Provided in the present application are a drive circuit, a drive controller, and a lamp. The drive circuit comprises a load module, an energy storage module, a constant-current control module and a sampling signal module, wherein the load module comprises a first load and a second load, which are connected to a power supply module; the energy storage module is connected to the first load, the power supply module charges the energy storage module, and the energy storage module can supply power to the load module; the constant-current control module comprises a first control unit and a fourth control unit, which are connected to the second load in parallel, and a second control unit and a third control unit, which are connected to the second load in series; and the sampling signal module comprises a diode D1 and a sampling module, which are arranged between the power supply module and the energy storage module, the sampling module sampling an output voltage of the power supply module and controlling the connection or disconnection of the first control unit, the second control unit, the third control unit and the fourth control unit. In the present application, an energy storage module and a constant-current control module are configured, such that a load can realize constant-current output when a voltage fluctuation is relatively large, thereby avoiding stroboflash of a lamp bead during the voltage fluctuation.
H05B 45/345 - Current stabilisationMaintaining constant current
H05B 45/59 - Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDsCircuit arrangements for operating light-emitting diodes [LED] responsive to LED lifeProtective circuits for reducing or suppressing flicker or glow effects
The present invention provides an LED light source simultaneously compatible with silicon-controlled-rectifier dimming and intelligent dimming. A central control unit is used for collecting a silicon-controlled-rectifier phase-cut angle of a power supply unit, generating a feedback signal according to the silicon-controlled-rectifier phase-cut angle and sending same to an intelligent dimming unit; the intelligent dimming unit is used for receiving a control instruction from an IOT terminal, generating a dimming signal according to the control instruction and the feedback signal and sending same to a constant-current unit, and is also used for generating an adjustment signal according to the control signal and sending same to the central control unit; the constant-current unit is used for adjusting the light emitting state according to the dimming signal; the central control unit is further used for generating a silicon-controlled-rectifier current control signal according to the silicon-controlled-rectifier phase-cut angle or the adjustment signal and sending same to a silicon-controlled-rectifier current output unit; the silicon-controlled-rectifier current output unit is used for adjusting an output current according to the silicon-controlled-rectifier current control signal. Therefore, compatibility control of silicon-controlled-rectifier dimming and intelligent dimming can be implemented, thus meeting user requirements.
Provided in the present invention is an LED driving data transmission method. When a current-stage driving module receives driving data from a previous-stage driving module, display data for the current-stage driving module is extracted from the driving data, driving data for a next-stage driving module is generated and output to an input port of the next-stage driving module, and an output port thereof also returns a backhaul pulse to a bidirectional port of the previous-stage driving module. If a bidirectional port of the current-stage driving module does not receive pulse information from the output port of the next-stage driving module, that is, the output port of the next-stage driving module cannot send a backhaul signal to the current-stage driving module, then the current-stage driving module can detect that the next-stage driving module has a fault, the bidirectional port of the current-stage driving module is switched to an output mode, and driving data after a third-level driving module is intercepted and forwarded, thereby ensuring that subsequent serial lamps will not be abnormal, and improving the reliability of an LED driving circuit.
H05B 45/50 - Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDsCircuit arrangements for operating light-emitting diodes [LED] responsive to LED lifeProtective circuits
4.
Dual-line protocol read-write control chip, system and method
A dual-line protocol read-write control chip, system and method. Said chip comprises: two front-stage ports, two rear-stage ports, a protocol decoding module, a data forwarding module, a read-back control module, a display control module, a gradient control module and an instruction control module; data is input to a chip based on a dual-line transmission protocol; after the chip decodes the data, the instruction control module controls a corresponding module according to the decoded instruction data; the data forwarding module forwards the data to a next-stage chip; in a read-back mode, the input and output ports of the chip are interchanged, so that corresponding state parameters can be read back from the chip, and then the working state of the chip is adjusted, and the gray scale of an LED light can be directly controlled according to the decoded gray scale data.
This application provides a constant-current drive circuit. First, the voltage at the input end is collected through peak-voltage sample and hold module to generate the input-voltage sampling signal, and the hold voltage at the current moment is obtained by calculating an average of the peak voltage of the input-voltage sampling signal and the hold voltage at the previous moment, and output as the output voltage signal to the voltage-controlled current source module. Then, a corresponding current signal is generated through the voltage-controlled current source module according to the output voltage signal and the preset second threshold voltage, and a mirror operation is performed on the current signal through the constant-current threshold control module to generate the mirrored current signal, and according to the mirrored current signal, the constant-current threshold is adjusted, so as to maintain the operation current flowing through the load a constant-current.
A configuration method and apparatus for an LED display screen, and a driving method and apparatus for an LED display screen. In the configuration method for the LED display screen, by configuring first address information and first startup information for driving chips, when the driving chips are driven, a target driving chip to be turned on can be determined by means of the first address information. Because the first startup information is configured for each driving chip, each first startup information corresponds to one first turn-on moment, the first startup information corresponding to different driving chips is different, and the first turn-on moments corresponding to different first startup information are different, only one driving chip is turned on at a same moment; and because the number of driving ports comprised in each driving chip is the same, at a same moment, the number of turned-on driving ports is the same, the number of driving ports in a turned-off state is the same, the number of discharged LED lamp strings is the same, and the turn-on response speeds of the driving ports are consistent.
H05B 45/00 - Circuit arrangements for operating light-emitting diodes [LED]
G09G 3/32 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
7.
LED system with controllable power supply and control method and device thereof
The present application relates to an LED system with controllable power supply and control method and device thereof. The control method comprises: detecting output port voltages of a main driving module, and when a number of ports whose voltage is less than a first preset voltage or a number of ports whose voltage is greater than a second preset voltage exceeds a first preset value, coarsely adjusting the power supply; determining by each of cascaded slave driving modules an adjustment strategy according to its own output port voltages and an adjustment strategy from a subsequent slave driving module, and sending its adjustment strategy to a previous slave driving module; determining by the main driving module an adjustment strategy of the power supply according to the adjustment strategy from the slave driving module and the output port voltages of the main driving module, and fine-adjusting the power supply.
The present application provides a method of LED driving pulse modulation, comprising the following steps: calculating a display period according to a set number of sub-period, a set number of gclk per line and a set number of line scan; converting input gray data according to a set number of gray level; dividing the converted gray data according to the number of sub-period, the number of gclk per line, and a composite number to obtain high-gray data, low-gray data, and compensation data; and calculating a number of gray level that needs to be displayed in a current sub-period according to the high-gray data, the low-gray data, and the compensation data. With the method of LED driving pulse modulation, any number of sub-period and any number of gclk per line can be set to solve the problem of non-linear gamma, and make the display effect more delicate and true.
G09G 3/32 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
Provided is an LED drive pulse modulation method, comprising the following steps: calculating a display period according to a specified quantity of sub-periods, number of gclk per row, and quantity of row scans; converting inputted grayscale data according to a specified grayscale series; obtaining high-grayscale data, low-grayscale data, and compensation data according to the quantity of sub-periods, the number of gclk per row, and grayscale data after segmenting and converting a composite number; and according to the high-grayscale data, the low-grayscale data, and the compensation data, calculating the quantity of grayscales requiring display in a current sub-period. According to the LED drive pulse modulation method of the present invention, any quantity of sub-periods and number of gclk per row can be specified so as to resolve the problem of gamma non-linearity, so that the display effect is more refined and real.
G09G 3/32 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
10.
DUAL-LINE PROTOCOL READ-WRITE CONTROL CHIP, SYSTEM AND METHOD
A dual-line protocol read-write control chip, system and method. Said chip comprises: two front-stage ports, two rear-stage ports, a protocol decoding module, a data forwarding module, a read-back control module, a display control module, a gradient control module and an instruction control module; a dual-line transmission protocol is used to input data to a chip; after the chip decodes the protocol data, the instruction control module controls a corresponding module according to the decoded instruction data; the data forwarding module forwards the data to a next-stage chip; in a read-back mode, the input and output ports of the chip are interchanged, so that corresponding state parameters can be read back from the chip, and then the working state of the chip is adjusted, and the gray scale of an LED lamp can be directly controlled according to the decoded gray scale data; in addition, the instruction data is sent to the chip by means of the protocol, so that when a fade-in instruction is received, the gray scale is controlled to gradually increase to the highest gray scale level, and when a fade-out instruction is received, the gray scale is controlled to gradually reduce to the lowest gray scale level.
The present application provides a control circuit and a control method with fixed bleed time, a trigger signal is obtained and transmitted via a detection module; a timing module starts timing upon receiving the trigger signal, and outputs an end-of-timing signal when a preset time is reached; a control module outputs a control signal according to the end-of-timing signal; a bleeder module bleeds off a current within the preset time according to the control signal; and when the control circuit is powered off, the detection module, timing module, control module and bleeder module automatically perform a power-off reset.
H05B 45/3575 - Emulating the electrical or functional characteristics of incandescent lamps by means of dummy loads or bleeder circuits, e.g. for dimmers
H03K 17/687 - Electronic switching or gating, i.e. not by contact-making and -breaking characterised by the use of specified components by the use, as active elements, of semiconductor devices the devices being field-effect transistors
12.
DISPLAY SCREEN OUTPUT PORT ANTI-CROSSTALK METHOD AND APPARATUS
A display screen output port anti-crosstalk method and apparatus. The anti-crosstalk method comprises the following steps: calculating the opening width of the output current of each port in a display sub-period according to sample data (S1); determining the port opening time point and port closing time point of each port in a display sub-period according to the opening time setting value and opening width of the output current (S2); and controlling the opening and closing of the corresponding port according to the port opening time point and the port closing time point (S3). Different ports start outputting current at different positions in a display period, but the display time width is not affected, so as to prevent different ports from being opened at the same time, thereby reducing signal crosstalk on a display screen and improving EMI.
G09G 3/32 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
Embodiments of the present application disclose an adaptive bleeder control method and circuit, the method including: acquiring a peak characterizing voltage of a grid, wherein the peak characterizing voltage is a voltage value that characterizes a peak state among the grid characterizing voltages that are detected within a preset time and being scaled in proportion to the magnitude of the grid voltage; generating a switch control signal according to the peak characterizing voltage; performing switch control according to the switch control signal to generate a bleeder signal; and performing bleeder control on a light source device according to the bleeder signal to connect or disconnect a loop with a SCR in the light source device. In the present application, the dimming function of the light source device while preventing the bleeder current path from being constantly closed and reducing system efficiency may be implemented.
H05B 45/14 - Controlling the intensity of the light using electrical feedback from LEDs or from LED modules
H05B 45/3575 - Emulating the electrical or functional characteristics of incandescent lamps by means of dummy loads or bleeder circuits, e.g. for dimmers
H05B 45/34 - Voltage stabilisationMaintaining constant voltage
14.
Smart lighting control device, method and lighting system capable of reducing standby power consumption
The application provides a smart lighting control device capable of reducing standby power consumption, wherein a control instruction is received by a control module, then an enable signal is sent by a standby processing module according to status of a flag bit signal of the control instruction to a data transmission module and a logic control module; and the data transmission module receives the control instruction according to the enable signal and transmits a sampled control instruction to the logic control module; and the logic control module controls a lamp according to the control instruction when a standby instruction bit is invalid, and sends a standby instruction to the standby processing module when the standby instruction bit is valid; and the standby processing module disable the data transmission module and the logic control module according to the standby instruction, thereby standby power consumption of the lamp is reduced.
The present solution relates to the technical field of electronic circuits and provides a control circuit and a control method capable of fixing discharge duration. A detection module acquires and transmits a trigger signal; a timing module starts timing upon receiving the trigger signal, and when a preset duration is reached, outputs a timing end signal; a control module outputs a control signal according to the timing end signal; a discharge module discharges the current within a preset duration according to the control signal; and when power failure occurs in the control circuit, the detection module, timing module, control module, and discharge module automatically perform a power failure reset, so that all modules can perform a new round of logic control after power failure reset. By means of fixing the discharge duration, a system can achieve high working efficiency when the opening angle of a thyristor is maximized, and during the dimming process of the thyristor, when the main circuit current is lower than the thyristor holding current, the thyristor is maintained normally through the discharge current, so that the system works normally.
A smart lighting control device capable of reducing standby power consumption. A control module (10) of the smart lighting control device receives a control instruction, and then a standby processing module (30) sends, according to a status of a flag-bit signal of the control instruction, a turn-on signal to a data transmission module (40) and a logic control module (50). The data transmission module (40) receives the control instruction according to the turn-on signal, and transmits a sampled control instruction to the logic control module (50). When a standby instruction bit in the control instruction is invalid, the logic control module (50) controls a lamp (60) to operate according to the control instruction. When the standby instruction bit is valid, the logic control module (50) sends a standby instruction to the standby processing module (30). The standby processing module (30) controls, according to the standby instruction, the data transmission module (40) and the logic control module (50) to turn off, thereby reducing standby power consumption of the lamp (60).
A circuit and method for linear constant current control for an LED lamp, and an LED device are provided. The power compensation for the input linear power network is performed. When the triac dimmer is connected into the AC linear power network, constant current bleed-off is performed on the current passing through. In the meanwhile, when the triac dimmer detection module detects that a dimmer is connected in, the corresponding bleeder current is switched off, thereby improving the efficiency of the system. In this way, the input power of the system remains basically unchanged as the input voltage changes, besides, the constant current output drives the LED lamp, such that it is solved the problem that in the existing LED lighting and driving technique, the brightness of the entire LED lamp would change in case of voltage fluctuation of the linear power network.
A method for generating a stable direct current signal, a silicon controlled switch dimming method and device, the silicon controlled switch dimming method comprising: adjusting a phase angle of a silicon controlled switch and outputting an alternating current signal related to the phase angle of the silicon controlled switch (S101); rectifying the alternating current signal (S102); converting the rectified electric signal into a steady direct current signal one-to-one corresponding to the phase angle of the silicon controlled switch, and the stable direct current signal decreases as the phase angle of a silicon controlled switch increases (S103); controlling turning on or off of an output current regulating circuit according to the magnitude of the stable direct current signal so as to control the plurality of serially connected LED lamp groups to be turned all on or all off (S104). The generated stable DC signal one-to-one corresponds to the phase angle of the silicon controlled switch and decreases with the increase of the phase angle of the silicon controlled switch. The stable direct current signal can control work status of the plurality of LED lamp groups connected in series, thereby making the plurality of LED lamp groups connected in series be turned all on or all off.
H05B 33/08 - Circuit arrangements for operating electroluminescent light sources
H02M 7/155 - Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
H05B 41/392 - Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor
Provided in the invention are an LED constant-current driving circuit, comprising: a power supply module, a detection control module, N strings of LED sub-lamp sets which are serially connected, N constant-current control modules and N-1 controllable switch modules, wherein N is larger than or equal with 2. The power supply module is serially connected with the N strings of LED sub-lamp sets for supplying supply voltage. A connecting wire is leaded out of one end, which is far from the power supply module, of each string of LED sub-lamp sets to be connected to a corresponding constant-current control module and then is grounded. The constant-current control module makes constant output current pass through the corresponding LED sub-lamp set. The (N-1) strings of LED sub-lamp sets are connected with corresponding controllable switch modules in parallel. The detection control module is used for detecting the supply voltage supplied from the power supply module and outputs N constant-current control signals and (N-1) switching control signals according to the magnitude of the supply voltage to control the corresponding constant-current control module respectively. The (N-1) switching control signals respectively switch on or switch off the corresponding controllable switching module for realizing short circuit of the corresponding LED sub-lamp set, to thereby control the N strings of LED sub-lamp sets to emit light alternately. Also provided in the invention is a lamp.
A linear constant current drive circuit for an LED and an LED illuminating apparatus, comprising a rectifier module (1), a serial-to-parallel conversion module (2), a first constant current control module (3), a second constant current control module (4), a third constant current control module (5) and a switch module (6). If an output voltage of the rectifier module is smaller than or equal to a first pre-set voltage threshold value, a first constant current control module and a second constant current control module respectively perform constant current control over a first LED light string (10) and a second LED light string (20) connected in parallel; if the output voltage of the rectifier module rises to be greater than the first pre-set voltage threshold value and continues to rise and is smaller than a second pre-set voltage threshold value, the serial-to-parallel conversion module controls the first constant current control module to perform constant power control over an input power of a backward stage circuit; and if the output voltage of the rectifier module rises to be greater than or equal to the second pre-set voltage threshold value, a third constant current control module performs constant current control over two light strings connected in series, thereby implementing the application of a broad input voltage.
Disclosed are a linear constant-current LED drive circuit for eliminating a current ripple, and an LED light-emitting device. The drive circuit comprises a first branch and a second branch connected in parallel to each other, wherein the first branch comprises a ripple filtering chip (20) and an LED load (10) connected in series; the second branch comprises a first capacitor (C1); and a whole after parallel connection of the first branch and the second branch, and a linear constant-current control circuit (30) are connected in series between direct-current output ends of rectifier bridges (50). With respect to a traditional method using a means of increasing capacitance, the ripple filtering chip (20) and the LED load (10) are connected in series and then are connected to the first capacitor (C1) in parallel, and driven by such a method, the first capacitor (C1) does not need larger capacitance, so that the capacitance of the capacitor can be greatly reduced, and the purpose of eliminating a current ripple of an LED light string can be achieved, current at two ends of the LED light string is kept constant, a smaller system area is occupied as well, and the flexibility of an application of a system is increased and the stability of the system is improved.
An LED linear constant current control circuit (300) and an LED light emitting device. The control circuit (300) is connected to an LED light string (200), which is formed by N LED light groups (LED1, LED2, …, LEDn-1 and LEDn) in series connection. The control circuit (300) comprises: a reference voltage generating module (300), for sampling an input voltage of the LED light string (200), and converting the input voltage to N reference voltages (V1, V2, …, Vn-1 and Vn) having different constant peak values but the same phase as the input voltage; and N output current control modules (CTR1, CTR2, …, CTRn-1 and CTRn), having control ends thereof that respectively receive the corresponding reference voltages, input ends thereof being respectively connected to output ends of the corresponding LED light groups, and output ends thereof being connected together in parallel and grounded through a first resistor (Re). When the input voltage of the LED light string (200) reaches a forward conduction voltage of M LED light groups, the first M LED light groups conduct, and a current corresponding to the Mth reference voltage is generated at the first resistor (Re) by the Mth output current control module. The present invention provides a high power factor and low total harmonic distortion, and is capable of preventing the current passing through LED lights from changing with a change in the peak value of the input voltage.
A dual-voltage linear constant-current driving power supply for an LED, for use in driving a first LED light string (101) and a second LED light string (102), comprising: a signal sampling circuit (104), a diode (103), a first constant-current driving circuit (105), and a second constant-current driving circuit (106). An anode of the first LED light string (101) is connected to the second constant-current driving circuit (106) and the signal sampling circuit (104). A cathode of the first LED light string (101) is connected to the first constant-current driving circuit (105) and an anode of the diode (103). A cathode of the diode (103) is connected to an anode of the second LED light string (102) and the second constant-current driving circuit (106). A cathode of the second LED light string (102) is connected to the first constant-current driving circuit (105). The first constant-current driving circuit (105) is connected to the signal sampling circuit (104). The connection point of the first LED light string (101), the first constant-current driving circuit (105), and the signal sampling circuit (104) is a power supply input end. At a low voltage, the first LED light string (101) and the second LED light string (102) work in parallel. At a high voltage, the first LED light string (101) and the second LED light string (102) work in series.
A universal-voltage constant-current linear LED drive circuit, comprising: a diode (102), a first LED (101), a second LED (103), a series-parallel switching circuit (107), a first constant-current control circuit (104), a second constant-current control circuit (105), and a third constant-current control circuit (106). The positive electrode of the first LED (101) is connected to the second constant-current control circuit (105). The negative electrode of the first LED (101) is connected to the first constant-current control circuit (104) and the positive electrode of the diode (102). The negative electrode of the diode (102) is connected to the positive electrode of the second LED (103) and the second constant-current control circuit (105). The negative electrode of the second LED (103) is connected to the third constant-current control circuit (106). The third constant-current control circuit (106) is connected to the series-parallel switching circuit (107). The series-parallel switching circuit (107) is connected to the first constant-current control circuit (104). The connection point of the first LED (101) to the second constant-current control circuit (105) is a power supply input end. In a low-voltage scenario, the first LED (101) and the second LED (103) are connected in parallel to operate; in a high-voltage scenario, the first LED (101) and the second LED (103) are connected in series to operate. In this way, the present invention enables series-parallel connection switching in a circuit according to the level of an operation voltage.
A method for generating a stable direct current signal, a silicon controlled switch dimming method and device, the silicon controlled switch dimming method comprising: adjusting a phase cut angle of a silicon controlled switch and outputting an alternating current signal related to the phase cut angle of the silicon controlled switch (S101); rectifying the alternating current signal (S102); converting the rectified electric signal into a steady direct current signal one-to-one corresponding to the phase cut angle of the silicon controlled switch, and the stable direct current signal decreases as the phase cut angle of a silicon controlled switch increases (S103); controlling turning on or off of an output current regulating circuit according to the magnitude of the stable direct current signal so as to control the plurality of serially connected LED lamp groups to be turned all on or all off (S104). The generated stable DC signal one-to-one corresponds to the phase cut angle of the silicon controlled switch and decreases with the increase of the phase cut angle of the silicon controlled switch. The stable direct current signal can control work status of the plurality of LED lamp groups connected in series, thereby making the plurality of LED lamp groups connected in series be turned all on or all off.
A high voltage device with composite structure comprises a high voltage power MOS transistor HVNMOS and a JFET. The high voltage power MOS transistor HVNMOS comprises a drain, a source, a gate and a substrate, and a P-type well region Pwell as a conducting channel which is arranged between the source and the drain. The JFET comprises the drain, the source, the gate and the substrate, and an N-type well region Nwell as a conducting channel which is arranged between the source and the drain. The high voltage power MOS transistor HVNMOS and the JFET share the same drain, and the drain is processed by using N-type double diffusion process. The embodiment of the present invention further presents a starting circuit using the high voltage device with composite structure.
H02M 1/36 - Means for starting or stopping converters
H01L 29/06 - Semiconductor bodies characterised by the shapes, relative sizes, or dispositions of the semiconductor regions
H01L 29/78 - Field-effect transistors with field effect produced by an insulated gate
H01L 29/808 - Field-effect transistors with field effect produced by a PN or other rectifying junction gate with a PN junction gate
H01L 27/085 - Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being a semiconductor body including only semiconductor components of a single kind including field-effect components only
H03K 17/22 - Modifications for ensuring a predetermined initial state when the supply voltage has been applied
H01L 27/02 - Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including integrated passive circuit elements with at least one potential-jump barrier or surface barrier
27.
Method and system for writing address codes into LED display devices
The present invention relates to data coding control field, and provides a method and system for writing address codes into LED display devices. According to the embodiments of the present invention, when all the LED display devices in parallel in the display module are in series with the same number of LED display devices, the address code is written into the primary LED display device and LED display devices in series with the primary LED display device respectively according to the preset address code and the preset number in the series connection, and the address code is written into one or more LED display devices connected in parallel with the primary LED display device and LED display devices connected in series with each of the one or more LED display devices in parallel with the primary LED display device successively in an address code ascending manner. Thus address codes are written into the LED display devices at a time, it is not necessary to write address codes into the LED display devices one by one, therefore, the efficiency of writing codes is improved.
G09G 3/32 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
G09G 3/20 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix
H05B 33/08 - Circuit arrangements for operating electroluminescent light sources
The present invention belongs to the field of control technologies, and in particular, to a parallel-connection lamp control system and a separate controller thereof. The separate controller provided in the present invention comprises a control module and a control interface connected to the control module. The control interface comprises a data output interface and a coding output interface. The data output interface and the coding output interface are respectively connected to a data input end and a coding input end of a lamp group. The control module outputs a coding signal to the lamp group to start a function of continued formation of an address code for lamps in the lamp group, and the data output interface outputs display data to the lamp group, so that each lamp captures corresponding display data according to an address code of the lamp, thereby implementing a function that a separate controller implements at the same time coding signal output and display data output for a lamp. The entire parallel-connection lamp control system has advantages such as simple and convenient wiring and high safety.
The present invention belongs to the technical field of controlling landscape decoration lamps, and provides a landscape decoration lamp system and an address encoding and display control method for same. In the present invention, multiple display modules comprising a main control module are used in a landscape decoration lamp system. The multiple display modules acquire display data from a controller in a parallel connection manner, and address encoding operations are performed on the multiple display modules one time in a manner of level-by-level transfer in a serial connection. If a main control module in a display module becomes ineffective, the main control modules in the rest display modules can normally implement corresponding display according to saved address encoding data and display data acquired from a controller, thereby solving a problem that in an existing landscape decoration lamp system, when received display data is transferred level by level in a manner of a serial connection, because a driving chip of one or more decoration lamps becomes ineffective and leads to that subsequent decoration lamps cannot work normally.
The present invention belongs to the field of LED control technologies, and in particular, to an LED parallel-connection lamp control system and a parallel-connection lamp control circuit thereof. The parallel-connection lamp control circuit provided in the present invention is applicable to an LED parallel-connection lamp control system. The circuit comprises a display data relay module, a protocol decoding module, an address data relay module, and a display driving module. The address data relay module receives address data, and forwards the address data to the protocol decoding module to form an address code for the address data, and outputs new address data. The display data relay module receives a display data stream. The protocol decoding module captures corresponding display data according to the address code, outputs the display data to a lamp control module to drive a lamp to work. At the same time, the display data relay module outputs remaining display data. An entire lamp control circuit implements a function of continued formation of an address code, and may further extend an LED parallel-connection lamp control system into an LED serial-connection, parallel-connection lamp control system.
The present invention is applicable for the technical field of lamp control and provides an address configuration method and device in a parallel display control system. The method includes: each address data port receives address data sent from a controller in the parallel display control system, wherein each address data port is located on each parallel display control unit respectively and is connected in series step by step with each other, and the address data include at least one address packet; according to the sequence of the series connection step by step, each address data port sequentially intercepts the address data packet first arriving at the corresponding address data port in the address data to perform the address configuration, and sequentially generates intercepted address data; when the address configuration is finished, the intercepted addresses are sequentially transmitted to the next address configuration data port in series connection with the address data port, so that the next address configuration data port can finish the address configuration. In the present invention, multiple parallel display control units can be configured through the single address configuration operation, thus improving the efficiency of the address configuration.
The present invention is applicable to the field of communications, and provided are a decoding method and apparatus of a transmission protocol and a transmission protocol decoding chip. The method comprises the steps of: generating an oscillator signal; detecting a frame start signal, and outputting a sampling control signal when the frame start signal is detected; after receiving the sampling control signal, counting the number of oscillation periods of the oscillator signal in a time period of a low level digit of a frame start byte, and performing division calculation on a count value and outputting a quotient and a remainder; and determining a sampling period according to the quotient and the remainder, so as to generate a sampling pulse, and decoding a data byte according to the sampling pulse. The present invention counts the number of oscillation periods of an oscillator signal in a time period of a low level digit of a frame start byte, performs division calculation on a count value, outputs a quotient and a remainder and performs decoding according to the quotient and the remainder, so that there is no accumulation error, the decoding accuracy rate is improved greatly, and it is simple to implement and has a low cost and good stability.
The present invention relates to the deign field of switch power supply driving circuits, and provides a switch power supply driving chip and a switch power supply driving circuit. The chip detects a valley bottom of a transformer in a quasi-resonance state after the transformer is demagnetized, by using a quasi-resonance control and valley bottom detection circuit. A power supply circuit determines, according to the detected valley bottom and a current voltage value of a power supply pin of the chip, whether to supply power to the power supply pin by using a power tube drain pin of the chip. A pulse frequency modulation and control circuit adjusts a switch frequency of a power tube in the chip according to a value of each of a feedback pin and a current detection pin of the chip, so as to implement constant voltage or constant current output of the switch power supply driving circuit. The switch power supply driving circuit using the chip does not need an auxiliary winding, so that the number of peripheral circuit devices of the switch power supply driving chip is reduced, the cost of the switch power supply driving circuit is lowered, the integration is improved, the board area is reduced, the system operation reliability is improved, and the electricity taking dynamic adjustment is implemented.
H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
34.
ADDRESS CODE WRITING METHOD AND SYSTEM FOR LED DISPLAY DEVICE
Provided are an address code writing method and system for an LED display device. When all LED display devices which are mutually connected in parallel in an LED display module are all connected to LED display devices of the same number in series, according to pre-set address codes and a pre-set series connection number value, in the manner of the progressive increase of the address codes, starting from a first LED display device, an address code writing operation is conducted in sequence on one or more LED display devices which are connected to the first LED display device in parallel and an LED display device which is connected in series to each LED display device in the one or more LED display devices, thereby achieving the one-time code writing operation on the LED display devices, so that there is no need to conduct the code writing on the LED display devices one by one, thereby improving the code writing efficiency.
G09G 3/32 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
A constant current drive controller and an LED constant current drive circuit. The constant current drive controller comprises a capacitive circuit which is used for outputting a degaussing time detection signal, and a control circuit which is used for sampling and timing the degaussing time detection signal output by the capacitive circuit to obtain a degaussing time and controlling the on-off frequency of an external on-off circuit according to the degaussing time. The LED constant current drive circuit comprises a transformer, an above-mentioned constant current drive controller, an on-off circuit and a rectification filter circuit. The constant current drive controller do not use an auxiliary winding and a voltage division resistor of a transformer, thereby simplifying the structure of a peripheral circuit, improving the integration level of a circuit, reducing costs, reducing the area of a system board and avoiding the problem of low reliability caused by the exposure of a feedback pin.
The present invention is suitable for an LED controlling field, and provides an LED controlling circuit with high power factor and an LED lighting device. In the present invention, by using an LED current controlling circuit with high power factor comprising a plurality of output current controlling modules, a resistor Re and a reference voltage generating module, the LED groups is driven accordingly in a piecewise manner to be on and a current flows through the LED groups according to the input voltage of the LED strip, without sampling the input voltage of the LED strip by a sampling circuit and without increasing the number of high cost component, which increase the utilization of the LED, the power factor of the whole LED controlling circuit and the efficiency of the system, thereby solving the problem of low power factor and low efficiency system existing in the prior art.
Provided is a high-voltage device of a composite structure, comprising: a high-voltage power MOS transistor (HVNMOS)and a JFET, wherein the high-voltage power MOS transistor (HVNMOS) comprises a drain electrode, a source electrode, a gate electrode and a substrate, a conducting channel being a P-type well region (Pwell) between the source electrode and the drain electrode; the JFET comprises a drain electrode, a source electrode, a gate electrode and a substrate, a conducting channel being an N-type well region (Nwell) between the source electrode and the drain electrode. The high-voltage power MOS transistor (HVNMOS) shares the same drain electrode with the JFET, and the drain electrode adopts an N-type double diffusion process. Also provided is a starting circuit using the above-mentioned high-voltage device of a composite structure. Therefore, by means of the high-voltage device of a composite structure, the area of the chip is effectively saved, and the cost of the chip is reduced.
H01L 27/02 - Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including integrated passive circuit elements with at least one potential-jump barrier or surface barrier
H01L 27/088 - Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being a semiconductor body including only semiconductor components of a single kind including field-effect components only the components being field-effect transistors with insulated gate
H01L 27/098 - Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being a semiconductor body including only semiconductor components of a single kind including field-effect components only the components being PN junction gate field-effect transistors
H03K 3/353 - Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of field-effect transistors with internal or external positive feedback
38.
LED CONTROL CIRCUIT WITH HIGH POWER FACTOR AND LED ILLUMINATING DEVICE
An LED control circuit (200) with a high power factor and an LED illuminating device. An LED current control circuit which comprises a plurality of output current control modules, a resistor Re and a reference voltage generation module and has a high power factor is adopted. Therefore, on the premise that a sampling circuit is not required to sample an input voltage of an LED lamp string (100) and no high-cost element is added, LED lamp groups in the LED lamp string (100) are driven to be conducted and electrified in sections stage-by-stage according to the input voltage of the LED lamp string (100), so that the utilization rate of an LED is improved, a power factor and system efficiency of the entire LED control circuit (200) are enhanced, and the problems of a low power factor and low system efficiency in the prior art are solved.
A data transmission method and a data receiving device are provided. The data receiving device receives data from a data line and contains M-numbered data ports (10), wherein each data port (10) contains a memory area with N-numbered data bits. When n bits of data are required to be transmitted to each data port (10), the data transmission method comprises the following steps: S01, the t-th M bits of data are transmitted to the (N-t+1)-th data bit of each of the M-numbered data ports (10), the data receiving device sends the (N-t+1)-th bit of data latching signal; S02, with the setting t=t+1, step S01 is repeated until t is equal to n; and S03, the data receiving device sends the entire data latching signal. By the method of transmitting the same number of data bits of data via different ports at the same time, the actual required data volume is transmitted. Therefore, when the transmission data volume is reduced, only the corresponding data volume needs to be transmitted; and compared with the traditional data transmission method, the data transmission rate is increased.
G09G 3/20 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix
A method for display control and a device for the same. The method comprises the following steps of: acquiring a preset brightness set value Mi and inputting the same into a data strobe unit (130) as strobe data; inputting a base clock into a counter (110), with the counter (110) outputting a periodic digital signal Qi; passing the signal Qi through a logic unit (120) and then outputting an Ai into the data strobe unit (130) as the strobed data; outputting by the data strobe unit (130) a Di, and after passing the Di through a logic combiner (140) outputting pulse width modulated (PWM) pulse signals OUT; and driving, by the PWM signals OUT, a light emitting diode (LED) to carry out the display control. In the technical solution of the present invention, under the premise that the precision of the original data is unaffected, the display control is achieved at a high refresh frequency by generating the pulse width modulated pulse signals at a higher frequency, and at the same time the driving effect at the output port is ensured by properly adjusting the duty ratio of the pulse width modulated (PWM) pulse signals. Furthermore, implementing the above solution by way of the logic combination made to the outputs of the counter and by way of data strobing means is simple and highly efficient.
G09G 3/34 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix by control of light from an independent source
G09G 3/20 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix
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