Abstract

The present invention relates to an electrophoretic ink composition having variable transmittance properties. The ink composition comprises: nano-ink particles which have a coating layer and consist of porous parent particles; a solvent in which the nano-ink particles are mixed; and a dispersant which is mixed in the solvent and performs a function of uniformly dispersing the nano-ink particles in the solvent, wherein the nano-ink particles have a sedimentation rate of <0.5 μm/day in the solvent.

IPC Classes  ?

• C09D 11/037 - Printing inks characterised by features other than the chemical nature of the binder characterised by the pigment
• C09D 11/033 - Printing inks characterised by features other than the chemical nature of the binder characterised by the solvent
• G02F 1/167 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
• G02F 1/1675 - Constructional details

Abstract

The present invention relates to an active functional decorative film. The active functional decorative film comprises: a driving layer including charged particles dispersed in a fluid; a first electrode layer and a second electrode layer positioned on the upper surface and the lower surface of the driving layer; and a light collection layer which is positioned on one of the upper surface of the first electrode layer and the lower surface of the second electrode layer, and which includes light collection particles for reflecting or transmitting specific light.

IPC Classes  ?

• G02F 1/167 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
• G02F 1/1677 - Structural association of cells with optical devices, e.g. reflectors or illuminating devices
• G02F 1/1676 - Electrodes
• G02B 5/28 - Interference filters
• G02F 1/1685 - Operation of cellsCircuit arrangements affecting the entire cell
• G02F 1/16757 - Microcapsules
• G02F 1/1681 - GasketsSpacersSealing of cellsFilling or closing of cells having two or more microcells partitioned by walls, e.g. of microcup type
• G02F 1/1334 - Constructional arrangements based on polymer-dispersed liquid crystals, e.g. microencapsulated liquid crystals
• G02F 1/15 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on an electrochromic effect
• B44F 1/10 - Changing, amusing, or secret pictures

Abstract

The present invention relates to a color-changeable ink composition with a color changing by the application of an electric field, which is used in an electrophoretic display. The color-changeable ink composition comprises: first particles containing a pigment of a first color; a fluid having a solution in which a dye of a second color is saturated and dissolved; and second particles in a colloidal form of the second color where the dye, being supersaturated, remains in an undissolved state within the solution, wherein the first particle and the second particle may move in opposite directions by the application of the electric field.

IPC Classes  ?

• C09D 11/50 - Sympathetic, colour-changing or similar inks
• C09D 11/52 - Electrically conductive inks
• C09D 11/03 - Printing inks characterised by features other than the chemical nature of the binder
• G02F 1/167 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
• G02F 1/1681 - GasketsSpacersSealing of cellsFilling or closing of cells having two or more microcells partitioned by walls, e.g. of microcup type
• G02F 1/1676 - Electrodes
• G02F 1/1675 - Constructional details