Color filter for liquid crystal display device and method for producing the color filter
US5705302A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 6, 1995 |
| Grant date | Jan 6, 1998 |
| Priority date | — |
| Expiry date | Jun 6, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/13439
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A color filter for a liquid crystal display device comprises an optically transparent substrate, a transparent conductive layer formed on the substrate, and a color layer formed on the transparent conductive layer with red, green and blue pixels arranged in a predetermined pattern. The color layer comprises pigments for coloring purpose and transparent conductive particles having a hydrophobic surface. The transparent conductive particles are included from 5% to 50% by volume of the color layer. The color layer may preferably have a specific resistivity of from 10.sup.-1 .OMEGA..multidot.cm to 10.sup.8 .OMEGA..multidot.cm. The transparent conductive particles comprise base transparent conductive particles having a hydrophobic compound bound on their surface by coupling or graft polymerization. A typical process of the color filter production comprises the steps of: (a) forming the transparent conductive layer of a predetermined pattern on the transparent substrate, (b) preparing a micelle colloid dispersion by dispersing a pigment and transparent conductive particles having hydrophobic surface in a medium containing a redox reactive surfactant and an electrolyte, and (c) carrying o…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.