Electrophoresis display device
US8054288B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 16, 2007 |
| Grant date | Nov 8, 2011 |
| Priority date | — |
| Expiry date | Jul 27, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/0247
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An object of the present invention is to realize an image display device for color display with high luminance and high contrast. In the present invention, a unit cell 111 is filled with electrophoresis ink including two kinds of particles different in chargeability and color being dispersed in transmissive solvent 107. Voltage is applied to an opposite electrode 103, a stacked lower electrode 104 and an upper electrode 105 and thereby electrically charged particles 108a and charged particles 108b are moved to a first opening 106a and a second opening 106b where an insulating layer 110 is provided on the lower electrode 104 and the upper electrode 105. Thus assemblage and diffusion state of two kinds of particles are controlled. Thereby, a unit cell 111 obtains four display colors. Since the lower electrode 104 can be made to be a reflecting layer covering the entire unit cell, it is possible to make the aperture ratio large and the reflection percentage large.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.