Color Vertically Aligned Liquid Crystal Displays彩色垂直態液晶顯示器
Color liquid crystal displays (LCD) are usually made by putting color filters onto the individual pixels. These color filters are resins with color pigments. Full color displays can be made by a combination of the red, green and blue primary colors. This coloring scheme is the predominant technology for active matrix as well as passive matrix LCDs currently in use.
This new method makes available an alignment method for liquid crystal cells, making it possible to obtain vivid colors in a low twist LCD without the use of color filters.
The vertical alignment allows for the voltage off state to be very bright. It can also be colored depending on the polarizer angles. By turning on the voltage, the display will show various colors. Such displays have many applications in situations requiring only a few colors without gray scales. Examples are watches and clocks that can change colors, electronic games, etc. The invention can be truly reflective as well as transflective in nature, and is simple to produce.
1. Instead of focusing on the supertwisted nematic (STN) display with a twist angle of larger than 180˚, the invention displays novel techniques for low twist angles
2. Lower cost and no color filter is needed to generate color
3. Easier manufacturing process
- Low cost electronic games
- Watches and clocks
- Toys
- Calculators
Patent Number: HK1079292A1
Application Number: HK2005110929A
Priority Date: 28 Nov 2003
Priority Number: HK1079292A1
Application Date: 30 Nov 2005
Publication Date: 26 Jun 2009
IPC Current: G02B000530 | G02F00011335 | G02F0001139 | G02F00011337 | G02F0001137
Assignee Applicant: The Hong Kong University of Science & Technology
Title: COLOR VERTICALLY ALIGNED LIQUID CRYSTAL DISPLAYS
Usefulness: COLOR VERTICALLY ALIGNED LIQUID CRYSTAL DISPLAYS
电子
显示
30 Nov 2005
Hong Kong 05110929.0
Hong Kong HK1079292
TTC.PA.217S
香港
