High aperture liquid crystal display including thin film diodes, and method of making same
US6008872A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 13, 1998 |
| Grant date | Dec 28, 1999 |
| Priority date | — |
| Expiry date | Mar 13, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2300/0895
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A backlit transmissive liquid crystal display including non-linear resistive thin film diodes (TFDs). Select address lines on the active substrate provide both conventional address line functionality, as well as acting as one of the electrodes for each thin film diode. Two such diodes are provided in each pixel in certain embodiments. Still further, black matrix material is provided between the aforesaid address line material and the substrate so as to form rows of stacks on the active substrate. The thin film diode semi-insulating material, the address line material, and the black matrix material are patterned together in a single step to form elongated rows (or columns) on the active substrate. In such a manner, the display has reduced ambient light reflections, and reduce photosensitivity. Furthermore, because the pixel electrode, which also functions as the top TFD electrode in each pixel, overlaps both the select lines and portions of the color filter, a high pixel aperture ratio of at least about 70% is provided. The TFDs may be MIM diodes in certain embodiments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.