Electro-optic displays and methods for discharging remnant voltage using backlight
US12339559B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 27, 2022 |
| Grant date | Jun 24, 2025 |
| Priority date | — |
| Expiry date | Feb 9, 2044 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/16766
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method and apparatus for reducing a remnant voltage of an electro-optic display. The display includes a light-transmissive front electrode, a layer of electro-optic material, pixel electrodes, thin film transistors positioned adjacent to the electro-optic material, a light source positioned adjacent the thin film transistors, and a display driver coupled to the light source and to a gate and source line of each thin film transistor. Each thin film transistor includes a photo-sensitive semiconductor region. The layer of electro-optic material and the light source are disposed on opposite sides of the thin film transistors. The display driver is configured to apply substantially the same voltage to the front electrode and source lines of the thin film transistors, and activate a driving signal to the light source to emit a light having an intensity sufficient to activate the thin film transistors to create a conduction path for draining a remnant voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.