AMOLED light sensing
US9183779B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 23, 2012 |
| Grant date | Nov 10, 2015 |
| Priority date | — |
| Expiry date | Aug 11, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/40
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present disclosure is directed to a method and apparatus for estimating ambient light conditions for an OLED display. Embodiments of the method and apparatus use one or more columns of OLEDs in the display to perform two functions: their typical function of emitting light in a display mode, and the additional function of sensing light in a sense mode. To perform the additional sense mode functionality, the one or more columns of OLEDs in the display are temporarily placed into a photovoltaic and/or photoconductive mode. A sensing circuit is used to measure this current produced by the one or more columns of OLEDs while operating in the sense mode and report it back to a controller. The controller can then use this information to estimate the ambient light conditions of the environment where the OLED display is currently operating and to perform a touch and/or proximity sensing function.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.