Hybrid pulse width modulation for display device
US11056037B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 29, 2019 |
| Grant date | Jul 6, 2021 |
| Priority date | — |
| Expiry date | Jan 29, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/0666
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A display operates a plurality of light emitters using pulse width modulations (PWM). Pixel data for a pixel location may be separated into a first subset of bits and a second subset of bits. The display device turns on first light emitters for first PWM turn-on times in accordance with the first subset of bits within a PWM cycle. The display device turns on second light emitters for PWM on time second PWM turn-on times in accordance with the second subset of bits within the PWM cycle. The current level that drives the first emitters may remain constant during the first turn-on times but may be higher than the current level that drives the second emitters. The first emitters may generate light in accordance with the most significant bits of pixel data while the second emitters may generate light in accordance with the least significant bits of the pixel data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.