Backlight control circuit, control method thereof and display device
US12058795B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 27, 2021 |
| Grant date | Aug 6, 2024 |
| Priority date | — |
| Expiry date | Dec 27, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G5/10
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In the backlight control circuit; a luminous flux sensing sub-circuit senses luminous flux of a display device, obtains and outputs a first control signal from a first control signal output terminal; a control sub-circuit includes N control units each including a first/second sub-unit; the first sub-unit connects or disconnects an output terminal of the second sub-unit and the backlight control signal output terminal under the control of the first control signal, the second sub-unit connects or disconnects a signal input terminal and the output terminal of the second sub-unit under the control of the second control signal; the N second control signal output terminals provide effective second control signals in a time division manner; conduction thresholds corresponding to the N first sub-units increase sequentially, and when a corresponding relationship between the first control signal and the conduction threshold is met, the first transistor is turned on.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.