LED driving circuit, display panel, and pixel driving device
US11551606B2 · kind B2 · utility
4Cited by
2References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 8, 2021 |
| Grant date | Jan 10, 2023 |
| Priority date | — |
| Expiry date | Dec 8, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2310/066
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Embodiments relate to display panel and pixel driving device techniques. A hybrid scheme is provided in that a PWM (pulse width modulation) scheme, in which a ramp voltage is supplied as a gate voltage of a transistor and an LED is turned off at a time point when the gate voltage becomes the same as a threshold voltage, and a PAM (pulse amplitude modulation) scheme, in which a start voltage of the ramp voltage is determined depending on a gray scale value of a pixel, are combined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.