Light emitting diode display and driving method thereof for reducing brightness change due to refresh rate variation
US11508305B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 18, 2020 |
| Grant date | Nov 22, 2022 |
| Priority date | — |
| Expiry date | Jan 28, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2340/0435
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A driving method of LED display, configured to be applied to an LED display capable of varying a refresh rate thereof and able to reduce brightness changes due to refresh rate variation, is disclosed in the present disclosure. This driving method includes: controlling an organic light-emitting diode of the LED display by an emission signal having a plurality of frame periods, with each of the frame periods having a PWM part with a duty ratio; detecting whether a change in the refresh rate of the LED display exists; and performing a compensation procedure when the change is detected, with the compensation procedure compensating a brightness difference of the organic light-emitting diode occurring due to the change in the refresh rate by adjusting the duty ratio of the PWM part. Said LED display is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.