Backlight driving device, driving method, backlight module and display device
US11176895B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 21, 2019 |
| Grant date | Nov 16, 2021 |
| Priority date | — |
| Expiry date | Aug 21, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/064
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A backlight source of a backlight module of a display device is divided into N*M regions. A backlight driving device includes: an MCU configured to acquire backlight data about the N*M regions corresponding to a current display image of the display device and transmit the backlight data about the N*M regions to a backlight source driving circuitry in a one-tone manner; and the backlight source driving circuitry including M PWM outputs and N registers corresponding to each PWM output. The N*M registers of the backlight source driving circuitry correspond to the N*M regions respectively. The backlight source driving circuitry is configured to receive backlight data about the N*M regions from the MCU, and write the backlight data about each region into a corresponding register, so as to control luminance of the corresponding region in accordance with the backlight data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.