Display device and backlight control method
US10699649B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 23, 2019 |
| Grant date | Jun 30, 2020 |
| Priority date | — |
| Expiry date | Jan 23, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/064
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A display device including a display panel, a backlight unit, a display driving circuit, and a backlight driving circuit is provided. The display panel includes multiple display zones. The backlight unit includes multiple light sources corresponding to the multiple display zones respectively. The display driving circuit receives an image signal and calculates a local dimming value for each display zone according to the image signal. The image signal includes multiple image frames. The display driving circuit drives the display panel to display the multiple image frames sequentially in multiple frame intervals each including a vertical blanking interval and a data scan interval. The backlight driving circuit provides a backlight pulse for each light source and adjusts the width and/or the intensity of each backlight pulse according to the local dimming value for each display zone. The backlight driving circuit provides the backlight pulse in the vertical blanking interval.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.