Backlight and display device provided with same
US10935843B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 24, 2020 |
| Grant date | Mar 2, 2021 |
| Priority date | — |
| Expiry date | Jan 24, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/0252
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A backlight is configured by a power supply switching circuit configured to switch a supply destination of a power source voltage for LED driving among a plurality of blocks, a plurality of power source lines which are provided in one-to-one correspondence with the plurality of blocks and are each connected to an upstream end of each of LED units included in a corresponding block, an LED drive circuit including the same number of turn-on control switches, which are for controlling whether to supply a current to LEDs, as LED units included in each block, and one or more discharge control circuits provided for each block. The discharge control circuit lowers a voltage level at the upstream end of each of LED snits included in a corresponding block after an end of a period in which the power source voltage is supplied to the corresponding block.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.