Liquid crystal display device and method of controlling the same
US10705377B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 21, 2019 |
| Grant date | Jul 7, 2020 |
| Priority date | — |
| Expiry date | Jun 21, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2330/12
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A liquid crystal display device including a display unit, a backlight including a plurality of light sources, an LED control circuit configured to output a PWM signal (LED control signal) based on a display synchronization signal, such that the light sources are intermittently lighted, and an LED driver configured to control a drive current that is supplied to the light sources, based on the PWM signal, is provided with a monitoring control unit that is configured to perform monitoring at least one of the PWM signal, the drive current, and the display synchronization signal, as a monitoring target. When an abnormality of the monitoring target is detected, the monitoring control unit controls a waveform of the PWM signal such that the drive current that is supplied to the light sources in the backlight becomes zero.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.