Liquid crystal display and overheat protection method thereof
AssigneeMitac Technology Corp.
InventorChang-Han Shen
Life of this patent
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Abstract
A liquid crystal display equipped with an overheat protection device and overheat protection method is disclosed. When a temperature sensor measures that the temperature of a LED (Light-Emitting Diode) backlight module is overheated and possibly will cause damage, the overheat protection device descend the luminance of the LED backlight module to lower the temperature inside the liquid crystal display.
Claims20
A liquid crystal display, comprising:
- a display panel displaying images;
- a LED (Light-Emitting Diode) backlight module, providing a light source to the display panel;
- a luminance control module, controlling the luminance of the LED backlight module;
- and
- an overheat protection device, comprising:
- at least one temperature sensor, measuring temperature of LED backlight module;
- and
- an overheat processing module electrical connecting with the temperature sensor, when the monitored temperature of the temperature sensor is higher than a protection temperature, the overheat processing module drives the luminance control module to descend the luminance of the LED backlight module to protect the liquid crystal display.
A liquid crystal display, comprising:
- a display panel displaying images;
- a LED (Light-Emitting Diode) backlight module, providing a light source to the display panel, the LED backlight module comprising a LED light set, a light guiding board and an optical film;
- a luminance control module, controlling the luminance of the LED backlight module;
- and
- an overheat protection device, comprising:
- at least three temperature sensors, measuring temperatures of the LED light set, the light guiding board and the optical film respective;
- and
- an overheat processing module, electrically connecting with the temperature sensors, when the temperature sensors measure that any temperature of the LED light set, the light guiding board and the optical film is higher than a respectively corresponding protection temperature, the overheat processing module drives the luminance control module to descend the luminance of the LED backlight module to protection the liquid crystal display.
An overheat protection method adapted to a liquid crystal display, the liquid crystal display comprising a display panel and a LED (Light-Emitting Diode) backlight module, the method comprising the steps of:
- measuring temperature of the LED backlight module and comparing with at least one protection temperature;
- and
- descending the luminance of the LED backlight module to protect the liquid crystal display when the temperature of the LED backlight module is higher than the protection temperature.
Dependencies are inferred from the claim text.