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Backlight control module, backlight control method, and liquid crystal display device

A technology for backlight control and display devices, applied in lighting devices, light sources, electric light sources, etc., can solve problems such as dynamic afterimage and synchronization, and achieve the effects of saving power consumption, reducing light leakage, and increasing dynamic contrast.

Active Publication Date: 2014-10-29
WISTRON CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the frequency of the pulse width modulation signal is usually much higher than the frequency of the picture displayed by the display device, that is, the display device does not synchronize the two, and cannot solve the dynamic afterimage caused by the switching state of the liquid crystal.

Method used

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  • Backlight control module, backlight control method, and liquid crystal display device
  • Backlight control module, backlight control method, and liquid crystal display device
  • Backlight control module, backlight control method, and liquid crystal display device

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Embodiment Construction

[0031] Please refer to figure 1 , figure 1It is a schematic diagram of a backlight control module 10 according to an embodiment of the present invention, which is composed of a backlight calculation unit 100 , a timing control unit 102 and a pulse width modulation unit 104 . The backlight control module 10 is arranged in a display device (such as a liquid crystal display, a liquid crystal TV, an LED liquid crystal display, an LED liquid crystal TV, etc.), and is used to generate at least one pulse width modulation signal to execute at least one display area of ​​a display device respectively. The area backlight control is used to control the enabling time of the backlight of the at least one display area. In detail, the backlight calculation unit 100 is used to set at least one pulse width modulation signal sig_pwm according to the frequency of the frame (ie update frequency) when displaying a frame in at least one area of ​​the at least one display area. Frequency of. The ...

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PUM

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Abstract

A backlight control module comprises a backlight computing unit configuring a frequency of at least one PWM signal according to a frequency of a frame, when at least one area frame of at least one display area is used for displaying the frame; a timing control unit configuring at least one starting time instant of a period of the at least one PWM signal according to at least one starting time instant of the at least one area frame, respectively; and a PWM unit generating the at least one PWM signal, and configuring at least one width of at least one on-period of the period of the at least one PWM signal according to at least one image data of the at least one area frame, respectively, wherein the at least one on-period is located at an end of the period of the at least one PWM signal, respectively.

Description

technical field [0001] The present invention refers to a backlight control module, a backlight control method and a liquid crystal display device, in particular to a backlight control module and a backlight control method capable of performing regional backlight control on at least one display region of a display device. Background technique [0002] With the growing maturity of backlight area control (local dimming) technology, more and more display devices (such as LCD monitors, LCD TVs, LED LCD monitors, LED LCD TVs, etc.) have built-in backlight area control. or total darkness, saving power consumption, reducing light leakage and increasing dynamic contrast. In detail, backlight region control refers to firstly dividing the display device into multiple display regions, and then adjusting the brightness and darkness of the backlights in the display regions respectively according to the brightness and darkness of the regional pictures in each display region. For example, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/34G09G3/36
CPCH05B37/02G09G3/3426
Inventor 高盟超沈自强林慧珍
Owner WISTRON CORP
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