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Power control method for LED backlight and LED display

A technology of LED display and power control, applied in static indicators, computer control, general control system, etc., can solve the problems of high power consumption of LED power and low display contrast of display, achieve high contrast and avoid the effect of color shift

Inactive Publication Date: 2009-02-04
SHENZHEN TCL IND RES INST
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Problems solved by technology

[0004] The purpose of the embodiments of the present invention is to provide a power control method for LED backlight, aiming at solving the problems of low display contrast and large LED power consumption in the prior art

Method used

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  • Power control method for LED backlight and LED display
  • Power control method for LED backlight and LED display
  • Power control method for LED backlight and LED display

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Embodiment Construction

[0022] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0023] In the embodiment of the present invention, the power attenuation coefficient is determined according to the power representative value of each LED, so that the power consumption of the LED can be controlled according to the data value related to the attenuation coefficient attenuation, thereby avoiding the phenomenon of color shift in the display screen, which is presented to The user continues to have a high-definition display screen.

[0024] figure 1 The flow of the power control implementation method provided by the embodiment of the present invention is shown, and the detailed step...

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Abstract

The invention provides a LED backlighting power control method and the LED display thereof and is suitable for the LCD field. The method includes steps as following: the power representative value of the LED power supply can be calculated; the power attenuation coefficient can be calculated according to the power representative value; and the power dissipation of attenuation LED power supply can be controlled according to the power attenuation coefficient. In the embodiment of the invention, the power attenuation coefficient can be identified according to the power representative value of each LED, furthermore, LED power consumption can be controlled according to the data value correlative to attenuation coefficient; thereby avoiding the color error phenomenon caused by display pictures, presenting continuous display pictures with high definition and high contrast degree.

Description

technical field [0001] The invention belongs to the field of liquid crystal display, and in particular relates to a method for controlling power of an LED backlight and an LED display. Background technique [0002] In the prior art, light-emitting diodes (Light Emitting Diode, LED) are used as the backlight source of liquid crystal display (Liquid Crystal Display, LCD) TV, and LEDs with three primary colors of red, green and blue are generally used to form an array direct backlight. The brightness is driven by pulse width modulation (PulseWidth Modulation, PWM). The use of LED backlight can improve the color gamut, realize mercury-free environmental protection, and can achieve a high contrast ratio of more than 10000:1 through partition backlight control, and can reduce power consumption. [0003] Due to the relatively low luminous efficiency of LEDs, all LEDs on the backlight panel work at rated luminance, and their power consumption will be double that of the backlight of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02G02F1/13357G09F9/33G05B15/02G02F1/1335G09G3/34
Inventor 邵诗强
Owner SHENZHEN TCL IND RES INST
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