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Hybrid LED (light-emitting diode) backlight source drive method

A technology of LED backlight source and driving method, applied in instruments, static indicators, etc., can solve the problems of poor white brightness uniformity, high cost, low cost, etc.

Inactive Publication Date: 2011-07-27
IRICO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The feature of edge-lit LED backlight is that the backlight can be made thinner and the cost is low, but the brightness uniformity of the white field is poor
The direct type LED backlight is characterized by good brightness uniformity in the white field, and dynamic dimming can be performed by partition, but the backlight cannot be made thin and the cost is high

Method used

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  • Hybrid LED (light-emitting diode) backlight source drive method
  • Hybrid LED (light-emitting diode) backlight source drive method

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Embodiment Construction

[0013] Such as figure 1 As shown, the device of the present invention includes an LED backlight frame 11 , an LED light bar 12 , and a light guide plate 13 .

[0014] Such as figure 2 As shown, the hybrid LED backlight driving method includes a video signal input unit 21 , an LED backlight control board 22 , an LED backlight driving board 23 , and an LED backlight device 24 .

[0015] The specific implementation steps of the hybrid LED backlight driving method are as follows:

[0016] 1. According to the physical resolution of the LCD screen and actual needs, divide the entire LCD screen into M times N areas, for example, a screen with a resolution of 1920 x 1080 can be divided into 4 times 3 areas according to the cost and display effect requirements .

[0017] 2. The LED backlight device 24 is divided into corresponding M times N areas according to the division method of the liquid crystal screen, and each area is equivalent to an edge-lit LED backlight unit. figure 1 T...

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Abstract

The invention discloses a hybrid LED (light-emitting diode) backlight source drive method. In the drive method, MXN regions are divided in a row-column way according to the physical distinguishability and display effect of a liquid crystal display screen firstly; a whole LED (light-emitting diode) backlight source is divided into corresponding MXN regions according to the division way of the liquid crystal display; then which region in the MXN regions an inputted video signal belongs to is judged; and the maximum value of each region is respectively calculated dynamically; finally the MXN values obtained through dynamic statistics are sent to a drive board of the LED (light-emitting diode) backlight source; and the drive board respectively drives each LED (light-emitting diode) backlight source region. The hybrid LED (light-emitting diode) backlight source drive method has simple drive method, low realization cost as well as light and thin structure. A direct type LED (light-emitting diode) backlight source drive method has the characteristics of implementing zoning dynamic statistics and having good brightness uniformity.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display backlight sources, in particular to a driving method for a hybrid LED backlight source. Background technique [0002] LCD display technology, as a non-self-illuminating display technology, needs a backlight source to realize the display function. With the continuous development of liquid crystal display technology, the application fields of liquid crystal displays, especially color liquid crystal displays, are also constantly expanding. Driven by the liquid crystal display market, the backlight industry is also showing prosperity. As a kind of backlight with development potential, LED backlight has great research value and significance. [0003] LED backlights are generally divided into two types according to the position of the light source, one is side-lit LED backlight, and the other is direct-lit LED backlight. The feature of edge-lit LED backlight is that the backlight can b...

Claims

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Application Information

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IPC IPC(8): G09G3/34G09G3/36
Inventor 李兵
Owner IRICO
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