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Control method, control device and display device of backlight drive

A display device and technology to be displayed, applied in static indicators, instruments, etc., can solve the problems that the backlight LED luminous quantity cannot reach the maximum level, the contrast and brightness cannot reach a higher level, and can reduce the number, avoid lifespan and reliability. , the effect of reducing the duration and frequency

Active Publication Date: 2013-11-27
HISENSE VISUAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Existing solutions do not take into account the fact that very few images with the highest brightness are used in the image screen, so that the energy saving of the display screen and the reduction of the backlight LED (light-emitting diode) light emission cannot be maximized in the design, and the contrast and brightness cannot be achieved.

Method used

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  • Control method, control device and display device of backlight drive
  • Control method, control device and display device of backlight drive
  • Control method, control device and display device of backlight drive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Embodiment 1, a backlight driving control method, applied in a display device including a backlight source; figure 2 As shown, the method includes:

[0070] Receive the gray scale of each pixel of the image to be displayed;

[0071] Calculate the grayscale value of the image to be displayed;

[0072] Determine the backlight current value according to the grayscale value of the image to be displayed, and when the grayscale value of the image to be displayed is greater than a first preset threshold, the backlight current value is greater than the rated operating current value of the backlight source;

[0073] The driving of the backlight is controlled according to the determined backlight current value.

[0074] In this embodiment, the backlight source may be, but not limited to, an LED lamp; the grayscale value of the image to be displayed may be the average value of the grayscale values ​​of each pixel in the image frame, or the grayscale value of all pixels. The su...

Embodiment 2

[0104] Embodiment 2, a backlight drive control device, comprising:

[0105] The data receiving circuit is used to receive the gray scale of each pixel of the image to be displayed;

[0106] A data processing circuit, configured to calculate the grayscale value of the image to be displayed, determine the backlight current value according to the grayscale value of the image to be displayed, and when the grayscale value of the image to be displayed is greater than a first preset threshold, the The backlight current value is greater than the rated operating current value of the backlight source;

[0107] The control circuit is used for controlling the driving of the backlight source according to the determined backlight current value.

[0108] In an implementation manner of this embodiment, the first preset threshold may be, but not limited to, 220 gray levels; in other implementation manners, it may also be set to other values ​​according to requirements or test results.

[010...

Embodiment 3

[0130] Embodiment 3, a display device, including the backlight drive control device in any of the schemes of Embodiment 2, may also include a drive circuit connected to the control circuit in the backlight drive control device, and a backlight source connected to the drive circuit .

[0131] In an implementation manner of this embodiment, the backlight driving control device may be integrated on a TCON (Timing Controller, a printed circuit board required by a liquid crystal panel).

[0132] An example of this embodiment is Figure 7As shown, the backlight drive control device includes a data receiving circuit, a data processing circuit, a control circuit, and a correction circuit; the correction circuit includes an image Gamma value processing circuit, a digital gray scale adjustment circuit, a data output and a drive control signal output circuit; The data processing circuit includes a statistical unit, a comparator, and a dynamic processor, and the display device also inclu...

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Abstract

The invention discloses a control method, a control device and a display device of a backlight drive. The control method is applied to the display device comprising a backlight source and comprises the steps of receiving a gray scale of each pixel point of a to-be-displayed image; calculating a gray scale value of the to-be-displayed image; determining a backlight current value according to the gray scale value of the to-be-displayed image, wherein the backlight current value is larger than a rated working current value of the backlight source when the gray scale value of the to-be-displayed image is larger than a first preset threshold value; controlling the driving of the backlight source according to the determined backlight current value. According to the control method, the control device and the display device, which are disclosed by the invention, the luminous quantity of the backlight source can be increased, and the hardware cost can be reduced.

Description

technical field [0001] The invention relates to the field of liquid crystal display, in particular to a backlight driving control method, a control device and a display device. Background technique [0002] The traditional backlight method is to provide a stable and fixed backlight brightness regardless of changes in input image data or peripheral light. The disadvantage of the fixed backlight is that the power consumption of the backlight is large, the contrast is small, and there will be different degrees of light leakage when displaying a black screen, which will affect the subjective effect. In order to increase contrast, the industry has begun to adopt dynamic backlight technology, which dynamically or adaptively adjusts the brightness of the overall or specific part of the backlight according to the distribution of image data or surrounding light. For example, when a bright picture is displayed, the backlight outputs high brightness; when a dark image is displayed, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36G09G3/34
Inventor 黄顺明张钰枫
Owner HISENSE VISUAL TECH CO LTD
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