Liquid crystal backlight driving current control device

A backlight drive and current control technology, applied in instruments, static indicators, etc., can solve the problems of single implementation scheme and strong dependence, and achieve the effect of realizing switching, reducing requirements, and reducing the requirements of dynamic adjustment speed.

Active Publication Date: 2013-01-02
HISENSE VISUAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The embodiment of the present application provides a liquid crystal backlight driving current control device and method, which solves the technical problem in the prior art that the implementation scheme is single and highly dependent, and realizes that the backlight driving current can be realized without a backlight driving chip. Technical effects of switching and constant functions

Method used

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  • Liquid crystal backlight driving current control device
  • Liquid crystal backlight driving current control device
  • Liquid crystal backlight driving current control device

Examples

Experimental program
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Effect test

Embodiment 1

[0082] The embodiment of the present application provides a device for controlling the driving current of the liquid crystal backlight, such as Figure 4 As shown, the P-MOS tube and the N-MOS tube are used as the first electronic switch and the second electronic switch, and a main circuit module composition diagram of the device is given. Specifically, the liquid crystal backlight in the embodiment of the application Devices for drive current control, including:

[0083] Control unit; including the first control unit CHIP0 and the second control unit CHIP1; CHIP1 receives the display mode switching signal 2D / 3D_In from CHIP0; CHIP1 contains at least two electronic switches: P-MOS tube M1 and N-MOS tube M2, Among them, the source of M1 is connected to the power supply voltage pin VCC of CHIP2, the gate is connected to the control signal N_Control1 inside CHIP1, the drain is connected to the source of M2, the gate of M2 is connected to another control signal N_Control2 inside C...

Embodiment 2

[0101] The embodiment of the present application provides a method for controlling the driving current of the liquid crystal backlight, which is applied to the device for driving the current of the liquid crystal backlight in the above embodiment, see image 3 , the specific steps include:

[0102] S01, receiving a control signal.

[0103] Specifically, it is: the control unit receives a control signal from the main control unit of the whole machine. In the embodiment of the present application, the control signal can be: a signal requesting to switch the display mode, specifically: instructing to switch from 2D display to 3D display Or switch from 3D display to 2D display signal. combine Figure 4 , the first control unit CHIP0 sends a signal 2D / 3D_In to switch the display mode, which is the received control signal.

[0104] S02. Generate a control level based on the control signal.

[0105] Specifically, it is: according to the received control signal for switching the d...

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PUM

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Abstract

The invention discloses a liquid crystal backlight driving current control device which comprises a control unit, a level switch unit and a constant-current unit. The level switch unit is connected with the control unit and used for receiving control levels outputted by the control unit on the basis of acquired control signals and generating a reference level based on the control levels. The constant-current unit is connected with the level switch unit and used for receiving the reference level and generating currents at least including a first current a second current on the basis of the reference level, wherein a first current value of the first current and a second current value of the second current are different current values.

Description

technical field [0001] The invention relates to the field of liquid crystal display, in particular to the field of liquid crystal backlight driving current control. Background technique [0002] 3D (D: Dimension, the meaning of line and dimension) display, as an emerging display method, is favored by consumers because it is more three-dimensional and realistic than ordinary 2D display, allowing the audience to feel immersive. gaze. [0003] Most of the TV programs played by the current cable TV stations are still 2D pictures, and there are relatively few 3D pictures. If you want to watch 3D pictures, you need to convert the 2D pictures transmitted by the TV station into 3D pictures for display. Therefore, consumers have higher and higher requirements for LCD TVs, hoping to buy an LCD TV that can watch both 2D and 3D images. Therefore, LCD TV manufacturers try their best to develop 2D and 3D convertible LCD TVs. So that buyers can switch display modes according to their own...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/34G09G3/36
Inventor 孟现策迟洪波辛晓光徐爱臣
Owner HISENSE VISUAL TECH CO LTD
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