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Backlight power supply device

A technology of power supply device and backlight source, applied in the direction of instruments, static indicators, etc., can solve the problem of not being able to adjust the brightness of the backlight source in different regions, and achieve the effect of avoiding screen flicker.

Active Publication Date: 2019-06-28
SHENZHEN SKYWORTH RGB ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, in most liquid crystal display devices, the power supply device of the backlight cannot adjust the brightness of the backlight in different regions, that is, the luminance of the backlight in any region is the same.

Method used

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Embodiment Construction

[0032] 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, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.

[0033] figure 1 It is a schematic structural diagram of a power supply device for a backlight provided by an embodiment of the present invention. see figure 1 The power supply device of the backlight includes a control module 11 , a switch module 12 and a boost module 13 . The boost module 13 is electrically connected to the power supply 1 of the display device and the backlight 4 of the display device respectively, and is used to adjust the output voltage of the power supply 1 of the display device to the worki...

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Abstract

The embodiment of the invention discloses a backlight power supply device, including a boost module, a control module and a switch module. The boost module is electrically connected with a power source of the display device and a backlight source of the display device. The voltage regulator is used for regulating voltage output by a power supply of the display device to working voltage of a backlight source of the display device. The control module is respectively connected with the boosting module. A backlight source of the display device is electrically connected with a main board of the display device. The control module is used for driving a backlight source of the display device in a regional constant-current manner. The switch module is electrically connected with the boosting module, the control module, a power supply of the display device and a main board of the display device respectively, the switch module is used for controlling the power-on time sequence of the power supplyof the display device to the boosting module and the control module, and the power-on time sequence of the boosting module is earlier than that of the control module. According to the technical scheme provided by the embodiment of the invention, the backlight source area of the display device can be dimmed.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of backlight modules, and in particular, to a power supply device for a backlight source. Background technique [0002] The display panel of the liquid crystal display device does not emit light by itself. Therefore, the liquid crystal display device is provided with a backlight module to provide a light source for it. The luminous state of the backlight source of the backlight module is a key factor affecting the image display of the display panel. [0003] At present, in most liquid crystal display devices, the power supply device of the backlight cannot adjust the brightness of the backlight in different regions, that is, the luminance of the backlight in any region is the same. However, with the improvement of the picture quality requirements and the energy saving requirements of the display device, the power supply device of the backlight needs to perform regional dimming on the ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/34G09G3/36
Inventor 胡向峰鲍晓杰
Owner SHENZHEN SKYWORTH RGB ELECTRONICS CO LTD