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Power supply circuit and LCD TV

A technology for power supply circuits and LCD TVs, which can be used in TVs, color TVs, high-efficiency power electronics conversion, etc., and can solve the problem of multiple devices

Active Publication Date: 2015-08-26
HISENSE VISUAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the drive circuit part needs a special drive chip to cooperate with the Boost topology peripheral circuit, and there are many components

Method used

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  • Power supply circuit and LCD TV
  • Power supply circuit and LCD TV
  • Power supply circuit and LCD TV

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Embodiment Construction

[0021] In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0022] In the following description, many specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described here, therefore, the present invention is not limited to the specific embodiments disclosed below limit.

[0023] figure 2 A block diagram of a power supply circuit according to an embodiment of the invention is shown.

[0024] Such as figure 2 As shown, the power supply circuit 200 according to the embodiment of the present invention incl...

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Abstract

The invention provides a power supply circuit. The power supply circuit comprises a resonance control circuit, an isolation driving circuit, a first output circuit and a second output circuit, wherein the resonance control circuit receives first direct current from exterior and a driving signal from the isolation driving circuit, and respectively outputs second current to the first output circuit and the second output circuit according to the driving signal and the first direct current; and the isolation driving circuit is connected to the resonance control circuit and is used for outputting the driving signal to the resonance control circuit. The invention also provides a liquid crystal television. According to a technical scheme of the invention, a high-power LED (light-emitting diode) backlight source is driven by using a secondary circuit to control a primary resonance circuit, and the power supply for a main board is , controlled and integrated through the feedback of a double loop.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a power supply circuit and a liquid crystal television with the power supply circuit. Background technique [0002] LEDs are used as the backlight of LCD TVs, and there are at least two or more light bars on medium and large-sized LCD TVs. The driving mode of the power supply is to drive one LED light bar with one booster circuit, and realize the equal current of each light bar by sampling the current of each light bar, so as to meet the requirements of TV screen display. Multi-channel light strips generally use low-voltage 24V input. This method generally requires more chips and peripheral components, and the cost is relatively high. Therefore, increasing the number of LED lights for each light bar and reducing the number of light bars is the current trend of LED LCD TV backlighting. [0003] At present, 42-inch and 46-inch LED LCD TVs have two or more street light bars, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335H04N5/63
CPCY02B70/1433Y02B70/10
Inventor 丰明刚迟洪波
Owner HISENSE VISUAL TECH CO LTD
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