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Display device and power supply circuit

A technology of a display device and a power supply circuit, which is applied in the electronic field, can solve the problems of large area, large voltage stress, and high cost of the power supply circuit, and achieves the effect of reducing cost and area

Active Publication Date: 2021-09-24
HISENSE VISUAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] With the existing technology, the voltage stress of the voltage adjustment module provided for at least one LED light bar in the power supply circuit is relatively large, which causes the voltage adjustment module to occupy a relatively large area of ​​the printed circuit board (PCB) where the power supply circuit is located. large, making the cost of the power supply circuit higher

Method used

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  • Display device and power supply circuit

Examples

Experimental program
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Effect test

Embodiment 1

[0072] Figure 5 A schematic structural diagram of a power supply circuit of a display device provided in Embodiment 1 of the present application, wherein the power supply circuit can be applied in such as Figure 1-3 In any of the display devices, such as Figure 5 As shown, the power supply circuit provided by this embodiment includes: a power supply 11 , a filter and rectifier module 12 , a PFC module 13 , an LLC module 14 and a load. Wherein, the load includes at least the main board 18 and the multi-channel LED light bar shown in the figure.

[0073] Specifically, after the LLC module 14 of the power supply circuit provided in this embodiment receives the DC voltage sent by the PFC module 13 through the primary winding 141, different secondary windings output different voltages according to the voltage of the primary winding 141 to supply power to different loads. For example, the secondary winding 144 supplies a voltage of 12V to the motherboard 18 according to the vol...

Embodiment 2

[0083] Image 6 A schematic structural diagram of a power supply circuit of a display device provided in Embodiment 2 of the present application, wherein the power supply circuit can be applied in such as Figure 1-3 In any of the display devices, such as Image 6 The power supply circuit shown with Figure 5 The power supply circuits shown all adopt the idea of ​​setting two different voltages output by two different secondary windings respectively, and the voltage adjustment module only needs to adjust the output voltage of the secondary winding with a smaller voltage. The only difference is that, Image 6 In the shown embodiment, the power supply circuit adopts a single flyback structure, and the first secondary winding and the second secondary winding are set to output voltage through the primary winding in the single flyback structure, while Figure 5 The first secondary winding and the second secondary winding set in the illustrated embodiment are based on the output ...

Embodiment 3

[0085] Figure 7 A schematic structural diagram of a power supply circuit of a display device provided in Embodiment 3 of the present application, wherein the power supply circuit can also be applied in such as Figure 1-3 In any one of the display devices, such as Figure 7 In the power supply circuit shown, the Figure 5 On the basis of the power supply circuit shown, connect the output terminal of the first secondary winding to the input terminal of the second secondary winding, and supply power to multiple LED strips through the output terminal of the second secondary winding. At this time, for the voltage The output voltage of the first secondary winding adjusted by the adjustment module, its input terminal is grounded instead of floating, so in Figure 7 In the illustrated embodiment, the optocoupler may not be provided to perform optocoupler isolation for the feedback signal.

[0086] Specifically, such as Figure 7 The LLC module of the power supply circuit shown i...

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Abstract

The invention provides a display device and a power supply circuit, the power supply circuit in the display device can output two different voltages respectively by flexibly setting two different secondary windings, and a voltage adjusting module only needs to adjust the voltage output by one secondary winding with the smaller voltage, so the requirement for the voltage withstanding value of elements such as a switching tube and a capacitor in the voltage adjusting module is lowered, the area of a PCB where the power supply circuit is located is reduced, and finally the cost of the power supply circuit in the display device can be lowered.

Description

[0001] This application claims the priority of the Chinese patent application with the application number 202010192086.8 and the application name "display device and power supply circuit" submitted to the China Patent Office on March 18, 2020, the entire content of which is incorporated in this application by reference. technical field [0002] The present application relates to the field of electronic technology, in particular to a display device and a power supply circuit. Background technique [0003] At present, with the development of electronic technology, the integration degree of electronic equipment including display devices such as televisions is getting higher and higher, and higher and higher requirements are put forward for the power supply of the display devices. At present, after most display devices receive AC power from the mains through a plug, a special power supply circuit is used to convert the AC power to DC and transform the voltage to supply power to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32H02M3/335
CPCG09G3/32H02M3/33523
Inventor 庞震华
Owner HISENSE VISUAL TECH CO LTD
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