Power strip and television
A technology of power board and target voltage, which is applied in the direction of TV, color TV, color TV parts, etc., can solve the problems of input voltage change, increase manpower and financial cost, power board cannot provide multiple output voltages, etc., and achieve high The effect of compatibility
Active Publication Date: 2019-01-04
SHENZHEN SKYWORTH RGB ELECTRONICS CO LTD
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Problems solved by technology
[0004] Therefore, the existing power board design scheme has the following defects: the power board cannot provide a variety of output voltages, and can not only match the BOOST constant current scheme of the constant current board, but also match the BUCK constant current scheme; when the size of the LCD screen changes , the specifications of the corresponding LED backlight module also change, therefore, the input voltage of the constant current board also changes, so the output voltage of the power board needs to be readjusted, that is, the power board needs to be redesigned, and because the power board is For safety devices, every time the power board is redesigned, it needs to re-certify the relevant specifications, which increases the cost of manpower and financial resources
Method used
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Embodiment
[0038] figure 1 This is a schematic structural diagram of a power board provided by an embodiment of the present invention. The power board disclosed in this embodiment can be applied to the field of LED liquid crystal televisions, or other power consumption fields that need to be matched with a constant current board. See for details figure 1 As shown, the power board includes:
[0039] Half-bridge resonant LLC transformer unit 110, control chip 120, output voltage selection unit 130, and rectification unit 140;
[0040] Wherein, the input terminal VIN of the half-bridge resonant LLC transformer unit 110 is connected to an external input power source, the control terminal C is connected to the control chip 120, and the first output terminal VOUT1 of the half-bridge resonant LLC transformer unit 110 is connected to the output voltage selection unit 130. Generating at least three first target voltages under the control of the control chip 120;
[0041] One end of the output voltage ...
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An embodiment of the invention discloses a power strip and a television. The power strip comprises a half-bridge resonance LLC transformer unit, a control chip, an output voltage selection unit and arectification unit; under control of the control chip, the half-bridge resonance LLC transformer unit generates at least three types of first target voltages; the output voltage selection unit selectsone from the at least three types of first target voltages generated by the half-bridge resonance LLC transformer unit, and outputs the selected first target voltage to the rectification unit; the rectification unit receives the first target voltage via the output voltage selection unit, rectifies the received first target voltage, and outputs the rectified first target voltage; and values of theat least three types of first target voltages are different from one another. The power panel can provide different types of output voltages, and mach different constant current boards, and is higherin compatibility.
Description
Technical field [0001] The embodiment of the present invention relates to the technical field of LED TV power supplies, in particular to a power supply board and a TV. Background technique [0002] With the rapid development of LED (Light Emitting Diode, Light Emitting Diode) LCD TVs, at present, LED LCD TVs have spread to thousands of households. [0003] Existing LED LCD TVs adopt the design method of power board + constant current board. Among them, the power board is responsible for providing suitable input voltage for the constant current board and the TV main board, and the constant current board is responsible for providing constant current for the LED backlight module. The constant current board usually adopts BOOST constant current solution or BUCK constant current solution. When the specifications of the LED backlight module are determined, the input voltage of the constant current board that matches the LED backlight module, that is, the output voltage of the power boar...
Claims
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IPC IPC(8): H04N5/63
CPCH04N5/63
Inventor 胡向峰沈思宽盘桥富鲍晓杰
Owner SHENZHEN SKYWORTH RGB ELECTRONICS CO LTD