Driving circuit and liquid crystal display device
A driving circuit and liquid crystal display panel technology, which is applied in the direction of output power conversion device, electrical components, and adjustment of electrical variables, etc., can solve the problems that cannot meet the requirements of use, and achieve the effect of improving capacity and reducing output voltage
Active Publication Date: 2018-02-23
TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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Problems solved by technology
[0003] In an ideal state, the relationship between the input voltage VAA and the output voltage VGH is: VGHF=VAA+2*V1, it can be known that the output voltage VGH is fixed and cannot meet the requirements of use
Method used
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[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0021] It should be noted that the terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. As used in the embodiments of the present invention and the appended claims, the singular forms "a", "said" and "the" are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" a...
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The invention discloses a driving circuit and a liquid crystal display device. The drive circuit includes: a first diode, a second diode, a third diode, a fourth diode, a first capacitor, a second capacitor and an adjustable voltage source, wherein the first diode The anode of the first diode is used for the input voltage, the cathode of the first diode is connected to the anode of the second diode, the cathode of the second diode is connected to the anode of the third diode, and the cathode of the third diode is connected to the fourth and second The anode of the pole tube, the cathode of the fourth diode is used for output voltage, the first end of the first capacitor is connected to the common end of the first diode and the second diode, and the second end of the first capacitor is connected to the adjustable The output terminal of the voltage source and the selection terminal of the adjustable voltage source are used to input a selection voltage; when the input voltage is constant, the output voltages are different when the selection voltage is different. The above method can provide a variety of output voltages to meet user requirements.
Description
technical field [0001] The invention relates to the field of liquid crystal display, in particular to a driving circuit and a liquid crystal display device. Background technique [0002] like figure 1 As shown, the prior art provides a driving circuit, including a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a first capacitor C1, a second capacitor C2, the third capacitor C3, the fourth capacitor C4 and the input voltage source V1. Wherein, the anode of the first diode D1 is used for the input voltage VAA, the cathode of the first diode D1 is connected to the anode of the second diode D2, and the cathode of the second diode D2 is connected to the third diode D3. anode, the cathode of the third diode D3 is connected to the anode of the fourth diode D4, the cathode of the fourth diode D4 is used for the output voltage VGH, and the first end of the first capacitor C1 is connected to the first diode D1 and The common end of the second diode D2, the ...
Claims
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IPC IPC(8): G09G3/36H02M3/155
CPCG09G3/3674G09G3/3696G09G3/3677
Inventor 张先明曹丹
Owner TCL CHINA STAR OPTOELECTRONICS TECH CO LTD