Voltage stabilizing circuit and display device
A voltage-stabilizing circuit and resistance technology, applied in the direction of regulating electrical variables, control/regulating systems, instruments, etc., can solve the problems of low stability of the output driving voltage of the voltage-stabilizing circuit and the inability to adjust the driving voltage flexibly, and achieve a simple structure, Improved stability, convenient and flexible adjustment
Inactive Publication Date: 2015-04-01
BOE TECH GRP CO LTD +1
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[0004] The main purpose of the present invention is to provide a voltage stabilizing circuit and a display device to solve the problem in the prior art that the stability of the output driving voltage of the voltage stabilizing circuit is low and the output driving voltage cannot be flexibly adjusted
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[0028] 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 making creative efforts belong to the protection scope of the present invention.
[0029] Such as figure 2 As shown, the voltage stabilizing circuit described in the embodiment of the present invention includes an input terminal IN, a driving voltage output terminal OUT, a sampling unit 11, a reference voltage supply unit 12, a comparison and amplification unit 13 and an adjustment unit 14, wherein,
[0030] The sampling unit 11 is connected to the driving voltage output terminal OUT, and is used to sample the driving voltage according to a...
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The invention provides a voltage stabilizing circuit and a display device. The voltage stabilizing circuit comprises an input end, a driving voltage output end, a sampling unit, a reference voltage supplying unit, a comparing amplifying unit and an adjusting unit; the sampling unit is connected with the driving voltage output end and used for sampling in preset voltage distribution proportion and driving voltage as well as transmitting the obtained error voltage to the comparing amplifying unit; the reference voltage supply unit is used for supplying reference voltage to the comparing amplifying unit; the comparing amplifying unit is used for amplifying the difference between the error voltage and the reference voltage so as to obtain adjusting voltage; the adjusting unit is connected with the input end and used for adjusting the driving current which is output to the driving voltage output end according to the adjusting voltage so as to adjust the driving voltage. The voltage stabilizing circuit is simple in structure, high in stability, convenient and flexible to adjust output voltage, and suitable for different requirements of various circuits on driving voltage.
Description
technical field [0001] The invention relates to the field of display technology, in particular to a voltage stabilizing circuit and a display device. Background technique [0002] At present, liquid crystal display panels are increasingly entering people's lives due to their lightness, ultra-thinness, multi-color and high-definition features. However, as the requirements for resolution and pixel quality are getting higher and higher, the requirements for the stability of the driving voltage are also getting higher and higher. [0003] Such as figure 1 As shown, the existing voltage stabilizing circuit that provides driving voltage for the liquid crystal display panel includes a first capacitor C1, a first resistor R1, a first triode VT1, a Zener diode DZ and a second resistor R2, and the input of the voltage stabilizing circuit The voltage Ui is converted into a driving voltage Uo through the voltage stabilizing circuit. However, the existing voltage stabilizing circuit f...
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IPC IPC(8): G05F1/56
Inventor 刘宝玉孙志华李承珉
Owner BOE TECH GRP CO LTD