Voltage detection circuit, display device and display driving method thereof

A technology of voltage detection and display device, applied in static indicators, instruments, etc., can solve the problems of increased production cost and no voltage at the end of the voltage line, and achieve the effect of solving the problem of voltage drop

Active Publication Date: 2021-06-22
SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The embodiment of the present invention provides a voltage detection circuit, which is used to solve the problem that in the display device of the prior art, there is not enough voltage at the end of the remote voltage line because the voltage line of the remote chip-on-film is too long and there is a voltage drop. , resulting in the need to set two sets of voltages for power supply, leading to technical problems of increased production costs

Method used

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  • Voltage detection circuit, display device and display driving method thereof
  • Voltage detection circuit, display device and display driving method thereof
  • Voltage detection circuit, display device and display driving method thereof

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Embodiment Construction

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. In the drawings, for clarity and ease of understanding and description, the dimensions of the components shown in the drawings are not in scale.

[0021] Such as figure 2 As shown, it is a circuit diagram of a voltage detection circuit provided by an embodiment of the present invention. The voltage detection circuit 50 includes: a voltage dividing circuit unit 501 , a detection circuit unit 502 and a switch circuit unit 503 .

[0022] The input terminal Vin of the voltage divider circuit unit 501 is electrically connected to the power management chip 40 of the display device (such as image 3 ), the voltage divider circuit unit 501 is used to divide the voltage output by the power management chip 40 to obtain the detection voltage Vdet, and the output terminal of the voltage d...

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Abstract

The invention provides a voltage detection circuit, a display device and a display driving method thereof. The voltage detection circuit comprises a voltage division circuit unit, a detection circuit unit and a switching circuit unit. The voltage division circuit unit is used for dividing the voltage output by the power management chip to obtain detection voltage; the detection circuit unit is used for comparing a detection voltage with a reference voltage and outputting a control signal; the enabling control end of the switching circuit unit is electrically connected to the output end of the detection circuit unit, wherein the enabling control end controls the input end of the switching circuit unit to be connected with the first output end or the second output end according to a control signal output by the detection circuit unit. According to the invention, the problem of voltage drop caused by an overlong voltage line of the chip on film is solved by arranging a group of relatively high voltage and the voltage detection circuit.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a voltage detection circuit, a display device and a display driving method thereof. Background technique [0002] As the size of the display panel becomes larger, the size of the XB (X Board, conversion board) required is also larger, and the conversion board is connected to the display panel through a COF (Chip On Film, chip-on-film). Such as figure 1 Shown is a schematic diagram of the basic structure of a display device in the prior art. Taking a 65-inch display panel as an example, one display panel 10 corresponds to four conversion plates 30 , and each conversion plate 30 corresponds to three chip-on-chip films 20 . Wherein, each chip-on-film 20 needs the power management chip 40 to provide the voltage of VDD1V8 (1.8 volts), because the length of the voltage line of the chip-on-film 20 near the edge region (far end) of the display panel 10 is relatively close to the length...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/00G09G3/20
CPCG09G3/006G09G3/20
Inventor 张先明
Owner SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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