Level generating circuit of display device

A technology for generating circuits and display devices, applied to static indicators, instruments, etc., can solve problems such as the failure of subsequent circuits to ensure normal operation

Active Publication Date: 2018-05-04
KUSN INFOVISION OPTOELECTRONICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the input voltage is lower than a certain value, the chip does not work and is in a protection state: and when some chips with protection functions ca

Method used

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  • Level generating circuit of display device
  • Level generating circuit of display device
  • Level generating circuit of display device

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[0023] Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings. In the various drawings, the same elements are represented by similar reference numerals. For the sake of clarity, the various parts in the drawings are not drawn to scale. In addition, some well-known parts may not be shown.

[0024] In the following, many specific details of the present invention are described, such as the structure, materials, dimensions, processing technology and technology of the device, in order to understand the present invention more clearly. However, as those skilled in the art can understand, the present invention may not be implemented according to these specific details.

[0025] The present invention can be presented in various forms, some of which will be described below.

[0026] image 3 The schematic diagram showing the structure of the level generating circuit of the display device of the present invention. The level generating...

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Abstract

The invention discloses a level generating circuit of a display device. The level generating circuit comprises a power supply module, a first reference voltage generating module, a second reference voltage generating module, a driving voltage generating module and a first capacitor, wherein the power supply module is used for generating first power supply voltage and second power supply voltage; the first reference voltage generating module is used for generating first reference voltage according to the second power supply voltage; the second reference voltage generating module is used for generating second reference voltage according to the first power supply voltage; the driving voltage generating module is used for generating first driving voltage and second driving voltage according tothe first power supply voltage, and the first driving voltage and the second driving voltage provide working voltage needed by a post-stage circuit; the first capacitor is connected between the output end of the first reference voltage generating module and the output end of the second reference voltage generating module, so that the first reference voltage is smaller than the second reference voltage. According to the level generating circuit disclosed by the invention, the normal operation of the post-stage circuit can be guaranteed.

Description

technical field [0001] The present invention relates to the technical field of liquid crystal display, and more specifically, relates to a level generating circuit of TFT liquid crystal display. Background technique [0002] TFT-LCD (Amorphous Silicon Thin Film Transistor Liquid Crystal Display Panel) is more and more widely used in daily life due to its mature technology, and further attention has been paid to the stability of the driving voltage of the LCD. In the actual test, the turn-on voltage VGH of the thin film transistor loses power too quickly or slowly during the power-down process, which will cause the downstream circuit to fail to work normally. During the power-off process, the turn-on voltage VGH of the thin-film transistor drops too quickly, resulting in an under-voltage lockout, and the power supply cannot provide the working voltage required by the subsequent stage circuit, causing the latter stage circuit to fail to work normally. During the power-off pro...

Claims

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Application Information

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IPC IPC(8): G09G3/36
CPCG09G3/3696
Inventor 王月韩小伟
Owner KUSN INFOVISION OPTOELECTRONICS
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