Control device and control method for liquid crystal display

A liquid crystal display and control device technology, applied to static indicators, instruments, etc., can solve problems that affect the quality of picture display, lack of synchronization, etc., and achieve the effect of eliminating water ripples

Active Publication Date: 2021-08-06
KUSN INFOVISION OPTOELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the PWM signal output in the dynamic backlight control mode (Dynamic Backlight Control, DBC) or the content-corresponding backlight control (ContentAdaptive Brightness Control, CABC) mode is not synchronized with the gate frame start pulse STV signal output by the timing controller Tcon, Affected the quality of the screen display

Method used

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  • Control device and control method for liquid crystal display
  • Control device and control method for liquid crystal display
  • Control device and control method for liquid crystal display

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Embodiment Construction

[0025] Various embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. In each of the drawings, the same elements are expressed by the same or similar reference numerals. For the sake of clarity, the various parts in the drawings are not drawn.

[0026] The present invention can be presented in various forms, and some examples will be described below.

[0027] figure 2 A structural block diagram of a liquid crystal display according to an embodiment of the present invention is shown; image 3 A structural block diagram of a sequence controller in a liquid crystal display in accordance with an embodiment of the present invention is shown; Figure 4 A timing showing a PWM signal and a STV signal according to an embodiment of the present invention; Figure 5 A flowchart of a control method for a liquid crystal display according to an embodiment of the present invention is shown; Image 6 A flowchart of step S04 in the cont...

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Abstract

The invention discloses a control device for a liquid crystal display, comprising: a signal connector for receiving a video signal and a first pulse width modulation signal; a timing controller for generating a gate drive signal and a source drive signal according to the video signal; The pole driving signal includes a field synchronization signal; wherein, the timing controller is also used to convert the first pulse width modulation signal into a second pulse width modulation signal whose frequency is doubled with the field synchronization signal according to the field synchronization signal. The present invention also provides a control method for a liquid crystal display, which converts the first pulse width modulation signal into a second pulse width modulation signal with a frequency multiplied by the field synchronization signal through a timing controller, and eliminates field synchronization in the narrow viewing angle mode. The water ripple phenomenon is caused by the phase interference between the AC public voltage signal with the same phase of the signal and the backlight PWM signal.

Description

Technical field [0001] The present invention belongs to the field of displays, and more particularly to a control device and a control method for a liquid crystal display. Background technique [0002] LCD Crystal Display, LCDs have a variety of advantages such as thin, energy-saving, and radiation, so it has gradually replaced a conventional cathode ray tube (CRT) display. At present, the liquid crystal displays are widely used in high-definition digital TV, desktop computer, personal digital assistant (PDA), laptop, mobile phone, digital camera and other electronic devices. [0003] figure 1 A structural diagram of a prior art liquid crystal display is shown. like figure 1 As shown, the liquid crystal display includes a display panel 100, a signal connector 210, a timing controller 220, a display driving circuit 230, a backlight circuit 240, and a backlight module 300. Wherein, the signal connector 210 receives the external transmission of video signals and pulse width modulat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36G09G3/34
CPCG09G3/3406G09G3/3696
Inventor 何甲蔡浩许晓飞
Owner KUSN INFOVISION OPTOELECTRONICS
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