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Pulse generation circuit and display device capable of regulating picture displaying brightness

A technology for generating circuits and displaying brightness, applied to static indicators, instruments, etc., can solve problems such as low maximum brightness and reduced brightness of LCD display, to reduce differences, improve display brightness, and solve whitening and gray scale in large viewing angles reverse effect

Active Publication Date: 2009-09-23
AU OPTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the liquid crystal display using AMVA technology displays the maximum brightness (that is, the maximum gray scale value of the screen is 255), its internal circuit design will cause the display brightness of the liquid crystal display to decrease, and the maximum brightness it can display is lower than that of the used The maximum brightness that the MVA technology LCD can display

Method used

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  • Pulse generation circuit and display device capable of regulating picture displaying brightness

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Embodiment Construction

[0032] After referring to the accompanying drawings and the implementation methods described later, those skilled in the art can understand other objectives of the present invention, as well as the technical means and implementation methods of the present invention.

[0033] The first embodiment of the present invention is as figure 1 As shown, a display device 1 includes a display panel 101 , a gate driving circuit 103 , a source driving circuit 105 , a pulse generating circuit 107 and a source controller 109 . When the display panel 101 intends to display a picture of a video signal 100 , the display panel 101 needs to be driven by the gate driving circuit 103 and the source driving circuit 105 . The source driving circuit 105 receives the source signal 102 generated by the source controller 109 after processing the video signal 100 to work. The display panel 101 may be a liquid crystal display (liquid crystal display; LCD) array or other types of display arrays.

[0034] ...

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Abstract

The invention provides a pulse generating circuit and a display device capable of adjusting display brightness of a picture. The display device includes a display panel, a gate driving circuit and a pulse generating circuit, the display panel is used to display a picture, the gate driving circuit drives the display panel according to a pulse signal generated by the pulse generating circuit, and the pulse The generation circuit includes a histogram analysis unit and a grid pulse modulator, the histogram analysis unit is used to calculate the gray scale ratio value of the picture, and compare the gray scale ratio value with a critical value, and then generate a control signal, The duty time of the pulse signal varies in response to the control signal. In this way, the difference between the images seen by the user when looking straight ahead and at large viewing angles is reduced, the problems of whitening and grayscale inversion at large viewing angles are solved, and the image quality is effectively improved when displaying images with a large proportion of high grayscale values. Display brightness.

Description

technical field [0001] The present invention relates to a pulse generation circuit and a display device capable of adjusting display brightness of a picture; in particular, it relates to a pulse generation circuit and a display device capable of calculating the grayscale value distribution of a picture to adjust the display brightness of the picture. Background technique [0002] With the advancement of science and technology, various electronic products have become an indispensable part of people's life. Among them, the display is an important component of multimedia electronic products. The thin film transistor liquid crystal display (thin filmtransistor liquid crystal display, TFT LCD) has the advantages of power saving, no radiation, small size, low power consumption, no space, right-angle plane, high resolution, stable image quality, etc., and has gradually replaced A traditional cathode ray tube display (cathode ray tube display, CRT display) is widely used in display...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36G09G3/20
Inventor 侯鸿龙黄乙白廖上嘉曹正翰张庭瑞谢曜任
Owner AU OPTRONICS CORP