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Automatic regulating method of display brightness and contrast

An automatic adjustment and display technology, applied in static indicators, cathode ray tube indicators, instruments, etc., can solve the problems of lack, inability to interfere, suppress, and control circuit malfunction, and achieve the effect of eliminating discomfort and suppressing adverse effects.

Inactive Publication Date: 2008-07-09
刘歌群
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As we all know, the delay method is not an ideal interference elimination method, because when the disturbance period is synchronized with the delay time, the interference cannot be effectively suppressed
For example, when there is a fan in the room that will affect the ambient brightness around the display, if the rotation cycle of the fan blades is synchronized with the delay time, the control circuit will malfunction
To sum up, the existing technology does not effectively solve the problem of tracking display parameters to ambient light changes, and also lacks a better solution to achieve the best display brightness and contrast adjustment through joint adjustment while eliminating ambient light disturbances. good display effect

Method used

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  • Automatic regulating method of display brightness and contrast
  • Automatic regulating method of display brightness and contrast

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Embodiment Construction

[0015] In the embodiment shown in Fig. 2 and Fig. 4, the foreground brightness sensor (1) is installed on the upper edge of the display front, the background brightness sensor (2) is installed on the upper edge of the display back, and the photosensitive sensor is a photoresistor. The photoresistor is connected to the brightness measurement circuit, and the output signal of the measurement circuit is converted into a digital quantity by the analog-to-digital conversion port of the CPU after passing through the signal conditioning circuit, and the microprocessor performs filtering and calculation of the optimum brightness and optimum contrast. The cut-off frequencies of the two digital low-pass filters are both 0.5 Hz, and the optimum brightness function and the optimum contrast function of the display are respectively a two-dimensional number table. The calculated current optimum brightness and current optimum contrast are respectively input to the brightness control circuit an...

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Abstract

This invention relates to an automatic adjusting method for brightness and contrast of displays, which first of all sets up the corresponding relation functions f1(x,y) and f2(x,y) of the most suitable brightness b and the most suitable contrast c with the foreground brightness x and background light brightness y of a display, then two photosensitive sensors set at the front and back of the display test the foreground and background brightness to get a test value to be filtered by two digital low pass filters to get the current most suitable display brightness and contrast by the corresponding relation function to regulate the display parameter of the display.

Description

technical field [0001] The invention relates to a method for automatically adjusting the brightness and contrast of a display, in particular to a method capable of automatically adjusting the brightness and contrast of the display according to the brightness of the foreground environment and the brightness of the background environment of the display. Background technique [0002] The display is a light-emitting device. When people recognize text and graphic images on the display screen, the ambient light will have a non-negligible impact on the display effect. In severe cases, it will make people's recognition difficult and vision loss. On the one hand, when people look at the display, the main part of the line of sight (7) is concentrated on the display screen (5), but the afterglow (8) is in an oval area on the background (9) around the display (as shown in Figure 1 ), so there are two ways for ambient light to affect the display: one is as foreground light (10) irradiati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G5/10G09G5/00
Inventor 刘歌群
Owner 刘歌群
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