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Method for computing driving current of light source of screen

A technology of driving current and light source, applied in the direction of instruments, static indicators, etc., can solve the problems of drop, inability to accurately adjust the brightness of the user's light, etc.

Inactive Publication Date: 2008-12-31
BENQ CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the light emitted by cold cathode lamps needs to pass through components such as backlight modules, brightness enhancement films, and polarizers installed inside the display panel to perform brightness uniformity and brightness enhancement, so that the display panel can emit light uniformly and have sufficient brightness. To display information, therefore, there is a certain degree of gap between the light brightness of the cold cathode lamp detected by the light sensor and the actual light output brightness of the display panel. It can be seen that although the light sensor buried at the cold cathode lamp It can directly reflect the brightness of the light emitted by the cold cathode lamp, but it is not the actual brightness of the display panel, so this method cannot accurately adjust the brightness of the light viewed by the user

Method used

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  • Method for computing driving current of light source of screen
  • Method for computing driving current of light source of screen
  • Method for computing driving current of light source of screen

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Embodiment Construction

[0010] refer to figure 1 and Figure 2, figure 1 It is a schematic diagram of the display 10 of the present invention, and FIG. 2 is figure 1 A block diagram of the display 10. The display 10 includes a light source 12 , a screen 14 , a light sensor 16 , a computing device 18 and an alert interface 20 . The screen 14 has a light-emitting side 22, and the light emitted by the light source 12 needs to pass through other components (such as: backlight module, brightness enhancement film, polarizer, etc.) arranged inside the display 10 to perform brightness uniformity and brightness enhancement, so that the screen 14 The light output side 22 outputs display light. The light sensor 16 is disposed on the light emitting side 22 of the screen 14, and the light sensor 16 is used to detect the light signal of the display light emitted by the screen 14, and the light signal can be a square wave signal. The computing device 18 is electrically connected to the screen 14 and the light se...

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Abstract

The invention relates to a method for counting a drive current of a light source of a screen. The method includes the steps of detecting a light signal of a display light emitted by the screen and calculating the drive current of the light source according to the light signal detected.

Description

technical field [0001] The invention provides a method for calculating the driving current and related devices, and in particular relates to a method for calculating the driving current of a light source of a screen and related displays. Background technique [0002] In the current common display products, such as Liquid Crystal Display (LCD), it is often necessary to use a light sensor to measure the light generated by the internal light source. If the brightness value of the measured light has deviation or decline, Then the brightness of the light source can be adjusted by the microprocessor, so that the display can return to normal brightness display. [0003] As far as liquid crystal displays are concerned, the light required for displaying images is usually provided by cold cathode fluorescent lamps (Cold Cathode Fluorescent Lamp, CCFL) arranged under the display panel. Near the cold-cathode lamp, directly measure the brightness of the light emitted by the cold-cathode...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36G09G3/34
Inventor 徐启耀
Owner BENQ CORP