Multimedia display capable of improving contrast and reducing backlight power consumption

Abstract

A multimedia display comprises a display panel and a direct-lit type backlight module (3). The direct-lit type backlight module comprises a plurality of light emitting modules respectively and independently controlled, and the light emitting modules are LED light bars (30). When the display panel displays a picture with a black edge, the multimedia display can control at least one of the LED light bars corresponding to the black edge in the direct-lit type backlight module, namely all the LED light bars corresponding to a non-display area (12b) of the picture not to give out light or to reduce light emitting brightness. All the light bars, corresponding to the non-display area (12b) of the picture, of the direct-lit type backlight module do not give out light, or part of the light bars do not give out light and the other light bars still normally give out light, or part of the light bars do not give out light, part of the light bars give out weak light, and the other light bars still normally give out light. All the LED light bars corresponding to a normal display area (12a) normally gives out light for sure. When the picture with the black edge is displayed, the picture contrast can be improved, and the power consumption of the direct-lit type backlight module can be reduced.

Description

technical field [0001] The present invention relates to a multimedia display, and in particular to a multimedia display using a direct-lit backlight module. Background technique [0002] See figure 1 , which is a schematic diagram of several screens with black borders. When the aspect ratio of the original image is different from that of the monitor screen, if the original image with the original aspect ratio is to be displayed on the screen, black borders will appear in the image displayed on the screen. Alternatively, when the aspect ratio of the original image is different from that of the converted target image, if the target image is intended to include the original image with the original aspect ratio, there will be black borders in the converted target image. [0003] In the first case, if figure 1 As shown in (a), for example, it occurs when the aspect ratio of the original image (such as 16:9 ≈ 1.78) is greater than the aspect ratio of the screen (such as 4:3 ≈ 1...

AI Technical Summary

Problems solved by technology

Or, when the aspect ratio of the original image and the converted target image are different, if you want to include the original image with the original aspect ratio in the target image, there will be black borders in the converted target image

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