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Scheme for adjusting image data of LCD (liquid crystal display) by aid of local darkened backlight

A technology of image data and backlight, applied to instruments, static indicators, etc., can solve problems such as unreasonable, high power consumption, and reduced processing speed

Active Publication Date: 2015-05-20
徐赤豪
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This results in a high cost of computational logic and memory
At the same time processing speed may decrease
The power consumption of such calculations can be high, and is especially unreasonable for mobile appliances such as smartphones or tablet PCs

Method used

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  • Scheme for adjusting image data of LCD (liquid crystal display) by aid of local darkened backlight
  • Scheme for adjusting image data of LCD (liquid crystal display) by aid of local darkened backlight
  • Scheme for adjusting image data of LCD (liquid crystal display) by aid of local darkened backlight

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Embodiment Construction

[0032] In order to solve the problems in the prior art, in the present invention, a concept of local dimming is proposed. The idea of ​​local dimming is based on the fact that i) one image may contain a large number of dark parts; ii) the LED devices of the backlight unit can be individually controlled. If the LEDs are controlled in such a way that, for example, the backlight is dark after dark parts of the image and bright after bright parts of the image, this means that the brightness of each LED can be different, and can depend on the content of the image. The desired brightness of a pixel (which is given by the image data) is achieved by the backlight brightness generated by the LEDs and the transmittance value of the LCD pixel. The advantage of local dimming is that it reduces power consumption.

[0033]In order to keep the brightness of the displayed image as desired, the transmission value of each LCD pixel must be adapted to the backlight, which may no longer be unif...

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PUM

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Abstract

The invention relates to a scheme for adjusting image data of an LCD (liquid crystal display) by the aid of local darkened backlight, and particularly discloses a method for accurately and effectively compensating pixels in local darkening procedures. The scheme has the advantages that a method for inhibiting visible tailored artifacts by means of applying local tailoring inhibiting factors to reduced images is introduced for conserving a large quantity of energy, high-quality images with image details and image brightness are ultimately fundamentally kept, and accordingly energy conservation and the image details can be compromised with one another at a low processing cost.

Description

technical field [0001] The present application relates to energy-efficient LCDs, in particular to achieve original brightness of images at relatively low cost by utilizing local dimming of the backlight to adjust the image data of the LCD. And by applying local clipping suppression to preserve image details, LCD achieves a trade-off between energy saving and image details. Background technique [0002] Displays are a core technology of modern HMIs and are used for many purposes. Examples of widely used devices that include a display are computers, mobile phones, and conventional televisions. A common type of display technology is an LCD display (LCD). LCD power consumption, however, is a growing concern with both the increasing use of LCDs in mobile, battery-operated devices and the emergence of larger displays. The backlight for an LCD is often the component of the LCD with the highest power consumption. Light Emitting Diode (LED) backlighting is a type of backlighting ...

Claims

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Application Information

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IPC IPC(8): G09G3/36G09G3/34
Inventor T·郑D·谢弗M·阿尔伯切特徐赤豪
Owner 徐赤豪