System and method for improving color and brightness uniformity of backlit LCD displays

A brightness uniformity, display technology, applied in static indicators, instruments, etc., can solve the problem of not providing adjustment signals, etc.

Active Publication Date: 2012-01-25
GEO SEMICONDUCTOR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These prior art techniques do not address the non-uniformity that the observer would observe
Furthermore, no solution is provided to adjust the chromaticity of the signal

Method used

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  • System and method for improving color and brightness uniformity of backlit LCD displays
  • System and method for improving color and brightness uniformity of backlit LCD displays
  • System and method for improving color and brightness uniformity of backlit LCD displays

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Embodiment Construction

[0043] It should be appreciated that numerous specific details were described in order to provide a thorough understanding of the typical embodiments described herein.

[0044] However, it will be understood by those skilled in the art that the embodiments and / or implementations described herein may be practiced without these specific details. In other instances, well-known methods, procedures, and components have not been described in detail so as not to obscure the embodiments and / or implementations described herein. Furthermore, the description is not to be viewed as limiting the scope of the embodiments described herein, but rather as describing the structure and operation of various embodiments and / or implementations described herein.

[0045] Figure 1 shows a typical LCD system, which is at a high level in terms of color and brightness, and can be seen as a light source (also called a backlight panel) 10 or 11, and a light modulator 16 display. The backlight panel, such...

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Abstract

Systems and methods for improving color and brightness uniformity of an image displayed on a backlit LCD are disclosed. In one example, a correction map is computed and applied to the LCD pixel values. In another example, the voltage settings of the backlight source components are also corrected in addition to the LCD pixel values. For efficient hardware implementation, corrections are applied using function representation of a grid data transformation relating measured values to corrected values. In one particular exemplary embodiment, the backlight source is provided by a plurality of LEDs. In another exemplary embodiment, the display consists of a plurality of OLEDs wherein the light source and the display panels coincide.

Description

technical field [0001] Embodiments described herein relate generally to electronic image and video processing, and more specifically to correction of color and brightness non-uniformities of backlit LCD panels. Background technique [0002] Light-emitting diodes (LEDs) are made of special materials that radiate visible and invisible light (covering the infrared to ultraviolet range of the electromagnetic spectrum) based on the spontaneous recombination of electrons and holes in a p-n junction. A forward bias voltage is usually applied to the p-n junction to accelerate electron-hole recombination and generate sufficient brightness. The wavelength (and thus color) of the emitted light depends on the energy of the semiconductor's bandgap. Early LEDs emitted low-intensity red light. Only recently have new semiconductor materials with large energy band gaps to allow LEDs to emit green light, followed by new semiconductor materials with large energy band gaps to allow LEDs to em...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/34G09G3/36
Inventor 罗纳瓦·S.·巴希阿什坎·阿拉维·哈拉特
Owner GEO SEMICONDUCTOR INC
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