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Defective pixel identification and mitigation in multi-layer liquid crystal displays

A pixel and defect technology, applied in the direction of static indicators, instruments, etc., can solve problems such as return, and achieve the effect of increasing the brightness value

Pending Publication Date: 2021-10-19
NVIDIA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, as many as twice as many units may suffer from latent defects that, if any, could cause the end user to return the product for a refund or exchange

Method used

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  • Defective pixel identification and mitigation in multi-layer liquid crystal displays
  • Defective pixel identification and mitigation in multi-layer liquid crystal displays
  • Defective pixel identification and mitigation in multi-layer liquid crystal displays

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Embodiment Construction

[0012] Systems and methods related to defective pixel identification and mitigation in multilayer liquid crystal displays (LCDs) are disclosed. Although the description herein is primarily directed to dual layer LCDs, this is not intended to be limiting and any number of liquid crystal (LC) layers may be implemented without departing from the scope of the present disclosure. Furthermore, although the LC layers primarily described herein are red, green, and blue (RGB) layers and monochrome (Y) layers, this is not intended to be limiting and includes, but is not limited to, layers of those described herein. Any combination can be achieved without departing from the scope of the present disclosure. Additionally, although cells may generally be referred to as defective cells, defective cells may include damaged, dead, normally open, normally closed, and / or other types of defective cells. Although the present disclosure primarily relates to LCD technology, particularly multi-layer...

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Abstract

The invention discloses defective pixel identification and mitigation in multi-layer liquid crystal displays. In various examples, defective cells from a first layer of a multi-layer liquid crystal display (LCD) may be compensated for by using one or more cells from a second layer of the multi-layer LCD. Color values corresponding to additional cells of the first layer that may be affected by the compensation of the second layer may also be adjusted to counter the compensation in order to generate a final pixel or sub-pixel value that closely mirrors the desired value from the image data. In addition, backlighting of the LCD may be adjusted such that one or more cells of the backlights, e.g., individual light-emitting diodes (LEDs) may be adjusted to further aid in compensating for or mitigating the appearance of the defective cell.

Description

Background technique [0001] Computer monitors, televisions, laptops, handheld devices, and other device types often implement liquid crystal displays (LCDs) as display panels. LCDs may include a single layer (eg, red, green, and blue (RGB) layers), or may include two or more layers (eg, an RGB layer and another layer, such as a monochrome layer). In the LCD manufacturing process, it is important that each cell in each layer of the LCD is functioning properly - for example, no defects, no dead pixels (dead), normally on (so bright or white), normally off (so black or nearly black), etc. For example, a single dead, broken or otherwise defective unit corresponding to a pixel or sub-pixel may result in an incorrect final display perceptible to the end user. These end users are often highly sensitive to defective or damaged pixels or sub-pixels and may return purchased devices containing one or more identifiably defective pixels or sub-pixels. [0002] With the introduction of d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/00
CPCG09G3/006G09G2330/08G09G2300/023G09G2330/10G09G3/3648G09G2320/0242G09G2330/12G09G2320/0285G09G3/3696G09G3/3607G09G2354/00
Inventor 汤姆·J·韦伯
Owner NVIDIA CORP