Liquid Crystal Display Sub-Pixel Luminance Arrangement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Liquid crystal display devices with color pixels arrayed in a matrix suffer from reduced display quality due to border areas between different gray scale levels appearing colored, especially when viewed from oblique angles.
Innovation Solution
A liquid crystal display device with a color display pixel configuration that includes multiple sub-pixels, where at least one sub-pixel exhibits higher luminance than others at intermediate gray scale levels, and are arranged in a specific matrix pattern to improve viewing angle characteristics and suppress color blurring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a color display pixel with multiple pixels arrayed in a matrix is used, then display quality is improved, but border areas between different gray scale levels appear colored when viewed from oblique angles
Solution Approach 1:
The patent applies local quality by making the second sub-pixel exhibit higher luminance than the first sub-pixel at intermediate gray scale levels. This creates a local luminance difference that compensates for the viewing angle dependence of the gamma characteristic, thereby suppressing color blurring in border areas when viewed from oblique directions while maintaining overall display quality.
2Object-affected harmful factors
If the second sub-pixel is positioned at the center of the color display pixel, then color blurring is suppressed, but the aperture ratio may be reduced
Solution Approach 1:
The patent applies partial action by having only the second sub-pixel exhibit higher luminance at intermediate gray scale levels, while the first sub-pixel maintains normal luminance characteristics. This selective luminance enhancement achieves the necessary compensation for viewing angle dependence without requiring all sub-pixels to be modified, thereby minimizing the impact on aperture ratio.
3Manufacturing precision
If the gamma characteristic is made consistent across different viewing angles, then color accuracy is improved, but the device complexity increases due to additional sub-pixels and control mechanisms
Solution Approach 1:
The patent applies parameter changes by modifying the luminance parameter of the second sub-pixel to be higher than that of the first sub-pixel at intermediate gray scale levels. This parameter adjustment compensates for the viewing angle dependence of the gamma characteristic, achieving consistent color accuracy across different viewing angles through a relatively simple mechanism.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively alleviates the reduction in display quality by ensuring consistent color representation across different viewing angles, preventing color blurring and maintaining high display quality.
Implementation Method 1
a change of optical rotatory power which is caused by a change of alignment of the liquid crystal molecules by voltage application is utilized to control the amount of light to be transmitted
Data Source
AI summary
A liquid crystal display device (100) according to the present invention includes a color display pixel D including pixels PA through PD arrayed in a matrix. The pixels PA through PD respectively include sub pixels SA1 through SD1and sub pixels SA2 through SD2. At least at an intermediate gray scale level, the luminance of the sub pixels SA2 through SD2 is higher than the luminance of the sub pixels SA1through SD1. The plurality of sub pixels S included in the pixels PA through PD are arrayed in a matrix. The sub pixel SA2 is adjacent to the sub pixel SB2 in the row direction, is adjacent to the sub pixel SC2 in the column direction, and is adjacent to the sub pixel SD2 in an oblique direction.