Staggered Light Shields in Liquid Crystal Display Suppress Color Moire
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Solution Overview
Problem
Existing liquid crystal display devices suffer from color moire due to periodic blocking of light by signal lines in the optical control panel, leading to uneven brightness and color distortion.
Innovation Solution
A liquid crystal display device comprising a first liquid crystal display panel for color images and a second liquid crystal display panel positioned on the observer side, with the second panel divided into regions having pixel electrodes and light shields formed from switching elements, arranged in a staggered manner to equally block light for each color.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If signal lines of the optical control panel are folded at a predetermined period to improve moire, then spatial frequency interference is reduced, but the thin film transistors periodically block light incident on subpixel units of a specific color, causing brightness to periodically decline and color moire to occur
Solution Approach 1:
The invention divides the second liquid crystal display panel into multiple regions with pixel electrodes and light shields arranged in a segmented, staggered pattern. This segmentation ensures that light blocking is distributed evenly across different color subpixels rather than periodically affecting specific colors, thereby resolving the color moire issue while maintaining moire suppression
Solution Approach 2:
The light shields are configured with different local properties in different regions of the panel. By arranging light shields in a staggered manner across multiple regions and making them connect to pixel electrodes through switching elements, the invention creates local variations in light blocking patterns that prevent periodic brightness decline of specific color subpixels
2Illumination intensity
If a second liquid crystal display panel is stacked on the first panel to enhance contrast, then display contrast is improved, but signal lines and pixel structures cause periodic light blocking and color moire
Solution Approach 1:
The invention employs a nested structure where the second liquid crystal display panel is positioned on the observer side of the first panel, with light shields and pixel electrodes nested within the pixel structure. This nested arrangement allows the second panel to enhance contrast while the staggered light shield configuration prevents color moire by ensuring equal light blocking for each color
Solution Approach 2:
The light shields are arranged in an asymmetric, staggered pattern across different regions of the second panel rather than a symmetric periodic pattern. This asymmetric arrangement disrupts the periodicity that causes color moire while maintaining the contrast enhancement function of the stacked panel structure
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 suppresses color moire by ensuring equal light blocking for each color, maintaining uniform brightness and color accuracy across the display, even when viewed from different angles.
Implementation Method 1
the plurality of light shields equally blocks, for each color, light incident on the subpixels
Data Source
AI summary
A liquid crystal display device includes a first liquid crystal display panel in which a first main pixel including subpixels is arranged in a matrix, and that displays a color image, and a second liquid crystal display panel that includes a second main pixel corresponding to a plurality of the first main pixel, and that displays a monochrome image. The second main pixel is divided into a plurality of regions, and has pixel electrodes disposed in the plurality of regions and a plurality of light shields. At least a portion of the plurality of light shields is formed from a switching element that connects to each of the pixel electrodes, and the plurality of light shields is arranged in a staggered manner. The light shields positioned within one set of the regions formed from adjacent regions forms one set of the light shields.