Zig-Zag Scanning Wiring in Stacked LCD Panels
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Solution Overview
Problem
Liquid crystal display devices with stacked panels face issues of brightness decrease and color moire due to bending points of polygonal signal lines blocking light between specific color pixels, leading to decreased brightness and color inconsistencies.
Innovation Solution
A liquid crystal display device configuration with a first color panel and a second monochrome panel, where the second panel's scanning wiring has bending points arranged at a period corresponding to a non-natural multiple of sub-pixels, effectively averaging light blocking effects across the display region to suppress color moire.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the signal lines of the light control panel are configured as polygonal lines to improve moire, then the grid lines pattern mismatch improves general moire, but the bending points periodically block light entering specific color pixels causing color moire and brightness decrease
Solution Approach 1:
The display system is divided into two separate panels: a first liquid crystal display panel for color display and a second liquid crystal display panel for monochrome display. This segmentation allows each panel to have optimized signal line configurations independent of each other, preventing the color moire issue while maintaining the benefits of polygonal signal lines in the monochrome panel for suppressing general moire patterns.
Solution Approach 2:
The solution moves from a single-panel system to a stacked multi-panel system, adding the dimension of panel layering. The first panel handles color information while the second panel handles luminance information, separating the functions and allowing independent optimization of signal line patterns for each panel type.
2Illumination intensity
If the bending points of polygonal signal lines are positioned between pixels to block light, then the light blocking effect controls pixel brightness, but the periodic positioning between specific color pixels causes brightness decrease and color inconsistency
Solution Approach 1:
The display functionality is segmented into two independent panels: the first panel for color display where brightness control is achieved through liquid crystal modulation without physical light blocking, and the second monochrome panel where the bending signal lines provide light blocking for luminance control. This segmentation resolves the conflict between brightness control and color consistency.
Solution Approach 2:
The second monochrome panel acts as an intermediary layer that handles the light blocking function through its bending signal lines, while the first color panel handles the color display function without being affected by the light blocking patterns. This intermediary structure allows independent optimization of each function.
Data Source
AI summary
A liquid crystal display device includes a first liquid crystal display panel and a second liquid crystal display panel. The second liquid crystal display panel includes a scanning wiring extending in a zig-zag in the predetermined first direction. A period of bending points of the scanning wiring corresponds to a predetermined number of the sub pixels of the first liquid crystal display panel. The predetermined number is greater that a number of colors of the sub pixels arranged in the predetermined first direction in one of the first main pixel of the first liquid crystal display panel, and is not a natural number multiple of the number of colors of the sub pixels repeatedly arranged along the predetermined first direction of the first liquid crystal display panel.