Array Substrate With Stacked Pixel Electrodes
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Solution Overview
Problem
The transmittance of liquid crystal display (LCD) panels is limited due to the presence of a lower liquid crystal panel in dual cell display technology, which decreases image contrast and overall display performance.
Innovation Solution
An array substrate design where adjacent pixel electrodes are provided in different layers and insulated from each other, with overlapping areas covered by data and gate lines, eliminating the need for wider lines to block gaps and preventing light leakage, thereby increasing the aperture ratio and improving transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If adjacent pixel electrodes are placed in the same layer with gaps between them, then the structure is simple, but wider data and gate lines are needed to block the gaps, reducing transmittance
Solution Approach 1:
The patent transitions from a two-dimensional planar arrangement to a three-dimensional stacked arrangement by placing adjacent pixel electrodes in different layers (first and second pixel electrode layers). This vertical stacking eliminates the need for wide blocking lines, thereby improving transmittance while maintaining structural simplicity through the use of standard thin-film transistor fabrication processes.
Solution Approach 2:
The pixel electrode structure is segmented into multiple independent layers (first pixel electrode layer and second pixel electrode layer), with each layer containing alternating pixel electrodes. This segmentation allows adjacent pixel electrodes to be positioned in different layers rather than requiring wide spacing in the same layer, thus improving aperture ratio and transmittance.
2Reliability
If wider data and gate lines are used to block gaps between pixel electrodes, then light leakage is prevented, but the line width increases reducing the aperture ratio and transmittance
Solution Approach 1:
The patent resolves the contradiction by moving the light-blocking function from the planar dimension to the vertical dimension. Data and gate lines are positioned between the first and second pixel electrode layers, where they can effectively block light leakage between adjacent pixel electrodes without occupying excessive area in the aperture plane, thus maintaining high aperture ratio.
Solution Approach 2:
The patent introduces an intermediate positioning of data and gate lines between the two pixel electrode layers, acting as mediators that block light leakage between adjacent pixel electrodes. This intermediate positioning allows thin lines to effectively prevent light leakage while minimizing their impact on the aperture ratio.
3Reliability
If dual cell display technology is used to improve image quality, then contrast is enhanced, but transmittance decreases due to the additional lower liquid crystal panel
Solution Approach 1:
The liquid crystal display is segmented into two separate liquid crystal layers (first and second liquid crystal layers) with corresponding pixel electrode layers. This segmentation allows each layer to be optimized independently, maintaining the contrast enhancement benefits of dual cell technology while reducing the overall thickness and improving light transmittance compared to traditional stacked dual cell designs.
Solution Approach 2:
The patent reorganizes the dual cell structure by stacking pixel electrode layers and liquid crystal layers vertically, with adjacent pixel electrodes in different layers. This three-dimensional arrangement maintains the optical path separation needed for high contrast while minimizing the total light path length, thereby improving transmittance compared to conventional dual cell displays.
Data Source
AI summary
The present disclosure provides an array substrate, a liquid crystal light control structure and a liquid crystal display panel. The array substrate includes: a base substrate; a plurality of data lines arranged on the base substrate along a first direction; and a plurality of pixel electrodes arranged in an array. Two of the plurality of pixel electrodes, which are adjacent in the first direction, are provided in different layers and insulated from each other. Orthographic projections of the two of the plurality of pixel electrodes, which are adjacent in the first direction, to the base substrate, adjoin each other with an adjoiner therebetween being covered by an orthographic projection of one of the plurality of data lines to the base substrate.