Transflective Array Substrate Layout for Higher Pixel Aperture
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Solution Overview
Problem
In transreflective type liquid crystal display devices, the spacing between adjacent pixel regions is limited by the need to prevent adjacent reflective electrodes from short-circuiting, resulting in a small pixel aperture ratio.
Innovation Solution
The array substrate design includes a transmissive region with connected first and second regions between adjacent reflective regions in both directions, allowing the transmissive electrode to partially cover the reflective regions and fill the gaps, thereby increasing the pixel aperture ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the spacing between adjacent pixel regions is reduced, then the pixel aperture ratio is improved, but the risk of short-circuit between adjacent reflective electrodes increases
Solution Approach 1:
The transmissive electrode extends in the vertical direction (thickness dimension) to bridge the gap between adjacent pixel regions. By utilizing the thickness dimension rather than only the planar dimensions, the electrode can reach across the spacing gap without requiring larger horizontal spacing, thus maintaining small pixel aperture while preventing short-circuits through adequate vertical insulation distance
Solution Approach 2:
The transmissive electrode acts as an intermediary structure that spans across the spacing between adjacent reflective electrodes. It provides both electrical connection functionality and physical separation, allowing adjacent pixel regions to be closely spaced while maintaining electrical isolation through its extended structure and insulation layers
Data Source
AI summary
Provided is an array substrate, including a first base substrate, and a drive circuit layer, a transmissive electrode layer and a reflective electrode layer which are sequentially laminated. A plurality of gate lines and a plurality of data lines in the drive circuit layer extend in a first direction and a second direction, respectively, and intersect to define a plurality of pixel regions. Each pixel region includes a transmissive region and a reflective region. The transmissive region includes at least one first region and at least one second region connected to each other. The first region and the second region are between adjacent two reflective regions. The reflective electrode layer includes reflective electrodes in one-to-one correspondence with reflective regions and cover the corresponding reflective regions. The transmissive electrode layer includes transmissive electrodes in one-to-one correspondence with transmissive regions and at least cover the corresponding transmissive regions.