Display Panel Pixel Electrode Overlap for High PPI
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Solution Overview
Problem
High-resolution liquid crystal displays face challenges in maintaining display quality due to reduced pixel electrode distances and overlapping areas, leading to decreased storage capacitance and increased manufacturing errors.
Innovation Solution
The design of a display panel where the second pixel electrode is adjacent to and overlaps a portion of the first pixel electrode's through hole in the common electrode, allowing for reduced distance between pixel electrodes, increased pixel density, and enhanced storage capacitance by maximizing overlapping areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the distance between pixel electrodes is reduced to increase pixel density, then pixel per inch (ppi) is improved, but manufacturing precision deteriorates due to increased sensitivity to positional shifts
Solution Approach 1:
The patent applies beforehand cushioning by designing the pixel electrode to extend beyond the common electrode's through hole, creating an overlapping region. This overlapping structure serves as a buffer zone that compensates for positional shifts during manufacturing, allowing the pixel electrode to maintain proper alignment even when slight deviations occur, thus cushioning against manufacturing precision issues while enabling higher pixel density
2Device complexity
If the overlapping area between pixel electrode and common electrode is reduced, then device complexity is simplified, but storage capacitance deteriorates
Solution Approach 1:
The patent applies another dimension by utilizing the vertical overlap between the pixel electrode and common electrode in the cross-sectional dimension. Instead of increasing horizontal area, the design extends the pixel electrode vertically beyond the through hole, creating an overlapping region that enhances storage capacitance through increased effective area in the vertical dimension while maintaining simple planar structure
Data Source
AI summary
A display panel is provided. The display panel includes a first substrate, a first insulating layer, a common electrode, a second insulating layer, a first pixel electrode, and a second pixel electrode. The first insulating layer is located on the first substrate. The common electrode having a first through hole is located on the first insulating layer. The second insulating layer covers the common electrode and partially covers the first through hole. The first pixel electrode is located on the second insulating layer and penetrates through the first through hole. The second pixel electrode is located on the second insulating layer. The second pixel electrode is adjacent to the first pixel electrode and overlaps a portion of the first through hole.