Display Panel Aperture Ratio via Vertical Electrode Shielding
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Solution Overview
Problem
Current high-resolution display products face challenges in improving light transmittance due to reduced aperture ratios caused by stringent BM design rules and the need for high pixel density.
Innovation Solution
The display panel design reduces the width of the light shielding layer by optimizing the arrangement of gate lines, data lines, and common electrodes, along with the use of a negative liquid crystal layer, to increase the pixel aperture ratio and enhance light transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the pixel density is increased to meet high resolution requirements, then the image quality is improved, but the aperture ratio is reduced and light transmittance deteriorates
Solution Approach 1:
The common electrode is extended in the vertical direction to overlap with the gate line, creating a three-dimensional electric field shielding structure. This vertical dimension approach allows the light shielding layer width to be reduced while maintaining effective electric field shielding, thereby improving light transmittance without sacrificing pixel density
Solution Approach 2:
The function of light shielding is extracted from the traditional wide light shielding layer and concentrated into a narrower light shielding layer combined with the extended common electrode. This extraction allows the light shielding function to be achieved with minimal width, increasing the aperture ratio while maintaining high pixel density
2Illumination intensity
If the light shielding layer width is reduced to increase aperture ratio, then light transmittance is improved, but electric field shielding capability may deteriorate
Solution Approach 1:
The common electrode is extended vertically to overlap with the gate line, creating a three-dimensional electric field shielding structure. This vertical extension compensates for the reduced horizontal width of the light shielding layer, maintaining effective electric field shielding while allowing the light shielding layer to be narrower for improved light transmittance
Solution Approach 2:
The light shielding layer and common electrode are combined into a composite structure where the common electrode extends to overlap the gate line. This composite approach integrates both light shielding and electric field shielding functions into a unified narrow structure, achieving both improved light transmittance and maintained electric field shielding capability
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
This design effectively increases the pixel aperture ratio and improves light transmittance by reducing the width of the light shielding layer, addressing the urgent need for higher transmittance in high-resolution display products.
Implementation Method 1
the common electrode can play the role of shielding the electric field, to shield the electric field between the gate line and the pixel electrode
Implementation Method 2
the liquid crystal layer includes a negative liquid crystal. The oblique electric field between the data line and the pixel electrode does not interfere with the negative liquid crystal and does not cause light leakage
Data Source
AI summary
A display panel and a display device are provided. The display panel includes: an array substrate, a cell-assembling substrate, and a liquid crystal layer located therebetween. The array substrate includes a first base, and the first base comprises sub-pixel regions (A), a first trace region (B) located between two adjacent rows of sub-pixel regions (A), and a second trace region (C) located between two adjacent columns of sub-pixel regions (A). Gate lines (1) are located in the first trace region (B). Data lines (2) are located in the second trace region (C), each data line (2) has a support portion (21), and the support portion (21) is located in an intersection region of the first trace region (B) and the second trace region (C). Sub-pixel units are located in the sub-pixel region (A), and the sub-pixel units includes a common electrode (4).