Liquid Crystal Display Common Electrode Transmittance Design
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Solution Overview
Problem
Existing liquid crystal display panels face challenges in improving transmittance due to the design of common electrodes, which often results in reduced display quality and increased breakage risk, leading to low transmittance and dark field issues.
Innovation Solution
A display substrate design featuring a common electrode with a strip-shaped main electrode and symmetrically distributed branch electrodes in a minimum area, optimized to reduce the width of the main electrode and enhance the distribution of branch electrodes, thereby improving transmittance and display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the common electrode is designed with a conventional structure, then the manufacturing process is simple, but the transmittance is reduced and display quality is influenced
Solution Approach 1:
The common electrode is segmented into a main electrode and multiple branch electrodes. The main electrode extends in the first direction and the branch electrodes extend in the second direction, creating a grid-like structure that reduces the overall width of the common electrode in the critical dimension, thereby improving transmittance while maintaining manufacturing simplicity
Solution Approach 2:
The common electrode structure transitions from a single-dimensional strip to a two-dimensional grid pattern with main electrodes in the first direction and branch electrodes in the second direction. This dimensional change allows the electrode to maintain electrical functionality while reducing its width in the first direction, thus improving light transmittance
2Reliability
If the common electrode width is increased, then the electrode is less prone to breakage, but the transmittance is reduced
Solution Approach 1:
The common electrode is divided into multiple segments (main electrode and branch electrodes) connected at junctions. This segmentation allows each segment to be narrower and less prone to breakage, while the overall electrode structure maintains reliability through the distributed network of conductive paths
Solution Approach 2:
The main electrode and branch electrodes are merged at junction points to form a continuous conductive network. This merging ensures electrical connectivity is maintained across the segmented structure, providing reliability equivalent to or greater than a solid electrode while allowing reduced width for improved transmittance
3Measurement precision
If more black matrixes are added to increase resolution, then the resolution is improved, but the transmittance is reduced and display quality is influenced
Solution Approach 1:
The common electrode structure serves multiple functions: it provides electrical connectivity, defines pixel boundaries, and acts as a transparent conductive layer that does not obstruct light. This multi-functionality allows the electrode design to support high-resolution displays with more black matrices while maintaining high transmittance through its optimized grid pattern
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
The design effectively enhances transmittance and reduces breakage risk, ensuring improved display quality and stability by sharing the main electrode between sub-pixels and using symmetrically distributed branch electrodes to maintain uniform electric fields.
Implementation Method 1
a common electrode located in a minimum area enclosed by the plurality of data lines and the plurality of gate lines
Data Source
AI summary
Disclosed are a display substrate, a liquid crystal display panel (100) and a display device. The display substrate (9) includes: a base substrate (1), a plurality of sub-pixels arranged in an array on the base substrate, a plurality of data lines (D) extending in a first direction (X), a plurality of gate lines (G) extending in a second direction (Y), and a common electrode (2) arranged in a minimum area enclosed by the data lines and the gate lines; wherein the minimum area includes two sub-pixels, the common electrode includes a main electrode (21) with strip-shaped which is arranged at the junction of the two sub-pixels and a plurality of branch electrodes (22) with strip-shaped which are symmetrically distributed on two sides of the main electrode, and the extending directions of a part of the plurality of branch electrodes arranged on a same side of the main electrode are identical.