Display Panel Light-Shielding Structure for LCD Leakage
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Solution Overview
Problem
Existing liquid crystal display (LCD) panels face issues with light leakage due to the accumulation of induced charges on the black matrix pattern, leading to abnormal display and screen flicker.
Innovation Solution
A display panel design featuring a light-shielding pattern layer and a light-shielding structure layer, where the light-shielding pattern layer is located on one substrate and the light-shielding structure layer on the opposing substrate, with strategically placed gaps and light-shielding structures to reduce charge accumulation and electric fields.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a black matrix pattern is used to separate sub-pixel regions, then light leakage between sub-pixels is reduced, but induced charges accumulate on the black matrix pattern causing screen flicker and abnormal display
Solution Approach 1:
The light-shielding pattern layer is divided into multiple independent light-shielding portions corresponding to different sub-pixel regions. Each light-shielding portion is separately formed and can be independently controlled, allowing the light shielding function to be maintained while reducing charge accumulation through segmented structure design.
Solution Approach 2:
The light-shielding pattern layer uses different materials or structures in different regions. Specifically, the light-shielding portions have different properties from the surrounding areas, with optimized material composition and thickness to achieve effective light shielding while minimizing induced charge accumulation in critical regions.
2Object-affected harmful factors
If the light-shielding pattern layer is made thicker to improve light shielding effect, then light leakage is reduced, but manufacturing complexity and difficulty increase
Solution Approach 1:
Instead of increasing thickness in one dimension, the solution transitions to a multi-layer approach with the light-shielding pattern layer formed on the first substrate and the light-shielding structure layer formed on the second substrate. This distributes the light shielding function across different spatial dimensions and layers, achieving effective light shielding while maintaining manufacturability.
Solution Approach 2:
The light-shielding structure layer is nested within the overall display panel structure, positioned between the second substrate and the liquid crystal layer. This nested arrangement integrates the light shielding function into the existing multi-layer display structure without adding external complexity.
3Object-affected harmful factors
If the light-shielding structure layer is formed close to the display region to maximize light shielding, then light leakage is reduced, but electric fields strengthen causing abnormal display
Solution Approach 1:
The light-shielding structure layer acts as an intermediary element positioned between the second substrate and the liquid crystal layer. It provides light shielding while its specific positioning and structure design modulates the electric field distribution, preventing excessive electric field strength that would cause display abnormalities.
Solution Approach 2:
The position, thickness, and material properties of the light-shielding structure layer are optimized to change the electric field distribution parameters. By adjusting these parameters, the structure achieves effective light shielding while maintaining electric field strength within acceptable ranges for normal display operation.
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 solution effectively reduces light leakage and screen flicker by minimizing the accumulation of induced charges and electric fields, thereby improving the display quality and reliability of the LCD panel.
Implementation Method 1
a light-shielding pattern layer, a second substrate, and a light-shielding structure layer. The light-shielding pattern layer is located on the first substrate, and the light-shielding pattern layer is located in the light-shielding region and covering part of the light-shielding region
Data Source
AI summary
A display panel has a plurality of sub-pixel regions arranged in an array of a plurality of rows and a plurality of columns, and a light-shielding region that separates the sub-pixel regions and surrounds all the sub-pixel regions as a whole. The display panel includes: a first substrate; a light-shielding pattern layer located on the first substrate, the light-shielding pattern layer being located in the light-shielding region and covering part of the light-shielding region; a second substrate disposed opposite to the first substrate; and a light-shielding structure layer located on the second substrate, the light-shielding structure layer covering at least a region of the light-shielding region that is not covered by the light-shielding pattern layer.