Color Filter Substrate Black Matrix Segmentation for Green Tint
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In liquid crystal displays (LCDs), the black matrix, acting as an incomplete insulator, induces voltage and charge, leading to increased voltage differences between electrodes, causing liquid crystal molecules to deflect and resulting in the 'green tint' issue during a dark state, especially when its edges are not flush with the color filter substrate.
Innovation Solution
A color filter substrate design where a portion of the black matrix is located in a non-display region and connected to apply a predetermined voltage, ensuring minimal voltage differences between the black matrix and electrodes, preventing liquid crystal molecule deflection and the 'green tint' phenomenon.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the black matrix edges are not flush with the color filter substrate edges, then the manufacturing process is easier, but light leaking occurs in the periphery of the liquid crystal panel during dark state
Solution Approach 1:
The black matrix is divided into two functional parts: a first black matrix portion extending to the color filter substrate edge for light blocking, and a second black matrix portion extending beyond the edge for voltage reference. This segmentation allows each part to fulfill its specific function without compromise.
Solution Approach 2:
The second black matrix portion acts as an intermediary element that provides a voltage reference for the liquid crystal molecules at the periphery, preventing unwanted deflection and light leaking while maintaining manufacturing ease.
2Ease of manufacture
If the black matrix is positioned away from the color filter substrate edges, then manufacturing is easier, but voltage difference increases causing liquid crystal deflection and green tint
Solution Approach 1:
The black matrix is segmented into two portions with distinct functions: the first portion for light blocking and the second portion for providing voltage reference. This allows the system to maintain voltage stability while ease of manufacture.
Solution Approach 2:
The second black matrix portion extends to the periphery to provide a voltage reference that maintains equipotential conditions at the edges, preventing voltage differences that would cause liquid crystal deflection and green tint.
3Adaptability or versatility
If the black matrix is an incomplete insulator, then it can induce necessary voltage and charge, but it causes increased voltage differences between electrodes leading to green tint
Solution Approach 1:
The black matrix is divided into two portions: the first portion induces voltage and charge for normal operation, while the second portion provides a stable voltage reference at the periphery. This segmentation allows the system to maintain both voltage induction capability and voltage difference control.
Solution Approach 2:
Different portions of the black matrix have different functional qualities: the first portion is optimized for voltage induction with its material properties, while the second portion is positioned to provide voltage reference stability at the periphery, creating local quality variations that solve the overall problem.
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 solution effectively prevents the 'green tint' issue in LCDs by maintaining stable voltage differences, thereby improving production yield and display quality.
Implementation Method 1
The black matrix can induce a certain amount of charge due to the capacitor effect, i.e., there is a certain induced voltage.
Data Source
AI summary
The present disclosure relates to the field of liquid crystal display technologies, and discloses a color filter substrate and a display component. For a display component which takes a transverse electric field as a driving electric field, when a part of a black matrix of a color filter substrate is located at a non-display region, the black matrix includes a portion to be connected, and a predetermined voltage is applied to the black matrix through the portion to be connected, so as to ensure that a voltage difference between the black matrix and a pixel electrode or between the black matrix and a common electrode is small enough to be unable to drive liquid crystal molecules to deflect, thereby avoiding undesirable phenomenon such as becoming green when displaying in dark state, and improving production yield and display quality.