Display Panel Second Black Matrix Light Leakage
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Solution Overview
Problem
Current embedded capacitance touch screens employing the self-capacitance principle face issues with light leakage and incomplete coverage of component structures, which affect the display performance of liquid crystal panels.
Innovation Solution
The introduction of a second black matrix on the first substrate to cover structures on the second substrate, preventing exposure and light leakage, and expanding the interval region between common electrodes to prevent short circuits and improve display performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If self-capacitance touch-control electrodes are used to improve touch detection capability, then touch control functionality is enhanced, but light leakage and incomplete coverage of component structures occur
Solution Approach 1:
A second black matrix is introduced as an intermediary element between the first substrate (containing pixel regions) and the second substrate (containing touch control electrodes). This second black matrix specifically covers the touch control electrodes and signal wires on the second substrate, preventing light from reaching these components and causing leakage, while not interfering with the touch detection functionality.
Solution Approach 2:
The black matrix structure is segmented into two distinct parts: a first black matrix located between pixel regions on the first substrate, and a second black matrix located on the first substrate that specifically covers structures on the second substrate. This segmentation allows each black matrix to perform its specific function independently - the first for pixel isolation and the second for electrode coverage and light leakage prevention.
2Reliability
If interval region between common electrodes is expanded to prevent short circuits, then electrode reliability is improved, but manufacturing precision requirements increase
Solution Approach 1:
The second black matrix is formed in advance during the manufacturing process to pre-establish the coverage over touch control electrodes and signal wires. This preliminary action creates a physical barrier that ensures adequate spacing and prevents short circuits between electrodes before final assembly, reducing the precision requirements for subsequent manufacturing steps.
Data Source
AI summary
A display panel and a method for forming the same are provided. A display panel includes: a first substrate and a second substrate, which are set corresponding to each other; the first substrate includes multiple pixel regions arranged in a matrix form, and a first black matrix is disposed in intervals between the pixel regions; each of the pixel regions includes a first sub pixel region, a second sub pixel region, a third sub pixel region and a fourth sub pixel region; the first sub pixel region includes a first sub pixel unit, the second sub pixel region includes a second sub pixel unit, the third sub pixel region includes a third sub pixel unit; the fourth sub pixel region includes a fourth sub pixel unit and a second black matrix. Accordingly, the display panel may improve display performance.