DBS Electrode Slit Design for Liquid Crystal Display Panels
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Solution Overview
Problem
The conventional liquid crystal display panel's DBS electrode always overlapping with data lines results in high parasitic capacitance, limiting its application in high-frequency and large-sized display panels.
Innovation Solution
The DBS electrode is designed with slit-shaped openings above the data lines, and a black matrix is positioned to cover these openings, reducing the overlapping area and parasitic capacitance while maintaining light shielding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the DBS electrode always overlaps with the data line to shield light, then light shielding performance is improved, but parasitic capacitance of the data line increases
Solution Approach 1:
The DBS electrode is segmented by introducing slit-shaped openings that divide it into multiple isolated regions. This segmentation reduces the overlapping area between the DBS electrode and the data line, thereby reducing parasitic capacitance while maintaining light shielding performance through the black matrix coverage.
Solution Approach 2:
The black matrix is positioned to specifically cover the slit-shaped openings of the DBS electrode, creating a localized light shielding structure. This allows the DBS electrode to have reduced overlapping area (lower parasitic capacitance) while the black matrix provides the necessary light shielding at critical locations.
2Illumination intensity
If the DBS electrode completely covers the data line for optimal light shielding, then contrast ratio is improved, but parasitic capacitance increases limiting high-frequency application
Solution Approach 1:
The DBS electrode is divided into isolated regions by slit-shaped openings, reducing the total overlapping area with the data line. This reduces parasitic capacitance to enable high-frequency performance while the black matrix coverage maintains the contrast ratio.
Solution Approach 2:
The black matrix acts as an intermediary element that provides light shielding functionality. By positioning the black matrix to cover the slit-shaped openings, the system achieves optimal contrast ratio without requiring the DBS electrode to completely overlap the data line, thus enabling high-frequency operation.
3Illumination intensity
If the DBS electrode is designed with larger overlapping area for better light shielding, then display quality is improved, but parasitic capacitance increases affecting large-sized panel application
Solution Approach 1:
The DBS electrode is segmented into isolated regions by slit-shaped openings, which reduces the overlapping area and parasitic capacitance. This enables the structure to be applied to large-sized panels where low parasitic capacitance is critical, while display quality is maintained through black matrix coverage.
Solution Approach 2:
The black matrix is strategically positioned to cover the slit-shaped openings, providing localized light shielding that maintains display quality. This allows the DBS electrode to have reduced overlapping area suitable for large-sized panels with lower parasitic capacitance requirements.
Data Source
AI summary
A liquid crystal display panel includes a color filter substrate, an array substrate, and a liquid crystal layer. The array substrate includes a plurality of data lines and a plurality of data line black matrix less (DBS) electrodes disposed above the data lines. The DBS electrodes include at least one slit-shaped opening disposed at intervals. It may solve the problem that the data line and the DBS electrode always keep overlapping in the pixel structure of the prior art, resulting in a high parasitic capacitance of the data line, which is beneficial to the application of the DBS electrode in high-frequency and large-sized display panels.