Display Panel Dummy Region Film Thickness Balancing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Liquid crystal display panels experience poor display on the periphery due to excessive film thickness step differences between the display region and the dummy region, leading to uneven chroma and brightness, primarily caused by the absence of color resists in the dummy region.
Innovation Solution
The display panel design includes a first substrate with a thicker second black matrix in the dummy region and a second substrate with a color resist layer, along with post spacers, to create balanced film thicknesses between the display and dummy regions, reducing the seesaw effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If color resists are applied only in the display region, then the manufacturing process is simplified, but the film thickness step difference between display region and dummy region increases
Solution Approach 1:
The patent applies different thicknesses of black matrix material to different regions: the display region has a first thickness while the dummy region has a greater second thickness. This local differentiation compensates for the absence of color resists in the dummy region, balancing the overall film thickness between regions and eliminating the seesaw effect.
2Manufacturing precision
If the black matrix thickness is increased in the dummy region, then the film thickness step difference is reduced, but the device complexity increases
Solution Approach 1:
The patent combines the black matrix layer with the color resist layer into a single integrated structure. The black matrix is formed with varying thickness directly during the color resist formation process, eliminating the need for separate compensation structures and reducing overall device complexity while maintaining film thickness uniformity.
Data Source
AI summary
The present application discloses a display panel. The display panel is defined with a display region and a dummy region and include a first substrate and a second substrate. The first substrate comprises a first black matrix disposed in the display region and a second black matrix disposed in the dummy region. A thickness of the second black matrix is greater than a thickness of the first black matrix such that the dummy region of the first substrate forms a first thickened layer relative to the display region. The second substrate is disposed opposite to the first substrate. The present application can reduce a film thickness difference between the display region and the dummy region, weaken a seesaw effect, and improve poor display on a periphery of the display panel.