Display Substrate Organic Insulating Pattern Removal for Motion Blur
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Solution Overview
Problem
In liquid crystal display devices, the formation of a color filter or black matrix on the array substrate leads to motion blur and display quality deterioration due to stepped portions and impurities from organic insulating layers exposed to UV radiation.
Innovation Solution
A display substrate with a color filter layer on the pixel area, a first organic insulating pattern on the boundary area, and a blocking pattern is used, along with a method involving the removal of the organic insulating layer from the pixel area and partial reduction of its thickness at boundaries to minimize impurity effects and prevent motion blurring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If a color filter or black matrix is formed on the array substrate, then the aperture ratio of the pixel is increased and manufacturing cost is reduced, but stepped portions are created that cause motion blur malfunction
Solution Approach 1:
The array substrate is divided into a pixel area and a boundary area. The color filter is formed only in the pixel area, while the boundary area has a different structure to eliminate stepped portions. This segmentation allows the aperture ratio to be maximized in the pixel area while preventing motion blur at the boundaries.
Solution Approach 2:
Different structural qualities are applied to different regions: the pixel area has a standard color filter structure for high aperture ratio, while the boundary area has a modified structure without stepped portions to prevent motion blur. This local differentiation resolves the contradiction between aperture ratio and motion blur prevention.
2Reliability
If an organic insulating layer is exposed to ultraviolet radiation, then the insulating properties are maintained, but impurities are generated that cause display quality deterioration
Solution Approach 1:
The organic insulating layer is selectively removed from the pixel area where it would generate harmful impurities under UV radiation. The layer is retained only in the boundary area where it serves its insulating function without causing display quality deterioration, thus extracting the harmful element while preserving the useful function.
Solution Approach 2:
The organic insulating layer is strategically positioned in the boundary area where its presence provides electrical insulation without causing motion blur or generating harmful impurities in the display region. This converts a potentially harmful material into a beneficial component by changing its location and function.
3Object-generated harmful factors
If the organic insulating layer is completely removed from the boundary area, then impurity generation is prevented, but the insulating function at boundaries is compromised
Solution Approach 1:
The organic insulating layer is selectively retained in the boundary area while removed from the pixel area. This local differentiation maintains the insulating function where needed (at boundaries) while preventing impurity generation in the display region, resolving the contradiction between these two requirements.
Data Source
AI summary
In a method of manufacturing a display substrate and a method of manufacturing a display panel, the display substrate includes a color filter layer disposed on a base substrate within a pixel area, a first organic insulating pattern disposed on a first boundary area between adjacent pixel areas, a pixel electrode disposed on the color filter layer, and a first blocking pattern disposed on the first organic insulating pattern. Accordingly, an organic insulating layer corresponding to the pixel area is removed so that deterioration of the display quality by impurities generated from the organic insulating layer may be minimized. In addition, a stepped portion of a blocking pattern disposed between a pixel area and a boundary area of a plurality of the pixel areas is reduced so that motion blurring of a liquid crystal may be prevented.