Display Panel Light Control Partitions Narrow Viewing Angle
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Solution Overview
Problem
Conventional liquid crystal display panels require a light control film to achieve a narrow viewing angle, which increases the thickness and cost of the display, and can lead to issues like screen reflection on vehicle windshields, compromising driver visibility.
Innovation Solution
Integrating light control partitions within the pixel area of the display panel, formed simultaneously with the black matrix, to eliminate the need for an external light control film, thereby controlling the viewing angle without increasing thickness or manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a light control film is added to achieve narrow viewing angle, then the viewing angle control is improved, but the thickness and cost of the display panel increase
Solution Approach 1:
The patent merges the light control partition function with the black matrix structure by forming both simultaneously from the same opaque material layer. This integration eliminates the need for a separate light control film, achieving narrow viewing angle control while reducing overall panel thickness and manufacturing complexity
Solution Approach 2:
The black matrix structure is given multiple functions: it serves both as the traditional pixel boundary delimiter and as the light control partition for viewing angle management. This multi-functionality reduces the number of separate components needed, thereby reducing thickness and cost
2Reliability
If a light control film is added to achieve narrow viewing angle, then the viewing angle control is improved, but the manufacturing cost increases
Solution Approach 1:
The patent combines the formation of black matrix and light control partitions into a single manufacturing step using one opaque material layer and one patterning process. This merger eliminates the need for separate light control film deposition and patterning steps, reducing manufacturing complexity and cost
Solution Approach 2:
The light control partition pattern is created as a copy of the black matrix pattern through simultaneous patterning. Both structures are formed from the same material layer using the same photolithography process, eliminating the need for additional specialized light control film manufacturing steps
3Length of stationary object
If no light control film is used to reduce thickness and cost, then the product thickness and cost are reduced, but light leakage at side angles occurs and screen reflection may happen
Solution Approach 1:
The patent integrates light control partitions directly into the black matrix structure, creating opaque partitions within the pixel area that block side-angle light without requiring an additional light control film layer, thus maintaining thin profile while preventing light leakage
Solution Approach 2:
The pixel area is segmented into multiple regions by forming light control partitions that divide the liquid crystal layer into distinct zones. These partitions create separate optical paths that control light propagation angles, preventing side-viewing and screen reflection while maintaining front-view visibility
4Ease of manufacture
If no light control film is used to reduce manufacturing cost, then the manufacturing cost is reduced, but light leakage at side angles occurs
Solution Approach 1:
The patent combines the formation of black matrix and light control partitions into a single manufacturing step using one opaque material layer and one patterning process. This merger eliminates the need for separate light control film deposition and patterning steps, reducing manufacturing complexity and cost while effectively preventing light leakage
Solution Approach 2:
The light control partition pattern is created as a copy of the black matrix pattern through simultaneous patterning. Both structures are formed from the same material layer using the same photolithography process, eliminating the need for additional specialized light control film manufacturing steps while achieving effective light control
Data Source
AI summary
Disclosed is a display panel in which a black matrix is formed on an upper substrate, which is disposed so as to face a lower substrate, so as to delimit each pixel area, a plurality of light control partitions is provided in the pixel area of the upper substrate, a color filter is provided in the pixel area of the upper substrate, and an overcoat layer is provided over the entire surface of the upper substrate. The light control partitions are formed in the pixel area simultaneously with the formation of the black matrix, which enables the omission of an existing light control film. Thereby, a narrow viewing angle is realized without increasing the thickness or manufacturing cost of a product.