Transparent Display Layout for Yellowish Non-Display Areas
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Solution Overview
Problem
Transparent display devices exhibit lower light transmittance in the non-display area due to the presence of signal lines and insulating films, which also cause a yellowish phenomenon.
Innovation Solution
The device includes a substrate with a display area and a non-display area, featuring a gate driver and metal lines, with trenches between the gate driver and the display area, and insulating films with open areas to improve transmittance and prevent yellowish tint.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If signal lines are disposed in the non-display area, then the gate driver can be provided in the non-display area, but light transmittance in the non-display area is lowered
Solution Approach 1:
The patent applies local quality by creating a transmissive area within the non-display area where signal lines are selectively disposed. The insulating film is removed only in specific regions to allow light transmission while maintaining the gate driver functionality. This resolves the contradiction by making different parts of the non-display area have different optical properties - some regions transmit light while others contain the necessary circuitry.
Solution Approach 2:
The non-display area is segmented into multiple regions: a transmissive area where light can pass through, and non-transmissive areas where signal lines and gate driver components are located. This segmentation allows the gate driver to be integrated in the non-display area while preserving light transmittance in specific zones where it is not obstructed by circuit elements.
2Reliability
If insulating film is provided in the non-display area, then electrical insulation is achieved, but yellowish phenomenon occurs reducing light transmittance
Solution Approach 1:
The patent extracts the insulating film from the transmissive area of the non-display area, completely removing it to eliminate the yellowish phenomenon. The insulating film is retained only in non-transmissive areas where it is not needed for light transmission. This extraction resolves the contradiction by eliminating the harmful optical effect of the insulating film while maintaining electrical insulation where required.
Solution Approach 2:
Different regions of the non-display area are assigned different insulating film configurations: the transmissive area has no insulating film to maximize light transmission, while other areas retain the insulating film for electrical insulation. This local differentiation resolves the contradiction between electrical insulation requirements and light transmittance needs.
3Reliability
If metal lines are provided in the non-display area, then electrical connections are established, but light transmittance is reduced
Solution Approach 1:
Metal lines are disposed only in non-transmissive areas of the non-display area, while the transmissive area remains free of metal lines to maintain high light transmission. This spatial separation resolves the contradiction by concentrating electrical connections in regions where they do not interfere with light transmission.
Data Source
AI summary
A transparent display device is disclosed, which may reduce a yellowish phenomenon in a non-display area. The transparent display device comprises a substrate provided with a display area in which a plurality of subpixels are disposed, and a non-display area adjacent to the display area, a gate driver provided in the non-display area over the substrate, including a plurality of stages, a metal line provided between the gate driver and the display area, and a trench provided between the metal line and the display area.