Transparent Display Device Repair Line Management
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Solution Overview
Problem
Transparent display devices face a reduction in light transmittance due to the presence of repair lines, which deteriorate the performance of the transmissive area.
Innovation Solution
The design incorporates a transparent display device with a specific arrangement of signal lines, subpixels, and anode lines, where the subpixels have inclined sides and an anode line is extended from each subpixel to overlap with the circuit area of adjacent subpixels, minimizing the impact of repair lines on light transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a repair line is introduced to handle defective subpixels using the WDR technique, then the reliability of the display device is improved, but the light transmittance of the transmissive area is deteriorated
Solution Approach 1:
The harmful effect of the repair line on light transmittance is extracted and isolated by positioning it exclusively in the non-transmissive area, away from the transmissive area. This separates the repair function from the light transmission path, allowing the repair line to exist without compromising transmittance.
Solution Approach 2:
The display area is divided into distinct regions with different optical properties: a transmissive area with high light transmittance and a non-transmissive area with lower transmittance. The repair line is localized to the non-transmissive area, ensuring that the local quality (transparency) is optimized for each region's specific function.
2Illumination intensity
If the transmissive area is enlarged to improve light transmittance, then the illumination intensity is improved, but the area available for signal lines and circuits is reduced
Solution Approach 1:
The problem is resolved by utilizing the vertical dimension and spatial arrangement: signal lines are positioned in the non-transmissive area while the transmissive area remains clear. This dimensional separation allows both the transmissive area to be enlarged for better light transmission and sufficient space to be allocated for signal lines in the non-transmissive region.
3Illumination intensity
If signal lines are positioned to minimize light transmittance loss, then the illumination intensity is improved, but the connectivity and reliability of signal transmission may be compromised
Solution Approach 1:
The non-transmissive area serves as an intermediary zone that accommodates signal lines and circuits without interfering with the transmissive area's optical performance. This mediator region allows robust signal line routing and connectivity while maintaining the high light transmittance required in the display area.
Data Source
AI summary
A transparent display device that may prevent deterioration of light transmittance, which is caused by a repair line, from occurring. The transparent display device comprises a plurality of first signal lines extended in a first direction and spaced apart from each other, a plurality of second signal lines extended in a second direction and spaced apart from each other, a transmissive area provided between two adjacent first signal lines and between two adjacent second signal lines, a pixel including a plurality of subpixels disposed based on an overlapping area where the first signal line and the second signal line cross each other, a first electrode provided in each of the plurality of subpixels, including a first side and a second side, which are disposed to be adjacent to the transmissive area and have an inclination with respect to each of the first signal line and the second signal line, a circuit area connected with the first electrode through a contact hole disposed to be adjacent to the first side of the first electrode, and an anode line extended from the second side of the first electrode of each of the plurality of subpixels and at least partially overlapped with a circuit area of an adjacent subpixel of the same color.