Transparent Display Anode Layout for Subpixel Repair Without Light Loss
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Solution Overview
Problem
Transparent display devices face a reduction in light transmittance due to the presence of repair lines, which are necessary to address defective subpixels, leading to a decrease in the size of the transmissive area and subsequent deterioration of light transmission.
Innovation Solution
The design incorporates a substrate with transmissive and non-transmissive areas, featuring subpixels with a driving transistor, capacitor, and an anode line that overlaps adjacent subpixels, allowing for the connection of defective subpixels without reducing the size of the transmissive area, thereby maintaining high light transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a repair line is added to connect defective subpixels, then the reliability of the display device is improved, but the area of the transmissive area is reduced and light transmittance is deteriorated
Solution Approach 1:
The anode line is extended into the third dimension by making it overlap with adjacent subpixels in the vertical direction. This spatial arrangement allows the repair line to function without occupying horizontal space that would reduce the transmissive area, effectively moving the repair functionality to a different dimensional plane.
Solution Approach 2:
The anode line serves dual functions: it acts as both a power supply conductor for the subpixels and a repair line for connecting defective subpixels. By merging these two functions into a single structural element, the design eliminates the need for separate repair lines that would consume additional transmissive area.
2Ease of repair
If a repair line is added to connect defective subpixels, then the ease of repair is improved, but the light transmittance is deteriorated
Solution Approach 1:
The repair functionality is achieved by extending the anode line to overlap adjacent subpixels vertically, creating a three-dimensional conductive path. This approach enables repair capabilities without adding horizontal line elements that would block light transmission, thus maintaining high light transmittance while improving ease of repair.
3Reliability
If the transmissive area is reduced to accommodate repair lines, then the reliability is improved, but the productivity of light transmission is reduced
Solution Approach 1:
The anode line is designed to simultaneously serve as both a power supply conductor and a repair line for defective subpixels. This merging of functions eliminates the need for separate repair lines, thereby preserving the transmissive area and maintaining high light transmission efficiency while still providing reliable defective subpixel operation.
Solution Approach 2:
By arranging the anode line to overlap adjacent subpixels in the vertical dimension rather than extending it horizontally, the design maintains maximum transmissive area for light transmission while still enabling repair functionality through the vertically stacked conductive path.
Data Source
AI summary
A transparent display device may prevent deterioration of light transmittance, which is caused by a repair line, from occurring. The transparent display device comprises a substrate provided with transmissive areas, a non-transmissive area disposed between the transmissive areas, and a plurality of subpixels disposed in the non-transmissive area, a first electrode provided in each of the plurality of subpixels, a driving transistor connected with the first electrode of each of the plurality of subpixels, including an active layer, a gate electrode, a source electrode and a drain electrode, a capacitor connected to the driving transistor of each of the plurality of subpixels, including a first capacitor electrode and a second capacitor electrode, and an anode line extended from the first electrode of each of the plurality of subpixels to at least partially overlap a driving transistor or a capacitor of an adjacent subpixel of the same color.