Transparent Display Signal Line Arrangement for Luminance Uniformity
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Solution Overview
Problem
Transparent display devices face a trade-off between high resolution and light transmittance, as increased signal line and circuit areas in non-transmissive areas reduce the transmissive area and thus light transmittance, and can cause luminance differences between subpixels emitting the same color.
Innovation Solution
The design optimizes the arrangement of signal lines and circuit areas by using overlapping non-transmissive areas to minimize their protrusion into the transmissive area, ensuring sufficient space for circuit components and reducing RC delay, while alternately inputting data to subpixels to maintain uniform luminance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the arrangement areas of signal lines and circuit areas are increased to improve resolution, then the resolution is improved, but the transmissive area is reduced and light transmittance deteriorates
Solution Approach 1:
The patent extends signal lines from the overlapping area of non-transmissive regions into the transmissive area, changing the traditional arrangement where all signal lines are confined to non-transmissive regions. This dimensional change allows signal lines to utilize space in the transmissive area, reducing the need to expand non-transmissive regions and thereby preserving light transmittance while maintaining resolution.
Solution Approach 2:
The patent applies different arrangement strategies to different regions: signal lines are arranged along the non-transmissive area in the overlapping region, while extending into the transmissive area where needed. This local differentiation optimizes the use of available space in each region, allowing the system to achieve high resolution without uniformly reducing the transmissive area.
2Illumination intensity
If signal lines are arranged asymmetrically to minimize area, then the transmissive area is maximized, but luminance differences occur between subpixels of the same color
Solution Approach 1:
The patent intentionally introduces asymmetric dummy signal lines in specific regions to compensate for the asymmetric impact of real signal lines on subpixels. By adding dummy lines on one side, the total signal line coverage becomes more balanced across different subpixel positions, ensuring uniform luminance while maintaining the asymmetric arrangement that preserves transmissive area.
Solution Approach 2:
The patent modifies the parameters of signal lines by adding dummy signal lines with specific widths and positions to adjust the overall signal line distribution. This parameter adjustment ensures that the combined effect of real and dummy signal lines creates symmetric luminance impact on subpixels, resolving the luminance uniformity issue while maintaining area efficiency.
Data Source
AI summary
A transparent display device may optimize arrangement areas of a plurality of signal lines and circuit areas, and may prevent a luminance difference from occurring between subpixels for emitting light of the same color. The transparent display device comprises a substrate provided with transmissive areas, a first non-transmissive area provided between the transmissive areas in a first direction, and a second non-transmissive area provided between the transmissive areas in a second direction, first signal lines provided along the first non-transmissive area in the first non-transmissive area and extended from an overlapping area, in which the first non-transmissive area and the second non-transmissive area cross each other, in a direction crossing the first direction, and second signal lines provided along the second non-transmissive area in the second non-transmissive area and extended from the overlapping area in a direction crossing the second direction. Two adjacent first signal lines are symmetrical with each other with the transmissive area interposed therebetween, and two adjacent second signal lines are symmetrical with each other with the transmissive area interposed therebetween.