Transparent Display Device Signal Line Overlap
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Solution Overview
Problem
Transparent display devices face a trade-off between high resolution and transmittance, with increased resolution leading to reduced transmittance and visible subpixel intervals degrading picture quality.
Innovation Solution
A transparent display device design featuring a transmissive area between signal line portions and optimized pixel arrangement, where pixels are positioned at intersections of signal lines to enhance transmittance while maintaining high resolution and preventing subpixel interval visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the resolution of the transparent display device is increased, then the image quality is improved, but the transmittance is reduced
Solution Approach 1:
The display area is divided into multiple subpixels (red, green, blue) arranged in a specific pattern, allowing high resolution through fine segmentation while maintaining transmittance by optimizing the segmentation layout to minimize non-transmissive areas
Solution Approach 2:
Different regions of the display are optimized with varying line widths and spacing configurations. The signal lines have different widths in different areas, and the spacing between subpixels is locally adjusted to balance resolution requirements with transmittance optimization in specific regions
2Illumination intensity
If the spaced distance between subpixels is increased to improve transmittance, then the transmissive area is enlarged, but the subpixel intervals become visible and picture quality is degraded
Solution Approach 1:
The subpixels are arranged in an asymmetric pattern where the spacing and positioning are optimized to prevent visible intervals. The red, green, and blue subpixels are positioned at specific asymmetric locations relative to each other and to the signal lines, creating a layout that maintains high transmittance while preventing moire effects and visible pixel boundaries
Solution Approach 2:
The problem of visible subpixel intervals is solved by considering the three-dimensional arrangement including the overlapping areas of signal lines and pixels. The pixels are positioned at intersections or overlapping areas of signal lines, utilizing the vertical dimension and layer overlap to reduce visible intervals while maintaining transmittance
3Measurement precision
If more signal lines are added to achieve high resolution, then the resolution is improved, but the non-transmissive areas increase and transmittance is reduced
Solution Approach 1:
Multiple signal lines (initialization line, light emission control line, sensing scan lines) are merged and arranged to overlap with each other. The light emission control line overlaps the initialization line in at least a partial area, reducing the total non-transmissive area while maintaining all necessary signal transmission functions for high resolution
Solution Approach 2:
The signal lines are designed to perform multiple functions. For example, the initialization line and light emission control line share overlapping regions, and the same line structures serve both signal transmission and pixel definition purposes, reducing the need for separate dedicated lines and minimizing non-transmissive areas
Data Source
AI summary
A transparent display device may have high transmittance and at the same time have high resolution. The transparent display device comprises a first signal line portion extended in a first direction, including a first sensing scan line, a second sensing scan line, an initialization line and a light emission control line, a second signal line portion extended in a second direction, a transmissive area provided between two adjacent first signal line portions and between two adjacent second signal line portions, and a pixel provided in an intersection area where the first signal line portion and the second signal line portion cross or overlap each other. The light emission control line overlaps the initialization line in at least a partial area.