Display Device Signal Line Layer Stacking Aperture Ratio
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Solution Overview
Problem
In RGBW display devices, the aperture ratios of red and green sub-pixels are smaller than those of white and blue sub-pixels, leading to reduced numerical aperture and display efficiency.
Innovation Solution
The display device design includes a configuration where signal lines are formed by a different layer than the scan lines, allowing for overlapping and stacking arrangements that increase the opening areas of red and green sub-pixels, thereby enhancing their aperture ratios and numerical aperture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If signal lines are formed in the same layer as scan lines, then device structure is simpler, but aperture ratios of red and green sub-pixels become smaller
Solution Approach 1:
The patent applies dimensionality change by forming the second signal line in a different layer than the scan line, creating a three-dimensional stacked arrangement. This allows the signal lines to overlap with the third signal line in plan view while being separated in the vertical dimension, thereby increasing the opening areas of red and green sub-pixels without complicating the planar layout.
2Measurement precision
If aperture ratios of red and green sub-pixels are increased, then numerical aperture is improved, but device structure becomes more complex
Solution Approach 1:
The patent implements nesting by placing the second signal line within the spatial envelope defined by the scan line and third signal line. The second signal line is formed in a different layer to overlap with the third signal line, creating a nested, space-efficient configuration that increases aperture ratios without proportionally increasing overall device complexity.
Data Source
AI summary
A display device includes: a scan line extending in a first direction; first, second and third signal lines extending in a second direction; a first sub-pixel connected to the scan line and the first signal line; a second sub-pixel connected to the scan line and the second signal line; and a third sub-pixel connected to the scan line and the third signal line. The second signal line disposed between the first sub-pixel and the third sub-pixel is formed by a different layer so as to overlap with the third signal line as viewed in a plan view.