OLED Display Module with Overlapping Signal Lines for Transparent Subpixels
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Solution Overview
Problem
The transmittance of OLED displays is limited when an optical component is positioned on the back, reducing the amount of light received by the optical component and affecting its performance.
Innovation Solution
A display module design with alternating first and second signal lines that overlap in transparent subpixel regions, reducing diffraction gratings and increasing the area of transparent subpixels, thereby enhancing light transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the optical component is disposed on the back of the OLED display, then the structure is simplified, but the transmittance of the OLED display is limited and the amount of light received by the optical component is reduced
Solution Approach 1:
The display area is segmented into light-emitting subpixel areas and transparent subpixel areas. The transparent subpixel areas are specifically positioned in regions where optical components are located on the back, allowing these segments to transmit light to the optical components while other segments maintain normal light emission functions.
Solution Approach 2:
Different areas of the display are given different optical properties: light-emitting subpixel areas emit light for display purposes, while transparent subpixel areas have enhanced light transmittance properties to allow light to pass through to optical components on the back. This local differentiation resolves the contradiction by optimizing each area for its specific function.
2Ease of manufacture
If signal lines are arranged in conventional non-overlapping patterns, then manufacturing is simpler, but diffraction gratings are formed that affect light transmission
Solution Approach 1:
The orthographic projections of adjacent signal lines are merged to overlap in the transparent subpixel areas. This merging eliminates the periodic spacing that creates diffraction gratings, thereby improving light transmission through the transparent subpixel areas to the optical components on the back.
Solution Approach 2:
The signal line arrangement is optimized in the vertical dimension (orthographic projection overlap) specifically in the transparent subpixel areas, while maintaining conventional horizontal spacing. This dimensional differentiation allows signal lines to be manufactured using conventional processes while eliminating diffraction effects in the critical light transmission paths.
3Illumination intensity
If transparent subpixel area is increased to improve light transmission, then optical component performance is enhanced, but the area available for light-emitting subpixels is reduced
Solution Approach 1:
The display area is segmented into light-emitting subpixel areas and transparent subpixel areas, with each segment optimized for its specific function. This segmentation allows the transparent subpixel areas to be positioned precisely where optical components are located on the back, maximizing light transmission to these components without compromising the overall display area.
Solution Approach 2:
Different areas are assigned different functions: light-emitting subpixel areas maintain normal display functions, while transparent subpixel areas positioned in optical component regions provide enhanced light transmission. This local quality differentiation resolves the area contradiction by optimizing each region for its specific purpose.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Improves the daylighting effect of optical components by increasing the transmittance of the OLED display, allowing for better light reception and performance.
Implementation Method 1
orthographic projections of the first signal line and the second signal line on the substrate overlap in a region in which the transparent subpixel is located. In this embodiment of this application, structures of the first signal line and the second signal line are adjusted, so that the orthographic projections of the first signal line and the second signal line on the substrate overlap in the region in which the transparent subpixel is located, and an overlapping part of the orthographic projections of the first signal line and the second signal line does not form a diffraction grating
Data Source
AI summary
A display system includes a substrate, a plurality of first signal lines and a plurality of second signal lines. The second signal lines and the first signal lines are extended in a same direction and are insulated from each other. At least one first subpixel array is also disposed on the substrate. A first signal line group is disposed between adjacent rows of subpixels in the first subpixel array, and the first signal line group includes one first signal line and one second signal line. The first signal line and the second signal line in at least one first signal line group on the substrate overlap in a region having a transparent subpixel.