Signal Line Routing for Light Transmissive Display Areas
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Solution Overview
Problem
Display devices with integrated light transmissive areas, such as cameras, experience luminance deviations and increased dead space due to the placement of signal lines around these areas, which affects image quality and efficiency.
Innovation Solution
The design includes a substrate with a display area and a light transmissive area, where signal lines are arranged in a specific pattern with different directions and lengths, and connected to resistors in disconnection corresponding areas to minimize luminance deviations and reduce dead space by optimizing signal delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If signal lines are arranged around the light transmissive area, then electrical connection with pixels is achieved, but dead space area increases and luminance deviation occurs
Solution Approach 1:
The patent applies asymmetry by making the third signal line have a different length than the second signal line in the first direction. Specifically, the third signal line extends further than the second signal line, creating an asymmetric arrangement that optimizes the routing around the light transmissive area. This asymmetric design reduces the dead space area while maintaining proper electrical connections and minimizing luminance deviation in the displayed image.
2Reliability
If signal lines are insulated from each other, then signal interference is reduced, but routing complexity increases
Solution Approach 1:
The patent utilizes multiple dimensions for signal line arrangement by having signal lines extend in different directions (first direction and second direction) and by arranging them at different positions relative to the light transmissive area. The third signal line is arranged in the second direction while the second signal line is arranged in the first direction, creating a multi-dimensional routing scheme that maintains signal integrity through insulation while managing routing complexity through spatial optimization.
Data Source
AI summary
A display device includes a substrate including a display area including pixels, and a light transmissive area including a portion in the display area, and signal lines disposed in the display area and electrically connected with the pixels, where the signal lines include a first signal line on a first side, a second signal line on a second side and arranged with the first signal line in a first direction, and a third signal line on a third side, and the third signal line is arranged with the first signal line and the second signal line in a second direction, the first and second signal lines are insulated from each other in the display area, and a length of the third signal line is longer than a length of the second signal line in the first direction.