OLED Display Substrate Narrow Frame Layout via Electrode Overlap
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Solution Overview
Problem
The existing design of OLED display panels faces challenges in achieving a narrow frame due to the size constraints of the bottom frame, particularly in the region where data driving circuits are located, which limits the reduction of the display panel's frame size.
Innovation Solution
The proposed solution involves a display substrate with a base substrate and reset signal lines, where the orthographic projections of the light-emitting element electrodes overlap with the pixel driving circuits on the same side as the reset signal lines, allowing the light-emitting elements to be positioned without occupying the lower frame space, thereby reducing the frame size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the light-emitting elements are positioned in the lower frame region, then the display area is maximized, but the frame size cannot be reduced further
Solution Approach 1:
The patent repositions the light-emitting elements from the lower frame region to overlap with the pixel driving circuits in the vertical dimension. This dimensional rearrangement allows the light-emitting elements to occupy space above the driving circuits rather than extending the frame width, thereby reducing the frame size while maintaining display area.
Solution Approach 2:
The patent implements a nested structure where the orthographic projections of the light-emitting element electrodes overlap with the pixel driving circuits. The light-emitting elements are effectively positioned within the vertical space occupied by the driving circuits, allowing compact integration without increasing frame size.
2Length of stationary object
If the frame size is reduced to achieve narrow frame display, then the portability and viewing angle are improved, but the layout complexity of the display substrate increases
Solution Approach 1:
The patent merges the positioning of light-emitting elements with the pixel driving circuit layout. By allowing the orthographic projections to overlap, the design combines two previously separate spatial requirements into a unified configuration, simplifying the overall layout process while achieving narrow frame dimensions.
Solution Approach 2:
The patent applies different spatial arrangements to different regions: the light-emitting element electrodes are positioned to overlap with driving circuits in specific local areas, while maintaining proper electrical connections and functional separation where needed. This localized optimization reduces overall layout complexity.
Data Source
AI summary
A display substrate and a display device are provided, which includes: a base substrate, a plurality of reset signal lines and a first electrode layer, the first electrode layer includes a plurality of first power supply voltage lines, a plurality of first signal lines, a plurality of first transfer electrodes, a plurality of second transfer electrodes and a plurality of third transfer electrodes, a value of a ratio of an area of an overlapping portion of an orthographic projection of the first body sub-portion and an orthographic projection of the first electrode layer on the board surface of the base substrate, and an area of an overlapping portion of an orthographic projection of the second body sub-portion on the board surface of the base substrate and the orthographic projection of the first electrode layer on the board surface of the base substrate ranges from 0.82 to 1.02.