Shared Light Emitting Control Lines for High-Resolution OLED Substrates
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Solution Overview
Problem
Current OLED display devices require a large number of light emitting control lines, which occupy significant space on the substrate and increase the risk of parasitic capacitance and short-circuit defects, hindering the achievement of high resolution.
Innovation Solution
The display substrate design includes a base substrate with pixels sharing a light emitting control line and a power supply line, where the light emitting control circuits of adjacent rows share the same light emitting control line, reducing the number of control lines needed and optimizing the substrate layout.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If each pixel has independent light emitting control lines, then each pixel can be controlled independently, but the number of control lines increases significantly occupying substrate area
Solution Approach 1:
The patent merges the light emitting control lines of adjacent pixels into shared control lines. Specifically, pixels in the same column share a common light emitting control line, and pixels in adjacent rows share common control lines through the pixel driving circuit. This merging reduces the total number of control lines from potentially thousands to a manageable number, significantly freeing up substrate area while maintaining control functionality through the shared circuit architecture.
2Adaptability or versatility
If more light emitting control lines are arranged on the substrate, then more pixels can be controlled, but the risk of parasitic capacitance and short-circuit defects increases
Solution Approach 1:
By merging control lines for multiple pixels into shared lines, the patent reduces the total number of control lines on the substrate. This reduction directly decreases the number of potential failure points, lowering the risk of short-circuit defects and reducing parasitic capacitance effects that would otherwise accumulate with more lines. The shared control architecture maintains full pixel control capability while improving substrate reliability.
3Manufacturing precision
If a large number of light emitting control lines are used, then high resolution display can be achieved, but the substrate area occupied by control lines increases
Solution Approach 1:
The patent implements a shared control line architecture where multiple pixels share common light emitting control lines. This merging approach dramatically reduces the number of control lines required on the substrate, freeing up significant area that would otherwise be occupied by densely packed control lines. The high resolution display capability is maintained through the shared circuit design that can independently control each pixel via the pixel driving circuit while using fewer physical control lines.
Data Source
AI summary
A display substrate and a display device are provided. The display substrate includes: a base substrate; a plurality of pixels; and a light emitting control line and a first power supply line which are electrically connected to a light emitting control circuit of the pixel. The light emitting control circuits of pixels located in two adjacent rows share the same light emitting control line. The light emitting control circuit includes a light emitting control transistor, the gate of the light-emitting control transistor is electrically connected to the light emitting control line, one of the first electrode and the second electrode of the light emitting control transistor is connected to the first power supply line, and the first power supply line extends in parallel to the light emitting control line.