Shared Light Emitting Control Sub-Circuit for OLED Display Substrate Layout
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Solution Overview
Problem
The challenge in developing special-shaped OLED display products is the space occupation by gate driving circuits, which affects the resolution and compatibility with Gate On Array (GOA) logic resources.
Innovation Solution
The display substrate design includes subpixels arranged in groups, where two subpixels share a common light emitting control sub-circuit and signal line, reducing the number of light emitting control sub-circuits and lines, and optimizing the layout to minimize space usage, while maintaining high-resolution display capabilities and compatibility with GOA logic.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If each subpixel has its own light emitting control sub-circuit, then the control precision and reliability are improved, but the layout space occupied by subpixels increases
Solution Approach 1:
Two adjacent subpixels share a common light emitting control sub-circuit, merging the control functions of individual subpixels into a shared circuit. This reduces the total number of control circuits and their associated signal lines, thereby decreasing the layout space while maintaining control precision through the shared circuit's ability to independently control each subpixel's light emitting process
Solution Approach 2:
The shared light emitting control sub-circuit is designed to perform multiple functions by controlling different subpixels at different times or in different modes. The circuit can sequentially or simultaneously manage the light emitting control signal lines for multiple subpixels, making a single circuit serve multiple purposes and reducing overall space requirements
2Area of moving object
If the number of light emitting control sub-circuits is reduced, then the layout space is reduced, but the device complexity increases due to shared circuit design
Solution Approach 1:
The light emitting control function is segmented into modular sub-circuits that can be shared among multiple subpixels. Each sub-circuit is designed as an independent functional unit that can be replicated and shared, reducing overall complexity compared to fully independent circuits while maintaining manageable design increments
Solution Approach 2:
The patent introduces a time dimension to the control mechanism, where the shared light emitting control sub-circuit operates at different time intervals to control different subpixels. This temporal multiplexing allows a single circuit to manage multiple subpixels without requiring simultaneous independent control paths, thereby reducing spatial complexity
Data Source
AI summary
A display substrate includes: a substrate and a plurality of subpixels arranged on the substrate, the plurality of subpixels are arranged in an array; the subpixel includes a subpixel driving circuit and a light emitting element, and the subpixel driving circuit includes a driving sub-circuit and a light emitting control sub-circuit coupled to each other; the light emitting element includes an anode pattern; the plurality of subpixels are divided into a plurality of groups of subpixels, each group of subpixels includes two subpixels arranged along a first direction, and two subpixel driving circuits included in the two subpixels share a same light emitting control sub-circuit, the light emitting control sub-circuit is configured to respectively control the driving sub-circuits in the two subpixels to write a driving signal to the anode pattern; the subpixel further includes a data line including a part extending along the first direction.