AMOLED Array Substrate Dummy Pixel Elimination
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Solution Overview
Problem
Current display technologies face complexity and space utilization challenges in designing array substrates for active matrix organic light-emitting diodes (AMOLEDs, particularly due to the need for dummy sub-pixels and additional signal lines, which complicate the design and increase manufacturing costs.
Innovation Solution
The array substrate design eliminates non-luminous dummy sub-pixels and simplifies signal line connections by using a layout where each row of luminous sub-pixels is connected to distinct gate and reset signal lines, with gate drive circuits arranged in a cascaded manner to enable flexible and efficient progressive driving, reducing wiring complexity and manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dummy sub-pixels and additional signal lines are used, then display functionality is ensured, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent removes dummy sub-pixels from the display structure, extracting only the necessary luminous sub-pixels. This eliminates the need for additional signal lines connected to non-functional elements, thereby reducing wiring complexity while maintaining display functionality through the remaining luminous sub-pixels connected to gate and reset signal lines.
Solution Approach 2:
The gate drive circuits are designed to serve multiple functions: they provide gate signals to gate lines and reset signals to reset signal lines simultaneously. This multi-functionality reduces the need for separate dedicated circuits for each signal type, simplifying the overall device structure while ensuring proper display operation.
2Area of stationary object
If dummy sub-pixels are added, then display area coverage is improved, but manufacturing cost increases
Solution Approach 1:
The patent extracts and eliminates dummy sub-pixels from the display structure, retaining only luminous sub-pixels that contribute to actual display output. This reduces manufacturing complexity and costs associated with producing and assembling non-functional dummy elements, while the display area coverage is maintained through optimized arrangement of the luminous sub-pixels.
3Reliability
If additional signal lines are used, then sub-pixel control is improved, but space utilization deteriorates
Solution Approach 1:
The gate drive circuits are designed to serve multiple functions: they provide gate signals to gate lines and reset signals to reset signal lines simultaneously. This multi-functionality reduces the number of separate signal lines needed, improving space utilization while maintaining proper sub-pixel control through the shared circuits.
Solution Approach 2:
The patent merges the functions of gate drive circuits to simultaneously control both gate lines and reset signal lines. By combining these control functions into unified circuits, the number of separate signal lines is reduced, thereby improving space utilization in the display structure.
Data Source
AI summary
A display area of the array substrate only includes first sub-pixels capable of emitting light. In each two adjacent rows of first sub-pixels, a gate line electrically connected to one row of the plurality of rows of first sub-pixels and a reset signal line electrically connected to another row of the plurality of rows of first sub-pixels are electrically connected to the same first gate drive circuit. A target line electrically connected to a first row of the plurality of rows of first sub-pixels (i.e., another line other than the line electrically connected to the first gate drive circuit) is electrically connected to a second gate drive circuit. A target line electrically connected to a last row of the plurality of rows of first sub-pixels (i.e., another line other than the line electrically connected to the first gate drive circuit) is electrically connected to a third gate drive circuit.