Array Substrate Time-Division Multiplexing for High Resolution
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Solution Overview
Problem
The challenge in creating high-resolution display panels is the limitation on reducing sub-pixel size due to process constraints, which hinders the fabrication of more pixel circuits, thereby restricting the increase in visual resolution.
Innovation Solution
The array substrate design incorporates circulating units with four sub-pixel units, where each unit shares a pixel circuit to drive two sub-pixels of the same color, allowing for time-sharing of pixel circuits to display different frame pictures, reducing the number of required pixel circuits and increasing sub-pixel units per area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of pixel circuits is increased to improve resolution, then the visual resolution is improved, but the manufacturing complexity and cost increase due to process constraints on fabricating more pixel circuits
Solution Approach 1:
The patent merges the function of two pixel circuits into one by implementing a sharing mechanism where a single pixel circuit drives two sub-pixel units of the same color through time-division multiplexing. This reduces the total number of pixel circuits required while maintaining the ability to display high-resolution images by alternating between the two sub-pixel units within the same circulating unit.
Solution Approach 2:
The patent employs periodic action through time-division multiplexing, where the pixel circuit alternates between driving the first and second sub-pixel units in different frames. This periodic switching allows one pixel circuit to effectively serve two sub-pixel units, reducing the overall circuit count while preserving resolution through sequential activation.
2Measurement precision
If the sub-pixel size is decreased to increase the number of pixels per unit area, then the resolution is improved, but the manufacturing process constraints prevent further size reduction
Solution Approach 1:
The patent transitions from spatial dimension optimization to temporal dimension utilization. Instead of continuously reducing sub-pixel size in the spatial domain, the invention uses time-division multiplexing in the temporal domain, allowing one pixel circuit to control two sub-pixel units sequentially. This dimensional shift enables resolution improvement without further sub-pixel size reduction.
Solution Approach 2:
The patent changes the operational parameter from static sub-pixel size to dynamic time-sharing control. By altering how pixel circuits are allocated and controlled over time rather than changing physical dimensions, the system achieves higher effective resolution while maintaining manufacturable sub-pixel sizes within existing process constraints.
3Measurement precision
If more sub-pixel units are fabricated per unit area to increase resolution, then the visual resolution is improved, but the number of pixel circuits cannot be increased accordingly due to area limitations
Solution Approach 1:
The patent merges multiple pixel circuit functions into a single circuit through the sharing mechanism. Within each circulating unit, one pixel circuit is shared between two sub-pixel units of the same color, allowing more sub-pixel units to be packed into the display area without proportionally increasing the number of pixel circuits, thus improving resolution within area constraints.
Solution Approach 2:
The pixel circuit is designed with multi-functionality to drive different sub-pixel units at different times. The same pixel circuit can control either the first or second sub-pixel unit depending on the frame timing, making it a universal controller that serves multiple functions and reduces the total circuit count needed for high-resolution display.
Data Source
AI summary
The invention provides an array substrate and a driving method thereof, a display panel and a display device. The array substrate comprises a plurality of circulating units and a plurality of pixel circuits. Each circulating unit consists of four sub-pixel units located in four columns and two rows, sub-pixel units in any two adjacent columns are located in different rows and have different colors, and sub-pixel units in at least one row have different colors. Each sub-pixel unit is connected to one pixel circuit, and each sub-pixel unit comprises a first sub-pixel and a second sub-pixel located in the same column and having the same color. The pixel circuit is configured to drive the first sub-pixel when a first frame picture is displayed, and to drive the second sub-pixel when a second frame picture is displayed.