Display Pixel Modules With Local Switching for Fewer Wires
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Solution Overview
Problem
Conventional display devices face issues with increased wire disconnection and overlap due to the addition of multiplexer circuits, leading to reduced yield and complexity.
Innovation Solution
The display device incorporates a switching circuit and pixel modules with shared data lines and light emitting controlling signals, reducing the number of data lines and components connected to the same signal wire, thereby minimizing wire disconnections and overlaps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a multiplexer circuit is disposed to switch between pixel circuits, then the number of wiring pads at the border can be reduced, but the number of wires increases leading to disconnections and overlaps
Solution Approach 1:
The patent merges the multiplexer switching function with the existing pixel circuit structure by integrating the switching circuit within each pixel module. This consolidation allows the display device to achieve borderless display with reduced wiring pads while avoiding the complexity increase associated with separate multiplexer circuits, as the switching is performed locally within each pixel module rather than through additional external wiring.
2Adaptability or versatility
If additional signal controlling lines are connected to pixel circuits, then the multiplexer circuit can function, but wire disconnections and overlaps increase reducing yield
Solution Approach 1:
The patent segments the display device into multiple independent pixel modules, each containing its own switching circuit. This segmentation allows each pixel module to operate independently with localized switching control, eliminating the need for additional signal controlling lines that would traverse the entire display area. The segmentation approach maintains adaptability for multiplexer functionality while improving reliability by isolating potential failure points to individual pixel modules rather than affecting the entire display through wire disconnections or overlaps.
3Ease of operation
If the number of wires is increased, then the multiplexer can switch between pixel circuits, but wires are prone to be disconnected or overlapped
Solution Approach 1:
The patent transitions from a traditional planar wiring architecture to a three-dimensional integrated structure where switching circuits are embedded within pixel modules at different layers. This dimensional change allows pixel circuit switching to be achieved through vertical interconnections and local switching transistors within each pixel module, rather than through extensive horizontal wiring. The dimensionality change enables ease of operation for pixel switching while dramatically improving manufacturing precision by eliminating the need for long, vulnerable wire traces that could be disconnected or overlapped.
Data Source
AI summary
A display device includes a plurality of scan lines, a plurality of data lines and a plurality of pixel modules. Each of the pixel modules includes a switching circuit and a plurality of pixel circuits. The switching circuit is electrically connected to one of the scan lines, and receives a scanning signal of the scan lines in one stage. The pixel circuits are electrically connected to the switching circuit, and receive the scanning signal. Each of the pixel circuits includes a light emitting element. One of the pixel circuits and the switching circuit is electrically connected to one of the data lines, and receives a data signal. The switching circuit is controlled by the scanning signal to turn on the pixel circuits, and writes the data signal into each of the pixel circuits in sequence when the pixel circuits are turned on.