Display Panel Pressure Detection Wiring Area Reduction
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Solution Overview
Problem
Conventional pressure sensors in display panels occupy a significant area with multiple outputting and inputting wires, making it challenging to achieve a narrow frame in portable electronic devices.
Innovation Solution
The display panel incorporates cascaded shift registers and switching circuits with shared outputting wires, allowing pressure detection signals from multiple pressure detecting units to be transmitted through a single outputting wire, reducing the number of wires and occupied area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional pressure sensors with multiple outputting and inputting wires are used, then pressure detection functionality is achieved, but the frame area is occupied and widened
Solution Approach 1:
Multiple outputting wires from different pressure detecting units are merged into a single shared outputting wire. The switching circuit selectively connects different pressure detecting units to this shared wire at different time points, enabling multiple sensors to share one wire and thus reducing the number of wires needed in the frame area.
Solution Approach 2:
The patent introduces dynamic switching control where the switching circuit changes connections over time. Different pressure detecting units are connected to the shared outputting wire at different time points under control signals, transforming a static multi-wire configuration into a dynamic single-wire configuration that maintains functionality while reducing space.
2Measurement precision
If multiple outputting wires are extended from each pressure sensor, then accurate pressure detection is achieved, but the wiring occupies significant area
Solution Approach 1:
The patent merges multiple outputting wires into a single shared wire by using a switching circuit that connects different pressure detecting units to the same wire at different time points. This time-division multiplexing approach maintains measurement precision while significantly reducing the number of physical wires needed.
Solution Approach 2:
The patent transitions from a spatial arrangement where each pressure sensor has dedicated wires to a temporal arrangement where multiple sensors share a wire through time-division multiplexing. This adds the time dimension to the wiring solution, allowing multiple connections to be achieved through a single physical wire by switching at different time points.
3Adaptability or versatility
If pressure sensors are disposed around the display screen, then pressure detection coverage is improved, but the non-display region area increases
Solution Approach 1:
Multiple pressure detecting units disposed around the display screen are connected through a shared outputting wire with switching circuit control. This merging of wire connections reduces the total wire routing area in the non-display region while maintaining the ability to detect pressure at multiple locations around the screen.
Solution Approach 2:
The shared outputting wire serves multiple pressure detecting units simultaneously through time-division multiplexing. This universal wire configuration allows a single wire to fulfill the function of multiple dedicated wires, reducing the overall area required for wire routing in the non-display region.
Data Source
AI summary
Provided are a display panel and an electronic device, and the display panel includes: shift registers, pressure detecting units and switching circuits; the switching circuit includes a first switching transistor and a second switching transistor, and a control terminal of the first switching transistor is electrically connected with an outputting terminal of one of the shift registers and an inputting terminal of the first switching transistor is electrically connected to a first outputting terminal of the corresponding pressure detecting unit, and a control terminal of the second switching transistor is electrically connected to an outputting terminal of one of the shift registers and an inputting terminal of the second switching transistor is electrically connected to a second outputting terminal of corresponding pressure detecting unit.