Integrated Display-Sensing Circuit for Compact Fingerprint Sensing
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Solution Overview
Problem
Current electronic devices face challenges in integrating high-resolution display and high-definition sensing functions due to separate display and sensor circuits occupying significant space, leading to inefficient space utilization.
Innovation Solution
An electronic device design that integrates a substrate with a first conductive layer, electronic units, and sensor units, along with dedicated driving circuits, where the shape of the first gate in the sensor unit driving circuit differs from the line segment, allowing for shared space utilization and efficient operation of both functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate display circuit and sensor circuit are used, then display function and sensing function can be independently implemented, but space utilization becomes low and device area increases
Solution Approach 1:
The patent merges the display circuit and sensor circuit into a single integrated circuit structure. The same circuit elements (transistors, conductive layers, substrates) are used to perform both display driving functions and sensing functions, thereby reducing the overall device area while maintaining functional independence through shared resources.
Solution Approach 2:
The circuit elements are designed with multi-functionality, where the first conductive layer serves as both a display circuit component and a sensing circuit component. The transistors and conductive structures perform dual roles: driving display pixels and detecting touch or proximity events, eliminating the need for separate dedicated circuits.
2Measurement precision
If high-resolution display and high-definition sensing are both implemented with separate circuits, then both functions achieve high quality, but space utilization becomes inefficient
Solution Approach 1:
The patent combines high-resolution display circuitry and high-definition sensing circuitry into a single integrated structure. The shared circuit elements are designed to support both high display resolution and high sensing precision simultaneously, achieving dual high-quality performance without requiring separate physical circuits that would consume excessive space.
3Ease of manufacture
If the first gate shape is the same as the line segment shape, then manufacturing is simpler, but space utilization and sensing accuracy are reduced
Solution Approach 1:
The patent employs asymmetric gate structures where the first gate has a shape different from the line segment. This asymmetric design optimizes the spatial arrangement of circuit elements, improving space utilization and enhancing sensing accuracy by creating distinct electrical field patterns, while remaining compatible with standard manufacturing processes.
Data Source
AI summary
An electronic device includes a substrate, a first conductive layer, an electronic unit, a sensor unit and a sensor unit driving circuit. The first conductive layer is disposed on the substrate, and includes a first gate and a line segment connected to the first gate. The electronic unit and the sensor unit are disposed on the substrate. The sensor unit driving circuit is disposed on the substrate, and is electrically connected to the electronic unit and the sensor unit. The sensor driving circuit includes a first transistor with the first gate, and a shape of the first gate is different from a shape of the line segment.