GOA Circuit Timing for Fingerprint Integration
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Solution Overview
Problem
The integration of fingerprint recognition modules into display panels necessitates additional driving circuits, increasing the width of border regions and contradicting the trend of narrow borders in full-screen displays.
Innovation Solution
A driving circuit with multilevel cascading sub-circuits that separately output display driving signals and fingerprint driving signals in different timing, allowing for independent control and simplification of the driving circuit structure, thereby reducing the occupied border region size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fingerprint recognition modules are integrated into display panels, then fingerprint recognition functionality is achieved, but border region width increases
Solution Approach 1:
The patent combines the fingerprint driving circuit functions with the existing display driving circuit by sharing the same GOA circuit structure. The driving circuit uses different timing sequences to drive both display pixels and fingerprint recognition electrodes through shared gate lines, eliminating the need for separate fingerprint driving circuits and reducing border region width.
Solution Approach 2:
The GOA circuit is designed to perform multiple functions: it can drive display pixels during normal display operation and drive fingerprint recognition electrodes during fingerprint recognition operation. The circuit achieves this through configurable timing control, where the same hardware infrastructure serves dual purposes at different time intervals.
2Adaptability or versatility
If separate fingerprint driving circuits are added, then fingerprint recognition is enabled, but device complexity increases
Solution Approach 1:
The patent merges the fingerprint driving circuit functionality into the existing display GOA circuit. By sharing gate lines, source lines, and switching transistors between display and fingerprint functions, the design avoids duplicating entire driving circuit blocks, thereby reducing overall device complexity while enabling fingerprint recognition.
Solution Approach 2:
The circuit uses periodic timing sequences to alternate between display driving mode and fingerprint driving mode. During specific time intervals, the shared GOA circuit configures itself to drive fingerprint electrodes instead of display pixels, allowing one circuit structure to handle multiple functions through time-division multiplexing.
Data Source
AI summary
The present invention provides a driving circuit including multilevel cascading driving sub-circuits, wherein an Nth level driving sub-circuit includes a pull-up potential generating unit, a driving signal generating unit, a pull-down potential generating unit, and a driving signal pull-down unit. The driving circuit provided by the present invention separately outputs a display driving signal and fingerprint driving signals in a different timing through the driving signal generating unit, so that fingerprint driving circuits are not required, thereby reducing size of border regions occupied thereof.