Touch Display Panel with Embedded Fingerprint Recognition
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Solution Overview
Problem
Current touch display panels face challenges in integrating fingerprint recognition on the front surface, leading to a low screen-to-body ratio and poor user experience due to the awkward placement of fingerprint recognition keys, which affects the screen's design and manufacturing cost.
Innovation Solution
A touch display panel design featuring a common electrode layer with touch electrodes arranged in an array, scanning lines, detection lines, and thin film transistors, along with a driving method that switches on the transistors row by row to enable fingerprint recognition and touch functionality, allowing for high integration and precise fingerprint pattern detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fingerprint recognition key is designed on the front surface, then fingerprint recognition function is achieved, but the screen-to-body ratio is reduced
Solution Approach 1:
The patent merges the fingerprint recognition function with the display panel by integrating touch electrodes, scanning lines, detection lines, and thin film transistors directly into the display structure. This combination eliminates the need for a separate fingerprint recognition key, allowing the fingerprint recognition functionality to be embedded within the display area itself, thus maintaining a high screen-to-body ratio while achieving fingerprint recognition.
Solution Approach 2:
The display panel is designed to perform multiple functions: display, touch detection, and fingerprint recognition. By making the display panel universal and capable of handling all three functions through integrated components, the patent eliminates the need for dedicated separate components, thereby maximizing the screen-to-body ratio while providing comprehensive functionality.
2Area of stationary object
If fingerprint recognition is designed on the back surface, then screen-to-body ratio is maintained, but user convenience is reduced
Solution Approach 1:
The patent combines fingerprint recognition functionality with the front surface display panel, allowing users to place their fingers directly on the display surface for authentication. This integration maintains the high screen-to-body ratio while improving user convenience by enabling front surface fingerprint recognition, which aligns with user habits and provides a more natural interaction experience.
3Adaptability or versatility
If separate fingerprint recognition components are added, then fingerprint recognition function is achieved, but device complexity increases
Solution Approach 1:
The patent merges fingerprint recognition components (touch electrodes, scanning lines, detection lines, thin film transistors) with the existing display panel structure. By integrating these components into the same layered architecture and using shared manufacturing processes, the patent reduces device complexity compared to adding separate fingerprint recognition modules, while still achieving full fingerprint recognition functionality.
Data Source
AI summary
The present disclosure provides a touch display panel, a driving method thereof and a display device. The touch display panel includes a plurality of touch electrodes distributed in an array and multiplexed as common electrodes, a plurality of scanning lines extending in the row direction of the touch electrodes, a plurality of detection lines extending in the column direction of the touch electrodes, and first control circuits which are in one-to-one correspondence to the touch electrodes. The touch electrodes, the scanning lines, the detection lines and the first control circuits are arranged on a base substrate, each row of the touch electrodes is coupled with one scanning line through the corresponding first control circuit, each column of the touch electrodes is coupled with one detection line through the corresponding first control circuit, and the detection lines and the scanning lines are insulated from each other.