Array Substrate Integrating Photosensitive and Capacitive Units for Palm Print Identification
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Solution Overview
Problem
Current liquid crystal displays (LCDs) lack the functionality for palm print identification, often requiring external circuits, resulting in complex structures and increased costs.
Innovation Solution
An array substrate integrated with photosensitive identification units and capacitive detection units, allowing for the acquisition and transmission of touch position and object information, enabling palm print identification within the display device without external circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an external independent palm print identification circuit is used, then the function of palm print identification is achieved, but the structure becomes complex and cost increases
Solution Approach 1:
The patent merges the palm print identification function with the display panel by integrating photosensitive identification units and capacitive detection units directly into the array substrate. The photosensitive identification unit includes a photosensitive transistor and capacitor, while the capacitive detection unit includes detection electrodes and transistors, all formed on the same substrate as the display pixels. This combination eliminates the need for external independent circuits, achieving both display and biometric identification functions in a single integrated device.
Solution Approach 2:
The array substrate is designed to perform multiple functions: it serves as both the display interface and the palm print identification interface. The display units control image output while the photosensitive and capacitive detection units simultaneously or sequentially perform touch detection and palm print acquisition. This multi-functionality allows the same hardware platform to deliver both visual display and biometric security features without requiring separate dedicated circuits.
2Adaptability or versatility
If an external independent palm print identification circuit is used, then the function of palm print identification is achieved, but the cost increases
Solution Approach 1:
The patent merges the palm print identification function with the display panel by integrating photosensitive identification units and capacitive detection units directly into the array substrate. The photosensitive identification unit includes a photosensitive transistor and capacitor, while the capacitive detection unit includes detection electrodes and transistors, all formed on the same substrate as the display pixels. This combination eliminates the need for external independent circuits, achieving both display and biometric identification functions in a single integrated device.
Solution Approach 2:
The array substrate is designed to perform multiple functions: it serves as both the display interface and the palm print identification interface. The display units control image output while the photosensitive and capacitive detection units simultaneously or sequentially perform touch detection and palm print acquisition. This multi-functionality allows the same hardware platform to deliver both visual display and biometric security features without requiring separate dedicated circuits.
3Productivity
If traditional detection methods are used, then touch detection is achieved, but the time required for palm print identification is reduced through integrated detection
Solution Approach 1:
The photosensitive identification units continuously monitor touch positions and the capacitive detection units are pre-positioned across the display surface, ready to immediately detect palm print information when a touch occurs. The system performs preliminary detection of touch events and can quickly transition to detailed palm print acquisition without requiring external circuit activation or signal routing delays. This pre-positioned detection capability significantly reduces the time required for palm print identification compared to traditional external circuit methods.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The integration of photosensitive and capacitive detection units on the array substrate simplifies the display device structure and enables efficient palm print identification, reducing the time required for the process by acquiring position information and object details within the device.
Implementation Method 1
the first subpixel includes a photosensitive identification unit, the photosensitive identification unit is connected with a read signal line and is configured to acquire and store position information of a touch position
Implementation Method 2
the second subpixel includes a capacitive detection unit, the capacitive detection unit is connected with the read signal line and is configured to acquire information of a touch object
Data Source
AI summary
An array substrate and a driving method thereof, a display panel and a display device. The array substrate includes a plurality of areas. Each area at least includes a first subpixel and a second subpixel, and each subpixel includes a corresponding display unit; the first subpixel includes a photosensitive identification unit, the photosensitive identification unit is connected with a read signal line and is configured to acquire and store position information of a touch position and transmit the acquired position information to the read signal line; and the second subpixel includes a capacitive detection unit, the capacitive detection unit is connected with the read signal line and is configured to acquire information of a touch object and transmit the acquired information of the touch object to the read signal line. The display device has a function of touch object identification (e.g., palm print identification) and has a simple structure.