Display Panel Biometric Sensor Scan Line Integration
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Solution Overview
Problem
Current display devices lack an efficient method to detect biometric information, such as fingerprints, for secure user authentication in electronic devices, particularly in multimedia devices like smartphones and tablets, which requires a seamless integration of biometric sensing capabilities with display functionality.
Innovation Solution
A display device is designed with a combination of a light emitting display panel and biometric sensors, where pixels and sensors are connected to a scan driving circuit, utilizing a sensor driving circuit with transistors and light sensing elements to detect external light and output detection signals, allowing for biometric information sensing within the display area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If biometric sensors are integrated into the display panel, then biometric authentication capability is improved, but device complexity increases
Solution Approach 1:
The patent combines biometric sensors directly into the display panel structure, merging two previously separate functions (display and biometric sensing) into a single integrated component. This allows the display panel to simultaneously perform visual output and fingerprint authentication, reducing the need for separate hardware modules while enhancing functionality.
Solution Approach 2:
The display panel is designed to serve multiple functions: it acts as both a visual display device and a biometric sensor for authentication. The same panel structure accommodates both pixel elements for display and sensor elements for fingerprint detection, making the device more versatile without adding separate components.
2Measurement precision
If sensors are connected to different scan lines than pixels, then biometric sensing accuracy is improved, but manufacturing complexity increases
Solution Approach 1:
The patent divides the scan line connections into separate channels: pixels are connected to scan lines for display control, while sensors are connected to different scan lines for biometric sensing. This segmentation allows independent optimization of each function's signal processing pathway, improving sensing accuracy by preventing signal interference while maintaining manufacturability through systematic routing.
Solution Approach 2:
The patent introduces separate scan lines as intermediary pathways between the sensor array and the control circuitry. These dedicated scan lines act as mediators that carry sensor signals independently from pixel control signals, ensuring accurate biometric data transmission without cross-interference from display operations.
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
This solution enables secure biometric authentication by integrating biometric sensing directly into the display panel, enhancing user security and convenience without requiring additional hardware, while maintaining the display functionality.
Implementation Method 1
each of the plurality of sensors may include a light sensing element and a sensor driving circuit connected to the light sensing element and a corresponding scan line among the plurality of scan lines and outputting a detection signal corresponding to external light
Data Source
AI summary
A display device includes a display panel and a scan driving circuit. The display panel includes a plurality of pixels and a plurality of sensors. The scan driving circuit drives a plurality of scan lines. Pixels in a j-th row among the plurality of pixels are connected to a j-th scan line among the plurality of scan lines, in which j is a positive integer. Sensors, which correspond to the pixels in the j-th row, from among the plurality of sensors are connected to an a-th scan line among the plurality of scan lines, in which a is a positive integer different from j.