Active Region Biometric Detection in Display Pixels
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional display devices face challenges in integrating biometric detection functions without affecting original image display, as biometric recognition ICs typically need to be placed in non-active regions, requiring complex design considerations.
Innovation Solution
Embedding a biometric detection function in the active region of a display device by using an active matrix substrate with display and photo sensing pixels that emit light during blank periods to detect biometric patterns, such as fingerprints, without displacing components from the non-active region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fingerprint recognition IC is arranged in a non-active region, then biometric detection function is achieved, but device layout complexity increases and design flexibility is reduced
Solution Approach 1:
The patent merges the biometric detection function with the existing active region pixels by integrating photo sensing capabilities into display pixels. This eliminates the need for separate biometric detection hardware in non-active regions, thereby reducing layout complexity while maintaining adaptability.
Solution Approach 2:
The display pixels are designed to serve dual purposes: displaying images during active periods and sensing biometric data during blank periods. This multi-functionality approach allows the same hardware to perform both display and biometric detection, simplifying the overall device architecture.
2Ease of operation
If biometric detection is embedded in the active region, then design flexibility and convenience are improved, but image display quality may be affected
Solution Approach 1:
The system uses periodic action by activating photo sensing only during blank periods when the display is not showing images. This temporal separation ensures that image display quality is maintained during active periods while biometric detection occurs during inactive periods, eliminating interference between the two functions.
Solution Approach 2:
The patent implements preliminary action by pre-designing pixels with dual display and photo sensing capabilities from the outset. This allows the system to seamlessly switch between display and biometric detection modes without requiring additional hardware or complex real-time modifications, thereby maintaining both image quality and detection convenience.
3Adaptability or versatility
If separate biometric detection hardware is added, then detection function is achieved, but device structure becomes more complex
Solution Approach 1:
The patent combines biometric detection capabilities with existing display pixels by integrating photo sensing elements into the pixel structure. This merging approach eliminates the need for separate biometric detection hardware, thereby maintaining detection capability while simplifying the overall device structure.
Solution Approach 2:
The display pixels serve themselves by performing both display and biometric detection functions. The photo sensing capability is embedded within the pixel structure, allowing pixels to autonomously perform biometric sensing during blank periods without requiring external detection hardware, thus reducing structural complexity.
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
Enables convenient and flexible biometric detection without impacting image display, allowing for seamless integration of biometric functionality within the display device without additional hardware in non-active areas.
Implementation Method 1
The photo sensing region is adjacent to the display region, and is configured to detect the light emitted by the display region and reflected from a biometric object and to convert the reflected light into photo detection signals
Data Source
AI summary
A display device includes an active matrix substrate and a detection circuit. The active matrix substrate has pixels that are configured to display an image. The pixels include display and photo sensing pixels each including a display region and a photo sensing region. The display region is configured to emit light with a predetermined emitting frequency in a blank period of the display device. The photo sensing region is adjacent to the display region, and is configured to detect the light emitted by the display region and reflected from a biometric object and to convert the reflected light into photo detection signals. The detection circuit is coupled to the photo sensing circuit of each of the display and photo sensing pixels, and is configured to construct a biometric pattern corresponding to the biometric object based on the photo detection signals.