In-Display Biosensor Signal Interference Reduction
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Solution Overview
Problem
In electronic devices, biometric sensors face interference with display signals, making it difficult to maintain high recognition accuracy and secure sufficient processing time, especially when integrated into the screen area.
Innovation Solution
The integration of a processor that extends the blank period of display signals to allow for biometric data processing, reducing interference and enhancing recognition accuracy by using the biometric sensor during this extended period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the biometric sensor is disposed inside the screen area to increase screen area, then the screen area is increased, but mutual interference occurs between display signals and biometric sensor signals
Solution Approach 1:
The patent implements periodic action by extending the blank period of display signals to create dedicated time windows for biometric sensor operation. The display operates in cycles with extended blank periods where no display data is transmitted, allowing the biometric sensor to function without interference. This periodic timing arrangement separates the operational cycles of the display and biometric sensor, eliminating signal interference while maintaining both functions within the integrated screen area.
2Area of stationary object
If the biometric sensor is disposed inside the screen area, then the screen area is increased, but sufficient processing time for biometric data cannot be secured
Solution Approach 1:
The patent uses periodic action by creating regular intervals (blank periods) in the display signal transmission cycle. These extended blank periods serve as dedicated time slots for biometric data acquisition and processing. The processor utilizes these periodic time windows to collect and process biometric sensor data without competing with display operations, thereby securing sufficient processing time while maintaining the integrated screen design.
Solution Approach 2:
The patent applies preliminary action by extending the blank period in advance before biometric data processing is required. The display driver controller proactively creates these extended idle periods in the display signal timeline, ensuring that sufficient time is already allocated and ready for biometric sensor operation and data processing. This preliminary time allocation prevents time conflicts between display refresh and biometric processing operations.
3Loss of time
If the blank period of display signal is extended, then processing time for biometric data is increased, but display refresh rate may be affected
Solution Approach 1:
The patent implements dynamics by making the blank period extension configurable and adaptive. The system can dynamically adjust the duration of extended blank periods based on processing requirements, and can flexibly select which specific display signals (vertical sync, horizontal sync, or data enable signals) to extend. This dynamic approach allows optimization of both biometric processing time and display refresh performance according to different operational conditions.
Data Source
AI summary
The present invention relates to a method by which an electronic device including a biosensor obtains biometric information in a section in which image data is not transmitted to a display. An electronic device according to various embodiments of the present invention comprises: a display; a biosensor formed in at least a portion of the display; and a processor functionally connected with the display, and the biosensor, wherein the processor can extend a blank section of a reference signal, which is any one of a plurality of signals for driving the display in a state of sensing the biometric information of a user, and can drive the biosensor in the extended blank section of the reference signal so as to sense the biometric information of the user. The present invention can also include additional various embodiments.