Transparent Display Flicker Mitigation via Camera-Based Infrared Control
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Solution Overview
Problem
In mobile phones with full-screen designs, the infrared sensor positioned below the display screen causes flickering due to emitted infrared light interacting with the display screen components, leading to poor user experience.
Innovation Solution
A control method that acquires and processes multi-frame environmental images to detect changes in feature points, turning off the transparent display screen and activating the infrared sensor when the user approaches, thereby avoiding the flicker caused by the infrared sensor's operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the infrared sensor is disposed below the display screen to increase screen-to-body ratio, then the screen-to-body ratio is improved, but the display screen causes flickering due to infrared light interaction with display components
Solution Approach 1:
The system performs preliminary detection using the camera to identify when the device is in a calling state (handheld position). Based on this preliminary detection, the control unit proactively turns off the display screen before the infrared sensor operates, preventing the harmful flickering effect from occurring in the first place
Solution Approach 2:
The infrared sensor operates in periodic intervals rather than continuously - it is activated only during detected calling states. The system periodically switches between camera-based detection mode and infrared sensor mode, eliminating continuous infrared emission that causes flickering
2Measurement precision
If the infrared sensor operates continuously to detect distance, then the distance detection function is improved, but the flicker effect on the display screen worsens
Solution Approach 1:
The system dynamically switches between different detection modes based on real-time conditions. The camera continuously monitors environmental images to detect calling states, and only when such states are detected does the system activate the infrared sensor. This dynamic adaptation ensures distance detection occurs only when necessary, minimizing flickering
Solution Approach 2:
The system extracts the distance detection function from continuous operation and separates it into conditional operation. By using the camera as a preliminary detector, the system extracts only the necessary moments for infrared sensor activation, thereby separating the harmful continuous infrared emission from the useful distance detection function
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 method effectively mitigates the flicker issue by turning off the display screen and activating the infrared sensor only when necessary, improving user experience by preventing interference from the infrared sensor's operation on the display screen.
Implementation Method 1
an infrared sensor which is disposed below the display area, and configured to emit infrared light and receive infrared light reflected by an object to detect a distance of the object to the electronic device
Data Source
AI summary
The disclosure discloses a control method for an electronic device. The electronic device comprises a transparent display screen comprising a display area and an infrared sensor which is disposed below the display area. The control method comprises: acquiring continuous multi-frame environmental images when the electronic device is in a state of incoming call; processing the continuous multi-frame environmental images to collect a plurality of feature points in the environmental images; determining whether the plurality of feature points in the continuous multi-frame environmental images have changed; controlling the transparent display screen to be off when the plurality of feature points have changed; and controlling the infrared sensor to be on to detect a distance of an object to the electronic device. The disclosure also discloses a control device and electronic device.