Under-Display Sensor Positioning via Sequential Pixel Illumination
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Solution Overview
Problem
Ambient light sensors in electronic devices face performance issues due to assembly tolerance errors, leading to inaccurate detection of ambient light signals, especially when the sensor is assembled at a position different from its pre-assembly position, affecting the brightness and color correction of display screens.
Innovation Solution
A method and apparatus for locating the sensor under a display screen by acquiring an assembly tolerance region, lighting up pixels sequentially, and determining the sensor's position based on sensing data, which improves the accuracy of sensor placement and performance by using white pixels and multiple rows of pixels to enhance light signal intensity and reduce error.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the sensor is assembled within the assembly tolerance region, then the sensor can be installed with acceptable manufacturing precision, but the detection accuracy of ambient light signals deteriorates due to position deviation from the pre-assembly position
Solution Approach 1:
The patent applies preliminary action by performing sensor location determination before using the sensor for ambient light detection. The system lights up pixels at different positions sequentially, acquires sensing data, and determines the actual sensor position in advance. This pre-positioning information is then used to correct detection parameters, ensuring accurate ambient light signal detection even when the sensor is assembled at a position different from the pre-assembly position.
2Measurement precision
If pixels at different positions are lit up sequentially to determine sensor position, then the positioning accuracy improves, but the time consumption increases
Solution Approach 1:
The patent applies segmentation by dividing the assembly tolerance region into multiple pixel positions that are lit up sequentially. Instead of illuminating the entire region simultaneously, the system lights up pixels at different positions one by one, acquires sensing data for each position, and determines the actual sensor position based on the sensing data. This segmented approach reduces the overall time consumption compared to illuminating all pixels simultaneously while maintaining positioning accuracy.
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 approach effectively improves the accuracy of sensor positioning, leading to enhanced performance of ambient light sensors by ensuring accurate detection of ambient light signals and reducing the impact of assembly tolerance errors, thereby improving the overall performance of electronic devices.
Implementation Method 1
acquiring multiple pieces of sensing data of the sensor when the pixels at different positions are lit up sequentially, the multiple pieces of sensing data being data obtained after the sensor sequentially receives light signals emitted by the pixels at different positions
Data Source
AI summary
Embodiments of the present application provide a method and apparatus for locating a sensor under a display screen and an electronic device, which can effectively improve performance of the sensor, thereby improving performance of the electronic device. The method includes: acquiring an assembly tolerance region in the display screen, where the assembly tolerance region corresponds to an assembly tolerance of the sensor; lighting up pixels at different positions within the assembly tolerance region sequentially; acquiring multiple pieces of sensing data of the sensor when the pixels at different positions are lit up sequentially, the multiple pieces of sensing data being data obtained after the sensor sequentially receives light signals emitted by the pixels at different positions; and determining a position of the sensor according to the multiple pieces of sensing data.