Under-Display Sensor Layout Using Mixed-Transmissivity Display Regions
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Solution Overview
Problem
Conventional displays limit the transparency required for optical sensors due to the need for light to pass through the display, resulting in a trade-off between display quality and transparency.
Innovation Solution
An electronic device with a display featuring a first region using a more transparent display technology, such as micro LED, and a second region using a less transparent technology, like OLED, where the sensor is positioned behind the more transparent region to maximize light transmission while maintaining display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional display technology is used to occupy the complete front side of the device, then display quality (brightness and resolution) is improved, but display transparency deteriorates, causing impairment to optical sensors
Solution Approach 1:
The display device is divided into multiple display regions with different transparency characteristics. A first display region uses a first display technology with first transmissivity, while a second display region uses a second display technology with second transmissivity. This segmentation allows different parts of the display to serve different functions: one region optimizes for display quality while another region optimizes for sensor transparency.
Solution Approach 2:
Different display technologies are applied to different regions of the display device based on local requirements. The first display region uses a display technology optimized for brightness and resolution, while the second display region uses a display technology optimized for transparency. This local quality approach ensures that each region has the properties needed for its specific function.
2Reliability
If display transparency is increased to improve sensor performance, then sensor impairment is reduced, but display quality (brightness and resolution) deteriorates
Solution Approach 1:
The display is segmented into regions with different transparency levels. The second display region is specifically designed with higher transmissivity to allow electromagnetic radiation to pass through to the sensor, while the first display region maintains higher brightness and resolution for general display purposes.
Solution Approach 2:
The second display region uses a display technology specifically selected for its transparency properties, allowing it to serve the sensor function. This local optimization for transparency in the second region does not compromise the overall display quality because the first region maintains high brightness and resolution.
3Device complexity
If a single display technology is used across the entire display, then device complexity is reduced, but the ability to simultaneously optimize display quality and sensor transparency deteriorates
Solution Approach 1:
The display device is segmented into multiple regions using different display technologies. This segmentation increases the device's ability to perform multiple functions simultaneously (high-quality display and sensor transparency) at the cost of increased structural complexity. The first display region and second display region are integrated into a single cohesive display device.
Solution Approach 2:
The display device achieves multi-functionality by incorporating different display technologies in different regions. The first display region provides high-quality visual display, while the second display region provides transparency for sensor operation. This universal design allows the single display device to fulfill multiple functions that would otherwise require separate components.
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 configuration allows for improved light guidance and reduced impairment of sensors, enabling higher transparency and potentially reduced power consumption and heat generation, thus addressing the limitations of conventional under-display sensor setups.
Implementation Method 1
a first display region using a first display technology and exhibiting a first transmissivity for the electromagnetic radiation
Implementation Method 2
at least one sensor configured to measure electromagnetic radiation received from a scene in front of the front side of the display device
Data Source
AI summary
An electronic device is provided. The electronic device includes a display device configured to display an optical image on a front side of the display device. Further, the electronic device includes at least one sensor configured to measure electromagnetic radiation received from a scene in front of the front side of the display device. The display device includes a first display region using a first display technology and exhibiting a first transmissivity for the electromagnetic radiation. The display device further includes a second display region using a second display technology and exhibiting a second transmissivity for the electromagnetic radiation. The first transmissivity is higher than the second transmissivity. The at least one sensor is arranged on a back side of the display device and faces the first display region.