Light Sensor Placement Below Display Panel for Proximity Sensing
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Solution Overview
Problem
The challenge is to integrate light emitting and receiving units into electronic devices with expanding display screens without compromising space, as the reduction in side space due to larger displays makes it difficult to accommodate these components effectively.
Innovation Solution
The solution involves positioning a light emitting module adjacent to the display panel and a light receiving module either on or below the display panel, allowing for efficient light detection and emission while minimizing the impact on the device's size, with the light emitting unit emitting light that is discharged through a region with higher light transmission, and the receiving unit positioned to capture reflected light without interfering with the display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the display size is extended to meet the trend toward large-size screens, then the display area is increased, but the side space is reduced making it difficult to install light sensors
Solution Approach 1:
The light receiving module is positioned below the display panel rather than in the side space, utilizing the vertical dimension (z-axis) to accommodate the light sensor. This allows the display to be extended horizontally while maintaining adequate space for light sensing functionality through a different spatial arrangement.
2Reliability
If the light emitting module is disposed adjacent to the display panel, then the light detection function is maintained, but the display performance may be degraded due to light interference
Solution Approach 1:
The light receiving module is extracted from the side space and positioned below the display panel. This separation removes the potential source of light interference from the display area while maintaining the light detection function through the redirected optical path below the display.
3Measurement precision
If the light receiving module is positioned to capture reflected light, then proximity sensing accuracy is improved, but the device complexity increases
Solution Approach 1:
The light receiving module is integrated into the display assembly structure, combining the light sensing function with the existing display components. This merging approach achieves accurate proximity sensing while avoiding significant increases in overall device complexity by utilizing the existing structural framework.
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 enables the detection of light for functions like proximity sensing without degrading the display's performance and allows for the extension of display size while maintaining the device's compactness, enhancing the influence between the display and light detection functionality.
Implementation Method 1
a first light emitting module disposed adjacent to the display panel, and configured to output light
Implementation Method 2
a light receiving module disposed in a portion of the display panel or below or beneath the display panel, and configured to detect light of the outputted light that is reflected by an external object
Implementation Method 3
light emitting units having different attributes are mounted in a side space
Data Source
AI summary
An electronic device is provided. The electronic device includes a display panel, a light emitting module disposed adjacent to the display panel, and configured to output light, and a light receiving module disposed in a portion of the display panel or below or beneath the display panel, and configured to detect light of the outputted light that is reflected by an external object.