Optical Sensor Assembly Light Guide Plate Rear Placement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The integration of illuminance sensors in electronic devices with large display screens is challenging due to the difficulty in arranging proximity illuminance sensors on the front, as existing designs are hindered by the need to accommodate cameras and protect the devices, while ultrasonic proximity sensors can be used but not illuminance sensing functions effectively.
Innovation Solution
An optical sensor assembly utilizing a light guide plate composed of plastic optical fibers, arranged in a horizontal and vertical configuration, allowing light to be transmitted from the front surface to a sensor connector inside the device, enabling the detection of ambient light and proximity without being affected by internal light sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If proximity illuminance sensors are arranged on the front of the electronic device, then ambient light sensing function is achieved, but the display area is reduced due to the need to accommodate cameras and protect the device
Solution Approach 1:
A light guide plate is introduced as an intermediary component to transmit light from the front surface to the sensor connector positioned at the rear of the display. This mediator allows the sensor to be located away from the front area, thus preserving display space while maintaining sensing capability
Solution Approach 2:
The sensor arrangement is moved from the traditional two-dimensional front surface to a three-dimensional configuration where the sensor connector is positioned at the rear of the display, utilizing the depth dimension to resolve the space conflict
2Area of stationary object
If ultrasonic proximity sensors are used instead of optical sensors, then the front can be fully covered with display, but illuminance sensing function cannot be integrated
Solution Approach 1:
The optical sensor assembly is designed to perform multiple functions including both proximity detection and illuminance sensing through a single integrated structure, allowing full display coverage while maintaining both sensing capabilities
3Area of stationary object
If illuminance sensors are arranged in zones other than the front, then display area is maximized, but ambient light cannot be sensed due to protective cases
Solution Approach 1:
The light guide plate acts as a mediator that transmits light from the front surface through the display to the sensor connector at the rear, enabling ambient light sensing without requiring direct sensor exposure on the front surface where protective cases would block it
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 solution allows for enhanced design flexibility by enabling the detection of ambient light and proximity without exposing the sensor to internal light sources, thus allowing full-front display designs while maintaining sensor functionality.
Implementation Method 1
a light guide plate having a first surface on which light is incident and a second surface from which light is emitted, and a sensor connector that optically connects to the second surface of the light guide plate
Data Source
AI summary
The present disclosure relates to an optical sensor assembly. According to one aspect of the present disclosure, an embodiment of the optical sensor assembly is provided. The optical sensor assembly includes a plurality of optical fibers, wherein one ends of the plurality of optical fibers are configured in a row, and the other ends of the plurality of optical fibers are stacked in at least two rows, such that a width of a first surface formed by the one ends of the plurality of optical fibers is greater than a width of a second surface formed by the other ends of the plurality of optical fibers, and the optical sensor assembly further includes a sensor connector optically coupled with the second surface. And the sensor connector can be separated from the first surface and configured inside the electronic device.