Infrared Sensor Light Guiding Element for Full-Screen Display
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Solution Overview
Problem
In full-screen mobile phones, the narrow bezel between the housing and display screen assembly lacks sufficient space for infrared sensors, compromising the strength and reliability of the electronic device due to the need for holes for emitting and receiving infrared light signals.
Innovation Solution
An electronic device design featuring an infrared sensor located below the display screen with a light blocking element between the emitter and the display area, allowing infrared light to penetrate and be received without entering the display area, ensuring the sensor's functionality and the screen's stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If infrared sensors are installed in the bezel area to enable proximity detection, then the sensor functionality is achieved, but the screen-to-body ratio decreases and the structural strength is compromised due to holes in the bezel
Solution Approach 1:
The infrared sensor is relocated from the traditional bezel area (2D plane) to the back panel area (different spatial dimension), allowing the sensor to function without compromising the front display area or bezel structural integrity. The light guiding element extends the sensor's detection capability through the display assembly from the back side.
Solution Approach 2:
A light guiding element is introduced as an intermediary component between the infrared sensor and the display area. This element guides infrared light through the display assembly, enabling the sensor to detect proximity through the screen without requiring holes in the bezel or compromising structural strength.
2Adaptability or versatility
If holes are created in the bezel for infrared light transmission, then the sensor can detect proximity signals, but the structural strength and reliability of the electronic device decrease
Solution Approach 1:
The sensor assembly is positioned on the back panel (different dimension from the front bezel), eliminating the need for holes in the front bezel structure. The light guiding element creates an optical path through the display assembly that does not require physical openings in the load-bearing bezel.
Solution Approach 2:
The light guiding element serves as a mediator that transmits infrared light through the display assembly without requiring holes in the bezel. This intermediary component preserves the structural integrity of the bezel while enabling proximity detection functionality.
3Volume of moving object
If the infrared sensor is positioned close to the display area for compact design, then space is saved, but infrared light may interfere with the display quality
Solution Approach 1:
The light guiding element acts as a mediator that directs infrared light specifically toward the sensor while preventing it from reaching the display area. This intermediary structure enables compact positioning of the sensor near the display without causing light interference, as the light path is controlled and contained within the guiding element.
Solution Approach 2:
The light guiding element creates a localized optical path that confines infrared light to a specific trajectory toward the sensor. This localized light guidance prevents infrared light from spreading into the display area, allowing the sensor to be positioned close to the display without causing interference.
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 maintains the full-screen effect while preventing infrared light from interfering with the display and enhancing the device's reliability and power management by accurately detecting user proximity and adjusting the screen's backlight.
Implementation Method 1
a light guiding element arranged adjacent to the second surface, the light guiding element being configured to transmit light, penetrating the non-display area from the first surface, to the light sensor
Implementation Method 2
An infrared sensor located below the display screen with a light blocking element between the emitter and the display area, allowing infrared light to penetrate and be received without entering the display area
Data Source
Figure 1
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AI summary
The present disclosure provides an electronic device and a manufacturing method thereof. The electronic device includes: a display screen, the display screen including a display area and a non-display area surrounding the display area; a light sensor arranged below the display area; and a light guiding element arranged below the display screen, the light guiding element being configured to transmit light penetrating the non-display area to the light sensor.