Iris Camera Infrared Lamp Polarizing Member Light Distribution
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Solution Overview
Problem
Current iris lock systems face inefficiencies in iris identification due to the angle and distribution of infrared light, leading to reduced energy per unit area and lower success rates in unlocking electronic devices.
Innovation Solution
Incorporating a polarizing member between the infrared lamp and the cover plate to reduce the angle of infrared light emission, increasing the energy per unit area and improving iris camera identification efficiency, thereby enhancing the reliability of unlocking the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the infrared lamp emits light in a wide angle distribution, then the coverage area is increased, but the energy per unit area is reduced leading to lower identification efficiency
Solution Approach 1:
The patent applies local quality by making the infrared lamp emit light with different distribution characteristics in different directions. Specifically, the lamp is designed to emit light with a first distribution in a first direction and a second distribution in a second direction, allowing concentrated energy delivery to the specific region where the iris camera is located while maintaining broader coverage in other directions.
2Illumination intensity
If the infrared lamp uses high power to increase energy per unit area, then identification efficiency is improved, but manufacturing cost increases
Solution Approach 1:
The patent changes the light distribution parameters of the infrared lamp rather than simply increasing power. By adjusting the emission distribution characteristics (first distribution and second distribution) of the lamp, the system achieves concentrated energy delivery to the iris camera region, improving identification efficiency without requiring high power lamps that would increase manufacturing cost.
3Device complexity
If the infrared lamp is positioned far from the iris camera, then device structure is simplified, but the angle of light emission increases reducing energy concentration
Solution Approach 1:
The patent applies local quality by configuring the infrared lamp to emit light with different distributions in different directions. This allows the lamp to be positioned at a distance from the iris camera while still delivering concentrated energy to the camera's location through the specially designed light distribution pattern, maintaining both structural simplicity and energy concentration.
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
The polarizing member increases the energy of infrared light per unit area, improving iris camera identification efficiency and the success rate of unlocking the electronic device, while maintaining a short manufacturing cycle and low manufacturing cost for the infrared lamp.
Implementation Method 1
a polarizing member (5) arranged between the infrared lamp (4) and the cover plate (1) to reduce an angle of infrared light emitted from the infrared lamp (4)
Data Source
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AI summary
Provided is an electronic device (100), comprising: a cover plate (1); a main board (2) that is located on a rear side of the cover plate (1) and is spaced apart from the cover plate (1); an iris camera (3) that is connected to the main board (2) and located on a side of the main board (2) facing the cover plate (1); an infrared lamp (4) that is connected to the main board (2) and is located on the side of the main board (2) facing the cover plate (1), the infrared lamp (4) being spaced apart from the iris camera (3); and a polarizing member (5) that is located between the infrared lamp (4) and the cover plate (1) to reduce the angle at which the infrared lamp (4) emits light.