Concentric Cover Optical Coatings for Sensor Light Separation
Solution Overview
Problem
Existing electronic devices with optical sensors face challenges in effectively managing light transmission and reception, particularly in configurations where light-emitting and light-receiving portions are spaced apart, leading to inefficiencies and potential interference.
Innovation Solution
The electronic device incorporates a cover with a transparent portion featuring concentric optical coatings and a light-blocking material to manage light transmission and reception, including a first optical coating with concentric patterns and a second optical coating spaced apart, along with a light-blocking member to minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If light-emitting and light-receiving portions are spaced apart, then the device can accommodate larger optical components and improve heat dissipation, but light transmission efficiency decreases and unwanted light interference increases
Solution Approach 1:
A light-blocking member is introduced as an intermediary component between the light-emitting portion and the light-receiving portion. This member selectively blocks unwanted light paths while allowing desired light transmission, thereby reducing interference without requiring the components to be closer together
Solution Approach 2:
The cover is designed with spatially varying optical properties: a first optical coating with concentric patterns is applied to regions facing the light-emitting portion to control light distribution, while a second optical coating is applied to regions facing the light-receiving portion to optimize light reception. This local differentiation of optical properties enables precise control over light paths
2Productivity
If optical coatings are applied to manage light transmission, then light management efficiency improves, but manufacturing complexity increases
Solution Approach 1:
The optical coating system is segmented into distinct functional zones: a first optical coating with concentric patterns for light emission control and a second optical coating for light reception optimization. Each coating is applied to specific regions of the cover, allowing independent optimization of each function while maintaining overall system performance
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 enhances light management, improving the efficiency and accuracy of optical sensing by reducing unwanted light transmission and enhancing the functionality of optical modules.
Implementation Method 1
a first optical coating disposed on a surface of the transparent portion facing the light-emitting portion... The first optical coating includes concentric patterns with respect to a location overlapping the light-emitting portion
Implementation Method 2
a second optical coating, spaced apart from the first optical coating, disposed on a surface of the transparent portion facing the at least one light-receiving portion
Implementation Method 3
a light-blocking member disposed between the first optical coating and the second optical coating
Data Source
AI summary
An electronic device is provided. The electronic device includes a cover including a transparent portion, an optical sensor that is spaced from the cover and includes a light-emitting portion configured to transmit first light portions to the outside through the transparent portion of the cover and at least one light-receiving portion spaced from the light-emitting portion, configured to receive second light portions through the transparent portion, and surrounding the outside of the light-emitting portion, a first optical coating disposed on one surface of the transparent portion and facing the light-emission portion, and a second optical coating spaced from the first optical coating, disposed on one surface of the transparent portion, and facing the at least one light-receiving portion. The first optical coating includes patterns that are concentric around a location overlapping the light-emitting portion.