Handheld Device Front-Cover Integration for Optical Touch Sensing
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Solution Overview
Problem
Integrating sophisticated components into a compact and reliable handheld electronic device poses challenges, particularly in ensuring durability and efficient functionality while maintaining a user-friendly design.
Innovation Solution
The device incorporates a housing with a front cover and display, featuring optical sensors, touch-sensitive regions, and a light emitter, along with a polymer coating and opaque masks, to enhance interaction and functionality while maintaining a compact form.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple sophisticated components (optical sensors, touch-sensitive regions, light emitter) are integrated into the front cover area, then device functionality and user interaction capabilities are enhanced, but device complexity increases
Solution Approach 1:
The patent combines multiple functional components (optical sensors, touch-sensitive regions, light emitter) into a single integrated front cover assembly. The front cover serves as both a protective element and a functional interface, merging structural and interactive functions into one component to enhance versatility while managing complexity through integration.
Solution Approach 2:
The front cover is designed to perform multiple functions simultaneously: it provides structural protection, enables touch input detection, facilitates optical sensing, and supports light emission. This multi-functionality approach allows a single component to fulfill various roles, improving device adaptability without proportionally increasing overall complexity.
2Ease of operation
If the front cover includes multiple holes and sensor regions, then user interaction capabilities are enhanced, but manufacturing precision requirements increase
Solution Approach 1:
The front cover is segmented into distinct functional zones including multiple holes for optical sensors, touch-sensitive regions, and light emitter areas. Each zone is designed and positioned independently to optimize its specific function, allowing for modular manufacturing and assembly while maintaining high precision where needed.
Solution Approach 2:
Different regions of the front cover are designed with locally optimized properties: specific areas have enhanced touch sensitivity, other areas have precise optical clearances for sensors, and certain zones incorporate light-emitting capabilities. This local quality approach ensures each region meets its specific functional requirements without requiring the entire cover to be manufactured at maximum precision levels.
3Reliability
If optical sensors and light emitter are positioned below the front cover, then device durability is improved, but light emission efficiency may be affected
Solution Approach 1:
The front cover acts as an intermediary element between the light emitter (positioned below the cover for durability) and the external environment. The cover material and structure are designed to efficiently transmit light from the hidden emitter to the outside, minimizing energy loss while maintaining the protective positioning of the light-emitting component.
Solution Approach 2:
The front cover incorporates optical properties that enhance light transmission efficiency. The material composition and surface characteristics are optimized to allow specific wavelengths of light to pass through with minimal attenuation, compensating for the distance and potential obstruction caused by positioning the light emitter below the cover surface.
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 solution enables advanced user interactions, including gesture recognition and efficient light-based sensing, while ensuring durability and reliability in a compact form factor.
Implementation Method 1
a light emitter positioned below the front cover and below the first hole and configured to emit light onto an object, and the first optical sensor may be configured to receive a portion of the emitted light reflected from the object
Implementation Method 2
a touch-sensing component configured to detect a first touch input applied to the front cover in the active display region of the display and a second touch input applied to the front cover over the first hole in the display
Data Source
AI summary
A portable electronic device may include an enclosure including a front cover defining a front exterior surface, and a display positioned below the front cover and including a set of transparent conductive traces positioned in a graphically active region of the display and including a first plurality of transparent conductive traces and a second plurality of transparent conductive traces oriented perpendicular to the first plurality of transparent conductive traces. The portable electronic device may further include a proximity sensor including an optical emitter below the display and configured to emit light through the display and through the front cover. The optical emitter may be arranged relative to an optical receiver along a direction oblique to the first plurality of transparent conductive traces and to the second plurality of transparent conductive traces.