Proximity Sensor Integration in Display Apparatus
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Solution Overview
Problem
Existing display apparatuses with proximity sensors face challenges in maintaining accurate sensing distances due to impacts, which complicate assembly and increase costs by requiring extended flexible printed circuits (FPCs) to maintain pressure contact between the proximity sensor and protective window.
Innovation Solution
A display apparatus design where the proximity sensor is integrated with a protective member, and a fixing portion is formed in the exterior member to secure the display unit, minimizing FPC length and maintaining a constant sensing distance, while a cap with elastomer and thermoplastic resin provides impact protection and secure fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the proximity sensor is held with the exterior unit through pressure contact, then the sensing distance stability is improved, but the assembly complexity increases and cost increases due to FPC extension
Solution Approach 1:
The proximity sensor is integrated directly into the display unit, merging two previously separate components (proximity sensor and display unit). This eliminates the need for separate FPC connections between the exterior unit and proximity sensor, simplifying assembly while maintaining sensing stability through the fixed integration structure.
Solution Approach 2:
The proximity sensor is extracted from the exterior unit and relocated to the display unit. This extraction removes the need for complex FPC routing through the exterior unit, reducing assembly complexity while the sensor remains positioned near the protective window for stable sensing.
2Reliability
If the proximity sensor is held with the exterior unit through pressure contact, then the sensing distance stability is improved, but the manufacturing cost increases due to FPC extension
Solution Approach 1:
The proximity sensor is merged with the display unit, eliminating the need for separate FPC materials and connection processes. This reduces manufacturing cost by removing unnecessary materials while the sensor integration maintains stable positioning for reliable sensing.
Solution Approach 2:
The invention uses a simpler, more cost-effective integration approach where the proximity sensor is directly mounted on the display unit rather than requiring expensive extended FPC connections. This reduces material costs and manufacturing complexity while achieving the same functional goal.
3Measurement precision
If the distance between the proximity sensor and protective window changes due to impact, then the sensing accuracy deteriorates, but preventing this requires complex assembly structures
Solution Approach 1:
The proximity sensor and display unit are merged into a single integrated component, which is then fixed to the exterior unit. This integration ensures that the sensor maintains a constant relative position to the protective window, preserving sensing accuracy without requiring complex additional positioning structures.
Solution Approach 2:
The proximity sensor is pre-integrated with the display unit during manufacturing, establishing a fixed spatial relationship before final assembly. This preliminary integration ensures that when the display unit is assembled to the exterior unit, the sensor is automatically positioned at the correct distance from the protective window, maintaining sensing accuracy.
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 design simplifies assembly, reduces costs, and enhances reliability by maintaining a stable sensing distance and preventing FPC extension, ensuring efficient display switching and impact protection.
Implementation Method 1
The light emitting element transmits light, which in turn is reflected on a reflective object such as a user, and the light receiving element receives the reflected light to detect the approach of the reflective object
Implementation Method 2
a cap with elastomer and thermoplastic resin provides impact protection and secure fixation
Data Source
AI summary
A display apparatus which is assembled in a favorable manner and increases reliability at low cost by keeping the length of a flexible printed circuit (FPC) to a minimum. The display apparatus has a display member, on which at least an image is displayed, and an exterior member which covers the display member. The display member has a proximity sensor that detects the approach of an object to be detected. The exterior member has a protective member that protects the proximity sensor. A fixing member that fixes the display member to the exterior member in a sensing direction of the proximity sensor is formed in the exterior member.