Wearable Display Air-Layer Layout for Waterproof Inspection Visibility
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Solution Overview
Problem
Existing waterproof inspection methods for display apparatuses, such as watches, suffer from reduced visibility due to light reflection at air layers overlapping with display regions, limiting design freedom and solar panel placement.
Innovation Solution
A display apparatus design with a light reflection prevention layer on the surfaces contacting an air layer, aligned to minimize light reflection and enhance visibility, allowing waterproof inspection in the display region without compromising design or solar panel positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an air layer is provided in the display apparatus for waterproof inspection, then waterproof properties can be tested, but light reflection at the boundary with the air layer worsens display visibility
Solution Approach 1:
A light reflection prevention layer is introduced as an intermediary between the air layer and the display member. This layer has a refractive index that is intermediate between air and the display member materials, reducing the refractive index difference at interfaces and thereby minimizing light reflection while preserving the air layer's waterproof inspection function
Solution Approach 2:
The refractive index parameter of the medium between the air layer and display member is changed by introducing a light reflection prevention layer with specific refractive index properties. This parameter change reduces the refractive index mismatch, decreasing light reflection and improving display visibility without compromising waterproof testing
2Illumination intensity
If the air layer is provided in the circumferential edge of the protecting member to avoid display region overlap, then display visibility is maintained, but fogging confirmation becomes less clear and reliable
Solution Approach 1:
The light reflection prevention layer acts as an intermediary that enables the air layer to be positioned in the display region without creating harmful reflections. This allows fogging to occur and be clearly observed in the center display region, improving detection accuracy while maintaining visibility through the layer's anti-reflection properties
3Reliability
If a window for confirmation is provided in the circumferential edge to observe fogging, then waterproof inspection can be performed, but design freedom is limited
Solution Approach 1:
The light reflection prevention layer serves multiple functions: it prevents light reflection to maintain display visibility, enables clear fogging observation for waterproof inspection, and does not constrain design freedom. This multi-functional element replaces the need for separate confirmation windows, allowing flexible solar panel and display design while ensuring waterproof testing capability
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
Ensures high visibility and effective waterproof inspection in the display region, maintaining clear and vivid display quality while ensuring adequate waterproofing.
Implementation Method 1
a light reflection prevention layer is provided on a surface of each of the solar panel and the display member which contacts the air layer
Implementation Method 2
a drastic change in temperature is applied to the air inside the case and the air is condensed. Then, it is observed to see whether fogging by condensation occurs in a protecting member
Data Source
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AI summary
A display apparatus includes the following. A protecting plate is formed of a material which transmits light. A light transmitting plate is positioned below the protecting plate and is positioned in contact with the protecting plate. A display is provided below the light transmitting plate and includes a display region which can be viewed from outside. An air layer is positioned between the light transmitting plate and the display. A light reflection prevention layer is provided on at least one of a surface of the light transmitting plate facing the air layer and a surface of the display facing the air layer. The protecting plate, the light transmitting plate, the display, the air layer, and the light reflection prevention layer are layered in a thickness direction of the protecting plate. A region in the protecting plate overlapped with the display region of the display includes a window with which waterproof inspection is performed.