Watch Display Stack With Anti-Reflection Air Gap
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Solution Overview
Problem
In waterproof inspections of display apparatuses, such as watches, the presence of an air layer can cause light reflection, reducing visibility of the display due to the difference in refractive indices between the air layer and other components, especially when the air layer overlaps with the display region, leading to poor visibility and reliability in determining the waterproof properties.
Innovation Solution
A display apparatus design featuring a light-transmitting protecting plate, a light-transmitting solar panel positioned below the protecting plate, a display member with a viewable region, and an air layer between the solar panel and the display, along with light reflection prevention layers on the surfaces facing the air layer to minimize light reflection and enhance visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an air layer is provided between the protecting plate and the display member for waterproof inspection, then waterproof properties can be tested, but light reflection occurs at the boundary with the air layer reducing display visibility
Solution Approach 1:
A light reflection prevention layer is introduced as an intermediary between the air layer and the protecting plate/display member surfaces. This intermediary layer has a refractive index intermediate between air and the solid materials, reducing the refractive index difference at interfaces and minimizing light reflection, thereby maintaining both waterproof inspection capability and display visibility
Solution Approach 2:
The refractive index parameter of the interface between air and solid materials is modified by applying a light reflection prevention layer with specific refractive index characteristics. This parameter change reduces the abrupt refractive index difference, decreasing light reflection and improving display visibility while preserving the air layer's waterproof testing function
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 effectively suppresses light reflection, improves the transmittance rate, and ensures clear and vivid display visibility, even under conditions where the air layer is present, thereby enhancing the reliability of waterproof inspections and maintaining the original color representation, especially when viewed through polarizing sunglasses.
Implementation Method 1
visibility of the display of the display member may worsen due to reflection of light at a boundary with the air layer
Implementation Method 2
due to the difference in refractive indices between the air layer and other components
Data Source
AI summary
A display apparatus includes a protecting plate formed of a material which transmits light, light transmitting type solar panel which is positioned below the protecting plate, a display below the light transmitting type solar panel, which is provided in contact with the light transmitting type solar panel, and which includes a display region which can be viewed from outside. An air layer which is positioned between the protecting plate and the light transmitting type solar panel, and at least one light reflection prevention layer on at least one of a first surface of the protecting plate facing the air layer and a second surface of the light transmitting type solar panel facing the air layer, wherein the display region of the display can be viewed from outside through the protecting plate, the at least one light reflection prevention layer, the air layer, and the light transmitting type solar panel.