Arbitrary-Shape Display Window With High-Index Insulation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional display apparatuses with dome-shaped window layers suffer from reduced visibility due to concentrated radiation intensity, making the touch sensor patterns visible under external illumination, which degrades the display's clarity.
Innovation Solution
Incorporating an insulation layer with a higher refractive index between the window layer and the touch sensor layer to redirect light and prevent concentration of radiation intensity, thereby enhancing visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a dome-shaped window layer is used, then the display structure is simplified and manufacturing is easier, but radiation intensity becomes concentrated making touch sensor patterns visible under external illumination
Solution Approach 1:
An insulation layer with higher refractive index is introduced as an intermediary between the window layer and touch sensor layer. This intermediate layer redirects light that would otherwise concentrate on the touch sensor patterns, preventing the harmful visibility effect while maintaining the dome-shaped window structure's manufacturing advantages
Solution Approach 2:
The refractive index parameter of the insulation layer is specifically optimized to be higher than both the window layer and touch sensor layer. This parameter change enables effective light redirection at the interfaces, solving the visibility problem without requiring structural changes to the dome-shaped window
2Device complexity
If the window layer is made dome-shaped, then structural complexity is reduced, but light concentration occurs causing touch sensor patterns to become visible
Solution Approach 1:
The insulation layer serves as a mediating optical element between the dome-shaped window and touch sensor. It intercepts and redirects concentrated light before it reaches the touch sensor patterns, eliminating visibility issues while preserving the simple dome structure
Solution Approach 2:
The display structure employs a composite multi-layer configuration with different refractive indices (window layer, insulation layer, touch sensor layer). This composite structure leverages refractive index differences to control light propagation and prevent harmful concentration effects
3Object-affected harmful factors
If an insulation layer with higher refractive index is added, then light redirection and visibility improvement are achieved, but device complexity increases
Solution Approach 1:
The insulation layer performs multiple functions simultaneously: it provides electrical insulation between layers, redirects concentrated light to improve visibility, and maintains structural integrity. This multi-functionality justifies the additional layer without proportionally increasing complexity
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 insulation layer effectively redirects light, reducing the visibility of touch sensor patterns under external illumination and improving the overall display's clarity and visibility.
Implementation Method 1
An insulation layer is disposed between the window layer and the touch sensor layer. The insulation layer has a second refractive index that is greater than the first refractive index.
Data Source
AI summary
A display apparatus includes a display panel having a display unit. A touch sensor layer is disposed on the display panel. A window layer is disposed on the touch sensor layer. The window layer has a first refractive index and includes a first surface and a second surface opposite the first surface. An insulation layer is disposed between the window layer and the touch sensor layer. The insulation layer has a second refractive index that is greater than the first refractive index.