Infrared Touch Display Microstructure Layer Anti-Glare
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Solution Overview
Problem
Infrared touch display devices suffer from 'rainbow mura' due to uneven cover plate thickness caused by vacuum pressure, leading to visual distortions.
Innovation Solution
A microstructure layer with a rugged diffuse reflection surface is introduced between the cover plate and the display panel, along with an anti-glare layer, to address the issue of uneven thickness and improve visual clarity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a vacuum room is created between the cover plate and the display panel, then the bonding strength is improved, but the cover plate bends and thickness becomes uneven causing rainbow mura
Solution Approach 1:
A support structure is introduced as an intermediary component between the cover plate and the display panel. This support structure fills the vacuum room and provides mechanical support to the cover plate, preventing it from bending under vacuum pressure while maintaining the vacuum seal for bonding.
Solution Approach 2:
The support structure changes the mechanical parameter distribution within the vacuum room. By introducing this structural element, the stress distribution on the cover plate is modified, preventing excessive bending and maintaining thickness uniformity while preserving the vacuum bonding effect.
2Area of stationary object
If the cover plate is stretched to fill the vacuum room, then the bonding coverage is improved, but the thickness becomes uneven causing light path differences and rainbow mura
Solution Approach 1:
The support structure serves as a mediator that allows the cover plate to maintain its shape without excessive stretching. It provides localized support points that distribute the vacuum pressure evenly, enabling adequate bonding coverage while preventing the cover plate from deforming and creating thickness variations.
3Ease of manufacture
If no anti-glare measure is taken, then the manufacturing process is simple, but rainbow mura affects visual effects
Solution Approach 1:
The support structure acts as an intermediary element that indirectly addresses the rainbow mura issue by maintaining cover plate thickness uniformity. While not a direct anti-glare component, it prevents the formation of optical path differences that cause rainbow mura, thereby improving visual effects without significantly complicating the manufacturing process.
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 microstructure layer enhances the anti-glare function, reducing visual interference and improving the display's visual effects by minimizing rainbow mura and enhancing user experience.
Implementation Method 1
the microstructure layer has a rugged diffuse reflection surface having the anti-glare function
Data Source
AI summary
An infrared touch display device is provided to include a display panel, an optical adhesive layer, a cover plate and an infrared touch panel that are overlapped in an order from bottom to top, and a microstructure layer. The optical adhesive layer is shaped as a ring and disposed in a peripheral area of an upper surface of the display panel. The area encompassed by the optical adhesive layer forms a vacuum room. The cover plate is disposed on the optical adhesive layer. The infrared touch panel is disposed on the cover plate. The microstructure layer is disposed at a side of the cover plate and has an anti-glare function.