Optical Layered Structure Haze Gap Touch Display
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Solution Overview
Problem
Conventional touch display devices suffer from light refraction issues causing parallax and reduced image clarity due to air gaps between modules, and optical interference leading to glare and Newton's rings, which affect user comfort and image quality, with existing solutions either being costly or prone to damage.
Innovation Solution
A touch display device with an optical layered structure having a haze of 25% to 44% and a gap of 0.01 to 3 mm between the touch module and the optical layered structure, which includes a pressure-sensitive adhesive layer, optical compensation layer, polarizing layer, protective layer, and surface treatment layer, to minimize light refraction and interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an optical bonding layer is disposed between the touch module and the display module to fill the air gap, then light refraction and optical interference are reduced, but manufacturing cost increases
Solution Approach 1:
The patent changes the physical parameters of the gap by controlling its height (0.01-3mm) and introducing an optical layered structure with specific haze (25-44%), refractive index (1.3-1.7), and thickness (0.1-5mm). This parameter optimization reduces light refraction and optical interference effects while avoiding the need for expensive optical bonding layers, thereby resolving the contradiction between reducing harmful optical effects and maintaining manufacturing cost-effectiveness.
2Object-affected harmful factors
If an optical structure is disposed on the protective glass layer to reduce Newton's rings, then optical interference is reduced, but light reflection increases and the display module may be scratched
Solution Approach 1:
The patent introduces an optical layered structure as an intermediary element positioned between the touch module and display module. This intermediary layer with specific optical properties (haze 25-44%, refractive index 1.3-1.7) serves to reduce Newton's rings phenomenon without causing strong light reflection or physical damage to the display module, thereby resolving the contradiction between reducing optical interference and avoiding harmful side effects.
3Object-affected harmful factors
If the air gap between the touch module and display module is reduced, then light refraction impact is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The patent optimizes the gap height parameter to a specific range (0.01-3mm) and introduces an optical layered structure with controlled parameters (haze 25-44%, thickness 0.1-5mm). This parameter optimization allows the system to achieve good optical performance with reduced light refraction impact while maintaining reasonable manufacturing precision requirements, resolving the contradiction between reducing parallax phenomenon and avoiding excessive manufacturing precision demands.
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
Effectively eliminates Newton's rings, glare, and parallax phenomena, improving touch accuracy and image quality while maintaining cost-effectiveness and durability.
Implementation Method 1
light emitted from the display module to be refracted twice due to the difference in the refractive indexes of the display module, the air gap, and the protective glass layer
Implementation Method 2
light radiated from an ambient light source onto the touch display device to bring about phenomena of glare and/or Newton's rings due to optical interference
Data Source
AI summary
A touch display device includes a display module, a peripheral connector member, and a touch module. The display module includes a liquid crystal layer and an optical layered structure that is stacked on the liquid crystal layer. The peripheral connector member is disposed on a periphery of a top surface of the optical layered structure. The top surface of the optical layered structure faces away from the liquid crystal layer. The touch module is stacked on the peripheral connector member opposite to the optical layered structure so as to form a gap between the touch module and the optical layered structure. The optical layered structure has a haze ranging from 25% to 44%. The gap has a height that is measured from the touch module to the optical layered structure, and that ranges from 0.01 to 3 mm.