Vacuum-Bonded Infrared Touch Display Cover Plate
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Infrared touch display devices using air-bonding technology suffer from poor waterproof and dustproof effects and a sense of separation due to the reliance on sealants, which affects user experience and signal transmission.
Innovation Solution
A method involving vacuum bonding of the cover plate to the display panel using a sealant, where the central portion of the cover plate is recessed and sealed, eliminating the cavity and enhancing bonding, and the infrared touch components are placed in a non-recessed area to prevent signal obstruction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If air-bonding technology is used to bond the cover plate to the display panel, then the manufacturing cost is reduced, but the waterproof and dustproof effects deteriorate due to cavity formation
Solution Approach 1:
The patent applies sealant to the periphery of the display panel or cover plate before bonding, creating a preliminary sealing structure. This preliminary action ensures that when the cover plate is bonded to the display panel, the sealant is already in position to prevent water and dust penetration, eliminating the need for post-bonding sealing adjustments and ensuring reliable waterproof and dustproof effects from the start.
Solution Approach 2:
The patent changes the bonding parameters by using specific bonding pressures and curing conditions that enable the sealant to form an effective seal while maintaining cost-effective air-bonding technology. By optimizing the bonding pressure and curing temperature, the sealant achieves proper adhesion and sealing performance, resolving the contradiction between low-cost manufacturing and reliable waterproofing.
2Ease of manufacture
If air-bonding technology is used to bond the cover plate, then the manufacturing cost is reduced, but the sense of separation increases resulting in poor user experience
Solution Approach 1:
The sealant is applied in advance to the periphery of the display panel or cover plate, creating a pre-formed sealing structure that eliminates the cavity between the cover plate and display panel. This preliminary sealing action ensures that when users interact with the device, there is no sense of separation or gap, providing a smooth and unified tactile experience while maintaining the cost advantages of air-bonding technology.
3Device complexity
If the cover plate is bonded with a cavity formed between central portions, then the bonding simplicity is maintained, but the infrared touch performance deteriorates due to signal blocking when the cover plate protrudes
Solution Approach 1:
The sealant is applied to the periphery before bonding, creating a preliminary sealing structure that prevents cavity formation between the central portions of the cover plate and display panel. This preliminary sealing ensures that the cover plate bonds flush to the display panel, eliminating protrusions that would block infrared signals, while keeping the bonding process simple and straightforward.
Solution Approach 2:
The patent optimizes bonding parameters such as pressure and temperature to ensure the cover plate bonds evenly to the display panel without forming cavities or protrusions. By controlling these parameters, the simple bonding process achieves reliable infrared touch performance, as the cover plate surface remains flat and does not interfere with infrared signal transmission.
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
This method improves user experience by eliminating the sense of separation and enhancing waterproof and dustproof effects, while maintaining low costs and simplicity, ensuring stable signal transmission and effective touch performance.
Implementation Method 1
delivering the cover plate and the display panel into a vacuum chamber, and vacuuming the vacuum chamber by using a vacuum pump
Implementation Method 2
in a vacuum environment, a portion of the cover plate corresponding to a central portion surrounded by the sealant is recessed toward the display panel and closely attached to the display panel
Implementation Method 3
the display panel and the cover plate are heated by a heating device in the vacuum chamber in a vacuum environment, so that the sealant is melted and deformed
Implementation Method 4
the cover plate and the display panel are irradiated with an ultraviolet ray so that the melted sealant is cured
Data Source
AI summary
The present application provides an infrared touch display device and a fabrication method thereof. In the present application, a cover plate coated with a sealant and a display panel are sent into a vacuum chamber and vacuumed; when the cover plate is attached to the display panel, the cover plate corresponds to The portion of the central portion enclosed by the frame rubber is recessed toward the display panel side and closely fits with the display panel, and the periphery of the display panel and the periphery of the cover plate are sealed by the sealant; Group infrared emitting tubes and infrared receiving tube.