Touch Display Adhesive Layer Light Blocking Bezel Reduction
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Solution Overview
Problem
Conventional touch display devices with touch screen panels have a wide bezel area and visible metal lines due to the placement of touch screen components, which increases the device thickness and reduces user interface aesthetics.
Innovation Solution
A touch display device configuration featuring an adhesive layer with a black material between the display panel and the touch screen panel, allowing metal lines to be integrated into the active area and reducing the bezel width, along with a single optically clear adhesive between the window member and the display panel to minimize overall thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If metal lines of the touch screen panel are positioned apart from the display panel to prevent visibility, then the visibility of metal lines is reduced, but the width of the bezel area increases
Solution Approach 1:
A black adhesive layer is introduced as an intermediary between the display panel and the touch screen panel. This adhesive layer blocks light from reaching the metal lines of the touch screen panel, preventing their visibility without requiring the metal lines to be positioned apart from the display panel. The adhesive layer acts as a light-blocking barrier that eliminates the need for increased bezel width.
2Reliability
If two sheets of optically clear adhesive are used to attach the touch screen panel and window member, then the attachment is secure, but the thickness of the touch display device increases
Solution Approach 1:
The patent combines the adhesive layer that attaches the touch screen panel to the display panel with the light-blocking function. A single adhesive layer performs both the attachment function and the light-blocking function, eliminating the need for separate adhesive sheets. This merging of functions reduces the overall thickness while maintaining secure attachment.
Solution Approach 2:
The adhesive layer is designed to serve multiple functions simultaneously: it provides mechanical attachment between the touch screen panel and display panel, and it blocks light to prevent metal line visibility. This multi-functionality eliminates the need for additional adhesive sheets, thereby reducing device thickness.
3Length of stationary object
If a single optically clear adhesive is used between the window member and display panel, then the overall thickness is reduced, but the attachment security may be compromised
Solution Approach 1:
The adhesive layer is designed to perform both attachment and light-blocking functions in a single layer, ensuring that attachment security is not compromised while reducing thickness. The adhesive material and structure are optimized to provide sufficient bonding strength while maintaining the light-blocking property.
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 configuration decreases the bezel width, reduces the visibility of metal lines, and minimizes the overall thickness of the touch display device while maintaining functionality.
Implementation Method 1
The adhesive layer is configured to block light in at least a portion thereof
Data Source
AI summary
A touch display device includes a touch screen, a display panel, a window member, and an adhesive layer. The display panel is configured to display an image and includes a first curved surface area. The window member is disposed on the display panel and includes a second curved surface area disposed in correspondence with the first curved surface area. The adhesive layer is disposed between the display panel and the touch screen panel and is configured to block light in at least a portion thereof. The display panel is disposed between the window member and the touch screen panel.