Glass Touch Screen Protector With Spacer To Prevent Interference Fringes
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Solution Overview
Problem
Conventional touch screen protectors often trap air bubbles and dust, and require diligent cleaning to restore the screen's original luster when removed, and they typically come into direct physical contact with the screen, leading to interference fringes and potential damage.
Innovation Solution
A glass touch screen protector with a spacer that complements the chamfered edges of portable devices, using a thin, flexible glass sheet with a transparent window portion and a band around the perimeter, spaced from the screen by an adhesive spacer to prevent contact and reduce interference fringes, and featuring an anti-shatter membrane for safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a transparent plastic or PET touch screen protector is used, then the screen is protected, but air bubbles and dust are trapped and interfere with visibility and touch
Solution Approach 1:
The patent introduces an intermediary mechanism (application tool with squeegee edge) that mediates between the screen protector and screen to eliminate air bubbles and dust during application. This intermediary tool pushes out trapped contaminants and creates a bubble-free bond without requiring direct contact between the protector and screen surface.
2Reliability
If the touch screen protector is in direct physical contact with the touch screen, then protection is provided, but interference fringes appear and cleaning is required upon removal
Solution Approach 1:
The patent moves the protection function from direct surface contact to a dimensional offset where the screen protector is positioned slightly above the screen surface. This dimensional change eliminates optical interference fringes and prevents adhesive residue on the screen while maintaining protective coverage through the elevated positioning.
3Strength
If a rigid glass screen protector is used, then scratch resistance is improved, but the glass may shatter upon impact
Solution Approach 1:
The patent creates a composite protective structure by bonding a rigid glass layer to a flexible polymer substrate. This composite construction combines the scratch resistance of glass with the shock-absorbing properties of the flexible base, preventing shattering while maintaining surface hardness and optical clarity.
4Ease of operation
If adhesive is applied directly to the screen protector, then attachment to the screen is achieved, but removal leaves residue on the screen
Solution Approach 1:
The patent extracts the adhesive function from the screen protector itself and relocates it to a separate application tool. The adhesive is applied through the intermediary tool rather than being part of the protector, allowing clean removal of the protector without adhesive residue on the screen while maintaining secure attachment during use.
Data Source
Figure 1~2A
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Figure 5~5A
AI summary
A glass touch screen protector for a portable electronic device having a front face that includes a touch screen portion and a chamfered outer perimeter, the glass screen protector including a glass sheet having front and back sides, an outer band that corresponds to that of the device, and having a transparent window portion that corresponds in size to the touch screen portion. A spacer is provided along the outer perimeter of the glass sheet substantially continuously surrounding the transparent window. The spacer increases in thickness toward the periphery of the glass sheet and has a thickness sufficient to space the glass sheet near but not in contact with the touch screen portion. The spacer has an exposed adhesive facing the portable device and having adhesive strength enabling repeated removal and re-attachment.