Shielding Double-Sided Tape for Flat Display Fastening
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Solution Overview
Problem
Conventional flat displays in portable electronic devices face issues with the flexible printed circuit board not being securely adhered to the backlight module, leading to potential separation of the display panel, light leakage due to misalignment of the light source, and increased costs associated with double-sided tapes.
Innovation Solution
A shielding double-sided tape with a frame shielding portion and an extending portion is used to securely fasten the flexible printed circuit board to the backlight module, reducing material costs and assembly time by forming the extending portion from the window area of the frame shielding portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a shielding double-sided tape is used to fasten the flexible printed circuit board to the backlight module, then the attachment reliability is improved, but the device complexity increases due to additional components and assembly steps
Solution Approach 1:
The patent combines the shielding double-sided tape and the fastening function into a single integrated component. The shielding double-sided tape simultaneously serves as both the shielding element and the fastening element, eliminating the need for separate fastening components and reducing assembly steps while improving attachment reliability.
Solution Approach 2:
The shielding double-sided tape performs multiple functions: it provides electromagnetic shielding, fastens the flexible printed circuit board to the backlight module, and maintains structural stability. This multi-functional design reduces the number of components needed while improving overall attachment reliability.
2Reliability
If multiple double-sided tapes are used for fastening different components, then the attachment reliability is improved, but the manufacturing cost increases
Solution Approach 1:
The patent merges the functions of multiple double-sided tapes into a single shielding double-sided tape that simultaneously fastens both the display panel and the flexible printed circuit board to the backlight module, reducing material costs while maintaining attachment reliability.
Solution Approach 2:
The shielding double-sided tape is designed to perform multiple fastening functions across different components (display panel and flexible printed circuit board), replacing multiple specialized tapes with one universal fastening solution that reduces overall material expenditure.
3Device complexity
If the flexible printed circuit board is not securely adhered to the backlight module, then the device complexity is reduced, but the reliability deteriorates due to potential separation and light leakage
Solution Approach 1:
The patent integrates the shielding function and the secure fastening function into a single component, ensuring that the flexible printed circuit board is reliably attached to the backlight module without requiring additional complex fastening mechanisms, thus maintaining simplicity while improving reliability.
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 solution ensures firm attachment of the display panel, flexible printed circuit board, and light source, preventing light leakage and reducing material costs by eliminating the need for additional double-sided tapes, thus enhancing the overall assembly efficiency and reducing material expenses.
Implementation Method 1
The shielding double-sided tape includes a frame shielding portion adhered to a front surface of the backlight module, and an extending portion extended from the frame shielding portion. A surface of at least one part of the extending portion is adhered to a back surface of the backlight module, and another surface of the least one part of the extending portion is adhered to the flexible printed circuit board.
Data Source
AI summary
A flat display is disclosed, which includes a backlight module, a display panel, a flexible printed circuit board physically connected to the display panel, and a shielding double-sided tape for fastening the flexible printed circuit board on the backlight module. The shielding double-sided tape includes a frame shielding portion adhered to a front surface of the backlight module, and an extending portion extended from the frame shielding portion. A surface of at least one part of the extending portion is adhered to a back surface of the backlight module, and another surface of the least one part of the extending portion is adhered to the flexible printed circuit board.