Flexible Circuit Board Integration for Display Thickness Reduction
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Solution Overview
Problem
The thickness of display devices with touch display functions is increased due to multiple layers of flexible circuit boards, hindering miniaturization efforts.
Innovation Solution
Integration of functional modules for signal provision to both the light guiding film for buttons and the touch control unit onto a single flexible circuit board, positioned between the light guiding film and the display panel, reducing the number of layers and thus the thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple flexible circuit boards are provided for touch control and button functions, then the display device achieves complete touch control functionality, but the thickness of the display device increases
Solution Approach 1:
The patent merges the touch control flexible circuit board and button flexible circuit board into a single integrated flexible circuit board. The first flexible circuit board contains both the touch control unit for providing signals to the color filter substrate and the button functional module for providing signals to the light guiding film, thereby reducing the number of separate components and overall thickness while maintaining complete touch control functionality.
Solution Approach 2:
The first flexible circuit board is designed to perform multiple functions simultaneously - it serves as both the touch control flexible circuit board for driving the display panel and the button flexible circuit board for controlling button icons. This multi-functional design eliminates the need for separate dedicated circuit boards for each function, resolving the contradiction between functionality completeness and thickness reduction.
2Ease of manufacture
If multiple layers of flexible circuit boards are stacked in the thickness direction, then each functional module can be independently configured, but the overall device thickness increases
Solution Approach 1:
The patent combines multiple functional modules that were previously distributed across separate flexible circuit board layers into a single integrated first flexible circuit board. The circuit board includes both the touch control unit and button functional module in the same substrate, reducing the number of stacked layers while maintaining the ability to independently configure and route signals to different functional components through separate circuit traces on the same board.
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 integration reduces the thickness of the display device, facilitating miniaturization while maintaining functionality, and improves bonding stability with transparent adhesive glue, enhancing product quality.
Implementation Method 1
The detecting polarizer is bonded to the glass cover plate by bonding glue
Data Source
AI summary
A display device, comprising a display panel with a touch control unit, a glass cover plate being positioned at a light emitting side of the display panel, and a light guiding film for buttons being positioned on a side of the glass cover plate facing to the display panel, and further comprising a first flexible circuit board extended to be interposed between the light guiding film for buttons and the display panel, provided with a functional module electrically connected with the light guiding film for buttons and a functional module electrically connected with the touch control unit. A functional module for providing signals to the light guiding film for buttons and a functional module for providing signals to the touch control unit are integrated into one flexible circuit board, so that a thickness of one layer of flexible circuit board is reduced in the thickness direction of the display device.