Rear-Surface Bonded Display Panel with Pad Hole
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Solution Overview
Problem
Conventional display panels face challenges in aesthetics due to visible boundaries between adjacent active areas, which are exacerbated by the need for separate spaces for bonding driving units, leading to reduced viewability and increased dead space.
Innovation Solution
The display panel design incorporates a driving unit bonded to the rear surface of the display panel, eliminating the need for a separate space on the front surface and utilizing an anisotropic conductive film for connection, thereby reducing the boundary width between active areas and enhancing aesthetics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the driving unit is bonded to the front surface of the display panel, then the connection is achieved through conventional TAB mounting process, but the boundary width between active areas increases and aesthetics deteriorate
Solution Approach 1:
The patent moves the driving unit bonding location from the front surface (2D plane) to the rear surface (another dimension), allowing the connection to occur behind the display panel. This dimensional shift eliminates the need for front surface bonding space, reducing the boundary width between active areas and improving aesthetics while maintaining conventional manufacturing processes.
2Reliability
If separate spaces are allocated for bonding driving units on the front surface, then the connection is secured, but the dead space increases and viewability decreases
Solution Approach 1:
The patent extracts the driving unit bonding operation from the front surface area and relocates it to the rear surface. This extraction removes the disturbing element (bonding space requirement) from the active display area, eliminating dead space and improving viewability while maintaining reliable electrical connections through the ACF bonding process.
3Shape
If the driving unit is bonded to the rear surface of the display panel, then the boundary width between active areas is reduced and aesthetics improve, but the connection structure becomes more complex
Solution Approach 1:
The patent introduces an anisotropic conductive film (ACF) as an intermediary element that facilitates the connection between the driving unit and display panel when bonded to the rear surface. This mediator enables electrical connection through the rear bonding configuration, managing the structural complexity by providing a standardized interface layer that simplifies the overall connection architecture.
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 improves aesthetics by minimizing visible boundaries and dead space, resulting in improved viewability and a more seamless display experience.
Implementation Method 1
a tape automated bonding ('TAB') mounting process which uses an anisotropic conductive film ('ACF') to bond a flexible circuit board to a display panel
Data Source
AI summary
A display panel includes a pad line disposed on a rear surface of a base layer and a connection line disposed on a front surface of the base layer. The pad line and the connection line are connected in an area overlapping a pad hole defined to pass through the base layer, and the pad line is connected to a driving unit on the rear surface of the base layer.