Display Device Side Surface Pad Segmentation for Short Circuit Prevention
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Solution Overview
Problem
Existing display devices face challenges in minimizing the occurrence of short circuits between electrode pads, particularly in the non-display areas, which can lead to damage and reduced functionality.
Innovation Solution
A display device design featuring a side surface with distinct areas for display and touch connection pads, where a first circuit board with a display driving circuit is attached to display connection pads and a second circuit board with a touch driving circuit is attached to touch connection pads, using a manufacturing apparatus that includes laser modules for patterning and transferring conductive materials, and a pressing tool for bonding the circuit boards, thereby minimizing substrate damage and preventing short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pads and leads are bonded using direct surface contact or anisotropic conductive film, then bonding is achieved, but short circuits between separated pads may occur
Solution Approach 1:
The side surface is divided into multiple distinct areas: a first area for display connection pads, a second area for touch connection pads, and a third area that does not overlap with either. This spatial segmentation prevents short circuits by ensuring that display and touch pads are bonded in separate, non-overlapping regions, eliminating the harmful interaction between separated pads while maintaining reliable bonding in each designated area.
2Area of stationary object
If flexible film is attached to the side surface to reduce non-display area, then device compactness is improved, but short circuit risk between pads increases
Solution Approach 1:
Different regions of the side surface are assigned different functions with distinct properties. The first area is optimized for display connection pads, the second area for touch connection pads, and the third area serves as a non-overlapping region. This local differentiation ensures that each pad type is bonded in its designated zone, reducing short circuit risk while maintaining the compact side-surface attachment configuration.
3Adaptability or versatility
If display and touch pads are arranged on the same side surface, then device integration is improved, but short circuit occurrence between pads increases
Solution Approach 1:
The side surface is segmented into distinct functional areas: a first area for display connection pads and a second area for touch connection pads. This segmentation allows both display and touch functions to be integrated on the same side surface while preventing short circuits by ensuring that the pad areas are spatially separated and do not overlap, thus maintaining both integration and reliability.
4Productivity
If multiple pads are bonded in overlapping areas, then bonding efficiency is improved, but substrate damage and short circuits increase
Solution Approach 1:
The bonding process is segmented into distinct spatial zones on the side surface. Display connection pads are bonded in the first area, touch connection pads in the second area, with both areas being non-overlapping. This segmentation maintains bonding efficiency by providing dedicated bonding zones for each pad type while eliminating substrate damage and short circuits that would result from overlapping bonding operations.
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 effectively reduces the risk of short circuits between display and touch pads, ensuring reliable electrical connectivity and minimizing substrate damage during the manufacturing process, thus enhancing the durability and performance of the display device.
Implementation Method 1
a manufacturing apparatus that includes laser modules for patterning and transferring conductive materials
Implementation Method 2
a pressing tool for bonding the circuit boards
Data Source
AI summary
A display device includes a display panel including display pads, display connection pads disposed on a side surface of the display panel and connected to the display pads, a touch member including touch pads disposed on a display surface perpendicular to the side surface of the display panel, and touch connection pads overlapping a top surface of the touch member and the side surface of the display panel and connected to the touch pads. The side surface of the display panel includes a first area overlapping the display connection pads, a second area overlapping the touch connection pads, and a third area which does not overlap the display connection pads and does not overlap the touch connection pads. The first area, the second area, and the third area are located on a same plane.