Display Device Connection Wire Traversing Bending Area

Solution Overview

Problem

Existing display devices face challenges in reducing dead space and enhancing electrical connection reliability between touch wires and pads without using bridge wires.

Innovation Solution

A display device design that includes a substrate with a display area, non-display area, and additional area featuring a sensing electrode, pad, and connection wire, where the connection wire is directly connected to the pad and traverses the bending area, eliminating the need for bridge wires and reducing dead space.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a bridge wire is used to electrically connect the wire and the pad, then electrical connection is achieved, but dead space increases and bezel thickness increases

Engineering Contradiction:

Improveelectrical connection reliabilityVSAvoiddead space

Core Design Contradiction:

ReliabilityVSArea of stationary object

Solution Approach 1:

The patent removes the bridge wire component from the display device structure. Instead of using a separate bridge wire to connect the wire and pad, the connection wire is extended directly to the pad, eliminating the need for the bridge wire and thereby reducing dead space in the non-display area.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent merges the function of the connection wire with the electrical connection function previously performed by the bridge wire. The connection wire is extended to directly contact the pad, combining the signal transmission path and the electrical connection into a single continuous structure, which eliminates dead space while maintaining electrical connectivity.

Inventive Principle:

Principle #5Merging (Combining)

2Reliability

If a bridge wire is used to electrically connect the wire and the pad, then electrical connection is achieved, but bezel thickness increases

Engineering Contradiction:

Improveelectrical connection reliabilityVSAvoidbezel thickness

Core Design Contradiction:

ReliabilityVSLength of stationary object

Solution Approach 1:

The patent removes the bridge wire component from the display device structure. Instead of using a separate bridge wire to connect the wire and pad, the connection wire is extended directly to the pad, eliminating the need for the bridge wire and thereby reducing dead space in the non-display area.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent merges the function of the connection wire with the electrical connection function previously performed by the bridge wire. The connection wire is extended to directly contact the pad, combining the signal transmission path and the electrical connection into a single continuous structure, which eliminates dead space while maintaining electrical connectivity.

Inventive Principle:

Principle #5Merging (Combining)

3Area of stationary object

If the connection wire is directly connected to the pad, then dead space is reduced, but electrical connection reliability may be compromised

Engineering Contradiction:

Improvedead spaceVSAvoidelectrical connection reliability

Core Design Contradiction:

Area of stationary objectVSReliability

Solution Approach 1:

The patent incorporates a bending area in the additional area that allows the connection wire to be pre-configured with a specific geometry. This preliminary structural arrangement ensures that the wire can accommodate mechanical stress and movement while maintaining reliable electrical connection to the pad, preventing connection failure despite the direct connection approach.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent creates a bending area in the additional area that provides flexibility to the connection wire structure. This flexible region allows the wire to deform and absorb mechanical stress without breaking the electrical connection, thereby maintaining reliability while enabling direct connection that reduces dead space.

Inventive Principle:

Principle #30Flexible shells and thin films

Data Source

PatentUS11456348B2Display device

Publication Date: 2022.09.27 SAMSUNG DISPLAY CO LTD

AI summary

A display device includes a substrate, a pixel, an encapsulation film, a sensing electrode, a pad, a connection wire, and an extension pattern. The substrate include a display area, a non-display area outside the display area, an additional area at a side of the non-display area, and a bending area defined in at least a portion of the additional area. The pixel is on the display area. The encapsulation film is on the pixel. The sensing electrode is on the encapsulation film. The pad is on the additional area. The connection wire is on the non-display area and is directly connected to the sensing electrode. The extension pattern directly connects the pad and the connection wire to each other. The extension pattern traverses the bending area.