Chamfered Display Wiring for Bezel-Less Connection Reliability
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Solution Overview
Problem
The challenge of achieving a bezel-less display device design while ensuring reliable electrical connections and minimizing the bezel area to maximize the display area remains unsolved in existing technologies.
Innovation Solution
The proposed display device incorporates a substrate with chamfered surfaces and specialized connection wirings, including peeling portions with reduced widths, to facilitate electrical connections between pads and light-emitting elements, and utilizes flip-chip type micro LEDs, along with side and bottom connection wirings to minimize bezel space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If wirings are formed on the side surface of the substrate to minimize bezel area, then the display area is maximized, but the wirings are more prone to chipping and cracking
Solution Approach 1:
The patent applies beforehand cushioning by forming a chamfered surface at the edge of the substrate before forming the wirings on the side surface. This chamfered surface acts as a cushioning structure that prevents direct stress concentration at the sharp edge, thereby reducing the likelihood of chipping and cracking in the side-wired connections while maintaining the bezel-less display design
2Area of stationary object
If the wiring width is reduced to fit in the minimized bezel area, then the display area is maximized, but the electrical connection reliability deteriorates
Solution Approach 1:
The patent applies local quality by varying the width of the upper connection wiring at different locations. The wiring has a first width at the contact portion for reliable electrical connection and a second, smaller width at the peeling portion for fitting in the minimized bezel area. This local variation in wiring width allows the system to simultaneously achieve both reliable electrical connection and maximized display area
Data Source
AI summary
A display device is provided. The display device includes a substrate including a first surface, a second surface opposite to the first surface, a first chamfered surface extending from one side of the first surface, a second chamfered surface extending from one side of the second surface, and a first side surface between the first chamfered surface and the second chamfered surface, a first pad on the first surface of the substrate, and an upper connection wiring on the first surface of the substrate, between the substrate and the first pad, electrically connected to the first pad, and including a first contact portion electrically connected to the first pad, and a first peeling portion extending from the first contact portion in a direction toward the first chamfered surface, and having a width that is less than a width of the first contact portion.