Pad Electrode Convex Recess Structure for Laser Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices, such as LCDs and OLEDs, face challenges in protecting components like signal lines and transistors from damage caused by laser beams used in forming side pads, which can lead to wiring failures and reliability issues.
Innovation Solution
The use of pad electrodes with convex and recess portions on display panels, where the convex portions protrude and the recess portions recess, effectively block the laser beam from reaching sensitive components, preventing damage and eliminating the need for additional protective structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If laser beam is used to form side pads, then side pads can be precisely formed, but signal lines and transistors may be damaged by the laser beam
Solution Approach 1:
The patent introduces an intermediary structure (convex portion of pad electrode) that mediates between the laser beam and sensitive components. The convex portion acts as a physical barrier that blocks the laser beam from reaching signal lines and transistors, allowing the laser forming process to proceed without damaging sensitive components.
Solution Approach 2:
The convex portion of the pad electrode is formed in advance before the laser beam is applied to form side pads. This preliminary structural modification creates a protective barrier that prevents harmful laser effects before they can occur, eliminating the need for additional protective measures during the laser forming process.
2Reliability
If additional protective structures are added to block laser beam, then component protection is improved, but device size and cost increase
Solution Approach 1:
The pad electrode is given a dual function: it serves as both an electrical connection element and a protective barrier against laser beam. The convex portion of the pad electrode simultaneously provides electrical connectivity and blocks harmful laser radiation, eliminating the need for separate protective structures.
Solution Approach 2:
The protective function is merged into the existing pad electrode structure rather than being implemented as a separate component. The convex portion integrates protection against laser damage with the electrical connection function, simplifying the overall device structure and reducing component count.
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 solution enhances the reliability of display devices by preventing laser-induced damage to signal lines and transistors, thereby minimizing the size and cost of the devices without requiring additional protective structures.
Implementation Method 1
pad electrodes have a convex portion at a first side and a recess portion at a second side opposite to the first side, wherein the convex portion and the recess portion between adjacent pad electrodes are disposed to be engaged with each other... preventing a laser beam from reaching other components of the display panel
Data Source
AI summary
A display device may include a first substrate, a first conductive pad, a second conductive pad, a first pad electrode, and a second pad electrode. The first substrate may include a first face and a second face. The first conductive pad may be disposed on the first face. The second conductive pad may be disposed on the first face and may be spaced from the first conductive pad. The first pad electrode may be disposed on the second face, may be electrically connected to the first conductive pad, and may include a protrusion. The second pad electrode may be disposed on the second face, may be electrically connected to the second conductive pad, may be spaced from the first pad electrode, and may include a recess. The protrusion of the first pad electrode may be partially inside the recess the second pad electrode.