Display Panel Alignment Verification Using Dual-Side Lighting
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Solution Overview
Problem
The challenge in manufacturing display devices is ensuring accurate alignment between the side pad and lead lines bonded at the side surface of a display panel, which is crucial for bezelless designs but often difficult to achieve with existing methods.
Innovation Solution
A method involving fixing a display panel to a stage, attaching a printed circuit board to one side surface, and using lighting to check alignment between the side pad and lead lines, with the stage's stopper supporting the panel to facilitate accurate positioning and reflection of light for alignment verification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If signal lines and lead lines are bonded at a side surface to achieve bezelless display, then display area is increased, but alignment precision between side pad and lead line deteriorates
Solution Approach 1:
The patent introduces a lighting dimension by placing light sources at specific positions to illuminate the bonding area from multiple angles. This optical dimension enables visualization of the alignment state between side pad and lead line, transforming an invisible alignment problem into a visible one that can be detected and corrected.
Solution Approach 2:
The patent uses light as an intermediary to reveal the alignment relationship between side pad and lead line. By introducing lighting that creates visible shadows or light patterns, the alignment status becomes observable, allowing operators to adjust and verify alignment precision without directly viewing the microscopic bonding interface.
2Measurement precision
If lighting is used to check alignment at side surface, then measurement capability is improved, but device complexity increases
Solution Approach 1:
The patent applies lighting only at specific local positions where alignment verification is needed, rather than illuminating the entire display panel. The light sources are strategically placed to create optimal viewing angles for the bonding area, minimizing the lighting system's complexity while maximizing measurement precision at the critical location.
Solution Approach 2:
The lighting system is designed to automatically illuminate the bonding area when the display panel is in the alignment verification position. The stage structure itself incorporates or positions the light sources, making the lighting function integrated into the manufacturing equipment rather than a separate complex system.
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 method allows for precise alignment verification, enhancing the manufacturing process by ensuring correct bonding of the printed circuit board to the display panel, thereby supporting the production of bezelless display devices.
Implementation Method 1
a vacuum hole configured to absorb air to fix the display panel to the stage
Implementation Method 2
irradiating first side surface of the display panel with light from a first lighting, and irradiating a second side surface of the display panel opposite the first side surface of the display panel with light from a second lighting to check alignment of the printed circuit board
Data Source
AI summary
A method of manufacturing a display device includes fixing a display panel to a stage, attaching a printed circuit board to a first side surface of the fixed display panel, and irradiating the first side surface of the display panel with light from a first lighting and irradiating a second side surface of the display panel opposite the first side surface of the display panel with light from a second lighting to check alignment of the printed circuit board.