Display Panel Bonding With Optical Fixture Alignment Correction
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Solution Overview
Problem
Existing display panel bonding devices face challenges in achieving accurate alignment between the cover plate and bonding indenter due to processing and mounting errors, leading to complex and cumbersome correction processes with significant accuracy errors, which affect bonding yield.
Innovation Solution
A fixture assembly with alignment marks and an image acquisition system is used to align the bonding member base and display module base, enabling faster and more accurate alignment through image processing and adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a dowel pin mounting method is used to determine relative position between bases, then alignment of cover plate and bonding indenter is achieved, but processing error and mounting error of dowel pin cause deviation in relative position
Solution Approach 1:
The patent replaces the mechanical dowel pin positioning system with an optical measurement system. Image acquisition devices capture images of alignment marks on both bases, and image processing algorithms calculate the relative position and deviation. This substitution eliminates mechanical errors from dowel pin processing and mounting, achieving higher positioning accuracy through optical measurement and computational correction.
2Manufacturing precision
If several bonding experiments are conducted to calculate bonding error and adjust positioning thread gap, then center alignment of bases is achieved, but correction process becomes complex and cumbersome with large accuracy error
Solution Approach 1:
The patent performs alignment mark imaging and position calculation before the bonding process. By capturing images of alignment marks on both bases and calculating their relative positions in advance, the system determines the correction parameters needed for accurate bonding. This preliminary measurement and calculation eliminates the need for multiple trial bonding experiments, simplifying the correction process while improving accuracy.
3Manufacturing precision
If traditional dowel pin alignment method is used, then relative position between bases is determined, but multiple bonding experiments are required to achieve accurate alignment, reducing productivity
Solution Approach 1:
The patent replaces iterative mechanical trial-and-error alignment with a single-step optical measurement and computational correction system. Image acquisition devices and processing algorithms quickly determine the precise relative position of bases and calculate necessary corrections, eliminating the need for multiple bonding experiments. This dramatically reduces alignment time and improves productivity while maintaining high accuracy.
Data Source
AI summary
A display panel bonding device and a correction apparatus and method thereof. The correction apparatus includes: a fixture assembly including a first fixture and a second fixture coordinating with each other. The first fixture is provided with a first alignment mark, the second fixture is provided with a second alignment mark, and alignment between the first fixture and the second fixture is achieved via the first alignment mark and the second alignment mark; and an image acquisition assembly configured to acquire a first image of the first alignment mark of the first fixture and a second image of the second alignment mark of the second fixture respectively. The first image and the second image are used for acquiring an alignment parameter of the first alignment mark and the second alignment mark to correct alignment between the first fixture and the second fixture.