Cylinder Head Air-Layer Structure for Uniform LED Bonding Pressure
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Solution Overview
Problem
Existing technologies face challenges in providing uniform pressure to light emitting elements during the transfer and bonding process in display panel manufacturing, which can affect the electrical resistance and overall performance of the display device.
Innovation Solution
A cylinder head with a transmissive portion, brackets, and an elastic member is used to provide uniform pressure. The cylinder head includes air paths that allow air to be introduced or expelled, adjusting the pressure and position of the light emitting elements during the transfer and bonding process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional bonding methods are used, then the bonding process can be completed, but uniform pressure cannot be provided to the light emitting element
Solution Approach 1:
The cylinder head is divided into multiple functional regions including a compression region with first air paths and a decompression region with second air paths. The elastic member is segmented into multiple regions that can be independently controlled. This segmentation allows different areas to perform different functions (compression and decompression) simultaneously, achieving uniform pressure distribution across the light emitting element surface.
Solution Approach 2:
The system transitions from a static bonding structure to a dynamic one where air can be actively introduced and expelled through controlled air paths. The elastic member's deformation state is dynamically adjusted by controlling air pressure in the compression and decompression regions, allowing real-time pressure uniformity optimization during the bonding process.
2Reliability
If pressure is applied to the light emitting element, then bonding can be achieved, but electrical resistance may increase due to non-uniform pressure
Solution Approach 1:
The cylinder head design implements local quality by creating specific compression regions and decompression regions at different locations. The first air paths are positioned to compress specific areas while the second air paths manage decompression in other areas. This localized control ensures that pressure is optimally distributed across different regions of the light emitting element, preventing non-uniform pressure that would cause increased electrical resistance.
3Device complexity
If the cylinder head structure is simplified, then device complexity is reduced, but pressure control precision deteriorates
Solution Approach 1:
The cylinder head is designed as a multi-functional structure where a single component performs multiple functions: it provides structural support, creates compression zones, creates decompression zones, and enables precise pressure control. The air paths serve dual purposes of both compressing and decompressing different regions. This multi-functionality allows sophisticated pressure control without proportionally increasing device complexity.
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
The solution ensures uniform pressure is applied to the light emitting elements, improving the bonding process and reducing electrical resistance, thereby enhancing the performance and reliability of the display device.
Implementation Method 1
The elastic member may be stretched in the direction by air introduced through the second air path
Implementation Method 2
The elastic member may contract in the direction in case that air is expelled from the cylinder head through the second air path
Data Source
AI summary
A cylinder head, a transfer and bonding system and a method of driving the same to produce a display device that includes light emitting elements provides uniform pressure to light emitting elements during a transfer and bonding process. The cylinder head may include a first bracket accommodating the first transmissive portion; a second transmissive portion spaced apart from the first transmissive portion in a direction by an air layer; a second bracket accommodating the second transmissive portion; and an elastic member surrounding side surfaces of the first bracket and the second bracket, wherein one of the first bracket and the second bracket includes an air path that extends to the air layer.