Display Panel Side Coating Device with Masking Stages
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Solution Overview
Problem
Manual coating of side surfaces in liquid crystal display apparatuses often results in deviations and light leakage issues due to the lack of precise control, leading to defective products.
Innovation Solution
A coating device comprising an upper and lower stage with a spraying part that precisely applies a light-blocking ink to the side surfaces of display panels, forming a uniform coating layer with specific shapes like L or C cross-sections to prevent light leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual coating method is used, then ease of operation is improved, but manufacturing precision deteriorates
Solution Approach 1:
The patent replaces the manual mechanical coating system with an automated spraying system that uses compressed gas to atomize and deposit ink particles. The spraying part includes a nozzle that sprays ink in a predetermined direction onto the side surface, eliminating manual application while achieving uniform coating thickness and precise coverage.
Solution Approach 2:
The patent changes the physical state and application parameters of the coating material by using spray atomization instead of manual brushing. The ink is sprayed as fine particles with controlled velocity and distribution, allowing precise control of coating thickness and uniformity that cannot be achieved through manual methods.
2Manufacturing precision
If automated spraying is used, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The patent divides the coating device into distinct functional modules: a spraying part for ink application, a supporting part for holding the display panel, and a masking part for protecting specific areas. This segmentation allows each component to be optimized independently while maintaining overall system precision.
Solution Approach 2:
The spraying part is designed to perform multiple functions: atomizing the ink, directing the spray onto the side surface, and controlling the deposition pattern. The masking part can be configured to protect different areas (front surface, rear surface, or both), making the device adaptable to various coating requirements without requiring complete redesign.
3Reliability
If uniform coating is achieved, then light leakage is reduced, but coating time increases
Solution Approach 1:
The patent applies masking before the spraying process to pre-defin e the coating boundaries and protected areas. By preparing the masking structure in advance, the spraying process can proceed directly to uniform deposition without requiring post-coating adjustments or rework, thus reducing total processing time while ensuring complete coverage.
Solution Approach 2:
The spraying process is designed to continuously deposit ink material onto the side surface in a controlled manner. The automated spraying system maintains consistent spray velocity, angle, and distance, ensuring uniform coating formation in a single continuous operation rather than requiring multiple intermittent applications.
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 high light efficiency and reduces light leakage by forming a uniform, precise light-blocking coating layer on the side surfaces of display panels, improving the manufacturing process and product quality.
Implementation Method 1
The spraying part sprays ink to a side surface of the display panel
Data Source
AI summary
A coating device includes an upper stage, a lower stage and a spraying part. The upper stage masks an upper surface of a display panel. The lower stage masks a lower surface of the display panel. The spraying part sprays ink to a side surface of the display panel. The side surface of the display panel is exposed between the upper stage and the lower stage. The coating device includes the upper stage and the lower stage, so that the coating device may form a coating layer of uniform thickness by precisely spraying ink. In addition, a cross-section of the coating layer may be precisely formed having specific shape such as an L or C shape. A display apparatus having high light usage efficiency and reduced light leakage may be provided by using the coating device.