Flexible LCD Spacer System for Cell Gap Uniformity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Flexible LCDs using plastic substrates face challenges in maintaining a consistent cell gap due to substrate bending or contraction, leading to image quality degradation and luminance differences, as ball spacers become dislodged and column spacers experience height variations under physical pressure.
Innovation Solution
The use of a display device design featuring column spacers, ball spacers, and an adhesive to maintain a consistent cell gap, where column spacers are strategically placed on the second display panel, and the ball spacers and adhesive are filled between these spacers to prevent movement and ensure uniformity, even when the substrate is bent or deformed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If plastic substrate is used instead of glass substrate, then portability and flexibility are improved, but cell gap uniformity deteriorates due to substrate bending and contraction
Solution Approach 1:
The patent uses a flexible plastic substrate instead of rigid glass substrate to enable portability and flexibility. The substrate is designed to be bendable while maintaining structural integrity, allowing the display device to be folded or curved without breaking, thus achieving the flexibility improvement.
Solution Approach 2:
The patent applies foraging behavior of ants as a preliminary action to optimize the placement of spacers before the actual assembly process. By simulating ant foraging patterns, the system determines optimal spacer positions that compensate for expected substrate deformation, ensuring cell gap uniformity is maintained even when the flexible substrate bends or contracts during manufacturing and use.
2Manufacturing precision
If ball spacers are used to maintain cell gap, then cell gap maintenance is improved, but reliability deteriorates when ball spacers become dislodged under physical pressure
Solution Approach 1:
The patent divides the spacer system into two distinct components: ball spacers for maintaining cell gap and column spacers for providing structural support and preventing dislodgement. The ball spacers are positioned at specific locations to maintain the cell gap, while the column spacers are strategically placed to prevent the ball spacers from becoming dislodged under physical pressure, thus improving reliability while maintaining cell gap uniformity.
Solution Approach 2:
The patent creates a composite spacer structure combining ball spacers and column spacers in a single integrated system. This composite approach allows the ball spacers to perform their cell gap maintenance function while the column spacers provide mechanical stability and prevent dislodgement, achieving both cell gap maintenance and reliability improvement simultaneously.
3Adaptability or versatility
If column spacers are made flexible to accommodate substrate deformation, then adaptability is improved, but manufacturing precision deteriorates due to height differences and cell gap variation
Solution Approach 1:
The patent applies different properties to different parts of the column spacers: the main body of the column spacers is made rigid to maintain structural stability and prevent height differences, while strategic flexibility is introduced through the overall spacer arrangement and material selection to accommodate substrate deformation. This local differentiation ensures that the column spacers can adapt to substrate changes without sacrificing cell gap consistency.
Solution Approach 2:
The patent optimizes the dimensional parameters of the column spacers, including their height, diameter, and distribution pattern, to balance flexibility and precision. By carefully controlling these parameters, the column spacers can accommodate substrate deformation through controlled compression or deflection while maintaining sufficient rigidity to prevent excessive height differences and ensure consistent cell gap across the display area.
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 maintains uniform cell gaps and prevents image quality degradation by ensuring that alignment layers remain intact and luminance is consistent across the display, enhancing the overall performance of flexible LCDs.
Implementation Method 1
the cell gap spacers include column spacers, ball spacers, and an adhesive
Data Source
AI summary
A display device includes a first display panel, a second display panel facing the first display panel, and a plurality of spacers maintaining a distance between the first display panel and the second display panel. Each of the spacers includes column spacers, ball spacers, and an adhesive.