Liquid Crystal Display Sealant with Communication Path
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Solution Overview
Problem
High-definition liquid crystal display devices face issues with uneven display quality due to substrate warping and pressure-induced pixel electrode movement, leading to color shifts and uneven liquid crystal distribution between display portions.
Innovation Solution
A display device configuration featuring a first and second display portion, surrounded by light shields, with a liquid crystal layer and sealants that allow communication between the portions through openings in the second sealant, enabling even distribution and flow of liquid crystal material to maintain consistent display quality and prevent substrate warping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a liquid crystal display device is designed with high definition, then display quality is improved, but the pixel electrodes and color filter slide easily due to pressure with light load, leading to color shifts
Solution Approach 1:
The patent introduces a communication path between display portions before the device is fully assembled and sealed. This allows liquid crystal material to be preliminarily distributed and balanced across different display portions, preventing color shifts that would otherwise occur due to substrate warping and pixel electrode sliding under light load pressure.
Solution Approach 2:
The patent uses a sealant with an opening (communication path) as an intermediary structure. This opening allows liquid crystal material to flow between display portions, acting as a mediator that balances the liquid crystal distribution and maintains consistent display quality across the entire device, preventing the harmful effects of substrate warping.
2Device complexity
If the cell gap is changed due to substrate warping, then the device structure is simplified, but uneven display occurs
Solution Approach 1:
The sealant with an opening serves as an intermediary that allows liquid crystal material to flow between display portions. This communication path compensates for cell gap variations caused by substrate warping, ensuring that liquid crystal distributes evenly across the entire device and maintaining display uniformity without requiring complex substrate flatness control mechanisms.
Solution Approach 2:
The communication path enables the liquid crystal display device to self-regulate and self-correct. The liquid crystal material automatically flows from regions with larger cell gap to regions with smaller cell gap through the communication path, equalizing the distribution and compensating for substrate warping effects without external intervention.
3Ease of manufacture
If liquid crystal material is unevenly distributed between display portions, then manufacturing process is simplified, but color consistency deteriorates
Solution Approach 1:
The sealant with an opening creates a communication path that acts as an intermediary, allowing liquid crystal material to flow freely between different display portions. This enables automatic balancing of liquid crystal distribution, ensuring color consistency across the entire device while maintaining a simplified manufacturing process where liquid crystal can be filled in one operation.
Solution Approach 2:
The communication path enables the liquid crystal distribution system to be self-balancing. After initial filling, the liquid crystal material automatically redistributes itself through the communication path, flowing from overfilled regions to underfilled regions, thereby achieving uniform distribution and color consistency without requiring complex precision filling equipment or multiple filling steps.
Data Source
AI summary
According to one embodiment, a display device includes a first display portion including a first pixel, a second display portion including a second pixel, a first light shield surrounding the first display portion and the second display portion, a second light shield disposed between the first display portion and the second display portion, a liquid crystal layer disposed in the first display portion and the second display portion, a first sealant overlapping the first light shield and sealing the liquid crystal layer in the first display portion and the second display portion, and a second sealant overlapping the second light shield. The second sealant has at least one opening through which the first display portion and the second display portion communicate.