Photosensitive Gap Material Barrier for Liquid Crystal Display Air Bubble Prevention
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Solution Overview
Problem
COA (Color Filter on Array) liquid crystal display panels are prone to air bubble formation during assembly, which can lead to abnormal displaying and reduced product yield due to gaps in the structural design.
Innovation Solution
A liquid crystal display panel with a photosensitive gap material barrier encircling the display zone, featuring recessed cavities that alter the flowability of liquid crystals and air bubbles, preventing their spread into the display zone by forming a gap with the enclosing resin and display zone.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If COA technique is used to increase pixel aperture ratio and display quality, then displaying quality is improved, but air bubbles are more easily generated during assembly
Solution Approach 1:
A photosensitive gap material barrier is introduced as an intermediary component between the array substrate and CF substrate. This barrier includes a photosensitive gap material layer with through-holes that extends from the first substrate to the second substrate, creating a controlled pathway that prevents air bubbles from entering the display zone while maintaining the COA structure's display quality benefits
Solution Approach 2:
The photosensitive gap material barrier is selectively positioned only at specific locations (circumferential direction of the display zone) where air bubble intrusion is most likely to occur. The through-holes in the barrier allow local controlled passage while the barrier itself blocks harmful air bubbles, creating local quality differentiation between blocked and permitted pathways
2Object-affected harmful factors
If photosensitive gap material barrier is added to block air bubbles, then air bubble prevention is improved, but device complexity increases
Solution Approach 1:
The photosensitive gap material barrier merges multiple functions into a single component: it serves as both a structural element defining the gap between substrates and an air bubble barrier. The through-holes in the barrier simultaneously maintain liquid crystal filling pathways and block air bubble intrusion, reducing the need for separate components
Solution Approach 2:
The photosensitive gap material barrier is prepared in advance with pre-formed through-holes before the liquid crystal assembly process. This preliminary preparation ensures that the barrier is ready to immediately block air bubbles during assembly without requiring additional real-time adjustments or complex mechanisms
3Productivity
If photosensitive gap material barrier is used to prevent air bubble spread, then product yield rate is improved, but manufacturing process complexity increases
Solution Approach 1:
The photosensitive gap material barrier replaces complex mechanical air bubble removal systems with a passive structural barrier. Instead of requiring active mechanical intervention to remove or redirect air bubbles, the barrier's through-holes and photosensitive material properties automatically control liquid crystal flow and block air bubbles through its designed geometry
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
Effectively blocks or collects air bubbles, enhancing displaying quality and increasing product yield without additional manufacturing processes.
Implementation Method 1
a photosensitive gap material barrier arranged between the array substrate and the CF substrate. The photosensitive gap material barrier is arranged to circumferentially surround an outer periphery of a display zone of the liquid crystal display panel... so as to block or collect the air bubbles therein to prevent the air bubbles from spreading into the display zone
Data Source
AI summary
A liquid crystal display panel includes an array substrate (1), a CF substrate (2) arranged to correspond to the array substrate (1), liquid crystal filled between the array substrate (1) and the CF substrate (2), enclosing resin (3) coated between the array substrate (1) and the CF substrate (2), and a photosensitive gap material barrier (4) arranged between the array substrate (1) and the CF substrate (2). The photosensitive gap material barrier (4) is arranged to circumferentially surround an outer periphery of a display zone (6) of the liquid crystal display panel. The photosensitive gap material barrier (4) has a height that is less than a distance between the array substrate (1) and the CF substrate (2). The photosensitive gap material barrier (4) includes a plurality of recessed cavities (41) formed therein. The liquid crystal display panel prevents air bubbles of the outer periphery of the display zone from spreading into the display zone to cause abnormal displaying and enhances the displaying quality of the liquid crystal display panel and improves product yield rate.