Liquid Crystal Display Panel Continuous Weir Sealing Design
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Solution Overview
Problem
Miniaturized liquid crystal display devices face challenges in sealing due to the interference between dripped liquid crystal and uncured sealing material, leading to leak paths and reduced effective sealing widths, which are difficult to adjust and result in sealing failures.
Innovation Solution
A liquid crystal display panel design featuring a continuous weir surrounding the display region on one substrate, with spacers controlling the gap between substrates, and a manufacturing method that includes forming weirs and spacers without increasing manufacturing steps, using a sealing material that covers the weirs, and curing in a reduced-pressure atmosphere to prevent liquid crystal intrusion and air pushing-in.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If liquid crystal is dripped onto one substrate and then sealed with sealing material, then liquid crystal filling is achieved, but liquid crystal interferes with the sealing material causing intrusion and sealing failure
Solution Approach 1:
The sealing structure is segmented into multiple components: a first sealing material applied to the peripheral portion of the first substrate, and a second sealing material applied to the peripheral portion of the second substrate. This segmentation prevents liquid crystal from directly contacting and interfering with a single continuous sealing material, thereby resolving the contradiction between filling efficiency and sealing reliability.
Solution Approach 2:
The first and second sealing materials act as intermediary barriers between the liquid crystal and the substrate periphery. By placing these sealing materials on opposite substrates before assembly, they prevent direct intrusion of liquid crystal into the sealing region, maintaining both efficient filling and reliable sealing.
2Length of stationary object
If liquid crystal intrudes into the sealing material, then sealing width is reduced, but sealing effectiveness is compromised
Solution Approach 1:
The first sealing material is applied to the first substrate and the second sealing material is applied to the second substrate before the substrates are assembled. This preliminary action ensures that the sealing materials are already in place to prevent liquid crystal intrusion, maintaining the full sealing width and effectiveness without compromise.
3Reliability
If air enters the sealing material during sealing, then sealing quality deteriorates, but manufacturing complexity increases
Solution Approach 1:
The sealing process is performed in a reduced-pressure atmosphere, creating an inert environment that prevents air from entering the sealing material during assembly. This simple atmospheric control measure improves sealing quality without significantly increasing process 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
This solution effectively prevents sealing failures and maintains reliable sealing performance across various display sizes by enhancing the adhesiveness between the sealing material and substrates, ensuring consistent and efficient liquid crystal filling.
Implementation Method 1
sealing one substrate to another substrate using a sealing material
Implementation Method 2
curing in a reduced-pressure atmosphere to prevent liquid crystal intrusion and air pushing-in
Data Source
AI summary
The present invention provides a liquid crystal display panel which can prevent a leak path of a sealing material when liquid crystal is brought into contact with an uncured sealing material in a sealing step and a manufacturing method thereof. In a liquid crystal display panel which forms a display region by providing liquid crystal in a gap defined between one substrate and another substrate, a weir which is continuously formed so as to surround the display region and a sealing material which is arranged to cover the weir are arranged on a surface of one substrate.