Flat Panel Display Sealant Thickness Compensation
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Solution Overview
Problem
In flat panel displays like LCDs and OLEDs, the application of sealants using methods like dispenser printing often results in non-uniform thickness patterns due to varying pressures, leading to thickness differences between sealants, which can cause stress and affect the uniformity of the interval between substrates, thereby compromising the sealing efficiency and instrument intensity.
Innovation Solution
The implementation of a flat panel display design that includes a sealant with interconnected sealing parts and compensating parts on the substrates, where the compensating parts are protrusions or grooves matching the thickness differences of the sealant parts, ensuring a uniform interval between substrates and enhancing sealing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sealant is applied using dispenser printing method with predetermined pressure, then sealant application efficiency is improved, but thickness uniformity deteriorates
Solution Approach 1:
The patent introduces compensating parts with different thicknesses at different locations on the substrate to match the non-uniform sealant thickness. The compensating parts have varying thickness values corresponding to different sealant thickness regions, ensuring uniform overall thickness while maintaining efficient dispensing application.
Solution Approach 2:
The patent changes the thickness parameter of compensating parts to compensate for sealant thickness variations. By adjusting the compensating part thickness at different locations, the overall uniformity is achieved without changing the sealant application process parameters.
2Ease of manufacture
If sealant thickness varies, then application process simplicity is improved, but substrate stress increases
Solution Approach 1:
The compensating parts are designed with location-specific thickness variations that correspond to the sealant thickness profile. This local compensation approach maintains simple dispensing application while reducing substrate stress by ensuring uniform total thickness across different regions.
3Device complexity
If sealant thickness is non-uniform, then manufacturing complexity is reduced, but interval uniformity between substrates deteriorates
Solution Approach 1:
The compensating parts introduce local thickness variations that precisely match the sealant thickness profile. This maintains simple manufacturing processes while achieving uniform interval between substrates through location-specific compensation.
Solution Approach 2:
The compensating parts are pre-formed on the substrate before sealant application to counteract the expected non-uniformity. This preliminary compensation ensures uniform final thickness and interval uniformity without complicating the sealant application process.
Data Source
AI summary
A flat panel display including a first substrate, a second substrate, a light emitting region between the first and second substrates, and a sealant applied outside of the light emitting region, wherein the sealant has a rectangular shape and includes a first sealing part and a third sealing part opposite each other, and a second sealing part and a fourth sealing part opposite each other, the first, second, third, and fourth sealing parts being interconnected, and wherein the flat panel display includes a compensating part corresponding to at least one of the first, second, third, and fourth sealing parts on or in the first or second substrate.