LCD Peripheral Wiring Openings for UV Curing
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Solution Overview
Problem
The existing liquid crystal display devices face issues with insufficient curing of the sealing layer due to UV ray obstruction by peripheral wirings, leading to reduced durability against external forces like sliding and pressure, and increased wiring resistance, which can result in defects such as minute bright spots and display quality issues.
Innovation Solution
The implementation of a liquid crystal display device design with strategically positioned openings in the wiring and sealing layer, where the opening ratio is higher in areas adjacent to the display region to enhance UV ray transmission for effective curing of the sealing layer, while maintaining a lower opening ratio in areas outside the display region to minimize wiring resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wirings are provided on the peripheral portion of the TFT substrate to shut off UV rays, then curing of the sealing layer is improved, but wiring resistance increases
Solution Approach 1:
The patent applies local quality by creating openings only in specific regions where the wiring overlaps with the sealing layer. The openings are strategically positioned to allow UV ray transmission precisely where needed for curing, while maintaining continuous wiring in other areas to preserve electrical conductivity. This localized modification resolves the contradiction by making the wiring structure non-uniform - opaque where electrical function is needed, transparent where curing function is needed.
2Reliability
If opening ratio of wiring is increased to improve UV ray transmission, then curing of sealing layer is improved, but wiring resistance increases
Solution Approach 1:
The patent limits the opening ratio to specific regions where wiring and sealing layer overlap, rather than increasing openings uniformly across the entire wiring. This localized approach ensures sufficient UV transmission for curing in critical areas while maintaining adequate wiring continuity elsewhere to minimize resistance and energy loss.
Solution Approach 2:
The patent applies partial action by providing openings only in the portions of wiring that overlap with the sealing layer, rather than opening the entire wiring structure. This partial modification is sufficient to enable UV transmission where needed while preserving wiring integrity and minimizing resistance increase.
3Area of stationary object
If wirings and sealing layer are disposed to pile up on each other to narrow frame, then device size is reduced, but UV ray transmission is blocked
Solution Approach 1:
The patent maintains the piled-up configuration of wirings and sealing layer to achieve narrow frame width, but introduces local openings in the wiring only where it overlaps with the sealing layer. This localized transparency restoration allows UV rays to pass through to cure the sealing layer in the ODF region, while maintaining the compact piled-up structure elsewhere for miniaturization.
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 approach ensures sufficient durability against external forces and prevents alignment film cuts, while keeping wiring resistance minimal by promoting thorough curing of the sealing layer and optimizing UV ray transmission.
Implementation Method 1
a sealing layer, including a UV ray curable resin therein, and being formed on peripheral regions of the both substrate
Implementation Method 2
openings formed in a region where the wiring and the sealing layer are put on each other
Data Source
AI summary
A liquid crystal display device comprises a TFT substrate, forming a wiring made of a material shutting off UV rays on a peripheral region thereof, and a sealing layer, including a UV ray curable resin therein, and being formed on peripheral regions of the substrate, to enclose the liquid crystal layer. The wiring and the sealing layer formed on the peripheral region are so provided that they are put on each other, at least in part thereof, on the wiring are provided plural numbers of opening portions formed in region where the wiring and the sealing layer are put on each other, and the opening portions are divided into a first area beside a display region and a second area outside the first area, and an opening ratio of the opening portions of the first area is larger than the opening ratio of the opening portions of the second area.