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New Post Spacer Structure Against Finger Force

IP.com Disclosure Number: IPCOM000015456D
Original Publication Date: 2002-Mar-29
Included in the Prior Art Database: 2003-Jun-20
Document File: 2 page(s) / 63K

Publishing Venue

IBM

Abstract

Problem Solved The post spacer is now popular for TFT/LCD·panels for creating cell gap. But when the post spacer is used, the following two problems are obvious. 1. Bubble at low temperature 2. Gap defect by finger press

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New Post Spacer Structure Against Finger Force

Problem Solved

The post spacer is now popular for TFT/LCD·panels for creating cell gap. But when the post spacer is used, the following two problems are obvious.
1. Bubble at low temperature
2. Gap defect by finger press

"The bubble at low temperature" happens as follows. -When the temperature is low, the LC shrinks but the post spaces do not shrink as same as LC. -This means the LC pressure get low.
-It causes "the bubble at low temperature". In order to circumvent this, the low post density(or weak post) is preferable.

"The gap defect by finger press" happens as follows. -A person press the surface of panel by finger strongly -It cause the fixed deformation of posts. -It causes the gap defect. In order to circumvent this, the high post density(strong post) is preferable.

The requirements for the above are contradicted. In order to crate the post which is high density when the finger press happen and which is low density when the low temperature happen, the following structures is invented.

The advantage of this invention

By using the height of thin films of array, the gap space between assistant post and substrate are created. In the ordinary environment, the cell gap is created by main posts only. The main posts density is designed as low enough to circumvent "bubble at low temperature". When the finger press happen, the assistant posts help main posts. The assistant posts are designed as high enough to circumvent...