Browse Prior Art Database

Liquid Crystal Display

IP.com Disclosure Number: IPCOM000037168D
Original Publication Date: 1989-Nov-01
Included in the Prior Art Database: 2005-Jan-29
Document File: 2 page(s) / 40K

Publishing Venue

IBM

Related People

Ikeda, A: AUTHOR [+3]

Abstract

Disclosed is a liquid crystal display which does not have any spacer on a display electrode. If a spacer which consists of plastic or glass exists on a display electrode, a Reverse-Twist domain and/or Reverse -Tilt domain is induced into a pixel area by the spacer. Therefore, linearly polarized light cannot be rotated at the portion, and light leakage occurs at dark-state. Thus, contrast ratio is deteriorated. Although a spacer has a significant role of uniform cell gap control across the large area substrate in the liquid crystal display, the spacer should not exist on the display electrode from the reasons described above.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 2

Liquid Crystal Display

Disclosed is a liquid crystal display which does not have any spacer on a display electrode. If a spacer which consists of plastic or glass exists on a display electrode, a Reverse-Twist domain and/or Reverse -Tilt domain is induced into a pixel area by the spacer. Therefore, linearly polarized light cannot be rotated at the portion, and light leakage occurs at dark-state. Thus, contrast ratio is deteriorated. Although a spacer has a significant role of uniform cell gap control across the large area substrate in the liquid crystal display, the spacer should not exist on the display electrode from the reasons described above.

The figure is a cross-sectional view of the disclosed liquid crystal display. As seen from this figure, a spacer is fabricated at only a black matrix portion. The black matrix is fabricated by using black dye/pigment-dispersed photo-polymers. The spacers are dispersed in a photo-polymer solution and are coated on a substrate. The black matrix including spacers can be obtained by exposing the photo-polymer layer including spacer through a photo-mask and developing.

1

Page 2 of 2

2

[This page contains 3 pictures or other non-text objects]