Liquid crystal display device with spacers integrally formed at plastic substrate

• US 6,801,290 B2
• Filed: 12/30/2002
• Issued: 10/05/2004
• Est. Priority Date: 02/07/2002
• Status: Expired due to Term

• Current Assignee: BOE HYDIS Technology Company Limited (SK Hynix Inc.)
• Original Assignee: BOE HYDIS Technology Company Limited (SK Hynix Inc.)
• Inventors: Lee, Seung Hee, Kim, Hyang Yul, Kim, Jin Mahn
• Primary Examiner(s): Chowdhury, Tarifur R.
• Assistant Examiner(s): SCHECHTER, ANDREW M
• Application Number:
  US10/331,967
• Publication Number:
  US 20030151715A1
• Time in Patent Office: 645 Days
• Field of Search: 349/155, 349/156, 349/158, 349/160
• US Class Current: 349/156
• CPC Class Codes: G02F 1/133305 Flexible substrates, e.g. plastics, organic film
• CPC Class Codes: G02F 1/13394 spacers regularly patterned on the cell subtrate, e.g. walls, pillars G02F1/133377 takes precedence

Abstract

A liquid crystal display device with spacers integrally formed at a plastic substrate. The liquid crystal display device comprises: upper and lower substrates joined with liquid crystals interposed there-between, at least one substrate of which is made of plastic; a driving electrode for the liquid crystals formed at the lower substrate; polarizers attached at respective rear surfaces of the upper and lower substrates; and spacers interposed between the upper and lower substrates to maintain cell gaps, wherein the spacers are integrally formed at the substrate, and concurrently act as posts. Also, spacers can be integrally formed at either one of the lower plastic substrate and the upper plastic substrate, or the spacers can be integrally formed at both the lower plastic substrate and the upper plastic substrate, and the spacers have a height of “cell gap±a”, wherein the cell gap is 0.2 to 10 μm and “a” is not more than 1 μm.

Claims

1. A liquid crystal display device having upper and lower substrates with a plurality of supporting posts integrally formed at both substrates, the liquid crystal display device comprising:

liquid crystals interposed between the upper and lower substrates made of plastic and separated at a cell gap;

a driving electrode for the liquid crystals formed at the lower substrate;

polarizers attached at respective rear surfaces of the upper and lower substrates; and

the plurality of posts interposed between the upper and lower substrates,

wherein a predetermined number of the posts are integrally formed at the upper substrate and the remainder of the posts are integrally formed at the lower substrate.

2. The liquid crystal display device of claim 1, wherein the height of each post is between 3 and about 11 μ

m to maintain the predetermined distance between the upper and lower substrates.

3. The liquid crystal display device of claim 1, wherein the posts are formed to correspond to the locations of gate bus lines or pixel bus lines or