Liquid crystal display device and manufacturing method thereof

• US 20050270468A1
• Filed: 04/27/2005
• Published: 12/08/2005
• Est. Priority Date: 05/31/2004
• Status: Abandoned Application

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Choi, Tae-Young, Kim, Sang-Il
• Application Number:
  US11/115,730
• Publication Number:
  US 20050270468A1
• Time in Patent Office: Days
• US Class Current: 349/155
• CPC Class Codes: G02F 1/1334 based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
• CPC Class Codes: G02F 1/133528 Polarisers
• CPC Class Codes: G02F 1/13392 spacers dispersed on the cell substrate, e.g. spherical particles, microfibres

Abstract

A display panel for a liquid crystal display device comprises two substrates facing each other and having a gap therebetween, electrodes to establish an electric field in a space between the two substrates, spacers disposed between the two substrates to allow the two substrates to have the gap therebetween, and a liquid crystal layer disposed between the two substrates. The display panel further comprises a polarizer disposed on an outer surface of each substrate, and another spacers disposed between the substrate and the polarizer to provide a uniform gap therebetween. The spacers are each coated with a polymerization initiator before being disposed between the substrates or between the substrate and the polarizer so that polymer is formed around the spacers.

Claims

1. A display device for displaying images, comprising:

two substrates facing each other and having a predetermined gap therebetween;

field-generating electrodes forming an electric field between the two substrates;

first spacers disposed between the two substrates to allow the two substrates to have the predetermined gap therebetween;

a liquid crystal layer disposed between the two substrates;

a polarizer disposed on an outer surface of at least one of the two substrates; and

second spacers disposed between the polarizer and the at least one of the two substrates to allow the polarizer and the at least one of the two substrates to have a uniform gap therebetween.

2. The display device of claim 1, wherein the first and the second spacers are spherical.

3. The display device of claim 1, wherein the first and second spacers have a column shape.

4. The display device of claim 1, wherein the first and the second spacers have elasticity.

5. The display device of claim 1, wherein the first and second spacers are made of material including plastic.

6. The display device of claim 1, wherein the first and second spacers comprise particles having one of nanoporous surface, mesoporous surface and microporous surface.

7. The display device of claim 1, further comprising a first polymer disposed around the first spacers between the two substrates, the first polymer providing adhesion between the two substrates.

8. The display device of claim 1, further comprising a second polymer disposed around the second spacers between the polarizer and the at least one of the two substrates, the second polymer providing adhesion between the polarizer and the at least one of the two substrates.

9. The display device of claim 1, further comprising a medium disposed between the polarizer and the at least one of the two substrates.

10. The display device of claim 9, further comprising a sealant to seal surrounding regions of a space between the polarizer and the at least one of the two substrates, wherein the second spacers, the second polymer and the medium are contained in the space.

11. A method of manufacturing a display panel of an image display device, comprising:

providing two substrates having field-generating electrodes to form an electric field between the two substrates;

coating spacers with initiator material that initiates polymerization reaction;

disposing the spacers between the two substrates;

disposing liquid crystal and pre-polymer mixture between the two substrates; and

laminating the two substrates together, the two substrates having a gap therebetween by means of the spacers.

12. The method of claim 11, wherein the providing the two substrates includes:

providing two panel substrates having flexible polymer material;

forming a conductor layer on each of the two panel substrates; and

forming a polyimide alignment layer on the conductor layer, wherein the spacers and the liquid crystal and pre-polymer mixture are disposed between polyimide alignment layers of the two substrates.

13. The method of claim 12, further including forming a polarizer on an outer surface of at least one of the two panel substrates.

14. The method of claim 11, further including exposing the laminated substrates to ultraviolet light when the initiator material includes photoinitiator.

15. The method of claim 11, wherein the coating the spacers with the initiator material includes adding accelerant in the initiator material.

16. The method of claim 15, wherein the accelerant is accelerator lacquer initiator.

17. The method of claim 11, wherein the disposing the liquid crystal and pre-polymer mixture includes adding polymer initiation or enhancement (PIE) elements to activate a polymerization reaction.

18. The method of claim 11, wherein the coating the spacers with the initiator material includes adding silane to the initiator material.

19. The method of claim 11, wherein the disposing the liquid crystal and pre-polymer mixture includes adding acrylic adhesives to the liquid crystal and pre-polymer mixture.

20. The method of claim 11, wherein the disposing the liquid crystal and pre-polymer mixture includes modifying the pre-polymer to remove photoinitiator from the pre-polymer.