Method of fabricating a liquid crystal display

• US RE36,711 E
• Filed: 11/18/1998
• Issued: 05/23/2000
• Est. Priority Date: 06/01/1992
• Status: Expired due to Term

• Current Assignee: Advanced Technology Incubator Incorporated
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Yaniv, Zvi
• Primary Examiner(s): PIANALTO, BERNARD D
• Application Number:
  US09/195,076
• Time in Patent Office: 552 Days
• Field of Search: 156/99, 156/108, 156/145, 156/310, 427/165, 427/169, 427/269, 427/270, 427/272, 427/289, 427/389.7, 427/393.5, 427/512, 427/514, 427/521, 427/555, 427/557, 427/595, 427/596, 427/510
• US Class Current: 427/510
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G02F 1/133516 Methods for their manufacture, e.g. printing, electro-deposition or photolithography

Abstract

A light influencing element and the process of fabricating the same is disclosed, wherein the light influencing element is fabricated by disposing a layer of a substantially opaque material upon a transparent substrate. One or more openings or wells may then be cut or formed in the surface of the layer of opaque material. Into such openings a light influencing material is then disposed, preferable said materials are injected thereinto as by ink-jet type injection heads. Liquid crystal displays and subassemblies formed upon the light influencing elements of the instant invention are also provided.

Claims

1. A method of fabricating a liquid crystal display subassembly, said method comprising the steps of:

providing a substantially transparent substrate member;

disposing a layer of substantially opaque material upon one side of said substrate, said substantially opaque material being a black polyimide material;

forming at least one opening through said layer of substantially opaque material;

disposing a light influencing material in said at least one opening;

disposing a continuous layer of a transparent, passivating material atop said layer of opaque material and said light influencing material; and

disposing a layer of transparent, conductive material atop said passivating layer.

2. A method as in claim 1, wherein the step of providing a substantially transparent substrate member includes the further step of selecting said member from the group of materials consisting of glass, plastic, and combinations thereof.

3. A method as in claim 1, wherein the step of disposing a layer of substantially opaque material upon said substrate includes the further step of disposing said material to a thickness of between 0.10 and 100.0 μ

m.

4. A method as in claim 3, wherein the opaque material is disposed to a thickness of between 1.0 and 10.0 μ

m.

5. A method as in claim 1, wherein the step of forming at least one opening through said layer of substantially opaque material is accomplished by employing a method selected from the group of a high power laser, a photolithographic etch process, and combinations thereof.

6. A method as in claim 5, wherein the step of forming at least one opening includes the further steps of:

providing a high power excimer laser capable of at least micron scale resolution;

placing said substrate with said layer of opaque material in close proximity to said laser;

providing means for achieving relative movement between said laser and said substrate; and

employing said laser to cut at least one opening in said layer of opaque material.

7. A method as in claim 1, wherein the step of forming at least one opening includes the further step of forming a plurality of similarly sized and shaped openings, arranged in a densely packed, uniformly spaced array.

8. A method as in claim 1, wherein the step of disposing a light influencing material into said at least one opening includes the further steps of:

providing a light influencing material in a non-solid phase having the optical characteristics thereof optimized for a desired application;

injecting a sufficient amount of said light influencing material into said openings so as to achieve a desired light influencing effect; and

curing said non-solid light influencing material to the solid phase.

9. A method as in claim 8, wherein the step of injecting light influencing material into said openings includes the further steps of:

providing at least one nozzle for injecting said materials, in close proximity to one of said openings;

providing means for achieving relative movement between said nozzle and said opaque material coated substrate, for disposing light influencing material into preselected ones of said openings.

10. A method as in claim 9, wherein the step of curing said light influencing material includes the further steps of:

providing infrared oven means; and

disposing said substrate, layer of opaque material, and light influencing material into said oven means so as to solidify said light influencing material.

11. A method as in claim 1, including the further step of selecting a light influencing material adapted Lo color white light.

12. A method as in claim 11, wherein said light influencing material is adapted to color light into the group of colors consisting of red, green, blue, and combinations thereof.

13. A method of fabricating a liquid crystal display, said method comprising the steps of:

providing a substantially transparent first substrate member;

disposing a layer of substantially opaque material upon one side of said first substrate;

forming at least one opening through said layer of substantially opaque material;

disposing a light influencing material in said at least one opening;

disposing a continuous layer of a transparent, passivating material atop said layer of opaque material and said light influencing material;

disposing a layer of transparent, conductive material atop said passivating layer;

providing a second substantially transparent substrate member having a continuous layer of a transparent conductive material disposed on one surface thereof, said second substrate being spacedly disposed from said first substrate and arranged so that the layer of transparent conductive material of the second substrate faces the layer of transparent conductive material of the first substrate; and

disposing a layer of liquid crystal material between said first and said second substrates. .Iadd.

14. A method of fabricating a liquid crystal display, said method comprising the steps of:

providing a substantially transparent first substrate member;

disposing a layer of substantially opaque material upon one side of said first substrate;

forming at least three openings through said layer of substantially opaque material;

injecting a light influencing material including first, second, and third colors in said at least three openings directly on the first substrate the first, second and third colors being injected substantially simultaneously in the three openings, respectively;

disposing a continuous layer of transparent, passivation material atop said layer of opaque material and said light influencing material, the continuous layer of transparent, passivation material providing a substantially flat, level surface;

disposing a layer of transparent, conductive material atop said substantially flat, level surface of the passivation layer;

providing a second substantially transparent substrate member having a continuous layer of a transparent conductive material disposed on one surface thereof, said second substrate being spacedly disposed from said first substrate and arranged so that the layer of transparent conductive material of the second substrate faces the layer of transparent conductive material of the first substrate; and

disposing a layer of liquid crystal material between said first and second substrates. .Iaddend..Iadd.15. The method according to claim 14, wherein at least one of the first and second transparent substrates includes a

15. plastic material. .Iaddend..Iadd.16. The method according to claim 14, wherein the openings are formed without using a photolithography process. .Iaddend..Iadd.17. The method according to claim 14, wherein the openings are optically formed. .Iaddend..Iadd.18. The method according to claim 14, further including the step of selecting a light influencing material adapted to color white light. .Iaddend..Iadd.19. The method according to claim 18, wherein said light influencing material is adapted to color light into the group of colors consisting of red, green, blue, and combinations thereof. .Iaddend..Iadd.20. A method of fabricating a liquid crystal display, said method comprising the steps of:

providing a substantially transparent first substrate member;

disposing a layer of substantially opaque material upon one side of said first substrate;

forming an opening through said layer of substantially opaque material, the opening having a first depth;

injecting a light influencing material in said opening directly on the first substrate, the light influencing material filling the opening to a level less than the first depth so as to prevent any spill over of the light influencing material;

disposing a continuous layer of transparent, passivation material atop said layer of opaque material and said light influencing material, the continuous layer of transparent, passivation material providing a substantially flat, level surface;

disposing a layer of transparent, conductive material atop said substantially flat, level surface of the passivation layer;

providing a second substantially transparent substrate member having a continuous layer of a transparent conductive material disposed on one surface thereof, said second substrate being spacedly disposed from said first substrate and arranged so that the layer of transparent conductive material of the second substrate faces the layer of transparent conductive material of the first substrate; and

disposing a layer of liquid crystal material between said first and second substrates. .Iaddend..Iadd.21. The method according to claim 20, wherein at least one of the first and second transparent substrates includes a plastic material. .Iaddend..Iadd.22. The method according to claim 20, wherein the openings are formed without using a photolithography process. .Iaddend..Iadd.23. The method according to claim 20, wherein the openings are optically formed. .Iaddend..Iadd.24. The method according to claim 20, further including the step of selecting a light influencing material adapted to color white light. .Iaddend..Iadd.25. The method according to claim 24, wherein said light influencing material is adapted to color light into the group of colors consisting of red, green, blue, and combinations thereof. .Iaddend..Iadd.26. A method of fabricating a liquid crystal display said method comprising the steps of;

providing a substantially transparent first substrate member;

disposing a layer of substantially opaque material upon one side of said first substrate;

forming an opening through said layer of substantially opaque material;

injecting a light influencing material in said opening;

disposing a layer of transparent conductive material over said light influencing material;

providing a second substantially transparent substrate member having a continuous layer of a transparent conductive material disposed on one surface thereof, said second substrate being spacedly disposed from said first substrate and arranged so that the layer of transparent conductive material of the second substrate faces the layer of transparent conductive material of the first substrate; and

disposing a layer of liquid crystal material between said first and second substrates;

wherein the method does not use a photolithography process to form the opening in the light influencing material. .Iaddend..Iadd.27. The method according to claim 26, wherein at least one of the first and second

16. transparent substrates includes a plastic material. .Iaddend..Iadd.28. The method according to claim 26, wherein the openings are optically formed. .Iaddend..Iadd.29. The method according to claim 26, wherein the light influencing material fills the opening to a level less than a depth of the opening so as to prevent any spill over of the light influencing material. .Iaddend..Iadd.30. The method according to claim 26, further including the step of selecting a light influencing material adapted to color white light. .Iaddend..Iadd.31. The method according to claim 30, wherein said light influencing material is adapted to color light into the group of colors consisting of red, green, blue, and combinations thereof. .Iaddend..Iadd.32. A method of fabricating a liquid crystal display, said method comprising the steps of:

providing a substantially transparent first substrate member;

disposing a layer of substantially opaque material upon one side of said first substrate;

forming at least three openings through said layer of substantially opaque material;

injecting a light influencing material including first, second, and third colors in said at least three openings directly on the first substrate;

disposing a continuous layer of transparent, passivation material atop said layer of opaque material and said light influencing material, the continuous layer of transparent, passivation material providing a substantially flat, level surface; and

disposing a layer of transparent, conductive material atop said substantially flat, level surface of the passivation layer. .Iaddend..Iadd.33. The method according to claim 32, wherein the openings are formed without using a photolithography process. .Iaddend..Iadd.34. The method according to claim 32, wherein the openings are optically formed. .Iaddend..Iadd.35. The method according to claim 32, wherein the light influencing material fills the opening to a level less than a depth of the opening so as to prevent any spill over of the light influencing material. .Iaddend..Iadd.36. The method according to claim 32, further including the step of selecting a light influencing material adapted to color white light. .Iaddend..Iadd.37. The method according to claim 36, wherein said light influencing material is adapted to color light into the group of colors consisting of red, green, blue, and combinations thereof. .Iaddend.