Ultra-thin backlight for LCD displays through use of field-induced polymer electro luminescence panels including integrated light guide

• US 9,110,331 B2
• Filed: 03/13/2013
• Issued: 08/18/2015
• Est. Priority Date: 03/13/2013
• Status: Active Grant

• Current Assignee: VIZIO, Inc.
• Original Assignee: VIZIO, Inc.
• Inventors: McRae, Matthew
• Primary Examiner(s): BRUCE, DAVID VERNON
• Application Number:
  US13/800,064
• Publication Number:
  US 20140267938A1
• Time in Patent Office: 888 Days
• US Class Current: 1/1
• CPC Class Codes: B82Y 20/00 Nanooptics, e.g. quantum optics or photonic crystals
• CPC Class Codes: G02B 6/0001 specially adapted for lighting devices or systems lighting or signalling on vehicles using light guides B60Q1/00; lighting devices for vehicle dashboards B60Q3/10; lighting devices for vehicle interior using light guides B60Q3/62; lighting devices mounted on the vehicle rear part using light guides F21S43/235; measuring arrangements having light conducting pointers G01D13/265; illumination of liquid crystal displays G02F1/1336; illuminated signs G09F13/00
• CPC Class Codes: G02B 6/0036 2-D arrangement of prisms, protrusions, indentations or roughened surfaces
• CPC Class Codes: G02B 6/0043 provided on the surface of the light guide
• CPC Class Codes: G02F 1/133603 with LEDs
• CPC Class Codes: G02F 1/133605 including specially adapted reflectors
• CPC Class Codes: G02F 1/133606 including a specially adapted diffusing, scattering or light controlling members
• CPC Class Codes: G02F 1/133612 Electrical details
• CPC Class Codes: G02F 2202/022 polymeric
• CPC Class Codes: G02F 2202/36 Micro- or nanomaterials
• CPC Class Codes: G09F 13/04 Signs, boards or panels, illuminated from behind the insignia
• CPC Class Codes: H10K 2101/10 Triplet emission
• CPC Class Codes: H10K 2101/90 Multiple hosts in the emissive layer
• CPC Class Codes: H10K 50/00 Organic light-emitting devices integrated devices or assemblies of multiple devices H10K59/00, H10K65/00; organic semiconductor lasers H01S5/36
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 59/00 Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
• CPC Class Codes: H10K 85/146 poly N-vinylcarbazol; Derivatives thereof
• CPC Class Codes: H10K 85/221 Carbon nanotubes
• CPC Class Codes: H10K 85/342 comprising iridium

Abstract

A display system, having an emissive body, emitting light over a complete surface as part of a display system. The emissive body can be a FIPEL type device with a first transparent conductive coating over a light emitting substrate. A transparent substrate, has first and second surfaces, with the first surface coupled to the first transparent conductive coating, and the second surface of the transparent substrate including a surface formed with plural light channeling structures thereon.

Claims

1. A display system, comprising

an emissive body, emitting light over a complete surface as part of a display system, said emissive body including a first transparent conductive coating over a light emitting substrate, and including a transparent substrate, having first and second surfaces, said first surface coupled to said first transparent conductive coating, and said second surface of said transparent substrate including a surface formed with plural light channeling structures thereon.

2. The display system as in claim 1, wherein said emissive body emits light from both front and back.

3. The display system as in claim 1, wherein said light channeling structures comprise an array of prisms.

4. The display system as in claim 1, wherein said light channeling structures comprise an array of micro-lenses.

5. The display system as in claim 1, further comprising a spatial light modulator, located to receive the light from said second surface of said transparent substrate.

6. The display system as in claim 5, wherein said spatial light modulator is liquid crystal, forming a liquid crystal display.

7. The display system as in claim 6, wherein the display system is a television.

8. This display system as in claim 6 wherein the display system is in a portable computer.

9. The display system as in claim 8, wherein said portable computer is one of a tablet, cell phone, or PDA.

10. The display system as in claim 6 wherein said spatial light modulator is composed of elements that are one of:

TFT, VA, IPS, IGZO.

11. A method of forming light, comprising

emitting light over a complete surface as part of a display system, using a device with an emissive body including a first transparent conductive coating over a light emitting material having first and second surfaces;

and

channeling the emitted light using a shaped surface on a transparent substrate attached to said first transparent coating, where the shaped surface includes plural light channeling structures thereon.

12. The method as in claim 11, wherein said emitting light comprises emitting light from both front and back of the surface.

13. The method as in claim 11, wherein said light channeling structures comprise an array of prisms.

14. The method as in claim 11, wherein said light channeling structures comprise an array of micro-lenses.

15. The method as in claim 11, further comprising creating a display using a spatial light modulator, located to receive the light from said second surface of said transparent substrate.

16. The method as in claim 15, wherein said spatial light modulator is liquid crystal, forming a liquid crystal display.

17. The method as in claim 15, wherein the display is in a television.

18. This method as in claim 15 wherein the display is in a portable computer.

19. The method as in claim 18, wherein said portable computer is one of a tablet, cell phone, or PDA.

20. The method as in claim 16 wherein said spatial light modulator is composed of elements that are one of:

TFT, VA, IPS, IGZO.

21. A display system, comprising

an emissive body, emitting light over a complete surface as part of a display system, said emissive body including a light emitting material, a first transparent conductive coating over light emitting material, a transparent substrate, having a first surface attached to said first conductive coating and a second surface formed with plural light channeling structures thereon;

and

a spatial light modulator, adjacent said emissive body and receiving light from said light channeling structures, over a surface of the spatial light modulator.

22. The display system as in claim 21, wherein said emissive body emits light from both front and back.

23. The display system as in claim 21, wherein said light channeling structures comprise an array of prisms.

24. The display system as in claim 21, wherein said light channeling structures comprise an array of micro-lenses.

25. The display system as in claim 21, wherein said spatial light modulator is a liquid crystal device.