Contrast enhancement films for direct-view displays and fabrication methods therefor

• US 7,502,169 B2
• Filed: 02/28/2006
• Issued: 03/10/2009
• Est. Priority Date: 12/07/2005
• Status: Expired due to Fees

• Current Assignee: Bright View Technologies Corporation (Tredegar Corporation)
• Original Assignee: Bright View Technologies, Inc. (Tredegar Corporation)
• Inventors: Wood, Robert L.
• Primary Examiner(s): SCHWARTZ, JORDAN MARC
• Application Number:
  US11/364,423
• Publication Number:
  US 20070127098A1
• Time in Patent Office: 1,106 Days
• Field of Search: 359/738, 359/619, 359/621, 359/627
• US Class Current: 359/619
• CPC Class Codes: G02B 3/0031 Replication or moulding, e.g. hot embossing, UV-casting, injection moulding
• CPC Class Codes: G02B 3/005 arranged along a single direction only, e.g. lenticular sheets G02B3/0043 takes precedence
• CPC Class Codes: G02B 3/0068 arranged in a single integral body or plate, e.g. laminates or hybrid structures with other optical elements G02B5/1885, G02B17/002, G02B30/27 take precedence
• CPC Class Codes: G02B 5/005 Diaphragms for cameras G03B9/02
• CPC Class Codes: G02F 1/133334 Electromagnetic shields
• CPC Class Codes: G02F 1/133507 Films for enhancing the luminance
• CPC Class Codes: G02F 2201/08 light absorbing layer
• CPC Class Codes: G02F 2203/02 reflective
• CPC Class Codes: H01J 11/10 AC-PDPs with at least one main electrode being out of contact with the plasma
• CPC Class Codes: H01J 11/44 Optical arrangements or shielding arrangements, e.g. filters, black matrices, light reflecting means or electromagnetic shielding means
• CPC Class Codes: H01J 2211/444 Means for improving contrast or colour purity, e.g. black matrix or light shielding means
• CPC Class Codes: H01J 2211/446 Electromagnetic shielding means; Antistatic means
• CPC Class Codes: H01J 2229/8913 Anti-reflection, anti-glare, viewing angle and contrast improving treatments or devices
• CPC Class Codes: H01J 2329/892 Anti-reflection, anti-glare, viewing angle and contrast improving means
• CPC Class Codes: H01J 2329/897 Lenses

Abstract

Contrast enhancement films for a direct-view display include a substrate having first and second opposing sides, an array of optical microstructures on the first side, and an optically blocking film including an array of apertures on the second side. The contrast enhancement film is configured to mount between a direct-view display panel and an outer panel of the direct-view display.

Claims

1. A contrast enhancement film in combination with direct-view display having a direct-view display panel and an outer panel that provides an outer surface for the direct-view display, the contrast enhancement film comprising:

a substrate having first and second opposing sides;

an array of optical microstructures on the first side of the substrate to define a nonplanar surface;

an optically blocking film including an array of apertures therein on the second side of the substrate, wherein the array of apertures are in registry with the array of optical microstructures; and

an adhesive layer on the substrate with the contrast enhancement film mounted on the direct-view display panel between the direct-view display panel and the outer panel.

2. A contrast enhancement film according to claim 1 wherein the array of optical microstructures comprises an array of horizontally extending lenticular microlenses.

3. A contrast enhancement film according to claim 1 wherein the contrast enhancement film further comprises:

a cladding layer on the nonplanar surface of the optical microstructures, the cladding layer including a planar surface opposite the nonplanar surface of the optical microstructures.

4. A contrast enhancement film according to claim 3 wherein the cladding layer has different index of refraction than the optical microstructures.

5. A contrast enhancement film according to claim 1 wherein the optically blocking film comprises a black layer including the array of apertures therein.

6. A contrast enhancement film according to claim 5 wherein the optically blocking film further comprises a reflective layer including the array of apertures therein, on the black layer opposite the substrate.

7. A contrast enhancement film according to claim 1 wherein the array of optical microstructures is an array of first optical microstructures and wherein the contrast enhancement film further comprises a second array of optical microstructures on the optically blocking film, opposite the array of first optical microstructures, to define a nonplanar surface.

8. A contrast enhancement film according to claim 1 wherein the nonplanar surface of the array of optical microstructures includes an adhesive surface that provides the adhesive layer that is configured to mount the contrast enhancement film on the direct view display panel between the direct-view display panel and the outer panel.

9. A contrast enhancement film according to claim 6 wherein the reflective layer comprises conductive material that is configured to suppress electromagnetic interference that is emitted by the direct-view display panel.

10. A contrast enhancement film according to claim 6 wherein the reflective layer comprises conductive material that is configured to carry electric signals that are used to operate the direct-view display panel.

11. A contrast enhancement film according to claim 1 wherein the direct-view display panel is configured to emit Lambertian optical radiation and wherein the contrast enhancement film is configured to convert the Lambertian optical radiation to at least partially collimated radiation.

12. A contrast enhancement film for a direct-view display having a direct-view display panel and an outer panel that provides an outer surface for the direct-view display, the contrast enhancement film comprising:

a substrate having first and second opposing sides;

an array of optical microstructures on the first side of the substrate to define a nonplanar surface;

a black layer including an array of apertures therein on the second side of the substrate;

a reflective layer including the array of apertures therein, on the black layer opposite the substrate;

a cladding layer on the nonplanar surface of the optical microstructures, the cladding layer including a planar surface opposite the nonplanar surface of the optical microstructures; and

an adhesive layer on the reflective layer that is configured to mount the contrast enhancement film on the direct-view display panel between the direct-view display panel and the outer panel.

13. A contrast enhancement film according to claim 12 wherein the array of optical microstructures comprises an array of horizontally extending lenticular microlenses.

14. A contrast enhancement film according to claim 12 wherein the cladding layer has different index of refraction than the optical microstructures.

15. A contrast enhancement film according to claim 12 wherein the reflective layer comprises conductive material that is configured to suppress electromagnetic interference that is emitted by the direct-view display panel.

16. A contrast enhancement film according to claim 12 wherein the reflective layer comprises conductive material that is configured to carry electric signals that are used to operate the direct-view display panel.

17. A contrast enhancement film according to claim 12 wherein the direct-view display panel is configured to emit Lambertian optical radiation and wherein the contrast enhancement film is configured to convert the Lambertian optical radiation to at least partially collimated radiation.

18. A contrast enhancement film according to claim 12 in combination with the direct-view display panel and the outer panel that provides an outer surface for the direct-view display, wherein the adhesive layer is adhesively attached to the direct-view display panel between the direct-view display panel and the outer panel.

19. A contrast enhancement film in combination with direct-view display having a direct-view display panel and an outer panel that provides an outer surface for the direct-view display, the contrast enhancement film comprising:

a substrate having first and second opposing sides;

an array of optical microstructures on the first side of the substrate to define a nonplanar surface;

a black layer including an array of apertures therein on the second side of the substrate; and

an adhesive layer on the black layer with the contrast enhancement film mounted on the direct-view display panel between the direct-view display panel and the outer panel.

20. A contrast enhancement film according to claim 19 further comprising:

a cladding layer on the nonplanar surface of the optical microstructures, the cladding layer including a planar surface opposite the nonplanar surface of the optical microstructures.

21. A contrast enhancement film according to claim 19 wherein the array of optical microstructures comprises an array of horizontally extending lenticular microlenses.

22. A contrast enhancement film according to claim 20 wherein the cladding layer has different index of refraction than the optical microstructures.

23. A contrast enhancement film according to claim 19 wherein the direct-view display panel is configured to emit Lambertian optical radiation and wherein the contrast enhancement film is configured to convert the Lambertian optical radiation to at least partially collimated radiation.

24. A contrast enhancement film for a direct-view display having a direct-view display panel and an outer panel that provides an outer surface for the direct-view display, the contrast enhancement film comprising:

a substrate having first and second opposing sides;

an array of optical microstructures on the first side of the substrate to define a nonplanar surface;

an optically blocking film including an array of apertures therein on the second side of the substrate, wherein the array of apertures are in registry with the array of optical microstructures;

an adhesive layer on the substrate that is configured to mount the contrast enhancement film on the direct-view display panel between the direct-view display panel and the outer panel; and

a bonding substrate on the nonplanar surface of the array of microstructures opposite the substrate;

wherein the adhesive layer is on the bonding substrate.

25. A contrast enhancement film for a direct-view display having a direct-view display panel and an outer panel that provides an outer surface for the direct-view display, the contrast enhancement film comprising:

a substrate having first and second opposing sides;

an array of optical microstructures on the first side of the substrate to define a nonplanar surface;

an optically blocking film including an array of apertures therein on the second side of the substrate, wherein the array of apertures are in registry with the array of optical microstructures;

an adhesive layer on the substrate that is configured to mount the contrast enhancement film on the direct-view display panel between the direct-view display panel and the outer panel;

a cladding layer on the nonplanar surface of the optical microstructures, the cladding layer including a planar surface opposite the nonplanar surface of the optical microstructure; and

a bonding substrate on the cladding layer opposite the substrate;

wherein the adhesive layer is on the bonding substrate.

26. A contrast enhancement film for a direct-view display having a direct-view display panel and an outer panel that provides an outer surface for the direct-view display, the contrast enhancement film comprising:

a substrate having first and second opposing sides;

an array of optical microstructures on the first side of the substrate to define a nonplanar surface; and

an optically blocking film including an array of apertures therein on the second side of the substrate, wherein the array of apertures are in registry with the array of optical microstructures;

the contrast enhancement film being configured to mount between the direct-view display panel and the outer panel;

wherein the optically blocking film comprises a black layer including the array of apertures therein;

wherein the optically blocking film further comprises a reflective layer including the array of apertures therein, on the black layer opposite the substrate; and

wherein the reflective layer comprises conductive material that is configured to suppress electromagnetic interference that is emitted by the direct-view display panel.

27. A contrast enhancement film for a direct-view display having a direct-view display panel and an outer panel that provides an outer surface for the direct-view display, the contrast enhancement film comprising:

a substrate having first and second opposing sides;

an array of optical microstructures on the first side of the substrate to define a nonplanar surface; and

an optically blocking film including an array of apertures therein on the second side of the substrate, wherein the array of apertures are in registry with the array of optical microstructures;

the contrast enhancement film being configured to mount between the direct-view display panel and the outer panel;

wherein the optically blocking film comprises a black layer including the array of apertures therein;

wherein the optically blocking film further comprises a reflective layer including the array of apertures therein, on the black layer opposite the substrate; and

wherein the reflective layer comprises conductive material that is configured to carry electric signals that are used to operate the direct-view display panel.