Laminate screen for display device
View Patent ↗A rear projection display device is provided. In an embodiment, the display device includes a laminate screen including a Fresnel lens lamina having a non-planar input surface, a substantially planar output surface and a first index of refraction. The laminate screen further may include a diffusion screen lamina having a substantially planar input surface, an output surface and a second index of refraction. The diffusion screen lamina may be in optical communication with the Fresnel lens lamina. Moreover, the planar output surface of the Fresnel lens lamina and the planar input surface of the diffusion screen lamina may be in facing relationship.
1. A rear projection display device, comprising:
a laminate screen of unitary construction comprising:
a Fresnel lens lamina having a non-planar input surface, a substantially planar output surface and a first index of refraction wherein the non-planar input surface is configured to transmit light to the planar output surface; and
a diffusion screen lamina having a substantially planar input surface, an output surface and a second index of refraction;
wherein the diffusion screen lamina is in intimate contact with the Fresnel lens lamina; and wherein the planar output surface of the Fresnel lens lamina and the planar input surface of the diffusion screen lamina are in facing relationship.
2. The display device of claim 1 , wherein the output surface of the Fresnel lens lamina is bonded directly to the input surface of the diffusion screen lamina.
3. The display device of claim 1 , further comprising at least one intermediate lamina interposed between the Fresnel lens lamina and the diffusion screen lamina.
4. The display device of claim 3 , wherein the at least one intermediate lamina comprises an adhesive.
5. The display device of claim 1 , wherein the laminate screen further comprises a protective screen lamina bonded to the diffusion screen lamina output surface.
6. The display device of claim 1 wherein the output surface of the diffusion screen lamina is non-planar.
7. The display device of claim 6 , wherein the output surface of the diffusion screen lamina comprises a plurality of lenses.
8. The display device of claim 7 , wherein the plurality of lenses comprise linear lenses.
9. The display device of claim 6 , wherein the output surface of the diffusion screen lamina comprises a plurality of prisms.
10. The display device of claim 6 , wherein the output surface of the diffusion screen lemma comprises a plurality of pyramids.
11. The display device of claim 6 , wherein the output surface of the diffusion screen lamina comprises a plurality of prisms and a plurality of linear lenses.
12. The display device of claim 6 , wherein the output surface of the diffusion screen lamina comprises a plurality of pyramids and a plurality of lenses.
13. A screen for use in rear projection display devices, comprising:
a Fresnel lens lamina having a non-planar input surface and a substantially planar output surface and having a first index of refraction wherein the non-planar input surface is configured to transmit an image to the planar output surface; and
a diffusion screen lamina having a substantially planar input surface and an output surface and having a second index of refraction;
wherein the diffusion screen is in intimate contact with the Fresnel lens lamina; and wherein the planar output surface of the Fresnel lens lamina and the planar input surface of the diffusion screen lamina are in facing relationship to form a laminate screen of unitary construction.
14. The screen of claim 13 , wherein the output surface of the Fresnel lens lamina is bonded directly to the input surface of the diffusion screen lamina.
15. The screen of claim 13 , further comprising at least one intermediate lamina interposed between the Fresnel lens lamina and the diffusion screen lamina.
16. The semen of claim 13 , wherein the laminate screen further comprises a protective screen lamina bonded to the diffusion screen lamina output surface.
17. The screen of claim 13 , wherein the output surface of the diffusion screen lamina comprises a plurality of lenses.
18. The screen of claim 17 , wherein the plurality of lenses comprise linear lenses.
19. The screen of claim 13 , wherein the output surface of the diffusion screen lamina comprises a plurality of prisms.
20. The screen of claim 13 wherein the output surface of the diffusion screen lamina comprises a plurality of pyramids.
21. The screen of claim 13 , wherein the output surface of the diffusion screen lamina comprises a plurality of prisms and a plurality of linear lenses.
22. The screen of claim 13 , wherein the output surface of the diffusion screen lamina comprises a plurality of pyramids and a plurality of lenses.
23. A method of manufacturing a screen for a rear projection display device, the method comprising:
forming a Fresnel lens lamina having a non-planar input surface and a substantially planar output surface and having a first index of refraction wherein the input surface is configured to transmit an image to the output surface;
forming a diffusion screen lamina having a substantially planar input surface and a non-planar output surface and having a second index of refraction wherein the input surface is configured to transmit the image to the output surface; and
laminating a screen from the diffusion screen lamina and the Fresnel screen lamina, wherein the diffusion screen is in intimate contact with the Fresnel lens lamina; and wherein the planar output surface of the Fresnel lens lamina and the planar input surface of the diffusion screen lamina are in a facing relationship.
24. The method of claim 23 , wherein the output surface of the Fresnel lens is laminated directly to the input surface of the diffusion screen.
25. The method of claim 23 , further comprising forming at least one intermediate lamina, and wherein the laminating step includes laminating the at least one intermediate lamina between the Fresnel lens lamina and the diffusion screen lamina.
26. The method of claim 23 , wherein the step of forming a diffusion screen lamina further comprises forming a plurality of lenses on the output surface.
27. The method of claim 23 , wherein the step of forming a diffusion screen lamina further comprises forming a plurality of prisms on the output surface.
28. The method of claim 23 , wherein the step of forming a diffusion screen lamina further comprises forming a plurality of pyramids on the output surface.
29. The method of claim 23 , wherein the step of forming a diffusion screen further comprises forming a plurality of lenses and a plurality of prisms on the output surface.
30. The method of claim 23 wherein the step of forming a diffusion screen lamina further comprises forming a plurality of pyramids and a plurality of lenses on the output surface.