Environmentally-adaptive frame assembly

1. A frame assembly comprising:

an inner frame disposed in a dimensionally stable relationship with a display screen where the relationship is substantially maintained during an environmental change which produces a variation in a size of the display screen; and

an outer frame configured to hold the inner frame and accommodate size changes of the inner frame by enabling the display screen and the inner frame to move as an internal unit relative the outer frame.

2. The frame assembly of claim 1 , wherein the environmental change is a change in temperature.

3. The frame assembly of claim 1 , wherein the environmental change is a change in humidity.

4. The frame assembly of claim 1 , wherein a size of the inner frame has a similar variation as the variation of a size of the display screen.

5. The frame assembly of claim 1 , wherein the inner frame and the display screen expand during the environmental change.

6. The frame assembly of claim 1 , wherein the inner frame and the display screen contract during the environmental change.

7. The frame assembly of claim 1 , wherein the display screen has a coefficient of thermal expansion and the inner frame has a substantially similar coefficient of thermal expansion.

8. The frame assembly of claim 1 , wherein the display screen and the inner frame are at least partially of the same material.

9. The frame assembly of claim 1 , further comprising a stiffener configured to support the inner frame.

10. The frame assembly of claim 9 , wherein the stiffener is made at least partially of a substantially rigid material.

11. The frame assembly of claim 9 , wherein the stiffener is braced between a pair of support ribs extending from the inner frame.

12. The frame assembly of claim 1 , wherein the inner frame is configured to slide within the outer frame.

13. The frame assembly of claim 1 , wherein the inner frame includes screen retainer ribs configured to engage the display screen.

14. The frame assembly of claim 13 , wherein the retainer ribs are configured to substantially lock the screen within the inner frame.

15. The frame assembly of claim 14 , wherein the retainer ribs are spring biased.

16. The frame assembly of claim 1 , wherein the outer frame includes an inner frame section support to support the inner frame within the outer frame.

17. The frame assembly of claim 16 , wherein the inner frame section supports include inwardly extending members to prevent the inner frame from sliding out of the outer frame.

18. A frame assembly to support a display screen, the frame assembly comprising:

an inner frame including a screen retainment section configured to retain a display screen of a first material, where the screen retainment section is composed of a second material having a substantially similar coefficient of thermal expansion as the first material; and

an outer frame substantially enclosing the inner frame such that the inner frame floats within the outer frame.

19. The frame assembly of claim 18 , wherein the first material is identical to the second material.

20. The frame assembly of claim 18 , wherein the outer frame is a third substantially rigid material.

21. The frame assembly of claim 18 , wherein the first material and second material are flexible materials.

22. A frame assembly to support a display screen, the frame assembly comprising:

an inner frame including a screen retainment section configured to retain a display screen of a first material, where the screen retainment section is composed of a second material having a substantially similar coefficient of thermal expansion as the first material;

a stiffener adaptively coupled to the screen retainment section; and

an outer frame substantially enclosing the inner frame such that the inner frame floats within the outer frame.

23. The frame assembly of claim 22 , wherein the screen retainment section includes screen retainer ribs configured to grip the display screen.

24. A screen assembly comprising

a screen configured to have a predetermined response to an environmental change; and

a frame assembly including an inner frame and an outer frame, wherein the inner frame tensions the screen and is configured to have a substantially identical response to the environmental change as the screen, and further wherein the outer frame has no contact with the screen.

25. The screen assembly of claim 24 , wherein the environmental change is a change in temperature.

26. The screen assembly of claim 24 , wherein the environmental change is a change in humidity.

27. The screen assembly of claim 24 , wherein the screen comprises a Fresnel lens type screen.

28. The screen assembly of claim 24 , wherein the inner frame of the frame assembly is composed of a material having a substantially identical coefficient of thermal expansion as the screen.

29. The screen assembly of claim 24 , wherein the inner frame includes spring-biased retainer ribs to secure the screen in a preselected position.

30. The screen assembly of claim 24 , wherein the inner frame extends along an upper edge of the screen.

31. The screen assembly of claim 24 , wherein the inner frame is configured to float within the outer frame.

32. The screen assembly of claim 24 , wherein the inner and outer frame extend at least partially around a perimeter of the screen.

33. The frame assembly of claim 22 , wherein the first material is identical to the second material.

34. The frame assembly of claim 22 , wherein the outer frame is a third substantially rigid material.

35. The frame assembly of claim 22 , wherein the first material and the second material are flexible materials.

36. The frame assembly of claim 22 , wherein the display screen is at least partially formed from at least a second of a Fresnel lens type screen.

37. The frame assembly of claim 22 , wherein the inner frame is in a dimensionally stable relationship with the display screen where the relationship is substantially maintained during an environmental change which produces a variation in the size of the display screen.

38. The frame assembly of claim 37 , wherein the environmental change is one of a change in temperature and humidity.