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1. (WO1997019460) FLAT PANEL DISPLAY WITH REDUCED ELECTRON SCATTERING EFFECTS
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CLAIMS

1 A flat panel display, comprising
a faceplate including a faceplate interior side;
a backplate including a backplate interior side in an opposing relationship to the faceplate interior side;
side walls positioned between the faceplate and the backplate to form an enclosed sealed envelope between the side walls, backplate interior side and the faceplate interior side;
a plurality of phosphor subpixels positioned at the faceplate interior side; a plurality of field emitters that emit electrons which are directed to a corresponding phosphor subpixel, and
a plurality of scattering shields surrounding each phosphor subpixel and defining a subpixel volume, the scattering shields reducing a number of scattered electrons in the subpixel volume from escaping from the subpixel volume, wherein the height of the scattering shields surrounding a phosphor subpixel is sufficient to reduce the number of scattered electrons from exiting from their corresponding subpixel volume to strike another phosphor subpixel.

2 The display of claim 1, wherein the height of the scattering shields surrounding a phosphor subpixel is sufficient to reduce the number of scattered electrons from exiting from their corresponding subpixel volume to strike and charge an insulating surface in the envelope.

3. The display of claim 1, wherein the height of the scattering shields surrounding a phosphor subpixel is sufficient to reduce the number of scattered electrons exiting from their corresponding subpixel volume to strike another phosphor subpixel

4 The display of claim 1, wherein the height of the scattering shields is about 20 to 200 μm beyond the phosphor subpixels.

5. The display of claim 1, wherein the height of the scattering shields is about 20 to 100 μm beyond the phosphor subpixels

6 The display of claim 1, wherein the phosphor subpixels have a height that extends about 1 to 30 μm from the faceplate interior side into the envelope

7. The flat panel display of claim 6, wherein the scattering shields have a height of about 12 μm extending beyond the phosphor subpixels

8 The flat pane! display of claim 6, wherein the scattering shields have a height of about 25 μm extending beyond the phosphor subpixels

9. The flat panel display of claim 6, wherein the scattering shields have a height of about 50 μm extending beyond the phosphor subpixels

10 The flat panel display of claim 6, wherein the scattering shields have a height of about 75 μm extending beyond the phosphor subpixels

11. The flat panel display of claim 6, wherein the scattering shields have a height of about 100 μm extending beyond the phosphor subpixels

12. The display of claim 1, further comprising- at least one internal support in the envelope supporting the backplate and the faceplate against forces acting in a direction toward the envelope

13 The display of claim 1, wherein the scattering shields surrounding a phosphor subpixel are of sufficient height to reduce the number of scattered electrons escaping from their corresponding subpixel volume to strike and charge the internal support 4 The display of claim 1, wherein the scattering shields are made of a material selected from the group consisting of polyimide, metal, glass and ceramic

15 The display of claim 1, wherein a scattering shield glass interface is at least partially made of an optically absorbing material

16 The display of claim 1 , wherein a voltage equal to or greater than lkV is applied between the backplate and the faceplate

17 The display of claim 1 , wherein a voltage equal to or greater than 3kV is applied between the backplate and the faceplate

18 The display of claim 1, wherein a voltage equal to or greater than 5kV is applied between the backplate and the faceplate

19 The display of claim 1, wherein a voltage equal to or greater than 7kV is applied between the backplate and the faceplate

20 The display of claim 1, wherein a voltage applied between the backplate and the faceplate is about 1 OkV

21 A flat panel display, comprising
a faceplate including a faceplate interior side,
a backplate including a backplate interior side in an opposing relationship to the faceplate interior side;
side walls positioned between the faceplate and the backplate to form an enclosed sealed envelope between the side walls, backplate interior side and the faceplate interior side, the faceplate, backplate and side walls defining a display envelope with at least one internal support,
a plurality of phosphor subpixels positioned at the faceplate inteπor side, a plurality of field emitters that emit electrons which are directed to a corresponding phosphor subpixel,
a plurality of scattering shields surrounding each phosphor subpixel and defining a subpixel volume, the scattering shields reducing a number of scattered electrons in the subpixel volume from escaping from the subpixel volume, wherein the height of the scattering shields surrounding a phosphor subpixel is sufficient to reduce the number of scattered electrons from exiting from their corresponding subpixel volume to strike and charge an internal insulating surface in the envelope; and
a locating groove formed in a column or row guard band, the locating groove adapted to receive an intemal support and mount it relative to the phosphor subpixels

22 The display of claim 21, wherein the height of the scattering shields surrounding a phosphor subpixel is sufficient to reduce the number of scattered electrons exiting from their corresponding subpixel volume to strike another phosphor subpixel

23 The display of claim 21, wherein the height of the scattering shields is about 20 to 200 μm beyond the phosphor subpixels

24 The display of claim 21, wherein the height of the scattering shields is about 20 to 100 μm beyond the phosphor subpixels.

25 The display of claim 21, wherein the phosphor subpixels have a height that extends about 1 to 30 μm from the faceplate interior side into the envelope

26 The flat panel display of claim 25, wherein the scattering shields have a height of about 12 μm extending beyond the phosphor subpixels 27 The flat panel display of claim 25, wherein the scattering shields have a height of about 25 μm extending beyond the phosphor subpixels

28 The flat panel display of claim 25, wherein the scattering shields have a height of about 50 μm extending beyond the phosphor subpixels

29 The flat panel display of claim 25, wherein the scattering shields have a height of about 75 μm extending beyond the phosphor subpixels

30 The flat panel display of claim 25, wherein the scattering shields have a height of about 100 μm extending beyond the phosphor subpixels

31. The display of claim 21 , further comprising
at least one intemal support in the envelope supporting the backplate and the faceplate against forces acting in a direction toward the envelope

32 The display of claim 21, wherein the scattering shields surrounding a phosphor subpixel are of sufficient height to reduce the number of scattered electrons escaping from their corresponding subpixel volume to strike and charge the internal support

33 The display of claim 21, wherein the scattering shields are made of a material selected from the group consisting of polyimide, metal, glass and ceramic

34 The display of claim 21, wherein a voltage equal to or greater than lkV is applied between the backplate and the faceplate

35 The display of claim 21, wherein a voltage equal to or greater than 3kV is applied between the backplate and the faceplate 36 The display of claim 21, wherein a voltage equal to or greater than 5kV is applied between the backplate and the faceplate

37 The display of claim 21, wherein a voltage equal to or greater than 7kV is applied between the backplate and the faceplate

38 The display of claim 21, wherein a voltage applied between the backplate and the faceplate is about lOkV