Field emission display device and field emission type backlight device having a sealing structure for vacuum exhaust

Abstract

A field emission display device and a field emission type backlight device having a sealing structure for a vacuum exhaust are provided. The field emission display device is constructed with a cathode substrate and an anode substrate attached to each other and facing each other and a vacuum-exhausted panel space formed therebetween to generated a visual image. Also, the field emission display device is constructed with a sealing member disposed along edges of the cathode substrate and the anode substrate to seal the panel space. At least one inlet exposed to the panel space and an exhaust passage through which the inlet communicates with an outside of the field emission display device are formed in the sealing member. The field emission display device and the field emission type backlight device according to the present invention has a reduced number of manufacturing processes and is suitable for a compact, slim and lightweight design, and a large screen by having the sealing structure for the vacuum exhaust.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

A more complete appreciation of the invention and many of the attendant advantages thereof, will be readily apparent as the same becomes better understood by reference to the following detailed description when considered in conjunction with the accompanying drawings in which like reference symbols indicate the same or similar components, wherein:

FIG. 1 is a plan view of a field emission display device constructed as an embodiment of the principles of the present invention;

FIG. 2 is an exploded oblique view of a display region of the field emission display device of FIG. 1, constructed as an embodiment of the principles of the present invention;

FIG. 3 is a cross-sectional view of the field emission display device of FIG. 1 taken along line III-III, constructed as an embodiment of the principles of the present invention;

FIG. 4 is an oblique view of a sealing member shown in FIG. 3, constructed as an embodiment of the principles of the present invention;

FIG. 5 is an oblique view of an exhaust tube included in the sealing member shown in FIG. 4, constructed as an embodiment of the principles of the present invention;

FIG. 6 is a vertical sectional view of a field emission display device constructed as another embodiment of the principles of the present invention;

FIG. 7 is an oblique view of an exhaust tube included in the field emission display device of FIG. 6, constructed as another embodiment of the principles of the present invention;

FIG. 8 is a vertical cross-sectional view of a field emission display device constructed as still another embodiment of the principles of the present invention;

FIG. 9 is an oblique view of an exhaust tube included in the field emission display device of FIG. 8, constructed as an embodiment of the principles of the present invention;

FIG. 10 is an oblique view of an exhaust tube included in the field emission display device of FIG. 8, constructed as another embodiment of the principles of the present invention; and

FIG. 11 is a vertical cross-sectional view of a field emission display constructed as a further embodiment of the principles of the present invention.

Claims

1. A field emission display device, comprising: a cathode substrate and an anode substrate disposed to face each other and form an interposed vacuum-exhausted panel space to form a visual image; anda sealing member disposed continuously along the edges of the cathode substrate and the anode substrate to seal the panel space, with the sealing member comprising at least one inlet exposed to the panel space and an exhaust passage through which the inlet communicates with an outside the panel space of the field emission display device.

2. The field emission display device of claim 1, with the sealing member having a rectangular frame shape, and comprising a pair of flit bars constituting longer sides of the sealing member and a pair of exhaust tubes in which the exhaust passage is formed constituting shorter sides of the sealing member.

3. The field emission display device of claim 2, with the inlet comprising a plurality of holes formed at intervals in a length direction of the exhaust tubes.

4. The field emission display device of claim 2, with the inlet comprising one hole formed in an elongated shape in a length direction of the exhaust tubes.

5. The field emission display device of claim 2, with each of the exhaust tubes being made from a hollow member having a square cross section and having a first surface facing the anode substrate and a second surface facing the cathode substrate.

6. The field emission display device of claim 2, with each of the exhaust tubes being made from a cylindrical hollow member.

7. The field emission display device of claim 2, with each of the frit bars being made from a solid member having a square cross section.

8. The field emission display device of claim 2, with the frit bars and the exhaust tubes being made from a glass material.

9. The field emission display device of claim 2, with the frit bars and the exhaust tubes being attached to each other through heat fusion of a frit paste interposed therebetween.

10. The field emission display device of claim 2, with each of the exhaust tubes comprising at least one end portion extending outside the cathode substrate and the anode substrate.

11. The field emission display device of claim 1, further comprising a frit paste to attach the substrates through heat fusion, with the frit paste being formed on upper and lower surfaces of the sealing member facing the cathode substrate and the anode substrate.

12. The field emission display device of claim 1, further comprising a getter being injected into the sealing member to adsorb an impure gas.

13. The field emission display device of claim 12, with the getter being disposed on the exhaust passage of the impure gas.

14. The field emission display device of claim 1, with the cathode substrate comprising a cathode electrode arranged in a stripe pattern in a first direction and a gate electrode extending in a second direction crossing the cathode electrode, and an emitter disposed as an electron emission source in a crossing region of the cathode electrode and the gate electrode, and the anode substrate comprising an anode electrode for accelerating electrons emitted from the emitter, and red, green, and blue phosphor layers emitting a light by colliding with the accelerated electrons, the anode electrode and the red, green and blue phosphor layers being disposed in a array.

15. A field emission type backlight device, comprising: a cathode substrate and an anode substrate disposed to face each other and form an interposed vacuum-exhausted panel space to provide uniform light to an image forming panel; anda sealing member disposed continuously along edges of the cathode substrate and the anode substrate to seal the panel space, with the sealing member comprising at least one inlet exposed to the panel space and an exhaust passage through which the inlet communicates with an environment exterior to the backlight device.

16. The field emission type backlight device of claim 15, with the sealing member having a rectangular frame shape, and comprising a pair of frit bars constituting longer sides of the sealing member and a pair of exhaust tubes through which the exhaust passage is formed constituting shorter sides of the sealing member.

17. The field emission type backlight device of claim 16, with the inlet comprising a plurality of holes formed at intervals in a length direction of the exhaust tubes.

18. The field emission type backlight device of claim 16, with the inlet comprising a hole formed in an elongated shape in a length direction of the exhaust tubes.

19. The field emission type backlight device of claim 16, with each of the exhaust tubes being made from a hollow member having a square cross section having a first surface facing the anode substrate and a second surface facing the cathode substrate.

20. The field emission type backlight device of claim 16, with each of the exhaust tubes being made from a cylindrical hollow member.

21. The field emission type backlight device of claim 16, with each of the frit bars being made from a solid member having a square cross section.

22. The field emission type backlight device of claim 15, further comprising a frit paste to attach the cathode substrate and the anode substrate through heat fusion, with the frit paste being formed in upper and lower surfaces of the sealing member facing the cathode substrate and the anode substrate.

23. The field emission type backlight device of claim 15, further comprising a getter injected into the sealing member to adsorb an impure gas.

24. The field emission type backlight device of claim 23, with the getter being disposed on an exhaust passage of the impure gas.

25. The field emission type backlight device of claim 15, with the cathode substrate comprising a cathode electrode arranged in a stripe pattern in a first direction and a gate electrode extending in a second direction crossing the cathode electrode, and an emitter disposed as an electron emission source in a crossing region of the cathode electrode and the gate electrode, and the anode substrate comprising an anode electrode for accelerating electrons emitted from the emitter and phosphor layer emitting a light by colliding with the accelerated electrons.