Plasma display panel having high brightness and high contrast

• US 20050104518A1
• Filed: 10/15/2004
• Published: 05/19/2005
• Est. Priority Date: 10/21/2003
• Status: Active Grant

• Current Assignee: Samsung SDI Company Limited
• Original Assignee: Samsung SDI Company Limited
• Inventors: Hong, Chong-Gi, Kang, Tae-Kyoung
• Granted Patent: US 7,323,819 B2
• Time in Patent Office: Days
• US Class Current: 313/582
• CPC Class Codes: H01J 11/12 with main electrodes provided on both sides of the discharge space
• 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

Abstract

A plasma display panel having a light absorption reflection film that does not reflect light emitted from a discharge space in a non-discharge region includes: a rear substrate; a plurality of address electrodes arranged on a surface of the rear substrate; a rear dielectric layer arranged on the rear substrate to cover the address electrodes; a plurality of barrier ribs arranged on the rear dielectric layer to define discharge cells; a front substrate facing the rear substrate; a plurality of sustaining electrode pairs composed of X and Y electrodes; a light absorption reflection film including a first light absorption reflection film arranged between the adjacent sustaining electrode pairs and a second light absorption reflection film having a different width than that of the first light absorption reflection film, the second light absorption reflection film arranged on a lower surface of the first light absorption reflection film; and a front dielectric layer arranged on a lower surface of the front substrate to cover the X and Y electrodes and the light absorption reflection film.

Claims

1. A plasma display panel comprising:

a rear substrate;

a plurality of address electrodes arranged on a surface of the rear substrate;

a rear dielectric layer arranged on the rear substrate to cover the address electrodes;

a plurality of barrier ribs adapted to define discharge cells, the plurality of barrier ribs arranged on an upper portion of the rear dielectric layer;

a fluorescent material adapted to coat an inner surface of the discharge cells;

a front substrate arranged to face the rear substrate;

a plurality of sustain electrode pairs, each pair composed of X and Y electrodes adapted to form unit discharge cells and to cross the address electrodes and arranged on a lower surface of the front substrate;

a light absorption reflection film including a first light absorption reflection film arranged between adjacent sustain electrode pairs on a lower surface of the front substrate and a second light absorption reflection film having a different width than that of the first light absorption reflection film, the second light absorption reflection film arranged on a lower surface of the first light absorption reflection film; and

a front dielectric layer arranged on a lower surface of the front substrate to cover the X and Y electrodes and the light absorption reflection film.

2. The plasma display panel of claim 1, wherein the first light absorption reflection film and the second light absorption reflection film are arranged to have a stair shape having a step difference.

3. The plasma display panel of claim 2, wherein when the greater of the widths of the first and second light absorption reflection films is A and the narrower width is B, a value of (A−

B)/A×

100 is in a range of 5-70.

4. The plasma display panel of claim 1, wherein a width of the light absorption reflection film is gradually increased from an upper surface of the first light absorption reflection film to a lower surface of the second light absorption reflection film.

5. The plasma display panel of claim 4, wherein side surfaces of the light absorption reflection film have a slope angle in a range of 5-80°

with respect to the lower surface of the front substrate, and when the greater of the widths of the first and the second light absorption reflection films is A, and the narrower width is B, the value of (A−

B)/A×

100 is in a range of 5-70.

6. The plasma display panel of claim 1, wherein center lines of the first light absorption reflection film and the second light absorption reflection film are equal.

7. The plasma display panel of claim 1, wherein the first and second light absorption reflection films are black.

8. A plasma display panel comprising:

a rear substrate;

a plurality of address electrodes arranged on a surface of the rear substrate;

a rear dielectric layer arranged on the rear substrate to cover the address electrodes;

a plurality of barrier ribs adapted to define discharge cells, the plurality of barrier ribs arranged on an upper portion of the rear dielectric layer;

a fluorescent material adapted to coat an inner surface of the discharge cells;

a front substrate arranged to face the rear substrate;

a plurality of sustain electrode pairs, each pair composed of X and Y electrodes adapted to form unit discharge cells and to cross the address electrodes and arranged on a lower surface of the front substrate;

a light absorption reflection film including a first light absorption reflection film arranged between adjacent sustain electrode pairs on a lower surface of the front substrate and a second light absorption reflection film having a different width than that of the first light absorption reflection film and composed of a material having a higher reflectance than that of the first light absorption reflection film, the second light absorption reflection film arranged on a lower surface of the first light absorption reflection film; and

a front dielectric layer arranged on a lower surface of the front substrate to cover the X and Y electrodes and the light absorption reflection film.

9. The plasma display panel of claim 8, wherein the first light absorption reflection film and the second light absorption reflection film are arranged to have a stair shape having a step difference.

10. The plasma display panel of claim 9, wherein when the greater of the widths of the first and second light absorption reflection films is A and the narrower width is B, a value of (A−

B)/A×

100 is in a range of 5-70.

11. The plasma display panel of claim 8, wherein a width of the light absorption reflection film is gradually increased from an upper surface of the first light absorption reflection film to a lower surface of the second light absorption reflection film.

12. The plasma display panel of claim 11, wherein side surfaces of the light absorption reflection film have a slope angle in a range of 5˜

80°

with respect to the lower surface of the front substrate, and when the greater of the widths of the first and the second light absorption reflection films is A, and the narrower width is B, the value of (A−

B)/A×

100 is in a range of 5-70.

13. The plasma display panel of claim 8, wherein center lines of the first light absorption reflection film and the second light absorption reflection film are equal.

14. The plasma display panel of claim 8, wherein the first light absorption reflection film includes more than one metal selected from the group consisting of Ru, Mn, Ni, Cr, Fe, and Co, and the second light absorption reflection film includes TiO₂.

15. The plasma display panel of claim 8, wherein the first light absorption reflection film is black and the second light absorption reflection film is white.

16. A plasma display panel comprising:

a rear substrate;

a plurality of address electrodes arranged on a surface of the rear substrate;

a rear dielectric layer arranged on the rear substrate to cover the address electrodes;

a plurality of barrier ribs adapted to define discharge cells, the plurality of barrier ribs arranged on an upper portion of the rear dielectric layer;

a fluorescent material adapted to coat an inner surface of the discharge cells;

a front substrate arranged to face the rear substrate;

a plurality of sustain electrode pairs, each pair composed of X and Y electrodes adapted to form unit discharge cells and to cross the address electrodes and arranged on a lower surface of the front substrate;

a front dielectric layer arranged on a lower surface of the front substrate to cover the sustain electrode pairs; and

a light absorption reflection film including a first light absorption reflection film arranged between the adjacent sustain electrode pairs on a lower surface of the front dielectric layer and a second light absorption reflection film having a different width than that of the first light absorption reflection film, the second light absorption reflection film arranged on a lower surface of the first light absorption reflection film.

17. The plasma display panel of claim 16, wherein the first light absorption reflection film and the second light absorption reflection film are arranged to have a stair shape having a step difference.

18. The plasma display panel of claim 17, wherein when the greater of the widths of the first and second light absorption reflection films is A and the narrower width is B, a value of (A−

B)/A×

100 is in a range of 5-70.

19. The plasma display panel of claim 16, wherein a width of the light absorption reflection film is gradually increased from an upper surface of the first light absorption reflection film to a lower surface of the second light absorption reflection film.

20. The plasma display panel of claim 19, wherein side surfaces of the light absorption reflection film have a slope angle in a range of 5-80°

with respect to the lower surface of the front substrate, and when the greater of the widths of the first and the second light absorption reflection films is A, and the narrower width is B, the value of (A−

B)/A×

100 is in a range of 5-70.

21. The plasma display panel of claim 16, wherein center lines of the first light absorption reflection film and the second light absorption reflection film are equal.

22. The plasma display panel of claim 16, wherein the first light absorption reflection film includes more than one metal selected from the group consisting of Ru, Mn, Ni, Cr, Fe, and Co, and the second light absorption reflection film includes TiO₂.

23. The plasma display panel of claim 16, wherein the first light absorption reflection film and the second light absorption reflection film are black.

24. A plasma display panel comprising:

a rear substrate;

a plurality of address electrodes arranged on a surface of the rear substrate;

a rear dielectric layer arranged on the rear substrate to cover the address electrodes;

a plurality of barrier ribs adapted to define discharge cells, the plurality of barrier ribs arranged on an upper portion of the rear dielectric layer;

a fluorescent material adapted to coat an inner surface of the discharge cells;

a front substrate arranged to face the rear substrate;

a plurality of sustain electrode pairs, each pair composed of X and Y electrodes adapted to form unit discharge cells and to cross the address electrodes and arranged on a lower surface of the front substrate;

a light absorption reflection film including a first light absorption reflection film arranged between adjacent sustain electrode pairs on a lower surface of the front substrate and a second light absorption reflection film having a different width than that of the first light absorption reflection film and composed of a material having a higher reflectance than that of the first light absorption reflection film, the second light absorption reflection film arranged on a lower surface of the first light absorption reflection film; and

a light absorption reflection film including a first light absorption reflection film arranged between adjacent sustain electrode pairs on a lower surface of the front dielectric layer and a second light absorption reflection film having a different width than that of the first light absorption reflection film and composed of a material having a higher reflectance than that of the first light absorption reflection film, the second light absorption reflection film arranged on a lower surface of the first light absorption reflection film.

25. The plasma display panel of claim 24, wherein the first light absorption reflection film and the second light absorption reflection film are arranged to have a stair shape having a step difference.

26. The plasma display panel of claim 25, wherein when the greater of the widths of the first and second light absorption reflection films is A and the narrower width is B, a value of (A−

B)/A×

100 is in a range of 5-70.

27. The plasma display panel of claim 24, wherein a width of the light absorption reflection film is gradually increased from an upper surface of the first light absorption reflection film to a lower surface of the second light absorption reflection film.

28. The plasma display panel of claim 27, wherein side surfaces of the light absorption reflection film have a slope angle in a range of 5-80′

with respect to the lower surface of the front substrate, and when the greater of the widths of the first and the second light absorption reflection films is A and the narrower width is B, the value of (A−

B)/A×

100 is in a range of 5-70.

29. The plasma display panel of claim 24, wherein center lines of the first light absorption reflection film and the second light absorption reflection film are equal.

30. The plasma display panel of claim 24, wherein the first light absorption reflection film includes more than one metal selected from the group consisting of Ru, Mn, Ni, Cr, Fe, and Co, and the second light absorption reflection film includes TiO₂.

31. The plasma display panel of claim 24, wherein the first light absorption reflection film is black and the second light absorption reflection film is white.

32. A plasma display panel comprising:

a rear substrate;

a plurality of address electrodes arranged on a surface of the rear substrate;

a rear dielectric layer arranged on the rear substrate to cover the address electrodes;

a plurality of barrier ribs adapted to define discharge cells, the plurality of barrier ribs arranged on an upper portion of the rear dielectric layer;

a fluorescent material adapted to coat an inner surface of the discharge cells;

a front substrate arranged to face the rear substrate;

a plurality of sustain electrode pairs, each pair composed of X and Y electrodes adapted to form unit discharge cells and to cross the address electrodes and arranged on a lower surface of the front substrate;

a light absorption reflection film undercut such that a width of a lower surface is narrower than that of an upper surface contacting the front substrate, the light absorption reflection film arranged between adjacent sustain electrode pairs on a lower surface of the front substrate; and

a front dielectric layer arranged on a lower surface of the front substrate to cover the X and Y electrodes and the light absorption reflection film.

33. The plasma display panel of claim 32, wherein side surfaces of the light absorption reflection film have a slope angle in a range of 5-80°

with respect to the lower surface of the front substrate, and when the lower surface of the light absorption reflection films is A and the upper surface of the light absorption reflection film is B, the value of (A−

B)/A×

100 is in a range of 5-70.

34. The plasma display panel of claim 32, wherein the light absorption reflection film is a single layer undercut such that a width of the light absorption reflection film is gradually decreased from an upper surface of the first light absorption reflection film to a lower surface of the second light absorption reflection film.

35. A plasma display panel comprising:

a rear substrate;

a plurality of address electrodes arranged on a surface of the rear substrate;

a rear dielectric layer arranged on the rear substrate to cover the address electrodes;

a plurality of barrier ribs adapted to define discharge cells, the plurality of barrier ribs arranged on an upper portion of the rear dielectric layer;

a fluorescent material adapted to coat an inner surface of the discharge cells;

a front substrate arranged to face the rear substrate;

a plurality of sustain electrode pairs, each pair composed of X and Y electrodes adapted to form unit discharge cells and to cross the address electrodes and arranged on a lower surface of the front substrate;

a front dielectric layer arranged on a lower surface of the front substrate to cover the sustain electrode pairs; and

a light absorption reflection film undercut such that a width of an upper surface, contacting the front dielectric layer is narrower than that of a lower surface, the light absorption reflection film arranged between adjacent sustain electrode pairs on a lower surface of the front substrate.

36. The plasma display panel of claim 35, wherein side surfaces of the light absorption reflection film have a slope angle in a range of 5-80′

with respect to the lower surface of the front dielectric layer, and when the lower surface of the light absorption reflection film is A and the upper surface of the light absorption reflection film is B, the value of (A−

B)/A×

100 is in a range of 5-70.

37. The plasma display panel of claim 35, wherein the light absorption reflection film is a single layer undercut such that the a width of the light absorption reflection film is gradually increased from an upper surface of the first light absorption reflection film to a lower surface of the second light absorption reflection film.