PHOSPHOR PASTE COMPOSITION, PLASMA DISPLAY PANEL USING THE SAME, AND MANUFACTURING METHOD THEREOF

Abstract

A phosphor paste composition, a manufacturing method thereof, a plasma display panel using the same, and a manufacturing method thereof, which are capable of achieving an improvement in bright room contrast and realizing a highly definite display, are disclosed.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principle of the invention. In the drawings:

FIGS. 1 and 2 are schematic flow charts illustrating methods for manufacturing phosphor paste compositions in accordance with exemplary embodiments of the present invention, respectively;

FIGS. 3A to 4C are graphs for comparison of the reflectance of phosphors according to exemplary embodiments of the present invention with the reflectance of conventional phosphors; and

FIG. 5 is a sectional view illustrating a plasma display panel manufactured using a phosphor paste composition according to an exemplary embodiment of the present invention.

Claims

1. A phosphor paste composition comprising: phosphor powder; andan organic or inorganic black pigment.

2. The phosphor paste composition according to claim 1, wherein the composition comprises 80 to 99.99 wt % of the phosphor powder, and 0.01 to 20 wt % of the pigment.

3. The phosphor paste composition according to claim 1, wherein the composition comprises 50 to 99.99 wt % of the phosphor powder, 0.01 to 35 wt % of the pigment, and 0 to 15 wt % of a binder.

4. The phosphor paste composition according to claim 1, wherein the composition comprises 20 to 60 wt % of the phosphor powder, 0.01 to 10 wt % of the pigment, and 0 to 15 wt % of a binder, 30 to 80 wt % of a solvent, and 0 to 5 wt % of a deflocculating agent.

5. The phosphor paste composition according to claim 1, wherein the composition comprises 75 to 99.99 wt % of the phosphor powder, 0.01 to 20 wt % of the pigment, and 0 to 15 wt % of a binder.

6. The phosphor paste composition according to claim 1, wherein the composition comprises 20 to 60 wt % of the phosphor powder, 0.01 to 5 wt % of the pigment, and 0 to 15 wt % of a binder, 30 to 80 wt % of a solvent, and 0 to 5 wt % of a deflocculating agent.

7. The phosphor paste composition according to claim 1, further comprising: at least one of α-Fe2O3, (Co, Zn)O.(Al, Cr)2O3, 3CaO—Cr2O3.3SiO2, (Al, Cr)2O3, CoOAl2O3 and 2(Co, Zn)O.SiO2, and ZrSiO4.

8. The phosphor paste composition according to claim 1, wherein the black pigment has a light reflectance of 18% or less.

9. The phosphor paste composition according to claim 8, wherein the pigment comprises at least one of a cobalt-based pigment, a copper-based pigment, carbon black, and a carbon nano tube (CNT).

10. A plasma display panel comprising: first and second substrates arranged in parallel while being spaced apart from each other by a certain distance;a plurality of electrodes formed on facing surfaces of the first and second substrates;a plurality of barrier ribs defining first, second, and third cells as discharge spaces between the first and second substrates; anda phosphor layer formed in at least one of the first, second, and third cells, the phosphor layer containing an organic or inorganic black pigment.

11. The plasma display panel according to claim 10, wherein: the first phosphor layer has a high reflectance in a wavelength band of 550 to 650 nm while having a relatively low reflectance in other wavelength bands;the second phosphor layer has a high reflectance in a wavelength band of 500 to 600 nm while having a relatively low reflectance in other wavelength bands; andthe third phosphor layer has a high reflectance in a wavelength band of 400 to 500 nm while having a relatively low reflectance in other wavelength bands.

12. A plasma display panel comprising: first and second substrates arranged in parallel while being spaced apart from each other by a certain distance;a plurality of electrodes formed on facing surfaces of the first and second substrates;a plurality of barrier ribs defining first, second, and third cells as discharge spaces between the first and second substrates; anda red phosphor layer formed in the first cell while containing an organic or inorganic pigment exhibiting red, a green phosphor layer formed in the second discharge cell, the green phosphor layer containing no pigment, and a blue phosphor layer formed in the third discharge cell while containing an organic or inorganic pigment exhibiting blue.

13. A plasma display panel comprising: first and second substrates arranged in parallel while being spaced apart from each other by a certain distance;a plurality of electrodes formed on facing surfaces of the first and second substrates;a plurality of barrier ribs defining discharge spaces between the first and second substrates; anda phosphor layer formed in each of the discharge spaces, the phosphor layer containing an organic or inorganic black pigment exhibiting black to reduce a reflectance for incident light.

14. A method for manufacturing a plasma display panel, comprising: preparing a first substrate having first electrodes and a second substrate having second electrodes and a plurality of barrier ribs defining cells as discharge spaces;printing a phosphor paste containing an organic or inorganic black pigment in the cells;drying and baking the printed phosphor paste, thereby forming phosphor layers; andassembling the first and second substrate.

15. The method according to claim 14, wherein the printing of the phosphor paste is carried out using at least one of a screen printing method, a dispensing method, and an ink jet method.

16. The method according to claim 14, wherein the baking of the phosphor paste is carried out at a temperature of 400 to 600° C.

17. The method according to claim 14, wherein the phosphor paste has a composition comprising 20 to 60 wt % of phosphor powder, 0.01 to 10% of the pigment, 0 to 15 wt % of a binder, 30 to 80 wt % of a solvent, and 0 to 5 wt % of a deflocculating agent.

18. A method for manufacturing a plasma display panel, comprising: preparing a first substrate having first electrodes and a second substrate having second electrodes and a plurality of barrier ribs defining first, second, and third cells as discharge spaces;printing a first phosphor paste containing an organic or inorganic pigment exhibiting red in the first cell, printing a second phosphor paste containing no pigment in the second cell, and printing a third phosphor paste containing an organic or inorganic pigment exhibiting blue in the third cell;drying and baking the printed phosphor pastes, thereby forming first, second, and third phosphor layers; andassembling the first and second substrate.

19. A method for manufacturing a plasma display panel, comprising: preparing a first substrate having first electrodes and a second substrate having second electrodes and barrier ribs defining discharge spaces;printing a phosphor paste containing an organic or inorganic pigment exhibiting black in the discharge spaces;drying and baking the printed phosphor paste, thereby forming phosphor layers; andassembling the first and second substrate.