Plasma display panel

• US 7,239,085 B2
• Filed: 09/07/2004
• Issued: 07/03/2007
• Est. Priority Date: 10/08/2003
• Status: Expired due to Fees

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Pioneer Corporation
• Inventors: Kawamura, Hiroshi
• Primary Examiner(s): Patel; Vip
• Application Number:
  US10/934,548
• Publication Number:
  US 20050077810A1
• Time in Patent Office: 1,029 Days
• Field of Search: 313/581, 313/582, 313/586, 313/587, 313/486
• US Class Current: 313/582
• CPC Class Codes: C09K 11/7734 Aluminates
• CPC Class Codes: C09K 11/77342 Silicates
• CPC Class Codes: H01J 11/12 with main electrodes provided on both sides of the discharge space
• CPC Class Codes: H01J 11/42 Fluorescent layers

Abstract

A plasma display panel includes a first substrate, and a second substrate facing the first substrate. The first substrate includes a transparent substrate, a scanning electrode and a common electrode both formed on the transparent substrate, and a dielectric layer covering the transparent substrate, the scanning electrode and the common electrode therewith. The second substrate includes an electrically insulating substrate, data electrodes formed on the electrically insulating substrate, partition walls formed on the electrically insulating substrate, and a phosphor layer covering the electrically insulating substrate and the data electrodes therewith between adjacent partition walls. The phosphor layer includes a blue-phosphor layer composed of phosphor which emits a blue light. The blue-phosphor layer is composed of a mixture of two or more phosphors each of which emits a blue light and has an initial brightness and variation of brightness with the lapse of time both different from one another.

Claims

1. A plasma display panel comprising a first substrate facing a viewer, and a second substrate arranged in facing relation to said first substrate,

said first substrate being comprised of

a transparent substrate;

a scanning electrode and a common electrode both formed on said transparent substrate in facing relation to said second substrate; and

a dielectric layer covering said transparent substrate, said scanning electrode and said common electrode therewith,

said second substrate being comprised of

an electrically insulating substrate;

a plurality of data electrodes formed on said electrically insulating substrate;

a plurality of partition walls formed on said electrically insulating substrate; and

a phosphor layer covering said electrically insulating substrate and said data electrodes therewith between adjacent partition walls,

said phosphor layer including at least a blue-phosphor layer composed of phosphor which emits a blue light,

said blue-phosphor layer being composed of a mixture of two or more phosphors each of which emits a blue light and has an initial brightness and variation of brightness with the lapse of time both different from one another.

2. The plasma display panel as set forth in claim 1, wherein said blue-phosphor layer is composed of a mixture of first phosphor which emits a blue light and second phosphor which emits a blue light, said second phosphor having an initial brightness smaller than the same of said first phosphor, and smaller variation of brightness with the lapse of time than the same of said first phosphor.

3. The plasma display panel as set forth in claim 2, wherein said blue-phosphor layer includes said first phosphor in the range of 10 to 90 weight % both inclusive.

4. The plasma display panel as set forth in claim 1, wherein said blue-phosphor layer is composed of a mixture of at least one kind of first phosphor which emits a blue light and includes aluminate having bivalent europium (Eu²⁺), and at least one kind of second phosphor which emits a blue light and includes silicate having bivalent europium (Eu²⁺).

5. The plasma display panel as set forth in claim 4, wherein said blue-phosphor layer includes said first phosphor in the range of 10 to 90 weight % both inclusive.

6. The plasma display panel as set forth in claim 4, wherein said first phosphor is BaMgAl₁₀O₁₇:

Eu²⁺.

7. The plasma display panel as set forth in claim 4, wherein said second phosphor is CaMgSi₂O₆:

Eu²⁺.

8. The plasma display panel as set forth in claim 4, wherein said first phosphor is comprised of BaMgAl₁₀O₁₇:

Eu²⁺ and at least one kind of another phosphor which emits a blue light and includes aluminate having bivalent europium (Eu²⁺).

9. The plasma display panel as set forth in claim 4, wherein said second phosphor is comprised of CaMgSi₂O₆:

Eu²⁺ and at least one kind of another phosphor which emits a blue light and includes silicate having bivalent europium (Eu²⁺).

10. A plasma display unit including a plasma display panel as a display panel,

said plasma display panel comprising a first substrate facing a viewer, and a second substrate arranged in facing relation to said first substrate,

said first substrate being comprised of

a transparent substrate;

a scanning electrode and a common electrode both formed on said transparent substrate in facing relation to said second substrate; and

a dielectric layer covering said transparent substrate, said scanning electrode and said common electrode therewith,

said second substrate being comprised of

an electrically insulating substrate;

a plurality of data electrodes formed on said electrically insulating substrate;

a plurality of partition walls formed on said electrically insulating substrate; and

a phosphor layer covering said electrically insulating substrate and said data electrodes therewith between adjacent partition walls,

said phosphor layer including at least a blue-phosphor layer composed of phosphor which emits a blue light,

said blue-phosphor layer being composed of a mixture of two or more phosphors each of which emits a blue light and has an initial brightness and variation of brightness with the lapse of time both different from one another.

11. The plasma display unit as set forth in claim 10, wherein said blue-phosphor layer is composed of a mixture of first phosphor which emits a blue light and second phosphor which emits a blue light, said second phosphor having an initial brightness smaller than the same of said first phosphor, and smaller variation of brightness with the lapse of time than the same of said first phosphor.

12. The plasma display unit as set forth in claim 11, wherein said blue-phosphor layer includes said first phosphor in the range of 10 to 90 weight % both inclusive.

13. The plasma display unit as set forth in claim 10, wherein said blue-phosphor layer is composed of a mixture of at least one kind of first phosphor which emits a blue light and includes aluminate having bivalent europium (Eu²⁺), and at least one kind of second phosphor which emits a blue light and includes silicate having bivalent europium (Eu²⁺).

14. The plasma display unit as set forth in claim 13, wherein said blue-phosphor layer includes said first phosphor in the range of 10 to 90 weight % both inclusive.

15. The plasma display unit as set forth in claim 14, wherein said first phosphor is BaMgAl₁₀O₁₇:

Eu²⁺.

16. The plasma display unit as set forth in claim 13, wherein said second phosphor is CaMgSi₂O₆:

Eu²⁺.

17. The plasma display unit as set forth in claim 13, wherein said first phosphor is comprised of BaMgAl₁₀O₁₇:

Eu²⁺ and at least one kind of another phosphor which emits a blue light and includes aluminate having bivalent europium (Eu²⁺).

18. The plasma display unit as set forth in claim 13, wherein said second phosphor is comprised of CaMgSi₂O₆:

Eu²⁺ and at least one kind of another phosphor which emits a blue light and includes silicate having bivalent europium (Eu²⁺).

19. A plasma display unit comprising:

an analog interface which converts a received analog image signal into a digital image signal, and outputs said digital image signal; and

a plasma display module including a plasma display panel for outputting mages in accordance with said digital image signal received from said analog interface,

said plasma display panel comprising a first substrate facing a viewer, and a second substrate arranged in facing relation to said first substrate,

said first substrate being comprised of

a transparent substrate;

a scanning electrode and a common electrode both formed on said transparent substrate in facing relation to said second substrate; and

a dielectric layer covering said transparent substrate, said scanning electrode and said common electrode therewith,

said second substrate being comprised of

an electrically insulating substrate;

a plurality of data electrodes formed on said electrically insulating substrate;

a plurality of partition walls formed on said electrically insulating substrate; and

a phosphor layer covering said electrically insulating substrate and said data electrodes therewith between adjacent partition walls,

said phosphor layer including at least a blue-phosphor layer composed of phosphor which emits a blue light,

said blue-phosphor layer being composed of a mixture of two or more phosphors each of which emits a blue light and has an initial brightness and variation of brightness with the lapse of time both different from one another.

20. The plasma display unit as set forth in claim 19, wherein said blue-phosphor layer is composed of a mixture of first phosphor which emits a blue light and second phosphor which emits a blue light, said second phosphor having an initial brightness smaller than the same of said first phosphor, and smaller variation of brightness with the lapse of time than the same of said first phosphor.

21. The plasma display unit as set forth in claim 20, wherein said blue-phosphor layer includes said first phosphor in the range of 10 to 90 weight % both inclusive.

22. The plasma display unit as set forth in claim 19, wherein said blue-phosphor layer is composed of a mixture of at least one kind of first phosphor which emits a blue light and includes aluminate having bivalent europium (Eu²⁺), and at least one kind of second phosphor which emits a blue light and includes silicate having bivalent europium (Eu²⁺).

23. The plasma display unit as set forth in claim 22, wherein said blue-phosphor layer includes said first phosphor in the range of 10 to 90 weight % both inclusive.

24. The plasma display unit as set forth in claim 22, wherein said first phosphor is BaMgAl₁₀O₁₇:

Eu²⁺.

25. The plasma display unit as set forth in claim 22, wherein said second phosphor is CaMgSi₂O₆:

Eu²⁺.

26. The plasma display unit as set forth in claim 22, wherein said first phosphor is comprised of BaMgAl₁₀O₁₇:

Eu²⁺ and at least one kind of another phosphor which emits a blue light and includes aluminate having bivalent europium (Eu²⁺).

27. The plasma display unit as set forth in claim 22, wherein said second phosphor is comprised of CaMgSi₂O₆:

Eu²⁺ and at least one kind of another phosphor which emits a blue light and includes silicate having bivalent europium (Eu²⁺).