Plasma display device and production thereof
A plasma and display device technology, which is applied in the direction of AC plasma display panels, cold cathode manufacturing, electrode system manufacturing, etc., can solve the problems of clogged coating, brightness drop, unevenness, etc.
Inactive Publication Date: 2004-06-30
PANASONIC CORP
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[0010] In order to make the surface negatively charged Zn 2 SiO 4 : Mn is positively charged, and a method of laminating and coating a positively charged oxide with a certain thickness (0.1wt% to 0.5wt%) is considered (Japanese Patent Laid-Open No. 11-86735) or a positively charged green A method of mixing phosphors to make them positively charged (JP-A-2001-236893), but if lamination coating of more than 0.1 wt% is performed, the brightness will decrease, and when two phosphors with different charging states are applied , also prone to problems such as clogging or uneven coating
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[0019] Zn used in PDP 2 SiO 4 : Mn green phosphor is manufactured by solid state reaction method, but in order to improve brightness, it is made of SiO 2 Manufactured at a composition higher than the stoichiometric ratio, therefore in the Zn 2 SiO 4 : The surface of Mn crystal is covered with SiO 2 covered state. Even in the case of stoichiometric production, SiO will precipitate on the surface of the phosphor if fired at a temperature above 1100°C 2 , therefore, Zn 2 SiO 4 : The surface charge of Mn is negative, which is different from the positive charge of green phosphors and red phosphors, so the discharge characteristics may be poor.
[0020] And if there is negatively charged SiO on the surface 2 , the negatively charged ethyl cellulose in the solution is difficult to adsorb on Zn 2 SiO 4 Therefore, when the phosphor is applied while ink is ejected from the nozzle, the ethyl cellulose in the tank of the coating device is easily separated from the phosphor, and ...
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Abstract
A method of manufacturing a plasma display device which prevents the brightness of a phosphor layer from lowering is disclosed, and the method can form the phosphor layer in a stable manner because a nozzle is free from clogging. At least one of the phosphor layers has a green phosphor layer containing green phosphor having zero or positive charges and a crystal structure of Zn2SiO4:Mn. Green phosphor ink, of which major ingredient is the green phosphor, is applied through the nozzle to discharging cells, thereby forming the green phosphor layer. The green phosphor ink is formed of green phosphor powder coated with oxide having positive charges, or the ink is formed by crushing the green phosphor powder originally having negative charges and a crystal structure of Zn2SiO4:Mn such that the powder changes to have positive charges.
Description
[0001] technology area [0002] The present invention relates to a plasma display device having a phosphor layer that emits light excited by ultraviolet rays and a method for manufacturing the same. Background technique [0003] In recent years, among color display devices using image display such as computers and televisions, display devices using plasma display panels (hereinafter referred to as PDPs) have attracted attention as color display devices that can realize thinness and light weight under large sizes. Attention. [0004] The PDP displays colors by additive mixing of the so-called three primary colors (red, green, and blue). In order to perform full-color display, phosphor layers capable of emitting light of the three primary colors red (R), green (G) and blue (B) are installed in the PDP, and the phosphor particles constituting these phosphor layers are Excited by the ultraviolet rays generated in the discharge chamber, visible light of various colors is emitted....
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IPC IPC(8): H01J9/22C09C1/00C09C3/04C09C3/06C09D11/00C09D11/322C09K11/02C09K11/08C09K11/59H01J9/227H01J11/12H01J11/22H01J11/24H01J11/26H01J11/34H01J11/42
CPCC09K11/7787H01J2211/42C09D11/50H01J9/227C09K11/02C09D11/30C09K11/595C09K11/7734C09K11/7797C09K11/025C09D11/322H01J9/22H01J11/42C09K11/59C09K11/08
Inventor 河村浩幸大谷光弘青木正树杉本和彦日比野纯一
Owner PANASONIC CORP