Fluid applying apparatus and method, and plasma display panel
AssigneePanasonic Corporation
InventorsTeruo Maruyama, Takashi Sonoda, Yoshimasa Takii
Life of this patent
Estimating the term…
Abstract
A meniscus of applying fluid is controlled by applying a voltage to a discharge-nozzle side electrode and a counter electrode placed downstream of the discharge nozzle and by increasing or decreasing fluid pressure inside a pump chamber with use of a mechanism for rotational motion or rectilinear motion.
Claims27
A fluid applying apparatus comprising:
- a housing having a suction port for sucking an applying fluid and a discharge port for discharging the applying fluid;
- a moving member which forms a pump chamber for the applying fluid in combination with the housing and which is enabled to make rotational motion or rectilinear motion relative to the housing;
- a moving-member driving device for driving the moving member to make the housing perform the rotational motion or rectilinear motion so that applying-fluid pressure inside the pump chamber is increased or reduced;
- a housing-side electrode placed on the housing;
- and
- a power supply for applying a voltage to the housing-side electrode.
A fluid applying method comprising:
- driving a moving member which is capable of making rotational motion or rectilinear motion relative to a housing to put the moving member into rotational motion or rectilinear motion relative to the housing, and thus, increasing or decreasing an applying-fluid pressure inside an applying-fluid pump chamber defined between the housing and the moving member, whereby the applying fluid is sucked through a suction port of the housing into the pump chamber, and discharged and applied through a discharge port of the housing onto a substrate which is an application object placed on an opposing surface of the discharge port;
- applying a voltage to a housing-side electrode placed in proximity to at least the discharge port of the housing to form an electric field between the housing-side electrode and the substrate;
- and
- controlling a suction force for the applying fluid at the discharge port with a negative pressure generated by pressure-reducing the pump chamber by the rotational motion or rectilinear motion, and a force of making the applying fluid projected at the discharge port by an electric field formed by applying a voltage to the housing-side electrode, whereby the application is stopped when the force of making the applying fluid projected for applying the applying fluid becomes smaller than the suction force for the applying fluid.
A pattern formation method for plasma display panels, comprising:
- driving a moving member capable of making rotational motion or rectilinear motion relative to a housing to put the moving member into rotational motion or rectilinear motion relative to the housing, and thus, increasing or decreasing a paste pressure in a pump chamber of a paste as an applying fluid defined between the housing and the moving member, whereby the paste is sucked through a suction port of the housing into the pump chamber, and discharged through the discharge port of the housing onto a PDP substrate, which is an application object, placed at an opposing surface of the discharge port, thereby applying and forming an application line, so that a paste layer is formed into a pattern;
- performing the formation of this paste layer while applying a voltage to a housing-side electrode placed in proximity to at least the discharge port of the housing to form an electric field between the housing-side electrode and a PDP substrate, within an effective display area of the PDP substrate and/or within terminal portions neighboring the effective display area;
- thereafter, controlling a suction force for the paste at the discharge port with a negative pressure generated by pressure-reducing the pump chamber by the rotational motion or rectilinear motion, and a force of making the paste projected at the discharge port by an electric field formed by applying a voltage to the housing-side electrode, whereby the application is stopped when the force of making the paste projected for applying the paste becomes smaller than the suction force for the paste.
A plasma display panel having main electrode lines formed in a plural number and parallel to one another in an effective display area of a PDP front-face plate, and terminal-portion electrode lines formed so as to be connected to the main electrode lines and inclined with respect to the main electrode lines in terminal portions neighboring this effective display area, wherein given a pitch P between the main electrode lines and a distance ΔP of a portion of a terminal end of the terminal-portion electrode line projecting from the main electrode line, it holds that (ΔP/P)<(1/3).
A plasma display panel having main electrode lines formed in a plural number and parallel to one another in an effective display area of a PDP front-face plate, and terminal-portion electrode lines formed so as to be connected to the main electrode lines and inclined with respect to the main electrode lines in terminal portions neighboring this effective display area, wherein given a pitch P between the terminal-portion electrode lines and a distance ΔP of a portion of a terminal end of the main electrode line projecting from the terminal-portion electrode line, it holds that (ΔP/P)<(1/3).
Dependencies are inferred from the claim text.