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AssigneeFutaba Corporation
InventorsYukihiko Shimizu, Satoshi Yamaguchi, Yoichi Kobori, Masao Saito, Kinya Ueda
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A fluorescent print head driving method is provided wherein an operational lifetime is improved by reducing the evaporation amount of Ba contained in an electron emitter material of a filament cathode and suppressing the deterioration of the luminous efficiency. In the pre-luminous period T1 during which luminous dots glow before forming an image on a recording medium, a grid voltage is controlled to be a predetermined voltage of a rated value or less and a filament voltage is controlled to a predetermined voltage of a rated value or less. In the print luminous period T2 during which luminous dots glow before forming an image on a recording medium, a grid voltage blank period is created corresponding to a luminous blank period between glow states during which an anode voltage is written for one line on the recording medium. The anode voltage and the grid voltage are controlled to be a rated voltage with a duty ratio corresponding to a blank period. Thus, the filament voltage is controlled to be a predetermined voltage of a rated value or less.
A method of driving a fluorescent print head, said fluorescent print head having a filament cathode, a control electrode for controlling electrons emitted from said filament cathode, a fluorescent substance layer having a plurality of luminous dots each which emits light when electrons emitted from said filament cathode impinges against said fluorescent substance layer, and an anode on which said fluorescent substance layer is coated, wherein a pre-luminous period during which said luminous dots glow before an image is formed on a recording medium and a print luminous period during which said luminous dots glow to create an image on said recording medium are provided, said method comprising the steps of:
A method of driving a fluorescent print head, said fluorescent print head having a filament cathode, a control electrode for controlling electrons emitted from said filament cathode, a fluorescent substance layer having a plurality of luminous dots each which emits light when electrons emitted from said filament cathode impinges against said fluorescent substance layer, and an anode on which said fluorescent substance layer is coated, wherein a pre-luminous period during which said luminous dots glow before an image is formed on a recording medium and a print luminous period during which said luminous dots glow to create an image on said recording medium are provided, said method comprising the steps of:
A method of driving a fluorescent print head, said fluorescent print head having a filament cathode, a control electrode for controlling electrons emitted from said filament cathode, a fluorescent substance layer having a plurality of luminous dots each which emits light when electrons emitted from said filament cathode impinges against said fluorescent substance layer, and an anode on which said fluorescent substance layer is coated, wherein a pre-luminous period during which said luminous dots glow before an image is formed on a recording medium and a print luminous period during which said luminous dots glow to create an image on said recording medium are provided, said method comprising the steps of:
A method of driving a fluorescent print head, said fluorescent print head having a filament cathode, a control electrode for controlling electrons emitted from said filament cathode, a fluorescent substance layer having a plurality of luminous dots each which emits light when electrons emitted from said filament cathode impinges against said fluorescent substance layer, and an anode on which said fluorescent substance layer is coated, wherein a blank period of a grid voltage applied to said control electrode corresponding to the blank period between glow states during which an anode voltage to be applied to said anode is written for each line of a recording medium is provided, said method comprising the steps of:
A method of driving a fluorescent print head, said fluorescent print head having a filament cathode, a fluorescent substance layer having a plurality of luminous dots each which emits light when electrons emitted from said filament cathode impinges against said fluorescent substance layer, and an anode on which said fluorescent substance layer is coated, wherein a pre-luminous period during which said luminous dots glow before an image is formed on a recording medium and a print luminous period during which said luminous dots glow to create an image on said recording medium are provided, said method comprising the steps of:
A method of driving a fluorescent print head, said fluorescent print head having a filament cathode, a fluorescent substance layer having a plurality of luminous dots each which emits light when electrons emitted from said filament cathode impinges against said fluorescent substance layer, and an anode on which said fluorescent substance layer is coated, wherein a pre-luminous period during which said luminous dots glow before an image is formed on a recording medium and a print luminous period during which said luminous dots glow to create an image on said recording medium are provided, said method comprising the steps of:
An image forming apparatus comprising:
Dependencies are inferred from the claim text.