Noritsu Koki Co., Ltd.

Other

Hiromichi Morishima

Shigetaka Nakamura

Hidekazu Tsuji

Yukihiko Shimizu

Kinya Ueda

Masao Saito

Toshiaki Nakahara

Toshihiro Yamasaki

A method of testing light-emitting condition of a vacuum florescent print head is disclosed. The print head is of a type having a plurality of luminous elements disposed along a main scanning direction for forming dots in the form of a linear column on a print paper, and the print head is movable in a sub-scanning direction relative to the print paper. The method includes a first step of exposing and forming on a print paper a plurality of linear dot columns, each column consisting of a plurality of dots arranged along a main scanning direction with a predetermined space therebetween, the plurality of dot columns being juxtaposed with each other with a predetermined space therebetween; a second step of determining density of each dot formed and exposed by the first step one column after another by using a scanner; and a third step of outputting the determined densities of the respective dots as light-emitting amounts of a plurality of luminous elements forming the linear dot column.

Method of testing light-emitting condition of vacuum fluorescent print head

A vacuum fluorescent printer including a print head (,) having luminous blocks (,) each having a plurality of luminous elements arranged in a main scanning direction for irradiating a photosensitive material with light released from phosphorous objects to which electrons are applied based on a drive signal, thereby forming dots on the photosensitive material. A further luminous block (,) is provided which is spaced from the luminous blocks (,) in the sub-scanning direction and used for printing a particular color among the three colors (R, G, B). Each dot of the particular color is formed by light from a plurality of luminous blocks (,). A printer controller (,) is provided for generating a pulsed drive signal as the drive signal. The number of pulses in the drive signal is determined based on a density value of the image data, and the slower a moving speed is in the sub-scanning direction, to the larger pulse width the drive signal is set.

Vacuum fluorescent printer

A vacuum fluorescent print head (,) for photographic printing paper having luminous elements with phosphorous objects (,) arranged linearly in a main scanning direction to form a plurality of luminous element arrays (,) arranged in a sub-scanning direction at right angles to the main scanning direction. The luminous elements (,) of the luminous element arrays (,) are arranged at predetermined intervals, and the luminous element arrays are arranged relative to one another, such that light beams radiating from the luminous elements of one of the luminous element arrays and from the luminous elements of another of luminous element arrays lie close to one another without overlapping in the sub-scanning direction.

Digital exposure apparatus

A vacuum fluorescent color print head for photographic printing paper having a red luminous block (,) including a plurality of luminous elements arranged in a main scanning direction, and red color filters attached to light-emitting ends of the luminous elements; a green luminous block (,) including a plurality of luminous elements arranged in the main scanning direction, and green color filters attached to light-emitting ends of the luminous elements, and a blue luminous block (,) including a plurality of luminous elements arranged in the main scanning direction, and blue color filters attached to light-emitting ends of the luminous elements. The color filters (,) are attached to the light-emitting ends of the luminous elements defined by phosphorous object (,) formed of ZnO:Zn phosphor, and part of a first strip-like anode conductor (,) or a second strip-like anode conductor (,). The color filters have transmission characteristics matching sensitivity characteristics of the printing paper (,) with respect to colors to be transmitted.

Vacuum fluorescent color print head for photographic printing paper

A vacuum fluorescent printer including a print head (,) having luminous blocks (,) each having a plurality of luminous elements arranged in a main scanning direction for irradiating a photosensitive material with light released from phosphorous objects to which electrons are applied based on a drive signal, thereby forming dots on the photosensitive material. A further luminous block (,) is provided which is spaced from the luminous blocks (,) in the sub-scanning direction and used for printing a particular color among the three colors (R, G, B) Each dot of the particular color is formed by light from a plurality of luminous blocks (,). A printer controller (,) is provided for generating a pulsed drive signal as the drive signal. The number of pulses in the drive signal is determined based on a density value of the image data, and the slower a moving speed is in the sub-scanning direction, to the larger pulse width the drive signal is set.

A printer head capable of increasing intensity of dot-like light irradiated onto a record medium without requiring to increase a drive voltage or the number of printer heads arranged. The optical printer head includes a luminous element including two luminous dot arrays arranged in parallel to each other at a predetermined interval in a sub-scanning direction. The luminous dot arrays each are constituted of a plurality of luminous dots which have a dimension in the sub-scanning direction increased by a predetermined magnification as compared with that in a main scanning direction and are spaced from each other at identical intervals in the main scanning direction. The luminous dots of the two luminous dot arrays are arranged in an offset manner while being deviated from each other in the main scanning direction by a distance equal to the dimension thereof in the main scanning direction. Also, a reduction optical system is arranged for carrying out irradiation of light emitted from the luminous dots while reducing a dimension of the light in the sub-scanning direction by a reciprocal of the predetermined magnification.

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Wakayama, Japan

Hiromichi Morishima