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    DRIVING DEVICE FOR GAS DISCHARGE TYPE DISPLAY DEVICE
    24.
    发明专利
    DRIVING DEVICE FOR GAS DISCHARGE TYPE DISPLAY DEVICE 失效

    公开(公告)号：JPH08314406A

    公开(公告)日：1996-11-29

    申请号：JP11866095

    申请日：1995-05-17

    Applicant: MATSUSHITA ELECTRONICS CORP

    Inventor： ITO KOJI ,  MAE HAJIME ,  MATSUI YASUSHI

    IPC: G09G3/282 ,  G09G3/20 ,  G09G3/296 ,  G09G3/28

    Abstract: PURPOSE: To reduce the cost and power consumption of a driving device for a gas discharge type display device. CONSTITUTION: Semiconductor switches 61 -6N are connected between each cathode K1 -KN and a common line X0 , the common line X0 is driven by a push-pull circuit 1 consisting of semiconductor switches FP, FN, and a power collection circuit 4 is connected to the common line X0 . A semiconductor switch FP is turned on only in the last and short period of a driving period TP for each cathode K1 -KN, and a semiconductor switch FN is turned on two times in a off period of the semiconductor switch FP in a driving period TP. When a scanning pulse voltage is applied, semiconductor switches 61 -6N are turned on in an previous ON period of the semiconductor switch FN, when holding pulse voltage is applied, semiconductor switches 61 -6N are turned on in an ON period succeeding the semiconductor switch FN and an OFF period before and after it, power collection operation is performed by the power collection circuit 4 in a period when the semiconductor switch FP is turned off and the semiconductor switch FN is turned off.

    GAS EMISSION TYPE DISPLAY DEVICE, AND ITS DRIVING METHOD
    25.
    发明专利
    GAS EMISSION TYPE DISPLAY DEVICE, AND ITS DRIVING METHOD 失效

    公开(公告)号：JPH08190870A

    公开(公告)日：1996-07-23

    申请号：JP22421195

    申请日：1995-08-31

    Applicant: MATSUSHITA ELECTRONICS CORP

    Inventor： SHINO TAICHI ,  MAE HAJIME ,  HIRAO KAZUNORI ,  ITO KOJI ,  KOSUGI NAOTAKA

    IPC: H01J17/10 ,  G09G3/282 ,  G09G3/291 ,  G09G3/293 ,  G09G3/294 ,  H01J17/49 ,  G09G3/28

    Abstract: PURPOSE: To dispense with an auxiliary discharge cell to simplify the structure of a device, reduce the power consumption, improve the efficiency, and enhance the luminance by three-dimensionally wiring an anode, a cathode and an address electrode in matrix. CONSTITUTION: An address electrode 22 on the lower surface of an insulating substrate 21 is provided to form a plural column arrangement, an anode 24 is provided to form a plural row arrangement, and arranged orthogonally to the electrode 22 in grade separation form. A cathode 27 on a light transmitting glass substrate 25, is aligned in parallel to the anode 24 every aggregate of row unit connected to the same cathode bus line 28 to form a plural row arrangement as the whole. In the drive of a device, a writing discharge is first performed between the electrode 22 and the anode 24 arranged in grade separation form to store the display content, and a keeping discharge is then performed between the anode 24 and the cathode 27 to perform a display emission. Thus, an auxiliary discharge cell is dispensed with to simplify the structure of the device, the screen is highly made fine, the manufacturing efficiency is improved, and the cost can be also reduced.

    DISCHARGE TUBE DRIVING DEVICE FOR DISPLAY
    27.
    发明专利
    DISCHARGE TUBE DRIVING DEVICE FOR DISPLAY 失效

    公开(公告)号：JPH02106794A

    公开(公告)日：1990-04-18

    申请号：JP26083488

    申请日：1988-10-17

    Applicant: MATSUSHITA ELECTRONICS CORP

    Inventor： OKAMOTO TAKIO ,  ITSUDA KOICHI ,  ITO KOJI

    IPC: G09G3/28 ,  G09G3/296

    Abstract: PURPOSE:To control discharge current as well as to reduce the electric power consumption of a driving device and to allow POG (package on glass) while eliminating the need for an anode resistor of a high resistance value for limiting the discharge current by providing a constant current output circuit which compares the output of a logical circuit for display with a reference power source output. CONSTITUTION:The constant current output circuit 19 and the anode resistor 20 are connected to the electric lines from the logical circuit 9 for display to the respective anodes 4a, 4b... of a discharge tube for display. The constant current output circuit 19 has the function to form the constant current by as much as to control the discharge current. The anode resistor 20 is merely used for protecting the constant current output circuit 19 and is, therefore, required to be much smaller than the conventional anode resistor. The electric power consumption by the anode resistor is drastically reduced in this way and the direct packaging of integrated circuit elements for driving, etc., on a flat glass plate is possible. The POG is thus possible.

    DRIVING METHOD AND DRIVING CIRCUIT FOR GAS DISCHARGE TYPE DISPLAY DEVICE
    28.
    发明专利
    DRIVING METHOD AND DRIVING CIRCUIT FOR GAS DISCHARGE TYPE DISPLAY DEVICE 失效

    公开(公告)号：JPH0950257A

    公开(公告)日：1997-02-18

    申请号：JP19992495

    申请日：1995-08-04

    Applicant: MATSUSHITA ELECTRONICS CORP

    Inventor： ITSUDA KOICHI ,  ITO KOJI

    IPC: G09G3/291 ,  G09G3/294 ,  G09G3/296 ,  H01J11/12 ,  H01J11/20 ,  H01J11/24 ,  H01J11/26 ,  H01J11/28 ,  H01J11/36 ,  H01J11/38 ,  H01J11/42 ,  G09G3/28 ,  H01J11/00 ,  H01J11/02

    Abstract: PROBLEM TO BE SOLVED: To reduce the means power loss in a fixed period due to base current by changing over the base current to be applied to driving transistors of a gas discharge type display device among plural kinds of values. SOLUTION: Base current changeover circuit 602a1∼602a64 are respectively connected to the bases of transistors Ga1∼Qa64. The base current changeover circuits 602a1∼602a64 are constituted so as to be able to change over base current to three kinds of values according to a base current changeover signal Sa and an ON timing signal Saon. That is, the base current is changed over among three kinds of values consisting of a first base current value for flowing prescribed output currents in transistors for dryings Ga1∼Qa64, a second base current value for making transistors for drivings Ga1∼Qa64 OFF-states and a third base current value being a value smaller than the first base current value and for making transisors for drivings Ga1∼Qa64 ON-states.

    DRIVING METHOD OF GAS DISCHARGE TYPE DISPLAY DEVICE
    29.
    发明专利
    DRIVING METHOD OF GAS DISCHARGE TYPE DISPLAY DEVICE 失效

    公开(公告)号：JPH08212930A

    公开(公告)日：1996-08-20

    申请号：JP2176095

    申请日：1995-02-09

    Applicant: MATSUSHITA ELECTRONICS CORP

    Inventor： ITO KOJI ,  ITSUDA KOICHI

    IPC: G09G3/20 ,  G09G3/288 ,  G09G3/291 ,  G09G3/292 ,  G09G3/294 ,  G09G3/296 ,  G09G3/298 ,  H01J11/12 ,  H01J11/24 ,  H01J11/26 ,  H01J11/28 ,  H01J11/42 ,  H01J11/00 ,  G09G3/28

    Abstract: PURPOSE: To provide a method of driving an AC type plasma display panel whereby a riseup time of display at starting is shortened, while preventing generation of a discharge cell unlighted. CONSTITUTION: In addition to a writing period, maintaining period and an erasing period, a newly initialized period is provided, so as to apply, in this period, an initialized pulse, which is a pulse of reverse polarity to a scanning pulse applied to scanning electrodes SCN1 to SCNN, to the scanning electrodes SCN1 to SCNN and maintaining electrodes SUS1 to SUSN. By providing the initialized period before the writing period, a wall charge left after ending the erasing period can be completely neutralized by discharging with the initialized pulse before the writing period, to return to a condition with the wall charge not accumulated. Even when an initial condition before carrying a current is placed in a condition with the wall charge deviated, by providing the initialized period before the writing period, the wall charge can be completely neutralized by discharging with the initialized pulse, to return to a condition without accumulating the wall charge.

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