公开(公告)号：JP2002040987A

公开(公告)日：2002-02-08

申请号：JP2000229274

申请日：2000-07-28

Applicant: NEC CORP

Inventor： MAKINO MITSUYOSHI

IPC: G09G3/20 ,  G09G3/288 ,  G09G3/291 ,  G09G3/292 ,  G09G3/293 ,  G09G3/294 ,  G09G3/296 ,  G09G3/298 ,  G09G3/28

Abstract: PROBLEM TO BE SOLVED: To provide a method for driving a plasma display panel, which deletes operations of preliminary discharge elimination and sustaining elimination, and prevents erroneous discharge caused by elimination failure. SOLUTION: Such a sustained pulse is applied as does not eliminate a 1st wall charge distribution formed by electric discharges of a charge forming pulse, and does not generate sustained discharges on the 1st wall charge distribution. On the other hand, sustained discharges are generated on a 2nd wall charge distribution formed by write discharges. Further, when the sustained discharges are generated, self-elimination discharges are generated at the end of the sustained pulse.

公开(公告)号：JP2001084906A

公开(公告)日：2001-03-30

申请号：JP26170899

申请日：1999-09-16

Applicant: NEC CORP

Inventor： MAKINO MITSUYOSHI

IPC: H01J11/12 ,  H01J11/14 ,  H01J11/22 ,  H01J11/24 ,  H01J11/26 ,  H01J11/32 ,  H01J11/34 ,  H01J11/50 ,  H01J11/00

Abstract: PROBLEM TO BE SOLVED: To improve high definition, while securing emission luminance. SOLUTION: This plasma display device is provided with a front surface substrate and a back surface substrate which are arranged facing each other, plural pairs (electrode pairs) of scanning electrodes and common electrodes which extend on the inner surface of the front surface substrate in approximately the same direction at a distance (a surface discharge distance), and a plurality of data electrodes extending on the inner surface of the back surface substrate at a distance, so as to be approximately perpendicular to the scanning electrodes and the common electrodes, and discharge gas is filled between the substrates. The product of the surface discharge distance by discharge gas pressure is set so as to be lower than the Paschen minimum, less likely the discharge is not generated, the smaller the distance is between the electrodes, and the electrode pairs are arranged thickly to realize high definition. Since the distance between a scanning electrode 12 and a common electrode 13 of different electrode pairs, namely, the sum of the non-discharge distance NDG and the width W of either the scanning electrode 12 or the common electrode 13 is smaller than a surface discharge distance DG, errors in discharging in paths B between mutually adjacent electrode pairs can be prevented.

公开(公告)号：JPH10282926A

公开(公告)日：1998-10-23

申请号：JP8390297

申请日：1997-04-02

Applicant: NEC CORP

Inventor： MAKINO MITSUYOSHI

IPC: H01J17/34 ,  G09G3/288 ,  G09G3/291 ,  G09G3/294 ,  G09G3/298 ,  H01J11/12 ,  H01J11/14 ,  H01J11/24 ,  H01J11/26 ,  H01J11/28 ,  H01J11/36 ,  H01J11/42 ,  H01J17/49 ,  G09G3/28

Abstract: PROBLEM TO BE SOLVED: To improve light emitting efficiency in sustained discharge and to reduce power consumption by setting falling speed of negative pulse voltage causing sustained discharge slower than the specific value. SOLUTION: A pulse having a shape in which the fall rate V/t1 of the voltage is made lower than 100 V/μs as a sustained discharge pulse. When the fall rate V/t1 of the voltage is made small, the light emitting efficiency is increased, and especially, when the fall rate of the voltage is made lower than 100 V/μs, the light emitting efficiency is remarkably increased. For example, when the voltage of a sustained discharge pulse is 150 V and a rectangular pulse having normal fall rate of 100 V/μs or more is used for the sustained discharge pulse, light emitting efficiency is 1.46 lumens/W, but when the fall rate of the voltage is 33 V/μs, the light emitting efficiency is increased to 2.12 lumens/W. This improvement of light emitting efficiency of 45% can reduce power consumption of PDP and can relax heat discharge measure.

公开(公告)号：JPH08179724A

公开(公告)日：1996-07-12

申请号：JP31524094

申请日：1994-12-19

Applicant: NEC CORP

Inventor： MAKINO MITSUYOSHI

IPC: H04N5/66 ,  G09G3/20 ,  G09G3/28 ,  G09G3/2813 ,  G09G3/282 ,  G09G3/288 ,  G09G3/291 ,  G09G3/294 ,  G09G3/296 ,  G09G3/298

Abstract: PURPOSE: To continuously and linearly change the gradation in PDP drive. CONSTITUTION: This method includes a step A2 for setting the respective target value of an emitting luminance corresponding to a gradation level to L1, when only each of sub-fields SF2-SF8 obtained by time-dividing one field of a plasma display panel into eight pieces is selected, and emitting luminances corresponding to gradation levels smaller than the gradation level by 1 and 2 to L2, L3, respectively, and successively determining the target value L1 so as to satisfy L1=L2+(L2-L3) with respect to SF2-SF8; and a step A3 for setting the keeping discharge frequency so that the emitting luminance is the target value L1 when each of SF2-SF8 is selected.

公开(公告)号：JP2002351397A

公开(公告)日：2002-12-06

申请号：JP2001155860

申请日：2001-05-24

Applicant: NEC CORP

Inventor： MAKINO MITSUYOSHI

IPC: H04N5/66 ,  G09G3/20 ,  G09G3/288 ,  G09G3/291 ,  G09G3/292 ,  G09G3/293 ,  G09G3/294 ,  G09G3/298 ,  G09G3/28

Abstract: PROBLEM TO BE SOLVED: To provide a driving method for a plane discharge type AC-PDP in which a stable writing discharge is conducted with a short scanning pulse width without the need of special changes to the panel structure and the driving driver and a high light emitting luminance video display is conducted for a highly precise PDP having a large number of scanning lines. SOLUTION: During the application of scanning pulses, writing discharges are generated for all display cells and charged particles generated by the discharging are supplied to a next scanning line by diffusion. The pulse width of the scanning is made shorter since discharging is generated at high speed and is stably generated when the supply of the charged particles is received and a scanning pulse is applied to the next scanning line. A negative polarity subscanning pulse is applied to a common electrode to generate writing discharge also to the display cells that are not changed to a maintaining discharge.

公开(公告)号：JP2001236036A

公开(公告)日：2001-08-31

申请号：JP2000045013

申请日：2000-02-22

Applicant: NEC CORP

Inventor： MAKINO MITSUYOSHI

IPC: G09G3/20 ,  G09G3/28 ,  G09G3/288 ,  G09G3/291 ,  G09G3/292 ,  G09G3/298

Abstract: PROBLEM TO BE SOLVED: To provide a method for driving an AC type plasma display panel in which the contrast of an image is improved by generating preliminary discharge in the pixel of a display area with a secure and small luminous intensity with a simplified driving circuit. SOLUTION: A first preliminary discharging pulse 22a is applied to the common electrodes of all pixels and a second preliminary discharging pulse 22b is applied only to the first scanning electrode S1 among scanning electrodes 12 S1 to Sm} and the pulse 22b is not applied to other scanning electrodes 12 from the second scanning electrode to the mth scanning electrodes S2 to Sm}. As a result, strong preliminary discharge by a large potential difference in which the first preliminary discharging pulse 22a and the second preliminary discharging pulse 22b are overlapped is generated in the row of pixels of points of intersection of the scanning electrode S1 and the first common electrode C1 and weak preliminary discharge by the potential difference of only the second preliminary discharging pulse 22b is generated in other pixels.

公开(公告)号：JP2000067761A

公开(公告)日：2000-03-03

申请号：JP23056898

申请日：1998-08-17

Applicant: NEC CORP

Inventor： MAKINO MITSUYOSHI ,  YOSHIOKA TOSHIHIRO

IPC: G09G3/20 ,  H01J11/12 ,  H01J11/14 ,  H01J11/22 ,  H01J11/24 ,  H01J11/26 ,  H01J11/28 ,  H01J11/34 ,  H01J11/36 ,  H01J11/38 ,  H01J11/40 ,  H01J11/42 ,  H01J11/50 ,  H01J11/02 ,  H01J11/00

Abstract: PROBLEM TO BE SOLVED: To provide a plasma display panel allowing reduction of each voltage at the time of maintaining discharge erasure, auxiliary discharge, and auxiliary discharge erasure. SOLUTION: This plasma display panel has scanning electrodes 12 of plural row electrodes provided on a front substrate 10 corresponding to display cells Ce; common electrodes A, B next to both sides of each the scanning electrode 12 in a width direction of the scanning electrode 12; a first dielectric layer (15a) covering an area containing a gap D1 between the scanning electrodes 12 and the common electrode A; and a second dielectric layer (15a) covering an area containing a gap D2 between the scanning electrodes 12 and the common electrode B. A thickness of the first dielectric layer (15a) and/or a width of the gap D1 are set smaller than a thickness of the second dielectric layer (15a) and/or a width of the gap D2.

公开(公告)号：JPH11202830A

公开(公告)日：1999-07-30

申请号：JP285598

申请日：1998-01-09

Applicant: NEC CORP

Inventor： MAKINO MITSUYOSHI

IPC: G09G3/20 ,  G09G3/2807 ,  G09G3/288 ,  G09G3/291 ,  G09G3/294 ,  H01J11/12 ,  H01J11/14 ,  H01J11/22 ,  H01J11/24 ,  H01J11/26 ,  H01J11/32 ,  H01J11/34 ,  H01J11/36 ,  H01J11/42 ,  G09G3/28 ,  H01J11/02

Abstract: PROBLEM TO BE SOLVED: To improve the light emission efficiency of maintaining discharging while reducing the power consumption. SOLUTION: In this method for driving the plasma display panel, display cells are arranged in matrix at intersections of common electrodes 33 and data electrodes 19 and writing discharging and maintaining for data are performed for display cells, which are made to illuminate. Here, a display luminance quantity is determined by applying maintaining pulses of frequency higher than υi V/(πd ) between electrodes 19 and 33, where μi is the ion mobility of discharging gas charged in the display cells, V is the maximum value of the applied voltage, and (d) is the distance between the electrodes 19 and 33 where the maintaining discharging is performed.

公开(公告)号：JPH10301529A

公开(公告)日：1998-11-13

申请号：JP11478797

申请日：1997-05-02

Applicant: NEC CORP

Inventor： MAKINO MITSUYOSHI

IPC: G09G3/28 ,  G09G3/288 ,  G09G3/291 ,  G09G3/292 ,  G09G3/296

Abstract: PROBLEM TO BE SOLVED: To improve a display contrast ratio by surely generating preliminary discharge and lowering light emission luminance due to the preliminary discharge. SOLUTION: This drive method is constituted so that gas for discharging is enclosed between opposite substrates respectively formed as electrodes, and a display is performed by controlling light emission according to the discharge generated between the electrodes, and the luminance of the light emission is made to become a high state or a low state according to a falling speed or a rising speed of a voltage for generating the discharge. At this time, before the discharge for performing the display is generated, a prescribed voltage is applied to the prescribed electrode of the electrodes to generate the preliminary discharge. This preliminary discharge is performed by applying a negative polarity pulse with the prescribed voltage, and the voltage falling speed V/t1 of this negative polarity pulse is set so as to become later than 100 volt/ microsecond.

公开(公告)号：JPH10123999A

公开(公告)日：1998-05-15

申请号：JP27819796

申请日：1996-10-21

Applicant: NEC CORP

Inventor： MAKINO MITSUYOSHI ,  YOSHIOKA TOSHIHIRO

IPC: G09G3/20 ,  G09G3/28 ,  G09G3/288 ,  G09G3/291 ,  G09G3/294 ,  G09G3/296 ,  G09G3/298 ,  H01J11/12 ,  H01J11/14 ,  H01J11/24 ,  H01J11/26 ,  H01J11/28 ,  H01J11/32 ,  H01J11/34 ,  H01J11/42 ,  H01J11/46 ,  H04N9/30 ,  H01J11/00

Abstract: PROBLEM TO BE SOLVED: To induce an adequate writing discharge over the entire part of a display screen so that well color-balanced display is executed by controlling the writing discharge and maintenance discharge of three kinds of unit discharge spaces which emit light to any one color among R, G and B independently for every unit discharge space varying in light emission colors. SOLUTION: Pixels R, G and B line up in the direction along data electrodes 19 and the pixels of the same light emission colors line up to each other in the directions along the same scanning electrodes 12a to 12c. Namely, the unit discharge spaces coated with phosphors of the same light emission colors are formed to line up in the directions along the same scanning electrodes 12a to 12c. The plural scanning electrodes 12 which apply scanning pulses on the pixels of the same light emission colors are rearranged to one group. These electrode groups are connected to R, G, B scanning drivers 4a to 4c disposed at every light emission color. Then, even if the optimum writing pulse conditions vary with every phosphor, the adequate writing may be executed on all the pixels by adjusting the output conditions from the respective scanning drivers 4a to 4c.