WO2013168327A1 - Dispositif d'affichage à écrans multiples, procédé de pilotage d'un dispositif d'affichage à écrans multiples et système d'affichage à écrans multiples - Google Patents

Dispositif d'affichage à écrans multiples, procédé de pilotage d'un dispositif d'affichage à écrans multiples et système d'affichage à écrans multiples Download PDF

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Publication number
WO2013168327A1
WO2013168327A1 PCT/JP2013/001382 JP2013001382W WO2013168327A1 WO 2013168327 A1 WO2013168327 A1 WO 2013168327A1 JP 2013001382 W JP2013001382 W JP 2013001382W WO 2013168327 A1 WO2013168327 A1 WO 2013168327A1
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Prior art keywords
coordinate detection
image display
display device
subfield
coordinate
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PCT/JP2013/001382
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English (en)
Japanese (ja)
Inventor
貴彦 折口
井上　真一
剛 桑山
一朗 坂田
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パナソニック株式会社
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Publication of WO2013168327A1 publication Critical patent/WO2013168327A1/fr

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
    • G06F3/1423—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display
    • G06F3/1438—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display using more than one graphics controller
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
    • G06F3/1423—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display
    • G06F3/1431—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display using a single graphics controller
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
    • G06F3/1423—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display
    • G06F3/1446—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display display composed of modules, e.g. video walls
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2007—Display of intermediate tones
    • G09G3/2018—Display of intermediate tones by time modulation using two or more time intervals
    • G09G3/2022—Display of intermediate tones by time modulation using two or more time intervals using sub-frames
    • G09G3/2025—Display of intermediate tones by time modulation using two or more time intervals using sub-frames the sub-frames having all the same time duration
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2007—Display of intermediate tones
    • G09G3/2018—Display of intermediate tones by time modulation using two or more time intervals
    • G09G3/2022—Display of intermediate tones by time modulation using two or more time intervals using sub-frames
    • G09G3/204—Display of intermediate tones by time modulation using two or more time intervals using sub-frames the sub-frames being organized in consecutive sub-frame groups
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/28—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
    • G09G3/288—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/28—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
    • G09G3/288—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels
    • G09G3/291—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes
    • G09G3/294—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes for lighting or sustain discharge
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/02—Composition of display devices
    • G09G2300/026—Video wall, i.e. juxtaposition of a plurality of screens to create a display screen of bigger dimensions
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0421—Structural details of the set of electrodes
    • G09G2300/0426—Layout of electrodes and connections
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/08—Details of timing specific for flat panels, other than clock recovery

Definitions

  • the present invention relates to a multi-screen display device composed of a plurality of image display devices, a multi-screen display system capable of inputting characters and drawings by handwriting on the multi-screen display device using a light pen, and a driving method of the multi-screen display device. .
  • a plasma display panel (hereinafter abbreviated as “panel”) is a typical image display device that displays an image in an image display area by combining binary control of light emission and non-light emission in each of a plurality of light emitting elements constituting a pixel. There is).
  • a large number of discharge cells which are light-emitting elements constituting pixels, are formed between a front substrate and a rear substrate that are arranged to face each other.
  • the front substrate a plurality of pairs of display electrodes composed of a pair of scan electrodes and sustain electrodes are formed in parallel with each other on the front glass substrate.
  • the back substrate has a plurality of parallel data electrodes formed on a glass substrate on the back side.
  • Each discharge cell is coated with one of red (R), green (G), and blue (B) phosphors, and a discharge gas is enclosed therein.
  • R red
  • G green
  • B blue
  • an ultraviolet ray is generated by causing a gas discharge, and the phosphor is excited to emit light by the ultraviolet ray.
  • a subfield method is generally used as a method of displaying an image in an image display area of a panel by combining binary control of light emission and non-light emission in a light emitting element.
  • each discharge cell In the subfield method, one field is divided into a plurality of subfields having different emission luminances.
  • each discharge cell light emission / non-light emission of each subfield is controlled by a combination according to the gradation value to be displayed.
  • each discharge cell emits light with brightness corresponding to the gradation value to be displayed, and a color image composed of various combinations of gradation values is displayed in the image display area of the panel.
  • Some of such image display apparatuses have a function that allows a handwritten input of characters and drawings on the image display surface of the panel using a pointing device called “light pen”.
  • position coordinates In order to realize a handwriting input function using a light pen, a technique for detecting the position of the light pen in an image display area is disclosed.
  • position coordinates the coordinates representing the position of the light pen in the image display area.
  • a plasma display device that detects a position coordinate of a light pen by providing a coordinate detection period in one field only when the light pen is used is disclosed (for example, see Patent Document 1).
  • a multi-screen display device configured by combining a plurality of image display devices so that the image display surfaces are arranged on the same plane is disclosed (for example, see Patent Document 2).
  • each image display device constituting the multi-screen display device is referred to as a “partial image display device”.
  • a multi-screen display device having a handwriting input function using a light pen can be configured.
  • a multi-screen display device includes a plurality of partial image display devices including an image display unit having a plurality of electrodes extending in an x coordinate direction that is a row direction and a plurality of electrodes extending in a y coordinate direction that is a column direction. Are arranged in a matrix.
  • Each of the partial image display devices generates a display device identification subfield, a y coordinate detection subfield, and an x coordinate detection subfield.
  • a y-coordinate detection pattern for moving the first emission line extended in the x-coordinate direction in the y-coordinate direction is displayed on the image display unit.
  • an x-coordinate detection pattern for moving the second emission line extended in the y-coordinate direction in the x-coordinate direction is displayed on the image display unit. Then, in the two partial image display devices arranged adjacent to each other, the moving direction of the first emission line or the x coordinate detection when displaying the y coordinate detection pattern on the image display unit in the y coordinate detection subfield is detected.
  • One of the moving directions of the second light emission lines when displaying the x-coordinate detection pattern on the image display unit in the subfield is opposite to each other.
  • the partial image display device arranged in the odd-numbered row and the partial image display device arranged in the even-numbered row include y in the image display unit in the y-coordinate detection subfield.
  • the moving directions of the first light-emitting lines when displaying the coordinate detection pattern are opposite to each other, and the partial image display devices arranged in the odd-numbered columns and the partial image display devices arranged in the even-numbered columns.
  • the movement directions of the second light emission lines when the x coordinate detection pattern is displayed on the image display unit may be opposite to each other.
  • FIG. 1 is a schematic diagram of a multi-screen display system according to an embodiment of the present invention.
  • FIG. 2 is an exploded perspective view showing an example of the structure of the panel used in the plasma display device in accordance with the exemplary embodiment of the present invention.
  • FIG. 3 is a diagram showing an example of the electrode arrangement of the panel used in the plasma display device in accordance with the exemplary embodiment of the present invention.
  • FIG. 4 schematically shows an example of a drive voltage waveform applied to each electrode of the panel in subfields SF1 to SF3 of the image display subfield in the embodiment of the present invention.
  • FIG. 5 is a diagram schematically showing a first example of a drive voltage waveform applied to each electrode of the panel in the coordinate detection subfield according to the embodiment of the present invention.
  • FIG. 1 is a schematic diagram of a multi-screen display system according to an embodiment of the present invention.
  • FIG. 2 is an exploded perspective view showing an example of the structure of the panel used in the plasma display device in accordance with the
  • FIG. 6 is a diagram schematically showing a second example of the drive voltage waveform applied to each electrode of the panel in the coordinate detection subfield in the embodiment of the present invention.
  • FIG. 7 is a diagram schematically showing a third example of the drive voltage waveform applied to each electrode of the panel in the coordinate detection subfield in the embodiment of the present invention.
  • FIG. 8 is a diagram schematically showing a fourth example of the drive voltage waveform applied to each electrode of the panel in the coordinate detection subfield according to the embodiment of the present invention.
  • FIG. 9 is a diagram schematically showing a configuration example of the multi-screen display system in the embodiment of the present invention.
  • FIG. 10 is a diagram schematically showing an example of each circuit block of the plasma display device constituting the multi-screen display device in the embodiment of the present invention.
  • FIG. 11 is a circuit diagram schematically showing a configuration example of a scan electrode driving circuit of the plasma display device in accordance with the exemplary embodiment of the present invention.
  • FIG. 12 is a circuit diagram schematically showing a configuration example of the sustain electrode driving circuit of the plasma display device in accordance with the exemplary embodiment of the present invention.
  • FIG. 13 is a circuit diagram schematically showing a configuration example of the data electrode driving circuit of the plasma display device in accordance with the exemplary embodiment of the present invention.
  • FIG. 14 is a diagram schematically showing an example of a drive voltage waveform when the position coordinates of the light pen are detected in the multi-screen display system in the embodiment of the present invention.
  • FIG. 12 is a circuit diagram schematically showing a configuration example of the sustain electrode driving circuit of the plasma display device in accordance with the exemplary embodiment of the present invention.
  • FIG. 13 is a circuit diagram schematically showing a configuration example of the data electrode driving circuit of the plasma display device in accordance with the exemplary embodiment of the present invention.
  • FIG. 15 is a diagram schematically showing an example of the operation when detecting the position coordinates of the light pen in the multi-screen display system in the embodiment of the present invention.
  • FIG. 16 is a diagram schematically illustrating an example of an operation when performing handwriting input with a light pen in the multi-screen display system according to the embodiment of the present invention.
  • FIG. 1 is a schematic diagram of a multi-screen display system 100 according to an embodiment of the present invention.
  • the multi-screen display system 100 includes a multi-screen display device 130 in which a plurality of partial image display devices are housed in a single housing and a plurality (or a single) light pen 50.
  • a multi-screen display device 130 in which a plurality of partial image display devices are housed in a single housing and a plurality (or a single) light pen 50.
  • the partial image display device is a plasma display device 30 and the image display unit of the partial image display device is a plasma display panel will be described.
  • the partial image display device is limited to the plasma display device 30. It is not a thing.
  • the multi-screen display system 100 shown in FIG. 1 includes three light pens 50a, 50b, and 50c having the same structure, and can be used simultaneously by three users.
  • the light pen 50 is a general term for the light pens 50a, 50b, and 50c.
  • the number of plasma display devices 30 constituting the multi-screen display device 130 is not limited to four, and the number of light pens 50 included in the multi-screen display system 100 is not limited to three.
  • the multi-screen display device 130 arranges the plurality of plasma display devices 30 in a matrix of N rows and M columns so that the image display surfaces are arranged on the same plane.
  • One of N and M is an integer of 1 or more, and the other is an integer of 2 or more. That is, the multi-screen display device 130 includes the plasma display device 30 arranged in a matrix of 1 row and 2 columns or more, or 2 rows and 1 column or more.
  • FIG. 1 shows an example in which four plasma display devices 30a, 30b, 30c, and 30d are arranged in a matrix of 2 rows and 2 columns and one image display surface is configured in a pseudo manner by four image display surfaces. . Therefore, the multi-screen display device 130 shown in FIG. 1 can divide one image into four and display one image on four image display surfaces.
  • the four plasma display devices 30a, 30b, 30c, and 30d shown in FIG. 1 have the same structure, and the drive voltage waveform generated in the image display subfield is the same except for the difference based on the image signal to be displayed. It is. Therefore, the structure of the panel 10 described below with reference to FIGS. 2 and 3 and the drive voltage waveform of the image display subfield described with reference to FIG. 4 are common to the plasma display devices 30a, 30b, 30c, and 30d. However, as will be described later, the driving voltage waveforms generated in the coordinate detection subfield are different from each other in the plasma display devices 30a, 30b, 30c, and 30d.
  • FIG. 2 is an exploded perspective view showing an example of the structure of panel 10 used in plasma display device 30 in accordance with the exemplary embodiment of the present invention.
  • a plurality of display electrode pairs 14 each including a scanning electrode 12 and a sustaining electrode 13 are formed on a glass front substrate 11.
  • a dielectric layer 15 is formed so as to cover the display electrode pair 14, and a protective layer 16 is formed on the dielectric layer 15.
  • the front substrate 11 serves as an image display surface on which an image is displayed.
  • a plurality of data electrodes 22 are formed on the rear substrate 21, a dielectric layer 23 is formed so as to cover the data electrodes 22, and a grid-like partition wall 24 is further formed thereon.
  • the phosphor layer 25R that emits red (R), the phosphor layer 25G that emits green (G), and the phosphor layer that emits blue (B) are formed on the side surfaces of the barrier ribs 24 and the surface of the dielectric layer 23. 25B is provided.
  • the phosphor layer 25R, the phosphor layer 25G, and the phosphor layer 25B are collectively referred to as a phosphor layer 25.
  • the front substrate 11 and the rear substrate 21 are arranged to face each other so that the display electrode pair 14 and the data electrode 22 intersect each other with a minute space therebetween, and a discharge space is provided in the gap between the front substrate 11 and the rear substrate 21.
  • the outer peripheral part is sealed with sealing materials, such as a glass frit, and the mixed gas of neon and xenon is enclosed as discharge gas in the discharge space, for example.
  • the discharge space is partitioned into a plurality of sections by the barrier ribs 24, and discharge cells, which are light-emitting elements constituting the pixels, are formed at the intersections between the display electrode pairs 14 and the data electrodes 22.
  • discharge is generated in these discharge cells, and the phosphor layer 25 emits light (discharge cells are turned on), thereby displaying a color image on the panel 10.
  • one pixel is composed of three consecutive discharge cells arranged in the direction in which the display electrode pair 14 extends.
  • the three discharge cells are a discharge cell having a phosphor layer 25R and emitting red (R) light (hereinafter referred to as “red discharge cell”) and a phosphor layer 25G having a green color (G).
  • red discharge cell a discharge cell having a phosphor layer 25R and emitting red (R) light
  • green discharge cell A discharge cell that emits light
  • B blue discharge cell
  • the structure of the panel 10 is not limited to the above-described structure, and may be, for example, provided with a stripe-shaped partition wall.
  • FIG. 3 is a diagram showing an example of an electrode arrangement of panel 10 used in plasma display device 30 in accordance with the exemplary embodiment of the present invention.
  • the panel 10 includes n scan electrodes SC1 to SCn (scan electrode 12 in FIG. 2) and n sustain electrodes SU1 to SUn (sustain electrode 13 in FIG. 2) extending in the first direction.
  • M data electrodes D1 to Dm (data electrodes 22 in FIG. 2) extending in a second direction intersecting the first direction are arranged.
  • the first direction is referred to as a row direction (or horizontal direction, line direction, or x coordinate direction), and the second direction is referred to as a column direction (or vertical direction or y coordinate direction).
  • m discharge cells are formed on one pair of display electrodes 14 and m / 3 pixels are formed.
  • the discharge cell having the data electrode Dp + 1 is coated with a green phosphor as the phosphor layer 25G, and this discharge cell becomes a green discharge cell.
  • a blue phosphor is applied as a phosphor layer 25B to the discharge cell having the data electrode Dp + 2, and this discharge cell becomes a blue discharge cell.
  • a red discharge cell, a green discharge cell, and a blue discharge cell adjacent to each other constitute a set to constitute one pixel.
  • one field includes a plurality of image display subfields for displaying an image on panel 10, display device identification subfield SFo, y-coordinate detection subfield SFy, and x-coordinate detection subfield SFx.
  • the image display subfield is also simply referred to as a subfield.
  • Each image display subfield has an initialization period, an address period, and a sustain period.
  • the initialization operation in the initialization period includes “forced initialization operation” and “selective initialization operation”.
  • forced initializing operation an initializing discharge is forcibly generated in the discharge cells regardless of the presence or absence of discharge in the immediately preceding subfield.
  • selective initializing operation initializing discharge is selectively generated only in the discharge cells that have generated address discharge in the address period of the immediately preceding subfield.
  • the first subfield (for example, subfield SF1) of one field is set as a subfield (forced initialization subfield) for performing a forced initialization operation
  • other subfields for example, subfield SF2 and subsequent ones
  • a subfield is a subfield (selective initialization subfield) for performing a selective initialization operation.
  • a luminance weight is set for each subfield.
  • one field has eight subfields (subfields SF1 to SF8), and each subfield has a luminance of (1, 34, 21, 13, 8, 5, 3, 2).
  • An example of setting a weight is given.
  • the position of the light pen 50 in the image display area is represented by x and y coordinates.
  • the x coordinate detection subfield SFx and the y coordinate detection subfield SFy are subfields for detecting the x coordinate and the y coordinate of the position (position coordinate) of the light pen 50 in the image display area.
  • the light pen 50 is provided in the multi-screen display system 100 and is used by a user to input characters and drawings on the panel 10 by handwriting. Details of the light pen 50 will be described later.
  • wireless communication is performed between the light pen 50 and the drawing device.
  • the light pen 50 calculates the position coordinates of the light pen 50 inside the light pen 50 and transmits data of the calculated position coordinates from the light pen 50 to the drawing apparatus by wireless communication.
  • the light pen 50 In order to calculate the position coordinates of the light pen 50 inside the light pen 50, the light pen 50 accurately grasps the timing at which the y-coordinate detection subfield SFy and the x-coordinate detection subfield SFx occur in the plasma display device 30. There is a need to.
  • the image display surface of the multi-screen display device 130 is composed of a plurality of panels 10, in order to calculate the position coordinates of the light pen 50 inside the light pen 50, which panel 10 the light pen 50 is currently on It is necessary for the light pen 50 itself to specify whether or not
  • the display device identification subfield SFo of the present embodiment is for allowing the light pen 50 itself to generate a signal (coordinate reference signal) as a reference for detecting the position coordinates with high accuracy. This is to enable the light pen 50 itself to identify which panel 10 is currently receiving light emission.
  • the order of a plurality of image display subfields for example, subfields SF1 to SF8
  • display device identification subfield SFo for example, y coordinate detection subfield SFy
  • x coordinate detection subfield SFx in one field.
  • each subfield is generated will be described, but the generation order of each subfield is not limited to this order.
  • the display device identification subfield SFo, the y coordinate detection subfield SFy, and the x coordinate detection subfield SFx are not necessarily provided in each field.
  • the display device identification subfield SFo, the y-coordinate detection subfield SFy, and the x-coordinate detection subfield SFx may be generated at a rate of once per a plurality of fields according to the video signal, the usage state of the plasma display device, and the like. Good.
  • FIG. 4 is a diagram schematically showing an example of a drive voltage waveform applied to each electrode of panel 10 in subfields SF1 to SF3 of the image display subfield in the embodiment of the present invention.
  • FIG. 4 shows sustain electrodes SU1 to SUn, scan electrode SC1 that performs the address operation first in the address period, scan electrode SCn that performs the address operation last in the address period (for example, scan electrode SC1080), and data electrode D1 to data electrode.
  • the drive voltage waveform applied to each of Dm (for example, data electrode D5760) is shown.
  • Scan electrode SCi, sustain electrode SUi, and data electrode Dk in the following represent electrodes selected based on image data (data indicating light emission / non-light emission for each subfield) from among the electrodes.
  • each subfield after subfield SF3 generates a drive voltage waveform substantially similar to that of subfield SF2, except for the number of sustain pulses.
  • the voltage 0 (V) is applied to the data electrodes D1 to Dm and the sustain electrodes SU1 to SUn.
  • a scan waveform SC1 to SCn is applied with voltage Vi1 after voltage 0 (V) is applied, and a ramp waveform voltage (hereinafter referred to as “upward ramp waveform voltage”) that gradually rises from voltage Vi1 to voltage Vi2. Apply.
  • the voltage Vi1 is set to a voltage lower than the discharge start voltage for the sustain electrodes SU1 to SUn, and the voltage Vi2 is set to a voltage exceeding the discharge start voltage for the sustain electrodes SU1 to SUn.
  • a weak initializing discharge is generated in each discharge cell while this upward ramp waveform voltage rises.
  • the voltage applied to scan electrodes SC1 to SCn reaches voltage Vi2
  • the voltage of scan electrodes SC1 to SCn is once lowered to voltage Vi3 lower than voltage Vi2, and then lowered to voltage 0 (V).
  • the voltage Vi3 is about 200 (V), but the voltage Vi3 may be any voltage that does not cause discharge in the discharge cells. Further, the voltage may be sharply decreased from the voltage Vi2 to the voltage 0 (V).
  • a voltage 0 (V) is applied to the data electrodes D1 to Dm, and a positive voltage Ve is applied to the sustain electrodes SU1 to SUn.
  • the scan electrodes SC1 to SCn have a ramp waveform voltage that gradually falls from a voltage that is less than the discharge start voltage (eg, voltage 0 (V)) to a negative voltage Vi4 (hereinafter also simply referred to as “down ramp waveform voltage”). Is applied. Voltage Vi4 is set to a voltage exceeding the discharge start voltage with respect to sustain electrodes SU1 to SUn.
  • the voltage applied to the scan electrodes SC1 to SCn is set to the voltage Vc.
  • the above-mentioned drive voltage waveform generated in the initialization period Pi1 is a forced initialization waveform.
  • the wall voltage of each discharge cell in which the initializing discharge has occurred can be made substantially uniform.
  • the initialization discharge generated by the ramp waveform voltage is weaker than the address discharge or the sustain discharge, and the light emission due to the initialization discharge is lower in luminance than the light emission due to the address discharge or the sustain discharge. This is to prevent the light emission by the initialization discharge from hindering the display of an image on the panel 10.
  • the forced initializing operation is described as an initializing operation for forcibly generating an initializing discharge in all the discharge cells in the image display area of panel 10, but the present invention is not limited to this. It is not limited to the configuration.
  • the operation for applying the forced initialization waveform only to some discharge cells in the image display area of the panel 10 is also the forced initialization operation, and the subfield for performing the forced initialization operation is forcibly set.
  • This is an initialization subfield.
  • the forced initializing waveform is applied only to the odd-numbered scan electrodes SC (2N-1) (N is an integer of 1 or more), and the other scan electrodes SC (2N) are described later.
  • a selective initialization waveform is applied.
  • a forced initialization waveform is applied only to the even-numbered scan electrode SC (2N), and a selective initialization waveform is applied to the other scan electrode SC (2N-1).
  • the scan electrodes SC1 to SCn to which the forced initialization waveform is applied may be changed for each field. The same applies to all subfields that perform the forced initialization operation in the following description.
  • voltage 0 (V) is applied to data electrodes D1 to Dm
  • voltage Ve is applied to sustain electrodes SU1 to SUn
  • voltage Vc is applied to scan electrodes SC1 to SCn.
  • a negative scan pulse having a negative voltage Va is applied to the scan electrode SC1 in the first row.
  • a positive address pulse of a positive voltage Vd is applied to the data electrode Dk of the discharge cell that should emit light in the first row of the data electrodes D1 to Dm.
  • the voltages of the scan pulse and the address pulse are adjusted so that the address discharge is weaker than the sustain discharge. Therefore, the light emission due to the address discharge has lower luminance than the light emission due to the sustain discharge. This is to prevent light emission due to the address discharge from hindering display of an image on the panel 10.
  • a scan pulse of voltage Va is applied to scan electrode SC2 in the second row, and an address pulse of voltage Vd is applied to data electrode Dk corresponding to the discharge cell to emit light in the second row.
  • address discharge occurs in the discharge cells in the second row to which the scan pulse and address pulse are simultaneously applied. Address discharge does not occur in the discharge cells to which no address pulse is applied. Thus, the address operation in the discharge cells in the second row is performed.
  • the same addressing operation is sequentially performed in the order of scan electrode SC3, scan electrode SC4,..., Scan electrode SCn up to the discharge cell in the n-th row, and the address period Pw1 of subfield SF1 ends.
  • the order in which the scan pulses are applied to the scan electrodes SC1 to SCn is not limited to the order described above.
  • the order in which the scan pulses are applied to the scan electrodes SC1 to SCn may be arbitrarily set according to the specifications of the image display device.
  • voltage 0 (V) is applied to the data electrodes D1 to Dm. Then, a sustain pulse of positive voltage Vs is applied to scan electrodes SC1 to SCn, and voltage 0 (V) is applied to sustain electrodes SU1 to SUn.
  • a sustain discharge occurs in the discharge cell that has generated the address discharge in the immediately preceding address period Pw1.
  • the phosphor layer 25 of the discharge cell emits light due to the ultraviolet rays generated by the sustain discharge.
  • the number of sustain pulses obtained by multiplying the brightness weight by a predetermined brightness multiple is alternately applied to scan electrodes SC1 to SCn and sustain electrodes SU1 to SUn.
  • the discharge cells that have generated the address discharge in the immediately preceding address period Pw1 generate the sustain discharge the number of times corresponding to the luminance weight, and emit light with the luminance corresponding to the luminance weight.
  • the sustain discharge is a strong discharge and has a high luminance as compared with the initialization discharge and the address discharge.
  • voltage 0 (V) is applied to sustain electrodes SU1 to SUn and data electrodes D1 to Dm, and applied to scan electrodes SC1 to SCn.
  • An upward ramp waveform voltage that gradually rises from the voltage 0 (V) to the positive voltage Vr is applied.
  • the voltage Vr is set to a voltage exceeding the discharge start voltage of the discharge cell that has generated the sustain discharge. As a result, a weak discharge (erase discharge) is generated in the discharge cell that has generated the sustain discharge.
  • the selective initialization subfield will be described by taking the subfield SF2 as an example.
  • the same drive voltage waveform as that in the initialization period Pi2 of the subfield SF2 is applied to each electrode to perform the selective initialization operation. .
  • the voltage 0 (V) is applied to the data electrodes D1 to Dm, and the positive voltage Ve is applied to the sustain electrodes SU1 to SUn.
  • a downward ramp waveform voltage that drops from a voltage that is lower than the discharge start voltage (for example, voltage 0 (V)) to a negative voltage Vi4 is applied to scan electrodes SC1 to SCn.
  • the wall voltage on each electrode is adjusted to a wall voltage suitable for the write operation by this initialization discharge.
  • the initializing discharge does not occur in the discharge cells that did not generate the sustain discharge in the sustain period Ps1 of the immediately preceding subfield SF1.
  • the voltage applied to the scan electrodes SC1 to SCn is set to the voltage Vc.
  • the above-mentioned drive voltage waveform generated in the initialization period Pi2 is a selective initialization waveform.
  • the voltage Vi4 and the voltage Ve are set to voltage values that satisfy the above-described operation according to the characteristics of the panel 10, the specifications of the plasma display device 30, and the like.
  • the drive voltage waveforms similar to those in the address period Pw1 and the sustain period Ps1 in the subfield SF1 are applied to the respective electrodes, except for the number of sustain pulses generated, and thus the description thereof is omitted.
  • each subfield after subfield SF3 the drive voltage waveform similar to that in subfield SF2 is applied to each electrode except for the number of sustain pulses, and the description thereof is omitted.
  • the subfield for performing the forced initialization operation is the subfield SF1, but the present invention is not limited to this configuration.
  • the subfield in which the forced initialization operation is performed may be a subfield after subfield SF2.
  • the present invention is not limited to this configuration.
  • the number of times of performing the forced initialization operation may be once in a plurality of fields.
  • the coordinate detection subfield is a generic name for the display device identification subfield SFo, the y coordinate detection subfield SFy, and the x coordinate detection subfield SFx.
  • the display device identification subfield SFo is for allowing the light pen 50 itself to generate the coordinate reference signal with high accuracy, and the light pen 50 currently receives the light emitted from which panel 10. This is to allow the light pen 50 to identify itself.
  • the drive voltage waveform generated in the display device identification subfield SFo has a waveform shape that is different between the plurality of plasma display devices 30 constituting the multi-screen display device 130. Therefore, hereinafter, the display device identification subfield SFo generated in each plasma display device 30a, 30b, 30c, 30d is distinguished from each other as a display device identification subfield SFao, SFbo, SFco, SFdo, respectively.
  • the y-coordinate detection is performed in order to prevent the light pen 50 from erroneously detecting the position coordinates and moving the cursor to the wrong position when moving between the adjacent plasma display devices 30.
  • the drive voltage waveforms generated in the subfield SFy and the x-coordinate detection subfield SFx also have different waveform shapes among the plurality of plasma display devices 30. Therefore, hereinafter, the y-coordinate detection subfield SFy and the x-coordinate detection subfield SFx generated in each of the plasma display devices 30a, 30b, 30c, and 30d are respectively expressed as the y-coordinate detection subfield SFay, SFby, SFfy, SFdy, and the x-coordinate.
  • the detection subfields are distinguished from each other as SFax, SFbx, SFcx, and SFdx.
  • FIG. 5 shows driving voltage waveforms generated in the plasma display device 30a shown in FIG. 1
  • FIG. 6 shows driving voltage waveforms generated in the plasma display device 30b shown in FIG. Shows a driving voltage waveform generated in the plasma display device 30c shown in FIG. 1
  • FIG. 8 shows a driving voltage waveform generated in the plasma display device 30d shown in FIG.
  • each drawing also shows a part of the sustain period Ps8 of the subfield SF8 immediately before the display device identification subfield SFo and a part of the subfield SF1.
  • the display device identification subfield SFao generated in the plasma display device 30a has an initialization period Pio, an address period Pwo, and a display device identification period Pao.
  • the same driving voltage waveform as that in the initialization period Pi1 of the subfield SF1 of the image display subfield is applied to each electrode to perform the same forced initialization operation, and thus the description thereof is omitted.
  • the voltage 0 (V) is applied to the data electrodes D1 to Dm
  • the voltage Ve is applied to the sustain electrodes SU1 to SUn
  • the voltage Vc is applied to the scan electrodes SC1 to SCn.
  • an address pulse of the voltage Vd is applied to the data electrodes D1 to Dm and a scan pulse of the voltage Va is applied to the scan electrodes SC1 to SCn to generate an address discharge in each discharge cell.
  • the scan pulse is sequentially applied to each electrode from the scan electrode SC1 to the scan electrode SCn while the address pulse is applied to all the data electrodes D1 to Dm. It is also possible to apply a scan pulse to all the scan electrodes SC1 to SCn at a time to generate an address discharge in all the discharge cells in the image display area of the panel 10a of the plasma display device 30a.
  • the voltage 0 (V) is applied to the data electrodes D1 to Dm. Further, voltage Vc is applied to scan electrodes SC1 to SCn, and then voltage 0 (V) is applied. Further, the voltage applied to sustain electrodes SU1 to SUn is changed from voltage Ve to voltage 0 (V). In the present embodiment, this state is maintained from time to0 to time To0. Therefore, during this period, after the last address discharge occurs in the discharge cells, a state in which no discharge occurs is maintained. Time to0 is the time when the scan pulse for generating the last address discharge is applied to scan electrode SCn.
  • the time To0 is set to a time longer than any of the time TA1, time TA2, and time TA3 described later.
  • the time To0 is about 60 ⁇ sec, for example.
  • the panel 10a is caused to emit a plurality of times of light emission (light emission for display device identification) as a reference when calculating the position coordinates in the light pen 50. That is, light emission for display device identification is emitted to all the discharge cells in the image display area of the panel 10a at predetermined time intervals (in this embodiment, for example, time TA1, time TA2, and time TA3 in this embodiment). Is generated a plurality of times (in this embodiment, for example, four times).
  • this display device identification discharge is a strong discharge as compared with the address discharge, and the light emission luminance is also high, like the sustain discharge.
  • a plurality of times at predetermined time intervals for specifying the plasma display device 30a.
  • time TA1, time TA2, and time TA3 in this embodiment for specifying the plasma display device 30a.
  • four times of display device identification discharges are generated, and the entire surface of the image display surface of the panel 10a is applied a plurality of times (for example, time TA1, time TA2, time TA3).
  • time TA1, time TA2, time TA3 For example, light is emitted four times.
  • the light pen 50 receives this light emission, recognizes that the light pen 50 is on the panel 10a, and calculates a coordinate reference signal (position coordinate (x coordinate, y coordinate) of the light pen 50). To create a reference signal).
  • the light pen 50 is used regardless of where the tip of the light pen 50 is in the image display area of the panel 10a. This light emission can be received at the same timing.
  • the time TA1 is about 50 ⁇ sec
  • the time TA2 is about 20 ⁇ sec
  • the time TA3 is about 30 ⁇ sec.
  • the same erase operation as that performed at the end of the sustain period Ps1 of the subfield SF1 is performed. Perform an erase operation. Thereby, a weak erasing discharge is generated in all the discharge cells in the image display area of the panel 10a.
  • a y coordinate detection subfield SFay and an x coordinate detection subfield SFax are generated.
  • the y coordinate detection subfield SFay has an initialization period Piy and a y coordinate detection period Pay.
  • a drive voltage waveform similar to that in the initialization period Pi2 of the subfield SF2 of the image display subfield is applied to each electrode to perform the same selective initialization operation, and thus description thereof is omitted.
  • the display device identification discharge is generated in all the discharge cells in the image display area of the panel 10a.
  • a weak initializing discharge is generated in all the discharge cells.
  • the wall voltage of all the discharge cells in the image display area of panel 10a is adjusted to the wall voltage suitable for the y coordinate detection pattern display operation in the subsequent y coordinate detection period Pay.
  • priming particles that assist the generation of discharge in the y coordinate detection period Pay are generated in the discharge cell.
  • the voltage Ve is applied to the sustain electrodes SU1 to SUn
  • the voltage 0 (V) is applied to the data electrodes D1 to Dm
  • the voltage is applied to the scan electrodes SC1 to SCn.
  • Vc is applied.
  • y coordinate detection voltage Vdy is a voltage higher than the voltage 0 (V)
  • the voltage Vay of the y coordinate detection pulse is a negative voltage lower than the voltage Vc.
  • the pulse width of the y-coordinate detection pulse is shown as Ty1.
  • Discharge occurs in the discharge cells in the first row at the intersections between the data electrodes D1 to Dm to which the y coordinate detection voltage Vdy is applied and the scan electrode SC1 to which the y coordinate detection pulse of the voltage Vay is applied.
  • This discharge like the address discharge, is weaker than the sustain discharge and has a low emission luminance.
  • discharge occurs in all the discharge cells constituting the first row, and these discharge cells emit light all at once.
  • the 5760 discharge cells (1920 pixels) constituting the first row emit light all at once. And this light emission becomes light emission for y coordinate detection.
  • discharge cell row an aggregate of discharge cells constituting one row
  • pixel row an aggregate of pixels constituting one row
  • the discharge cell row and the pixel row are substantially the same, and in the above operation, the first pixel row (first discharge cell row) emits light all at once.
  • a y coordinate detection pulse of the voltage Vay is applied to the scan electrode SC2 in the second row.
  • light emission for y coordinate detection occurs in the second pixel row (second discharge cell row).
  • one horizontal line that emits light corresponds to the upper end portion (pixels in the first row) of the image display area of the panel 10a.
  • a pattern (y coordinate detection pattern a) that sequentially moves one line at a time from the bottom line to the lower end (nth pixel line) is displayed. That is, the y-coordinate detection pattern a is a pattern in which each pixel row from the first row to the n-th row of the image display area sequentially emits light for each row.
  • the y coordinate detection pattern is a pattern in which the first light emission line extended in the x coordinate direction moves in the y coordinate direction.
  • each pixel row from the first row to the n-th row in the image display area sequentially emits light every row, so that the tip of the light pen 50 is the image of the panel 10a.
  • the timing at which the light pen 50 receives this light emission varies depending on where the display area is located.
  • the time for applying the y-coordinate detection pulse to each of the scan electrodes SC1 to SCn is Ty1.
  • This Ty1 is, for example, about 1 ⁇ sec.
  • the subsequent x-coordinate detection subfield SFax has an initialization period Pix and an x-coordinate detection period Pax.
  • a driving voltage waveform similar to that in the initialization period Pi1 of the subfield SF1 of the image display subfield is applied to each electrode to perform the same forced initialization operation, and thus description thereof is omitted.
  • initialization discharge occurs in all the discharge cells in the image display area of the panel 10a.
  • the wall voltage of all the discharge cells in the image display area of the panel 10a is adjusted to the wall voltage suitable for the x coordinate detection pattern display operation in the subsequent x coordinate detection period Pax.
  • priming particles that assist the generation of discharge in the x-coordinate detection period Pax are generated in the discharge cell.
  • the voltage 0 (V) is applied to the data electrodes D1 to Dm
  • the voltage Ve is applied to the sustain electrodes SU1 to SUn
  • the voltage is applied to the scan electrodes SC1 to SCn.
  • Vc is applied.
  • the negative x coordinate detection voltage Vax is applied to the scan electrodes SC1 to SCn, and the positive x coordinate of the voltage Vdx is applied to the data electrodes D1 to D3 in the first to third columns.
  • Apply detection pulse The voltage Vdx of the x coordinate detection pulse is higher than the voltage 0 (V), and the x coordinate detection voltage Vax is a negative voltage lower than the voltage Vc.
  • the pulse width of the x-coordinate detection pulse is shown as Tx1.
  • the data electrodes D1 to D3 correspond to a red discharge cell, a green discharge cell, and a blue discharge cell constituting one pixel, and the pixel is a pixel arranged at the left end of the image display area, for example. It is.
  • Discharge occurs in the discharge cells at the intersections between the data electrodes D1 to D3 to which the x coordinate detection pulse of the voltage Vdx is applied and the scan electrodes SC1 to SCn to which the x coordinate detection voltage Vax is applied.
  • This discharge like the address discharge, is weaker than the sustain discharge and has a low emission luminance.
  • discharge occurs in all the pixels constituting the first column, and these pixels emit light all at once.
  • the 1080 pixels (3 columns ⁇ 1080 discharge cells) constituting the first column emit light all at once. And this light emission becomes light emission for x coordinate detection.
  • discharge cell column an assembly of discharge cells constituting one column
  • pixel column an assembly of discharge cells (pixel column) composed of three adjacent discharge cell columns
  • the first pixel column that is, the first, second, and third discharge cell columns
  • the x coordinate detection pulse of the voltage Vdx is applied to the data electrodes D4 to D6 in the fourth column to the sixth column.
  • light emission for x coordinate detection occurs in the second pixel column (fourth, fifth, and sixth discharge cell columns).
  • Similar operations are performed adjacent to each other in the order of data electrodes D7 to D9, data electrodes D10 to D12,..., Data electrodes Dm-2 to Dm, with the x coordinate detection voltage Vax being applied to scan electrodes SC1 to SCn.
  • Each of the three data electrodes 22 is sequentially performed until reaching the m-th discharge cell, and light emission for x coordinate detection is performed on each pixel column from the third column to the last column (for example, 1920 column). Generate sequentially.
  • one vertical line that emits light (that is, one pixel column that emits light) is displayed at the left end (first column) of the image display area of the panel 10a.
  • the x-coordinate detection pattern a is a pattern in which three discharge cell columns adjacent to each other sequentially emit light by three columns from the left end (first column) to the right end (m-th column) of the image display area. It is.
  • one vertical line that emits light extending in the y-coordinate direction is also referred to as a “second light emission line”. That is, the x-coordinate detection pattern is a pattern in which the second light emission line extended in the y-coordinate direction moves in the x-coordinate direction.
  • each pixel column from the first column to the last column in the image display area sequentially emits light for each column, so that the tip of the light pen 50 is the image of the panel 10a.
  • the timing at which the light pen 50 receives this light emission varies depending on where the display area is located.
  • the time for applying the x-coordinate detection pulse to each of the data electrodes D1 to Dm is Tx1.
  • This Tx1 is about 1 ⁇ sec, for example.
  • the display device identification subfield SFbo generated in the plasma display device 30b has an initialization period Pio, an address period Pwo, and a display device identification period Pbo.
  • a predetermined time interval different from the display device identification period Pao in this embodiment, for example, time TB1, time TB2, time In TB3
  • a plurality of display device identification discharges are generated, and the entire image display surface of the panel 10b is caused to emit light a plurality of times (for example, four times).
  • the light pen 50 receives this light emission, recognizes that the light pen 50 is on the panel 10b, and calculates a coordinate reference signal (position coordinates (x coordinate, y coordinate) of the light pen 50). To create a reference signal).
  • the time TB1 is about 40 ⁇ sec
  • the time TB2 is about 30 ⁇ sec
  • the time TB3 is about 30 ⁇ sec.
  • the time To0 is, for example, about 60 ⁇ sec, and is set to a time longer than any of the time TB1, the time TB2, and the time TB3.
  • a y-coordinate detection subfield SFby and an x-coordinate detection subfield SFbx are generated.
  • the y coordinate detection subfield SFby has an initialization period Piy and a y coordinate detection period Pby.
  • a drive voltage waveform similar to that in the initialization period Piy of the y-coordinate detection subfield SFay is applied to each electrode to perform the same selective initialization operation, and thus description thereof is omitted.
  • the y coordinate detection period Pby a drive voltage waveform similar to that in the y coordinate detection period Pay of the y coordinate detection subfield SFay is applied to each electrode. Therefore, in the y-coordinate detection period Pby, as in the y-coordinate detection period Pay, the first light emission line is changed from the upper end portion (first pixel row) to the lower end portion (pixels in the nth row) of the image display area of the panel 10b.
  • the y-coordinate detection pattern a that sequentially moves line by line up to line) is displayed on the panel 10b.
  • the x-coordinate detection subfield SFbx has an initialization period Pix and an x-coordinate detection period Pbx.
  • a driving voltage waveform similar to that in the initialization period Pix of the x-coordinate detection subfield SFax is applied to each electrode to perform the same forced initialization operation, and thus description thereof is omitted.
  • the same drive voltage waveform as that in the x coordinate detection period Pax of the x coordinate detection subfield SFax is applied to each electrode.
  • the order in which the x-coordinate detection pulses are applied to the data electrodes D1 to Dm is different from the x-coordinate detection period Pax.
  • an x-coordinate detection pulse is applied to the data electrodes Dm-2 to Dm, and the last pixel columns (that is, the m-2th, m ⁇ 1th, and mth columns). Discharge the cell array) simultaneously.
  • an x coordinate detection pulse is applied to the data electrodes Dm-5 to Dm-3, and the pixel columns adjacent to the last column (that is, the m-5th column, the m-4th column, and the m-3th column). Discharge the cell array) simultaneously.
  • the same operation is performed for each of the three data electrodes 22 adjacent to each other in the order of the data electrodes Dm-8 to Dm-6,..., The data electrodes D7 to D9, the data electrodes D4 to D6, and the data electrodes D1 to D3. Then, the process is sequentially performed until the discharge cell in the first column, and light emission for x coordinate detection is sequentially generated in each pixel column from the last column (for example, 1920 column) to the first column.
  • the second light-emitting line extends from the right end (m / 3-th pixel column) to the left end (one column) of the image display area of the panel 10b.
  • a pattern (x coordinate detection pattern b) that sequentially moves one column at a time (up to the pixel column of the eye) is displayed on the panel 10b.
  • the x-coordinate detection pattern b is a pattern in which three discharge cell columns adjacent to each other sequentially emit light by three columns from the right end (m-th column) to the left end (first column) of the image display area. It is.
  • the display device identification subfield SFco generated in the plasma display device 30c has an initialization period Pio, an address period Pwo, and a display device identification period Pco.
  • a predetermined time interval in this embodiment, for example, time TC1, time, which is different from both of the display device identification periods Pao and Pbo.
  • time TC2 time TC3
  • a plurality of display device identification discharges are generated, and the entire image display surface of the panel 10c is caused to emit light a plurality of times (for example, four times).
  • the light pen 50 receives this light emission, recognizes that the light pen 50 is on the panel 10c, and calculates a coordinate reference signal (position coordinate (x coordinate, y coordinate) of the light pen 50). To create a reference signal).
  • the time TC1 is about 30 ⁇ sec
  • the time TC2 is about 40 ⁇ sec
  • the time TC3 is about 30 ⁇ sec.
  • the time To0 is, for example, about 60 ⁇ sec, and is set to a time longer than any of the time TC1, the time TC2, and the time TC3.
  • a y-coordinate detection subfield SFcy and an x-coordinate detection subfield SFfx are generated.
  • the y coordinate detection subfield SFcy has an initialization period Piy and a y coordinate detection period Pcy.
  • a drive voltage waveform similar to that in the initialization period Piy of the y-coordinate detection subfield SFay is applied to each electrode to perform the same selective initialization operation, and thus description thereof is omitted.
  • y coordinate detection period Pcy a drive voltage waveform similar to that in the y coordinate detection period Pay of the y coordinate detection subfield SFay is applied to each electrode.
  • the order in which the y coordinate detection pulse is applied to the scan electrodes SC1 to SCn is different from the y coordinate detection period Pay.
  • a y-coordinate detection pulse is applied to the scan electrode SCn, and the nth pixel row is caused to emit light all at once.
  • a y-coordinate detection pulse is applied to scan electrode SCn-1, and the n-1th pixel row is caused to emit light all at once.
  • the first light emitting line is reversed from the lower end (nth pixel row) to the upper end (1) of the image display area of the panel 10c, contrary to the y-coordinate detection periods Pay and Pby.
  • a pattern (y-coordinate detection pattern b) that sequentially moves one line at a time until the first pixel line) is displayed on the panel 10c.
  • the x coordinate detection subfield SFcx has an initialization period Pix and an x coordinate detection period Pcx.
  • a driving voltage waveform similar to that in the initialization period Pix of the x-coordinate detection subfield SFax is applied to each electrode to perform the same forced initialization operation, and thus description thereof is omitted.
  • a drive voltage waveform similar to that in the x coordinate detection period Pax of the x coordinate detection subfield SFax is applied to each electrode. Accordingly, in the x-coordinate detection period Pcx, as in the x-coordinate detection period Pax, the second light emission line is shifted from the left end (first pixel column) to the right end (m / 3 column) of the image display area of the panel 10c.
  • the x-coordinate detection pattern a that sequentially moves one column at a time is displayed on the panel 10c.
  • the display device identification subfield SFdo generated in the plasma display device 30d has an initialization period Pio, an address period Pwo, and a display device identification period Pdo.
  • a predetermined time interval different from any of the display device identification periods Pao, Pbo, and Pco in this embodiment, for example, time TD1.
  • Time TD2, time TD3 a plurality of display device identification discharges are generated, and the entire image display surface of the panel 10d is caused to emit light a plurality of times (for example, four times).
  • the light pen 50 receives this light emission, recognizes that the light pen 50 is on the panel 10d, and calculates a coordinate reference signal (position coordinate (x coordinate, y coordinate) of the light pen 50). To create a reference signal).
  • time TD1 is about 20 ⁇ sec
  • time TD2 is about 50 ⁇ sec
  • time TD3 is about 30 ⁇ sec.
  • the time To0 is about 60 ⁇ sec, for example, and is set to a time longer than any of the time TD1, the time TD2, and the time TD3.
  • a y coordinate detection subfield SFdy and an x coordinate detection subfield SFdx are generated.
  • the y coordinate detection subfield SFdy has an initialization period Piy and a y coordinate detection period Pdy.
  • a drive voltage waveform similar to that in the initialization period Piy of the y-coordinate detection subfield SFay is applied to each electrode to perform the same selective initialization operation, and thus description thereof is omitted.
  • the y coordinate detection period Pdy In the y coordinate detection period Pdy, a drive voltage waveform similar to that in the y coordinate detection period Pcy of the y coordinate detection subfield SFcy is applied to each electrode. Therefore, in the y-coordinate detection period Pdy, as in the y-coordinate detection period Pcy, the first light emission line is changed from the lower end portion (nth pixel row) to the upper end portion (pixels in the first row) of the image display area of the panel 10d.
  • the y-coordinate detection pattern b that sequentially moves line by line until the line) is displayed on the panel 10d.
  • the x-coordinate detection subfield SFdx has an initialization period Pix and an x-coordinate detection period Pdx.
  • a driving voltage waveform similar to that in the initialization period Pix of the x-coordinate detection subfield SFax is applied to each electrode to perform the same forced initialization operation, and thus description thereof is omitted.
  • the second light emitting line is shifted from the right end (m / 3th pixel column) to the left end (first column) of the image display area of the panel 10d.
  • the x-coordinate detection pattern b that sequentially moves one column at a time until the pixel column is displayed on the panel 10c.
  • the above is the outline of the drive voltage waveforms of the display device identification subfield SFo, the y coordinate detection subfield SFy, and the x coordinate detection subfield SFx.
  • each subfield is generated at substantially the same timing.
  • the times To0, TA1 to TA3, TB1 to TB3, TC1 to TC3, and TD1 to TD3 are not limited to the numerical values described above. Each time may be set appropriately according to the specifications of the multi-screen display system 100.
  • the display device identification subfield SFo is a general term for the display device identification subfields SFao, SFbo, SFco, SFdo
  • the display device identification period Po is the display device identification period Pao, Pbo, Pco, A general term for Pdo.
  • the y coordinate detection subfield SFy is a generic name of the y coordinate detection subfields SFay, SFby, SFfy, and SFdy
  • the y coordinate detection period Py is a generic name of the y coordinate detection periods Pay, Pby, Pcy, and Pdy.
  • the x-coordinate detection subfield SFx is a generic name for the x-coordinate detection subfields SFax, SFbx, SFcx, and SFdx
  • the x-coordinate detection period Px is a generic name for the x-coordinate detection periods Pax, Pbx, Pcx, and Pdx.
  • the display device identification pulse V1 is a generic name for the display device identification pulses Va1, Vb1, Vc1, and Vd1
  • the display device identification pulse V2 is a generic name for the display device identification pulses Va2, Vb2, Vc2, and Vd2, and is a display device identification pulse.
  • V3 is a generic name for display device identification pulses Va3, Vb3, Vc3, and Vd3
  • a display device identification pulse V4 is a generic name for display device identification pulses Va4, Vb4, Vc4, and Vd4.
  • voltage Vc ⁇ 50 (V)
  • voltage Vr 205 (V)
  • voltage Ve 155 (V )
  • the voltage Va, the voltage Vay, and the voltage Vax are set to be equal to each other, and the voltage Vd, the voltage Vdy, and the voltage Vdx are set to be equal to each other. Different voltages may be used.
  • the voltage Vso is set to a voltage equal to the voltage Vs, but the voltage Vso may be a voltage different from the voltage Vs.
  • the voltage Vso may be a voltage that causes display device identification discharge.
  • a voltage Vi2 of the rising ramp waveform voltage generated in the initialization period Pi1 of the subfield SF1 and a voltage Vi2 of the rising ramp waveform voltage generated in the initialization period Pio of the display device identification subfield SFo
  • the voltage Vi2 of the rising ramp waveform voltage generated in the initialization period Pix of the x-coordinate detection subfield SFx is the same voltage, but these voltages Vi2 may be set to different voltages.
  • the gradient of the rising ramp waveform voltage generated in the initialization period Pi1 of the subfield SF1, the initialization period Pio of the display device identification subfield SFo, and the initialization period Pix of the x coordinate detection subfield SFx is about 1.5 ( V / ⁇ sec).
  • the gradient of the downward ramp waveform voltage generated in the initialization period Pix of the subfield SFx is about ⁇ 2.5 (V / ⁇ sec).
  • the gradient of the rising ramp waveform voltage generated at the end of each sustain period Ps1 to Ps8 of the image display subfield (subfield SF1 to SF8) and at the end of the display apparatus identification period Po of the display apparatus identification subfield SFo is about 10 ( V / ⁇ sec).
  • the specific numerical values such as the voltage value and the gradient described above are merely examples, and the present invention is not limited to the numerical values described above for each voltage value and the gradient.
  • Each voltage value, gradient, and the like are preferably set optimally based on the discharge characteristics of the panel and the specifications of the plasma display device.
  • a display device identification subfield SFo is provided in one field, and each drive voltage waveform of the display device identification subfield SFo is generated in the waveform shape shown in FIGS. 5, 6, 7, and 8. The reason for doing this is as follows.
  • wireless communication is performed between the drawing apparatus and the light pen 50.
  • the light pen 50 itself can generate a coordinate reference signal (a signal indicating the generation timing of the y-coordinate detection period Py and the x-coordinate detection period Px).
  • a subfield SFo is provided.
  • the light pen 50 detects light emission generated at a specific time interval on the panel 10 due to the display device identification discharge, and generates a coordinate reference signal. Based on this coordinate reference signal, the light pen 50 calculates the position coordinates of the light pen 50 itself.
  • each drive voltage of the display device identification subfield SFo with the waveform shape shown in FIG. 5, FIG. 6, FIG. 7, and FIG. A waveform is generated, and the time To0 is set to a time longer than any of the times TA1, TA2, TA3, TB1, TB2, TB3, TC1, TC2, TC3, TD1, TD2, and TD3. This is due to the following reasons.
  • the light receiving element of the light pen 50 also detects light emission generated by address discharge. Therefore, depending on the set value of time To0, the light pen 50 may erroneously recognize the light emission generated by the address discharge in the address period Pwo of the display device identification subfield SFo as the light emission by the display device identification discharge.
  • the time To0 is set to be longer than the other times, the time from the time when the light pen 50 detects the light emission due to the write discharge, regardless of the position in the image display area.
  • the interval to to1 is longer than other times.
  • the multi-screen display device 130 is configured by arranging a plurality of plasma display devices 30 in a matrix. Therefore, it is necessary for the light pen 50 itself to specify which panel 10 the light pen 50 is currently on.
  • times TA1, TA2, and TA3 set for the plasma display device 30a, times TB1, TB2, and TB3 set for the plasma display device 30b, times TC1, TC2, and TC3 set for the plasma display device 30c, and the plasma display device If the time TD1, TD2, and TD3 set to 30c are set to a combination of different times, the light pen 50 measures the light emission interval due to the display device identification discharge, so that the light pen 50 itself is on which panel 10 Can be identified.
  • the intervals of light emission by the display device identification discharge are set to different times depending on the plasma display devices 30. ing.
  • the position (position coordinates) of the light pen 50 in the image display area while displaying an image corresponding to the image signal on the panel 10 by the above-described operation can be generated stably, the light pen 50 itself can identify the panel 10 on which the light pen 50 is currently located, and the position coordinates of the light pen 50 can be calculated with high accuracy.
  • the configuration of the multi-screen display system 100 in the present embodiment will be described.
  • the multi-screen display device 130 is configured using a plurality of plasma display devices 30
  • the image display device that constitutes the multi-screen display device 130 is not limited to the plasma display device 30 at all. It is not something.
  • FIG. 9 is a diagram schematically showing a configuration example of the multi-screen display system 100 in the embodiment of the present invention.
  • the multi-screen display system 100 shown in the present embodiment includes a multi-screen display device 130, a drawing device 40, and a plurality of light pens 50a, 50b, 50c, and 50d as constituent elements.
  • the number of light pens 50 included in the multi-screen display system 100 is not limited to four, and may be five or more, three or less, or one.
  • the light pen 50 is used when the user inputs characters, drawings and the like in the image display area of the panel 10 by handwriting.
  • the light pen 50 is formed in a rod shape and includes a light receiving element 52, a contact switch 53, a timing detection unit 54, a coordinate calculation unit 56, and a transmission unit 59.
  • the contact switch 53 is provided at the tip of the light pen 50 and detects whether or not the tip of the light pen 50 has contacted the front substrate 11 of the panel 10 (the image display surface of the panel 10).
  • the light pen 50 is not limited to the configuration having the contact switch 53 at all.
  • the light pen may be a non-contact type provided with a manual switch instead of the contact switch 53.
  • the user turns on the manual switch to turn the image display surface using the light pen located at a position away from the image display surface. Characters and drawings can be input by handwriting.
  • the light pen may have both the contact switch 53 and the manual switch so that one light pen can be used in two types, a contact type and a non-contact type.
  • it may be configured such that the user can arbitrarily switch the drawing mode S0 (for example, line color, line thickness, line type, etc. used for drawing) by operating a manual switch. .
  • the light receiving element 52 receives light emitted from the image display surface of the panel 10 and converts it into an electric signal (light receiving signal). This light reception signal changes according to the amount of light received, and the light reception signal increases as the light amount increases. Then, the light reception signal is output to the timing detection unit 54 and the coordinate calculation unit 56.
  • the position coordinates (x, y) of the light pen 50 are positions where the light receiving element 52 receives light emitted from the image display surface of the panel 10.
  • the timing detection unit 54, the coordinate calculation unit 56, and the transmission unit 59 perform the following operation regardless of whether or not the contact switch 53 detects contact.
  • the timing detection unit 54 detects light emission for display device identification (light emission generated by display device identification discharge) generated in the display device identification period Po of the display device identification subfield SFo based on the light reception signal. Specifically, the timing detection unit 54 measures the occurrence intervals of a plurality of (for example, five times) emission using a timer (not shown in FIG. 9) of the timing detection unit 54.
  • a predetermined time interval for example, a set of times To0, TA1, TA2, TA3, a set of times To0, TB1, TB2, TB3, or a set of times To0, TC1, TC2, Whether a set of TC3 or a set of times To0, TD1, TD2, and TD3 is met is determined by a plurality of threshold values (for example, times To0, TA1, TA2, TA3, The determination is made by comparing the measured time intervals with the threshold values corresponding to TB1, TB2, TB3, TC1, TC2, TC3, TD1, TD2, and TD3.
  • a predetermined time interval for example, a set of times To0, TA1, TA2, TA3, a set of times To0, TB1, TB2, TB3, or a set of times To0, TC1, TC2, Whether a set of TC3 or a set of times To0, TD1, TD2, and TD3 is met is determined
  • the timing detection unit 54 determines which panel 10 the light pen 50 is currently on based on the determination result, and outputs a panel identification signal indicating the result to the coordinate calculation unit 56.
  • the timing detection unit 54 creates a coordinate reference signal based on one of a plurality of continuous (for example, five) light emission. For example, in the examples shown in FIGS. 5, 6, 7, and 8, the coordinate reference signal is generated based on the light emission generated at the time to1 of the display device identification period Po of the display device identification subfield SFo.
  • the time to1 is the time when the first display device identification pulse V1 is applied to the scan electrodes SC1 to SCn in the display device identification period Po of the display device identification subfield SFo.
  • the coordinate reference signal is a signal having a rising edge at each of time ty0 and time tx0, which is not shown in FIGS. 5, 6, 7, and 8, for example.
  • the time ty0 is a time at which the y coordinate detection pulse is applied to the scan electrode SC1 in the first row in the y coordinate detection period Py of the y coordinate detection subfield SFy for displaying the y coordinate detection pattern a.
  • the y coordinate detection pattern In the y-coordinate detection period Py of the y-coordinate detection subfield SFy displaying b, it is time to apply the y-coordinate detection pulse to the scan electrode SCn in the last row.
  • the x coordinate detection pulse is applied to the data electrodes D1 to D3 corresponding to the first pixel column in the x coordinate detection period Px of the x coordinate detection subfield SFx displaying the x coordinate detection pattern a.
  • X coordinate detection pulse is applied to the data electrodes Dm-2 to Dm corresponding to the last pixel column in the x coordinate detection period Px of the x coordinate detection subfield SFx displaying the x coordinate detection pattern b. It's time.
  • the timing detection unit 54 outputs the coordinate reference signal to the coordinate calculation unit 56.
  • the coordinate reference signal is not limited to a signal having rising edges at time ty0 and time tx0.
  • the coordinate reference signal may be any signal that can be used as a reference for specifying the time when the light receiving element 52 receives light emission by the y coordinate detection pattern and light emission by the x coordinate detection pattern.
  • the coordinate calculation unit 56 includes a counter that measures the length of time and an arithmetic circuit that performs an operation on the output of the counter (not shown in FIG. 9).
  • the coordinate calculation unit 56 generates a signal indicating the light emission of the y coordinate detection pattern and the x coordinate detection pattern based on the panel identification signal indicating which panel 10 the light pen 50 is currently on, the coordinate reference signal, and the light reception signal.
  • a signal indicating light emission is selectively extracted from the light reception signal, and the position (x coordinate, y coordinate) of the light pen 50 in the image display area is calculated.
  • the coordinate calculation unit 56 counts the time (time Tyy) from the time ty0 to the time (time tyy) at which light reception is first received by the light receiving element 52 after the time ty0 based on the coordinate reference signal. Measure with Then, the time Tyy is divided by the time Ty1 (pulse width of the y coordinate detection pulse) in the arithmetic circuit. In this way, the y coordinate of the position of the light pen 50 in the image display area is calculated.
  • the coordinate calculation unit 56 measures, based on the coordinate reference signal, a time (time Txx) from time tx0 to time (time txx) when light is received by the light receiving element 52 for the first time after time tx0. To do. Then, the time Txx is divided by the time Tx1 (pulse width of the x coordinate detection pulse) in the arithmetic circuit. In this way, the x coordinate of the position of the light pen 50 in the image display area is calculated.
  • the time tyy is the time when the light receiving element 52 of the light pen 50 receives light emitted from the panel 10 by the y coordinate detection pattern
  • the time txx is the time when the light receiving element 52 of the light pen 50 receives the panel 10 by the x coordinate detection pattern. It is the time when the light emission generated in
  • the coordinate calculation unit 56 calculates the x coordinate and the y coordinate in consideration of which panel 10 the light pen 50 is currently on.
  • the coordinate calculation unit 56 displays the y coordinate detection pattern a and the x coordinate detection pattern a on the panel 10a. Assuming that the upper left corner of the region is the coordinate (0, 0), the x coordinate and the y coordinate are calculated.
  • the coordinate calculation unit 56 displays the y coordinate detection pattern a and the x coordinate detection pattern b on the panel 10b. Assuming that the upper right end of the region is the coordinate (0, 0), the x coordinate and the y coordinate are calculated.
  • the coordinate calculation unit 56 displays the y coordinate detection pattern b and the x coordinate detection pattern a on the panel 10c. Assuming that the lower left corner of the area is the coordinate (0, 0), the x coordinate and the y coordinate are calculated.
  • the coordinate calculation unit 56 displays the y coordinate detection pattern b and the x coordinate detection pattern b on the panel 10d. Assuming that the lower right corner of the region is the coordinate (0, 0), the x coordinate and the y coordinate are calculated.
  • the coordinate calculation unit 56 uses the coordinates (0, 0) for the x and y coordinates calculated in the panels 10b, 10c, and 10d, in order to facilitate later calculations. ) And x coordinate and y coordinate.
  • the coordinate calculation unit 56 outputs the position coordinates (x, y) of the light pen 50 thus calculated to the transmission unit 59.
  • the transmission unit 59 has a transmission circuit that encodes an electrical signal and converts the encoded signal into a radio signal such as infrared rays and transmits the signal (not shown in FIG. 9). Then, an identification number (ID) assigned to each light pen 50 independently, a drawing mode S0 of the light pen 50 (for example, line color, line thickness, line type, etc. used for drawing), contact switch A signal representing the position coordinate (x, y) of the light pen 50 calculated by the state S1 of 53 and the position calculation unit 56 is encoded, converted into a wireless signal, and wirelessly transmitted to the receiving unit 42 of the drawing apparatus 40.
  • ID identification number assigned to each light pen 50 independently, a drawing mode S0 of the light pen 50 (for example, line color, line thickness, line type, etc. used for drawing), contact switch A signal representing the position coordinate (x, y) of the light pen 50 calculated by the state S1 of 53 and the position calculation unit 56 is encoded, converted into a wireless signal, and wirelessly transmitted to the receiving unit 42 of the
  • the drawing apparatus 40 includes a receiving unit 42, a drawing unit 44, and an image signal distribution unit 46.
  • the drawing device 40 creates a drawing signal based on the position coordinates (x, y) calculated by the coordinate calculation unit 56 of the light pen 50 and the drawing mode S0, and outputs the drawing signal to an appropriate plasma display device 30 through the image signal distribution unit 46.
  • This drawing signal is a signal for displaying on the panel 10 an image handwritten by the user or a cursor used as a pointer, and is substantially the same as the image signal.
  • the receiving unit 42 includes a conversion circuit that receives a radio signal wirelessly transmitted from the transmitting unit 59 of the light pen 50, decodes the received signal, and converts it into an electric signal (not shown in FIG. 9). Then, the wireless signal wirelessly transmitted from the transmission unit 59 is converted into a signal representing the identification number (ID) of the light pen 50, the drawing mode S0, the state S1, and the position coordinates (x, y) and output to the drawing unit 44. To do. When there are a plurality of light pens 50, each signal transmitted from each light pen 50 is received and decoded.
  • each signal output from the receiving unit 42 is referred to as the drawing mode S0. (T), state S1 (t), position coordinates (x (t), y (t)).
  • the drawing unit 44 includes an image memory 47.
  • the drawing unit 44 draws a color and size corresponding to the drawing mode S0 (t) with the pixel corresponding to the position coordinates (x (t), y (t)) calculated by the coordinate calculation unit 56 as the center.
  • a drawing signal of a pattern (for example, a pattern such as a white circle) is created and written into the image memory 47.
  • the drawing unit 44 uses the position coordinates (x (t), y (t) so that the trajectories of the light pens 50 are not confused with each other. ) Are distinguished from each other, and the above-described operation is performed on each light pen 50.
  • the drawing unit 44 outputs the drawing signal stored in the image memory 47 to the image signal distribution unit 46.
  • the image signal distribution unit 46 combines the drawing signal output from the drawing unit 44 and the image signal input from the outside (or selects either the drawing signal or the image signal). Then, the image signal distribution unit 46 applies the combined signal (or the selected signal) to one image display surface formed by each panel 10 of the plurality of plasma display devices 30 included in the multi-screen display device 130. In order to be displayed as a single image, it is appropriately divided according to the arrangement position of the plurality of plasma display devices 30, and the divided drawing signal (image signal) is transmitted to each of the plasma display devices 30.
  • FIG. 9 includes four plasma display devices 30a, 30b, 30c, and 30d arranged in a matrix of 2 rows and 2 columns, and is simulated by four image display surfaces arranged on the same plane.
  • 1 shows a multi-screen display device 130 having one image display surface.
  • the multi-screen display device 130 appropriately inputs a plurality of image signals transmitted from the image signal distribution unit 46 to each of the plurality of plasma display devices 30, and is configured in a pseudo manner by the plurality of panels 10.
  • One image is displayed on one image display surface. In this way, the drawing input by handwriting with the light pen 50 is combined with the image based on the image signal (or alone) and displayed on the multi-screen display device 130.
  • the light pen 50 may be provided with a switch for switching between the “drawing” mode and the “erasing” mode.
  • the trace of the light pen 50 shown on the panel 10 is traced with the light pen 50 again, so that the drawing signal stored in the image memory 47 can be partially or totally. You may comprise so that it may erase
  • FIG. 10 is a diagram schematically showing an example of each circuit block of the plasma display device 30 constituting the multi-screen display device 130 in the embodiment of the present invention.
  • the plurality of plasma display devices 30a, 30b, 30c, and 30d constituting the multi-screen display device 130 have the same configuration except for the arrangement position and the driving voltage waveform generated in the coordinate detection subfield. Therefore, hereinafter, the plasma display device 30a will be described, and description of the other plasma display devices 30b, 30c, and 30d will be omitted.
  • the plasma display device 30a includes a panel 10a and a drive circuit that includes a plurality of subfields in one field and drives the panel 10a.
  • the drive circuit includes an image signal processing circuit 31a, a data electrode drive circuit 32a, a scan electrode drive circuit 33a, a sustain electrode drive circuit 34a, a timing generation circuit 35a, and a power supply circuit (not shown) that supplies power necessary for each circuit block. ).
  • the drawing signal (image signal) output from the drawing apparatus 40 and the timing signal supplied from the timing generation circuit 35a are input to the image signal processing circuit 31a.
  • the image signal processing circuit 31a represents each gradation value (one field) of red, green, and blue in each discharge cell based on the drawing signal (image signal). Tone value) is set.
  • the image signal processing circuit 31a uses the red, green, and blue gradation values set for each discharge cell as image data indicating lighting / non-lighting for each subfield (light emission / non-light emission is “1” of the digital signal). , Data corresponding to “0”), and output the image data (red image data, green image data, and blue image data).
  • the timing generation circuit 35a separates a horizontal synchronization signal and a vertical synchronization signal from a signal transmitted as an image signal, and generates various timing signals for controlling the operation of each circuit block based on the horizontal synchronization signal and the vertical synchronization signal. appear.
  • the generated timing signal is supplied to each circuit block (data electrode drive circuit 32a, scan electrode drive circuit 33a, sustain electrode drive circuit 34a, image signal processing circuit 31a, etc.).
  • the data electrode driving circuit 32a Based on the image data output from the image signal processing circuit 31a and the timing signal supplied from the timing generation circuit 35a, the data electrode driving circuit 32a performs the writing periods Pw1 to Pw1 of the subfields SF1 to SF8 which are image display subfields.
  • the writing period Pwo of Pw8 and the display device identification subfield SFao the writing pulse of the voltage Vd is detected
  • the y coordinate detection period Pay of the y coordinate detection subfield SFay the y coordinate detection voltage Vdy is detected
  • the x coordinate detection of the x coordinate detection subfield SFax is detected.
  • an x-coordinate detection pulse having a voltage Vdx is applied to each data electrode D1 to Dm.
  • Sustain electrode drive circuit 34a includes a sustain pulse generation circuit and a circuit (not shown in FIG. 10) for generating voltage Ve, and generates each drive voltage waveform based on a timing signal supplied from timing generation circuit 35a.
  • the voltage is applied to each of the sustain electrodes SU1 to SUn.
  • the sustain pulse of the voltage Vs is applied.
  • the voltage Vso in the present embodiment, the voltage Vs Display device identification pulses Va2 and Va4
  • the initialization period of the display device identification subfield SFao In the initialization period Py and the y coordinate detection period Pay of the Pio and address period Pwo, the y coordinate detection subfield SFay, and the initialization period Pix and the x coordinate detection period Pax of the x coordinate detection subfield SFax, the voltage Ve is maintained. Apply to SUn.
  • Scan electrode drive circuit 33a includes a ramp waveform voltage generation circuit, a sustain pulse generation circuit, and a scan pulse generation circuit (not shown in FIG. 10). Each drive voltage waveform is based on a timing signal supplied from timing generation circuit 35a. Is applied to each of scan electrodes SC1 to SCn.
  • the ramp waveform voltage generation circuit based on the timing signal, initializes Pi1 to Pi8 and sustain periods Pw1 to Pw8 of the subfields SF1 to SF8, which are image display subfields, and an initialization period Pio of the display device identification subfield SFao.
  • the ramp waveform voltage is applied to the scan electrodes SC1 to SCn.
  • the sustain pulse generating circuit Based on the timing signal, the sustain pulse generating circuit generates sustain pulses in the sustain periods Ps1 to Ps8 of the subfields SF1 to SF8, which are image display subfields, and the voltage Vso (in the display device identification period Pao of the display device identification subfield SFao).
  • display device identification pulses Va1 and Va3 are applied to scan electrodes SC1 to SCn.
  • the scan pulse generation circuit includes a plurality of scan electrode driving ICs (scan ICs), and based on the timing signal, the writing periods Pw1 to Pw8 of the subfields SF1 to SF8 that are image display subfields and the display device identification subfield SFao
  • the writing period Pwo the scanning pulse of the voltage Vc and the voltage Va is detected
  • the y coordinate detection period Pay of the y coordinate detection subfield SFay the y coordinate detection pulse of the voltage Vc and voltage Vay is detected, and the x coordinate detection of the x coordinate detection subfield SFax.
  • the voltage Vc and the x coordinate detection voltage Vax are applied to the scan electrodes SC1 to SCn.
  • FIG. 11 is a circuit diagram schematically showing a configuration example of the scan electrode drive circuit 33a of the plasma display device 30a according to the embodiment of the present invention.
  • the scan electrode drive circuit 33a includes a sustain pulse generation circuit 55a, a ramp waveform voltage generation circuit 60a, and a scan pulse generation circuit 70a. Each circuit block operates based on the timing signal supplied from the timing generation circuit 35a, but details of the timing signal path are omitted in FIG. Hereinafter, the voltage input to the scan pulse generation circuit 70a is referred to as “reference potential A”.
  • Sustain pulse generation circuit 55a includes power recovery circuit 51a, switching element Q55, switching element Q56, and switching element Q59.
  • the power recovery circuit 51a includes a power recovery capacitor C10, a switching element Q11, a switching element Q12, a backflow prevention diode Di11, a diode Di12, a resonance inductor L11, and an inductor L12.
  • the power recovery circuit 51a recovers the power stored in the panel 10a from the panel 10a through LC resonance between the interelectrode capacitance of the panel 10a and the inductor L12, and stores it in the capacitor C10. Then, the recovered power is LC-resonated between the interelectrode capacitance of the panel 10a and the inductor L11, supplied again from the capacitor C10 to the panel 10a, and reused as power when driving the scan electrodes SC1 to SCn.
  • Switching element Q55 clamps scan electrodes SC1 to SCn to voltage Vs
  • switching element Q56 clamps scan electrodes SC1 to SCn to voltage 0 (V).
  • the switching element Q59 is a separation switch, and prevents a current from flowing back through a parasitic diode or the like of the switching element constituting the scan electrode drive circuit 33a.
  • the scan pulse generation circuit 70a sequentially applies scan pulses to the scan electrodes SC1 to SCn at the timings shown in FIGS.
  • Scan pulse generating circuit 70a outputs the output voltage of sustain pulse generating circuit 55a as it is during the sustain period. That is, the reference potential A is output to scan electrodes SC1 to SCn.
  • the voltage Vc and the x coordinate detection voltage Vax are generated and applied to the scan electrodes SC1 to SCn.
  • the ramp waveform voltage generation circuit 60a includes a Miller integration circuit 61a, a Miller integration circuit 62a, and a Miller integration circuit 63a, and generates the ramp waveform voltage shown in FIGS.
  • the voltage Vt may be set so that a voltage obtained by superimposing the voltage Vp on the voltage Vt is equal to the voltage Vi2.
  • Miller integrating circuit 61a when Miller integrating circuit 61a is operated, switching element Q72 and switching elements Q71L1 to Q71Ln are turned off, switching elements Q71H1 to Q71Hn are turned on, and the rising ramp waveform voltage generated in Miller integrating circuit 61a is turned on.
  • the up slope waveform voltage for the initialization operation can be generated by superimposing the voltage Vp of the power source E71 on the top.
  • Miller integrating circuit 62a includes transistor Q62, capacitor C62, resistor R62, and diode Di62 for backflow prevention. Then, by applying a constant voltage to the input terminal IN62 (giving a constant voltage difference between two circles shown as the input terminal IN62), an up-slope waveform voltage that gradually rises toward the voltage Vr ( Ascending waveform voltage generated at the end of the sustain periods Ps1 to Ps8 of the subfields SF1 to SF8, which are image display subfields, and at the end of the display device identification period Pao of the display device identification subfield SFao.
  • Miller integrating circuit 63a includes transistor Q63, capacitor C63, and resistor R63. Then, by applying a constant voltage to the input terminal IN63 (giving a constant voltage difference between two circles shown as the input terminal IN63), a downward ramp waveform voltage (gradiently decreasing toward the voltage Vi4 ( Initialization periods Pi1 to Pi8 of subfields SF1 to SF8 which are image display subfields, initialization period Pio of display device identification subfield SFao, initialization period Piy of y coordinate detection subfield SFay, and x coordinate detection subfield (Slope waveform voltage generated in each period of the initialization period Pix of SFax).
  • the switching element Q69 is a separation switch, and prevents a current from flowing backward through a parasitic diode or the like of the switching element constituting the scan electrode driving circuit 33a.
  • switching elements and transistors can be configured using generally known semiconductor elements such as MOSFETs and IGBTs. These switching elements and transistors are controlled by timing signals corresponding to the respective switching elements and transistors generated by the timing generation circuit 35a.
  • FIG. 12 is a circuit diagram schematically showing a configuration example of the sustain electrode drive circuit 34a of the plasma display device 30a in the embodiment of the present invention.
  • Sustain electrode drive circuit 34a includes sustain pulse generation circuit 80a and constant voltage generation circuit 85a. Each circuit block operates based on the timing signal supplied from the timing generation circuit 35a, but details of the timing signal path are omitted in FIG.
  • Sustain pulse generation circuit 80a includes power recovery circuit 81a, switching element Q83, and switching element Q84.
  • the power recovery circuit 81a includes a power recovery capacitor C20, a switching element Q21, a switching element Q22, a backflow prevention diode Di21, a diode Di22, a resonance inductor L21, and an inductor L22.
  • the power recovery circuit 81a recovers the power stored in the panel 10a from the panel 10a through LC resonance between the interelectrode capacitance of the panel 10a and the inductor L22, and stores it in the capacitor C20. Then, the recovered power is LC-resonated between the interelectrode capacitance of the panel 10a and the inductor L21, supplied again from the capacitor C20 to the panel 10a, and reused as power when driving the sustain electrodes SU1 to SUn.
  • Switching element Q83 clamps sustain electrodes SU1 to SUn to voltage Vs, and switching element Q84 clamps sustain electrodes SU1 to SUn to voltage 0 (V).
  • sustain pulse generating circuit 80a applies a sustain pulse of voltage Vs to sustain electrodes SU1 to SUn. Further, sustain pulse generating circuit 80a applies display device identification pulses Va2 and Va4 to sustain electrodes SU1 to SUn in display device identification period Pao of display device identification subfield SFao.
  • the constant voltage generation circuit 85a includes a switching element Q86 and a switching element Q87. Then, the constant voltage generation circuit 85a includes initialization periods Pi1 to Pi8 and writing periods Pw1 to Pw8 of the subfields SF1 to SF8 that are image display subfields, initialization period Pio and writing period of the display device identification subfield SFao.
  • the voltage Ve is applied to the sustain electrodes SU1 to SUn during the initialization period Piy and the y coordinate detection period Pay of the Pwo, y coordinate detection subfield SFay, and the initialization period Pix and the x coordinate detection period Pax of the x coordinate detection subfield SFax. To do.
  • these switching elements can be configured using generally known elements such as MOSFETs and IGBTs. These switching elements are controlled by timing signals corresponding to the respective switching elements generated by the timing generation circuit 35a.
  • FIG. 13 is a circuit diagram schematically showing a configuration example of the data electrode driving circuit 32a of the plasma display device 30a in the embodiment of the present invention.
  • the data electrode drive circuit 32a operates based on the image data supplied from the image signal processing circuit 31a and the timing signal supplied from the timing generation circuit 35a. However, in FIG. 13, details of the paths of these signals are omitted. To do.
  • the data electrode drive circuit 32a includes switching elements Q91H1 to Q91Hm and switching elements Q91L1 to Q91Lm. Then, voltage 0 (V) is applied to data electrode Dj by turning on switching element Q91Lj, and voltage Vd is applied to data electrode Dj by turning on switching element Q91Hj. In this way, the data electrode driving circuit 32a outputs the writing pulse of the voltage Vd in the writing periods Pw1 to Pw8 of the subfields SF1 to SF8 that are image display subfields and the writing period Pwo of the display device identification subfield SFao.
  • FIG. 14 is a diagram schematically illustrating an example of a drive voltage waveform when the position coordinates of the light pen 50 are detected in the multi-screen display system 100 according to the embodiment of the present invention.
  • FIG. 14 shows an operation of detecting the position coordinates of the light pen 50 using the drive voltage waveform generated in the plasma display device 30a.
  • the operation of the plasma display devices 30b, 30c, and 30d is based on the movement direction of the first light emission line displayed in the y coordinate detection subfield SFy or the movement direction of the second light emission line displayed in the x coordinate detection subfield SFx.
  • the operation when calculating the coordinates is the same, and thus the description thereof is omitted.
  • the time Toy from the time to1 to the time ty0 is determined in advance, and the time Tox from the time to1 to the time tx0 is predetermined.
  • the timing detection unit 54 can generate a coordinate reference signal having rising edges at each of the time ty0 and the time tx0 and output the coordinate reference signal to the coordinate calculation unit 56 as shown in FIG. it can.
  • the light emission intervals are sequentially five times of time To0, time TA1, time TA2, and time TA3 (from the light receiving element 52 based on these light emissions).
  • the time to1 is specified, and it is specified that the light pen 50 is on the panel 10a of the plasma display device 30a.
  • first light emission line extended in the first direction (row direction) sequentially moves in the second direction (column direction).
  • the y coordinate detection pattern a is displayed on the panel 10a.
  • the first light emission line Ly that sequentially moves from the upper end (first row) to the lower end (nth row) of the image display region is displayed in the image display region of the panel 10a.
  • the tip of the light pen 50 is in contact with (or close to) the “coordinate (x, y)” of the image display surface of the panel 10a, the time when the first light emission line Ly passes through the coordinate (x, y).
  • the light receiving element 52 of the light pen 50 receives light emitted from the first light emitting line Ly.
  • the light pen 50 outputs a light reception signal indicating that the light receiving element 52 has received the light emission of the first light emission line Ly at time tyy.
  • the tip of the light pen 50 is in contact with (or close to) the “coordinates (x, y)” of the image display surface of the panel 10a, the time when the second light emitting line Lx passes the coordinates (x, y) At txx, the light receiving element 52 of the light pen 50 receives the light emitted from the second light emitting line Lx. Thereby, as shown in FIG. 14, the light pen 50 outputs a light receiving signal indicating that the light receiving element 52 has received the light emitted from the second light emitting line Lx at time txx.
  • the coordinate calculation unit 56 shown in FIG. 9 is based on the coordinate reference signal output from the timing detection unit 54 and the light reception signal output from the light receiving element 52 in the y coordinate detection period Pay of the y coordinate detection subfield SFay.
  • the time Tyy from the time ty0 to the time tyy is measured using the counter provided for.
  • the time Tyy is divided by the time Ty1 in the arithmetic circuit provided inside. The division result is the y coordinate of the position of the light pen 50 in the image display area of the panel 10a.
  • the coordinate calculation unit 56 is provided internally based on the coordinate reference signal output from the timing detection unit 54 and the light reception signal output from the light receiving element 52 in the x coordinate detection period Pax of the x coordinate detection subfield SFax.
  • a time Txx from time tx0 to time txx is measured using a counter.
  • the time Txx is divided by the time Tx1 in the arithmetic circuit provided inside. The division result is the x coordinate of the position of the light pen 50 in the image display area of the panel 10a.
  • the coordinate calculation unit 56 in the present embodiment calculates the position (coordinates (x, y)) of the light pen 50 in the image display area of the multi-screen display device 130. Then, a drawing input by handwriting using the light pen 50 is displayed on the image display surface of the multi-screen display device 130.
  • FIG. 15 is a diagram schematically showing an example of the operation of the multi-screen display system 100 when detecting the position coordinates of the light pen 50 in the embodiment of the present invention.
  • the multi-screen display device 130 shown in the present embodiment has the y-coordinate detection pattern and x displayed in the y-coordinate detection subfield SFy according to the arrangement position of the plasma display device 30 in the multi-screen display device 130.
  • the x-coordinate detection pattern displayed in the coordinate detection subfield SFx is changed for each plasma display device 30.
  • the first light emission line Ly (one pixel row that emits light).
  • the first emission line Ly Displays a y-coordinate detection pattern a that sequentially moves from the upper end to the lower end of the image display area on the panels 10a and 10b.
  • the first emission line Ly is sequentially from the lower end portion to the upper end portion of the image display area.
  • the moving y-coordinate detection pattern b is displayed on the panels 10c and 10d.
  • the second emission line Lx (one pixel that emits light).
  • the x-coordinate detection pattern a in which the column) sequentially moves from the left end to the right end of the image display area is displayed on the panels 10a and 10c.
  • the second light emission line Lx sequentially moves from the right end portion to the left end portion of the image display area in the x coordinate detection subfield SFx.
  • the x coordinate detection pattern b to be displayed is displayed on the panels 10b and 10d.
  • the multi-screen display device 130 is configured by 16 plasma display devices 30 arranged in a matrix of 4 rows and 4 columns, the first and third rows in the y coordinate detection subfield SFy.
  • the panel 10 displays the y-coordinate detection pattern a on the arranged plasma display device 30 and the y-coordinate detection pattern b on the plasma display device 30 arranged on the second and fourth rows.
  • the plasma display device 30 arranged in the first and third columns displays the x-coordinate detection pattern a
  • the plasma display device 30 arranged in the second and fourth columns displays x.
  • a coordinate detection pattern b is displayed on the panel 10.
  • the first light emission lines Ly are sequentially formed from the upper end portion to the lower end portion of the image display area in the y coordinate detection subfield SFy.
  • the first light emission line Ly from the lower end of the image display area in the y-coordinate detection subfield SFy.
  • the y coordinate detection pattern b that sequentially moves to the upper end portion is displayed on the panel 10.
  • the x-coordinate detection pattern a in which the second light emission line Lx sequentially moves from the left end portion to the right end portion of the image display area in the x-coordinate detection subfield SFx.
  • the x-coordinate detection pattern in which the second emission line Lx sequentially moves from the right end portion to the left end portion of the image display area in the x-coordinate detection subfield SFx. b is displayed on the panel 10.
  • the y coordinate detection pattern b may be displayed on the plasma display device 30 arranged in the odd-numbered rows, and the y coordinate detection pattern a may be displayed on the plasma display device 30 arranged in the even-numbered rows.
  • the x coordinate detection pattern b may be displayed on the plasma display device 30 arranged in the odd column, and the x coordinate detection pattern a may be displayed on the plasma display device 30 arranged in the even column.
  • the moving direction of the second light emitting line Lx when displaying the pattern is changed. That is, in multi-screen display device 130 in the present embodiment, the movement direction of first light-emitting line Ly in the y-coordinate detection pattern or the x-coordinate detection pattern between two plasma display devices 30 arranged adjacent to each other. Any one of the moving directions of the second light emitting lines Lx in the directions is opposite to each other. This is due to the following reason.
  • FIG. 16 is a diagram schematically illustrating an example of an operation when handwriting input is performed with the light pen 50 in the multi-screen display system 100 according to the embodiment of the present invention.
  • the drawing unit 44 draws a drawing pattern (with a color and size corresponding to the drawing mode S0 (t) around the pixel corresponding to the position coordinates (x (t), y (t)) calculated by the coordinate calculation unit 56. For example, a drawing signal of a pattern such as a white circle (hereinafter referred to as “cursor 101”) is generated.
  • the drawing signals are sequentially written in the image memory 47 of the drawing unit 44, and the drawing signals during the period in which the contact switch 53 is on are stored in the image memory 47. Then, the plasma display device 30 displays an image based on the drawing signal stored in the image memory 47 of the drawing unit 44 on the panel 10.
  • the cursor 101 When the user moves the tip of the light pen 50 from the position B1 of the panel 10a to the position B2 of the panel 10b, the cursor 101 also moves from the position B1 to the position B2 according to the operation.
  • the light receiving element 52 of the light pen 50 receives the light emission of the panel 10a for the display device identification period Po of the display device identification subfield SFo, and the y coordinate detection subfield SFy.
  • the light pen 50 calculates the position coordinates on the assumption that the light pen 50 itself is on the panel 10a.
  • the multi-screen display device driven by a conventional method that is, the y-coordinate detection pattern a for each of the panels 10a and 10b (the first emission line is sequentially line by line from the upper end to the lower end of the image display area of the panel).
  • the y-coordinate detection pattern a a pattern in which the second light-emitting line sequentially moves one column at a time from the left end to the right end of the panel image display area
  • the point (0) is the left end of the image display surface for both panels 10a and 10b
  • the reference point (0) for the y coordinate is the upper end of the image display surface for both panels 10a and 10b. That is, the coordinate reference point (0, 0) is the upper left corner of the image display surface in both panels 10a and 10b.
  • the position coordinate calculated by the coordinate calculation unit 56 as the position B2 is not significantly different from the y coordinate of the original position B2 with respect to the y coordinate.
  • the x coordinate of the position coordinate calculated by the coordinate calculation unit 56 as the position B2 is the position of the panel 10a.
  • the position is close to the reference point (0) of the x coordinate. Since this is a position close to the left end portion of the panel 10a, the position coordinate calculated by the coordinate calculation unit 56 as the position B2 is the position B3 of the panel 10a, and the cursor 101 is displayed at a position significantly different from the original position B2. Will be.
  • the x-coordinate detection pattern a is displayed on the panel 10a, and the x-coordinate detection pattern b (the second emission line is 1 from the right end to the left end of the panel image display area). Displays a pattern that moves sequentially column by column). Therefore, the reference point (0) of the x coordinate is the left end portion of the image display surface in the panel 10a, and the right end portion of the image display surface in the panel 10b.
  • the light receiving element 52 receives light emitted from the panel 10a for the display device identification period Po of the display device identification subfield SFo, and the x coordinate detection subfield SFx.
  • the x-coordinate detection period Px even if the panel 10b emits light, the original position B2 is farthest from the x-coordinate reference point (0) of the panel 10b.
  • the x coordinate of the calculated position coordinate is the farthest position from the reference point (0) of the x coordinate of the panel 10a.
  • the position coordinate calculated by the coordinate calculation unit 56 as the position B2 is in the vicinity of the position B1 of the panel 10a, and the cursor 101 is positioned relatively close to the original position B2. Will be displayed.
  • the light receiving element 52 receives light emitted from the panel 10b for the display device identification period Po of the display device identification subfield SFo, and y
  • the y coordinate detection period Py of the coordinate detection subfield SFy and the x coordinate detection period Px of the x coordinate detection subfield SFx assuming that the panel 10d emits light, the y coordinate detection pattern a and the x coordinate detection are performed for both the panels 10b and 10d.
  • the position coordinate calculated by the coordinate calculation unit 56 as the position C2 is the position C3 of the panel 10b, and the cursor 101 is displayed at a position significantly different from the original position B2.
  • the y-coordinate detection pattern a is displayed on the panel 10b, and the y-coordinate detection pattern b (the first emission line is 1 from the lower end to the upper end of the image display area of the panel). Displays a pattern that moves sequentially line by line). Therefore, for example, the light receiving element 52 receives the light emission of the panel 10b for the display device identification period Po of the display device identification subfield SFo, and receives the light emission of the panel 10d for the y coordinate detection period Py of the y coordinate detection subfield SFy. Even so, the y coordinate of the position coordinate calculated by the coordinate calculation unit 56 as the position C2 is the farthest position from the reference point (0) of the y coordinate of the panel 10b. Therefore, the position coordinate calculated by the coordinate calculation unit 56 as the position C2 is in the vicinity of the position C1 of the panel 10b, and the cursor 101 is displayed at a position relatively close to the original position C2.
  • the above is the moving direction of the first light emission line Ly when displaying the y-coordinate detection pattern and the first coordinate when displaying the x-coordinate detection pattern according to the arrangement position of the plasma display device 30 in the multi-screen display device 130. This is because the moving direction of the second light emitting line Lx is changed.
  • the light pen 50 may have a pointer function as follows.
  • the movement locus during that time is not displayed on the panel 10
  • the cursor indicating the current position of the tip of the light pen 50 is displayed. 101 is displayed on the panel 10.
  • the light pen 50 can be used as a pointer. Furthermore, if a lens is attached to the tip of the light pen 50, the light receiving element 52 can sufficiently receive the light emitted from the panel 10 even if the light pen 50 is located farther from the panel 10. The light pen 50 can also be used as a pointer from a position farther away.
  • the configuration in which the contact switch 53 is attached to the tip of the light pen 50 has been described.
  • a manual switch corresponding to the contact switch 53 is provided on the side surface of the light pen 50, and the user switches the switch. You may comprise so that operation of ON / OFF of can be operated.
  • the light pen 50 may include both the contact switch 53 and the manual switch.
  • display device identification discharge is generated four times at predetermined time intervals (for example, time To1, time To2, and time To3) in display device identification subfield SFo will be described.
  • time To1, time To2, and time To3 predetermined time intervals
  • the configuration in which the display device identification subfield SFo, the y coordinate detection subfield SFy, and the x coordinate detection subfield SFx are provided in each field has been described.
  • the present invention is not limited to this configuration. is not.
  • the configuration may be such that those subfields are generated at a rate of once in a plurality of fields.
  • the drawing device 40 and the light pen 50 may be electrically connected by an electric cable or the like, and a signal may be transmitted and received between the light pen and the drawing device via the electric cable.
  • each subfield is not limited to the order shown in the embodiment.
  • the y coordinate detection subfield SFy may be generated after the x coordinate detection subfield SFx.
  • an image display subfield may be generated after the y coordinate detection subfield SFy and the x coordinate detection subfield SFx.
  • a display device identification subfield SFo may be generated between the y coordinate detection subfield SFy and the x coordinate detection subfield SFx, and the display device identification subfield SFo is set after the x coordinate detection subfield SFx. It may occur.
  • each operation has been described by taking a plasma display device using a plasma display panel as an image display unit as an example of the image display device.
  • the image display device is not limited to the plasma display device.
  • the same effect as that described above can be obtained by applying the same configuration as that described above.
  • the y-coordinate detection pattern is a single pixel row that emits light from the first light-emitting line.
  • the first light-emitting line may be a plurality of pixel rows that emit light.
  • the y-coordinate detection pattern may be a pattern in which the first light emission line sequentially moves every other row (or every other row). In these configurations, the time required for the y-coordinate detection subfield SFy can be shortened compared to the configuration shown in the present embodiment.
  • the x-coordinate detection pattern is one pixel column that emits the second emission line, but the second emission line may be a plurality of pixel columns that emit light.
  • the x-coordinate detection pattern may be a pattern in which the second light emission lines sequentially move every other row (or every other row). In these configurations, the time required for the x-coordinate detection subfield SFx can be shortened as compared with the configuration shown in the present embodiment.
  • one field has a plurality of image display subfields and a subfield for detecting position coordinates.
  • the present invention is not limited to this configuration. is not.
  • one field may be composed of only the image display subfield.
  • the forced initializing operation has been described as an initializing operation that forcibly generates initializing discharge in all the discharge cells in the image display area of the panel. It is not limited to this configuration.
  • the forced initializing waveform is applied only to some discharge cells in the image display area of the panel and the initializing discharge is forcibly generated only in the discharge cells. It shall be included in the conversion operation.
  • the drawing device 40 is provided independently of the plasma display device.
  • a computer connected to the plasma display device corresponds to the drawing device 40.
  • a rendering signal is created using the computer.
  • the present invention is not limited to this configuration.
  • the drawing device 40 may be provided as a single device, or the drawing device 40 may be provided in the plasma display device 30.
  • the drive voltage waveforms shown in FIGS. 4, 5, 6, 7, 8, and 14 are merely examples in the embodiment of the present invention, and the present invention is not limited to these drive voltage waveforms. It is not limited to.
  • circuit configurations shown in FIGS. 9, 10, 11, 12, and 13 are merely examples in the embodiment of the present invention, and the present invention is not limited to these circuit configurations. It is not a thing.
  • Each circuit block shown in the embodiment of the present invention may be configured as an electric circuit that performs each operation shown in the embodiment, or substantially the same as each operation shown in the embodiment.
  • a microcomputer or a computer programmed to operate may be used.
  • the specific numerical values shown in the embodiment of the present invention are set based on the characteristics of the panel 10 having a screen size of 50 inches and the number of display electrode pairs 14 of 1024. It is just an example.
  • the present invention is not limited to these numerical values, and each numerical value is desirably set optimally in accordance with panel specifications, panel characteristics, plasma display device specifications, and the like. Each of these numerical values is allowed to vary within a range where the above-described effect can be obtained.
  • the present invention is useful as a multi-screen display device, a multi-screen display device driving method, and a multi-screen display system because the position coordinates of the light pen can be detected with reduced errors.

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Abstract

La présente invention a pour objet de détecter les coordonnées de position d'un photostyle (50) avec une erreur réduite. A cette fin, l'invention concerne un dispositif (130) d'affichage à écrans multiples dans lequel une pluralité de dispositifs (30a, 30b, 30c, 30d) d'affichage d'images partielles est disposée sous la forme d'une matrice et caractérisée en ce que, pour deux dispositifs d'affichage d'images partielles disposés côte à côte, la direction de mouvement d'une première ligne d'émission lorsqu'un motif de détection suivant la coordonnée y est affiché sur une unité d'affichage d'images dans un sous-champ de détection suivant la coordonnée y et / ou la direction de mouvement d'une deuxième ligne d'émission lorsqu'un motif de détection suivant la coordonnée x est affiché sur une unité d'affichage d'images dans un sous-champ de détection suivant la coordonnée x, sont rendues opposées l'une à l'autre.
PCT/JP2013/001382 2012-05-09 2013-03-06 Dispositif d'affichage à écrans multiples, procédé de pilotage d'un dispositif d'affichage à écrans multiples et système d'affichage à écrans multiples WO2013168327A1 (fr)

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CN103677713A (zh) * 2013-12-09 2014-03-26 联想(北京)有限公司 一种信息处理方法及电子设备
CN105336289A (zh) * 2015-10-30 2016-02-17 京东方科技集团股份有限公司 一种拼接控制方法、装置以及拼接屏系统
CN105979168A (zh) * 2016-07-18 2016-09-28 合肥盈川信息技术有限公司 一种新型视频拼接数据分配系统
CN106101580A (zh) * 2016-07-18 2016-11-09 合肥盈川信息技术有限公司 一种三维坐标系视频拼接多窗口数据分配方法
CN106101581A (zh) * 2016-07-18 2016-11-09 合肥盈川信息技术有限公司 一种三维坐标系视频拼接数据分配方法
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CN106210563A (zh) * 2016-07-18 2016-12-07 合肥盈川信息技术有限公司 一种三维坐标系视频拼接数据分配系统
CN106201405A (zh) * 2016-07-18 2016-12-07 合肥盈川信息技术有限公司 一种新型三维坐标系视频数据分配系统
CN110211534A (zh) * 2019-05-20 2019-09-06 武汉华星光电半导体显示技术有限公司 图像显示方法、装置、控制器及存储介质
CN110941410A (zh) * 2019-11-20 2020-03-31 广州视源电子科技股份有限公司 设备的拼接系统和方法
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CN103677713A (zh) * 2013-12-09 2014-03-26 联想(北京)有限公司 一种信息处理方法及电子设备
CN103677713B (zh) * 2013-12-09 2017-08-29 联想(北京)有限公司 一种信息处理方法及电子设备
US11643465B2 (en) 2015-08-11 2023-05-09 WuXi Biologics Ireland Limited Anti-PD-1 antibodies
CN105336289A (zh) * 2015-10-30 2016-02-17 京东方科技集团股份有限公司 一种拼接控制方法、装置以及拼接屏系统
WO2017071374A1 (fr) * 2015-10-30 2017-05-04 京东方科技集团股份有限公司 Procédé et dispositif de commande de jonction et système d'écran joint
CN106168893A (zh) * 2016-07-18 2016-11-30 合肥盈川信息技术有限公司 一种视频拼接数据分配系统
CN106131458A (zh) * 2016-07-18 2016-11-16 合肥盈川信息技术有限公司 一种新的三维坐标系视频拼接多窗口数据分配方法
CN106210566A (zh) * 2016-07-18 2016-12-07 合肥盈川信息技术有限公司 一种视频拼接多窗口数据分配方法
CN106210563A (zh) * 2016-07-18 2016-12-07 合肥盈川信息技术有限公司 一种三维坐标系视频拼接数据分配系统
CN106201405A (zh) * 2016-07-18 2016-12-07 合肥盈川信息技术有限公司 一种新型三维坐标系视频数据分配系统
CN106101581A (zh) * 2016-07-18 2016-11-09 合肥盈川信息技术有限公司 一种三维坐标系视频拼接数据分配方法
CN106101580A (zh) * 2016-07-18 2016-11-09 合肥盈川信息技术有限公司 一种三维坐标系视频拼接多窗口数据分配方法
CN105979168A (zh) * 2016-07-18 2016-09-28 合肥盈川信息技术有限公司 一种新型视频拼接数据分配系统
CN110211534A (zh) * 2019-05-20 2019-09-06 武汉华星光电半导体显示技术有限公司 图像显示方法、装置、控制器及存储介质
CN110941410A (zh) * 2019-11-20 2020-03-31 广州视源电子科技股份有限公司 设备的拼接系统和方法

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