WO2007141847A1

WO2007141847A1 - Display device

Info

Publication number: WO2007141847A1
Application number: PCT/JP2006/311381
Authority: WO
Inventors: Hitoshi Hirakawa; Manabu Ishimoto; Kenji Awamoto
Original assignee: Shinoda Plasma Co., Ltd.
Priority date: 2006-06-07
Filing date: 2006-06-07
Publication date: 2007-12-13
Also published as: JPWO2007141847A1

Abstract

In a display device (102), a plurality of pairs of display electrodes (X1, Y1)-(Xn, Yn) of a plurality of units are electrically connected to provide a length of the plurality of units. One scanning drive circuit (700) applies a scanning voltage to the display electrodes (Y1-Yn) on one side among the display electrode pairs, and applies a sustaining voltage pulse to the display electrodes (Y1-Yn), on a boundary between two adjacent units (321, 322) among the units.

Description

Specification

Display device

Technical field

TECHNICAL FIELD [0001] The present invention relates to a large display device, and more particularly to electrical connection of a scanning pulse circuit of a large display device having a plurality of plasma 'tube' array forces each having a phosphor layer therein.

Background art

[0002] Plasma display panels (PDPs) emit light by exciting phosphors with ultraviolet light of 147nm, which generates plasma discharge in a closed discharge space of a large number of vertical and horizontal small cells, and discharges plasma power. Let The cell space is formed between two stacked glass sheets. On the other hand, in a plasma 'tube' array (PTA), a phosphor layer is formed in an elongated glass' tube or a support member on which the phosphor layer is formed is inserted to form a large number of cell spaces in the tube. . By arranging a large number of such plasma tubes, for example, a large display screen of 6 m × 3 m can be formed. In a normal plasma tube array, a sustain voltage pulse for the X electrode is printed from the X electrode driver device, and a scan driver for the Y electrode driver device from the sustain voltage pulse circuit for the Y electrode of the Y electrode driver device. A sustain voltage pulse for the Y electrode is applied through the circuit.

[0003] Japanese Unexamined Patent Application Publication No. 2004-178854 (Patent Document 1) describes an arc tube array type display device. The arc tube array type display device includes an arc tube array that constitutes a display screen, and supports the arc tube array from the display surface side and the back side, and a number of electrodes for applying voltage to the arc tube. Supports formed in stripes on the array facing surface, terminal electrode lead-out portions provided on the support outside the display area of the display screen, and relay electrode lead-out portions provided on the support in the display area of the display screen And a first driver for applying a voltage to the terminal electrode lead-out portion and a second driver for applying a voltage to the relay electrode lead-out portion. Accordingly, even a display device having a large screen size has an electrode structure that does not cause a voltage drop, thereby preventing uneven brightness of the display device.

Patent Document 1: Japanese Patent Laid-Open No. 2004-178854 Disclosure of the invention

Problems to be solved by the invention

[0004] In a large-sized display device having a plurality of juxtaposed plasma / tube / array powers equipped with driving circuits for each X electrode and Y electrode, the length of the display electrode increases as the size increases. Display electrode resistance, inductance, and z or capacitance components increase. If the inductance of the display electrode from the position where the pulse voltage is applied to the position of the cell is increased, the waveform and effective voltage value of the applied voltage pulse for address discharge and sustain discharge may be affected. If the rise delay time of the address voltage pulse is increased due to the distortion of the pulse waveform, the duration of the effective applied voltage pulse applied to the light emitting cell is shortened, so that the cell is likely to fail the sustain discharge. In addition, when the resistance of the display electrode to the position of the cell far from the applied position force of the Nors voltage increases, the voltage drop increases and the difference in effective voltage between the cells increases, resulting in luminance variations between the cells. It becomes easy.

In order to prevent such an increase in the inductance and resistance of the display electrode, the width or thickness of the display electrode is usually increased, but the light shielding rate of the display electrode is increased, and thus the luminous efficiency of the display device is increased. As a result, the display image quality may be lowered.

[0006] The inventors have arranged a scanning circuit for a multi-unit plasma tube array and a large-sized display device having a plurality of juxtaposed multi-unit plasma tube arrays having a drive circuit. It has been recognized that designing the connection in an advantageous manner can greatly reduce the address discharge failure and the associated sustain discharge failure in each unit, thereby reducing the display brightness unevenness.

An object of the present invention is to reduce luminance unevenness in a large display device composed of a plurality of units.

[0008] Another object of the present invention is to reduce address discharge failures in a large display device composed of a plurality of units.

[0009] Still another object of the present invention is to prevent a synchronization deviation of scan pulses of a plurality of scan drive circuits of a large display device composed of a plurality of units.

Means for solving the problem [0010] According to a feature of the present invention, the display device includes a phosphor layer formed therein, a discharge gas sealed therein, and a plurality of gas discharge tubes each having a plurality of light emitting points in the longitudinal direction. A plurality of pairs of display electrodes are arranged on the display surface side of the plurality of gas discharge tubes, and a plurality of signal electrodes are arranged on the back side of the plurality of gas discharge tubes. The plurality of pairs of display electrodes of the plurality of units are electrically connected to have a length corresponding to the plurality of units. The display device applies a scanning voltage to one display electrode of each of the plurality of pairs of display electrodes of the plurality of units in the first period, and displays one of the display electrodes in the second period. At least one scan driving circuit for applying a sustain voltage pulse to the electrodes, and in the second period, the other of the display electrode pairs of the plurality of pairs of display electrodes of the plurality of units. And at least one sustain voltage circuit for applying a sustain voltage pulse potential to the display electrode. The single scan driver circuit is located at the boundary between two adjacent units in the unit! Then, a scanning voltage is applied to one of the display electrode pairs of the plurality of display electrodes, and a sustain voltage pulse is applied to the one display electrode.

[0011] According to another feature of the invention, another scan drive circuit in the plurality of scan drive circuits includes a boundary between the other two adjacent units in the plurality of units. In this case, a scanning voltage is applied to one of the display electrode pairs of the plurality of display electrodes, and a sustain voltage pulse is applied to the one display electrode. The scanning voltage pulse of each of the one scanning driving circuit and the other scanning driving circuit has a period between adjacent scanning voltage pulses, in order to prevent synchronization with the other scanning voltage pulse. Have.

The invention's effect

[0012] According to the present invention, it is possible to reduce luminance unevenness in a large display device composed of a plurality of units, to reduce address discharge failures, and to reduce a plurality of large display devices composed of a plurality of units. Therefore, it is possible to prevent the scan pulse from being out of synchronization in the scan drive circuit.

BEST MODE FOR CARRYING OUT THE INVENTION

An embodiment of the present invention will be described with reference to the drawings. Similar components in drawings Are given the same reference numbers.

[0014] FIG. 1 illustrates a schematic partial structure of a unit 300 of an array of plasma tubes or gas discharge tubes 11R, 11G and 11B, typically for a color display. In FIG. 1, the unit 300 of the plasma 'tube' array (PTA) consists of an array of transparent elongated color 'plasma' tubes 11R, 11G and 11B arranged in parallel to each other, a transparent front support sheet. Front support substrate 31 with thin substrate force, transparent support substrate or thin with transparent or opaque back support substrate 32 with substrate force, multiple display electrode pairs or main electrode pair 2, and multiple signals Including the electrode or address electrode 3! / In FIG. 1, X represents a sustain electrode or X electrode of the display electrode 2, and Y represents a scan electrode or Y electrode of the display electrode 2. R, G, and B indicate red, green, and blue emission colors of the phosphor. The support substrates 31 and 32 are made of, for example, flexible PET film or glass.

[0015] Elongated plasma 'tubes 11R, 11G, and 1 IB capillaries 20 are made of transparent insulators, such as borosilicate glass, Pyrex®, soda glass, quartz glass or zerodur, typically For example, the tube diameter is 2 mm or less, for example, the tube cross-sectional width is about lmm and the height is about 0.55 mm, the length is 300 mm or more, and the tube wall thickness is about 0.1 mm. Have

[0016] Support members on which the phosphor layers 4 of red, green, and blue (R, G, and B) are respectively formed are inserted and arranged on the rear side of the plasma 'tubes 11R, 11G, and 1IB. Discharged gas is introduced and both ends are sealed. On the inner surfaces of the plasma tubes 11R, 11G, and 11B, an electron emission film 5 having MgO force is formed. The phosphor layers R, G, B typically have a thickness in the range of about 10 m to about 50 μm.

[0017] The support member is made of an insulator such as borosilicate glass, Neurex (registered trademark), quartz glass, soda glass, lead glass, and the like as in the plasma tubes 11R, 11G, and 11B. A phosphor layer 4 is formed on the support member. The support member is an outer portion of the glass tube. After the phosphor paste is applied on the support member and baked to form the phosphor layer 4 on the support member, the support member is inserted into the glass tube. Can be arranged. As such phosphor paste, various phosphor pastes known in the art can be used. Togashi.

[0018] The electron emission film 5 generates electrons by collision with charged particles of the discharge gas. The phosphor layer 4 is excited by vacuum ultraviolet light generated by de-excitation of the discharge gas enclosed in the tube excited by applying a voltage to the display electrode pair 2, and generates visible light.

FIG. 2A shows a front-side support substrate 31 on which a plurality of transparent display electrode pairs 2 are formed. FIG. 2B shows a back side support substrate 32 on which a plurality of signal electrodes 3 are formed.

[0020] The signal electrode 3 is formed on the front surface, that is, the inner surface of the back side support substrate 32, and is provided along the longitudinal direction of the plasma tubes 11R, 11G, and 1IB. The pitch between the adjacent signal electrodes 3 is substantially the same as the width of each of the plasma tubes 11R, 11G, and 1IB, for example, lmm. The plurality of display electrode pairs 2 are formed on the back surface, that is, the inner surface of the front-side support substrate 31 in a well-known form, and are arranged in a direction perpendicular to the signal electrode 3. The width of the display electrode 2 is, for example, 0.75 mm, and the distance between the edges of each pair of display electrodes 2 is, for example, 0.4 mm. A distance serving as a non-discharge region or a non-discharge gap is secured between the display electrode pair 2 and the adjacent display electrode pair 2, and the distance is, for example, 1. lmm.

[0021] The signal electrode 3 and the display electrode pair 2 are brought into close contact with the lower outer peripheral surface portion and the upper outer peripheral surface portion of the plasma tubes 11R, 11G, and 11B when the PTA unit 300 is assembled. In order to improve the adhesion, an adhesive may be interposed between each electrode and the plasma tube surface to bond them.

[0022] When the PTA unit 300 is viewed from the front, the intersection of the signal electrode 3 and the display electrode pair 2 is a unit light emitting region. For display, one of the display electrode pairs 2 is used as the scan electrode Y, a selective discharge is generated at the intersection of the scan electrode Y and the signal electrode 3, and a light emitting region is selected. Using the wall charges formed on the inner surface of the tube, a display discharge is generated at the display electrode pair 2 and the phosphor layer emits light. The selective discharge is a counter discharge generated in the plasma tubes 11R, 11G, and 1IB between the scanning Y electrode and the signal electrode 3 facing each other in the vertical direction. Display discharge is generated in the plasma tubes 11R, 11G and 11B between a pair of display electrodes arranged in parallel on a plane. This is a surface discharge.

The display electrode pair 2 and the signal electrode 3 can generate a discharge in the discharge gas inside the tube by applying a voltage. In Fig. 1, the electrode structure of plasma 'tubes 11R, 11G and 11B is a structure in which three electrodes are arranged in one light emitting part, and the display discharge is generated by display electrode pair 2. However, the display electrode 2 and the signal electrode 3 may have a structure in which display discharge is generated. That is, the display electrode pair 2 may be one, and the display electrode 2 may be used as a scanning electrode to generate a selective discharge and a display discharge (opposite discharge) between the display electrode 2 and the signal electrode 3.ヽ.

FIG. 3 shows a cross-sectional structure perpendicular to the longitudinal direction of the tubes of the plasma “tube” array 11 of the PTA unit 300. In the PTA unit 300, the plasma 'tubes 11R, 11G, and 1IB have phosphor layers 4R, 4G, and 4B formed on the inner surfaces of the back support members 6R, 6G, and 6B, and have a cross-sectional width of 1 Omm, cross-sectional height 0.55mm, tube wall thickness 0. lmm, and length lm to 3m capillary force. As an example, the red phosphor 4 R includes a yttria-based ((Y. Ga) BO: Eu) material, and the green phosphor 4G is zinc silicate.

Three

The blue phosphor 4B contains BAM (BaMgAl 2 O: Eu).

2 4 10 17 materials included.

In FIG. 3, a back-side support substrate 32 is bonded to the bottom surfaces of the plasma tubes 11R, 11G, and 11B via an adhesive layer 34. Signal electrodes 3R, 3G, and 3B are arranged on the bottom surfaces of the plasma tubes 11R, 11G, and 11B and on the top surface of the back support substrate 32.

[0026] FIG. 4 shows the electrical characteristics of the X electrode driver circuit board 500, the Y electrode driver circuit 700, the address electrode driver circuit (AD) 46, and the driver control circuit 42 on the back of the PTA unit 300 of the normal display device 10. Indicate the ideal connection.

FIG. 5 shows a sustain voltage pulse circuit (SST) 60 and a scan pulse circuit (SCN) 70 for the Y electrode in an ordinary Y electrode driver circuit 700 connected to the PTA unit 300, and an X electrode driver circuit. A schematic configuration of the sustain voltage pulse circuit 50 for the X electrode on the substrate 500 is shown.

[0028] Sustain voltage pulse circuit (SST) 50 is connected to X electrodes XI to Xn via switches. It includes a bias voltage source Vs and a ground potential GND connected to the X electrode XI˜: Xn through the switch.

[0029] The sustain voltage pulse circuit (SST) 60 includes a high voltage pulse voltage source Vs connected to the scan pulse circuit (SCN) 70 via the switch, and a ground potential connected to the scan pulse circuit 70 via the switch. Includes GND. Scanning pulse circuit (SCN) 70 couples pulse voltage source Vs and ground potential GND to Y electrodes Yl to Yn. The scan pulse circuit 70 further includes a bias voltage source Vsc connected to the Υ electrodes Υ1 to Υη via the switch, and a scan pulse power source Vy connected to the Y electrodes Y1 to Yn via the switch. .

Referring to FIG. 4, in display device 10, n pairs of display electrodes 2 of PTA unit 300

The X electrodes (XI, Yl) to (Xn, Υη) are connected to the sustain voltage pulse circuit 50 for the X electrodes on the X electrode driver circuit board 500 via the flexible cable 500FC from the right side of the front support board 31. The left electrode of the front support substrate 31 is also connected to the scanning pulse circuit 70 on the high electrode circuit board 600 of the high electrode driver circuit 700 via the flexible cable 70FC. The sustain voltage pulse circuit 60 for the saddle electrode on the saddle electrode driver circuit 700 is connected to the scan pulse circuit 70 via a flexible cable. Α The m signal electrodes 3 Al to Am of the unit 300 are connected to the address driver circuit 46 through the flexible cable 46FC from the bottom side of the back support board 32. The X electrode driver circuit board 500 further includes a reset circuit (RST) 51. The Y high voltage circuit board 600 further includes a reset circuit (RST) 61. The driver control circuit 42 is connected to the X electrode driver circuit board 500, the Y electrode high voltage circuit board 600 of the Y electrode driver circuit 700, and the address' driver circuit 46. On the back surface of the PTA unit 300, a power source (PS) 40 that supplies power to the circuits 42, 46, 500, and 700 is further provided.

Next, an example of a driving method of a general plasma tube array type AC gas discharge display device will be described. One picture (video) is typically composed of one frame period. In interlaced scanning, one frame is composed of two fields, and in progressive scanning, one frame is composed of one field. . In addition, 30 frames per second are required for video display using the normal television system. Therefore, in the display by this kind of gas discharge display device 10, binary light emission control is used. In order to perform color reproduction with gradation, typically one field F is replaced with a set of q subfields SF. Often, the number of display discharges in each subfield SF is set by giving different weights such as 2 °, 2 ¹ , 2 ² , ^... N (= l + 2 ¹ + 2 ² + ^... + 2 ^q_1 ) levels of brightness can be set for each color of R, G, and B by combining light emission Z and no light emission in subfield units. According to such a field configuration, the field period Tf which is a field transfer period is divided into q subfield periods Tsf, and one subfield period Tsf is assigned to each subfield SF. Further, the subfield period Tsf is divided into a reset period TR for initialization, an address period TA for addressing, and a display period TS for light emission by sustain discharge. Typically, the length of the reset period TR and the address period TA is constant regardless of the weight, whereas the number of pulses in the display period TS is larger and the length of the display period TS is The greater the weight, the longer. In this case, the length of the subfield period Tsf is longer as the weight of the corresponding subfield SF is larger.

FIG. 6 exemplifies a schematic drive sequence of output drive voltage waveforms of the X electrode driver circuit board 500, the Y electrode driver circuit 700, and the address' driver circuit 42 in the normal display device 10. The waveform shown is an example, and the amplitude, polarity, and timing can be changed in various ways.

[0033] The order of reset period TR, address period TA, and sustain period TS is the same in q subfields SF, and the drive sequence is repeated for each subfield SF. In the reset period TR of each subfield SF, a negative polarity pulse Prxl and a positive polarity pulse Prx2 are sequentially applied to all the display electrodes X, and a positive polarity pulse Pry is applied to all the display electrodes Y. 1 and negative polarity pulse Pry2 are applied in order. Pulses Prxl, P ryl and Pry2 are ramp waveforms or blunt pulses whose amplitude gradually increases with the rate of change at which a microdischarge occurs. The first applied pulses Prxl and Pryl are applied once to generate moderate wall charges of the same polarity in all discharge cells regardless of light emission Z non-light emission in the previous subfield SF. Subsequently, by applying pulses Prx2 and Pry2 to the discharge cells where moderate wall charges are present, the wall charges are adjusted so as to be reduced to a level where they are not redischarged by the sustain pulses (erased state). The driving voltage applied to the cell is This is a composite voltage representing the difference in the amplitude of the pulses applied to the display electrodes X and Y.

In the address period ΤΑ, only a discharge cell that emits light forms a wall charge necessary for maintaining the discharge. With all display electrodes X and all display electrodes Υ biased to a predetermined potential, the negative polarity scan pulse is applied to the display electrode 対応 corresponding to the selected row for each row selection period (scanning time for one row). Apply Vy. Simultaneously with the row selection, the address pulse Va is applied only to the address electrode A corresponding to the selected cell that should generate the address discharge. That is, based on the subfield data Dsf for m columns of the selected row j, the address electrodes A to

1

Binary control of A potential for each scan line. As a result, in the selected cell, the display electrodes Y and m

Address discharge is generated between the address electrode A and the discharge tube. The display data written by the address discharge is stored in the form of wall charges on the cell inner wall of the discharge tube, and the surface discharge between the display electrodes X and Y is generated by the subsequent application of the sustain pulse.

In the sustain period TS, a sustain pulse Ps having a polarity (positive polarity in the example shown in the figure) that is first added to the wall charge generated in the previous address discharge to generate a sustain discharge is applied. Thereafter, the sustain pulse Ps is alternately applied to the display electrode X and the display electrode Y. The amplitude of the sustain pulse Ps is the sustain voltage Vs. By applying the sustain pulse Ps, a surface discharge is generated in the discharge cell in which a predetermined wall charge remains. The number of times that the sustain pulse Ps is applied corresponds to the weight of the subfield SF as described above. In order to prevent unnecessary counter discharge throughout the sustain period TS, the address electrode A may be biased to a voltage Vas having the same polarity as the sustain pulse Ps.

[0036] FIG. 7 shows an X electrode driver circuit board 500, a Y electrode driver circuit 700, and two address electrode driver circuits (AD) 46 at the back of two adjacent PTA units 301 and 302 of a normal display device 12. Show the electrical connection of.

The PTA unit 301 has a power supply 40, a driver control circuit 42, an address “driver circuit 46 for the PTA unit 301, and an X electrode driver circuit board 500 on the back surface thereof. The PTA unit 302 has an address driver circuit 46 and an electrode driver circuit 700 for the PTA unit 302 on the back surface thereof. The X electrodes of n display electrode pairs 2 (XI, Yl) to (Xn, Υη) of the PTA unit 301 are connected to the X electrode driver circuit board 500 from the right side of the front support board 31 via a flexible cable. . ΡΤΑ Display of η pair of unit 302 Υ electrodes of electrode pairs 2 (XI, Yl) to (Xn, Υη) are connected to the scanning pulse circuit 70 of the Υ electrode driver circuit 700 from the left side of the front support substrate 31 through a flexible cable. Each of the saddle units 301 and 302 has a width of Ly, and therefore the length of the display electrode pair 2 of each PTA unit has Ly. The length of Ly is, for example, a value in the range of 0.5 to 2. Om.

[0038] FIG. 8 shows the waveform of the scanning voltage pulse Vy along the longitudinal direction of the scanning electrode Yj of the display electrode pair 2 extending across two adjacent PTA units 301 and 302 of the display device 12. ing.

[0039] The scan voltage pulse Vy applied to the scan electrode Yj from the scan pulse circuit 70 in the scan period TS has a trapezoidal waveform close to a rectangle, but the longitudinal distance of the scan electrode Yj (D = 0 to D = As 2Ly) becomes longer, the inductance component causes more ringing, and the electric resistance has a more distorted waveform so that the height becomes smaller. Therefore, the partial force of the Y electrode on the boundary to which the scan voltage pulse of the scan pulse circuit 70 is applied is the farthest, and in the discharge cell of the scan electrode Yj portion in the PTA unit 301 at the position (D = 2Ly), the scan voltage pulse Address discharge may fail due to insufficient effective width and height of Vy. As a result, such a cell may fail to sustain discharge in the subsequent sustain period TS.

FIG. 9 shows an X electrode driver circuit board 500 on the back right side of the PTA unit 321, a Y electrode driver circuit 700 on the back left side of the PTA unit 321, and a PTA in the display device 102 according to the embodiment of the present invention. An example of the electrical connection of the two address electrode driver circuits (AD) 46 on the lower back side of units 321 and 322 is shown.

In display device 102, PTA units 321 and 322 have display electrode pairs 2 (XI, Yl) to (Xn, Υη) connected to each other at the boundary between them. X Display electrode pair 2 (XI, Υ1) to (Χη, Υη) of ΡΤΑ unit 321 has an X-electrode via the flexible cable 500FC. It is connected to the sustain voltage pulse circuit 50 (FIG. 4) for the X electrode on the driver circuit board 500. The Υ electrode is connected to the 支持 electrode driver from the part of the front support board 31 on the boundary between the left side of ΡΤΑ unit 321 and the right side of ΡΤΑ unit 322 via flexible cable 700FC. Connected to scan pulse circuit 70 of circuit 700. The Y electrode high voltage circuit board 600 of the Y electrode driver circuit 700 is connected to the scan pulse circuit 70 through a flexible cable. The m signal electrodes 3 Al to Am of the PTA unit 321 are flexible from the end of the rear support board 32 at the bottom of the PTA unit 321 to the flexible 'cable 46FC address of the PTA unit 321 to the driver circuit 46 Connected.

[0042] The driver control circuit 42 is connected to the X electrode driver circuit board 500, the Y electrode high voltage circuit board 600 of the Y electrode driver circuit 700, and the address' driver circuit 46 of the PTA unit 321 via respective cables. Connected. On the back of the PTA unit 321, there is a power supply (PS) 40 that supplies power to Sarakuko, circuits 42, 46, 500 and 700. The m signal electrodes 3 Al to Am of the PTA unit 322 are connected to the driver circuit 46 at the address of the PTA unit 322 via the flexible cable 46FC from the end of the back support board 32 at the bottom of the PTA unit 322. . The driver control circuit 42 is further connected to the address' driver circuit 46 of the PTA unit 322 via a cable indicated by a one-dot chain line.

[0043] The scanning pulse circuit 70 applies the scanning voltage pulse Vy in parallel to two portions of the length Ly of the 2Ly Y electrode at the boundary between the PTA units 321 and 322. The length of the Y electrode from is equal to the horizontal width Ly of each of the PTA units 321 and 322, which is half that of (2Ly) in FIG. Therefore, the partial force of the Y electrode on the boundary to which the scanning voltage pulse of the scan pulse circuit 70 is applied. In the discharge cell of the Y electrode portion in each of the PTA units 321 and 322 at the farthest position, the scan voltage pulse— The effective width and height of V y are sufficient, so the possibility of successful address discharge increases

[0044] FIG. 10 shows two X electrode driver circuit boards 500, PTA unit 321 on the right rear side of PTA unit 321 and the left rear side of PTA unit 327 in display device 104, according to another embodiment of the present invention. An example of the electrical connection of the Y electrode driver circuit 700 on the left side of the back side and the two address electrode driver circuits (AD) 46 on the lower side of the back side of the PTA units 321 and 322 is shown.

[0045] In the display device 104, the PTA units 321 and 327 are at the boundary between them. The display electrode pairs 2 (XI, Yl) to (Xn, Υη) are connected to each other. The electrical connection of the X electrode driver circuit board 500, the Υ electrode driver circuit 700, and the address electrode driver circuit (AD) 46 related to the ΡΤΑ unit 321 is the same as in FIG. The X electrodes of the η pair of display electrodes 2 (XI, Υ1) to (Χη, Υη) of the unit 327 are connected via the flexible cable 500FC from the end of the front support board 31 on the left side of the unit 327 Connected to the X electrode driver circuit board 500 on the back of the boot 327. M m signal electrodes 3 Al to Am of unit 327 are connected to the address and driver circuit 46 of the PTA unit 327 through the flexible cable 46FC from the end of the back support board 32 at the bottom of the PTA unit 327 . The driver control circuit 42 is further connected to the X electrode driver circuit board 500 and the address' driver circuit 46 of the PTA unit 322 via a cable indicated by a one-dot chain line.

[0046] The scanning pulse circuit 70 applies the scanning voltage pulse Vy to the two portions of the length Ly of the 2Ly Y electrode at the boundary between the PTA units 321 and 327. The length of the Y electrode is equal to the width Ly of each of the PTA units 321 and 327. Therefore, in the discharge cell of the Y electrode portion in each of the PTA units 321 and 327 located farthest from the Y electrode portion on the boundary where the scan voltage pulse of the scan pulse circuit 70 is applied, the scan voltage pulse Vy Since the effective width and height are sufficient, the possibility of successful address discharge is increased.

FIG. 11 shows an X electrode driver circuit board 500 on the rear right side of the PTA unit 33 and a Y electrode driver circuit on the rear left side of the PTA unit 331 in the display device 106 according to still another embodiment of the present invention. An example of the electrical connection of 700 and two address electrode driver circuits (AD) 46 on the lower back side of PTA units 331 and 332 is shown.

In display device 106, PTA units 331 and 332 have display electrode pairs 2 (XI, Yl) to (Xn,, η) connected to each other at the boundary between them. The electrical connection between the electrode driver circuit 700 and the address electrode driver circuit (AD) 46 related to the unit 331 is the same as that of the unit 321 in FIG. In this case, the X electrode driver circuit board 500 is placed on the back of the unit 331. Display of η pair of ΡΤΑ unit 332 The X electrode of electrode 2 (XI, Υ1) to (Χη, Υη) is connected to the left side of ΡΤΑ unit 331 and ΡΤΑ unit 3 The front support board 31 on the boundary between the right sides of 32 is connected to the X electrode driver circuit board 500 on the back side of the PTA unit 332 via the flexible cable 500 FC. The m signal electrodes 3 Al to Am of the PTA unit 332 are also connected to the address “driver circuit 46” of the PTA unit 321 in the end force of the back support substrate 32 at the bottom of the PTA unit 332. The driver control circuit 42 is connected to the X electrode driver circuit board 500 of the PTA unit 322 and the address' driver circuit 46 via a cable indicated by a one-dot chain line.

[0049] Scan pulse circuit 70 applies the scan voltage pulse Vy to two portions of length Ly of length 2Ly at the boundary between PTA units 331 and 332. The length of the Y electrode is equal to the width Ly of each of the PTA units 331 and 332. Therefore, in the discharge cell of the Y electrode portion in each of the PTA units 331 and 332 located farthest from the Y electrode portion on the boundary to which the scan voltage pulse of the scan pulse circuit 70 is applied, the scan voltage pulse Vy Since the effective width and height are sufficient, the possibility of successful address discharge is increased.

[0050] FIGS. 12A and 12B show scanning pulse circuits 70 and Z or X from the display electrode pair 2 on the inner surface of the front support substrate 31 at the boundary between two adjacent PTA units 331 and 332 in FIG. The method of drawing out the connection line 22 to the electrode driver circuit board 500 is shown. The Y electrode connection line 22 is formed on the flexible cable 70FC. The X electrode connection line 22 is formed on the flexible cable 500FC.

[0051] In FIG. 12A, each of the front support substrates 31 on the front support substrate 31 extends from the right side of the front support substrate 31 of the separate PTA unit 332 to the lower side of the rear support substrate 32 along the outer surface of the plasma tube 11B. A connection line 22 connected to the display electrode pair 2 is formed. Next, as shown in FIG. 12B, the left side of the PTA unit 331 is connected to the right side of the PTA unit 332 so that the corresponding display electrode pairs 22 of the PTA unit 321 and the PTA unit 332 are in contact with each other. Make it inconspicuous. The connection line 22 drawn from the Y electrode in the display electrode 2 is connected to the scan pulse circuit 70 disposed on the left side of the back surface of the PTA unit 331 via a flexible cable 70FC (FIG. 11). The connection line 22 drawn from the X electrode in the display electrode pair 2 is connected to the PTA unit via the flexible cable 500FC (Fig. 11). It is connected to an X electrode driver circuit board 500 arranged on the right side of the back surface of 332. As an alternative configuration, the X electrode 2 in the display electrode pair 2 has a flexible 'cable 500FC on the right side of the PTA unit 331 and the left side of the PTA unit 332 as shown in Figs. 9 and 10. You can connect to the corresponding X electrode driver circuit board 500 via.

[0052] FIG. 13 illustrates two X electrode driver circuit boards 500, two Ys on the back of four adjacent PT A units 331, 332, 326, and 327 of a display device 108, according to yet another embodiment of the invention. An example of electrical connection of the electrode driver circuit 700 and four address electrode driver circuits (AD) 46 is shown.

The display device 108 has display electrode pairs 2 (XI, Υ1) to (Χη, Υη) connected to each other at the boundaries of the PTA units 331, 332, 326, and 327ί.接続 Connections in units 331 and 332 are the same as in Fig. 9. The connection at ΡΤΑunit 327 is the same as in Fig.10. The electrical connection of Υ electrode driver circuit 700 for ΡΤΑ unit 326 is the same as that of ΡΤΑ unit 331 in Fig. 11. In this case, the power supply 40 and the driver control circuit 42 are not arranged on the back surface of the ΡΤΑ unit 326.

[0054] The scan pulse circuit 70 of the unit 331 applies its scan voltage pulse -Vy to two portions of the length Ly of the 4Ly Y electrode at the boundary between the cuts 331 and 332. Since each is applied, the length of the Y electrode from the boundary is equal to the lateral width Ly of each of the PTA units 331 and 332. The scanning pulse circuit 70 of the PTA unit 326 applies the scanning voltage pulse 1 Vy to two portions of the length Ly of the Y electrode having a length of 4 Ly at the boundary between the PTA units 326 and 327. The length of the Y electrode from the boundary is equal to the width Ly of each of the PTA units 326 and 327. Therefore, in the discharge cell of the Y electrode portion in each of the PTA units 33 1, 332, 326, and 327 located farthest from the γ electrode portion on the boundary to which the scan voltage pulse of the scan pulse circuit 70 is applied, the scan is performed. Since the effective width and height of the voltage pulse Vy are sufficient, the possibility of successful address discharge is increased.

[0055] FIG. 14 illustrates two X-electrode dryno cycles on the back of five adjacent PTA units 321, 322, 325, 326, and 327 of display device 110, according to yet another embodiment of the present invention. An example of the electrical connection of a road substrate 500, two Y electrode driver circuits 700, and five address electrode driver circuits (AD) 46 is shown.

[0056] Display device 110 [This is a display electrode pair 2 (XI, Υ1) to (Χη, Υη) connected to each other at the boundaries of units 321, 322, 325, 326, and 327ί. Have The connections in the dredge units 311 and 312 are the same as in FIG. The connections in units 326 and 327 are the same as in FIG. The connection at ΡΤΑunit 325 is the same as that of ΡΤΑunit 322 in Fig. 9.

[0057] The scan pulse circuit 70 of the unit 321 generates its scan voltage pulse—Vy at the boundary between the mute 321 and 322, with the lengths Ly and 1.5Ly of the 4Ly Y electrodes. Since each part is applied to each part, the length of each part of the Y electrode is equal to the width Ly of the PTA unit 331 and 1.5 Ly. The scan pulse circuit 70 of the PTA unit 326 applies its scan voltage pulse—Vy to the two parts of length Ly and 1.5Ly of the 4Ly Y electrode at the boundary between the PTA units 326 and 327, respectively. Therefore, the length of each part of the Y electrode from the boundary is equal to the lateral width Ly and 1.5Ly of the PTA unit 327. Therefore, the Y component on the boundary where the scan voltage pulse of the scan pulse circuit 70 is applied, and the Y in each of the PTA units 321, 322, 325, 326 and 327 at the farthest position In the discharge cell of the electrode portion, the effective width and height of the scanning voltage pulse Vy are sufficient, so the possibility of successful address discharge is increased.

[0058] FIG. 15 shows two X electrode driver circuit boards on the back of six adjacent PTA units 321, 322, 324, 325, 326 and 327 of the display device 112, according to yet another embodiment of the present invention. Examples of electrical connections for 500, three Y electrode driver circuits 700, and six address electrode driver circuits (AD) 46 are shown.

[0059] Display device 112 [This is a display electrode pair 2 (XI, Υ1) to (Χη,) connected to each other at the boundaries of PTA units 321, 322, 324, 325, 326, and 327ί. Υη). ΡΤΑ Units 321 and 322 are the same as in FIG. The connections in dredging units 325, 326 and 327 are the same as in FIG. The connection in ΡΤΑunit 324 is the same as that in ΡΤΑunit 326.

[0060] Scanning pulse circuit 70 of ΡΤΑ units 331, 324 and 326 Apply Vy to the boundary between the two adjacent PTA units 331 and 332, 324 and 325, and 326 and 327, and apply them to the two parts of the length Ly of the 4Ly Y electrode respectively. Therefore, the length of the Y electrode of the boundary force is equal to the lateral width Ly of each of the PTA modules 321, 322, 324, 325, 326 and 327. Therefore, the apportioning of the Y electrode in each of the PTA units 321, 32 2, 324, 325, 326 and 327 located farthest from the portion of the Y electrode on the boundary where the scan voltage pulse of the scan pulse circuit 70 is applied. In the discharge senor, the effective width and height of the scanning voltage pulse Vy are sufficient, so the possibility of successful address discharge increases.

[0061] FIG. 16 serves to illustrate the scan pulse waveforms for synchronizing the scan pulses of the two or more sets of scan pulse circuits 70 of FIGS.

[0062] In order to prevent an error in address discharge, synchronization between the scan pulses of the two scan pulse circuits 70 of the PTA units 331 and 326 of Fig. 13 controlled by the driver control circuit 42, and by the driver control circuit 42 14 PTA units 321 and 326 of Fig. 14 to be controlled Synchronized between scan pulses of 70, or 3 sets of PTA units 321, 324 and 326 of Fig. 15 controlled by driver control circuit 42 Therefore, it is necessary to prevent the synchronization deviation between the scan pulses of the scan pulse circuit 70.

One of two arbitrary sets of scan pulse circuits 70 in each of FIGS. 13 to 15 is a scan pulse circuit A, and the other is a scan pulse circuit B. The scan pulses of the scan pulse circuits A and B have a scan pulse 'on period Ta in the scan pulse period of the Y electrode Yj, and the periods Tb and Tb, (Tb = Tb '). In the scan pulse period Ta of the Y electrode Yj, the scan pulse of the scan pulse circuit A is in the scan pulse OFF state as shown in FIG. 16E for each Y electrode other than the Y electrode Yj.

It is assumed that the running panorace in FIG. 16B of the running panorace circuit B is delayed by a delay time D = Tt at the maximum from the running pulse of FIG. 16A in the running panorace circuit A. The Y electrode Yj selected by one set of scan pulse circuits A should be effectively turned on, the period Tb in FIG. 16C, and the Y electrodes Yj before and after that selected by another set of scan pulse circuits B — 1 or Yj + 1 should be effectively turned on Period Tb 'and force in Fig. 16D Due to the delay of one scan pulse In order not to overlap, it is necessary to provide a margin period Tt considering the pulse delay time D at the transition between the on state and the off state. Therefore, the scan pulse has a slope (ramp) that falls to the ground potential GND force potential Vy in the first margin period Tt, and a slope that rises to the potential-Vy force ground potential GND in the second margin period Tt. Have.

[0065] The embodiment described above is merely given as a typical example, and it is obvious for those skilled in the art to combine the constituent elements of each embodiment, and variations and variations thereof. Obviously, various modifications can be made to the embodiments without departing from the scope of the invention as set forth in the principles and claims.

Brief Description of Drawings

[0066] FIG. 1 illustrates a schematic partial structure of an array of plasma tubes or gas discharge tubes of a conventional color display device.

FIG. 2A shows a front-side support substrate on which a plurality of transparent display electrode pairs are formed. FIG. 2B shows a backside support substrate on which a plurality of signal electrodes or signal electrodes are formed.

[FIG. 3] FIG. 3 shows the structure of a cross section perpendicular to the longitudinal direction of the tube of the plasma tube array of the display device.

[FIG. 4] FIG. 4 shows the electrical connections of the X electrode driver circuit board, the Y electrode driver circuit, the address electrode driver circuit, and the driver control circuit on the back of the PTA unit of a normal display device.

[Fig. 5] Fig. 5 shows the sustain voltage pulse circuit and scan pulse circuit for the Y electrode in the normal Y electrode driver circuit connected to the PTA unit, and the sustain voltage pulse for the X electrode on the X electrode driver circuit board. Show the schematic configuration of the circuit!

FIG. 6 shows an example of a schematic drive sequence of output drive voltage waveforms of an X electrode driver circuit board, a Y electrode driver circuit, and an address' driver circuit in a normal display device.

[FIG. 7] FIG. 7 shows the electrical connection of the X electrode driver circuit board, the Y electrode driver circuit, and the two address electrode driver circuits on the back of two PTA units arranged adjacent to each other in a normal display device. [FIG. 8] FIG. 8 shows the waveform of the scanning voltage pulse Vy along the longitudinal direction of the scanning electrode Yj of the pair of display electrodes extending across two adjacent PTA units of the display device.

[FIG. 9] FIG. 9 is a diagram illustrating an X electrode driver circuit board on the right rear side of the PTA unit, a Y electrode driver circuit on the left rear side of the PTA unit, and a rear surface of the PTA unit in the display device according to the embodiment of the present invention. An example of the electrical connection of the lower two address electrode driver circuits is shown.

FIG. 10 shows two X electrode driver circuit boards on the right rear side of the PTA unit and the left rear side of the PTA unit, and the Y electrode on the rear left side of the PTA unit in the display device according to another embodiment of the present invention. An example of the electrical connection of the driver circuit and the two address electrode driver circuits on the lower back side of the PTA unit is shown.

[FIG. 11] FIG. 11 is a diagram showing an X electrode driver circuit board on the right rear side of the PTA unit, a Y electrode driver circuit on the left rear side of the PTA unit, and a display device according to still another embodiment of the present invention. An example of the electrical connection of the two address electrode driver circuits on the lower back side of the PTA unit is shown.

[FIG. 12] FIGS. 12A and 12B show the connection lines from the display electrode pair on the inner surface of the front support substrate to the scan pulse circuit and the Z or X electrode driver circuit substrate at the boundary between two adjacent PTA units in FIG. Show me how to pull out.

FIG. 13 shows four adjacent PTs of a display device according to yet another embodiment of the present invention.

Two X electrode driver circuit boards on the back of the A unit, two Y electrode driver circuits

, And an example of the electrical connection of four address electrode driver circuits.

[FIG. 14] FIG. 14 shows five adjacent PTs of a display device according to still another embodiment of the present invention.

, And an example of the electrical connection of the five address electrode driver circuits.

[Fig. 15] Fig. 15 is a diagram showing six adjacent PTs of a display device according to still another embodiment of the present invention.

Two X electrode driver circuit boards and three Y electrode driver circuits on the back of the A unit

, And an example of the electrical connection of the six address electrode driver circuits.

[Fig. 16] Fig. 16 shows the same scan pulse of two or more sets of scan pulse circuits of Figs. 13, 14 and 15. This is useful for explaining the scanning pulse waveform for taking a period.

Claims

The scope of the claims

[1] Inside, a phosphor layer is formed and a discharge gas is enclosed, and a plurality of gas discharge tubes each having a plurality of light emitting points in the longitudinal direction are juxtaposed, and a display surface of the plurality of gas discharge tubes A display device comprising a plurality of units, each having a plurality of pairs of display electrodes disposed on a side, and a plurality of signal electrodes disposed on a back side of the plurality of gas discharge tubes;

The plurality of pairs of display electrodes of the plurality of units are electrically connected to have a length corresponding to the plurality of units,

A scan voltage pulse is applied to one display electrode of each of the plurality of display electrode pairs of the plurality of units in the first period, and a sustain voltage is applied to the one display electrode in the second period. At least one scanning drive circuit for applying a pulse; and applying a potential for a sustain voltage pulse to the other display electrode of each of the plurality of display electrode pairs of the plurality of units in the second period At least one sustain voltage circuit to

With

The one scanning drive circuit is configured to apply a scanning voltage pulse to the one display electrode of each of the plurality of pairs of display electrodes at a boundary between two adjacent units of the plurality of units. And a sustain voltage pulse is applied to the one display electrode.

[2] The display device according to claim 1, wherein the one sustain voltage circuit applies a sustain voltage pulse to the other display electrode on one outer side of the plurality of units.

[3] The display device according to [1], wherein the one sustain voltage circuit applies a sustain voltage pulse to the other display electrode at a boundary between the two units.

[4] One outer unit among the plurality of units has the one scanning drive circuit, the one sustain voltage circuit, the one scan drive circuit, and the one sustain voltage circuit on the rear surface thereof. 4. The display device according to claim 1, further comprising a control circuit that controls the display device. Another one of the plurality of scan driving circuits is arranged so that each display electrode pair of the plurality of pairs of display electrodes is arranged at a boundary between the other two adjacent units in the plurality of units. Applying a scan voltage pulse to one of the display electrodes, applying a sustain voltage pulse to the one display electrode,

Each of the scan voltage pulses of the one scan drive circuit and the other one scan drive circuit has a period between adjacent scan voltage pulses to prevent a synchronization shift with the other scan voltage pulse. The display device according to claim 1, wherein