JP2010062047A - Lighting inspection method and inspection display of plasma display panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To shorten required time of lighting inspection concerning a lighting inspection method and inspection display for a plasma display panel. <P>SOLUTION: In order to determine the quality of a lighting state of the plasma display panel for color display use, frames consisting of a first sub-frame making all cells in a screen to be lit and a second sub-flame making all cells in the screen not to be lit are repeatedly displayed. To display the first sub-frame, a reset operation for lowering wall voltage of each cell in the screen, a whole-face lighting addressing operation of impressing scan pulses on one cell after another in line inside the screen with a plurality of address electrodes while being biased to a selected potential in bulk, and a sustaining operation of impressing a sustaining pulse on cells in the screen all at once are carried out. To display the second sub-frame, a reset operation, a whole-face non-lighting addressing operation of impressing scan pulses on one cell after another in line inside the screen with the plurality of address electrodes while being maintained at a non-selected potential in bulk, and a sustaining operation are carried out. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a lighting inspection method and an inspection display device for an AC plasma display panel capable of color display.

  The plasma display panel has a gas-filled space sandwiched between a front substrate and a rear substrate and partitioned by partition walls, and selectively emits three colors of UV-excited phosphors of red, green, and blue by gas discharge. Perform color display. The display discharge for causing the phosphor to emit light is a so-called surface discharge type discharge (hereinafter referred to as a surface discharge). The surface discharge occurs between the electrodes of the first and second display electrodes extending in parallel along the horizontal direction of the screen, which is a matrix display area. The display electrodes are generally arranged on the front substrate, and a display line corresponding to each row is defined in the screen in a stripe arrangement. Address electrodes are arranged on the screen so as to intersect the display lines, and cells serving as display elements correspond to the intersections between the display lines and the address electrodes.

  A typical screen color arrangement is a so-called stripe arrangement in which red, green and blue are arranged in the horizontal direction. In the stripe arrangement screen, the color of cells belonging to the vertical cell column corresponding to each column of the matrix display is the same, and the color development is different between adjacent vertical cell columns. Each vertical cell column corresponds to one address electrode. That is, each address electrode corresponds to any one of the three colors red, green, and blue.

  In a factory that manufactures a plasma display panel, a lighting inspection is performed on the completed plasma display panel. In the conventional inspection, the entire white display for lighting all the cells is performed, and after that or before that, the single color display for lighting all the cells of one color is sequentially performed for the three colors. An inspection person observes these displays to determine whether the plasma display panel is good or bad. During the entire white display, the presence or absence of dark cells (dark spots) and conspicuously bright cells (bright spots) are mainly examined. Then, during monochrome display, the presence or absence of disconnection of the address electrode corresponding to the display color is checked.

Japanese Patent Application Laid-Open No. 2004-133867 proposes automating inspection using a CCD camera for lighting inspection using white display. Further, in this document, when aging a plasma display panel, one of four long external electrodes (electrode bars) is arranged on each of four terminal groups arranged along the four sides of the rectangular plasma display panel. It is described that a voltage is applied to the electrodes of the plasma display panel through the four electrode bars and the terminal group in a state where they are in contact with each other.
JP 2006-100122 A

  In order to perform monochromatic display, a large number of address electrodes whose total number is three times the horizontal resolution of the screen must be individually controlled for each color of the corresponding cell. Unlike the white display, a large number of address electrodes cannot be connected together and connected to the drive circuit at once. For this reason, in the lighting inspection, the address electrode and the drive circuit are connected using a wiring board having a terminal group corresponding to the terminal group of the address electrode. In general, since the terminal arrangement interval is as small as 200 μm or less, it is difficult to position the wiring board with respect to the plasma display panel. In the future, as the screen becomes higher in definition, positioning becomes more difficult and the time required for positioning work becomes longer.

  Further, in order to check the presence / absence of disconnection of the address electrode, it takes a corresponding time to display a single color three times for each of the three colors.

  The present invention has been made in view of such circumstances, and aims to shorten the time required for lighting inspection.

  The method for achieving the above object includes a plurality of display electrodes covered with a dielectric and a plurality of address electrodes intersecting with the display electrodes, and each of the plurality of address electrodes has a different color forming a screen. A method of inspecting lighting of a plasma display panel to which one type of cells corresponds, and in order to determine whether the lighting state of the screen is good or not, all cells in the screen are cells to be lit 2 A frame composed of a first sub-frame that is a value image and a second sub-frame that is a binary image that is a cell that should not be lit on all the cells in the screen is repeatedly displayed. In order to display a frame, a reset operation for lowering the wall voltage of each cell in the screen, the plurality of address electrodes are collectively biased to a selected potential in the screen In order to display the second subframe by performing a full-lighting addressing operation in which scan pulses are sequentially applied to cells in a line, and a sustain operation in which a sustain pulse is simultaneously applied to cells in the screen, and the second subframe is displayed, The entire non-lighting addressing operation and the sustain operation are performed in which scan pulses are sequentially applied to cells in the screen in a state where the plurality of address electrodes are collectively maintained at a non-selection potential. Means for determining whether or not the lighting state is good is arbitrary. The operator can make a determination based on the result of visual observation, and the determination can be automated using an image recognition technique.

  In the lighting inspection by this method, lighting control for all cells in the screen is intermittently performed, and non-lighting control is performed between the lighting control and the next lighting control. The lighting control here means a series of drive control including an addressing operation and a sustaining operation for lighting a cell when it is normal. The non-lighting control means a series of drive control including an addressing operation and a sustaining operation that does not light a cell even if it is normal. If all the cells are normal, all the cells are lit whenever the lighting control is performed. When the screen is observed, the screen is darker than when the lighting control is continuous. If the display color when the lighting control is continuous is white, the display color in the lighting inspection is dark white (gray), that is, a neutral gray color. However, the brightness of the screen depends on the number of lightings per unit time.

  If the brightness and display color are uniform over the entire screen, the lighting state is good and the plasma display panel can be made good. On the other hand, if there is a remarkable dark spot or bright spot, the lighting state is poor. The lighting state is also poor when there are horizontal or vertical dark lines that appear due to electrode breakage.

  The disconnection of the address electrode appears as a display color disorder. If there is no disconnection of the address electrode, the display color of the set of three adjacent columns is achromatic as described above. However, if the address electrode corresponding to, for example, the red column in the set is disconnected, the red cell is not lit, so the display color of the set is a complementary color (cyan) of red. This display color is a chromatic color. When two columns in the set are not lit, the display color of the set is the color of the remaining one column. This is also a chromatic color. Disturbances in the display color in which a chromatic line appears on the achromatic background are conspicuous visually and are easy to find. By discriminating what color the chromatic color is, it is possible to know which color of the address electrode corresponding to the disconnection is broken.

  According to the present invention, since it is possible to confirm the presence or absence of disconnection of the address electrode without sequentially performing three types of single color display with different colors, it is possible to shorten the time required for the lighting inspection by omitting the single color display. it can.

  Further, since a plurality of address electrodes may be electrically shared and connected to the drive circuit, the connection work is facilitated.

  In a factory that manufactures a plasma display panel, an operator performs a visual lighting inspection using the inspection display device 1 shown in FIG. The inspection display device 1 displays a frame to be described later in response to a predetermined switch operation or a signal input from an external device. The operator observes the screen displaying the frame and determines whether there is a defect such as a cell defect or electrode disconnection.

  The AC type plasma display panel 2 to be inspected has a screen 50 capable of color display. In the screen 50, the first display electrode X and the second display electrode Y that are alternately arranged extend in the horizontal direction, and the address electrode A extends in the vertical direction. The display electrode X and the display electrode Y define a display line in the screen 50, and constitute an electrode pair for generating a display discharge in a surface discharge type in each display line. A cell is defined at each intersection between the display electrode pair and the address electrode A. Each address electrode A corresponds to one type of the three types of cells having different colors. When the specification of the screen 50 is, for example, the full high-vision specification, the number of display lines is 1080, which is the same as the vertical resolution, and the total number of address electrodes A is 5760, which is three times the horizontal resolution.

  The inspection display device 1 controls an X driver 61 that applies a voltage pulse to the display electrode X, a Y driver 62 that applies a voltage pulse to the display electrode Y, an A driver 63 that biases the address electrode A, and pulse application by the driver. A controller 65, a power supply circuit 66 for supplying electric power for discharge, and contact members 67, 68, 69 for electrical connection with the plasma display panel 2 are provided. The Y driver 62 includes a scanning circuit 621 that applies a scan pulse and a sustain circuit 622 that applies a sustain pulse. The controller 65 includes a control unit 651 for displaying a first subframe, which will be described later, and a control unit 652 for displaying a second subframe. The control units 651 and 652 control the X driver 61, the Y driver 62, and the A driver 63 so as to apply a predetermined driving voltage to the plasma display panel 2 with reference to a memory that stores waveform data in advance.

  The X driver 61 drives the plurality of display electrodes X all at once via the contact member 67. The contact member 67 is a uniform conductor and has a length corresponding to the terminal row of the display electrodes X disposed along one edge in the horizontal direction of the plasma display panel 2. By overlapping the contact member 67 on the terminal row, a large number of display electrodes X are electrically shared.

  The Y driver 62 individually drives the plurality of display electrodes Y via the contact member 68. The contact member 68 is a wiring board having a conductor pattern corresponding to each display electrode Y, and is overlapped with a terminal row of the display electrodes Y arranged along the other edge in the horizontal direction of the plasma display panel 2. . Each display electrode Y is individually connected to a Y driver 62.

  The A driver 63 drives a large number of address electrodes A at once through the contact member 69. The contact member 69 is a uniform conductor and has a length corresponding to the terminal row of the address electrode A disposed along one edge in the vertical direction of the plasma display panel 2. By overlapping the contact member 69 on the terminal row, all the address electrodes A are electrically shared.

  In preparation for lighting inspection, contact members 67, 68, and 69 are stacked at predetermined positions on the periphery of the plasma display panel 2 carried into the inspection display device 1, and are fixed to the plasma display panel 2 with clips (not shown), for example. . At this time, the contact member 67 and the contact member 69 may be in contact with the terminal group to be shared, and high-precision positioning is not necessary. In particular, since the arrangement pitch of the terminals of the address electrodes A is smaller than the arrangement pitch of the terminals of the display electrodes X and Y, the fact that the terminal groups of the address electrodes A may be electrically bundled together with the display device 1 for inspection. This contributes to speeding up the connection with the plasma display panel 2.

  In the lighting inspection, the inspection display device 1 to which the plasma display panel 2 is connected repeatedly displays the frame F shown in FIG. 2 at a frame rate of 1/60, for example. The frame F includes a first subframe SF1 that is a binary image in which all the cells in the screen are to be lit and a second subframe SF2 that is a binary image in which all the cells are not to be lit. Composed. The number of first subframes SF1 and the number of second subframes SF2 are equal, and the number of subframes of frame F is an even number.

  For example, the frame F is composed of a total of 10 subframes including 5 first subframes SF1 and 5 second subframes SF2. A frame period Tf of about 16.7 ms is equally divided into ten, and a time of about 1.67 ms is allocated to each first subframe SF1 and each second subframe SF2. The first subframe SF1 and the second subframe SF2 are alternately displayed one by one. Thereby, if there is no defect in the screen 50, the screen 50 appears as a uniform achromatic surface having a brightness between white and black in the overall visual observation.

  The time allocated to the first subframe SF1 is divided into the reset period TR, the first address period TA1, and the sustain period TS, and the time allocated to the second subframe SF2 is the reset period TR, the second address period TA2, and the sustain period. Classified into TS. The lengths of the three divided periods are equal between the first subframe SF1 and the second subframe SF2, and the drive waveforms of the reset period TR and the sustain period TS are common as shown in FIG. is there.

  In the reset period TR, a reset operation (wall charge initialization) for reducing the wall voltage of each cell in the screen 50 is performed. In the illustration of FIG. 3, so-called blunt wave reset is performed in the reset period TR. In the blunt wave reset, a weak discharge is continuously generated between the electrodes of the display electrode pair that defines each display line by the application of a blunt wave pulse typified by a ramp waveform pulse, and thereby in the dielectric covering the display electrode pair. This is an operation for adjusting the wall charge amount. The wall charge amount at the end of the blunt wave reset in this embodiment is smaller than the amount necessary for display discharge.

  In both the first address period TA1 and the second address period TA2, for example, one negative electrode scan pulse in order from the first to the last nth of the array for the same number of display electrodes Y as the number of display lines. Py is applied, thereby selecting the display lines in order. However, the control of the potential of the address electrode A performed in synchronization with the selection of the display line differs between the first address period TA1 and the second address period TA2.

  In the first address period TA1 related to the first subframe SF1, the plurality of address electrodes A that are electrically connected together by the contact member 69 are applied from the first scan pulse Py to the last scan pulse Py. The bias voltage is biased to the positive polarity selection potential Va over the period until. This operation has the same effect as applying an address pulse to all cells in the screen 50 in line order. In the cell to which the scan pulse Py is applied, an address discharge is generated between the display electrode Y and the address electrode A. This address discharge triggers a discharge between the display electrode Y and the appropriately biased display electrode X, and a wall charge necessary for sustain is formed on the dielectric covering the display electrode pair. That is, in the first address period TA1, the full lighting addressing operation of the writing type is performed in which the wall charges are controlled so that all the cells are lit in the next sustain period TS.

  On the other hand, in the second address period TA2 related to the second subframe SF2, the plurality of address electrodes A electrically connected together by the contact member 69 are changed from the start of the application of the first scan pulse Py to the last scan pulse Py. It is kept at a non-selection potential (in the example, a ground potential) over a period until the end of application. Thereby, even when the scan pulse Py is applied, the cell voltage between the display electrode Y and the address electrode A does not exceed the discharge start voltage. Since the address discharge does not occur, wall charges necessary for the sustain are not formed on the dielectric covering the display electrode pair, and the wall charge amount is almost the same as that at the end of the reset operation. That is, in the second address period TA2, a full non-lighting addressing operation is performed to control wall charges so that all cells are not lighted in the next sustain period TS.

  In the sustain period TS, the sustain pulse Ps is alternately applied to the display electrode Y and the display electrode X. The amplitude of the sustain pulse Ps is a sustain voltage (Vs) slightly lower than the surface discharge start voltage. In the sustain period TS of the first subframe SF1, if a cell in the screen 50 is normal, a discharge between display electrodes occurs every time the sustain pulse Py is applied, and the cell is turned on. A lighted cell exhibits a display color determined by the phosphor it has. On the other hand, in the sustain period TS of the second subframe SF2, it is not lit if the cell in the screen 50 is normal, and is not normally lit even if it is not normal. However, excessive lighting may occur for some reason.

  Thus, the drive sequence including the line sequential addressing operation is similar to the drive sequence when the plasma display panel 2 is used for displaying an arbitrary image, and is useful for confirming the lighting state in actual use. At the same time, there is an advantage that the driving device for actual use can be diverted to the lighting inspection. In the display of the frame F, all the cells are driven so as to be lit up or not lit up at the same time. Therefore, it is theoretically possible to apply the scan pulse Py to all the display lines all at once instead of selecting the sequential display lines. Is possible. However, this requires a driver for an address electrode that supplies an address discharge current to all cells simultaneously. According to the present embodiment, the lighting inspection can be performed without using a special driver.

  The time required for the addressing operation depends on the scan pulse width and the number of display lines. For example, when the scan pulse width is 1 μs and the number of display lines is 1080, the addressing time per subframe is 1.08 ms. When the frame F has a 10-subframe organization, the allocation time for one subframe is about 1.67 ms, so that, for example, 0.27 ms and 0.32 ms can be sequentially assigned to the reset operation and the sustain operation. If a pulse width in which a pair of sustain pulses for applying an alternating polarity voltage between display electrodes is regarded as one pulse is 10 μs, 64 sustain discharges can be generated in a sustain period TS of 0.32 ms.

  An operator in charge of lighting inspection of the plasma display panel 2 observes the screen 50 in a state where the inspection display device 1 repeatedly displays the frame F over a period of, for example, several minutes, and detects cell defects and electrodes. Check for defects such as wire breakage. If the brightness and display color are uniform throughout the screen 50, the lighting state is good, and if there is a noticeable dark spot or bright point, the lighting state is bad. Most of the dark spots are caused by defective patterning of the display electrodes. The main cause of the bright spot is a lack of partition walls that partition the gas discharge space. Standards for determining whether the plasma display panel 2 is good or bad are set in advance, and the operator determines the quality of the plasma display panel 2 based on the observation results.

  The disconnection of the address electrode appears as a display color disorder and is easy to find. If there is no disconnection of the address electrode, the red, green and blue cells are lit, so that the display color is a halftone achromatic color as described above. However, for example, if the address electrode A corresponding to a blue cell is disconnected, the display color near the disconnected address electrode A is a blue complementary color (mixed color of red and green). When the address electrode A corresponding to the green cell is disconnected, the display color near the disconnected address electrode A is a complementary color of green (mixed color of red and blue). If adjacent address electrodes A are both disconnected, the display color near the disconnected address electrode A is one of the three colors. In any case, the display color is locally chromatic on the screen 50. When three address electrodes A including one address electrode A and the adjacent electrodes are disconnected, a portion corresponding to these address electrodes A in the screen 50 appears as a dark line.

  FIG. 4 shows an example of the cell structure of the plasma display panel 2. The plasma display panel 2 includes a front plate 10, a back plate 20, and a discharge gas (not shown). In the figure, the front plate 10 and the back plate 20 are shown separated to facilitate understanding of the internal structure.

  The front plate 10 includes a glass substrate 11, a first display electrode X, a second display electrode Y, a dielectric layer 17, and a protective film 18 that prevents sputtering of the dielectric layer 17. Each of the display electrodes X and Y is composed of a transparent conductor and a metal band as a power supply bus. The dielectric layer 17 and the protective film 18 extend over the entire screen and cover the display electrodes X and Y.

  The back plate 20 includes a glass substrate 21, an address electrode A, a dielectric layer 22, a grid-like partition wall 23, a red (R) phosphor 26, a green (G) phosphor 27, and a blue (B) phosphor. 28. The partition wall 23 includes a plurality of vertical walls 24 parallel to the address electrodes A and a plurality of horizontal walls 25 parallel to the display electrodes X and display electrodes Y.

  The color arrangement of the screen determined by the arrangement of the phosphors is a stripe arrangement in which three colors are repeatedly arranged in the order of R, B, and G in the horizontal direction. In the vertical cell column corresponding to each column of the matrix display, the color development of the cells is the same, and the color development is different between the adjacent vertical cell columns. Each address electrode A corresponds to any one of three colors of red, green and blue.

  Note that the arrangement of the display electrodes X and Y may be either of two widely known forms. One is to arrange display electrodes one by one on the display line as shown in the figure so that the electrode gap between adjacent display lines is wider than the electrode gap (surface discharge gap) in each display line. In the other one, display electrodes are arranged at equal intervals, and all display electrode gaps are used as surface discharge gaps. The partition pattern is not limited to the illustrated lattice pattern, and may be a stripe pattern.

  According to the above embodiment, since the halftone is displayed by alternately displaying the first sub-frame SF1 that is the full lighting image and the second sub-frame SF2 that is the full non-lighting image, the driving frequency is lowered. In comparison with the case where only the full lighting image is displayed, the phenomenon that the cell that should not be lighted is lighted by induction from the lighted cell (excessive lighting) is less likely to occur, and it is easy to find the disconnection of the electrode.

  In the above-described embodiment, the subframe organization of the frame F may be any as long as the number of subframes is two or more and includes the first subframe SF1 and the second subframe SF2. The number of first subframes SF1 and the number of second subframes SF2 are preferably the same, but they may be different. It is not always necessary to alternately display the first subframe SF1 and the second subframe SF2 one by one, and the second subframe SF2 may be displayed after two or more first subframes SF1 are displayed in succession or vice versa. A display order in which the first subframe SF1 is displayed after the two or more second subframes SF2 are continuously displayed can be employed. Further, it is not necessary to allocate the same length of time to the first subframe SF1 and the second subframe SF2. The length of the sustain period TS may be different between the first subframe SF1 and the second subframe SF2.

  Although an example in which the worker determines whether the lighting state is good or bad is given, the inspection can be automated using an image recognition technique. The setting of the plasma display panel 2 to the inspection position and the electrical connection between the inspection display device 1 and the plasma display panel 2 performed using the contact members 67 to 69 may be automated, or may be performed by an operator. .

  The illustrated driving waveform is an example, and the amplitude, polarity, and timing can be changed variously. For example, in the sustain period TS, the sustain voltage may be applied between the display electrodes by simultaneously applying pulses having different polarities to the display electrode X and the display electrode Y. In order to increase the discharge probability of the sustain discharge, the initial pulse amplitude and pulse width of the sustain period may be increased. It is possible to adopt a double scan method in which the address electrode A is divided into two and two display lines are selected simultaneously.

It is a figure which shows the outline of a structure of the display apparatus for a test | inspection which concerns on embodiment of this invention. It is a figure which shows the structure of the flame | frame which a display apparatus for a test | inspection displays. It is a figure which shows an example of a drive waveform. It is a figure which shows an example of the cell structure of a plasma display panel.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Display apparatus for inspection 2 Plasma display panel 17 Dielectric layer (dielectric)
X, Y display electrode A address electrode 50 screen SF1 first subframe SF2 second subframe F frame TR reset period TA1 first address period TA2 second address period TS sustain period Va selection potential Py scan pulse Ps sustain pulse 69 contact member (conductor)
61 X driver 62 Y driver 63 A driver 65 Controller 651, 652 Control unit

Claims (6)

A plurality of display electrodes covered with a dielectric and a plurality of address electrodes intersecting with the display electrodes, each of the plurality of address electrodes being one of three types of cells having different colors forming a screen It is a lighting inspection method of a plasma display panel corresponding to a cell,
In order to determine whether the lighting state of the screen is good or bad, the first subframe which is a binary image in which all the cells in the screen are to be lit, and all the cells in the screen are not to be lit A reset operation for reducing a wall voltage of each cell in the screen in order to repeatedly display a frame composed of a second sub-frame which is a binary image and display the first sub-frame at that time A full lighting addressing operation in which scan pulses are sequentially applied to cells in the screen in a state where the plurality of address electrodes are collectively biased to a selection potential, and a sustain pulse is simultaneously applied to the cells in the screen In order to perform a sustain operation and display the second subframe, the reset operation and the plurality of address electrodes are collectively maintained at a non-selection potential. Entirely unlit addressing operation for applying the cell to the line sequential scanning pulses of the screen in the state, and the lighting inspection method of a plasma display panel and performs a sustain operation. The lighting inspection method for the plasma display panel according to claim 1, wherein the first subframe and the second subframe are alternately displayed. A period of the same length is allocated to the first subframe and the second subframe, and a drive waveform for controlling the display electrode is made common to the first subframe and the second subframe. 3. A lighting inspection method for a plasma display panel according to 2. 4. The lighting inspection method for a plasma display panel according to claim 1, wherein the plurality of address electrodes are electrically shared by connecting their end portions with a conductor. 5. A plurality of display electrodes covered with a dielectric and a plurality of address electrodes intersecting with the display electrodes, each of the plurality of address electrodes being one of three types of cells having different colors forming a screen It is a lighting inspection method of a plasma display panel corresponding to a cell,
In order to determine whether the lighting state of the screen is good or not, a full lighting addressing operation in which scan pulses are sequentially applied to cells in the screen in a state where the plurality of address electrodes are collectively biased to a selection potential; The entire non-lighting addressing operation in which a scan pulse is sequentially applied to the cells in the screen in a state where a plurality of address electrodes are collectively kept at a non-selection potential is repeatedly performed. Performing a sustain operation for simultaneously applying a sustain pulse to the cells in the screen using the plurality of display electrodes and a reset operation for reducing the wall voltage of each cell in the screen. Display panel lighting test method. A plurality of display electrodes covered with a dielectric and a plurality of address electrodes intersecting with the display electrodes, each of the plurality of address electrodes being one of three types of cells having different colors forming a screen An inspection display device used for lighting inspection of a plasma display panel corresponding to a cell,
A plurality of drivers for applying a driving voltage to the plasma display panel;
A first subframe that is a binary image in which all cells in the screen are to be lit; and a second subframe that is a binary image in which all cells in the screen are not to be lit. A controller for controlling the plurality of drivers so as to repeatedly display the frame
The controller is
Reset operation for lowering the wall voltage of each cell in the screen, full lighting addressing in which scan pulses are sequentially applied to cells in the screen in a state where the plurality of address electrodes are collectively biased to a selection potential A control unit for displaying the first sub-frame, causing the plurality of drivers to perform an operation and a sustain operation for simultaneously applying a sustain pulse to the cells in the screen;
In order to display the second subframe, the non-lighting addressing is performed so that scan pulses are sequentially applied to the cells in the screen while the reset operation and the plurality of address electrodes are collectively maintained at a non-selection potential. An inspection display device, comprising: a control unit for displaying the second sub-frame that causes the plurality of drivers to perform an operation and the sustain operation.

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