JP3863079B2 - Display panel display inspection method and display inspection apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a display inspection method for inspecting disconnection of electrodes of a display panel in which display cells are arranged in a matrix.
[0002]
[Prior art]
As a method for inspecting the disconnection of the electrodes of the plasma display in which the display cells are arranged in a matrix form, conventionally, a method has been employed in which a full-surface display pattern is used, the display pattern is captured as image data, and defects are detected by image analysis. As shown in FIG. 1A, when a break occurs in the electrode of the plasma display panel 30, a non-light emitting portion is generated in the display line. Therefore, a line defect can be easily extracted by comparing gradations between a display line having a broken line and pixels on the left and right sides of the display line.
[0003]
[Problems to be solved by the invention]
However, as shown in FIG. 1B, when the display line having a disconnection is at the left end or the right end of the display area, the gradation at the line defect due to the disconnection and the gradation outside the display area Are substantially equal, it is difficult to detect disconnection by the above method. On the other hand, if an attempt is made to compare gradations with one neighboring pixel on the side in the display area, it is necessary to strictly ensure the verticality of the display cell column, and distortion of the display area is not allowed. For this reason, it is difficult to adopt this method.
[0004]
It is an object of the present invention to provide a display inspection method and a display inspection apparatus for a display panel that can reliably detect a line defect at the left end or right end in a display area.
[0005]
[Means for Solving the Problems]
The display panel inspection method according to claim 1, comprising: a plurality of row electrodes; and a plurality of column electrodes arranged in a direction orthogonal to the plurality of row electrodes and forming display cells at intersections of the row electrodes. A display panel display inspection method for inspecting a line defect of a display panel that displays an image by controlling light emission of the display cells arranged in a matrix in a display area, and is adjacent to the outside of the display area to emit at least one of the right end display cell column including at least a rightmost display cell column adjacent to the left end view outside the cell columns or the display area including at least a display cell row leftmost as inspected, the inspection the display cell columns except display cell column for by the non-light emission, and each display cell of the display cell row of said object, the inspection pair near the display cell And Viewing cell and the display area outside the portion of the outer detected by the image sensor, based on the output video signal, detecting the number and length of the column direction of the bright line corresponding to the display cell columns of said object When the number and length of the bright lines are less than a predetermined value, it is determined that a disconnection has occurred in the column electrode corresponding to the display cell column.
[0006]
The display panel inspection method according to claim 3 , comprising: a plurality of row electrodes; and a plurality of column electrodes arranged in a direction orthogonal to the plurality of row electrodes to form display cells at intersections of the row electrodes. The display cells of three colors having different emission colors arranged in the row direction constitute one pixel, and the display cells of the same emission color are arranged in the column direction, and arranged in a matrix in the display area an inspection method of a display panel to inspect the line defect of the display panel for displaying an image by controlling light emission of the display cell, at least one pixel column of the leftmost portion or rightmost portion adjacent to the outside of the display area either cause one to be emitted as the inspection target, the pixel rows except the pixel column of the test object by the non-light emission, and each display cell of the pixel rows of said object, in the vicinity of the display cell Detecting a Viewing cell and the display area outside the portion of the outer査object by the image sensor, based on the output video signal, the number and length of the column direction of the bright lines corresponding to said inspected image Motoretsu detecting the number and length of the bright line is of less than the predetermined value, and judging as to break the column electrode corresponding to the picture Motoretsu occurs.
[0007]
The display inspection apparatus for a display panel according to claim 5 , wherein a plurality of row electrodes and a plurality of column electrodes arranged in a direction orthogonal to the plurality of row electrodes and forming display cells at intersections of the row electrodes, A display panel display inspection apparatus for inspecting a line defect of a display panel that displays an image by controlling light emission of the display cells arranged in a matrix in the display area, and is adjacent to the outside of the display area light is emitted as the test object at least one of a right end display cell column including at least a display cell row rightmost adjacent the left end portion outside the display cell row or display area including at least a display cell row of the leftmost of the a light emission control means for the display cell columns except the display cell row inspected Ru is no light, and the display cells of the display cell row of said object, the table An image sensor for detecting the Viewing cell and the display area outside the portion to be inspected outside the cell neighborhood, on the basis of the video signal output from the image sensor, the column direction corresponding to the display cell columns of said object Determining means for detecting the number and length of bright lines, and determining that a break has occurred in a column electrode corresponding to the display cell column when the number and length of the bright lines are less than a predetermined value; It is characterized by that.
[0008]
The display inspection apparatus for a display panel according to claim 7 , wherein a plurality of row electrodes and a plurality of column electrodes arranged in a direction orthogonal to the plurality of row electrodes to form display cells at intersections of the row electrodes, The display cells of three colors different in emission color from each other arranged in the row direction constitute one pixel, and the display cells of the same emission color are arranged side by side in the column direction and arranged in a matrix in the display area wherein a test device of the display panel to inspect the line defect of the display panel for displaying an image by controlling the light emission of the display cell, among the pixel columns of the leftmost portion or rightmost portion adjacent to the outside of the display area was light is emitted as the test subject at least one, and light emission control means for the pixel columns except the pixel rows of said object Ru is no light, and the display cell of the pixel rows of said object, An image sensor for detecting the Viewing cell and the display area outside the portion of the test subject to near the display cell, based on the video signal output from the image sensor, the column corresponding to the inspected image Motoretsu Determining means for detecting the number and length of bright lines in the direction, and determining that a disconnection has occurred in a column electrode corresponding to the display pixel column when the number and length of the bright lines are less than a predetermined value; It is characterized by providing.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
A display panel display inspection method according to an embodiment of the present invention will be described below with reference to FIGS.
[0010]
FIG. 2 is a block diagram showing the configuration of an inspection apparatus used in the display inspection method for the plasma display panel, and FIG. 3 is a diagram showing the electrode arrangement of the plasma display panel 30 to be inspected.
[0011]
As shown in FIG. 2, the inspection apparatus 100 includes an inspection machine body 1 that turns on the plasma display panel 30 during inspection, a CCD camera 2 that captures a display surface of the plasma display panel 30, and a video signal from the CCD camera 2. An image processing apparatus 3 for receiving the image data, and an inspection machine main body 1, a CCD camera 2 and a control device 4 for controlling the image processing apparatus 3. The image processing apparatus 3 includes an image processing unit 3a that executes image processing for analyzing a light emission pattern, which will be described later, an image processing memory 3b that stores image data from the CCD camera 2 for each RGB, and data to be subjected to image processing. Is temporarily stored in the image processing target memory 3c.
[0012]
As shown in FIG. 3, the inspection machine main body 1 is provided with an address driver 11, an X sustain driver 12 and a Y sustain driver 13 which are connected to the electrodes of the plasma display panel 30.
[0013]
As shown in FIG. 3, the plasma display panel 30 includes column electrodes D1r, D1g, D1b, D2r, D2g, D2b... Dmr, Dmg, Dmb, and a row electrode X1 provided in a direction orthogonal to these column electrodes. To Xn and row electrodes Y1 to Yn. As shown in FIG. 3, each column electrode is sequentially assigned to repeatedly correspond to the R cell, G cell, and B cell, and in the display area 30a, the intersections with the row electrodes X1 to Xn and the row electrodes Y1 to Yn. An R cell, a G cell, and a B cell are formed for each. As shown in FIG. 3, one pixel is formed with a set of R cells, G cells, and B cells arranged successively. A region 30b outside the display area is provided outside the display area 30a.
[0014]
As shown in FIG. 3, the row electrodes X1 to Xn and the row electrodes Y1 to Yn are alternately arranged in a comb shape so as to extend from opposite sides. In addition, one row electrode X1 to Xn and one row electrode Y1 to Yn are assigned to one display cell row, and the row electrode X1 to Xn and the row electrode Y1 to Yn face each other in parallel in one cell. Arranged.
[0015]
As shown in FIG. 3, the column electrodes D1r, D1g, D1b, D2r... Dmb are for the address driver 11, the row electrodes X1 to Xn are for the X sustain driver 12, and the row electrodes Y1 to Yn are for the Y sustain driver 13. , Each connected.
[0016]
Next, a method for driving the plasma display panel 30 will be described.
[0017]
One field as a period for driving the plasma display panel 30 includes a plurality of subfields SF1 to SFN. As shown in FIG. 4, each subfield is provided with an address period for selecting a cell to be lit and a sustain period for continuously lighting the cell selected in the address period for a predetermined time. In addition, a reset period for resetting the lighting state in the previous field is further provided at the head portion of SF1, which is the first subfield. In this reset period, all the cells are reset to lighted cells (cells in which wall charges are formed) or light-off cells (cells in which wall charges are not formed). In the former case, a predetermined cell is switched to a light-off cell, and in the latter case, the predetermined cell is switched to a lighted cell in the subsequent address period. The sustain period is gradually increased in the order of the subfields SF1 to SFN, and a predetermined gradation display is made possible by changing the number of subfields that are kept on.
[0018]
In the address period of each subfield shown in FIG. 5, address scanning is performed for each line. That is, at the same time as the scan pulse is applied to the row electrode Y1 constituting the first line, the column electrodes D1r, D1g, D1b, D2r... Dmb correspond to the address data corresponding to the cells of the first line. The data pulse DP1 is applied, and then the scan pulse is applied to the row electrode Y2 constituting the second line. At the same time, the data pulse DP2 corresponding to the address data corresponding to the second cell is applied to the column electrodes Z1 to Zm. Is applied. Similarly, the scan pulse and the data pulse are simultaneously applied to the third and subsequent lines. Finally, at the same time as the scanning pulse is applied to the row electrode Yn constituting the nth line, the column electrodes D1r, D1g, D1b, D2r... Dmb correspond to the address data corresponding to the cells of the nth line. The data pulse DPn is applied. As described above, in the address period, a predetermined cell is switched from the lit cell to the unlit cell, or from the unlit cell to the lit cell.
[0019]
When the address scan is completed in this way, all the cells in the subfield are set to either lighted cells or lighted cells, and only the lighted cells emit light every time the sustain pulse is applied in the next sustain period. repeat. As shown in FIG. 5, in the sustain period, the X sustain pulse and the Y sustain pulse are repeatedly applied to the row electrodes X1 to Xn and the row electrodes Y1 to Yn, respectively, at predetermined timings. The last subfield SFN is provided with an erasing period in which all the cells are set as extinguished cells.
[0020]
By repeating the fields as described above, it is possible to express gradation in a moving image by the plasma display panel 30.
[0021]
FIG. 6 shows an example in which the plasma display panel is vertically divided into two parts and the electrodes in the respective regions are separated. In this case, as shown in FIG. 6, the inspection machine main body 1 is provided with address drivers 11a and 11b, X sustain drivers 12a and 12b, and Y sustain drivers 13a and 13b connected to the electrodes of the plasma display panel 31. .
[0022]
As shown in FIG. 6, the plasma display panel 31 includes column electrodes D1r, D1g, D1b, D2r, D2g, D2b... Dmr, Dmg, Dmb, and a row electrode X1 provided in a direction orthogonal to these column electrodes. To Xi and row electrodes Y1 to Yi, column electrodes DA1r, DA1g, DA1b, DA2r, DA2g, DA2b... DAmr, DAmg, DAmb, and row electrodes Xi + 1 to Xn provided in directions orthogonal to these column electrodes And row electrodes Yi + 1 to Yn. Each column electrode is sequentially assigned to repeatedly correspond to the R cell, the G cell, and the B cell, and the R cell, the G cell, and the B cell are respectively assigned to the intersections of the row electrodes X1 to Xn and the row electrodes Y1 to Yn. It is formed. As in the case shown in FIG. 3, one pixel is formed with one set of R cell, G cell, and B cell arranged in succession.
[0023]
The column electrodes D1r, D1g, D1b, D2r, D2g, D2b... Dmr, Dmg, Dmb are address drivers 11a, and the column electrodes DA1r, DA1g, DA1b, DA2r, DA2g, DA2b ... DAmr, DAmg, DAmb are addresses. In the driver 11b, the row electrodes X1 to Xi are to the X sustain driver 12a, the row electrodes Y1 to Yi are to the Y sustain driver 13a, the row electrodes Xi + 1 to Xn are to the sustain driver 12b, and the row electrodes Yi + 1 to Yn are to the sustain driver 13b. Are connected to each other.
[0024]
The driving method of the plasma display panel 31 is the same as that of the plasma display panel 30 described above.
[0025]
Next, a procedure for inspecting the left and right ends of the plasma display panel 30 using the inspection apparatus 100 will be described. The inspection of the plasma display 31 can be similarly performed.
[0026]
As shown in FIG. 2, the plasma display panel 30 is set in the inspection machine body 1, and one pixel column at the left end and one pixel column at the right end in the display area of the plasma display panel 30, a total of two pixels. A pattern display is performed in which the columns are caused to emit light and an intermediate region sandwiched between these pixel columns is displayed black (non-light emission). The pixel column is composed of three adjacent display cell columns of R, G, and B.
[0027]
FIG. 7 shows various light emission patterns corresponding to the presence or absence of disconnection. FIG. 7A shows a case where there is no disconnection, and there are bright lines composed of three display cell columns (R, G, B) corresponding to one pixel column at each of the left and right ends. In this case, the six display cell rows in total on the left and right ends emit light without missing portions. The pattern shown in FIG. 7A is a detection pattern itself for detecting disconnection. FIG. 7B shows a case where the right end display cell row (R) is disconnected, and the display cell row (R) constituting the right end bright line is interrupted. FIG. 7C shows a case where there is a disconnection in the display cell row (R) at the right end, and the display cell row (R) constituting the bright line at the right end does not emit light at all. FIG. 7D shows a case where there is a disconnection in the rightmost display cell column. The middle part of the display cell column (R) constituting the rightmost bright line does not emit light, and this display cell column (R) ) Is divided up and down.
[0028]
The light emission pattern of the plasma display 30 is captured by the CCD camera 2, and the image processing apparatus 3 analyzes the light emission pattern based on the image data from the CCD camera 2.
[0029]
FIG. 8 is a flowchart showing processing at the time of inspection. The process of FIG. 8 is executed based on the control of the control device 4.
[0030]
In step S <b> 1 of FIG. 8, a driving pulse for causing the plasma display panel 30 to display the detection pattern is given by the inspection machine main body 1. Thereby, the plasma display panel 30 lights up with a light emission pattern as shown in FIGS. 7 (a) to 7 (d), for example. Also, the value of the number of disconnections is initialized to zero. Next, the image of the light emission pattern is captured by the CCD camera 2 (step S2), and the image data of the captured image is transferred from the CCD camera 2 to the image processing memory 3b of the image processing device 3 (step S3). Here, RGB three-color data is transferred separately.
[0031]
Next, of the image data stored in the image processing memory 3b, an area including the pixel column (three display cell columns) at the left end of the plasma display panel 30 is set as an image processing area (step S4). This region includes a non-light emitting display cell (display cell in the black display region) in the display area near the pixel column and a portion outside the display area (a portion on the left side of the display cell column). Set to Next, the image data of the set area is stored in the image processing target memory 3c (step S5).
[0032]
Next, based on the image data stored in the image processing target memory 3c, the process of extracting the light emitting cell row (R) in the leftmost display cell row is executed (step S6). Next, it is determined whether or not the leftmost light emitting cell row (R) is extracted in the light emitting cell row extraction process. If the determination is affirmative, the process proceeds to step S8, and if the determination is negative, the process proceeds to step S10 (step S7). ). In step S8, the length of the extracted light emitting cell row (R) is compared with the vertical length of the display area of the plasma display panel 30. Next, it is determined whether or not there is a light emitting cell row (R) whose vertical length is smaller than the vertical length of the display area of the plasma display panel 30, and if it is determined, the process proceeds to step S10. If it is determined not to proceed, the process proceeds to step S11 (step S9). In step S10, 1 is added to the number of disconnections of the column electrode, and the process proceeds to step S11.
[0033]
In step S11, it is determined whether or not the processing in steps S4 to S10 has been completed for all three display cell columns (R, G, B) constituting the leftmost pixel column. It progresses to step S4 and the process after step S4 is repeated about the following display cell row | line | column (for example, G). If the determination in step S11 is affirmative, the process proceeds to step S12. As described above, after the processing of step S4 to step S10 is executed for each color display cell row (R, G, B), the process proceeds to step S12.
[0034]
Next, of the image data stored in the image processing memory 3b, an area including a pixel column (three display cell columns) at the right end of the plasma display panel 30 is set as an image processing area (step S12). This region includes a non-light emitting display cell (display cell in the black display region) in the display area near the pixel column and a portion outside the display area (a portion on the right side of the display cell column). Set to Next, the image data of the set area is stored in the image processing target memory 3c (step S13).
[0035]
Next, based on the image data stored in the image processing target memory 3c, the process of extracting the light emitting cell row (R) in the rightmost display cell row is executed (step S14). Next, it is determined whether or not the rightmost light emitting cell row (R) is extracted in the light emitting cell row extraction process. If the determination is affirmative, the process proceeds to step S16, and if the determination is negative, the process proceeds to step S18 (step S15). ). In step S16, the length of the extracted light emitting cell row (R) is compared with the vertical length of the display area of the plasma display panel 30. Next, it is determined whether or not there is a light emitting cell row (R) whose vertical length is smaller than the vertical length of the display area of the plasma display panel 30. If it is determined not to proceed, the process proceeds to step S19 (step S17). In step S18, 1 is added to the number of disconnections of the column electrode, and the process proceeds to step S19.
[0036]
In step S19, it is determined whether or not the processing in steps S12 to S18 has been completed for all three display cell columns (R, G, B) constituting the rightmost pixel column, and if the determination is negative. Returning to step S12, the processing from step S12 onward is repeated for the next display cell string (for example, G). If the determination in step S19 is affirmative, the process ends. As described above, after the processes in steps S4 to S10 are executed for the display cell columns (R, G, B) of the respective colors, the process is terminated.
[0037]
As described above, in the process shown in FIG. 8, the light emitting cell row at the left end is extracted (step S6). If the light emitting cell row is not extracted (step S7: No), 1 is added to the number of disconnections. (Step S10). The case where the light emitting cell column is not extracted is a case where the display cell column (here, the rightmost display cell column) is not lit as shown in FIG. 7C, and the leftmost display cell column is disconnected. In this case, 1 is added to the number of disconnections. If the length of the extracted light emitting cell row is smaller than the vertical length of the display area of the plasma display panel 30 (step S9: “exists”), 1 is added to the number of disconnections (step S10). . The case where the length of the extracted light emitting cell row is smaller than the vertical length of the display area is, as shown in FIGS. 7B and 7D, the light emitting cell row (here, light emission at the right end). (Cell row) is interrupted in the middle, meaning that the display cell row at the left end is broken. In this case, 1 is added to the number of breaks.
[0038]
Further, in the process shown in FIG. 8, the light emitting cell row at the right end is extracted (step S14), and if the light emitting cell row is not extracted (step S15: No), 1 is added to the number of disconnections (step). S18). The case where the light emitting cell column is not extracted is a case where the display cell column at the right end is not lit, which means that the display cell column at the right end is disconnected. In this case, the number of disconnections is one. Is added. If the length of the extracted light emitting cell row is smaller than the vertical length of the display area of the plasma display panel 30 (step S17: “exists”), 1 is added to the number of disconnections (step S18). . The case where the length of the extracted light emitting cell row is smaller than the vertical length of the display area is when the light emitting cell row at the right end is interrupted in the middle, and the display cell row at the right end is broken. In this case, 1 is added to the number of disconnections.
[0039]
For example, when the light emission pattern is FIG. 7A, all the three light emitting cell columns at the left end are extracted (step S7: Yes), and the length of the light emitting cell column is the display area of the plasma display panel 30. It is not smaller than the length in the vertical direction (step S9: “does not exist”). Further, all the three light emitting cell rows at the left end are extracted (step S15: Yes), and the length of the light emitting cell row is not smaller than the vertical length of the display area of the plasma display panel 30 (step S17: “existence”). do not do"). Therefore, in this case, it can be seen that there is no disconnection in the column electrode in any of the display cell columns at the left and right end portions. In this case, the number of disconnections counted in the process of FIG.
[0040]
When the light emission pattern is shown in FIG. 7B, all three light emitting cell rows at the left end are extracted (step S7: Yes), and the length of the light emitting cell row is the horizontal direction of the display area of the plasma display panel 30. It is not smaller than the length (step S9: “does not exist”). Further, although all three light emitting cell rows at the right end are extracted (step S15: Yes), the length of the light emitting cell row (R) is smaller than the vertical length of the display area of the plasma display panel 30 (step S15). S17: “Exists”). Therefore, in this case, there is no disconnection for the leftmost display cell column, but it can be seen that there is a disconnection in the column electrode for the rightmost display cell column (R). In this case, the number of disconnections counted in the process of FIG.
[0041]
When the light emission pattern is shown in FIG. 7C, all the three light emitting cell columns at the left end are extracted (step S7: Yes), and the length of the light emitting cell column is the horizontal direction of the display area of the plasma display panel 30. It is not smaller than the length (step S9: “does not exist”). Further, the light emitting cell row (R) is not extracted from the rightmost light emitting cell row (step S15: No). For the other two light emitting cell rows (G, B) at the right end, the determination in step S15 is “Yes” and the determination in step S17 is “not present”. Therefore, in this case, there is no disconnection for the leftmost display cell column, but it can be seen that there is a disconnection in the column electrode for the rightmost display cell column (R). In this case, the number of disconnections counted in the process of FIG.
[0042]
When the light emission pattern is shown in FIG. 7D, all three light emitting cell rows at the left end are extracted (step S7: Yes), and the length of the light emitting cell row is the horizontal direction of the display area of the plasma display panel 30. It is not smaller than the length (step S9: “does not exist”). Further, although all three light emitting cell rows at the right end are extracted (step S15: Yes), the length of the light emitting cell row (R) is smaller than the vertical length of the display area of the plasma display panel 30 (step S15). S17: “Exists”). Therefore, in this case, there is no disconnection for the leftmost display cell column, but it can be seen that there is a disconnection in the column electrode for the rightmost display cell column (R). In this case, the number of disconnections counted in the process of FIG.
[0043]
As described above, in the display panel display inspection method according to the present embodiment, the detection pattern that lights only the display cell columns at the left and right ends of the display area is used. A difference in gradation can be ensured between the outside and the area. For this reason, it is possible to reliably detect the presence or absence of electrode disconnection in the display cell columns at the left and right end portions.
[0044]
In the above embodiment, a case has been described in which a plurality of display cell columns (three display cell columns) constituting one pixel column are inspected at the left end portion or the right end portion. The present invention can also be applied to the case where one display cell column is inspected for the left end portion or the right end portion.
[0045]
Moreover, in the said embodiment, although demonstrated about the test | inspection of the plasma display panel, the display panel display test | inspection method by this invention is widely applicable also to another display panel.
[Brief description of the drawings]
1A and 1B are diagrams illustrating a conventional inspection method, in which FIG. 1A is a diagram illustrating a disconnection at an intermediate portion, and FIG. 1B is a diagram illustrating a disconnection at an end portion;
FIG. 2 is a block diagram showing the configuration of an inspection apparatus used in a display inspection method for a plasma display panel.
FIG. 3 is a view showing an electrode arrangement and the like of a plasma display panel to be inspected.
FIG. 4 is a diagram showing a configuration of a field.
FIG. 5 is a timing chart showing drive pulses.
FIG. 6 is a diagram showing an example in which a plasma display panel is divided into two vertically.
7A and 7B are diagrams showing various light emission patterns according to the presence or absence of disconnection, where FIG. 7A is a diagram showing a case where there is no disconnection, and FIGS. 7B and 7C are display cell columns at the right end. The figure which shows the case where there is a disconnection.
FIG. 8 is a flowchart showing processing during inspection.
[Explanation of symbols]
1 Inspection machine body (light emitting means)
2 Image sensor (CCD camera)
3 Image processing device (determination means)
D1r, D1g-Dmb column electrode

Claims (8)

A plurality of row electrodes and a plurality of column electrodes arranged in a direction orthogonal to the plurality of row electrodes and forming display cells at intersections with the row electrodes, and arranged in a matrix in a display area A display panel display inspection method for inspecting a line defect of a display panel that displays an image by controlling light emission of a display cell,
At least one of the leftmost display cell column including at least the leftmost display cell column adjacent to the outside of the display area or the rightmost display cell column including at least the rightmost display cell column adjacent to the outside of the display area is to be inspected. light is emitted as a display cell columns except the display cell row of said object by a non-light-emitting, and the display cells of the display cell row of said object, the display cell and the display of the inspection target outside near the display cell and a portion outside the area detected by the image sensor, based on the output video signal, detecting the number and length of the column direction of the bright line corresponding to the display cell columns of said object, the number of the bright line and When the length is less than a predetermined value, it is determined that a disconnection has occurred in the column electrode corresponding to the display cell column. 2. The method according to claim 1, wherein when the length of the detected bright line is shorter than the length of the display area in the column direction, it is determined that a disconnection has occurred in the row electrode corresponding to the display cell column. The display inspection method of the display panel as described in 2. A plurality of row electrodes and a plurality of column electrodes arranged in a direction orthogonal to the plurality of row electrodes and forming display cells at intersections of the row electrodes, and having three different colors of light emission arranged in the row direction The display cells constitute one pixel and the display cells having the same emission color are arranged side by side in the column direction, and an image is displayed by controlling the light emission of the display cells arranged in a matrix in the display area. A display panel inspection method for inspecting a display panel for line defects,
At least any one of the pixel rows of the leftmost portion or rightmost portion adjacent to the outside of the display area is caused to emit light as the inspection target, the pixel rows except the pixel column of the test object by the non-light emission, of said object and each display cell of the pixel column, and a viewing cell and the display area outside the portion of the test subject to near the display cell was detected by the image sensor, based on the output video signal, to said inspected image Motoretsu detecting the number and length of the corresponding column of the bright lines, if the number and length of the bright line is less than a predetermined value, it is determined that the disconnection to the column electrode corresponding to the picture Motoretsu occurs Display panel display inspection method characterized by the above. 4. The method according to claim 3, wherein when the length of the detected bright line is shorter than the length of the display area in the column direction, it is determined that a disconnection has occurred in the row electrode corresponding to the pixel column. The display inspection method of the display panel as described. A plurality of row electrodes and a plurality of column electrodes arranged in a direction orthogonal to the plurality of row electrodes and forming display cells at intersections with the row electrodes, and arranged in a matrix in a display area A display panel display inspection apparatus that inspects a line defect of a display panel that displays an image by controlling light emission of a display cell,
At least one of the leftmost display cell column including at least the leftmost display cell column adjacent to the outside of the display area or the rightmost display cell column including at least the rightmost display cell column adjacent to the outside of the display area is to be inspected. and light is emitted, the light emission control means for the display cell columns except the display cell row of said object Ru is no light as,
An image sensor for detecting the respective display cells of the display cell row of said object, and a Viewing cell and the display area outside the portion of the test subject to near the display cell,
Based on the video signal output from the image sensor, the number and length of bright lines in the column direction corresponding to the display cell column to be inspected are detected, and the number and length of the bright lines are less than a predetermined value. Determining means for determining that a disconnection has occurred in the column electrode corresponding to the display cell column;
A display inspection apparatus for a display panel, comprising: The determination means determines that a disconnection has occurred in a row electrode corresponding to the display cell column when the length of the detected bright line is shorter than the length of the display area in the column direction. The display inspection apparatus for a display panel according to claim 5. A plurality of row electrodes and a plurality of column electrodes arranged in a direction orthogonal to the plurality of row electrodes and forming display cells at intersections of the row electrodes, and having three different colors of light emission arranged in the row direction The display cells constitute one pixel and the display cells having the same emission color are arranged side by side in the column direction, and an image is displayed by controlling the light emission of the display cells arranged in a matrix in the display area. A display panel inspection device for inspecting a display panel for line defects,
Light is emitted as the test object at least one of a pixel column of the leftmost portion or rightmost portion adjacent to the outside of the display area, a light emission control unit Ru is a non-light-emitting pixel columns except the pixel rows of said object,
An image sensor for detecting the respective display cells of the pixel columns of said object, and a Viewing cell and the display area outside the portion of the test subject to near the display cell,
Based on the video signal output from the image sensor, to detect the number and length of the column direction of the bright lines corresponding to said inspected image Motoretsu, number and length of the bright line is less than a predetermined value A determination means for determining that a disconnection has occurred in the column electrode corresponding to the display pixel column;
A display inspection apparatus for a display panel, comprising: The determination means determines that a disconnection has occurred in a row electrode corresponding to the pixel column when the length of the detected bright line is shorter than the length of the display area in the column direction. The display inspection apparatus for a display panel according to claim 7.

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