CN1494047A - Display checking method and apparatus for display panel - Google Patents

Display checking method and apparatus for display panel Download PDF

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Publication number
CN1494047A
CN1494047A CNA031328954A CN03132895A CN1494047A CN 1494047 A CN1494047 A CN 1494047A CN A031328954 A CNA031328954 A CN A031328954A CN 03132895 A CN03132895 A CN 03132895A CN 1494047 A CN1494047 A CN 1494047A
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CN
China
Prior art keywords
display unit
display
viewing area
column
electrode
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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CNA031328954A
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Chinese (zh)
Inventor
白川裕也
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Pioneer Corp
Pioneer Display Products Corp
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Pioneer Corp
Pioneer Display Products Corp
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Priority claimed from JP2002216679A external-priority patent/JP3863079B2/en
Priority claimed from JP2002216678A external-priority patent/JP3863078B2/en
Priority claimed from JP2002224511A external-priority patent/JP2004069307A/en
Priority claimed from JP2002224512A external-priority patent/JP2004069308A/en
Application filed by Pioneer Corp, Pioneer Display Products Corp filed Critical Pioneer Corp
Publication of CN1494047A publication Critical patent/CN1494047A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/28—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

Provided is a display inspection method and a display inspection device for a display panel, which can securely detect a line defect.A display cell column at the upper edge or the lower edge in the display area is made so as to emit light. Each luminous display cell, a non-luminous display cell in the display area near the luminous display cell, and a part outside the display area are detected by an image sensor, and the number and the length of bright lines in the column direction corresponding to the luminous display cell row at the upper edge or the lower edge are detected on the basis of the output video signal thereof. When the number and the length of the bright lines are less than prescribed values, it is judged that the row electrode corresponding to the display cell column is disconnected.

Description

Be used for the demonstration method of inspection of display board and show verifying attachment
Technical field
The present invention relates to a kind of demonstration method of inspection etc., be used to check the electrode of the display board that constitutes with matrix form arrangement display unit to open circuit, and a kind of demonstration method of inspection etc., be used for the short circuit between the inspecting electrode.
Background technology
Check with matrix form as traditional being used for and to arrange the method that the electrode of the plasma display panel that display unit constitutes opens circuit, normally adopt complete surperficial display mode, as view data, and use graphical analysis to come detection failure display mode.If occurred opening circuit in the electrode of the plasma display panel 30 shown in Figure 1A or Fig. 2 A, a non-luminous part has then just appearred on this display line.Therefore, compare with the gray scale of two neighbors that lay respectively at this display line bottom and upper segment by the gray scale that the display line that opens circuit will be arranged, perhaps will there be the gray scale of the display line that opens circuit to compare, just can extracts the fault of this line easily with the gray scale of two neighbors on the left side that lays respectively at this display line and the right.
Known display board includes many column electrodes, many row electrodes of arranging on the direction perpendicular to column electrode and be formed on column electrode and the R (red) at the point of crossing of row electrode place, G (green), the display unit of B (indigo plant) color.In this display board, when the short circuit between the detection adjacent electrode, monochromatic mode (R, G or B pattern) is displayed on the entire display panel.In this case, if having short circuit between the adjacent electrode then the display unit of another kind of color will be luminous.Thereby the short circuit between can detecting electrode.
If there is the display line that opens circuit to appear at the head portion or the bottom part of the viewing area shown in Figure 1B, perhaps appear at the left end portion or the right end portion of the viewing area shown in Fig. 2 B, the gray scale of the line faulty component that then causes by opening circuit and the gray scale of outside, viewing area are basic identical, open circuit thereby use above-mentioned method just to be difficult to detect this.On the other hand, if the gray scale of a neighbor in the gray scale of alternative line faulty component and the viewing area, the horizontality in the just necessary strict guarantee viewing area, and do not allow to exist in the viewing area distortion.Therefore be difficult to adopt this method.
Summary of the invention
The purpose of this invention is to provide a kind of demonstration method of inspection that is used for display board and show verifying attachment, can detect the line fault in upper part in the viewing area or the end portion reliably, or the line fault in left end portion or the right end portion in the viewing area.
The types of display panels that has a kind of its row electrode on the vertical direction of display board, to be divided.In such display board, the short circuit meeting in the row electrode group 101 and 102 of dividing in vertical direction shown in Figure 3 between the row electrode causes the line fault that hinders normal demonstration.Under the situation of the detection method that adopts monochromatic mode to show on the entire display panel, the short circuit between the row electrode of upper and lower can't influence demonstration above-mentioned.Therefore the short circuit between the row electrode of upper and lower can not be detected.
Another object of the present invention provides a kind of demonstration method of inspection and a kind of demonstration verifying attachment that is used for display board, thereby the short circuit that can detect between the upper and lower row electrode of appearance is separated from each other out them.
In addition, between the adjacent lines electrode of plasma display panel, occur under the situation of short circuit, can cause not occurring in the whole surperficial display board problem of concealed wire, thereby the short circuit between the column electrode can not be detected.
Another object of the present invention provides a kind of demonstration method of inspection and a kind of demonstration verifying attachment that is used for display board, can detect the short circuit between the column electrode reliably.
Above-mentioned purpose of the present invention can realize by a kind of demonstration method of inspection to display board, this method is used for checking the line fault of display board, this display board comprises a plurality of column electrodes and a plurality of row electrodes to arrange perpendicular to the direction of column electrode, to form display unit at column electrode and row electrode crossings place, this display board is display image by the light emission of controlling the display unit of arranging with matrix form in the viewing area, and this demonstration method of inspection comprises following processing: make the display unit that is arranged in top, viewing area or bottom capable luminous; Utilize imageing sensor to detect luminous display unit, be arranged near the luminescence display unit and be positioned at viewing area and non-luminous display unit, and be positioned at the part outside the viewing area, and export a vision signal; According to the vision signal of output, detect number and length corresponding to the capable bright line on line direction of the luminescence unit of top or bottom; When the number of bright line and length during, judge corresponding to occurring opening circuit in the capable column electrode of display unit less than predetermined value.
Above-mentioned purpose of the present invention can realize by a kind of demonstration method of inspection to display board, this method is used for checking the line fault of display board, this display board comprises a plurality of column electrodes and a plurality of row electrodes to arrange perpendicular to the direction of column electrode, to form display unit at column electrode and row electrode crossings place, this display board is display image by the light emission of controlling the display unit of arranging with matrix form in the viewing area, and this demonstration method of inspection comprises following processing: make the columns of display elements that is arranged in viewing area left end or right-hand member luminous; Utilize imageing sensor to detect luminous display unit, be arranged near the luminescence display unit and be positioned at viewing area and non-luminous display unit, and be positioned at the part outside the viewing area, and export a vision signal; According to the vision signal of output, detection is corresponding to the number and the length of the bright line on column direction of the luminescence unit row of left end or right-hand member; When the number of bright line and length during, judge in the row electrode corresponding to columns of display elements to occur opening circuit less than predetermined value.
Above-mentioned purpose of the present invention can realize by a kind of demonstration method of inspection to display board, this method is used for checking the line fault of display board, this display board comprises a plurality of column electrodes and a plurality of row electrodes to arrange perpendicular to the direction of column electrode, to form display unit at column electrode and row electrode crossings place, thereby display unit is arranged their luminous colors on line direction be three kinds of colors and differ from one another and form a pixel, the display unit of emission same color light is arranged on the column direction, this display board is display image by the light emission of controlling the display unit of arranging with matrix form in the viewing area, and this demonstration method of inspection comprises following processing: make the columns of display elements that is arranged in viewing area left end or right-hand member luminous; Utilize imageing sensor to detect luminous display unit, be arranged near the luminescence display unit and be positioned at viewing area and non-luminous display unit, and be positioned at the part outside the viewing area, and export a vision signal; According to the vision signal of output, detection is corresponding to the number and the length of the bright line on column direction of the luminescence unit row of left end or right-hand member; When the number of bright line and length during, judge in the row electrode corresponding to columns of display elements to occur opening circuit less than predetermined value.
Above-mentioned purpose of the present invention can realize by a kind of demonstration method of inspection to display board, this method is used to check the line fault between the row electrode that separates on the display board, this display board comprises a plurality of column electrodes and a plurality of row electrodes to arrange perpendicular to the direction of column electrode, to form display unit at column electrode and row electrode crossings place, above-mentioned row electrode is divided with column direction in the viewing area, when with a behavior unit, form display board so that may side by side select display unit in the screen that separates that obtains by division, this demonstrations method of inspection comprises following processing: make one in the screen that the upper and lower that obtains by division separates to launch monochromatic light; Utilize imageing sensor to detect in the screen that top or bottom as non-luminous screen that separates separate another, and export a vision signal; According to the vision signal of output, detect the bright line on column direction of the columns of display elements in the screen that separates corresponding to the upper and lower another; Judge between the column electrode that separates of the corresponding columns of display elements that detects bright line thereon and electric pole short circuit occurs.
Above-mentioned purpose of the present invention can realize by a kind of demonstration method of inspection to display board, this method is used for checking the line fault of display board between the row electrode that separates, this display board comprises a plurality of column electrodes and a plurality of row electrodes to arrange perpendicular to the direction of column electrode, to form display unit at column electrode and row electrode crossings place, thereby display unit is arranged their luminous colors on line direction be three kinds of colors and differ from one another, and form a pixel, the display unit of emission same color light is arranged on the column direction, above-mentioned row electrode is divided with column direction in the viewing area, when with a behavior unit, form display board so that may side by side select display unit in the screen that separates that obtains by division, this demonstrations method of inspection comprises following processing: make one in the screen that the upper and lower that obtains by division separates to launch monochromatic light; Utilize imageing sensor to detect upper and lower as non-luminous screen that separates and separate in the screen another, and export a vision signal; According to the vision signal of output, detect corresponding to the upper and lower and separate another the bright line on column direction of columns of display elements in the screen; Judge between the column electrode that separates of the corresponding columns of display elements that detects bright line thereon and electric pole short circuit occurs.
Above-mentioned purpose of the present invention can realize by a kind of demonstration method of inspection to display board, this method is used for checking the line fault of display board, this display board comprises a plurality of column electrodes and a plurality of row electrodes to arrange perpendicular to the direction of column electrode, to form display unit at column electrode and row electrode crossings place, this display board is display image by the light emission of controlling the display unit of arranging with matrix form in the viewing area, and this demonstration method of inspection comprises following processing: make the display unit in the viewing area luminous with the sawtooth case form; Utilize the display unit in the imageing sensor detection viewing area, and export a vision signal; According to the concealed wire on the video signal detection line direction of output; Judgement detects thereon between the capable column electrode of the display unit of concealed wire in correspondence and electric pole short circuit occurs.
Above-mentioned purpose of the present invention can realize by a kind of demonstration verifying attachment that is used for display board, this device is used for checking the line fault of display board, this display board comprises a plurality of column electrodes and a plurality of row electrodes to arrange perpendicular to the direction of column electrode, to form display unit at column electrode and row electrode crossings place, this display board is display image by the light emission of controlling the display unit of arranging with matrix form in the viewing area, this demonstration verifying attachment comprises: light-emitting device is used to make the display unit that is positioned at top, viewing area or bottom capable luminous; Imageing sensor is used to detect luminous display unit, is arranged near the luminescence display unit and is positioned at viewing area and non-luminous display unit, and be positioned at the part outside the viewing area, and export a vision signal; And judgment means, be used for detecting number and length corresponding to the capable bright line on line direction of the luminescence unit that is positioned at top or bottom according to vision signal from described imageing sensor output; When the number of bright line and length during, judge corresponding to occurring opening circuit in the capable column electrode of display unit less than predetermined value.
Above-mentioned purpose of the present invention can realize by a kind of demonstration verifying attachment that is used for display board, this device is used for checking the line fault of display board, this display board comprises a plurality of column electrodes and a plurality of row electrodes to arrange perpendicular to the direction of column electrode, to form display unit at column electrode and row electrode crossings place, this display board is display image by the light emission of controlling the display unit of arranging with matrix form in the viewing area, this demonstration verifying attachment comprises: light-emitting device is used to make the columns of display elements that is positioned at viewing area left end or right-hand member luminous; Imageing sensor is used to utilize imageing sensor to detect luminous display unit, is arranged near the luminescence display unit and is positioned at viewing area and non-luminous display unit, and be positioned at the part outside the viewing area, and export a vision signal; And judgment means, be used for vision signal according to output, detection is corresponding to the number and the length of the bright line on column direction of the luminescence unit row that are positioned at left end or right-hand member, when the number of bright line and length during less than predetermined value, judges in the row electrode corresponding to columns of display elements to occur opening circuit.
Above-mentioned purpose of the present invention can realize by a kind of demonstration verifying attachment that is used for display board, this device is used for checking the line fault of display board, this display board comprises a plurality of column electrodes and a plurality of row electrodes to arrange perpendicular to the direction of column electrode, to form display unit at column electrode and row electrode crossings place, thereby display unit is arranged their luminous colors on line direction be three kinds of colors and differ from one another, and form a pixel, the display unit of emission same color light is arranged on the column direction, this display board is display image by the light emission of controlling the display unit of arranging with matrix form in the viewing area, this demonstration verifying attachment comprises: light-emitting device is used to make the columns of display elements that is positioned at viewing area left end or right-hand member luminous; Imageing sensor is used to utilize imageing sensor to detect luminous display unit, is arranged near the luminescence display unit and is positioned at viewing area and non-luminous display unit, and be positioned at the part outside the viewing area, and export a vision signal; And judgment means, be used for vision signal according to output, detection is corresponding to the number and the length of the bright line on column direction of the luminescence unit row that are positioned at left end or right-hand member, when the number of bright line and length during less than predetermined value, judges in the row electrode corresponding to columns of display elements to occur opening circuit.
Above-mentioned purpose of the present invention can realize by a kind of demonstration verifying attachment that is used for display board, this device is used to check the line fault between the row electrode that separates on the display board, this display board comprises a plurality of column electrodes and a plurality of row electrodes to arrange perpendicular to the direction of column electrode, to form display unit at column electrode and row electrode crossings place, above-mentioned row electrode is divided with column direction in the viewing area, when with a behavior unit, form display board so that may separately side by side select display unit in the screen what obtain by division, this demonstration verifying attachment comprises: light-emitting device is used for making the upper and lower that obtains by division to separate an emission monochromatic light of screen; Imageing sensor is used for utilizing imageing sensor to detect as non-luminous separately upper and lower of screen and separates another of screen, and exports a vision signal; Judgment means, be used for vision signal according to output, detection separates the bright line on column direction of the columns of display elements in the screen another corresponding to the upper and lower, judges between the column electrode that separates of the corresponding columns of display elements that detects bright line thereon electric pole short circuit to occur.
Above-mentioned purpose of the present invention can realize by a kind of demonstration verifying attachment that is used for display board, this device is used to check the line fault between the row electrode that separates on the display board, this display board comprises a plurality of column electrodes and a plurality of row electrodes to arrange perpendicular to the direction of column electrode, to form display unit at column electrode and row electrode crossings place, thereby display unit is arranged their luminous colors on line direction be three kinds of colors and differ from one another, and form a pixel, the display unit of emission same color light is arranged on the column direction, above-mentioned row electrode is divided with column direction in the viewing area, when with a behavior unit, form display board so that can separately side by side select display unit in the screen what obtain by division, this demonstration verifying attachment comprises: light-emitting device is used for making the upper and lower that obtains by division to separate an emission monochromatic light of screen; Imageing sensor is used for utilizing imageing sensor to detect as non-luminous separately upper and lower of screen and separates another of screen, and exports a vision signal; Judgment means, be used for vision signal according to output, detection separates the bright line on column direction of the columns of display elements in the screen another corresponding to the upper and lower, and that judges the corresponding columns of display elements that detects bright line thereon separately electric pole short circuit occurs between the column electrode.
Above-mentioned purpose of the present invention can realize by a kind of demonstration verifying attachment that is used for display board, this device is used for checking the line fault of display board, this display board comprises a plurality of column electrodes and a plurality of row electrodes to arrange perpendicular to the direction of column electrode, to form display unit at column electrode and row electrode crossings place, this display board is display image by the light emission of controlling the display unit of arranging with matrix form in the viewing area, this demonstration verifying attachment comprises: light-emitting device is used for making the display unit of viewing area luminous with the sawtooth case form; Imageing sensor is used for utilizing imageing sensor to detect the display unit of viewing area, and exports a vision signal; Judgment means is used for according to the concealed wire on the video signal detection line direction of output, and judges to detect thereon between the capable column electrode of the display unit of concealed wire in correspondence and electric pole short circuit occurs.
Description of drawings
Figure 1A and 1B are the block schemes of the traditional method of inspection of expression, and Figure 1A is that the expression center section has the block scheme that opens circuit, and Figure 1B is that the expression end has the block scheme that opens circuit;
Fig. 2 A and 2B are the block schemes of the traditional method of inspection of expression, and Fig. 2 A is that the expression center section has the block scheme that opens circuit, and Fig. 2 B is that the expression end has the block scheme that opens circuit;
Fig. 3 is the block scheme of the traditional method of inspection of expression;
Fig. 4 is the block diagram that expression is used for the verifying attachment that the demonstration method of inspection of plasma display panel uses;
Fig. 5 is the block scheme of the electrode spread of the plasma display panel that expression will be verified;
Fig. 6 is the block diagram of a field structure of expression;
Fig. 7 is the sequential chart of expression driving pulse;
Fig. 8 is that the expression plasma display panel is divided equally and is the example block diagram in two parts zone up and down;
Fig. 9 A, 9B, 9C, 9D are expressions according to the block scheme that whether has the various light-emitting modes that show of opening circuit, and wherein Fig. 9 A is the block diagram of representing not exist under the situation about opening circuit; Fig. 9 B is illustrated in the display unit of bottom to have block diagram under the situation about opening circuit in capable; Fig. 9 C is illustrated in the display unit of top and bottom to have block diagram under the situation about opening circuit in capable respectively; Fig. 9 D is illustrated in the display unit of top and bottom to have block diagram under the situation about opening circuit in capable respectively;
Figure 10 is the process flow diagram that is illustrated in the processing of being carried out when checking;
Figure 11 A, 11B, 11C, 11D are expressions according to the block scheme that whether has the various light-emitting modes that show of opening circuit, and wherein Figure 11 A is the block diagram of representing not exist under the situation about opening circuit; Figure 11 B, 11C, 11D are illustrated in right-hand member to have block diagram under the situation about opening circuit in display unit is capable;
Figure 12 is the process flow diagram that is illustrated in the processing of being carried out when checking;
Figure 13 is the block scheme of the electrode spread of the plasma display panel that expression will be verified;
Figure 14 A, 14B, 14C be expression according to the block scheme of the light-emitting mode that whether exists short circuit to show between the row electrode, wherein Figure 14 A is the block diagram that does not exist between the expression row electrode under the situation of short circuit; Figure 14 B is the block diagram that exists between the expression row electrode under the situation of short circuit, and Figure 14 C is the block diagram of the short circuit part between the expression row electrode;
Figure 15 is the process flow diagram that is illustrated in the processing of being carried out when checking;
Figure 16 A and 16B are the block diagrams that there is not light-emitting mode under the situation of short circuit between the column electrode in expression, and wherein whether Figure 16 A represents the luminous block diagram in each unit; Figure 16 B is the block diagram of expression sawtooth lattice pattern formula;
Figure 17 A, 17B, 17C are the block schemes that is illustrated in light-emitting mode under the situation that has short circuit between the column electrode, and wherein Figure 17 A is the block diagram of the whole viewing area of expression; Figure 17 B is the view that the part of presentation graphs 17A is exaggerated, and Figure 17 C is the block diagram of the short circuit part between the expression column electrode; And
Figure 18 is the process flow diagram that is illustrated in the processing of being carried out when checking.
Embodiment
(first embodiment)
Below, with reference to Fig. 4 to 10 embodiment according to the demonstration method of inspection of display board of the present invention is described.
Fig. 4 is the block diagram that expression is used for the verifying attachment that the demonstration method of inspection of plasma display panel uses.Fig. 5 is the block scheme of the electrode spread of the plasma display panel 30 that expression will be verified.
As shown in Figure 4, verifying attachment 100 comprises a checking machine main body 1, be used in check, illuminating plasma display panel 30, a ccd video camera 2 is used to obtain the image of plasma display panel 30 display surfaces, an image processing apparatus 3, be used to receive vision signal from ccd video camera 2 outputs, with a control device 4, be used for control test machine main body 1, ccd video camera 2 and image processing apparatus 3.Image processing apparatus 3 comprises image processing section 3a, be used for carries out image processing so that analyze the optical transmission mode of the following stated, Flame Image Process storer 3b, be used to store ccd video camera 2 and be each R, G, view data that B provides and Flame Image Process object memories 3c are used for the data of temporary transient memory image process object.
As shown in Figure 5, checking machine main body 1 comprises that with the address driver 11 that the electrode of plasma display panel 30 is connected, X keeps driver 12 and Y keeps driver 13.
As shown in Figure 5, plasma display panel 30 comprises row electrode D1r, D1g, D1b, D2r, D2g, D2b......Dmr, Dmg and Dmb, column electrode X1 to Xn and with the column electrode Y1 that arranges perpendicular to the direction of row electrode to Yn.As shown in Figure 5, the row electrode that is disposed can with described order repeatedly with the R unit, the G unit, the B unit is relevant.In the 30a of viewing area, R unit, G unit, B unit are respectively formed at the row electrode and column electrode X1 locates to the point of crossing of Yn to Xn and column electrode Y1.As shown in Figure 5, the continuous R unit that forms, G unit, B unit are used as a group, and this group has formed a pixel.Viewing area part 30b outside outside the 30a of viewing area, also arranging to have.
As shown in Figure 5, thus they can extend from a side relative to each other column electrode X1 by alternate configurations with the form of pectination to Xn and column electrode Y1 to Yn.It is capable that in the Yn one of column electrode X1 in the Xn and column electrode Y1 is assigned to a display unit.In a unit, thereby arranged abreast to Yn to Xn and column electrode Y1 can be toward each other for column electrode X1.
As shown in Figure 5, row electrode D1r, D1g, D1b, D2r......Dmb are connected to address driver 11, and column electrode X1 is connected to X to Xn and keeps driver 12, and column electrode Y1 is connected to Y to Yn and keeps driver 13.
A kind of driving method that is used for plasma display panel 30 below will be described.
A field as an interval that drives plasma display panel 30 is made of to SFN an a plurality of son SF1.As shown in Figure 6, in each son, all be useful on selection at interval and make the unit of selecting at interval in the address continue to be illuminated the interval of keeping of one period schedule time with the address of the unit that is illuminated.Head portion at first a son SF1 also provides reseting interval, is used for previous the state that illuminates that resets.At this reseting interval, all unit all are reset to illuminate unit (wherein forming the unit of wall electric charge) or be reset to and extinguish unit (put-outcell) (wherein not forming the unit of wall electric charge).In the previous case, scheduled unit is switched to and extinguishes the unit.Under latter event, predetermined unit switches in interval, address subsequently and illuminates the unit.Keep the interval with a son SF1, SF2 ... the order of SFN is prolonged step by step.Can realize that by the sub-number of fields order that change continues to be illuminated predetermined gray scale shows.
In the interval, address of each son field as shown in Figure 7, address scan can be by the carrying out by line.In other words, be applied to column electrode Y1 at scanning impulse and form the first-line while, data pulse DP1 foundation is applied to row electrode D1r corresponding to the address date of the unit on first line, D1g, and D1b is on the D2r...Dmb.Order, be applied to column electrode Y2 at scanning impulse and form the second-line while, data pulse DP2 foundation is applied to row electrode D1r corresponding to the address date of a unit on second line, D1g, D1b is on the D2r...Dmb.Scanning impulse and data pulse side by side are applied to the unit on each three-way and subsequently line in the same manner.At last, be applied to when column electrode Yn forms the n line at scanning impulse, data pulse DPn is according to being applied to row electrode D1r corresponding to the address date of a unit on the n line, D1g, and D1b is on the D2r...Dmb.The address at interval in, predetermined unit is switched to and extinguishes the unit from illuminating the unit, or is switched to and illuminates the unit from extinguishing the unit.
If address scan finishes, then son each interior unit is set to illuminate the unit or extinguishes the unit.Subsequently keep at interval in, when keeping pulse and be applied in, only illuminate the emission of unit weighs compound light.In keeping at interval, X keep pulse and Y keep pulse as shown in Figure 7 with preset time repeatedly be applied to respectively column electrode X1 to Xn and column electrode Y1 to Yn.In a last son SFN, comprise that also one is removed at interval, is provided for all unit all are set to extinguish the unit.
By repeat fields as mentioned above, can be implemented in and use the gray scale of dynamic menu to represent on the plasma display panel 30.
Fig. 8 shows plasma display panel and is divided equally and be a two-part example up and down, and the electrode of various piece also is separated from each other.In this case, provide the address driver 11a and the 11b that link to each other with the electrode of plasma display panel 31 in the checking machine main body, X keeps driver 12a and 12b, and Y keeps driver 13a and 13b, as shown in Figure 8.
As shown in Figure 8, plasma display panel 31 also comprises row electrode D1r, D1g, D1b, D2r, D2g, D2b...Dmr, Dmg and Dmb, with arrange perpendicular to the direction of row electrode column electrode X1 to Xi and column electrode Y1 to Yi, display board 31 also comprises row electrode DA1r, DA1g, DA1b, DA2r, DA2g, DA2b...DAmr, DAmg, DAmb, with arrange perpendicular to the direction of row electrode column electrode Xi+1 to Xn and column electrode Yi+1 to Yn.Each row electrode be assigned with described order in case with the R unit, G unit and B unit repeatedly are associated.R unit, G unit and B unit are respectively formed at the row electrode and column electrode X1 locates to the point of crossing of Yn to Xn and column electrode Y1.In the mode identical with situation shown in Figure 5, the R unit that is disposed in succession, G unit and B unit form a group, and this group has formed a pixel.
Row electrode D1r, D1g, D1b, D2r, D2g, D2b...Dmr, Dmg and Dmb are connected to address driver 11a.Row electrode DA1r, DA1g, DA1b, DA2r, DA2g, DA2b...DAmr, DAmg, DAmb are connected to address driver 11b.Column electrode X1 is connected to X to Xi and keeps driver 12a.Column electrode Y1 is connected to Y to Yi and keeps driver 13a.Column electrode Xi+1 is connected to X to Xn and keeps driver 12b.Column electrode Yi+1 is connected to Y to Yn and keeps driver 13b.
The driving method that is used for plasma display panel 31 is identical with the driving method of above-mentioned plasma display panel 30.
Service test device 100 below will be described and carry out the step that the part of the upper and lower side of article on plasma body display board 30 is tested.Also can carry out in an identical manner the check that the plasma display panel of dividing equally for top and the bottom 31 carries out.
As shown in Figure 4, plasma display panel 30 is arranged in the checking machine main body 1.A display unit on the top is capable and capable at a display unit of bottom, that is, in the viewing area of plasma display panel 30, have two display units capable be used to luminous.Be clipped in the center section of these two a little display units between capable and be used to show blank screen (that is, make its not luminous).Carry out the demonstration of this pattern.Fig. 9 A, 9B, 9C, 9D represent whether basis exists the various light-emitting modes that open circuit and demonstrate.Fig. 9 A represents not exist situation about opening circuit, and corresponding to the capable bright line that two horizontal bars are arranged of two display units of top and bottom.Pattern shown in Fig. 9 A is exactly to be used to detect the detecting pattern that opens circuit.Fig. 9 B is illustrated in the display unit of bottom and has situation about opening circuit in capable, and has been interrupted in the middle of it at a bright line of bottom.Fig. 9 C represents to have situation about opening circuit in the display unit provisional capital of top and bottom respectively, and its centre of each bright line of top and bottom has all been interrupted.Fig. 9 D represents respectively to have situation about opening circuit in the display unit provisional capital of top and bottom, and the top do not have bright line, and the bright line of bottom has been interrupted in the middle of it.
This light-emitting mode of plasma display panel 30 is by ccd video camera 2 records (take-in).Image processing apparatus 3 is analyzed light-emitting mode according to the view data that ccd video camera 2 provides.
The process flow diagram of performed processing when Figure 10 is illustrated in check.Processing shown in Figure 10 is to carry out according to the control that control device 4 carries out.
In the step S1 of Figure 10,, driving pulse shows above-mentioned detecting pattern thereby being provided for plasma display panel 30 by checking machine main body 1.As a result, plasma display panel 30 be illuminated into, for example, as Fig. 9 A to the light-emitting mode shown in the 9D.And the value of the number that opens circuit is initialized to 0.Subsequently, the image of light-emitting mode is by ccd video camera 2 records (step S2).The view data of the image that is recorded is transferred among the Flame Image Process storer 3b the image processing apparatus 3 (step S3) from ccd video camera 2.Here, three kinds of color R, G, the data of B are separately to transmit.
Subsequently, in the view data of from Flame Image Process storer 3b, storing, comprise that a capable zone of display unit that is positioned at plasma display panel 30 tops is set as Flame Image Process zone (step S4).This zone be set to comprise be arranged in above-mentioned display unit capable near and be positioned at viewing area and non-luminous display unit (promptly, display unit in black viewing area) and be positioned at part outside the viewing area (that is, being positioned at the part of display unit more than capable).Subsequently, the view data in preset regions is stored among the Flame Image Process object memories 3c (step S5).
Subsequently, according to the view data of storing among the Flame Image Process object memories 3c, carry out the capable processing (step S6) of display unit capable extraction luminescence unit from being arranged in the top.Subsequently, judge the luminescence unit be arranged in the top capable whether to luminescence unit capable extraction handle and be extracted.Under sure estimate of situation, handle proceeding to step S8.Under the estimate of situation negating, handle proceeding to step S10 (step S7).At step S8, the length that the luminescence unit that is extracted is capable is compared with the horizontal length of viewing area in the plasma display panel 30.Subsequently, judge whether to exist horizontal length capable less than a luminescence unit of the horizontal length of viewing area on the plasma display panel 30.If judge to exist such luminescence unit capable, then handle proceeding to step S10.If judge not exist such luminescence unit capable, then handle proceeding to step S11 (step S9).At step S10, the number that opens circuit of column electrode increases by 1, handles proceeding to step S11.
In the view data of from Flame Image Process storer 3b, storing, comprise that the capable zone of display unit that is arranged in plasma display panel 30 bottoms is set to the Flame Image Process zone at step S11.That this zone is set to comprise is non-luminous, in the viewing area, be positioned at above-mentioned display unit near capable display unit (that is the display unit in the black viewing area) and be positioned at part outside the viewing area (that is, being positioned at the part of display unit more than capable).Subsequently, the view data in the preset regions is stored among the Flame Image Process object memories 3c (step S12).
Subsequently, according to the view data that is stored among the Flame Image Process object memories 3c, carry out the capable processing (step S13) of display unit capable extraction luminescence unit from being arranged in the bottom.Subsequently, judgement is arranged in capable whether being extracted in the capable extraction processing of luminescence unit of luminescence unit of bottom.Under sure estimate of situation, handle proceeding to step S15.Under the estimate of situation negating, handle proceeding to step S17 (step S14).At step S15, the length that the luminescence unit that is extracted is capable is compared with the horizontal length of viewing area in the plasma display panel 30.Subsequently, judge whether to exist horizontal length capable less than a luminescence unit of the horizontal length of viewing area on the plasma display panel 30.If judge to exist such luminescence unit capable, then handle proceeding to step S17.If judge not exist such luminescence unit capable, then processing finishes.At step S17, the number that opens circuit of column electrode increases by 1, and processing finishes then.
Like this, capable in processing shown in Figure 10, be extracted (the step S6) of the luminescence unit on top.If a luminescence unit is capable not to be extracted (being not among the step S7), the number that then opens circuit increases by 1 (step S10).The capable situation about not being extracted of luminescence unit does not have a situation about being illuminated like that shown in the image pattern 9D corresponding to the display unit on top is capable.One of the capable existence of display unit on this expression top is opened circuit.In this case, therefore, the number that opens circuit increases by 1.If the capable length of the luminescence unit that extracts is less than the horizontal length (" appearances " among the step S9) of viewing area on the plasma display panel 30, the number that then opens circuit increase by 1 (step S10).The situation that the capable length of the luminescence unit that extracts is interrupted corresponding to the capable such centre shown in Fig. 9 C of luminescence unit on top less than the situation of the horizontal length of viewing area.One of the capable existence of display unit on this expression top is opened circuit.In this case, the number that therefore opens circuit increases by 1.
And in processing shown in Figure 10, the luminescence unit of bottom is capable to be extracted (step S13).If a luminescence unit is capable not to be extracted (being not among the step S14), the number that then opens circuit increases by 1 (step S17).The capable situation about not being extracted of luminescence unit is corresponding to the capable situation about not being illuminated of display unit of bottom.One of the capable existence of display unit of this expression bottom is opened circuit.In this case, the number that opens circuit increases by 1.If the capable length of the luminescence unit that extracts is less than the horizontal length (" appearances " among the step S16) of viewing area on the plasma display panel 30, the number that then opens circuit increase by 1 (step S17).The situation that the capable length of the luminescence unit that extracts is interrupted corresponding to the capable such centre shown in Fig. 9 B or Fig. 9 D of luminescence unit of bottom less than the situation of the horizontal length of viewing area.One of the capable existence of display unit of this expression bottom is opened circuit.In this case, the number that opens circuit increases by 1.
For example, under the display mode situation shown in Fig. 9 A, the luminescence unit on top is capable to be extracted, and (being to be among the step S7) and the capable length of luminescence unit are not less than the horizontal length (" not occurring " among the step S9) of viewing area on the plasma display panel 30.In addition, the luminescence unit of bottom is capable to be extracted (among the step S14 for being), and the capable length of luminescence unit is not less than the horizontal length (" not occurring " among the step S16) of viewing area on the plasma display panel 30.In this case, find that display unit in top and bottom does not exist column electrode to open circuit in capable.Like this, the number of being counted in the processing shown in Figure 10 that opens circuit becomes 0.
Under the display mode situation shown in Fig. 9 B, the luminescence unit on top is capable to be extracted (being to be among the step S7) and the capable length of luminescence unit are not less than the horizontal length (" not occurring " among the step S9) of viewing area on the plasma display panel 30.In addition, the luminescence unit of bottom is capable to be extracted (among the step S14 for being), but the capable length of luminescence unit is less than the horizontal length (" appearance " among the step S16) of viewing area on the plasma display panel 30.In this case, finding that display unit on the top does not exist in capable opens circuit, but exists column electrode to open circuit in the display unit of bottom.Like this, the number of being counted in the processing shown in Figure 10 that opens circuit becomes 1.
For example, under the display mode situation shown in Fig. 9 C, the luminescence unit on top is capable to be extracted (among the step S7 for be) but the capable length of luminescence unit less than the horizontal length (" appearance " among the step S9) of viewing area on the plasma display panel 30.In addition, the luminescence unit of bottom is capable to be extracted (among the step S14 for being), but the capable length of luminescence unit is less than the horizontal length (" appearance " among the step S16) of viewing area on the plasma display panel 30.In this case, in the display unit of top and bottom is capable, all find to exist column electrode to open circuit.Like this, the number of being counted in the processing shown in Figure 10 that opens circuit becomes 2.
Under the display mode situation shown in Fig. 9 D, the luminescence unit on top is capable not to be extracted (being not among the step S7).In addition, the luminescence unit of bottom is capable to be extracted (among the step S14 for being), but the capable length of luminescence unit is less than the horizontal length (" appearance " among the step S16) of viewing area on the plasma display panel 30.In this case, in the display unit of top and bottom is capable, all find to exist to open circuit.Like this, the number of being counted in the processing shown in Figure 10 that opens circuit becomes 2.
In the demonstration method of inspection to display board according to present embodiment, employing is only illuminated the capable detecting pattern of display unit that is arranged in top, viewing area and bottom and is described in the above.As a result, thus might guarantee gray difference between those columns of display elements and the outer viewing area adjacent with those columns of display elements.Therefore, just might carry out the capable detection that whether exists electrode to open circuit of display unit reliably about being positioned at top and bottom.
In the above-described embodiments, described the advance situation of performing check of the single display unit that is positioned at top and bottom.Yet, the situation that this embodiment can also be applied on the top or a plurality of display units of bottom capable (for example two display units are capable) are checked simultaneously.In this case, can judge the capable number of display unit that luminous display unit is capable or existence is opened circuit according to the thickness of bright line.
(second embodiment)
As shown in Figure 4, plasma display panel 30 is set in the checking machine main body 1.In a columns of display elements of left end,, that is, in the viewing area of plasma display panel 30, have two columns of display elements and be used to luminous in a columns of display elements of right-hand member.Be clipped in center section between these two columns of display elements and be used to show blank screen (that is, make its not luminous).Carry out the demonstration of this pattern.Each pixel column comprises three adjacent columns of display elements, i.e. R, G, B columns of display elements.
Figure 11 A, 11B, 11C, 11D represent whether basis exists the various light-emitting modes that open circuit.Figure 11 A represents not exist situation about opening circuit, and each end in left end and right-hand member, has by three columns of display elements (R, G, B) bright line of Gou Chenging corresponding to a pixel column.In this case, always having 6 display units, to be listed in left end and right-hand member luminous and do not have the disappearance part.Pattern shown in Figure 11 A is exactly to be used to detect the detecting pattern that opens circuit.Figure 11 B is illustrated in and has situation about opening circuit in the columns of display elements (R) of right-hand member, and the columns of display elements (R) that is included in the bright line of right-hand member has been interrupted in the middle of it.Figure 11 C is illustrated in and has situation about opening circuit in the columns of display elements (R) of right-hand member, and the columns of display elements (R) that is included in the bright line of right-hand member is not luminous fully.Figure 11 D is illustrated in and has situation about opening circuit in the columns of display elements of right-hand member.In the situation of Figure 11 D, the center section that is included in the columns of display elements (R) in the bright line of right-hand member is not luminous, and columns of display elements (R) has been divided into two parts up and down.
The process flow diagram of performed processing when Figure 12 is illustrated in check.Processing shown in Figure 12 is to carry out according to the control that control device 4 carries out.
In the step S21 of Figure 12,, driving pulse shows above-mentioned detecting pattern thereby being provided for plasma display panel 30 by checking machine main body 1.As a result, plasma display panel 30 be illuminated into, for example, as Figure 11 A to the light-emitting mode shown in the 11D.And the value of the number that opens circuit is initialized to 0.Subsequently, the image of light-emitting mode is by ccd video camera 2 records (step S22).The view data of the image that is recorded is transferred into the Flame Image Process storer 3b of image processing apparatus 3 (step S23) from ccd video camera 2.Here, three kinds of color R, G, the data of B are separately to transmit.
Subsequently, in the view data of storing from Flame Image Process storer 3b, a zone that is included in a pixel column (three columns of display elements) of plasma display panel 30 left ends is set as Flame Image Process zone (step S24).This zone be set to comprise be arranged near the above-mentioned columns of display pixels and be positioned at the viewing area and non-luminous display unit (promptly, display unit in black viewing area) and be positioned at part outside the viewing area (that is, be positioned on the left of the columns of display elements part).Subsequently, the view data in preset regions is stored among the Flame Image Process object memories 3c (step S25).
Subsequently, according to the view data of storing among the Flame Image Process object memories 3c, carry out the processing (step S26) of extracting luminescence unit row (R) from the columns of display elements that is arranged in left end.Subsequently, judge whether the luminescence unit row (R) that are arranged in left end are extracted in the extraction processing to the luminescence unit row.Under sure estimate of situation, handle proceeding to step S28.Under the estimate of situation negating, handle proceeding to step S30 (step S27).At step S28, the length of the luminescence unit that is extracted row (R) is compared with the vertical length of viewing area in the plasma display panel 30.Subsequently, judge whether to exist the luminescence unit row (R) of vertical length less than the vertical length of viewing area on the plasma display panel 30.If judge to have such luminescence unit row (R), then handle proceeding to step S30.If judge not have such luminescence unit row (R), then handle proceeding to step S31 (step S29).At step S30, the number that opens circuit of row electrode increases by 1, handles proceeding to step S31.
At step S31, judge to be positioned at all three columns of display elements of pixel column of left end for formation to the processing of S30 at step S24 (whether R, G B) finish.Under the estimate of situation negating, handle turning back to step S24, wherein the processing of step S24 and step subsequently are repeated to carry out for next columns of display elements (for example G).If step S31 is judged as certainly, then handle proceeding to step S32.In that (R, G, columns of display elements step S24 B) handle proceeding to step S32 after the processing of S30 is performed for each color.
In the view data of from Flame Image Process storer 3b, storing, comprise that a zone of the pixel column (three columns of display elements) that is positioned at plasma display panel 30 right-hand members is set to Flame Image Process zone (step S32).This zone is set to comprise and is arranged near the above-mentioned columns of display pixels and is positioned at the viewing area and non-luminous display unit (that is the display unit in the black viewing area) and be positioned at part (that is, being positioned at the part on columns of display elements right side) outside the viewing area.Subsequently, the view data in the preset regions is stored among the Flame Image Process object memories 3c (step S33).
Subsequently, according to the view data that is stored among the Flame Image Process object memories 3c, carry out the processing (step S34) of extracting luminescence unit row (R) from the columns of display elements that is arranged in right-hand member.Subsequently, judging whether the luminescence unit row (R) be arranged in right-hand member are handled in the extraction of luminescence unit row is extracted.Under sure estimate of situation, handle proceeding to step S36.Under the estimate of situation negating, handle proceeding to step S38 (step S35).At step S36, the vertical length of viewing area is compared on the length of the luminescence unit that is extracted row (R) and the plasma display panel 30.Subsequently, judge whether to exist the luminescence unit row (R) of vertical length less than the vertical length of viewing area on the plasma display panel 30.If judge to have such luminescence unit row (R), then handle proceeding to step S38.If judge not have such luminescence unit row (R), then handle proceeding to step S39 (step S37).At step S38, the number that opens circuit of row electrode increases by 1, handles proceeding to step S39 then.
At step S39, judge to be positioned at all three columns of display elements of pixel column of right-hand member for formation to the processing of S38 at step S32 (whether R, G B) finish.Under the estimate of situation negating, handle turning back to step S32, wherein the processing of step S32 and step subsequently are repeated to carry out for next columns of display elements (for example G).If step S39 is judged as certainly, then processing finishes.For each color (R, G, columns of display elements step S24 B) are after the processing of S30 is performed, processing finishes.
As mentioned above, the luminescence unit of left end is listed in and is extracted (step S26) in the processing shown in Figure 12.If luminescence unit row are not extracted (being not among the step S27), the number that then opens circuit increases by 1 (step S30).The situation that the luminescence unit row are not extracted does not have the situation about being illuminated like that shown in the image pattern 11C corresponding to columns of display elements (columns of display elements that refers to right-hand member here).The columns of display elements of this expression left end exists one to open circuit.In this case, the number that opens circuit increases by 1.If the length of the luminescence unit that extracts row is less than the vertical length (" appearance " among the step S29) of viewing area on the plasma display panel 30, the number that then opens circuit increases by 1 (step S30).The length of the luminescence unit row that extract is listed as the situation that (the luminescence unit row that refer to right-hand member here) such centre shown in Figure 11 B and 11D is interrupted less than the situation of the vertical length of viewing area corresponding to luminescence unit.The columns of display elements of this expression left end exists one to open circuit.In this case, the number that opens circuit increases by 1.
And in processing shown in Figure 12, the luminescence unit of right-hand member row are extracted (step S34).If luminescence unit row are not extracted (being not among the step S35), the number that then opens circuit increases by 1 (step S38).The situation that the situation that luminescence unit row are not extracted is not illuminated corresponding to the columns of display elements of right-hand member.The columns of display elements of this expression right-hand member exists one to open circuit.In this case, the number that opens circuit increases by 1.If the length of the luminescence unit that extracts row is less than the vertical length (" appearance " among the step S37) of viewing area on the plasma display panel 30, the number that then opens circuit increases by 1 (step S38).Situation about being interrupted in the middle of the luminescence unit row of situation corresponding to right-hand member of the length of the luminescence unit row that extract less than the vertical length of viewing area.The columns of display elements of this expression right-hand member exists one to open circuit.In this case, the number that opens circuit increases by 1.
For example, under the light-emitting mode situation shown in Figure 11 A, three luminescence units of all of left end are listed as the vertical length (" not occurring " among the step S29) that the length that all is extracted (being to be among the step S27) and luminescence unit row is not less than viewing area on the plasma display panel 30.In addition, three luminescence units of all of right-hand member row all are extracted (among the step S35 for being), and the length that is listed as of luminescence unit is not less than the vertical length (" not occurring " among the step S37) of viewing area on the plasma display panel 30.In this case, find in the columns of display elements of left end and right-hand member that all the row electrode does not open circuit.Like this, the number of being counted in the processing shown in Figure 12 that opens circuit becomes 0.
Under the light-emitting mode situation shown in Figure 11 B, three luminescence units of all of left end are listed as the vertical length (" not occurring " among the step S29) that the length that all is extracted (being to be among the step S27) and luminescence unit row is not less than viewing area on the plasma display panel 30.In addition, three luminescence units of all of right-hand member row all are extracted (among the step S35 for being), but luminescence unit is listed as the vertical length (" appearance " in step S37) of the length of (R) less than viewing area on the plasma display panel 30 among them.In this case, find in the columns of display elements of left end, not open circuit, but in the columns of display elements (R) of right-hand member, find to exist the row electrode to open circuit.Like this, the number of being counted in the processing shown in Figure 12 that opens circuit becomes 1.
For example, under the light-emitting mode situation shown in Figure 11 C, three luminescence units of all of left end are listed as the vertical length (" not occurring " among the step S29) that the length that all is extracted (being to be among the step S27) and luminescence unit row is not less than viewing area on the plasma display panel 30.In addition, the luminescence unit row (R) in the luminescence unit of the right-hand member row are not extracted (being not among the step S35).For two other luminescence unit row (G and B) of right-hand member, be judged as being judged as " not occurring " among "Yes" and the step S37 among the step S35.In this case, find in the columns of display elements of left end, not open circuit, but in the columns of display elements (R) of right-hand member, find to exist the row electrode to open circuit.Like this, the number of being counted in the processing shown in Figure 12 that opens circuit becomes 1.
Under the light-emitting mode situation shown in Figure 11 D, three luminescence units of all of left end row all are extracted (among the step S27 for being), and the length of luminescence unit row is not less than the vertical length (being " not occurring " among the step S29) of viewing area on the plasma display panel 30.In addition, three luminescence units of all of right-hand member row all are extracted (among the step S35 for being), but luminescence unit is listed as the vertical length (" appearance " in step S37) of the length of (R) less than viewing area on the plasma display panel 30.In this case, find in the columns of display elements of left end, not open circuit, but in the columns of display elements (R) of right-hand member, find to exist to open circuit.Like this, the number of being counted in the processing shown in Figure 12 that opens circuit becomes 1.
In the demonstration method of inspection, adopt the detecting pattern that only illuminates the columns of display elements that is arranged in viewing area left end and right-hand member to advance to be listed as description in the above to display board according to present embodiment.As a result, thus might guarantee gray difference between those columns of display elements and the outer viewing area adjacent with those columns of display elements.Therefore, just might carry out the detection that whether exists electrode to open circuit for the columns of display elements that is positioned at left end and right-hand member reliably.
In the above-described embodiments, described formation has been positioned at the situation that a plurality of columns of display elements (three columns of display elements) of a pixel column of left end or right-hand member are tested.Yet this embodiment can also be applied to, and for example monochromatic display board is verified and is positioned at a situation that columns of display elements is verified of left end or right-hand member.
(the 3rd embodiment)
As shown in figure 13, provide the address driver 11a and the 11b that link to each other with the electrode of plasma display panel 31 in checking machine main body 1, X keeps driver 12a and 12b, and Y keeps driver 13a and 13b.
As shown in figure 13, plasma display panel 31 is divided equally is two parts up and down, and the electrode of various piece also is separated from each other.As shown in figure 13, the top of plasma display panel 31 comprises row electrode D1r, D1g, D1b, D2r, D2g, D2b...Dmr, Dmg and Dmb, column electrode X1 to Xi and column electrode Y1 to Yi.Row electrode D1r is connected to address driver 11a to Dmb.Column electrode X1 is connected to X to Xi and keeps driver 12a.Column electrode Y1 is connected to Y to Yi and keeps driver 13a.
The lower part of plasma display panel 31 comprises row electrode DA1r, DA1g, DA1b, DA2r, DA2g, DA2b...DAmr, DAmg and DAmb, column electrode Xi+1 to Xn and column electrode Yi+1 to Yn.Row electrode DA1r is connected to address driver 11b to DAmb.Column electrode Xi+1 is connected to X to Xn and keeps driver 12b.Column electrode Yi+1 is connected to Y to Yn and keeps driver 13b.
As shown in figure 13, the row electrode is assigned to repeatedly and the R unit with described order, and G unit and B unit are associated.In viewing area 41, R unit, G unit and B unit are respectively formed at the row electrode and column electrode X1 locates to the point of crossing of Yn to Xn and column electrode Y1.As shown in figure 13, the R unit of continuous configuration, G unit and B unit are treated to a group, and this group has formed a pixel.Viewing area part 47 outside outside viewing area 41, providing.
As shown in figure 13, thus column electrode X1 is alternately arranged them to extend from relative mutually side to Xn and column electrode Y1 to Yn with the form of pectination.It is capable that in the Yn one of column electrode X1 in the Xn and column electrode Y1 is dispensed on a display unit.In a unit, thereby arranged abreast to Yn to Xn and column electrode Y1 can be toward each other for column electrode X1.
41 the center section in the viewing area, row electrode D1r is separated to DAmb in vertical direction to Dmb and row electrode DA1r.Below will further specify the arrangement of row electrode.
Below will illustrate and utilize the step of verifying attachment 100 execution under the situation of check short circuit between the row electrode of plasma display panel 31.
As shown in Figure 4, when check plasma display panel 31 be set in the checking machine main body 1, make in the top of viewing area 41 of plasma display panel 31 and the lower part one all emission monochromatic light (for example, R look).At this moment, make another part all show blank screen (that is, make its not luminous).
Figure 14 A, 14B and 14C represent according to the light-emitting mode that whether has short circuit between the row electrode.Figure 14 A is illustrated in the situation when not having short circuit between the row electrode, and makes the top 42 of viewing area 41 launch monochromatic light as a whole.At this moment, in lower part 43, there is not luminescence unit.Pattern shown in Figure 14 A is exactly the detecting pattern that is used to detect the short circuit between the row electrode.Figure 14 B is illustrated in the light-emitting mode under the situation that has short circuit between the row electrode.Figure 14 C is illustrated in the diagrammatic sketch of the short circuit part between the row electrode.Short circuit part 103 between the row electrode in the one row electrode of the row electrode group 101 in top and the row electrode group 102 of lower part is illustrated in Figure 14 C.If have such short circuit between the row electrode, then row electrode in the top 42 and the row electrode in the lower part 43 are interconnected by this short circuit part 103.Unit on a line (bright line) 104 of the middle row electrode of the row electrode group 102 that links to each other with row electrode in the row electrode group 101 is luminous.As a result, just might detect short circuit between the row electrode.
Such light-emitting mode in plasma display panel 31 is by ccd video camera 2 records.Image processing apparatus 3 is analyzed light-emitting mode according to the view data that ccd video camera 2 provides.
Figure 15 is the process flow diagram that is illustrated in processing performed when checking.Processing shown in Figure 15 is to carry out according to the control that control device 4 carries out.
In the step S41 of Figure 15,, driving pulse shows above-mentioned detecting pattern thereby being provided for plasma display panel 31 by checking machine main body 1.As a result, plasma display panel 31 be illuminated into, for example, the light-emitting mode shown in Figure 14 A or 14B.Indicate whether to exist an ident value of location of short circuit to be initialized to the value that " there is not location of short circuit in indication ".Subsequently, the image of light-emitting mode is by ccd video camera 2 records (step S42).The view data of the image that is recorded is transferred into the Flame Image Process storer 3b of image processing apparatus 3 (step S43) from ccd video camera 2.Here, three kinds of color R, G, the data of B are sent to independent storage area.
Subsequently, set a storage area, wherein store the glow color (R, G or B) that becomes the Flame Image Process object, promptly become the data (step S44) of Flame Image Process object.Subsequently, according to the view data of storing among the Flame Image Process storer 3b, calculate a near linear (step S45) that is similar to central cut-off rule.
Subsequently, in the view data of in Flame Image Process storer 3b, storing, will not make its luminous top or lower part all be made as Flame Image Process zone (step S46).Here, the Flame Image Process zone can be set as a reference by the near linear that the processing of step S45 is calculated.For example, if detecting pattern is exactly the pattern shown in Figure 14 A, comprise in step S46 that then the zone of whole lower part 43 and central cut-off rule all is set as the Flame Image Process zone.
Subsequently, according to the view data of storing among the Flame Image Process object memories 3c, carry out the processing (step S47) of from the Flame Image Process zone, extracting luminous point or isolychn.Here, extract luminous point or isolychn for the glow color that is provided with among the step S44.For example, under the light-emitting mode situation shown in Figure 14 B, on bright line 104, extract luminous point or isolychn.Under the light-emitting mode situation shown in Figure 14 A, do not extract luminous point or isolychn.
Subsequently, judge in step S48 whether luminous point or isolychn are extracted in the processing of step S47.Under sure estimate of situation, handle proceeding to step S49.Under the estimate of situation negating, handle proceeding to step S50.At step S49, judge between the row electrode to have short circuit, and indicate whether to exist a value of statistical indicant of location of short circuit to be set to indicate the value that " there is location of short circuit here in relevant glow color ".Then, processing proceeds to step S51 from step S49.On the other hand,, judge between the row electrode not have short circuit, and indicate whether to exist this value of statistical indicant of location of short circuit not change about relevant glow color at step S50.Then, processing proceeds to step S51 from step S50.
At step S51, whether processing that judgement will be carried out in step S41 and step subsequently be about all R, and G and B glow color all finish.Under the estimate of situation negating, handle and turn back to step S41 to carry out processing to next glow color (for example, G color).Under sure estimate of situation, processing as shown in figure 15 finishes.After step S41 had carried out each glow color (R, G and B) to the processing of S50, all processing finished.
About each glow color R, G and B, to the detection that whether has short circuit between the row electrode by above-mentioned processing execution.For each glow color (R, G and B), can judge whether there is short circuit between the row electrode according to sign.
In the demonstration method of inspection to display board according to present embodiment, make by divide in vertical direction have only in top that display board forms and the lower part one luminous, and the luminescence unit in another of top and lower part is extracted.Thereby the short circuit between the row electrode can be detected reliably.
In the above-described embodiments, show an example of the colored display board that detects unit cell arrangement with three kinds of glow colors.Yet the demonstration method of inspection to display board according to the present invention also can be applied to arranging the detection of the monochromatic display board of monochrome cells.In this case, make the unit in one of them part luminous, about whether having luminescence unit in the other parts carry out and detect.
(the 4th embodiment)
Below will illustrate and utilize verifying attachment 100 to carry out in the step under the situation of the check of short circuit whether between the column electrode of plasma display panel 30.Divided equally for the check of two-part plasma display panel 31 up and down and also can be carried out in the same manner.
As shown in Figure 4, plasma display panel 30 is set in the checking machine main body 1.Light-emitting mode with sawtooth lattice type is presented in the viewing area of plasma display panel 30.Figure 16 A shows the light-emitting mode under the situation that does not have short circuit between the column electrode.In Figure 16 A, be designated " R ", " G ", the zone of " B " is represented red respectively, and is green, the blue-light-emitting unit.The non-luminous unit of other region representation.Pattern shown in Figure 16 A is exactly the detecting pattern that is used to detect the short circuit between the column electrode.In plasma display panel 30, the R that on line direction, arranges, G, the display unit of B color forms a pixel, as mentioned above.Shown in Figure 16 B, the sawtooth lattice pattern formula of Hei-Bai is displayed on the whole viewing area 30a.
Figure 17 A is illustrated in the light-emitting mode that exists between the column electrode under the short-circuit conditions to 17C.Figure 17 A is illustrated in an example of the black line 111 (concealed wire) that occurs among the 30a of viewing area on the line direction.Shown in Figure 17 B, comprise that two display lines of display unit that originally should be luminous do not have luminous in the part of black line 111.
Figure 17 C is illustrated in the synoptic diagram of the short circuit part between the column electrode.Shown in Figure 17 C, between column electrode Yi and column electrode Xi+1, there is a short circuit, thereby makes these two electrodes be associated with adjacent display unit respectively by short circuit part 112.If this short circuit that causes by short circuit part 112 occurred, then be included in corresponding to the display unit on two lines of the column electrode of short circuit each other not luminous.This has caused having the light-emitting mode of a black line, shown in Figure 17 A and 17B.
The process flow diagram of performed processing when Figure 18 is illustrated in check.Processing shown in Figure 180 is to carry out according to the control of being undertaken by control device 4.
In the step S61 of Figure 18,, driving pulse shows detecting pattern shown in Figure 16 thereby being provided for plasma display panel 30 by checking machine main body 1.As a result, plasma display panel 30 be illuminated into, for example, the light-emitting mode shown in Figure 16 A and 16B or Figure 17 A and 17B.Subsequently, the image of light-emitting mode is by ccd video camera 2 records (step S62).The view data of the image that is recorded is transferred into the Flame Image Process storer 3b of image processing apparatus 3 (step S63) from ccd video camera 2.Here, three kinds of color R, G, the data of B are separately to transmit.
Subsequently, in the view data of in Flame Image Process storer 3b, storing, whole viewing area 30a on the plasma display panel 30 is set to the Flame Image Process zone, and the view data in the zone of She Zhiing is stored among the Flame Image Process object memories 3c (step S64) thus.
Subsequently, according to the view data of storing among the Flame Image Process object memories 3c, carry out the processing (step S65) of extracting the black line among the 30a of viewing area.Subsequently, judge the black line that carries out extracts in the processing whether extracted black line (step S66) from the 30a of viewing area in step S65.Under sure estimate of situation, carry out the display result (step S67) that has short circuit between the column electrode.Under the estimate of situation negating, carry out the display result (step S68) that does not have short circuit between the column electrode.No matter which kind of situation, the processing among Figure 18 all finishes.
If at step S65, this light-emitting mode is exactly the detecting pattern shown in Figure 16 A and Figure 16 B, then black line can not occur.Since in this case step S66 judge whether surely, then determine not have short circuit between the column electrode.Under the situation of the light-emitting mode shown in Figure 17 A and Figure 17 B, extract a black line.Because the judgement of step S66 is sure in this case, then determine to have short circuit between the column electrode.
Therefore, in processing shown in Figure 180, make plasma display panel 30 show the test mode of sawtooth lattice type.If there is short circuit in this case between the column electrode, a black line then appears on the Dui Ying line.Therefore in the present embodiment, carry out black line and extract processing (step S65).If extract black line, then judge to have short circuit between the column electrode.If do not extract black line, then judge do not exist between the column electrode short circuit (step S66, S68).Thereby, can reliable detection go out whether there is short circuit between the column electrode.
In the above-described embodiments, described and had three kinds of glow color R, G, the colored display board of B.Yet under the situation of monochromatic display board, monochromatic sawtooth lattice pattern formula also can be used as detecting pattern.
In first to the 4th embodiment, for example understand the check of plasma display panel.According to the display board that also can be widely used in other to the demonstration method of inspection of display board of the present invention.
The present invention can other concrete form embodies and does not depart from spirit of the present invention or essential characteristic.Therefore embodiments of the invention all are counted as illustrative but not determinate in all fields, by claims rather than the scope of the present invention pointed out by aforementioned specification, and fall into the meaning of equivalence of claims and all changes in the scope all are intended to wherein involved.

Claims (14)

1. demonstration method of inspection that is used for display board, be used for checking the line fault of display board, this display board comprises a plurality of column electrodes and a plurality of row electrodes to arrange perpendicular to the direction of column electrode, to form display unit at column electrode and row electrode crossings place, this display board is display image by the light emission of controlling the display unit of arranging with matrix form in the viewing area, and this demonstration method of inspection comprises following processing:
Make the display unit that is arranged in top, viewing area or bottom capable luminous;
Utilize imageing sensor to detect luminous display unit, be arranged near the luminescence display unit and be positioned at viewing area and non-luminous display unit, and be positioned at the part outside the viewing area, and export a vision signal;
According to the vision signal of output, detect number and length corresponding to the capable bright line on line direction of the luminescence unit that is positioned at top or bottom; And
When the number of bright line and length during, judge corresponding to occurring opening circuit in the capable column electrode of display unit less than predetermined value.
2. according to the demonstration method of inspection that is used for display board of claim 1, wherein make the display unit that is positioned at the top capable capable simultaneously luminous with the display unit that is positioned at the bottom.
3. demonstration method of inspection that is used for display board, be used for checking the line fault of display board, this display board comprises a plurality of column electrodes and a plurality of row electrodes to arrange perpendicular to the direction of column electrode, to form display unit at column electrode and row electrode crossings place, this display board is display image by the light emission of controlling the display unit of arranging with matrix form in the viewing area, and this demonstration method of inspection comprises following processing:
Make the columns of display elements that is arranged in viewing area left end or right-hand member luminous;
Utilize imageing sensor to detect luminous display unit, be arranged near the luminescence display unit and be positioned at viewing area and non-luminous display unit, and be positioned at the part outside the viewing area, and export a vision signal;
According to the vision signal of output, detect number and length corresponding to the bright line on column direction of the luminescence unit row that are positioned at left end or right-hand member; And
When the number of bright line and length during, judge in the row electrode corresponding to columns of display elements to occur opening circuit less than predetermined value.
4. demonstration method of inspection that is used for display board, be used for checking the line fault of display board, this display board comprises a plurality of column electrodes and a plurality of row electrodes to arrange perpendicular to the direction of column electrode, to form display unit at column electrode and row electrode crossings place, thereby display unit is arranged their glow color on line direction be three kinds of colors and differ from one another, and form a pixel, the display unit that its glow color is identical is arranged on the column direction, this display board is display image by the light emission of controlling the display unit of arranging with matrix form in the viewing area, and this demonstration method of inspection comprises following processing:
Make the columns of display elements that is arranged in viewing area left end or right-hand member luminous;
Utilize imageing sensor to detect luminous display unit, be arranged near the luminescence display unit and be positioned at viewing area and non-luminous display unit, and be positioned at the part outside the viewing area, and export a vision signal; And
According to the vision signal of output, detect number and length corresponding to the bright line on column direction of the luminescence unit row that are positioned at left end or right-hand member;
When the number of bright line and length during, judge in the row electrode corresponding to columns of display elements to occur opening circuit less than predetermined value.
5. demonstration method of inspection that is used for display board, be used to check the line fault between the row electrode of dividing on the display board, this display board comprises a plurality of column electrodes and a plurality of row electrodes to arrange perpendicular to the direction of column electrode, to form display unit at column electrode and row electrode crossings place, above-mentioned row electrode is divided with column direction in the viewing area, when with a behavior unit, form display board so that may side by side select display unit in the screen that separates that obtains by division, this demonstration method of inspection comprises following processing:
Make an emission monochromatic light in the screen that the upper and lower that obtains by division separates;
Utilize imageing sensor to detect and separate in the screen another, and export a vision signal as non-luminous separately upper and lower of screen;
According to the vision signal of output, detect the bright line on column direction of the columns of display elements in the screen that separates corresponding to the upper and lower another; And
Judgement electric pole short circuit occurs between the column electrode that separates corresponding to the columns of display elements that detects bright line thereon.
6. demonstration method of inspection that is used for display board, be used to check the line fault between the row electrode of dividing on the display board, this display board comprises a plurality of column electrodes and a plurality of row electrodes to arrange perpendicular to the direction of column electrode, to form display unit at column electrode and row electrode crossings place, thereby display unit is arranged their glow color on line direction be three kinds of colors and differ from one another, and form a pixel, the display unit that its glow color is identical is arranged on the column direction, above-mentioned row electrode is divided with column direction in the viewing area, when with a behavior unit, form display board so that may side by side select display unit in the screen that separates that obtains by division, this demonstration method of inspection comprises following processing:
Make an emission monochromatic light in the screen that the upper and lower that obtains by division separates;
Utilize imageing sensor to detect and separate in the screen another, and export a vision signal as non-luminous separately upper and lower of screen;
According to the vision signal of output, detect the bright line on column direction that separates the columns of display elements in the screen another corresponding to the upper and lower; And
Judge between the column electrode that separates of the corresponding columns of display elements that detects bright line thereon and electric pole short circuit occurs.
7. demonstration method of inspection that is used for display board, be used for checking the line fault of display board, this display board comprises a plurality of column electrodes and a plurality of row electrodes to arrange perpendicular to the direction of column electrode, to form display unit at column electrode and row electrode crossings place, this display board is display image by the light emission of controlling the display unit of arranging with matrix form in the viewing area, and this demonstration method of inspection comprises following processing:
Make the display unit in the viewing area luminous with sawtooth lattice shape;
Utilize the display unit in the imageing sensor detection viewing area, and export a vision signal;
According to the concealed wire on the video signal detection line direction of output; And
Judgement detects thereon between the capable column electrode of the display unit of concealed wire in correspondence and electric pole short circuit occurs.
8. demonstration verifying attachment that is used for display board, be used for checking the line fault of display board, this display board comprises a plurality of column electrodes and a plurality of row electrodes to arrange perpendicular to the direction of column electrode, to form display unit at column electrode and row electrode crossings place, this display board is display image by the light emission of controlling the display unit of arranging with matrix form in the viewing area, and this demonstration verifying attachment comprises:
Light-emitting device is used to make the display unit that is positioned at top, viewing area or bottom capable luminous;
Imageing sensor is used to detect luminous display unit, is arranged near the luminescence display unit and is positioned at viewing area and non-luminous display unit, and be positioned at the part outside the viewing area, and export a vision signal; With
Judgment means is used for detecting number and length corresponding to the capable bright line on line direction of the luminescence unit that is positioned at top or bottom according to the vision signal from described imageing sensor output; When the number of bright line and length during, judge in the column electrode capable, to occur opening circuit corresponding to display unit less than predetermined value.
9. the demonstration verifying attachment that is used for display board according to Claim 8 wherein makes the display unit that is positioned at the top capable capable simultaneously luminous with the display unit that is positioned at the bottom.
10. demonstration verifying attachment that is used for display board, be used for checking the line fault of display board, this display board comprises a plurality of column electrodes and a plurality of row electrodes to arrange perpendicular to the direction of column electrode, to form display unit at column electrode and row electrode crossings place, this display board is display image by the light emission of controlling the display unit of arranging with matrix form in the viewing area, and this demonstration verifying attachment comprises:
Light-emitting device is used for making the columns of display elements that is positioned at viewing area left end or right-hand member luminous;
Imageing sensor is used to utilize imageing sensor to detect luminous display unit, is arranged near the luminescence display unit and is positioned at viewing area and non-luminous display unit, and be positioned at the part outside the viewing area, and export a vision signal; With
Judgment means is used for the vision signal according to output, detects number and length corresponding to the bright line on column direction of the luminescence unit row that are positioned at left end or right-hand member; When the number of bright line and length during, judge in the row electrode corresponding to columns of display elements to occur opening circuit less than predetermined value.
11. demonstration verifying attachment that is used for display board, be used for checking the line fault of display board, this display board comprises a plurality of column electrodes and a plurality of row electrodes to arrange perpendicular to the direction of column electrode, to form display unit at column electrode and row electrode crossings place, thereby display unit is arranged their glow color on line direction be three kinds of colors and differ from one another, and form a pixel, the display unit that its glow color is identical is arranged on the column direction, this display board is display image by the light emission of controlling the display unit of arranging with matrix form in the viewing area, and this demonstration verifying attachment comprises:
Light-emitting device is used for making the columns of display elements that is positioned at viewing area left end or right-hand member luminous;
Imageing sensor is used to utilize imageing sensor to detect luminous display unit, is arranged near the luminescence display unit and is positioned at viewing area and non-luminous display unit, and be positioned at the part outside the viewing area, and export a vision signal; With
Judgment means is used for the vision signal according to output, detects number and length corresponding to the bright line on column direction of the luminescence unit row that are positioned at left end or right-hand member; When the number of bright line and length during, judge in the row electrode corresponding to columns of display elements to occur opening circuit less than predetermined value.
12. demonstration verifying attachment that is used for display board, be used to check the line fault between the row electrode of dividing on the display board, this display board comprises a plurality of column electrodes and a plurality of row electrodes to arrange perpendicular to the direction of column electrode, to form display unit at column electrode and row electrode crossings place, above-mentioned row electrode is divided with column direction in the viewing area, when with a behavior unit, form display board so that may side by side select display unit in the screen that separates that obtains by division, this demonstration verifying attachment comprises:
Light-emitting device is used for making an emission monochromatic light of the screen that the upper and lower that obtains by division separates;
Imageing sensor is used for utilizing imageing sensor to detect as non-luminous separately upper and lower of screen and separates another of screen, and exports a vision signal;
Judgment means is used for the vision signal according to output, detects the bright line on column direction that separates the columns of display elements in the screen another corresponding to the upper and lower; Judge between the column electrode that separates of the corresponding columns of display elements that detects bright line thereon and electric pole short circuit occurs.
13. demonstration verifying attachment that is used for display board, be used for checking the line fault of display board between the row electrode of dividing, this display board comprises a plurality of column electrodes and a plurality of row electrodes to arrange perpendicular to the direction of column electrode, to form display unit at column electrode and row electrode crossings place, thereby display unit is arranged their glow color on line direction be three kinds of colors and differ from one another, and form a pixel, the display unit that its glow color is identical is arranged on the column direction, above-mentioned row electrode is divided with column direction in the viewing area, when with a behavior unit, form display board so that may side by side select display unit in the screen that separates that obtains by division, this demonstration verifying attachment comprises:
Light-emitting device is used for making an emission monochromatic light of the screen that the upper and lower that obtains by division separates;
Imageing sensor is used for utilizing imageing sensor to detect as non-luminous separately upper and lower of screen and separates another of screen, and exports a vision signal;
Judgment means is used for the vision signal according to output, detects the bright line on column direction that separates the columns of display elements in the screen another corresponding to the upper and lower; And judge between the column electrode that separates of the corresponding columns of display elements that detects bright line thereon and electric pole short circuit occurs.
14. demonstration verifying attachment that is used for display board, be used for checking the line fault of display board, this display board comprises a plurality of column electrodes and a plurality of row electrodes to arrange perpendicular to the direction of column electrode, to form display unit at column electrode and row electrode crossings place, this display board is display image by the light emission of controlling the display unit of arranging with matrix form in the viewing area, and this demonstration verifying attachment comprises:
Light-emitting device is used for making the display unit of viewing area luminous with sawtooth lattice shape;
Imageing sensor is used for utilizing imageing sensor to detect the display unit of viewing area, and exports a vision signal;
Judgment means is used for according to the concealed wire on the video signal detection line direction of output, and judges to detect thereon between the capable column electrode of the display unit of concealed wire in correspondence and electric pole short circuit occurs.
CNA031328954A 2002-07-25 2003-07-25 Display checking method and apparatus for display panel Pending CN1494047A (en)

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JP2002224511A JP2004069307A (en) 2002-08-01 2002-08-01 Display inspection method and display inspection device for display panel
JP2002224512A JP2004069308A (en) 2002-08-01 2002-08-01 Display inspection method and display inspection device for display panel
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CN101719352B (en) * 2008-10-09 2012-07-25 北京京东方光电科技有限公司 Device and method for detection after forming liquid crystal box
CN105551411A (en) * 2016-02-22 2016-05-04 京东方科技集团股份有限公司 Analysis method for short-circuit point
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CN100550101C (en) * 2005-07-07 2009-10-14 东北先锋公司 The drive unit of light emitting display and driving method
CN101297338B (en) * 2005-09-21 2011-05-04 富士通天株式会社 Display, its inspecting method, its manufacturing method, display panel inspecting method, and display panel manufacturing method
CN1982857B (en) * 2005-12-14 2011-06-29 深圳迈瑞生物医疗电子股份有限公司 Method for automatically measuring luminescent device
CN101566739B (en) * 2008-04-25 2011-07-20 北京京东方光电科技有限公司 System and method for maintaining array circuit
CN101719352B (en) * 2008-10-09 2012-07-25 北京京东方光电科技有限公司 Device and method for detection after forming liquid crystal box
US8525540B2 (en) 2008-10-09 2013-09-03 Beijing Boe Optoelectronics Technology Co., Ltd. Switch control unit, test apparatus and method for liquid crystal cell
US9389245B2 (en) 2008-10-09 2016-07-12 Beijing Boe Optoelectronics Technology Co., Ltd. Switch control unit, test apparatus and method for liquid crystal cell
CN105551411A (en) * 2016-02-22 2016-05-04 京东方科技集团股份有限公司 Analysis method for short-circuit point
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CN107179123A (en) * 2017-04-21 2017-09-19 华南理工大学 Brightness demarcation and measuring method that camera is merged with LED

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