CN204613338U - Pick-up unit - Google Patents
Pick-up unit Download PDFInfo
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- CN204613338U CN204613338U CN201520175551.1U CN201520175551U CN204613338U CN 204613338 U CN204613338 U CN 204613338U CN 201520175551 U CN201520175551 U CN 201520175551U CN 204613338 U CN204613338 U CN 204613338U
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Abstract
The utility model discloses a kind of pick-up unit, belong to electric circuit inspection technical field.This pick-up unit, comprising: electro-optic conversion shields, and is placed in the side of circuit board to be detected, for showing check pattern; Power panel, is placed in the opposite side of described circuit board to be detected, for providing voltage for described electro-optic conversion screen and circuit board.By applying voltage between the conductive layer that shields at described electro-optic conversion and described power panel, described electro-optic conversion screen display shows the check pattern of described circuit board.By check pattern can accurately, circuit abnormal conditions of through hole and surface circuit in decision circuitry plate intuitively.
Description
Technical field
The utility model relates to a kind of detection technique field, especially relates to a kind of pick-up unit.
Background technology
At present, electronic product pursues miniaturization, product mass, the production automation, and SMT (Surface Mounted Technology, surface mounting technology) becomes most popular a kind of packaged type in Electronic Assemblies industry gradually.As the vitals in SMT technique, the detection of carrying the electric property of the substrate of chip component is the difficult point in Substrate manufacture field always.Main cause is: the invisibility of through hole circuit and high density, is difficult to detect that whether conduction property is good fast and intuitively; Line pattern spacing is little not easily differentiates whether short circuit, and pattern density high detection efficiency is low.
In prior art, traditional microscopic examination and ohmmeter detect and all cannot meet production line balance.For the detection of circuit substrate electric property, generally use flying probe tester in the industry.Flying probe tester does not rely on the pin pattern be arranged on fixture or support.Based on this system, two or more probe is installed on the small magnetic head that can move freely on the x-y plane, and test point is directly controlled by CADI Gerber data.Two probe can move in the scope of 4mil apart.Probe can move independently, and does not have their degree close to each other of real restriction.Tester with two arms that can move around is basic with being measured as of electric capacity.Circuit board be pressed against on the insulation course be placed on one piece of sheet metal, as another sheet metal of capacitor.If there is a short circuit between circuit, electric capacity is by than large on the point determined at.If there is an open circuit, electric capacity will diminish.Flying probe tester once only can test two or four test point.For the circuit substrate that number of vias is huge, the flying probe test technology of movement is slow, causes testing industrial beat low.
Utility model content
In view of this, the utility model exists above-mentioned for available circuit plate detection technique or other is not enough, the utility model provides a kind of pick-up unit, it utilizes electro-optic conversion to shield electrooptical effect can efficient testing circuit plate intuitively, has the advantage that detection method is simple, accuracy of detection is high, cost is low.
In order to reach above-mentioned or other object, the utility model proposes a kind of pick-up unit, on the one hand for testing circuit plate, described circuit board has both sides, and described both sides are furnished with circuit pattern, comprising: electro-optic conversion shields, be placed in the side of described circuit board, for showing check pattern; Power panel, is placed in the opposite side of described circuit board, for providing voltage for described electro-optic conversion screen and circuit board.
As an improvement of pick-up unit, described electro-optic conversion screen also comprises upper substrate, infrabasal plate and is located in the electro-optic conversion medium between described upper and lower substrate, and described upper substrate is provided with conductive layer near described electro-optic conversion medium side.
As an improvement of pick-up unit, described electro-optic conversion medium, under different voltage statuss or different current status, can show the combination of different brightness or different colors or different brightness and different colours.
As an improvement of pick-up unit, described electro-optic conversion medium comprises charged black particles and white charged particles is distributed in coloring solution or clear solution.
As an improvement of pick-up unit, the power electrode that described power panel also comprises base plate and is arranged on described base plate.
In order to reach above-mentioned or other object, the utility model proposes a kind of pick-up unit, on the other hand for testing circuit plate, described circuit board has both sides, and described both sides are furnished with circuit pattern, comprising: Electronic Paper, be placed in a side surface of described circuit board, for showing check pattern; Power panel, is placed in the opposite side surface of described circuit board, has base plate and be arranged at the power electrode on described base plate, for providing voltage for described Electronic Paper.
As an improvement of pick-up unit, described circuit board has both sides, multiple upper surface line unit is furnished with near Electronic Paper side, be furnished with multiple lower surface line unit near power panel side, between described upper surface line unit and described lower surface line unit, realize electrical connection by through hole.
As an improvement of pick-up unit, described multiple upper surface line unit is array distribution, described in each, upper surface line unit comprises: the first line pattern of odd-numbered line and the second line pattern of even number line, and insulate between described first line pattern and described second line pattern and separate.
As an improvement of pick-up unit, described multiple lower surface line unit is array distribution, described in each, lower surface line unit comprises: the 4th line pattern of odd-numbered line and the 5th line pattern of even number line, and described 4th line pattern and described 5th line pattern are separated by derby.
As an improvement of pick-up unit, described first line pattern is connected by through hole electricity with described 4th line pattern; Described second line pattern is connected by through hole electricity by the 5th line pattern.
As an improvement of pick-up unit, described power electrode is divided into two groups, and one group is corresponding with described 4th line pattern, and another group is corresponding with described 5th line pattern.
As an improvement of pick-up unit, described power electrode is corresponding with one of described 4th line pattern or described 5th line pattern.
The utility model
In order to reach above-mentioned or other object, the utility model provides a kind of pick-up unit more on the one hand, for testing circuit plate, described circuit board has both sides, side is furnished with multiple in the odd-numbered line first line pattern of array distribution and the second line pattern of even number line, opposite side is furnished with multiple in odd-numbered line the 4th line pattern of array distribution and the 5th line pattern of even number line, realize being electrically connected respectively by through hole between described first, fourth line pattern with described second, five line patterns, comprising:
Electro-optic conversion screen is placed in the side of described circuit board, and described electro-optic conversion screen comprises upper substrate, infrabasal plate and is located in the electro-optic conversion medium between described upper and lower substrate, and described upper substrate is provided with conductive layer near described electro-optic conversion medium side;
Power panel is placed in the opposite side of described circuit board, and described power panel has multiple power electrode, and described multiple power electrode is respectively with described multiple first line pattern or multiple 4th line pattern is corresponding is electrically connected;
By applying between the conductive layer that shields at described electro-optic conversion and described power electrode to detect voltage, described detection voltage is transferred to described first line pattern, described through hole, described 4th line pattern or described 4th line pattern, described through hole, described first line pattern by described power electrode successively, realizes the check pattern that described electro-optic conversion screen display shows described circuit board.
In order to reach above-mentioned or other object, the another aspect of the utility model provides a kind of pick-up unit, for testing circuit plate, described circuit board has both sides, side is furnished with multiple in the odd-numbered line first line pattern of array distribution and the second line pattern of even number line, opposite side is furnished with multiple in odd-numbered line the 4th line pattern of array distribution and the 5th line pattern of even number line, realize being electrically connected respectively by through hole between described first, fourth line pattern with described second, five line patterns, comprising:
Electro-optic conversion screen is placed in the side of described circuit board, and described electro-optic conversion screen comprises upper substrate, infrabasal plate and is located in the electro-optic conversion medium between described upper and lower substrate, and described upper substrate is provided with conductive layer near described electro-optic conversion medium side;
Power panel is placed in the opposite side of described circuit board, and described power panel has multiple power electrode, and described multiple power electrode is respectively with described multiple second line pattern or multiple 5th line pattern is corresponding is electrically connected;
By applying between the conductive layer that shields at described electro-optic conversion and described power electrode to detect voltage, described detection voltage is transferred to described second line pattern, described through hole, described 5th line pattern or described 5th line pattern, described through hole, described second line pattern by described power electrode successively, realizes the check pattern that described electro-optic conversion screen display shows described circuit board.
Compared with prior art, the utility model has the following advantages:
The utility model is by providing voltage to circuit board to be detected, electro-optic conversion medium generation brightness change during electro-optic conversion is shielded or color change, thus go out circuit electric characteristic in electro-optic conversion screen display, finally can accurately, the short circuit of decision circuitry intuitively and open circuit conditions.Can reduce detection voltage, intensifier reliability and permanance, improve detection efficiency, what increase electro-optic conversion screen can the pick-up unit for electric circuit inspection of range of application.
Accompanying drawing explanation
Describe embodiment in detail by reference to accompanying drawing, above-mentioned and other objects, features and advantages of the present utility model can become apparent, in the accompanying drawings:
Fig. 1 is the section rough schematic view schematically showing the utility model pick-up unit;
Fig. 2 is the diagrammatic cross-section of the pick-up unit schematically showing the utility model one specific embodiment;
Fig. 3 is the concrete structure schematic diagram schematically showing microcapsules in Fig. 2;
Fig. 4 A is the schematic perspective view schematically showing the utility model circuit board to be tested;
Fig. 4 B is the structural representation schematically showing the utility model circuit board upper surface to be tested;
Fig. 4 C is the structural representation schematically showing the utility model circuit board lower surface to be tested;
Fig. 5 is the diagrammatic cross-section of pick-up unit along electric light display screen A-A ' direction in Fig. 6 A, 6B of another specific embodiment of the utility model;
Fig. 6 A is electro-optic conversion screen display effect schematic diagram when pick-up unit applies first group of voltage in the utility model Fig. 5;
Fig. 6 B is electro-optic conversion screen display effect schematic diagram when pick-up unit applies second group of voltage in the utility model Fig. 5;
Fig. 7 is detection picture view when schematically showing the utility model circuit board regional area appearance display exception;
Fig. 8 is for schematically showing the diagrammatic cross-section along B-B ' direction when through hole open circuit appears in circuit board in the utility model Fig. 7 pick-up unit;
Fig. 9 is that after schematically showing the utility model Switching power polarity, detection picture view when showing abnormal appears in circuit board regional area;
Figure 10 is the diagrammatic cross-section along B-B ' direction when through hole open circuit appears in circuit board in the pick-up unit schematically showing the utility model Fig. 9;
Figure 11 schematically shows detection picture view time short circuit appears in the utility model circuit board regional area;
Figure 12 is for schematically showing the diagrammatic cross-section along C-C ' direction when short circuit appears in circuit board in the utility model Figure 11 pick-up unit;
Figure 13 is detection picture view when short circuit appears in circuit board regional area after schematically showing the utility model Switching power polarity;
Figure 14 is for schematically showing the diagrammatic cross-section along C-C ' direction when short circuit appears in circuit board in the utility model Figure 13 pick-up unit;
Figure 15 is the section simplified pinciple schematic diagram schematically showing another embodiment pick-up unit of the utility model;
Figure 16 is the diagrammatic cross-section along D-D ' direction schematically showing the pick-up unit that the utility model one specific embodiment odd-numbered line powers up;
Figure 17 be the circuit board under test schematically shown in the utility model Figure 16 normal time detect picture view;
Figure 18 A for schematically show the another specific embodiment circuit board under test of the utility model abnormal time detect picture view;
Figure 18 B is the diagrammatic cross-section along E-E ' direction when through hole open circuit appears in circuit board in the pick-up unit schematically showing the utility model Figure 18 A;
Figure 19 A detects picture view for schematically showing when another specific embodiment circuit board under test of the utility model is short-circuited;
Figure 19 B is the diagrammatic cross-section along F-F ' direction when short circuit appears in circuit board upper surface line pattern in the pick-up unit schematically showing the utility model Figure 19 A;
Figure 19 C is the diagrammatic cross-section along F-F ' direction when short circuit appears in circuit board lower surface line pattern in the pick-up unit schematically showing the utility model Figure 19 A;
Figure 20 is the diagrammatic cross-section schematically showing the pick-up unit that the utility model above-described embodiment even number line powers up;
Figure 21 normally detects picture for schematically showing when the utility model above-described embodiment circuit board under test even line electrode powers up;
Figure 22 A is for detecting picture view when schematically showing generation open circuit when the utility model above-described embodiment circuit board under test even line electrode powers up;
Along the diagrammatic cross-section in H-H ' direction when Figure 22 B is for schematically showing circuit board lower surface short circuit in the utility model Figure 22 A pick-up unit;
Figure 23 A detects picture view for schematically showing when the utility model above-described embodiment circuit board under test is short-circuited;
Figure 23 B is for schematically showing the diagrammatic cross-section along I-I ' direction when short circuit appears in circuit board upper surface in the utility model Figure 23 A pick-up unit;
Figure 23 C is for schematically showing the diagrammatic cross-section along I-I ' direction when short circuit appears in circuit board lower surface in the utility model Figure 23 A pick-up unit.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Fig. 1 is the section rough schematic view schematically showing the utility model one embodiment pick-up unit.As shown in Figure 1, the utility model provides a kind of pick-up unit, for the circuit defect of testing circuit plate 120, described circuit board has both side surface, its side or both side surface are furnished with circuit pattern, described pick-up unit comprises: electro-optic conversion screen 110, is arranged at a side surface of described circuit board 120, for showing check pattern; Power panel 130, is placed in the opposite side surface of described circuit board to be detected 120, for providing voltage for described electro-optic conversion screen and circuit board.
Adopt the detection method of above-described embodiment device, comprising: side electro-optic conversion screen being placed in circuit board; Power panel is placed in the opposite side of described circuit board; By applying voltage between the conductive layer that shields at described electro-optic conversion and described power panel, described electro-optic conversion screen display shows the check pattern of described circuit board.By contrasting the difference of shown check pattern and normal pattern, realize the defect such as short circuit, open circuit judging to exist in circuit board to be detected.
The electro-optic conversion screen that the utility model adopts is the display screen shown by electro-optic conversion media implementation, according to electric field level or the size of current of the electro-optic conversion medium both sides be added on electro-optic conversion screen, change the distribution of electro-optic conversion medium, thus change optical path direction or color, the final light-out effect changing display screen.Display technique directly can be transformed into the electric signal of different size the light signal of different brightness or different colours, thus demonstrates pattern.The utility model utilizes the electro-optical characteristic of display technique, according to the light signal of different brightness or different colours, judges to be added in the electric field level between the electro-optic conversion medium both sides in display screen, realizes low cost, judges the defect of circuit board under test accurately.
Below in conjunction with specific embodiment and accompanying drawing, pick-up unit of the present utility model and detection method are described in detail.
Fig. 2 is the diagrammatic cross-section of the pick-up unit of the utility model one specific embodiment.As shown in Figure 2, the utility model provides a kind of pick-up unit 200, comprising: electro-optic conversion screen 210, is placed in the upside of circuit board 220 to be detected, for showing check pattern; Power panel 230, is placed in the downside of described circuit board to be detected 220, for providing voltage for described electro-optic conversion screen 210 and described circuit board 220.As shown in Figure 2, electro-optic conversion screen 210, comprises upper substrate 211, infrabasal plate 214, and is clipped in the electro-optic conversion medium 213 between upper substrate 211, infrabasal plate 214.Upper substrate 211 covers conductive layer 212 near electro-optic conversion medium 213 side, and conductive layer 212 is preferably transparent tin indium oxide (ITO) conducting film.Upper substrate 211, infrabasal plate 214 can be glass substrate or resin (PET) substrate.Infrabasal plate is preferably the multi-layer film structure that organic film and inoranic membrane replace, and also can be silicon dioxide, the isopyknic insulation film of alundum (Al2O3).
As shown in Figure 2, circuit board 220 comprises base material 223, is positioned at base material 223 upper surface and is furnished with upper surface circuit 221, be positioned at the lower surface circuit 224 of base material 223 lower surface, connects the through hole 222 of upper surface circuit 221 and lower surface circuit 224.Upper surface circuit 221, lower surface circuit 224 are formed by conductive material; Connect upper surface circuit 221 and pass base material 223 with the through hole 222 of lower surface circuit 224, there is electricity linkage function.
As shown in Figure 2, power panel 203 comprises base plate 231, is positioned at the power electrode 232 of base plate 231 upper surface.Power electrode 232 is formed by the metal material conducted electricity, external power supply.Lower surface circuit about 224 one_to_one corresponding of power electrode 232 and circuit board 220.Preferably, power electrode 232 is the electrode of the regular shape distribution of strip electrode or array distribution.
In conjunction with referring to figs. 2 and 3, electro-optic conversion medium 213 is preferably in microcapsules the solution 213c of the white particles 213a being filled with electronegative black particles 213b and positively charged.Under the effect of electric field, black particles 213b and white particles 213a can correspondingly move up and down.Not during making alive, black and white particle 213b is suspended in pigmented fluids 213c, the color of what electro-optic conversion screen display was shown is solution; After making alive, electronegative black particles 213b moves on to positive pole side, and the white particles 213a of positively charged moves on to negative pole side.Picture is detected by viewing, can the defect such as short circuit, open circuit directly on decision circuitry plate 220.Because the contrast of black-white colors is high, by the mobile display color distortion of black and white particle, form high contrast parallax, facilitate the direct viewing of tester's naked eyes to judge, and do not need extra precision optical instrument to carry out optical detection differentiation.
Fig. 4 A is the schematic perspective view that the utility model schematically shows the utility model circuit board under test.As shown in Figure 4 A, in a specific implementation of circuit board 220, the identical patterns unit of upper surface line pattern 223a is array configuration, the identical patterns unit pattern also configuration in array of lower surface line pattern 223b, upper surface line pattern 223a realizes electricity with lower surface line pattern 223b by inner through hole 222 and is connected.
Fig. 4 B is the floor map that the utility model schematically shows the utility model circuit board upper surface to be tested line pattern.As shown in Figure 4 B, in the array pattern of surperficial 223a on circuit boards, each array pattern unit comprises odd-numbered line first line pattern 221a, as female pattern; Even number line second line pattern 221c, as convex pattern.Formation metal partition pattern 221b spaced apart between odd-numbered line first line pattern 221a and even number line second line pattern 221c, wherein, first and second pattern is metal line.
Fig. 4 C is that the utility model schematically shows the utility model circuit board lower surface to be tested line pattern floor map.As shown in Figure 4 C, in the array pattern of lower surface 223b, each array pattern unit comprises odd-numbered line the 4th line pattern 224a, derby 224b between even number line the 5th line pattern 224c, odd-numbered line the 4th line pattern 224a and even number line the 5th line pattern 224c, wherein fourth, fifth may be selected to be square metal block pattern.
With reference to figure 4A to 4C, upper surface line pattern 223a and lower surface 223b pattern realize electricity by inner through hole 222 and are connected and are specially odd-numbered line first line pattern 221a and realize electricity with odd-numbered line the 4th line pattern 224a by through hole 222 and be connected.Even number line second line pattern 221c realizes electricity with even number line the 5th line pattern 224c by through hole 222 and is connected.And described 4th line pattern and described 5th line pattern are separated by derby 224b.Described derby 224b does not have making alive in circuit board real work, and it can play the effects such as release electrostatic when real work.
Fig. 5 is that the circuit of another specific embodiment pick-up unit of the utility model connects diagrammatic cross-section.As shown in Figure 5, the utility model provides a kind of circuit board line characteristic detecting method step as follows:
A, power panel 330, circuit board 320 shield 310 with electro-optic conversion fits, described circuit board 320 by fitting after exactitude position with described power panel 330, makes the first power electrode 332b on power panel 330 corresponding with the odd-numbered line on circuit board 320 the 4th line pattern 324a and contacts; Make the second source electrode 332a on power panel 330 corresponding with the even number line on circuit board 320 the 5th line pattern 324c and contact.
B, the first power lead 333b of power panel 330 is connected the first power supply 342, apply the first voltage V1, be applied to described first voltage on described first power lead 333b by being transmitted to odd-numbered line lower surface the 4th line pattern 324a of circuit board 330 after the first power electrode 332b, then be transmitted to the upper surface first line pattern 321a of odd-numbered line by through hole 322; The second source line 333c of power panel 330 is switched on power 343, apply the second voltage V2, be applied to described second voltage on described second source line 333c by being transmitted to even number line lower surface the 5th line pattern 324c of circuit board 320 after second source electrode 332a, then be transmitted to the upper surface second line pattern 321c of even number line by through hole 322; The conductive layer 312 of electro-optic conversion screen 310 is connected the 3rd power supply 341, applies tertiary voltage V3.
C, voltage is set: V1<V3<V2, between the conductive layer 312 and the odd-numbered line upper surface first line pattern 321a of circuit board 320 of electro-optic conversion screen 310, be the longitudinal electric field for negative polarity on the downside of positive polarity on the upside of being formed, the while that the black particles in microcapsules 313 being moved up, white particles moves down; Between the conductive layer 312 and the even number line upper surface second line pattern 321c of circuit board 320 of electro-optic conversion screen 310, be the longitudinal electric field for positive polarity on the downside of negative polarity on the upside of being formed, the while that the white particles in microcapsules 313 being moved up, black particles moves down; Do not execute alive region, microcapsules state does not change.Form display frame as shown in Figure 6A: on electric light display screen 310, the upper surface first line area of the pattern 315a of corresponding odd-numbered line shows black, the upper surface second line pattern region 315b display white of corresponding even number line, the color of other regions display microcapsule solution.
D, continue to arrange voltage: V1>V3>V2, between the conductive layer 312 and the odd-numbered line upper surface first line pattern 321a of circuit board 320 of electro-optic conversion screen 310, be the longitudinal electric field for positive polarity on the downside of negative polarity on the upside of being formed, the while that the white particles in microcapsules 313 being moved up, black particles moves down; Between the conductive layer 312 and the even number line upper surface line pattern 321c of circuit board 320 of electro-optic conversion screen 310, be the longitudinal electric field for negative polarity on the downside of positive polarity on the upside of being formed, the while that the black particles in microcapsules 313 being moved up, white particles moves down; Do not execute alive region, microcapsules state does not change.Form display frame as shown in Figure 6B: the upper surface first line area of the pattern 315a display white of corresponding odd-numbered line on electric light display screen 310, the upper surface line pattern 315b of corresponding even number line shows black, the color of other regions display microcapsule solution.
In e, actual testing process, according to the display effect of electro-optic conversion screen, contrast with the normal detection picture shown in Fig. 6 A, 6B, can the electrology characteristic on decision circuitry printed line road.
In concrete realization, shown in the photoelectric display effect that described display result is described circuit board to be detected and 6A, 6B, the photoelectric display Contrast on effect of normal described circuit board, judges the position of short circuit or open circuit on described circuit board again according to the position of display defect.
In concrete realization, when there is detection picture as shown in Figure 7, the background color of electro-optic conversion screen 300 is the color of electro-optic conversion microcapsule solution, first line area of the pattern 315a is black region, its corresponding electronegative black particles moves to the upper surface of electro-optic conversion screen 300, second line pattern region 315b is white portion, and the white particles of its corresponding positively charged moves to the upper surface of electro-optic conversion screen 300.According to display effect; can tentatively judge to have occurred that display pattern is abnormal at the 3rd area of the pattern 316a of electro-optic conversion screen 310 and the 4th line pattern region 316b; by contrasting with Fig. 6 A, 6B normal pictures; upper surface line pattern disappearance or the lower surface line pattern disappearance of pattern anomalies region corresponding circuits plate respective regions can be judged, or through hole open circuit.Upper surface line pattern lacks, or lower surface line pattern disappearance, or the identical consequence of through hole open circuit does not apply voltage below corresponding region 316a and region.
As a specific embodiment, Fig. 8 is the diagrammatic cross-section that in the utility model pick-up unit, through hole open circuit appears in circuit board, the detection picture of pick-up unit shown in composition graphs 7.In fig. 8, the 3rd power supply 341 ground connection, second source 342 exports negative voltage, and the first power supply 343 exports positive voltage.Connect transparency conducting layer 312 ground connection of the first power supply 341, the power electrode 332b connecting the odd-numbered line of second source 342 connects negative voltage, and the power electrode 332a connecting the even number line of power supply 343 connects positive voltage.Correspondingly, corresponding circuits plate 320 odd-numbered line electrode 321a, the white particles of absorption positively charged, electronegative black particles is moved upwards up to the surface of electro-optic conversion screen 310 simultaneously, corresponding region display black.Corresponding circuits plate 320 even line electrode 321b, adsorbs electronegative black particles, and the white particles of positively charged is moved upwards up to the surface of electro-optic conversion screen 310 simultaneously, corresponding region display white.Because circuit board exists through hole open circuit 322a and 322b, corresponding upper surface line pattern does not apply voltage, and the electro-optic conversion medium of corresponding region 316a and 316b is the color of microcapsule solution.
As an embodiment, exchange the positive-negative polarity of the first power supply 343 and second source 342, detection picture shown in Fig. 7 switches to the detection picture shown in Fig. 9: odd-numbered line first line area of the pattern 315a switches to white from black, even number line second line pattern region 315b switches to black from white, and the change of color or brightness does not occur for third and fourth area of the pattern 316a, 316b that through hole open circuit occurs.
Figure 10 is the diagrammatic cross-section of the pick-up unit detecting picture shown in corresponding diagram 9.In Fig. 10, the 3rd power supply 341 ground connection, second source 342 exports positive voltage, and the first power supply 343 exports negative voltage.Connect transparency conducting layer 312 ground connection of the 3rd power supply 341, the power electrode 332b connecting the odd-numbered line of second source 342 connects negative voltage, and the power electrode 332a connecting the even number line of the first power supply 343 connects positive voltage.Correspondingly, corresponding circuits plate 320 odd-numbered line electrode 321a, adsorbs electronegative black particles, and the white particles of positively charged is moved upwards up to the surface of electro-optic conversion screen 310 simultaneously, corresponding region display white.Corresponding circuits plate odd-numbered line electrode 321b, the white particles of absorption positively charged, electronegative black particles is moved upwards up to the surface of electro-optic conversion screen simultaneously, corresponding region display black.Because circuit board exists through hole open circuit 322a and 322b, corresponding upper surface electrode does not apply voltage, and correspondingly third and fourth area of the pattern 316a, 316b electro-optic conversion medium is the color of microcapsule solution.
Figure 11 is the detection picture view of circuit board surface pattern when being short-circuited.As shown in figure 11, the odd-numbered line pattern 315a of electro-optic conversion screen 310 shows black, even number line pattern 315b display white.Region 316a, 316b that adjacent odd-numbered line pattern and even number line pattern are short-circuited show the solution colour of electro-optic conversion medium, and it is identical with above-mentioned Fig. 7 corresponding content that this electro-optic conversion shields 310 displaying principles, do not repeat them here.
As an embodiment, Figure 12 be the utility model circuit board surface pattern when being short-circuited diagrammatic cross-section.As shown in figure 12, occurring short-circuited region 321a at the upper surface line pattern of circuit board 320, there is short-circuited region 324a in lower surface line pattern, and the voltage applied information of pick-up unit is as follows: the 3rd power supply 341 ground connection, second source 342 exports negative voltage, and the first power supply 343 exports positive voltage.Connect transparency conducting layer 312 ground connection of the 3rd power supply 341, the power electrode 332b connecting the odd-numbered line of second source 342 connects negative voltage, and the power electrode 332a connecting the even number line of the first power supply 343 connects positive voltage.Correspondingly, corresponding circuits plate 320 odd-numbered line electrode 321a, the white particles of absorption positively charged, electronegative black particles is moved upwards up to the surface of electro-optic conversion screen 310 simultaneously, corresponding region display black.Corresponding circuits plate 320 even line electrode 321b, adsorbs electronegative black particles, and the white particles of positively charged is moved upwards up to the surface of electro-optic conversion screen simultaneously, corresponding region display white.The short-circuited region 316a of circuit board 320,316b, due to positive-negative polarity neutralization, corresponding electro-optic conversion medium could not show obvious black and white, the color of approximate display liquid.Preferably, equipment 334 sends alerting signal: lamp dodges or sends the sound, also can both have concurrently.Equipment 344 connects the first power supply 343 and second source 342 respectively, because the positive pole short circuit of the negative pole of second source 342 and the first power supply 343, just sends alerting signal after short-circuit current being detected by equipment 344.
As an embodiment, exchange the positive-negative polarity of the first power supply 343 and second source 342, detection picture shown in Figure 11 switches to the detection picture shown in Figure 13: odd-numbered line first line area of the pattern 315a switches to white from black, even number line second line pattern region 315b switches to black from white, and the change of color or brightness does not occur for third and fourth area of the pattern 316a, 316b that through hole open circuit occurs.
Figure 14 is the diagrammatic cross-section of the pick-up unit detecting picture shown in corresponding Figure 13.As shown in figure 14, occurring short-circuited region 316a at the upper surface line pattern of circuit board 320, there is short-circuited region 316b in lower surface line pattern.With reference to Figure 14, the voltage applied information of pick-up unit 300 is as follows: the 3rd power supply 341 ground connection, and second source 342 exports positive voltage, and the first power supply 343 exports negative voltage.Connect transparency conducting layer 312 ground connection of the 3rd power supply 341, the power electrode 332b connecting the odd-numbered line of second source 342 connects positive voltage, and the power electrode 332a connecting the even number line of the first power supply 343 connects negative voltage.Correspondingly, corresponding circuits plate 320 odd-numbered line electrode 321a, adsorbs electronegative black particles, and the white particles of positively charged is moved upwards up to the surface of electro-optic conversion screen 310 simultaneously, corresponding region display white.Corresponding circuits plate even line electrode 321c, the white particles of absorption positively charged, electronegative black particles is moved upwards up to the surface of electro-optic conversion screen simultaneously, corresponding region display black.The short-circuited region 316a of circuit board 320,316b, due to positive-negative polarity neutralization, corresponding electro-optic conversion medium could not show obvious black and white, the color of approximate display liquid.Meanwhile, equipment 344 sends alerting signal: lamp dodges or sends the sound, also can both have concurrently.Equipment 344 connects the first power supply 343 and second source 342 respectively, because the negative pole short circuit of the positive pole of second source 342 and the first power supply 343, just can send alerting signal after being detected by equipment 344.
Electro-optic conversion screen in the pick-up unit of the preferred specific embodiment of the utility model one adopts micro-cup type electro phoretic display device, and micro-cup structure has the advantages such as arbitrariness, structural intergrity and mechanical stability in moulding.The display effect of micro-cup structure and structural strength can be adjusted by the change of shape and size.Micro-glass of electrophoretic display technology as shown in figure 15 relies on special micro-cup structure, can obtain color separation and excellent mechanical property.In micro-cup structure, the size of micro-glass is generally about 50um, comprises the white particles 413b of positively charged and the solution 413a of black in micro-cup.The resolution of display graphics and the shape size of micro-glass have nothing to do, but depend on the arrangement of the electrode 414a of bottom backplate, and the data namely from different pixels electrode can be presented in same micro-cup.In fig .15, between the transparency conducting layer 412 and the electrode 414a of infrabasal plate of upper substrate 411, apply voltage, during electrode 414a inclined negative polarity, white particles is gathered in bottom, and on display screen, respective regions 410a is shown as black; Electrode 414a polarization polarity chron white particles is gathered in top, and on display screen, respective regions 410a is shown as white.Middle micro-cup belongs to two different pixel regions respectively in left-half and right half part, but can normally show in the same old way.Therefore, need not precisely contraposition when micro-glass of film and bottom backplate are fitted.
Figure 16 is the utility model one specific embodiment, the utility model provides a kind of pick-up unit 400, the structure of the detecting device of the present embodiment is roughly the same with detection method and above-described embodiment, its difference is only that the electro-optic conversion screen of the present embodiment have employed micro-cup type electro phoretic display device, does not repeat them here.
The utility model another embodiment still provides a kind of detection method, this detection method is applicable to the pick-up unit of each embodiment above-mentioned, and it is as follows that this detection uses the pick-up unit of above-described embodiment to carry out the method step of circuit board line Characteristics Detection:
A, power panel 430, circuit board 420 shield 410 with electro-optic conversion fits, described circuit board 420 by fitting after exactitude position with described power panel 430, makes the power electrode 432 on power panel 430 corresponding with the odd-numbered line square pattern 432 on circuit board 420 and contacts.
B, electro-optic conversion screen 410 conductive layer 412 and the power lead 433 of power panel 430 between switch on power 440, apply voltage Vc, be applied to described detection voltage on described power lead 433 by being transmitted to the odd-numbered line lower surface line pattern 424 of circuit board 420 after power electrode 432, then be transmitted to the upper surface line pattern 421 of odd-numbered line by through hole 422.
C, electro-optic conversion screen 410 conductive layer 412 and the odd-numbered line upper surface line pattern 421 of circuit board 420 between, described applying voltage Vc forms electric field, white particles in micro-cup 413 is moved up and down: micro-cup of corresponding odd-numbered line upper surface line pattern 421, white particles is positioned at conductive layer 412 side; The micro-cup-shaped state do not executed above alive even number line upper surface line pattern does not change, and is shown as the color mixture of dark solution and white particles.
D, display frame according to electro-optic conversion screen 410, shield with electro-optic conversion and normal detect picture and contrast, can the electrology characteristic on decision circuitry printed line road.
As a specific embodiment, when Figure 17 shows that circuit board is normal, detect picture view.As shown in figure 17, when the line characteristic of odd-numbered line circuit board is normal, the upper surface line pattern 415 of complete display odd-numbered line on electro-optic conversion screen 410.Correspondingly, when the upper complete display of electro-optic conversion screen picture as shown in figure 17, can the upper surface line pattern of preliminary judgement circuit board odd-numbered line and odd-numbered line lower surface line pattern and between the electrology characteristic of through hole normal.
In concrete realization, shown in the photoelectric display effect that described display result is described circuit board to be detected and Figure 17, the photoelectric display Contrast on effect of normal described circuit board, judges the position of short circuit or open circuit on described circuit board again according to the position of display defect.
Figure 18 A detects picture view when being depicted as circuit board exception.In conjunction with reference to figure 18B, 440 are switched on power between the conductive layer 413 and the power lead 433 of power panel 430 of electro-optic conversion screen, after applying voltage Vc, electro-optic conversion screen 410 shows picture as shown in Figure 18 A: in the display pattern array be made up of the display unit 1802 of corresponding circuits plate odd-numbered line upper surface line pattern, compared with Figure 17, there is no the pattern of display unit at position 416 place.According to the through hole 422a open defect that the position of display defect can circuit board described in preliminary judgement occur as shown in figure 18b.The existence of through hole 422 open defect, make the micro-cup on relevant position not be subject to the control of impressed voltage Vc, the white particles in micro-cup does not move up and down.
Figure 19 A detects picture view when being depicted as circuit board short circuit.In conjunction with reference to figure 19B, 440 are switched on power between the conductive layer 412 and the power lead 432 of power panel 430 of electro-optic conversion screen 410, after applying voltage Vc, electro-optic conversion screen 410 there is picture as shown in Figure 19 A: in the display pattern array be made up of the display unit of corresponding circuits plate 420 odd-numbered line upper surface line pattern, compared with Figure 17, demonstrate corresponding circuits plate odd-numbered line upper surface line pattern and corresponding circuits plate even number line upper surface line pattern at 421a place, position simultaneously.Circuit board described in preliminary judgement can there is the circuit defect between the odd-numbered line upper surface line pattern be connected as shown in Figure 19 B and even number line upper surface line pattern according to the position of display defect.The existence of described circuit defect, make micro-cup of corresponding odd-numbered line upper surface line pattern and even number line upper surface line pattern on relevant position be subject to the control of impressed voltage Vc, the white particles in micro-cup 413 moves up simultaneously.
In conjunction with reference 19C, short circuit appears on the lower surface line pattern of circuit board, generation connected odd-numbered line lower surface line pattern as shown in fig. 19 c and the circuit defect of even number line lower surface line pattern 424a, also there will be the display pattern of correspondence position as shown in Figure 19 A.The existence of described circuit defect, make micro-cup of corresponding odd-numbered line upper surface line pattern and even number line upper surface line pattern on relevant position be subject to the control of impressed voltage Vc, the white particles in micro-cup 413 moves up simultaneously.
In conjunction with referring to figures 16 to 19C, the detection method that the utility model provides, for the detection of the electrology characteristic of the various embodiments described above pick-up unit testing circuit plate odd-numbered line line pattern.Pick-up unit and the detection method of the electrology characteristic of corresponding circuits plate even number line line pattern are as follows:
As shown in figure 20, the display device that the utility model provides comprises electro-optic conversion screen 510, circuit board 520, power panel 530, and additional power source 540.In electro-optic conversion screen 510, the upside of micro-cup 513 is conductive layer 512, and the downside of micro-cup 513 is the protective seam 514 through anti-steam process.In circuit board 520, the upper surface line pattern 521 of array realizes electricity with the lower surface line pattern 524 of array by through hole 522 and is connected.In power panel 530, be dispersed with power electrode 532, power electrode 532 realizes electricity by power lead 533 with external power supply 540 and is connected.The arrangement of power electrode 532 is corresponding with the arrangement of lower surface line pattern 524.The detecting step of the circuit electrology characteristic of corresponding circuits plate even number line pattern is as follows:
A, power panel 530, circuit board 520 shield 510 with electro-optic conversion fits, described circuit board 520 and described power panel 530 are by fitting after exactitude position, make power electrode on power panel 530 532 and the even number line square pattern on circuit board 520, namely lower surface line pattern 524 is corresponding and contact.
B, electro-optic conversion screen 510 conductive layer 512 and the power lead 533 of power panel 530 between switch on power 540, apply voltage Vc, be applied to described detection voltage on described power lead 533 by being transmitted to the odd-numbered line lower surface line pattern 524 of circuit board 520 after power electrode 532, then be transmitted to the upper surface line pattern 521 of even number line by through hole 522.
C, electro-optic conversion screen 510 conductive layer 512 and the even number line upper surface line pattern 532 of circuit board 530 between, described applying voltage Vc forms electric field, the white particles in micro-cup 513 is moved up: micro-cup 513 state do not executed above alive even number line upper surface line pattern does not change.
According to the display effect of electro-optic conversion screen, judge the electrology characteristic of circuit board line as shown in figure 20.As shown in figure 21, when the line characteristic of even number line circuit board is normal, the upper surface line pattern 515 of complete display even number line on electro-optic conversion screen 510.Correspondingly, when the upper complete display of electro-optic conversion screen picture as shown in figure 21, can the upper surface line pattern of preliminary judgement circuit board even number line and odd-numbered line lower surface line pattern and between the electrology characteristic of through hole normal.
In concrete realization, shown in the photoelectric display effect that described display result is described circuit board to be detected and Figure 21, the photoelectric display Contrast on effect of normal described circuit board, judges the position of short circuit or open circuit on described circuit board again according to the position of display defect.
In one embodiment, in conjunction with reference to figure 22A and 22B, switch on power between the conductive layer and the power lead of power panel of electro-optic conversion screen 510, after applying voltage Vc, electro-optic conversion screen 510 there is picture as shown in fig. 22: in the display pattern array be made up of the display unit 513 of corresponding circuits plate even number line upper surface line pattern, compared with Figure 21, there is no the pattern of display unit at position 516 place.According to the through hole 522a open defect that the position of display defect can circuit board described in preliminary judgement occur as shown in Figure 22 B.The existence of through hole open defect, make the micro-cup on relevant position not be subject to the control of impressed voltage Vc, the white particles in micro-cup 513 does not move up and down.
In one embodiment, in conjunction with reference to figure 23A and 23B, switch on power between the conductive layer and the power lead of power panel of electro-optic conversion screen 510, after applying voltage Vc, electro-optic conversion screen 510 there is picture as shown in fig. 23 a: in the display pattern array be made up of the display unit of corresponding circuits plate even number line upper surface line pattern, compared with Figure 21, demonstrate corresponding circuits plate even number line upper surface line pattern and corresponding circuits plate odd-numbered line upper surface line pattern at position 516 place simultaneously.Circuit board described in preliminary judgement can there is the circuit defect between the even number line upper surface line pattern be connected as shown in fig. 23b and odd-numbered line upper surface line pattern 521a according to the position of display defect.The existence of described circuit defect, make micro-cup of corresponding even number line upper surface line pattern and odd-numbered line upper surface line pattern on relevant position be subject to the control of impressed voltage Vc, the white particles in micro-cup 513 moves down simultaneously.
In one embodiment, on the lower surface line pattern of circuit board, generation connected odd-numbered line lower surface line pattern as shown in fig. 23 c and the circuit defect of even number line lower surface line pattern 524a, also there will be the display pattern of correspondence position 516 as shown in Figure 19 A.The existence of described circuit defect, make micro-cup of corresponding odd-numbered line upper surface line pattern and even number line upper surface line pattern on relevant position be subject to the control of impressed voltage Vc, the white particles in micro-cup 513 moves up simultaneously.
Preferably, described electro-optic conversion screen is the particle mobile model Electronic Paper based on micro-glass of electrophoretic display technology.After having detected the circuit electrology characteristic of odd-numbered line pattern, before the circuit electrology characteristic detecting even number line pattern, in the display device shown in Figure 20, reverse voltage-Vc is applied between the conductive layer and the power lead of power panel of Electronic Paper, make the black pattern that Electronic Paper shows revert to white, thus the whole face of Electronic Paper revert to white.
The utility model make use of electro-optic conversion technology, namely according to the electric field level being added in the electro-optic conversion medium both sides such as liquid crystal, thus changes the light-out effect of electro-optic conversion medium.Display technique based on electro-optic conversion directly can be transformed into the electric signal of different size the light signal of different brightness, and converts the light signal of different colours to, thus is shown as pattern.Push away from the electro-optical characteristic of the display techniques such as liquid crystal is counter, according to the light signal of different brightness or different colours, the electric field level being added in the both sides of the electric light display mediums such as liquid crystal can be judged.Utilize this feature, can with the conducting of the display device test circuits such as liquid crystal or turn-off characteristic.
The pick-up unit that the utility model provides and detection method, based on the electrology characteristic of the display device testing circuit plate of electro-optic conversion, visual pattern more, can the disposable detection of realizing circuit plate front pattern.Compare the detection voltage of flying probe up to up to a hundred volts, for the display device testing circuit plate of electro-optic conversion, detect voltage drop order of magnitude, even only need several volt.When comparing flying probe, flying needle can prick the line pattern on circuit board, with the display device testing circuit plate based on electro-optic conversion, does not have additional mechanical force, can not cause the surface damage of circuit connection pattern.
More than describe preferred implementation of the present utility model in detail; but; the utility model is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present utility model; can carry out multiple equivalents to the technical solution of the utility model, these equivalents all belong to protection domain of the present utility model.
It should be noted that in addition, each the concrete technical characteristic described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode.In order to avoid unnecessary repetition, the utility model illustrates no longer separately to various possible array mode.
Claims (14)
1. a pick-up unit, for testing circuit plate, described circuit board has both sides, and described both sides are furnished with circuit pattern, comprising:
Electro-optic conversion shields, and is placed in the side of described circuit board, for showing check pattern;
Power panel, is placed in the opposite side of described circuit board, for providing voltage for described electro-optic conversion screen and circuit board.
2. pick-up unit according to claim 1, it is characterized in that: described electro-optic conversion screen also comprises upper substrate, infrabasal plate and is located in the electro-optic conversion medium between described upper and lower substrate, and described upper substrate is provided with conductive layer near described electro-optic conversion medium side.
3. pick-up unit according to claim 2, is characterized in that: described electro-optic conversion medium, under different voltage statuss or different current status, can show the combination of different brightness or different colors or different brightness and different colours.
4. pick-up unit according to claim 3, is characterized in that: described electro-optic conversion medium comprises charged black particles and white charged particles is distributed in coloring solution or clear solution.
5. according to the pick-up unit one of Claims 1-4 Suo Shu, it is characterized in that: the power electrode that described power panel also comprises base plate and is arranged on described base plate.
6. a pick-up unit, for testing circuit plate, described circuit board has both sides, and described both sides are furnished with circuit pattern, comprising:
Electronic Paper, is placed in a side surface of described circuit board, for showing check pattern;
Power panel, is placed in the opposite side surface of described circuit board, has base plate and be arranged at the power electrode on described base plate, for providing voltage for described Electronic Paper.
7. pick-up unit according to claim 6, it is characterized in that: described circuit board has both sides, multiple upper surface line unit is furnished with near Electronic Paper side, be furnished with multiple lower surface line unit near power panel side, between described upper surface line unit and described lower surface line unit, realize electrical connection by through hole.
8. pick-up unit according to claim 7, it is characterized in that: described multiple upper surface line unit is array distribution, described in each, upper surface line unit comprises: the first line pattern of odd-numbered line and the second line pattern of even number line, and insulate between described first line pattern and described second line pattern and separate.
9. pick-up unit according to claim 8, it is characterized in that: described multiple lower surface line unit is array distribution, described in each, lower surface line unit comprises: the 4th line pattern of odd-numbered line and the 5th line pattern of even number line, and described 4th line pattern and described 5th line pattern are separated by derby.
10. pick-up unit according to claim 9, is characterized in that: described first line pattern is connected by through hole electricity with described 4th line pattern; Described second line pattern is connected by through hole electricity by the 5th line pattern.
11. pick-up units according to claim 9 or 10, it is characterized in that: described power electrode is divided into two groups, one group is corresponding with described 4th line pattern, and another group is corresponding with described 5th line pattern.
12. pick-up units according to claim 9 or 10, is characterized in that: described power electrode is corresponding with one of described 4th line pattern or described 5th line pattern.
13. 1 kinds of pick-up units, for testing circuit plate, described circuit board has both sides, side is furnished with multiple in the odd-numbered line first line pattern of array distribution and the second line pattern of even number line, opposite side is furnished with multiple in odd-numbered line the 4th line pattern of array distribution and the 5th line pattern of even number line, realize being electrically connected respectively by through hole between described first, fourth line pattern with described second, five line patterns, comprising:
Electro-optic conversion screen is placed in the side of described circuit board, and described electro-optic conversion screen comprises upper substrate, infrabasal plate and is located in the electro-optic conversion medium between described upper and lower substrate, and described upper substrate is provided with conductive layer near described electro-optic conversion medium side;
Power panel is placed in the opposite side of described circuit board, and described power panel has multiple power electrode, and described multiple power electrode is respectively with described multiple first line pattern or multiple 4th line pattern is corresponding is electrically connected;
By applying between the conductive layer that shields at described electro-optic conversion and described power electrode to detect voltage, described detection voltage is transferred to described first line pattern, described through hole, described 4th line pattern or described 4th line pattern, described through hole, described first line pattern by described power electrode successively, realizes the check pattern that described electro-optic conversion screen display shows described circuit board.
14. 1 kinds of pick-up units, for testing circuit plate, described circuit board has both sides, side is furnished with multiple in the odd-numbered line first line pattern of array distribution and the second line pattern of even number line, opposite side is furnished with multiple in odd-numbered line the 4th line pattern of array distribution and the 5th line pattern of even number line, realize being electrically connected respectively by through hole between described first, fourth line pattern with described second, five line patterns, comprising:
Electro-optic conversion screen is placed in the side of described circuit board, and described electro-optic conversion screen comprises upper substrate, infrabasal plate and is located in the electro-optic conversion medium between described upper and lower substrate, and described upper substrate is provided with conductive layer near described electro-optic conversion medium side;
Power panel is placed in the opposite side of described circuit board, and described power panel has multiple power electrode, and described multiple power electrode is respectively with described multiple second line pattern or multiple 5th line pattern is corresponding is electrically connected;
By applying between the conductive layer that shields at described electro-optic conversion and described power electrode to detect voltage, described detection voltage is transferred to described second line pattern, described through hole, described 5th line pattern or described 5th line pattern, described through hole, described second line pattern by described power electrode successively, realizes the check pattern that described electro-optic conversion screen display shows described circuit board.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520175551.1U CN204613338U (en) | 2015-03-26 | 2015-03-26 | Pick-up unit |
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| CN201520175551.1U CN204613338U (en) | 2015-03-26 | 2015-03-26 | Pick-up unit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105988059A (en) * | 2015-03-26 | 2016-10-05 | 上海纪显电子科技有限公司 | Detection device and detection method |
| CN106449461A (en) * | 2016-11-07 | 2017-02-22 | 南京华东电子信息科技股份有限公司 | Method of connection test for array test block on TFT substrate |
-
2015
- 2015-03-26 CN CN201520175551.1U patent/CN204613338U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105988059A (en) * | 2015-03-26 | 2016-10-05 | 上海纪显电子科技有限公司 | Detection device and detection method |
| CN106449461A (en) * | 2016-11-07 | 2017-02-22 | 南京华东电子信息科技股份有限公司 | Method of connection test for array test block on TFT substrate |
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