CN101074977A - Electrode inspector - Google Patents
Electrode inspector Download PDFInfo
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- CN101074977A CN101074977A CN 200610080244 CN200610080244A CN101074977A CN 101074977 A CN101074977 A CN 101074977A CN 200610080244 CN200610080244 CN 200610080244 CN 200610080244 A CN200610080244 A CN 200610080244A CN 101074977 A CN101074977 A CN 101074977A
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Abstract
A detection device of electrode is prepared as using a sensing unit with the first and the second detection switches to receive a reference voltage, using one end of two said detection switches to connect with two ends of said electrode for detecting out resistance size of said electrode, generating a sensing voltage according to detected out resistance value and comparing sensing voltage value with a reference voltage value by comparison unit in order to judge whether detected electrode is damaged or not.
Description
Technical field
The invention relates to a kind of pick-up unit, particularly about a kind of electrode inspector with high detection speed.
Background technology
General liquid crystal indicator (Liquid Crystal Display, LCD), mainly be to utilize tin indium oxide (Indium Tin Oxide, ITO) or indium-zinc oxide (Indium Zinc Oxide, IZO) nesa coating promptly uses as electrode (electrode) as the electrically conducting transparent material.In process of production, general single electrode itself can have a fixing resistance value, the situation of can not open circuit (resistance infinity) under normally functioning state; And between two electrodes under normally functioning state, must present and open circuit, the situation of can mutual conduction be short-circuited (resistance approximates zero).Yet, under the situation of reality, but can be because of processing procedure, environment ... etc. factor cause short circuit phenomenon between opening circuit of unitary electrode or two electrodes.Therefore, just must utilize the electrode testing fixture to check the situation whether those electrodes are short-circuited or open circuit during production, produce yield so as to improving.
Fig. 1 shows Taiwan No. 124700 disclosed a kind of conductive pattern testing fixture 10 of patent (being above-mentioned electrode inspector) and utilizes this device 10 to detect the synoptic diagram of two electrode L1, L2.As shown in the drawing, this conductive pattern testing fixture 10 comprises one first voltage source V 1, one first current detecting meter M1, one second voltage source V 2 and one second current detecting meter M2.The measurement mechanism of the circuit that this figure shows is to utilize above-mentioned voltage source to cooperate Ohm law to realize with the detection meter.
Carrying out whether short circuit or when opening circuit of detecting electrode, generally the resistance R L2=R3+R4 of the resistance R L1=R1+R2, the second electrode L2 that when design, are scheduled to of the hypothesis first electrode L1 and suppose that issuable bleeder resistance is RLL between two electrode L1, the L2 in advance.When detecting single electrode L1 and whether open circuit, must utilize first voltage source V 1 to provide a predeterminated voltage V1p to electrode L1, and utilize the first current detecting meter M1 to measure size of current M1t on the first electrode L1, use Ohm law to calculate the size of the actual amount measuring resistance Rre of electrode L1, Rre=V1p/M1t again.Actual amount measuring resistance value Rre with electrode L1 compares with the electrode resistance RL1 that is scheduled at last, if the electrode resistance RL1 that the actual size that measures Rre equals to be scheduled to, then electrode L1 is a normal electrode; If the right numerical value of actual amount measuring resistance Rre can determine electrode L1 and open circuit during greater than predetermined electrode resistance RL1, and this electrode L1 belongs to abnormal electrode.Similarly, measure the mode whether single electrode L2 open circuit and measure single electrode L1 identical, the rest may be inferred.On the other hand, detecting when whether being short-circuited between two electrode L1, the L2, at first can suppose leakage position that electrode L1 takes place at the node A place between resistance R 1 and the R2, the Node B place of electrode L2 generation leakage position between resistance R 3 and R4.Therefore, as shown in Figure 1, suppose that promptly the two ends of bleeder resistance RLL are connected with node A, B respectively.And the general method that measures can be divided into following three kinds: one, only utilize voltage source V 1 and detection meter M2 to detect; Two, only utilize voltage source V 2 and detection meter M1 to detect; Three, use the detected numerical value addition of above-mentioned dual mode respectively and calculated the result afterwards.In first kind of mode, be with detection meter M1 and voltage source V 2 open circuits, only utilize voltage source V 1 to provide voltage V1p to electrode L1, and utilize to detect meter M2 and measure voltage source V 1, resistance R 1 from the electrode L1, through bleeder resistance RLL to the electrode L2 resistance R 3 and detect electric current M2t size between the meter M2.Use Ohm law to calculate the size of bleeder resistance RLL, RLL=V1p/M2t-(R1+R3) afterwards again.Certainly, in the application of reality,, promptly can't calculate the size of (R1+R3) if do not know leakage position.But do not leak when taking place if having, V1p/M2t will become very large numerical value (much larger than predetermined resistance R 1+R3).Therefore can judge the existing picture that is not short-circuited between electrode L1 and the electrode L2, represent to belong to normal condition between two electrodes.Because the principle of these three kinds of modes is all identical so only enumerate above-listed first kind of mode and illustrate, no longer repeat to give unnecessary details other dual mode.
Though, conductive pattern testing fixture 10 can be reached detecting electrode whether short circuit or the effect that opens circuit, but no matter be to check to open circuit or short circuit, this device all must utilize Ohm law to calculate the resistance value of actual measurement one by one after reading the current value size that detects meter, whether predetermined resistance sizes equates or excessive at the beginning of the resistance sizes of judging this actual measurement again and the design, so as to reaching the effect of measurement.So, when volume production, will improve manpower and manufacturing cost, and utilize manpower to measure to be easy to generate error in measurement; And often spend many times when calculating each electrode resistance value and check the position that electrode takes place to leak one by one, the result will cause required time-histories to increase, do not meet a large amount of requirements of test fast and accurately of production line.Moreover, the control device of this circuit (not icon) not only complex structure, costing an arm and a leg and keeping in repair is difficult for.Therefore, how to provide a kind of electrode inspector of energy fast detecting electrode, reduce because of the cost of spent time of calculating electrode resistance value, saving external control device, so as to increasing the production capacity of total system, reality is a urgent problem.
Summary of the invention
At the problems referred to above, purpose of the present invention reduces because of the spent time of calculated resistance value, reaches the cost of saving outer detecting circuit at the device that a kind of fast detecting electrode is provided, and increases the effect of system's production capacity.
For reaching above-mentioned purpose, the invention provides a kind of electrode inspector.This electrode inspector is in order to a plurality of electrodes in the detection display panels, and electrode inspector comprises a sensing cell and a comparing unit.Sensing cell is in order to two ends that connect any electrode or the arbitrary end that connects any two different electrodes respectively, so as to detecting the resistance sizes between same electrode or the different electrode, and produces a sensing voltage according to this detected resistance value.And comparing unit receives and compare a sensing voltage and a reference voltage, and produces a comparative voltage according to result relatively.Judge that then whether comparative voltage is greater than producing an output voltage behind the predeterminated voltage.Utilize the size of output voltage to judge whether tested electrode opens circuit or short circuit at last.
Electrode inspector of the present invention utilize electrode resistance value because of short circuit, the voltage differences that is caused that opens circuit judges whether tested electrode normal, and replaces the testing circuit of known complexity with operational amplifier.And can measure the state of electrode accurately, and reduce the traditional detection device to calculate the spent time of each electrode resistance value, more save the cost of outer detecting circuit, improve the speed of detecting electrode, and then increase the production capacity of total system.
Description of drawings
Fig. 1 shows a kind of synoptic diagram of known conductive pattern testing fixture.
Fig. 2 A shows the synoptic diagram of a kind of electrode inspector of the present invention.
Fig. 2 B shows an embodiment of electrode inspector of the present invention.
Another embodiment of the electrode inspector of Fig. 2 C displayed map 2B.
Fig. 2 D shows another embodiment of electrode inspector of the present invention.
Fig. 2 E shows another embodiment of electrode inspector of the present invention.
Fig. 2 F shows another embodiment of electrode inspector of the present invention.
Embodiment
Below with reference to graphic detailed description the present invention, and identical assembly will be with identical symbology.
Fig. 2 A is the synoptic diagram that shows a kind of electrode inspector detecting electrode of the present invention.This electrode inspector 20 in order to detect single electrode and whether open circuit or a plurality of (comprising two) electrode between the state that whether is short-circuited.Electrode inspector 20 comprises a sensing cell 21 and a comparing unit 22.This sensing cell 21 receives a reference voltage Vref, and sensing cell 21 is in order to the two ends of arbitrary electrode Ln among connection electrode L1～Lm respectively or connect arbitrary end of any two different electrode Ln and Lx respectively, detect the resistance value size between same electrode Ln or different electrode Ln and the Lx, and produce a sensing voltage Vs according to detected next resistance value.Wherein, m, n, x are positive integer, 1≤n≤m, 1≤x≤m, and n ≠ x.Comparing unit 22 receives and comparison reference voltage Vref and sensing voltage Vs, and produces an output voltage V o according to result relatively, and utilizes the size of this output voltage V o to judge whether tested electrode is normal.Certainly, electrode herein can be tin indium oxide or indium-zinc oxide nesa coating.
Fig. 2 B, Fig. 2 C are embodiment who shows electrode inspector of the present invention.Fig. 2 B is that show electrode pick-up unit 20 detects single the synoptic diagram whether electrode Lm opens circuit.Fig. 2 C is that show electrode pick-up unit 20 detects the synoptic diagram that whether is short-circuited between two electrode L1 and the L3.
By Fig. 2 B, Fig. 2 C as can be known, electrode inspector 20 comprises a sensing cell 21 and a comparing unit 22.Sensing cell 21 comprises a resistor R 1 and one first operational amplifier OPA1.One end ground connection of this resistor R 1, and shown in Fig. 2 B, when whether single electrode Lm of detection opened circuit, the other end of resistor R 1 was connected to the end of electrode Lm, and form a node C in the junction, and the resistance value of resistor R 1 must be selected the resistance value greater than this electrode Lm; And shown in Fig. 2 C, when detecting between any two different electrode L1 and the L3 whether short circuit, the other end of this resistor R 1 is connected with the end of electrode L1, and also forms same node C, and the resistance value of resistor R 1 then must be selected the resistance value greater than this electrode L1 and L3 addition.The non-inverting input of operational amplifier OPA1 receives reference voltage Vref, so the voltage V2 of the voltage V1 of its non-inverting input and reverse input end is equal to reference voltage Vref, i.e. V1=V2=Vref.And the reverse input end connected node C of operational amplifier OPA1.And shown in Fig. 2 B, when whether single electrode Lm of detection opened circuit, the output terminal of operational amplifier OPA1 was connected to the other end of the electrode Lm that is connected with resistor R 1; And shown in Fig. 2 C, when detecting between any two different electrode L1 and the L3 whether short circuit, the output terminal of operational amplifier OPA1 then is connected to the arbitrary end with resistor R 1 disjunct electrode L3, and by its output terminal output sensing voltage Vs.
Comparing unit 22 comprises one second an operational amplifier OPA2 and a Zener diode Zr.The non-inverting input of this second operational amplifier OPA2 receives sensing voltage Vs, and its reverse input end receives reference voltage Vref.Therefore, the voltage V3 of the non-inverting input of operational amplifier OPA2 equals Vs; And the voltage V4 of its reverse input end equals Vref.
Then, this operational amplifier OPA2 is when running, and the size of meeting comparative voltage V3 (sensing voltage Vs) and voltage V4 (reference voltage Vref) is about to sensing voltage Vs and reference voltage Vref and subtracts each other, so as to producing comparative voltage Vc.The positive ending grounding of Zener diode Zr, negative terminal are connected with the output terminal of the second operational amplifier OPA2.This Zener diode is after receiving comparative voltage Vc, and the stabilizing voltage characteristic of utilization itself carries out the voltage stabilizing processing to comparing voltage Vc, to produce output voltage V o.
When comparing unit 22 utilizes Zener diode Zr to carry out voltage stabilizing to handle, comparing unit 22 with the Zener voltage Vz of Zener diode Zr as predeterminated voltage.And when single tested electrode Lm open circuit or tested two electrode L1 and L3 between when not being short-circuited, the comparative voltage Vc that operational amplifier OPA2 produces will be greater than predeterminated voltage Vz.Because this moment, comparative voltage Vc was greater than predeterminated voltage Vz, therefore will cause Zener diode Zr to produce the collapse phenomenon, make output voltage V o equal Zener voltage Vz.So comparing unit 22 can utilize the stabilizing voltage characteristic of Zener diode Zr the size of output voltage V o to be set at the size of this predeterminated voltage Vz.At last, (Analog toDigital Converter, ADC) (not icon) are converted to the output voltage V o that simulates numerical data and obtain the detection data through a flash-type A/D converter again.On the other hand, when single tested electrode Lm not do not open circuit or tested two electrode L1 and L3 between when being short-circuited, the comparative voltage Vc of operational amplifier OPA2 generation will be less than predeterminated voltage Vz.Because comparative voltage Vc less than predeterminated voltage Vz, can't cause Zener diode Zr to produce the collapse phenomenon.Therefore, the big young pathbreaker of output voltage V o equals comparative voltage Vc.At last, equally again through a flash-type A/D converter (not icon), the output voltage V o that simulates is converted to numerical data obtains the detection data.In sum, when disposal system obtain detect data after, can according to those detect data judge single tested electrode Lm, and electrode L1, L3 between the problem that whether is short-circuited or opens circuit.
How below illustrate electrode inspector 20 detects single electrode Ln and how to detect any two electrodes Ln and Lx.And suppose, the resistance value RL1～RLm of each the electrode Ln among electrode L1～Lm is 9K Ω (ohm), reference voltage Vref is that 5V (volt), predeterminated voltage (Zener voltage Vz) they are 5V.Palpus attention person, when detecting single electrode Ln, the resistance value of resistor R 1 must be greater than the resistance value RLn of this tested electrode Ln; And when detecting any two electrodes Ln and Lx, the resistance value of resistor R 1 must be greater than the resistance value RLn+RLx of tested electrode Ln and Lx.The resistance value of resistor R 1 is assumed to be 10K Ω at this when therefore, detecting single electrode Ln; And when detecting any two electrodes Ln and Lx, the resistance value of resistor R 1 then must be assumed to be 20K Ω.
At first, illustrate how about electrode inspector 20 detects the function mode whether single electrode Ln opens circuit.Shown in Fig. 2 B, bring in the two ends of connection electrode Lm (9K Ω) respectively, when whether opening circuit, can derive following equation when electrode inspector 20 utilizes the output of the node C of sensing cell 21 and the first operational amplifier OPA1 by the circuit of this figure so as to detecting electrode Lm:
V1＝V2＝V4＝Vref (1)
V3＝Vs＝(1+(RLm/R1))×V1 (2)
Therefore V1=V2=V4=5V, and at this electrode Lm for just often, V3=Vs=(1+ (9/10)) * 5=9.5V.And after comparing unit 22 receives sensing voltage 9.5V and reference voltage 5V, sensing voltage and reference voltage subtracted each other and try to achieve a comparative voltage Vc=9.5-5=4.5V.Because comparative voltage 4.5V is less than predeterminated voltage 5V, so Zener diode do not act on, and makes output voltage V o equal 4.5V.Utilize one 12 flash-type A/D converters (not icon) that the output voltage 4.5V of simulation is converted to numerical data 3686 at last again.Yet, when tested electrode Lm opens circuit, the resistance value RLm of electrode Lm becomes and approximates infinity (∞), so output sensing voltage Vs=V3=(1+ (∞/10)) * 5=∞ V of the first operational amplifier OPA1, so the second operational amplifier OPA2 is after comparing sensing voltage Vs and reference voltage Vref, the comparative voltage Vc of output is also much larger than 5V.Because comparative voltage Vc is greater than Zener voltage Vz, so the comparing unit 22 outputs one output voltage V o that equals 5 volts.As a result, with after the output voltage 5V conversion, can obtain one 4095 numerical data through one 12 flash-type A/D converters (not icon).Hence one can see that, and electrode inspector 20 as output voltage V o during less than 5V (numerical data is less than 4095), can be judged this tested electrode Ln for normal when detecting single electrode Ln, can continue to use; When output voltage V o equals 5V (numerical data equals 4095), can judge this tested electrode Ln for opening circuit, must eliminate.Mode according to this, electrode inspector 20 of the present invention can be reached the effect of judging whether single electrode opens circuit.
Then, illustrate how electrode inspector 20 detects the function mode that whether is short-circuited between any two electrodes Ln and the Lx.At first, the bleeder resistance of establishing between wantonly two electrode Ln and the Lx is RLL, and RLL equals infinitely great (∞) when not having short circuit between two electrode Ln and the Lx; And when two electrode Ln and Lx short circuit RLL equal zero (0).Shown in Fig. 2 C, bring in the end of the end of connection electrode L1 (9K Ω) respectively and electrode L3 (9K Ω) when electrode inspector 20 utilizes the output of the node C of sensing cell 21 and the first operational amplifier OPA1, so as to detecting electrode L1 and L3 between whether during short circuit, can derive following equation by the circuit of this figure:
V3＝Vs＝(1+((RLn+RLx+RLL)/R1))×V1 (3)
Therefore, when between two electrode L1 and L3, normally not being short-circuited, sensing voltage Vs=V3=(1+ ((9+9+ ∞)/20)) * 5=∞ V.So after the second operational amplifier OPA2 compared sensing voltage Vs and reference voltage Vref, the comparative voltage Vc of output will be much larger than 5V.Because comparative voltage Vc is greater than Zener voltage Vz, so the comparing unit 22 outputs one output voltage V o that equals 5 volts.As a result, with after the output voltage 5V conversion, can obtain one 4095 numerical data through one 12 flash-type A/D converters (not icon).Yet, when being short-circuited between two tested electrode Ln and the Lx, sensing voltage Vs=V3=(1+ ((9+9+0)/20)) * 5=9.5V.So comparing unit 22 is tried to achieve a comparative voltage Vc=9.5-5=4.5V after comparing sensing voltage 9.5V and reference voltage 5V.Because comparative voltage 4.5V is less than predeterminated voltage 5V, so Zener diode do not act on, and makes output voltage V o equal 4.5V.Utilize one 12 flash-type A/D converters (not icon) that the output voltage 4.5V of simulation is converted to numerical data 3686 at last again.Hence one can see that, and whether electrode inspector 20 is detecting when being short-circuited between any two electrodes Ln and the Lx, when output voltage V o equals 5V (numerical data equals 4095), can judge between two tested electrode Ln and the Lx to normal, can continue to use; And work as output voltage V o less than 5V (numerical data is less than 4095), can judge between two tested electrode Ln and the Lx is short circuit, must eliminate.Mode according to this, electrode inspector 20 of the present invention can be reached and judge the effect that whether is short-circuited between any two electrodes.
Electrode inspector 20 of the present invention and known conductive pattern testing fixture 10 are in comparison, electrode inspector 20 can use sensing cell 21 and comparing unit 22 to detect directly whether single electrode Ln itself opens circuit or any two electrodes Ln and Lx between whether be short-circuited, and needn't calculate the size of actual amount measuring resistance and well whether compare tested electrode in artificial mode as use Ohm law as the known technology complicatedly according to the difference of resistance.Moreover known conductive pattern testing fixture 10 must check one by one also that when detecting the place that electric current leaks takes place each electrode L1～Lm, does not come out then can't detect consuming time in the extreme and consequence that also may get half the result with twice the effort if check.Therefore, electrode inspector 20 of the present invention can be reached the effect of fast detecting electrode Ln, so as to increasing production efficiency, reducing production costs.
Fig. 2 D is another embodiment that shows electrode inspector of the present invention.This electrode inspector 20 ' is roughly the same with the framework and the function mode of the electrode inspector 20 of Fig. 2 B, and difference is that electrode inspector 20 ' has increased by one first detector switch Sw2a and one second detector switch Sw2b in sensing cell 21.The end of the first detector switch Sw2a is connected with the node C of sensing cell 21, and the other end optionally electrically connects the end of arbitrary electrode Ln among L1～Lm.The end of the second detector switch Sw2b connects the output terminal of the first operational amplifier OPA1, and the other end optionally electrically connects the other end of the same electrode Ln that this first detector switch Sw2a connects or electrically connect arbitrary end of arbitrary electrode of not being connected with this first detector switch Sw2a (L1～Lm, and be not Ln).For example, when the first detector switch Sw2a is connected with the end of electrode L3, whether if want detecting electrode L3 to open circuit, then the second detector switch Sw2b will be connected to the other end of electrode L3; If want between detecting electrode L3 and the electrode L1 whether short circuit, then the second detector switch Sw2b will be connected to arbitrary end of electrode L1.When running, can cooperate control module (not icon) to be controlled this first detector switch Sw2a and one second detector switch Sw2b, apace electrode L1～electrode Lm be scanned.Mode according to this, can be at short notice at open circuit the detection with short circuit of a plurality of electrodes.Detecting electrode and reach a large amount of and requirement of test fast of production line so more quickly.
Fig. 2 E is another embodiment that shows electrode inspector of the present invention.This electrode inspector 20 " roughly the same with the framework and the function mode of the electrode inspector 20 ' of Fig. 2 D; difference is electrode inspector 20 " in sensing cell 21, increased a plurality of resistor R 1...Rn (n is a positive integer, and n is greater than 1) and a resistor selector switch Sw1.The end of each resistor R 1...Rn among those resistor R 1...Rn is interconnected to form node C.This node C is connected to the end of the first detector switch Sw2a.And the end ground connection of resistor selector switch Sw1, the other end is in order to select the arbitrary resistor among the R1...Rn.When detecting arbitrary electrode Ln, the selection that can utilize control module (not icon) to come control resistor selector switch Sw1, and the selected resistance value of resistor selector switch Sw1 must be greater than the resistance value of present tested electrode Ln; Relatively, when detecting any two electrodes Ln, Lx, the selected resistance value of resistor selector switch Sw1 must be greater than the summation of these two tested electrode Ln, the addition of Lx resistance value.Electrode inspector 20 of the present invention " utilize resistor selector switch Sw1 to select resistance sizes, can be more convenient and select to be applicable to the resistance of present tested electrode Ln apace, and then promote prouctiveness.
Palpus attention person, in the above-described embodiments, the reference voltage Vref that the second operational amplifier OPA2 in the comparing unit 22 of each embodiment is received is all directly received by the outside; Certainly, this reference voltage Vref also can be provided by sensing cell 22.Another electrode inspector 20 shown in Fig. 2 F, the reverse input end of the second operational amplifier OPA2 is connected with the node C of sensing cell 21 among this figure of 2F, utilize the characteristic of the imaginary short (Virtual Short) of this first operational amplifier OPA1 that reference voltage Vref is provided to node C, the last node C that sees through again transmits the reverse input end that reference voltage Vref is given the second operational amplifier OPA2.Whereby, can reach the effect that receives reference voltage Vref equally.
Though more than with embodiment the present invention is described, therefore do not limit scope of the present invention, if the sector person carries out various distortion or change, only otherwise break away from main idea of the present invention, also do not break away from claim of the present invention.
Claims (15)
1. electrode inspector, in order to detect a plurality of electrodes in the display panels, this electrode inspector comprises:
One sensing cell, receive a reference voltage, and this sensing cell comprises one first detector switch and one second detector switch at least, this first detector switch connects the two ends of arbitrary former electrodes with an end of this second detector switch or connects arbitrary end of any two different electrodes respectively, those detector switches are in order to detecting the resistance sizes between same electrode or the different electrode, and produce a sensing voltage according to this detected resistance value; And
One comparing unit receives and comparison of aforementioned reference voltage and aforementioned sensing voltage, and produces a comparative voltage according to result relatively, and judges that whether this comparative voltage is greater than producing an output voltage behind the predeterminated voltage;
Wherein, when tested arbitrary former electrodes open circuit or tested any two former electrodes between when not being short-circuited, aforementioned comparative voltage will be greater than aforementioned predeterminated voltage, and then aforementioned comparing unit is set at the size of aforementioned output voltage the size of this predeterminated voltage; When tested arbitrary former electrodes not do not open circuit or tested any two former electrodes between when being short-circuited, aforementioned comparative voltage will be less than aforementioned predeterminated voltage, and then aforementioned comparing unit is set at the size of aforementioned output voltage the size of this comparative voltage.
2. electrode inspector as claimed in claim 1, wherein aforementioned sensing cell also comprises:
One resistor, an end ground connection of this resistor, and its other end is connected to the other end of aforementioned first detector switch and form a node in the junction; And
One first operational amplifier, the non-inverting input of this first operational amplifier receives above-mentioned reference voltage, and its reverse input end connects aforementioned nodes, with and output terminal connect the other end of aforementioned second detector switch and this output terminal in order to produce aforementioned sensing voltage.
3. electrode inspector as claimed in claim 1, wherein aforementioned sensing cell comprises:
A plurality of resistors, an end of each resistor is interconnected to form a node, and this node is connected to the other end of aforementioned first detector switch;
One resistor selector switch, one end ground connection of this resistor selector switch, the other end is in order to select arbitrary aforementioned resistor, when detecting arbitrary former electrodes, this resistor selector switch is connected to the other end of an aforementioned resistor, wherein the resistance value of this resistor is greater than the resistance value of this tested electrode, and when detecting any two former electrodes, this resistor selector switch is connected to the other end of another aforementioned resistor, and wherein the resistance value of this resistor is greater than the summation of these two tested electrode resistance value additions; And
One first operational amplifier, the non-inverting input of this first operational amplifier receives above-mentioned reference voltage, and its reverse input end connects aforementioned nodes, with and output terminal connect the other end of aforementioned second detector switch and this output terminal in order to produce aforementioned sensing voltage.
4. electrode inspector as claimed in claim 1, wherein aforementioned comparing unit comprises:
One second operational amplifier, the non-inverting input of this second operational amplifier receives aforementioned sensing voltage, and its reverse input end receives above-mentioned reference voltage, and relatively this sensing voltage and this reference voltage, to produce aforementioned comparative voltage; And
One Zener diode, the positive ending grounding of this Zener diode, and its negative terminal is connected with the output terminal of aforementioned second operational amplifier, and the Zener voltage of utilizing this Zener diode is as aforementioned predeterminated voltage.
5. electrode inspector as claimed in claim 1 also comprises a flash-type A/D converter, is converted to a numerical data in order to the output voltage with aforementioned comparing unit output.
6. electrode inspector as claimed in claim 1, wherein former electrodes is indium tin oxide transparent conducting film or indium-zinc oxide nesa coating.
7. electrode inspector, in order to detect a plurality of electrodes in the display panels, this electrode inspector comprises:
One sensing cell comprises:
One resistor, an end ground connection of this resistor, and its other end is connected to an end of aforementioned arbitrary electrode, and form a node in the junction; And
One first operational amplifier, the non-inverting input of this first operational amplifier receives a reference voltage, and its reverse input end connection aforementioned nodes, and
Its output terminal connects the other end of the same electrode that aforementioned resistor connects or arbitrary end of different electrodes, and this first operational amplifier produces a sensing voltage by detecting a resistance value in the tested electrode according to this detected resistance value; And
One comparing unit comprises:
One second operational amplifier, the non-inverting input of this second operational amplifier receives aforementioned sensing voltage, and its reverse input end receives above-mentioned reference voltage, and relatively this sensing voltage and this reference voltage, to produce a comparative voltage; And
One Zener diode, the positive ending grounding of this Zener diode, and its negative terminal is connected with the output terminal of aforementioned second operational amplifier, and the Zener voltage of utilizing this Zener diode is as a predeterminated voltage;
Wherein, when tested arbitrary former electrodes open circuit or tested any two former electrodes between when not being short-circuited, aforementioned comparative voltage will be greater than aforementioned predeterminated voltage, then aforementioned comparing unit is exported this predeterminated voltage; When tested arbitrary former electrodes not do not open circuit or tested any two former electrodes between when being short-circuited, aforementioned comparative voltage will be less than aforementioned predeterminated voltage, then aforementioned comparing unit is exported this comparative voltage.
8. electrode inspector as claimed in claim 7, wherein aforementioned resistor are to utilize one first detector switch to connect an end of arbitrary former electrodes; And aforementioned first operational amplifier is the arbitrary end that utilizes one second detector switch to electrically connect the other end of the same electrode that is connected with this first detector switch or electrically connect the arbitrary electrode that is not connected with this first detector switch.
9. electrode inspector as claimed in claim 7, wherein the resistance value of aforementioned resistor is greater than the resistance value of aforementioned any two different electrode additions.
10. electrode inspector as claimed in claim 7, the reverse input end of wherein aforementioned second operational amplifier connects aforementioned nodes.
11. electrode inspector as claimed in claim 7 also comprises a flash-type A/D converter, is converted to a numerical data in order to comparative voltage or predeterminated voltage with aforementioned comparing unit output.
12. an electrode inspector, in order to detect a plurality of electrodes in the display panels, this electrode inspector comprises:
One sensing cell comprises:
A plurality of resistors, an end of each resistor is interconnected to form a node, and this node is connected to an end of aforementioned arbitrary electrode;
One resistor selector switch, one end ground connection of this resistor selector switch, the other end is in order to select arbitrary aforementioned resistor, when detecting arbitrary former electrodes, this resistor selector switch is connected to the other end of an aforementioned resistor, wherein the resistance value of this resistor is greater than the resistance value of this tested electrode, and when detecting any two former electrodes, this resistor selector switch is connected to the other end of another aforementioned resistor, and wherein the resistance value of this resistor is greater than the summation of these two tested electrode resistance value additions; And
One first operational amplifier, the non-inverting input of this first operational amplifier receives a reference voltage, and its reverse input end connection aforementioned nodes, and
When detecting arbitrary former electrodes, its output terminal is connected to the other end of the electrode that resistor connected that aforementioned resistor selector switch selects and when detecting any two former electrodes, its output terminal is connected to arbitrary end of the electrode that resistor was connected selected with aforementioned resistor selector switch electrode inequality, and this first operational amplifier is by detecting a resistance value in the tested electrode, and produces a sensing voltage according to this detected resistance value; And
One comparing unit comprises:
One second operational amplifier, the non-inverting input of this second operational amplifier receives aforementioned sensing voltage, and its reverse input end receives above-mentioned reference voltage, and relatively this sensing voltage and this reference voltage, to produce a comparative voltage; And
One Zener diode, the positive ending grounding of this Zener diode, and its negative terminal is connected with the output terminal of aforementioned second operational amplifier, and the Zener voltage of utilizing this Zener diode is as a predeterminated voltage;
Wherein, when tested arbitrary former electrodes open circuit or tested any two former electrodes between when not being short-circuited, aforementioned comparative voltage will be greater than aforementioned predeterminated voltage, then aforementioned comparing unit is exported this predeterminated voltage; When tested arbitrary former electrodes not do not open circuit or tested any two former electrodes between when being short-circuited, aforementioned comparative voltage will be less than aforementioned predeterminated voltage, then aforementioned comparing unit is exported this comparative voltage.
13. electrode inspector as claimed in claim 12, wherein aforementioned nodes is to utilize one first detector switch to connect an end of arbitrary former electrodes; And aforementioned first operational amplifier is the arbitrary end that utilizes one second detector switch to electrically connect the other end of the same electrode that is connected with this first detector switch or electrically connect the arbitrary electrode that is not connected with this first detector switch.
14. electrode inspector as claimed in claim 12, the reverse input end of wherein aforementioned second operational amplifier connects aforementioned nodes.
15. electrode inspector as claimed in claim 12 also comprises a flash-type A/D converter, is converted to a numerical data in order to comparative voltage or predeterminated voltage with aforementioned comparing unit output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610080244 CN101074977A (en) | 2006-05-15 | 2006-05-15 | Electrode inspector |
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| CN 200610080244 CN101074977A (en) | 2006-05-15 | 2006-05-15 | Electrode inspector |
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| CN101074977A true CN101074977A (en) | 2007-11-21 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104483550A (en) * | 2014-11-05 | 2015-04-01 | 南京华印半导体有限公司 | Method used for measuring resistance values of printed metal electrode |
| CN109341732A (en) * | 2018-11-23 | 2019-02-15 | 上海建工集团股份有限公司 | A kind of vibrating string type sensor parameter measurement circuit and method |
| CN112835243A (en) * | 2019-11-22 | 2021-05-25 | 北京开阳亮微科技有限公司 | Electrochromic device |
-
2006
- 2006-05-15 CN CN 200610080244 patent/CN101074977A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104483550A (en) * | 2014-11-05 | 2015-04-01 | 南京华印半导体有限公司 | Method used for measuring resistance values of printed metal electrode |
| CN104483550B (en) * | 2014-11-05 | 2017-06-16 | 南京华印半导体有限公司 | A kind of method for measuring type metal electrode resistance |
| CN109341732A (en) * | 2018-11-23 | 2019-02-15 | 上海建工集团股份有限公司 | A kind of vibrating string type sensor parameter measurement circuit and method |
| CN112835243A (en) * | 2019-11-22 | 2021-05-25 | 北京开阳亮微科技有限公司 | Electrochromic device |
| CN112835243B (en) * | 2019-11-22 | 2022-12-02 | 北京开阳亮微科技有限公司 | Electrochromic device |
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