CN106885995B - Test device and detection method - Google Patents
Test device and detection method Download PDFInfo
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- CN106885995B CN106885995B CN201710022100.8A CN201710022100A CN106885995B CN 106885995 B CN106885995 B CN 106885995B CN 201710022100 A CN201710022100 A CN 201710022100A CN 106885995 B CN106885995 B CN 106885995B
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- 238000012360 testing method Methods 0.000 title claims abstract description 110
- 238000001514 detection method Methods 0.000 title claims abstract description 14
- 239000004973 liquid crystal related substance Substances 0.000 claims description 5
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims 1
- 230000003287 optical effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 description 13
- 238000010586 diagram Methods 0.000 description 4
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- 239000002390 adhesive tape Substances 0.000 description 2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/44—Testing lamps
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Abstract
The invention discloses a kind of test device and detection methods, test device is used to provide test signal for module to be measured, module to be measured is with the first polar first input port and has the second polar second input port, test device includes: drive module, generates with the first polar first test signal and has the second polar second test signal；Control module, for generating control signal according to the first test signal；And relay, for providing the test signal to match with the polarity of the first input port of backlight module and the second input port for backlight module according to control signal.Test device and detection method disclosed by the invention, test device and the polar Auto-matching of module to be measured may be implemented, no matter whether the two connecting pin polarity matches, test operation can be normally completed, avoid in the prior art due to operator's connection error cause test device can not normal use, and thus bring working efficiency reduce the problem of.
Description
Technical field
The present invention relates to electronic circuit field more particularly to a kind of test devices and detection method.
Background technique
Currently, needing to examine the backlight module in liquid crystal display device in the production process of liquid crystal display device
It tests, mainly to test to LED (light emitting diode) electric light energization situation on backlight module, i.e., to detect lighting rate.
Existing detection method is using by hand by two of the golden finger in two electrodes of backlight lighting device and backlight module
Electrode is connected.But since two electrode tips of backlight lighting device generally manually add polarity mark, but due to operator
The problem of label or polarity mark mistake is forgotten in the carelessness of member often, although and two electrode tips of golden finger equally add
Added with electrode designations, but since two electrodes of two electrodes of backlight lighting device and golden finger being attached after, to prevent
Junction fracture, it will usually it is intertwined and connected place using adhesive tape, used adhesive tape often covers the electrode designations on golden finger,
Operator is affected to confirm electrode connection status.
If two electrodes of backlight lighting device and two polarity of electrode of golden finger are reversely connected, backlight module can not be normal
It is lit, to tester with big inconvenience, affects the working efficiency of tester.
Summary of the invention
In view of this, backlight may be implemented the purpose of the present invention is to provide a kind of test device and detection method
Polar Auto-matching between ignition device and backlight module.
According to the first aspect of the invention, a kind of test device is provided, for providing test signal, institute for module to be measured
Module to be measured is stated with the first polar first input port and there is the second polar second input port, comprising: driving mould
Block generates with the first polar first test signal and has the second polar second test signal；Control module is used for root
Control signal is generated according to the first test signal；And relay, for being the module to be measured according to the control signal
The test signal to match with the polarity of the first input port of the module to be measured and the second input port is provided.
Preferably, the drive module has power end, ground terminal, the first output end and second output terminal, the drive
The power end of dynamic model block receives first voltage, the ground terminal ground connection of the drive module, the first output end of the drive module
The first test signal of output and the second test signal are respectively used to second output terminal；
The relay have control signal, first input end, the second input terminal, third input terminal, the 4th input terminal,
First output end and second output terminal, the control signal of the relay is for receiving control signal, and the of the relay
One input terminal and the 4th input terminal are connected with the first output end of drive module, and the second input terminal and third of the relay are defeated
Enter end to be connected with the second output terminal of drive module, the first output end of the relay is used in the control signal be first
The first test of output signal when level, the second test of output signal, the relay when the control signal is second electrical level
Second output terminal be used for the second test of output signal when the control signal is the first level, be the in the control signal
The first test of output signal when two level.
Preferably, the control module includes: comparison module, for testing signal and first voltage comparison operation for first
Module carries out logical operation based on comparison result of the second voltage to comparison module to generate control signal.
Preferably, the comparison module includes: first resistor, and the first end of the first resistor is for receiving the first test
Signal；Second resistance, the first end ground connection of the second resistance, the of the second end of the second resistance and the first resistor
Two ends are connected；Comparator, the non-inverting input terminal of the comparator are connect with the second end of the second resistance, the comparator
Non-inverting input terminal receives first voltage.
Preferably, the computing module includes: and door, described with the first input end of door and the output end of the comparator
It is connected, it is described to be connected with the second input terminal of door with described with the output end of door；3rd resistor, the first end of the 3rd resistor
Second voltage is received, the second end of the 3rd resistor is connected with described with the second input terminal of door；And NOT gate, the NOT gate
It is connected with described with the output end of door, the output end of the NOT gate is for exporting control signal.
Preferably, first polarity is positive polarity, and the second polarity is negative polarity.
Preferably, the second voltage is 3.3V.
Preferably, the module to be measured includes the backlight module of liquid crystal display device, the first test signal and second
Test the point modulating signal that signal is backlight module.
According to the second aspect of the invention, a kind of detection method is provided, comprising: generating has the first polar first test
Signal and have second it is polar second test signal；Control signal is generated according to the first test signal；And using after
Electric appliance is provided for the module to be measured according to the control signal and is inputted with the first input port of the module to be measured and second
The test signal that the polarity of port matches.
Preferably, it includes: to test signal compared with first voltage for first that the first test signal, which generates control signal,；
Logical operation is carried out based on comparison result of the second voltage to comparison module to generate control signal.
Test device and detection method according to an embodiment of the present invention, may be implemented test device and module to be measured is polar
Auto-matching, when connecting with module to be measured, no matter whether the two connecting pin polarity is matched, and can normally complete test behaviour
Make, avoid in the prior art due to operator's connection error cause test device can not normal use, and thus bring
Working efficiency reduce the problem of.
Detailed description of the invention
By referring to the drawings to the description of inventive embodiments, above-mentioned and other purposes of the invention, feature and excellent
Point will be apparent from, in the accompanying drawings:
Fig. 1 shows the structure chart of the test device of first embodiment of the invention offer；
The equivalent circuit diagram of control module in the test device provided Fig. 2 shows first embodiment of the invention；
Fig. 3 shows the display situation of oscillograph in Fig. 2.
Specific embodiment
Below based on embodiment, present invention is described, but the present invention is not restricted to these embodiments.Under
Text is detailed to describe some specific detail sections in the datail description of the embodiment of the present invention, comes to those skilled in the art
Say that the present invention can also be understood completely in the description of part without these details.It is well known in order to avoid obscuring essence of the invention
Method, process, process do not describe in detail.
In various figures, identical element, which is adopted, will be referred to by like reference numbers expression.For the sake of clarity, in attached drawing
Various pieces are not necessarily to scale.In addition, certain well known parts may be not shown in figure.Flow chart, frame in attached drawing
Figure illustrates the system, method, possible System Framework, the function and operation of circuit of the embodiment of the present invention, the box of attached drawing
And box sequence is used only to the process and step of better illustrated embodiment, without should be in this, as to inventing limit itself
System.
Fig. 1 shows the structure chart of the test device of first embodiment of the invention offer.As shown in Figure 1, the present invention first
The test device that embodiment provides includes control module 100, drive module 200 and relay 300, the drive module 200
For generating with the first polar first test signal A and there is the second polar second test signal K；The control module
100 for generating control signal CONTROL according to the first test signal；The relay 300 is used for according to the control
Signal CONTROL provides the first input port BL_A and the second input port with the module to be measured for the module to be measured
The test signal that the polarity of BL_K matches, the relay 300 for example, two channel relay, the first of the module to be measured
Input port B L_A has the first polarity, and the second input port B L_K of the module to be measured has the second polarity, described to be measured
Module includes the backlight module of liquid crystal display device, and the first test signal A and the second test signal K are, for example, backlight module
Point modulating signal, first polarity be, for example, anode, second polarity is, for example, cathode.
Fig. 1 (a) shows the structure chart of control module in the test device of first embodiment of the invention offer.Such as Fig. 1 (a)
Shown, the control module 100 includes comparison module 110 and computing module 120, and the comparison module 110 includes first resistor
R1, second resistance R2 and comparator U1, the computing module 120 include 3rd resistor R3 and door U2 and NOT gate U3.
The first end of the first resistor R1 is for receiving the first test signal A；The first termination of the second resistance R2
Ground, the second end of the second resistance R2 are connected with the second end of the first resistor R1；The homophase input of the comparator U1
End is connect with the second end of the second resistance R2, and the non-inverting input terminal of the comparator U1 receives first voltage VCC1, described
The power end of comparator U1 receives second voltage VCC2, the ground terminal ground connection of the comparator U1；It is described first defeated with door U2
Enter end to be connected with the output end of the comparator U1；The first end of the 3rd resistor R3 receives second voltage VCC2, and described the
The second end of three resistance R3 is connected to second input terminal and output end with door U2 simultaneously；The NOT gate U3 and described and door
The output end of U2 is connected, and the output end of the NOT gate U3 is for exporting control signal CONTROL.
That the first voltage VCC1 is, for example, 2.5V；The second voltage VCC2 is, for example, 3.3V；The first resistor
R1 is, for example, the R0603 type resistance of resistance value 50K Ω, error 5%；The second resistance R2 is, for example, resistance value 10K Ω, error 5%
R0603 type resistance；The 3rd resistor R3 is, for example, the R0603 type resistance of resistance value 10K Ω, error 5%.
Fig. 1 (b) shows the structure chart of drive module in the test device of first embodiment of the invention offer.Such as Fig. 1 (b) institute
Show, the drive module 200 has power end A0, ground terminal A1, the first output terminals A 2 and second output terminal A3.The driving
The power end A0 of module receives supply voltage VIN, and the supply voltage VIN is, for example, 12V, the ground terminal A1 ground connection.It is described
First output terminals A 2 and second output terminal A3 are respectively used to the first test signal A of output and the second test signal K.
Fig. 1 (c) shows the structure chart of relay in the test device of first embodiment of the invention offer.Such as Fig. 1 (c) institute
Show, the relay has control signal A5, first input end K11, the second input terminal K12, third input terminal K21, the 4th
Input terminal K22, the first output end C1, second output terminal C2 and power end A4.
Wherein, the first input end K11 of the relay 300 is for receiving the first test signal A, the relay 300
The second input terminal K12 for receive second test signal K, the first output end C1 and first input end of the relay 300
The first normally-closed contact is constituted between K11, and is constituted between the first output end C1 and the second input terminal K12 of the relay 300
One normally opened contact, the third input terminal K21 of the relay 300 test signal K for receiving second, the relay 300
4th input terminal K22 for receive the first test signal A, the second output terminal C2 and third input terminal of the relay 300 it
Between K21 constitute the second normally-closed contact, constitute second between the second output terminal C2 and the 4th input terminal K22 of the relay 300
Normally opened contact, the power end A4 is for receiving second voltage VCC2, and the control signal A5 is for receiving the control mould
The control signal CONTROL that block provides.The the first output end C1 and second output terminal C2 of the relay 300 be used for it is described to
Module connection is surveyed, for providing test signal for the module to be measured.With described previously, the second voltage VCC2 is, for example,
3.3V。
The relay 300 further includes coil (not shown), when the coil not it is electric when, the relay 300
The first normally-closed contact closure, first normally opened contact disconnects, the first output end C1 and the first input end K11 phase
Connection；The second normally-closed contact closure, second normally opened contact disconnect, the second output terminal C2 and third input
End K21 is connected.
For the ease of better implementing the present invention, second embodiment of the invention provides a kind of detection method.Wherein noun
Meaning is identical with above-mentioned test device, and specific implementation details can refer to the explanation in test device embodiment.
When starting detection, if the first output end C1 of the relay 300 is connected to the first input port of module to be measured
BL_A, and the second output terminal C2 of the relay 300 is connected to the second output terminal mouth of module to be measured, due to connecting pin polarity
Match, the drive module 100 by supply voltage VIN it is boosted after exported by first output terminals A 2, had
First test signal A of certain level value, the level value of the first test signal A is, for example, 21V~24V.
The comparator U1 non-inverting input terminal voltage is higher than the comparator U1 inverting input terminal voltage, the comparator U1
Output is high level.At this point, output end of the first input end with door U2 due to being connected to the comparator U1, it is described with
The first input end of door U2 is high level.Those skilled in the art it should be clear that it is described with door U2 under current connection relationship,
When the first input end with door U2 is high level, described and door U2 output end is also high level.Accordingly, described non-
The input terminal of door U3 is high level, and the output end of the NOT gate U3 exports low level control signal CONTROL.
Due to the relay 300 coil not it is electric when, the relay 300 the first normally-closed contact closure, institute
The disconnection of the first normally opened contact is stated, the first output end C1 is connected with the first input end K11；Second normally-closed contact
Closure, second normally opened contact disconnect, and the second output terminal C2 is connected with the third input terminal K21.
At this point, the relay 300 receives the low level control signal CONTROL, so that the relay 300
One normally-closed contact, the first normally opened contact, the second normally-closed contact and the second normally opened contact continue to keep when 300 coil of relay
State when must not be electric, the first output end C1 are connected with the first input end K11, receive and export with positive polarity
The first test signal A, the second output terminal C2 is connected with the third input terminal K21, receives and export with cathode
Property the second test signal K, the test device correctly matches with the module to be measured, can be normally carried out test operation.
If the first output end C1 of the relay 300 is connected to the second input port B L_K of module to be measured, and described
The second output terminal C2 of relay 300 is connected to the first output port of module to be measured, since connecting pin polarity does not match that, institute
Drive module 100 is stated without boosting, the supply voltage VIN is directly exported through first output terminals A 2, obtains first
Signal A is tested, the level value of the first test signal A and the level value of supply voltage VIN are mutually all 12V.
The comparator U1 non-inverting input terminal voltage is lower than the comparator U1 inverting input terminal voltage, the comparator U1
Output is low level.Described and output end of the door U2 first input end due to being connected to the comparator U1, the comparator U1
First input end be low level, it is described it is same with door U2 first input end also be low level, the logical relation of You Yumen U2 can
Know, the output end with door U2 is necessarily also low level.Described and door is connected to door U2 the second input terminal due to described
The output end of U2, it is described to be pulled to low level with door U2 the second input terminal voltage.Accordingly, the input terminal of the NOT gate U3 is
Low level, the control signal CONTROL of the output end output high level of the NOT gate U3.
Due to the relay 300 coil not it is electric when, the relay 300 the first normally-closed contact closure, institute
The disconnection of the first normally opened contact is stated, the first output end C1 is connected with the first input end K11；Second normally-closed contact
Closure, second normally opened contact disconnect, and the second output terminal C2 is connected with the third input terminal K21.
At this point, the relay 300 receives the control signal CONTROL of the high level, make first normally-closed contact
It disconnects, first normally opened contact closure, the relay 300 has the of negative polarity via the first output end C1 output
Two test signal K；Second normally-closed contact disconnects, and the second normally opened contact closure, the relay is via described second
Output end C2 output has the first test signal A of positive polarity, and the test device is correctly matched with the module to be measured, can be just
Often complete lighting operation.
The equivalent circuit diagram of control module in the test device provided Fig. 2 shows first embodiment of the invention.Such as Fig. 2 institute
Showing, the output end Q of the waveform generator U4 in equivalent circuit diagram corresponds to the output end of comparator U1 in control module in Fig. 1,
The square wave of the waveform generator U4 such as output frequency 5Hz, duty ratio 50%.The output of the waveform generator U4 and Fig. 1
Middle comparator U1 output is equivalent when being high level.
Fig. 3 shows the display situation of oscillograph in Fig. 2.As shown in figure 3, showing NOT gate U3 in Fig. 2 in waveform diagram
Output waveform, it can be seen from the figure that being high level when comparator U1 is exported in Fig. 2, the output of the NOT gate U3 is persistently kept
For high level, the Theoretical Proof process of experimental verification above is thus used.
Compared with the existing technology, test device and detection method provided by the invention, since the test device can be real
Existing polar Auto-matching, when connecting with module to be measured, no matter whether the two connecting pin polarity is matched, and is mentioned through the invention
The detection method of confession can normally complete test operation, avoid in the prior art since operator's connection error causes to survey
Trial assembly set can not normal use, and thus bring working efficiency reduce the problem of.
It should be noted that herein, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
It is as described above according to the embodiment of the present invention, these embodiments details all there is no detailed descriptionthe, also not
Limiting the invention is only the specific embodiment.Obviously, as described above, can make many modifications and variations.This explanation
These embodiments are chosen and specifically described to book, is principle and practical application in order to better explain the present invention, thus belonging to making
Technical field technical staff can be used using modification of the invention and on the basis of the present invention well.
Claims (9)
1. a kind of test device, for providing test signal for module to be measured, the module to be measured has first polar first
Input port and have the second polar second input port characterized by comprising
Drive module generates with the first polar first test signal and has the second polar second test signal；
The drive module includes the first output end and second output terminal, first output end of the drive module and described
Second output terminal is respectively used to export the first test signal and the second test signal；
Control module, for generating control signal according to the first test signal；And
Relay, for being provided and the first input port of the module to be measured and according to the control signal for module to be measured
The test signal that the polarity of two input ports matches；
The relay includes control signal, the first output end and second output terminal, the control input of the relay
End is used for defeated when the control signal is the first level for receiving the control signal, the first output end of the relay
First test signal out, when the control signal is second electrical level, the second test of output signal, the second of the relay are defeated
Outlet is used for the second test of output signal when the control signal is the first level, when the control signal is second electrical level
Output the first test signal.
2. test device according to claim 1, which is characterized in that
The drive module further includes power end, ground terminal, and the power end of the drive module receives first voltage, described
The ground terminal of drive module is grounded；
The relay further includes first input end, the second input terminal, third input terminal, the 4th input terminal, the relay
First input end and the 4th input terminal are connected with the first output end of drive module, the second input terminal and third of the relay
Input terminal is connected with the second output terminal of drive module.
3. test device according to claim 1, which is characterized in that the control module includes:
Comparison module, for testing signal compared with first voltage for first；
Computing module carries out logical operation based on comparison result of the second voltage to comparison module to generate control signal.
4. test device according to claim 3, which is characterized in that the comparison module includes:
First resistor, the first end of the first resistor is for receiving the first test signal；
Second resistance, the first end ground connection of the second resistance, the of the second end of the second resistance and the first resistor
Two ends are connected；
Comparator, the non-inverting input terminal of the comparator are connect with the second end of the second resistance, the same phase of the comparator
Input terminal receives first voltage.
5. test device according to claim 4, which is characterized in that the computing module includes:
It is described to be connected with the first input end of door with the output end of the comparator with door, second input terminal with door with
It is described to be connected with the output end of door；
The first end of 3rd resistor, the 3rd resistor receives second voltage, the second end of the 3rd resistor and described and door
The second input terminal be connected；And
NOT gate, the NOT gate are connected with described with the output end of door, and the output end of the NOT gate is for exporting control signal.
6. test device according to claim 1, which is characterized in that first polarity is positive polarity, and the second polarity is
Negative polarity.
7. test device according to claim 3, which is characterized in that the second voltage is 3.3V.
8. test device according to claim 1, which is characterized in that the module to be measured includes the back of liquid crystal display device
Optical module, the first test signal and the second test signal are the point modulating signal of backlight module.
9. a kind of detection method characterized by comprising
It generates with the first polar first test signal and there is the second polar second test signal；
Control signal is generated according to the first test signal；And
It is provided and the first input port of the module to be measured and according to the control signal for module to be measured using relay
The test signal that the polarity of two input ports matches；
Wherein, described to include: according to the first test signal generation control signal
By the first test signal compared with first voltage；
Logical operation is carried out based on comparison result of the second voltage to comparison module to generate the control signal.
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| CN201710022100.8A CN106885995B (en) | 2017-01-12 | 2017-01-12 | Test device and detection method |
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|---|---|---|---|
| CN201710022100.8A CN106885995B (en) | 2017-01-12 | 2017-01-12 | Test device and detection method |
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| CN106885995B true CN106885995B (en) | 2019-11-19 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020042906A1 (en) | 2018-08-31 | 2020-03-05 | Changxin Memory Technologies, Inc. | Test methods, tester, load board and test system |
| CN108732489B (en) * | 2018-08-31 | 2023-09-05 | 长鑫存储技术有限公司 | Test method, test equipment, test carrier plate and test system |
| CN109655682B (en) * | 2018-11-07 | 2021-09-24 | 广东核电合营有限公司 | On-site automatic test circuit and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000058278A (en) * | 1998-08-04 | 2000-02-25 | Canon Inc | Backlight device |
| CN103943087A (en) * | 2014-04-04 | 2014-07-23 | 京东方科技集团股份有限公司 | Drive circuit of displayer and display device |
| CN104053281A (en) * | 2014-06-16 | 2014-09-17 | 京东方光科技有限公司 | Lighting jig |
| CN105096859A (en) * | 2015-07-29 | 2015-11-25 | 深圳市华星光电技术有限公司 | Driving method and apparatus of LCD |
| CN205015449U (en) * | 2015-09-30 | 2016-02-03 | 深圳Tcl数字技术有限公司 | Be shaded and adjust test system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070216232A1 (en) * | 2006-03-14 | 2007-09-20 | Li Feng | Multi-functional safety power supply switch of touch screen type |
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2017
- 2017-01-12 CN CN201710022100.8A patent/CN106885995B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000058278A (en) * | 1998-08-04 | 2000-02-25 | Canon Inc | Backlight device |
| CN103943087A (en) * | 2014-04-04 | 2014-07-23 | 京东方科技集团股份有限公司 | Drive circuit of displayer and display device |
| CN104053281A (en) * | 2014-06-16 | 2014-09-17 | 京东方光科技有限公司 | Lighting jig |
| CN105096859A (en) * | 2015-07-29 | 2015-11-25 | 深圳市华星光电技术有限公司 | Driving method and apparatus of LCD |
| CN205015449U (en) * | 2015-09-30 | 2016-02-03 | 深圳Tcl数字技术有限公司 | Be shaded and adjust test system |
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| CN106885995A (en) | 2017-06-23 |
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