CN106443192A - Detection device and detection method for binding impedance of display screen - Google Patents

Detection device and detection method for binding impedance of display screen Download PDF

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Publication number
CN106443192A
CN106443192A CN201610985070.6A CN201610985070A CN106443192A CN 106443192 A CN106443192 A CN 106443192A CN 201610985070 A CN201610985070 A CN 201610985070A CN 106443192 A CN106443192 A CN 106443192A
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CN
China
Prior art keywords
impedance
processing module
signal processing
test port
display screen
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610985070.6A
Other languages
Chinese (zh)
Inventor
陈心全
宫彩凤
朱修剑
葛明伟
吉豪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kunshan Govisionox Optoelectronics Co Ltd
Kunshan Guoxian Photoelectric Co Ltd
Original Assignee
Kunshan Guoxian Photoelectric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kunshan Guoxian Photoelectric Co Ltd filed Critical Kunshan Guoxian Photoelectric Co Ltd
Priority to CN201610985070.6A priority Critical patent/CN106443192A/en
Publication of CN106443192A publication Critical patent/CN106443192A/en
Pending legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/16Measuring impedance of element or network through which a current is passing from another source, e.g. cable, power line

Abstract

The invention discloses a detection device and a detection method for binding impedance of a display screen. The device comprises test ports, an impedance test circuit and a signal processing module, wherein the test ports are preset at the binding end of a screen body; the number of the test ports is greater than or equal to three; the impedance test circuit is connected with the test ports and the signal processing module; impedance among the test ports is converted into an electrical signal, and the electrical signal is transmitted to the signal processing module; the signal processing module receives the electrical signal, and whether the binding impedance is uniform or not is judged according to the electrical signal. By using the device and the method disclosed by the invention, the impedances at all the positions can be automatically detected and compared, and further whether the binding impedance is uniform or not is judged. Compared with a method for manually testing the binding impedance in the prior art, the detection method disclosed by the invention has the advantages that a large amount of human and material resources are saved, and the binding output yield is also improved.

Description

A kind of display screen binds impedance detection apparatus and method
Technical field
The application is related to electronic device field, more particularly to the binding impedance detection method of a kind of electronic equipment display screen and Device.
Background technology
With expanding economy, various electronic equipments are increasingly common in life.Most of electronic equipments can all be furnished with Display screen, such as mobile phone screen, display, electronic bill-board etc..In order to obtain more preferable display effect, to the performance of display screen and The requirement of quality also more and more higher.
The material used by display screen is to determine the performance of display screen and the key factor of quality, conventional display screen material There are liquid crystal, glass etc..In recent years, occur in that a kind of using active-matrix organic light emitting diode (Active-matrix Organic light emitting diode, abbreviation AMOLED) as material display screen, referred to as AMOLED display screen.By Have the advantages that response speed is very fast, contrast is higher, visual angle is wider in AMOLED display screen, obtaining more and more extensive Application.
The AMOLED display module used by AMOLED display screen is by AMOLED display screen body, drive integrated circult (Integrated Circuit, abbreviation IC) and module flexible PCB (Flexible Printed Circuit, abbreviation FPC) Constitute, wherein drive IC and FPC with screen body connected mode have mainly have chip be located at glass on (Chip On Glass, referred to as COG), chip is located at (Chip On FPC, abbreviation COF) and flexible PCB on flexible PCB and is located at (FPC On on glass Glass, abbreviation FOG) three kinds.These three connected modes are realized by binding (Bonding) technique, using bonding Technique can be realized shielding body and low-impedance electric connection between IC and FPC.
If however, bonding is bad, it is excessive to be possible to impedance between screen body and IC, screen body and FPC, causes to shield body picture Face shows abnormal.This problem is especially prominent in the IC being connected to using COG mode on screen body.The size of current COG IC is not Disconnected increase, the pressure of bonding technique is difficult to control, and causes module bonding bad, thus causes bonding impedance inequality Even, so as to easily cause bonding impedance excessive, cause picture to show further abnormal.
Experiment finds, bonding impedance is excessive, and AMOLED display screen picture can be caused the pictures such as glimmer line, bright line occur Abnormal phenomena, has had a strong impact on the display quality of picture and the yield of output module.
In the prior art, production line test bonding impedance is all by the way of manual test, and manual test is not only difficult Degree is big, and efficiency is low, and the error in data that tests is larger, when needing a large amount of statistical datas, then need to put into more manpowers and Equipment, causes serious cost pressure.
Content of the invention
In view of this, the invention provides a kind of display screen binding impedance detection apparatus and method, which can be fast automatic Detect and compare the impedance for binding each position, when the impedance differences of diverse location exceed preset value, judge binding impedance inequality Even, the method that middle manual test binds impedance compared to existing technology, save a large amount of manpower and materials.
The embodiment of the present application provides a kind of display screen and binds impedance detection device, including:
The test port that screen body binds end is preset in, the test port quantity is more than or equal to three;
Testing impedance circuit;
Signal processing module;
Wherein,
Testing impedance circuit connects the test port and the signal processing module, and by between the test port Impedance conversion is the signal of telecommunication and sends it to the signal processing module;
Signal processing module receives the signal of telecommunication, and judges whether binding impedance is uniform according to the signal of telecommunication.
Preferably, the testing impedance circuit includes:
Current source, the current source connects the test port;
Voltage tester end, the voltage tester end connects the test port, and tests the test port voltage, by institute State voltage to send to signal processing module;
Preferably, the testing impedance circuit includes switch-mode metal-oxide semiconductor field effect transistor, the switch Break-make and current source that Metal-Oxide Semiconductor field-effect transistor control voltage test lead is connected with test port The break-make being connected with test port.
Preferably, the signal processing module compare voltage that the different test ports of testing impedance circuit connection are obtained it Between difference, when the difference more than preset value when, judge binding impedance uneven.
Preferably, the current source is constant-current source.
Preferably, the test port is uniformly distributed in screen body binding end.
Preferably, the display screen is active matrix/organic light emitting diode (AMOLED) display screen.
Preferably, display screen binding impedance detection device also includes analog-to-digital conversion device, for by testing impedance circuit The signal of telecommunication of transmission is converted into digital signal and is sent to signal processing module.
The embodiment of the present application also provides a kind of display screen binding impedance detection method, including:
Test port is preset at screen body binding end, the test port quantity is more than or equal to three;
Using the impedance described in testing impedance circuit test between test port, and impedance test results are converted into telecommunications Number, send it to signal processing module;
The signal of telecommunication is received using signal processing module, and judge whether binding impedance is uniform according to the signal of telecommunication.
Presetting test port by end being bound in screen body, coordinates impedance measuring circuit and signal processing module, can be quick Measurement many places binding resistance, and it is uniform to judge whether binding according to the difference between binding resistance.This process is without the need for people Work operate, substantial amounts of saved human cost, also improve binding output yield.
Description of the drawings
Accompanying drawing described herein is used for providing further understanding of the present application, constitutes the part of the application, this Shen Schematic description and description please is used for explaining the application, does not constitute the improper restriction to the application.In the accompanying drawings:
Fig. 1 is the application first embodiment schematic device;
Fig. 2 is one middle impedance test circuit schematic diagram of embodiment;
Fig. 3 is method flow schematic diagram in embodiment two.
Specific embodiment
Purpose, technical scheme and advantage for making the application is clearer, below in conjunction with the application specific embodiment and Corresponding accompanying drawing is clearly and completely described to technical scheme.Obviously, described embodiment is only the application one Section Example, rather than whole embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not doing The every other embodiment for being obtained under the premise of going out creative work, belongs to the scope of the application protection.
Below in conjunction with accompanying drawing, the technical scheme that each embodiment of the application is provided is described in detail.
Embodiment 1
Fig. 1 is the schematic diagram of the present embodiment device.As shown in figure 1, the device includes:
Test port.Test port is preset in screen body binding end, and the impedance between two test ports is exactly two Binding impedance between test port.Test port is preferably evenly distributed through screen body binding end, adjacent two test port groups Test port in a pair;When binding impedance and being uniform, it is also uniform per the impedance between a pair of test port.
Due to impedance to be compared, three test ports are at least needed, could provide at least two impedance test results is used for Relatively.
The device also includes:
Testing impedance circuit.Testing impedance circuit is used for the impedance that tests between test port, and the impedance conversion is The signal of telecommunication simultaneously sends it to the signal processing module.
One typical testing impedance circuit is as shown in Fig. 2 including current source, voltage tester end and switch-mode metal-oxidation Thing semiconductor field effect transistor (Metal Oxide Semiconductor Filed Effect Transistor, referred to as MOSFET).The connection of the connection of switch MOSFET control electric current source and impedance Z to be measured and voltage tester end and impedance Z to be measured, its That middle control electric current source is connected with impedance Z to be measured is M1, M2, what control voltage test lead was connected with impedance Z to be measured be M3, M4, the impedance Z for noting here is the equiva lent impedance between two test ports.Control signal (Ctrl) control M1, M2, M3, The open and close of this four switch MOSFET of M4.When MOSFET unlatching is switched, the electric current that current source is provided passes through impedance Z, A voltage U0, the voltage U0 of voltage tester end Impedance measurement Z is produced, and the voltage is sent to signal processing module.
Obviously, according to U0, and the size of current that current source is provided, the size of impedance Z can be obtained according to Ohm's law.
Preferably, current source can be set to constant-current source.Due to constant-current source provide electric current be known and constant, Convenient during computing impedance Z.
The device also includes:
Signal processing module.Signal processing module receives the signal of telecommunication that testing impedance circuit sends, and according to the telecommunications Whether uniform number judge to bind impedance.
In the present embodiment, what testing impedance circuit sent is voltage signal, and signal processing module is by the voltage divided by electricity The electric current that stream source provides, it is possible to draw the impedance between corresponding test port.A resistance can all be provided per a pair of test port Anti- value, signal processing module compares these resistance values, if the difference between resistance value is more than preset value, then it is assumed that binding impedance Uneven.
As the voltage signal that the present embodiment middle impedance test circuit sends is a kind of analogue signal, this signal is not easy to Numerical operation is carried out, when comparing resistance value so as to signal processing module, can be relatively difficult.So as to, it is preferred that in the present embodiment In, analog-digital converter can be increased, the voltage signal for sending testing impedance circuit is converted into digital signal and is sent to Signal processing module.According to these digital signals, signal processing module judges whether binding impedance is uniform.
Method by using proposing in the present embodiment, can quickly test and compare the binding impedance of diverse location, Find to bind the uneven display screen module of impedance so as to rapid.Also, this process is without the need for manual hand manipulation, low cost Honest and clean.
Embodiment 2
Based on above-mentioned labor, embodiment of the present invention also proposed a kind of display screen binding impedance detection method as schemed Shown in 3, the method includes:
Test port is preset at screen body binding end, the test port quantity is more than or equal to three (steps S1);
Using the impedance described in testing impedance circuit test between test port, and impedance test results are converted into telecommunications Number, send it to signal processing module (step S2);
The signal of telecommunication is received using signal processing module, and judge whether binding impedance is uniform according to the signal of telecommunication (step S3).
Preferably, in the present embodiment, the impedance with the following method to test between the test port is made, and impedance is surveyed Test result is converted into the signal of telecommunication, sends it to signal processing module:
Current source is provided, the current source connects the test port;
Voltage tester end is provided, the voltage tester end connects the test port, and the test port voltage is tested, The voltage is sent to signal processing module.
Preferably, in the present embodiment, make with the following method receiving the signal of telecommunication, and judge to tie up according to the signal of telecommunication Whether constant impedance is uniform:
Compared between the voltage obtained by the different test ports of testing impedance circuit connection using the signal processing module Difference, when the difference more than preset value when, judge binding impedance uneven.
Presetting test port by end being bound in screen body, can quickly and easily test test port with testing impedance circuit Between binding impedance, and judge whether impedance uniform using signal processing module.This process is without the need for manual operations.

Claims (10)

1. a kind of display screen binds impedance detection device, it is characterised in that the device includes:
The test port that screen body binds end is preset in, the test port quantity is more than or equal to three;
Testing impedance circuit;
Signal processing module;
Wherein,
Testing impedance circuit connects the test port and the signal processing module, and the impedance between the test port is turned Turn to the signal of telecommunication and send it to the signal processing module;
Signal processing module receives the signal of telecommunication, and judges whether binding impedance is uniform according to the signal of telecommunication.
2. display screen as claimed in claim 1 binds impedance detection device, it is characterised in that the testing impedance circuit bag Include:
Current source, the current source connects the test port;
Voltage tester end, the voltage tester end connects the test port, and tests the test port voltage, by the electricity Signal processing module is delivered in pressure.
3. display screen as claimed in claim 2 binds impedance detection device, it is characterised in that the testing impedance circuit includes Switch-mode metal-oxide semiconductor field effect transistor, the switch-mode metal-oxide semiconductor field effect transistor control electricity The break-make that pressure test lead is connected with test port and the break-make that current source is connected with test port.
4. display screen as claimed in claim 2 binds impedance detection device, it is characterised in that the signal processing module compares The voltage obtained by the different test ports of testing impedance circuit connection, when the difference between the voltage is more than preset value, sentences Surely binding impedance is uneven.
5. display screen as claimed in claim 2 binds impedance detection device, it is characterised in that the current source is constant-current source.
6. display screen as claimed in claim 1 binds impedance detection device, it is characterised in that the test port is uniformly distributed End is bound in the screen body.
7. display screen as claimed in claim 1 binds impedance detection device, it is characterised in that the display screen is active-matrix Organic light emitting diode display screen.
8. display screen as claimed in claim 1 binds impedance detection device, it is characterised in that also include analog-to-digital conversion device, uses It is converted into digital signal and is sent to signal processing module in the signal of telecommunication for sending testing impedance circuit.
9. a kind of display screen binds impedance detection method, it is characterised in that the method includes:
Test port is preset at screen body binding end, the test port quantity is more than or equal to three;
Using the impedance described in testing impedance circuit test between test port, and impedance test results are converted into the signal of telecommunication send out Deliver to signal processing module;
The signal of telecommunication is received using signal processing module, and judge whether binding impedance is uniform according to the signal of telecommunication.
10. display screen as claimed in claim 9 binds impedance detection method, it is characterised in that
Impedance described in the use testing impedance circuit test between test port, and impedance test results are converted into telecommunications Number, signal processing module is sent it to, including:
Current source is provided, the current source connects the test port;
Voltage tester end is provided, the voltage tester end connects the test port, and the test port voltage is tested, by institute State voltage to send to signal processing module;
The use signal processing module receives the signal of telecommunication, and judges whether uniformly to bind impedance according to the signal of telecommunication, Including:
Compare the difference between the voltage obtained by the different test ports of testing impedance circuit connection using the signal processing module Value, when the difference is more than preset value, judges that binding impedance is uneven.
CN201610985070.6A 2016-10-31 2016-10-31 Detection device and detection method for binding impedance of display screen Pending CN106443192A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Publication Number Publication Date
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Cited By (8)

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CN106932643A (en) * 2017-03-30 2017-07-07 深圳市立德通讯器材有限公司 A kind of binding effect detection device and detection method for AMOLED products
CN107610625A (en) * 2017-08-31 2018-01-19 昆山国显光电有限公司 Bind impedance test device and binding impedance detecting method
CN107656191A (en) * 2017-09-25 2018-02-02 京东方科技集团股份有限公司 This pressure condition detection components, system and method
CN108519515A (en) * 2018-03-30 2018-09-11 蚌埠国显科技有限公司 Impedance detection device after a kind of LCD points silver paste
CN108828391A (en) * 2018-07-04 2018-11-16 京东方科技集团股份有限公司 The binding detection device of display device
CN110618088A (en) * 2019-08-12 2019-12-27 中车青岛四方机车车辆股份有限公司 Metal material surface passive film testing device
CN112782238A (en) * 2021-01-18 2021-05-11 Oppo广东移动通信有限公司 Binding exception testing and repairing method and device, electronic equipment and storage medium
CN113516934A (en) * 2021-03-17 2021-10-19 合肥维信诺科技有限公司 Screen body, circuit board and display device

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CN106932643A (en) * 2017-03-30 2017-07-07 深圳市立德通讯器材有限公司 A kind of binding effect detection device and detection method for AMOLED products
CN107610625A (en) * 2017-08-31 2018-01-19 昆山国显光电有限公司 Bind impedance test device and binding impedance detecting method
CN107610625B (en) * 2017-08-31 2020-10-27 昆山国显光电有限公司 Bound impedance testing device and bound impedance testing method
CN107656191B (en) * 2017-09-25 2020-07-21 京东方科技集团股份有限公司 Local pressure state detection assembly, system and method
CN107656191A (en) * 2017-09-25 2018-02-02 京东方科技集团股份有限公司 This pressure condition detection components, system and method
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CN108828391A (en) * 2018-07-04 2018-11-16 京东方科技集团股份有限公司 The binding detection device of display device
CN108828391B (en) * 2018-07-04 2020-12-08 京东方科技集团股份有限公司 Binding detection device of display device
CN110618088A (en) * 2019-08-12 2019-12-27 中车青岛四方机车车辆股份有限公司 Metal material surface passive film testing device
CN110618088B (en) * 2019-08-12 2021-11-12 中车青岛四方机车车辆股份有限公司 Metal material surface passive film testing device
CN112782238A (en) * 2021-01-18 2021-05-11 Oppo广东移动通信有限公司 Binding exception testing and repairing method and device, electronic equipment and storage medium
CN113516934A (en) * 2021-03-17 2021-10-19 合肥维信诺科技有限公司 Screen body, circuit board and display device
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Application publication date: 20170222