CN207742278U - A kind of test circuit - Google Patents
A kind of test circuit Download PDFInfo
- Publication number
- CN207742278U CN207742278U CN201721726710.8U CN201721726710U CN207742278U CN 207742278 U CN207742278 U CN 207742278U CN 201721726710 U CN201721726710 U CN 201721726710U CN 207742278 U CN207742278 U CN 207742278U
- Authority
- CN
- China
- Prior art keywords
- module
- alarm
- high level
- triggering
- resistance
- 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.)
- Active
Links
Landscapes
- Fire Alarms (AREA)
Abstract
The utility model discloses a kind of test circuits, are used for test touch screen identification circuit, test circuit includes high level detection module, boost module, division module, alarm triggering module and alarm module；The input terminal of high level detection module is for being connected to the first end to be checked, the output end of high level detection module is connected to the input terminal of boost module, the output end of boost module is connected to the input terminal of division module, the output end of division module is connected to the first triggering end of alarm triggering module, and the output end of alarm triggering module is connected to alarm module.It can the triggering alarm module alarm in the first identification resistive-open；Circuit structure is simpler, at low cost, and reliability is higher, versatile；The touch screen outflow that can effectively prevent from identifying resistance rosin joint, dry joint, setting up a monument etc. failure weldings, there is extraordinary using effect in the actual production process.
Description
Technical field
The utility model is related to touch screen field more particularly to a kind of test circuits, are used for test touch screen identification circuit.
Background technology
Currently, being directed to using the design scheme of touch control display device and in actual product production process can consider
Different material type selectings, compatibility are the major issues to be considered during selecting material type.And touch screen conduct
Human-computer interaction interface product in one, with a type within the entire product life cycle exist using different touch screens can
Energy.Major part complete machine manufacturer has many different touch screen suppliers at present, and client needs to identify by TP_ID different
The product of supplier.
The identification circuit of general touch screen is the empty pad locations for increasing by two configuration different voltages, will support the electricity of VC C
Resistance is in parallel with ground resistance to solve the problems, such as that product vendor cannot be distinguished in client.
But since resistance such as will appear rosin joint, dry joint, set up a monument at the failure weldings in actual production process, and test software can not
Test this partial circuit.TP-ID can be caused to identify mistake if any above-mentioned exception occurs.
Utility model content
For overcome the deficiencies in the prior art, the purpose of this utility model is to provide a kind of test circuits, for testing
Touch screen identification circuit；It triggering alarm module can alarm in the first identification resistive-open, can effectively prevent identification resistance
Rosin joint, dry joint, the touch screen outflow for the failure weldings such as set up a monument.
The purpose of this utility model adopts the following technical scheme that realization：
A kind of test circuit is used for test touch screen identification circuit, which includes the first identification resistance,
One end of first identification resistance is connected to the first high level, and the other end is the first end to be checked；The test circuit includes high level
Detection module, boost module, division module, alarm triggering module and alarm module；
The input terminal of the high level detection module for being connected to the first end to be checked, the high level detection module it is defeated
Outlet is connected to the input terminal of the boost module, and the output end of the boost module is connected to the input of the division module
End, the output end of the division module are connected to the first triggering end of the alarm triggering module, the alarm triggering module
Output end is connected to the alarm module；
The high level detection module is used to export the first low level when the first identification resistive-open, when the liter
Die block exports the second low level when inputting the first low level, the division module is used to make the alarm according to the second low level
Trigger module is connected；When the alarm triggering module is connected, the alarm module alarm.
Further, it is high to be additionally operable to the output second when the first identification resistance is not opened a way for the high level detection module
Level, the boost module are additionally operable to according to the second high level output third high level, and the division module is additionally operable to according to
Three high level control the shutdown of the alarm triggering module.
Further, the high level detection module includes first switch pipe, the first divider resistance and the second divider resistance,
The first switch pipe includes the first collector, the first emitter and the first base stage；
First collector is connected to the 4th high level by first divider resistance, and first emitter passes through
The second divider resistance ground connection；Input terminal of first base stage as the high level detection module, first transmitting
Output end of the pole as the high level detection module.
Further, the alarm triggering module includes second switch pipe, third divider resistance and the 4th divider resistance, institute
It includes the second collector, the second emitter and the second base stage to state second switch pipe；
Second collector is connected to one end of the third divider resistance, and the other end of the third divider resistance is logical
It crosses the 4th divider resistance and is connected to the 5th high level；The output end of the alarm triggering module is by the third divider resistance
It is drawn with the junction of the 4th divider resistance, first triggering end of second emitter as the alarm triggering module, institute
It states the second base stage and is connected to the 6th high level.
Further, touch screen identification circuit further includes the second identification resistance, and one end ground connection of the second identification resistance is another
End is the second end to be checked；
The test circuit further includes first choice switch and the second selecting switch；
The first choice switch includes the first non-moving end, the first moved end and the second moved end；When first non-moving end and
When first moved end is connected, the input terminal of the high level detection module is connected to the first end to be checked, when first non-moving end and
When second moved end is connected, the second end to be checked is connect with the second base stage of the second switch pipe；
Second selecting switch includes the second non-moving end, third moved end and the 4th moved end；When second non-moving end and
When third moved end is connected, the output end of the division module is connected to the first triggering end of the alarm triggering module, when described
When second non-moving end is connected with the 4th moved end, the first triggering end ground connection.
Further, second base stage is connected to the 6th high level by a resistance.
Further, the alarm module alarm includes third switching tube and at least one alarm element, and the third is opened
It includes third collector, third emitter and third base stage to close pipe；
The third collector is grounded by the alarm element, and the third emitter is connected to the 5th high level, institute
State the output end that third base stage is connected to the alarm triggering module.
Further, the first switch pipe is NPN triode, and second switch pipe is NPN triode, and third switching tube is
PNP triode.
Further, the boost module includes boost chip and its peripheral circuit.
Further, the boost chip is ME2100A50M chips.
Compared with prior art, the beneficial effects of the utility model are：When the first identification resistive-open, high level detects
Module exports the first low level, and boost module exports the second low level when inputting the first low level, and division module is low according to second
Level makes alarm triggering module be connected, when alarm triggering module is connected, alarm module alarm；It can be opened in the first identification resistance
Alarm module alarm is triggered when road；Circuit structure is simpler, at low cost, and reliability is higher, versatile；It can effectively prevent from knowing
Other resistance rosin joint, dry joint, the touch screen outflow for the failure weldings such as set up a monument, have extraordinary using effect in the actual production process
Fruit.
Description of the drawings
Fig. 1 is the circuit diagram of touch screen identification circuit；
Fig. 2 is that the circuit of high level detection module and boost module shows in the test circuit that the utility model embodiment provides
It is intended to；
Fig. 3 is division module, alarm triggering module and alarm module in the test circuit that the utility model embodiment provides
Circuit diagram.
In figure：R31, the first identification resistance；R32, the second identification resistance；
10, high level detection module；20, boost module；30, division module；40, alarm triggering module；50, alarm mould
Block；Q5, first switch pipe；R27, the first divider resistance；R26, the second divider resistance；Q4, second switch pipe；R13, third partial pressure
Resistance；R14, the 4th divider resistance；Q3, third switching tube；J9, first choice switch；J10, the second selecting switch；
VCC, the first high level；Vout_1, third high level；VCC2, the 5th high level；RST, the 6th high level.
Specific implementation mode
In the following, in conjunction with attached drawing and specific implementation mode, the utility model is described further, it should be noted that
Under the premise of not colliding, it can be formed in any combination between various embodiments described below or between each technical characteristic new
Embodiment.
Touch screen identification circuit as shown in Figure 1, including the first identification resistance R31, one end of the first identification resistance R31 connects
It is connected to the first high level VCC, the other end is the first end to be checked.
If Fig. 2 is a kind of test circuit, it to be used for test touch screen identification circuit.Test circuit includes high level detection module
10, boost module 20, division module 30, alarm triggering module 40 and alarm module 50；
The input terminal of high level detection module 10 is for being connected to the first end to be checked, the output end of high level detection module 10
It is connected to the input terminal of boost module 20, the output end of boost module 20 is connected to the input terminal of division module 30, division module
30 output end is connected to the first triggering end of alarm triggering module 40, and the output end of alarm triggering module 40 is connected to alarm mould
Block 50；
High level detection module 10 is used to export the first low level when the first identification resistance R31 open circuits, works as boost module
The second low level is exported when 20 the first low level of input, division module 30 is used to make alarm triggering module 40 according to the second low level
Conducting；When alarm triggering module 40 is connected, alarm module 50 is alarmed.
In the present embodiment, division module 30 includes divider resistance R19 and divider resistance R20, divider resistance R19 and partial pressure
The junction of resistance R20 is the output end of boost module 20.
When such as there is rosin joint, dry joint, sets up a monument at the failure weldings in the first identification resistance R31, high level detection module 10 it is defeated
Enter termination and can not receive high level, export the first low level, therefore boost module 20 can not boost, exports the second low level；
First the second low electricity of low level about 0 in the present embodiment.Division module 30 provides low level to alarm triggering module 40 so that
Alarm triggering module 40 is connected, therefore triggers alarm module 50 and alarm, and realizes and detects that void occurs in the first identification resistance R31
Weldering, dry joint, the failure weldings alarm such as set up a monument function.
As preferred embodiment, high level detection module 10 is additionally operable to defeated when the first identification resistance R31 does not open a way
Go out the second high level, boost module 20 is additionally operable to according to the second high level output third high level Vout_1, and division module 30 is also
Shutdown for controlling alarm triggering module 40 according to third high level Vout_1.
I.e. when the first identification resistance R31 is normal, the input terminal of high level detection module 10 passes through the first identification resistance R31
It is connected to the first high level VCC, therefore high level detection module 10 can export the second high level.Second high level is enough to make liter
Die block 20 is boosted and exports third high level Vout_1.The voltage of the output end of division module 30 is higher later, alarm
Trigger module 40 is unsatisfactory for turn-on condition, therefore triggering alarm module 50 will not alarm.
As preferred embodiment, high level detection module 10 include first switch pipe Q5, the first divider resistance R27 and
Second divider resistance R26, first switch pipe Q5 include the first collector, the first emitter and the first base stage.In the present embodiment,
First switch pipe Q5 is NPN triode.
First collector is connected to the 4th high level by the first divider resistance R27, in the present embodiment, the 4th high level
For 3.3V；First emitter passes through the second divider resistance R26 ground connection；Input of first base stage as high level detection module 10
End, output end of first emitter as high level detection module 10.
When the first identification resistance R31 is normal, the first base stage is connected to the first high level by the first identification resistance R31
VCC, the pressure difference between the first base stage and the first emitter are more than 0.7V so that the first collector and the conducting of the first emitter；The
Four high level are exported by the first emitter to boost module 20 after the first divider resistance R27 and the second divider resistance R26 partial pressures.
In the present embodiment, output is more than 1.5V to two high level of voltage regulation of boost module 20, is more than the minimum of boost module 20
Operating voltage 0.9V, the second high level are enough that boost module 20 is made to carry out boost operations and export third high level Vout_1.
When the first identification resistance R31 open circuits, the first base stage is hanging, and first switch pipe Q5 is not turned on, thus boost module
20 do not work, that is, export the second low level, are such as 0V.Division module 30 exports smaller voltage to alarm triggering module 40 at this time
Or 0V voltages, therefore alarm triggering module 40 is connected, to which alarm module 50 is alarmed.
As preferred embodiment, alarm triggering module 40 includes second switch pipe Q4, third divider resistance R13 and the
Four divider resistance R14, second switch pipe Q4 include the second collector, the second emitter and the second base stage.In the present embodiment,
Two switching tube Q4 are NPN triode.
Second collector is connected to one end of third divider resistance R13, and the other end of third divider resistance R13 passes through the 4th
Divider resistance R14 is connected to the 5th high level VCC2, and the 5th high level VCC2 can be 3.3V；The output end of alarm triggering module 40
It is drawn by the junction of third divider resistance R13 and the 4th divider resistance R14, the second emitter is as alarm triggering module 40
First triggering end, the second base stage are connected to the 6th high level RST.
When division module 30 exports smaller voltage or 0V voltages to alarm triggering module 40, the second base stage and the second hair
Voltage difference between emitter-base bandgap grading is more than the conducting voltage of second switch pipe Q4, such as 0.7V, to the second current collection of second switch pipe Q4
Pole, the conducting of the second emitter.5th high level VCC2 is exported after third divider resistance R13 and the 4th divider resistance R14 partial pressures
To alarm module 50, triggering alarm module 50 is alarmed.
As shown in Figure 1, touch screen identification circuit further includes the second identification resistance R32, a termination of the second identification resistance R32
Ground, the other end are the second end to be checked.
As being further improved for the embodiment of the present invention, test circuit further includes that the selections of first choice switch J9 and second are opened
Close J10.
Wherein first choice switch J9 includes the first non-moving end, the first moved end and the second moved end；When the first non-moving end and
When one moved end is connected, the input terminal of high level detection module 10 is connected to the first end to be checked, when the first non-moving end and the second moved end
When connection, the second end to be checked is connect with the second base stage of second switch pipe Q4.
Second selecting switch J10 includes the second non-moving end, third moved end and the 4th moved end；When the second non-moving end and third are dynamic
When termination is logical, the output end of division module 30 is connected to the first triggering end of alarm triggering module 40, when the second non-moving end and the
When four moved ends are connected, the first triggering end ground connection.
When needing detection the first identification resistance R31,2 pins of selecting switch J8 are connected to 1 pin；It is motionless by first
End is connected with the first moved end, and the input terminal of high level detection module 10 is made to be connected to the first end to be checked；Simultaneously by the second non-moving end
It is connected with third moved end, the output end of division module 30 is made to be connected to the first triggering end of alarm triggering module 40.
When needing detection the second identification resistance R32,2 pins of selecting switch J8 are connected to 3 pins；Then by first
Non-moving end is connected with the second moved end, and the second end to be checked and the second base stage of second switch pipe Q4 is made to connect；It is motionless by second simultaneously
End is connected with the 4th moved end, and the first triggering end is made to be grounded.
As preferred embodiment, the second base stage is connected to the 6th high level RST by a resistance R14.
When detection the second identification resistance R32, if the welding such as there is rosin joint, dry joint, sets up a monument not in the second identification resistance R32
Good, then the second base stage is connected to the 6th high level RST, the second collector and the conducting of the second emitter by resistance R14, and the 5th is high
Level VCC2 outputs after third divider resistance R13 and the 4th divider resistance R14 partial pressures trigger alarm module to alarm module 50
50 alarms.
If the second identification resistance R32 is normal, the second base stage of second switch pipe Q4 is connect by the second identification resistance R32
Ground, the pressure difference between the second base stage and the second emitter is less than conducting voltage 0.7V, to the second current collection of second switch pipe Q4
Pole, the second emitter cannot be connected.Therefore the alarm of alarm module 50 can not be triggered.
As preferred embodiment, the alarm of alarm module 50 includes third switching tube Q3 and at least one alarm element,
Third switching tube Q3 includes third collector, third emitter and third base stage.In the present embodiment, third switching tube Q3 is
PNP triode.Third collector is grounded by alarm element, and third emitter is connected to the 5th high level VCC2, third base stage
It is connected to the output end of alarm triggering module 40.
In the present embodiment, alarm element includes alarm lamp LED1 and jingle bell FM2.
When the second collector and the second emitter are connected, the 5th high level VCC2 is through third divider resistance R13 and the 4th
It is exported to third base stage after divider resistance R14 partial pressures.In the present embodiment, the voltage of third base stage is less than 2.5V, third at this time
Voltage difference between emitter and third base stage is more than 0.7V so that third collector and the conducting of third emitter.Therefore third
The voltage of collector is about 3.3V, so that alarm element is alarmed.
When the second collector and the second emitter are not turned on, the voltage of third base stage is equal to the 5th high level VCC2,
Such as 3.3V, the voltage difference between third emitter and third base stage is less than 0.7V, and third collector and third emitter cannot be led
It is logical.Therefore the voltage of third collector is 0V, and alarm element is not alarmed.
As preferred embodiment, boost module 20 includes boost chip and its peripheral circuit.In the present embodiment, it rises
Pressure chip is ME2100A50M chips, and minimum operating voltage is 0.9V, and 0.5V voltages are exported after boosting.
Test circuit provided in an embodiment of the present invention for test touch screen identification circuit can identify resistance first
Alarm module alarm is triggered when open circuit, and may further the triggering alarm module alarm in the second identification resistive-open；Circuit
Structure is simpler, at low cost, and reliability is higher, versatile；It can effectively prevent from the welderings such as identifying resistance rosin joint, dry joint, set up a monument
Undesirable touch screen outflow is connect, there is extraordinary using effect in the actual production process.
The above embodiment is only preferred embodiments of the present invention, cannot be protected with this to limit the utility model
Range, the variation of any unsubstantiality that those skilled in the art is done on the basis of the utility model and replacing belongs to
In the utility model range claimed.
Claims (10)
1. a kind of test circuit is used for test touch screen identification circuit, which includes the first identification resistance, the
One end of one identification resistance is connected to the first high level, and the other end is the first end to be checked；It is characterized in that：The test circuit packet
Include high level detection module, boost module, division module, alarm triggering module and alarm module；
The input terminal of the high level detection module is for being connected to the first end to be checked, the output end of the high level detection module
It is connected to the input terminal of the boost module, the output end of the boost module is connected to the input terminal of the division module, institute
The output end for stating division module is connected to the first triggering end of the alarm triggering module, the output end of the alarm triggering module
It is connected to the alarm module；
The high level detection module is used to export the first low level when the first identification resistive-open, when the boosting mould
Block exports the second low level when inputting the first low level, the division module is used to make the alarm trigger according to the second low level
Module is connected；When the alarm triggering module is connected, the alarm module alarm.
2. test circuit as described in claim 1, it is characterised in that：The high level detection module is additionally operable to work as described first
Identification resistance exports the second high level when not opening a way, the boost module is additionally operable to according to the high electricity of the second high level output third
Flat, the division module is additionally operable to control the shutdown of the alarm triggering module according to third high level.
3. test circuit as claimed in claim 1 or 2, it is characterised in that：The high level detection module includes first switch
Pipe, the first divider resistance and the second divider resistance, the first switch pipe include the first collector, the first emitter and the first base
Pole；
First collector is connected to the 4th high level by first divider resistance, and first emitter passes through described
Second divider resistance is grounded；Input terminal of first base stage as the high level detection module, first emitter are made
For the output end of the high level detection module.
4. test circuit as claimed in claim 3, it is characterised in that：The alarm triggering module includes second switch pipe,
Three divider resistances and the 4th divider resistance, the second switch pipe include the second collector, the second emitter and the second base stage；
Second collector is connected to one end of the third divider resistance, and the other end of the third divider resistance passes through institute
It states the 4th divider resistance and is connected to the 5th high level；The output end of the alarm triggering module is by the third divider resistance and
The junctions of four divider resistances is drawn, first triggering end of second emitter as the alarm triggering module, and described the
Two base stages are connected to the 6th high level.
5. test circuit as claimed in claim 4, touch screen identification circuit further includes the second identification resistance, the second identification resistance
One end ground connection, the other end be the second end to be checked；
The test circuit further includes first choice switch and the second selecting switch；
The first choice switch includes the first non-moving end, the first moved end and the second moved end；When first non-moving end and first
When moved end is connected, the input terminal of the high level detection module is connected to the first end to be checked, when first non-moving end and second
When moved end is connected, the second end to be checked is connect with the second base stage of the second switch pipe；
Second selecting switch includes the second non-moving end, third moved end and the 4th moved end；When second non-moving end and third
When moved end is connected, the output end of the division module is connected to the first triggering end of the alarm triggering module, when described second
When non-moving end is connected with the 4th moved end, the first triggering end ground connection.
6. test circuit as claimed in claim 5, it is characterised in that：It is high that second base stage by a resistance is connected to the 6th
Level.
7. the test circuit as described in any one of claim 4-6, it is characterised in that：The alarm module alarm includes third
Switching tube and at least one alarm element, the third switching tube include third collector, third emitter and third base stage；
The third collector is grounded by the alarm element, and the third emitter is connected to the 5th high level, and described
Three base stages are connected to the output end of the alarm triggering module.
8. test circuit as claimed in claim 7, it is characterised in that：The first switch pipe is NPN triode, second switch
Pipe is NPN triode, and third switching tube is PNP triode.
9. test circuit as described in claim 1, it is characterised in that：The boost module includes boost chip and its periphery electricity
Road.
10. test circuit as claimed in claim 9, it is characterised in that：The boost chip is ME2100A50M chips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721726710.8U CN207742278U (en) | 2017-12-12 | 2017-12-12 | A kind of test circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721726710.8U CN207742278U (en) | 2017-12-12 | 2017-12-12 | A kind of test circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207742278U true CN207742278U (en) | 2018-08-17 |
Family
ID=63117862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721726710.8U Active CN207742278U (en) | 2017-12-12 | 2017-12-12 | A kind of test circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207742278U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111402770A (en) * | 2020-04-21 | 2020-07-10 | 昆山龙腾光电股份有限公司 | Testing device of display device |
-
2017
- 2017-12-12 CN CN201721726710.8U patent/CN207742278U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111402770A (en) * | 2020-04-21 | 2020-07-10 | 昆山龙腾光电股份有限公司 | Testing device of display device |
| CN111402770B (en) * | 2020-04-21 | 2022-05-24 | 昆山龙腾光电股份有限公司 | Testing device for display device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202033664U (en) | Detecting device for PLC (programmable logic controller) module channels | |
| CN207232324U (en) | A kind of fault diagnosis circuit of low side driving | |
| CN108051719A (en) | Power tube test circuit and power tube test device | |
| CN207742278U (en) | A kind of test circuit | |
| CN206077348U (en) | A kind of on/off circuit and its device of mobile terminal | |
| CN107402834A (en) | A kind of embedded system electrifying startup self checking method and device | |
| CN108321762A (en) | A kind of short-circuit protection circuit | |
| CN108055029A (en) | A kind of on-off circuit and the electronic equipment with the on-off circuit | |
| CN102053229A (en) | Power detection device | |
| CN208112210U (en) | A kind of short-circuit protection circuit | |
| CN204945296U (en) | A kind of cellular phone data line tester | |
| CN207265995U (en) | It is a kind of to use the key switch electromechanics road with ena-bung function linear voltage regulator | |
| CN203772995U (en) | Interface short-circuit detector | |
| CN209640454U (en) | A kind of fault detection means and terminal of terminal | |
| CN209328485U (en) | A kind of screen tester of automatic identification assembly screen model | |
| CN201387457Y (en) | Electrical property testing device of front frame keys of display | |
| CN104349528B (en) | LED status display system | |
| CN110456202A (en) | A kind of tamper machine testing control circuit and electronic equipment | |
| CN106953300A (en) | A kind of protective circuit of switch power source and display device | |
| CN207995245U (en) | The start control circuit and television set of television set | |
| CN209560005U (en) | A kind of detection circuit and power-supply management system | |
| CN204536515U (en) | A kind of multi-power system trouble-shooter | |
| CN209401290U (en) | Backlight circuit | |
| CN210535133U (en) | Electricity-consumption troubleshooting demonstration device | |
| CN207897182U (en) | A kind of LED failure observation circuit and instrument |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |