CN210112166U - Short circuit detection circuit and device suitable for high-definition multimedia interface - Google Patents
Short circuit detection circuit and device suitable for high-definition multimedia interface Download PDFInfo
- Publication number
- CN210112166U CN210112166U CN201920687948.7U CN201920687948U CN210112166U CN 210112166 U CN210112166 U CN 210112166U CN 201920687948 U CN201920687948 U CN 201920687948U CN 210112166 U CN210112166 U CN 210112166U
- Authority
- CN
- China
- Prior art keywords
- short circuit
- resistor
- signal
- short
- unit
- 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
Images
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
A short circuit detection circuit and a short circuit detection device suitable for a high-definition multimedia interface comprise a plurality of short circuit detection modules which are correspondingly connected with a plurality of groups of signal lines of the high-definition multimedia interface. Each short circuit detection module includes a switch unit and a display unit. The switch unit is connected with the working electric signal and is switched off or switched on according to whether the data signal output by the signal line is detected. The display unit is connected with the switch unit, and when the switch unit is conducted, the display unit outputs a warning signal to display that the switch unit does not detect a data signal and the signal line has a short circuit condition, so that quality detection personnel are reminded to judge the high-definition multimedia interface as a defective product; when the switch unit is turned off, the display unit is dormant, no warning signal is output, quality detection personnel know that the signal wire is not short-circuited, and can normally transmit data signals, so that the high-definition multimedia interface is judged to be qualified. The short circuit detection circuit and the short circuit detection device are simple in structure, high in detection efficiency and high in reliability.
Description
Technical Field
The utility model belongs to the technical field of high definition multimedia interface, especially, relate to a short circuit detection circuitry and device suitable for high definition multimedia interface.
Background
In the production process of the high-definition multimedia interface, when the quality of the high-definition multimedia interface is detected, whether a short circuit condition exists in a pin of the high-definition multimedia interface needs to be detected. At present, in a conventional detection method, a high-definition multimedia interface to be tested is connected with a signal source and a signal receiving device, and whether an image displayed on the signal receiving device is abnormal or not is observed by naked eyes, so that whether a short circuit condition exists on a pin of the high-definition multimedia interface or not is judged. However, the above-described conventional detection method is low in reliability and efficiency.
Therefore, the traditional high-definition multimedia interface short circuit detection technical scheme has the problems of low reliability and low efficiency caused by manual observation and judgment.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the utility model provides a short circuit detection circuit and device suitable for high definition multimedia interface aims at solving and has relying on artifical observation, the problem of judging the reliability that leads to and inefficiency among the traditional high definition multimedia interface short circuit detection technical scheme.
The embodiment of the utility model provides a short circuit detection circuitry suitable for high definition multimedia interface is provided to the first aspect, high definition multimedia interface includes input unit and output unit, input unit with the output unit is connected through multiunit signal line; the short circuit detection circuit includes:
the short circuit detection modules are respectively connected with the signal lines in a one-to-one correspondence manner and used for detecting whether the signal lines have short circuit conditions or not;
wherein each of the short detection modules includes:
the switch unit is connected with the corresponding signal line, is configured to be connected with a working electric signal and is switched off or switched on according to whether a data signal output by the signal line is detected; and
the signal line is connected with the switch unit and is configured to output a warning signal when the switch unit is conducted, and then the corresponding signal line is judged to have a short circuit condition; or the display unit is in a dormant state when the switch unit is turned off.
The utility model provides a second aspect provides a short circuit detection device suitable for high definition multimedia interface, including foretell short circuit detection circuitry: and
and a housing for encapsulating the short circuit detection circuit.
According to the short circuit detection circuit and the short circuit detection device suitable for the high-definition multimedia interface, the plurality of short circuit detection modules are respectively connected with the plurality of groups of signal lines of the high-definition multimedia interface in a one-to-one correspondence mode so as to detect whether short circuit conditions exist in the signal lines or not. Each short circuit detection module comprises a switch unit and a display unit, when the signal line normally outputs data signals, the switch unit is turned off, the display unit is in a dormant state, quality detection personnel know that the signal line is not short-circuited, and can normally transmit the data signals, so that the high-definition multimedia interface is judged to be qualified; and when the switch unit can not detect the data signal, the display unit sends out a warning signal to display that the corresponding signal line has a short circuit condition, and reminds quality detection personnel to judge the high-definition multimedia interface as a defective product. The short circuit detection circuit and the device have the advantages of simple structure, high detection efficiency and high reliability, and effectively solve the problems of low reliability and low efficiency caused by manual observation and judgment in the conventional high-definition multimedia interface short circuit detection technical scheme.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a schematic block diagram of a short-circuit detection circuit suitable for a high-definition multimedia interface according to an embodiment of the present invention;
fig. 2 is an exemplary circuit diagram of the short detection circuit shown in fig. 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Please refer to fig. 1, which is a schematic block diagram of a short-circuit detection circuit suitable for a high-definition multimedia interface according to an embodiment of the present invention, wherein for convenience of description, only the parts related to the embodiment are shown, and the detailed description is as follows:
the utility model provides an embodiment provides a short circuit detection circuitry suitable for high definition multimedia interface, high definition multimedia interface include input unit J1 and output unit J2, and input unit J1 is connected through the multiunit signal line with output unit J2. The short detection circuit includes a plurality of short detection modules (represented in fig. 1 by 101, 102, 103, 104, 105, 106, 107, 108, 110, 111, and 112, respectively). Each short circuit detection module includes a switch unit and a display unit.
Specifically, the input unit J1 of the high definition multimedia interface is connected to a signal source including, but not limited to, a set top box, a DVD (Digital Video Disc), and a repeater, and the signal output terminal is connected to a signal receiving apparatus including, but not limited to, a television, a personal computer, a monitor, and a repeater.
The high-definition multimedia interface has 19 pairs of pins, each pair of pins is arranged on the input unit J1 and the output unit J2, wherein 12 pairs of pins are signal pins, and each pair of signal pins are connected through a group of signal lines. In the production process of the high-definition multimedia interface, the phenomenon that a signal wire is unilateral to the ground easily occurs to cause short circuit, and the situation can not be accurately detected by a traditional detection method for observing a picture displayed on signal receiving equipment.
Because high definition multimedia interface is total 12 signal lines, consequently the utility model provides a short-circuit detection circuitry includes 12 short-circuit detection modules altogether, and every short-circuit detection module connects a set of signal line.
The short circuit detection modules are respectively connected with a plurality of groups of signal wires, and are used for detecting whether the corresponding signal wires have short circuit conditions.
The switch unit is connected with the corresponding signal line and used for accessing the working electric signal and switching off or on according to whether the data signal output by the signal line is detected.
The display unit is connected with the switch unit, and outputs a warning signal when the switch unit is switched on so as to remind quality detection personnel to judge that the corresponding signal line has a short-circuit condition; when the switch unit is turned off, the display unit is in a dormant state.
Specifically, when the display unit is in the sleep state, no signal is output.
In an optional embodiment, the short circuit detection circuit further includes a power supply unit. The unit is connected with the switch unit and used for outputting a working electric signal to the switch unit. Specifically, the working electrical signal is a 5V dc electrical signal.
Optionally, the power supply unit is implemented by using a power line of the high-definition multimedia interface, and may also be an external direct-current power supply.
In an optional embodiment, the short circuit detection circuit further includes a voltage reduction unit. The voltage reduction unit is connected with the signal line, the power supply unit and the switch unit and used for preventing the signal line from being in overvoltage. Specifically, in the process of carrying out short circuit detection, the signal line is connected with the power supply unit, and in order to prevent the working electric signal output by the power supply unit from influencing the performance of the signal line, a voltage reduction unit is added between the power supply unit and the signal line so as to protect the signal line.
The short circuit detection circuit suitable for the high-definition multimedia interface adopts the plurality of short circuit detection modules to be respectively connected with the plurality of groups of signal lines of the high-definition multimedia interface in a one-to-one correspondence manner so as to detect whether the signal lines are short-circuited or not. Each short circuit detection module comprises a switch unit and a display unit, when the signal line normally outputs data signals, the switch unit is turned off, the display unit is in a dormant state, quality detection personnel know that the signal line is not short-circuited, and can normally transmit the data signals, so that the high-definition multimedia interface is judged to be qualified; and when the switch unit can not detect the data signal, the display unit sends out a warning signal to display that the corresponding signal line has a short circuit condition, and reminds quality detection personnel to judge the high-definition multimedia interface as a defective product. The short circuit detection circuit and the device have the advantages of simple structure, high detection efficiency and high reliability, and effectively solve the problems of low reliability and low efficiency caused by manual observation and judgment in the conventional high-definition multimedia interface short circuit detection technical scheme.
Fig. 2 is a circuit diagram illustrating an example of the short circuit detection circuit shown in fig. 1, and for convenience of description, the operation principle of the short circuit detection circuit is described below by taking only one short circuit detection module 101 in the short circuit detection circuit as an example, and the operation principles of the other short circuit detection modules are the same as the operation principle of the short circuit detection module 101. The details are as follows:
the short circuit detection module 101 includes a switch unit 11 and a display unit 12. Optionally, the short circuit detection module 101 further includes a power supply unit 13 and a voltage reduction unit 14.
In an alternative embodiment, the switch unit 11 includes a first resistor R1, a second resistor R2, and a PNP transistor Q1.
The first end of the first resistor R1 is connected to a working electric signal, the second end of the first resistor R1 is connected to an emitter of the PNP type triode Q1, a base of the PNP type triode Q1 is connected to the first end of the second resistor R2, and the second end of the second resistor R2 is connected to a signal line.
Specifically, the working electric signal is a 5V direct current signal, and when the signal wire normally outputs a data signal, the PNP type triode Q1Is equal to the voltage of the base, i.e. VE＝VBAt this time, the PNP transistor Q1 is in an off state. Since the collector of the PNP transistor Q1 is used as the output terminal of the switching unit 11 and connected to the input terminal of the display unit, at this time, the PNP transistor Q1 is turned off, so that no voltage signal is output, and the display unit is in a sleep state, i.e., does not output any signal.
When a short circuit occurs in a certain signal line, the base voltage of the PNP type triode Q1 is VBIs pulled low, at this time VE>VBAnd V isC>VBThe collecting junction and the emitting junction are simultaneously positively biased, the PNP type triode Q1 is in a saturated state, the PNP type triode Q1 is conducted, the collecting electrode has voltage signal output, the display unit is electrified to work, and a warning signal is sent out to remind quality detection personnel that a short circuit condition exists in a signal line correspondingly connected with the short circuit detection module.
Because high definition multimedia interface's 12 groups of signal lines all are connected with short circuit detection module, and every short circuit detection module all includes switch element 11 and display element, consequently the utility model provides a short circuit detection circuitry can not only detect out this whole of high definition multimedia interface and whether has the short circuit phenomenon, more can the accurate position that detects out the signal line that the short circuit specifically takes place for the high definition multimedia interface that has the short circuit phenomenon, has improved the accuracy and the accuracy that detect greatly.
In an alternative embodiment, the display unit is implemented by using a light emitting diode D1. The anode of the light emitting diode D1 is connected to the switch module, specifically to the output end of the switch module, i.e. the collector of the PNP transistor Q1; the cathode of the led D1 is grounded.
Optionally, the display unit may also be implemented by an audible and visual alarm.
In an alternative embodiment, the voltage dropping unit includes a third resistor R3, a fourth resistor R4, and a fifth resistor R5.
The first end of the third resistor R3 is connected to the signal line, the second end of the third resistor R3, the first end of the fourth resistor R4 and the first end of the fifth resistor R5 are connected together, the second end of the fourth resistor R4 is connected to the power unit, and the second end of the fifth resistor R5 is connected to the ground.
The voltage reduction unit is connected between the power supply unit and the signal line and plays roles of reducing voltage and limiting current.
In an optional embodiment, the short circuit detection circuit further includes a wireless communication module. The wireless communication module is connected with the detection module and used for transmitting the warning signal to the background in a wireless communication mode so that the background can count the qualification rate of the high-definition multimedia interface.
The embodiment of the utility model provides a second aspect provides a short circuit detection device suitable for high definition multimedia interface, include foretell short circuit detection circuitry and carry out the shell of encapsulation with this short circuit detection circuitry.
In an alternative embodiment, the housing includes a metal housing and a plastic housing.
To sum up, the embodiment of the utility model provides a short circuit detection circuitry and device suitable for high definition multimedia interface adopts a plurality of short circuit detection module to carry out the one-to-one with high definition multimedia interface's multiunit signal line respectively and is connected to whether there is the short circuit condition in each signal line of detection. Each short circuit detection module comprises a switch unit and a display unit, when the signal line normally outputs data signals, the switch unit is turned off, the display unit is in a dormant state, quality detection personnel know that the signal line is not short-circuited, and can normally transmit the data signals, so that the high-definition multimedia interface is judged to be qualified; and when the switch unit can not detect the data signal, the display unit sends out a warning signal to display that the corresponding signal line has a short circuit condition, and reminds quality detection personnel to judge the high-definition multimedia interface as a defective product. The short circuit detection circuit and the device have the advantages of simple structure, high detection efficiency and high reliability, the short circuit detection circuit is composed of common electronic elements, low in cost and easy to maintain, and the problems of low reliability and low efficiency caused by manual observation and judgment in the conventional high-definition multimedia interface short circuit detection technical scheme are effectively solved.
Various embodiments are described herein for various ways and devices. Numerous specific details are set forth in order to provide a thorough understanding of the overall structure, function, manufacture, and use of the embodiments as described in the specification and illustrated in the accompanying drawings. However, it will be understood by those skilled in the art that the embodiments may be practiced without such specific details. In other instances, well-known operations, components and elements have been described in detail so as not to obscure the embodiments in the description. It will be appreciated by those of ordinary skill in the art that the embodiments herein and shown are non-limiting examples, and thus, it can be appreciated that the specific structural and functional details disclosed herein may be representative and do not necessarily limit the scope of the embodiments.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A short circuit detection circuit suitable for a high-definition multimedia interface comprises an input unit and an output unit, wherein the input unit is connected with the output unit through a plurality of groups of signal lines; characterized in that the short circuit detection circuit comprises:
the short circuit detection modules are respectively connected with the signal lines in a one-to-one correspondence manner and used for detecting whether the signal lines have short circuit conditions or not;
wherein each of the short detection modules includes:
the switch unit is connected with the corresponding signal line, is configured to be connected with a working electric signal and is switched off or switched on according to whether a data signal output by the signal line is detected; and
the signal line is connected with the switch unit and is configured to output a warning signal when the switch unit is conducted, and then the corresponding signal line is judged to have a short circuit condition; or the display unit is in a dormant state when the switch unit is turned off.
2. The short detection circuit of claim 1, further comprising:
and the power supply unit is connected with the switch unit and is configured to output the working electric signal.
3. The short detection circuit of claim 2, further comprising:
and a voltage reduction unit connected to the signal line, the power supply unit, and the switch unit, and configured to prevent overvoltage of the signal line.
4. The short detection circuit of claim 1, wherein the switching unit comprises:
the circuit comprises a first resistor, a second resistor and a PNP type triode;
the first end of the first resistor is connected to the working electric signal, the second end of the first resistor is connected to the emitting electrode of the PNP type triode, the base electrode of the PNP type triode is connected to the first end of the second resistor, and the second end of the second resistor is connected to the signal wire.
5. The short detection circuit of claim 1, wherein the display unit comprises:
a light emitting diode;
the anode of the light emitting diode is connected with the switch unit, and the cathode of the light emitting diode is grounded.
6. The short circuit detection circuit of claim 2, wherein the power supply unit is implemented using a power line of the high definition multimedia interface.
7. The short detection circuit of claim 3, wherein the voltage reduction unit comprises:
a third resistor, a fourth resistor and a fifth resistor;
the first end of the third resistor is connected with the signal wire, the second end of the third resistor, the first end of the fourth resistor and the first end of the fifth resistor are connected in common, the second end of the fourth resistor is connected with the power supply unit, and the second end of the fifth resistor is grounded.
8. The short detection circuit of claim 1, further comprising:
and the wireless communication module is connected with the detection module and is configured to transmit the warning signal to a background in a wireless communication mode so that the background can count the qualification rate of the high-definition multimedia interface.
9. The utility model provides a short circuit detection device suitable for high definition multimedia interface which characterized in that includes:
the short detection circuit of any one of claims 1 to 8: and
and a housing for encapsulating the short circuit detection circuit.
10. The short circuit detection device of claim 9, wherein the housing comprises a metal housing and a plastic housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920687948.7U CN210112166U (en) | 2019-05-14 | 2019-05-14 | Short circuit detection circuit and device suitable for high-definition multimedia interface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920687948.7U CN210112166U (en) | 2019-05-14 | 2019-05-14 | Short circuit detection circuit and device suitable for high-definition multimedia interface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210112166U true CN210112166U (en) | 2020-02-21 |
Family
ID=69540017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920687948.7U Active CN210112166U (en) | 2019-05-14 | 2019-05-14 | Short circuit detection circuit and device suitable for high-definition multimedia interface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210112166U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113466738A (en) * | 2021-05-31 | 2021-10-01 | 广东朝阳电子科技股份有限公司 | Short circuit detection circuit |
| CN114325473A (en) * | 2021-12-24 | 2022-04-12 | 广州星际悦动股份有限公司 | Short circuit detection circuit, method, device, electronic device and storage medium |
-
2019
- 2019-05-14 CN CN201920687948.7U patent/CN210112166U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113466738A (en) * | 2021-05-31 | 2021-10-01 | 广东朝阳电子科技股份有限公司 | Short circuit detection circuit |
| CN114325473A (en) * | 2021-12-24 | 2022-04-12 | 广州星际悦动股份有限公司 | Short circuit detection circuit, method, device, electronic device and storage medium |
| CN114325473B (en) * | 2021-12-24 | 2024-03-08 | 广州星际悦动股份有限公司 | Short circuit detection circuit, short circuit detection method, short circuit detection device, electronic equipment and storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3588734A1 (en) | Terminal and battery charging control device and method thereof | |
| CN210112166U (en) | Short circuit detection circuit and device suitable for high-definition multimedia interface | |
| CN204631181U (en) | The testing circuit of a kind of rechargeable battery positive and negative electrode reversal connection | |
| CN201503689U (en) | Video equipment | |
| CN101290538A (en) | Mainboard voltage monitoring apparatus and voltage delay circuit | |
| CN103871340B (en) | Signaling interface detecting device | |
| CN101231550A (en) | Apparatus for monitoring mainboard voltage | |
| CN206505161U (en) | A kind of new and effective key-press status detection circuit | |
| CN106526403B (en) | A kind of terminal leakage current detection circuit, terminal and terminal leakage current test system | |
| CN208707831U (en) | A kind of web camera batch testing tooling | |
| CN102053229A (en) | Power detection device | |
| CN103309247A (en) | Power supply control circuit and electronic device | |
| WO2014187017A1 (en) | Overvoltage protection circuit and electronic device having same | |
| CN112531813A (en) | Wireless device charger and wireless device charger detection method | |
| CN105588988A (en) | Electronic equipment test system | |
| CN203466962U (en) | Audio port identification circuit and communication device | |
| CN203825133U (en) | VGA cable testing instrument | |
| CN203772980U (en) | Wiring structure used for detecting passive switch signal | |
| CN2912171Y (en) | TV set having integrated fault auto checking and alarming circuit | |
| WO2014079099A1 (en) | Digital display and detection system of esd protection chip | |
| TWI737533B (en) | Overvoltage protection circuit and usb type-c connector | |
| CN107681712A (en) | A kind of battery charge control circuit | |
| CN207351569U (en) | A kind of high-low voltage electric power distribution cabinet circuit intelligent testing and warning system | |
| US20180063337A1 (en) | Centralized theft-proof device | |
| CN219016469U (en) | Circuit for detecting TVS tube performance |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |