CN102636719B - Detection circuit and detection system for detecting pin abnormality of differential pair in display interface - Google Patents
Detection circuit and detection system for detecting pin abnormality of differential pair in display interface Download PDFInfo
- Publication number
- CN102636719B CN102636719B CN201110038125.XA CN201110038125A CN102636719B CN 102636719 B CN102636719 B CN 102636719B CN 201110038125 A CN201110038125 A CN 201110038125A CN 102636719 B CN102636719 B CN 102636719B
- Authority
- CN
- China
- Prior art keywords
- pin
- electrically connected
- light emitting
- positive contact
- ground connection
- 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.)
- Expired - Fee Related
Links
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses a detection circuit and a detection system for detecting the pin abnormality of a differential pair in a display interface. The detection circuit comprises a first abnormal alarming module, two first light-emitting diodes and two first current-limiting resistors. After being commonly and electrically connected with a first common junction, the two first light-emitting diodes are respectively connected with two first current-limiting resistors in series and connected with a first anode junction and a first cathode junction. The detection circuit provided by the invention has a simple integral structure, and can be directly combined with an HDMI (high-definition multimedia interface) or a DVI (digital video interface) so as to reduce the integral production cost and maintain good signal quality.
Description
Technical field
The present invention relates to a kind of testing circuit and detection system thereof, relate in particular to the differential to the abnormal testing circuit in pin position and detection system thereof of a kind of detection display interface.
Background technology
Most video product on the market at present, such as TV, screen or computer, dispose high-definition multi-media interface (the High Definition Media Interface that adopts TMDS (Transition Minimized Differential Signalling) technology to reach video and audio transmission, or digital video interface (Digital Visual Interface, DVI) HDMI).
Because TMDS technology is utilized several groups of differential waves and transmitted, therefore HDMI and DVI interface can have more antijamming capability, effectively suppress electromagnetic interference (EMI) (EMI) and the accurate advantage of sequential location compared with the interface of single signal transmission.In addition, even if there are the empty weldering of a differential wave or short circuit in HDMI or DVI interface on piece is produced, because determinand demodulation IC judgement is enough strong, still likely can normal output signal.
But while facing HDMI interface extensively by use, Ge great factory is all difficult to detect the problem of the empty weldering of differential wave or short circuit on producing.Usually all in the second half section, production test is just pinpointed the problems, and even after shipment, runs into the poor signal source of signal quality and just finds, therefore all must enclose the more maintenance cost of great number.Thus, no matter, on cost or in client's perception, all can cause serious loss.
Therefore, how to develop a kind of detection and be welded in the differential to the abnormal testing circuit in pin position and detection system of display interface on circuit board, become the problem that the art urgently faces.
Summary of the invention
In view of this, a category of the present invention is to provide a kind of detection to be welded in the differential to the abnormal testing circuit in pin position and detection system of display interface on circuit board, to reduce overall production cost, keeps good signal quality.
According to a specific embodiment, detection of the present invention is welded in the differential to the abnormal testing circuit in pin position of display interface on circuit board.Testing circuit includes: one first abnormal alarm module, it has 2 first light emitting diodes and 2 first current-limiting resistances.2 first light emitting diodes are electrically connected at after one first common joint jointly, then are connected in series respectively this 2 first current-limiting resistance and are connected in one first positive contact and one first negative contacts.
In addition, testing circuit of the present invention includes one second abnormal alarm module, it has 2 second light emitting diodes and 2 second current-limiting resistances, this 2 second light emitting diode is electrically connected at after one second common joint jointly, then is connected in series respectively this 2 second current-limiting resistance and is connected in one second positive contact and one second negative contacts.
In addition, testing circuit of the present invention includes one the 3rd abnormal alarm module, it has 2 the 3rd light emitting diodes and 2 the 3rd current-limiting resistances, this 2 the 3rd light emitting diode is electrically connected at after one the 3rd common joint jointly, then is connected in series respectively this 2 the 3rd current-limiting resistance and is connected in one the 3rd positive contact and one the 3rd negative contacts.
Moreover, testing circuit of the present invention includes one the 4th abnormal alarm module, it has 2 the 4th light emitting diodes and 2 the 4th current-limiting resistances, this 2 the 4th light emitting diode is electrically connected at after one the 4th common joint jointly, then is connected in series respectively this 2 the 4th current-limiting resistance and is connected in one the 4th positive contact and one the 4th negative contacts.
Compared to known technology, the one-piece construction of testing circuit of the present invention is simple and easy, and uncomplicated, can directly be combined with HDMI or DVI interface, reduces overall production cost to reach, and keeps invention effect of good signal quality.
Another category of the present invention is to provide a kind of detection to be welded in the differential to the abnormal detection system in pin position of display interface on circuit board, and it,, in order to reduce overall production cost, keeps good signal quality.
According to a specific embodiment, this detection system includes a display interface and a testing circuit.Display interface is welded on circuit board, this display interface have one group first differential to pin, this first differentially has one first anodal pin, one first negative pole pin and one first ground connection pin to pin.Testing circuit has one first abnormal alarm module, this first abnormal alarm module has 2 first light emitting diodes and 2 first current-limiting resistances, this 2 first light emitting diode is electrically connected at after one first common joint jointly, be connected in series respectively again this 2 first current-limiting resistance and be connected in one first positive contact and one first negative contacts, this first positive contact is electrically connected at this first anodal pin, this first negative contacts is electrically connected at this first negative pole pin, and this first common joint is electrically connected at this first ground connection pin.Wherein, when the short circuit or while opening a way respectively, this 2 first light emitting diode that is connected in this first positive contact and this first negative contacts can extinguish at the same time or separately each other of this first anodal pin, this first negative pole pin and this first ground connection pin.
Moreover, this display interface of this detection system have one group second differential to pin, this second differentially has one second anodal pin, one second negative pole pin and one second ground connection pin to pin; This testing circuit has more one second abnormal alarm module, it has 2 second light emitting diodes and 2 second current-limiting resistances, this 2 second light emitting diode is electrically connected at after one second common joint jointly, be connected in series respectively again this 2 second current-limiting resistance and be connected in one second positive contact and one second negative contacts, this second positive contact is electrically connected at this second anodal pin, this second negative contacts is electrically connected at this second negative pole pin, and this second common joint is electrically connected at this second ground connection pin; Wherein, when the short circuit or while opening a way respectively, this 2 second light emitting diode that is connected in this second positive contact and this second negative contacts can extinguish at the same time or separately each other of this second anodal pin, this second negative pole pin and this second ground connection pin.
In addition, this display interface of this detection system have one group the 3rd differential to pin, the 3rd differentially has one the 3rd anodal pin, one the 3rd negative pole pin and one the 3rd ground connection pin to pin; This testing circuit has more one the 3rd abnormal alarm module, it has 2 the 3rd light emitting diodes and 2 the 3rd current-limiting resistances, this 2 the 3rd light emitting diode is electrically connected at after one the 3rd common joint jointly, be connected in series respectively again this 2 the 3rd current-limiting resistance and be connected in one the 3rd positive contact and one the 3rd negative contacts, the 3rd positive contact is electrically connected at the 3rd anodal pin, the 3rd negative contacts is electrically connected at the 3rd negative pole pin, and the 3rd common joint is electrically connected at the 3rd ground connection pin; Wherein, when the short circuit or while opening a way respectively, this 2 the 3rd light emitting diode that is connected in the 3rd positive contact and the 3rd negative contacts can extinguish at the same time or separately each other of the 3rd anodal pin, the 3rd negative pole pin and the 3rd ground connection pin.
In addition, this display interface of this detection system have one group the 4th differential to pin, the 4th differentially has one the 4th anodal pin, one the 4th negative pole pin and one the 4th ground connection pin to pin; This testing circuit has more one the 4th abnormal alarm module, it has 2 the 4th light emitting diodes and 2 the 4th current-limiting resistances, this 2 the 4th light emitting diode is electrically connected at after one the 4th common joint jointly, be connected in series respectively again this 2 the 4th current-limiting resistance and be connected in one the 4th positive contact and one the 4th negative contacts, the 4th positive contact is electrically connected at the 4th anodal pin, the 4th negative contacts is electrically connected at the 4th negative pole pin, and the 4th common joint is electrically connected at the 4th ground connection pin; Wherein, when the short circuit or while opening a way respectively, this 2 the 4th light emitting diode that is connected in the 4th positive contact and the 4th negative contacts can extinguish at the same time or separately each other of the 4th anodal pin, the 4th negative pole pin and the 4th ground connection pin.
In practical application, the present invention detects and is welded in differential this display interface to the abnormal detection system in pin position of display interface on circuit board is HDMI or DVI.
Compared to known technology, it is differential to the abnormal detection system in the pin position graphics video signal generator (video pattern generator) of can arranging in pairs or groups that detection of the present invention is welded in display interface on circuit board, although many one programs, and on the test duration, relatively have more a part of cost, reduce overall production cost but can reach, keep invention effect of good signal quality.
Can be further understood by the following detailed description and accompanying drawings about the advantages and spirit of the present invention.
Brief description of the drawings
Fig. 1 is the schematic diagram that is welded in display interface on circuit board illustrating according to a specific embodiment of the present invention.
Fig. 2 illustrates the schematic diagram of holding simple and easy framework according to the SINK at the HDMI interface of a specific embodiment of the present invention.
Fig. 3 is the circuit diagram illustrating according to the detection system of a specific embodiment of the present invention.
Fig. 4 illustrates the schematic diagram that is welded in display interface on circuit board according to the sky of a specific embodiment of the present invention.
Fig. 5 illustrates the schematic diagram that is welded in display interface on circuit board according to the short circuit of a specific embodiment of the present invention.
Description of reference numerals in above-mentioned accompanying drawing is as follows:
1: detection system A: show interface
B: circuit board C: testing circuit
A1: the first anodal pin A2: the first negative pole pin
A3: the first ground connection pin A4: the second anodal pin
A5: the second negative pole pin A6: the second ground connection pin
A7: the 3rd anodal pin A8: the 3rd negative pole pin
A9: the 3rd ground connection pin A10: the 4th anodal pin
A11: the 4th negative pole pin A12: the 4th ground connection pin
C1: the first abnormal alarm module C2: the second abnormal alarm module
C3: the 3rd abnormal alarm module C4: the 4th abnormal alarm module
N1: the first positive contact N2: the first negative contacts
N3: the first common joint N4: the second positive contact
N5: the second negative contacts N6: the second common joint
N7: the 3rd positive contact N8: the 3rd negative contacts
N9: the 3rd common joint N10: the 4th positive contact
N11: the 4th negative contacts N12: the 4th common joint
CL11, CL12: the first light emitting diode CR11, CR12: the first current-limiting resistance
CL21, CL22: the second light emitting diode CR21, CR22: the second current-limiting resistance
CL31, CL32: the 3rd light emitting diode CR31, CR32: the 3rd current-limiting resistance
CL41, CL42: the 4th light emitting diode CR41, CR42: the 4th current-limiting resistance
R
t: terminal resistance A
vcc: internal bias voltage
Embodiment
Refer to Fig. 1 and Fig. 2.Fig. 1 is the schematic diagram that is welded in the upper display interface of circuit board B illustrating according to a specific embodiment of the present invention.Fig. 2 illustrates the schematic diagram of holding simple and easy framework according to the SINK at the HDMI interface of a specific embodiment of the present invention.As shown in Figure 1, the display interface A of the present embodiment explains with HDMI Type A, but pin definition this do not repeat more.In addition, the present invention detects the problem that HDMI interface often runs on producing, the empty weldering of for example TMDS or short circuit, and the SINK that can understand HDMI by Fig. 2 holds simple and easy framework, wherein in differential wave (plus or minus utmost point pin), connects respectively a terminal resistance R
t, and draw and be loaded onto internal bias voltage A
vcc, to utilize this characteristic to detect.Much more no longer the SINK of above-mentioned HDMI holds simple and easy framework and known and indifference, to repeat at this.
Refer to Fig. 3, Fig. 3 is the circuit diagram illustrating according to the detection system 1 of a specific embodiment of the present invention.As shown in Figure 3, the invention provides a kind of detection and be welded in the differential to the abnormal detection system 1 in pin position of the upper display interface A of circuit board B, it includes the display interface A and the testing circuit C that are welded on circuit board B.
It is upper that display interface A is welded in circuit board B (do not show in figure), this display interface A have one group first differential to pin, one group second differential to pin, one group the 3rd differential to pin and one group the 4th differential to pin.First differentially has one first anodal pin A1, one first negative pole pin A2 and one first ground connection pin A3 to pin; Second differentially has one second anodal pin A4, one second negative pole pin A5 and one second ground connection pin A6 to pin; The 3rd differentially has one the 3rd anodal pin A7, one the 3rd negative pole pin A8 and one the 3rd ground connection pin A9 to pin; The 4th differentially has one the 4th anodal pin A10, one the 4th negative pole pin A11 and one the 4th ground connection pin A12 to pin.
Testing circuit C has one first abnormal alarm module C1, one second abnormal alarm module C2, one the 3rd abnormal alarm module C3, one the 4th abnormal alarm module C4.In addition, testing circuit C has more one first positive contact N1, one first negative contacts N2, one first common joint N3, one second positive contact N4, one second negative contacts N5, one second common joint N6, one the 3rd positive contact N7, one the 3rd negative contacts N8, one the 3rd common joint N9, one the 4th positive contact N10, one the 4th negative contacts N11 and one the 4th common joint N12 and is electrically connected with the pin of display interface A respectively.
The first abnormal alarm module C1 has 2 first light emitting diode CL11, CL12 and 2 first current-limiting resistance CR11, CR12, this 2 first light emitting diode CL11, CL12 are electrically connected at after the first common joint N3 jointly, then are connected in series respectively this 2 first current-limiting resistance CR11, CR12 and are connected in the first positive contact N1 and the first negative contacts N2.In this specific embodiment, this first positive contact N1 is electrically connected at this first anodal pin A1, and this first negative contacts N2 is electrically connected at this first negative pole pin A2, and this first common joint N3 is electrically connected at this first ground connection pin A3.
The second abnormal alarm module C2 has 2 second light emitting diode CL21, CL22 and 2 second current-limiting resistance CR21, CR22, this 2 second light emitting diode CL21, CL22 are electrically connected at after the second common joint N6 jointly, then are connected in series respectively this 2 second current-limiting resistance CR21, CR22 and are connected in the second positive contact N4 and the second negative contacts N5.In this specific embodiment, this second positive contact N4 is electrically connected at this second anodal pin A4, and this second negative contacts N5 is electrically connected at this second negative pole pin A5, and this second common joint N6 is electrically connected at this second ground connection pin A6.
The 3rd abnormal alarm module C3 has 2 the 3rd light emitting diode CL31, CL32 and 2 the 3rd current-limiting resistance CR31, CR32, this 2 the 3rd light emitting diode CL31, CL32 are electrically connected at after the 3rd common joint N9 jointly, be connected in series respectively this 2 the 3rd current-limiting resistance CR31, CR32 again and be connected in the 3rd positive contact N7 and the 3rd negative contacts N8, the 3rd positive contact N7 is electrically connected at the 3rd anodal pin A7.In this specific embodiment, the 3rd negative contacts N8 is electrically connected at the 3rd negative pole pin A8, and the 3rd common joint N9 is electrically connected at the 3rd ground connection pin A9.
The 4th abnormal alarm module C4 has 2 the 4th light emitting diode CL41, CL42 and 2 the 4th current-limiting resistance CR41, CR42, this 2 the 4th light emitting diode CL41, CL42 are electrically connected at after the 4th common joint N12 jointly, then are connected in series respectively this 2 the 4th current-limiting resistance CR41, CR42 and are connected in the 4th positive contact N10 and the 4th negative contacts N11.In this specific embodiment, the 4th positive contact N10 is electrically connected at the 4th anodal pin A10, and the 4th negative contacts N11 is electrically connected at the 4th negative pole pin A11, and the 4th common joint N12 is electrically connected at the 4th ground connection pin A12.
Refer to Fig. 4, Fig. 4 illustrates the schematic diagram that is welded in display interface on circuit board according to the sky of a specific embodiment of the present invention.As shown in Figure 4, in this specific embodiment, in the time of this first anodal pin A1 open circuit, this first light emitting diode CL11 that is connected in this first positive contact N1 can extinguish, therefore can learn that by testing circuit of the present invention unusual condition occurs the first anodal pin A1 at once.In this specific embodiment, it is identical that other pins of display interface A detect principle, therefore not this repeats more.
Refer to Fig. 5, Fig. 5 illustrates the schematic diagram that is welded in display interface on circuit board according to the short circuit of a specific embodiment of the present invention.As shown in Figure 5, in this specific embodiment, in the time of the first anodal pin A1 and the first ground connection pin A3 short circuit, this the first light emitting diode CL11 that is connected in this first positive contact N1 can extinguish, therefore can learn that by testing circuit of the present invention unusual condition occurs for the first anodal pin A1 or the first ground connection pin A3 at once.In this specific embodiment, it is also identical that other pins of display interface A detect principle, therefore not this repeats more.
Compared to known technology, although detection of the present invention is welded in the differential to many one programs of the abnormal detection system in pin position of display interface on circuit board, and on the test duration, relatively have more a part of cost, reduce overall production cost but can reach, keep invention effect of good signal quality.
Claims (6)
1. detection is welded in the differential to the abnormal detection system in pin position of display interface on circuit board, and it includes:
One display interface, it is welded on circuit board, this display interface have one group first differential to pin, this first differentially has one first anodal pin, one first negative pole pin and one first ground connection pin to pin; And
One testing circuit, it has one first abnormal alarm module, this first abnormal alarm module has 2 first light emitting diodes and 2 first current-limiting resistances, this 2 first light emitting diode is electrically connected at after one first common joint jointly, be connected in series respectively again this 2 first current-limiting resistance and be connected in one first positive contact and one first negative contacts, this first positive contact is electrically connected at this first anodal pin, this first negative contacts is electrically connected at this first negative pole pin, and this first common joint is electrically connected at this first ground connection pin;
Wherein, when the short circuit or while opening a way respectively, this 2 first light emitting diode that is connected in this first positive contact and this first negative contacts can extinguish at the same time or separately each other of this first anodal pin, this first negative pole pin and this first ground connection pin.
2. detection system as claimed in claim 1, wherein this display interface have more one group second differential to pin, this second differentially has one second anodal pin, one second negative pole pin and one second ground connection pin to pin; This testing circuit has more one second abnormal alarm module, it has 2 second light emitting diodes and 2 second current-limiting resistances, this 2 second light emitting diode is electrically connected at after one second common joint jointly, be connected in series respectively again this 2 second current-limiting resistance and be connected in one second positive contact and one second negative contacts, this second positive contact is electrically connected at this second anodal pin, this second negative contacts is electrically connected at this second negative pole pin, and this second common joint is electrically connected at this second ground connection pin; Wherein, when the short circuit or while opening a way respectively, this 2 second light emitting diode that is connected in this second positive contact and this second negative contacts can extinguish at the same time or separately each other of this second anodal pin, this second negative pole pin and this second ground connection pin.
3. detection system as claimed in claim 2, wherein this display interface have more one group the 3rd differential to pin, the 3rd differentially has one the 3rd anodal pin, one the 3rd negative pole pin and one the 3rd ground connection pin to pin; This testing circuit has more one the 3rd abnormal alarm module, it has 2 the 3rd light emitting diodes and 2 the 3rd current-limiting resistances, this 2 the 3rd light emitting diode is electrically connected at after one the 3rd common joint jointly, be connected in series respectively again this 2 the 3rd current-limiting resistance and be connected in one the 3rd positive contact and one the 3rd negative contacts, the 3rd positive contact is electrically connected at the 3rd anodal pin, the 3rd negative contacts is electrically connected at the 3rd negative pole pin, and the 3rd common joint is electrically connected at the 3rd ground connection pin; Wherein, when the short circuit or while opening a way respectively, this 2 the 3rd light emitting diode that is connected in the 3rd positive contact and the 3rd negative contacts can extinguish at the same time or separately each other of the 3rd anodal pin, the 3rd negative pole pin and the 3rd ground connection pin.
4. detection system as claimed in claim 3, wherein this display interface have more one group the 4th differential to pin, the 4th differentially has one the 4th anodal pin, one the 4th negative pole pin and one the 4th ground connection pin to pin; This testing circuit has more one the 4th abnormal alarm module, it has 2 the 4th light emitting diodes and 2 the 4th current-limiting resistances, this 2 the 4th light emitting diode is electrically connected at after one the 4th common joint jointly, be connected in series respectively again this 2 the 4th current-limiting resistance and be connected in one the 4th positive contact and one the 4th negative contacts, the 4th positive contact is electrically connected at the 4th anodal pin, the 4th negative contacts is electrically connected at the 4th negative pole pin, and the 4th common joint is electrically connected at the 4th ground connection pin; Wherein, when the short circuit or while opening a way respectively, this 2 the 4th light emitting diode that is connected in the 4th positive contact and the 4th negative contacts can extinguish at the same time or separately each other of the 4th anodal pin, the 4th negative pole pin and the 4th ground connection pin.
5. detection system as claimed in claim 1, wherein this display interface is high-definition multi-media interface.
6. detection system as claimed in claim 1, wherein this display interface is digital video interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110038125.XA CN102636719B (en) | 2011-02-12 | 2011-02-12 | Detection circuit and detection system for detecting pin abnormality of differential pair in display interface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110038125.XA CN102636719B (en) | 2011-02-12 | 2011-02-12 | Detection circuit and detection system for detecting pin abnormality of differential pair in display interface |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102636719A CN102636719A (en) | 2012-08-15 |
| CN102636719B true CN102636719B (en) | 2014-11-05 |
Family
ID=46621188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110038125.XA Expired - Fee Related CN102636719B (en) | 2011-02-12 | 2011-02-12 | Detection circuit and detection system for detecting pin abnormality of differential pair in display interface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102636719B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1366186A (en) * | 2001-12-31 | 2002-08-28 | 技嘉科技股份有限公司 | Open circuit/short circuit detector and its detection method |
| US7387542B1 (en) * | 2007-06-07 | 2008-06-17 | Sony Corporation | HDMI connector |
| CN201570629U (en) * | 2009-11-20 | 2010-09-01 | 富港电子（东莞）有限公司 | HDMI micro connector |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3337972B2 (en) * | 1998-03-12 | 2002-10-28 | 矢崎総業株式会社 | Disconnection / short detection circuit |
-
2011
- 2011-02-12 CN CN201110038125.XA patent/CN102636719B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1366186A (en) * | 2001-12-31 | 2002-08-28 | 技嘉科技股份有限公司 | Open circuit/short circuit detector and its detection method |
| US7387542B1 (en) * | 2007-06-07 | 2008-06-17 | Sony Corporation | HDMI connector |
| CN201570629U (en) * | 2009-11-20 | 2010-09-01 | 富港电子（东莞）有限公司 | HDMI micro connector |
Non-Patent Citations (1)
| Title |
|---|
| JP特开平11-258300A 1999.09.24 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102636719A (en) | 2012-08-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5683696B2 (en) | Detecting cable connections for electronic devices | |
| US20160105747A1 (en) | Electronic device and method for detecting plug type of audio device inserted into electronic device | |
| US20100164509A1 (en) | Detecting system for detecting connection of connectors and connector assemblies having same | |
| JPWO2013099069A1 (en) | communication cable | |
| CN102830323B (en) | Device and method for detecting welding abnormality of electrostatic discharge protection chip | |
| CN112485934B (en) | Hot plug detection method and related device for LED display screen | |
| US10664371B2 (en) | Differential physical layer device with testing capability | |
| US9103867B2 (en) | Apparatus and method for detecting the abnormal soldering of an electrostatic discharge protection chip | |
| US20100061027A1 (en) | Interface circuit with electro-static discharge protection circuit | |
| US9083175B2 (en) | Protection circuit | |
| CN102636719B (en) | Detection circuit and detection system for detecting pin abnormality of differential pair in display interface | |
| US20150022969A1 (en) | Computer case with recorded open and closed states | |
| CN103376577A (en) | Automatic test method and system for liquid crystal display panel with LVDS (low voltage differential signaling) interface | |
| CN205958686U (en) | Wiring detection circuitry | |
| US8604802B2 (en) | Checking circuit for serial port connectors | |
| CN202083765U (en) | High definition multimedia interface (HDMI) open short circuit test device | |
| US9960886B2 (en) | Noise detection device | |
| CN108401360B (en) | The detection method of flexible circuit board, detection device and display panel | |
| TWI403735B (en) | Detection of the interface of the differential detection of the pin error detection circuit and its detection system | |
| CN203825133U (en) | VGA cable testing instrument | |
| US20130080622A1 (en) | Network status indication system and mouse with network status indication function | |
| US9601872B2 (en) | Anti-interference high-definition multimedia interface | |
| US9478919B1 (en) | Connection detection system and detection device | |
| US20140327456A1 (en) | Detecting circuit for fan installation | |
| CN206077615U (en) | HDMI outut devices |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141105 Termination date: 20150212 |
|
| EXPY | Termination of patent right or utility model |