CN1940581A - Method and device for inspecting display unit connecting state - Google Patents
Method and device for inspecting display unit connecting state Download PDFInfo
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- CN1940581A CN1940581A CN 200510107986 CN200510107986A CN1940581A CN 1940581 A CN1940581 A CN 1940581A CN 200510107986 CN200510107986 CN 200510107986 CN 200510107986 A CN200510107986 A CN 200510107986A CN 1940581 A CN1940581 A CN 1940581A
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Abstract
A method for detecting connection state of display device includes utilizing detection unit to detect connection state of display device plug and display device socket, sending detected signal to system and judging that display device is connected on if detected signal presents that display device plug and display device socket is physically connected on or otherwise judging that display device is not connected on. The detection device used for realizing said method is also disclosed.
Description
Technical field
The present invention relates to display device, relate in particular to the pick-up unit that detects display unit connecting state, the present invention provides a kind of method that detects display unit connecting state simultaneously.
Background technology
In technical field of electricity, usually use display device to provide operation information to the user.Be to show more contents, reason such as conveniently watch, need to adopt a plurality of display devices sometimes.For example, same computing machine only connects a display device sometimes, need connect a plurality of display devices sometimes, at this moment just need switch between a display device and a plurality of display device.Realize that these switchings need carry out complicated setting, comprise single display device display mode is converted to the mode of extension that multi-display equipment shows, perhaps opposite.This just uses the process of multi-display equipment comparatively complicated.For this reason, prior art provides some methods to set up of switching external connection display equipment comparatively easily, for example:
1, in the setting of the enterprising enforcement of keyboard of notebook computer with the mode of extension of a plurality of display devices.After plugging external connection display equipment, by the screen switch key on the keyboard, switch to A respectively according to the order of button: display device shows on the notebook; B: show on the external connection display equipment; C: notebook display device and external connection display equipment are equipped with common the demonstration.
2, in operating system, use control panel to select display mode
3, setting display mode on the controlling and driving application program of display card
4, the method on the THINK PAD notebook computer, shortcut is set on keyboard, can select display mode easily, and can write down the setting that all were once used, after powering on next time or hanging up answer, whether have display device exist, and return to original setting if can detect automatically.
The common issue with that above prior art exists is: display mode can't be set after the plug external connection display equipment in real time automatically, and need reset behind the plug display device.Such as: after plugging external connection display equipment, adopt manual mode that display mode is become the expansion display mode, but after pulling out external connection display equipment, can't keep automatically returning to single display device display mode under the open state, owing to can not after pulling out external connection display equipment, see in content displayed on the external connection display equipment and window, make operation inconvenience.
After realizing plugging display device display mode is set automatically in real time, after precondition is the plug display device, main frame can detect the change of display unit connecting state at once, so just can make main frame carry out the automatic setting of display mode according to the situation that display device connects.
Prior art provides plurality of proposals for detecting display unit connecting state.But all there are a lot of problems in actual use in these methods, and the real-time detection of display unit connecting state can't be realized.
For example, show in electronic equipment normal structure (VESA) standard and stipulate: at video and graphic serial interfaces (the VGA interface of digital visual interface (DVI interface) and simulation, I2C and EDID (expansion shows identity data) data line is set Video Graphics Array interface), be used to make PC to obtain the information that display device connects, and by the parameter on the reading displayed equipment, comprise manufacturer, product type, the filtrator model, the sequential that shows, the size of demonstration, brightness, information such as dot matrix make the PC system that the parameter of display device is set automatically.Wherein, I2C and EDID are collectively referred to as DDC (DDC, DISPLAY DATA CHANNEL).But there is following problem in said method:
At first, because the reason of cost, a lot of display device producers save this partial circuit.Owing to read less than the parameter on the display device, whether the PC system also is unable to find out display device and connects.This makes PC pass through the connection that this kind mode detects display device and can't realize.
Secondly, realize going automatically the reading displayed device parameter, also need display adapter one end can discern display device automatically and whether connect, require display adapter to initiate query task automatically, notify PC system then.Same because cost also often omits the I2C circuit at this end of display adapter, perhaps pin ground connection, and this just makes automatic detection that external connection display equipment is set and can't realize.
In addition, the development of technology makes non-IT industry also use various display devices in a large number, but the VESA normal structure can only relate to the display device that is connected with PC, multiple display device outside the PC connects and all can't relate to, therefore, field of display devices does not still have to cover the connection standard of all display devices.
The United States Patent (USP) of patent No. US2002149541 has disclosed the method that a kind of PC is connected with a plurality of display devices.This method can be supported digital distance scope and analog display device, provides the display device cable to connect monitor, and sets double screen according to the connection status of the cable of display device and show.But,, therefore still can't realize detecting in real time the connection of display device because the method that this patent provides need be provided with testing circuit on display adapter, and only just works when the PC system initialization.
The patent No. be US6329983 U.S. Patent Publication another technical scheme, this technical scheme makes main frame can in time detect the situation that S terminal or vision signal have connected.But this technical scheme can only solve the joint detection problem of vision signal, and need be provided with according to loading condition at signal output part equally and judge the testing circuit that whether connects, and also can only carry out the state setting initialized the time.In addition, the electrical specification of external connection display equipment varies, a lot of not compliant requirements of display device, and therefore, there are a lot of compatible problems in the detection of using electric signal to carry out display unit connecting state.
In a word, the technical scheme that prior art provides or in display interface, reserve the I2C bus, perhaps direct data detection signal.No matter use above-mentioned which kind of scheme, all need the cooperation of display adapter testing circuit and driver.At first, display adapter will detect the connection of display device in real time, and the state of display device must be measured or read to its testing circuit; Secondly, the display device state notifying operating system that the driver of display adapter need in time record.Therefore, there is following shortcoming in above-mentioned prior art:
1, cost height.Adopt the VESA standard to need display device to provide to deposit the memory storage of self parameter, and display adapter need have the circuit that reads these parameters, and to the function of System Reports; If the method that adopts data-signal to gather then need testing circuit is set on the display adapter, and the load type of external connection display equipment is various, therefore can't detect situation accurately all the time.
2, intermediate link is too much.Prior art is by the detection of display adapter realization to display unit connecting state, and testing result need be delivered to mainboard through connecting slot by display adapter, is delivered to system through bus again.Because the intermediate link of control is many, reliability is lower.
3, can't take into account various types of display device interfaces, such as the display interface beyond the VESA standard.
4, be difficult to realize to automatically switch the in real time display mode of display device.
In sum, detect the method for display unit connecting state under the prior art, have more defective, can't satisfy plug and play, promptly pull out the requirement of promptly walking; Address this problem, must look for another way.
Summary of the invention
At above-mentioned defective, the technical matters that the present invention solves is to provide the pick-up unit and the detection method of display unit connecting state, this kind method does not need attachment plug, the socket of existing display device and display adapter are done any improvement, just can realize the detection of display device plug, thereby for the plug and play of multi-display equipment, promptly pull out promptly to walk, and change the display device display mode automatically technical foundation is provided.
The device of detection display unit connecting state provided by the invention, the demonstration detecting unit that comprises the interface that is installed on display device and system's grafting, whether insertion system shows socket physically to detect display device signal wire plug, and produces detection signal output according to detection case; Signal lines, the detection signal that transmits described demonstration detecting unit acquisition is to system control unit; System control unit according to the detection signal that receives, judges whether the display device plug inserts main frame and show socket, when judging that the display device plug has inserted main frame demonstration socket, judges that display device connects.
Above-mentioned demonstration detecting unit can have multiple implementation.Below be several preferably embodiments.
A kind of structure that adopts mechanical type to realize described demonstration detecting unit is as follows: this demonstration detecting unit has: first contact; Vertical with main frame display device interfaces socket or be bordering on vertically arranged pole, one end in contact or approach the display device interfaces jack housing, and this holds and is that inclined-plane, its other end are second contact, and this pole has electric conductivity; Described pole is pushed down to the socket radial center by shell fragment; When the display device plug insertion socket, the beveled end of described pole is crossed with its jack-up by plug outsourcing Tie Tong, and second contact of the pole other end is contacted with described first contact; Contacting and not contacting two states of first contact and second contact produces the output of relevant detection signal.
A kind of mode that adopts optical mode to realize described detection display unit is: described demonstration detecting unit comprises the mirror surface of being located at the interface socket shell; Be located at the light source that the above system of casing shows the socket installation site; And photosensitive device; When the display device plug did not insert main frame and shows socket, the light that described light source sends can be through the direct reflection of jack housing to described photosensitive device; When display device plug insertion system showed socket, the light ray propagation route was blocked, and photosensitive device can't receive reflected light; Above-mentioned two states produces the output of relevant detection signal.
A kind of mode that adopts the light source detection mode to realize described detection display unit is: described demonstration detecting unit is included on the casing that main frame demonstration socket is installed and shows the light source that install at the overhanging place of socket, the receiver that the opposite side of the casing relative with this light source is installed than main frame; The light signal that the installation site of described light source and receiver is sent light source can pass through from the socket edge, and described receiver can receive its light that sends; When socket inserted, the bang path of light was blocked, and receiver can't receive light; Above-mentioned two states produces the output of relevant detection signal.
Preferably, described light source is an infrared light sources, and described receiver is an infrared receiver.
A kind of detection display unit that adopts mechanical interlock mode to realize is as follows: described demonstration detecting unit has the restraining mass that is arranged at main frame demonstration socket, when the display device plug does not show that with system socket is connected, this restraining mass blocks system and shows socket, the display device plug can't be inserted, when needs insert described system demonstration socket with the display device plug, described restraining mass must be pushed aside; Detector switch, the action of described restraining mass can trigger this detector switch, and the signal of its generation is exported as detection signal.
Preferably, described restraining mass is that main frame shows receptacle cover plate, and when insertion system showed socket, the system that covers in showed socket to this cover plate at the display device plug; When display device plug insertion system showed socket, this cover plate was opened.
Preferably, described restraining mass is a tumbler switch.
The present invention provides a kind of method that detects display unit connecting state simultaneously, comprising:
1) detects the physical connection state that display device plug and main frame show socket;
2) send detection signal to system control unit;
3) judge that according to this detection signal display device plug and main frame show whether physical connection of socket; Described physical connection is meant whether the display device plug inserts main frame display device socket, and actual connection whether on wherein the display signal line electrical equipment no matter; If then enter step 4); If not, then enter step 5);
4) judge that display device connects;
5) judge that display device does not connect.
Preferably, the detection of described step 1) realizes by the demonstration detecting unit that is installed on main frame demonstration socket one side.
With respect to prior art, the present invention has following beneficial effect.
At first, technical scheme provided by the invention need not display device and display adapter provides special testing circuit.Therefore, this technical scheme is less to the change of components and parts, especially need not to change integrated circuit, can save cost.
Secondly, technical scheme provided by the invention can be avoided intermediate link, and directly the detection signal with the display device plug is passed to system, and therefore, this kind detection mode is more reliable.
The 3rd, technical scheme provided by the invention is not subjected to the influence of display device, display adapter type, has favorable compatibility, display device that can compatible total interface band plugs and sockets.
Description of drawings
Fig. 1 is the block diagram of detection method of the present invention;
Fig. 2 is the process flow diagram of detection method of the present invention;
Fig. 3 is the structural drawing of first embodiment of the invention;
Fig. 4 is the structural drawing of second embodiment of the invention;
Fig. 5 is the situation behind the second embodiment of the invention plug insertion socket;
Fig. 6 is the synoptic diagram of third embodiment of the invention;
Fig. 7 is the synoptic diagram of fourth embodiment of the invention;
Fig. 8 is the synoptic diagram of fifth embodiment of the invention;
Fig. 9 is a detection signal transfer process synoptic diagram of the present invention.
Embodiment
Basic ideas of the present invention are, at main frame the device that detects display unit connecting state are set, and this device can detect the display device plug and whether show (equipment) socket physical connection with main frame; If connect, think that then display device connects.
Please referring to Fig. 1, this figure is the block diagram of basic technical scheme provided by the invention.
The display adapter of main frame 13 shows that by main frame socket 12 connects display device plug 11.Show that detecting unit 14 is used to detect the physical connection situation of described display device interfaces plug 11 and display device interfaces socket 12, the detection signal of its generation is sent to main frame I/O controller by signal lines 15, be delivered to master machine control unit through main frame I/O controller, master machine control unit judges that according to this detection signal described display device plug and described main frame show whether physical connection of socket; And, when judging both physical connections, promptly be considered as display device and main frame is in connection status.Described physical connection is meant main frame shows whether socket 12 and display device plug 11 peg graft, no matter and its interconnector whether reality connects.Though this determination methods may mistake not occur owing to reality is electrically connected, in most cases, judged result is correct.And this kind determination methods need not the electric cooperation of display driver circuit, display device etc., has better compatibility.
Please, be the process flow diagram of detection method provided by the invention referring to Fig. 2.
Step S21, beginning.
Step S22 detects the connection status that display device plug 11 and main frame show socket 12, and sends detection signal to system.
The detection of this connection status, it specifically is the physical connection state that directly detects display device plug 11 and host interface socket 12, its detection method is varied, but must be directly to detect display device plug 11 to show the physical connection state of socket 12, rather than detect the connection status of the lead of display device plug 11 and main frame demonstration socket 12 with main frame.
The detection signal that produces sends system to, specifically is sent to where to determine according to system situation.In the personal computer PC system, can be sent to the I/O controller, send operating system to by the I/O controller again.Detection method provided by the invention, have extensive applicability, not only be applicable to PC or other computer system, every system that needs to detect display unit connecting state can adopt this method, therefore, the transfer path of the detection signal of generation should depend on the circumstances.The load mode of described detection signal can be to send to system by interrupt mode, also can adopt inquiry mode to obtain this detection signal by system.
Step S23 judges that display device plug 11 and main frame show whether socket 12 is connected.If then enter step S24; If not, then enter step S25.
The detection signal that system obtains according to step S22 carries out the judgement of display device plug 11 and main frame demonstration socket 12 connection status, and concrete determination methods determines according to the pick-up unit of concrete employing.No matter which kind of detection method, its detection signal all are to show socket 12 and display device plug 11 physical connections and physical separation two states according to main frame, produce the electric signal of different electricity conditions; System judges that according to this electric signal main frame shows the physical connection state of socket 12 and display device plug 11.
Step S24, system judge that display device connects.
As long as detect the physical connection state that is in that display device plug 12 and main frame show socket 12, just judge that display device is connected with main frame on electric.
After judging that display device has connected, system can handle accordingly.For example, change display mode, needed shows signal and video data are sent on this external display device.
Step S25, system judge that display device does not connect.
As long as detect display device plug 11 and main frame show mouthful socket 12 for the physical separation state, judge that then display device is not connected with main frame on electric.If originally the display device state is for connecting, then system can change display mode according to the variation of connection status.
More than the method for explanation detection display unit connecting state provided by the invention shows that wherein detecting unit 14 has multiple implementation method, and following examples explanation shows the multiple implementation of detecting unit 14.
Please referring to Fig. 3, be the structural drawing of the demonstration detecting unit of first embodiment of pick-up unit provided by the invention.This illustrates a demonstration detecting unit that is applied to the Mechanical Contact formula pick-up unit of notebook computer.
This notebook computer itself is equipped with LCD display, and this display screen is the default display device of notebook.Simultaneously, this notebook computer has external VGA interface, is used to connect external display or projector.The socket 35 of this VGA interface is a cellular type, and plug 36 is a pin type.
As shown in Figure 3, the pole 30 that can slide up and down is set above socket 35, and this pole 30 is adopted has the material of electric conductivity, passes the host machine casing 37 of mounting receptacle 35, and with the housing contacts of socket 35 or approach, and be the inclined-plane with a end that socket 35 contacts or approaches.When plug 36 did not insert, pole 30 was pushed down by the shell fragment of its top, and first contact 32 does not contact with second contact 33.When plug 36 inserted left, the outer iron clad of plug was partly run into the inclined-plane of pole 30 bottoms, with pole 30 jack-up upwards, first contact 32 was contacted with second contact 33.Described first contact 32 connects power Vcc by resistance 31, the outer iron clad part welding system ground wire of socket, so when two contacts contact, signal drop-down be low level; When plug 36 was pulled out, unclamped the contact, and signal wire is high level Vcc.Above-mentioned detection signal sends to master machine control unit, and master machine control unit judges according to the signal that is received whether the display device plug shows that with main frame socket is connected.
The pick-up unit that present embodiment provides is applicable to that plug body surrounded the display device interfaces of socket when the display device plug inserted main frame demonstration socket.
Please, be the synoptic diagram of second embodiment of the invention referring to Fig. 4.This embodiment provides a kind of device that adopts photosensitive mode to detect display unit connecting state.This kind detection mode can be applied to main frame and show the jack housing smooth surface, has reflecting effect, can encase the connector that main frame shows socket after the display device plug inserts simultaneously.This scheme is in particular for the situation of mechanical detection device because of being subjected to space constraint to be not easy to realize of first embodiment.
As shown in Figure 4, main frame shows that socket 44 shells have mirror surface 46, at the casing that this main frame demonstration socket 44 is installed light source 41 is housed, and this light source 41 specifically can adopt light emitting diode or other luminescent device.Photosensitive device 43 also is housed on casing, and this photosensitive device 43 can be photodiode or devices such as phototriode, photoresistance.When display device plug 45 did not insert main frame demonstration socket 44, the light of described light source 41 emissions can shine main frame and show on the mirror surface 46 of socket 44 shells, and process mirror surface 46 reflexes on the photosensitive device 43.For preventing photosensitive device 43 misoperations, between described light source 41 and described photosensitive device 43, light barrier 42 is installed, make light source to show that mirror surface 46 reflections of socket 44 just can be delivered on the photosensitive device 43 by main frame.
Please referring to Fig. 5, this illustrates the situation after display device plug 45 inserts main frame demonstration socket 44.After plug 45 inserted socket 44, plug 45 surrounded socket 44 shells, and the space between socket 44 and the light source 41 all is filled, and light source 41 can't reflex on the photosensitive device 43 by the mirror surface 46 of socket 44.Above-mentioned inserting state changes the change of the electricity condition of the photosensitive device 43 that causes, produces a detection signal and gives system.
Please, be the synoptic diagram of third embodiment of the invention referring to Fig. 6.This embodiment adopts ultrared sensing to realize the detection of display device connection state.
The technical scheme that this embodiment provides can be used for all unaccommodated occasion of above-mentioned dual mode.As digital video interface socket (DVI socket, Digital Video Interface), its form is a pin type socket cellular type plug, and the plug external dimensions is littler than socket.This kind interface shape both had been not suitable for mechanical type, did not also have the condition of direct reflection, and can adopt the insertion of ultrared sensing test plug this moment.
As shown in Figure 6, show that than main frame socket 63 overhanging about 1 to 2 millimeter are equipped with infrared light supply 62 on the casing 65 of main frame, the opposite side of the casing 65 relative with this infrared light supply 62 is equipped with infrared remote receiver 64.The installation site of described infrared light supply 62 and infrared remote receiver 64 can be just passed through infrared signal from the edge of socket 62, make infrared remote receiver 64 can receive the infrared ray that it sends.
When display device socket 61 inserted, the bang path of Infrared was blocked fully, and infrared remote receiver 64 can't receive infrared ray, thereby produced the signal that a plug inserts, and sent system to.
Described infrared light supply 62 is the positions of suitably stretching out on host machine casing 65 with the installation site of infrared remote receiver 64, can be about, also can be at the right and left.
Please, be the structural drawing of fourth embodiment of the invention referring to Fig. 7.Wherein, Fig. 7 a is the main frame demonstration socket plan view of this embodiment; Fig. 7 b is the capping plan view of this embodiment; Fig. 7 c is the vertical view of the capping closed condition of this embodiment; Fig. 7 d is the vertical view of capping open mode.Below this figure is explained.
Shown in Fig. 7 a, main frame shows that socket 71 has capping mount pad 72, is that fulcrum can be installed capping 73 with this capping mount pad.Shown in Fig. 7 b, 7c, this capping 73 has capping mainboard 76, capping side plate 78, and its material generally adopts plastics or elastomeric material.Described capping mainboard 76 is equipped with socket cover 79, and described capping side plate 78 is connected with capping mount pad 72, and whole capping 73 is obtained and being connected of socket 71.Side away from capping side plate 78 of described capping mainboard 76 has projection 77, and its effect is to make the user can scratch this projection 77, and capping 73 is drawn back.Not during patchplug, this capping 73 covers socket under the flexible effect of capping side plate 78, and is attractive in appearance to obtain, and prevents the intrusion of dust, water, the effects such as electrical connection circuit of protection socket 71 and socket the inside at socket 71; When this socket 71 inserts plug, need serve as that axle draws back (shown in Fig. 7 d) with capping mount pad 72 with capping 73, could insert plug.
Shown in Fig. 7 b, Fig. 7 c, first contact 74, second contact 75 are set in the junction of capping 73 and host machine casing (figure does not show).Wherein, second contact 75 can be subjected to the extruding of capping side plate 78 when capping is opened, and this second contact 75 produces micro displacement thus.This displacement is enough to make second contact 75 to contact with first contact 74, thereby sends detection signal.Capping 73 is in state when opening shown in Fig. 7 d, and this moment, first contact 74 contacted with second contact 75 as can be seen.
Because the display device interfaces of many electrical equipments is equipped with capping, can utilize these cappings, the contact is installed, realize detection to the physical state of display device plug connection.
Please, be the synoptic diagram of fifth embodiment of the invention referring to Fig. 8.
Among this embodiment, tumbler switch 82 is set on the display device socket 81, has only this tumbler switch 82 is pushed aside, be located at position II, the plug of external connection display equipment just can be inserted into main frame and show on the socket 81.Stirring this tumbler switch 82 in the II of position, this tumbler switch 82 produces detection signal, notifying operation system.When display device plug (figure do not show) when extracting, this tumbler switch 82 is under the torsion spring effect of (figure does not show), be positioned at and block the position I that main frame shows socket 81, make the display device plug can't insert main frame and show socket 81, the state of detection signal also changes simultaneously.With upper type, can make system obtain the display device plug and show the state that socket 81 is connected, and change display apparatus mode in view of the above with main frame.
The detection signal that above-described pick-up unit obtains outputs to master machine control unit, after system receives this signal, make the judgement of display unit connecting state, and carry out the display mode setting in view of the above, thereby the plug and play of realization display device promptly pulls out promptly.Fig. 9 is illustrated in an example of above-mentioned transport stream signal journey in the computing machine, should illustrate that detection method provided by the invention goes for the occasion of various use display devices, not only is confined to computing machine.Transport stream signal journey under the different situations should be determined as the case may be.
Show among Fig. 9 that connector 91 is the display device plug of various embodiments of the present invention, main frame shows socket; Display device detecting unit 92 is the pick-up unit of mechanical type, photosensitive formula or infrared detection type or other form; The detection signal that this display device detecting unit 92 produces outputs to input/output control unit 93, after input/output control unit 93 reads this signal, sends operating system 95 to through system control interface 94, and operating system is carried out respective handling according to this signal.
Should be understood that, detection scheme provided by the invention can be used for various display devices, include but not limited to various types of displays, televisor, dot matrix display device, LED charactron display device, projector, be used for the magnetic driven board turning display screen of airplane flight demonstration etc. etc.,, can adopt apparatus and method provided by the invention to detect display unit connecting state as long as its display device interfaces adopts plugs and sockets form to connect.In addition, for other external unit that need be connected with plug, socket mode with main frame, can consider to detect in this way its connection status in case of necessity equally.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1, a kind of device that detects display unit connecting state, it is characterized in that comprising, be installed on the demonstration detecting unit of the interface of display device and system grafting, whether insertion system shows socket physically to detect display device signal wire plug, and produces detection signal output according to detection case; Signal lines, the detection signal that transmits described demonstration detecting unit acquisition is to system control unit; System control unit according to the detection signal that receives, judges whether the display device plug inserts main frame and show socket, when judging that the display device plug has inserted main frame demonstration socket, judges that display device connects.
2, device according to claim 1 is characterized in that, described demonstration detecting unit has: first contact; Vertical with main frame display device interfaces socket or be bordering on vertically arranged pole, one end in contact or approach the display device interfaces jack housing, and this holds and is that inclined-plane, its other end are second contact, and this pole has electric conductivity; Described pole is pushed down to the socket radial center by shell fragment; When the display device plug insertion socket, the beveled end of described pole is crossed with its jack-up by plug outsourcing Tie Tong, and second contact of the pole other end is contacted with described first contact; Contacting and not contacting two states of first contact and second contact produces the output of relevant detection signal.
3, device according to claim 1 is characterized in that, described demonstration detecting unit comprises: the mirror surface of being located at the interface socket shell; Be located at the light source that the above system of casing shows the socket installation site; And photosensitive device; When the display device plug did not insert main frame and shows socket, the light that described light source sends can be through the direct reflection of jack housing to described photosensitive device; When display device plug insertion system showed socket, the light ray propagation route was blocked, and photosensitive device can't receive reflected light; Above-mentioned two states produces the output of relevant detection signal.
4, device according to claim 1 is characterized in that, described demonstration detecting unit is included on the casing that main frame demonstration socket is installed and shows the light source that install at the overhanging place of socket, the receiver that the opposite side of the casing relative with this light source is installed than main frame; The light signal that the installation site of described light source and receiver is sent light source can pass through from the socket edge, and described receiver can receive its light that sends; When socket inserted, the bang path of light was blocked, and receiver can't receive light; Above-mentioned two states produces the output of relevant detection signal.
5, device according to claim 4 is characterized in that, described light source is an infrared light sources, and described receiver is an infrared receiver.
6, device according to claim 1, it is characterized in that, described demonstration detecting unit has the restraining mass that is arranged at main frame demonstration socket, when the display device plug does not show that with system socket is connected, this restraining mass blocks system and shows socket, the display device plug can't be inserted, when needs insert described system demonstration socket with the display device plug, described restraining mass must be pushed aside; Detector switch, the action of described restraining mass can trigger this detector switch, and the signal of its generation is exported as detection signal.
7, device according to claim 6 is characterized in that, described restraining mass is that main frame shows receptacle cover plate, and when insertion system showed socket, the system that covers in showed socket to this cover plate at the display device plug; When display device plug insertion system showed socket, this cover plate was opened.
8, device according to claim 6 is characterized in that, described restraining mass is a tumbler switch.
9, a kind of method that detects display unit connecting state is characterized in that, comprising:
1) detects the physical connection state that display device plug and main frame show socket;
2) send detection signal to system control unit;
3) judge that according to this detection signal display device plug and main frame show whether physical connection of socket; Described physical connection is meant whether the display device plug inserts main frame display device socket, and actual connection whether on wherein the display signal line electrical equipment no matter; If then enter step 4); If not, then enter step 5);
4) judge that display device connects;
5) judge that display device does not connect.
10, method according to claim 9 is characterized in that, the detection of described step 1) realizes by the demonstration detecting unit that is installed on main frame demonstration socket one side.
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| CN200510107986A CN100590441C (en) | 2005-09-30 | 2005-09-30 | Method and device for inspecting display unit connecting state |
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| CN200510107986A CN100590441C (en) | 2005-09-30 | 2005-09-30 | Method and device for inspecting display unit connecting state |
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| CN100590441C CN100590441C (en) | 2010-02-17 |
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| CN102998576A (en) * | 2011-09-09 | 2013-03-27 | 株式会社日本显示器东 | Connector connection checking circuit and method, display device and manufacturing method thereof |
| CN104296840A (en) * | 2014-10-29 | 2015-01-21 | 扬州恒信仪表有限公司 | Device and method for multichannel electric appliance parameter acquisition |
| CN108268090A (en) * | 2016-12-30 | 2018-07-10 | 维沃移动通信有限公司 | A kind of interface protector, mobile terminal and method |
| CN109427289A (en) * | 2017-08-31 | 2019-03-05 | 西安诺瓦电子科技有限公司 | Display control program and remote monitoring method |
| CN109828733A (en) * | 2019-01-07 | 2019-05-31 | 武汉深之度科技有限公司 | A kind of method that multiple display terminals are independently shown calculates equipment |
| CN111812554A (en) * | 2020-07-24 | 2020-10-23 | 上海星融汽车科技有限公司 | On-board diagnostic (OBD) interface plug-pull state detection device based on photoresistor and detection method thereof |
| CN113400942A (en) * | 2020-02-28 | 2021-09-17 | 株洲中车时代电气股份有限公司 | Controller high-voltage interlocking detection method and device and controller |
-
2005
- 2005-09-30 CN CN200510107986A patent/CN100590441C/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101135710B (en) * | 2007-08-08 | 2010-12-08 | 中兴通讯股份有限公司 | Circuit for detecting radio-frequency power amplifier output terminal port communicating condition |
| CN102998576A (en) * | 2011-09-09 | 2013-03-27 | 株式会社日本显示器东 | Connector connection checking circuit and method, display device and manufacturing method thereof |
| CN102998576B (en) * | 2011-09-09 | 2015-07-15 | 株式会社日本显示器 | Connector connection checking circuit and method, display device and manufacturing method thereof |
| CN104296840A (en) * | 2014-10-29 | 2015-01-21 | 扬州恒信仪表有限公司 | Device and method for multichannel electric appliance parameter acquisition |
| CN104296840B (en) * | 2014-10-29 | 2018-05-15 | 扬州恒信仪表有限公司 | Multi-channel electrical equipment parameter harvester and multi-channel electrical equipment parameter acquisition method |
| CN108268090A (en) * | 2016-12-30 | 2018-07-10 | 维沃移动通信有限公司 | A kind of interface protector, mobile terminal and method |
| CN109427289A (en) * | 2017-08-31 | 2019-03-05 | 西安诺瓦电子科技有限公司 | Display control program and remote monitoring method |
| CN109828733A (en) * | 2019-01-07 | 2019-05-31 | 武汉深之度科技有限公司 | A kind of method that multiple display terminals are independently shown calculates equipment |
| CN109828733B (en) * | 2019-01-07 | 2022-03-29 | 武汉深之度科技有限公司 | Method and computing device for respectively and independently displaying multiple display terminals |
| CN113400942A (en) * | 2020-02-28 | 2021-09-17 | 株洲中车时代电气股份有限公司 | Controller high-voltage interlocking detection method and device and controller |
| CN111812554A (en) * | 2020-07-24 | 2020-10-23 | 上海星融汽车科技有限公司 | On-board diagnostic (OBD) interface plug-pull state detection device based on photoresistor and detection method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100590441C (en) | 2010-02-17 |
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