CN1641369A - Audio-visual plug detection device and method thereof - Google Patents

Abstract

A video plug detection device and a method thereof are used for a video device. The audio/video device is used for outputting a plurality of audio/video signals. The audio-visual plug comprises a plurality of contact sections. The detection device comprises the following components. The socket is used for accommodating the audio-video plug; the segment number detector is used for detecting the number of contact segments of the video plug; a controller for determining a plurality of possible output arrangements based on the number of the contact segments; the display circuit displays the possible output arrangements on the audio/video device in a menu mode, and a user can select one of the possible output arrangements as an active output arrangement through the menu.

Description

Audio-visual plug detection device and method thereof

technical field

The present invention relates to a plug detection device and its method, and in particular to an audio-visual plug detection device and its method.

Background technique

With the rapid development of science and technology, various audio-visual devices are also developed accordingly to meet the needs of consumers for entertainment or work. The audio-visual device is, for example, a DVD player, a VCD player, a digital camera, a digital video recorder, a CD player or an MP3 player, and the like.

In the case of a digital camera, it has an audio-visual output socket to output images and sounds. After an audio-visual plug coupled with the TV is inserted into the socket of the digital camera, the photos or videos stored in the digital camera can be played on the external TV for the convenience of users to watch.

In the case of a CD player, it has an audio output socket to output, for example, the audio of the left channel and the right channel. The external speakers or earphones are connected to the socket in the CD player through an audio plug to play the audio. The output specifications of the sockets used by various audio-visual devices are different.

1A and 1B are schematic diagrams of audio-visual plugs. FIG. 1A is a schematic diagram of a 3-section plug. The three-section plug 10 includes contact sections 11 and 13 at the front end of the plug and a contact section 15 at the rear end of the plug. The contact sections are separated by insulating sections 12 and 14 . Taking a CD player as an example, the configured plug is generally a 3-section type, and the contact sections receive the left channel, the right channel and ground respectively. Taking a digital camera as an example, if the configured plug is a 3-segment type, the contact segments may receive mono, video signal and ground respectively.

FIG. 1B is a schematic diagram of a 4-section plug. The 4-section plug 20 includes contact sections 21 and 23 at the front end of the plug and contact sections 25 and 27 at the rear end of the plug. The contact sections are separated by insulating sections 22 , 24 and 26 . Taking a digital camera as an example, if the configured plug is a 4-segment type, its contact segments may respectively receive the left audio channel, right audio channel, video signal and ground, or other different arrangements.

As mentioned above, the number of plug segments required by various audio-visual devices is different, and the definition of each contact segment is also different, so the plug of one audio-visual device cannot be used for other audio-visual devices. Nowadays, individuals often own more than one audio-visual device, and the many types of plugs are likely to cause confusion in use, and it is not easy to buy a plug of the same specification if it is lost.

Contents of the invention

In view of this, the purpose of the present invention is to provide a detection device and method for an audio-visual plug, which is used to detect the number of segments of the connector and define the signal arrangement output to the plug.

According to the object of the present invention, an audio-visual plug detection device is proposed for an audio-visual device. The audio-visual device is used for outputting multiple audio-visual signals. The AV plug includes a plurality of contact segments. The detection device includes the following components. The socket is used to accommodate the audio-visual plug; the section number detector is used to detect the number of contact sections of the audio-visual plug; the controller determines multiple possible output arrangements according to the number of these contact sections; the display circuit arranges these possible output arrangements as A menu is displayed on the audio-visual device, and the user can select one of the possible output arrangements as the active output arrangement through the menu.

According to another object of the present invention, a method for detecting an audio-visual plug is provided for an audio-visual device. The detection method includes: firstly, detecting whether the audio-visual plug is inserted; secondly, judging the number of contact sections of the audio-visual plug; then, displaying a menu according to the number of contact sections, the menu includes various arrangement options of these audio-visual signals, and then by The user selects one of the arrangement options as the output arrangement; finally, output the audio and video signals to the audio and video plug according to the output arrangement.

In order to further illustrate the above-mentioned purpose, structural features and effects of the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings.

Description of drawings

1A and 1B are schematic diagrams of audio-visual plugs.

FIG. 2 is a schematic diagram of an audio-visual plug detection device according to a preferred embodiment of the present invention.

Figure 3A is a menu of 4-section plugs.

Figure 3B is a menu of 3-section plugs.

Detailed ways

Please refer to FIG. 2 , which shows a schematic diagram of an audio-visual plug detection device according to a preferred embodiment of the present invention. The audio-visual plug detection device 200 is used in the audio-visual device 201 to detect the number of segments of an audio-visual plug 30 (plug) and define the signal sequence of the contact segments of the audio-visual plug 30. The audio-visual plug 30 is, for example, the 3-section plug 10 or FIG. 4-section plug 20 in 1B. The audio-visual device 201 is used for outputting audio-visual signals AV, such as audio and video. The audio-visual plug detection device 200 includes a jack 210 , a plug detector 220 , a segment number detector 230 , a battery 232 , a switch SW, a controller 250 and a multiplexer 240 .

The socket 210 is used for accommodating the audio-video plug 30 . The insertion detection unit 220 is used to detect whether the audio-video plug 30 is inserted into the socket 210 . The segment number detection unit 230 determines the number of contact segments of the audio-visual plug 30 after the audio-visual plug 30 is inserted into the socket 210 . The controller 250 provides a menu for the user to determine the arrangement and combination suitable for the output signal of the current plug, and then the multiplexer 240 outputs the signal accordingly.

Socket 210 includes metal shrapnel S1, S2, S3 and socket frame S4. Each metal shrapnel has a contact point. When the audio-visual plug 30 is inserted into the socket 210, each contact point is used to electrically connect with one of the contact segments of the audio-visual plug 30. , the socket frame S4 is the ground terminal. The metal dome S1 is connected to the ground through the resistor R4. When the audio-visual plug 30 is not inserted into the socket 210, the power supply Vcc is electrically connected to the metal shrapnel S1 through the resistor R3 and the contact pin P. At this time, the signal on the contact pin P is low due to the voltage divider between the resistors R3 and R4. level.

When the audio-visual plug 30 is inserted into the socket 210 , the audio-visual plug 30 pushes down the metal dome S1 , so that the contact pin P is separated from the metal dome S1 , so the signal on the contact pin P at this time is a high potential. The insertion detection unit 230 is electrically connected to the contact pin P by the pin GPI01 , and judges whether the audio-visual plug 30 is inserted into the socket 210 according to the potential of the contact pin P.

When it is detected that the audio-visual plug 30 is inserted into the socket 210 , the number of contact segments of the audio-video plug 30 is detected. This embodiment is described by taking the detection of whether the audio-visual plug 30 is 3-segment or 4-segment as an example. From the plugs in Figure 1A and Figure 1B, it can be seen that the rear end of the 3-segment plug has one contact segment, and the rear end of the 4-segment plug has two contact segments, so the plug can be known by detecting whether the two positions at the front and rear of the rear end of the plug are short-circuited. the number of segments. The switch SW is used to control the electrical connection between the metal dome S3 and the resistor R1 or the audio-visual signal line OP3. The initial state of the switch SW is to electrically connect the metal dome S3 to the resistor R1. If the audio-visual plug 30 is a 3-section plug 10, the metal spring S3 and the socket frame S4 are electrically connected to the contact section 15 of the plug 10 at the same time, and the socket frame S4 is connected to the ground, so the potential of the metal spring S3 is also low. If the audio-visual plug 30 is a 4-section plug 20, the metal dome S3 and the socket frame S4 are electrically connected to the contact segments 25 and 27 respectively, so the potential on the metal dome S3 is high due to the power supply Vcc and the resistor R1. The segment number detector 230 is electrically connected to the metal dome S3 through the pin GPIO2, so the number of contact segments of the plug can be determined according to the level of the GPIO2.

When the output voltage of the accumulator 232 is at a low level, the switch SW is to electrically connect the metal dome S3 to the resistor R1; when the output voltage of the accumulator 232 is at a high level, the switch SW is to connect the metal dome S3 to the video signal line OP3 electrical connection. The accumulator 232 is electrically connected to the contact pin P. When the plug is not inserted into the socket 210 , the contact pin P is at a low potential, so the accumulator 232 has not yet started charging. When the plug has been inserted into the socket 210, the contact pin P is at a high potential, so the accumulator 232 starts charging. When the output voltage of the accumulator 232 is not enough to switch the switch SW, the stage number detector 230 is used to detect the stage number. When the accumulator 232 is charged enough to switch the switch SW, the switch SW will electrically connect the video signal line OP3 to the metal dome S3. The time from the insertion of the plug to the switching of the switch SW is obtained according to the values of the resistors R2 , R3 and the capacitor C1 .

When the plug is inserted into the socket 210 and the number of its contact segments has been detected, then the adjustment of the output arrangement of audio-visual signals is started. The controller 250 obtains the segment number of the audio-visual plug 30 from the segment number detector 230, and then displays a menu for the user to select an output arrangement. The menu is shown in FIG. 3A and FIG. 3B. Figure 3A is a menu of 4-section plugs, three output signals of left channel L, right channel R and video TV, so there are six possible output arrangements. Figure 3B is a menu of 3-section plugs. The 3-section plug can only output two types of signals, so it may be a signal of two channels or a signal of one channel and video, and there are six possible output arrangements. The controller 250 outputs a plurality of possible output arrays to the display circuit 252 according to the number of segments of the audio-video plug 30 . The display circuit 252 arranges and displays menus according to the possible outputs for the user to choose. The user can find the option suitable for the audio-visual plug in the menu as a function output arrangement. After selection, the multiplexer 240 will output the output signal AV of the audio-visual device 201 according to the selected function output arrangement by the signal Line OP1, OP2 and OP3 output.

Taking the audio-visual device 201 as a digital camera as an example, the display device used by the controller 250 may be a screen of the digital camera, and the menu provided by it may be displayed on the screen of the digital camera for the user to choose. If the imaging device 210 using the detection device has no screen to display, it can also be selected by means of keys or the like.

In this embodiment, the socket frame S4 is used as the ground terminal as an example for illustration, but one of the other metal shrapnel S1-S3 can also be used as the ground terminal, which is similar to the method proposed in this embodiment, and the invention can be used. Spirit to achieve, so I won't go into details here.

The audio-visual plug detection device disclosed in the above embodiments of the present invention can make the audio-visual device suitable for various audio-visual plugs, which is convenient for users to use the existing audio-visual plug to broadcast the signal of the audio-visual device to an external TV or speaker. It is not necessary to be limited to the customized plug specifications for the use of audio-visual devices.

Although the present invention has been described with reference to the current specific embodiments, those of ordinary skill in the art should recognize that the above embodiments are only used to illustrate the present invention, and other modifications can be made without departing from the spirit of the present invention. Various equivalent changes and modifications, therefore, as long as the changes and modifications to the above embodiments are within the spirit of the present invention, they will all fall within the scope of the claims of the present invention.

Claims (16)

1. An audio-visual plug detection device for an audio-visual device, the audio-visual device is used to output a plurality of audio-visual signals, the audio-visual plug includes a plurality of contact segments, the detection device includes: a socket for accommodating the audio-visual plug; A plug detector, used to detect whether the audio-visual plug is inserted into the socket; a segment number detector for detecting the number of the contact segments of the audio-visual plug; a controller that determines a number of possible output arrangements based on the number of contact segments; and A display circuit displays these possible output arrangements on the audio-visual device as a menu, through which a user can choose one of these possible output arrangements as an active output arrangement. 2 . The detection device according to claim 1 , further comprising a multiplexer, which outputs the video and audio signals to the audio and video plug through the socket according to the function output arrangement. 3. The detection device according to claim 2, wherein the socket comprises a first contact point, a second contact point, a third contact point and a fourth contact point, and the fourth contact point is a ground terminal, wherein, When the audio-visual plug is inserted into the socket, the potential of the first contact point is a first level, and when the audio-visual plug is inserted into the socket, the potential of the first contact point is thus changed to a second level, and, The contact sections of the audio-visual plug are respectively electrically connected to the first, second, third and fourth contact points. 4. The detecting device according to claim 3, further comprising a switch electrically connected to the third contact point, when the audio-visual plug is not inserted into the socket, the switch switches the third contact point coupled with a power source. 5. The detecting device as claimed in claim 4, wherein after the audio-visual plug has been inserted into the socket, the segment number detector checks whether the potentials of the third contact point and the fourth contact point are the same, and if so, The audio-visual plug is three-segment, otherwise it is four-segment. 6 . The detection device according to claim 4 , wherein the switch is to switch the third contact point to be coupled with the multiplexer after the detection by the segment number detector is completed. 7 . 7. The detection device as claimed in claim 6, wherein the switch is controlled by an electric accumulator, and when the audio-visual plug is inserted into the socket, the accumulator starts charging, and after a while, the accumulator The voltage rises to toggle the switch. 8. A detection method for an audio-visual plug, used in an audio-visual device, the audio-visual device is used to output multiple audio-visual signals, the audio-visual plug includes a plurality of contact segments, the detection method comprises: Detect whether the audio-visual plug is inserted; judging the number of these contact sections of the audio-visual plug; According to the number of these contact segments, a menu is displayed, the menu includes multiple arrangement options of these audio-visual signals, and then a user selects one of these candidate arrangement options as an output arrangement; and Output the video and audio signals to the audio and video plug according to the output arrangement. 9. The detection method as claimed in claim 8, characterized in that, the step of judging the number of plug sections judges whether the front and rear positions of the rear end of the audio-visual plug are short-circuited, if so, it is a three-stage type, otherwise it is a four-stage type. 10. A detection device for an audio-visual device, the audio-visual device can output multiple audio-visual signals to the first audio-visual plug or the second audio-visual plug, the first audio-visual plug includes three contact sections, the second audio-visual plug Consisting of four contact sections, the detection device consists of: a socket for accommodating one of the first audio-visual plug and the second audio-visual plug; a segment count detector arranged in the socket to detect the number of contact segments of an active audio-visual plug connected to the socket; a controller, which determines a plurality of possible output arrangements according to the number of contact segments detected by the segment number detector; and A display circuit displays these possible output arrangements on the audio-visual device as a menu, through which a user can choose one of these possible output arrangements as an active output arrangement. 11 . The detection device according to claim 10 , further comprising a multiplexer, outputting the audio-visual signals to the active audio-visual plug through the socket according to the active output arrangement. 12. The detection device according to claim 11, wherein the socket comprises a first contact point, a second contact point, a third contact point and a fourth contact point, and the fourth contact point is a ground terminal, wherein, When the active audio-visual plug is inserted into the socket, the potential of the first contact point is the first level, and when the active audio-visual plug is inserted into the socket, the potential of the first contact point changes to the second electric potential flat, and the contact sections of the active audio-visual plug are respectively an electrical connection with the first, second, third and fourth contact points 13. The detection device according to claim 12, further comprising a switch electrically connected to the third contact point, when the active audio-visual plug is not inserted into the socket, the switch is the The third contact point is coupled with a power source. 14. The detection device as claimed in claim 13, wherein, when the active audio-visual plug has been inserted into the socket, the segment number detector checks whether the potentials of the third contact point and the fourth contact point are the same, If so, the active audio-visual plug is the first audio-visual plug, otherwise it is the second audio-visual plug. 15 . The detection device according to claim 14 , wherein the switch is to switch the third contact point to be coupled to the multiplexer after the detection by the segment number detector is finished. 16 . 16. The detection device as claimed in claim 15, wherein the switch is controlled by a storage device, and when the active audio-visual plug is inserted into the socket, the storage device starts to charge, and after a period of time, the storage device starts to charge. The voltage to the appliance rises to toggle the switch.

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