KR20100021832A - An electronic device and method for operating thereof - Google Patents

Abstract

PURPOSE: An electronic device and a method for operating thereof are provided to eliminate the waste of unnecessary power consumption. CONSTITUTION: An external device is connected to the input-output part(150). According to the voltage level, the MICOM(120) determines the connection of the external device. The voltage level is detected in the input-output part. The power supply unit(130) switches the output of the power source for supply to the external device MICOM. According to the size of the voltage level of the set output terminal, the MICOM determines the connection of the external device among a plurality of output terminals of the input-output part.

Description

An electronic device and method for operating the electronic device

The present invention relates to a power supply device for an electronic device, wherein the power supply to an external device connectable to the electronic device is automatically switched according to a connection state of the external device, so that the standby device is not connected when the external device is not connected. It is about a power supply that can save power.

Electronic devices are generally used in homes and businesses, but may be used in special environments such as hospitals and nursing homes.

An electronic device that can be used in such a special environment may be a video device such as a TV, and a remote controller is wired to the video device so that a patient can control the operation of the video device on a personal bed. Is provided so that the audio signal provided from the video device is output through the speaker.

On the other hand, electronic devices used in such a special environment often have a strict safety standard in each country, and the external device connectable to the video device and its signal line are electrically separated from the main body of the video device. Is demanding.

In detail, a signal line for controlling the operation of the video device and a signal line for transmitting audio signals from the video device to the external device are provided between the external device and the video device, and a power line for supplying power to the external device. Equipped.

In this case, in general, the signal line is separated by the photo coupler and the power line is separated by the transformer for isolation between the video device and the external device.

1 is a view for explaining a concept of power separation between an image device and an external device connectable thereto.

FIG. 1 is a view illustrating a part of a power supply device of an electronic device, wherein power of 12 V DC is supplied to an external device through a secondary side of a transformer 12, and thus, between an image device and an external device, around the transformer 12. Power can be isolated. As a result, the external device may receive power from the power supply of the video device and perform a remote control function or a speaker function.

An external device for controlling the operation of an imaging device and outputting an audio signal provided from the imaging device is also called a pillow speaker. An example of an external device connected to the imaging device may be the pillow speaker. .

In this case, the patient should be able to control the operation of the imaging device by using the pillow speaker. To this end, power isolated from the imaging device to the pillow speaker should be supplied.

In order to supply the isolated power to the pillow speaker, the power supply of the imaging device further includes a DC-AC converter 11 for converting a DC voltage into an AC voltage in addition to the transformer 12. The AC voltage output from the AC converter 11 is transformed by the transformer 12 and then supplied to the pillow speaker.

Since the pillow speaker is generally connected to the video device for a long time, an electronic device provided with a power supply device according to a safety standard is provided to the consumer to prevent the patient from being avoided by the leakage current of the video device. It is becoming.

Meanwhile, in order to operate an external device such as the pillow speaker normally, the voltage isolated from the video device is continuously supplied. Even when the external device is not connected to the video device, such power is supplied. As a result, unnecessary waste of power consumption is caused.

That is, when the video device outputting the isolated power is used without being connected to an external device such as a pillow speaker, there is a problem in that power consumption is unnecessarily increased by continuously outputting the isolated power as a standby mode.

An embodiment of the present invention is proposed to solve the above problems, and discloses a power supply device that detects whether an external device is connected and thereby prevents power to be selectively generated from being supplied to the external device.

An electronic device according to an embodiment of the present invention is an input / output unit to which an external device is connected; A microcomputer that determines whether the external device is connected according to a voltage level sensed by the input / output unit; And a power supply unit to which an output of power for supplying the external device is switched according to the control of the microcomputer, wherein the microcomputer is configured to a magnitude of a voltage level of a predetermined output terminal among a plurality of output terminals configured in the input / output unit. Accordingly, it is determined whether the external device is connected.

In addition, the electronic device according to an embodiment of the present invention, in an electronic device that converts AC power input from the outside into DC power and uses it as an operating power source, a connection terminal of an external device is coupled and transmitted from the external device. An input / output unit having at least two output terminals for receiving a signal or providing power to be transmitted to the external device; A microcomputer for detecting whether a connection terminal of the external device is connected to an output terminal of the input / output unit only when AC power of the electronic device is turned on or DC power is turned on; And a power supply unit to which a power output for supplying the external device is switched under the control of the microcomputer.

In addition, the operating method of the electronic device according to an embodiment of the present invention is an electronic device having an input and output unit that can be connected to an external device, the output terminal constituting the input and output unit when the AC power or DC power of the electronic device is turned on Determining whether the external device is connected to the network; Supplying predetermined power to the external device when the external device is connected; And determining whether the connection of the external device is released according to the voltage level of the detected output terminal, and according to the determination result, power is continuously supplied to the external device or power supply to the external device is cut off. Step; is included.

According to the embodiment as proposed, even if it is an electronic device connectable to an external device, it is determined whether the external device is actually connected, and then a predetermined power is supplied, thereby eliminating unnecessary waste of power consumption. have.

Hereinafter, with reference to the accompanying drawings for the present embodiment will be described in detail. However, the scope of the idea of the present invention may be determined from the matters disclosed by the present embodiment, and the idea of the invention of the present embodiment may be performed by adding, deleting, or modifying components to the proposed embodiment. It will be said to include variations.

In the following description, the word 'comprising' does not exclude the presence of other elements or steps than those listed.

2 is a diagram schematically illustrating a configuration in which an external device is connected to an electronic device according to an embodiment of the present invention.

In the following description, the electronic device 100 refers to a device that converts AC power input from the outside into DC power and uses the same as an operating power of the electronic device. It is defined as the case where the AC power of the device is ON, and the case where the power of the electronic device is ON while the external AC power is being supplied is defined as the case where the DC power of the electronic device is ON. .

And even if only the AC power source is turned on in the electronic device, the microcomputer of the electronic device is awakened like a normal microcontroller.

Referring to FIG. 2, the electronic device 100 includes a pillow jack 150 as an input / output unit for interfacing with an external device 200, and the electronic device 100 includes the pillow jack 150 as an input / output unit. The external device 200 supplies power to the external device 200, and the external device 200 transmits a control command signal for remotely controlling the operation of the electronic device 100 through the pillow jack 150. 100 can be sent.

The electronic device 100 may be an image display device that displays an image on a screen or an audio device that outputs a voice signal. An audio amplifier 110 for amplification is shown. However, since the application of the present embodiment is not necessarily limited to the image display device or the audio device, this point needs to be noted.

The electronic device 100 transmits and receives a signal to and from the external device 200 through the pillow jack 150, and provides an electrical signal and power to supply a stable electric signal and power to the external device 200. A configuration for isolating the power source is provided.

For example, when the electronic device 100 and the external device 200 are used in a consumer environment in which a leakage current, such as a child or a patient, is severely affected, laws and regulations regarding the isolation of electric signals and power lines by the country or the autonomous region itself. In some cases, it is regulated.

In order to enable the external device 200 to receive an electric signal or power that is isolated from the electric device, a transformer or a photo coupler is provided at the external interface of the electronic device 100.

In detail, when the electronic device 100 is an image display device or an audio device, the audio signal output through the speaker of the external device 200 is amplified by the audio amplifier 110 and then the first transformer 111. The output voltage is transformed through In addition, the audio signal output to the second stage of the first transformer 111 is isolated from the primary side of the first transformer 111 due to the inherent characteristics of the transformer.

In addition, the electronic device 100 is provided with a power supply unit 130 to supply the power required for the operation of the external device 200, the voltage output by the power supply unit 130 is the second transformer 113 It is transformed by and then supplied to the external device 200 via the pillow jack 150.

Here, since the power output through the secondary side of the second transformer 113 is isolated from the primary side, the power supplied to the external device 200 may be stable.

In addition, a microcomputer 120 for detecting whether the external device 200 is connected to the pillow jack 150 is provided, the microcomputer 120 is the power supply unit according to whether the external device 200 is connected It plays a role for controlling the power supply by the (130).

That is, the microcomputer 120 determines whether the external device 200 is connected to the pillow jack 150 by detecting a voltage level of a specific terminal among a plurality of terminals constituting the pillow jack 150. Done.

For reference, when the connection of the external device by the pillow jack 150 is performed through the pin and the hole, the pillow jack 150 has a pin or a hole, and the connection terminal of the external device is conversely a hole or a pin. It is provided. In the following embodiment, it will be described on the assumption that the connection terminal of the external device is composed of a pin, the pillow jack of the electronic device is composed of a pinhole to which the pin can be connected.

In addition, in order to operate the external device, a predetermined power must be applied from the electronic device, and according to the present embodiment, pinholes formed in the pillow jack 150 are referred to as output terminals in connection with the transmission of power. Pins formed on the connection terminal of the external device may be referred to as an input terminal. Therefore, care should be taken not to be confused with the names of these configurations.

Meanwhile, when the AC power of the electronic device is turned on or the DC power is turned on, the microcomputer 120 sends a control signal to a specific pin of the pillow jack 120 to check whether the voltage of the pin is GND. Detailed description will be described later with reference to the accompanying drawings.

On the other hand, the microcomputer 120 is also connected to the photo coupler 112 provided on the signal line so that a stable signal transmission in the connection of the external device 200 can be performed. The photo coupler 112 is provided on a signal line connecting the pillow jack 150 and the microcomputer 120 to stably receive the control command signal of the electronic device transmitted from the external device 200. The photo coupler 112 is also used for isolation between the transmitted signals.

In addition, the electronic device 100 has a switch 140 for allowing a user to select whether to transmit an audio signal to the external device 200 or an audio signal through a main speaker in the electronic device 100. It may be further provided.

In this case, the audio signal is supplied to the main speaker via the relay terminal (see FIG. 3) provided on the output side of the audio amplifier 110.

In the above disclosure, a predetermined speaker is provided so that the external device 200 connected to the pillow jack 150 can output an audio signal, and a user manipulates the external device 200 to operate the electronic device. It is assumed that the environment can be controlled.

However, even when the electronic jack is provided with a pillow jack 150 to which the external connection device 200 can be connected, the electronic device may be used without connection of the external device. In this case, the power supply unit ( The technical configuration for preventing the power supply by 130 is continuously disclosed in detail below.

3 is a view showing in more detail the configuration of an electronic device including a power supply according to an embodiment of the present invention, Figures 4 to 6 are for explaining the configuration of the pillow jack according to an embodiment of the present invention Drawing.

FIG. 3 illustrates the details of the above-described FIG. 2 in more detail, and illustrates a configuration in which an isolated electrical signal and a power supply are supplied, and a configuration in which a signal is transmitted and received through a pillow jack.

4 to 6 illustrate a pillow jack according to an embodiment of the present invention, which will be described first, and six pinholes are provided to transmit and receive an electrical signal with an external device and to supply power to the external device. This pillow jack is formed.

For example, in FIG. 4 and FIG. 5, six pinholes are formed to move an electrical signal and power, and a signal for turning on / off power of an electronic device is provided through pinhole # 1. The third pinhole is used to transmit the electronic device's channel (UP) or serial data consisting of 5Bit, and the fourth pinhole is grounded (GND), and the fifth pinhole is used for the electronic device. The audio signal is output to the external device, and the signal for down channel of the electronic device is transmitted through pinhole 6.

The second pinhole is connected to the fourth pinhole, and when the terminal of an external device is connected to the second pinhole, the second pinhole is grounded together with the fourth pinhole.

An example of six pins is shown in the table below.

Pin 1  On / Off Pin 2  (connected to Pin 4) Pin 3  Channel Up or Data per this specification Pin 4  Gound Pin 5 Audio out Pin 6  Channel down

Although six pinholes in which six pins can be inserted into the pillow jack of the electronic device are illustrated as being configured, it will be possible for a person skilled in the art to adjust the number of pins according to the variation of the embodiment. However, in order for the microcomputer of the electronic device to know whether the external device is connected to the electronic device, the first pin holes ex and pin 4 are grounded, and the second pin holes ex and pin 2 are The first pinhole is connected to the conductor.

The detailed configuration thereof is shown in FIG. 6.

Referring to FIG. 6, a first pinhole 131 (first output terminal) electrically grounded from at least two pinholes constituting the pillow jack 150, and electrically connectable to the first pinhole 131. And a second pin hole 132 and a second output terminal, and a conductor 135 electrically connecting the first pin hole 131 and the second pin hole 132.

In particular, the second pinhole 132 is connected to the conductor 135 so as to be electrically connected to the first pinhole 131 only when a pin (shown in broken lines) is inserted into the hole. And a spaced portion 132b formed at a position spaced apart from the connection portion 132a by a predetermined distance.

The spacer 132b of the second pinhole 132 is connected to a power supply unit of the electronic device to receive a predetermined power 12V. When the pin is inserted into the second pinhole 132, the second pinhole 132 The connecting portion 132a and the spacer 132b of the pinhole 132 are electrically connected by the inserted pin.

In addition, since the connecting portion of the second pinhole 132 is connected to the first pinhole 131 which is grounded through the conductor 135, the voltage of the second pinhole 132 is also grounded.

As a result, as the second pinhole 132 is formed of a connecting portion 132a and a spacer 132b which are separated from each other, the second pinhole 132 is the first pinhole only when a pin is inserted into the inside. And 131 can be electrically connected.

Here, the reason why the predetermined voltage 12V is applied to the spacer 132b forming the lower end of the second pinhole 132 is that the voltage of the microcomputer of the electronic device is low at the second pinhole 132. Ground) or a high signal.

Referring to FIG. 3, the microcomputer of the electronic device determines whether the external device is connected while applying a predetermined control signal 12V to the second pinhole 132, and accordingly, supplies power to the external device through the pillow jack. Let's look at the configuration to supply.

Referring to FIG. 3, an electronic device including a power supply unit 130 for supplying power to an external device includes a pillow jack 150 for interfacing with the external device, and constitutes the pillow jack 150. Terminal pins of the external device are connected through the plurality of pinholes.

Among the plurality of pins constituting the pillow jack 150, pins (On / OFF, CH-UP, CH-DN, NC), which serve as passages for electrical signals to be transferred to the microcomputer 120, and the audio amplifier 110 It includes a pin that is a passage for transmitting the audio signal output from the external device.

In order for the external device connected through the pillow jack 150 to be isolated from the electrical signal and the power source inside the electronic device, a transformer or a photo coupler is formed on the electrical signal and the power line, as described above.

In detail, the microcomputer 120 is connected to a photo coupler formed in each electrical signal line for isolating an electrical signal with an external device, and the audio amplifier 110 is connected to the external device by a first transformer 111. It is isolated, and the power supply unit 130 is electrically isolated from the external connection device by the second transformer 113b.

The audio amplifier 110 outputs the audio signal amplified through the relay terminal 114 to the pillow jack 150 or to the main speaker 115 formed in the electronic device.

The power supply unit 130 includes a configuration of elements that can be switched under the control of the microcomputer 120, and is connected to the DC-DC converters 113a and 113b to transform the DC power. The DC-DC converter includes a DC-AC converter 113a for converting DC power to AC power, and a second transformer 113b for transforming power to be provided to an external device.

On the other hand, when the AC power source or DC power source of the electronic device is turned on, the microcomputer 120 sends a control signal to the second pinhole side of the pillow jack 150 to determine whether the voltage on the second pinhole side is high or low. Judge.

Here, the second pinhole may be a pinhole portion of reference numeral 132 shown in FIG. 6, and when the terminal pin of an external device is inserted into the second pinhole, the second pinhole is connected to the ground voltage of the first pinhole and thus the ground voltage (low). Signal).

In this case, the microcomputer 120 is an external device connected to the pillow jack 150, so that a predetermined power can be supplied to the external device side through the pillow jack 150 by the power supply unit 150. do.

However, when the microcomputer 120 determines the voltage level of the second pinhole of the pillow jack 150 and the external device is connected to the pillow jack, the second power source is turned off even if the DC power supply of the electronic device is turned off. The predetermined voltage 12V is supplied to the external device through the pillow jack 150 without detecting the voltage of the pinhole again.

According to the present exemplary embodiment, in order to detect the voltage level of the second pinhole, a predetermined voltage (12 V, a control signal) must be applied to the second pinhole at the time of detection, and the micom of the electronic device is the pillow jack every time. In order to detect the voltage level of the second pinhole, the control signal 12V must always be supplied.

Therefore, the microcomputer of the electronic device detects the voltage level of the second pinhole of the pillow jack once when the AC power source of the electronic device is turned on or the DC power source is turned on.

That is, the microcomputer 120 recognizes a control signal for supplying predetermined power to the pillow jack as AC power on or DC power on of the electronic device.

In other words, the voltage detection operation of the second pinhole by the microcomputer 120 is performed once each when the AC power source or the DC power source of the main body of the electronic device is turned on.

On the other hand, if the external connection device is removed from the pillow jack 150 when a predetermined power is continuously supplied to the external device under the control of the microcomputer 120, the microcomputer 120 is the second of the pillow jack. Since the voltage level of the pinhole can be detected, the microcomputer 120 controls the power supply unit 130 so that power to be supplied to the external device is not output.

According to an electronic device according to an embodiment of the present invention, the connection of the external device is performed before the AC power of the electronic device is turned on, and after the AC power of the electronic device is turned on (before the DC power is turned on). Since the operation is performed differently for each case, this will be described with reference to the accompanying flowchart.

7 is a flowchart illustrating a case where an external device is connected before AC power of an electronic device having a pillow jack is turned on.

First, when the initial AC power supply of the electronic device (S101), the microcomputer 120 sends a control signal 12V to the pinhole 2 of the pillow jack to determine whether the external device is connected (S102). At this time, when the voltage level of pinhole 2 of the pillow jack is high (12V), since the external device is not connected, the power unit is switched off so that power to be supplied to the external device is not output (S105).

When the 12V power is supplied to the external device connected to the pillow jack 150 as an external input mode, the 12V power is not supplied to the external device by turning off the power supply unit 130. You can also simply name it mode.

As a result of the determination, when the voltage level of the second pinhole of the pillow jack 150 is low (ground), the microcomputer 120 turns on the switch of the power supply unit 130 to the external device. 12V power is to be supplied (S103).

The microcomputer 120 stores the external device in a memory and continuously supplies 12 V of power so that the external device can be operated even when AC power or DC power of the electronic device is turned off.

If the external device is detached from the pillow jack 150 after the external device is connected to the pillow jack, the microcomputer 120 switches off the power supply unit 130 and no longer supplies power of 12V toward the external device. Do not supply this.

Since the 12V power is supplied to the external device due to the switch-on of the power supply unit 130 while the external device is connected, the voltage level of the second pinhole of the pillow jack 150 is 12V at ground. In case of changing to, it is determined that the external device is removed. In this case, before the DC power of the electronic device is turned on, the microcomputer 120 does not detect whether the external device is connected.

 8 is a flowchart illustrating a case where an external device is connected before AC power of the electronic device is turned on and DC power is turned on.

Although the AC power of the electronic device is turned on, when an external device is connected to the pillow jack 150 at the time before the DC power is turned on, different processing is performed according to the mode of the electronic device stored in advance.

That is, according to whether the mode stored before the AC power or DC power is turned off, whether the external input mode or the normal mode, the AC power of the electronic device is turned on (S201), and then the power unit is switched on to supply 12V power to the external device. This is to be supplied (S202), or to maintain the off state of the power supply switch.

If the operation mode of the electronic device stored before the AC or DC power of the electronic device is turned off is the external input mode, the microcomputer 120 turns on the power supply unit, and then the DC power is turned on by the user. In step S203, whether the external device is connected to the pillow jack 150 is detected again (S204).

As a result of the detection of the microcomputer 120, if the external device is still connected, the switch-on state of the power supply unit is continuously maintained (S205), and whether the external device is removed from the pillow jack is monitored. That is, the voltage level of the second pinhole of the pillow jack 150 is detected.

As a result, when the external connection device is removed, the microcomputer 120 turns off the switch of the power supply unit 130 (S207) so that the 12V power is no longer supplied to the external device. In operation S208, the current mode is stored in the memory.

On the other hand, after the AC power source of the electronic device is turned on, if the operation mode of the electronic device previously stored is the normal mode, the DC power on 209 of the user is awaited while maintaining the OFF state of the power supply unit 130.

The microcomputer 120 determines whether the external device is connected by sending a control signal to the second pinhole side of the pillow jack 150 as the DC power is turned on (S210).

As a result of the determination, when an external device is connected to the pillow jack 150, the microcomputer 120 turns on the switch of the power supply unit 130 (S205) so that power of 12V is supplied to the external device so that the external device is supplied to the external device. Allow the device to operate normally. If it is determined that the external device is connected, the operation mode of the electronic device is stored as an external connection mode. Thereafter, the monitoring whether the external device is detached and the operation method thereof are the same as in the foregoing description.

On the other hand, if the external device is not connected as a result of detecting the pillow jack 150 after the DC power input of the electronic device, the current operation mode is stored in the normal mode (S208).

According to the embodiment of the present invention as described above, even if the electronic device can be connected to the external device, it is determined whether the external device is actually connected, and then a predetermined power is supplied to eliminate unnecessary waste of power consumption. There is an advantage.

1 is a view for explaining a concept of disconnecting power between an image device and an external device connectable thereto.

2 is a view schematically showing a configuration in which an external device is connected to an electronic device according to an embodiment of the present invention.

3 is a view showing in more detail the configuration of an electronic device including a power supply according to an embodiment of the present invention.

4 to 6 are views for explaining the configuration of the pillow jack according to an embodiment of the present invention.

7 is a flowchart illustrating a case where an external device is connected before AC power of an electronic device having an input / output unit is turned on.

8 is a flowchart illustrating a case where an external device is connected before AC power of the electronic device is turned on and DC power is turned on.

Claims (11)

An input / output unit to which an external device is connected; A microcomputer that determines whether the external device is connected according to a voltage level sensed by the input / output unit; And And a power supply unit to which an output of power for supplying the external device is switched according to the control of the microcomputer. The microcomputer determines whether the external device is connected according to a magnitude of a voltage level of a predetermined output terminal among the plurality of output terminals configured in the input / output unit. The method of claim 1, The input / output unit includes a grounded first output terminal and a second output terminal electrically connected to the first output terminal when the external device is connected. And the microcomputer switches the power supply unit when the voltage of the second output terminal is grounded to control power supply to an external device by the power supply unit. The method of claim 2, The microcomputer detects the voltage level of the second output terminal when AC power of the electronic device is turned on or DC power is turned on. The method of claim 2, The second output terminal is composed of a connecting portion electrically connected to the first output terminal, a separation portion separated in a position spaced apart from the connecting portion a predetermined distance, And the connecting portion and the separating portion of the second output terminal are electrically connected when the external device is connected. Since the item 1 is mechanically described, the other device independent terms should be described in circuit form.ex) Performing the detection according to the AC power on or DC power on of the electronic device. AC on. DC on needs to be defined in claims. In an electronic device that converts AC power input from the outside into DC power and uses it as an operating power source, An input / output unit coupled to a connection terminal of an external device and provided with at least two output terminals for receiving a signal transmitted from the external device or providing power to be transmitted to the external device; A microcomputer for detecting whether a connection terminal of the external device is connected to an output terminal of the input / output unit only when AC power of the electronic device is turned on or DC power is turned on; And And a power supply unit to which a power output for supplying the external device is switched under the control of the microcomputer. The method of claim 5, The microcomputer stores whether the external device is connected, and when the external device is connected, controls the power supply to the external device by the power supply unit even if the DC power of the electronic device is turned off. Electronic equipment. The method of claim 5, The microcomputer detects whether the voltage level of the output terminal is increased or decreased, and determines whether the external device is connected or detached from the external device. In an electronic device having an input and output unit that can connect an external device, Determining whether the external device is connected to an output terminal constituting the input / output unit when AC power or DC power of the electronic device is turned on; Supplying a predetermined power to the external device when the external device is connected; And Determining whether the external device is disconnected according to the voltage level of the detected output terminal, and according to the determination result, the power is continuously supplied to the external device or the power supply to the external device is cut off. Operation method of the electronic device is included. The method of claim 8, The determining of whether the external device is connected may be performed according to whether a voltage level of a predetermined terminal among the output terminals constituting the input / output unit is ground. The method of claim 8, Before determining whether the external device is connected, When the AC power of the electronic device is turned on, reading the operation mode of the electronic device previously stored, and supplying a predetermined power to the external device according to the contents of the operation mode of the electronic device to be read out; Method of operation of the electronic device, characterized in that. The method of claim 8, The method of determining whether the external device is connected is performed whenever the AC power and the DC power of the electronic device are both turned on.

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