TWI475478B - Mobile electronic device and method for controlling volume thereof - Google Patents

Description

Mobile electronic device and volume control method thereof

The present invention relates to an audio processing technology, and more particularly to a mobile electronic device and a volume control method thereof.

Todayadays, consumer mobile electronic devices almost all have audio playback functions, such as MP3 players, notebook computers, smart phones, and the like. Users can connect their mobile electronic devices to a portable headset (such as a stereo headset, a headset microphone) or a loudspeaker, so they can listen to music anytime, anywhere. However, users often unconsciously listen to music that exceeds the volume of the human ear through the earphones for a long time without knowing it. Since the earphone is closer to the eardrum, the user's own hearing may cause irreparable damage. Some users even increase the volume of the music to offset the outside noise, which increases the chance of hearing damage.

In this way, many countries limit the maximum output volume of mobile electronic devices when they are audible through headphones, so as to avoid possible hearing injuries, such as the European video equipment safety standard EN 503332 adopted by EU countries. The manufacturer thus downgrades the maximum output volume of the mobile electronic device as a whole, in order to comply with the above specifications. However, if the user wishes to use an external loudspeaker to obtain a louder volume from the mobile electronic device, the mobile electronic device will not be able to meet the user's request due to the above volume limitation, and the consumer will be ill. This shortcoming creates a poor user experience.

The invention provides a volume control method for a mobile electronic device, which can avoid a sudden excessive volume and damage the human ear when the speaker device is inserted into the mobile electronic device, and determine whether the inserted speaker device is a microphone type earphone to limit The maximum volume output of the mobile electronic device complies with the earphone limitation specification and can satisfy the user's large volume output for the external loudspeaker.

The invention provides a mobile electronic device comprising an earphone jack, a processing unit and a plug detecting circuit. The processing unit is configured to detect whether the earphone jack of the mobile electronic device is inserted into the conductive plug of the speaker device. When detecting that the conductive plug has been inserted into the earphone jack, the processing unit adjusts the output volume value of the mobile electronic device to a protection volume value. A plug detecting circuit is coupled to the earphone jack and the processing unit. The plug detecting circuit is configured to determine whether the conductive plug is a microphone type plug or a non-microphone type plug to provide a detection signal to the processing unit. Wherein, when the conductive plug is a microphone type plug, the processing unit adjusts a maximum output volume gain of the mobile electronic device to a standard volume gain; when the conductive plug is a non-microphone type plug, the processing unit performs the action The maximum output volume gain of the electronic device is adjusted to a non-canonical volume gain, wherein the non-canonical volume gain is greater than the canonical volume gain.

In an embodiment of the present invention, the non-microphone type plug includes a connection area, a left channel connection area, and a right channel connection area, and the connection area in the non-microphone type plug is in the microphone type plug. A collection of areas and microphone connection areas.

In another aspect, the present invention provides a volume control method for a mobile electronic device, including the steps of: detecting an ear of the mobile electronic device Whether the machine socket is inserted into the conductive plug of the speaker device. When the conductive plug has been inserted into the earphone jack, the output volume value of the mobile electronic device is adjusted to protect the volume value. It is judged whether the conductive plug is a microphone type plug or a non-microphone type plug. When the conductive plug is a microphone type plug, the maximum output volume gain of the mobile electronic device is adjusted to a standard volume gain. And, when the conductive plug is a non-microphone type plug, adjusting a maximum output volume gain of the mobile electronic device to a non-canonical volume gain, wherein the non-canonical volume gain is greater than the canonical volume gain.

Based on the above, the mobile electronic device of the embodiment of the present invention can detect whether the conductive plug of the speaker device is inserted, and determine the type of the conductive plug. When the user inserts the speaker device into the mobile electronic device, the mobile electronic device automatically adjusts its output volume value to the protection volume value, thereby preventing the sudden excessive volume from harming the human ear. The plug sensing circuit detects whether the conductive plug has four signal conducting regions (microphone type plugs) or three signal conducting regions (non-microphone type plugs), thereby judging the type of the speaker device and adjusting the maximum using the judgment result. The voltage amplitude of the volume, thereby limiting the maximum volume value of the earphone with the microphone and complying with the earphone limit specification; and increasing the maximum volume of the external loudspeaker, thereby satisfying the user's large volume output of the external loudspeaker.

The above described features and advantages of the present invention will be more apparent from the following description.

DETAILED DESCRIPTION OF THE INVENTION Reference will now be made in detail to the exemplary embodiments embodiments In addition, wherever possible, in the schema and Elements/components/symbols that use the same reference numerals in the embodiments represent the same or similar parts.

1 is a functional block diagram illustrating a mobile electronic device 100 in accordance with an embodiment of the present invention. As shown in FIG. 1, the mobile electronic device 100 can be a notebook computer, a tablet computer, a smart phone, an MP3 player, and the like. The mobile electronic device 100 includes a headphone jack 130, a processing unit 110, and a plug detecting circuit 120 connected to the headphone jack 130. In this embodiment, the mobile electronic device 100 further includes an audio processor 140 for processing transmission and reception of audio signals. The audio processor 140 can be an audio digital signal processor (Audio DSP), an audio codec (Codec), or a collection of both.

Processing unit 110 may be a central processing unit and/or platform signal hub in a notebook or tablet, or may be an embedded chip specifically for controlling audio processor 140. The processing unit 110 can determine whether the conductive plug of the external speaker device is inserted into the earphone jack through the earphone detecting pin connected to the earphone jack 130 by determining whether the headshot detect signal HDS is generated or not. 130.

When the processing unit 110 detects that the conductive plug has been inserted into the earphone jack 130, the processing unit 110 directly adjusts the output volume value of the mobile electronic device 100 to the protection volume value. In detail, it is assumed that the mobile electronic device 100 can be divided into a plurality of volume ranges in its volume range, for example, setting the mute to the 0th volume interval, and outputting the volume corresponding to the maximum output volume gain set by the mobile electronic device 100. Set to the 12th volume range, and divide the 12 volume intervals in equal proportions.

In general, when the conductive plug of the speaker device is inserted into the earphone jack, the mobile electronic device emits a corresponding volume sound through the speaker device according to the output volume value at that time. However, when the user usually does not use the earphone, since the volume of the music needs to be increased to offset the external noise, the output volume value at that time will be higher, for example, the maximum 12th volume interval. If the user inserts the mobile electronic device into the earphone to convert the sound amplification mode, the user is likely to cause damage to the human ear due to the sudden excessive volume.

Therefore, the processing unit 110 of the embodiment of the present invention automatically adjusts the output volume value to protect the human ear's protection volume value when the conductive plug has been inserted into the earphone jack 130 to avoid the above situation. The protection volume value may be a sixth volume section located in the middle among the 12 volume sections differentiated by the volume range, thereby being used as a preset volume section. The preset volume interval may also be a volume interval set by the user in the preset data of the mobile electronic device 100. Thereby, although the user may find that the sound volume is lowered to protect the human ear when the conductive plug has been inserted into the earphone jack 130, the user can adjust the volume to the desired volume again at this time.

Referring to FIG. 1 , the plug detecting circuit 120 coupled to the earphone jack 130 and the processing unit 110 determines the conductive plug while the processing unit 110 has inserted the conductive plug to adjust the output volume value to protect the volume value. Whether it is a microphone type plug or a non-microphone type plug to provide a detection signal DS to the processing unit 110, and the plug detecting circuit 120 is explained in detail in the following disclosure.

Due to the European video equipment security standard EN 503332, the test conditions for various consumer electronic devices using headphones are: when the consumer electronic device uses a microphone with a microphone as a speaker device, and the playback has -6dB pink noise. In the case of a music pattern, the output voltage of the audio signal of the consumer electronic device must be less than a set value, for example, the rms value of the output voltage is less than 150 millivolts (mVrms). There are also differences in the conductive plugs used for headphones with microphones and external loudspeakers.

2 is a schematic diagram of the speaker devices 210, 220 and the mobile electronic device 100 equipped with a microphone type plug, and FIG. 3 is a schematic diagram of the speaker devices 230, 240 and the mobile electronic device 100 equipped with a non-microphone type plug. As shown in FIG. 2, the speaker devices 210 and 220 having the microphone type plug in this embodiment are all exemplified by an earphone having a microphone. The conductive plugs 212, 214 provided with the microphone-equipped earphones should have four non-conducting signal conducting areas for respectively transmitting the left and right channel audio signals, the microphone signals, and the ground. The four signal conducting areas are a microphone connection area MIC, a connection area GND, a left channel connection area L, and a right channel connection area R, respectively. Since the arrangement of these signal conducting regions is slightly different for different manufacturers, the arrangement of the two conductive plugs 212, 222 that are widely used is disclosed in FIG.

The conductive plug 212 provided by the speaker device 210 is an arrangement of the signal transmission area mainly used by the company, which is to set the connection area GND to the microphone connection area MIC and the left channel connection area L and the right channel. Between the connection areas R, the signal transmission area of the conductive plug 212 is arranged from left to right by the microphone connection area MIC, the connection area GND, and the right channel connection. The connection area R and the left channel connection area L. The left channel connection area L and the right channel connection area R may also be replaced with each other.

The conductive plug 222 provided by the speaker device 220 is an arrangement of signal conducting areas mainly used by other companies, and the microphone connecting area MIC is set in the connection area GND and the left channel connection area L and the right channel connection area R. Therefore, the left-to-right arrangement of the signal conducting regions of the conductive plug 222 is the grounding area GND, the microphone connection area MIC, the right channel connection area R, and the left channel connection area L. Each of the signal conducting regions of the conductive plugs 212, 222 is isolated from each other by an insulating ring 250, so that the microphone-type plugs 212, 222 provided by the speaker devices 210, 220 are also due to the four ring-shaped signal conducting regions. It is called a four-ring plug.

Referring to FIG. 3, in the present embodiment, the speaker devices 230 and 240 having the non-microphone type plugs 232 and 242 are an external sound horn and a stereo earphone as an example. The external loudspeakers and stereo headphones have no microphones, so the signal transmission area of the non-microphone connectors 232, 242 does not require the microphone connection area MIC, but is connected to the connection area GND. That is to say, the left-to-right arrangement of the signal conducting areas of the non-microphone type plugs 232, 242 is the ground area GND, the right channel connection area R, and the left channel connection area L, instead of the microphone type plugs 232, 242. The connection area GND in the middle is a collection of the connection area GND and the microphone connection area MIC in the microphone type plugs 212, 222. The non-microphone type plugs 232, 242 provided by the speaker devices 230, 240 are referred to as three-ring plugs due to the three ring-shaped signal conducting regions.

Therefore, since the conductive plug of the external loudspeaker is a non-microphone type plug (three-ring plug), the European video equipment safety standard EN 503332 The conductive plug of the microphone with the microphone is tested to be a microphone type plug (four-ring plug). Therefore, the processing unit 110 of the embodiment of the present invention conveniently uses the plug detecting circuit 120 to accurately determine the conductive plug currently inserted into the mobile electronic device 100. Whether the microphone type plug (four-ring plug) or the non-microphone type plug (three-ring plug) can distinguish the type of the speaker device, thereby adjusting the maximum output volume gain of the mobile electronic device to the standard volume gain according to the safety standard specification. Or a non-canonical volume gain greater than the standard volume gain.

FIG. 4 is a schematic diagram illustrating the insertion of the mobile electronic device 100 into the speaker device 410 according to an embodiment of the invention. FIG. 5 is a flow chart illustrating the volume control method of the mobile electronic device 100 according to an embodiment of the invention. The components in Fig. 4 are the same as in Fig. 1. Referring to FIG. 4 and FIG. 5 simultaneously, in step S510, the processing unit 110 detects whether the earphone jack 130 of the mobile electronic device 100 is inserted into the conductive plug 412 of the speaker device 410. When the step S510 is NO, the processing unit 110 returns to the step S510 to continue the detection.

When the conductive plug 412 has been inserted into the earphone jack 130 (YES in step S510), the process proceeds to step S520, and the processing unit 110 adjusts the output volume value of the mobile electronic device 110 to the protection volume value, thereby protecting the human ear from being burstped. Injury.

In step S530, the plug detecting circuit 120 determines whether the conductive plug 412 is a microphone type plug (four-ring plug) or a non-microphone type plug (three-ring plug), and notifies the processing unit 110 by using the detection signal DS. In FIG. 4, the earphone jacks 130 have connectors 420, 430, 440, and 450, respectively. The four signal conducting regions are electrically connected to the conductive plugs 412, respectively, so that the plug detecting circuit 120 can determine the type of the conductive plugs 412.

When the inserted conductive plug 412 is a microphone type plug (four-ring plug), when the inserted speaker device 410 is a microphone with a microphone, the process proceeds from step S530 to step S540, and the processing unit 110 complies with relevant safety standards. And the specification, the maximum output volume gain of the mobile electronic device 100 is adjusted to meet the specification of the standard volume gain. In this embodiment, the above-mentioned standard volume gain may be an output voltage amplitude having a rms of 300 volts (mV rms) when the output waveform is a sine wave with zero decibel (0 dB) noise.

In contrast, when the inserted conductive plug 412 is a non-microphone type plug (three-ring plug), indicating that the inserted speaker device 410 may be an external sound horn, the process proceeds from step S530 to step S550, in order to improve the external connection. The driving force of the loudspeaker is output to a larger volume, and the processing unit 110 can adjust the maximum output volume gain of the mobile electronic device 100 to a non-canonical volume gain that is greater than the standard volume gain. In this embodiment, the above-mentioned standard volume gain may be an output voltage amplitude having a square root of 800 volts (mV rms) when the output waveform is a sine wave having zero decibel (0 dB) noise. The embodiment of the present invention also allows the user to adjust the size of the preset non-canonical volume gain through the processing unit 110. The present invention is not limited thereto.

In summary, the mobile electronic device according to the embodiment of the present invention can detect whether the conductive plug of the speaker device is inserted, and determine the type of the conductive plug. When the user inserts the speaker device into the mobile electronic device, the mobile electronic device automatically adjusts its output volume value to the protection volume value. So as to avoid sudden excessive volume to hurt the human ear. The plug sensing circuit detects whether the conductive plug has four signal conducting regions (microphone type plugs) or three signal conducting regions (non-microphone type plugs), thereby judging the type of the speaker device and adjusting the maximum using the judgment result. The voltage amplitude of the volume, thereby limiting the maximum volume value of the earphone with the microphone and complying with the earphone limit specification; and increasing the maximum volume of the external loudspeaker, thereby satisfying the user's large volume output of the external loudspeaker.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

100‧‧‧Mobile electronic devices

110‧‧‧Processing unit

120‧‧‧plug detection circuit

130‧‧‧ headphone jack

140‧‧‧Optical processor

210, 220, 230, 240, 410‧‧‧ speaker devices

212, 222, 232, 242‧‧‧ Conductive plug

250‧‧‧Insulation ring

420, 430, 440, 450‧‧‧ connectors

DS‧‧‧Detection signal

HDS‧‧‧ headphone detection signal

MIC‧‧‧ microphone connection area

GND‧‧‧Connected area

L‧‧‧Left channel connection area

R‧‧‧Right channel connection area

1 is a functional block diagram illustrating a mobile electronic device in accordance with an embodiment of the present invention.

2 is a schematic view of a speaker device and a mobile electronic device equipped with a microphone type plug.

3 is a schematic view of a speaker device and a mobile electronic device equipped with a non-microphone type plug.

4 is a schematic diagram showing the insertion of a mobile electronic device into a speaker device according to an embodiment of the invention.

FIG. 5 is a flow chart illustrating a volume control method of a mobile electronic device according to an embodiment of the invention.

S510~S550‧‧‧Steps

Claims (10)

A mobile electronic device includes: a headphone jack; a processing unit configured to detect whether the earphone jack of the mobile electronic device is inserted into a conductive plug of a speaker device, and when detecting that the conductive plug is inserted When the earphone is connected to the hole, the processing unit adjusts the output volume value of the mobile electronic device to a protection volume value; and a plug detecting circuit coupled to the earphone jack and the processing unit for determining that the conductive plug is a microphone The type plug is also a non-microphone type plug to provide a detection signal to the processing unit, wherein when the conductive plug is a microphone type plug, the processing unit adjusts the maximum output volume gain of the mobile electronic device to a standard volume gain; When the conductive plug is a non-microphone type plug, the processing unit adjusts the maximum output volume gain of the mobile electronic device to a non-canonical volume gain, wherein the non-canonical volume gain is greater than the canonical volume gain. The mobile electronic device of claim 1, wherein the microphone type plug comprises a microphone connection area, a connection area, a left channel connection area, and a right channel connection area. The mobile electronic device of claim 2, wherein the connection area is located between the microphone connection area and the left channel connection area and the right channel connection area. The mobile electronic device of claim 2, wherein the microphone connection area is located between the connection area and the left channel connection area and the right channel connection area. The mobile electronic device of claim 2, wherein the non-microphone type plug comprises a connection area, a left channel connection area, and a right channel connection area, and the connection area in the non-microphone type plug is The collection area of the microphone type plug and the collection of the microphone connection area. The mobile electronic device of claim 1, wherein the protection volume value is in an intermediate volume interval of a plurality of volume intervals differentiated by a volume range. The mobile electronic device of claim 1, wherein the standard volume gain is an output voltage amplitude having a root mean square of 300 volts when the output waveform is a sine wave with zero decibel noise, and the non-canonical volume gain When the output waveform is a sine wave with zero-decibel noise, the output voltage amplitude with a square root of 800 volts is obtained. A volume control method for a mobile electronic device, the mobile electronic device having a headphone jack, the method comprising: detecting whether the earphone jack of the mobile electronic device is inserted into a conductive plug of a speaker device; when the conductive plug is inserted When the earphone is connected to the hole, the output volume value of the mobile electronic device is adjusted to a protection volume value; whether the conductive plug is a microphone type plug or a non-microphone type plug; when the conductive plug is a microphone type plug, the mobile electronic device is used The maximum output volume gain is adjusted to the gauge volume gain; When the conductive plug is a non-microphone type plug, the maximum output volume gain of the mobile electronic device is adjusted to a non-canonical volume gain, wherein the non-canonical volume gain is greater than the canonical volume gain. The method of claim 8, wherein the protection volume value is in an intermediate volume interval of the plurality of volume intervals differentiated by the volume range. The method of claim 8, wherein the microphone type plug comprises a microphone connection area, a connection area, a left channel connection area, and a right channel connection area, and the non-microphone type plug includes a connection area a left channel connection area and a right channel connection area, and the connection area in the non-microphone type plug is a collection of the connection area and the microphone connection area in the microphone type plug.