JPH0793961A - Acoustic apparatus - Google Patents

Abstract

PURPOSE:To control the rise or the fall of a power supply according to a change in a quantity of external light such as the turning-on-and-off of illumination by installing a quantity-of-light detection mechanism in, e.g. a radio-integrated tape recorder or the like. CONSTITUTION:When a commercial power supply is connected via a power- supply cord 2 and a connector 3, the commercial power supply is supplied to a system control circuit 9 by a switch SW instead of a battery 7. In addition, the power supply is supplied also to a charging capacitor 19. When its terminal voltage rises, a transistor 21 is turned on, and the power supply is supplied to a circuit including a photodetector 28. When the commercial power supply is connected and an optical control mode is set, the terminal voltage of the element 28 is detected at a cycle of about one second in the circuit 9, and a change in four continuous quantities of light is judged. When the inside of a room becomes bright in this state, the power supply is supplied also to a CD player 11 or the like in which the logic level of a control port P for the circuit 9 has been changed over. The same is performed even when the illumination at the inside of the room is turned off so as to be changed over to a sleep mode.

Description

Detailed Description of the Invention

[0001]

[Table of Contents] The present invention will be described in the following order. Field of Industrial Application Conventional Technology Problems to be Solved by the Invention Means for Solving the Problems (FIGS. 1 and 2) Action (FIGS. 1 and 2) Example (1) Configuration of Example (FIGS. 1 to 1) (FIG. 3) (2) Effect of the embodiment (3) Other embodiment Effect of the invention

[0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an audio device, and can be applied to, for example, a radio-integrated tape recorder in which a compact disc player is integrally housed.

[0003]

2. Description of the Related Art Conventionally, in this type of audio equipment, various functions have been added to improve usability.

That is, in this type of audio equipment, the power is turned on at a predetermined time set by a timer in advance, so that the timer can be set at a desired time and used, for example, as an awakening. Has been done. In addition, in this type of audio equipment, the power is turned off after setting a so-called sleep mode for a predetermined time so that the power can be turned off automatically even when going to bed while listening to music. Has been done.

[0005]

By the way, when operating this kind of audio equipment by returning home at night, in this kind of audio equipment, it is necessary to operate the power switch one by one. Also, when you go to sleep with the sleep mode set,
It is necessary to operate the operators in this sleep mode one by one.

If this kind of operation can be simplified, it is considered that the usability of this kind of audio equipment can be further improved.

The present invention has been made in consideration of the above points, and an object thereof is to propose an audio device capable of further simplifying the operation of a power source or the like as compared with the prior art.

[0008]

In order to solve such a problem, in the present invention, a light amount detecting mechanism 27, 28 for outputting a light amount detecting signal (A / D) whose signal level changes according to the light amount of the external light L. , 29, and a control circuit 9 for turning on the power when the amount of extraneous light changes by a predetermined value or more and increases based on the signal level of the light amount detection signal (A / D).

Furthermore, in the second invention, a light amount detection signal (A / A / V) whose signal level changes in accordance with the light amount of the external light L
D) outputting light amount detection mechanisms 27, 28, 29, and based on the signal level of the light amount detection signal (A / D), when the external light amount changes by a predetermined value or more and decreases, the power is turned on after a predetermined period. And a control circuit 9 for lowering it.

Further, in the third invention, the audio equipment 1
Is configured so that the power can be turned on by selectively using a predetermined battery 7 and a commercial power source. The control circuit 9 selectively uses the commercial power source to detect the light amount detection signal (A / D).
The power is turned on based on the signal level of 1 or the power is turned on after a predetermined period of time based on the signal level of the light amount detection signal (A / D).

[0011]

When the external light quantity changes by a predetermined value or more and increases based on the signal level of the light quantity detection signal (A / D), the power is turned on so that the user who comes home at night turns on the illumination. Then, you can easily turn on the power.

When the amount of extraneous light changes by a predetermined value or more and decreases, the power is turned off after a predetermined period of time. When the user goes to sleep, the light is turned off and the power is turned off after a predetermined period of time. be able to.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

(1) Structure of the Embodiment In FIG. 1, reference numeral 1 denotes a radio-integrated tape recorder in which a compact disc player is integrally housed as a whole, so that it can be driven by selectively using a commercial power source or battery. Has been done.

That is, in the radio-integrated tape recorder 1, by connecting the power cord 2 to the connector 3 and then connecting the power cord 2 to a commercial power source, the commercial power source is connected to the power transformer 4 via the power cord 2. The secondary side output of the power transformer 4 is rectified by the diode bridge 5.

The switch SW outputs the output voltage of the diode bridge 5 to the smoothing capacitor 6 when the power cord 2 is connected to the connector 3, while the power cord 2 is removed from the connector 3 when the power cord 2 is removed from the connector 3. The power source of the battery 7 built in 1 is output to the smoothing capacitor 6. As a result, the radio-integrated tape recorder 1
With a simple operation of simply connecting the power cord 2 as needed, the battery 7 can be replaced by a commercial power source.

The smoothing capacitor 6 outputs a power source input via the switch SW to a regulator (REG) 8, and the regulator 8 stabilizes this power source and outputs it to the system control circuit 9, thereby the system control circuit. 9 can be driven. As a result, the radio-integrated tape recorder 1 constantly supplies power to the system control circuit 9 and can be set to an operating state as necessary.

Further, the smoothing capacitor 6 is a switch SW.
The power supplied via the transistor 10 is output to the compact disk player (CD player) 11, the tape deck 12, and the radio 13 via the transistor 10. The transistor 10 connects the base emitters with the resistor 14. Further, the transistor 10 has a base resistor 16 connected to the collector of a transistor 15 forming an emitter ground circuit, and the transistor 15 has its base connected to a control port P of the system control circuit 9 via a base resistor 17.

As a result, the transistors 10 and 15 are
A switch circuit for switching the operation according to the logic level of the control port P is formed so that the power source of the smoothing capacitor 6 can be supplied to the compact disk player 11, the tape deck 12, and the radio 13 as needed.

The diode bridge 5 supplies power to the charging capacitor 19 via the charging resistor 18, and when a commercial power supply is connected thereto, the terminal voltage of the charging capacitor 19 is raised. The charging capacitor 19 is configured such that the discharging resistor 20 is connected in parallel, and when the supply of commercial power is stopped, the terminal voltage is lowered.

The transistor 21 is formed of an emitter grounding circuit, has an input resistor 22 and a grounding resistor 23 connected to the base, and receives the terminal voltage of the charging capacitor 19 via the input resistor 22. In contrast to this transistor 21, the transistor 24 is
Connect the collector resistor 25 of the
An emitter is connected to the power supply V _DD output from the. Further, in the transistor 24, a resistor 26 is connected between the base emitters, and the collector output is a resistor 27, which is a light receiving element 2 composed of Cds.
The series circuit of the resistor 8 and the resistor 29 is grounded.

As a result, the transistor 21 is turned on when the terminal voltage of the charging capacitor 19 rises, and supplies the power supply V _DD to the series circuit of the resistor 27, the light receiving element 28, and the resistor 29, while the transistor 21 is charged. When the terminal voltage of goes down, it switches to the off state and the resistance 2
The supply of the power supply V _DD to the series circuit of 7, the light receiving element 28 and the resistor 29 is stopped. Thus, in the radio-integrated tape recorder 1, when the terminal voltage of the light receiving element 28 falls to 0 [V], it can be determined that the user has selected the battery 7 as the driving power supply, and the light receiving element 28 When the terminal voltage rises from 0 [V], it can be determined that the user has selected the commercial power source as the driving power source.

On the other hand, the light receiving element 28 has a characteristic that its resistance value decreases in accordance with the amount of incident light, so that the light receiving element 28 can efficiently receive the external light L of indoor illumination such as a fluorescent lamp and the like. It is arranged to be arranged on the upper end surface of the tape recorder 1. As a result, the terminal voltage of the light-receiving element 28 rises when the brightness of the room in which the radio-integrated tape recorder 1 is placed becomes brighter. The brightness is also detected.

As a result, the radio integrated tape recorder 1
In the above, the input port A / D of the system control circuit 9 can detect the terminal voltage of the light receiving element 28 to discriminate both the room brightness and the type of the power source, and the entire configuration is simplified accordingly. It is designed to get you.

The system control circuit 9 is formed by a microcomputer that operates with a stabilized power source generated by the reguulator 8 and controls the entire operation in response to the operation of a predetermined operator. At this time, the system control circuit 9 converts the terminal voltage of the light receiving element 28 input through the input port A / D into a digital value by the built-in analog digital conversion circuit and processes it. The entire operation is switched based on.

That is, the system control circuit 9 switches the operation to the standby mode in the state where the power switch is not operated, and when the power switch is operated in the standby mode, the system control circuit 9 rises to the operating state and then the control port. The logic level of P is switched, and the supply of power to the compact disk player 11 and the like is thereby started. As a result, the system control circuit 9 outputs a control code to the compact disk player 11 or the like in response to the subsequent operation of the operator, so that the user can listen to music desired by the user.

In the standby mode, the system control circuit 9 determines the type of power source selected by the user based on the terminal voltage of the light receiving element 28, and when the user selects the battery 7 as the driving power source, Switches to a low power consumption operating mode. As a result, the radio-integrated tape recorder 1 can reduce the consumption of the battery 7.

Further, when the user sets the timer to the standby mode, the system control circuit 9 starts the operating state at the time set by the user even if the power switch is not operated, and then the control port. By switching the logic level of P, the whole operation is controlled so that the user can listen to music desired by the user at the set time. On the other hand, when the user sets the timer to select the sleep mode, the system control circuit 9 switches the logic level of the control port P to the standby mode when the time set by the user is reached. The user can listen to music desired by the user even when sleeping.

On the other hand, when the manipulator in the light control mode is pressed, the system control circuit 9 sets the operation mode to the light control mode. In this light control mode,
The system control circuit 9 detects the terminal voltage of the light receiving element 28 in a cycle of about 1 second, and executes the processing procedure shown in FIG. 2 based on the detection result to control the entire operation.

That is, the system control circuit 9 shifts from step SP1 to step SP2, initializes the first and second registers R1 and R2, and then continues to step SP3.
Then, the light quantity detection result A _N is input to the first register R1.
At this time, as shown in FIG. 3, the system control circuit 9 detects the light level obtained by detecting the signal level of the input port A / D in a cycle of 1 second, a ₁ , a ₂ , a ₃ , a ₄ ,. ,
Of the a _n , a _{n + 1} , ..., four consecutive light intensity detection results a ₁ , a ₂ , a ₃ , a ₄ are taken in to detect the maximum value a _max and the minimum value a _min , and the maximum value is detected. It is determined whether the difference between a _max and the minimum value a _min is less than or equal to a predetermined value.

That is, when detecting the brightness of the room with this type of light receiving element 28, for example, it may be possible to erroneously detect the light such as lightning, and in the case of lighting equipment such as a fluorescent lamp, at the start of lighting, It may blink. It is also conceivable that the user may cross in front of the detection element, and even in this case, if the user has completely crossed for 3 seconds, the external light L is incident on the light receiving element 28 with the original light amount.

Accordingly, the system control circuit 9 averages the _four light amount detection results a ₁ , a ₂ , a ₃ , a ₄ when the difference between the maximum value a _max and the minimum value a _min is less than or equal to a predetermined value. The light quantity detection result A _N is obtained by digitization, and the averaged light quantity detection result A _N is stored in the first register R1.

On the other hand, when the difference between the maximum value a _max and the minimum value a _min is larger than the predetermined value, in this case, the system control circuit 9 causes the last captured light amount detection result a ₄ and the following three light amount detections. Regarding the result, similarly, the maximum value and the minimum value are detected and averaged.

Thus, the system control circuit 9 further sets the light quantity detection period to about 1 second by averaging the light quantity detection results and processing when the variations in the light quantity detection results a ₁ , a ₂ ... Are small. As a result, the entire operation is controlled on the basis of a state in which the change in the amount of light in the room is stable, so that the entire operation can be reliably controlled. Incidentally, according to the result of the experiment, if the light amount detection results sampled at a cycle of 1 second are captured for 3 seconds and averaged, it is possible to effectively avoid the malfunction and secure the response speed practically sufficient. did it.

Further, the system control circuit 9 performs the following steps.
In the same way, in SP4
Whether the maximum value and the minimum value are detected and the difference is within a predetermined value
Judgment, if a positive result is obtained here, average value processing
Light intensity detection result A_{N + 1}Is stored in the second register R2
On the other hand, if a negative result is obtained here, step SP3
The process of is repeated. Then, the system control circuit 9
Move to UPSP5, where light intensity detection result A _{N + 1}Is a predetermined value
It is judged whether or not the above, and if a negative result is obtained here, the step
Then, the contents of the second register R2 are transferred to the first SP6.
Transfer to the register R1 and return to step SP4.

That is, in this embodiment, the light receiving element 2
In No. 8, a resistor 29 is connected between the grounds and the transistor 24 is turned on / off according to the terminal voltage of the charging capacitor 19, so that the terminal voltage rises above a predetermined value only when a commercial power source is used. As a result, the system control circuit 9 switches its operation in the light control mode only when the commercial power source is used, and thereby wasteful consumption of the battery 7 can be effectively avoided.

On the other hand, if a positive result is obtained in step SP5, the system control circuit 9 moves to step SP7, where the light amount detection results A _N and A1 stored in the first and second registers R1 and R2 are stored. The difference data of A _{N + 1} is detected, and it is determined whether the absolute value of this difference data is less than or equal to a predetermined value.

If the absolute value of the difference data is equal to or less than the predetermined value, it can be determined that the amount of light in the room has not changed significantly in this case, and the system control circuit 9 obtains an affirmative result. Move to SP6 and step SP
Return to 4. As a result, the system control circuit 9 performs steps SP4-SP5-SP7- with the commercial power source selected.
The processing procedure of SP6-SP4 is repeated to determine whether or not the amount of light in the room has drastically changed.

Here, for example, when a user who has returned home from a place where he / she goes out at night turns on the light in the room, or when the user turns off the light in the room for sleeping, the light receiving element 28 is used.
In this case, the incident light quantity changes abruptly and largely. In the system control circuit 9, step SP7
A negative result is obtained at. As a result, the system control circuit 9 proceeds to step SP8 and determines whether the difference data between the light amount detection results A _N and A _{N + 1} stored in the first and second registers R1 and R2 is equal to or more than a predetermined value. By making a determination, it is determined whether or not the light amount suddenly increases by a predetermined value TH or more.

If the user turns on the indoor light, an affirmative result is obtained, and the system control circuit 9 moves to step SP8, and if the operation mode is held in the standby mode, the system is activated. After rising, the logic level of the control port P is switched. As a result, the system control circuit 9 starts supplying power to the compact disk player 11, the tape deck 12, and the radio 13 when the room lights are turned on while the power is kept off, and then the radio integrated tape recorder 1 is started. To the operation when the power was turned off immediately before, and then step SP10
To complete the procedure.

As a result, the user can start the radio-integrated tape recorder 1 by turning on the light in the room simply by setting the light control mode in advance, which saves the troublesome operation of the power switch and is easy to use. Can be improved.

On the other hand, when a negative result is obtained in step SP8 (this means that the light quantity suddenly increases to the predetermined value TH
System control circuit 9
Then, the process proceeds to step SP11. When the power is turned on here, the entire operation mode is set to the sleep mode for 2 hours, the issuing diode representing the sleep mode is turned on, and then the process proceeds to step SP10. As a result, the system control circuit 9 switches to the standby mode after switching the logic level of the control port P after 2 hours.

Therefore, in the radio-integrated tape recorder 1, the operation mode can be switched to the sleep mode simply by turning off the light in the room for sleeping, whereby the complicated operation can be omitted. For users,
Using a combination of timers, start up the tape recorder with integrated radio 1 only during the time set when waking up,
Even after returning home, the power of the radio-integrated tape recorder 1 can be operated simply by operating the lights in the room, so that the user can listen to music or the like without operating the power of the radio-integrated tape recorder 1. As a result, the usability of this type of radio integrated tape recorder 1 can be improved.

Further, even when the light control mode is switched to the sleep mode, the user is cautioned when the user mistakenly operates the operator in the light control mode by lighting the issuing diode representing the sleep mode. It is possible to improve the usability of the tape recorder with a built-in radio.

In this tape deck 12, the magnetic head or the like can be brought into contact with the magnetic tape by utilizing the pressing force of the operator. Therefore, if the power is simply turned off, the magnetic head or the like will move to the position at the time of reproduction. Remains held in. Therefore, in this embodiment, when the optical control mode is switched to the sleep mode, even if the magnetic tape having the longest recordable time is loaded, the reproduction of the magnetic tape is completed and the power is turned off. In addition, the power supply is turned off after 2 hours, so that the damage to the magnetic tape can be effectively avoided.

Further, the operator in the light control mode is formed by a tact switch which holds the contact of the contact, whereby the radio integrated tape recorder 1 is formed.
In the above, once the light control mode is set, the light control mode is continuously held until the light control mode is released by pressing the operator again. Also, the operation can be simplified.

Therefore, in this light control mode, the system control circuit 9 switches over the entire operation when an operator such as a power switch is operated in the same manner as in the normal operation mode. The entire operation is controlled to improve the usability of the radio-integrated tape recorder 1.

(2) Effects of the Embodiments According to the above configuration, in the light control mode, the indoor brightness is detected by the light receiving element, and when the indoor brightness suddenly becomes bright, the power is turned on, Furthermore, when the indoor brightness suddenly becomes dark, the operation of the power supply can be simplified by switching to the sleep mode, and the overall usability can be improved accordingly.

(3) Other Embodiments In the above-described embodiments, the case where the light in the room is detected by using the light receiving element made of Cds has been described, but the present invention is not limited to this, and a phototransistor or the like is used. The light receiving element can be widely applied.

Further, in the above-mentioned embodiment, the case where the operation is switched based on the light quantity detection result only in the case of the commercial power source has been described, but the present invention is not limited to this, and is also applied to the case of battery if necessary. can do.

Further, in the above-mentioned embodiment, the case where the light amount is detected at a cycle of 1 second and the detection result is taken in for 3 seconds and averaged is described. However, the present invention is not limited to this, and experimental results According to the above, it was possible to secure a practically sufficient operation by averaging the light amount detection results in the range of about 2 to 4 seconds.

Furthermore, in the above-mentioned embodiments, the case where the indoor brightness is detected by the light receiving element to turn on the power supply and switch to the sleep mode has been described, but the present invention is not limited to this, and only one of them is used. You may make it apply.

Further, in the above-mentioned embodiment, the case where the present invention is applied to the radio integrated tape recorder incorporating the compact disc player has been described, but the present invention is not limited to this, and the system stereo, and further the television receiver. It can be widely applied to audio equipment such as.

[0054]

As described above, according to the present invention, when the amount of extraneous light entering the light receiving element increases by a predetermined value or more and is increased, the power is turned on and the amount of extraneous light entering the light receiving element is increased. When it changes by a predetermined value or more and decreases, by switching to the sleep mode, the operation of the power supply can be simplified, and the acoustic device that can improve the usability of the whole can be obtained.

[Brief description of drawings]

FIG. 1 is a block diagram showing a radio-integrated tape recorder according to an embodiment of the present invention.

FIG. 2 is a flowchart for explaining the operation.

FIG. 3 is a schematic diagram for explaining the operation.

[Explanation of symbols]

1 ... Radio integrated tape recorder, 2 ... Power cord, 5 ... Switch, 7 ... Battery, 8 ... Regulator, 9 ... System control circuit, 11 ... Compact disk player, 12 ... Tape deck, 13 ...... Radio, 28 …… Light receiving element.

Claims (3)

[Claims] 1. A light amount detection mechanism that outputs a light amount detection signal whose signal level changes according to the amount of external light, and the amount of external light changes and increases by a predetermined value or more based on the signal level of the light amount detection signal. Then, an audio device comprising a control circuit for turning on the power supply. 2. A light amount detection mechanism that outputs a light amount detection signal whose signal level changes according to the light amount of the external light, and the external light amount changes by a predetermined value or more and decreases based on the signal level of the light amount detection signal. Then, an audio device comprising: a control circuit that turns off the power after a predetermined period of time. 3. The audio device is adapted to be able to start up a power source by selectively using a predetermined battery and a commercial power source, and the control circuit, when the commercial power source is selectively used, the light amount. The power supply is turned on based on the signal level of the detection signal, or the power supply is turned on after a predetermined period has elapsed based on the signal level of the light amount detection signal. The audio device according to 2.