JP3154196B2 - Electronics - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic apparatus equipped with a reception tuning means such as an FM tuner and an AM tuner.

[0002]

2. Description of the Related Art FM tuners and AM tuners are constructed as a single radio receiver only by their reception functions, and are additionally or parallelly mounted in electronic equipment such as a CD player and a cassette tape player. There are cases. In any case, in recent years, portable electronic devices have become widespread, and there is a demand for miniaturization of devices and simplification of operation.

In order to improve the operability of an FM / AM radio tuner, a reception frequency channel is set in advance in accordance with a broadcasting station and held as a so-called preset channel, and the user presses a tuning button. Only, it is configured so that the broadcast wave of each broadcasting station is sequentially controlled, and the user may press the tuning button a required number of times until the broadcast of the broadcasting station desired to be heard is received What has been done is widely known. In particular, by implementing such a channel selection operation method, it is only necessary to provide one operation button for channel selection, which is suitable for miniaturization of electronic equipment.

[0004]

By the way, in such a preset operation system, for example, presetting of ten broadcasting stations is possible, and usually, presetting is performed in a predetermined order such as a lower frequency or an order in which the preset was performed. Each frequency is stored in the storage means with a number assigned on software. For example, the preset number 1 is set to 87.50 MHz, the preset number 2 is set to 98.00 MHz, and so on.

Each time the user operates the tuning button, the preset number is changed from 1 → 2 → 3 →... → 10 → 1.
... The frequency designated is determined based on the preset number, and the reception tuning control is executed. However, in such a channel selection method, it is necessary to press the channel selection button many times until a desired broadcast station is obtained, and there is a problem that the operation may be extremely troublesome. For example, if the user wants to listen to the preset number 4 channel after listening to the preset number 5 channel, the user must press the tuning button nine times.

Of course, such a problem can be solved by providing a direct channel selection button using a numeric keypad or the like and a key for decrementing the preset number. However, providing a direct channel selection button or a so-called up / down key is not necessary for equipment. Contrary to the demand for miniaturization, it is not preferable.

Further, portable radio receivers are often used, for example, in pockets or bags. For this reason, even if a display unit for displaying the current reception channel is provided, it is rare to see it. Of course, a device without a display unit cannot confirm the current reception channel.

Therefore, even if the user stores the correspondence between the preset number and the broadcast station, the current preset number cannot be checked (or it is troublesome to check the display unit one by one). There is also a problem that it is difficult to perform a correct tuning operation because it is not known how many times the tuning button has to be operated up to that time.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to realize a tuning operation with good operability by one tuning operation means. An electronic device suitable as a device is provided.

That is, a storage means in which a plurality of reception frequency channels to which preset numbers are assigned is stored in advance, and one reception frequency channel is selected from reception frequency channels (preset channels) stored in the storage means. In the electronic device having a tuning operation means and a control means for controlling the reception tuning operation according to the frequency in the reception frequency channel designated by the tuning operation means, the control means, every time the tuning operation means is operated The control is executed by determining that the reception frequency channel specified by incrementing the preset number has been changed to the reception frequency channel with the next number,
When the tuning operation means is continuously operated for a predetermined time or more, the control is executed by determining that the reception frequency channel stored with the leading preset number added is designated. .

After the leading preset number is designated by the continuation operation of the tuning operation means, it is assumed that there is no change in the designated preset number even if the continuation operation is continued. When the continuation operation is continued, the preset number designated at regular intervals may be incremented, and reception control may be performed according to the preset number.

[0012]

By returning to the first preset number (preset number 1), the number of times of operation of the tuning operation means can be reduced in many cases. Also, even without confirming the current reception channel (preset number), once returning to the first preset number, the user can grasp the number of presses up to the desired preset number based on this.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. In this embodiment, the present invention is applied to a portable CD player (hereinafter, referred to as a radio-equipped CD player) equipped with an FM and AM receiving unit. FIG. 2A is a perspective view showing an appearance of the CD player with radio 1 of the embodiment, and FIG. 2B is a perspective view showing a state where a lid is opened.

In FIG. 2, reference numeral 1 denotes the entire radio-equipped CD player, 2 denotes a cabinet, and the cabinet 2 comprises an upper cabinet 3 and a lower cabinet 4. A lid 5 is attached to the upper cabinet 3 so as to be rotatable up and down with its rear end as a fulcrum.

The cover 5 is provided with a window 6 through which the loading of a CD or the like can be confirmed. A chucking member 7 is provided at a substantially central portion inside the lid 5.
Is provided, and the optical head 8 is mounted to reproduce the loaded CD.

Open button 8 for opening and closing lid 5
Is provided at the front of the upper cabinet 3, and
Operation keys 9, 10, 11, 12, 13, 14, and 15 for controlling the operation of the CD and the radio reception operation are provided. The operation key 9 is a playback key for performing a CD playback operation, and also serves as an operation key for a pause operation.
Further, the reproduction key 9 also functions as a power key. That is, by operating the reproduction key 9 from the power-off state, the power is turned on, and the reproduction operation of the loaded CD is started as it is.

The operation key 10 is a stop key for stopping the rotation of the CD, and also serves as a radio off key for stopping the radio broadcast receiving operation. Reference numeral 11 denotes a radio on key for starting radio reception, which also serves as a preset channel selection operation key described later. That is, the radio reception is started by pressing the operation key 11 from the CD operation state or the power-off state, and thereafter, the broadcast station channel is changed by pressing the operation key 11.

The operation keys 12 to 15 are used for controlling a reproducing method and a reproducing operation during a CD reproducing operation. That is, 12 is a repeat playback key, 13 is a playback mode key for designating execution of intro scan playback, shuffle playback, and the like, and 14 and 15 are search / A for searching for the beginning of a song.
MS key.

During radio reception, 12 functions as an enter key for the user to store a preset frequency, and 13 functions as an AM / FM switching key. Further, 14 and 15 are, for example, 10 KHz or 1
These are tuning keys in the + direction and the-direction for switching the reception frequency in units of 00 KHz.

Reference numeral 16 denotes a display unit using a liquid crystal panel.
It is provided to display data D, operation status, radio reception frequency (and preset number), and the like. 1
Reference numeral 7 denotes a volume control unit, reference numeral 18 denotes a headphone jack, reference numeral 19 denotes a bass boost switch for selecting a mode for emphasizing bass, and reference numeral 20 denotes a hold switch. When the hold switch 20 is slid to the ON position, the stop key 10, the play key 9, the search / AMS key 1
Even if buttons 4 and 15 are pressed, these operation keys do not function. In other words, the operation state is not changed by the key operation, and erroneous operation at the time of carrying is prevented.

Reference numeral 21 denotes a resume key.
Is controlled. For example, when the resume key 17 is slid to the ON position during CD playback, the music number, time, and each mode at the time of stop are displayed on the display unit 11. On the other hand, when the resume key 17 is slid to the off position, the total number of songs, the total time, and each mode are displayed on the display unit 11.

Reference numeral 22 denotes an FM mode selection key for selecting monaural / stereo. A tuner sense key 23 changes the reception sensitivity mode. Reference numeral 24 denotes a line-out jack for reproducing CD audio, and reference numeral 25 denotes an input terminal of an external power supply.

FIG. 3 is a block diagram of the CD player with a radio. The loaded CD 30 is driven by a spindle motor 32 driven and controlled by a motor control unit 31 to produce a CLV.
(Constant linear velocity). Then, the optical head 33
, The information recorded on the CD 30 is read.

The optical head 33 has an optical system including, for example, a laser diode, a deflection beam splitter, a quarter-wave plate, an objective lens, etc., and is provided with an optical detector for detecting reflected light. The laser light output from the laser diode is applied to the recording surface of the CD 30 via the optical system, and the reflected light based on the obtained pit shape is incident on the optical detector via the optical system and output as an electric signal. .

The objective lens can be moved in the direction of coming and coming from the disk and in the radial direction of the disk by a biaxial mechanism, and focus and tracking control is performed. Further, a thread mechanism is provided for sliding the entire optical head 33 in the disk radial direction at the time of seeking or the like.

The reproduction output from the optical head 33 is processed by an operation / amplification unit 34 and then supplied to a decoding unit 35.
Reproduction data is extracted. That is, control data such as digital audio signals, address data, time code data, and TOC information are extracted. 36 is a RAM for holding decoded data and data used for decoding processing
It is.

The difference information such as the astigmatism information and the push-pull signal obtained by calculating the output of the optical head 33 is supplied to the head servo unit 37 as a focus error signal and a tracking error signal. Also,
A track jump command is supplied to the head servo unit 37 from a system control unit 41 constituted by a microcomputer. The head servo unit 37 generates a servo drive voltage based on a focus error signal, a tracking error signal, and a track jump command,
The two-axis mechanism and the thread mechanism are driven as described above.

The digital audio signal reproduced by the decoding unit 35 is supplied to a digital filter and a D / A conversion unit 38, and is further supplied to a terminal 40 via an analog amplifier 39.
Is output as an analog audio signal. The control data reproduced by the decoding unit 35 is supplied to the system control unit 41.

The display section 16 displays required data under the control of the system control section 41. Reference numeral 42 denotes an operation input unit, and the various operation keys 9, 10, 1 described above are provided.
2, the keys by the pressing operations of 2, 13, 14, and 15, the base boost key 19, the hold switch 20, the resume key 21, the FM mode selection key 22, and the tuner sense key 23 are comprehensively shown. The operation information from the operation input unit 42 is supplied to the system control unit 41, and the system control unit 41 controls each required unit based on the operation information.

Reference numerals 43 and 44 denote storage means for holding programs and various data for the control operation of the system control unit 41. Reference numeral 43 denotes a non-volatile RAM backed up by a battery or the like, and reference numeral 45 denotes a ROM. The preset number and frequency for selecting a broadcasting station in the radio operation mode are held in the RAM 43 or the ROM 44.

Reference numeral 50 denotes an FM antenna unit, 51 denotes an RF amplifier, and 52 denotes a mixer circuit. The 53 division ratio is set by the tuning control signal S _P output from the system control unit 41, a PLL circuit for performing a so-called PLL operation, the PLL circuit 53, the low-pass filter 54, a voltage controlled oscillator (VCO) 55, a buffer By the circuit 56,
A local oscillation frequency generator for generating a reference local oscillation frequency for FM reception tuning is formed. The output of the mixer circuit 52 is supplied to an intermediate frequency amplifying unit 58 via a ceramic filter 57, converted into an intermediate frequency, detected by an FM detector 59, and then supplied to a multiplexer 60.

Reference numeral 61 denotes an AM antenna unit, and 62 denotes a mixer circuit. The mixer circuit 62 includes a PLL circuit 53, a low-pass filter 54, a voltage controlled oscillator (VCO) 63, and a local frequency generation unit formed by a buffer circuit 64. Provides a reference local oscillator frequency for AM reception tuning. The output of the mixer circuit 62 is supplied to an intermediate frequency amplifying unit 66 via a ceramic filter 65, converted to an intermediate frequency, detected by an AM detector 67, and then supplied to a multiplexer 60. The multiplexer 60 supplies the FM reception signal to the terminal 40 in the FM reception mode,
In the reception mode, the AM reception signal is supplied to the terminal 40.

The preset channel selection operation executed by the system control unit 41 in such a CD player with radio 1 will be described below with reference to FIG. The tuning operation of FM or AM broadcasting is performed by the system control unit 4 as described above.
While tuning control signal S _P from 1 PLL circuit 53 is performed by supplying, the system control unit 41, the tuning control signal corresponding to the operation by the user of the preset tuning operation key 11 or the tuning key 14, 15 _SP will be generated.

In particular, in order to improve operability, as shown in FIG.
Zero frequency channels are stored in the RAM 43 or the ROM 44 in advance corresponding to the preset numbers, and the user can sequentially designate the preset data by pressing the preset tuning operation key 11. In this example, the same frequency is duplicated and stored, but this is a value preset at the manufacturing stage, for example, and can be rewritten as desired by a user's registration operation.

FIG. 1 shows a processing routine corresponding to the operation of the preset channel selection operation key 11. By pressing the operation key 11 which also functions as a radio-on key, the CD player 1 with a radio operates as an AM or FM receiver. Start operation. The band mode of AM / FM is selected by the operation key 13 when the radio is turned on. For explanation, it is assumed that the band mode is FM.

When the radio operation is started, first, the system control unit 41 sets the preset number to an initial value (ie, 1) or a value (last memory value) selected last in the previous radio reception operation (F101). ), A tuning control signal _SP is generated based on the frequency at the preset number, and the tuning operation is executed (F103).
Further, the reception frequency, the band mode, and the preset number are displayed on the display unit 16 (F104).

If the operation key 11 is pressed again (F
102), this operation is understood to be an operation as the preset channel selection operation key 11, and first, time counting by the internal timer means is started (F105). Then, it is determined whether or not the pressing operation of the preset channel selection operation key 11 is continuously performed for one second or more (F105). If the pressing operation is completed in less than one second, it is determined that the operation is a switching operation to the reception of the next preset number to the broadcast station, and the preset number is incremented.
Switch _P (F107), clear the timer (F108),
PLL circuit 5 so that the next preset frequency is received.
3 and also switches the display contents on the display unit 16 (F107 → F108 → F103 → F104).

Accordingly, when the user presses the preset channel selection operation key 11 a required number of times, the channels are switched in the order of the preset numbers, and a desired broadcast station can be selected.

However, if it is determined in step F106 that the preset tuning operation key 11 has been continuously pressed for more than one second, the system control unit 41 sets the preset number to "1", and The receiving operation control based on the frequency is executed (F109). At the same time, the display contents on the display section 16 are also displayed with the first preset number “1” and the frequency “8”.
0.00MHz "and band mode" FM "(F110). And after clearing the timer means (F111),
After the pressing of the preset channel selection operation key 11 is released (F112), the process returns to step F102.

That is, when the user wants to return the preset number to "1", the preset channel selection operation key 11
It is sufficient to keep pressing for more than one second. For example, when the preset number is set to "5" and the user wants to receive the broadcast station with the preset number "4", the preset number is temporarily changed by the continuous press operation. After returning to "1", 3
It only has to be pressed twice, "5""6" ... "10""1"
It becomes unnecessary to perform the preset number increment operation such as "2" and "3" nine times and switch to "4".

For example, when it is desired to switch to "4" when the current preset number is not known, even if the current preset number is not displayed on the display unit 16 and confirmed, it is necessary to temporarily press "1". Can be determined to be pressed three more times, so that it is very convenient to view the display unit 16 when performing a portable operation.

FIG. 5 shows the processing of the system control unit 41 according to another embodiment of the present invention, and includes steps F201 to F208.
Are the same as steps F101 to F108 in FIG. In this embodiment, it is determined that the preset channel selection operation key 11 has been pressed for more than one second, the preset number is returned to the first preset number “1”, and tuning control and display control using the preset number “1” are performed. (F206 →
(F209 → F210) If the preset channel selection operation key 11 is continuously pressed, the preset number is incremented every predetermined time.

For example, in step F 211, the pressing of the preset channel selecting operation key 11 is further continued, and 4 seconds have passed (that is, 3 seconds have passed since the preset number was set to “1”), or 4 seconds. It is determined whether the pressing has been released before the lapse of time.If the pressing has been released, the timer is cleared (F208), and the process returns to step F202.If the pressing has been continued for 4 seconds or more, the preset number is incremented (F21).
2). Then, while performing the tuning control and the display control based on the preset number (in this case, “2”) (F213, F214), it waits for another one second, for example (F215), and determines whether the pressing of the preset channel selection operation key 11 is released. It is determined whether or not it is (F216). If not released, the flow returns to step F212 to increment the preset number. When the pressing operation is released, the timer is cleared (F208), and step F2
To return to 02, in steps F203 and F204, tuning and display control based on the preset number at that time (that is,
The processing of F213 and F214 is continued.

In this embodiment, once the preset number is returned to "1" by the continuous push, the continuation operation is further continued, so that the preset numbers become "2" and "3".
There is an advantage that the user does not need to perform the pressing operation many times before receiving the desired broadcast station because it is changed to “4”.

Although the processing shown in FIG. 1 and the processing shown in FIG. 5 in the embodiment are opposite to each other in the processing method after the preset number is returned to the top, either one is selected according to the adopted equipment. I just need. Also, the determination time of the continuous operation,
The determination time of the continuation operation continuation in FIG. 5 is also set according to the device. Of course, various specific processing flows are conceivable.

[0046]

As described above, the electronic device of the present invention can be used as an operation of a preset number for selecting a broadcasting station.
By pressing the tuning operation means for incrementing the preset number continuously for a predetermined time or more, the operation returns to the first preset number, so that the operation of both the direct tuning operation key and the preset number up / down operation is performed. Even if no key is provided, the number of operations required until a desired broadcast station is selected can be reduced, which simplifies the operation and has the effect of meeting the requirement of reducing the number of installation keys. Further, by returning to the top preset number by the continuation operation, the user can perform the selection operation based on the top preset number without confirming the currently selected preset number on the display unit or the like. There is. Due to these effects, the present invention is particularly suitable as a small portable electronic device.

[Brief description of the drawings]

FIG. 1 is a flowchart showing one embodiment of the present invention.

FIG. 2 is a perspective view showing the appearance of a CD player with radio according to the embodiment.

FIG. 3 is a block diagram of a CD player with a radio according to the embodiment.

FIG. 4 is an explanatory diagram of preset data.

FIG. 5 is a flowchart showing another embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 CD player with radio 11 Preset tuning operation keys 16 Display unit 41 System control unit 43 RAM 44 ROM 53 PLL circuit

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H03J 5/00-7/20 H04N 5/44

Claims (3)

(57) [Claims] 1. A storage unit in which a plurality of reception frequency channels numbered in a certain order are stored in advance, and one reception frequency channel is selected from the reception frequency channels stored in the storage unit. An electronic device comprising: a tuning operation means; and a control means for controlling a reception tuning operation according to a frequency in a reception frequency channel designated by the tuning operation means, wherein the control means operates the tuning operation means. Every time
When the specified reception frequency channel is changed to the reception frequency channel to which the next number is attached and the control is executed, and when the tuning operation means is continuously operated for a predetermined time or more, the plurality of reception frequency channels are changed. An electronic device configured to determine that a reception frequency channel stored with a leading number among the reception frequency channels is designated and to execute control. 2. The control means according to claim 1, wherein, when said tuning operation means is continuously operated for a predetermined time or more, a reception frequency channel stored with a leading number among said plurality of reception frequency channels. And determining that the designated receiving frequency channel is not changed even if the continuation operation of the tuning operation means is continued while determining that is designated. Electronic device as described. 3. The receiving frequency channel stored with a leading number among the plurality of receiving frequency channels when the tuning operation means is continuously operated for a predetermined time or more. Is determined to have been designated and the control is executed. Further, each time the continuation operation of the tuning operation means is continued for a predetermined time or longer, it is determined that the designated reception frequency channel is sequentially changed in the order of the number. The electronic device according to claim 1, wherein the electronic device performs the control.