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US005170159A
United States Patent [19]
[11] Patent Number:
Kawabata et al.
[45]
[54]
SLEEP TIMER FOR AUDIO/VISUAL
APPARATUS AND METHOD OF SLEEP
TIMER OPERATION
5,170,159
Date of Patent:
[56] 7'
Dec. 8, 1992
References Cited
U.S. PATENT DOCUMENTS
3,843,929 10/1974 Mayle .
4,158,759
[75]
Inventors:
Yoshihiro Kawabata; Takehiko
K
'
- K
k da; Sh‘ "
533333;;
Kim]?
759-011029
60-90476
_
_
Assignee:
_
Mason ........................ .. 2l9/lO.55B
FOREIGN PATENT DOCUMENTS
Ishikawa, all of Tokyo, Japan
[73]
1/1979
4,241,450 12/1980 Blatter et a1 ...................... .. 358/190
_
60-202384
Pioneer Electronic Corporatmn,
Tokyo, Japan
1/1984 Japan . 7
5/1985 Japan .
10/1985
Japan .
1 1.32133 2/1989 Japan ]
2023363 12/1979 United Kingdom .
Primary Examiner-Donald J. Yusko
[21] Appl. No.: 636,473
[22] Filed:
[30]
Assistant Examiner-Brian Zimmerman
Attorney, Agent, or Firm-Sughrue, Mion, Zinn,
Macpeak 8‘ Seas
[57]
ABSTRACT
A sleeper timer for the source equipment of audio/
Dec. 31, 1990
Foreign Application priority Data
1
5 1990 JP
an. ,
[
1
]
2 287
apan ...................................... ..
visual apparatuses such as a cassette tape deck, CD
-
player’ AM/FM tuner’ and video disk play incorporates
[51]
Int. Cl.5 ............................................. .. H04Q 1/00
an auto sleep mode where the source equipment are
turned off as soon as the source equipment completes its
[52]
us. C1. .......................... .. 340/825.22; 455/ 181.1;
operation, and a conventional sleep timer mode where
[58]
455/231; 358/349
Field of Search .................... .. 340/825.22, 309.15,
the source equipment are turned off when a predeter
mined length of time of a timer expires.
340/3094; 455/181, 231, 229, 182; 219/1055
B; 358/349, 190
7 Claims, 5 Drawing Sheets
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US. Patent
Dec. 8, 1992
Sheet 3 of 5
5,170,159
FIG. 3
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PLAYING N G
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9
US. Patent
Dec. 8, 1992
Sheet 4 of 5
5,170,159
FIG.4
SET TIMER
TO 9OMIN
S11
SET TIMER
To 60 MIN 8
DISPLAY"60"
L
Y
sET TIMER
To 30 MIN 8
DISPLAY "30"
TuRN OFF
POWER
END
S24
TuRN OFF
POWER
(END)
S21
US. Patent
Dec. 8, 1992
Sheet 5 of 5
5,170,159
FIG.5
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5,170,159
2
tion recorded in the disk, and a signal indicative of the
absence of broadcast wave which indicates the broad
cast is over. When the CPU receives these signals indic
SLEEP TIMER FOR AUDIO/VISUAL APPARATUS
AND METHOD OF SLEEP TIMER OPERATION
ative of the completion of reproduction, recording, or
BACKGROUND OF THE INVENTION
5 broadcast, it outputs a command to a power-turn-off
circuit to turn off the source equipment.
In the conventional timer mode, the CPU starts moni
1. Field of the Invention
The present invention relates to a method of sleep
timer operation and a timer, and more particularly to a
toring the timer output for the expiration of a predeter
mined length of time setting. When the CPU detects
method of sleep timer operation and a sleep timer used
that the timer times to zero, the CPU sends a command
to the power-turn-off circuit so as to turn off the source
in audio/visual apparatuses such as a tape deck, CD
(compact disk) player, tuner, and video recording/re
producing apparatus.
equipment.
According to the present invention, a method of
setting in a standby condition source equipment for
2. Prior Art
Some audio/visual apparatuses are provided with a
so-called sleep timer which operates to automatically 15 audio/visual apparatuses having a timer, comprises
turn off the apparatus when a predetermined length of
steps of:
time has elapsed so that the apparatus is not left turned
on after the user has fallen asleep.
outputting, when commanded by an operator, a ?rst
signal for activating a timer operation which has a ?rst
The conventional sleep timers have a plurality of time
timer mode and a second timer mode;
selecting said ?rst timer mode if at least one of the
settings of predetermined lengths, for example, 90, 60,
and 30 minutes, each of which is selected in a cyclic
source equipment is operating, and selecting said second
manner such as 90, 60, 30, 90, . . . , each press of a sleep
timer mode if none of the source equipment is operat
key. When a user wants to enjoy a music tape in bed till
ing;
he falls asleep, this type of timer must be set to 60 min
setting a predetermined length of time to the timer
when said second timer mode is selected;
outputting a second signal in the ?rst timer mode
when the source equipment completes an operation
thereof, and outputting a third signal when said prede
termined length of time of said timer expires; and
setting said source equipment in a standby condition
utes if the required time for reproducingthe audio infor
mation in the tape is, for example, 45 minutes. In this
case, the tape deck remains turned on for some time
after the reproduction of the music tape has completed.
Also, when the user wants to listen to the radio or
watch television in bed till he falls asleep, the tuner
noise continues to radiate from the speaker or the pic
ture and sound continue if the broadcast is over before
in response to said second signal as well as said third
signal.
the timer times to zero.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a
sleep timer in which an auto sleep mode is incorporated
as well as a conventional sleep timer mode so that the
BRIEF DESCRIPTION OF THE INVENTION
35
Features and other objects of the present invention
will be more apparent from the description of preferred
embodiments with reference to the accompanying
waste of electric power and the continuous radiation of
drawings in which:
as soon as the reproduction and/or recording of the
showing the operation of the present invention;
background noise from, for example, a speaker are pre 40 FIG. 1 is a block diagram showing an embodiment of
the present invention;
vented by turning off the source equipment of audio/
FIG. 2 illustrates a sample display of a displayer
visual information recording/reproducing apparatuses
FIG. 3 is a ?owchart showing the operation of the
Another object of the invention is to provide a sleep 45 auto sleep mode of the present invention;
information is over.
tional sleep timer mode is selectively set through a sim
FIG. 4 is a ?owchart showing the operation of a
conventional timer operation, which is also part of the
ple press operation of a single sleep key on the panel.
operation of the present invention; and
Still another object of the invention is to provide a
method of sleep timer operation in which an auto sleep
mode and a conventional sleep timer mode are selec
tively set.
FIG. 5 is a flowchart showing another embodiment
of the auto sleep mode of the present invention.
timer in which one of an auto sleep mode and a conven
DESCRIPTION OF THE PREFERRED
EMBODIMENT
When a sleep key is pressed, a program is run so as to
FIG. 1 is a block diagram showing an embodiment of
perform the timer operation for the audio/visual source
equipment. If the source equipment such as a cassette 55 a sleep timer according to the present invention.
A microcomputer 6 incorporates a ROM 6b, timer 6c,
tape deck, or CD player is in the recording mode or the
CPU 6d, and input/output ports 60 and 6e. The CPU 6d
reproducing mode, the auto sleep mode is entered. A
carries out the program instructions of a sleep timer
displayer, then, indicates that the source equipment is
program stored in the ROM 6b so as to control the
now in the auto sleep mode. If the tape deck is neither
operation of a sleep timer according to the present in
in the recording mode nor in the playback mode and the
vention.
CD player is not playing back, the conventional sleep
A sleep key 4 is a key that serves as a sleep timer
timer mode is entered.
activating means for setting and disabling the auto sleep
In the auto sleep mode, a CPU starts monitoring
timer mode as well as the conventional sleep timer
signals indicative of the end of operation of the source
equipment, such as the output of a photo interrupter 65 mode. The CPU operates as a timer-mode selecting
means which selects either the auto sleep timer mode or
output from the tape deck when the playback of the
the conventional sleep timer mode in response to a
cassette tape is over, an end code from the CD player
command signal from a user supplied via the sleep key
which indicates the end of reproduction of the informa
3
5,170,159
4. The CPU also operates as a time-up-detecting means
which detects the expiration of set time to output a
command to a power-turn-off circuit 5, which functions
as a power-turn-off means, so that the source equipment
is turned off. The source equipment includes a DAT
(digital audio tape) recorder 10, video disk (laser disk)
player 8, FM/AM tuner 3, VTR (video tape recorder)
9, television set 11, cassette tape deck 1, and CD player
2. For digital equipment such as DAT (digital audio
4
sleep mode is actually entered. In the auto sleep mode,
a decision is made based on whether the cassette tape
deck 1 is in the record mode or in the playback mode, or
either the tape deck 1 or the CD player 2 is in the repro
ducing mode. The CPU starts monitoring the informa
tion from the cassette tape deck for the end of cassette
tape. The CPU also receives a variety of control-signals
from the CD player to detect the end code indicative of
the end of information recorded in the disk being played
tape) recording-reproducing apparatuses and video disk
(laser disk) reproducing apparatuses, the completion of
10 back. When the CPU receives signals indicative of the
recording/reproduction is detected by means of a con
ventional way, for example, control codes such as end
code, and for an audio tape deck or the like the end of
circuit 5 to turn off the source equipment so that the
the magnetic tape is detected through the use of, for
limited number of circuits are left on for, for example, a
example, a photo interrupter (not shown) that is
mounted to the reel shaft to rotate together with the
shaft to detect the stoppage of the take up reel, For
equipment such as FM/AM tuners and television sets,
the completion of broadcast is detected by the absence
of the broadcasting wave.
Additionally, the CPU receives associated informa
completion of reproduction of the source equipment,
the CPU outputs the command to the power-turn-off
equipment goes into a standby condition where only the
clock and the reception of remote control signals.
If the sleep key 4 is pressed again during the ?ve
second period after the sleep key 4 is ?rst pressed, the
program goes into the conventional sleep timer mode.
A display (0) in FIG. 2 shows a sample display of the
displayer 7 when the 90 min. timer is set. Pressing the
sleep key 4 in a similar manner allows the timer settings
to be selected in order, i.e., 60 min., 30 min., and then
disabling the timer as denoted by displays (cl) and (e) in
FIG. 2. Further pressing the sleep key 4 causes the
tion such as the types and kinds of the respective source
equipment, the names of tunes to be reproduced and
time required for the remaining tunes or programs from
the cassette tape deck 1 and CD player 2 via an input
timer to be disabled and the program to return to its
output device I/O, and sends the information to the
initial
step and the displayer 7 indicates the initial condi
displayer 7 so as to indicate appropriately. The dis
tion of the source equipment with the remaining repro
player 7 will be described later in more detail with
reference to FIG. 2. In the auto sleep mode, the CPU 30 duction time of the third tune having decreased to 58
seconds as shown in a display (0 in FIG. 2. In this man
operates as an auto sleep means and detects the comple
tion of reproducing operation of the source equipment
to turn off the source equipment. In the conventional
ner, the program goes through the respective steps of
setting timers in order each time the sleep key 4 is
pressed, i.e., auto sleep mode, conventional sleep timer
sleep timer mode, when the timer times up, the CPU
outputs the command to the power-turn-off circuit 5 to 35 mode, 90 min., 60 min., 30 min, disabling the sleep timer
mode, auto sleep mode, . . . etc.
turn off the source equipment. In either of the modes,
Once the timer has been set in the conventional sleep
the source equipment are turned off as soon as the re
timer mode, the CPU starts monitoring the timer out
production or recording operation is over so that the
put. When the CPU detects the expiration of timer
equipment goes into a standby condition where only
circuits necessary for performing minimum required 40 setting, the CPU outputs the command to the power
turn-off circuit 5 to shut off the power to the source
functions such as clock operation and the reception of
equipment so that the equipment go into a standby con
remote control signals, remain turned on. The timer 6c
dition where only a minimum number of circuits are left
on for performing functions such as a clock and recep
the timer 60 for a time length for which the source
equipment is held turned on after the conventional 45 tion of remote control signals.
timer mode is selected.
DESCRIPTION OF FLOWCI-IART
operates as a sleep-time-setting means and the CPU sets
Operation
described with respect to a cassette tape deck and a CD
The operation of an embodiment of a sleep timer
according to the present invention will now be de
scribed in detail with reference to ?owcharts in FIGS.
player used as source equipment. In FIG. 2, a display (a)
3 and 4 showing the operation of the invention with
shows the panel of CD player 2 in the reproduction
mode before the sleep key 4 is pressed. The display (a)
respect to the cassette tape deck 1 and CD player 2 used
The operation of the present invention will now be
as source equipment.
A decision is made based on whether the sleep key 4
recorded in the disk is being played back and the re 55 has been pressed (step 1). If the sleep key 4 is pressed,
maining time of the third tune is one minute and 44
then a display 7 displays “Auto” (step 2). Then, a deci
seconds. When the sleep key 4 is pressed, the program
sion is made based on whether a predetermined time,
shows that the third tune out of a total of eight tunes
stored in the ROM 6b is run so as to perform the timer
for example, ?ve seconds has elapsed after the sleep key
operation of the present invention.
4 is ?rst pressed (step 3A); if NOT, then a decision is
The display (b) shows the CD player 2 in the auto 60 made based on whether or not the sleep key 4 is pressed
sleep mode when the sleep key 4 is ?rst pressed. The
again (step 3B). If ?ve seconds has passed at step 3A,
characters “Auto” appears in the time-displaying win
then the program goes into the auto sleep mode accord
dow, and a star and moon symbol and characters
ing to the present invention. A decision is made whether
“SLEEP” are shown above the window so as to inform
or not the cassette tape deck 1 is in the record mode
the user that the auto sleep mode has been selected. The 65 (step 4). If the deck 1 is in the recording mode, then a
program waits, for example, ?ve seconds while moni
decision is made whether or not the end of tape is de
toring the operation of sleep key 4. If the sleep key is not
pressed again during the ?ve seconds, then the auto
tected (step 5); if YES, the program proceeds to step 10
to send a command to the power-turn-off circuit 5 so as
5
5,170,159
to allow all the source equipment to be in a standby
condition.
Ifthe deck I is not in the recording mode at step 4,
6
passed after the 30 min. timer is set (step 22); if ?ve
seconds has passed, then the program proceeds to step
23 to monitor output of the timer till the setting of 30
the program proceeds to step 6 to make a decision based
on whether or not the selected function is CD. The term
function is used in the present invention to refer to what
min. expires. When the 30 min. timer times to zero, the
program sends the command to the power-turn-off
source equipment to be reproduced has been selected by
the user. For example, if the function is CD, then an
audio signal from the CD is radiated from the speaker.
If the function is the CD player 2 at step 6, the program
standby condition (step 24).
proceeds to step 7 to make a decision whether the CD
within ?ve seconds after the 30 min. timer is set; if
NOT, the program returns to step 22, if YES, the pro
is in the playing mode; if YES, the program proceeds to
step 8, if NOT, the program jumps to step 11 in FIG. 4.
When the end code from the CD player is detected at
step 8, then the program proceeds to step 10 to allow all
the source equipment to be in a standby condition.
Ifthe function is not CD at step 6, then the program
proceeds to step 9A to make a decision whether the
circuit 5 to allow all the source equipment to be in a
If ?ve seconds has not passed yet at step 22, the pro
gram proceeds to step 25 to make a decision based on
whether or not the sleep key 4 has been pressed again
gram disables all the settings of timer (step 26) and
returns to step 1. At this time, the displayer 7 returns to
the initial display as depicted by the display (0 in FIG.
2 before the aforementioned timer setting procedure is
taken again. Of course, the reproduction of information
of the CD is going on while the auto sleep timer mode
function is the cassette tape deck; if YES, the program
or the conventional sleep timer mode is being set.
proceeds to step 9B, if NOT, the program jumps to step 20 Therefore, the remaining time of the third tune is now
11 inv FIG. 4. When the end of tape is detected at step
58 seconds as depicted by (f) in FIG. 2. After the pro
9C, then the program proceeds to step 10 to allow all
gram has returned to step 1, every time the sleep key 4
the source equipment to be in a standby condition.
is pressed, the aforementioned steps l-26 are processed
It should be noted that in the ?owchart in FIG. 3, a
in order.
priority is given to the recording mode of the cassette 25 While the above-described embodiment has been
tape deck 1 so that when the deck 1 is in the recording
described with respect to the cassette tape deck 1 and
mode, no other source equipment is interrogated even
the
CD player 2, the present invention may also be
if, for example, the CD player is playing. This is because
applied
to a variety of source equipment including audi
it is more convenient to the user that the deck is left on
o/visual
equipment as shown in FIG. 5. For example,
till the recording operation thereof has completed 30
the
embodiment
may be modi?ed by replacing the steps
rather than being turned off suddenly while the record
4-9C
by
steps
101-111
in FIG. 5.
ing operation is in progress. The ?owchart may, of
What
is
claimed
is:
course, be modi?ed to give equal priority to both the
l. A sleep timer for audio/visual apparatuses for turn
end of the recording mode of cassette 1 and the end of
35 ing off source equipment of audio/visual signals, com
the CD player.
prising:
If the program recognizes that the sleep key 4 has
sleep timer activating means for outputting a ?rst
been pressed again at step 3B, then the program jumps
signal to activate a timer operation having a ?rst
to the conventional timer mode. That is, the program
proceeds to step 11 to set the 90-minute timer and dis
plays “90” as depicted by (c) shown in FIG. 2. Then, at
step 12, a decision is made based on whether or not ?ve
seconds has passed; if YES, then the program proceeds
to step 13 to monitor the timer output for the expiration
of 90 minutes. When 90 minutes has passed, all the
source equipment are allowed to be in a standby condi
tion (step 14).
mode and a second mode;
timer-mode selecting means responsive to said ?rst
signal, said timer-mode selecting means selecting
said ?rst mode if at least one of the source equip
ment is operating, and selecting said second mode
if the source equipment are not operating;
sleep time setting means which is set to a predeter
mined length of time by said timer-mode selecting
whether or not the sleep key 4 has been pressed again
means when said second mode is selected;
time-up-detecting means for outputting a second sig
nal in the ?rst mode when said at least one of
within ?ve seconds after the 90 min. timer is set; if YES,
the program proceeds to step 16 where the 60 min.
timer is set and “60" is displayed as depicted by (d) in
source equipment completes an operation thereof,
and for outputting a third signal when said prede
termined length of time of said sleep time setting
If ?ve seconds has not passed yet at step 12, the pro
gram proceeds to step 15 to make a decision based on
means expires; and
power-turn-off means for turning off said source
equipment in response to said second signal as well
(step 17); if ?ve seconds has passed, then the program 55
as said third signal.
proceeds to step 18 to monitor the 60 min. timer output
2. A sleep timer for audio/visual apparatuses accord
for expiration of 60 min. setting. When the 60 min. timer
ing to claim 1, said sleep timer activating means is a
times to zero, the program sends the command to the
press key, a ?rst press of said press key causing said
power-turn-off circuit 5 to allow all the source equip
timer-mode selecting means to select said ?rst mode and
~ment to be in a standby condition (step 19).
a second press of said press key within a predetermined
If ?ve seconds has not passed yet at step 17, the pro
time length after said ?rst press causing said timer-mode
gram proceeds to step 20 to make a decision based on
selecting means to select said second mode.
whether or not the sleep key 4 has been pressed again
3. A sleep timer for audio/visual apparatuses accord
within ?ve seconds after the 60 min. timer is set; if
NOT, the program returns to step 17, if YES, the pro 65 ing to claim 1, wherein said source equipment of audio/
visual signals include a CD player, video disk player,
gram proceeds to step 21 to set the 30 min. timer and to
digital audio tape recorder, AM/FM tuner, television
display “30" as depicted by (e) in FIG. 2. Then, a deci
FIG. 2. Then, a decision is made based on whether or
not ?ve seconds has passed after the 60 min. timer is set
sion is made based on whether or not ?ve seconds has
receiver, VTR, and audio magnetic tape deck.
7
5,170,159
equipment for audio/visual apparatuses having a timer,
comprising the steps of:
cording to claim 1, wherein said power-turn-off means
turns off all of said source equipment.
5. A sleep timer for audio/visual apparatuses accord
ing to claim 1, wherein said power-turn-off means turns
off said source equipment so that the source equipment
outputting, when commanded by an operator, a ?rst
signal for activating a timer operation which has a
?rst mode and a second mode;
selecting said ?rst mode if at least one of the source
equipment is operating, and selecting said second
mode if none of the source equipment is operating;
are in a standby condition.
6. A sleep timer for audio/visual apparatuses accord
ing to claim 1, wherein said ?rst mode and said second
mode are selected in a cyclic fashion in response to said
?rst signal, and said second mode has a plurality of
15
predetermined time lengths for said sleep time setting
means and said sleep time setting means is set to said
plurality of predetermined time lengths in order in re
sponse to said ?rst signal.
8
7. A method of setting in a standby condition source
4. A sleep timer for an audio/visual apparatuses ac
setting a predetermined length of time in the timer
when said second mode is selected;
outputting a second signal in the ?rst mode when the
source equipment completes an operation thereof,
and outputting a third signal in the second mode
when said predetermined length of time of said
timer expires; and
setting said source equipment in a standby condition
in response to said second signal as well as said
third signal.
20
25
30
35
45
65
1:
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it
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