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JPH0560075

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DESCRIPTION JPH0560075
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
control device for an in-vehicle device, and more particularly to a control device for an in-vehicle
device which performs appropriate system control of the in-vehicle device based on the seating
position of an occupant
[0002]
2. Description of the Related Art In a car audio system, for example, audio output units such as
front speakers and rear speakers are fixedly installed at specific positions in a car. Therefore,
when the number of occupants on board changes or the seating position changes, an adjustment
device is provided to appropriately adjust the output of each speaker to generate an appropriate
sound field. Such adjustment is normally performed, as shown in FIG. 4, every time there is a
change in the seating position, the driver changes the positioning switch 41 among various
control keys installed in the DSP (Digital Signal Processor) unit 40 of the audio system. Or, as
shown in FIG. 5, this operation is performed by operating the front and rear fader knobs 51 and
the left and right balance knobs 52 of the head unit 50.
[0004]
As described above, in the control device of a conventional car audio system or other in-vehicle
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1
apparatus, the driver changes the positioning switching switch, the left / right balance, and the
like each time there is a change in the seating position of the occupant. The front and rear fader
knobs etc are adjusted. Therefore, every time there is a change in the seating position of the
occupant, the driver has to make adjustments, which not only makes the operation complicated
but also makes it impossible to concentrate on driving, which causes problems in terms of safety
as well.
[0005]
Therefore, an object of the present invention is to provide a control apparatus of an on-vehicle
apparatus capable of automatically controlling to an appropriate apparatus operation mode
corresponding to a passenger seating position.
[0006]
SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a control device
of an in-vehicle apparatus according to the present invention detects a position of a seat where
an occupant is seated and outputs it as seating position information. And control means for
appropriately setting and controlling an operation mode of a predetermined on-vehicle apparatus
based on seating position information from the sensor means.
[0007]
In this invention, the seating position is detected by the sensor, and based on the detected seating
position information, for example, the positioning switching of the DSP unit and the adjustment
of the fader volume, balance volume, etc. are automatically performed, and the on-vehicle device
is properly adjusted. By controlling the driver, the driver is not bothered, and the safety and
usability are improved.
[0008]
Next, the present invention will be described in detail with reference to the drawings.
FIG. 1 is a simplified block diagram showing an embodiment of a control device for a vehiclemounted device according to the present invention, which is an example in which sound field
generation by an audio device is appropriately performed.
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2
Seats in the car body 1, front left seat 11FL, front right seat 11FR, rear left seat 11RL,
corresponding position of rear right seat 11RR, infrared sensor 12FL provided on the ceiling (or
door part) of each seat, etc. Sensors such as 12FR, 12RL, 12RR, etc. are installed to detect the
position of the occupant (seat) in each seat.
Detection information from each sensor is supplied to the DSP unit 20, and the seating position
correspondence display unit 22 is turned on, and an appropriate sound field is generated at the
seating position. This sound field generation is performed by the left front speaker 13FL installed
at the front door, the right front speaker 13FR, the left rear speaker 13RL installed at the rear,
and the right rear speaker 13RR.
[0009]
FIG. 1 (B) shows a state where four occupants are seated in each of the front and rear seats, the
detection information from each sensor is supplied to the DSP unit 20, and the display unit
corresponds to each seat. While all the display parts of the indicator 22 divided into four are lit,
the positioning change switch 21 is controlled to automatically generate a sound field of the
optimum mode. Similarly, FIG. 6B shows that no occupant is in the rear seat and the occupant is
seated in the front seats 11FL and 11FR, and only the front seat position corresponding portion
of the display 22 of the DSP unit 20 is shown. It lights up and generates the optimal mode sound
field corresponding to the front seat seating. The sound field generation mode can also be set
arbitrarily by operating the position switch 21.
[0010]
Referring to FIG. 2, the seating position information from the infrared sensors 12FL, 12FR, 12RL,
12RR, etc. is sent to a microcomputer (μ-com) 22 built in the DSP unit 20. The microcomputer
22 sets and controls the position switch 21 function so as to generate a sound field of the mode
optimum for the seating position based on the seating position information. Here, control is
periodically performed in comparison with the previous data taken in so as not to cause a
malfunction when the occupant moves back and forth.
[0011]
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3
FIG. 3 shows an example of a system for controlling faders and balance volumes 32 and 33
mounted on the head unit 30 other than the DSP unit unlike FIG. 2, and the microcomputer 31
receiving the seating position information from the infrared sensor The fader volume 32 and the
balance volume 33 are appropriately controlled. For example, in the case of FIG. 1A, since the
sounds generated from the rear speakers 13RF and 13RR are close to the ears of the occupant
sitting on the rear seats 11RL and 11RR, the fader volume 32 is moved to the front side. Also, in
the case of FIG. 1B, the fader volume 32 is moved to the rear side to balance the front and rear
volume using the infrared sensor output in addition to the above embodiment. It is also possible
to control ergonomically appropriate control by controlling the air outlet and temperature
switching of the car air conditioner.
[0012]
As described above, the control device of the in-vehicle apparatus according to the present
invention detects the seating position by the sensor and appropriately controls the in-vehicle
apparatus based on the detected seating position information. For example, the positioning of the
DSP unit, the fader volume, the balance volume, etc. can be automatically switched, the driver is
not bothered, and the usability is remarkably improved. Also, the above effects can be easily
obtained by adding a sensor to the conventional one and improving the software of the built-in
microcomputer. This invention can also be used for automatic control (crossover frequency and
level) of channel dividers used in multi-amplifier systems etc. In addition, optimal control of auto
car air conditioners becomes possible.
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