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JP2006013779

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
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DESCRIPTION JP2006013779
PROBLEM TO BE SOLVED: To maintain a sound field in a vehicle compartment even when an
operator operates an operation switch over a diaphragm in an operation unit having a
configuration in which operation means such as a touch panel and a diaphragm for sound output
are arranged in an overlapping manner And to realize a configuration that does not give a sense
of discomfort to the passenger. SOLUTION: A plurality of thin film diaphragms (90, 91) for
performing acoustic output are provided in close proximity to a touch panel (8). Even if the
acoustic vibration of any thin film diaphragm is stopped by the finger for touch panel operation,
the acoustic vibration of the other thin film diaphragm compensates the entire acoustic output.
[Selected figure] Figure 3
Vehicle control unit
[0001]
The present invention relates to a vehicle operation unit, and more particularly to a vehicle
operation unit having operation means such as a touch panel.
[0002]
In the field of automobiles, introduction of an operation unit provided with a touch panel on a
display screen has been advanced in order to facilitate the operation of a navigation device, an
audio device, and the like.
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1
The touch panel can be thinned and has an advantage in that the degree of freedom in setting an
area used as a switch is large.
[0003]
On the other hand, a speaker using a transparent diaphragm is being developed in order to
increase the degree of freedom of mounting location (see, for example, Patent Document 1). Since
a transparent diaphragm is used, it also becomes possible to use the front of the display screen
as a speaker. Since the display screen is usually installed near the console where the driver can
easily view, it is also suitable as the position of the speaker, and there is also an advantage that
the display image matches the sound source.
[0004]
Japanese Patent Application Publication No. 2003-40041
[0005]
When the diaphragm for sound output as described above is disposed so as to overlap the touch
panel on the display screen, the operator operates the switch of the touch panel through the
diaphragm.
[0006]
Then, when the operator operates the switch on the touch panel, the acoustic vibration due to the
diaphragm is stopped or weakened by the operator's fingertip, and the sound field in the vehicle
compartment changes, giving a sense of discomfort to the passenger. Will occur.
[0007]
Therefore, the present invention is an operation unit having a configuration in which operation
means such as a touch panel and a diaphragm for sound output are arranged in an overlapping
manner, even if the operator operates the operation switch over the diaphragm, the sound field
in the vehicle compartment The goal is to realize a configuration that does not give a sense of
discomfort to the passenger.
[0008]
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2
The problems described above are solved by the vehicle operation unit of the present invention.
One aspect of the present invention is provided with a thin film diaphragm installed at the front
of a passenger compartment and performing at least acoustic output, and an operation switch
provided in proximity to the thin film diaphragm in an overlapping manner and operated by the
operator touching it. In the vehicle operation unit, a plurality of the thin film diaphragms are
installed in front of the vehicle interior so as to be able to execute the same sound output.
According to such a configuration, even if any of the plurality of thin film diaphragms is stopped
or weakened by the operation of the switch, the sound output from the other thin film
diaphragms causes the sound field in the vehicle compartment to be It is possible to maintain.
[0009]
According to a preferred embodiment of the present invention, the plurality of thin film
diaphragms are preferably provided apart from one another.
Therefore, simultaneous contact with a plurality of thin film diaphragms can be prevented at the
time of operation of the operation switch, and the object of the present invention of maintaining
the sound field can be achieved more reliably.
[0010]
According to a preferred embodiment of the present invention, the plurality of thin film
diaphragms are provided adjacent to each other, and the operation switch is disposed at a
position overlapping one of the plurality of thin film diaphragms. It is preferable to be provided.
With such a configuration, it is possible to minimize simultaneous contact with a plurality of thin
film diaphragms at the time of operation of the operation switch, and it is possible to more
reliably achieve the object of the present invention of maintaining the sound field.
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[0011]
According to a preferred embodiment of the present invention, it is preferable that operation
switches of different functions are provided to be superimposed on each of the plurality of thin
film diaphragms. Also in such an aspect, simultaneous contact with a plurality of thin film
diaphragms at the time of operation of the operation switch can be minimized, and the object of
the present invention of maintaining the sound field can be achieved more reliably.
[0012]
According to a preferred embodiment of the present invention, other than the detection means
for detecting the contact of the operator with the operation switch, and the thin film diaphragm
in which the contact is detected when the contact is detected by the detection means. It is
preferable to further have an acoustic output control means for performing correction to
increase the acoustic output by the thin film diaphragm. According to this configuration, even if
there is a change in the sound field of the thin film diaphragm due to the contact, another thin
film diaphragm can be covered, and the change in the sound field can be suppressed.
[0013]
According to a preferred embodiment of the present invention, detection means for detecting an
operator's contact with the operation switch, and a thin film diaphragm in which the contact is
detected when the contact is detected by the detection means It is preferable to further have an
acoustic output control means for suppressing an acoustic output. Although the frequency of the
acoustic output from the thin film diaphragm brought into contact is changed to cause
disturbance of the acoustic field, such a problem can be avoided with this configuration.
[0014]
As described above, according to the present invention, in the operation unit having a
configuration in which the operation means such as the touch panel and the diaphragm for
sound output are arranged in an overlapping manner, the operator operates the operation switch
over the diaphragm. The sound field in the passenger compartment is maintained, so that it is
possible to prevent the passenger from feeling uncomfortable.
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[0015]
Hereinafter, preferred embodiments of the present invention will be described in detail with
reference to the drawings.
[0016]
FIG. 1 shows the interior of a vehicle, and one aspect of attachment of the operation unit
according to the embodiment of the present invention will be described with reference to this
figure.
In the illustrated example, the navigation unit 1 and the TV / FM / AM tuner (hereinafter referred
to as “tuner”) are provided in the front dashboard.
2) CD / MD player (hereinafter referred to as "player". 3) is housed, while the operation unit body
5 is mounted on the front dashboard. Of course, the operation unit body 5 may also be housed in
the front dashboard. The point is that at least the vehicle should be installed in front of the
vehicle so that the passenger can easily operate it.
[0017]
FIG. 2 is a cross-sectional view showing a structural example of the operation unit main body 5 in
the present embodiment. The operation unit main body 5 includes a display unit that displays an
image based on information from the navigation unit 1 or the like, and implements the function
of the touch panel on the display unit. In the figure, reference numeral 7 denotes a liquid crystal
display (LCD) as a display unit, and reference numeral 8 denotes a touch panel as an example of
operation means.
[0018]
The LCD is only a typical example of the display unit, and in addition, the display unit may be
configured of a PDP (Plasma Display Panel), an EL (Electro Luminescence) panel, an FED (Field
Emission Display) panel, or the like.
[0019]
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5
In addition, there are resistive film type (pressure-sensitive type), ultrasonic type, photoelectric
type, electrostatic capacity type, etc. as a touch panel type, but in the present embodiment, the
touch panel 8 has a relatively inexpensive and simple configuration. The resistive film method
that can be realized is adopted.
Therefore, the touch panel 8 has two transparent sheets 8a and 8b on which a resistive film is
formed, and the two sheets 8a and 8b are arranged such that the surfaces on which the resistive
film is formed face each other. The other side of the sheet 8 b is bonded to a glass substrate 8 a
for protecting the LCD 7. Here, an insulating spacer is interposed between the two sheets 8a and
8b, and when not pressed by a fingertip or the like, both are not in contact with each other, and
when pressed, both are in contact with each other.
[0020]
Furthermore, in the operation unit main body 5, two upper and lower thin film diaphragms 90
and 91 are provided in proximity to the touch panel 8 so as to be overlapped. The thin film
diaphragms 90 and 91 have the same structure, and the first thin film diaphragm 90 will be
described typically. For example, transparent conductive films 9a and 9c such as ITO are formed
on both sides of the polymeric piezoelectric film 9b. A film of deposited bimorph structure is
used. It is known that when a voltage is applied to a film of such bimorph structure, the film is
displaced. Using this, it is possible to generate a corresponding vibration when an AC current is
applied.
[0021]
Reference numerals 10a and 10b denote electrode plates bonded to the surfaces of the second
thin film diaphragm 91, to which electric signals are supplied. A similar electrode plate is
adhered to the first thin film diaphragm 90, but the illustration thereof is omitted. The first and
second thin film diaphragms 90 and 91 configured as described above each function as a
speaker. Therefore, these thin film diaphragms are hereinafter referred to as "film speakers". If
the film speakers 90 and 91 are provided on the foremost surface of the operation unit main
body 5 as shown in FIG. It is advantageous in being able to hear clear sound. In addition, since
the displayed image and the sound source coincide with each other, an advantage that
naturalness is improved also occurs.
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[0022]
The reproducible frequencies of the first and second film speakers 90 and 91 in this embodiment
are assumed to be 20 to 20000 Hz, which is equivalent to the audible range. However, from the
viewpoint of providing higher-quality sound, a normal speaker (woofer) for, for example, mid-low
range sound may be provided in a place such as a rear dashboard or a door trim separately from
the film speakers 90 and 91. .
[0023]
As described above, in the present embodiment, two film speakers are arranged in the vertical
direction of the image display surface, but the film speakers according to the present invention
are limited to a specific number and a specific arrangement mode. Absent. For example, three
sheets may be arranged in the left and right direction of the image display surface.
[0024]
The LCD 7, the touch panel 8, and the film speakers 90 and 91 described above are integrally
supported by the case 6. The positional relationship between the touch panel 8 and the film
speakers 90 and 91 may be opposite to that shown in the drawing, but in the present
embodiment, as described above, the film speaker 90 and the film speaker 90 are provided in
order to provide clearer sound. 91 is disposed on the front of the operation unit body 5
Therefore, the operator operates the touch panel 8 through the film speaker 90 or 91.
[0025]
Further, in the present embodiment, at least one first proximity sensor 11 a in the vicinity of the
upper end of the first film speaker 90 and at least one second proximity sensor 11 b in the
vicinity of the lower end of the second film speaker 91 Case 6 holds. The first and second
proximity sensors 11a and 11b are, for example, ultrasonic sensors, and are configured to detect
arrival time or amplitude of a reflected wave of the transmitted ultrasonic waves. This is for
detecting a state where the operator's fingertip just touches the first film speaker 90 or the
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second film speaker 91. In this embodiment, the first film is detected when this state is detected.
It is assumed that the contact to the speaker 90 or the second film speaker 91 is detected. Thus,
the touch panel 8 can be detected quickly and easily.
[0026]
The means for quickly detecting that the touch panel 8 is operated is not limited to this. For
example, microphones as collecting means for collecting the output sound from the first and
second film speakers 90 and 91 are placed in the vicinity of the first and second film speakers 90
and 91 respectively, and collected by these microphones. The monitor sound may be monitored
to detect that there has been an operation on the touch panel when there is a change such as a
sharp decrease in volume.
[0027]
Alternatively, the left and right ends of the first and second film speakers 90 and 91 respectively
have a pair of light projectors and light receivers, emit visible light from the light projectors to
the light receivers, and the operator's finger as an obstacle is The contact to the film speaker, that
is, the operation of the touch panel may be detected by blocking the visible light.
[0028]
FIG. 3 is a diagram showing an example of the circuit configuration of the entire operation unit in
the present embodiment.
Reference numeral 20 denotes a control unit, for example, processing such as delivery of image
data from the navigation unit 1 to the LCD 7, coordinate detection of a touch position on the
touch panel 8, control of sound output from the first and second film speakers 90 and 91, etc.
Comprehensively. Reference numerals 40a and 40b denote first and second D / A converters for
converting the supplied digital audio data into analog signals, and reference numerals 41a and
41b denote first and second power amplifiers, respectively. With this configuration, the same
sound output can be performed from the first and second film speakers 90 and 91, and each
sound output can be controlled independently. The navigation unit 1, the tuner 2, and the player
3 are also connected to the woofer 43 via the third power amplifier 42. Further, the control unit
20 is connected with an air conditioning actuator 4 for operating the air conditioner, and an
obstacle detection sensor 50 is also connected as an option. The obstacle detection sensor 50 is
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8
formed of, for example, an ultrasonic sensor.
[0029]
The control unit 20 has the following configuration, including a CPU 21 that controls the
operation unit body 5, a RAM 22 that functions as a main storage device, and a ROM 23 that
stores various programs and data.
[0030]
The LCD controller 24 controls the supply of image data (eg, RGB color signals) to the LCD 7.
The touch panel controller 25 controls driving of the touch panel 8 and issues a touch detection
event as an interrupt request to the CPU 21 in response to detection of contact between the
sheets 8 a and 8 b in the touch panel 8. The proximity sensor controller 26 controls, for example,
the transmission operation of the ultrasonic wave, and based on the transmission time of the
ultrasonic wave and the arrival time of the reflected wave obtained from the first and second
proximity sensors 11a and 11b, the finger of the operator Processing for detecting the proximity
of the touch panel to the touch panel, and when the proximity is detected, the proximity sensor
(that is, either the first proximity sensor 11a or the second proximity sensor 11b) that detects the
proximity is A proximity detection event including information to be specified is issued to the
CPU 21 as an interrupt request. 27a and 27b are interfaces (I / F) for connecting the first and
second D / A converters 40a and 40b, and 28 and 29 are for connecting the air conditioning
actuator 4 and the obstacle detection sensor 50, respectively. Interface. Reference numeral 30
denotes an interface for communicating control data including image data and audio data and
operation information of the touch panel 8 with the navigation unit 1, the tuner 2 or the player 3.
[0031]
The ROM 23 stores an operation unit control program 231 and a danger monitoring program
232 as illustrated. The operation unit control program 231 controls the display of the LCD 7,
detects the coordinates of the touch position on the touch panel 8, controls the operation of the
air conditioning actuator 4, controls the sound output to the first and second film speakers 90
and 91, etc. To realize the control process of Further, the danger monitoring program 233
monitors danger based on the detection result of the obstacle detection sensor 50, and realizes,
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for example, issuing a danger warning event as an interrupt request when the danger is detected.
These programs are loaded into the RAM 22 at power-on and executed by the CPU 21.
[0032]
FIG. 4 is a view showing an example of the image display surface of the operation unit main body
5 in the present embodiment. In the figure, reference numerals 401 to 404 denote hard switches
for selecting functions, and when any one of these switches is pressed, an image based on the
function corresponding to that is displayed on the LCD 7. In the example of the figure, the
navigation function is selected by pressing the "NAVI" switch 401, and the image supplied from
the navigation unit 1 is displayed accordingly. Here, 411 to 413 are operation switches of the
touch panel 8 displayed by the LCD 7.
[0033]
Conventionally, when the operator operates the operation switch of the touch panel through the
film speaker, the acoustic vibration of the film speaker is stopped or weakened by the operator's
fingertip, and the sound field in the vehicle compartment is changed, and the passenger rides As
mentioned above, there was the problem of giving the person a sense of discomfort.
[0034]
On the other hand, in the present embodiment, as shown in the figure, since the two film
speakers 90 and 91 are disposed vertically adjacent to each other, the acoustic switches of the
film speaker 90 are operated because the operation switches 411 to 413 are operated. The
sound vibration of the other film speaker 91 is not affected even if the signal is stopped or
weakened.
For this reason, it is possible to maintain the sound field in the vehicle interior without extremely
reducing the sound output by the film speaker.
[0035]
However, there is a possibility that the vicinity of the boundary position between the first film
speaker 90 and the second film speaker 91 is touched, whereby the acoustic vibration of both
film speakers can be attenuated simultaneously.
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[0036]
However, this problem is also addressed in this embodiment.
That is, in the example of the figure, the operation switches 411 to 413 are provided only on the
side where the first film speakers 90 overlap, and the operation switches are not provided on the
side where the second film speakers 91 overlap. . As described above, the operation switches 411
to 413 are formed only in a region where any one film speaker (film speaker 90) overlaps, so
both film speakers 90 and 91 are operated when operating the operation switches 411 to 413.
At the same time, the object of the present invention to maintain the sound field can be achieved
more reliably.
[0037]
Furthermore, it is more preferable that the operation switch be formed at a position as far as
possible from the boundary position between the first film speaker 90 and the second film
speaker 91.
[0038]
In addition, it does not prohibit that an operation switch is formed in the area | region where one
film speaker (for example, 2nd film speaker 91) overlaps, but it overlaps with the other film
speaker (for example, 1st film speaker 90) It may be possible to form an operation switch of a
function different from that of the operation switch formed in the area.
For example, as shown in FIG. 5, the operation switches 411 to 413 formed in the overlapping
area of the first film speaker 90 relate to the navigation function, while the operating switches
411 to 413 are formed in the overlapping area of the second film speaker 91 The operating
switches 415 and 416 relate to the temperature setting function of the air conditioner (air
conditioner). With such an arrangement of the operation switch, there is little concern that a
plurality of film speakers will be touched at the same time when operating the operation switch,
and the object of the present invention of maintaining the sound field can be achieved more
reliably. .
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[0039]
Further, the purpose of preventing simultaneous contact with a plurality of film speakers at the
time of operation of the operation switch is, as shown in FIG. 7, the first film speaker 91 and the
second film speaker 92 simultaneously with a fingertip. It can also be achieved by providing
them at a reasonable distance d (e.g. 2 cm) which can not be touched.
[0040]
Hereinafter, processing realized by execution of the operation unit control program 231 will be
described.
[0041]
FIG. 7 is a flowchart showing main processing by the operation unit control program 231.
First, in step S1, the reception of control data from the selected device among the navigation unit
1, the tuner 2 and the player 3 is awaited.
The control data from the navigation unit 1 includes, for example, image data to be displayed and
information on the position where the touch panel switch is provided (switch position
information). The updated control data will be sent from the navigation unit 1 every moment
while the vehicle is traveling, as well as when the operation is performed. Also, control data from
the tuner 2 or the player 3 includes acoustic data for output.
[0042]
When the control data is received, the image data included in the control data is passed to the
LCD controller 24 and displayed on the LCD 7 in step S2. Alternatively, sound data included in
the control data is output to the I / F 27 and output to the film speaker 9 via the D / A converter
40 and the first power amplifier 41. Further, for the control data from the navigation unit 1, in
step S3, the switch position information contained in the received control data is stored in the
RAM 22, and thereafter, the process returns to step S1 to wait for the next control data.
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[0043]
During such main processing, the CPU 21 performs a touch detection event issued from the
touch panel controller 24 as described above, a proximity detection event issued from the
proximity sensor controller 26, or a danger warning issued during execution of the danger
monitoring program. When an event is received, it is ready to execute interrupt processing
according to the event.
[0044]
For example, it is preferable to perform processing as shown in the flowchart of FIG. 8 as
interrupt processing when a proximity detection event is received.
As described above, the proximity detection event in the present embodiment is issued when the
proximity sensor controller 26 detects proximity of the operator's finger to the touch panel, and
the proximity sensor (ie, It includes information for specifying either the first proximity sensor
11a or the second proximity sensor 11b. Then, it is considered that the contact to the film
speaker and the touch to the touch panel 8 or its operation switch are detected by receiving this
event.
[0045]
First, in step S11, the touched film speaker is specified. For example, this may be specified using
information specifying the proximity sensor (that is, either the first proximity sensor 11a or the
second proximity sensor 11b) that has detected the proximity included in the received proximity
detection event. it can. Specifically, when the proximity sensor that has detected the proximity is
the first proximity sensor 11a, it is determined that the film speaker touched is the first film
speaker 90, and the proximity sensor that has detected the proximity is In the case of the second
proximity sensor 11 b, the film speaker touched is determined to be the second film speaker 91.
[0046]
Next, in step S12, the sound output of the film speaker touched in step S11 is stopped for a
certain period of time. Such a problem can be avoided by the process of step S12, although the
frequency of the sound output from the film speaker touched is changed to cause the disturbance
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of the sound field.
[0047]
Subsequently, in step S13, the sound output of the film speakers other than the touched film
speaker specified in step S11 is increased for a predetermined time. This makes it possible to
compensate for the overall volume even when the film speaker has been stopped by the touch of
the film speaker. Thereafter, the process exits the interrupt process and returns to the main
process.
[0048]
In the above example, although both the processes of step S12 and step S13 are performed, only
either process of step S12 or step S13 may be performed.
[0049]
Although the above control processing has been described as interrupt processing due to a
proximity detection event, such control processing may be interrupt processing due to a touch
detection event issued from the touch panel controller 24.
In this case, as shown in FIG. 9, first, coordinate detection processing of the touch position is
performed as step S10 (Since the coordinate detection processing itself in the resistive film type
touch panel is a known technique, the detailed description thereof is omitted. In step S11, the
film speaker touched is specified based on the detected coordinate value.
[0050]
It is a figure which shows an example of the attachment state of the operation unit main body
which concerns on embodiment of this invention. It is sectional drawing which shows the
structural example of the operation unit main body in embodiment of this invention. It is a figure
showing an example of the circuit composition of the whole operation unit in the embodiment of
the present invention. FIGS. 6A and 6B are diagrams showing an arrangement example of
operation switches of a film speaker and a touch panel according to an embodiment of the
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present invention. FIGS. It is a flowchart which shows the main process by the operation part
control program in embodiment of this invention. It is a flowchart which shows the interruption
process when the proximity detection event by the operation part control program in
embodiment of this invention is received. FIG. 8 is a flowchart showing an interrupt process
when a touch detection event is received as an example of an alternative process of the interrupt
process when the proximity detection event of FIG. 7 is received.
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