close

Вход

Забыли?

вход по аккаунту

JP2004334740

код для вставкиСкачать
Patent Translate
Powered by EPO and Google
Notice
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
financial decisions, should not be based on machine-translation output.
DESCRIPTION JP2004334740
To provide a coordinate input device capable of using a tablet as a speaker. A detection sheet (3)
and a detection sheet (4) are superimposed on each other, and a drive section (7) is provided at
an end of the detection sheet (4) on the X1 side. The detection sheet 3 is formed to be longer
than both ends of the detection sheet 4 in the X direction, and the protruding portions of the
detection sheet 3 are respectively fixed to the supports 6a and 6b. The dimension S1 of the gap
12a of the portion not fixed to the support 6a of the detection sheet 3 is formed longer than the
dimension S2 of the gap 12b of the portion not fixed to the support 6b. [Selected figure] Figure 2
Coordinate input device
[0001] The present invention relates to a coordinate input device in which the surface of an
operation surface functions as a speaker, and more particularly to a coordinate input device
capable of outputting a high sound pressure. 2. Description of the Related Art Some portable
information terminals are provided with a display panel, and perform input operations while
touching the screen of the display panel with a finger or a pen. In this type of terminal,
coordinate detection means formed in a transparent color is superimposed on the front surface
of the display panel and mounted in a housing larger than the display screen. In addition, other
operation units and the like are provided in portions other than the display screen of the housing.
In some of the information portable terminals, a speaker is built in a housing and a sound is
emitted based on a screen pattern. Alternatively, in the case where only the sound source is
mounted in the housing, there are some that connect earphones or headphones to hear the
sound. SUMMARY OF THE INVENTION However, in the case of mounting a speaker, the portable
information terminal on which the above-described conventional coordinate input device is
mounted requires an installation space for the speaker, which makes the terminal compact.
11-05-2019
1
Becomes difficult to Moreover, in the terminal in which only a sound source is mounted, it is
necessary to wear an earphone, and handling is inconvenient. The present invention is intended
to solve the above-mentioned conventional problems, and it is an object of the present invention
to provide a coordinate input device capable of mounting a speaker without increasing the size of
a terminal, in which various operations can be performed on the screen. . According to the
present invention, a coordinate detection means, a support portion for supporting a substrate of
the coordinate detection means, and a drive means for vibrating the coordinate detection means
are provided. A part of the means is supported by the support and sound pressure is emitted
from the coordinate detection means when the drive means is driven. In the present invention,
since the coordinate detection means can be used also as the diaphragm of the speaker, the case
is not enlarged. Note that the function is not limited to the speaker, and may be applied as one
that operates the coordinate detection means to give an operation feeling when the operator
performs an input operation. For example, in the coordinate detection means, a pair of detection
sheets for detecting the operation position in the X direction and the Y direction are provided to
overlap each other, and the one detection sheet protrudes from the opposite end of the other
detection sheet Each of the protruding detection sheets is supported by the support provided
opposite to the base.
As described above, since a part of the coordinate detection means can be shared with a part of
the speaker, the number of parts can be reduced, and the manufacturing cost can be suppressed.
For example, preferably, the drive means is provided at a position offset to one of the supports of
the other detection sheet. Further, the gaps from the portion fixed to the support of the one
detection sheet to the overlapping portion with the other detection sheet are set to different
dimensions, and the dimension of the one gap is formed long Therefore, it is preferable to set so
as to operate largely, and to set so as to operate small by forming the other gap short. Therefore,
the output of the sound pressure does not decrease even when the drive means is provided at a
position biased with respect to the coordinate detection means. Further, the coordinate detection
means may be formed in a transparent color, and a display member may be provided so as to
overlap on the opposite side of the operation surface of the coordinate detection means. This
enables various input operations while touching the image displayed on the display member. In
addition, it is possible to provide a thin display device equipped with a sound output function
similar to that of the speaker. FIG. 1 is a plan view of an example of the coordinate input device
according to the present invention as viewed from the operation surface side, FIG. 2 is a crosssectional view taken along line 2-2 of FIG. 1, FIG. FIG. 6A is a schematic view showing the
operation of the diaphragm at the time of sound generation, FIG. 7A is an operation view in a
conventional mode, and FIG. 7B is an operation view in the present embodiment. The coordinate
input device 1 according to the present embodiment can be mounted on the front of a display
panel such as a PDA (Personal Digital Assistant). Therefore, it is possible to input while operating
the screen displayed on the display panel with a finger or a pen or the like, and sound is emitted
from the surface of the display panel. The coordinate input device 1 shown in FIG. 1 has a
11-05-2019
2
coordinate detection means 2 formed in a rectangular shape. The coordinate detection means 2
is a resistive tablet, and as shown in FIG. 2, the detection sheet 3 for detecting the position in the
X direction is provided on the Z1 side which is the front side, and the Z2 side of the detection
sheet 3 is provided. There is provided another detection sheet 4 for detecting the position in the
Y-axis direction. However, the position in the Y direction may be detected by the detection sheet
3, and the position in the X direction may be detected by the detection sheet 4. The detection
sheet 3 is formed of a material capable of bending and deformation, and specifically, it can be
selected from a synthetic resin such as polyethylene terephthalate formed in a film shape, or a
glass having a thin thickness and the like.
The detection sheet 4 can be selected from transparent glass or transparent synthetic resin. In
the detection sheets 3 and 4, conductive layers 3a and 4a are formed on one side on the side
facing each other. The conductive layers 3a and 4a are formed of, for example, a transparent
electrode such as ITO (indium-tin oxide). Although not shown, a plurality of micro projections
formed of non-conductive members are formed on the opposite surface of either the detection
sheet 3 or the detection sheet 4 so that the detection sheet 3 and the detection sheet 4 It is set so
as to maintain a minute gap between the conductive layers 3a and 4a when not in operation,
when. As shown in FIG. 1, the dimensions of the detection sheet 3 in the X direction and the Y
direction are longer than the dimensions of the detection sheet 4 in the X direction and the Y
direction, and the detection sheet 3 It protrudes from each of the four sides of the sheet 4. The
portions of the detection sheet 3 protruding in the X1 and X2 directions from the detection sheet
4 are fixed to supports 6 a and 6 b provided at both ends on the base 5 via an adhesive or the
like. In the present embodiment, the base 5 is formed of a transparent synthetic resin such as
PET or acrylic. The detection sheet 4 is provided with a drive unit 7 which functions as a drive
unit. The drive unit 7 is provided at a position deviated in the X1 direction with respect to the
detection sheet 4. Further, the drive unit 7 is, for example, a piezoelectric element, and the
piezoelectric element can be deformed in the Z1-Z2 direction by applying a predetermined
voltage to the piezoelectric element. The drive means may be a magnetic circuit in which a coil is
provided on the detection sheet 4 side, a magnet or the like is provided on the base 5 side to
form a porcelain circuit, and the detection sheet 4 is driven in the Z1-Z2 direction. Good. The
coordinate detection means 2 is schematically shown in FIG. As described above, both of the
detection sheets 3 and 4 can be regarded as one resistor. Therefore, assuming that pressing
operation is performed at point P shown in FIG. 3 when a predetermined voltage is applied to
both ends of detection sheet 3, the same resistance is obtained at all positions parallel to point P
in the Y direction. A value is obtained. When a predetermined voltage is applied to both ends of
the detection sheet 4, the same resistance value is obtained at all positions parallel to the point P
in the X direction. As shown in FIG. 3, the detection sheet 3 only, the end on the X1 side is 5 volts
(V), the end on the X2 side is 0 V, and the detection sheet 4 only is 5 V A control unit (not
shown) controls the detection sheets 3 and 4 to be energized alternately so that the Y2 side
becomes 0V.
11-05-2019
3
When point P is pressed, detection sheet 3 conductive layer 3a and conductive layer 4a of
detection sheet 4 contact at point P, and when detection sheet 3 is energized at this time,
detection sheet 4 is interposed. Voltage Vx is detected. When the detection sheet 3 is
deenergized and the detection sheet 4 is energized, the voltage Vy is detected via the detection
sheet 3. In the control unit, coordinate data based on the voltage values Vx and Vy are stored in
advance in the storage unit, and the operation position can be acquired by detecting the voltage
values Vx and Vy. The coordinate detection means 2 is not limited to the resistive tablet, and may
be a capacitive tablet. As shown in FIGS. 1 and 2, support portions 8 and 9 are provided on the
base 5. The support portions 8 and 9 are respectively elongated in the X direction, and are fixed
to respective ends on the Y1 side and the Y2 side with respect to the base 5. However, the
support portion as described above may be formed on one surface of the base 5. In the support
portions 8 and 9, the fixing portion 8a formed of a synthetic resin is fixed on the base 5, and an
elastic member 8b such as rubber is formed on the surface of the fixing portion 8a on the Z1
side. Thus, when the elastic member 8b is provided in the part which the detection sheet 4
contacts, the contact sound at the time of the detection sheet 4 contacting can be reduced. The
support portion 9 is also configured by a fixing portion and an elastic member. As shown in FIG.
2, the height dimension H of the support portions 8 and 9 is formed to such an extent that a
minute gap 11 is formed with the surface on the Z2 side of the detection sheet 4. That is, when
the drive unit 7 is driven and the detection sheets 3 and 4 are driven, the gap 11 causes the
detection sheets 3 and 4 to be deformed excessively and detect the conductive layer 3 a of the
detection sheet 3. It is set to such an extent that the conductive layer 4a of the sheet 4 does not
contact carelessly. In the present embodiment, as shown in FIG. 2, the dimension of the gap 12a
from the overlapping portion of the detection sheet 3 and the detection sheet 4 on the X1 side to
the fixing portion of the detection sheet 3 of the support 6a is S1. It is set to. In the opposite X2
side, the dimension of the gap 12b from the overlapping portion to the fixing portion of the
detection sheet 3 of the support 6b is set to S2 which is smaller than the dimension S1. In the
coordinate input device 1 formed as described above, when the drive unit 7 is energized and
driven, the vibration based on the driving force is transmitted to the detection sheet 4 and the
detection sheet 4 is further detected. The sheet 3 is vibrated in the Z1-Z2 direction together with
the sheet 3.
Thus, the detection sheets 3 and 4 are caused to function as a diaphragm, and sound pressure is
emitted from the detection sheets 3 and 4. In addition, when the drive unit 7 is provided so as to
be biased to the end on the X1 side of the detection sheet 4, when the gap 12a of the detection
sheet 3 is deformed so as to protrude to the Z1 side, the gap on the X2 side In 12b, it is
deformed so as to protrude in the Z2 direction. FIG. 4A shows a state in which the gap
dimensions S 1 and S 2 are set to be the same, but when the gaps 12 a and 12 b are set to the
same dimensions in this manner, the drive is performed. When the unit 7 is driven, the sound
11-05-2019
4
pressure of the phase indicated by the code a1 is emitted toward the Z1 direction on the X1 side
of the detection sheet 3, and the sound pressure of the phase opposite to that described above by
the code a2 on the X2 side. Is emitted in the Z1 direction. As described above, sound pressures
with the same amplitude but in opposite phases are generated on the X1 side and the X2 side of
the detection sheet 3, so that the sound pressures do not output because they work in a direction
in which the sound pressures cancel each other. The sound output is weakened. Therefore, as
shown in FIG. 4B, by setting the dimension S1 of the gap 12a on the X1 side to be longer than
the dimension S2 of the gap 12b on the X2 side, the sound pressure emitted on the X1 side is
sign b1. The sound pressure generated on the X2 side is opposite in phase and smaller in
amplitude than the sound pressure b1, as indicated by the code S2. Therefore, the sound
pressure is not canceled on the X1 side and the X2 side, and the detection sheets 3 and 4 can
emit a large sound pressure. In the embodiment described above, the dimensions of the gaps 12
a and 12 b are different, but the present invention is not limited to this. For example, the
dimensions of the gaps on both sides are set to be the same. The rigidity of both sides of 3 may
be changed. Alternatively, the detection sheet 3 may be supported by the support portion 6a (or
6b) so as to pivot around one end. In the electronic device on which the coordinate input device
1 described above is mounted, the display panel 20 formed of liquid crystal, organic EL
(electroluminescence) or the like is installed on the back side of the coordinate input device 1.
The display panel 20 can display a still image or a moving image, and can input various
operations based on the image. In the present embodiment, all of the detection sheets 3 and 4,
the conductive layers 3 a and 4 a and the base 5 are formed transparent, so that even if the
display panel 20 is provided on the back side of the base 5, the display panel 20 is The image
displayed in is visible from the operation surface 1A side.
The display panel 20 may be installed between the detection sheet 4 and the base 5. Therefore,
in the electronic device on which the coordinate input device 1 and the display panel 20 are
mounted, various operations can be input according to the screen output to the display panel 20,
and sound can be output from the surface of the display panel 20. It will be. Therefore, when the
electronic device is viewed in plan from the front, the outer dimensions can be made closer to the
size of the display panel 20, and the device can be miniaturized and thinned. In addition, since
the detection sheets 3 and 4 can be used as speakers, the number of parts can be reduced and
the manufacturing cost can be reduced. Further, in the coordinate input device 1 described
above, the function as a so-called speaker has been described, but the present invention is not
limited to this and can be used as a feedback function. The feedback function is, for example, in
an electronic device such as a PDA, the detection sheet 3 when the cursor reaches the position of
the menu display on the screen, when the menu display border is crossed, or when the icon
display is reached. And 4 so that the operator's hand or finger can feel some force. Therefore, the
operator can recognize that the cursor has reached each of the positions by hand feeling without
relying only on vision. 5 and 6 show a modification of the coordinate input device 1. In this
coordinate input device 30, the coordinate detection means 2 is provided on the base 5, and each
11-05-2019
5
edge of the four sides of the coordinate detection means 2 corresponds to each edge of the four
sides of the base 5 and the elastic supporting members 31a and 31b. , 31c and 31d. The elastic
support members 31a to 31d are formed in an arc shape of synthetic resin or the like, but the
present invention is not limited thereto. In the present embodiment, both ends of the elastic
support member 31a are connected to the ends of the elastic support members 31b and 31d,
and both ends of the elastic support member 31c are the other ends of the elastic support
members 31b and 31d. The space between the coordinate detection means 2 and the base 5 is
sealed by the elastic support members 31a to 31d. By forming the space sealed in this way, when
the drive unit 7 is vibrated, a sound pressure directed to the Z1 side is emitted on the X1 side of
the coordinate detection means 2, and directed to the Z2 side on the X2 side. Sound pressure is
emitted. At this time, since the sound pressure emitted toward the Z2 side is blocked by the
elastic support members 31a to 31d and prevented from leaking out to the Z1 side, the sound
pressure output toward the Z1 side on the X1 side Output can not be reduced.
Further, on the base 5, support portions 32 a, 32 b, 32 c, 32 d are provided in the form of a
frame along the peripheral edge portion. Each of the support portions 32 a to 32 d is set to a size
such that the counter electrode of the coordinate detection means 2 does not contact carelessly,
as described in the coordinate input device 1. According to the present invention described
above, the detection sheet of the coordinate input means can be used also as the diaphragm of
the speaker. In addition, even if the drive unit is provided to be biased to one side, the output of
the sound pressure is not reduced. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view
of the coordinate input device according to the present invention viewed from the operation
surface side, FIG. 2 is a cross-sectional view taken along line 2-2 of FIG. The circuit diagram
showing the detection means in the detection means, [FIG. 4] is an operation explanatory view
when sound pressure is output, (A) before measures to prevent output decrease, (B) shows
output decrease After taking measures to prevent this, Fig. 5 is a plan view showing a modified
example of the coordinate input device of the present invention, Fig. 6 is a sectional view taken
along line 6-6 in Fig. 5, [explanation of symbols] 1 coordinate input device Reference Signs List 2
coordinate detection means 3, 4 detection sheet 5 base 6a, 6b support portion 7 drive portion
(drive means) 8, 9 support portion 12a, 12b gap 20 display panel (display member)
11-05-2019
6
1/--страниц
Пожаловаться на содержимое документа