U.S. patent application number 15/363922 was filed with the patent office on 2017-03-23 for electronic device and method for controlling the electronic device.
This patent application is currently assigned to Japan Display Inc.. The applicant listed for this patent is Japan Display Inc.. Invention is credited to Kohei AZUMI, Makoto HAYASHI, Kozo IKENO, Yoshitoshi KIDA, Hiroshi MIZUHASHI, Hirofumi NAKAGAWA, Jouji YAMADA, Michio YAMAMOTO.
Application Number | 20170083158 15/363922 |
Document ID | / |
Family ID | 51620300 |
Filed Date | 2017-03-23 |
United States Patent
Application |
20170083158 |
Kind Code |
A1 |
HAYASHI; Makoto ; et
al. |
March 23, 2017 |
ELECTRONIC DEVICE AND METHOD FOR CONTROLLING THE ELECTRONIC
DEVICE
Abstract
A sensor-integrated display panel including an operation surface
for performing an input operation and an image display surface
which are formed integrally with a sensor as one piece. A data
transfer device supplies the sensor-integrated display panel with a
drive signal for driving the sensor and outputs sensing data
corresponding to a potential of a sensor signal output from the
sensor. A contact electrode is provided in a frame formed around
the sensor-integrated display panel to vary the potential of the
sensor signal when a conductor touches or does not touch to the
frame. An application executing device receives and analyzes the
sensing data and generates a signal to select an operating function
in accordance with an analysis result.
Inventors: |
HAYASHI; Makoto; (Tokyo,
JP) ; YAMADA; Jouji; (Tokyo, JP) ; NAKAGAWA;
Hirofumi; (Tokyo, JP) ; YAMAMOTO; Michio;
(Tokyo, JP) ; AZUMI; Kohei; (Tokyo, JP) ;
MIZUHASHI; Hiroshi; (Tokyo, JP) ; IKENO; Kozo;
(Tokyo, JP) ; KIDA; Yoshitoshi; (Tokyo,
JP) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Japan Display Inc. |
Minato-ku |
|
JP |
|
|
Assignee: |
Japan Display Inc.
Minato-ku
JP
|
Family ID: |
51620300 |
Appl. No.: |
15/363922 |
Filed: |
November 29, 2016 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
14878755 |
Oct 8, 2015 |
9557873 |
|
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15363922 |
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|
14183957 |
Feb 19, 2014 |
9195334 |
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14878755 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
G06F 3/0416 20130101;
G06F 2203/04108 20130101; G06F 3/04845 20130101; G06F 3/0412
20130101; G06F 3/04886 20130101; G06F 3/0418 20130101; G06F 3/044
20130101 |
International
Class: |
G06F 3/041 20060101
G06F003/041; G06F 3/044 20060101 G06F003/044 |
Foreign Application Data
Date |
Code |
Application Number |
Mar 29, 2013 |
JP |
2013-073869 |
Claims
1-13. (canceled)
14. An electronic device comprising: a sensor-integrated display
panel including an operation surface for performing an input
operation and an image display surface, which are formed integrally
with a sensor as one piece; a data transfer device which supplies
the sensor-integrated display panel with a drive signal for driving
the sensor and outputs three-dimensional image data corresponding
to a potential of a sensor signal output from the sensor, wherein
the three-dimensional image data includes at least one of
information which shows a three dimensional shape of an object
detected by the sensor, and which shows movement characteristics of
the object detected by the sensor; and an application executing
device which receives the three-dimensional image data from the
data transfer device, and processes and analyzes the
three-dimensional image data.
15. The electronic of claim 14, further comprising: a contact
electrode provided in a frame formed around the sensor-integrated
display panel to cause the potential of the sensor signal to vary
from a case in which a conductor touches the frame to a case in
which the conductor does not touch the frame when the input
operation is performed, wherein the application executing device
changes the processing of the three-dimensional image data in
accordance with a variation in the potential due to the contact
electrode.
16. The electronic device of claim 14, wherein the processing of
the three-dimensional image data includes varying or selecting a
threshold value to be taken out.
17. The electronic device of claim 14, wherein the application
executing device sets threshold value to capture the
three-dimensional image data.
18. The electronic device of claim 14, wherein the application
executing device varies threshold value to capture the
three-dimensional image data.
19. The electronic device of claim 14, wherein the
three-dimensional image data received to the application executing
device is one of modified into different forms, adjusted, and
changed.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application is based upon and claims the benefit of
priority from Japanese Patent Application No. 2013-073869, filed
Mar. 29, 2013, the entire contents of which are incorporated herein
by reference.
FIELD
[0002] Embodiments described herein relate generally to an
electronic device and a method for controlling the electronic
device.
BACKGROUND
[0003] Mobile phones, tablets, personal digital assistants (PDA),
small-sized portable personal computers and the like are
popularized. These electronic devices have a display panel and an
operation input panel that is formed integrally with the display
panel as one piece.
[0004] The operation input panel can detect a touch position on its
surface where a user touches, and generates a sensing signal as a
change of capacitance, for example. The sensing signal is supplied
to a touch signal processing integrated circuit (IC) which is
designed to exclusive use for the operation input panel. The touch
signal processing IC processes the sensing signal using a
computational algorithm prepared in advance, and converts the
user's touched position into coordinate data then output it.
[0005] As manufacturing technology is developed, the display panel
is increased in resolution and size. Accordingly, the operation
input panel is required to sense a position with high resolution.
The operation input panel is also required to process data input
thereto at high speed depending on applications. Furthermore, a
device capable of easily changing an application is desired.
BRIEF DESCRIPTION OF THE DRAWINGS
[0006] FIG. 1 is a block diagram of an electronic device according
to an embodiment;
[0007] FIG. 2A is a sectional view illustrating a sensor-integrated
display device including a display surface or a display panel and
an operation surface or an operation input panel;
[0008] FIG. 2B is an illustration of the principle for generating a
touch sensing signal from a signal which is output from the
operation input panel;
[0009] FIG. 3 is a perspective view illustrating sensor components
of the operation input panel and a method for driving the sensor
components;
[0010] FIG. 4 is a block diagram of a data transfer device shown in
FIG. 1, and some of the functions that are realized by different
applications in an application executing device shown in FIG.
1;
[0011] FIG. 5A is a chart showing an example of output timing
between a display signal and a drive signal for a sensor drive
electrode, which are output from the driver shown in FIGS. 1 and
4;
[0012] FIG. 5B is a schematic view illustrating the output based on
the drive signal for the sensor drive electrode and a driving state
of a common electrode;
[0013] FIG. 6 is a graph of raw data (sensed data) output from the
sensor when no input operation is performed;
[0014] FIG. 7 is a graph of raw data (sensed data) output from the
sensor when an input operation is performed;
[0015] FIG. 8A is a simplified diagram showing an example of use of
a mobile terminal according to the present embodiment;
[0016] FIG. 8B is a simplified diagram showing another example of
use of the mobile terminal according to the present embodiment;
[0017] FIG. 9A is a simplified diagram showing still another
example of use of the mobile terminal according to the present
embodiment;
[0018] FIG. 9B is a simplified diagram showing yet another example
of use of the mobile terminal according to the present
embodiment;
[0019] FIG. 10 is a flowchart of an application for achieving the
examples of use of the mobile terminal shown in FIGS. 8A, 8B, 9A
and 9B;
[0020] FIG. 11A is a simplified diagram showing another example of
use of the mobile terminal according to the present embodiment;
[0021] FIG. 11B is a chart of a signal waveform of a signal output
from a sensor in the mobile terminal shown in FIG. 11A;
[0022] FIG. 12A is a simplified diagram showing still another
example of use of the mobile terminal according to the present
embodiment;
[0023] FIG. 12B is a block diagram showing a signal output from the
sensor in the mobile terminal shown in FIG. 12A; and
[0024] FIG. 13 is a chart illustrating a touch signal and an output
signal of the sensor in the mobile terminal shown in FIG. 12A.
DETAILED DESCRIPTION
[0025] Various embodiments will be described hereinafter with
reference to the accompanying drawings.
[0026] In general, according to one embodiment, there are provided
an electronic device which is flexibly adaptable to a variety of
applications and which can receive a number of input information
for the applications, and a method for controlling the electronic
device.
[0027] According to an embodiment of the present disclosure, a
sensor-integrated display panel including an operation surface for
performing an input operation and an image display surface which
are formed integrally with a sensor as one piece. A data transfer
device supplies the sensor-integrated display panel with a drive
signal for driving the sensor and outputs sensing data
corresponding to a potential of a sensor signal output from the
sensor. A contact electrode is provided in a frame formed around
the sensor-integrated display panel to vary the potential of the
sensor signal based on whether a conductor touches the frame or the
conductor does not touch the frame. An application executing device
receives and analyzes the sensing data and generates a signal to
select an operating function in accordance with an analysis
result.
[0028] According to the embodiment, a number of usage types of
input information for, e.g., an input operation and a number of
determination functions can be set by the application executing
device, and the device can easily be used in different and various
ways. Moreover, the device can be increased in function by
associating the frame with touch data.
[0029] An embodiment will further be described with reference to
the drawings.
[0030] FIG. 1 shows a mobile terminal 1 according to the
embodiment. The mobile terminal 1 includes a sensor-integrated
display device 100. The device 100 is formed integrally with a
display surface (or a display panel) and an operation surface (or
an operation input panel or a touch panel) and includes a display
device component 110 and a sensor component 150 for these
surfaces.
[0031] The sensor-integrated display device 100 is supplied with a
display signal (or a pixel signal) from a driver 210, which will be
described later. When the device 100 receives a gate signal from
the driver 210, a pixel signal is input to a pixel of the display
device component 110. A voltage between a pixel electrode and a
common electrode depends upon the pixel signal. This voltage
displaces liquid crystal molecules between the electrodes to
achieve brightness corresponding to the displacement of the liquid
crystal molecules.
[0032] The sensor-integrated display device 100 may be called an
input sensor-integrated display unit, a user interface or the
like.
[0033] The display device component 110 may employ a liquid crystal
display panel, a light-emitting element such as an LED, or organic
EL. The display device component 110 can be simply called a
display. The sensor component 150 is of a capacitance change
sensing type. The sensor component 150 can be called a panel for
sensing a touch input, a gesture and the like.
[0034] The sensor-integrated display device 100 is connected to an
application executing device 300 via a data transfer device
200.
[0035] The data transfer device 200 includes a driver 210 and a
sensor signal detector 250. Basically, the driver 210 supplies the
display device component 110 with graphics data that is transferred
from the application executing device 300. The sensor signal
detector 250 detects a sensor signal output from the sensor
component 150.
[0036] The driver 210 and sensor signal detector 250 are
synchronized with each other, and this synchronization is
controlled by the application executing device 300.
[0037] The application executing device 300 is, for example, a
semiconductor integrated circuit (LSI), which is incorporated into
an electronic device, such as a mobile phone. The device 300
complexly performs a plurality of functions, such as Web browsing
and multimedia processing, using software with an OS.
[0038] These application processors perform a high-speed operation
and can be configured as a dual core or a quad core. Favorably, the
operation speed is, for example, 500 MHz and, more favorably, it is
1 GHz.
[0039] The driver 210 supplies a display signal (a signal into
which the graphics data is converted to an analog signal) to the
display device component 110 on the basis of an application. In
response to a timing signal from the sensor signal detector 250,
the driver 210 outputs a drive signal Tx for scanning the sensor
component 150. In synchronization with the drive signal Tx, the
sensor component 150 outputs a sensor signal Rx and supplies it to
the sensor signal detector 250.
[0040] The sensor signal detector 250 detects the sensor signal,
eliminates noise therefrom, and supplies the noise-eliminated
signal to the application executing device 300 as raw reading image
data (which may be called as three-dimensional image data).
[0041] When the sensor component 150 is of a capacity sensing type,
the image data is not only two-dimensional data simply representing
a coordinate but have a plurality of bits (e.g., three to seven
bits) which vary with the capacitance. Thus, the image data can be
called three-dimensional data including a physical quantity and a
coordinate. The capacitance varies with the distance between a
target (e.g., a user's finger) and a touch panel, the variation can
be captured as a change in physical quantity.
[0042] Below is the reason that the sensor signal detector 250 of
the data transfer device 200 directly supplies image data to the
application executing device 300, as described above.
[0043] The application executing device 300 is able to perform its
high-speed operating function to use the image data for various
purposes.
[0044] New different applications are applied to the application
executing device 300 according to user's various desires. The new
applications may require a change or a selection of image data
processing method, reading (or detection) timing, reading (or
detection) format, reading (or detection) area, and reading (or
detection) density depending on the data processing type.
[0045] If only the coordinate information is acquired as in the
prior art device, the amount of acquired information is restricted.
In the device of the present embodiment, however, if the raw
three-dimensional image data is analyzed, for example, distance
information as well as the coordinate information can be
acquired.
[0046] It is desired that the data transfer device 200 should
easily follow different operations under the control of
applications in order to expand the functions by the applications.
Thus, the device 200 is configured to select sensor signal reading
timing, a reading area, a reading density or the like arbitrarily
under the control of applications as a simple function. This point
will be described later.
[0047] The application executing device 300 may include a graphics
data generation unit, a radio interface, a camera-facility
interface and the like.
[0048] FIG. 2A is a cross sectional view of a basic structure of
the sensor-integrated display device 100 in which the display
device component 110 and sensor component 150, or the display panel
and operation input panel are formed integrally with each other as
one piece.
[0049] An array substrate 10 in which a common electrode 13 is
formed on a thin-film transistor (TFT) substrate 11 and a pixel
electrode 12 is formed above the common electrode 13 with an
insulation film between them. A counter substrate 20 is arranged
opposite to and parallel with the array substrate 10 with a liquid
crystal layer 30 between them. In the counter substrate 20, a color
filter 22, a glass substrate 23, a sensor detecting electrode 24
and a polarizing plate 25 are formed in order from the liquid
crystal layer 30.
[0050] The common electrode 13 is served as a drive electrode for a
sensor (or a common drive electrode for a sensor) as well as a
common electrode for display.
[0051] FIG. 2B shows the voltage which is varied from V0 to V1 when
a conductor, such as a user's fingertip, is close to an
intersection between the common electrode and the sensor drive
electrode, the voltage is generated from the intersection and read
out through the sensor detecting electrode. When the user's finger
is not in contact with the touch panel, current corresponding to
the capacity of the intersection (referred to as a first capacitive
element hereinafter) flows according to the charge/discharge of the
first capacitive element. At this time, the first capacitive
element has, for example, potential waveform V0 at one of electrode
of the first capacitive element, as shown in FIG. 2B. When the
user's finger moves close to the sensor detect electrode, a second
capacitive element is formed by the finger and connected to the
first capacitive element. In this state, current flows through each
of the first and second capacitive elements when these elements are
droved and charged/discharged. At this time, the first capacitive
element has, for example, potential waveform V1 at the one of
electrode, as shown in FIG. 2B, and this potential waveform is
detected by a detection circuit. At this time, the potential of the
one of electrode of the first capacitive element is a divided
potential which depends upon the current flowing through the first
and second capacitive elements. Thus, the value of waveform V1 is
smaller than that of waveform V0. It is therefore possible to
determine whether a user's finger is in contact with a sensor by
comparing a sensor signal Rx and a threshold value Vth with each
other.
[0052] FIG. 3 is a perspective view illustrating the sensor
component of the operation input panel and a method for driving the
sensor component and showing a relationship in arrangement between
the sensor detecting electrode 24 and the common electrode 13. The
arrangement shown in FIG. 3 is one example and thus the operation
input panel is not limited to it.
[0053] FIG. 4 shows the sensor-integrated display device 100, data
transfer device 200 and application executing device 300 and also
shows the internal components of the data transfer device 200 and
application executing device 300.
[0054] The data transfer device 200 mainly includes the driver 210
and the sensor signal detector 250. The driver 210 and the sensor
signal detector 250 can be called an indicator driver IC and a
touch IC, respectively. Though they are separated from each other,
they can be formed integrally as one chip.
[0055] The driver 210 receives display data from the application
executing device 300. The display data is time-divided and has a
blanking period. The display data is supplied to a timing circuit
and digital-to-analog converter 212 through a video random access
memory (VRAM) 211 serving as a buffer. In mobile terminal 1, the
VRAM 211 may have a capacity of one frame or smaller.
[0056] A display signal SigX indicative of an analog quantity is
amplified by an output amplifier 213 and supplied to the
sensor-integrated display device 100 for writing it to a display
element. The timing circuit and digital-to-analog converter 212
detects a blanking signal or a blanking period and supplies a
detected signal to a timing controller 251 of the sensor signal
detector 250. The timing controller 251 may be provided in the
driver 210 and called a synchronization circuit.
[0057] The timing controller 251 generates a drive signal to drive
the sensor during a given period of the display signal (which may
be a blanking period of the display signal, for example). The drive
signal is amplified by an output amplifier 214 and supplied to the
sensor-integrated display device 100.
[0058] The drive signal Tx drives the sensor detecting electrode to
output the sensor signal Rx from the sensor-integrated display
device 100. The sensor signal Rx is input to an integrating circuit
252 in the sensor signal detector 250. The sensor signal Rx is
compared with a reference voltage (threshold value) Vref by the
integrating circuit 252. If the level of the sensor signal Rx is
the reference voltage or higher, the integrated circuit 252
integrates the sensor signal Rx in a capacitor and outputs an
integral signal. Then, the sensor signal Rx is reset by a switch
for each detection unit time period, and an analog signal can be
output based on the sensor signal Rx. The analog signal from the
integrating circuit 252 is supplied to a sample hold and
analog-to-digital converter 253 and converted to digital data. The
digital data is supplied as raw data to the application executing
device 300 through a digital filter 254.
[0059] The digital data is three-dimensional data (multivalued
data) including both the detected data and non-detected data of an
input operation. A presence detector 255 operates when the
application executing device 300 is in a sleep mode and no
coordinates of a touched position on the operating surface are
detected. If there is any object close to the operating surface,
the presence detector 255 is able to sense the object and release
the sleep mode.
[0060] The application executing device 300 receives and analyzes
the digital data. In accordance with a result of the analysis, the
device 300 is able to output the display data or select an
operating function of the mobile terminal.
[0061] The application executing device 300 is able to expand
different applications and set an operating procedure of the
device, select a function, generate and select a display signal,
select a display signal, and the like. Using a sensor signal output
from the sensor signal detector 250, the device 300 is able to
analyze an operating position through coordinate processing. The
sensor signal is processed as image data and thus three-dimensional
image data can be formed by an application. The device 300 is also
able to, for example, register, erase and confirm the
three-dimensional image data. Furthermore, the device 300 is able
to compare the registered image data with the acquired image data
to lock or unlock an operating function.
[0062] Upon acquiring the sensor signal, the application executing
device 300 is able to change the frequency of a drive signal from
the timing controller 251 to the sensor detecting electrode and
control the output timing of the drive signal. Accordingly, the
device 300 is able to select a driving area of the sensor component
150 and set the driving speed thereof.
[0063] Furthermore, the application executing device 300 is also
able to detect the density of the sensor signal and add data to the
sensor signal.
[0064] FIG. 5A shows an example of a timing chart between the
time-divided display data SigX and the sensor drive signal Tx
(Tx1-Txn) which are output from the data transfer device 200. FIG.
5B schematically shows that the sensor component 150 including the
common electrode and the sensor detecting electrode is
two-dimensionally scanned by a common electrode Vcom and the sensor
drive signal Tx. The common voltage Vcom is applied to the common
electrode 13 in order. And the common electrode 13 is applied the
drive signal Tx to obtain a sensor signal during a given period of
time.
[0065] The display data SigX and the sensor drive signal Tx may be
supplied from the application executing device 300 to the driver
210 by time division via the same bus. Furthermore, the display
data SigX and the sensor drive signal Tx can be separated from each
other by the timing circuit and digital-to-analog converter 212.
The sensor drive signal Tx is supplied to the common electrode 13,
described above, via the timing controller 251 and the amplifier
214. For example, the timing at which the timing controller 251
outputs the sensor drive signal Tx and the frequency of the sensor
drive signal TX can be varied according to an instruction of the
application executing device 300. The timing controller 251 is able
to supply a reset timing signal to the integrating circuit 252 of
the sensor signal detector 250 and also supply a clock to the
sample hold and analog-to-digital converter 253 and the digital
filter 254.
[0066] FIG. 6 is a graph showing an example of raw data output from
the sensor when no input operation is detected.
[0067] FIG. 7 is a graph showing an example of raw data output from
the sensor when an input operation is detected.
[0068] FIGS. 8A and 8B each show an example of use of the mobile
terminal 1. The mobile terminal 1 has a display and operation
surface 52 that is surrounded by a frame (casing) 51.
[0069] On the display and operation surface 52, different images
are displayed according to applications. In the examples of FIGS.
8A and 8B, different selection buttons a1-a4, b1-b4, c1-c4, s1-s4
are displayed as images.
[0070] In the example of FIG. 8A, a user touches, for example, the
selection button s1 with his or her thumb and selects it. At this
time, the display and operation surface 52 indicates that one of
the selection buttons a1-a4, for example is selectable.
Accordingly, display states of the selection buttons a1-a4 are
changed, highlighted for example, and the other selection buttons
b1-b4 and c1-c4 are displayed in gray, for example.
[0071] In the example of FIG. 8B, a user touches, for example, the
selection button s2 with his or her thumb and selects it. At this
time, the display and operation surface 52 indicates that one of
the selection buttons b1-b4, for example is selectable.
[0072] Accordingly, the selection buttons b1-b4 are highlighted and
the other selection buttons a1-a4 and c1-c4 are displayed in gray,
for example.
[0073] As described above, the mobile terminal 1 includes the
selection buttons. The selection buttons allow a user to select an
operating mode or an operating function by one hand. Thus, the user
can select an operating mode or an operating function by the left
hand and perform an input operation by the right hand.
[0074] FIG. 9A shows an example of the operation of the mobile
terminal 1 performed when a drawing application is started. In this
example, a user touches the selection button s1 with his or her
thumb. At this time, a drawing line input by, for example, a stylus
is displayed thickly according to the drawing application.
[0075] FIG. 9B shows an example in which the user touches the
selection button s2 with the thumb. At this time, a drawing line
input by, for example, a stylus is displayed thinly according to
the drawing application. When the user touches another selection
button with his or her left thumb, a stylus input operation
performed by the right hand work as a rubber eraser.
[0076] The mobile terminal 1 is not limited to the above
embodiment. The mobile terminal 1 can be so configured that the
user can touch, for example, a coloring selection button by one
hand. When the user colors a drawn figure as shown in FIG. 9B, the
coloring can be changed by the operation described with reference
to FIGS. 8A and 8B or FIGS. 9A and 9B.
[0077] In the mobile terminal 1, the capacity for image data varies
according to the distance between a target (e.g., a user's
fingertip) and the touch panel and thus the image data can be
processed as not only coordinate information but also
three-dimensional data that indicates the variation captured as a
variation in physical quantity.
[0078] Thus, an application for recognizing a three-dimensional
shape as well as a coordinate, an application for recognizing
movement characteristics of the object when an object moves on the
operating surface, or the like can be used. If these applications
are used, a threshold value can be set or varied to capture the
three-dimensional image data. More specifically, in the mobile
terminal 1, three-dimensional image data is transferred to the
application executing device, and the three-dimensional image data
can be modified into different forms, adjusted, changed or the like
to use, thereby bringing about a number of advantages of
recognition of three-dimensional distance, recognition of
three-dimensional shape and the like.
[0079] In the mobile terminal 1 described above, a function can be
selected, some of the functions can be started or stopped, or a
method for capturing three-dimensional image data can be changed
according to a position on which a user touches. Setting or
switching in usage types of the three-dimensional image data
described above may be set depending on the combination with a
detection signal of a touch (contact) to the frame, which will be
described as follows.
[0080] FIG. 10 shows a procedure of an operation that is performed
by the application executing device 300 in order to perform the
operations illustrated in FIGS. 8A through 9B. Coordinate
processing is applied to three-dimensional image data generated
from the sensor (step SS1). In the coordinate processing, it is
determined which selection button is selected (step SS2). In
accordance with a result of the determination, an operating mode is
determined and a function is selected (step SS3)
[0081] FIGS. 11A and 11B show a mobile terminal according to
another embodiment, in which a function or an operation is selected
according to whether a user (human body) touches the frame or
not.
[0082] In the embodiment shown in FIGS. 11A and 11B, a plurality of
conductor contact electrodes P are arranged in a frame 51 served as
a case, for example.
[0083] When the mobile terminal is turned on and left for a fixed
time period, a conductor (reference potential conductor) of the
lowest potential (usually called a ground potential or a reference
potential) is connected to each of the conductor contact electrodes
P through a switch. This switch is controlled by a driver 210.
[0084] When the user touches the conductor contact electrodes P (or
the user holds the mobile terminal by the left hand, for example)
and touches the operation surface of the mobile terminal with the
right hand, the level of a sensor output signal decreases from V0
to V2 and at this time a difference potential vd becomes relatively
high. This is because the reference potential of the mobile
terminal in the normal mode is further lowered (becomes zero) due
to the contact of the human body.
[0085] If an application determines the above sensing (the contact
of the human body), it turns off a switch between the conductor
contact electrodes P and the reference potential conductor, then
cuts off the frame contact sensing function. Moreover, the
application is able to start an operation input determination
function, and to set a proper status of use of the mobile terminal.
In the subsequent normal operation, when an input operation is
detected, the sensor output signal corresponds to output voltage V1
that is decreased from V0, as described with reference to FIG.
2B.
[0086] FIGS. 12A and 12B show still another embodiment in which a
rectangular frame 51 is divided into a plurality of areas 14a to
14h and a plurality of conductor contact electrodes P are
distributed to the areas 14a to 14h. In this embodiment, it can be
determined what area includes a conductor contact electrode P that
is in contact with a human body. For example, the conductor contact
electrodes P from the areas 14a to 14h are sequentially switched to
an active state, and an area where a difference voltage dv (see
FIG. 11B) is detected is determined. To make the conductor contact
electrodes P of the areas 14a to 14h active and inactive in
sequence, a switch between the conductor contact electrodes P and
the reference potential conductor has only to be turned on or off
on time-division basis in response to a frame electrode control
signal Fv. If a drive signal is supplied when the switch is turned
on, a sensor output signal can be generated.
[0087] The frame electrode control signal Fv is output from, for
example, the driver 210, as shown in FIG. 12B. The signal output
from a frame electrode served as a sensor is derived as Rx. Rx is
data detected by and output from the sensor signal detector
250.
[0088] The application executing device 300 includes an electrode
control signal instruction unit(or a frame potential scanning
instruction) for outputting the frame electrode control signal Fv,
a contact position analysis unit for analyzing the sensor output
signal, and a function selection unit for selecting a function in
accordance with a result of the analysis. In order to fulfill the
functions of these units, the application executing device 300
outputs an instruction on the basis of the operating procedure of
an application.
[0089] FIG. 13 illustrates a signal waveform to describe an example
of an operation of the above embodiment. In FIG. 13, a touch signal
is a signal for making areas 14a to 14h of a frame active and
inactive in sequence in response to the frame electrode control
signal Fv. Assuming here that a conductor contact electrode of,
e.g., an area 4g as shown in FIG. 12A is made active and a user
touches a position on the operation surface with his or her right
fingertip, a negative potential (applied signal) which is lower
than the reference potential is applied to the position in which
the user touches with the fingertip. Therefore, as described with
reference to FIG. 11B, a high difference potential dv other than a
normal one is generated as Rx, with the result that the application
executing device 300 is able to recognize that the user holds an
area 14g of a frame 15.
[0090] In the mobile terminal, an operating function can be
selected in accordance with a user's holding position by making use
of the above functions. For example, it can be determined whether
the user is a right-handed person or a left-handed person in
accordance with the holding position. An operating mode can be
selected according to whether the user is a right-handed person or
a left-handed person. Furthermore, it can be determined whether the
user holds the mobile terminal by both hands.
[0091] When it is determined whether the user is a right-handed
person or a left-handed person, a selection button can be displayed
for the right-handed person or the left-handed person. When the
user holds the mobile terminal by both hands, the operating mode
may be changed to a camera shooting mode. When an operating mode is
selected in accordance with the user's holding position, it may be
displayed by a message or notified by voice.
[0092] According to the above-described mobile terminal, a time
period during which an input operation on the operation surface is
detected and a time period during which a user touches the frame
can be set on time-division basis. For example, while detecting an
input operation, the mobile terminal is able to determine a
position of the frame which the user touches. If the user touches
another position thereof, an application for selecting an operating
function of the mobile terminal can be employed.
[0093] In the foregoing description, the sensor-integrated display
device is configured to include a liquid crystal display device as
a display device; however, it can be configured to include another
display device such as an organic electroluminescence display
device. In the example shown in FIG. 2, the liquid crystal device
is so configured that an array substrate includes both a pixel
electrode and a common electrode, or a lateral electric field
(including a fringe electric field) is utilized chiefly in an
in-plane switching (IPS) mode, a fringe field switching (FFS) mode
or the like. The liquid crystal display device is not limited to
this configuration. At least the pixel electrode can be included in
the array substrate and the common electrode can be included in
either one of the array substrate and counter substrate. If a
vertical electric field is utilized chiefly in a twisted nematic
(TN) mode, an optically compensated bend (OCB) mode, a vertical
aligned (VA) mode or the like, the common electrode is included in
the counter substrate. In other words, the common electrode has
only to be arranged between an insulation substrate that
constitutes the TFT substrate and an insulation substrate that
constitutes the counter substrate.
[0094] The names of the blocks and components are not limited to
those described above, nor are the units thereof. The blocks and
components can be shown in a combined manner or in smaller units.
Even though the term "unit" is replaced with "device," "section,"
"block" and "module," they naturally fall within the scope of the
present disclosure. Even though the structural elements in the
claims are each expressed in a divided manner or they are expressed
in a combined manner, they fall within the scope of the present
disclosure. The method claim corresponds to the device claim.
[0095] The above embodiments of the present disclosure are each
described as an example and do not aim at limiting the scope of the
present disclosure. The embodiments can be reduced to practice in
different ways, and their structural elements can be omitted,
replaced and modified in different ways without departing from the
spirit of the disclosure. Even though the structural elements are
each expressed in a divided manner or they are expressed in a
combined manner, they fall within the scope of the present
disclosure. Even though the claims are recited as step claims or
program claims, these claims correspond to the device claims. The
embodiments and their modifications fall within the scope and
spirit of the disclosure and also fall within the scope of the
disclosure recited in the claims and its equivalents.
[0096] While certain embodiments have been described, these
embodiments have been presented by way of example only, and are not
intended to limit the scope of the inventions. Indeed, the novel
embodiments described herein may be embodied in a variety of other
forms; furthermore, various omissions, substitutions and changes in
the form of the embodiments described herein may be made without
departing from the spirit of the inventions. The accompanying
claims and their equivalents are intended to cover such forms or
modifications as would fall within the scope and spirit of the
inventions.
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