JPWO2015068619A1 - Display device - Google Patents

Abstract

The display device (1) includes a displacement sensor (12), a touch sensor (13), a displacement state detection unit (14), a touch position detection unit (15), a control unit (16), a storage unit (21), and a RAM (22). ), A display unit (30), a wireless LAN communication unit (60), and a battery (70). The displacement sensor (12) has a bending displacement sensor (35) and a torsional displacement sensor (36). The bending displacement sensor (35) outputs the detection voltage VM output from the piezoelectric film (350) to the displacement state detection unit (14). The torsional displacement sensor (36) of the displacement sensor (12) outputs the detection voltage VW output from the piezoelectric film (360) to the displacement state detection unit (14). The displacement state detection unit (14) detects the displacement state from the voltage distribution of the detection voltages VM and VW, and outputs the detection result of the displacement state to the control unit (16). A control part (16) produces | generates image data based on the detection result of a displacement state, and outputs it to a display part (30).

Description

  The present invention relates to a display device that detects displacement of a casing by a user operating the casing of the apparatus main body.

  Conventionally, various display devices have been devised in which a user operates a housing of an apparatus body to detect displacement of the housing. For example, in Patent Document 1, a display unit having a display surface for displaying an image and a back surface facing the display surface, and two piezoelectric elements provided on the upper left and lower left of the back surface (upper right and lower right from the display surface side). An electronic paper comprising a sensor is disclosed.

  In the electronic paper of Patent Document 1, when the display unit displays the first page on the display surface and the user bends the display unit, the electronic paper detects the bending displacement of the display unit with a piezoelectric sensor. Thereby, the electronic paper turns the page and displays the second page next to the first page on the display surface.

JP 2004-318123 A

  However, in the electronic paper of Patent Document 1, the intuitive input operation that the user can perform on the electronic paper is only a bending operation. For this reason, the electronic paper described in Patent Document 1 has a problem that there are few types of intuitive input operations that can be performed by the user.

  Accordingly, an object of the present invention is to provide a display device that can perform a bending operation and a twisting operation, and allows a user to perform a variety of intuitive input operations.

  The display device according to the present invention includes a display unit, a control unit, a housing, and a detection unit. The control unit executes application software for displaying the first image on the display unit. The detection unit individually detects bending and twisting of the housing.

  The control unit performs display processing for displaying a second image on the display unit when the detection unit detects either bending or twisting of the housing during execution of the application software, and the detection unit performs bending of the housing. When the other of the twist and the twist is detected, a display process for displaying the third image on the display unit is performed. The second image is different from the first image. The third image is different from both the first image and the second image.

  In this configuration, during execution of the application software, the user performs a bending operation or a twisting operation on the casing while viewing the first image displayed on the display unit. When the user performs any one of the twisting operation and the bending operation, display processing for displaying the second image on the display unit is performed by the control unit. In addition, when the user performs either the twisting operation or the bending operation, display processing for displaying the third image on the display unit is performed by the control unit.

  Therefore, the user can perform a variety of intuitive input operations on the display device by displacing (bending or twisting) the housing during execution of the application software.

  Therefore, according to this configuration, it is possible to realize a display device that can perform a bending operation and a twisting operation, and allows the user to perform a variety of intuitive input operations.

  The display device of the present invention preferably has the following configuration. The detection unit detects the bending direction of the housing, the bending amount of the housing, the twisting direction of the housing, and the twisting amount of the housing. The control unit performs display processing for displaying a second image on the display unit according to the twist direction of the housing and the twist amount of the housing when the detecting unit detects the twist of the housing during execution of the application software. When the detection unit detects bending of the housing, display processing is performed to display a third image on the display unit according to the bending direction of the housing and the bending amount of the housing.

  In this configuration, during execution of the application software, the user performs a bending operation or a twisting operation on the casing while viewing the first image displayed on the display unit. At this time, the user can change the amount of twisting of the housing or the amount of bending of the housing.

  When the user performs a twisting operation, display processing for displaying the second image on the display unit is performed by the control unit in accordance with the twisting direction of the housing and the twisting amount of the housing. When the user performs a bending operation, display processing for displaying the third image on the display unit is performed by the control unit in accordance with the bending direction of the housing and the bending amount of the housing.

  Therefore, the user can displace (bend or twist) the housing during the execution of the application software, and perform more diverse and intuitive input operations on the display device.

  Therefore, according to this configuration, it is possible to realize a display device that can perform a bending operation and a twisting operation, and allows the user to perform a more diverse and intuitive input operation.

  The display device of the present invention preferably has the following configuration. The application software is application software for displaying electronic books. When the detection unit detects twisting of the housing while the application software is running, the controller turns the page in the page direction according to the twisting direction of the housing at a speed corresponding to the twisting amount of the housing, and detects it. When the unit detects the bending of the housing, the page is enlarged or reduced in the enlargement / reduction direction according to the bending direction of the housing and the magnification according to the bending amount of the housing.

  In this configuration, while the application software for displaying an electronic book is being executed, the user performs a twisting operation on the housing to turn the page of the electronic book, and performs a bending operation on the housing to perform a predetermined page. You can zoom in and out. At this time, the user can change the page turning speed by changing the amount of twisting of the housing. Further, the user can change the magnification of the page by changing the amount of bending of the housing.

  Therefore, the user can displace (bend or twist) the housing while executing the application software for displaying the electronic book, and perform a more diverse and intuitive input operation on the display device.

  Therefore, according to this configuration, it is possible to realize a display device that can perform a bending operation and a twisting operation, and allows the user to perform a more diverse and intuitive input operation.

  The display device of the present invention is preferably a portable terminal.

  The display device having this configuration is large and heavy enough to be carried by the user. In this configuration, the user holds the display device with both hands and performs a bending operation or a twisting operation with both hands.

  In addition, the display device of the present invention includes an operation surface on which the first image, the second image, or the third image is displayed by the display unit, and a touch sensor that detects an operation position on the operation surface. It is preferable.

  According to this configuration, the user can perform not only a bending operation and a twisting operation on the housing but also a touch operation on the operation surface to perform a variety of intuitive input operations on the display device.

  In the display device of the present invention, the detection unit preferably includes a piezoelectric film formed of a chiral polymer.

  In this configuration, the detection unit can reliably detect the displacement of the piezoelectric film with high sensitivity.

  In the display device of the present invention, the chiral polymer is preferably polylactic acid.

  In this configuration, the detection unit can reliably detect the displacement of the piezoelectric film with high sensitivity.

  In the display device of the present invention, the polylactic acid is preferably L-type polylactic acid.

  In this configuration, the detection unit can reliably detect the displacement of the piezoelectric film with high sensitivity.

  According to the present invention, it is possible to realize a display device that can perform a bending operation and a twisting operation and allows a user to perform a variety of intuitive input operations.

1 is an external perspective view of a display device 1 according to an embodiment of the present invention. It is sectional drawing of the SS line | wire shown in FIG. It is a top view of the touch sensor 13 shown in FIG. It is a top view of the displacement sensor 12 shown in FIG. It is a side view of the displacement sensor 12 shown in FIG. It is a reverse view of the displacement sensor 12 shown in FIG. It is a block diagram of the display apparatus 1 shown in FIG. It is a conceptual diagram before bending the housing | casing 100 shown in FIG. It is a conceptual diagram of the state which bent the housing | casing 100 shown in FIG. It is a conceptual diagram before twisting the housing | casing 100 shown in FIG. It is a conceptual diagram of the state which twisted the housing | casing 100 shown in FIG. It is a figure which shows the voltage distribution in the state which bent and twisted the housing | casing 100 shown in FIG. It is a figure which shows the relationship between the displacement state in an electronic book app, and a display process. It is a flowchart which shows the operation | movement which the control part 16 shown in FIG. 7 performs during execution of the electronic book app. It is a figure which shows the relationship between the displacement state in a photograph display app, and a display process. It is a flowchart which shows the operation | movement which the control part 16 shown in FIG. 7 performs during execution of photograph display app.

  A display device according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an external perspective view of a display device 1 according to an embodiment of the present invention. 2 is a cross-sectional view taken along line S-S shown in FIG. FIG. 3 is a plan view of the touch sensor 13 shown in FIG. 4 is a plan view of the displacement sensor 12 shown in FIG. FIG. 5 is a side view of the displacement sensor 12 shown in FIG. 6 is a rear view of the displacement sensor 12 shown in FIG. FIG. 7 is a block diagram of the display device 1 shown in FIG.

  As shown in FIG. 1, the display device 1 is a tablet, for example, and has a size and weight that are portable. Therefore, the user performs an input operation on the display device 1 while holding the display device 1 with both hands. The display device 1 includes a housing 100.

  The casing 100 has a rectangular parallelepiped shape whose length and width are larger than the thickness, and has a shape in which the top surface is opened. As shown in FIGS. 1 and 2, the casing 100 is fitted with a flat touch panel 10 so as to close the opening surface of the casing 100. One main surface of the touch panel 10 is an operation surface 101. The touch panel 10 is made of a translucent material. The touch panel 10 includes a touch sensor 13 and a protective film 503.

  As shown in FIGS. 1 and 2, the touch sensor 13, the displacement sensor 12, the display unit 30, the control circuit module 52, and the like are arranged in this order from the operation surface 101 side in the housing 100. The touch sensor 13, the displacement sensor 12, and the display unit 30 have a flat plate shape, and are arranged on the housing 100 so that each flat plate surface is parallel to the operation surface 101.

  A circuit board (not shown) is disposed between the bottom surface of the housing 100 and the display unit 30, and the control circuit module 52 is mounted on the circuit board. The control circuit module 52 is a module that implements the control unit 16, the storage unit 21, the wireless LAN communication unit 60, and the RAM 22 shown in FIG. The control circuit module 52 is connected to the touch sensor 13, the displacement sensor 12, the displacement state detection unit 14, the touch position detection unit 15, the display unit 30, and the battery 70.

  The displacement sensor 12 and the displacement state detector 14 constitute a “detector” of the present invention.

  The touch sensor 13 is an electrostatic sensor, and includes an insulating substrate 131, a plurality of segment electrodes 401, and a plurality of common electrodes 402, as shown in FIGS.

  The insulating substrate 131 is made of a rectangular flat film having a first main surface and a second main surface facing each other. The insulating substrate 131 is made of a material having a predetermined dielectric constant, and has a strength that does not hinder displacement (bending or twisting) of the base substrate 501 described later as much as possible. The insulating substrate 131 is preferably a light-transmitting material.

  A protective film 503 is provided on the surface of the touch sensor 13 opposite to the displacement sensor 12. The protective film 503 is made of a flexible and insulating material. The protective film 503 is made of a light-transmitting material. For example, PET or PP is preferably used for the protective film 503.

  On the first main surface, which is one main surface of the insulating substrate 131, a plurality of segment electrodes 401 are arranged at predetermined intervals. Each of the plurality of segment electrodes 401 has a long shape, and is arranged along a direction orthogonal to the long direction.

  On the second main surface, which is the other main surface of the insulating substrate 131, a plurality of common electrodes 402 are arranged and arranged at a predetermined interval. Each of the plurality of common electrodes 402 has a long shape and is arranged along a direction orthogonal to the long direction. The plurality of segment electrodes are arranged so that the longitudinal direction of the plurality of common electrodes 402 and the longitudinal direction of the plurality of segment electrodes 401 are substantially orthogonal to each other when viewed from the direction orthogonal to the first main surface and the second main surface. 401 and a plurality of common electrodes 402 are formed.

  In the above configuration, the touch sensor 13 detects a change in capacitance that occurs when a user's finger approaches or comes into contact with the segment electrode 401 and the common electrode 402, and a signal based on this detection is sent to the control circuit module 52. Output.

  As shown in FIG. 2, the insulating film 500 is sandwiched between the touch sensor 13 and the displacement sensor 12 and is made of a rectangular flat film. The insulating film 500 is made of a material having a predetermined dielectric constant, and insulates the touch sensor 13 and the displacement sensor 12 from each other. The insulating film 500 has a strength that does not hinder displacement (bending or twisting) of the base substrate 501 described later as much as possible. The insulating film 500 is preferably a light-transmitting material.

  As shown in FIGS. 2 and 4 to 6, the displacement sensor 12 includes a base substrate 501, a bending displacement sensor 35, and a torsional displacement sensor 36.

  The base substrate 501 is an insulating substrate and is formed of a relatively high strength polymer such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polycarbonate (PC), acrylic resin (PMMA), or the like. The thickness of the base substrate 501 is appropriately set according to the strength required for the base substrate 501.

  The bending displacement sensor 35 is attached to the third main surface of the base substrate 501 on the operation surface 101 side. The bending displacement sensor 35 includes a rectangular piezoelectric film 350. Electrodes 351 and 352 are formed on substantially the entire surface of both main surfaces of the piezoelectric film 350, respectively. An external connection terminal 41A is connected to the electrode 351, and an external connection terminal 42A is connected to the electrode 352.

  The torsional displacement sensor 36 is attached to the fourth main surface of the base substrate 501 that faces the third main surface. The torsional displacement sensor 36 includes a rectangular piezoelectric film 360. Electrodes 361 and 362 are formed on substantially the entire surface of both main surfaces of the piezoelectric film 360, respectively. An external connection terminal 41B is connected to the electrode 361, and an external connection terminal 42B is connected to the electrode 362.

  The piezoelectric films 350 and 360 may be piezoelectric films, but are preferably formed of uniaxially stretched polylactic acid (PLA), and further L-type polylactic acid (PLLA). .

  The piezoelectric film 350 is formed of uniaxially stretched L-type polylactic acid (PLLA). In the present embodiment, the piezoelectric film 350 is uniaxially stretched in a direction substantially along the diagonal line of the rectangle (see the solid arrow in FIG. 4). Hereinafter, this direction is referred to as a uniaxial stretching direction 901. The uniaxial stretching direction 901 preferably forms an angle of 45 ° with respect to the longitudinal direction or the lateral direction of the piezoelectric film 350. However, the angle is not limited to this, and an optimum angle may be designed in consideration of the characteristics of the piezoelectric film 350 and the usage state of the apparatus.

  The piezoelectric film 360 is made of uniaxially stretched L-type polylactic acid (PLLA). In the present embodiment, the piezoelectric film 350 is uniaxially stretched in the direction along the longitudinal direction of the rectangle (see the solid arrow in FIG. 6). Hereinafter, this direction is referred to as a uniaxial stretching direction 903. The uniaxial stretching direction 903 preferably forms an angle of 0 ° with the longitudinal direction of the piezoelectric film 360. However, the angle is not limited to this, and an optimum angle may be designed in consideration of the characteristics of the piezoelectric film 360 and the usage state of the apparatus.

  Note that the angle is not limited to 45 ° and may be approximately 45 °. About 45 ° means an angle including about 45 ° ± 10 °, for example. Similarly, it may be substantially 0 ° without being limited to the exact 0 °. Substantially 0 ° means an angle including about 0 ° ± 10 °, for example. These angles are design items that should be determined as appropriate based on the overall design, such as bending detection accuracy, based on the application of the displacement sensor.

  In the bending displacement sensor 35 and the torsional displacement sensor 36, the uniaxial stretching direction 901 of the piezoelectric film 350 and the uniaxial stretching direction 903 of the piezoelectric film 360 form 45 °, and the longitudinal direction (= uniaxial stretching direction) of the piezoelectric film 360 is The base substrate 501 is attached to the base substrate 501 so that the longitudinal direction thereof is parallel.

  The aforementioned PLLA is a chiral polymer, and the main chain has a helical structure. PLLA is uniaxially stretched and has piezoelectricity when the molecules are oriented. The uniaxially stretched PLLA generates electric charges when the flat film surface of the piezoelectric film is pressed. At this time, the amount of charge generated is uniquely determined by the amount of displacement of the flat membrane surface in the direction orthogonal to the flat membrane surface by pressing. The piezoelectric constant of uniaxially stretched PLLA belongs to a very high class among polymers.

  Therefore, by using PLLA, displacement of the piezoelectric films 350 and 360 due to twisting or bending of the housing 100 can be detected reliably and with high sensitivity. That is, it is possible to reliably detect the twist or bend of the housing 100 and to detect the twist or bend with high sensitivity.

  The draw ratio is preferably about 3 to 8 times. By performing a heat treatment after stretching, crystallization of the extended chain crystal of polylactic acid is promoted and the piezoelectric constant is improved. In addition, when biaxial stretching is performed, the same effect as uniaxial stretching can be obtained by varying the stretching ratio of each axis. For example, when a certain direction is taken as an X-axis, 8 times in that direction, and 2 times in the Y-axis direction perpendicular to that axis, the piezoelectric constant is about 4 times in the X-axis direction, The same effect can be obtained. Since a film that is simply uniaxially stretched easily tears along the direction of the stretch axis, the strength can be somewhat increased by performing biaxial stretching as described above.

  In addition, PLLA generates piezoelectricity by molecular orientation treatment such as stretching, and does not need to be polled like other polymers such as PVDF or piezoelectric ceramics. That is, the piezoelectricity of PLLA that does not belong to ferroelectrics is not expressed by the polarization of ions like ferroelectrics such as PVDF and PZT, but is derived from a helical structure that is a characteristic structure of molecules. is there.

  For this reason, the pyroelectricity generated in other ferroelectric piezoelectric materials does not occur in PLLA. Further, PVDF or the like shows a change in piezoelectric constant over time, and in some cases, the piezoelectric constant may be significantly reduced, but the piezoelectric constant of PLLA is extremely stable over time. Therefore, the displacement of the piezoelectric films 350 and 360 due to the twisting or bending of the housing 100 can be detected with high sensitivity without being affected by the surrounding environment.

PLLA has a large piezoelectric output constant (= piezoelectric g constant, g = d / ε ^T ). Therefore, displacement can be detected with extremely high sensitivity by using PLLA.

  Further, the electrodes 351, 352, 361, 362 are largely displaced from the base substrate 501, so that organic electrodes mainly composed of ITO, ZnO, polythiophene, organic electrodes composed mainly of polyaniline, silver nanowire electrodes, carbon nanotube electrodes It is preferable to use either of these. By using these materials, it is possible to form an electrode pattern that has excellent flexibility and high translucency.

  A protective film 502 is disposed on the surface of the displacement sensor 12 opposite to the operation surface 101. The protective film 502 is made of an insulating material. The protective film 502 is made of a light-transmitting material. For example, PET or PP is preferably used for the protective film 502.

  As shown in FIGS. 1 and 2, a display unit 30 is disposed on the main surface of the displacement sensor 12 opposite to the operation surface 101 inside the housing 100. The display unit 30 includes a so-called flat display, and specifically includes a liquid crystal display element. The display unit 30 includes a liquid crystal panel 301, a front polarizing plate 302, a back polarizing plate 303, and a backlight 304. The front polarizing plate 302 and the back polarizing plate 303 are arranged so as to sandwich the liquid crystal panel 301 therebetween. The backlight 304 is disposed on the opposite side of the liquid crystal panel 301 with the back polarizing plate 303 interposed therebetween.

  In the above configuration, the touch sensor 13, the insulating film 500, the displacement sensor 12, and the protective film 502 are all formed of a light-transmitting material. Therefore, the user can view the image displayed on the display unit 30 on the operation surface 101.

  The displacement sensor 12 detects the electric charges generated by the bending of the piezoelectric films 350 and 360 when the user displaces the piezoelectric films 350 and 360 by twisting or bending of the housing 100, and this detection is performed. A signal based on this is output to the displacement state detection unit 14.

  As shown in FIG. 7, the displacement sensor 12 and the touch sensor 13 having the above-described configuration are connected to each circuit in the subsequent stage.

  2 to 7, the display device 1 includes a displacement sensor 12, a touch sensor 13, a displacement state detection unit 14, a touch position detection unit 15, a control unit 16, a storage unit 21, a RAM 22, a display unit 30, and wireless communication. A LAN communication unit 60 and a battery 70 are provided.

  The storage unit 21 is configured by a flash memory, for example. The storage unit 21 stores a control program in which a control method for each unit of the display device 1 is described. A plurality of application software including electronic book display application software (hereinafter referred to as an electronic book app) and photo display application software (hereinafter referred to as a photo display app) to be described later is installed in the control program. Has been.

  The control unit 16 is configured by a CPU, for example. In addition, the control unit 16 has a timer circuit that measures the current time and the current date. The control unit 16 controls the operation of each unit of the display device 1 according to a control program stored in the storage unit 21. The control unit 16 expands data processed by the control program in the RAM 22.

  The display device 1 includes a physical end key (not shown) that ends the activated application software.

  The wireless LAN communication unit 60 has an antenna (not shown). The wireless LAN communication unit 60 communicates with a server device (not shown) via a wireless LAN router connected to the Internet.

  The battery 70 supplies DC operating power to each unit of the display device 1.

Bending displacement sensor 35 of the displacement sensor 12, the detection voltage _{V M} output from the piezoelectric film 350, that is, the voltage _{V M} generated between the electrodes 351 and 352 by the displacement of the piezoelectric film 350, and outputs to the displacement state detection unit 14.

Further, the torsional displacement sensor 36 of the displacement sensor 12 outputs the detection voltage V _W output from the piezoelectric film 360, that is, the voltage V _W generated between the electrodes 361 and 362 due to the displacement of the piezoelectric film 360 to the displacement state detection unit 14. To do.

Although details will be described later, the detection voltages V _M and V _W have a voltage distribution corresponding to the displacement state of the piezoelectric films 350 and 360 (see FIG. 12 described later). Thus, the displacement state detection unit 14 detects the displacement state from the voltage distribution of the detection voltage V _M, V _W. The displacement state detection unit 14 outputs the detection result of the displacement state to the control unit 16.

  On the other hand, each segment electrode 401 and each common electrode 402 of the touch sensor 13 are connected to the touch position detection unit 15. The touch position detection voltage detected by the touch sensor 13 is output to the touch position detection unit 15. The touch position detection unit 15 detects the touch position on the operation surface from the combination of the segment electrode 401 and the common electrode 402 where the touch position detection voltage is detected. The touch position detection unit 15 outputs the touch position detection result to the control unit 16.

  The control unit 16 analyzes the operation content using at least one of the displacement state detection result and the touch position detection result. The control unit 16 generates image data based on the analyzed operation content and outputs it to the display unit 30.

  The display unit 30 displays an image on the operation surface 101 based on the image data.

  Next, a method for detecting bending and twisting of the housing 100 will be described in more detail. FIG. 8 is a side view of the state before the casing 100 is bent. FIG. 9 is a side view of the housing 100 in a bent state. FIG. 9 shows a case where the case 100 is bent along the longitudinal direction. 8 and 9, the upper side of the figure corresponds to the operation surface 101 side of the display device 1.

  On the other hand, FIG. 10 is a perspective view of a state before the housing 100 is twisted. FIG. 11 is a perspective view of the housing 100 in a twisted state. FIG. 12 is a diagram illustrating voltage distribution examples in a bent state and a twisted state of the housing 100 illustrated in FIG.

  8 to 11, the structure of the display device 1 is simplified for easy understanding of the drawings and the principle. FIGS. 10 and 11 illustrate a case where the end side AB serving as one end in the longitudinal direction of the casing 100 (base substrate 501) is a fixed end side and the end side CD serving as the other end is twisted. In other words, the corners A and B that are both ends of the fixed end AB are fixed corners, and the corners C and D that are both sides of the end CD are on the operation surface 101 of the display device 1. A case is shown in which they are displaced in directions substantially perpendicular to each other and in opposite directions.

(Bending displacement detection)
As shown in FIG. 8, when the bending displacement is 0, that is, when an external force that causes bending is not applied to the housing 100, the housing 100, the touch panel 10, and the base substrate 501 have flat main surfaces. It becomes a state.

In this case, the piezoelectric film 350 of the displacement sensor 12 does not expand and contract, and the output voltage from the displacement sensor 12 does not change due to bending displacement. For example, if the detection voltage is set to 0 [V] in this state, the detection voltage V _M output from the bending displacement sensor 35 and the detection voltage V _W output from the torsional displacement sensor 36 are all 0 [V].

And when the external force which produces a bending with respect to the housing | casing 100 is added as shown in FIG. 9, the housing | casing 100, the touch panel 10, and the base substrate 501 will curve along a longitudinal direction. In this case, the piezoelectric film 350 of the displacement sensor 12 expands or contracts depending on the surface on which the displacement sensor 12 is attached to the base substrate 501 and the bending direction. Thereby, a change arises in the voltage output from the displacement sensor 12 by bending displacement. Sensing the voltage V _M is, for example, then changes as shown.

If the bending displacement is + a, from the relationship between the uniaxial stretching direction 901 and the bending direction (the longitudinal direction of the housing 100), as shown in FIG. 12, the detection voltage _{V M} is a voltage value + Va.

If bending displacement + b (<+ a), as shown in FIG. 12, the detection voltage _{V M} is a voltage value + Vb (<+ Va). Here, + Va and + Vb have a relationship of 0 <+ _Vth1 <+ Vb <+ _Vth2 <+ Va when + _Vth1 and + _Vth2 are set as predetermined thresholds.

If the bending displacement of -a, i.e., if the bending deflection is the same bending amount + a direction opposite, as shown in FIG. 12, the detection voltage V _M is a voltage value -Va.

Bending displacement -b - For (> a), i.e., if the bending deflection is the same bending amount + b and reverse, the detection voltage _{V M,} the voltage value -Vb - a (> Va). Similarly, the relationship between these values is 0> −V _th1 >−Vb> −V _th2 > −Va.

Thus, in the configuration of the present embodiment, with respect to the bending displacement, the detection voltage V _M becomes substantially the same voltage value corresponding to the amount of bending.

Therefore, the displacement state detection unit 14 can detect the bending direction and the bending amount by measuring the values of the detection voltages V _M and V _W.

(Torsion displacement detection)
As shown in FIG. 10, when the torsional displacement is 0, that is, when an external force that causes torsion is not applied to the housing 100, the main surface of the housing 100, the touch panel 10, and the base substrate 501 is flat. It becomes a state.

In this case, the piezoelectric film 360 of the displacement sensor 12 does not expand and contract, and the output voltage from the displacement sensor 12 does not change due to torsional displacement. For example, if the detection voltage is set to 0 [V] in this state, the detection voltage V _M output from the bending displacement sensor 35 and the detection voltage V _W output from the torsional displacement sensor 36 are all 0 [V].

  11, when an external force that causes twisting is applied to the housing 100, the displacement corner C and the displacement corner D are displaced in the housing 100, the touch panel 10, and the base substrate 501. In a direction orthogonal to the previous main surface and in a different direction with respect to the main surface.

In this case, the piezoelectric film 360 of the displacement sensor 12 partially extends or contracts depending on the surface on which the displacement sensor 12 is attached to the base substrate 501 and the twisting direction. As a result, a change occurs in the voltage output from the displacement sensor 12 due to torsional displacement. More specifically, the twisted state, the detection voltage V _W, for example, then changes as shown.

When the twist displacement is + c (when the corner C is displaced above the operation surface 101 and the corner D is displaced below the operation surface 101 as shown in FIG. 11), the uniaxial stretching direction 903 and the twist direction the relationship between, as shown in FIG. 12, the detection voltage V _W is a voltage value + Vc.

If torsional displacement is + d (<+ c), as shown in FIG. 12, the detection voltage _{V W} is a voltage value + Vd (<+ Vc). Here, + Vc and + Vd have a relationship of 0 <+ V _th3 <+ Vd <+ V _th4 <+ Vc, where + V _th3 and + V _th4 are predetermined threshold _values .

If torsional displacement of -c, i.e., if the twist displacement is the same twisting amount + c direction opposite, as shown in FIG. 12, the detection voltage V _W is the voltage value -Vc.

For - (c>), i.e., if the twist displacement is the same twisting amount + d and opposite direction, as shown in FIG. 12, the detection voltage _{V W} is a voltage value -Vd (> - twist displacement -d Vc ) Similarly, the relationship between these values is 0> −V _th3 >−Vd> −V _th4 > −Vc.

Therefore, the displacement state detection unit 14 can detect that the housing 100 is twisted by observing the voltage distribution of the detection voltages V _M and V _W. Moreover, the displacement state detection part 14 can detect the twist direction and the twist amount by measuring the voltage value at this time. Then, the displacement state detection unit 14 outputs the detection result of the displacement state to the control unit 16.

  As described above, by using the configuration of the present embodiment, the user not only performs a touch operation on the operation surface 101 but also displaces (bends and twists) the housing 100 to provide a variety of intuitive input operations. Can be performed on the display device 1.

  Next, an operation performed by the control unit 16 during execution of the electronic book app will be described.

  FIG. 13 is a diagram illustrating a relationship between a displacement state and display processing in the electronic book app. FIG. 14 is a flowchart illustrating an operation performed by the control unit 16 illustrated in FIG. 7 during execution of the electronic book app.

  In the electronic book app, display processing as shown in FIG. 13 is assigned to each displacement state described above. That is, in the electronic book app, display processing as shown in FIG. 13 is assigned to each input operation performed by the user on the housing 100.

  When the user touches the icon of the electronic book app among the plurality of application software icons displayed on the operation surface 101, the control unit 16 activates the electronic book app (S1).

  When the electronic book app is activated, the control unit 16 instructs the display unit 30 to display the first page of the electronic book (S2).

  The first page corresponds to the “first image” of the present invention.

  Then, the control unit 16 determines whether the above-described end key has been operated (S3), whether a twisting operation has been performed (S4), and whether a bending operation has been performed (S5). In S <b> 4 and S <b> 5, the control unit 16 determines based on the displacement state detection result (see FIG. 13) output from the displacement state detection unit 14.

  Note that in S3, S4, and S5, the user holds both ends of the display device 1 in the longitudinal direction with both hands and looks at the first image displayed on the operation surface 101, and performs a bending operation or a twisting operation on the housing 100. A scenario where both hands are used is assumed. In this scene, the user performs a twisting operation on the housing 100 to turn the page of the electronic book, or performs a bending operation on the housing 100 to perform enlargement / reduction on a predetermined page. At this time, the user can change the speed of turning the page by changing the amount of twisting of the housing 100. Further, the user can change the magnification of the page by changing the amount of bending of the housing 100.

  First, when it is determined in S4 that the twist operation has been performed, the control unit 16 determines that the twist direction is “+” based on the displacement state detection result output from the displacement state detection unit 14 (see FIG. 13). Whether it is “−” or not is determined (S6).

  When it is determined that the twist direction is “+”, the control unit 16 determines whether the twist amount is large (+ c) based on the detection result (see FIG. 13) of the displacement state output from the displacement state detection unit 14. Whether it is small (+ d) is determined (S7).

  When determining that the twist amount is small (+ d), the control unit 16 turns the pages of the electronic book one page at a time in the forward direction (that is, in the order of the pages of the electronic book) (S8). Conversely, when determining that the twist amount is large (+ c), the control unit 16 turns the pages of the electronic book in a forward direction (that is, in the order of the pages of the electronic book) by a plurality of pages ( S9).

  On the other hand, when it is determined in S6 that the twist direction is “−”, the control unit 16 has a large twist amount based on the displacement state detection result (see FIG. 13) output from the displacement state detection unit 14 (see FIG. 13). -C) or small (-d) is determined (S10).

  When determining that the twist amount is small (−d), the control unit 16 turns the pages of the electronic book one page at a time in the reverse direction (that is, in the reverse direction to the order of the pages of the electronic book) ( S11). On the other hand, when determining that the twist amount is large (−c), the control unit 16 turns the pages of the electronic book in a reverse direction (that is, in a direction opposite to the order of the pages of the electronic book). (S12).

And the control part 16 determines whether the user complete | finished twist operation with respect to the housing | casing 100 based on the detection result of the displacement state output from the displacement state detection part 14 (S13). When the user finishes the twisting operation on the casing 100, the casing 100 returns to a flat state as shown in FIG. In this case, the detection voltage V _M output from the bending displacement sensor 35 and the detection voltage V _W output from the torsional displacement sensor 36 are all 0 [V]. Therefore, in S13, the control unit 16 confirms whether or not the detection voltage V _M and the detection voltage V _W are all 0 [V], thereby determining whether or not the user has finished the twisting operation on the housing 100. Determine.

  If it is determined that the user has not finished the twisting operation on the casing 100 (N in S13), the control unit 16 returns to S6 and continues the process. Here, for example, it is assumed that the user twists the housing 100 small in the + direction and then greatly twists the housing 100 in the + direction.

  On the other hand, when it is determined that the user has finished the twisting operation on the housing 100 (Y in S13), the control unit 16 returns to S3 and continues the processing.

  In S8, S9, S11, and S12, the page that is turned and displayed on the operation surface 101 corresponds to the “second image” of the present invention. However, the page displayed on the operation surface 101 when the twisting operation is completed (Y in S13) corresponds to the “first image” of the present invention.

  Next, when it is determined in S5 that the bending operation has been performed (Y in S5), the control unit 16 performs bending based on the displacement state detection result (see FIG. 13) output from the displacement state detection unit 14. It is determined whether the direction is “+” or “−” (S14).

  If it is determined that the bending direction is “+”, the control unit 16 determines whether the bending amount is large (+ a) based on the displacement state detection result (see FIG. 13) output from the displacement state detection unit 14. It is determined whether it is small (+ b) (S15).

  If it is determined that the amount of bending is small (+ b), the control unit 16 displays the page currently displayed on the operation surface 101 with one level enlarged (S16). On the other hand, when determining that the bending amount is large (+ a), the control unit 16 displays the page currently displayed on the operation surface 101 in the most enlarged manner (S17).

  On the other hand, if it is determined in S14 that the bending direction is “−”, the control unit 16 has a large bending amount based on the displacement state detection result (see FIG. 13) output from the displacement state detection unit 14 (see FIG. 13). Whether it is -a) or small (-b) is determined (S18).

  If it is determined that the bending amount is small (−b), the control unit 16 displays the page currently displayed on the operation surface 101 by reducing it by one level (S19). On the contrary, if it is determined that the bending amount is large (−a), the control unit 16 displays the page currently displayed on the operation surface 101 with the smallest reduction (S20).

And the control part 16 determines whether the user complete | finished bending operation with respect to the housing | casing 100 based on the detection result of the displacement state output from the displacement state detection part 14 (S21). When the user finishes the bending operation on the housing 100, the housing 100 returns to a flat state as shown in FIG. In this case, the detection voltage V _M output from the bending displacement sensor 35 and the detection voltage V _W output from the torsional displacement sensor 36 are all 0 [V]. Therefore, in S21, the control unit 16 confirms whether or not the detection voltage V _M and the detection voltage V _W are all 0 [V], thereby determining whether or not the user has finished the bending operation on the housing 100. Determine.

  If it is determined that the user has not finished the bending operation on the casing 100 (N in S21), the control unit 16 returns to S14 and continues the process. Here, for example, it is assumed that the user bends the housing 100 small in the + direction and then greatly bends it in the + direction.

  On the other hand, if it is determined that the user has finished the bending operation on the casing 100 (Y in S21), the control unit 16 returns to S3 and continues the processing.

  In S16, S17, S19, and S20, the enlarged or reduced page corresponds to the “third image” of the present invention. However, the page displayed on the operation surface 101 when the bending operation is finished (Y in S21) corresponds to the “first image” of the present invention.

  Finally, when the user operates the end key (Y in S3), the control unit 16 ends the electronic book app (S22).

  As described above, in the electronic book app, the user performs not only a touch operation on the operation surface 101 but also a displacement (bending or twisting) of the housing 100 to perform a variety of intuitive input operations on the display device 1. be able to. Therefore, according to the present embodiment, it is possible to realize the display device 1 that can perform a bending operation and a twisting operation, and allows a user to perform a variety of intuitive input operations.

  Next, an operation performed by the control unit 16 during execution of the photo display app will be described.

  FIG. 15 is a diagram showing the relationship between the displacement state and display processing in the photographic display app. FIG. 16 is a flowchart showing an operation performed by the control unit 16 shown in FIG. 7 during execution of the photo display app.

  In the photo display app, display processing as shown in FIG. 15 is assigned to each displacement state described above. That is, in the photo display app, display processing as shown in FIG. 15 is assigned to each input operation performed by the user on the housing 100.

  Further, the processing shown in FIG. 16 is the same as S1, S2, S8, S9, S11, S12, S16, S17, S19, S20, and S22 in FIG. 14 as S201, S202, S208, S209, S211, S212, S216, S217, This is replaced with S219, S220, and S223. Other processes (S3 to S7, S10, S13 to S15, S18, and S21) are the same as the processes shown in FIG.

  When the user touches a photo display app icon among a plurality of application software icons displayed on the operation surface 101, the control unit 16 activates the photo display app (S201).

  When the photo display app is activated, the control unit 16 instructs the display unit 30 to display the photo with the latest shooting date and time among a plurality of photos managed by the photo display app (S202).

  In addition, the newest photograph of the imaging date corresponds to the “first image” of the present invention.

  Then, the control unit 16 determines whether the above-described end key has been operated (S3), whether a twisting operation has been performed (S4), and whether a bending operation has been performed (S5). In S <b> 4 and S <b> 5, the control unit 16 determines based on the displacement state detection result (see FIG. 13) output from the displacement state detection unit 14.

  In S3, S4, and S5 in the photographic display app, the user performs a twisting operation on the casing 100 to turn the photograph, performs a bending operation on the casing 100, and enlarges or reduces the predetermined photograph. It is assumed that the scene is performed. At this time, the user can change the speed of turning the photograph by changing the amount of twisting of the housing 100. Furthermore, the user can change the magnification of the photograph by changing the amount by which the housing 100 is bent.

  First, when it is determined in S4 that the twisting operation has been performed, the control unit 16 determines that the twisting direction is “+” based on the displacement state detection result (see FIG. 15) output from the displacement state detection unit 14. Whether it is “−” or not is determined (S6).

  If it is determined that the twist direction is “+”, the control unit 16 determines whether the twist amount is large (+ c) based on the detection result (see FIG. 15) of the displacement state output from the displacement state detection unit 14. Whether it is small (+ d) is determined (S7).

  When it is determined that the twist amount is small (+ d), the control unit 16 moves the plurality of photos managed by the photo display app in the forward direction (that is, from the newest photo to the oldest photo). Roll one by one (S208). On the other hand, if it is determined that the amount of twist is large (+ c), the control unit 16 moves a plurality of photos managed by the photo display app in the forward direction (that is, from the new photo with the latest shooting date to the old photo). In the direction), a plurality of sheets are picked up (S209).

  On the other hand, if it is determined in S6 that the twist direction is “−”, the control unit 16 has a large twist amount based on the displacement state detection result (see FIG. 15) output from the displacement state detection unit 14 (see FIG. 15). -C) or small (-d) is determined (S10).

  When determining that the twist amount is small (−d), the control unit 16 reverses the plurality of photos managed by the photo display app (that is, from the oldest photo to the newest photo). Roll one by one (S211). On the other hand, if it is determined that the twist amount is large (−c), the control unit 16 moves the plurality of photos managed by the photo display app in the reverse direction (that is, from the old photo with the latest shooting date to the new photo). In the direction), a plurality of sheets are rolled up (S212).

  And the control part 16 determines whether the user complete | finished twist operation with respect to the housing | casing 100 based on the detection result of the displacement state output from the displacement state detection part 14 (S13).

  If it is determined that the user has not finished the twisting operation on the casing 100 (N in S13), the control unit 16 returns to S6 and continues the process. On the other hand, when it is determined that the user has finished the twisting operation on the housing 100 (Y in S13), the control unit 16 returns to S3 and continues the processing.

  In S208, S209, S211, and S212, the photo that is rolled up and displayed on the operation surface 101 corresponds to the “second image” of the present invention. However, the photograph displayed on the operation surface 101 when the twisting operation is completed (Y in S13) corresponds to the “first image” of the present invention.

  Next, when it is determined in S5 that the bending operation has been performed, the control unit 16 determines that the bending direction is “+” based on the displacement state detection result (see FIG. 15) output from the displacement state detection unit 14. Or “−” is determined (S14).

  If it is determined that the bending direction is “+”, the control unit 16 determines whether the bending amount is large (+ a) based on the displacement state detection result (see FIG. 15) output from the displacement state detection unit 14. It is determined whether it is small (+ b) (S15).

  If it is determined that the amount of bending is small (+ b), the control unit 16 displays the photograph currently displayed on the operation surface 101 in one step enlarged (S16). On the contrary, if it is determined that the bending amount is large (+ a), the control unit 16 displays the photograph currently displayed on the operation surface 101 in the most enlarged manner (S17).

  On the other hand, if it is determined in S15 that the bending direction is “−”, the control unit 16 has a large bending amount based on the displacement state detection result (see FIG. 15) output from the displacement state detection unit 14 (see FIG. 15). Whether it is -a) or small (-b) is determined (S18).

  If it is determined that the amount of bending is small (−b), the control unit 16 reduces and displays the photograph currently displayed on the operation surface 101 by one step (S19). On the contrary, if it is determined that the bending amount is large (−a), the control unit 16 displays the photograph currently displayed on the operation surface 101 with the smallest reduction (S20).

  And the control part 16 determines whether the user complete | finished bending operation with respect to the housing | casing 100 based on the detection result of the displacement state output from the displacement state detection part 14 (S21).

  If it is determined that the user has not finished the bending operation on the casing 100 (N in S21), the control unit 16 returns to S14 and continues the process. On the other hand, if it is determined that the user has finished the bending operation on the casing 100 (Y in S21), the control unit 16 returns to S3 and continues the processing.

  In S216, S217, S219, and S220, the enlarged photo or the reduced photo corresponds to the “third image” of the present invention. However, the photograph displayed on the operation surface 101 when the bending operation is completed (Y in S21) corresponds to the “first image” of the present invention.

  Finally, when the user operates the end key (Y in S3), the control unit 16 ends the photo display app (S223).

  As described above, in the photo display app, the user performs not only a touch operation on the operation surface 101 but also a displacement (bending or twisting) of the housing 100 to perform a variety of intuitive input operations on the display device 1. be able to. Therefore, according to the present embodiment, it is possible to realize the display device 1 that can perform a bending operation and a twisting operation, and allows a user to perform a variety of intuitive input operations.

  In the electronic book app of the present embodiment, the display process as shown in FIG. 13 is assigned to each displacement state described above, but the present invention is not limited to this. In implementation, different display processing may be assigned to each displacement state described above.

  For example, a display process for displaying the last page of the electronic book may be assigned to the twist (+ c) instead of the display process for turning pages several pages in the forward direction. The same display process may be assigned to twist (+ c) and twist (+ d), and the same display process is assigned to bend (+ a) and bend (+ b). Also good.

  Similarly, in the photo display app of the present embodiment, the display process as shown in FIG. 15 is assigned to each displacement state described above, but the present invention is not limited to this. In implementation, different display processing may be assigned to each displacement state described above.

  For example, instead of the display process of rolling several photos in the forward direction, a display process for displaying a photograph with the oldest imaging date and time may be assigned to twist (+ c). The same display process may be assigned to twist (+ c) and twist (+ d), and the same display process is assigned to bend (+ a) and bend (+ b). Also good.

  In the present embodiment, each display process of the electronic book app and the photo display app is assigned to each displacement state described above, but the present invention is not limited to this. At the time of implementation, each display process of different application software (for example, game app, camera app, etc.) may be assigned to each displacement state described above.

  Finally, the description of each of the embodiments should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above embodiments but by the claims. Furthermore, the scope of the present invention is intended to include all modifications within the meaning and scope equivalent to the scope of the claims.

DESCRIPTION OF SYMBOLS 1 ... Display apparatus 10 ... Touch panel 12 ... Displacement sensor 13 ... Touch sensor 14 ... Displacement state detection part 15 ... Touch position detection part 16 ... Control part 21 ... Memory | storage part 22 ... RAM
DESCRIPTION OF SYMBOLS 30 ... Display part 35 ... Bending displacement sensor 36 ... Twist displacement sensor 41A, 41B, 42A, 42B ... External connection terminal 52 ... Control circuit module 60 ... Wireless LAN communication part 70 ... Battery 100 ... Case 101 ... Operation surface 131 ... Insulation Substrate 301 ... liquid crystal panel 302 ... front polarizing plate 303 ... back polarizing plate 304 ... backlight 350 ... piezoelectric film 351, 352 ... electrode 360 ... piezoelectric film 361, 362 ... electrode 401 ... segment electrode 402 ... common electrode 500 ... insulating film 501: Base substrates 502, 503 ... Protective film 901 ... Uniaxial stretching direction 903 ... Uniaxial stretching direction

When the detection unit detects either bending or twisting of the housing during execution of the application software, the control unit determines whether the bending direction or twisting direction of the housing is “+” or “−”. If it is determined to be “+”, display processing is performed to display a second image that operates in the forward direction on the display unit . If it is determined to be “−” , the display is performed in the direction opposite to the forward direction. Display processing for displaying the operating third image on the display unit is performed. The second image is different from the first image. The third image is different from both the first image and the second image.

In this configuration, during execution of the application software, the user performs a bending operation or a twisting operation on the casing while viewing the first image displayed on the display unit. When the user performing one of twisting operation and the bending operation, the display process of displaying the images on the display unit is performed by the control unit. Further, when the user performing the other one of the twisting operation and the bending operation, the display process of displaying the images on the display unit is performed by the control unit.

The display device of the present invention preferably has the following configuration. The detection unit detects the bending direction of the housing, the bending amount of the housing, the twisting direction of the housing, and the twisting amount of the housing. Control unit, in application software run, when the detection unit detects the twist of the casing, to display processing for displaying the images on the display unit in accordance with the twisting of the direction and the housing twisting of the housing, the detection when part detects the bending of the housing, it carries out a display process of displaying the images on the display unit in accordance with the bending amount of the bending direction and the housing of the housing.

When performing the user twisting operation, in accordance with the twisting of the direction and the housing twisting of the housing, a display process of displaying a picture image is performed by the control unit. Further, when the user performs a bending operation, in accordance with the bending amount of the bending direction and the housing of the housing, a display process of displaying a picture image is performed by the control unit.

In S8, S9, S11, and S12, the page that is turned in the positive direction and displayed on the operation surface 101 corresponds to the “second image” of the present invention. The page displayed on the screen corresponds to the “third image” of the present invention . However, the page displayed on the operation surface 101 when the twisting operation is completed (Y in S13) corresponds to the “first image” of the present invention.

In S16, S17, S19, and S20, the enlarged page corresponds to the “second image” of the present invention, or the reduced page corresponds to the “third image” of the present invention. However, the page displayed on the operation surface 101 when the bending operation is finished (Y in S21) corresponds to the “first image” of the present invention.

Note that in S208, S209, S211, and S212, the photograph that is turned in the positive direction and displayed on the operation surface 101 corresponds to the “second image” of the present invention, and is turned in the negative direction and operated on the operation surface 101. The photograph displayed on the screen corresponds to the “third image” of the present invention . However, the photograph displayed on the operation surface 101 when the twisting operation is completed (Y in S13) corresponds to the “first image” of the present invention.

In S216, S217, S219, and S220, the enlarged photo corresponds to the “second image” of the present invention, or the reduced photo corresponds to the “third image” of the present invention. However, the photograph displayed on the operation surface 101 when the bending operation is completed (Y in S21) corresponds to the “first image” of the present invention.

Claims (8)

A display unit;
A control unit that executes application software for displaying the first image on the display unit,
A housing,
A detector that individually detects bending and twisting of the housing,
The control unit displays a second image different from the first image on the display unit when the detection unit detects either bending or twisting of the housing during execution of the application software. When a display process is performed and the detection unit detects one of bending and twisting of the housing, a third image different from both the first image and the second image is displayed on the display unit. A display device that performs display processing. The detection unit detects a bending direction of the housing, a bending amount of the housing, a twisting direction of the housing, and a twisting amount of the housing,
The control unit displays the second image according to a twist direction of the housing and a twist amount of the housing when the detecting unit detects the twist of the housing during execution of the application software. When the detection unit detects bending of the casing, the third image is displayed on the display unit according to the bending direction of the casing and the bending amount of the casing. The display device according to claim 1, wherein display processing is performed. The application software is application software for displaying electronic books,
When the detection unit detects twisting of the housing during execution of the application software, the control unit moves in a page direction according to the twisting direction of the housing, and according to the twist amount of the housing. When the detection unit detects the bending of the housing, the page is turned in the enlargement / reduction direction according to the bending direction of the housing and the magnification according to the bending amount of the housing. The display device according to claim 2, wherein the display device is enlarged or reduced.   The display device according to any one of claims 1 to 3, wherein the display device is a portable terminal. An operation surface on which the first image, the second image, or the third image is displayed by the display unit;
The display device according to claim 1, further comprising: a touch sensor that detects an operation position on the operation surface.   The display device according to claim 1, wherein the detection unit includes a piezoelectric film formed of a chiral polymer.   The display device according to claim 6, wherein the chiral polymer is polylactic acid.   The display device according to claim 7, wherein the polylactic acid is L-type polylactic acid.

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