JP5330043B2 - Image display device and control method of image display device - Google Patents

Description

  The present invention relates to an image display device that displays an image and a method for controlling the image display device.

  2. Description of the Related Art Conventionally, in an imaging apparatus, various techniques that enable photographing in water are known. For example, a technique has been disclosed in which an imaging device is provided with an underwater detection unit that detects underwater, and the imaging mode is changed when it is detected underwater (see, for example, Patent Documents 1 and 2). ).

  In this technique, there is a problem that the imaging apparatus is increased in size due to the provision of the underwater detection means, and costs are increased. In order to solve this problem, the underwater detection means is provided in a device (for example, a divers watch) different from the image pickup device, and it is determined that the device is underwater by connecting the other device to the image pickup device. A technique is disclosed (see, for example, Patent Document 3).

Japanese Patent Laid-Open No. 8-184888 Japanese Patent Laid-Open No. 6-351025 JP 2003-233115 A

  However, in the conventional technique described in Patent Document 3 described above, a device different from the image pickup device is required, so that the configuration has to be complicated, and the image pickup device can be freely moved by connection with another device. There was a problem that it could not be made.

  The present invention has been made in view of the above, and has a configuration that is simple and has no restriction on movement without increasing the size of the device, and can accurately detect that the device is underwater. An object of the present invention is to provide a method for controlling an image display device.

  In order to solve the above-described problems and achieve the object, an image display device according to the present invention includes a display unit that displays information including an image, a position provided on the surface of the display unit, and a position pressed from the outside. An input detection unit that detects an input of a signal according to pressure, and when detecting an input of a signal having a substantially uniform pressure in a predetermined region of the input detection unit, the input detection unit is determined to be located in water And an underwater determination unit.

  In the image display device according to the present invention, in the above invention, when the underwater determination unit determines that the input detection unit is located in water, the input of the operation signal from the input detection unit is not permitted. An input setting unit for performing the above is provided.

  In the image display device according to the present invention, in the above invention, when the underwater determination unit continuously detects a signal having a substantially uniform pressure in the region a plurality of times, the input detection unit is underwater. It is characterized by determining that it is located.

  In the image display device according to the present invention as set forth in the invention described above, the area is an entire area in which signal input can be detected by the input detection unit.

  Moreover, the image display apparatus according to the present invention is characterized in that, in the above invention, a water depth determination unit that determines a water depth when the input detection unit is in water is provided.

  Moreover, the image display device according to the present invention is characterized in that, in the above invention, the underwater determination unit lengthens a determination cycle of underwater determination when the water depth determined by the water depth determination unit is equal to or greater than a predetermined value. .

  In the image display device according to the present invention as set forth in the invention described above, the input detection unit is provided in a region different from the operation signal detection unit that detects the input of the operation signal and the operation signal detection unit, and the input detection unit An underwater / water depth determination signal detection unit that detects an underwater / water depth determination signal used for underwater determination and depth determination of the water portion.

  The image display device according to the present invention is characterized in that, in the above-described invention, the image display device includes an imaging unit that images a subject and generates electronic image data of the captured subject.

  In addition, the image display device control method according to the present invention includes a display unit that displays information including an image, and an input that is provided on the display unit and that detects the input position and pressure of a signal due to external pressure. A control unit for detecting an input of a signal having a substantially uniform pressure in a predetermined region of the input detection unit. Then, it is determined that it is determined.

  According to the present invention, it is possible to determine whether or not the input detection unit is located in water without adding a configuration to the image display device or providing an underwater determination function in another device. Therefore, it is possible to accurately detect that the apparatus is located in water without having to increase the size of the apparatus and having a simple configuration without restrictions on movement.

FIG. 1 is a block diagram showing a configuration of an image display apparatus according to Embodiment 1 of the present invention. FIG. 2 is a diagram showing a configuration of a main part of the touch panel of the image display apparatus according to Embodiment 1 of the present invention. FIG. 3 is a diagram schematically illustrating an outline of the pressing position specifying process on the touch panel of the image display device according to the first embodiment of the present invention. FIG. 4 is a diagram showing the detection result of the pressed position and pressure on the touch panel of the image display device according to Embodiment 1 of the present invention. FIG. 5 is a diagram showing a node detection state when the touch panel of the image display apparatus according to Embodiment 1 of the present invention is located on the ground. FIG. 6 is a diagram showing a node detection state when a part of the touch panel of the image display apparatus according to Embodiment 1 of the present invention is located in water. FIG. 7 is a diagram illustrating a node detection state when the image display device according to Embodiment 1 of the present invention is located in the touch panel water. FIG. 8 is a flowchart showing an outline of underwater determination processing performed by the image display apparatus according to Embodiment 1 of the present invention. FIG. 9 is a diagram schematically showing another aspect (first example) of underwater determination on the touch panel of the image display device according to Embodiment 1 of the present invention. FIG. 10 is a diagram schematically showing another aspect (second example) of underwater determination on the touch panel of the image display device according to Embodiment 1 of the present invention. FIG. 11 is a diagram schematically showing another aspect (third example) of underwater determination on the touch panel of the image display device according to Embodiment 1 of the present invention. FIG. 12 is a diagram schematically showing another aspect (fourth example) of underwater determination on the touch panel of the image display device according to Embodiment 1 of the present invention. FIG. 13 is a block diagram showing a configuration of an image display apparatus according to Embodiment 2 of the present invention. FIG. 14 is a diagram schematically showing a configuration of nodes in the touch panel of the image display apparatus according to Embodiment 2 of the present invention. FIG. 15 is a diagram showing the relationship between the water depth and the node detection status when the image display apparatus according to Embodiment 2 of the present invention is in water. FIG. 16 is a flowchart showing an outline of underwater determination processing performed by the image display device according to Embodiment 2 of the present invention. FIG. 17 is a diagram schematically showing a classification of detection contents on the touch panel of the image display device according to Embodiment 2 of the present invention. FIG. 18 is a flowchart showing an outline of underwater determination processing performed by the image display device according to Embodiment 3 of the present invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to the accompanying drawings.

(Embodiment 1)
FIG. 1 is a block diagram showing a configuration of an image display apparatus according to Embodiment 1 of the present invention. The image display apparatus according to the first embodiment is an imaging apparatus having a function of imaging a subject in addition to a function of displaying an image. An imaging apparatus 1 shown in FIG. 1 collects light from a subject included in a predetermined field of view and generates digital image data from an image signal obtained by photoelectrically converting the collected light. 2, an image processing unit 3 that performs image processing on image data generated by the imaging unit 2, an input key 4 that receives an input of an operation signal of the imaging device 1 including a release signal, and an input by a tap operation A tap input unit 5, a display unit 6 that displays an image corresponding to the image data processed by the image processing unit 3, and a display unit 6 that is stacked on the display unit 6, and inputs signals in response to external pressure. A touch panel 7 that is an input detection unit that receives the image, a touch panel drive unit 8 that drives the touch panel 7, a storage unit 9 that stores various types of information including image data of an image captured by the imaging unit 2, and an input key. And a control unit 10 for controlling the operation of the imaging apparatus 1, from 4 or tap input unit 5 according to the input signal.

  The imaging unit 2 includes one or a plurality of lenses, and includes an optical system that collects light from a subject existing in a predetermined visual field area, a diaphragm that adjusts the amount of incident light collected by the optical system, and a release. An image sensor such as a CCD (Charge Coupled Device) that receives the light that has passed through the shutter and the shutter, and operates according to the signal, and converts it into an electrical signal, and an analog signal output from the image sensor is amplified and white balanced And a signal processing circuit that generates digital image data by performing A / D conversion after performing signal processing such as the above.

  The input key 4 is a power button of the image pickup apparatus 1, a release button for inputting a release signal for giving an image pickup instruction, a button for adjusting zoom and exposure at the time of shooting, and switching of various operation modes that can be set by the image pickup apparatus 1. A mode switching button to perform, a control button including an instruction to reproduce and edit image data, and the like.

  The tap input unit 5 includes an acceleration sensor 51 that detects the acceleration of the imaging device 1 when the imaging device 1 moves by a tap operation.

  The display unit 6 is realized by using a display panel made of liquid crystal, plasma, organic EL (Electro Luminescence), or the like, and appropriately displays operation information of the imaging apparatus 1 and information related to photographing in addition to image data.

  FIG. 2 is a diagram illustrating a configuration of a main part of the touch panel 7. The touch panel 7 is a capacitive touch panel, and includes a plurality of strip-shaped traces 71 arranged in parallel to each other, a plurality of strip-shaped traces 72 arranged in parallel in a direction orthogonal to the trace 71, and between the trace 71 and the trace 72. And a plate-like dielectric 73 interposed therebetween. The traces 71 and 72 are realized by a transparent thin film conductor such as indium tin oxide (ITO), conductive transparent polymer, or antimony tin oxide (ATO). Metal traces 74 and 75 are provided, respectively. Among the traces 71 and 72, the trace 71 located on the surface side of the imaging device 1 is provided on the upper substrate 76 made of a flexible material such as PET (Polyethylene Terephthalate) and is opposed to the display unit 6. The surface of the trace 72 located on the side is provided on a lower substrate 77 made of a material such as glass. The traces 71 and 72 and the dielectric 73 are sandwiched between the upper substrate 76 and the lower substrate 77. The metal traces 74 and 75 are electrically connected to the touch panel drive unit 8 and the control unit 10 via a connector (not shown).

  At the position where the trace 71 and the trace 72 overlap vertically, the traces 71 and 72 are capacitively coupled to form two electrodes. Hereinafter, the position where two electrodes are formed overlapping each other is referred to as a “node”. FIG. 3 is a diagram schematically illustrating an outline of the pressing position specifying process on the touch panel 7. When the pressed position on the touch panel 7 is detected, an AC voltage having a specific frequency is applied to one trace 71 for stimulation, while the other trace 71 is held at a power supply voltage (DC voltage) level. As a result, a capacitance associated with the AC voltage is generated on the touch panel 7. The pressing position and pressure by a conductive object such as a finger from the outside can be detected as a change in capacitance. In the case shown in FIG. 3, a situation is shown in which, as a result of applying an AC voltage to the trace 71 in the first row, a node in the third column has detected pressing (the node that has detected pressing is indicated by a black circle). ).

  The touch panel drive unit 8 can detect the pressed position and pressure on the touch panel 7 by scanning all the nodes while stimulating all the traces 71 one by one. FIG. 4 is a diagram showing detection results of the pressed position and pressure on the touch panel 7, and is a diagram showing results detected corresponding to the configuration shown in FIG. In FIG. 4, only the node n in the first row and the third column detects the pressure, while the other nodes n do not detect the pressure. The details of the configuration of the touch panel 7 and its detection principle are disclosed in, for example, Japanese Patent Application Laid-Open No. 2008-31081.

  Hereinafter, with reference to FIGS. 5-7, the change of the detection condition of the press in the node n at the time of putting the imaging device 1 in water is demonstrated. FIG. 5 is a diagram illustrating a state in which the imaging apparatus 1 is placed on the ground and a detection state of the pressing of the node n in that state. FIG. 6 is a diagram illustrating a state in which a part of the imaging device 1 is placed in the water W and a detection state of the node n in that state. FIG. 7 is a diagram illustrating a state where the entire imaging apparatus 1 is placed in the water W and a detection state of the node n in that state. 5 to 7, it is assumed that nothing is touched on the touch panel 7.

  In FIG. 5, since the imaging device 1 is on the ground, the touch panel 7 does not detect pressing. On the other hand, in FIG. 6, since a part of the imaging device 1 is in the water W, there is a node n (indicated by a black circle) for detecting the pressure. In FIG. 7, since the imaging device 1 is in the water W, all the nodes n of the touch panel 7 detect pressing. In this way, it is possible to determine whether or not the imaging device 1 is in water according to the pattern of the node n that has detected a press on the touch panel 7.

  The storage unit 9 is realized by using a semiconductor memory such as a flash memory or a RAM (Random Access Memory) that is fixedly provided inside the imaging device 1, stores the determination result in the underwater determination unit 101, and the imaging device 1. Various programs including the control program are stored.

  When the control unit 10 determines that the imaging apparatus 1 is underwater according to a signal input from the touch panel 7 and the underwater determination unit 101 determines that the underwater determination unit 101 is underwater, And an input setting unit 102 for disallowing the input of the operation signal. More specifically, the underwater determination unit 101 determines that it is underwater when it detects an input of a substantially uniform pressure signal in a predetermined area of the touch panel 7. The control unit 10 having the above functional configuration is realized using a CPU (Central Processing Unit) or the like, and is connected to each component of the imaging device 1 via a bus line.

  FIG. 8 is a flowchart illustrating an outline of the underwater determination process performed by the imaging apparatus 1. First, the underwater determination unit 101 acquires the state of the touch panel 7 (step S1), and determines whether the touch panel 7 is underwater (step S2). In the first embodiment, as shown in FIG. 7, when all nodes n detect a press having a substantially uniform pressure, it is determined that the touch panel 7 is located in water. The determination result by the underwater determination unit 101 is recorded in the storage unit 9 (step S3).

  Subsequently, the underwater determination unit 101 acquires the state of the touch panel 7 at a predetermined timing (step S4), performs underwater determination (step S5), and compares it with the previous determination result stored in the storage unit 9 (step S6). ). If the current determination result is different from the previous determination result (step S7: No), if the current determination result is underwater (step S8: Yes), the control unit 10 does not input an operation signal from the touch panel 7. The permission is set, the brightness of the display unit 6 is lowered, and the underwater mode is set (step S9). On the other hand, if the current determination result is the ground (step S8: No), the control unit 10 permits the input of the operation signal from the touch panel 7, increases the brightness of the display unit 6, and sets to cancel the underwater mode. It performs (step S11).

  Subsequent to step S9 or step S11, the latest determination result is recorded in the storage unit 9 (step S10).

  Thereafter, when the power is turned off (step S12: Yes), the imaging device 1 ends the series of processes, whereas when the power is not turned off (step S12: No), the imaging device 1 returns to step S4.

  In step S7, when the determination result of the underwater determination unit 101 is the same as the previous time (step S7: Yes), the imaging device 1 proceeds to step S12.

  According to the first embodiment of the present invention described above, when the input of a signal having a substantially uniform pressure is detected in a predetermined region of the touch panel 7 provided on the surface of the display unit 6, the touch panel 7 is underwater. The touch panel 7 is located in the water without adding a configuration to the conventional image display device or providing the underwater determination function in another device. Can be determined. Therefore, it is possible to accurately detect that the apparatus is located in water without having to increase the size of the apparatus and having a simple configuration without restrictions on movement.

  When underwater detection is performed with the touch panel 7, it is not always necessary to detect input of a signal having a substantially uniform pressure at all the nodes n of the touch panel 7. For example, when a predetermined ratio of nodes n included in the touch panel 7 detects an input of a signal having a substantially uniform pressure, the underwater determination unit 101 may determine that the touch panel 7 is in water (FIG. 6).

  Further, as shown in FIG. 9, only all nodes n (corresponding to one row of traces 71) arranged in the vicinity of the upper side of the touch panel 7 are scanned, and substantially uniform pressure is applied to all the nodes n in this portion. When the signal is detected, it may be determined that the touch panel 7 is located in water.

  Further, as shown in FIG. 10, it may be determined that the touch panel 7 is located in water when all signals having substantially uniform pressure are detected from the nodes n arranged along the diagonal line of the touch panel 7.

  In addition, as shown in FIG. 11, when nodes n (corresponding to two rows of traces 71) arranged near the upper side and the lower side of the touch panel 7 detect the input of a signal having substantially uniform pressure, the touch panel You may determine that 7 is located in water.

  In addition, as illustrated in FIG. 12, when the node n located near the four corners of the touch panel 7 detects a signal having substantially uniform pressure, the touch panel 7 may be determined to be located in water.

  Similarly to the touch panel 7, any other type of touch panel can be applied as long as it can detect the simultaneous input of a plurality of points.

(Embodiment 2)
FIG. 13 is a diagram showing a configuration of an imaging apparatus (image display apparatus) according to Embodiment 2 of the present invention. The imaging apparatus 11 shown in the figure is the same as the imaging apparatus 1 described above except for the configuration of the touch panel 12 and the control unit 13.

FIG. 14 is a diagram schematically illustrating a configuration of nodes in the touch panel 12. The touch panel 12 has the same configuration as the touch panel 7 described above. The touch panel 12 has different node detection sensitivities depending on the location. Specifically, as shown in FIG. 14, in the longitudinal direction of the trace 71, the detection sensitivity are arranged repeatedly different nodes n _a, n _b, n _c from each other. Each node has different threshold in detecting a pressure, the node n _a is detectable lower limit of the pressure is the smallest, the largest lower limit of the node n _c is capable of detecting pressure.

FIG. 15 is a diagram illustrating the relationship between the water depth when the imaging device 11 is underwater and the signal detection status at the node n. 15, the shallow region D ₁ in the vicinity water surface of water W, only the node n _a detects the pressing. Further, in the deep region D ₂ than the region _{D 1,} nodes n _a, it is n _b to detect the press. Further, in the deep region D ₃ than the region D _2, all the nodes n _a, n _b, n _c detects the pressing. Note that the node n _a has a function of detecting the input of the operation signal.

  The control unit 13 includes a water depth determination unit 131 in addition to the underwater determination unit 101 and the input setting unit 102. The water depth determination unit 131 determines the water depth of the imaging device 11 based on a signal output from the touch panel 12. Therefore, the water depth determination unit 131 determines the water depth of the imaging device 11 based on signals output from the touch panel 12 in accordance with the three states shown in FIG.

  FIG. 16 is a flowchart illustrating an outline of the underwater determination process performed by the imaging device 11. First, the underwater determination unit 101 acquires the state of the touch panel 12 (step S21), and determines whether or not the imaging device is in water (step S22). As a result of the determination, when the imaging device 1 is in water (step S23: Yes), the water depth determination unit 131 determines the water depth of the imaging device 11 (step S24). On the other hand, if the result of determination is that the imaging device 11 is on the ground (step S23: No), the imaging device 11 proceeds to step S25. The determination results by the underwater determination unit 101 and the water depth determination unit 131 are recorded in the storage unit 9 (step S25).

  Subsequently, the underwater determination unit 101 acquires the state of the touch panel 12 at a predetermined timing (step S26), and performs underwater determination (step S27). When the current determination result is underwater (step S28: Yes), the water depth determination unit 131 performs water depth determination (step S29). If the current determination result is not underwater (step S28: No), the process proceeds to step S30 described later.

  Subsequent to step S29, the control unit 13 compares the determination results (underwater / water depth determination result) of the underwater determination unit 101 and the water depth determination unit 131 with the previous determination result (step S30). If the current determination result is different from the previous time (step S31: No), if the current determination result is underwater (step S32: Yes), the control unit 13 disallows operation signal input from the touch panel 12, The brightness of the display unit 6 is lowered to set the underwater mode, which is one of the shooting modes, and the characteristics are switched according to the water depth (step S33). The characteristics referred to here are, for example, the determination cycle of the underwater determination unit 101, a change in display characteristics, the sensitivity of the acceleration sensor 51, and the like. Among these, regarding the determination cycle of the underwater determination unit 101, the determination cycle is lengthened as the water depth increases. As for the display characteristics, as the water depth becomes deeper, the display characteristics appear bluish. Therefore, color correction processing considering this point is automatically performed. Regarding the detection characteristics, the deeper the water depth, the slower the movement when the user taps, so the lower limit value of the acceleration for detecting the tap is made smaller than when the water depth is shallow.

  In step S32, if the current determination result is the ground (step S32: No), the control unit 13 permits input from the touch panel 12, increases the luminance of the display unit 6, and performs setting to cancel the underwater mode. (Step S34).

  After step S33 or S34, the imaging apparatus 11 records the latest determination result in the storage unit 9 (step S35). Thereafter, when the power is turned off (step S36: Yes), the imaging device 11 ends the series of processes. On the other hand, when the power is not turned off (step S36: No), the imaging device 11 returns to step S26.

  Next, the case where the underwater / water depth determination result in step S31 is the same as the previous time (step S31: Yes) will be described. In this case, when the imaging device 11 is underwater (step S37: Yes) and the water depth of the imaging device 11 has changed (step S38: Yes), the control unit 13 performs switching of characteristics according to the water depth (step S38). S39), the process proceeds to step S35. On the other hand, when the imaging device 11 is underwater (step S37: Yes) and the water depth of the imaging device 11 does not change (step S38: No), the imaging device 11 proceeds to step S36. In step S37, when the imaging device 11 is not underwater (step S37: No), the imaging device 11 proceeds to step S36.

  According to the second embodiment of the present invention described above, since the touch panel 12 includes the water depth determining unit 131 that determines the water depth, the characteristics of the imaging device 11 can be changed according to the water depth.

Incidentally, in the touch panel 12, using a portion of the region S ₁ of the touch panel 12 as shown in FIG. 17 for the water / water depth determination, region S ₂ the other may be used as an input. In this sense, the region S ₁ is an underwater / water depth determination signal detection unit, and the region S ₂ is an operation signal detection unit. Thereby, power saving of underwater / water depth determination can be measured.

  Moreover, it is also possible to apply what laminated | stacked several touch panels as what has the same effect as the touch panel 12 mentioned above.

  Further, when the water depth determination is performed with high accuracy, in order to calibrate the error due to the operating environment, for example, the initialization of the pressure detection level of the touch panel 12 is executed after step S21 in FIG. It may be.

(Embodiment 3)
FIG. 18 is a flowchart showing an outline of underwater determination processing performed by the imaging apparatus (image display apparatus) according to Embodiment 3 of the present invention. The configuration of the imaging apparatus according to the third embodiment is the same as the configuration of the imaging apparatus 1 described above. First, the underwater determination unit 101 acquires the state of the touch panel 7 (step S41), and determines whether the imaging device 1 is in water (step S42). The determination result by the underwater determination unit 101 is recorded in the storage unit 9 (step S43). Thereafter, the control unit 10 sets the repeat counter m to zero (step S44).

  Subsequently, the underwater determination unit 101 acquires the state of the touch panel 7 at a predetermined timing (step S45), performs underwater determination (step S46), and compares it with the previous determination result stored in the storage unit 9 (step S47). ). If the current determination result is the same as the previous determination result (step S48: Yes), if the counter m has not reached the predetermined value M (step S49: No), the control unit 10 increases the counter by 1 (step S55). ), The process returns to step S45.

  On the other hand, as a result of the determination in step S47, when the counter m reaches the predetermined value M (step S49: Yes), if the current determination result is underwater (step S50: Yes), the control unit 10 starts from the touch panel 7. The operation signal is not allowed to be input, the brightness of the display unit 6 is lowered, and the underwater mode is set (step S51). On the other hand, if the current determination result is the ground (step S50: No), the control unit 10 permits the input of the operation signal from the touch panel 7, increases the brightness of the display unit 6, and sets to cancel the underwater mode. This is performed (step S52).

  After step S51 or step S52, the imaging apparatus 1 records the latest determination result in the storage unit 9 (step S53). Thereafter, when the power is turned off (step S54: Yes), the imaging apparatus 1 ends the series of processes, whereas when the power is not turned off (step S54: No), the imaging apparatus 1 returns to step S44.

  In step S48, when the determination result of the underwater determination unit 101 is the same as the previous determination result (step S48: No), the imaging device 1 proceeds to step S54.

  According to Embodiment 3 of the present invention described above, when the underwater determination unit 101 continuously detects a signal having a substantially uniform pressure from a predetermined node n a plurality of times, the touch panel 12 is underwater. Since it determines, underwater determination with higher accuracy can be realized.

  In the third embodiment, it is possible to add a water depth determination function similar to that of the imaging device 11 according to the second embodiment described above.

(Other embodiments)
Up to this point, the preferred embodiments for carrying out the present invention have been described. However, the present invention should not be limited only by the above-described three embodiments. For example, the present invention is also applicable to an image display device that does not have an imaging function such as a PDA (Personal Digital Assistant) or a digital photo frame.

  Further, the configuration of the touch panel as the input detection unit applied in the present invention may have a configuration other than that described above.

DESCRIPTION OF SYMBOLS 1,11 Imaging device 2 Imaging part 3 Image processing part 4 Input key 5 Tap input part 6 Display part 7, 12 Touch panel 8 Touch panel drive part 9 Storage part 10, 13 Control part 51 Acceleration sensor 71, 72 Trace 73 Dielectric 74, 75 Metal Trace 76 Upper Substrate 77 Lower Substrate 101 Underwater Determination Unit 102 Input Setting Unit 131 Water Depth Determination Unit S ₁ Underwater / Depth Determination Signal Detection Unit S ₂ Operation Signal Detection Unit W Water

Claims (9)

A display unit for displaying information including an image;
An input detection unit that is provided on the surface of the display unit and detects an input of a signal corresponding to a position and pressure pressed from outside;
An underwater determination unit that determines that the input detection unit is located in water when detecting an input of a signal having a substantially uniform pressure at a plurality of positions in a predetermined region of the input detection unit;
An image display device comprising:   An input setting unit configured to perform setting for disabling input of an operation signal from the input detection unit when the input detection unit is determined to be located in water by the underwater determination unit. 2. The image display device according to 1. The underwater determination unit
3. The image display device according to claim 1, wherein when an input of a signal having a substantially uniform pressure in the region is detected continuously a plurality of times, it is determined that the input detection unit is located in water.   The image display device according to claim 1, wherein the region is an entire region in which signal input can be detected by the input detection unit.   The image display apparatus according to claim 1, further comprising a water depth determination unit that determines a water depth when the input detection unit is in water. The underwater determination unit
The image display device according to claim 5, wherein when the water depth determined by the water depth determination unit is equal to or greater than a predetermined value, the determination cycle for underwater determination is lengthened. The input detection unit
An operation signal detector for detecting an input of the operation signal;
An underwater / water depth determination signal detection unit that is provided in a different area from the operation signal detection unit and detects an underwater / water depth determination signal used for underwater determination and water depth determination of the input detection unit;
The image display device according to claim 5, further comprising: A tap input unit for detecting an input by a tap operation to the image display device;
If the water determination unit determines that located in the water, in any one of claims 5-7, characterized in that to change the detection characteristics of the tap input section according to the water depth in which the water depth determining unit determines The image display device described. A control method for an image display device, comprising: a display unit that displays information including an image; and an input detection unit that is provided on the display unit in a stacked manner and that detects an input position and pressure of a signal due to external pressure. There,
A method for controlling an image display device, comprising: determining that the input detection unit is located in water when detecting an input of a signal having a substantially uniform pressure in a predetermined region of the input detection unit.

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