JP2016099755A - Electronic apparatus and program for changing contact detection sensitivity - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically change contact detection sensitivity of a position detection device that detects a contact position of an object with respect to a contact surface according as to whether or not a user wears gloves.SOLUTION: An electronic apparatus includes: a position detection device that has a plurality of proximity sensors detecting proximity of an object and a plurality of temperature sensors provided in the vicinity of the proximity sensors, and detects a contact position of an object with respect to a contact surface; and a changing part that changes contact detection sensitivity of the position detection device on the basis of a result of comparison between a first temperature detected by a temperature sensor provided in the vicinity of a proximity sensor that has detected proximity of an object and a second temperature detected by a temperature sensor provided in the vicinity of a proximity sensor that has not detected proximity of the object.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an electronic device and a contact detection sensitivity changing program.

  There has been proposed an electronic apparatus including a position detection device that detects contact of an object with a contact surface and detects a contact position of the object. As an example of such a position detection device, there is a so-called capacitive touch panel. Such electronic devices are, for example, smart phones, tablet terminals, portable music playback devices, portable game devices, and mobile phones.

  A capacitive touch panel detects a contact position based on a change in electric field or capacitance generated by proximity or contact of a conductive object (for example, a finger). Therefore, the capacitive touch panel can detect a contact position when a conductive object is lightly touched (also referred to as feather touch). In the following description, the touch panel is a capacitive touch panel unless otherwise specified.

  When a user of an electronic device performs a contact operation on a touch panel in a state where gloves are worn, it becomes difficult for the touch panel to normally detect contact of an object and to normally detect a contact position. The reason why such difficulty occurs is as follows. In other words, because the human body does not directly touch the touch panel due to the gloves, the human body and the touch panel are partially electrically insulated, and further, there is a distance between the human body and the touch panel due to the fabric of the glove and the air layer. This is because the change in electric field and capacitance described above is small.

JP 2009-212719 A JP 2007-27034 A JP 2012-173749 A JP 2008-81896 A JP 2012-173749 A

  If the touch detection sensitivity of the touch panel is increased, the touch panel can normally detect the touch position even if a user wearing gloves performs a touch operation on the touch panel of the electronic device. However, when the touch detection sensitivity of the touch panel is increased and the user of the electronic device touches the touch panel with his bare hands without wearing gloves, the touch panel touches before the finger touches the touch panel. The position may be output. The electronic device may malfunction due to the output of the contact position.

  An object of one aspect of the present embodiment is to automatically change the contact detection sensitivity of a position detection device that detects a contact position of an object with respect to a contact surface according to whether or not a user wears gloves.

In one aspect, there are a plurality of proximity sensors that detect the proximity of an object and temperature sensors provided in the vicinity of the proximity sensor, and a position detection device that detects the contact position of the object with respect to the contact surface;
The first temperature detected by the temperature sensor provided in the vicinity of the proximity sensor that detects the proximity of the object, and the second temperature detected by the temperature sensor provided in the vicinity of the proximity sensor that does not detect the proximity of the object And a changing unit that changes the contact detection sensitivity of the position detection device based on the comparison result with the electronic device.

  According to one aspect, the contact detection sensitivity of the position detection device that detects the contact position of the object with respect to the contact surface can be automatically changed according to whether or not the user wears gloves.

FIG. 1 is a hardware block diagram of the electronic device of the present embodiment. FIG. 2 is an external view of the electronic device 1 of FIG. FIG. 3 is a cross-sectional view of the electronic device 1 of FIG. FIG. 4 is a diagram schematically showing a state where the user is holding the electronic device 1 of FIG. 1 with the right hand. FIG. 5 is a graph showing the relationship between the temperature detected by the temperature sensor and the outside air temperature. FIG. 6 is a software block diagram of the electronic device 1 of FIG. FIG. 7 is a first flowchart for explaining the determination processing of the presence / absence of wearing gloves and the setting processing of contact detection sensitivity, which are executed in the electronic apparatus 1 of FIG. FIG. 8 is a second flowchart for explaining the determination processing of the presence / absence of wearing gloves and the setting processing of contact detection sensitivity, which are executed in the electronic apparatus 1 of FIG. FIG. 9 is a first diagram illustrating various holding methods. FIG. 10 is a second diagram for explaining various holding methods. FIG. 11 is a third diagram for explaining various holding methods. FIG. 12 is a table showing a contact state with the detector.

(Hardware block diagram of electronic equipment)
FIG. 1 is a hardware block diagram of the electronic device of the present embodiment. In the following description of the drawings, the same elements are denoted by the same reference numerals, and the description once made is omitted. The electronic device 1 in FIG. 1 is, for example, a smartphone, a tablet terminal, a portable music playback device, a portable game device, or a mobile phone.

  The electronic device 1 includes a CPU 11, a RAM 12, a ROM 13, a storage device 14, and a wireless communication device 15 connected to the bus B. Furthermore, the electronic device 1 includes a display device 16, a touch panel 17, and a first detector 181 to a fourth detector 184 connected to the bus B. CPU is an abbreviation for “Central Processing Unit”, RAM is an abbreviation for “Random Access Memory”, and ROM is an abbreviation for “Read Only Memory”.

  The CPU 11 is a central processing unit that controls the electronic device 1. The RAM 12 temporarily stores data generated in processing executed by the CPU 11, data generated in each step executed by the control software 100, and the like. The RAM 12 is a semiconductor memory such as a DRAM (Dynamic Random Access Memory). The control software 100 automatically changes the touch detection sensitivity of the touch panel 17 according to whether the user wears gloves. The control software 100 is also called a contact detection sensitivity changing program.

  The CPU 11 reads the execution file of the control software 100 from the storage device 14 when the electronic device 1 is activated, and expands it in the RAM 12. FIG. 3 schematically shows a state in which the CPU 11 develops the control software 100 in the RAM 12.

  The ROM 13 stores various setting information. The storage device 14 is a storage device capable of storing a large amount of data, and is a large-capacity storage device such as a nonvolatile semiconductor memory, for example. For example, the storage device 14 stores an execution file of the control software 100. The wireless communication device 15 is connected to a base station or an access point by wireless communication, and communicates with, for example, a server device connected to the Internet. The wireless communication device 15 may have a so-called telephone function.

  The display device 16 is a device that displays various types of information such as images and characters. The display device 16 is, for example, a device including a liquid crystal display and a liquid crystal display driving device.

  The touch panel 17 is provided on the display surface side of the display device 16. When the user touches the display surface of the display device 16 with a conductive object (for example, a finger), the touch panel 17 provides operation position information indicating the contact position to software (not shown) for the user. Output via. The touch panel 17 is a so-called capacitive touch panel. The touch panel 17 determines the presence or absence of contact according to the set contact detection sensitivity. The touch panel 17 is an example of a position detection device that detects a contact position of an object with respect to a contact surface (see reference numeral 17a in FIG. 2).

  Each of the first detector 181 to the fourth detector 184 includes a proximity sensor that detects the proximity of an object and a temperature sensor provided in the vicinity of the proximity sensor. The first detector 181 includes a first proximity sensor 181a and a first temperature sensor 181b provided in the vicinity of the first proximity sensor 181a. The second detector 182 includes a second proximity sensor 182a and a second temperature sensor 182b provided in the vicinity of the second proximity sensor 182a. The third detector 183 includes a third proximity sensor 183a and a third temperature sensor 183b provided in the vicinity of the third proximity sensor 183a. The fourth detector 184 includes a fourth proximity sensor 184a and a fourth temperature sensor 184b provided in the vicinity of the fourth proximity sensor 184a.

  The first proximity sensor 181a to the fourth proximity sensor 184a detect the proximity of an object to the electronic device 1, and output the detection result. The first proximity sensor 181a to the fourth proximity sensor 184a emit, for example, infrared rays and receive reflected light from the target. Then, the first proximity sensor 181a to the fourth proximity sensor 184a detect the distance from the target based on the intensity of the received reflected light.

  The first temperature sensor 181b to the fourth temperature sensor 184b detect the temperature and output the detection result. Specifically, the temperature sensor detects, for example, the temperature of the housing surface near the temperature sensor.

  As described in FIG. 1, the electronic device 1 includes a plurality of proximity sensors that detect the proximity of an object and a plurality of temperature sensors provided in the vicinity of the proximity sensor.

  The electronic device 1 may be provided with a connection device (not shown) that functions as an interface for connecting to various external devices. The connection device has, for example, a card slot and a USB (Universal Serial Bus) port. The connection device is connected to, for example, an external storage medium (not shown). The external storage medium is a portable nonvolatile storage device such as a USB memory. Note that a configuration may be adopted in which a storage medium reading device (not shown) that reads data stored in the storage medium is connected via a connection device. This storage medium (also called a recording medium) is a portable storage medium such as a CD-ROM (Compact Disc Read Only Memory) and a DVD (Digital Versatile Disc).

(External view of electronic equipment)
FIG. 2 is an external view of the electronic device 1 of FIG. The electronic device 1 described below is, for example, a smartphone. FIG. 2A is a front view, and FIG. 2B is a rear view. 2A shows the contact surface 17a of the touch panel 17, that is, the front surface of the electronic device 1. FIG. The contact surface 17a is also called a display surface. The display device 16 in FIG. 1 displays various information such as images and characters on the contact surface 17a. The user performs a contact operation with the finger or the like on the contact surface 17a. The housing H of the electronic device 1 has a quadrangular shape (for example, a rectangular shape) and has a structure that exposes the contact surface 17a.

  FIG. 2B shows a surface opposite to the contact surface 17a, that is, the back surface of the electronic device 1. The first detector 181 is arranged in the upper right corner of the electronic device 1 in FIG. The second detector 182 is arranged at the upper left corner of the electronic device 1 in FIG. The third detector 183 is arranged at the lower right corner of the electronic device 1 in FIG. The fourth detector 184 is arranged at the lower left corner of the electronic device 1 in FIG.

  FIG. 2B shows the arrangement relationship between the proximity sensor and the temperature sensor provided in the detector. For example, the positional relationship between the first proximity sensor 181a and the first temperature sensor 181b of the first detector 181 is schematically shown in a circle C indicated by a one-dot chain line. The distance between the proximity sensor and the temperature sensor provided in the detector is preferably short, for example, several millimeters.

  The electronic device 1 includes a proximity sensor and a temperature sensor provided in the vicinity of the proximity sensor at any two or more of the four corners of the housing H. That is, the electronic device 1 includes one detector in each of any two or more of the four corners of the housing H.

(Cross section)
FIG. 3 is a cross-sectional view of the electronic device 1 of FIG. FIG. 3 shows a cross section of the electronic device 1 in the vicinity of the first detector 181 and the second detector 182 shown in FIG. This cross section is a cross section in the horizontal direction of the drawing.

  As shown in FIG. 3, a first proximity sensor 181a and a second proximity sensor 182a are arranged on the bottom surface of the housing H of the electronic device 1. Although not shown, the third proximity sensor 183a and the fourth proximity sensor 184a are also arranged on the bottom surface of the housing H of the electronic device 1 in the same manner as the first proximity sensor 181a and the second proximity sensor 182a. Has been.

(Holding electronic device 1)
FIG. 4 is a diagram schematically showing a state where the user is holding the electronic device 1 of FIG. 1 with the right hand. As shown in FIG. 4, the user holds the electronic device 1 with the right hand RH. The user supports the bottom surface of the electronic device 1 with a finger other than the thumb and holds any one corner of the electronic device 1 with a palm. Then, the user operates the contact surface 17a (see FIG. 2) with the thumb.

  As shown in FIG. 4, when the user holds the electronic device 1, the surface of the casing near the fourth detector 184 and the right hand RH of the user come into contact. On the other hand, the housing surface in the vicinity of the first detector 181 to the third detector 183 does not contact the user's right hand RH. That is, the fourth proximity sensor 184a detects the proximity of the object, and the proximity sensors of the first proximity sensor 181a to the third proximity sensor 183a do not detect the proximity of the object. Note that the presence or absence of contact between the surface of the housing near the detector and the user's hand is synonymous with the presence or absence of contact between the detector and the user's hand.

  Now, suppose that a user holds an electronic device while wearing gloves and performs a contact operation. When the user wears gloves, as described above, it becomes difficult for the touch panel to detect the contact of an object normally and to detect the contact position normally.

  Therefore, there is a method for determining whether or not the user is wearing gloves and changing the touch detection sensitivity of the touch panel based on the determination result. When this method determines that the user does not wear gloves, the touch detection sensitivity of the touch panel is set to a sensitivity for non-wearing gloves. On the other hand, if it is determined that the user is wearing gloves, the touch detection sensitivity of the touch panel is set to be higher than the sensitivity for non-wearing gloves.

  In this way, when it is determined that the user is wearing a glove, the touch detection sensitivity of the touch panel is increased so that even if the human body and the touch panel are partially electrically insulated by the glove, the touch panel Detects contact with a high precision.

  As a method for determining the presence / absence of wearing gloves, for example, there is a method for determining that a user is wearing gloves when the outside air temperature of the electronic device is lower than a certain temperature (for example, 5 ° C.). This determination method is based on an empirical rule that the user is likely to wear gloves when the temperature is low.

  However, if the user wants to avoid contact between his / her hand and other objects (including life forms), for example, even if the outside air temperature is about room temperature (for example, 25 ° C.) There is a high possibility of wearing gloves. Such users are health care workers, inspectors, art appraisers, and the like. Thus, when wearing gloves even when the outside air temperature is about room temperature, it is difficult to determine with high accuracy whether or not the user is wearing gloves with the above-described determination method.

(Contact temperature and outside temperature)
Therefore, the electronic device 1 according to the present embodiment determines the presence / absence of wearing gloves with high accuracy by the determination method described in FIG. In the following description, a portion where a user's hand (including a case where gloves are worn) and the housing H (see FIGS. 2 and 3) are referred to as a contact portion as appropriate. And the temperature of this contact part is suitably described as contact part temperature TA. In the following description, the contact temperature of the housing H of the electronic device 1 when a glove is not attached to the hand holding the electronic device 1 will be appropriately described as a non-wearing temperature TA1. In addition, when a glove is attached to the hand holding the electronic device 1, the temperature of the contact portion of the housing H of the electronic device 1 is appropriately described as an attachment temperature TA2.

  There is a difference between the non-mounting temperature TA1 and the mounting temperature TA2. Specifically, when the outside air temperature is the same, the non-wearing temperature TA1 is higher than the wearing temperature TA2. This difference occurs because when the user is not wearing gloves, the skin of the user's hand is in direct contact with the housing, and the user's body temperature is directly conducted to the contact portion. This difference also occurs when gloves are worn, because there is a glove fabric and an air layer between the hand and the glove between the skin of the user's hand and the housing. This is because the user's body temperature is hardly conducted to the contact portion. Since the user's body temperature is hardly conducted to the contact portion, the temperature of the contact portion (that is, the wearing temperature TA2) substantially matches the outside air temperature.

  FIG. 5 is a graph showing the relationship between the temperature detected by the temperature sensor and the outside air temperature. In the graph of FIG. 5, the vertical axis indicates the detected temperature, and the horizontal axis indicates the outside air temperature of the electronic device 1. In FIG. 5, the long dashed line near 36 ° C. indicates the user's body temperature. In FIG. 5, reference numeral TA1 represents a non-mounting temperature, reference numeral TA2 represents a mounting temperature, and reference numeral TB represents a temperature of the non-contact portion.

  In the following description, a portion where the user's hand (including a case where gloves are worn) and the housing are not in contact with each other is referred to as a non-contact portion as appropriate. The temperature of the non-contact part (hereinafter referred to as non-contact part temperature TB as appropriate) is almost the same as the outside air temperature. Specifically, the non-contact part temperature TB and the outside air temperature are almost the same value. Further, the mounting temperature TA2 and the non-contact part temperature TB substantially coincide with each other. For example, when the outside air temperature is 20 ° C., the non-contact portion temperature TB is 20 ° C. according to FIG. The mounting temperature TA2 and the non-contact part temperature TB substantially coincide with each other as described above.

  When the outside air temperature is lower than the body temperature, the body temperature radiates from the user's skin to the outside air, so that the skin surface temperature is lower than the body temperature, but is higher than the outside air temperature. As the outside air temperature decreases, the amount of heat released from the user's skin to the outside air increases. Therefore, when the user's hand and the case are in contact with each other when no gloves are worn, the non-wearing temperature TA1 changes corresponding to the outside air temperature while maintaining a temperature higher than the outside air temperature. . Specifically, the non-mounting temperature TA1 changes as shown in FIG.

  Further, as shown in FIG. 5, when the outside air temperature is the same, the non-wearing temperature TA1 is higher than the wearing temperature TA2. For example, when the outside air temperature is 10 ° C., the non-wearing temperature TA1 is about 10 ° C. higher than the wearing temperature TA2. In FIG. 5, the absolute difference between the non-wearing temperature TA1 and the wearing temperature TA2 is indicated by a temperature difference ΔTD.

  In the example of FIG. 4, the first temperature sensor 181b of the first detector 181; the second temperature sensor 182b of the second detector 182; and the third temperature sensor 183b of the third detector 183. The detected temperature is the non-contact part temperature TB. In the example of FIG. 4, the temperature detected by the fourth temperature sensor 184b of the fourth detector 184 is the contact part temperature TA.

  In the example of FIG. 4, when the user is wearing gloves, the temperature detected by the fourth temperature sensor 184b of the fourth detector 184 is the wearing temperature TA2. In the example of FIG. 4, when the user is not wearing gloves, the temperature detected by the fourth temperature sensor 184b of the fourth detector 184 is the non-wearing temperature TA1.

  In the present embodiment, it is determined whether the user is wearing gloves by using the characteristics of the contact part temperature TA and the non-contact part temperature TB described in FIG. Here, the characteristics will be described. First, an absolute value of a difference between the contact part temperature TA (that is, the non-wearing temperature TA1) and the non-contact part temperature TB (hereinafter referred to as a non-wearing difference value) when the glove is not worn is considered. Then, an absolute difference value between the contact part temperature TA (that is, the attachment temperature TA2) and the non-contact part temperature TB (hereinafter referred to as a difference value at the time of wearing) when wearing gloves is considered.

  As shown in FIG. 5, the non-contact part temperature TB substantially coincides with the outside air temperature, and the non-contact part temperature TB substantially coincides with the mounting temperature TA2. The non-wearing temperature TA1 is higher than the wearing temperature TA2. For example, when the outside air temperature is 10 ° C., the non-wearing temperature TA1 is 20 ° C., which is 10 ° C. higher than the wearing temperature TA2.

  From the above, the non-wearing difference value (temperature difference ΔTD) has a characteristic that it is larger than the wearing difference value. Using such characteristics, the electronic device 1 determines that the glove is worn when the temperature detected by the temperature sensor provided in the vicinity of the proximity sensor that detects the proximity of the object is a value close to the outside air temperature. To do.

Specifically, the electronic device 1 is
｜ Contact part temperature TA−Outside air temperature (Non-contact part temperature TB) | <Temperature judgment threshold ΔTC ... (Formula 1)
If the condition is satisfied, it is determined that the user is wearing gloves.

  The contact part temperature TA is either the non-wearing temperature TA1 or the wearing temperature TA2. Here, the non-contact part temperature TB substantially coincides with the outside air temperature as described with reference to FIG. Therefore, the outside air temperature is regarded as the non-contact part temperature TB. The temperature determination threshold value ΔTC is appropriately determined by various experiments.

  As the temperature determination threshold ΔTC is increased, the temperature variation (also referred to as an error) detected by the temperature sensor can be absorbed. However, according to (Equation 1), when the absolute difference between the contact temperature TA and the outside air temperature (non-contact temperature TB) exceeds the temperature determination threshold ΔTC, it is determined that the gloves are not worn. Therefore, when the temperature determination threshold value ΔTC is increased, the possibility of erroneous determination that the user is wearing a glove increases even when the user is not wearing the glove. Therefore, the temperature determination threshold value ΔTC is set to a value sufficiently smaller than the temperature difference ΔTD.

  Next, the glove wearing determination executed in the electronic device 1 of the present embodiment and the touch detection sensitivity changing process of the touch panel 17 based on the determination result will be described with reference to FIGS.

(Software block diagram)
FIG. 6 is a software block diagram of the electronic device 1 of FIG. In FIG. 6, hardware elements are illustrated for easy understanding. The RAM 12, the touch panel 17, and the first detector 181 to the fourth detector 184, which are hardware elements in FIG. 6, are indicated by alternate long and short dash lines. Although the control software 100 is expanded in the RAM 12 in the example of FIG. 1, the control software 100 is shown outside the RAM 12 to prevent the figure from becoming complicated.

  The control software 100 includes an acquisition unit 101 and a change unit 110. The acquisition unit 101 acquires the detection result of the proximity sensor and the detection result of the temperature sensor output from the first detector 181 to the fourth detector 184, and stores them in the RAM 12.

  The changing unit 110 determines whether the user is wearing gloves, and changes the touch detection sensitivity of the touch panel 17 according to the determination result. The changing unit 110 includes a proximity determining unit 111, an average value calculating unit 112, an attachment determining unit 113, and a driver unit 114.

  The proximity determination unit 111 determines the proximity of an object based on the detection result of the proximity sensor stored in the RAM 12. The detection result of the proximity sensor is a distance between the object and the proximity sensor. The proximity determination unit 111 determines that the proximity sensor has detected the proximity of an object when the detection result (that is, the distance) of the proximity sensor is equal to or less than a predetermined distance (for example, 0). For example, when the proximity sensor is in contact with an object, the detection result of the proximity sensor is zero. Note that the detection result of the proximity sensor may be a distance between the object and the surface of the casing near the proximity sensor.

  The attachment determination unit 113 detects the first temperature detected by the temperature sensor provided in the vicinity of the proximity sensor that detects the proximity of the object and the temperature sensor provided in the vicinity of the proximity sensor that does not detect the proximity of the object. Compare the measured second temperature. Then, the wearing determination unit 113 determines whether or not a glove is worn based on the comparison result between the first temperature and the second temperature.

  The wearing determination unit 113 calculates a difference between the first temperature and the second temperature in the comparison between the first temperature and the second temperature, and determines whether or not the glove is worn based on the calculated difference. As described in (Equation 1), the attachment determination unit 113 calculates an absolute difference value in this calculation.

  As described in (Equation 1), the wearing determination unit 113 determines that a glove is worn when the calculated difference is less than a predetermined temperature, and when the calculated temperature is equal to or higher than the predetermined temperature, the glove is not worn. judge. The temperature determination threshold value ΔTC described in (Expression 1) is an example of a predetermined temperature.

  The average value calculation unit 112 calculates an average of any two or more of a plurality of temperatures detected by the first temperature sensor 181b to the fourth temperature sensor 184b. For example, when there are a plurality of proximity sensors that do not detect the proximity of an object, the average value calculation unit 112 calculates the average of the second temperatures detected by the temperature sensors provided near each of the proximity sensors. Then, the wearing determination unit 113 detects the proximity of the object, the first temperature detected by the temperature sensor provided in the vicinity of one proximity sensor and the second temperature averaged by the average value calculation unit Calculate the difference.

  In the example of FIG. 4, the user's right hand is in contact with the fourth detector 184. In the case of the example in FIG. 4, since the first proximity sensor 181a to the third proximity sensor 183a do not contact an object, there are a plurality of proximity sensors that do not detect the proximity of the object. Therefore, in the example of FIG. 4, the average value calculation unit 112 calculates the average of the three second temperatures detected by the first temperature sensor 181b, the second temperature sensor 182b, and the third temperature sensor 183b. To do.

  The wearing determination unit 113 detects the proximity of the object, the first temperature detected by the fourth temperature sensor 184b provided in the vicinity of one fourth proximity sensor 184a, and the average value calculation unit 112. The difference from the average of the second temperatures calculated by the above is calculated.

  By calculating the average of the second temperatures, the temperature variation detected by the temperature sensor provided in the vicinity of each proximity sensor that does not detect the proximity of the object is averaged, and the accuracy of determining whether or not the glove is worn is increased.

  There may be a plurality of proximity sensors that detect the proximity of an object and a plurality of proximity sensors that do not detect the proximity of an object. In the example of FIG. 4, when the user's right little finger is in contact with the third proximity sensor 183a of the third detector 183, in addition to the fourth proximity sensor 184a of the fourth detector 184, the third The third proximity sensor 183a of the detector 183 also detects the proximity of the object. Thus, when the user's right little finger is further in contact with the third detector 183, the proximity sensors that have detected the proximity of the object are the third proximity sensor 183a and the fourth proximity sensor 184a. . The proximity sensors that do not detect the proximity of an object are the first proximity sensor 181a and the second proximity sensor 182a.

  When there are a plurality of proximity sensors that detect the proximity of an object, the average value calculation unit 112 calculates the average of the first temperatures detected by the temperature sensors provided near each of the proximity sensors. Furthermore, when there are a plurality of proximity sensors that do not detect the proximity of an object, the average value calculation unit 112 calculates the average of the second temperatures detected by the temperature sensors provided in the vicinity of each of the proximity sensors.

  Then, the wearing determination unit 113 calculates a difference between the average of the first temperature calculated by the average value calculation unit 112 and the average of the second temperature calculated by the average value calculation unit 112.

  By calculating the average of the first temperatures, the temperature variation detected by the temperature sensors provided in the vicinity of each proximity sensor that has detected the proximity of the object is averaged, thereby increasing the accuracy of determining whether or not gloves are worn.

  The driver unit 114 is software (also referred to as a driver) for controlling the touch panel 17 in FIG. The driver unit 114 changes the contact detection sensitivity of the touch panel 17 based on the comparison result described above. The contact detection sensitivity is also referred to as a contact determination threshold value. The touch panel 17 determines the presence or absence of contact according to the set contact detection sensitivity.

  Here, it is assumed that the contact detection sensitivity has two sensitivities. The first is low sensitivity and the second is high sensitivity. When high sensitivity is set as the touch detection sensitivity, for example, if the change in electric field or capacitance exceeds the first change amount, the touch panel 17 determines that there is a touch to the touch panel 17 and this change Based on this, the contact position is detected. On the other hand, when low sensitivity is set as the touch detection sensitivity, for example, when the change in electric field or capacitance exceeds a second change amount larger than the first change amount, It is determined that there is contact, and the contact position is detected based on this change.

  The driver unit 114 sets various parameters on the touch panel 17 and changes the parameters after setting. For example, the driver unit 114 changes the sensitivity parameter (that is, contact detection sensitivity) of the touch panel 17.

  Specifically, when it is determined by the wearing determination unit 113 that the glove is worn, the driver unit 114 sets the sensitivity at the time of wearing the glove (that is, high sensitivity) on the touch panel 17 as the contact detection sensitivity. Sensitivity when wearing gloves is an example of first sensitivity.

  On the other hand, when the wearing determination unit 113 determines that the glove is not worn, the driver unit 114 sets the sensitivity when the glove is not worn (that is, low sensitivity) to the touch panel 17 as the contact detection sensitivity. The sensitivity when not wearing gloves is an example of a second sensitivity that is smaller than the first sensitivity.

(Flow diagram)
FIGS. 7 and 8 are first and second flowcharts for explaining the glove wearing / non-glove determining process and the contact detection sensitivity setting process executed in the electronic device 1 of FIG. In the flowcharts of FIGS. 7 and 8, “Ss” (lower case “s” is an integer of 1 or more) indicates step Ss. 7 are executed at a timing when the display device 16 of the electronic device 1 starts the screen display process and the driver unit 114 sets various parameters on the touch panel 17.

  Step S1: The acquisition unit 101 acquires the detection result of the proximity sensor and the detection result of the temperature sensor output from the first detector 181 to the fourth detector 184, and stores them in the RAM 12.

  Step S2: The proximity determination unit 111 determines whether an object (including a human body) is in proximity to the nth detector 18n based on the detection result (ie, distance) of the proximity sensor. In the following description, when the nth distance output by the nth detector 18n is equal to or less than a predetermined distance (for example, 0), it is described that the nth detector 18n has detected the proximity of an object.

  Step S3: Whether the proximity detector 111 determines that all detectors (181 to 184) have detected the proximity of an object, or whether all detectors (181 to 184) have not detected the proximity of an object judge. If it is determined that all detectors (181 to 184) have detected the proximity of an object, or if all detectors (181 to 184) have not detected the proximity of an object (S3 / YES), Move to S8.

  On the other hand, when any one, two, or three detectors of the first detector 181 to the fourth detector 184 detect the proximity of an object (S3 / NO), the process proceeds to S4.

  Step S4: The average value calculation unit 112 calculates the average of the temperatures detected by the detector that has detected the proximity of the object. Specifically, when there are a plurality of proximity sensors that detect the proximity of an object, the average value calculation unit 112 calculates the average of the first temperatures detected by the temperature sensors provided in the vicinity of each of the proximity sensors. To do.

  The average value calculation unit 112 determines the average of the first temperatures as the contact part temperature TA described with reference to FIG. When there is one proximity sensor that detects the proximity of an object, the average value calculation unit 112 determines the first temperature detected by the temperature sensor provided near the one proximity sensor as the contact part temperature TA. The average value calculation unit 112 stores the determined contact part temperature TA in the RAM 12.

  Step S5: The average value calculation unit 112 calculates the average of the temperatures detected by the detector that does not detect the proximity of the object. Specifically, when there are a plurality of proximity sensors that do not detect the proximity of an object, the average value calculation unit 112 calculates the average of the second temperatures detected by the temperature sensors provided in the vicinity of each of the proximity sensors. To do.

  The average value calculation unit 112 determines the average of the second temperatures as the outside air temperature (non-contact part temperature TB) described with reference to FIG. When there is one proximity sensor that does not detect the proximity of an object, the average value calculation unit 112 calculates the second temperature detected by the temperature sensor provided in the vicinity of the one proximity sensor as the outside air temperature (non-contact part temperature TB). ). The average value calculation unit 112 stores the determined outside air temperature (non-contact part temperature TB) in the RAM 12.

  Step S6 in FIG. 8: The mounting determination unit 113 determines whether the absolute difference between the contact part temperature TA determined in S4 and the non-contact part temperature TB determined in S5 is less than the temperature determination threshold value ΔTC. That is, the mounting determination unit 113 determines whether (Equation 1) is satisfied. If (Formula 1) is satisfied (S6 / YES), the wearing determination unit 113 determines that the user is wearing a glove, and outputs a determination result indicating glove wearing to the driver unit 114. On the other hand, if (Equation 1) is not satisfied (S6 / NO), the wearing determination unit 113 determines that the user is not wearing gloves and outputs a determination result indicating that the gloves are not worn to the driver unit 114. When (Formula 1) is satisfied (S6 / YES), the process proceeds to S7. On the other hand, when (Formula 1) is not satisfied (S6 / NO), the process proceeds to S8.

  Step S7: The driver unit 114 sets the glove wearing sensitivity (high sensitivity) as the touch detection sensitivity on the touch panel 17.

  Step S8: The driver unit 114 sets the sensitivity when the gloves are not worn (low sensitivity) as the touch detection sensitivity on the touch panel 17.

(Concrete example)
With reference to FIG. 4 to FIG. 8, the glove wearing determination process and the contact detection sensitivity setting process executed in the electronic device 1 of FIG. 1 will be described.

  First, the acquisition unit 101 acquires the detection result of the proximity sensor and the detection result of the temperature sensor output from the first detector 181 to the fourth detector 184, and stores them in the RAM 12 (S1).

  In the following description, a distance detected by the n-th proximity sensor 18na of the n-th detector (n is an integer of 1 to 4) 18n is referred to as an n-th distance Dn. The temperature detected by the nth temperature sensor 18nb of the nth detector 18n is referred to as the nth temperature Tn.

  The acquisition unit 101 stores the first to fourth distances (D1 to D4) and the first to fourth temperatures (T1 to T4) in the RAM 12.

  Next, the proximity determination unit 111 reads the nth (n is an integer from 1 to 4) distance stored in the RAM 12 (S2). Then, the proximity determination unit 111 determines that the nth detector 18n that has output the nth distance has detected the proximity of the object when the nth distance Dn is equal to or less than a predetermined distance (for example, 0). (S2).

  In the case of the example in FIG. 4, the user's right hand is in contact with the surface of the casing near the fourth detector 184, so the fourth distance D4 is zero. In the case of the example in FIG. 4, since there is no object contact on the surface of the casing near the first detector 181 to the third detector 183, the first to third distances (D1 to D3) are 0. Is over. Accordingly, the proximity determination unit 111 determines that the fourth detector 184 has detected the proximity of the object, and determines that the first detector 181 to the third detector 183 do not detect the proximity of the object.

  Next, whether the proximity determination unit 111 determines that all detectors (181 to 184) have detected the proximity of an object, or whether all the detectors (181 to 184) have not detected the proximity of an object. Determine (S3).

  In the case of “S3 / YES”, it is considered that the electronic device 1 is placed on a desk or placed in a pocket or the like, and the user does not hold the electronic device 1 by himself / herself. . For example, when the electronic device 1 is placed on the desk while the bottom surface of the electronic device 1 is in contact with the top plate of the desk, all detectors (181 to 184) have detected the proximity of the object. Is determined.

  In the case of “S3 / YES”, the determination of the presence / absence of wearing the glove in the present embodiment described with reference to FIG.

  On the other hand, if any one, two, or three detectors of the first detector 181 to the fourth detector 184 detect the proximity of an object (S3 / NO), the user It is assumed that the electronic device 1 is being held. Therefore, in the case of S3 / NO, the determination of the presence / absence of glove wearing in the present embodiment described in FIG. 5 is executed. Specifically, the electronic device 1 performs the processes of S4, S5, and S6 of FIG. 6 to determine whether or not gloves are worn.

  Next, the average value calculation unit 112 calculates the average of the temperatures detected by the detector that has detected the proximity of the object (S4). In the example of FIG. 4, the fourth proximity sensor 184a of the fourth detector 184 is a proximity sensor that detects the proximity of an object (a hand in FIG. 4). Accordingly, the average value calculation unit 112 sets the fourth temperature T4 detected by the fourth proximity sensor 184a of the fourth detector 184 as the contact part temperature TA (S4).

  In the example shown in FIG. 4, when the user's right hand little finger is in contact with the third detector 183, the third detector 183 detects the proximity of the object in addition to the fourth detector 184. Therefore, the average value calculation unit 112 determines the average of the third temperature T3 of the third detector 183 and the fourth temperature T4 of the fourth detector as the contact part temperature TA.

  Next, the average value calculation unit 112 calculates the average of the temperatures detected by the detector that does not detect the proximity of the object (S5). In the case of the example in FIG. 4, the first temperature sensor 181b of the first detector 181; the second temperature sensor 182b of the second detector 182; and the third temperature sensor 183b of the third detector 183, This is a proximity sensor that does not detect the proximity of an object (a hand in the example of FIG. 4). Therefore, the average value calculation unit 112 is the average of the first temperature T1 of the first detector 181 and the second temperature T2 of the second detector 182 and the third temperature T3 of the third detector 183. Is determined as the non-contact part temperature TB (outside air temperature).

  Here, it is assumed that the outside air temperature is 10 ° C. and the temperature determination threshold value ΔTC of (Equation 1) is 2 ° C. (hereinafter referred to as a first assumption). Note that the storage device 14 of FIG. 14 stores the temperature determination threshold value ΔTC. Further, as shown in FIG. 4, it is assumed that the user is holding the electronic device 1 and the contact portion temperature TA is 11 ° C. (hereinafter referred to as the second assumption) while the user is wearing gloves. ).

  In the case of the first and second assumptions, the average value calculation unit 112 determines the contact temperature TA as 11 ° C. in S4, and determines the outside air temperature (non-contact temperature TB) as 10 degrees in S5.

  The attachment determination unit 113 reads the temperature determination threshold value ΔTC from the storage device 14 and stores it in the RAM 12. The attachment determination unit 113 calculates a difference absolute value “1 ° C.” between the contact portion temperature TA of 11 ° C. and the outside air temperature (non-contact portion temperature TB) of 10 ° C., and the difference absolute value “1 ° C.” is the temperature determination. It is determined whether the threshold ΔTC is less than 2 ° C. (S6). The attachment determination unit 113 determines that the difference absolute value “1 ° C.” is less than 2 ° C. of the temperature determination threshold ΔTC (S6 / YES). That is, the wearing determination unit 113 determines that a glove is worn.

  Next, the driver unit 114 sets the glove wearing sensitivity (high sensitivity) as the touch detection sensitivity on the touch panel 17 (S7).

  Here, under the first assumption, it is assumed that the electronic device 1 is held and the contact part temperature TA is 20 ° C. as shown in FIG. The following is referred to as the third assumption).

  The average value calculation unit 112 determines the contact part temperature TA as 20 ° C. in S4, and determines the outside air temperature (non-contact part temperature TB) as 10 degrees in S5.

  The attachment determination unit 113 reads the temperature determination threshold value ΔTC from the storage device 14 and stores it in the RAM 12. The attachment determination unit 113 calculates the absolute difference value “10 ° C.” between the contact portion temperature TA of 20 ° C. and the outside air temperature (non-contact portion temperature TB) of 10 ° C., and the difference absolute value “10 ° C.” is the temperature determination. It is determined whether the threshold ΔTC is less than 2 ° C. (S6). The attachment determination unit 113 does not determine that the difference absolute value “10 ° C.” is less than 2 ° C. of the temperature determination threshold value ΔTC (S6 / NO). That is, the wearing determination unit 113 determines that the gloves are not worn.

  Next, the driver unit 114 sets the sensitivity when the gloves are not worn (low sensitivity) to the touch panel 17 as the contact detection sensitivity (S8).

  As described above, according to the electronic device of the present embodiment, based on the comparison between the contact part temperature TA and the outside air temperature (non-contact part temperature TB), it is determined whether or not the user wears gloves, and the touch panel The contact detection sensitivity can be automatically changed. Since the touch detection sensitivity of the touch panel is automatically changed, the user does not need to manually change the touch detection sensitivity. This automatic change improves user convenience.

  And, according to the electronic device of the present embodiment, based on this comparison, because it is determined whether or not the user is wearing gloves, the outside air temperature of the electronic device is less than a predetermined temperature (for example, 5 ° C.) In addition, the following effects can be achieved as compared with the method of determining that the user is wearing gloves. That is, in the above method, when the outside air temperature is about room temperature (for example, 25 ° C.), it cannot be determined that the user is wearing gloves. However, according to the electronic device of the present embodiment, whether or not the user wears gloves is determined based on the comparison between the contact part temperature TA and the outside air temperature (non-contact part temperature TB). Even when the temperature is about room temperature (for example, 25 ° C.), it is possible to determine with high accuracy whether or not the user is wearing gloves.

  In addition, according to the electronic device of the present embodiment, the user can wear the electronic device while wearing normal gloves, even if he / she does not wear a special glove knitted with a conductive thread at the fingertip of the glove. Since it can be operated, the convenience of the user is not impaired.

(Various holding methods)
Electronic device 1 of the present embodiment only needs to include at least two detectors in order to detect contact part temperature TA and non-contact part temperature TB. However, in order to reliably detect the contact part temperature TA and the non-contact part temperature TB even if the user holds the electronic device 1 by various holding methods, the four corners of the rectangular casing are used. It is preferable to arrange a detector at the bottom.

  With this detector arrangement, even if the user holds the electronic device 1 by various holding methods, the user's hand is in contact with the housing surface near one of the four detectors. However, the user's hand does not come into contact with the housing surface in the vicinity of any one of the four detectors. Therefore, even when the user of the electronic device 1 holds the electronic device 1 with one hand or both hands, the electronic device 1 can detect the contact part temperature TA and the non-contact part temperature TB.

  A state where the surface of the casing near the detector and the user's hand are in contact, or a state where the surface of the casing near the detector and the user's hand are not in contact is referred to as a state of contact with the detector as appropriate.

  The various holding methods described above are a method in which the user holds the electronic device 1 with the left hand or the right hand, and a method in which the electronic device 1 is held in a state rotated 90 degrees left and right from the state shown in FIGS. . Hereinafter, an example of the various holding methods described above will be described with reference to FIGS. 9 to 11, and the contact state with the detector in FIGS. 9 to 12 will be described with reference to FIG.

  9 to 11 are first to third diagrams illustrating various holding methods. FIG. 12 is a table showing a contact state with the detector. The table in FIG. 12 includes a column for holding the electronic device and a column indicating contact with the detector.

  The electronic device holding method column includes an electronic device orientation column and a handle column. The direction column of the electronic device indicates a state in which the direction of the electronic device 1 shown in FIG. The handle column indicates a hand that the user is holding the electronic device 1 (that is, a handle).

  The contact column with the detector is a column indicating a contact state between the first detector 181 to the fourth detector 184 and the user. In the contact column with the detector, identification symbols (181 to 184) for identifying the first detector 181 to the fourth detector 184 are described. This identification symbol is a code of the detector.

  The contact state is described in the identification symbol column of the contact column with the detector. Specifically, in the electronic device holding method column, the direction of the electronic device and the handle, the user is holding the electronic device, and in the vicinity of the detector identified by the identification symbol. When the surface of the casing is in contact with the user's handle, a black circle indicating contact is shown. On the other hand, in the above-described state, when the casing surface near the detector identified by the identification symbol is not in contact with the user's handle, a white circle indicating contact is shown.

  In FIG. 4, when the electronic device 1 is vertical and the handle is the right hand, the user's hand is in contact with the surface of the casing near the fourth detector 184, but the first detector 181 to the third detector No contact is made with the surface of the casing near the detector 183. The contact state with such a user is shown in the table of FIG. 12 with the line where the “vertical” line in the column for electronic equipment and the “right hand” line in the handle field match, and the contact field with the detector. Four intersecting cells are indicated by "○", "○", "○", "●".

  In FIG. 9, the user holds the electronic device 1 with the left hand LH. In FIG. 9, the electronic device 1 is vertical as in FIG. When the electronic device 1 is vertical and the handle is the left hand LH, the user's hand is in contact with the surface of the housing near the third detector 183, but the first detector 181 and the second detector 182, no contact with the casing surface near the fourth detector 184. The contact state with such a user is shown in the table of FIG. 12 with the line where the “vertical” line in the column for electronic equipment and the “left hand” line in the handle field match, and the contact field with the detector. Four intersecting cells are indicated by “○”, “○”, “●”, “○”.

  In FIG. 10, the user holds the electronic device 1 with the left hand LH or the right hand RH. In FIG. 10, unlike FIG. 4, the electronic device 1 is in a horizontal state rotated 90 ° to the right from the state of FIG.

  FIG. 10 (A) shows a state in which the user holds the electronic device 1 in a horizontal state rotated 90 ° rightward with the right hand RH. In the holding method of FIG. 10 (A), the user's right hand RH is in contact with the surface of the housing near the second detector 182, but the first detector 181, the third detector 183, and the fourth detector There is no contact with the housing surface near the detector 184. The contact state with such a user is shown in the table of FIG. 12 with the line where the “horizontal (right turn)” line in the column for electronic equipment and the “right hand” line in the handle column match, The four cells intersecting with the contact field are indicated by “O”, “●”, “O”, “O”.

  FIG. 10B shows a state in which the user holds the electronic device 1 in the horizontal state rotated 90 ° to the right with the left hand LH. In the holding method of FIG. 10 (B), the user's left hand LH is in contact with the surface of the casing in the vicinity of the fourth detector 184, but the casing in the vicinity of the first detector 181 to the third detector 183. No contact with the surface. The contact state with such a user is shown in the table of FIG. 12 with the line where the “horizontal (right turn)” line in the column for electronic equipment and the “left hand” line in the handle column coincide with the detector. The four cells intersecting with the contact field are indicated by “○”, “○”, “○”, “●”.

  In FIG. 11, the user holds electronic device 1 with left hand LH or right hand RH. In FIG. 11, unlike FIG. 4, the electronic device 1 is in a horizontal state rotated 90 ° to the left from the state of FIG.

  FIG. 11 (A) shows a state where the user holds electronic device 1 in a horizontal state rotated 90 ° to the left side with right hand LH. In the holding method of FIG. 11 (A), the right hand RH of the user is in contact with the housing surface near the third detector 183, but the first detector 181, the second detector 182, and the fourth detector There is no contact with the housing surface near the detector 184. The contact state with such a user is shown in the table of FIG. 12 with the line where the “horizontal (left rotation)” line in the column for electronic equipment matches the “right hand” line in the handle column, and the detector. The four cells intersecting with the contact field are indicated by “O”, “O”, “●”, “O”.

  FIG. 11B shows a state in which the user holds the electronic device 1 in a horizontal state rotated 90 ° to the left with the left hand LH. In the holding method of FIG. 11 (B), the user's left hand LH is in contact with the surface of the casing near the first detector 181, but the casing near the second detector 182 to the fourth detector 184. No contact with the surface. The contact state with such a user is shown in the table of FIG. 12 with the line where the “horizontal (left rotation)” line in the column for electronic equipment matches the “left hand” line in the handle column and the detector. The four cells that intersect with the contact field are indicated by "●", "○", "○", and "○".

  As described with reference to FIGS. 2 and 3, in electronic device 1 of the present embodiment, detectors are arranged at the bottoms of the four corners of a rectangular housing. With this arrangement, as shown in FIGS. 9 to 12, even if the user holds the electronic device 1 by various holding methods, the surface of the casing in the vicinity of any one of the four detectors And the user's hand come into contact, and the surface of the casing near one of the four detectors comes into contact with the user's hand. Therefore, even when the user of the electronic device 1 holds the electronic device 1 with one hand or both hands, the electronic device 1 can detect the contact part temperature TA and the non-contact part temperature TB.

  The above embodiment is summarized as follows.

(Appendix 1)
A plurality of proximity sensors for detecting the proximity of an object and temperature sensors provided in the vicinity of the proximity sensor; and
A position detection device for detecting a contact position of an object with respect to the contact surface;
The first temperature detected by the temperature sensor provided in the vicinity of the proximity sensor that detects the proximity of the object, and the second temperature detected by the temperature sensor provided in the vicinity of the proximity sensor that does not detect the proximity of the object And a changing unit that changes the contact detection sensitivity of the position detection device based on the comparison result.

(Appendix 2)
The changing unit calculates a difference between the first temperature and the second temperature in the comparison between the first temperature and the second temperature, and based on the calculated difference, the contact of the position detection device The electronic device as set forth in Appendix 1, wherein the detection sensitivity is changed.

(Appendix 3)
The changing unit changes the contact detection sensitivity to a first sensitivity when the calculated difference is less than a predetermined temperature, and sets the contact detection sensitivity to the first sensitivity when the difference is equal to or higher than the predetermined temperature. The electronic device as set forth in appendix 2, wherein the second sensitivity is lower than the first sensitivity.

(Appendix 4)
When there are a plurality of proximity sensors that do not detect the proximity of an object, the changing unit includes an average value calculating unit that calculates an average of the second temperatures detected by the temperature sensors provided in the vicinity of the proximity sensors. And
The change unit detects a proximity of an object, and a difference between a first temperature detected by a temperature sensor provided in the vicinity of one proximity sensor and a second temperature averaged by the average value calculation unit The electronic device according to attachment 2, wherein the electronic device is calculated.

(Appendix 5)
When there are a plurality of proximity sensors that detect the proximity of an object, the changing unit calculates an average of the first temperatures detected by the temperature sensors provided in the vicinity of each of the proximity sensors, and further, the proximity of the object When there are a plurality of proximity sensors that do not detect the proximity sensor, an average value calculation unit that calculates the average of the second temperatures detected by the temperature sensors provided in the vicinity of each of the proximity sensors,
The change unit calculates a difference between an average of the first temperature calculated by the average value calculation unit and an average of the second temperature calculated by the average value calculation unit. The electronic device as described in.

(Appendix 6)
The electronic device includes a rectangular housing,
2. The electronic device according to appendix 1, wherein the proximity sensor and the temperature sensor provided in the vicinity of the proximity sensor are provided at any two or more of the four corners of the housing. .

(Appendix 7)
An electronic apparatus having a plurality of proximity sensors that detect the proximity of an object and a temperature sensor provided in the vicinity of the proximity sensor, and further including a position detection device that detects a contact position of the object with respect to the contact surface,
The first temperature detected by the temperature sensor provided in the vicinity of the proximity sensor that detects the proximity of the object, and the second temperature detected by the temperature sensor provided in the vicinity of the proximity sensor that does not detect the proximity of the object And compare
A contact detection sensitivity changing program that executes a process of changing the contact detection sensitivity of the position detection device based on a comparison result between the first temperature and the second temperature.

1 ... electronic equipment, 11 ... CPU, 12 ... RAM, 13 ... ROM, 14 ... storage device, 15 ... wireless communication device, 16 ... display device, 17 ... touch panel, 181 to 184 ... first detector to fourth Detectors, 181a to 181d ... first proximity sensor to fourth proximity sensor, 182a to 181d ... first temperature sensor to fourth temperature sensor, 100 ... control software, 101 ... acquisition unit, 110 ... change unit, 111: Proximity determining unit, 112 ... Average value calculating unit, 113 ... Mounting determining unit, 114 ... Driver unit.

Claims (4)

A plurality of proximity sensors for detecting the proximity of an object and temperature sensors provided in the vicinity of the proximity sensor; and
A position detection device for detecting a contact position of an object with respect to the contact surface;
The first temperature detected by the temperature sensor provided in the vicinity of the proximity sensor that detects the proximity of the object, and the second temperature detected by the temperature sensor provided in the vicinity of the proximity sensor that does not detect the proximity of the object And a changing unit that changes the contact detection sensitivity of the position detection device based on the comparison result. The changing unit calculates a difference between the first temperature and the second temperature in the comparison between the first temperature and the second temperature, and based on the calculated difference, the contact of the position detection device 2. The electronic device according to claim 1, wherein the detection sensitivity is changed. The changing unit changes the contact detection sensitivity to a first sensitivity when the calculated difference is less than a predetermined temperature, and sets the contact detection sensitivity to the first sensitivity when the difference is equal to or higher than the predetermined temperature. 3. The electronic device according to claim 2, wherein the electronic device is changed to a second sensitivity smaller than the first sensitivity. An electronic apparatus having a plurality of proximity sensors that detect the proximity of an object and a temperature sensor provided in the vicinity of the proximity sensor, and further including a position detection device that detects a contact position of the object with respect to the contact surface,
The first temperature detected by the temperature sensor provided in the vicinity of the proximity sensor that detects the proximity of the object, and the second temperature detected by the temperature sensor provided in the vicinity of the proximity sensor that does not detect the proximity of the object And compare
A contact detection sensitivity changing program that executes a process of changing the contact detection sensitivity of the position detection device based on a comparison result between the first temperature and the second temperature.

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