JP5350151B2 - Electronic device, control method thereof, and program - Google Patents

Description

  The present invention relates to an electronic device including a display device having a touch panel function, a control method thereof, and a program.

  In recent years, the number of display devices using a touch panel has been increased and has been adopted for cameras, and various operations such as release and camera settings can be performed (Patent Document 1).

  In addition, by incorporating sensors that detect the position and area of the finger and sensors that detect temperature and pressure into the touch panel device, if the criteria for these sensors are not met, In some cases, there is also an invention characterized by preventing malfunction of the touch panel device (Patent Document 2).

JP 2006-203774 A JP 2006-195864 A

  However, the above-mentioned Patent Document 2 has a problem that it cannot be operated by a person other than a person such as a stylus. In addition, it is necessary to provide a plurality of sensors, and there are problems such as securing a space for that purpose and increasing costs.

  The present invention has been made in view of the above points, and an object of the present invention is to prevent the touch panel function from operating in the case of a contact not intended by the photographer without increasing the cost. .

An electronic apparatus of the present invention is an electronic apparatus including a display device having a touch panel function, and includes a photosensor arranged in a matrix in the display device, and a display screen of the display device read by the photosensor . There is a change in the amount of light that enters the predetermined amount or more in a predetermined area or more, there is no fingerprint on the object that touches the display screen of the display device, and the object that touches the display screen of the display device If the area is determined to be greater than the predetermined area, characterized by comprising a control means for prohibiting the operation by the touch panel function.

  According to the present invention, the operation of the touch panel function is permitted in the case of a contact intended by the user with a human finger or stylus, and the operation of the touch panel function is prohibited in the case of an unintended contact with a human nose or the like. Is possible. In addition, since an optical sensor built in the display device is used, it is possible to save space and cost of the electronic device.

1 is an external view of a camera according to an embodiment of the present invention. It is a block diagram which shows the main structures of the camera which concerns on embodiment of this invention. It is a flowchart for demonstrating the malfunction prevention process of the touchscreen function in embodiment of this invention. It is a figure which shows the example of the contact thing to the display screen in embodiment of this invention. It is a partial enlarged view of the display apparatus in the embodiment of the present invention.

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is an external view of a camera 11 according to the present embodiment. FIG. 1A is a view of the camera 11 viewed from the back (photographer side), and FIG. 1B is a view of the camera 11 viewed from the front (lens side). Reference numeral 12 denotes a viewfinder. Usually, a photographer takes a picture while looking through the viewfinder 12 with his / her eyes. A display device 13 displays a captured image, a setting screen, and the like, and an optical sensor is embedded between the pixels. Reference numeral 14 denotes an operation dial for setting the camera 11. Reference numeral 15 denotes a release button. When the release button 15 is pressed, the camera 11 takes an image. Reference numeral 16 denotes a mode dial for switching the photographing mode of the camera 11. Reference numeral 17 denotes a photographing lens.

  FIG. 2 is a block diagram illustrating a main configuration of the camera 11 according to the present embodiment. Reference numeral 21 denotes an optical sensor embedded in the display device 13. Reference numeral 22 denotes a display unit (pixel) configured to display information using RGB liquid crystal, organic EL, or the like.

  Reference numeral 24 denotes a CPU as control means for controlling the camera 11. An optical sensor scan circuit unit 23 inputs optical information from the optical sensor 21 to the CPU 24. Reference numeral 25 denotes a display device driving circuit unit for displaying information from the CPU 24 on the display device 13.

  Here, FIG. 5 is an enlarged view of a part of the screen of the display device 13, and the optical sensors 21 are embedded in the display device 13 in a matrix. The display unit 22 displays an image or the like by the backlight of the display device 13 or the light emission of the display unit 22 itself.

  The optical sensor 21 reads at least two kinds of optical information of the peripheral light amount (external light) of the display screen and the reflected light of the contact object due to the light emitted from the backlight and the display unit 22 itself and transmits it to the optical sensor scan circuit unit 23. The optical sensor scan circuit unit 23 converts optical information (analog information) received from the optical sensor 21 into digital information and transmits it to the CPU 24.

  Based on the information received from the optical sensor scan circuit unit 23, the CPU 24 performs a malfunction prevention function of a touch panel function described in detail later. That is, when the execution result is permission of operation of the touch panel function, the setting of the camera 11 is changed, or when there is information to be displayed on the display device 13, the digital information is transmitted to the display device driving circuit unit 25. To do. On the other hand, when the execution result indicates that the operation of the touch panel function is prohibited, at least the setting of the camera 11 is not changed.

  The display device driving circuit unit 25 converts the digital information received from the CPU 24 into analog information and transmits it to the display device 13. The display unit 22 displays the analog information received from the display device driving circuit unit 25 on the display screen.

  Here, the CPU 24 in the camera 11 has a fingerprint detection function for determining the presence or absence of a fingerprint of the contact object, and a contact area calculation function for calculating the contact area of the contact object.

  The optical sensor scan circuit unit 23 reads the peripheral light amount of the display screen through the optical sensor 21 at predetermined time intervals. Based on the peripheral light amount read by the optical sensor scan circuit unit 23, the CPU 24 determines that the object has approached the display screen when there is a change in the peripheral light amount equal to or greater than the predetermined light amount over a predetermined area. At least in that case, the fingerprint detection by the fingerprint detection function and the contact area calculation by the contact area calculation function are performed. The predetermined area referred to here is an area such that the photographer's face covers the display screen particularly when the photographer looks into the viewfinder 12 of the camera 11.

  In the fingerprint detection function and the contact area calculation function, when an object touches the display screen of the display device 13, the optical sensor scan circuit unit 23 converts the reflected light of the contact read by the optical sensor 21 into A / D conversion. Thus, the CPU 24 transmits information to the CPU 24, and the CPU 24 determines the presence / absence of the fingerprint of the contact object and calculates the contact area.

  FIG. 3 is a flowchart for explaining the malfunction prevention function of the touch panel function of the CPU 24 in the camera 11. Camera operation is started (step S301), and it is first determined whether or not the display screen of the display device 13 is lit (step S302). If the display screen is not lit, the operation of the touch panel function is prohibited (step S307). If the display screen is lit, the amount of light entering the display screen is read by the optical sensor 21 at a predetermined time interval (step S303), and it is determined whether or not the peripheral light amount of the display screen has changed more than a predetermined amount (step S303). S304). As described above, the change greater than a predetermined value is a change greater than a predetermined amount of light in a predetermined area or more due to the approach of the photographer's face.

  In step S304, if a change beyond a predetermined value is not confirmed in the light amount entering the display screen, the operation of the touch panel function is permitted (step S308), and if there is a predetermined change, the process proceeds to step S305.

  Here, FIG. 4 is a diagram of an example of a contact object on the display screen, 41 is a fingerprint, 42 is a contact area, and 43 is a stylus. In step S305, when an object touches the display screen, it is determined based on information from the fingerprint detection function whether the object has a fingerprint 41 as shown in FIG. The fingerprint detection function does not require the accuracy of fingerprint detection that can clearly identify an individual, and it is only necessary to determine whether or not the fingerprint 41 is present on the contact object. If there is a fingerprint 41 in step S305, the finger is assumed to be a finger, and in this case, the operation of the touch panel function is permitted as a contact intended by the user (step S308). On the other hand, if there is no fingerprint 41, the process proceeds to step S306.

  In step S306, it is determined based on the calculation result of the contact area calculation function whether or not the contact area 42 is equal to or smaller than a predetermined area when an object touches the display screen. For example, when the contact area 42 is equal to or smaller than a predetermined area, it is determined that the contact object is the stylus 43 and the operation of the touch panel function is permitted (step S308). On the other hand, when the contact area 42 is not equal to or smaller than the predetermined area, the operation of the touch panel function is prohibited, for example, because the photographer's nose has not touched the display screen by mistake. Step S307).

  In addition to the above description, permission / prohibition of operation of the touch panel function may be controlled for other reasons. For example, in addition to the photosensors 21 arranged in a matrix in the display device 13, a photometric unit for determining the exposure for photographing is provided, and the operation of the touch panel function is prohibited when the photometric unit is performing photometry. You may do it.

  When the operation of the touch panel function is prohibited, the display screen may be turned off while being prohibited.

  As described above, when a person's finger or stylus comes into contact, it is considered that the user has intentionally made contact, so the operation of the touch panel function is permitted. Thereby, in the case of an unintended contact, the operation of the touch panel function can be prohibited, and malfunction due to the touch panel function can be reduced. For example, when the photographer accidentally touches the display screen with a part of the face when the finder 12 is in contact, the operation of the touch panel function is prohibited, so that an unintended setting by the photographer, that is, malfunction is prevented. Can do. In addition, since the optical sensor 21 incorporated in the display device 13 is used, it is possible to save space and reduce the cost of the electronic device.

  In addition, the structure shown in the said embodiment is only an example, and this invention is not limited to the structure shown in figure. For example, the present invention may be applied as a part of a system constituted by a plurality of devices or may be applied to a part of an apparatus constituted by one device.

  The object of the present invention can also be achieved by supplying a storage medium storing software program codes for realizing the functions of the above-described embodiments to a system or apparatus. In this case, the computer (or CPU or MPU) of the system or apparatus reads and executes the program code stored in the storage medium.

  In this case, the program code itself read from the storage medium realizes the functions of the above-described embodiments, and the program code itself and the storage medium storing the program code constitute the present invention.

  As a storage medium for supplying the program code, for example, a flexible disk, a hard disk, an optical disk, a magneto-optical disk, a CD-ROM, a CD-R, a magnetic tape, a nonvolatile memory card, a ROM, or the like can be used.

  Further, the function of the above-described embodiment is not limited to being realized by executing the program code read by the computer. For example, an OS (basic system or operating system) running on a computer performs part or all of the actual processing based on an instruction of the program code, and the functions of the above-described embodiments are realized by the processing. May be.

  Further, the program code read from the storage medium may be written in a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer. In this case, after being written in the memory, the CPU of the function expansion board or function expansion unit performs part or all of the actual processing based on the instruction of the program code, and the function of the above-described embodiment is performed by the processing. Is realized.

11: Camera, 12: Viewfinder, 13: Display device, 14: Operation dial, 15: Release button, 16: Mode dial, 17: Shooting lens, 21: Optical sensor, 22: Display unit, 23: Optical sensor scan circuit unit , 24: CPU, 25: display device driving circuit section

Claims (7)

An electronic device including a display device having a touch panel function,
Photosensors arranged in a matrix in the display device;
The amount of light entering the display screen of the display device read by the optical sensor has a change of a predetermined amount or more in a predetermined area or more, and the object touching the display screen of the display device has no fingerprint, and , if the contact area of an object touching the display screen of the display device is determined to be greater than the predetermined area, the electronic device, characterized in that and a control means for inhibiting operation by the touch panel function. Wherein, the electronic device according to claim 1, characterized in that turning off the display device as well as prohibiting the operation by the touch panel function. The electronic apparatus according to claim 1 , wherein the electronic apparatus is a camera including a display device having a touch panel function on a back surface. A method for controlling an electronic device including a display device having a touch panel function,
The amount of light entering the display screen of the display device read by the photosensors arranged in a matrix in the display device has a change greater than or equal to a predetermined amount of light in a predetermined area or more, and the display screen of the display device When the object touched by the touch panel has no fingerprint and the contact area of the object touched by the display screen of the display device is determined to be larger than a predetermined area, the operation by the touch panel function is prohibited. Device control method. The method for controlling an electronic device according to claim 4, wherein an operation by the touch panel function is prohibited and the display device is turned off. A program for controlling an electronic device including a display device having a touch panel function,
The amount of light entering the display screen of the display device read by the photosensors arranged in a matrix in the display device has a change greater than or equal to a predetermined amount of light in a predetermined area or more, and the display screen of the display device In order to cause the computer to execute processing for prohibiting the operation of the touch panel function when it is determined that the object touching the screen has no fingerprint and the contact area of the object touching the display screen of the display device is larger than a predetermined area Program. The program according to claim 6, wherein an operation by the touch panel function is prohibited and the display device is turned off.

Images