JP2006195706A - Optical coordinate input device and electronic device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new structure capable of reconciling miniaturization and operability for a coordinate input device mounted to a device body. <P>SOLUTION: The optical coordinate input device 101 which is a coordinate input device built in the device body comprises an optical window 113 exposed on the outer face of the device body, a light source 114 for radiating illuminating light to the optical window from the inside, an optical sensor 116 for detecting the reflected light of the illuminating light, an image processing means for outputting image data corresponding to the surface aspect of an object on the optical window according to an output from the optical sensor, and a coordinate signal output means for outputting a coordinate signal depending on a movement aspect according to the image data output by the image processing means. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an optical coordinate input device and an electronic device, and more particularly to a configuration of an input device suitable for operating a display screen of a portable electronic device.

  In general, when operating a personal computer, various input devices such as a keyboard, a mouse, a joystick, a trackball, and a touchpad are used. In many cases, these input devices have a function of inputting or specifying a predetermined coordinate position on the display screen, thereby controlling the position of the cursor or pointer displayed on the display screen, or displaying the display screen. It is configured to perform selection of a plurality of buttons shown in FIG.

  There are various input methods of the input device such as a mechanical type, an optical type, and a capacitance type. For example, in the case of a mouse, in a relatively early stage, a ball that rolls in contact with the operation surface is used. Mechanical mice that mechanically detect the direction and amount of rotation were the mainstream, but in recent years, optical mice that optically detect the direction and amount of movement based on the movement mode of the image on the operating surface have appeared, It has become mainstream. In the case of this optical mouse, a light source such as an LED (light emitting diode) or LD (laser diode) and an optical sensor that detects an image of the operation surface by reflecting light emitted from the light source on the operation surface are provided. By performing image processing on the output signal of the optical sensor, the moving direction and moving amount of the mouse are derived.

However, the above-mentioned mouse requires an operation surface such as a desk and requires a certain area as an operation surface. Therefore, in a portable electronic device or the like, it is provided on the device body and can be operated with fingers. Joysticks, trackballs, touchpads, etc. are used. In such an input device, an operation surface is unnecessary and it is convenient to carry because it is incorporated in the main body of the device. However, the operation area is limited, a delicate operation is required, and a large operation amount is obtained. There are many operational problems such as that it is necessary to repeat the operation many times. As a coordinate input device built in such a device main body, what is called a touch pad is mainly used (for example, refer to Patent Documents 1 to 3 below).
Japanese National Patent Publication No. 10-505183 US Pat. No. 5,543,588 US Pat. No. 5,942,733

  However, it is difficult to achieve both operability and downsizing in a coordinate input device built into the device body such as the touchpad described above. For example, a touchpad has a relatively large operation surface, so subtle operations are possible, but it cannot be said that operability is good because it requires a large movement of the finger on the operation surface. In order to secure the amount, a somewhat wide operation surface is required, so it is not suitable for miniaturization. As other input devices of this type, there are known track balls and flexible sticks which are configured to be extremely small, but these have sacrificed operability greatly due to their miniaturization.

  Therefore, the present invention solves the above-described problems, and its object is to provide a new configuration that can achieve both downsizing and operability in a coordinate input device mounted on a device body. .

  In view of such circumstances, the optical coordinate input device of the present invention is a coordinate input device incorporated in an apparatus main body, an optical window exposed on the outer surface of the apparatus main body, and from the inside toward the optical window. A light source for illuminating illumination light, an optical sensor for detecting reflected light of the illumination light, and image processing means for outputting image data corresponding to a surface aspect on the optical window of the object based on an output of the optical sensor; And coordinate signal output means for outputting a coordinate signal corresponding to the movement mode based on image data output from the image processing means.

  In the present invention, the light source emits illumination light toward the optical window exposed on the outer surface of the device body, the reflected light of the illumination light is detected by the optical sensor, and the image processing means is based on the output of the optical sensor. Image data corresponding to the surface state of the object on the optical window is output, and coordinate signal output means outputs a coordinate signal based on the image data. Accordingly, by moving a finger or the like on the outer surface of the optical window to move, a coordinate signal corresponding to the moving direction and moving amount can be output.

  In this case, it is configured to detect the surface mode of the object that contacts the outer surface of the optical window, for example, the surface pattern, and to determine the moving direction and moving amount of the object by image processing. Since the amount of movement can be detected, the window area of the optical window can be reduced, and the operation surface can be reduced in size. Further, since the operation can be performed simply by bringing a finger into contact with the surface of the optical window and tilting the finger to change the contact portion, it is possible to suppress deterioration in operability.

  In addition, as a planar dimension of the said optical window, it is desirable to be in the range of 3-30 mm in diameter, respectively, respectively. According to this, the operation surface can be configured to be sufficiently small, and sufficient optical information can be acquired even when an operation is performed with a finger.

  The coordinate signal may be a signal that can know the moving direction and the moving amount of the object. For example, the coordinate signal may be a signal indicating an absolute coordinate value of a two-dimensional coordinate system, and a movement vector of the two-dimensional coordinate system. May be a signal indicating.

  In the present invention, it is preferable that the outer surface of the optical window is curved in a concave shape. According to this, since the outer surface of the optical window is curved in a concave shape, a sufficient contact area between the optical window and the finger can be secured, or the side surface of the finger can be easily brought into contact with the optical window. Therefore, it is possible to detect a wider range of optical information, such as capturing image information on the side surface of the finger, so that a sufficient amount of information can be obtained even if the window area of the optical window is small.

  The radius of curvature of the outer surface of the optical window is preferably in the range of 3 to 30 mm. If it falls below this range, it will be difficult to make fingers tightly contacted and the window area of the optical window will not be sufficiently secured. If it exceeds the above range, it will be difficult to obtain the effect of making the outer surface of the optical window a concave curved surface. .

  In the present invention, it is preferable that the outer surface of the optical window is curved in a convex shape. According to this, by bringing a finger or the like into contact with the optical surface, the contact surface of the finger is deformed into a concave shape, whereby a sufficient contact area between the optical window and the finger can be secured. Since the reflected light is converged and detected by the optical sensor, sufficient information can be acquired more efficiently, for example, a high amount of information can be obtained even with a small imaging surface.

  The radius of curvature of the outer surface of the optical window is preferably in the range of 3 to 30 mm. If it falls below this range, it will be difficult to make fingers tightly contacted, and the window area of the optical window will not be sufficiently secured. If it exceeds this range, the effect of making the outer surface of the optical window convex will be difficult to obtain. .

  In the present invention, it is preferable that the image processing means extracts and outputs only an image of a surface portion of the object that is in contact with the outer surface of the optical window. According to this, since the image processing means extracts only the image of the surface portion of the object that is in contact with the outer surface of the optical window, it is less affected by external conditions such as changes in the brightness of external light. High-accuracy coordinate input is possible.

  In this case, as a method for extracting only the image of the surface portion in contact with the outer surface of the optical window, various methods such as setting the brightness and the hue threshold can be adopted, and in particular, the surface portion in contact with the optical window. A method for discriminating image areas based on the difference between the surface aspect of the surface and the surface aspect of the surface portion separated from the outer surface of the optical window, and a method for detecting the boundary line between both surface portions based on the change rate of brightness and hue , It is difficult to be affected by disturbances such as changes in external light, and stable extraction can be performed.

  The optical coordinate input device of the present invention described above can be mounted on various electronic devices, and in particular, portable personal computers such as mobile phones, portable information terminals, electronic watches, mobile notebooks, digital still cameras, and portable devices. When mounted on portable electronic devices such as various imaging devices such as video cameras, a high effect can be exhibited.

  Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a schematic perspective view showing an external appearance of an electronic device (portable electronic device) 100 equipped with the optical coordinate input device of this embodiment. The electronic device 100 is an example of a mobile phone, and includes an operation unit 110 provided with various external operation members such as push buttons, a circuit board 121, and a display body 122. The display screen 122a is provided with the display part 120 by which the surface is comprised. In the case of the illustrated example, the operation unit 110 and the display unit 120 are configured to be foldable.

  A circuit board 111 is built in the operation unit 110, and an optical detection unit 112 is mounted on the circuit board 111. The optical detection unit 112 includes an optical window 113 exposed on the outer surface of the operation unit 110. The optical window 113 is made of a translucent material such as hard plastic, glass, or quartz. The optical window 113 may be a material that can transmit light used in the optical detection unit 112. For example, if the light is infrared light, it may be made of a material that can transmit infrared light. In the present embodiment, the optical window 113 is configured to be operated while touched with the finger 1 as indicated by a two-dot chain line in the figure.

  FIG. 2 is a schematic longitudinal sectional view showing the overall configuration of the optical detection unit 112 of the present embodiment. The optical detection unit 112 includes a light source 114 that irradiates illumination light toward the optical window 113 from the inside. As this light source 114, it is preferable to use LED (light emitting diode), LD (laser diode), etc. from a viewpoint of size reduction and energy saving. In the present embodiment, an optical component 115 composed of a refracting plate (prism) or the like is disposed between the light source 114 and the optical window 113. The optical component 115 can be integrated with the light source 114. In the case of the illustrated example, the light source 114 is disposed inside the optical window 113 in a posture having an optical axis substantially parallel to the outer surface of the optical window 113, and the optical component 115 inclines the optical axis of the light source 114 outwardly, 113.

  An optical sensor 116 having a light receiving portion facing the optical window 113 is disposed inside the optical window 113. When the illumination light emitted from the light source 114 goes out through the optical window 113, the reflected light reflected by the surface of the finger 1 in contact with the outer surface of the optical window 113 is detected by the optical sensor 116. It is configured to be able to. The optical sensor 116 usually includes an image sensor having a sensor array structure in which a large number of pixels (configured by a light detection unit, a photodiode, and the like) are arranged. For example, it can be constituted by a general CCD sensor, a CMOS sensor, or the like, and the number of pixels is sufficient if it is about several hundred to several tens of thousands, but it may be more.

  Although the opening dimension of the optical window 113 is not limited at all, it is preferable that the diameter is in the range of 3 to 30 mm in each of the vertical and horizontal directions. Within this range, portability is not hindered even when mounted on a portable electronic device, and detection sensitivity and operability are not sacrificed. If it falls below the above range, the detection sensitivity deteriorates and it becomes difficult to input coordinates. If it exceeds the above range, downsizing becomes difficult, and it becomes necessary to move the finger over a wide range when operating with a finger or the like.

  FIG. 3 is a schematic longitudinal sectional view showing the configuration of different optical detection units 212. The optical detection unit 212 includes an optical window 213, a light source 214, an optical component 215, and an optical sensor 216 similar to the optical detection unit 112. In this optical detection unit 212, an optical fiber 214a is connected to the light source 214, and a light emitting part 214b having a lens or the like is provided at the tip of the optical fiber 214a. The light emitted from the light source 214 passes through the inside of the optical fiber 214a and is emitted from the light emitting unit 214b. By using this optical fiber 214a, the degree of freedom of the arrangement of the light source 214 can be increased, and the light source 214 can be arranged at an arbitrary location on the apparatus main body. Further, it is possible to freely set the light emitting direction of the light emitting unit 214b regardless of the position and posture of the light source 214.

  In the optical detection unit 212, an optical fiber 216a is connected to the optical sensor 216, and a light receiving unit 216b including a lens or the like is provided at the tip of the optical fiber 216a. The light received by the light receiving unit 216b passes through the optical fiber 216a and is detected by the optical sensor 216. By using this optical fiber 216a, the degree of freedom of arrangement of the optical sensor 216 can be increased, and the optical sensor 216 can be arranged at an arbitrary location of the apparatus main body. In addition, the light receiving direction of the light receiving unit 216b can be freely set regardless of the position and posture of the optical sensor 216.

  4 is a schematic longitudinal sectional view showing the configuration of a further different optical detection unit 312. FIG. 5 is a schematic longitudinal sectional view showing a cross section orthogonal to FIG. The optical detection unit 312 includes a light source 314, an optical component 315, and an optical sensor 316 similar to the optical detection unit 112 or 212. In this optical detection unit 312, the outer surface 313a of the optical window 313 is configured in a concave shape. The outer surface 313a has a concave curved surface shape, more specifically, a concave spherical surface shape. In the illustrated example, the optical window 313 has substantially the same thickness as a whole, and the inner surface thereof is also formed in a concave shape (concave curved surface shape or concave spherical shape) along the outer surface 313a.

  In the optical detection unit 312, when the finger 1 is brought into contact with the outer surface 313a of the concave curved optical window 313, a wider range of the surface of the finger 1 can be easily brought into contact with the outer surface 313a. That is, the contact area between the finger 1 and the optical window 313 can be increased without strongly pressing the finger 1 against the optical window 313. Further, since the side surface of the finger 1 is also easily brought into contact with the outer surface 313a, the surface mode of the side surface of the finger 1 can be captured as an image. Then, as shown in FIGS. 4 and 5, by rotating the finger 1 so as to be twisted in accordance with the curvature of the outer surface 313a, the surface state detected by the optical sensor 316 can be easily changed, Can be improved.

  Note that the curvature of the outer surface 313a of the optical window 313 is not limited in any way, but when mounted on a small portable device, the curvature radius is preferably in the range of 3 to 30 mm. If it is within this range, it can be easily operated with the finger 1 and image information to be detected by the optical sensor 316 can be sufficiently acquired. If it is below the above range, it becomes difficult to make the finger 1 contact on the outer surface 313a and it becomes difficult to ensure a sufficient surface area of the finger 1 that contacts the outer surface 313a, so the data amount of image information detected by the optical sensor 316 Is insufficient, and good detection becomes difficult. On the other hand, if the above range is exceeded, the radius of curvature of the outer surface 313a becomes too large compared to the radius of curvature of the surface of the finger 1, and the effect of configuring the outer surface 313a to be concave becomes difficult to obtain.

  In the optical detection unit 312, the outer surface 313 a is formed in a spherical shape, and is configured to have a concave curved outline in either the cross section shown in FIG. 4 or the cross section shown in FIG. 5, but only on one of the cross sections. You may comprise so that it may have a concave curvilinear outline (for example, cylindrical surface shape). Moreover, in the said structure, although the inner surface of the optical window 313 is comprised by the convex shape along the outer surface 313a, the inner surface may be comprised flat. Further, in the above configuration, although it is configured in a concave curved surface shape, the entire configuration is configured in a concave hole shape having a U-shaped outline, and for example, the finger 1 is configured to be dropped into the concave hole and operated. It doesn't matter.

  FIG. 6 is a schematic longitudinal sectional view showing the configuration of still another optical detection unit 412, and FIG. 7 is a schematic longitudinal sectional view showing a cross section orthogonal to FIG. 6. The optical detection unit 412 includes a light source 414, an optical component 415, and an optical sensor 416 similar to any of the above configurations, but the configuration described above in that the outer surface 413a of the optical window 413 is configured in a convex shape. Is different. The outer surface 413a has a convex curved surface shape, more specifically, a convex spherical surface shape. In the illustrated example, the optical window 413 has substantially the same thickness as a whole, and not only the outer surface 313a but also the inner surface is formed in a convex shape (convex curved surface shape or convex spherical shape).

  In this optical detection unit 412, when the finger 1 is brought into contact with the outer surface 413 a of the convex-curved optical window 413, the contact portion on the surface of the finger 1 is naturally concave, and a wider range can be easily brought into contact with the outer surface 413 a. To be able to. That is, the contact area between the finger 1 and the optical window 413 can be increased without strongly pressing the finger 1 against the optical window 413. Also, since the contact portion of the surface of the finger 1 with the optical window 413 is naturally concave (concave curved surface or concave spherical shape), the light reflected by the contact portion of the finger 1 is detected by the optical sensor 416 as convergent light. Therefore, the reflected light can be efficiently captured as an image without being dissipated. For example, even if the light receiving area of the optical sensor 416 is limited, the reflected light from the contact portion can be reliably or more incident on the light receiving area. Then, as shown in FIGS. 6 and 7, the finger 1 can be easily slid according to the curvature of the outer surface 413a or rotated to twist, so that the surface state detected by the optical sensor 416 Can be easily changed, and operability can be improved.

  The curvature of the outer surface 413a of the optical window 413 is not limited in any way, but when mounted on a small portable device, the curvature radius is preferably in the range of 3 to 30 mm. If it is within this range, it can be easily operated with the finger 1 and image information to be detected by the optical sensor 416 can be sufficiently obtained. If it falls below the above range, it becomes difficult to ensure a sufficient surface area of the finger 1 that contacts the outer surface 413a, so that the amount of image information detected by the optical sensor 416 is insufficient, and good detection becomes difficult. On the contrary, if it exceeds the above range, the radius of curvature of the outer surface 413a becomes too large, and it becomes difficult to obtain the effect of configuring the outer surface 413a in a convex shape.

  In the optical detection unit 412, the outer surface 413 a is formed in a convex spherical shape, and is configured to have a convex curved contour in either the cross section shown in FIG. 6 or the cross section shown in FIG. 7. It may be configured so as to have only a convex curved outline (for example, in a cylindrical surface shape). Moreover, in the said structure, although the inner surface of the optical window 413 is also comprised by the concave shape along the outer surface 413a, the inner surface may be comprised flat. Further, in the above configuration, although it is configured in a convex curved surface shape, it is configured in a convex shape having a U-shaped outline in the longitudinal section, and for example, the finger 1 is operated so as to contact the surface of the convex portion. You may comprise.

  FIG. 8 is a longitudinal sectional view showing the structure of another optical detection unit 512 different from the above. The optical detection unit 512 includes an optical surface 513, a light source 514, and an optical component 515 similar to any of the above-described configurations. However, it differs from the said structure by the point which uses the imaging device 516 provided in the apparatus main body as an optical sensor. The photographing apparatus 516 is configured to photograph an external landscape or a person through the optical window 513, and includes a photographing optical system 516A including one or a plurality of lenses, a CCD sensor, a CMOS sensor, and the like. And an optical sensor 516B. The optical sensor 516B preferably has hundreds of thousands to millions of pixels or more.

  When normal imaging is performed using the imaging device 516, the light emission of the light source 514 is stopped, the external light incident through the optical window 513 is condensed by the imaging optical system 516A, and an image is acquired by the optical sensor 516B. . On the other hand, when the operation is performed with the finger 1 as shown in FIG. 8, a switch (not shown) is operated, or a capacitance element is formed in the optical window 513, thereby detecting the contact between the finger 1 and the optical window 513. The light source 514 is turned on by the switching operation that occurs by performing the operation, and the surface state of the finger 1 is acquired as an image by the optical sensor 516B.

  Here, in order to capture the surface mode of the finger 1 more reliably, the focal length of the imaging optical system 516A is changed in accordance with the switching operation, and the image on the outer surface of the optical window 513 can be directly captured by the optical sensor 516B. It is preferable to configure. In addition, instead of changing the focal length of the photographing optical system 516A, the image detected by the optical sensor 516B is processed by an image processing means such as an image processing circuit to be described later, and the surface of the finger 1 on the outer surface of the optical window 513 The mode may be calculated. This is because, for example, the relationship between the reference mode on the outer surface of the optical window 513 and the optical characteristics of the photographing optical system 516A is measured in advance as a filter characteristic, and an actual photographed image is subjected to inverse filter processing of this filter characteristic. Can be executed by.

  FIG. 9 is a schematic configuration diagram schematically showing the configuration of the optical coordinate input device 101 of the present embodiment. The optical coordinate input device 101 captures the output of the optical detection unit 112, the control unit 102, the timing circuit 103 that generates a timing signal, the light source driving unit 104 that drives the light source 114, and the optical sensor 116. An image input unit 105, an image processing unit 106 that processes an image captured by the image input unit 105, and coordinate calculation that calculates coordinate information based on image data output from the image processing unit 106 and outputs the coordinate information to the control unit 102 Unit 107 and a signal output unit 108 that outputs a coordinate signal based on a control signal from the control unit 102.

  The control unit 102 controls the light source driving unit 104 to turn on and off the light source 114, adjust the luminance of the light source 114 if necessary, and appropriately process the coordinate information output from the coordinate calculation unit 107. A control signal associated with the coordinate information is output to the signal output unit 108. The control unit 102 may be configured by a dedicated control circuit or MPU (microprocessor unit) of the optical coordinate input device 101, but may also be configured by an MPU that controls the entire device body.

  The timing circuit 103 includes an oscillation circuit including a crystal resonator, and sends a predetermined timing signal (for example, a clock signal) to the control unit 102, the image input unit 105, the image processing unit 106, and the coordinate calculation unit 107. Each unit operates periodically based on the supplied timing signal.

  Based on the control signal output from the control unit 102, the light source driving unit 104 supplies and stops power to the light source 114 using the drive signal. This drive signal is provided with a gradation value for realizing a desired luminance in the light source 114 as necessary.

  The image input unit 105 includes an image memory of a predetermined size, generates an image signal of a predetermined format based on the detection signal output from the optical sensor 116, and sends the image signal to the image processing unit 106. The image processing unit 106 generates image data corresponding to the surface mode of an object such as the finger 1 on the outer surface of the optical window 113 based on the image signal. The image data is generated by cutting out an image portion corresponding to the surface aspect or replacing image data other than the image portion. This is because the image portion is determined by measuring a range of brightness based on the reflected light of an object (such as the finger 1) that contacts the outer surface of the optical window in advance, and setting a predetermined range set based on the range of brightness. It may be performed by comparing the lightness and hue of the image signal using a predetermined threshold value using a threshold value, or a portion where the lightness and hue space change rate in the image signal is large is used as the boundary line of the image portion. You may carry out by the method of detecting. The image processing unit 105 and the image processing unit 106 constitute an image processing unit according to the present invention.

  Based on the image data output from the image processing unit 106, the coordinate calculation unit 107 determines the moving direction and moving amount (moving speed) of the surface mode of the object such as the finger 1 (the portion in contact with the outer surface of the optical window 113). calculate. This is done by specifying the position of the surface feature by pattern recognition of the surface feature and determining how much and in which direction it has moved based on the time change manner of this position. Then, coordinate information corresponding to the moving direction and moving amount is sent to the control unit 102 as a control signal. Here, the coordinate information may be composed of data that directly reflects the movement direction and the movement amount, or another data having a one-to-one correlation with the movement direction and the movement amount (for example, determined in advance). Or an identification code that can be converted into a movement direction and a movement amount by the correlation table.

  Based on the coordinate information, the control unit 102 generates a control signal corresponding to an operation of a pointer or a cursor displayed on the display screen, for example, and sends the control signal to the signal output unit 108. Here, for example, smoothing processing of pointer operation, data conversion corresponding to the display position of the cursor, and the like are performed.

  Based on the control signal of the control unit 102, the signal output unit 108 sends a coordinate signal to the display body 122 (actually, the driver circuit of the display body 122) and the display control circuit of the device body, and thereby the pointer and cursor are displayed. Operation is controlled. The control unit 102, the coordinate calculation unit 107, and the signal output unit 108 correspond to the coordinate signal output unit of the present invention.

  In the optical coordinate input device 101 of this embodiment, the optical detection units 212, 312, 412, 512 having other configurations instead of the optical detection unit 112, and combinations of these parts are appropriately changed. Various units may be used.

  According to the optical coordinate input device of the present invention, the apparatus main body can be compactly configured and can be easily operated with fingers. That is, since a complicated structure is not required, there is no structural hindrance to downsizing, and even if the downsizing is performed, detection sensitivity is not deteriorated by performing image processing and coordinate calculation processing. Furthermore, since it is only necessary to move a finger or the like in contact with the optical window or change the posture, the operability can be maintained even if the size is reduced.

  It should be noted that the optical coordinate input device and the portable electronic device of the present invention are not limited to the illustrated examples described above, and can be variously modified without departing from the scope of the present invention. .

1 is a schematic perspective view showing an appearance of an electronic apparatus equipped with an optical coordinate input device according to an embodiment. The expanded partial longitudinal cross-sectional view which shows the structure of the optical detection unit of embodiment. The expanded partial longitudinal cross-sectional view which shows the structure of a different optical detection unit. Furthermore, the expanded partial longitudinal cross-sectional view which shows the structure of a different optical detection unit. The expanded partial longitudinal cross-sectional view which shows the cross-sectional structure orthogonal to FIG. 4 of the optical detection unit shown in FIG. The expanded partial longitudinal cross-sectional view which shows the structure of another optical detection unit. The expanded partial longitudinal cross-sectional view which shows the cross-sectional structure orthogonal to FIG. 6 of the optical detection unit shown in FIG. The expanded partial longitudinal cross-sectional view which shows the structure of another optical detection unit. 1 is a schematic configuration diagram illustrating an overall configuration of an optical coordinate input device according to an embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Electronic device, 110 ... Operation part, 111 ... Circuit board, 112 ... Optical detection unit, 133 ... Optical window, 114 ... Light source, 115 ... Optical component, 116 ... Optical sensor, 101 ... Optical coordinate input device, 102 ... Control unit 103 ... Timing circuit 104 ... Light source driving unit 105 ... Image input unit 106 ... Image processing unit 107 ... Coordinate calculation unit 108 ... Signal output unit 120 ... Display unit 121 ... Circuit board 122 ... Display body, 122a ... display screen

Claims (5)

  A coordinate input device incorporated in an apparatus main body, an optical window exposed on the outer surface of the apparatus main body, a light source for irradiating illumination light from the inside toward the optical window, and a reflected light of the illumination light are detected An optical sensor that outputs image data corresponding to a surface aspect of the object on the optical window based on an output of the optical sensor, and the movement based on the image data output by the image processing means An optical coordinate input device comprising: coordinate signal output means for outputting a coordinate signal according to an aspect.   The optical coordinate input device according to claim 1, wherein an outer surface of the optical window is concavely curved.   The optical coordinate input device according to claim 1, wherein an outer surface of the optical window is curved in a convex shape.   4. The optical coordinate input according to claim 1, wherein the image processing unit extracts and outputs only an image of a surface portion of the object that is in contact with an outer surface of the optical window. 5. apparatus. The portable electronic device carrying the optical coordinate input device as described in any one of Claims 1 thru | or 4.

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