JP5220885B2 - Optical pointing device and electronic apparatus equipped with the same - Google Patents

Description

  The present invention relates to an optical pointing device that can be mounted on a portable information terminal such as a mobile phone as an electronic device, and an electronic device including the same, and more particularly, an optical pointing device that is less affected by stray light and the same. Related to electronic equipment.

  In a small electronic device typified by a portable information terminal such as a cellular phone or PDA (Personal Digital Assistants), a keypad is generally employed as a user interface for inputting information. The keypad is usually composed of a plurality of buttons for inputting numbers and characters and direction buttons (cross keys). Further, in recent years, with the display of graphics and the like being possible on the display unit of a portable information terminal, a GUI (Graphical User Interface) that uses the display unit in two dimensions is mainly used as a method for displaying information to the user. It has come to be.

  As described above, since the portable information terminal has high functionality and has a display function equivalent to that of a computer, the input means of the conventional portable information terminal that uses the menu key and other function keys as direction keys are expressed in GUI. It was inconvenient because it was not suitable for selecting icons. For this reason, a portable information terminal is required to have a pointing device that enables intuitive operation, such as a mouse such as a ball-type mouse or an optical mouse used in computers, a touch pad, or a tablet. ing.

  However, since the portable information terminal is assumed to be carried, there is a problem in adopting a separate pointing device separated from the main body as the pointing device of the portable information terminal. In addition, for example, a track ball-type pointing device occupies a three-dimensional space that is physically larger than a certain level, and thus has a problem that it is difficult to adopt it for a thin and small portable information terminal.

  Therefore, as a pointing device that can be mounted on a portable information terminal, the fingerprint of a finger as a subject that contacts the pointing device is observed with an image sensor, and the movement of the subject's fingerprint on the contact surface is extracted to thereby detect the movement of the subject. An optical pointing device for detection has been proposed. For example, in an optical pointing device disclosed in Patent Document 1, a subject on a contact surface is irradiated with a light source such as an LED, and light scattered from the subject is condensed on an image pickup device by a condenser lens, and an image of the subject is obtained. Images are continuously captured by an image sensor such as an image sensor, the amount of change in the image data taken immediately before is extracted, the subject's movement is calculated based on the amount of change, and the subject's movement is used as an electrical signal. Output. By using this optical pointing device, the cursor or the like shown on the display can be moved in accordance with the movement of the subject.

  Since the optical system of the optical pointing device 100 for a portable terminal disclosed in Patent Document 1 performs high-precision assembly, as illustrated in FIG. A light emitting means (not shown) provided in the accommodation hole 111, a pair of prisms 121 provided in the accommodation hole 111 and integrated to collect light of the light emitting means, and the pair of prisms 121 are arranged. A condensing member 120 including a condensing lens 122 and an image sensor (not shown) that images light passing through the condensing member 120 and calculates a displacement value are included. The condensing member 120 is coupled to the condensing lens 122 so that the condensing lens 122 can maintain a stable installation state in the pair of prisms 121, and a miscellaneous light blocking hole (aperture) 123a that filters miscellaneous light (stray light). A lens fixing holder 123 including

JP 2008-226224 A (published September 25, 2008)

  However, the conventional optical pointing device 100 disclosed in Patent Document 1 has the following problems.

  First, the condensing lens 122, the lens fixing holder 123, and the prism 121 are provided separately, and thus there is a problem that the assemblability is poor, it is difficult to improve accuracy, and the cost is increased. ing.

  In addition, the optical pointing device 100 disclosed in Patent Document 1 has no problem because it does not employ an LGA structure in which the light source and the sensor are mounted on a single substrate, but in order to improve assemblability and environmental resistance. When the LGA structure is adopted for the light source, it is necessary to shield light between the light source and the sensor.

  The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to improve accuracy and cost by improving assemblability and to provide an optical pointing device with excellent light shielding performance and The object is to provide an electronic device equipped with the same.

  In order to solve the above problems, an optical pointing device of the present invention includes a light source that irradiates light on a subject, an optical cover that guides reflected light from the subject, and light guided by the optical cover. An optical pointing device comprising: an image sensor that receives light; and a light shielding cover that shields stray light that is light other than reflected light from the subject with respect to the image sensor. A contact surface that comes into contact with an imaging element that guides guided light to the image sensor is integrally formed, and the light source and the image sensor are disposed on the opposite side of the contact surface of the optical cover. In addition, the light shielding cover includes a diaphragm opening that acts as a diaphragm for the light from the imaging element to the imaging element, and a first that shields incident light from the light source to the imaging element among the stray light. Shading When, it is characterized in that the second shielding wall that shields the incident light to the imaging device from outside of the optical cover of the stray light is formed. In the present invention, for example, an imaging reflecting mirror or an imaging lens can be used as the imaging element.

  According to the above invention, the optical pointing device includes a light source that irradiates a subject with light, an optical cover that guides reflected light from the subject inside, and imaging that receives light guided by the optical cover. And a light shielding cover for shielding stray light that is light other than reflected light from the subject.

  In the present invention, the optical cover is integrally formed with a contact surface with which the subject comes in contact and an imaging element that guides the guided light to the imaging element. For this reason, since the imaging element and the optical cover are not separate from each other, the work of arranging the imaging element with the optical axis adjusted so that the light guided through the optical cover is guided to the imaging element can be omitted. . As a result, it is possible to improve the assemblability and to achieve high accuracy and low cost.

  Here, in the present invention, the light source and the imaging device are disposed on the side opposite to the contact surface of the optical cover. As a result, it is necessary to shield between the light source and the image sensor. In addition, it is necessary to shield light incident on the image sensor from the outside.

  Therefore, in the present invention, the light shielding cover includes a first light shielding wall that shields incident light from the light source to the imaging element among stray light, and shields incident light from the outside of the optical cover to the imaging element among the stray light. A second light shielding wall is formed. For this reason, the first light shielding wall and the second light shielding wall can shield stray light, which is light other than the reflected light from the subject, from the image sensor. The light shielding cover is formed with a diaphragm opening that acts as a diaphragm for the light from the imaging element to the imaging element, so that the light guided by the optical cover passes through the imaging element through the imaging element. It is possible to receive light by guiding to

  Therefore, it is possible to provide an optical pointing device with excellent light-shielding performance as well as high accuracy and low cost by improving assembly.

  In the optical pointing device of the present invention, the optical cover has an imaging lens that is an imaging element that guides reflected light from the guided light to the imaging element, and guides light from the light source to the subject. It can be assumed that the first illumination lens is integrally formed.

  Thereby, the reflected light from the light-guided subject can be guided to the imaging device using the imaging lens as the imaging device formed integrally with the optical cover. In the present invention, the first illumination lens for guiding the light from the light source to the subject is integrally formed on the optical cover. For this reason, the light from the light source can be condensed and guided to the subject by the first illumination lens. Further, since the imaging lens and the first illumination lens are formed integrally with the optical cover, the assembling property is excellent, and high accuracy and low cost can be achieved.

  In the optical pointing device of the present invention, a package in which the light source and the image sensor are mounted on a substrate and sealed with a sealing resin is provided, and light from the light source is included in the sealing resin of the package. It can be assumed that the second illumination lens that guides the light to the subject is integrally formed.

  As a result, since the second illumination lens for guiding the light from the light source to the subject is integrally formed on the sealing resin of the package, the light from the light source is collected on the subject by the second illumination lens. Can be guided by light. In addition, since the second illumination lens is integrally formed with the sealing resin of the package, the second illumination lens is excellent in assemblability, and high accuracy and low cost can be achieved.

  In order to solve the above problems, an electronic apparatus according to the present invention includes the optical pointing device.

  According to the above invention, it is possible to provide an electronic apparatus including an optical pointing device with excellent light-shielding performance as well as improving accuracy and cost by improving assembly.

  As described above, in the optical pointing device of the present invention, the optical cover is integrally formed with the contact surface with which the subject contacts and the imaging element that guides the guided light to the imaging element. The imaging element is disposed on the opposite side of the contact surface of the optical cover, and the light shielding cover has a diaphragm opening that acts as a diaphragm for light from the imaging element to the imaging element, Of stray light, a first light shielding wall that shields incident light from the light source to the image sensor and a second light shielding wall that shields incident light from the outside of the optical cover to the image sensor from the outside of the optical cover are formed. It is.

  As described above, the electronic apparatus according to the present invention includes the optical pointing device.

  Therefore, it is possible to increase the accuracy and cost by improving the assemblability, and to provide an optical pointing device with excellent light shielding performance and an electronic device including the same.

(A) shows one Embodiment of the optical pointing device in this invention, Comprising: It is the sectional view on the AA line of FIG. 3 which shows the structure of an optical pointing device, (b) is the said optical pointing device. FIG. 4 is a sectional view taken along line BB in FIG. 3 showing the configuration. (A) is a perspective view which shows the structure seen from the upper side of the said optical pointing device, (b) is a disassembled perspective view which shows the structure of the said optical pointing device. It is a top view which shows the structure of the said optical pointing device. It is a perspective view which shows the structure of LGA in the said optical pointing device. (A) is a perspective view which shows the structure seen from the upper side of the light shielding cover, (b) is a perspective view which shows the structure seen from the bottom face side of the light shielding cover. (A) is a perspective view which shows the structure seen from the upper side of the optical cover, (b) is a perspective view which shows the structure seen from the bottom face side of the optical cover. (A) is sectional drawing which shows irradiation light at the time of illuminating the detection area of a contact surface using only the 2nd illumination lens provided in the LGA side, (b) is intensity distribution of the detection area at that time FIG. (A) is a sectional view showing irradiation light when the detection area is illuminated using the first illumination lens provided on the optical cover in addition to the second illumination lens provided on the LGA side; (B) is a top view which shows intensity distribution of the detection area at that time. FIG. 5 is a cross-sectional view showing another embodiment of the optical pointing device according to the present invention and showing the configuration of the optical pointing device. (A) shows one Embodiment of the electronic device provided with the optical pointing device in this invention, Comprising: It is a front view which shows the external appearance of a mobile telephone, (b) is the back surface which shows the external appearance of the said mobile telephone It is a figure and (c) is a side view which shows the external appearance of the said mobile telephone. It is a disassembled perspective view which shows the structure of the conventional optical pointing device.

  An embodiment of the present invention will be described by taking an optical pointing device using an LED (Light Emitting Diode) as a light source as an example. The optical pointing device of the present invention detects the movement of a subject by irradiating a subject such as a fingertip with light and receiving light reflected from the subject. Hereinafter, the configuration of the optical pointing device of each embodiment will be specifically described. In addition, about the member which shows the same function and effect | action, the same code | symbol is attached | subjected and description is abbreviate | omitted.

[Embodiment 1]
The configuration of the optical pointing device according to the present embodiment will be described with reference to FIGS. FIG. 1A shows the configuration of the optical pointing device 1A in the present embodiment, which is a cross-sectional view taken along the line AA of FIG. 3, and FIG. 1B shows the configuration of the optical pointing device 1A. FIG. 4 is a cross-sectional view taken along line BB in FIG. 3. 2A is a perspective view showing the configuration of the optical pointing device 1A, and FIG. 2B is an exploded perspective view showing the configuration of the optical pointing device 1A. FIG. 3 is a plan view showing the configuration of the optical pointing device 1A. FIG. 4 is a perspective view showing a configuration viewed from the upper side of the LGA. FIG. 5A is a perspective view showing a configuration viewed from the upper side of the light shielding cover, and FIG. 5B is a perspective view showing a configuration viewed from the bottom side of the light shielding cover. FIG. 6A is a perspective view showing a configuration viewed from the upper side of the optical cover, and FIG. 6B is a perspective view showing a configuration viewed from the bottom side of the optical cover.

(Schematic configuration of optical pointing device)
As shown in FIGS. 2A and 2B and FIG. 3, the optical pointing device 1A of the present embodiment has an LGA (resin-sealed) by mounting a light source and an image sensor, which will be described later, on a substrate in order from the bottom. Land Grid Array) includes a semiconductor package 10 (hereinafter referred to as “LGA 10”), a light shielding cover 20, and an optical cover 30. Here, an LGA (Land Grid Array) semiconductor package is a semiconductor package having a mounting terminal referred to as a land in which planar electrode pads are arranged in a grid on the bottom surface of the package as an external connection terminal. Say.

  As shown in FIG. 4, the LGA 10 includes a substrate 11, a light source 12, an image sensor 13, a sealing resin 14, and a second illumination lens 15 formed of the sealing resin 14.

  The light shielding cover 20 shields the light from the light source 12 in a direction other than the specific direction, and covers the upper side of the LGA 10 as shown in FIG.

  As shown in FIG. 2B, the optical cover 30 covers the light shielding cover 20 and functions as a housing of the optical pointing device 1A, and also the light of the light source 12 with respect to the subject in contact with the surface. Is an optical member that guides the subject to the imaging element 13 with the reflected light from the subject as a surface. For this reason, as shown in FIGS. 6A and 6B, the optical cover 30 includes a contact surface 31 where a subject contacts the front surface, and a first illumination lens 32 and an imaging lens 33 on the back surface. .

  As shown in FIGS. 5A and 5B and FIGS. 6A and 6B, the light shielding cover 20 and the optical cover 30 are provided with a light shielding cover outer inclined wall 20A from the viewpoint of improving assemblability. 20B and 20C and the optical cover inner slope walls 30a, 30b, and 30c of the optical cover 30 that fits outside the light shielding cover outer slope walls 20A, 20B, and 20C are positioned in the XY directions so as to be auto-aligned. It is made with high accuracy. Note that the light shielding cover 20 and the LGA 10 may be mounted after being determined, or may be mounted so as to adjust the imaging light described later to the imaging element 13 as much as possible.

(Configuration of each part in the optical pointing device)
The configuration of each part in the optical pointing device 1A having the above-described appearance will be described below. Initially, the structure of LGA10 is demonstrated based on Fig.1 (a) (b). As shown in FIG. 1A, the depth direction of the optical pointing device 1A (the left-right direction in FIG. 1A) is the Y axis, and the direction from the light source 12 toward the image sensor 13 is the positive direction of the Y axis. To do. Further, as shown in FIG. 1B, the width direction of the optical pointing device 1A (the left-right direction in FIG. 1B) is the X axis, and the direction from the left side to the right side of the optical pointing device 1A is the positive axis of the X axis. The direction. Further, as shown in FIGS. 1 (a) and 1 (b), the thickness direction of the optical pointing device 1A (the vertical direction in FIGS. 1 (a) and 1 (b)) is taken as the Z axis, and the light pointing device 1A moves from the lower part to the upper part. The direction is the positive direction of the Z axis. Here, the positive direction of the Z axis is referred to as a vertical direction, and the positive direction of the Y axis is also referred to as a horizontal direction.

  In FIGS. 1A and 1B, the subject 2 that is in contact with the contact surface 31 of the optical cover 30 is a subject such as a fingertip, and the optical pointing device 1A detects the fingerprint movement of the finger. It is. Here, in order to make it easy to understand the state of the subject 2 with respect to the optical pointing device 1A, the subject 2 is shown small for convenience with respect to the optical pointing device 1A.

(LGA configuration)
First, as shown in FIGS. 1A and 1B, the LGA 10 has a light source 12 and an image sensor 13 mounted on a single substrate 11. The light source 12 and the image sensor 13 are electrically connected to the substrate 11 by wire bonding or flip chip mounting. A circuit is formed on the substrate 11. The circuit controls the light emission timing of the light source 12 or receives an electric signal output from the image sensor 13 to detect the movement of the subject 2. The substrate 11 is a planar material made of the same material, and is made of, for example, a printed circuit board or a lead frame.

  The light source 12 emits light toward the contact surface 31 of the optical cover 30. The irradiation light emitted from the light source 12 is diffused by the light source 12 via the second illumination lens 15 formed by the sealing resin 14 of the LGA 10 and the first illumination lens 32 formed on the optical cover 30. The light is condensed uniformly and with high intensity on the detection area 31 a and reaches the contact surface 31. Thus, the irradiation light L1 from the light source 12 is incident on the contact surface 31 from an oblique direction, that is, incident on the contact surface 31 at a certain incident angle.

  As will be described later, since the optical cover 30 is made of a material having a refractive index larger than that of air, a part of the irradiation light L1 reaching the contact surface 31 is part of the contact surface when the subject 2 is not on the contact surface 31. 31, and the remaining part is reflected by the contact surface 31. At this time, when the incident angle of the irradiation light L1 with respect to the contact surface 31 satisfies the condition of total reflection, the irradiation light L1 does not pass through the contact surface 31, but is reflected by the contact surface 31 and travels into the optical cover 30.

  On the other hand, when the subject 2 exists on the contact surface 31, the irradiation light L <b> 1 is reflected by the surface of the subject 2 in contact with the contact surface 31 and is incident on the optical cover 30. The light source 12 is realized by a light source such as an LED (Light Emitting Diode), and is preferably realized by an infrared light emitting diode with high luminance.

  The imaging device 13 receives reflected light L2 reflected by the subject 2 irradiated by the light source 12, forms an image on the contact surface 31 based on the received light, and converts it into image data. Specifically, the image sensor 13 is composed of an image sensor such as a CMOS (Complementary Metal Oxide Semiconductor) or a CCD (Charge Coupled Device). The image sensor 13 includes a DSP (Digital Signal Processor: calculation unit) (not shown), and captures the received reflected light L2 as image data into the DSP. The image sensor 13 continues to capture images on the contact surface 31 at regular intervals in accordance with instructions from the substrate 11.

  When the subject 2 in contact with the contact surface 31 moves, the image captured by the image sensor 13 is different from the image captured immediately before that. In the DSP, the image sensor 13 compares the values of the same portion of the captured image data with the immediately preceding image data, and calculates the movement amount and movement direction of the subject 2. That is, when the subject 2 on the contact surface 31 moves, the captured image data is image data indicating a value deviated from the image data captured immediately before by a predetermined amount. The imaging device 13 calculates the movement amount and movement direction of the subject 2 based on the predetermined amount in the DSP. The imaging device 13 outputs the calculated movement amount and movement direction to the substrate 11 as an electrical signal. Note that the DSP may be included in the substrate 11 instead of in the image sensor 13. In that case, the image sensor 13 transmits the captured image data to the substrate 11 in order.

  To summarize the processing of the image sensor 13, the image sensor 13 captures an image of the contact surface 31 when the subject 2 is not on the contact surface 31. Next, when the subject 2 comes into contact with the contact surface 31, the imaging element 13 captures an image of the surface of the subject 2 that is in contact with the contact surface 31. For example, when the subject 2 is a fingertip, the image sensor 13 captures an image of a fingertip fingerprint. Here, since the image data captured by the image sensor 13 is different from the image data when there is no subject 2 on the contact surface 31, the DSP of the image sensor 13 has the subject 2 on the contact surface 31. A signal indicating that is touching is transmitted to the substrate 11. When the subject 2 moves, the DSP calculates the movement amount and movement direction of the subject 2 compared to the image data captured immediately before, and transmits a signal indicating the calculated movement amount and movement direction to the substrate 11.

  The light source 12 and the imaging element 13 are sealed with a sealing resin 14 which is a translucent resin. The shape of the sealing resin 14 is a substantially rectangular parallelepiped. The bottom surface of the sealing resin 14 is in close contact with and in contact with the upper surface of the substrate 11, and concave portions that are in close contact with the light source 12 and the image sensor 13 are formed. As the translucent resin constituting the sealing resin 14, for example, a thermosetting resin such as a silicone resin or an epoxy resin, or a thermoplastic resin such as acrylic or polycarbonate is used.

  Thus, since the light source 12 and the image sensor 13 mounted on the substrate 11 are respectively sealed with the sealing resin 14, the substrate 11, the light source 12, the image sensor 13, and the sealing resin 14 are integrated. LGA 10 is formed. Therefore, the number of parts of the optical pointing device 1A can be reduced, and the number of assembly steps can also be reduced. Therefore, the manufacturing cost of the optical pointing device 1A can be reduced, and the optical pointing device 1A with high detection accuracy of the subject 2 can be realized.

(Configuration of optical cover)
Next, the configuration of the optical cover 30 constituting the optical pointing device 1A will be described in detail with reference to FIGS. 1 (a) and 1 (b) and FIG.

  The optical cover 30 protects each unit and each element constituting the optical pointing device 1A including the light source 12, the image pickup device 13, and the like.

  As shown in FIGS. 1A and 1B and FIGS. 6A and 6B, the optical cover 30 is positioned on the upper side of the light shielding cover 20, and the optical cover 30 of the light shielding cover 20 shown in FIGS. The light shielding cover outer slope walls 20A, 20B, and 20C and the light shielding cover upper surface 20D are in close contact with each other. In the present embodiment, the surface of the optical cover 30 on the negative side of the Z-axis that is not exposed to the outside when mounted on the light shielding cover 20 and formed as the optical pointing device 1A. This is referred to as the back surface of the optical cover 30.

  Further, the flange bottom surface 30 f of the optical cover 30 forms substantially the same plane as the bottom surface of the substrate 11 of the LGA 10. Further, the contact surface 31 of the optical cover 30, the bottom surface of the substrate 11, and the flange bottom surface 30 f of the optical cover 30 are parallel to each other, and both side surfaces of the optical cover 30 are the contact surface 31 of the optical cover 30 and the optical surface. The cover 30 is formed with a surface having a certain angle with respect to the flange bottom surface 30f. That is, as shown in FIGS. 1A and 1B, in the cross-sectional view of the optical pointing device 1A, the optical cover 30 has a trapezoidal shape. However, the optical cover 30 is not limited to this shape, and the side surface may be perpendicular to the flange bottom surface 30f.

  A flange 34 is provided in the vicinity of the bottom of the side surface of the optical cover 30, and the optical pointing device 1 </ b> A according to the present embodiment is mounted on an electronic device. Necessary as a pushbutton switch by restricting the force generated in the positive direction side of the Z axis by a leaf spring contact switch (not shown) provided on the bottom surface of the substrate of the LGA 10 at a certain position when pressed to the negative direction side of the shaft. Used to ensure a certain amount of stroke.

  The detection area 31a of the contact surface 31 in the optical cover 30 is a surface where the subject 2 is in contact with the optical pointing device 1A. The detection area 31 a of the contact surface 31 is located above the light source 12 on the upper surface of the optical cover 30.

  An imaging lens 33 and a first illumination lens 32 are formed on the back surface of the optical cover 30. The imaging lens 33 is formed with a Z-axis symmetric optical surface having a specific curvature in order to project the image of the subject 2 on the contact surface 31 onto the imaging device 13, and the substantially effective diameter of the optical surface. The outer portion is a lens that has an effect of acting as an aperture, that is, an aperture, an imaging lens by making the subject image a surface that cannot be projected onto the image sensor 13.

  Further, the first illumination lens 32 is formed with a toroidal surface having a different curvature with respect to the X-axis and the Y-axis, and interacts with the second illumination lens 15 to be described later, so that the light from the light source 12 is It has the effect of irradiating the detection area 31a of the subject 2 as uniformly as possible so as not to expand the irradiation area outside the detection area.

  The above operation will be described in detail with reference to FIGS. 7 (a) and 7 (b) and FIGS. 8 (a) and 8 (b). FIG. 7A is a cross-sectional view showing the irradiation light L3 when the detection area 31a of the contact surface 31 is illuminated using only the second illumination lens 15 provided on the LGA 10 side, and FIG. It is a top view which shows intensity distribution of the detection area 31a at that time. FIG. 8A shows the irradiation when the detection area 31a is illuminated using the first illumination lens 32 provided on the optical cover 30 in addition to the second illumination lens 15 provided on the LGA 10 side. It is sectional drawing which shows the light L1, FIG.8 (b) is a top view which shows intensity distribution of the detection area 31a at that time.

  First, as shown to Fig.7 (a), when the lens 32 for 1st illumination is not provided in the optical cover 30, the irradiation light L3 spreads out of the detection area 31a. As a result, as shown in FIG. 7B, the intensity distribution on the detection area 31 a is radiated from the light source 12 because the light intensity is graded mainly from the Y axis direction minus to the Y axis direction plus. Use efficiency of light is poor.

  On the other hand, as shown in FIG. 8A, in addition to the second illumination lens 15 provided on the LGA 10 side, the first illumination lens 32 provided on the optical cover 30 is also used to illuminate the detection area 31a. In this case, the irradiation light L1 does not spread so much outside the detection area 31a. As a result, the intensity distribution on the detection area 31a is such that the intensity of light is distributed concentrically as shown in FIG. 8B, and the intensity center of the light emitted from the light source 12 is within the detection area 31a. Incident. For this reason, the utilization efficiency of light is high and it can illuminate more brightly. Therefore, when an LED is used as the light source 12, the input current to the LED can be reduced, so that the battery usage time when the apparatus is mounted on a portable device can be extended. In addition, the irradiation light L1 is irradiated at the detection area 31a obliquely with the central portion of the intensity being made substantially parallel light. For this reason, when unevenness such as a fingerprint of a finger to be detected is illuminated, the brightness of the unevenness becomes clear, so that the detection sensitivity of the image sensor 13 is also improved.

  By the way, as a material which comprises the optical cover 30, when the wavelength of the light which the light source 12 irradiates is an infrared wavelength outside visible wavelength (for example, 800 nm or more), the material of the optical cover 30 transmits only infrared light. A visible light absorbing polycarbonate resin or acrylic resin may be used. By forming the optical cover 30 with such a material, visible light components can be blocked by the optical cover 30 from unnecessary light entering from the outside of the optical cover 30. When the design color is applied to the surface of the optical cover 30 that is the surface of the optical pointing device 1A, for example, only the wavelength band in a predetermined color such as green is reflected on the contact surface 31 of the optical cover 30, for example. It is only necessary to coat with a material having characteristics of transmitting other wavelengths. By coating the contact surface 31 of the optical cover 30 with a material having such characteristics, a desired color can be applied to the surface of the optical pointing device 1A without impairing the optical characteristics of the optical pointing device 1A.

(Configuration of shading cover)
Next, the configuration of the light shielding cover 20 constituting the optical pointing device 1A will be described in detail with reference to FIGS. 1 (a), 1 (b) and 5 (a), 5 (b).

  The light shielding cover 20 shields light from the light source 12 in a direction other than a specific direction, acts as a diaphragm (aperture) for the imaging lens 33, and performs optical pointing to the image sensor 13. It strays out stray light components such as sunlight and street lights and room lights incident from the outside of the apparatus 1A. Therefore, it is desirable that the light shielding cover 20 is made of a material having a light shielding performance such as polycarbonate containing black pigment or dye or opaque resin. As long as there is a light shielding performance, the metal may be painted black. However, in order to avoid the reflected light becoming stray light and reaching the image pickup device 13, a material that can absorb light is most preferable.

  As shown in FIGS. 1A, 1B, 4 and 5A, 5B, the light shielding cover 20 is located on the upper side of the LGA 10, and the resin outer surfaces 14A and 14B of the sealing resin 14 of the LGA 10. -A slight gap is left with respect to 14C, and the resin upper surface 14E is in close contact with each other. The light shielding cover upper surface 20D of the light shielding cover 20 and the light shielding cover back bottom surface 20d that is in contact with the resin upper surface 14E of the LGA 10 are substantially parallel to each other. Stray light incident from the outside of the optical pointing device 1A including the light shielding cover skirt portion 22 as the second light shielding wall formed by the light shielding cover back slopes 20a, 20b, and 20c respectively facing the 20B and 20C; And the light from the light source 12 that is reflected on the surface of the optical cover 30 including the contact surface 31 of the optical cover 30 and is mainly provided to shield stray light that does not include the image of the subject 2 as a signal component. . Note that the light shielding cover skirt portion 22 is not formed on the light shielding cover 20 corresponding to the resin outer surface 14D of the sealing resin 14 of the LGA 10. However, by using the optical pointing device 1A so that the base of the finger of the subject 2 comes to this part, the base of the finger and the human body are caused by outside light (sunlight, street light, indoor light). Since the stray light is cut and the propagation distance of the stray light from the light source 12 through the optical cover 30 is the longest, most of the light is attenuated and incident on the image sensor 13, so there is no problem even if it is not formed. . By not forming this portion, the projected area in the XY direction of the optical pointing device 1A can be reduced. However, stray light from the light source 12 through the optical cover 30 is not zero, and depending on the intensity of light emitted from the light source 12, the influence may not be negligible. The portion 22 may be formed.

  Further, the light shielding cover first protrusion 20e as the first light shielding wall provided on the back surface of the light shielding cover 20 enters the light shielding cover recess 14F provided in the sealing resin 14 of the LGA 10 and is mainly sealed from the light source 12. The stray light that directly enters the image sensor 13 is shielded through the resin slope 14G of the resin 14. Further, the light shielding cover second protrusion 20f provided on the back surface of the light shielding cover 20 shown in FIG. 5B is formed on the light shielding cover 20 out of the irradiation light emitted from the light source 12 through the second illumination lens 15. Light other than entering the first illumination lens 32 provided in the optical cover 30 through the provided light shielding cover hole 20E is shielded as stray light so as not to enter the optical cover 30.

  Moreover, the aperture 21 as the aperture opening shown in FIGS. 1A and 1B acts as an aperture, that is, a lens aperture, with respect to the imaging lens 33 that projects the image of the subject 2 onto the image sensor 13. Originally, the imaging lens 33 has a surface having no imaging effect on a portion outside the effective diameter on the curved surface acting on the imaging as described above, and this portion acts as a stop, but the light is blocked. However, since this aperture 21 has a light shielding ability, it can cut stray light.

(Assembly method of optical pointing device)
Next, a method for assembling the optical pointing device 1A of the present embodiment will be described.

  First, as described above, the optical cover 30 and the light shielding cover 20 are assembled by auto-alignment by bringing their inclined surfaces into contact with each other. In this case, the optical cover bottom surface 30d of the optical cover 30 and the light-shielding cover upper surface 20D of the light-shielding cover 20 are not completely in close contact with each other, and auto-alignment is not possible unless a configuration with a gap of about 0 to 50 μm is provided. Further, by putting an adhesive in this gap, the optical cover 30 and the light-shielding cover 20 are fixed by auto-curing after auto-alignment, and at the same time, the contact surface 31 of the optical cover 30 is removed by eliminating the gap. It is possible to prevent the optical cover 30 from being bent and cracked by being pressed by the finger of the subject 2. In addition to the method of contacting the inclined surfaces, the automatic alignment is performed by making the inclined surfaces vertical, providing the optical cover 30 with slits, providing the light shielding cover 20 with protrusions, and inserting the protrusions into the slits. It doesn't matter how. In this case, since the optical cover bottom surface 30d and the light shielding cover upper surface 20D can be brought into close contact with each other, the contact surface 31 of the optical cover 30 is pressed by the finger of the subject 2 without filling the gap by the adhesive. It is possible to prevent the optical cover 30 from being bent and cracking.

  Thereafter, the LGA 10 is mounted so that the resin upper surface 14E of the sealing resin 14 of the LGA 10 and the light shielding cover upper surface 20D of the light shielding cover 20 are in contact with each other, and the flange bottom surface 30f of the flange 34 in the optical cover 30 and the FPC (not shown) are connected. It fixes by putting an adhesive agent in the clearance gap formed by the resin outer side surface 14A * 14B * 14C of the sealing resin 14, and the light shielding cover back bevel 20a * 20b * 20c of the light shielding cover 20. FIG. At the time of fixing, a contact surface may be provided for the resin hole 14F formed in the sealing resin 14 of the LGA 10 and the light shielding cover first protrusion 20e formed on the back surface of the light shielding cover 20 to make a decision. Alternatively, the position of the LGA 10 is temporarily fixed, the position of the optical cover 30 to which the light shielding cover 20 is fixed is slid in the X and Y directions, and the subject is placed on the image sensor 13 while monitoring the signal output from the image sensor 13. You may adjust to the position where the 2 image is projected most.

  As described above, the optical pointing device 1A of the present embodiment is guided by the light source 12 that irradiates the subject 2 with light, the optical cover 30 that guides the reflected light from the subject 2 inside, and the optical cover 30. An image sensor 13 that receives the reflected light, and a light shielding cover 20 that shields stray light that is light other than the reflected light from the subject 2 with respect to the image sensor 13.

  In the present embodiment, the optical cover 30 is integrally formed with a contact surface 31 with which the subject 2 contacts and an imaging lens 33 that guides the guided light to the image sensor 13. For this reason, since the imaging lens 33 and the optical cover 30 are not separate from each other, the optical axis of the imaging lens 33 is adjusted so that the light guided through the optical cover 30 is guided to the image sensor 13. The work of arranging can be omitted. As a result, it is possible to improve the assemblability and to achieve high accuracy and low cost.

  By the way, in the present embodiment, the light source 12 and the image sensor 13 are disposed on the side opposite to the contact surface 31 of the optical cover 30. As a result, it is necessary to shield between the light source 12 and the image sensor 13. Further, it is necessary to shield light incident on the image sensor 13 from the outside.

  Therefore, in the present embodiment, the light shielding cover 20 includes the light shielding cover first protrusion 20e that shields incident light from the light source 12 to the image sensor 13 among stray light, and the image sensor 13 from the outside of the optical cover 30 among stray light. A light shielding cover skirt portion 22 that shields light incident on the light is formed. For this reason, stray light that is light other than the reflected light from the subject 2 can be shielded from the imaging element 13 by the light shielding cover first protrusion 20 e and the light shielding cover skirt portion 22. The light shielding cover 20 is formed with an aperture 21 that acts as a diaphragm for the light from the imaging lens 33 to the image sensor 13, so that the light guided by the optical cover 30 is passed through the aperture 21. It is possible to receive the light by guiding it to the image pickup device 13 via.

  Therefore, it is possible to provide an optical pointing device 1A with excellent light-shielding performance as well as improving accuracy and cost by improving assembly.

  Further, in the optical pointing device 1A of the present embodiment, the optical cover 30 includes an imaging lens 33 that is an imaging element that guides reflected light from the guided subject 2 to the imaging element 13, and the light source 12. The first illumination lens 32 that guides the light to the subject 2 is integrally formed.

  Thereby, the reflected light from the subject 2 to be guided can be guided to the imaging element 13 using the imaging lens 33 as an imaging element formed integrally with the optical cover 30. In the present embodiment, the first illumination lens 32 that guides the light from the light source 12 to the subject 2 is formed integrally with the optical cover 30. For this reason, the light from the light source 12 can be condensed and guided to the subject 2 by the first illumination lens 32. Further, since the imaging lens 33 and the first illumination lens 32 are formed integrally with the optical cover 30, it is excellent in assembling property, and high accuracy and low cost can be achieved.

  Further, in the optical pointing device 1A of the present embodiment, the LGA 10 in which the light source 12 and the imaging element 13 are mounted on the substrate 11 and sealed with the sealing resin 14 is provided, and the sealing resin 14 of the LGA 10 is provided. The second illumination lens 15 for guiding the light from the light source 12 to the subject 2 is integrally formed.

  Thereby, since the second illumination lens 15 for guiding the light from the light source 12 to the subject 2 is integrally formed in the sealing resin 14 of the LGA 10, the second illumination lens 15 causes the light from the light source 12. Light can be condensed and guided to the subject 2. Further, since the second illumination lens 15 is formed integrally with the sealing resin 14 of the LGA 10, it is excellent in assembling property, and high accuracy and low cost can be achieved.

[Embodiment 2]
The following will describe another embodiment of the present invention with reference to FIG. The configurations other than those described in the present embodiment are the same as those in the first embodiment. For convenience of explanation, members having the same functions as those shown in the drawings of the first embodiment are given the same reference numerals, and explanation thereof is omitted.

  The optical pointing device 1A includes an imaging lens 33, a second illumination lens 15, and a first illumination lens 32. However, the optical pointing device 1B of the present embodiment uses an optical cover 60 having a light guide type optical system, and is different in that there is no lens corresponding to the second illumination lens 15.

  In the optical pointing device 1B of the present embodiment, as shown in FIG. 9, the LGA 40 is the same except that there is no lens corresponding to the second illumination lens 15 in the LGA 10. Since the optical pointing device 1B is configured for the purpose of reducing the thickness in the Z direction, the lens is eliminated, but there is no problem even if it exists.

  The optical cover 60 is greatly different in configuration from the optical cover 30 of the first embodiment. The contact surface 61 is a surface on which the subject 2 is in contact with the optical pointing device 1B. The detection area 61 a of the contact surface 61 is located above the light source 12 on the upper surface of the optical cover 60. Further, a bending element 62 is provided in place of the first illumination lens 32 of the optical cover 30. The bending element 62 is a prism, and is formed in a concave portion on the back surface of the optical cover 60 that is located above the light source 12 and below the contact surface 61 and is located on the back surface of the optical cover 60 that does not contact the LGA 40. Forming. The bending element 62 is formed with a bending element inclined surface 62a, and a narrow angle formed by the bending element inclined surface 62a and the upper surface of the optical cover 60 is defined as an inclination angle θ. The bending element 62 refracts the irradiation light L1 emitted from the light source 12 at the bending element inclined surface 62a and converts the path of the irradiation light L1 so as to go to the subject 2. Further, the bending element 62 totally reflects the reflected light L2 reflected from the subject 2 by the bending element inclined surface 62a, and converts the path of the reflected light L2 in the positive direction of the Y axis inside the optical cover 60. It is. The reflected light L2 reflected from the subject 2 that has been totally reflected by the bending element inclined surface 62a is directed to a reflecting surface 63 to be described later. Thus, the bending element inclined surface 62a transmits the irradiation light L1 and totally reflects the reflected light L2. Therefore, a material having a refractive index larger than the refractive index of the space between the optical cover 60 and the LGA 40 above the light source 12 is used for the optical cover 60.

  For example, the optical cover 60 may be made of a visible light absorption type polycarbonate resin or acrylic resin having a refractive index of about 1.5, and the space may be an air layer. That is, an aluminum reflective film or the like is not deposited on the bending element inclined surface 62a in order to totally reflect the reflected light L2.

  Next, in the present embodiment, an imaging reflecting mirror 64 as an imaging element is provided instead of the imaging lens 33 of the first embodiment.

  The imaging reflecting mirror 64 reflects the reflected light L2 from the subject 2 and forms an image of the subject 2 on the image sensor 13. The imaging reflecting mirror 64 is located above the image sensor 13 and on the positive side of the Y axis with respect to the image sensor 13, and is located on the back surface of the optical cover 60 that is not in contact with the LGA 40. Are formed. For example, a toroidal surface having different curvatures in two orthogonal directions is formed on the imaging reflector 64. The imaging reflecting mirror 64 reflects the reflected light L <b> 2 so as to form an image on the image sensor 13 by the toroidal surface. In order to efficiently reflect the reflected light L2 at the imaging mirror 64, for example, a metallic reflective film such as aluminum, nickel, gold, silver, or a dielectric dichroic film is formed on the toroidal surface of the imaging mirror 64. Evaporate.

  In the above description, the imaging reflector 64 is formed with, for example, a toroidal surface. However, the present invention is not limited to this. For example, the imaging reflector 64 is a reflector such as a spherical surface or an aspheric surface. Any material that can form an image can be used.

  The reflecting surface 63 causes the reflected light L2 totally reflected by the bending element inclined surface 62a to be incident on the imaging reflecting mirror 64, and the reflected light L2 reflected from the imaging reflecting mirror 64 is incident on the imaging device 13. The reflected light L2 is reflected. The reflection surface 63 is located above the image sensor 13 and on the upper surface of the optical cover 60. The reflection surface 63 is formed by depositing a reflection film on the upper surface of the optical cover 60. Since the reflective film forming the reflective surface 63 is exposed to the outside and can be seen well by the user, it is desirable to make the film as inconspicuous as possible in appearance. For example, when the wavelength of light emitted from the light source 12 is an infrared wavelength outside the visible wavelength (for example, 800 nm or more), the reflective film forming the reflective surface 63 is red in the wavelength band of 800 nm or more emitted from the light source 12. Any device that reflects external light and transmits light having a visible wavelength band of 800 nm or less may be used. Thus, the reflected light L2 from the subject 2 can be efficiently reflected by appropriately setting the wavelength of the light emitted from the light source 12 and the reflectance and transmittance characteristics of the reflective film forming the reflective surface 63. In addition, it is possible to form the reflecting surface 63 that is inconspicuous in appearance.

  Further, when the wavelength of light emitted from the light source 12 is an infrared wavelength outside the visible wavelength (for example, 800 nm or more), the material of the optical cover 60 is a visible light absorption type polycarbonate resin or acrylic resin that transmits only infrared light. You can do it. By forming the optical cover 60 with such a material, visible light components can be blocked by the optical cover 60 from unnecessary light entering from the outside of the optical cover 60. As described above, by forming the reflection surface 63 that reflects infrared light, the infrared light component of the unnecessary light can be blocked by the reflection surface 63. By blocking unnecessary light incident on the optical pointing device 1B, malfunction due to the unnecessary light can be prevented.

  Furthermore, when coloring the surface of the optical cover 60, which is the surface of the optical pointing device 1B, for example, only the wavelength band of a predetermined color such as green is provided on the upper surface of the optical cover 60 and the upper surface of the reflection surface 63, for example. May be coated with a material having a characteristic of reflecting other wavelengths and transmitting other wavelengths. By coating the upper surface of the optical cover 60 and the upper surface of the reflective surface 63 with a material having such characteristics, a desired color is applied to the surface of the optical pointing device 1B without impairing the optical properties of the optical pointing device 1B. Can be attached.

  The reflecting surface 65 reflects the reflected light L2 reflected from the imaging reflecting mirror 64 and reflected by the reflecting surface 63 toward the reflecting surface 63 again. The reflective surface 65 is located above the image sensor 13 and on the positive side of the Y axis from the image sensor 13, and is located on the back surface of the optical cover 60. The reflection surface 65 is formed by depositing a reflection film on the back surface of the optical cover 60. The reflective film forming the reflective surface 65 is preferably one that efficiently reflects light. The reflecting surface 65 is formed by evaporating a metal such as aluminum, nickel, gold, silver, or a dielectric dichroic film.

  A light shielding cover 50 is disposed above the LGA 40 with reference to the side surface and the upper surface of the sealing resin 44 of the LGA 40. The light shielding cover 50 has no aperture 21 as compared with the light shielding cover 20, and is provided with a light shielding cover hole 51 as a diaphragm opening for reflecting the reflected light L <b> 2 on the reflecting surface 63 to reach the image sensor 13. Passes through the sealing resin 44 from the light shielding cover hole 51 or the light source 12 provided to reach the detection area 61a of the optical cover 60 without shielding the irradiation light L1 in a necessary range, and directly enters the imaging element 13. The light shielding cover first projection 50e serving as a first light shielding wall for cutting incident stray light, the light shielding cover skirt portion 52 serving as a second light shielding wall, and the like have the same effects as the light shielding cover 20 of the optical pointing device 1A. A structure is provided.

  Since the optical pointing device 1B is assembled by the same alignment method as that of the optical pointing device 1A, description thereof is omitted.

  The optical pointing device 1B according to the present embodiment includes a light source 12 that irradiates light to a subject 2, an optical cover 60 that serves as a light guide plate type optical member that reflects and guides reflected light from the subject 2, and an optical cover. The imaging device 13 that receives light guided by the cover 60 and the light shielding cover 50 that cuts unnecessary irradiation light and stray light due to external light are provided. The optical cover 60 includes a contact surface 61 that contacts the subject 2, an imaging reflecting mirror 64 that serves as an imaging reflecting portion that guides the guided light to the imaging device 13, and the direction of reflected light from the subject 2. And a bending element 62 as an optical path changing means for converting the light and guiding it to the imaging reflecting mirror 64 are integrally formed. Therefore, by adopting such an optical cover 60, the length of the optical cover 60 in the vertical direction can be made smaller than the optical path length even if the optical path length of the optical system is increased and aberrations are suppressed. And miniaturization can be achieved. Further, by integrally forming the contact surface 61, the bending element 62, and the imaging reflecting mirror 64, it is possible to reduce the number of components and the number of assembly steps. In addition, by forming a mold for forming the optical cover 60 with high accuracy, the bending element inclined surface 62a and the imaging reflecting mirror 64 can be manufactured with high accuracy, and the contact surface 61, the bending element 62, and the image forming mirror 64 can be manufactured. The positional relationship of the reflecting mirror 64 can also be arranged with mold accuracy. Therefore, the manufacturing cost of the optical pointing device 1B can be reduced, and the optical pointing device 1B with high detection accuracy of the subject 2 can be realized.

  As described above, the optical pointing device 1B according to the present embodiment is guided by the light source 12 that irradiates light to the subject 2, the optical cover 60 that guides the reflected light from the subject 2, and the optical cover 60. An image sensor 13 that receives the reflected light, and a light shielding cover 50 that shields the image sensor 13 from stray light that is light other than the reflected light from the subject 2.

  In the present embodiment, the optical cover 60 is integrally formed with a contact surface 61 with which the subject 2 contacts and an imaging reflecting mirror 64 as an imaging element that guides the guided light to the imaging element 13. Has been. For this reason, since the imaging mirror 64 and the optical cover 60 are not separate from each other, the optical axis of the imaging reflector 64 is adjusted so that the light guided through the optical cover 60 is guided to the image sensor 13. The work of arranging can be omitted. As a result, it is possible to improve the assemblability and to achieve high accuracy and low cost.

  Here, in the present embodiment, the light source 12 and the image sensor 13 are disposed on the side opposite to the contact surface 61 of the optical cover 60. As a result, it is necessary to shield between the light source 12 and the image sensor 13. Further, it is necessary to shield light incident on the image sensor 13 from the outside.

  Therefore, in the present embodiment, the light shielding cover 50 includes the light shielding cover first protrusion 50e that shields incident light from the light source 12 to the image sensor 13 among stray light, and the image sensor 13 from the outside of the optical cover 60 among stray light. A light-shielding cover skirt portion 52 that shields incident light on is formed. For this reason, stray light that is light other than the reflected light from the subject 2 can be shielded from the imaging element 13 by the light shielding cover first protrusion 50e and the light shielding cover skirt portion 52. In addition, since the light shielding cover 50 is formed with a light shielding cover hole 51 that acts as a diaphragm for the light from the imaging reflecting mirror 64 to the image sensor 13, the light guided by the optical cover 60 is imaged. The light can be guided to the image sensor 13 via the reflecting mirror 64 and received.

  Therefore, it is possible to provide an optical pointing device 1 </ b> B with excellent light-shielding performance while improving accuracy and cost by improving assembly.

[Embodiment 3]
The following will describe another embodiment of the present invention with reference to FIG. The configurations other than those described in the present embodiment are the same as those in the first embodiment and the second embodiment. For convenience of explanation, members having the same functions as those shown in the drawings of Embodiment 1 and Embodiment 2 are given the same reference numerals, and explanation thereof is omitted.

  In this embodiment, an electronic device on which the optical pointing devices 1A and 1B described in Embodiments 1 and 2 are mounted will be described with reference to FIGS. 10 (a), 10 (b), and 10 (c). FIGS. 10A, 10B, and 10C are views showing the appearance of a mobile phone 70 as an electronic device equipped with any one of the optical pointing devices 1A and 1B. FIG. FIG. 10B is a rear view of the mobile phone 70, and FIG. 10C is a side view of the mobile phone 70. 10 (a), (b), and (c) show an example in which the mobile phone 70 is used as the electronic device, the present invention is not limited to this. The electronic device may be, for example, a PC (particularly a mobile PC), a PDA (Personal Digital Assistant: personal digital assistant), a game machine, a remote controller such as a television, or the like.

  As shown in FIGS. 10A, 10 </ b> B, and 10 </ b> C, the mobile phone 70 includes a monitor-side casing 71 and an operation-side casing 72. The monitor-side casing 71 includes a monitor section 75 and a speaker section 76, and the operation-side casing 72 includes a microphone section 73, a numeric keypad 74, and, for example, the optical pointing device 1A. The optical pointing device 1A mounted on the mobile phone 70 is not necessarily limited to this, and the optical pointing device 1B is also applicable.

  In this embodiment, the optical pointing devices 1A and 1B are arranged on the upper part of the numeric keypad 74 as shown in FIG. 10A, but the arrangement method and the direction of the optical pointing devices 1A and 1B are as follows. Is not limited to this.

  The speaker unit 76 outputs audio information to the outside, and the microphone unit 73 inputs audio information to the mobile phone 70. The monitor unit 75 outputs video information. In this embodiment, the monitor unit 75 displays input information from the optical pointing devices 1A and 1B.

  Note that, as shown in FIGS. 10A, 10B, and 10C, the cellular phone 70 according to the present embodiment includes an upper casing (monitor casing 71) and a lower casing (operation casing 72). ) Is connected via a hinge as an example. Since the folding type is the mainstream of the cellular phone 70, the folding type cellular phone is given as an example in the present embodiment. It is not limited to a folding type.

  As described above, it is possible to provide the mobile phone 70 including the optical pointing devices 1A and 1B having excellent light shielding performance while improving the assemblability to achieve high accuracy and low cost.

  The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and can be obtained by appropriately combining technical means disclosed in different embodiments. Embodiments are also included in the technical scope of the present invention.

  The present invention can be used for an input device such as a PC or a mobile phone, and can be suitably used particularly for a portable device that is required to be small and thin.

1A, 1B Optical pointing device 2 Subject 10 LGA
11 Substrate 12 Light source 13 Image sensor 14 Sealing resin 15 Second illumination lens 20 Light shielding cover 20e Light shielding cover first protrusion (first light shielding wall)
21 Aperture (aperture opening)
22 Shading cover skirt (second shading wall)
30 Optical cover 31 Contact surface 31a Detection area 32 First illumination lens 33 Imaging lens 34 Flange 40 LGA (package)
50 light shielding cover 50e light shielding cover first protrusion (first light shielding wall)
51 Shading cover hole (aperture opening)
52 Shading cover skirt (second shading wall)
60 Optical cover 61 Contact surface 61a Detection area 62 Bending element 62a Bending element inclined surface 63 Reflecting surface 64 Imaging reflector (imaging element)
65 Reflective surface 70 Mobile phone (electronic equipment)
71 Monitor-side casing 72 Operation-side casing 75 Monitor section 76 Speaker section L1 Irradiation light L2 Reflected light

Claims (3)

A light source that illuminates the subject,
An optical cover for guiding the reflected light from the subject inside;
An image sensor for receiving light guided by the optical cover;
An optical pointing device comprising a light shielding cover that shields stray light that is light other than reflected light from the subject with respect to the imaging element,
The optical cover is integrally formed with a contact surface that contacts the subject and an imaging element that guides the guided light to the imaging element,
The light source and the image sensor are disposed on the side opposite to the contact surface of the optical cover,
In the shading cover,
A diaphragm aperture that acts as a diaphragm for light from the imaging element to the imaging element;
A first light-shielding wall that shields incident light from the light source to the image sensor out of the stray light;
A second light shielding wall that shields incident light from the outside of the optical cover to the image sensor out of the stray light is formed ;
A package in which the light source and the image sensor are mounted on a substrate and sealed with a sealing resin is provided,
An optical pointing device, wherein a second illumination lens for guiding light from the light source to a subject is formed integrally with the sealing resin of the package . The optical cover includes
An imaging lens that is an imaging element that guides reflected light from the object to be guided to the imaging element;
The optical pointing device according to claim 1, wherein a first illumination lens that guides light from the light source to a subject is integrally formed. An electronic apparatus comprising the optical pointing device according to claim 1 .