WO2006011711A1 - Optical pointing apparatus and personal portable device having the optical pointing apparatus - Google Patents
Optical pointing apparatus and personal portable device having the optical pointing apparatus Download PDFInfo
- Publication number
- WO2006011711A1 WO2006011711A1 PCT/KR2005/001747 KR2005001747W WO2006011711A1 WO 2006011711 A1 WO2006011711 A1 WO 2006011711A1 KR 2005001747 W KR2005001747 W KR 2005001747W WO 2006011711 A1 WO2006011711 A1 WO 2006011711A1
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- WIPO (PCT)
- Prior art keywords
- light
- optical
- reflecting mirror
- reflecting
- cover glass
- Prior art date
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Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/0304—Detection arrangements using opto-electronic means
- G06F3/0317—Detection arrangements using opto-electronic means in co-operation with a patterned surface, e.g. absolute position or relative movement detection for an optical mouse or pen positioned with respect to a coded surface
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
- G06F3/03547—Touch pads, in which fingers can move on a surface
Definitions
- the present invention relates to a user interface device, and more particularly, relates to an optical pointing device capable of being installed in a slim personal portable device such as a mobile phone and a personal portable device employing the optical pointing device.
- a personal portable device such as a mobile phone and personal digital assistants (PDA) employs a user interface using a keypad.
- a conventional personal portable device includes a keypad formed of a plurality of buttons for inputting numbers or letters such that a user pushes the button of the keypad in order to input telephone numbers or sentences.
- GUI graphical user interface
- OS operating system
- a personal portable device includes various additional services and the Windows operation system supporting the GUI is employed in order to conveniently use the various additional services
- a ball mouse an optical mouse, a laser mouse, a touch pad, and a tablet
- the pointing device is applied to a computer, and it is theoretically possible that the pointing device is employed as a pointing device of a personal portable device.
- the prime purpose of a personal portable device is portability, it is inconvenient and inconsistent with reality to carry an additional pointing device apart from the portable device.
- some pointing devices like trackball and joystick might be employed to the portable device, but the trackball and the joystick physically occupy a sizable space, so that they are rarely employed in a slim and small personal portable device.
- FIG. 1 is a cross-sectional view illustrating an optical system for explaining the theory of pointing of a general optical mouse.
- An optical system 100 of the optical mouse includes a light source 102, a light source guide 104, a cover glass 106, a condensing lens 108, a shading unit 110, and an optical image sensor 112.
- the light source 102 is a high brightness light-emitting diode (LED).
- LED light-emitting diode
- Light emitted from the light source 102 travels through the light source guide 104 and cover glass to be scanned on the ground G.
- the scanned light is reflected by the ground G to travel to to the condensing lens 108 via the cover glass 106 again.
- the condensing lens 108 condenses the light reflected by the ground G and focuses the light on the light image sensor 112.
- the shading unit 110 for removing noise light is formed between the optical image sensor 112 and the condensing lens 108.
- the optical image sensor 112 picks up an image corresponding to the light condensed via the condensing lens 108.
- the pick up information is provided to an image processing unit (not shown) in order to detect the movement of the ground that is an object.
- the optical system should secure a predetermined thickness enough to have an available focal depth. Namely, it is very restricted to make the optical system slim because of securing the focal depth.
- FIGS. 2 and 3 are schematic diagrams illustrating the relation between a focal length and a focal depth.
- FIG. 2 is a schematic diagram illustrating an optical system with a short focal length.
- a focus is formed on the surface of an optical image sensor 204.
- the focal length is short, since the angle of the light inputted to the surface of the optical image sensor 204 is very large, if the focal length is deviated a little, the focal spot of the light 200 becomes very large. If the size of the focal spot is larger than the pixel size of the optical image sensor 204, since an image is not normally processed, the optical system with the short focal length is difficult to arrange and an error rate becomes high.
- FIG. 3 illustrating an optical system with a long focal length, when light 300 is emitted to a condensing lens 302, a focus is formed on the surface of an optical image sensor 304.
- the size of the focal spot is not larger than the pixel of the image sensor 304, thereby easily arranging and reducing an error rate.
- a cover glass, a condensing lens, and an image sensor are vertically arranged in the direction of the optical axis, and the thickness of an optical system is restricted due to the limit of the depth of the focus of the optical system.
- the minimum thickness of the optical system of the optical mouse is about 4-5mm.
- the optical mouse cannot be employed to a personal portable device due to the limit of the thickness of the optical system.
- the present invention provides an optical pointing device and a personal portable device, the optical pointing device in which pointing using the movement of the finger is possible
- the present invention also provides an optical pointing device and a personal portable device which has a horizontal optical path, thereby minimizing the thickness of an optical system and providing a sufficient depth of a focus.
- the present invention also provides an optical pointing device and a personal portable device, which can minimize the loss of the light on an optical path.
- the present invention also provides an optical pointing device and a personal portable device, in which though a horizontal optical path is formed, an optical image sensor is stably installed on a horizontal PCB.
- an optical pointing device including a cover glass directly contacting an object, a light source unit emitting light to the cover glass, and a light receiving unit guiding the light reflected by the object on the cover glass in a predetermined direction, condensing the guided light, and picking up an image of the condensed light.
- the present invention provides an optical pointing device in which pointing is possible by using the surface of a finger, and more particularly, the thickness of an optical system is minimized to less than 2mm and a sufficient depth of a focus is provided, such as about 15-30mm.
- the present invention allows that a beautiful exterior of an ultra slim personal portable device is not damaged and convenient pointing is possible.
- FIG. 1 is a diagram illustrating an optical system of a general optical mouse
- FIGS. 2 and 3 are diagrams illustrating the depth of a focus of a condensing lens
- FIG. 4 is a cross-sectional view of an optical pointing device according to a first preferable embodiment of the present invention.
- FIG. 5 is a side perspective view of the optical pointing device according to the first preferable embodiment of the present invention.
- FIG. 6 is a diagram illustrating the optical path of the optical pointing device according to the first preferable embodiment of the present invention
- FIG. 7 is a cross-sectional view of an optical pointing device according to a second preferable embodiment of the present invention.
- FIG. 8 is a side perspective view of the optical pointing device according the second preferable embodiment of the present invention.
- FIG. 9 is a diagram illustrating the optical path of the optical pointing device according to the second preferable embodiment of the present invention.
- FIG. 10 is a cross-sectional view of the optical pointing device according to an embodiment similar to the second embodiment
- FIG. 11 is a cross-sectional view of an optical pointing device according to a third preferable embodiment of the present invention.
- FIG. 12 is a side perspective view of the optical pointing device according to the third preferable embodiment of the present invention
- FIG. 13 is a diagram illustrating the optical path of the optical pointing device according to the third preferable embodiment of the present invention.
- FIG. 14 is a cross-sectional view of an optical pointing device according to a fourth preferable embodiment of the present invention.
- FIG. 15 is a side perspective view of the optical pointing device according to the fourth preferable embodiment of the present invention.
- FIG. 16 is a diagram illustrating the optical path of the optical pointing device according to the fourth preferable embodiment of the present invention.
- FIG. 17 is a diagram illustrating the optical path of an optical pointing device according to an embodiment similar to the fourth embodiment
- FIG. 18 is a diagram illustrating an exterior view of a personal portable device employing the optical pointing device according to any one of the first through fourth preferable embodiments of the present invention.
- FIG. 19 is a block configuration diagram of the personal portable device of FIG. 18.
- FIG. 4 is a cross-sectional view of an optical pointing device according to a first preferable embodiment of the present invention
- FIG. 5 is a perspective view of the optical pointing device according to the first preferable embodiment of the present invention
- FIG. 6 is a diagram illustrating the optical path of the optical pointing device of FIG. 4.
- An optical pointing device 400 includes a light source unit 402, a cover glass 410, and a light- receiving unit 412.
- the light source unit 402 of the optical pointing device 400 includes a light source 404, a first guide mirror 406 and a second guide mirrors 408 guiding light emitted from the light source 404.
- the light source 404 is a surface mounted device (SMD) type light emitting diode (LED) or laser diode, which emits high bright light.
- SMD surface mounted device
- the first and second guide mirrors 406 and 408 reflect the light emitted from the light source 404 at a predetermined angle to guide to the cover glass 410.
- first and second guide mirrors 406 and 408 are installed in order to make the light meet the cover glass 410 with forming a small angle, such that the light emitted from the light source 404 enters on the rear surface of the cover glass 410 at a low incidence angle, thereby easily scanning the surface of a finger.
- the installation position, the number, or the angle of the guide mirrors may be variously modified in order to arrange the light source unit 402 conveniently.
- the reflecting surfaces of the first and second guide mirrors 406 and 408 are processed by polishing in order to improve the precision of the surface, thereby preventing the loss or diffused reflection of light in reflecting light.
- the cover glass 410 of the optical pointing device 400 is a transparent glass which receives light from the light source unit 402 by the rear surface and transmits the light to the top surface. Also, in case that the surface of the finger touches at the top surface of the cover glass 410, the light transmitted through the top surface of the cover glass 410 is reflected by the surface of the finger, the reflected light is received by the top surface and transmitted through the rear surface. The light transmitted through the rear surface is scanned to the light receiving unit 412 of the optical pointing device 400. Also, the top surface and the rear surface of the cover glass 410 is polished in order to improve the precision of the surface, thereby preventing the loss or diffused reflection of light in the incidence or the emission of the light.
- the light receiving unit of the optical pointing device 400 includes a first reflecting mirror 414, a condensing lens 416, and an optical image sensor 418.
- the first reflecting mirror 414 reflects the light reflected by the surface of the finger to guide it to the condensing lens 416.
- the light reflected by the first reflecting mirror 414 horizontally travels toward the condensing lens 416 to form a horizontal optical path.
- a waveguide Tl between the first reflecting mirror 414 and the optical image sensor 418 uses air as a medium, and the condensing lens 416 is inserted into the waveguide Tl.
- the condensing lens 416 is vertically inserted in order to orthogonally face the horizontal optical path, thereby providing convenience of assembling the light receiving unit 412.
- the condensing lens 416 condenses the light reflected by the first reflecting mirror 414 and transmits the refracted light to the optical image sensor 418.
- the reflecting surface of the first reflecting mirror 414 and the lens surface of the condensing lens 416 are polished to improve the precision of a surface, thereby preventing the loss and the diffused reflection of the light in the reflection, incidence, and emission of the light.
- the optical image sensor 418 is vertically installed to perpendicularly encounter with the light on the horizontal optical path and the condensed light is prejected on the optical image sensor 418.
- the optical image sensor 418 provides the pick up information to an image processing unit (not shown) for detecting the movement.
- the image processing unit detects the direction, speed, and distance of the movement of the surface of the finger via the pick up information and outputs as pointer information.
- an optical path of the light receiving unit 412 is horizontally formed, not only the thickness of the optical system may be minimized to 2mm but also an optical path with 15-30mm for a sufficient depth of a focus may be provided.
- the optical path of the optical pointing device 400 according to the first preferable embodiment of the present invention is described with reference to FIG. 6.
- Light is emitted from the light source 404 to the first guide mirror 406 (Al), and the first guide mirror 406 reflects the light on the second guide mirror 408 (A2).
- the light reflected by the second guide mirror 408 is heading straight for the cover glass 410 with a low angle of incidence (A3).
- the light guided to the cover glass 410 by being reflected by the second guide mirror 408 is transmitted through the cover glass 410 and scanned on the surface of a finger Hl.
- the light is irradiated to the first reflective mirror 414 (A4).
- the light irradiated to the first reflective mirror 414 is reflected again at a predetermined angle to change the path as horizontal.
- the horizontal light is irradiated to the condensing lens 416 (A5).
- the light guided to the condensing lens 416 is condensed and irradiated to the optical image sensor 418 (A6).
- the moving path of the light from the cover glass 410 is converted to be vertical (A5 and A6), thereby providing an optical path of 15-30mm for a sufficient depth of a focus and slimming the thickness of the light receiving unit 412 to be less than 2mm.
- the optical image sensor 418 is vertically installed to be orthogonal to the horizontal optical path, the optical image sensor 418 is difficult to be stably installed at a horizontal printed circuit board (PCB).
- PCB printed circuit board
- FIG. 7 is a cross-sectional view of an optical pointing device according to a second preferable embodiment of the present invention
- FIG. 8 is a side perspective view of the optical pointing device according the second preferable embodiment of the present invention
- FIG. 9 is a diagram illustrating the optical path of the optical pointing device according to the second preferable embodiment of the present invention.
- An optical pointing device 700 according to the second preferable embodiment of the present invention includes a light source unit 702, a cover glass 710, and a light receiving unit 712.
- the light source unit 702 of the optical pointing device 700 includes a light source 704 and first and second guide reflecting mirrors 706 and 708.
- the light source 704 is an SMD type LED or a laser diode, which emits high bright light.
- the first and second guide reflecting mirrors 706 and 708 reflect light emitted from the light source 704 at a predetermined angle to irradiate to the cover glass 710. Particularly, the reflection angle of the first and second guide reflecting mirrors 706 and 708 is determined such that the light is incident on the rear surface of the cover glass 710 at a small angle from the light source 704, thereby easily scanning the surface of a finger.
- the number or angle of first and second guide reflecting mirrors 706 and 708 are changed in order to change the installation position of the light source 704 or easily arrange the light source unit 702. Also, the reflecting surface of the first and second guide reflecting mirrors 706 and 708 is polished in order to improve the precision of the surface, thereby preventing the loss and the diffused reflection of light, which are possible to be generated in reflecting the light.
- the cover glass 710 of the optical pointing device 700 is a transparent glass that receives light from the light source unit 702 by the rear surface and transmits through the top surface.
- the surface of the finger is closely adhered to the top surface of the cover glass 710
- the reflected light is received by the top surface and transmitted through the rear surface.
- the light transmitted through the rear surface is provided to the light receiving unit 712 of the optical pointing device 700.
- the top and rear surfaces of the cover glass 710 are polished to improve the precision of the surface, thereby preventing the loss and the diffused reflection of light, which are possible to be generated in the incidence or refraction of the light.
- the light receiving unit 712 of the optical pointing device 700 includes a first reflecting mirror 714, a condensing lens 716, a second reflecting mirror 718, and an optical image sensor 720.
- the first reflecting mirror 714 reflects the light reflected by the surface of the finger and transmitted through the cover glass 710 at a predetermined angle and irradiates to the light receiving lens 716.
- the first reflecting mirror 714 has a reflection angle for forming a horizontal optical path.
- air is used as a medium between the first reflecting mirror 714 and the second reflecting mirror 718 and in a waveguide T2 between the second reflecting mirror 718 and the optical image sensor 720.
- the condensing lens 716 is interposed between the first reflecting mirror 714 and the second reflecting mirror 718 in the waveguide T2.
- the condensing lens 716 is vertically disposed in the horizontal optical path to provide convenience of arranging the light receiving unit 712.
- the condensing lens 716 condenses the light reflected at the first reflecting mirror 714 and provides to the second reflecting mirror 718.
- the second reflecting mirror 718 converts the horizontally traveling light into a vertical traveling light and provides to the optical image sensor 720. In this case, the second reflecting mirror 718 reflects the horizontal light at 90° to be vertically irradiated to the image optical image sensor 720 installed at the horizontal PCB.
- the reflecting surface of the first and second reflecting mirrors 714 and 718 and the surface of the condensing lens 716 are polished in order to improve the precision of the surface, thereby preventing the loss or diffused reflection of the light, capable of being generated in reflecting the light.
- the optical image sensor 720 is installed at the horizontal PCB, picks up an image of the light vertically reflected by the second reflecting mirror 718, and provides the pick up information to an image processing unit (not shown) for detecting movement.
- one condensing lens 716 is installed between the first and second reflecting mirrors 714 and 718, more than two condensing lenses may be installed.
- optical characteristics of the installed condensing lenses such as the focal length and the sort of lenses, may be identical or differently specified.
- the image processing unit detects the direction, speed, and distance of the movement of the surface of the finger via the pick up information and outputs as point information.
- the thickness of the optical system may not only be minimized but provide a sufficient depth of a focus.
- the horizontal light is converted into a vertical light and provided to the optical image sensor 720 installed at the horizontal PCB, thereby stably installing the optical image sensor 720.
- optical path of the optical pointing device 700 according to the second preferable embodiment is described with reference to FIG. 9.
- Light is emitted from the light source 704 to the first guide mirror 706 (Bl), and the first guide mirror 706 reflects the light on the second guide mirror 708 (B2).
- the light reflected by the second guide mirror 708 goes to the cover glass 710 and meets it forming a small angle(B3).
- the light guided to the cover glass 710 by being reflected by the second guide mirror 708 is transmitted through the cover glass 710 and scanned on the surface of a finger Hl.
- the light is irradiated to the first reflecting mirror 714 (B4).
- the light irradiated to the first reflecting mirror 714 is reflected again at a predetermined angle to change the path as horizontal.
- the horizontal light is irradiated to the condensing lens 716 (B 5).
- the light guided to the condensing lens 716 is condensed and irradiated to the second reflecting mirror (B 6).
- the path of the light irradiated to the second reflecting mirror 718 is changed to be vertical, and the vertical light is irradiated to the optical image sensor 720 (B7).
- the optical path for the sufficient depth of the focus is horizontally formed (B 5 and B 6), thereby minimizing the thickness of the optical system and providing a sufficient depth of a focus. Also, the horizontal light is converted into a vertical light (B7), thereby installing the optical image sensor 720 on a horizontal PCB.
- the condensing lens is possible to be formed as a convex lens having 10-90 ⁇ m curvature radius by using micro-electro-mechanical system (MEMS), micro injection molding, hot embossing, extra violet hardening molding methods, thereby forming the micro lens as an array structure to reduce the focal length.
- MEMS micro-electro-mechanical system
- the micro lens is arrayed identical with the number of pixels, thereby clearly picking up an image corresponding to each pixel.
- an optical waveguide may be employed to minimize the loss of light.
- a shading unit 717 may be installed between the condensing lens 716 and the second reflecting mirror 718.
- the shading unit 717 cuts off noise light except the light passing through the normal path, thereby assisting to form a clear image.
- a third preferable embodiment of the present invention employing the optical waveguide is described with reference to FIGS. 11 through 13.
- FIG. 11 is a cross-sectional view of an optical pointing device according to a third preferable embodiment of the present invention
- FIG. 12 is a side perspective view of the optical pointing device according to the third preferable embodiment of the present invention
- FIG. 13 is a diagram illustrating the optical path of the optical pointing device according to the third preferable embodiment of the present invention.
- An optical pointing device 1000 includes a light source unit 1002, a cover glass 1010, and a light receiving unit 1012.
- the light source unit 1002 of the optical pointing device 1000 includes a light source 1004 and first and second guide reflecting mirrors 1006 and 1008.
- the light source 1004 is an SMD type LED or a laser diode, which emits high bright light.
- the first and second guide reflecting mirrors reflect light emitted from the light source 1004 at a predetermined angle to irradiate to the cover glass 1010.
- the first and second guide mirrors 1006 and 1008 are installed such that the light emitted from the light source 1004 is incident upon the rear surface of the cover glass 1010 at a small angle.
- the number or the angle of the first and second guide mirrors 1006 and 1008 may be changed in order to change the installation position of the light source 1004 or easily arrange the light source unit.
- the reflecting surface of the first and second guide reflecting mirror 1006 and 1008 is polished in order to improve the precision of the surface, thereby preventing the loss and the diffused reflection of light, which are possible to be generated in reflecting the light.
- the cover glass 1010 of the optical pointing device 1000 is a transparent glass, which receives light from the light source unit 1002 by the rear surface and transmits to the top surface. Also, in case that the surface of the finger is closely adhered to the top surface of the cover glass 1010, if the light transmitted to the top surface of the cover glass 1010 is reflected by the surface of the finger, the reflected light is received by the top surface and transmitted to the rear surface. The light transmitted to the rear surface is irradiated to the light receiving unit 1012 of the optical pointing device 1000. Also, the top surface and the rear surface of the cover glass 1010 are polished to improve the precision of the surface, there by preventing the loss and diffused reflection of the light, which are possible to be generated in reflecting the light.
- the light receiving unit 1012 of the optical pointing device 1000 includes a first reflecting mirror 1014, a first waveguide, and a second waveguide 1018.
- the first reflecting mirror 1014 reflects light reflected by the surface of the finger and transmitted through the cover glass 1010 at a predetermined angle and provides to the first waveguide 1016.
- the first reflecting lens 1014 has a reflection angle for forming a horizontal optical path.
- the first waveguide 1016 is an optical waveguide composed of a transparent optical plastic or glass, which is horizontally installed on a horizontal optical path and the optical incident surface and the refraction surface are convexly formed, thereby guiding the incident light, firstly condensing, and refracting to the second waveguide 1018.
- the second waveguide 1018 is an optical waveguide composed of a transparent optical plastic or glass, which is horizontally installed on the horizontal optical path and the optical incident surface and the refraction surface are convexly formed, thereby guiding the incident light, secondly condensing, and refracting to an optical image sensor 1020.
- the reflecting surface of the first reflecting mirror 1014 and the incident surface and the refraction surface of the first and second waveguides 1016 and 1018 are polished to improve the precision of the surface, thereby preventing the loss and the diffused reflection of the light, which may be generated in reflecting the light.
- the optical image sensor 1020 is vertically installed on the horizontal optical path, which picks up an image of the light condensed by the first and second waveguides 1016 and 1018 and provides the pick up information to an image processing unit (not shown) for detecting the movement.
- the image processing unit detects the direction, speed, and distance of the movement of the surface of the finger via the pick up information and outputs as point information.
- the thickness of the optical system can be minimized to 2mm and allow to provide an optical path of 15 -30mm for a sufficient depth of a focus. Also, since a plurality of waveguides are installed for optical waveguide on the optical path of the light receiving unit 1012, the loss of the light on the optical path can be minimized.
- the optical path of the optical pointing device 1000 according to a third preferable embodiment of the present invention is described with reference to FIG. 13.
- Light is emitted from the light source 1004 to the first guide reflecting mirror 1006 (Cl), and the first guide reflecting mirror 1006 reflects the light to the second guide reflecting mirror 1008 (C2).
- the light emitted to the second guide reflecting mirror 1008 is reflected to be irradiated to the cover glass 1010 at a small angle (C3).
- the light reflected by the second guide reflecting mirror 1008 and irradiated to the cover glass 1010 is transmitted through the cover glass 1010 and irradiated to the surface of a finger H3.
- the light is reflected at the surface of the finger H3 and irradiated to the first reflecting mirror 1014 (C4).
- the light irradiated to the first reflecting mirror 1014 is reflected at a predetermined angle and the path is changed as horizontal.
- the horizontal light is irradiated to the first waveguide 1016 (C5).
- the light that passes through the first waveguide 1016 and is firstly condensed is irradiated to the second waveguide 1018 (C6).
- the light that passes through the second waveguide 1018 and is secondly condensed is irradiated to the optical image sensor (C7).
- the optical path is changed to be horizontal from the cover glass 1010, thereby providing the 15 -30mm optical path for a sufficient depth of a focus and reducing the thickness of the light receiving unit 412 to 2mm.
- the first and second waveguides 1016 and 1018 are provided on the optical path, thereby minimizing the loss of the light on the optical path.
- optical image sensor 1020 is difficult to be stably installed on the horizontal PCB because the optical image sensor 1020 is vertically installed on the horizontal optical path.
- a fourth preferable embodiment of the present invention for solving the problem is described in detail with reference to FIGS. 14 through 16.
- FIG. 14 is a cross-sectional view of an optical pointing device according to a fourth preferable embodiment of the present invention
- FIG. 15 is a side perspective view of the optical pointing device according to the fourth preferable embodiment of the present invention
- FIG. 16 is a diagram illustrating the optical path of the optical pointing device according to the fourth preferable embodiment of the present invention.
- An optical pointing device 1300 includes a light source unit 1302, a cover glass 1310, and a light receiving unit 1312.
- the light source unit 1302 of the optical pointing device 1300 includes a light source 1304 and first and second guide reflecting mirrors 1306 and 1308.
- the light source is an SMD type LED or a laser diode, which emits high bright light.
- the first and second guide reflecting mirrors 1306 and 1308 reflect light emitted from the light source 1304 at a predetermined angle and irradiate to the cover glass 1310.
- the reflection angle of the first and second guide reflecting mirrors 1306 and 1308 is determined such that the light emitted from the light source is incident to the rear surface of the cover glass 1310 at a small angle for easily scanning the surface of a finger.
- the number or the angle of the first and second guide reflecting mirrors 1306 and 1308 may be changed in order change the installation position or easily arrange the light source unit 1302.
- the reflecting surface of the first and second guide reflecting mirrors 1306 and 1308 is polished to improve the precision of the surface, thereby preventing the loss and the diffused reflection of the light, which may be generated in reflecting the light.
- the cover glass 1310 of the optical pointing device 1300 is a transparent glass receiving the light from the light source unit 1302 by the rear surface and transmitting to the top surface. Also, in case that the surface of a finger is closely adhered to the top surface of the cover glass 1310, if the light transmitted to the top surface of the cover glass 1310 is reflected by the surface of the finger, the reflected light is received by the top surface and transmitted through the rear surface. Also, the top surface and the rear surface of the cover glass 1310 are polished in order to improve the precision of the surface, thereby preventing the loss and the diffused reflection of the light, which may be generated in reflecting the light.
- the light receiving unit of the optical pointing device 1300 includes a first reflecting mirror 1314, first and second waveguides 1316 and 1318, a second reflecting mirror 1320, and an optical image sensor 1322.
- the first reflecting mirror 1314 reflects the light reflected by the surface of the finger and transmitted through the cover glass 1310 at a predetermined angle and irradiates to the first waveguide 1316.
- the first reflecting mirror 1314 has a reflection angle for forming a horizontal optical path.
- the first waveguide 1314 is an optical waveguide composed of a transparent optical plastic or glass, whose incident surface and the refraction surface are convexly formed, horizontally installed on a horizontal optical path.
- the first waveguide 1314 guides and firstly condenses the incident light to refract to the second waveguide 1318.
- the second waveguide 1318 is horizontally installed on the horizontal optical path, whose incident surface and the refraction surfaces are convexly formed.
- the second waveguide 1318 guides and secondly condenses the incident light to refract to the second reflecting mirror 1320.
- the second reflecting mirror 1320 converts the light refracted by the second reflecting mirror 1320 into a vertical light and irradiates to the optical image sensor 1322. In this case, the second reflecting mirror 1320 reflects the horizontal light at 90° such that the horizontal light can be vertically irradiated to the optical image sensor 1322 installed on the horizontal PCB.
- the reflecting surface of the first and second reflecting mirrors 1314 and 1320 and the incident surface and the refraction surface of the first and second waveguides 1316 and 1318 are polished to improve the precision of the surface, thereby preventing the loss and the diffused reflection of the light, which may be generated in reflecting the light.
- the optical image sensor 1322 is installed on the horizontal PCB, picks up an image of the light vertically reflected by the second reflecting mirror 1320, and provides pick up information to an image processing unit (not shown) for detecting the movement.
- the image processing unit detects the direction, speed, and distance of the movement of the surface of the finger via the pick up information and outputs as pointer information.
- the optical path for the depth of a focus of the light receiving unit 1312 is horizontally formed and a plurality of waveguides are installed, thereby minimizing the thickness of an optical system, providing a sufficient depth of a focus, and minimizing the loss of the light on the optical path.
- the horizontal light is converted into a vertical light and provided to the optical image sensor 1322 installed on the horizontal PCB, thereby stably installing the optical image sensor 1322.
- optical path of the optical pointing device 1300 according to the fourth preferable embodiment of the present invention is described with reference to FIG. 16.
- the first guide reflecting mirror 1306 reflects the light to the second guide reflecting mirror 1308 (D2).
- the light irradiated to the second guide reflecting mirror 1308 is reflected to be irradiated to the cover glass 1310 at a small angle (D3).
- the light reflected by the second guide reflecting mirror 1308 and irradiated to the cover glass 1310 is transmitted through the cover glass 1310 and irradiated to the surface of a finger H4.
- the light is reflected by the surface of the finger H4 and irradiated to the first reflecting mirror 1314 (D4).
- the light irradiated to the first reflecting mirror 1314 is reflected again at a predetermined angle such that the path is changed to be horizontal, and the horizontal light is irradiated to the first waveguide 1316 (D5).
- the light passing through the first waveguide 1316 and secondly condensed is irradiated to the second reflecting mirror 1320 (D7).
- the light secondly condensed and irradiated to the second reflecting mirror 1320 is reflected at a predetermined angle such that the path is changed to be vertical, and the vertical light is irradiated to the optical image sensor 1322 installed on the horizontal PCB (D8).
- a plurality of waveguides are horizontally installed on the path of the light from the cover glass 1310 (D5, D6, and D7), thereby providing a 15-30mm optical path for a sufficient depth of a focus, reducing the thickness of the light receiving unit 1312 to less than 2mm, and minimizing the loss of the light on the optical path.
- the horizontal light is converted into a vertical light (D8), thereby stably installing the optical image sensor 1322 on the horizontal PCB.
- a shading unit 1317 may be installed between the first waveguide 1316 and the second waveguide 1318.
- the shading unit cuts off noise light except the light passing through a normal path, thereby assisting to form a sharp image.
- the shading unit 1317 may be additionally installed between the second waveguide 1318 and the second reflecting mirror 1320.
- optical pointing device may be installed in a personal portable device.
- the optical pointing device according to any one of the first through fourth preferable embodiments of the present invention may be installed at a predetermined part of the mobile phone 1600, and a cover glass 1604 according to any one of the first through fourth embodiments may be installed at a predetermined part of a keypad 1602 of the mobile phone 1600, thereby a user may point by moving the surface of a finger as an object.
- the configuration of the mobile phone is described with reference to FIG. 19.
- a control unit 1700 of the mobile phone controls not only the overall mobile phone but also a display drive unit 1704 such that information on the speed, direction, and distance of the movement of the finger that is an object is received from an image processing unit 1712 and a pointer shown in a display 1706 is changed according to the information. Also, the control unit 1700 performs the operations according to operating click buttons included in the keypad 1708.
- the memory unit 1702 stores various pieces of information, including a processing program of the control unit 1700.
- the display drive unit 1704 displays a screen on the display 1706 according to the control of the control unit 1700 and changes the position of the pointer shown on the screen.
- the keypad 1708 includes a plurality of keys to provide a signal according to inputting the key to the control unit 1700 and further includes the click button used in pointing according to the present invention.
- An optical pointing device 1710 picks up an image of the finger that is the object and provides to the image processing unit 1712.
- the image processing unit 1712 generates pointer information on the speed, direction, and distance of the movement of the finger by using the pick up information and provides to the control unit 1700.
- the mobile phone performs pointing according to the speed, direction, and distance of the movement of the finger.
- pointing is possible by using the surface of a finger and a horizontal optical path is formed such that the thickness of an optical system is minimized, and a sufficient depth of a focus is provided, thereby keeping a beautiful exterior of an ultra slim personal portable device and performing convenient pointing.
- the loss of the light on the optical path can be minimized.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/579,702 US20070063130A1 (en) | 2004-07-29 | 2005-06-10 | Optical pointing apparatus and personal portable device having the optical pointing apparatus |
JP2007523463A JP2008507787A (en) | 2004-07-29 | 2005-06-10 | Optical pointing device and personal portable terminal |
EP05765030A EP1782173A1 (en) | 2004-07-29 | 2005-06-10 | Optical pointing apparatus and personal portable device having the optical pointing apparatus |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR20040059645 | 2004-07-29 | ||
KR10-2004-0059645 | 2004-07-29 | ||
KR20040089546 | 2004-11-05 | ||
KR10-2004-0089546 | 2004-11-05 | ||
KR1020050005935A KR100666196B1 (en) | 2004-07-29 | 2005-01-21 | Optical pointing apparatus and personal portable device having the optical pointing apparatus |
KR10-2005-0005935 | 2005-01-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006011711A1 true WO2006011711A1 (en) | 2006-02-02 |
Family
ID=35786428
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/KR2005/001747 WO2006011711A1 (en) | 2004-07-29 | 2005-06-10 | Optical pointing apparatus and personal portable device having the optical pointing apparatus |
Country Status (4)
Country | Link |
---|---|
US (1) | US20070063130A1 (en) |
EP (1) | EP1782173A1 (en) |
JP (1) | JP2008507787A (en) |
WO (1) | WO2006011711A1 (en) |
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EP1967943A2 (en) * | 2007-03-08 | 2008-09-10 | Crucialtec Co., Ltd. | Optical pointing device for mobile terminals |
JP2008242996A (en) * | 2007-03-28 | 2008-10-09 | Denso Corp | Information apparatus operation device and onboard electronic equipment |
WO2009119979A2 (en) | 2008-03-26 | 2009-10-01 | 크루셜텍(주) | Optical pointing apparatus and portable electronic apparatus with the same |
EP2214081A1 (en) * | 2009-01-30 | 2010-08-04 | Crucialtec Co., Ltd. | Optical pointing device and portable electronic device having the same |
US8599170B2 (en) | 2009-09-25 | 2013-12-03 | Sharp Kabushiki Kaisha | Optical pointing device and electronic equipments |
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WO2006019218A1 (en) * | 2004-08-20 | 2006-02-23 | Crucialtec Co., Ltd. | Ultra thin optical joystick and personal portable device having ultra thin optical joystick |
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KR20090105154A (en) * | 2008-04-01 | 2009-10-07 | 크루셜텍 (주) | Optical pointing device and method of detecting click event in optical pointing device |
JP4902714B2 (en) * | 2009-09-30 | 2012-03-21 | シャープ株式会社 | Optical pointing device, electronic apparatus including the same, light guide, and light guide method. |
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WO2011052788A1 (en) * | 2009-11-02 | 2011-05-05 | シャープ株式会社 | Light-pointing device and electronic apparatus provided with same |
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US20130027351A1 (en) * | 2011-07-26 | 2013-01-31 | Research In Motion Limited | Optical navigation modules for mobile communication devices |
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US10192856B2 (en) * | 2014-12-30 | 2019-01-29 | Pixart Imaging Inc. | Optical navigation module capable of performing lateral detection and adjusting tracking distance |
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JP2001067178A (en) * | 1999-08-30 | 2001-03-16 | Hiroshi Yoshida | Character information input based on handwriting operation |
EP1182606A2 (en) * | 2000-07-31 | 2002-02-27 | Agilent Technologies, Inc. (a Delaware corporation) | Four axis optical mouse |
US20040046741A1 (en) * | 2002-09-09 | 2004-03-11 | Apple Computer, Inc. | Mouse having an optically-based scrolling feature |
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Publication number | Priority date | Publication date | Assignee | Title |
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EP1967943A2 (en) * | 2007-03-08 | 2008-09-10 | Crucialtec Co., Ltd. | Optical pointing device for mobile terminals |
JP2008226224A (en) * | 2007-03-08 | 2008-09-25 | Crucialtec Co Ltd | Optical pointing device for mobile terminal device |
EP1967943A3 (en) * | 2007-03-08 | 2012-03-21 | Crucialtec Co., Ltd. | Optical pointing device for mobile terminals |
JP2008242996A (en) * | 2007-03-28 | 2008-10-09 | Denso Corp | Information apparatus operation device and onboard electronic equipment |
WO2009119979A2 (en) | 2008-03-26 | 2009-10-01 | 크루셜텍(주) | Optical pointing apparatus and portable electronic apparatus with the same |
EP2214081A1 (en) * | 2009-01-30 | 2010-08-04 | Crucialtec Co., Ltd. | Optical pointing device and portable electronic device having the same |
US8599170B2 (en) | 2009-09-25 | 2013-12-03 | Sharp Kabushiki Kaisha | Optical pointing device and electronic equipments |
Also Published As
Publication number | Publication date |
---|---|
JP2008507787A (en) | 2008-03-13 |
EP1782173A1 (en) | 2007-05-09 |
US20070063130A1 (en) | 2007-03-22 |
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