WO1998044316B1 - Adjustable area coordinate position data-capture system - Google Patents
Adjustable area coordinate position data-capture systemInfo
- Publication number
- WO1998044316B1 WO1998044316B1 PCT/US1998/006487 US9806487W WO9844316B1 WO 1998044316 B1 WO1998044316 B1 WO 1998044316B1 US 9806487 W US9806487 W US 9806487W WO 9844316 B1 WO9844316 B1 WO 9844316B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- stylus
- light
- divergent
- angle
- determining
- Prior art date
Links
- 241001422033 Thestylus Species 0.000 claims abstract 22
- 239000007787 solid Substances 0.000 claims abstract 6
- 238000001514 detection method Methods 0.000 claims 2
- 230000003213 activating Effects 0.000 claims 1
- 230000000051 modifying Effects 0.000 claims 1
- 230000003760 hair shine Effects 0.000 abstract 1
Abstract
Capturing coordinate path data from a stylus (130, 930) moving across a surface of arbitrary size and shape. A first receiver (110, 809) is mountable to the surface, and is for receiving a first light beam (104) from the stylus. A second receiver (120, 839) is also mountable to the surface, and is for receiving a second light beam (934) from the stylus. The stylus (130, 930) either emits a plurality of divergent cone of light comprising the light beams by reflection from at least one divergent light source that shines at least one divergent cone of light over the surface. The surface light beam has a first angle with respect to a two-dimension coordinate system defined within surface, and the second light beam has a second angle with respect to the two-dimensional coordinate system. The first receiver determines the first angle, and second receiver determines the second angle. A processor determines the position of stylus given the first and second angles and the locations of first and second receiver means in the two-dimensional coordinate system. The receivers are preferably solid state receiving sensors employing solid state incident angle detectors (IADs), mounted in a common housing and separated known, fixed distance. Each IAD consists of two adjacent photodiode elements (821, 822) that provide continuous angle data based upon the ratio of light falling on the two elements' photosensitive surfaces.
Claims
AMENDED CLAIMS
[received by the International Bureau on 16 October 1998 (16.10.98); original claims 1-16 replaced by amended claims 1-21 (4 pages)]
A system (100) for capturing coordinate path data from a stylus (130) moving across a surface of arbitrary size and shape, characterized by:
(a) first receiver means (110) mountable to the surface for receiving a first light beam from the stylus (130), the first light beam having a first angle with respect to a two-dimensional coordinate system defined within the surface, the first receiver means (110) having means for determining the first angle;
(b) second receiver means (120) mountable to the surface for receiving a second light beam from the stylus, the second light beam having a second angle with respect to the two-dimensional coordinate system, the second receiver means (120) having means for determining the second angle; (c) means for determining the position of the stylus given the first and second angles and the locations of the first and second receiver means in the two-dimensional coordinate system; and
(d) means for determining a stylus characteristic.
2. The system of claim 1, wherein the first and second receiver means respectively include first and second rotating scanning receivers mounted on two adjacent corners, respectively, of a rectangle within the coordinate system.
3. The system of claim 2, further including first and second divergent light sources incorporated respectively within the first and second receiver means, wherein the first and second divergent light sources are for shining first and second divergent cones of light, respectively, over the surface, wherein the stylus comprises means for reflecting the light from the divergent light sources as the first and second light beams.
4. The system of claim 1, wherein the first and second receiver means respectively include first and second solid state incident angle detectors (IADs) mounted closely together in a common housing on a single corner of a rectangle within the coordinate system.
5. The system of claim 4, further including a divergent light source incorporated within the common housing and for shining a divergent cone of light over the surface, wherein the stylus comprises means for reflecting the light from the divergent light source as the first and second light beams.
6. The system of claim 1, wherein means (c) is a processor capable of performing triangulation to determine the position of the stylus.
7. The system of claim 1, wherein means (c) includes means for determining the path of the stylus given a real-time sequence of determined stylus positions.
8. The system of claim 1, wherein the stylus includes means for emitting a plurality of divergent cones of light comprising the first and second light beams.
9. The system of claim 8, wherein the stylus includes a pressure sensitive tip for activating or deactivating the first and second light beams in accordance with pressure applied to the stylus.
10. The system of claim 8, wherein the light beams are infrared (IR) radiation.
11. The system of claim 1, further comprising at least one divergent light source for shining at least one divergent cone of light over the surface, wherein the stylus includes means for reflecting the light from the divergent light source as the first and second light beams.
12. The system of claim 11, wherein the divergent light source includes one of light-emitting diodes and solid state laser diodes.
13. The system of claim 1, wherein the first and second receiver means each include: an internal reference light source for comparison with the respective first or second light beam to determine the respective first or second angle; a light detection amplifier having a gain; and an automatic gain control (AGC) sensor circuit for sensing the amplitude of the light detected by the respective receiver means, for adjusting the gain of the light detection amplifier in accordance with the amplitude sensed, and for adjusting the intensity of the internal reference light source inversely with the gain adjustment.
14. The system of claim 1 , wherein the means for determining a stylus characteristic includes a pulse code modulated (PCM) frequency generator in the stylus that generates a unique stylus characteristic code and a means for sensing and interpreting the code.
15. The system of claim 1 , wherein the means for determining a stylus characteristic includes means for determining the diameter of the stylus.
16. A system (100, 800) for capturing coordinate path data from a stylus (130, 930) moving across a surface of arbitrary size and shape, characterized by:
(a) a first solid state incident angle detector (IAD) (809) comprising two adjacent photodiode elements (821 , 822) and mounted in a common housing mountable at a corner of a rectangle within a two-dimensional coordinate system (950) defined within the surface, wherein the first IAD is for receiving a first light beam (904) from the stylus (130, 930), the first light beam having a first angle with respect to the two-dimensional coordinate system, the first IAD comprising means for determining the first angle based upon the ratio of light from the first light beam falling on the two adjacent photodiode elements of the first IAD;
(b) a second LAD (839) comprising two adjacent photodiode elements, wherein the second IAD is mounted in the common housing and separated from the first IAD by a known, fixed distance, wherein the second IAD is for receiving a second light beam (934) from the stylus (130, 930), the second light beam having a second angle with respect to the two-dimensional coordinate system, the second IAD comprising means for determining the second angle based upon the ratio of light from the second light beam falling on the two adjacent photodiode elements of the second IAD; and
(c) means for determining the position of the stylus given the first and second angles and the locations of the first and second receiver means in the two-dimensional coordinate system.
17. The system of claim 16, further including a divergent light source incorporated within the common housing and for shining a divergent cone of light over the surface, wherein the stylus comprises means for reflecting the light from the divergent light source as the first and second light beams.
18. The system of claim 17, wherein the divergent light source includes one of light-emitting diodes and solid state laser diodes.
19. The system of claim 16, wherein means (c) is a processor capable of performing triangulation to determine the position of the stylus.
20. The system of claim 16, wherein means (c) includes means for determining the path of the stylus given a real-time sequence of determined stylus positions.
21. The system of claim 16, further comprising:
(d) means for determining a stylus characteristic.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US4257897P | 1997-04-02 | 1997-04-02 | |
| US60/042,578 | 1997-04-02 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| WO1998044316A1 WO1998044316A1 (en) | 1998-10-08 |
| WO1998044316B1 true WO1998044316B1 (en) | 1998-12-10 |
| WO1998044316A9 WO1998044316A9 (en) | 1999-02-18 |
Family
ID=21922670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US1998/006487 WO1998044316A1 (en) | 1997-04-02 | 1998-04-02 | Adjustable area coordinate position data-capture system |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US6153836A (en) |
| WO (1) | WO1998044316A1 (en) |
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1998
- 1998-04-02 US US09/053,919 patent/US6153836A/en not_active Expired - Lifetime
- 1998-04-02 WO PCT/US1998/006487 patent/WO1998044316A1/en active Search and Examination
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