USRE42794E1 - Information-inputting device inputting contact point of object on recording surfaces as information - Google Patents
Information-inputting device inputting contact point of object on recording surfaces as information Download PDFInfo
- Publication number
- USRE42794E1 USRE42794E1 US12/788,822 US78882210A USRE42794E US RE42794 E1 USRE42794 E1 US RE42794E1 US 78882210 A US78882210 A US 78882210A US RE42794 E USRE42794 E US RE42794E
- Authority
- US
- United States
- Prior art keywords
- writing implement
- writing
- plane
- area
- image
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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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
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
- G06F3/0421—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by interrupting or reflecting a light beam, e.g. optical touch-screen
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/10—Image acquisition
Abstract
Description
θ=arc tan(h/f) EQ1
β1=α−θ EQ2
A value of the angle β1 for the
x=L*tanβ2/(tanβ1+tanβ2) EQ3
y=x*tanβ1 EQ4
Assuming the
h=h0−h1
It should be noted that the distances “h0” and “h1” can be obtained from the number of pixels counted from the
L1=√(x2+y2)
L2=√((Xmax−x)2+y2)
Similarly, the distances L1 and L2 for the contact point D are obtained. Subsequently, at a step S604, the sum of the distances L1 and L2 is calculated for each of the contact points A and D. In the sixth embodiment, since the sum for the contact point A is greater than that for the contact point D, the image-
λ1=d1*tanθ EQ5
λ2=d2*tanθ EQ6
It is obvious from the above equations EQ5 and EQ6 that distance ranges λ1 and λ2 of a subject photographed by pixels E and F (pixels where the points E and D are located), which are adjacent to each other on the surface of the CMOS image sensor, vary depending on the distances d1 and d2 from the wide-angle lens. The pixels E and F photograph the subject located at the distance d1 from the point G in the range λ1. On the other hand, the pixels E and F photograph the subject located at the distance d2 from the point G in the range λ2. This indicates that accuracies in reading coordinates of the writing position are the same in a case of writing information from the point A to the point B and in a case of writing information from the point C to the point D.
x_dot=x/(an interval of recording coordinates in the x-axis direction) EQ7
y_dot=y/(an interval of recording coordinates in the Y-axis direction) EQ8
Subsequently, by setting the top left corner of a page of written data as the origin of the page, an origin of an “n”
x_dot_page=x_org(n)+x_dot EQ9
y_dot_page=y_org(n)+y_dot EQ10
The writing
x_dot=864×(x215)×(¼) EQ11
y_dot=1140×(y290)×(¼) EQ12
The equations EQ11 and EQ12 are derived from the following facts. The numbers of pixels in the width and the length of a page of written data are respectively 864 pixels and 1140 pixels. The width and the length of the page are respectively 215 millimeters and 290 millimeters. In addition, the width and the length of one of the writing blocks corresponding to the recording area are ¼ of the width and the length of the page respectively.
x_dot_page=x_org+x_dot EQ13
y_dot_page=y_org+y_dot EQ14
For example, if data is written at coordinates (100, 200) in the displaying
k1=√(x2+y2) EQ15
k2=√((215−x)2+y2) EQ16
Subsequently, values of lengths L1 and L2 can be obtained from the following equations.
L1=k1*sinθ EQ17
L2=k2*sinθ EQ18
The coordinates (x, y) of the point T obtained from the equations EQ1 through EQ4 are expressed in millimeters so that the lengths L1 and L2 obtained from the equations EQ17 and EQ18 are expressed also in millimeters. Thus, a unit of the lengths L1 and L2 should be converted from a millimeter to an inch by use of a fact that one-millimeter is equal to about 0.03937 inch. Subsequently, a resolution Rdiv_L of reading coordinates by the
Rdiv_L=1/(L1×0.03937) EQ19
Rdiv_R=1/(L2×0.03937) EQ20
Since the point T is provided in the recording area so that the value of k1 is greater than the value of k2 as shown in
Rdiv_R>Rdiv_L EQ21
As seen in the equation EQ21, the resolution of reading coordinates by the
Claims (30)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/788,822 USRE42794E1 (en) | 1999-12-27 | 2010-05-27 | Information-inputting device inputting contact point of object on recording surfaces as information |
US13/251,984 US8358872B2 (en) | 1999-12-27 | 2011-10-03 | Information-inputting device inputting contact point of object on recording surface as information |
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP36969999A JP2001184161A (en) | 1999-12-27 | 1999-12-27 | Method and device for inputting information, writing input device, method for managing written data, method for controlling display, portable electronic writing device, and recording medium |
JP11-369699 | 1999-12-27 | ||
US09/742,063 US6829372B2 (en) | 1999-12-27 | 2000-12-22 | Information-inputting device inputting contact point of object on recording surface as information |
US10/976,990 US7379622B2 (en) | 1999-12-27 | 2004-11-01 | Information-inputting device inputting contact point of object on recording surfaces as information |
US12/788,822 USRE42794E1 (en) | 1999-12-27 | 2010-05-27 | Information-inputting device inputting contact point of object on recording surfaces as information |
Related Parent Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/742,063 Division US6829372B2 (en) | 1999-12-27 | 2000-12-22 | Information-inputting device inputting contact point of object on recording surface as information |
US10/976,990 Continuation US7379622B2 (en) | 1999-12-27 | 2004-11-01 | Information-inputting device inputting contact point of object on recording surfaces as information |
US10/976,990 Reissue US7379622B2 (en) | 1999-12-27 | 2004-11-01 | Information-inputting device inputting contact point of object on recording surfaces as information |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/251,984 Continuation US8358872B2 (en) | 1999-12-27 | 2011-10-03 | Information-inputting device inputting contact point of object on recording surface as information |
Publications (1)
Publication Number | Publication Date |
---|---|
USRE42794E1 true USRE42794E1 (en) | 2011-10-04 |
Family
ID=18495103
Family Applications (4)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/742,063 Expired - Lifetime US6829372B2 (en) | 1999-12-27 | 2000-12-22 | Information-inputting device inputting contact point of object on recording surface as information |
US10/976,990 Expired - Lifetime US7379622B2 (en) | 1999-12-27 | 2004-11-01 | Information-inputting device inputting contact point of object on recording surfaces as information |
US12/788,822 Expired - Lifetime USRE42794E1 (en) | 1999-12-27 | 2010-05-27 | Information-inputting device inputting contact point of object on recording surfaces as information |
US13/251,984 Expired - Lifetime US8358872B2 (en) | 1999-12-27 | 2011-10-03 | Information-inputting device inputting contact point of object on recording surface as information |
Family Applications Before (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/742,063 Expired - Lifetime US6829372B2 (en) | 1999-12-27 | 2000-12-22 | Information-inputting device inputting contact point of object on recording surface as information |
US10/976,990 Expired - Lifetime US7379622B2 (en) | 1999-12-27 | 2004-11-01 | Information-inputting device inputting contact point of object on recording surfaces as information |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/251,984 Expired - Lifetime US8358872B2 (en) | 1999-12-27 | 2011-10-03 | Information-inputting device inputting contact point of object on recording surface as information |
Country Status (2)
Country | Link |
---|---|
US (4) | US6829372B2 (en) |
JP (1) | JP2001184161A (en) |
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US7274356B2 (en) | 2003-10-09 | 2007-09-25 | Smart Technologies Inc. | Apparatus for determining the location of a pointer within a region of interest |
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Also Published As
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US20010014165A1 (en) | 2001-08-16 |
US7379622B2 (en) | 2008-05-27 |
US8358872B2 (en) | 2013-01-22 |
US20050084177A1 (en) | 2005-04-21 |
US20120039509A1 (en) | 2012-02-16 |
US6829372B2 (en) | 2004-12-07 |
JP2001184161A (en) | 2001-07-06 |
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