US6281820B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods and apparatus for transferring data from a display screen
Assignee: pointSet Corp
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Filing: 1999-07-12
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Granted: 2001-08-28
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Expires: 2019-07-12
Abstract
Abstract Luminance or color modulation of a display screen is used to transfer data to an external receiving device. At least a portion of the display screen is modulated, such as by intensity modulation, to represent a data digit. By using a plurality of intensity levels greater than 2, it is possible to represent data digits having a numerical base greater than 2. For example, providing modulation with ten different intensity levels allows each modulation “dwell” to represent a decimal digit. The modulation is sensed by a photodetector in the external receiving device and converted to the corresponding data digit.
Inventors
- 👤 Kyle Fields
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:50
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/12; H03M1/22; H03M1/32
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
78 words
A method of transferring data from a display screen to a receiving device comprising the steps of: modulating intensity of at least a portion of the display screen to represent a data digit having a numerical base greater than two with a corresponding one of a plurality of intensity levels greater than two, wherein said one intensity level is maintained for a dwell of at least 50 msec.; and sensing the modulated intensity level in the receiving device.
Claim 2
Independent Claim
78 words
A method of transferring data from a display screen to a receiving device comprising the steps of: modulating intensity of at least a portion of the display screen to represent a data digit having a numerical base greater than two with a corresponding one of a plurality of intensity levels greater than two, wherein said one intensity level is maintained for a dwell of at least 50 msec.; and sensing the modulated intensity level in the receiving device.
Claim 3
Dependent Claim
17 words
The method of claim 1 wherein the step of modulating intensity comprises displaying a shade of gray.
Claim 4
Dependent Claim
15 words
The method of claim 1 wherein the step of modulating intensity comprises displaying a color.
Claim 5
Dependent Claim
20 words
The method of claim 1 wherein the step of modulating intensity comprises displaying a pattern of black and white pixels.
Claim 6
Dependent Claim
14 words
The method of claim 4 wherein the pattern comprises a regular pattern of cells.
Claim 7
Dependent Claim
13 words
The method of claim 4 wherein the pattern comprises an irregular graphic pattern.
Claim 8
Dependent Claim
49 words
The method of claim 1 wherein the step of modulating intensity of at least a portion of the display screen comprises modulating the intensity of an array of locations and wherein the receiving device includes a plurality of intensity detectors in an array corresponding to the array of locations.
Claim 9
Dependent Claim
13 words
The method of claim 7 wherein the array of locations comprises four quadrants.
Claim 10
Dependent Claim
35 words
The method of claim 1 wherein the step of modulating comprises displaying a plurality of colors and wherein the receiving device includes a plurality of detectors sensitive to respective ones of the plurality of colors.
Claim 11
Independent Claim
75 words
A method of transferring data from a display screen to a receiving device comprising the steps of: modulating color of at least a portion of the display screen to represent a data digit having a numerical base greater than two with a corresponding one of a plurality of colors greater than two, wherein said one color is maintained for a dwell of at least 50 msec.; and sensing the modulated color in the receiving device.
Claim 12
Independent Claim
75 words
A method of transferring data from a display screen to a receiving device comprising the steps of: modulating color of at least a portion of the display screen to represent a data digit having a numerical base greater than two with a corresponding one of a plurality of colors greater than two, wherein said one color is maintained for a dwell of at least 50 msec.; and sensing the modulated color in the receiving device.
Claim 13
Independent Claim
112 words
A method of transferring data from a display screen to a receiving device comprising the steps of: displaying a graphic pattern on the display screen for a dwell of at least 50 msec., said graphic pattern comprising a first number of white pixels and a second number of black pixels, the first number of white pixels to the second number of black pixels being a predetermined ratio selected from a set of predetermined ratios, said set having more than two members so that the selected ratio represents a corresponding data digit having a numerical base greater than two; and sensing the ratio of white pixels to black pixels in the receiving device.
Claim 14
Independent Claim
112 words
A method of transferring data from a display screen to a receiving device comprising the steps of: displaying a graphic pattern on the display screen for a dwell of at least 50 msec., said graphic pattern comprising a first number of white pixels and a second number of black pixels, the first number of white pixels to the second number of black pixels being a predetermined ratio selected from a set of predetermined ratios, said set having more than two members so that the selected ratio represents a corresponding data digit having a numerical base greater than two; and sensing the ratio of white pixels to black pixels in the receiving device.
Claim 15
Independent Claim
86 words
A method of transferring data from a display screen to a receiving device comprising the steps of: modulating intensity of at least two colors on the display screen; modulating a phase relationship between the modulated colors to represent a data digit having a numerical base greater than two with a corresponding one of a plurality of phase relationships greater than two, wherein said one phase relationship is maintained for a dwell of at least 50 msec.; and sensing the modulated phase relationship in the receiving device.
Claim 16
Independent Claim
86 words
A method of transferring data from a display screen to a receiving device comprising the steps of: modulating intensity of at least two colors on the display screen; modulating a phase relationship between the modulated colors to represent a data digit having a numerical base greater than two with a corresponding one of a plurality of phase relationships greater than two, wherein said one phase relationship is maintained for a dwell of at least 50 msec.; and sensing the modulated phase relationship in the receiving device.
Claim 17
Independent Claim
90 words
A method of transferring data from a display screen to a receiving device comprising the steps of: sequentially changing at least one of intensity or color of at least a portion of the display screen; modulating a time interval between successive changes to represent a data digit having a numerical base greater than two with a corresponding one of a plurality of time intervals greater than two, wherein each of said plurality of time intervals is at least 50 msec.; and sensing the modulated time interval in the receiving device.
Claim 18
Independent Claim
90 words
A method of transferring data from a display screen to a receiving device comprising the steps of: sequentially changing at least one of intensity or color of at least a portion of the display screen; modulating a time interval between successive changes to represent a data digit having a numerical base greater than two with a corresponding one of a plurality of time intervals greater than two, wherein each of said plurality of time intervals is at least 50 msec.; and sensing the modulated time interval in the receiving device.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-08-27 | 2005-02-26 | 2005-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-08-27 | 2009-02-26 | 2009-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-08-27 | 2013-02-26 | 2013-08-28 | $7700.00 | Window Closed / Lapsed |