Methods and apparatus for transferring data from a display screen
First Claim
Patent Images
1. 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 having a duration unrelated to the data digit; and
sensing the modulated intensity level in the receiving device.
4 Assignments
0 Petitions
Accused Products
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.
71 Citations
12 Claims
-
1. 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 having a duration unrelated to the data digit; and
sensing the modulated intensity level in the receiving device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. 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 having a duration unrelated to the data digit; and
sensing the modulated color in the receiving device.
-
-
11. 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, 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, wherein said graphic pattern is maintained for a dwell having a duration unrelated to the data digit; and
sensing the ratio of white pixels to black pixels in the receiving device.
-
-
12. 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 having a duration unrelated to the data digit; and
sensing the modulated phase relationship in the receiving device.
-
Specification