Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1983-11-01
1986-05-27
Caldwell, Sr., John W.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
340712, 178 18, G09G 116
Patent
active
045918414
ABSTRACT:
A long range optical pointing apparatus (10) is disclosed which can locate a spot (24) on a video screen (16) from a position several feet away from the screen. An optical pointer unit (11) focuses a portion of the raster lines traced over the video screen during one frame onto a photodetector (28), and provides an output pulse when a raster line is focused upon and detected by the photodetector. The detected raster line pulses are provided to a processing unit (13) which also receives the vertical and horizontal deflection signals from the video terminal (15). The processing circuitry (13) averages the positions of the group of raster line portions detected by the optical pointer unit to provide an averaged vertical and horizontal position for the area of the screen at which the pointer (11) is directed. The vertical and horizontal information provided by the processing circuitry can be used by a computer (19) to provide a cursor at the spot (24) on the video screen (16) to inform the user of the position on the screen at which he is pointing. The optical pointer unit (11) can be worn on the head of a user seated before the video terminal (15) so that communication with the computer (19) through the video screen can be accomplished with head pointing movements.
REFERENCES:
patent: 3247391 (1966-04-01), Ogle
patent: 3497701 (1970-02-01), Dalton
patent: 3506875 (1970-04-01), Watanabe
patent: 3512037 (1970-07-01), Eckert
patent: 3586861 (1971-06-01), Wernikoff
patent: 3680078 (1972-07-01), Baskin
patent: 3825746 (1974-07-01), Kendler
patent: 3891890 (1975-06-01), Yasuda
patent: 3917955 (1975-11-01), Inulya
patent: 3997891 (1976-12-01), Iwamura
patent: 4093947 (1978-06-01), Habeger
patent: 4209255 (1980-06-01), Heynau
patent: 4263592 (1981-04-01), Takahashi
patent: 4275395 (1981-06-01), Dewey
patent: 4277783 (1981-07-01), Sampieri
patent: 4329684 (1982-05-01), Monteath
patent: 4340878 (1982-07-01), Spooner
patent: 4367465 (1983-01-01), Mati
patent: 4377810 (1983-03-01), Wolff
patent: 4395707 (1983-07-01), Satrapa
patent: 4454417 (1984-06-01), May
patent: 4472710 (1984-09-01), Suzuki
Direct Access Video Keyboard Control System (DAVK), NIHR Progress Reports, Bulletin of Prosthetics Research BPR 10-33 (vol. 17, No. 1), Spring 1980, pp. 124-125.
Gregg C. Vanderheiden, Hybrid Optical Head Pointing Technique, Fifth Annual Conference on Rehabilitation Engineering, Houston, Texas, 1982, p. 24.
LP-15 Precision Light Pen advertising sheet.
DT 170 advertising brochure by Design Technology.
DT 170M "Advanced Light Pen" product description by Design Technology (1983).
Gunderson Jon
Kelso David P.
Vanderheiden Gregg
Caldwell Sr. John W.
Heim Michael F.
Wisconsin Alumni Research Foundation
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