US3671957A — Character generation display system

Claim 1

Independent Claim 325 words

Apparatus for providing an alpha-numeric display comprising a cathode ray tube including at least one electron beam adapted to scan the viewing surface of said cathode ray tube in successive horizontal traces to provide an alpha-numeric display frame, the individual alpha-numeric displays appearing in successive character slots of a text line including a plurality of horizontal traces; circuit means for providing a plurality of successively delayed pulses synchronized with tHe passage of said electron beam through each character slot; character designating means operative in synchronism with the movement of said electron beam to designate the character to be displayed in each character slot including; a series circulating memory for storing incoming coded character data for the entire alpha-numeric display frame at serial time positions according to the display position of the individual characters on said cathode ray tube, a temporary recirculating register operatively connected to receive series coded data groups for complete text lines from said circulating memory, and circuit means for controlling the transfer of coded data for a complete text line to said recirculating register just prior to formation of the text line on said cathode ray tube and for advancing the data in said recirculating register characterby-character in synchronism with the movement of said horizontal traces through successive character slots of each horizontal trace and through successive horizontal traces of a text line; logic circuit means coupled to said character designating means for designating for display selected horizontal increments of the horizontal trace passing through a character slot according to the character designation for the character slot, each horizontal increment corresponding in time to one of said delayed pulses; and gate circuit means coupled to said circuit means for providing delayed pulses and to said logic circuit means to pass delayed pulses corresponding in time those of said horizontal increments designated for display, said gate circuit means being connected to said cathode ray tube to control the intensity of said electron beam.

Claim 2

Dependent Claim 325 words

Apparatus for providing an alpha-numeric display comprising a cathode ray tube including at least one electron beam adapted to scan the viewing surface of said cathode ray tube in successive horizontal traces to provide an alpha-numeric display frame, the individual alpha-numeric displays appearing in successive character slots of a text line including a plurality of horizontal traces; circuit means for providing a plurality of successively delayed pulses synchronized with tHe passage of said electron beam through each character slot; character designating means operative in synchronism with the movement of said electron beam to designate the character to be displayed in each character slot including; a series circulating memory for storing incoming coded character data for the entire alpha-numeric display frame at serial time positions according to the display position of the individual characters on said cathode ray tube, a temporary recirculating register operatively connected to receive series coded data groups for complete text lines from said circulating memory, and circuit means for controlling the transfer of coded data for a complete text line to said recirculating register just prior to formation of the text line on said cathode ray tube and for advancing the data in said recirculating register characterby-character in synchronism with the movement of said horizontal traces through successive character slots of each horizontal trace and through successive horizontal traces of a text line; logic circuit means coupled to said character designating means for designating for display selected horizontal increments of the horizontal trace passing through a character slot according to the character designation for the character slot, each horizontal increment corresponding in time to one of said delayed pulses; and gate circuit means coupled to said circuit means for providing delayed pulses and to said logic circuit means to pass delayed pulses corresponding in time those of said horizontal increments designated for display, said gate circuit means being connected to said cathode ray tube to control the intensity of said electron beam.

Claim 3

Dependent Claim 18 words

Apparatus according to claim 1 wherein said circuit means for providing successively delayed pulses is a delay line.

Claim 4

Dependent Claim 43 words

Apparatus according to claim 2 further comprising a source of clock pulses coupled to said register and said delay line to advance said register and to trigger said delay line in synchronism with the passage of said electron beam through successive character slots.

Claim 5

Dependent Claim 309 words

Apparatus for providing an alpha-numeric display comprising a cathode ray tube including at least one electron beam adapted to scan the viewing surface of said cathode ray tube in successive horizontal traces to provide the alpha-numeric display, the alpha-numeric characters appearing in successive character slots of a text line; a delay line for providing a plurality of successively delayed pulses when triggered, said delayed pulses being synchronized with the passage of said electron beam through each character slot; a circulating register for storing coded data designating the characters to be displayed in the character slots of a text line, said register being advanced to designate a different character each time an advance pulse is applied thereto and to recirculate said data for use during successive horizontal traces of a text line; said circulating register including a number of parallel shift registers equal to the number of bits in said code for designating characters, each of said shift registers having a number of stages equal to the number of characters in a text line and being connected to recirculate data, and said shift registers being connected to shift data in synchronism; a clock pulse source coupled to said delay line to supply triggering pulses thereto, and coupled to said circulating register to supply advance pulses thereto; logic circuit means coupled to said circulating register for designating, for display, selected horizontal increments of the horizontal trace passing through a character slot according to the character designation for the character slot, each horizontal increment corresponding in time to one of said delayed pulses; and gate circuit means coupled to said delay line and to said logic circuit means to pass delayed pulses corresponding in time those of said horizontal increments designated for display, said gate circuit means being connected to said cathode ray tube to control the intensity of said electron beam.

Claim 6

Dependent Claim 309 words

Apparatus for providing an alpha-numeric display comprising a cathode ray tube including at least one electron beam adapted to scan the viewing surface of said cathode ray tube in successive horizontal traces to provide the alpha-numeric display, the alpha-numeric characters appearing in successive character slots of a text line; a delay line for providing a plurality of successively delayed pulses when triggered, said delayed pulses being synchronized with the passage of said electron beam through each character slot; a circulating register for storing coded data designating the characters to be displayed in the character slots of a text line, said register being advanced to designate a different character each time an advance pulse is applied thereto and to recirculate said data for use during successive horizontal traces of a text line; said circulating register including a number of parallel shift registers equal to the number of bits in said code for designating characters, each of said shift registers having a number of stages equal to the number of characters in a text line and being connected to recirculate data, and said shift registers being connected to shift data in synchronism; a clock pulse source coupled to said delay line to supply triggering pulses thereto, and coupled to said circulating register to supply advance pulses thereto; logic circuit means coupled to said circulating register for designating, for display, selected horizontal increments of the horizontal trace passing through a character slot according to the character designation for the character slot, each horizontal increment corresponding in time to one of said delayed pulses; and gate circuit means coupled to said delay line and to said logic circuit means to pass delayed pulses corresponding in time those of said horizontal increments designated for display, said gate circuit means being connected to said cathode ray tube to control the intensity of said electron beam.

Claim 7

Dependent Claim 47 words

Apparatus according to claim 4 further including means for individually designating the horizontal traces of a text line, said logic circuit means being connected to said last named means and operative to designate, for display, horizontal increments selected according to the designations of characters and horizontal traces.

Claim 8

Dependent Claim 46 words

Apparatus according to claim 4 further comprising counter means connected to said clock pulse source, said counter means being operatively connected to trigger a new horizontal trace of said electron beam each time a predetermined number of pulses have been received from said clock pulse source.

Claim 9

Dependent Claim 73 words

Apparatus according to claim 6 further comprising means for individually designating the horizontal traces of a text line, said last named means being so connected to said counter means that a different horizontal trace is designated each time said predetermined number of pulses is received, said logic circuit means being connected to said last named means and operative to designate, for display, horizontal increments selected according to designations of characters and horizontal traces.

Claim 10

Dependent Claim 49 words

Apparatus according to claim 6 further comprising second counter means coupled to said clock pulse source, said second counter means being operatively connected to trigger a new vertical deflection sweep of said electron beam each time a predetermined number of pulses have been received from said clock pulse source.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1975-06-20	1975-12-20	1976-06-20	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1979-06-20	1979-12-20	1980-06-20	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1983-06-20	1983-12-20	1984-06-20	$7700.00	Window Closed / Lapsed

Character generation display system

Abstract

Inventors

Bibliographic Details

Claims Analysis

References Cited (Backward Citations)

USPTO Annuity & Maintenance Windows

Assigned Categories & Tags

Assign Category Tag