US3728575A - Digital vector generator which causes the electron beam to move in the largest possible increment by sensing if the line is divisible by 2{11 . - Google Patents
Digital vector generator which causes the electron beam to move in the largest possible increment by sensing if the line is divisible by 2{11 . Download PDFInfo
- Publication number
- US3728575A US3728575A US00871161A US3728575DA US3728575A US 3728575 A US3728575 A US 3728575A US 00871161 A US00871161 A US 00871161A US 3728575D A US3728575D A US 3728575DA US 3728575 A US3728575 A US 3728575A
- Authority
- US
- United States
- Prior art keywords
- bits
- move
- electron beam
- storage means
- causes
- 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
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G1/00—Control arrangements or circuits, of interest only in connection with cathode-ray tube indicators; General aspects or details, e.g. selection emphasis on particular characters, dashed line or dotted line generation; Preprocessing of data
- G09G1/06—Control arrangements or circuits, of interest only in connection with cathode-ray tube indicators; General aspects or details, e.g. selection emphasis on particular characters, dashed line or dotted line generation; Preprocessing of data using single beam tubes, e.g. three-dimensional or perspective representation, rotation or translation of display pattern, hidden lines, shadows
- G09G1/08—Control arrangements or circuits, of interest only in connection with cathode-ray tube indicators; General aspects or details, e.g. selection emphasis on particular characters, dashed line or dotted line generation; Preprocessing of data using single beam tubes, e.g. three-dimensional or perspective representation, rotation or translation of display pattern, hidden lines, shadows the beam directly tracing characters, the information to be displayed controlling the deflection and the intensity as a function of time in two spatial co-ordinates, e.g. according to a cartesian co-ordinate system
- G09G1/10—Control arrangements or circuits, of interest only in connection with cathode-ray tube indicators; General aspects or details, e.g. selection emphasis on particular characters, dashed line or dotted line generation; Preprocessing of data using single beam tubes, e.g. three-dimensional or perspective representation, rotation or translation of display pattern, hidden lines, shadows the beam directly tracing characters, the information to be displayed controlling the deflection and the intensity as a function of time in two spatial co-ordinates, e.g. according to a cartesian co-ordinate system the deflection signals being produced by essentially digital means, e.g. incrementally
Definitions
- ABSTRACT Rld..”l'tiDta' 1 e ate U S App on a A circuit for use in a cathode ray tube vector display Di ision of Ser. No. 569,48l, Aug. 1, 1966, Pat. No. device for controlling the speed at which the electron 3,510,634- 4 I beam is made to transverse the screen.
- the circuit senses whether the length of the line segment yet to be [52] US. Cl. ..3l5/l8, 340/324 A formed is evenly divisible by 2 4 2n and causes [51] Int.
- FIGS. u 8 l2 v 2 NOT COMPARE DRAW PRESET m I Q 10 FIGS. :0 a as I g o 3 m 3' I II) 0) V cm.
Abstract
A circuit for use in a cathode ray tube vector display device for controlling the speed at which the electron beam is made to transverse the screen. The circuit senses whether the length of the line segment yet to be formed is evenly divisible by 2,4,8. . . 2n and causes the electron beam to move in the largest possible increment.
Description
United States Patent 1191 Granberg et al. Apr. 17, 1973 DIGITAL VECTOR GENERATOR [56] References Cited WHICH CAUSES THE ELECTRON NI BEAM TO MOVE IN THE LARGEST U TED STATES PATENTS POSSIBLE INCREMENT BY SENSING 3,320,409 5/1967 Larrowe .235/151 IF THE LINE [5 DIVISIBLE BY 3,403,286 9/1968 Carlock et al. ..314/18 7 3,422,304 l/l969 Thorpe ..3l5/l8 1 lnvemorsl Mam"! cranbel'g, Mmneapolls; 3,459,926 8/1969 Heilweil et al.... ..340/324 1 x Hubert Mueller, Jr-. g. 3,509,542 4/1970 Ehrman ..340/324.1x both of Minn.
[73] Assignee: Sperry Rand Corporation, New Primary Emminer cafl Q f York Assistant 'ExaminerJ. M. Potenza Att0rneyThomas J. Nikolai, Charles A. Johnson and [22] Filed: July 17, 1969 John p Dority 211 Appl. No.5 871,161
1 [57] ABSTRACT Rld.."l'tiDta' 1 e ate U S App on a A circuit for use in a cathode ray tube vector display Di ision of Ser. No. 569,48l, Aug. 1, 1966, Pat. No. device for controlling the speed at which the electron 3,510,634- 4 I beam is made to transverse the screen. The circuit senses whether the length of the line segment yet to be [52] US. Cl. ..3l5/l8, 340/324 A formed is evenly divisible by 2 4 2n and causes [51] Int. Cl ;.H0l 29/70 the electron beam to move in the largest possible 58 Field 61 Search ..3l5/l8; 340/3241, crement 2 Claims, 40 Drawing Figures BUFFER (P96 s-ee 5-7a PATENTEDAPRIYIQB. 3.728575 SHEET 010F23 8 fh OCTAL [0| 7 x POSITION Y POSITION |||2--4I5 l4|l5 24 q oo \OQOQQQ v VECTOR WORD I'l l 'TANGENT OR COTANGENT I 'x OR Y FINAL II '2 3'4 4l 5 PATENfED R I 71m 'Lx men) [X STOP s x 5-60 5-22 gig-54s Lcommne l5) CONTROL POSITION WORD "i/ I r5'4o LINE 5'2 cone (546 OCTANT 15 5 28 5 38 s DECODER WORD VECTOR worm FLAG l 25 (FIG. 9)
I 544 S-ZMPUT BUFFER me. a)
DATA
PATENTEU 3.728.575
SHEET 0U, 0F 23 Q; 92 03 @4 TI T2 3 4 T5 T6 T7 T8 CLOCK GENERATOR (SET) TQ| (cLRfiE I FF (SET) T02 L PATENTEU 3.728.575
Y sum 08 0F 23 INTENSITY A LEvEL SELECT Jw w d m TO FIGS. 28.830 Wm N 9.1 m f E? E m 0 50 d t 3 u D: O P o 5 DRAW FLAG E To FIGS I0,l8 a 36 v u N no P P P m m ,GATE sue. m H
AND COUNTER T0 FIGS. u 8 l2 v 2 NOT COMPARE DRAW PRESET m I Q 10 FIGS. :0 a as I g o 3 m 3' I II) 0) V cm. COUNTER 2% m g To FIG l3 Fl m m m 10 o m ENABLE sua.
AND COUNTER q T0 FIGS. I3 820 T m 9 t8 8 I v 03 STOP r m m COMPAREO TO FIG. l8 5 A a a STARTO (O rv N a, U) I? N o o 4 m m 40 up I m 0 0 I o 0' (D qm P m N m POSITION @l AWORD LOADED A To FIGS 11 8 12 z POSITION WORD N'- on i (\1 5% I m a 0 m qa: .vEcToR 'm WDRD LOADED m VECTOR WOR% To FIGS. |4,|8 cc ODR PATENTED W I 71375 saw 08 0F 23 PATENTED APR 1 7 [973 SHEET 12 [1F 23 w wmok BIT 3 BIT 3 PATENTEDAPR 1 71975 SHEET 13 OF 23 ihzo m 95 omm w o mnE o m mu OTM m PAIENTED APR 1 71975 COMPARE VECTOR DRAW I/ O CYCLE CYCLE STOP CYCLE CYCLE SHEET m 0F 23 Q GATE TO Xu ,Y AND OCTANT REGISTERS.
Q GATE TO T AND F-REGS. AND TO D/A CONVERTER FROM X AND Y.
D SET DRAW PRESET FLIP-FLOP.
Q CLEAR C-REG.,GATE X ANDY TO D/A CONVERTER, SET INTENSITY FLIP-FLOP l IF DRAW FLAG FLIP-FLOP SET.
@ SET DRAW FLAG FLIP-FLOP, ENABLE SUBTRACTOR AND COUNTER.
OPERATION TIMING CHART BEAM BLANKING CONTROL PATENTEDAPR 1 71975 SHEET 1a or 23 VECTOR WORD LOADED INTENSITY LEVEL (FIG .9)
m m F m m
Claims (2)
1. An electron beam speed control circuit for a cathode ray tube having a deflection system for moving the beam and wherein the smallest step the beam can be moved is a unit increment, said circuit comprising: a. first storage means for storing m bits representing present beam position, b. second storage means for storing m bits representing final beam position, c. a comparator coupled to said first and second storage means for comparing n of said m bits of said present beam position with n corresponding bits of said final beam position and producing an output signal when said bits compare, and d. control means coupled to said comparator and the deflection system for moving said beam in 2n 1 unit increments, said control means causing said beam to move in 2n unit increments when said output signal is produced by said comparing means.
2. An electron beam speed control circuit for a cathode ray tube having a deflection system for moving the beam and wherein the smallest step the beam can be moved is a unit increment, said circuit comprising: a. first storage means for storing m bits representing present beam position, b. second storage means for storing m bits representing final beam position, c. a comparator coupled to both said storage means for comparing m- n bits of said present beam position with m- n corresponding bits of said final beam position and producing an output signal when said bits compare, and d. control means coupled to said comparator and the deflection system for causing said beam to move in 2n unit increments, said control means causing said beam to move in 2n 1 unit increments when said output signal is produced by said comparing means.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US56948166A | 1966-08-01 | 1966-08-01 | |
US87116169A | 1969-07-17 | 1969-07-17 | |
US87116069A | 1969-07-17 | 1969-07-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3728575A true US3728575A (en) | 1973-04-17 |
Family
ID=27416082
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US569481A Expired - Lifetime US3510634A (en) | 1966-08-01 | 1966-08-01 | Digital vector generator |
US00871161A Expired - Lifetime US3728575A (en) | 1966-08-01 | 1969-07-17 | Digital vector generator which causes the electron beam to move in the largest possible increment by sensing if the line is divisible by 2{11 . |
US00871160A Expired - Lifetime US3723802A (en) | 1966-08-01 | 1969-07-17 | Digital vector generator utilizing intensity control as a function of vector angle and velocity |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US569481A Expired - Lifetime US3510634A (en) | 1966-08-01 | 1966-08-01 | Digital vector generator |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00871160A Expired - Lifetime US3723802A (en) | 1966-08-01 | 1969-07-17 | Digital vector generator utilizing intensity control as a function of vector angle and velocity |
Country Status (4)
Country | Link |
---|---|
US (3) | US3510634A (en) |
DE (1) | DE1549874B2 (en) |
FR (1) | FR1551898A (en) |
GB (1) | GB1148849A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4027148A (en) * | 1975-09-10 | 1977-05-31 | Lawrence David Rosenthal | Vector generator |
US4365305A (en) * | 1981-01-05 | 1982-12-21 | Western Electric Company, Inc. | Vector generator for computer graphics |
US4500879A (en) * | 1982-01-06 | 1985-02-19 | Smith Engineering | Circuitry for controlling a CRT beam |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4115863A (en) * | 1976-12-07 | 1978-09-19 | Sperry Rand Corporation | Digital stroke display with vector, circle and character generation capability |
US4251816A (en) * | 1978-12-21 | 1981-02-17 | Ncr Corporation | Method and apparatus for plotting graphics |
US7072767B2 (en) * | 2003-04-01 | 2006-07-04 | Conocophillips Company | Simultaneous inversion for source wavelet and AVO parameters from prestack seismic data |
CN112783472B (en) * | 2019-11-05 | 2023-12-12 | 何群 | Multi-value logic wide-bit high-speed adder |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3320409A (en) * | 1963-01-30 | 1967-05-16 | Burroughs Corp | Electronic plotting device |
US3403286A (en) * | 1966-12-27 | 1968-09-24 | Ibm | Digital cathode ray tube deflection system |
US3422304A (en) * | 1967-09-15 | 1969-01-14 | Ibm | Logic controlled deflection system |
US3459926A (en) * | 1965-10-18 | 1969-08-05 | Ibm | Graphic vector generator |
US3509542A (en) * | 1967-08-15 | 1970-04-28 | Sperry Rand Corp | Digital vector generator |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3329948A (en) * | 1963-05-03 | 1967-07-04 | Burroughs Corp | Symbol generating apparatus |
US3333147A (en) * | 1963-07-31 | 1967-07-25 | Bunker Ramo | Line drawing system |
US3331069A (en) * | 1963-10-23 | 1967-07-11 | Kaiser Aerospace & Electronics | Contact analog |
US3325802A (en) * | 1964-09-04 | 1967-06-13 | Burroughs Corp | Complex pattern generation apparatus |
US3325803A (en) * | 1964-10-01 | 1967-06-13 | Ibm | Deflection control circuit |
US3337860A (en) * | 1964-12-31 | 1967-08-22 | Ibm | Display tracking system |
US3394367A (en) * | 1965-07-14 | 1968-07-23 | Bendix Corp | Symbol generator |
US3403288A (en) * | 1965-10-28 | 1968-09-24 | Ibm | Dynamic intensity corrections circuit |
-
1966
- 1966-08-01 US US569481A patent/US3510634A/en not_active Expired - Lifetime
-
1967
- 1967-07-14 GB GB32530/67A patent/GB1148849A/en not_active Expired
- 1967-07-31 DE DE19671549874 patent/DE1549874B2/en not_active Withdrawn
- 1967-08-01 FR FR1551898D patent/FR1551898A/fr not_active Expired
-
1969
- 1969-07-17 US US00871161A patent/US3728575A/en not_active Expired - Lifetime
- 1969-07-17 US US00871160A patent/US3723802A/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3320409A (en) * | 1963-01-30 | 1967-05-16 | Burroughs Corp | Electronic plotting device |
US3459926A (en) * | 1965-10-18 | 1969-08-05 | Ibm | Graphic vector generator |
US3403286A (en) * | 1966-12-27 | 1968-09-24 | Ibm | Digital cathode ray tube deflection system |
US3509542A (en) * | 1967-08-15 | 1970-04-28 | Sperry Rand Corp | Digital vector generator |
US3422304A (en) * | 1967-09-15 | 1969-01-14 | Ibm | Logic controlled deflection system |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4027148A (en) * | 1975-09-10 | 1977-05-31 | Lawrence David Rosenthal | Vector generator |
US4365305A (en) * | 1981-01-05 | 1982-12-21 | Western Electric Company, Inc. | Vector generator for computer graphics |
US4500879A (en) * | 1982-01-06 | 1985-02-19 | Smith Engineering | Circuitry for controlling a CRT beam |
Also Published As
Publication number | Publication date |
---|---|
DE1549874A1 (en) | 1970-03-05 |
US3510634A (en) | 1970-05-05 |
US3723802A (en) | 1973-03-27 |
DE1549874B2 (en) | 1970-11-05 |
FR1551898A (en) | 1969-01-03 |
GB1148849A (en) | 1969-04-16 |
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