US2264748A - Color television transmitter - Google Patents

Color television transmitter Download PDF

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Publication number
US2264748A
US2264748A US283748A US28374839A US2264748A US 2264748 A US2264748 A US 2264748A US 283748 A US283748 A US 283748A US 28374839 A US28374839 A US 28374839A US 2264748 A US2264748 A US 2264748A
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US
United States
Prior art keywords
image
plane
scanning
color
light
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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
Application number
US283748A
Inventor
Werner Flechsig
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Robert Bosch Fernsehanlagen GmbH
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Fernseh GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fernseh GmbH filed Critical Fernseh GmbH
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Publication of US2264748A publication Critical patent/US2264748A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/80—Arrangements for controlling the ray or beam after passing the main deflection system, e.g. for post-acceleration or post-concentration, for colour switching
    • H01J29/803—Arrangements for controlling the ray or beam after passing the main deflection system, e.g. for post-acceleration or post-concentration, for colour switching for post-acceleration or post-deflection, e.g. for colour switching
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/10—Cameras or camera modules comprising electronic image sensors; Control thereof for generating image signals from different wavelengths
    • H04N23/12—Cameras or camera modules comprising electronic image sensors; Control thereof for generating image signals from different wavelengths with one sensor only
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
    • H01J31/20—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes for displaying images or patterns in two or more colours
    • H01J31/201—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes for displaying images or patterns in two or more colours using a colour-selection electrode
    • H01J31/203—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes for displaying images or patterns in two or more colours using a colour-selection electrode with more than one electron beam
    • H01J31/206—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes for displaying images or patterns in two or more colours using a colour-selection electrode with more than one electron beam with three coplanar electron beams

Definitions

  • My Iinvention relates to a method and means for producing televisionimages in natural colors, and v.relates particularly to the picture analysis for this purpose.
  • I indicates a vacuum receptacle housing a storage electrode 2, an electron gun 3 and two sets of deflecting plates 4 and 5.
  • Such a tube may be the well-known Iconoscope or one of the various types of storage tubes known in the art.
  • a first optical image of an object indicated by arrow 'l is produced in the plane indicated by dotted line Il by means of schematically indicated optical system 8.
  • a light lter is arranged in plane Il, which may, for instance, consist of an endless film possessing adjacent film frames with diierent colors, whereby the color sequence is cyclically recurrent.
  • the individual film frame should be of the same dimensions as the optical image produced in the plane Il.
  • the light transmitted through the filter then goes through an optical system I0 by means of which a second image is projected upon storage member 2, which image consists of ltered light.
  • a iirst or intermediate image of the object 1 to be tr-ansmitted is projected by means of the optical system 8 in plane Il.
  • filter nlm 9 is moved in vertical direction.
  • the size of the individual lter sections covers at least the entire optical image produced in plane ll. It will be seen that certain color components are transmitted, while othersarezattenu-ated, wherebythe spectral range vof fatt-,enuation and. transmission is shifted with each filter section offdiierent color.
  • the second image ⁇ .projected ⁇ upon storage member 2 by means of optical system vIt) consists of filtered light.
  • Storage member 2. is scanned by a defined electron beam produced by electron gun 3 and deected in two dimensions by means of deflecting plates d and 5,: as ⁇ is common practice inthe television art. It is intended to make full use -of the entire storage time, which,at 30 ⁇ television images persecond, lis 349,0 second.- At the beginning of a frame scansion, the scanning :beam .may be at the upper left-.hand corner of the scanned area of photocathode 2. At this vtime a ilter section of nlm 9 is fully coincident with the first or intermediate optical image in plane Il so that the entire pictured area on-the-storage member 2 is of uniform color.
  • the .endless ⁇ iilter lm 9 l is also moved from topto bottom, whereby the boundary between adjacent .filter sections of dilerent colors may lag the scanning .beam Aby a, short distance only.
  • a red. image was projected upon storage member 2 during a certain interval and that this red image is just being scanned.
  • the iilter section of the iilm adjacent to the red one may be blue.
  • the lter lm is moved in the same direction, whereby the image of the boundary between red and blue filter sections on the storage member is made to follow the scanning beam within a short distance.
  • a mechanical device located between the shaft of the synchronous motor and the drive shaft of the lm sprocket enables shifting the relative position of the two shafts in respect to each other. Such devices are well-known in the art and can be used for adjusting the proper phase conditions between scanning beam and nlter nlm motion.
  • means for forming in a plane a first optical image of an object to be transmitted means for forming in a plane a first optical image of an object to be transmitted, light filtering means in said plane covering said image, means placed in the path of said light rays transmitted through said ltering means for forming a second optical image of said object in a second plane, a member of image area capable of storing energy in said second plane, means for successively scanning elemental areas of said member to produce a picture signal, means for moving said ltering means in consonance with the scansion of said member, whereby the color of the light incident upon said lastnamed areas is changed shortly after the scanning of said areas.
  • Method of producing picture signals for color television comprising the steps of successively projecting certain color components only of the image of the object to be transmitted Vupon a multitude of elemental areas of a member capable of storing energy, scanning said elemental areas one by one in successive order, and changing the color components of the light incident upon each of said elemental areas shortly after scansion of each of said areas.
  • Method of producing picture signals for color television comprising the steps of forming in a plane a rst optical image of the object to be transmitted, transmitting only a portion of the light spectrum for a portion of the area of said first image, transmitting only another portion of the light spectrum for the remaining portion of the area of said rst image, using said transmitted light to form a second optical image of said object on a member capable of storing energy located in a second plane, scanning said member to produce a train of picture signals and varying the ratio of the portions of said first image area at the same rate as the variation of the ratio of unscanned-to-scanned area of said member is effected and in consonance therewith, whereby the color of the light incident upon elemental areas of said energy-storing member is changed shortly after the scanning of said areas.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Color Television Image Signal Generators (AREA)

Description

Dea 2, 1941. y w FLECHSlG u 2,264,748
COLOR TELEVISION TRANSMITTER Filed July 1l 1959 /Pawee Mam/5 INVENTOR.
A WERNER FLECHS/G BY WW/ff WM ATTORNEYS.
Patented Dec. 2, 1941 COLOR TELEVISION TRANSMITTER Application July 11, 1939, Serial'No.1283,7r48= In Germany July 11,1938
Claims.
My Iinvention relates to a method and means for producing televisionimages in natural colors, and v.relates particularly to the picture analysis for this purpose.
.It has been proposed to segregate the image of :thenobject to be transmitted into two or three images 7with the fundamental colors red, blue and yellow.; to transmit signals corresponding to these color components simultaneously over separate channels or successively over a common channel. As a 4picture analyzing tube, so-called storage tubes :have been proposed which are well-known in the art. In such arrangements it is provided tosplit the optical .image into several images in accordance with the color components and to provide a separate analyzing tube for each color component. This procedure involves an increased amount Aof apparatus and considerable operating diiliculties, as will be evident to those skilled in the art.
It is .the object of this invention to overcome the aforesaid disadvantages and diiculties and to provide for a simple method and means for producing-picture signals for television in colors, including the use of so-called storage tubes. The invention shall now be explained in detail in connection with the drawing, which schematically shows an embodiment of the invention reduced to the simplest terms. I indicates a vacuum receptacle housing a storage electrode 2, an electron gun 3 and two sets of deflecting plates 4 and 5. Such a tube may be the well-known Iconoscope or one of the various types of storage tubes known in the art. A first optical image of an object indicated by arrow 'l is produced in the plane indicated by dotted line Il by means of schematically indicated optical system 8. A light lter is arranged in plane Il, which may, for instance, consist of an endless film possessing adjacent film frames with diierent colors, whereby the color sequence is cyclically recurrent. The individual film frame should be of the same dimensions as the optical image produced in the plane Il. The light transmitted through the filter then goes through an optical system I0 by means of which a second image is projected upon storage member 2, which image consists of ltered light.
In operation, a iirst or intermediate image of the object 1 to be tr-ansmitted is projected by means of the optical system 8 in plane Il. In this plane, filter nlm 9 is moved in vertical direction. The size of the individual lter sections covers at least the entire optical image produced in plane ll. It will be seen that certain color components are transmitted, while othersarezattenu-ated, wherebythe spectral range vof fatt-,enuation and. transmission is shifted with each filter section offdiierent color. Thus, the second image `.projected `upon storage member 2 by means of optical system vIt) consists of filtered light. Storage member 2..is scanned by a defined electron beam produced by electron gun 3 and deected in two dimensions by means of deflecting plates d and 5,: as `is common practice inthe television art. It is intended to make full use -of the entire storage time, which,at 30 `television images persecond, lis 349,0 second.- At the beginning of a frame scansion, the scanning :beam .may be at the upper left-.hand corner of the scanned area of photocathode 2. At this vtime a ilter section of nlm 9 is fully coincident with the first or intermediate optical image in plane Il so that the entire pictured area on-the-storage member 2 is of uniform color. As the scanning beam progresses from top to,bottom,.the .endless `iilter lm 9 lis also moved from topto bottom, whereby the boundary between adjacent .filter sections of dilerent colors may lag the scanning .beam Aby a, short distance only. Assume that a red. image was projected upon storage member 2 during a certain interval and that this red image is just being scanned. The iilter section of the iilm adjacent to the red one may be blue. As the scanning beam progresses downward in Vertical direction, the lter lm is moved in the same direction, whereby the image of the boundary between red and blue filter sections on the storage member is made to follow the scanning beam within a short distance. This may readily be accomplished by interlocking the scanning generators with the A. C. power mains, as is standard practice in television, and to drive the lter lm by a synchronous motor. A mechanical device located between the shaft of the synchronous motor and the drive shaft of the lm sprocket enables shifting the relative position of the two shafts in respect to each other. Such devices are well-known in the art and can be used for adjusting the proper phase conditions between scanning beam and nlter nlm motion.
While I have described my invention in connection with an endless lm plate carrying iilter sections of different colors, it may be understood that I do not wish to be limited to this particular means of color filtering, the broad idea of the invention being that a first or intermediate image of an object to be transmitted is produced in a plane; that certain color components of this image are transmitted while others are attenuated; and that a second image consisting of the transmitted light is projected upon a storage member which is scanned. Thus, it may be seen that modifications and changes of a preferred embodiment of my invention may be made well within the scope of my invention, as will be understood by those skilled in the art.
What I claim is:
1. In combination, means for forming in a plane a rst optical image of an object to be transmitted, light filtering means comprising unicolored areas of image area in said rst plane covering said iirst image, means placed in the path of said light rays transmitted through said iiltering means for forming a second optical image of said object in a second plane, a member of image area capable of storing energy'in said second plane, means for successively scanning elemental areas of said member to produce a picture signal, and means for moving said light ltering means, whereby the color of the light incident upon said last-named areas is changed shortly after the scanning of said areas.
2. In combination, means for forming in a plane a first optical image of an object to be transmitted, light filtering means in said plane covering said image, means placed in the path of said light rays transmitted through said ltering means for forming a second optical image of said object in a second plane, a member of image area capable of storing energy in said second plane, means for successively scanning elemental areas of said member to produce a picture signal, means for moving said ltering means in consonance with the scansion of said member, whereby the color of the light incident upon said lastnamed areas is changed shortly after the scanning of said areas.
3. In combination, means for forming in a plane a first optical image of an object to be transmitted, a plurality of different colored light filters of image area located in said plane and covering said image, means in the path of the light rays transmitted through said filtering means for forming a second optical image of said object in a second plane, a member of image area capable of storing energy in said second plane, means for scanning said member in two directions to produce a picture signal, and means for continuously moving said filtering means across said first optical image in the direction of one of said scanning motions and in consonance therewith, whereby the color of the light incident upon elemental areas of said energystoring member is changed shortly after the scanning of said areas.
4. Method of producing picture signals for color television, comprising the steps of successively projecting certain color components only of the image of the object to be transmitted Vupon a multitude of elemental areas of a member capable of storing energy, scanning said elemental areas one by one in successive order, and changing the color components of the light incident upon each of said elemental areas shortly after scansion of each of said areas.
5. Method of producing picture signals for color television, comprising the steps of forming in a plane a rst optical image of the object to be transmitted, transmitting only a portion of the light spectrum for a portion of the area of said first image, transmitting only another portion of the light spectrum for the remaining portion of the area of said rst image, using said transmitted light to form a second optical image of said object on a member capable of storing energy located in a second plane, scanning said member to produce a train of picture signals and varying the ratio of the portions of said first image area at the same rate as the variation of the ratio of unscanned-to-scanned area of said member is effected and in consonance therewith, whereby the color of the light incident upon elemental areas of said energy-storing member is changed shortly after the scanning of said areas.
WERNER FLECHSIG.
US283748A 1938-07-11 1939-07-11 Color television transmitter Expired - Lifetime US2264748A (en)

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Application Number Priority Date Filing Date Title
DE212754X 1938-07-11

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US (1) US2264748A (en)
BE (1) BE435375A (en)
CH (1) CH212754A (en)
FR (1) FR866065A (en)
IT (1) IT866065A (en)
NL (1) NL57286C (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2458649A (en) * 1941-01-31 1949-01-11 Rca Corp Color television
US2689879A (en) * 1951-03-26 1954-09-21 Miles P Rehorn Color television
US2755401A (en) * 1951-11-16 1956-07-17 Rca Corp Color television pickup tubes

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US2733164A (en) * 1956-01-31 Multi-color kinescope screen
US2595548A (en) * 1947-02-24 1952-05-06 Rca Corp Picture reproducing apparatus
US2630542A (en) * 1947-07-19 1953-03-03 Rca Corp Multicolor television
US2677073A (en) * 1947-12-02 1954-04-27 Du Mont Allen B Lab Inc Control device for simultaneous color television
US2660684A (en) * 1948-02-06 1953-11-24 Int Standard Electric Corp Electronic color television
US2643352A (en) * 1948-06-05 1953-06-23 Int Standard Electric Corp Color kinescope
US2622220A (en) * 1949-03-22 1952-12-16 Technicolor Motion Picture Television color screen
NL157249B (en) * 1949-12-17 Duvia Orazio VEHICLE WITH A LOAD OPENING AT THE TOP, WHICH CAN BE TIPPED AND LOADED.
US2650264A (en) * 1949-12-22 1953-08-25 Rca Corp Color television reproducing system
US2999185A (en) * 1950-01-09 1961-09-05 Harry R Lubcke Television device
US2806899A (en) * 1950-01-12 1957-09-17 Rca Corp Color television image reproducing system
US2696571A (en) * 1950-02-10 1954-12-07 Rca Corp Color kinescope
US2725418A (en) * 1950-02-21 1955-11-29 Rca Corp Color television receiving system
US2646521A (en) * 1950-03-23 1953-07-21 Rca Corp Color television picture tube
NL160445B (en) * 1950-04-25 Rca Corp SIGNAL INTERPRETATION STEP.
US2579665A (en) * 1950-04-29 1951-12-25 Rca Corp Color-kinescopes, etc.
BE503462A (en) * 1950-05-26
US2710890A (en) * 1950-06-01 1955-06-14 Nat Union Radio Corp Dot-screen type color television apparatus
US2757231A (en) * 1950-06-01 1956-07-31 Rca Corp One gun color-dot tube with dynamic beam convergence
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USRE23964E (en) * 1950-06-27 1955-03-22 jenny
US2741720A (en) * 1951-02-01 1956-04-10 Gen Electric Color television apparatus and methods
US2685660A (en) * 1951-04-07 1954-08-03 Gen Electric Television tube
US2634380A (en) * 1950-11-17 1953-04-07 Rca Corp Cathode-ray tube
US2755410A (en) * 1950-11-29 1956-07-17 Motorola Inc Color tube
US2687493A (en) * 1950-11-30 1954-08-24 Rca Corp Dynamic electron beam control system
USRE24740E (en) * 1950-11-30 1959-12-01 - electron beam convergence system
US2719249A (en) * 1950-12-22 1955-09-27 Rca Corp Beam alignment device
US2674704A (en) * 1950-12-28 1954-04-06 Rca Corp Storage tube for color television signals, etc.
US2687360A (en) * 1951-01-18 1954-08-24 Rauland Corp Process for making a multicolor fluorescent screen
US2690979A (en) * 1951-02-07 1954-10-05 Rca Corp Method of powder-coating television screens
CA523198A (en) * 1951-02-15 1956-03-27 Electric And Musical Industries Limited Cathode ray tubes
US2606303A (en) * 1951-02-17 1952-08-05 Bramley Jenny Color television tube and process
US2663821A (en) * 1951-06-16 1953-12-22 Rca Corp Masked target kinescope
NL170681B (en) * 1951-06-29 Philips Nv GLOW DISCHARGE LAMP WITH A HOLE FACED FLAT ELECTRODE.
US2722622A (en) * 1951-07-27 1955-11-01 Zenith Radio Corp Apparatus for the reproduction of images in color
US2757228A (en) * 1951-11-28 1956-07-31 Columbia Broadcasting Syst Inc Color television system
US2669675A (en) * 1952-01-08 1954-02-16 Chromatic Television Lab Inc Display surface for color television tubes
USRE25091E (en) * 1952-03-18 1961-11-28 Cathode-ray tubes of the lenticular grill variety
US2672574A (en) * 1952-03-19 1954-03-16 Rca Corp Magnetic beam controlling system
US2880358A (en) * 1952-04-08 1959-03-31 Motorola Inc Color television system
US2713649A (en) * 1952-04-08 1955-07-19 Motorola Inc Voltage control circuit
US3011090A (en) * 1952-06-24 1961-11-28 Rca Corp Plural beam tube
BE521804A (en) * 1952-07-30
US2723305A (en) * 1952-09-17 1955-11-08 Chromatic Television Lab Inc Apparatus for projecting television images in color
US2727184A (en) * 1952-10-09 1955-12-13 Westinghouse Electric Corp Servo controlled tri-color television tube
US2707248A (en) * 1952-11-26 1955-04-26 Rca Corp Electromagnetic beam-convergence systems for tri-color kinescopes
US2722623A (en) * 1953-03-31 1955-11-01 Rca Corp Color-kinescopes etc.
US2691116A (en) * 1953-03-31 1954-10-05 Rca Corp Color-kinescopes, etc.
US2690518A (en) * 1953-06-01 1954-09-28 Columbia Broadcasting Syst Inc Color picture tube
US2783406A (en) * 1954-02-09 1957-02-26 John J Vanderhooft Stereoscopic television means
US3016474A (en) * 1954-05-11 1962-01-09 Raytheon Co Cathode ray tubes
US2951178A (en) * 1955-01-07 1960-08-30 Philco Corp Multi-beam cathode-ray tube transducer
GB821542A (en) * 1955-02-12 1959-10-07 Emi Ltd Improvements in or relating to cathode ray tubes
US2795720A (en) * 1955-09-15 1957-06-11 Rca Corp Post-accelerated color-kinescopes
NL215405A (en) * 1956-03-16
US3070441A (en) * 1958-02-27 1962-12-25 Rca Corp Art of manufacturing cathode-ray tubes of the focus-mask variety
US3252030A (en) * 1960-06-21 1966-05-17 Diamond Power Speciality Photoelectric camera tube with transistor-type photoanode
US3231380A (en) * 1960-11-14 1966-01-25 Rca Corp Art of making electron-optical reticles

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2458649A (en) * 1941-01-31 1949-01-11 Rca Corp Color television
US2689879A (en) * 1951-03-26 1954-09-21 Miles P Rehorn Color television
US2755401A (en) * 1951-11-16 1956-07-17 Rca Corp Color television pickup tubes

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Publication number Publication date
FR866065A (en) 1941-06-16
CH212754A (en) 1940-12-15
NL57286C (en)
IT866065A (en)
BE435375A (en)

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