US1796030A - Transmission and reception of pictures - Google Patents

Transmission and reception of pictures Download PDF

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Publication number
US1796030A
US1796030A US358078A US35807829A US1796030A US 1796030 A US1796030 A US 1796030A US 358078 A US358078 A US 358078A US 35807829 A US35807829 A US 35807829A US 1796030 A US1796030 A US 1796030A
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US
United States
Prior art keywords
elemental
picture
shade
impulses
screen
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
Application number
US358078A
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English (en)
Inventor
Ray D Kell
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co
Original Assignee
General Electric Co
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
Priority to BE369730D priority Critical patent/BE369730A/xx
Application filed by General Electric Co filed Critical General Electric Co
Priority to US358078A priority patent/US1796030A/en
Priority to FR694360D priority patent/FR694360A/fr
Priority to GB12805/30A priority patent/GB341811A/en
Application granted granted Critical
Publication of US1796030A publication Critical patent/US1796030A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
    • H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
    • H04N3/12—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by switched stationary formation of lamps, photocells or light relays
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/12—Systems in which the television signal is transmitted via one channel or a plurality of parallel channels, the bandwidth of each channel being less than the bandwidth of the television signal

Definitions

  • My invention relates to the transmission ference between the successive images of a and reception of pictures, and has for its picture or moving object. principal object the provision of an im roved
  • the picture transmitting apparatus of Fig. ap aratus and method of operation w ereby 1 includes a light source from which a 8 on y the difference between the successive beam of light is projected through a lense 11, 55 images of the picture or object is transmitted a scanning member 12 and a lens 13 upon a and received. 3 field of view including the object 14, the image Various types of picture transmitting apof which is to be transmitted.
  • the scanning paratus including either a radio transmitter disk 12 is provided with a plurality of 1 and receiver or a transmitter and receiver inspirally arranged perforations 15 and with so terconnected by electrical conductors have suitable driving means such as a motor 7, been provided in the past.
  • the beam of apparatus involve the use of both means for 'llght is utilized in a well known manner to producing light dependent on the shade of scan the field of view containing the object 15 successive elemental areas of the picture to 14 and light of an intensity dependent on 05 be transmitted and means for converting such he Shade f the S ccessive element-a1 areas light into electrical impulses which must be of the field containing the object is reflected reconverted into light at the picture receiv-' h r r m- 1 ing station.
  • This reflected light is received by one or It has been customary in the past to transmore light sensitive cells 16 which convert mit successive complete images of the transthe llght into electrlcal im ulses of an inmitted picture.
  • This method of pi tur tens ty dependent on the s ads of the suctransmission requires a band of frequencies 08851179 ent ar of the picture.
  • These dependent on the number of picture elements c r qal imp lses are apphed to a radio 25 and the number of images transmitted "per transmitter 17 through an amplifier l8 and v second. Since only a limited band of frea rm r 19, a phase shifting device 20 quencies are available for picture transmisof any fihle type, Such as that disclosed sion.
  • Phase shlfimg tune f y devlce image of the picture or Object and its fineness 20 is connected between the amplifier 18 and one section 21 of the primary winding of the gi gjg g i g t g ggg the speed of the transformer 19.
  • the other section 22 of this 40 primary winding is connected directly to the My mventmn W111 be better understood amplifier 18.
  • 5 lllustrate various details of an apparatus ing section 22 at one time and to the winding 60 which may be utilized to receive the dif-- section 21 at a subsequent time.
  • the time winding section 21 at the same time that the winding section 22 is being subjected to the electrical impulse produced by the next subsequent scanning of this elemental area.
  • the connection between the device 20 and the winding section 21 is such that-the original the delayed impulses produce opposing e acts in the transformer. Under these conditions, the'electrical impulses cancel one another when the shade of the given elemental area has not changed between successive scannings, and no si al is ap' lied to the radio transmitter. en the s ade of the elemental area changes,'however, the
  • impulses applied to the different winding sections.- are unequal and a si a1 corresponding to the change in sha e is transmitted.
  • apparatus Any suitable apparatus may be utilized to receive the transmitted electrical impulses and to produce an image which is shaded in accordance with these impulses.
  • One such apparatus is disclosed in a copending application of Augusto Bissiri, Serial N 0. 244,531, filed Jan. 4, 1928, and assigned to the same present application.
  • apparatus includes a screen which is illuminated from the side and is provided with a plurality of elements arranged to be moved into the range of. illumination to an extent determined by the intensity of the received electrical impulses.
  • Figs. 2 to 5 illustrate a screen 23 which is arranged to be illuminated by suitable light sources (not shown) mounted near its periphery and ,which is provided with a plurality of movable devices 25 and 26 are provided with contact members 27 and 28 which are connected to a radio receiver 29 and are mechanically cougiven 1,7ae,oso
  • gears 30 to 33 for the purpose of maintaining a definite relation between their speeds of rotation.
  • Power for drivin the contact devices suitab e means such as a motor 34 mounted on the same shaft as the gear 32 and operated at a speed which bears a predetermined relation to the sp he scanning disk 12 pled together through of the transmitting apparatus.
  • Each of the squares in the screen 23. represents one of a plurality of elemental surfaces which are controlled by the commutators 27 and 28, and
  • I may be moved in a direction perpendicular to the screen surface for the purpose of varying the amount of light reflected from them.
  • the actual construction of the screen is illustrated by Figs. 2, 3 and 5.
  • each elemental portion 24 of the screen may be made in the form of a pyramid, a cone or the like be supported on pivoted members 35 and arranged to be moved transversely to the surface of the screen by means of 'electro-responsive devices 36 which are energized in accordance with the current transmitted to them through the radio receiver 29 and the commutators 27 and 28.
  • the rapidity with which the electrical connections are changed from one to another of the electro-responsive devices 36 is dependent on the rotational speed of the driving motor 34 and ordinarily does not need to be faster than that required to complete the connections of all the electro-responsive devices more than once every ond.
  • the commutator 28 should e driven at a speed of 160 revolutions per second and the commutator 25 should be driven at a speed of 1600 revolutions per second.
  • Each of the elemental screen is gripped by a spring 39 when the electroresponsive elements 36 are deenergized.
  • Each of the electro-responsive devices 36 one-sixteenth of a sec-' screen element and the-coil 38 being arranged on the intensity of the electrical impulse applied to the coils.
  • the elemental screen section is gripped by the spring 39 and its position does not change until its electro-responsive device 36 is subjected to another impulse. Under these conditions the first complete scanning of the object causes the elemental screen sections 24 to assume positions dependent on the shade of the successive elemental areas of object.
  • the screen except the elemental surfaces are black; that these surfaces are white and that as the screen is continuously illuminated in a plane arallel with its surface.
  • the illumination and visibility of the image produced is altogether dependenton the position of the various elemental surfaces, these positions being determined by the shading of the object and being changed in accordance with the change in shading, which results from movement of the object.
  • a picture producing apparatus including means for scanning a field of view including a movable object, means arranged to generate electrical impulses dependent on the shade of the successive elemental areas of said field, and means 0 erable after the first complete scanning 0 said field to permit the transmission of only the electrical impulses corresponding to those elemental areas of said 'field, whichhave'changed shade subsequently to the previous scanning.
  • a picture producing apparatus includ- 65 ing means for scanning a field of view inare indicated. It will be observed cluding a movableobje'ct, means arranged to generate electrical impulses dependent on the shade of the successive elemental areas of said field, and phase control means operable after the first complete scanning of said field to permit the transmission of only the electrical impulses corres onding to the elemental areas of said fiel which have changed in shade subsequently tq the previous scannm g 3.
  • the method of icture transmission which includes roducmg an efiect dependent-on the sha e of all the successive elemental areas in a field of view including an object, and subsequentl producing an effect dependent on the sha e of those elemental areas only in said field whose shade has changed subsequently to the production of the first eflect.
  • a picture producing a paratus including means for scanning a eld of view including a movable object, means arranged to the shade of the successive elemental areas of said field, and phase control-means arranged to cause neutralization of the electrical im ulses which correspond to the shade of the e emental areas of said field whose shade remains unchanged.
  • Picture transmittlng apparatus comprising means for successively scanning a eld of view, means for generating electrical impulses dependent upon the shade of the seccessive elemental areas covered by the scanning means, means for producing from said impulses other impulses having a time delay equal to the intervals between the sucgenerate electrical impulses dependent on cessive scannings, combining means arranged to cause the originaland the delayed 1mpulses to oppose each other, and transmitting means responsive to the resultant impulses.
  • Picture transmitting apparatus comprising means for successiveively scanning a field of view, means for generating electrical impulses dependent upon the shade of the sucdelay device, said. primaries being arranged in op sition, and transmittin means connectef with the secondary 0 said transformer. 5 In witness whereof, I have hereunto set my hand this 24th day of A ril, 1929.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Burglar Alarm Systems (AREA)
  • Transforming Electric Information Into Light Information (AREA)
US358078A 1929-04-25 1929-04-25 Transmission and reception of pictures Expired - Lifetime US1796030A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE369730D BE369730A (enrdf_load_stackoverflow) 1929-04-25
US358078A US1796030A (en) 1929-04-25 1929-04-25 Transmission and reception of pictures
FR694360D FR694360A (fr) 1929-04-25 1930-04-24 Transmission d'images
GB12805/30A GB341811A (enrdf_load_stackoverflow) 1929-04-25 1930-04-25

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US358078A US1796030A (en) 1929-04-25 1929-04-25 Transmission and reception of pictures

Publications (1)

Publication Number Publication Date
US1796030A true US1796030A (en) 1931-03-10

Family

ID=23408212

Family Applications (1)

Application Number Title Priority Date Filing Date
US358078A Expired - Lifetime US1796030A (en) 1929-04-25 1929-04-25 Transmission and reception of pictures

Country Status (4)

Country Link
US (1) US1796030A (enrdf_load_stackoverflow)
BE (1) BE369730A (enrdf_load_stackoverflow)
FR (1) FR694360A (enrdf_load_stackoverflow)
GB (1) GB341811A (enrdf_load_stackoverflow)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2531831A (en) * 1947-10-29 1950-11-28 Rca Corp Method of image transmission
US2568721A (en) * 1946-08-10 1951-09-25 Int Standard Electric Corp Communication system utilizing constant amplitude pulses
US2605361A (en) * 1950-06-29 1952-07-29 Bell Telephone Labor Inc Differential quantization of communication signals
US2654885A (en) * 1949-12-19 1953-10-06 Padevco Inc Multiplex frequency modulation communication system
US3071649A (en) * 1946-06-19 1963-01-01 Bell Telephone Labor Inc Cipher system for pulse code modulation communication system
US3103007A (en) * 1959-03-23 1963-09-03 Donald G Gumpertz Luminous display device
US3109161A (en) * 1958-12-03 1963-10-29 Bell Telephone Labor Inc Electrical selection circuits
US3266033A (en) * 1962-11-23 1966-08-09 Stanford Research Inst Display panel having stationary and movable polarizing elements
US4186394A (en) * 1978-09-18 1980-01-29 Tadeusz Bobak Automatic display system and process
US4635114A (en) * 1983-11-15 1987-01-06 Robert Bosch Gmbh Adaptive television transmission system
US4819357A (en) * 1982-01-22 1989-04-11 Salam Hassan P A Information display devices
US4974095A (en) * 1983-11-01 1990-11-27 Anatoly Arov Method and apparatus for displaying an image
US5717423A (en) * 1994-12-30 1998-02-10 Merltec Innovative Research Three-dimensional display

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE68929363T2 (de) * 1988-10-13 2002-09-26 Matsushita Electric Industrial Co., Ltd. Schaltung zur Verarbeitung eines Fernsehsignals
US9569857B2 (en) 2013-09-05 2017-02-14 ReallyColor, LLC Conversion of digital images into digital line drawings
US9602835B2 (en) 2014-02-05 2017-03-21 ReallyColor, LLC Difference images and difference image strips

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3071649A (en) * 1946-06-19 1963-01-01 Bell Telephone Labor Inc Cipher system for pulse code modulation communication system
US2568721A (en) * 1946-08-10 1951-09-25 Int Standard Electric Corp Communication system utilizing constant amplitude pulses
US2531831A (en) * 1947-10-29 1950-11-28 Rca Corp Method of image transmission
US2654885A (en) * 1949-12-19 1953-10-06 Padevco Inc Multiplex frequency modulation communication system
US2605361A (en) * 1950-06-29 1952-07-29 Bell Telephone Labor Inc Differential quantization of communication signals
US3109161A (en) * 1958-12-03 1963-10-29 Bell Telephone Labor Inc Electrical selection circuits
US3103007A (en) * 1959-03-23 1963-09-03 Donald G Gumpertz Luminous display device
US3266033A (en) * 1962-11-23 1966-08-09 Stanford Research Inst Display panel having stationary and movable polarizing elements
US4186394A (en) * 1978-09-18 1980-01-29 Tadeusz Bobak Automatic display system and process
US4819357A (en) * 1982-01-22 1989-04-11 Salam Hassan P A Information display devices
US4974095A (en) * 1983-11-01 1990-11-27 Anatoly Arov Method and apparatus for displaying an image
US4635114A (en) * 1983-11-15 1987-01-06 Robert Bosch Gmbh Adaptive television transmission system
US5717423A (en) * 1994-12-30 1998-02-10 Merltec Innovative Research Three-dimensional display

Also Published As

Publication number Publication date
GB341811A (enrdf_load_stackoverflow) 1931-01-22
FR694360A (fr) 1930-12-03
BE369730A (enrdf_load_stackoverflow)

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