US3825922A - Channel plate display device having positive optical feedback - Google Patents

Channel plate display device having positive optical feedback Download PDF

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Publication number
US3825922A
US3825922A US00325852A US32585273A US3825922A US 3825922 A US3825922 A US 3825922A US 00325852 A US00325852 A US 00325852A US 32585273 A US32585273 A US 32585273A US 3825922 A US3825922 A US 3825922A
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US
United States
Prior art keywords
photo
channel plate
layer
cathode
cathodes
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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US00325852A
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English (en)
Inventor
J Ralph
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US Philips Corp
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US Philips Corp
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Publication date
Application filed by US Philips Corp filed Critical US Philips Corp
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Publication of US3825922A publication Critical patent/US3825922A/en
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Classifications

    • 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
    • H01J31/50—Image-conversion or image-amplification tubes, i.e. having optical, X-ray, or analogous input, and optical output
    • H01J31/506—Image-conversion or image-amplification tubes, i.e. having optical, X-ray, or analogous input, and optical output tubes using secondary emission effect
    • H01J31/507—Image-conversion or image-amplification tubes, i.e. having optical, X-ray, or analogous input, and optical output tubes using secondary emission effect using a large number of channels, e.g. microchannel plates
    • 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
    • H01J31/12—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen
    • H01J31/123—Flat display tubes
    • H01J31/125—Flat display tubes provided with control means permitting the electron beam to reach selected parts of the screen, e.g. digital selection
    • H01J31/127—Flat display tubes provided with control means permitting the electron beam to reach selected parts of the screen, e.g. digital selection using large area or array sources, i.e. essentially a source for each pixel group
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2201/00—Electrodes common to discharge tubes
    • H01J2201/34—Photoemissive electrodes
    • H01J2201/342—Cathodes

Definitions

  • FIG. 3 is a cross-section of the finished device of FIG. 2 taken along the line III-III, together with a channel electron multiplier plate and a viewing window.
  • Photo-cathode material 10 (FIG. 3) is then deposited in the cavities 7, the remainder of the upper surface 9 of the block 6 being masked while this is carried out.
  • a channel electron multiplier plate 11 is then placed in the space surrounded by the ridge 16, the plate 11 being provided with metal flanges 14 and 15, the flange 14 contacting the frame 4 and the flange 15 resting on the top of the ridge 16.
  • the plate 11 may be manufactured by a method described in US. Pat. 1,064,072 and each major surface thereof is coated with an electrically conductive layer (not shown) which layers contact the flange l4 and 15 respectively. These layers may be of vapour-deposited nickel-chromium and the major surfaces on which they are provided extend perpendicular to the channels in the plate.
  • the flange 15 is sealed all round to the top of the ridge 16 by a suitable solder glass (not shown) and a.
  • clear or translucent viewing window plate 17 is similarly sealed to an electrically insulating spacer 19 which is itself sealed to the flange 15.
  • a thin layer18 of cathode-luminescent material has been previously deposited on a transparent electrically conductive layer (not shown) e.g., of tin oxide itself deposited on'the underside of the window plate 17.
  • Electrically conductive supply strips (not shown) welded or otherwise secured to the flange l5 and the transparent electrically conductive layer form current supply conductors thereto.
  • the device After sealing, the device is pumped through the tube 12 so that the pressure inside is below 10 torr and the photo-cathodes are then activated. The metal 3 interconnecting the conductors 2 is removed.
  • the cathodo-luminescent material 18 is chosen to match the spectral sensitivity of the photo-cathodes 10, i.e., the photo-cathodes 10 are sensitive to at least part of the emission spectrum of the material 18.
  • the photocathodes 10 may be the type known as S 11.
  • An optical path exists between each photo-cathode 10 and the corresponding part of the layer 18 so that, if electrons from a given photo-cathode 10 reach and are multiplied in the plate 11 to bombard part of the layer 18, some of the resulting electromagnetic radiation emitted by the layer 18 returns to the relevant photo-cathode 10 to sustain the electron emission.
  • the fact that the channels in the plate 11 are perpendicular to the major surfaces of the plate assists this optical feedback.
  • the device operates as follows.
  • a steady positive potential of the order of l Kv is applied to the flange 15 relative to the flange 14, and hence to the side of the plate 11 facing the luminescent layer 18 relative to the other side of this plate.
  • a steady positive potential of e.g. 3 5 Kv is also applied to the conductive layer on which the luminescent layer 18 is deposited, relative to the flange 15. Any electrons, therefore, which are incident on the side of the multiplier plate 11 which faces the photo-cathodes 10 are multiplied in the plate,
  • any electron emitted by a photo-cathode 10 can reach the input face of the plate 11. Whether or not this occurs is easily regulated by making small adjustments to the potential of each photo-cathode 10 relative to that of the input surface of the plate 11.
  • a display can be obtained from any part of the layer 18 corresponding to a photo-cathode 10, and this display can be switched on and off by varying the potential of that photo-cathode by a few volts.
  • the photo-current from 'each photo-cathode need only be very small so that the photo-cathode can be switched by means of integrated circuits.
  • the spacings between the plate 11 and .both the photo-cathodes 10 and the layer 18 should be as small as possible, provided they are not so small that electrical breakdown occurs.
  • discrete areas of phosphors which are cathodo-luminescent in different colours may be provided in the layer 18, each colour, such as red, green and blue, being energisable by activating a different photo-cathode. In this way a multicoloured display may be obtained.
  • an addressing system of the cross-bar type is preferably used for the individual display elements.
  • Such a system may be formed by depositing an electrically conductive strip on the input surface of the plate 11 opposite each row or column of closes a display device comprising a plurality of selectively energisable display elements each comprising a channel electron multiplier element, an individual photo-cathode adjacent the input of said element, and cathodo-luminescent material situated in a path for electrons from the output of said element, said elements forming a channel electron multiplier plate.
  • the photo-cathodes are flooded with light from an external source to produce electron emission therefrom.
  • a display device comprising a plurality of selectively energisable display elements each comprising a channel electron multiplier element, an individual photo-cathode adjacent the input of said element, and cathodo-luminescent material situated in a path for electrons from the output of said element, said photocathode being sensitive to radiation emitted by said cathodo-luminescent material in response to electron bombardment and being situated in a path for said radiation from said material.
  • multiplier elements form a channel electron multiplier plate having its channels substantially perpendicular to its major surfaces.
  • a display device comprising:
  • a channel plate electron multiplier positioned adjacent one side of said layer to selectively bombard said layer with electrons from the output face thereof and to receive at the output face thereof electromagnetic radiation from said layer, the channels of said channel plate being sufficiently straight to pass therethroughfrom the output face to the input face thereof at least some of said received electromagnetic radiation, and
  • an array of selectively energizable photo-cathodes positioned adjacent the input face of said channel plate to selectively supply electrons to said channel plate and to receive electromagnetic radiation passing back through said channel plate from said layer, saidphoto-cathodes emitting electrons in response to said received electromagnetic radiation, thereby providing positive feedback.

Landscapes

  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
  • Electron Tubes For Measurement (AREA)
US00325852A 1972-02-08 1973-01-22 Channel plate display device having positive optical feedback Expired - Lifetime US3825922A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB578972 1972-02-08

Publications (1)

Publication Number Publication Date
US3825922A true US3825922A (en) 1974-07-23

Family

ID=9802662

Family Applications (1)

Application Number Title Priority Date Filing Date
US00325852A Expired - Lifetime US3825922A (en) 1972-02-08 1973-01-22 Channel plate display device having positive optical feedback

Country Status (5)

Country Link
US (1) US3825922A (enrdf_load_stackoverflow)
JP (1) JPS4893259A (enrdf_load_stackoverflow)
DE (1) DE2257234A1 (enrdf_load_stackoverflow)
FR (1) FR2171212A1 (enrdf_load_stackoverflow)
GB (1) GB1340456A (enrdf_load_stackoverflow)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3947842A (en) * 1973-05-23 1976-03-30 Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Electro-optic matrix-type display panel incorporating optoelectronic addressing switches
US4029984A (en) * 1975-11-28 1977-06-14 Rca Corporation Fluorescent discharge cold cathode for an image display device
US4031552A (en) * 1976-03-05 1977-06-21 The United States Of America As Represented By The Secretary Of The Army Miniature flat panel photocathode and microchannel plate picture element array image intensifier tube
US4034255A (en) * 1975-11-28 1977-07-05 Rca Corporation Vane structure for a flat image display device
US4051468A (en) * 1976-07-28 1977-09-27 Rca Corporation Apparatus and method for modulating a flat panel display device
US4142123A (en) * 1977-02-10 1979-02-27 Rca Corporation Image display device with optical feedback to cathode
US4156827A (en) * 1978-06-19 1979-05-29 The United States Of America As Represented By The Secretary Of The Army Matrix cathode channel image device
US4280125A (en) * 1979-07-27 1981-07-21 Xerox Corporation Thin vacuum panel display device
US4531122A (en) * 1982-07-14 1985-07-23 Redfield Lawrence J Flatscreen
US4577189A (en) * 1981-04-02 1986-03-18 Asea Aktiebolag Circuits with electro-optical feedback for display and a digitizer application
US4636629A (en) * 1985-04-02 1987-01-13 Galileo Electro-Optics Corp. Image-storage microchannel device with gating means for selective ion feedback
US4760305A (en) * 1985-09-11 1988-07-26 U.S. Philips Corporation Cathode ray display tubes
US4948965A (en) * 1989-02-13 1990-08-14 Galileo Electro-Optics Corporation Conductively cooled microchannel plates
US5600343A (en) * 1992-11-13 1997-02-04 Commissariat A L'energie Atomique Multiplexed matrix display screen and its control process
WO2003038791A3 (en) * 2001-10-31 2003-12-18 Zoltan Nemeth Optical display device and method for addressing the pixels of the same

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52135262A (en) * 1975-12-10 1977-11-12 Bosch Gmbh Robert Picture converter
EP0110598B1 (en) * 1982-11-18 1988-01-07 The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Information display devices

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3132325A (en) * 1959-09-24 1964-05-05 Gen Electric Electro-optical shift register
US3408532A (en) * 1965-12-06 1968-10-29 Northrop Corp Electron beam scanning device
US3723977A (en) * 1969-12-08 1973-03-27 Owens Illinois Inc Gas discharge panel with photoconductive material

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3132325A (en) * 1959-09-24 1964-05-05 Gen Electric Electro-optical shift register
US3408532A (en) * 1965-12-06 1968-10-29 Northrop Corp Electron beam scanning device
US3723977A (en) * 1969-12-08 1973-03-27 Owens Illinois Inc Gas discharge panel with photoconductive material

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3947842A (en) * 1973-05-23 1976-03-30 Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Electro-optic matrix-type display panel incorporating optoelectronic addressing switches
US4029984A (en) * 1975-11-28 1977-06-14 Rca Corporation Fluorescent discharge cold cathode for an image display device
US4034255A (en) * 1975-11-28 1977-07-05 Rca Corporation Vane structure for a flat image display device
US4031552A (en) * 1976-03-05 1977-06-21 The United States Of America As Represented By The Secretary Of The Army Miniature flat panel photocathode and microchannel plate picture element array image intensifier tube
US4051468A (en) * 1976-07-28 1977-09-27 Rca Corporation Apparatus and method for modulating a flat panel display device
US4142123A (en) * 1977-02-10 1979-02-27 Rca Corporation Image display device with optical feedback to cathode
US4156827A (en) * 1978-06-19 1979-05-29 The United States Of America As Represented By The Secretary Of The Army Matrix cathode channel image device
US4280125A (en) * 1979-07-27 1981-07-21 Xerox Corporation Thin vacuum panel display device
US4577189A (en) * 1981-04-02 1986-03-18 Asea Aktiebolag Circuits with electro-optical feedback for display and a digitizer application
US4531122A (en) * 1982-07-14 1985-07-23 Redfield Lawrence J Flatscreen
US4636629A (en) * 1985-04-02 1987-01-13 Galileo Electro-Optics Corp. Image-storage microchannel device with gating means for selective ion feedback
US4760305A (en) * 1985-09-11 1988-07-26 U.S. Philips Corporation Cathode ray display tubes
US4948965A (en) * 1989-02-13 1990-08-14 Galileo Electro-Optics Corporation Conductively cooled microchannel plates
US5600343A (en) * 1992-11-13 1997-02-04 Commissariat A L'energie Atomique Multiplexed matrix display screen and its control process
WO2003038791A3 (en) * 2001-10-31 2003-12-18 Zoltan Nemeth Optical display device and method for addressing the pixels of the same

Also Published As

Publication number Publication date
GB1340456A (en) 1973-12-12
JPS4893259A (enrdf_load_stackoverflow) 1973-12-03
DE2257234A1 (de) 1973-08-23
FR2171212A1 (enrdf_load_stackoverflow) 1973-09-21

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