US3710173A - Direct viewing storage tube having mesh halftone target and nonmesh bistable target - Google Patents
Direct viewing storage tube having mesh halftone target and nonmesh bistable target Download PDFInfo
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- US3710173A US3710173A US00047005A US3710173DA US3710173A US 3710173 A US3710173 A US 3710173A US 00047005 A US00047005 A US 00047005A US 3710173D A US3710173D A US 3710173DA US 3710173 A US3710173 A US 3710173A
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- storage
- target
- dielectric
- phosphor
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- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 56
- 239000000463 material Substances 0.000 claims abstract description 12
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 9
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 7
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 7
- 239000011810 insulating material Substances 0.000 claims description 7
- 239000011521 glass Substances 0.000 claims description 5
- 239000003989 dielectric material Substances 0.000 claims description 2
- -1 magnesium oxide Chemical class 0.000 abstract description 2
- 239000004020 conductor Substances 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- 230000014759 maintenance of location Effects 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 3
- 229910001887 tin oxide Inorganic materials 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000010894 electron beam technology Methods 0.000 description 2
- 239000011572 manganese Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 235000007889 Osmunda cinnamomea Nutrition 0.000 description 1
- 244000239204 Plantago lanceolata Species 0.000 description 1
- 235000010503 Plantago lanceolata Nutrition 0.000 description 1
- 239000005083 Zinc sulfide Substances 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- ZOIVSVWBENBHNT-UHFFFAOYSA-N dizinc;silicate Chemical compound [Zn+2].[Zn+2].[O-][Si]([O-])([O-])[O-] ZOIVSVWBENBHNT-UHFFFAOYSA-N 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 229940074869 marquis Drugs 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 230000002688 persistence Effects 0.000 description 1
- VBUNOIXRZNJNAD-UHFFFAOYSA-N ponazuril Chemical compound CC1=CC(N2C(N(C)C(=O)NC2=O)=O)=CC=C1OC1=CC=C(S(=O)(=O)C(F)(F)F)C=C1 VBUNOIXRZNJNAD-UHFFFAOYSA-N 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052984 zinc sulfide Inorganic materials 0.000 description 1
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 description 1
Images
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
- H01J31/10—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
- H01J31/18—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen with image written by a ray or beam on a grid-like charge-accumulating screen, and with a ray or beam passing through and influenced by this screen before striking the luminescent screen, e.g. direct-view storage tube
-
- 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
- H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
- H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
Definitions
- Hutchins, IV et al. 1 Jan. 9, 1973 [s41 DIRECT VIEWING STORAGE TUBE 3,531,675 9/1910 Frankland .smss R HAVING MESH HALFTONE TARGET AND NQNMESH BISTABLE TARGET Primary Examiner-Benjamin A. Borchelt Assistant Examiner-S. C. Buczinski [75] Inventors: Thomas B. Hutchina, IV, Portland, Almmey auckhomy more marquis; sparkman 0reg.; William M. Templeton, Seattle, Wash.
- the bistable storage target may be of the nonmesh type [58] Field of Search 13 68 68 that employs a storage dielectric of phosphor material 313/68 92 R which emits a light image corresponding to the charge image stored thereon.
- the subject matter of the present invention relates generally to charge image storage tubes, and in particular to charge transfer storage tubes employing two storage targets including a halftone storage target of low density and a bistable storage target of higher density.
- the bistable target may be of a nonmesh type having a storage dielectric of phosphor material which emits a light image corresponding to the charge image stored thereon.
- the storage tube of the present invention also includes transfer means for transferring the charge image written on the halftone storage target to the bistable storage target for longer storage by using low-velocity flood electrons.
- the halftone storage target in the present tube is made of a more porous and lower density dielectric than the bistable target so that such halftone target is capable of an extremely high writing speed.
- the charge image of the input signal may first be written on the halftone target by deflecting the writing beam with such input signal and then such charge image is subsequently transferred to the bistable target by the flood electrons for storage.
- the tube of the present invention has the advantages of both the high writing speed of a conventional halftone storage tube and the long retention time of a conventional bistable storage tube without the disadvantages of such tubes.
- the tube of the present invention actually outperforms such conventional tubes.
- the meshes of the two storage targets of the prior art are close together and of substantially the same size, at some potentials moire" patterns are produced in the electron image which tend to distort the display produced on the fluorescent screen, and are avoided in the tube of the present invention.
- the secondary electrons emitted from the bistable target are collected by a collector electrode on the other side of the halftone target so that the field of the halftone target tends to prevent efficient collection and a fourth mesh electrode may be required between the halftone target and the bistable target. No such additional collector mesh electrode is required in the present tube because the secondary electrons emitted from the bistable target are collected by its own target electrode.
- this storage tube is not a direct viewing storage tube and only produces a readout in the form of an electrical readout signal by scanning the storage dielectric with a reading beam of electrons.
- Another object of the invention is to provide such a storage tube with a bistable storage target of nonmesh type having a phosphor storage dielectric which is employed, along with a halftone storage target of the mesh type and means for writing a charge image on the halftone target, for transferring the charge image to the bistable storage target and for storage and display of such charge image on the bistable target.
- a further object of the present invention is to provide such a storage tube which is capable of halftone storage and bistable storage, as well as such transfer storage operation.
- Still another object of the invention is to provide such a storage tube in which the storage dielectric of the halftone target is made of a porous insulating material having a density less than l0 percent of its normal bulk density to provide an extremely low capacitance and high writing speed.
- FIG. 1 is a diagrammatic view showing one embodiment of the storage tube of the present invention and associated electrical circuitry;
- FIG. 2 is a horizontal section view taken along the line 2-2 of FIG. 1 showing a portion of the tube on an enlarged scale;
- FIG. 3 is an elevation view of another embodiment of the bistable storage target in the tube of FIG. 1;
- FIG. 3A is a vertical section view taken along the line 3A--3A of FIG. 3;
- FIG. 4 is an elevation view of a third embodiment of the bistable storage target employed in the storage tube of FIG. I.
- FIG. 4A is a vertical section view taken along the line 4A-4A of FIG. 4.
- one embodiment of the direct view storage tube of the present invention includes a first halftone storage target 10 and a second bistable storage target 12 which are mounted within one end of an evacuated envelope 14.
- An electron gun l6, hereafter referred to as the writing" gun is also mounted in the envelope 14 at the opposite end thereof and includes a cathode 18 connected to a highly negative D.C. voltage source of about I kilovolt.
- a narrow focused beam of high-velocity electrons is emitted by the writing gun l6 and transmitted between a pair of horizontal deflection plates 20 and a pair of vertical deflection plates 22 onto the storage targets 10 and I2 to produce charge images thereon.
- a pair of flood" electron guns 24 having grounded cathodes 26 are provided within the envelope 14 in a position so that they uniformly bombard the storage targets 10 and 12 with low-velocity flood electrons.
- the halftone storage target 10 is a mesh-type target including a mesh target electrode 28 of metal coated with a storage dielectric 30 of highly porous insulating material to provide a low-capacitance target which is capable of an extremely high writing speed but only retains the charge image formed thereon a very short time of a few seconds.
- the mesh target electrode 28 may be formed of a woven wire mesh of stainless steel or nickel having about 200 lines per inch, or of a flat sheet of metal which has been etched or otherwise perforated to form openings therein.
- the openings 32 in the storage target 10 enable the flood electrons as well as the writing beam electrons to pass therethrough.
- the halftone storage dielectric 30 may be a porous metal oxide, such as magnesium oxide or aluminum oxide, having a high resistivity and low density of less than 10 percent of its normal bulk density to provide such target with an extremely low capacitance.
- a target using a storage dielectric 30 of magnesium oxide having a density between 2 and percent of its normal bulk density and a thickness of up to 30 microns had a writing speed of about 300 million to 600 million centimeters per second, and a viewing time ofabout 1 second.
- a second mesh electrode 34 is provided in spaced relationship to the first storage target on the side thereof remote from the second storage target 12.
- the mesh electrode 34 may have a larger mesh than target electrode 28 and functions as an ion repeller to prevent positive ions of residual gas from damaging the storage targets and, in some cases, may also function as a collector of secondary emission electrons.
- a collimating electrode 36 is provided as a ring-shaped coating of conducting material on the inner surface of the envelope 14 between the storage targets and the flood guns 24.
- the collimating electrode is connected to a positive D.C. voltage of +50 volts in order to collimate the low-velocity flood electrons so that they strike the bistable storage target 12 substantially perpendicular thereto. It should be noted that the collimating electrode 36 may in reality be a plurality of separate collimating electrodes of different potential.
- one embodiment of the bistable storage target 12 includes a storage dielectric 38 of phosphor material provided as an undivided layer over a light-transparent conductive film 40 of tin oxide or other suitable material coated on a light-transparent glass plate 42 which may be the faceplate of the cathode ray tube.
- the conductive film target electrode 40 serves as a collector electrode for the secondary electrons emitted from the phosphor storage dielectric 32.
- the undivided phosphor layer 38 is made sufficiently porous to enable secondary electrons to be transmitted therethrough so that such secondary electrons are emitted from the bombarded surface on the left side of the layer and are collected by the conductive film electrode 40 on the right-hand side of such layer.
- the second storage target 12 is capable of bistable storage of the charge image formed thereon.
- This bistable storage target is also described in US. Pat. No. 3,293,473 of R. H. Anderson, referred to above.
- the halftone storage dielectric 30 is much more porous than the phosphor storage dielectric 38 which has a density of about 50 percent of its normal bulk density so that the halftone storage target 10 has a lower capacitance than the bistable storage target.
- the phosphor material of the bistable storage target 12 emits a light image corresponding to the charge image stored thereon which is viewed through the glass support plate 42 and the transparent conductive film 40.
- Any suitable high resistance phosphor material may be employed for storage dielectric 38, including zinc orthosilicate with a manganese activator (Zn,SiO,:Mn) known as P-l phosphor, or one of the zinc sulfide phosphors such as P31 phosphor.
- Zn,SiO,:Mn manganese activator
- P-l phosphor manganese activator
- P31 phosphor zinc sulfide phosphors
- the operation of the storage tube of the present invention is controlled by the four-position switches 44, 46 and 48 of FIG. I which are connected respectively to the ion repeller electrode 34, the first target electrode 28 and the second target electrode 40.
- switch 44 applies a D.C. voltage of volts to the mesh electrode 34
- switch 46 applies a D.C. voltage of +200 volts to the first target electrode 28
- switch 48 applies a D.C. voltage of+l 00 to +150 volts to the second target electrode 40.
- the electron beam emitted by the writing gun 16 passes through the mesh electrode 34 and the first storage target 10 and strikes the phosphor storage dielectric 38 of the second storage target to produce a charge image thereon.
- the flood electrons emitted by the flood gun 24 also pass through the mesh electrode 34 and the first storage target 10 due to their high positive voltage, and bombard the phosphor storage dielectric 38 to cause bistable storage of the charge image when the initial potential of such charge image exceeds the first crossover voltage of such dielectric.
- the first crossover voltage is about +50 volts so that for bistable storage the operating level potential of the target or collector electrode 40 is above such first crossover voltage but below the second crossover voltage of +200 volts.
- the flood electrons drive the potential of the charge image up to the voltage of the collector electrode 40 and drive the potential of the unwritten background areas down to the voltage of the flood gun cathode to cause bistable storage.
- the flood electrons also cause the phosphor storage dielectric to emit a light image corresponding to the stored charge image.
- the writing beam of electrons is deflected by deflection plates and 22 in the manner of a conventional cathode ray oscilloscope.
- an input signal whose waveform is to be stored is applied to an input terminal 50 and transmitted through a vertical amplifier 52 to the vertical deflection plates 22.
- a portion of this input signal is transmitted to a trigger generator circuit 54 which produces a corresponding trigger pulse that is applied to a horizontal ramp generator circuit 56 to cause such ramp generator to produce a ramp or sawtooth voltage which is applied to the horizontal deflection plates 20.
- the vertical amplifier 52 has a delay line to enable the ramp signal to be generated and then applied to the horizontal deflection plates at the same time the input signal is applied to the vertical deflection plates, as in the conventional trigger operation of an oscilloscope.
- the storage tube of FIG. 1 is also capable of halftone storage operation by movement of the switches 44, 46 and 48 to the second position labeled "Halftone Storage" so that switch 44 applies a D.C. voltage of +l00 volts to mesh electrode 34, switch 46 applies a D.C. voltage of 20 volts to the first target electrode 28, and switch 48 applies a DC. voltage of +3 kilovolts to the second target electrode 40.
- the electron beam of the writing gun 16 forms a positivegoing charge image on the halftone storage dielectric 30 by secondary electron emission.
- the portion of the writing beam striking the bistable storage dielectric 38 does not produce a stored charge image due to the high voltage on the second target electrode 40.
- the flood electrons transmitted through the mesh electrode 34 pass through the apertures 32 in the first target electrode 28 and are modulated by the charge image on the halftone storage dielectric 30 so that a corresponding light image is produced on the phosphor layer 38.
- the light image is of extremely high brightness because the flood electrons are accelerated through an electrical field of 3 kilovolts.
- the surface of the halftone storage dielectric 30 is initially charged to a voltage near that of the 20 volts applied to the first target electrode 28 and is subsequently charged positive in the area of the charge image so that more flood electron current is transmitted through the mesh apertures 32 adjacent such positive image areas of the storage dielectric.
- a DC. voltage of +1 50 volts is applied to the mesh electrode 34
- a D.C. voltage of +100 to +l50 volts is applied to the second target electrode 40
- the first target electrode 28 is connected through an auxiliary switch 58 first to a voltage of -20 volts and subsequently to a voltage of +200 volts.
- a charge image is written on the storage dielectric 30 of the first target 10, and when such switch is moved to the second position labeled Bistable Storage,” this charge image is transferred to the phosphor storage dielectric 38 of the bistable storage target 12 by the flood electrons transmitted through the halftone target 10.
- the storage tube has an extremely fast writing speed, equal to that of the halftone storage target 10, and also has an extremely long storage time, equal to that of the bistable storage tube 12.
- the auxiliary switch 58 is not a manual switch but an electronic switch so that the charge image transfer is accomplished in a fraction of a second after such charge image is written on the halftone target.
- the charge image written on the halftone target need only be a few volts positive with respect to its unwritten background areas so that such halftone target has an even faster writing speed than would otherwise be possible without such image transfer.
- a D.C. voltage of+l 50 volts is applied to the ion repeller mesh electrode 34 while the target electrodes 28 and 40 are respectively connected by switches 46 and 48 to the outputs of an erase pulse generator 60.
- the erase pulse generator applies a positive voltage to the first target electrode 28 so that the storage dielectric 30 is charged uniformly positive by the flood electrons and then is returned to its quiescent voltage level of 20 volts.
- the erase pulse generator applies a positive voltage pulse to the target electrode 40 of the bistable target so that the storage dielectric 38 is driven above its retention threshold voltage, approximately equal to the second crossover voltage, to cause the entire dielectric to charge uniformly positive and then such voltage is reduced below its retention threshold" voltage, approximately equal to the first crossover voltage, and then slowly returned to its quiescent voltage of+l00 to +150 volts.
- the quiescent operating level of the bistable storage target electrode 40 is between the retention threshold" voltage, below which storage is not possible, and the fade positive" voltage, above which storage is not possible.
- Bistable storage target 12' includes a plurality of separate dots or areas 62 of phosphor material provided within the apertures of an apertured target electrode layer 64 of conducting material.
- the layer 64 may be of lighbtransparent conductive material, such as tin oxide, but may also be a light-opaque conductive material, such as aluminum.
- This embodiment has the advantage that the phosphor dots 62 may be made of greater thickness than the phosphor layer 38 of FIG. 2 and thereby provide a light image of greater brightness while still enabling bistable storage, as described in US. Pat. N0. 3,293,474 OF C. B. Gibson, issued Dec. 20, 1966.
- a third embodimentof the bistable storage target is shown in FlGS. 4 and 4A as target 12".
- the glass support plate 42 is etched on its inner surface to provide a plurality of conical glass projections 66.
- the projections 66 and the land areas between such projections are coated with a light-transparent conductive layer 68 of tin oxide and a bistable storage dielectric layer 70 of phosphor material is provided over such transparent conductive layer.
- the phosphor layer 70 is of a proper thickness such that the tips of the projections 66 extend through such layer to expose the portions of the transparent conductive coating 68 on such tips.
- the transparent conductive coating 68 of FIG. 4 functions as a collector electrode for the secondary electrons emitted from the phosphor layer 70, as does the mesh electrode 64 in FIG. 3 for the secondary electrons emitted by phosphor dots 62. Because of this use of the target electrode in the bistable target as the collector electrode, no additional collector electrode mesh is necessary between the two storage targets.
- the storage tube of the present invention may also be operated in any other conventional mode previously used for the operation of a halftone storage tube, such as a variable persistence mode during which the storage time of the halftone charge image is varied by adjusting the time of application of the erase pulses to the target electrode 28.
- the storage tube may be operated in a write-through mode in which a nonstored charge image is formed on the bistable target adjacent to a stored charge image by either reducing the writing beam current density or duty cycle pulsing the writing beam to reduce the charge image voltage below the first crossover voltage.
- electrical readout may be achieved by employing the writing gun 16 as a reading beam which is uniformly scanned across the surface of the bistable storage target by horizontal and vertical ramp signals of about 60 hertz and 15,750 hertz frequency, respectively, in the manner of a television raster.
- a charge transfer storage tube apparatus in which the improvement comprises:
- a first storage target including a first target electrode of a mesh structure having a first storage dielectric of highly porous low density insulating material coated thereon so as to leave the mesh apertures open to enable the transmission of electrons therethrough;
- a second storage target including a second target electrode and a second storage dielectric of higher density insulating material capable of bistable storage, said first dielectric being ofa more porous and lower density material than said second dielectric so that said first target has the lower capacitance and faster maximum stored writing speed than the second target while said second target has the longer storage time of the two targets;
- writing means for producing a narrow beam of highvelocity electrons and for forming charge images on at least said first storage target with said beam;
- transfer and storage means for directing low-velocity electrons at said first target and transmitting at least some of them through the mesh apertures of said first target onto the second storage dielectric of said second target to enable a charge image formed on said first target to be transferred to said second target and stored thereon.
- a storage tube apparatus in accordance with claim 3 in which the second storage dielectric is capable of bistable image storage by secondary electron emission when bombarded by said low-velocity electrons, and the transfer and storage means includes a collector means for collecting the secondary electrons emitted by said second dielectric.
- a storage tube apparatus in accordance with claim 1 which also includes bias means for selectively applying different DC bias voltages to the first and second target electrodes to provide the storage tube with bistable storage, halftone storage, or nonstorage display operation as well as the aforementioned charge transfer operation.
- a storage tube apparatus in accordance with claim 2 in which the second target electrode is a light transparent conductive film provided beneath the phosphor storage dielectric and the phosphor storage dielectric is an undivided phosphor layer which is sufficiently porous to enable secondary electrons emitted therefrom by the bombardment of low-velocity electrons to be transmitted through the phosphor layer and collected by said conductive film to enable bistable storage of charge images formed on said phosphor layer.
- a storage tube apparatus in accordance with claim 8 in which the magnesium oxide has a density of about 2 to 5 percent of its normal bulk density.
- a storage tube apparatus in accordance with claim 1 which also includes a mesh electrode separate from the storage targets and supported on the side of the first storage target remote from said second target.
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- Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
- Gas-Filled Discharge Tubes (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US4700570A | 1970-06-17 | 1970-06-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3710173A true US3710173A (en) | 1973-01-09 |
Family
ID=21946536
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US00047005A Expired - Lifetime US3710173A (en) | 1970-06-17 | 1970-06-17 | Direct viewing storage tube having mesh halftone target and nonmesh bistable target |
Country Status (7)
Country | Link |
---|---|
US (1) | US3710173A (de) |
JP (1) | JPS534394B1 (de) |
CA (1) | CA949681A (de) |
DE (1) | DE2129909C2 (de) |
FR (1) | FR2097926A5 (de) |
GB (1) | GB1306761A (de) |
NL (1) | NL7108308A (de) |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3798477A (en) * | 1972-08-03 | 1974-03-19 | Tektronix Inc | Storage tube with target having conductive surface exposed through random cracks in dielectric coating |
US3798494A (en) * | 1971-12-08 | 1974-03-19 | Tektronix Inc | Non-storage electron multiplier operation of transmission storage tube |
US3836811A (en) * | 1973-05-17 | 1974-09-17 | Tektronix Inc | Means for reducing effects of differential cutoff |
US3950669A (en) * | 1974-04-24 | 1976-04-13 | Rca Corporation | Erasing method for storage tube employing raster scan |
US3956662A (en) * | 1973-04-30 | 1976-05-11 | Tektronix, Inc. | Cathode ray storage tube having a target dielectric provided with particulate segments of collector electrode extending therethrough |
US4106937A (en) * | 1976-01-02 | 1978-08-15 | Tektronix, Inc. | Cathode ray storage tube having a target dielectric provided with particulate segments of collector electrode extending therethrough |
US4110659A (en) * | 1976-02-18 | 1978-08-29 | Tektronix, Inc. | Cathode ray tube storage target having increase life |
US4121255A (en) * | 1975-03-24 | 1978-10-17 | U.S. Philips Corporation | Television camera apparatus |
US4130775A (en) * | 1977-01-17 | 1978-12-19 | Tektronix, Inc. | Charge image charge transfer cathode ray tube having a scan expansion electron lens system and collimation electrode means |
US4142128A (en) * | 1977-04-18 | 1979-02-27 | Tektronix, Inc. | Box-shaped scan expansion lens for cathode ray tube |
US4159439A (en) * | 1976-08-02 | 1979-06-26 | Tektronix, Inc. | Bistable storage cathode ray tube |
US4254360A (en) * | 1980-04-08 | 1981-03-03 | Tektronix, Inc. | Insulated web collector storage target for a cathode ray tube |
US4284661A (en) * | 1976-08-02 | 1981-08-18 | Tektronix, Inc. | Process for making bistable storage cathode ray tube |
US4335328A (en) * | 1979-05-24 | 1982-06-15 | Tektronix, Inc. | Selectively erasable storage target with insulated web collector |
US4801850A (en) * | 1987-07-28 | 1989-01-31 | Xerox Corporation | High brightness vacuum fluorescent display (VFD) devices |
US6979947B2 (en) * | 2002-07-09 | 2005-12-27 | Si Diamond Technology, Inc. | Nanotriode utilizing carbon nanotubes and fibers |
US20080012461A1 (en) * | 2004-11-09 | 2008-01-17 | Nano-Proprietary, Inc. | Carbon nanotube cold cathode |
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US3165664A (en) * | 1960-03-21 | 1965-01-12 | English Electric Valve Co Ltd | Signal storage tubes utilizing high and low capacitance storage electrodes |
US3197661A (en) * | 1960-02-22 | 1965-07-27 | English Electric Valve Co Ltd | Signal storage tubes |
US3213316A (en) * | 1962-12-03 | 1965-10-19 | Westinghouse Electric Corp | Tube with highly porous target |
US3293474A (en) * | 1963-08-01 | 1966-12-20 | Tektronix Inc | Phosphor dielectric storage target for cathode ray tube |
US3293473A (en) * | 1962-03-19 | 1966-12-20 | Tektronix Inc | Thin, porous storage phosphor layer |
US3531675A (en) * | 1967-02-28 | 1970-09-29 | Tektronix Inc | Cathode ray storage tube having a target dielectric with collector electrodes extending therethrough |
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US3432717A (en) * | 1965-02-05 | 1969-03-11 | Hughes Aircraft Co | Moving target visual indicator tube |
-
1970
- 1970-06-17 US US00047005A patent/US3710173A/en not_active Expired - Lifetime
-
1971
- 1971-06-09 GB GB1975171*[A patent/GB1306761A/en not_active Expired
- 1971-06-15 JP JP4290071A patent/JPS534394B1/ja active Pending
- 1971-06-16 DE DE2129909A patent/DE2129909C2/de not_active Expired
- 1971-06-16 FR FR7121835A patent/FR2097926A5/fr not_active Expired
- 1971-06-17 CA CA115,966A patent/CA949681A/en not_active Expired
- 1971-06-17 NL NL7108308A patent/NL7108308A/xx unknown
Patent Citations (6)
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---|---|---|---|---|
US3197661A (en) * | 1960-02-22 | 1965-07-27 | English Electric Valve Co Ltd | Signal storage tubes |
US3165664A (en) * | 1960-03-21 | 1965-01-12 | English Electric Valve Co Ltd | Signal storage tubes utilizing high and low capacitance storage electrodes |
US3293473A (en) * | 1962-03-19 | 1966-12-20 | Tektronix Inc | Thin, porous storage phosphor layer |
US3213316A (en) * | 1962-12-03 | 1965-10-19 | Westinghouse Electric Corp | Tube with highly porous target |
US3293474A (en) * | 1963-08-01 | 1966-12-20 | Tektronix Inc | Phosphor dielectric storage target for cathode ray tube |
US3531675A (en) * | 1967-02-28 | 1970-09-29 | Tektronix Inc | Cathode ray storage tube having a target dielectric with collector electrodes extending therethrough |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3798494A (en) * | 1971-12-08 | 1974-03-19 | Tektronix Inc | Non-storage electron multiplier operation of transmission storage tube |
US3798477A (en) * | 1972-08-03 | 1974-03-19 | Tektronix Inc | Storage tube with target having conductive surface exposed through random cracks in dielectric coating |
US3956662A (en) * | 1973-04-30 | 1976-05-11 | Tektronix, Inc. | Cathode ray storage tube having a target dielectric provided with particulate segments of collector electrode extending therethrough |
US3836811A (en) * | 1973-05-17 | 1974-09-17 | Tektronix Inc | Means for reducing effects of differential cutoff |
US3950669A (en) * | 1974-04-24 | 1976-04-13 | Rca Corporation | Erasing method for storage tube employing raster scan |
US4121255A (en) * | 1975-03-24 | 1978-10-17 | U.S. Philips Corporation | Television camera apparatus |
US4106937A (en) * | 1976-01-02 | 1978-08-15 | Tektronix, Inc. | Cathode ray storage tube having a target dielectric provided with particulate segments of collector electrode extending therethrough |
US4110659A (en) * | 1976-02-18 | 1978-08-29 | Tektronix, Inc. | Cathode ray tube storage target having increase life |
US4284661A (en) * | 1976-08-02 | 1981-08-18 | Tektronix, Inc. | Process for making bistable storage cathode ray tube |
US4159439A (en) * | 1976-08-02 | 1979-06-26 | Tektronix, Inc. | Bistable storage cathode ray tube |
US4130775A (en) * | 1977-01-17 | 1978-12-19 | Tektronix, Inc. | Charge image charge transfer cathode ray tube having a scan expansion electron lens system and collimation electrode means |
US4142128A (en) * | 1977-04-18 | 1979-02-27 | Tektronix, Inc. | Box-shaped scan expansion lens for cathode ray tube |
US4335328A (en) * | 1979-05-24 | 1982-06-15 | Tektronix, Inc. | Selectively erasable storage target with insulated web collector |
US4254360A (en) * | 1980-04-08 | 1981-03-03 | Tektronix, Inc. | Insulated web collector storage target for a cathode ray tube |
US4801850A (en) * | 1987-07-28 | 1989-01-31 | Xerox Corporation | High brightness vacuum fluorescent display (VFD) devices |
US6979947B2 (en) * | 2002-07-09 | 2005-12-27 | Si Diamond Technology, Inc. | Nanotriode utilizing carbon nanotubes and fibers |
US20080012461A1 (en) * | 2004-11-09 | 2008-01-17 | Nano-Proprietary, Inc. | Carbon nanotube cold cathode |
Also Published As
Publication number | Publication date |
---|---|
GB1306761A (en) | 1973-02-14 |
JPS534394B1 (de) | 1978-02-16 |
DE2129909C2 (de) | 1986-08-28 |
NL7108308A (de) | 1971-12-21 |
DE2129909A1 (de) | 1972-01-27 |
CA949681A (en) | 1974-06-18 |
FR2097926A5 (de) | 1972-03-03 |
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