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    • 2. 发明专利
    • PT78091B
    • 1986-03-20
    • PT7809184
    • 1984-02-10
    • PHILIPS NV
    • H01J29/76H01J3/28H04N9/18
    • An electromagnetic deflection unit for a television display tube has two deflection coils disposed coaxially one within the other and each comprising two diametrically opposed coil units. Each deflection coil is wound against a surface of an associated hollow moulding, which in the case of the inner coil may be the envelope of the display tube. The respective surface of each moulding has a compound curvature which is concave in one direction and convex in a direction transverse thereto. Each coil unit of each deflection coil comprises a number of turns of wire which are laid around each other in a single layer or a plurality of superimposed layers on the respective surface of the respective moulding, the wire turns being held in position by contact adhesive applied to the wire and to the surface of the moulding.
    • 4. 发明专利
    • TRAVELING WAVE PUSH-PULL ELECTRON BEAM DEFLECTOR
    • GB8325481D0
    • 1983-10-26
    • GB8325481
    • 1983-09-23
    • TEKTRONIX INC
    • H01J29/74H01J23/24H01J29/70H01J3/28
    • An electron beam deflection structure (10) of the traveling wave type includes first and second deflection members (52 and 58) positioned on opposite sides of and extending along the path of an electron beam (26) to deflect the beam in response to deflection signals applied to the deflection members. In a preferred embodiment, both deflection members are of a meander line type which include a plurality of deflection plate segments (74, 76) connected in series by a plurality of lead portions (78) to form a pair of transmission lines, each transmission line having a characteristic impedance that tends to vary with distance along the path of the electron beam due to a flared spacing between the output portions of the deflection members. Pitch compensation including different pitches for the first and second deflection members increases and maintains substantially uniform the characteristic impedance of each transmission line to prevent reflection of the deflection signal back toward the input end of the line.
    • 5. 发明专利
    • DEVICES FOR INCREASING THE ACCURACY OF ADDRESSING AN ELECTRN BEAM STRIKING A TARGET
    • GB1396209A
    • 1975-06-04
    • GB1944873
    • 1973-04-24
    • THOMSON CSF
    • G21K1/087G09G1/04H01J29/70H01J37/147H01J37/304H01J37/305H05H7/00H01J3/28G05D3/00
    • 1396209 Automatic control of position THOMSON-CSF 24 April 1973 [25 April 1972] 19448/73 Heading G3N [Also in Division H1] In a discharge tube arrangement which includes a deflection system 10 for controlling the point of impact of an electron beam 50 on a target 1, the accuracy of addressing the beam is increased by the provision of a subsidiary, small amplitude deflection system 9 which may be switched into a servo-circuit Fig. 6, (not shown) fed by signals derived from a pair of orthogonal elements 41, 42 provided with scale marks formed of a material having electron impact properties different from those of the remainder of the element surface. The arrangement may be calibrated, to store the system 9 correcting voltages required to be added to the initial system 10 voltages in order to address any given point of the target, by employing a standard grid as the target, Fig. 5: the accuracy of the main deflection system 10 permits deflection of the beam to the vicinity of that grid point Q o which is associated with the grid square containing the desired point of impact P. Deflection system 9 is then switched into the servo-circuit to accurately position the beam on the edges of the two scale marks defining Q o . The deflection system 9 is then disconnected from the servo-circuit and deflection voltages applied to system 9 to displace the beam to the desired point P.
    • 6. 发明专利
    • PT78152B
    • 1986-03-20
    • PT7815284
    • 1984-02-24
    • PHILIPS NV
    • H01J29/70H01J29/76H01J3/28H04N9/18
    • An electromagnetic deflection unit is disposed around a portion of a display tube and comprises a first deflection coil for producing, when energized, a frame deflection field and a second deflection coil for producing, when energized, a line deflection field the second deflection coil and being located coaxially within the first deflection coil, each deflection coil having two diametrically oppositely located deflection coil units. The first deflection coil has a winding distribution for generating, upon energization, a dipole deflection field in combination with a positive sixpole deflection field on the side of the gun system, generating a dipole field in combination with a negative sixpole field in the central area, and generating a dipole field in combination with a positive sixpole on the side facing the display screen, the first and the second deflection coils being positioned axially with respect to each other in such manner that upon energization the magnetic field generated by the first deflection coil extends further towards the display screen than the magnetic field generated by the second deflection coil so that the device shows a minimum east-west raster error.
    • 7. 发明专利
    • DE3339015A1
    • 1984-05-03
    • DE3339015
    • 1983-10-27
    • TEKTRONIX INC
    • CORRELL RONALD E
    • H01J29/74H01J23/24H01J29/70H01J3/28H01J29/72G01R13/20
    • An electron beam deflection structure (10) of the traveling wave type includes first and second deflection members (52 and 58) positioned on opposite sides of and extending along the path of an electron beam (26) to deflect the beam in response to deflection signals applied to the deflection members. In a preferred embodiment, both deflection members are of a meander line type which include a plurality of deflection plate segments (74, 76) connected in series by a plurality of lead portions (78) to form a pair of transmission lines, each transmission line having a characteristic impedance that tends to vary with distance along the path of the electron beam due to a flared spacing between the output portions of the deflection members. Pitch compensation including different pitches for the first and second deflection members increases and maintains substantially uniform the characteristic impedance of each transmission line to prevent reflection of the deflection signal back toward the input end of the line.