EP0044585A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Deflection device for a colour display tube and colour display tube having such a deflection device
Assignee: Koninklijke Philips NV
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Filing: 1981-07-03
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Granted: —
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Expires: 2001-07-03
Abstract
Abstract In a television deflection device which is mounted on a colour cathode ray tube a frustro-conical supporting member (3) has a pair of coil halves (6) and (7) which form horizontal deflection coils. These coils have longitudinal portions (11, 12, 14) and (15) which extend to the front and the rear of the supporting member (3), an elongate tapered spacer (17) and (18) being inserted in the spacers between adjacent longitudinal portions of these coils. Movements of the spacers (17) and (18) adjusts the space between the longitudinal portions and which provides mechanical means for correcting for asymmetries in the display device.
Inventors
- 👤 Adrianus Martinus Habraken
- 👤 Nicolaas Gerrit Vink
- 👤 Adriaan Jacob Groothoff
- 👤 Marcellis Hendrikus J. Driessen
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 08:27
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/82; H01J29/823; H01J29/826; H01J29/70; H01J29/72; H01J29/76; H01J29/762
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
226 words
A colour display tube having three electron guns which are positioned in one plane for projecting three electron beams towards a display screen, and having a deflection device which is mounted on the display tube, said deflection device having a substantially frust-conical supporting member with a front end facing said display screen having a large diameter and a rear end facing said electron guns having a relatively small diameter, which member supports a first set of deflection coils arranged about the longitudinal axis of said tube deflecting the three electron beams in a first direction, and a second set of deflection coils arranged about said axis for deflecting the three electron beams in a second direction orthogonal to said first direction, the first set comprising two coils one of which is provided opposite to and spaced from the other in the supporting member with each coil being formed by two longitudinal parts extending substantially parallel to the said axis and being connected at their respective front and rear ends by transverse parts, characterized in that adjusting means cooperating with the longitudinal parts of the coils of the first set are provided so as to vary the distances between the adjoining longitudinal parts at least at one end of the supporting member, and pressure means for keeping the said longitudinal parts in contact with the adjusting means.
Claim 2
Dependent Claim
226 words
A colour display tube having three electron guns which are positioned in one plane for projecting three electron beams towards a display screen, and having a deflection device which is mounted on the display tube, said deflection device having a substantially frust-conical supporting member with a front end facing said display screen having a large diameter and a rear end facing said electron guns having a relatively small diameter, which member supports a first set of deflection coils arranged about the longitudinal axis of said tube deflecting the three electron beams in a first direction, and a second set of deflection coils arranged about said axis for deflecting the three electron beams in a second direction orthogonal to said first direction, the first set comprising two coils one of which is provided opposite to and spaced from the other in the supporting member with each coil being formed by two longitudinal parts extending substantially parallel to the said axis and being connected at their respective front and rear ends by transverse parts, characterized in that adjusting means cooperating with the longitudinal parts of the coils of the first set are provided so as to vary the distances between the adjoining longitudinal parts at least at one end of the supporting member, and pressure means for keeping the said longitudinal parts in contact with the adjusting means.
Claim 3
Dependent Claim
37 words
A colour display tube as claimed in Claim 1, characterized in that the two coils of the first set of deflection coils are positioned symmetrically relative to the plane in which the three electron guns are positioned.
Claim 4
Dependent Claim
49 words
A colour display tube as claimed in Claim 1 or 2, characterized in that the front end of the supporting member has a lip and the pressure means'consists of two resilient elements placed diametrically opposite to each other between the lip and the front transverse parts of the coils.
Claim 5
Dependent Claim
42 words
A colour display tube as claimed in Claim 1, 2 or 3 characterized in that the adjusting means comprises two wedge-shaped spacers each of which is movable in the longitudinal direction of the respective spaces formed between the said adjoining longitudinal parts.
Claim 6
Dependent Claim
39 words
A colour display tube as claimed in Claim 4, characterized in that the dimension of each spacer is in the form of an elongate member which tapers from the front end to the rear end of the supporting member.
Claim 7
Dependent Claim
27 words
A colour display tube as claimed in Claim 4 or 5, characterized in that the spacers can be operated from the front end of the supporting member.
Claim 8
Dependent Claim
61 words
A colour display tube as claimed in Claim 3, characterized in that near the rear side of the support member are located thereon between the two coils of said first set of deflection coils fixed spacers having a width at least equal to the smallest width of the adjusting means but not larger than the greatest width of said ajusting means.
Claim 9
Dependent Claim
40 words
A colour display tube as claimed in Claim 1 or 2, characterized in that the adjusting means comprises two eccentrics which are rotatable about axes and which are respectively positioned in the spaces formed between the said adjoining longitudinal parts.
Claim 10
Dependent Claim
91 words
A colour display tube as claimed in Claim 1, characterized in that the adjusting means comprises four cams movable in the front of the supporting member and each cooperating with an internal surface of one of the corners formed between a longitudinal part and a front transverse part, in which, for increasing the distance between a first set of two oppositely located longitudinal parts and simultaneously decreasing the distance between the other set of oppositely located longitudinal parts, the cams cooperating with the first set can be moved apart, and conversely.
Claim 11
Dependent Claim
196 words
A deflection device for a colour display tube having three electron guns positioned in one plane, said device comprising a substantially frusto-conical supporting member with a front end with a large diameter and a rear end with a relatively small diameter, which member supports a first set of deflection coils arranged about its longitudinal axis for generating a magnetic deflection field in a first direction and a second set of deflection coils arranged about said axis for generating a magnetic deflection field in a second direction orthogonal to said first direction, the first set comprising two coils one of which is provided opposite to and spaced from the other in the supporting member with each coil being formed by two longitudinal parts extending substantially parallel to the said axis and being connected at their respective front and rear ends by transverse parts, characterized in that adjusting means cooperating with the longitudinal parts of the coils of the first set are provided so as to vary the distances between the adjoining longitudinal parts at least at one end of the supporting member, and pressure means for keeping the said longitudinal parts in contact with the adjusting means.
Claim 12
Dependent Claim
196 words
A deflection device for a colour display tube having three electron guns positioned in one plane, said device comprising a substantially frusto-conical supporting member with a front end with a large diameter and a rear end with a relatively small diameter, which member supports a first set of deflection coils arranged about its longitudinal axis for generating a magnetic deflection field in a first direction and a second set of deflection coils arranged about said axis for generating a magnetic deflection field in a second direction orthogonal to said first direction, the first set comprising two coils one of which is provided opposite to and spaced from the other in the supporting member with each coil being formed by two longitudinal parts extending substantially parallel to the said axis and being connected at their respective front and rear ends by transverse parts, characterized in that adjusting means cooperating with the longitudinal parts of the coils of the first set are provided so as to vary the distances between the adjoining longitudinal parts at least at one end of the supporting member, and pressure means for keeping the said longitudinal parts in contact with the adjusting means.
Claim 13
Dependent Claim
35 words
A deflection yoke as claimed in Claim 10, characterized in that the two coils of the first set of deflection coils are symmetrical relative to the plane in which the three electron guns are positioned.
Claim 14
Dependent Claim
50 words
A deflection yoke as claimed in Claim 10 or 11, characterized in that the front end of the supporting member has a lip and that the pressure means consists of two resilient elements placed diametrically opposite to each other between the lip and the front transverse parts of the coils.
Claim 15
Dependent Claim
41 words
A deflection yoke as claimed in Claim 10, 11 or 12, characterized in that the adjusting means comprises two wedge-shaped spacers each of which is movable in the longitudinal direction of the respective slots formed between the said adjoining longitudinal parts.
Claim 16
Dependent Claim
37 words
A deflection yoke as claimed in Claim 10, characterized in that the adjusting means comprises two eccentrics which are rotatable about axes and which are respectively positioned in the spaces formed between the said adjoining longitudinal parts.
Claim 17
Dependent Claim
90 words
A deflection yoke as claimed in Claim 10, characterized in that the deflection means comprises four cams movable in the front of the supporting member and each cooperating with an internal surface of one of the corners formed between a longitudinal part and a front transverse part in which, for increasing the distance between a first set of two oppositely located longitudinal parts and simultaneously decreasing the distance between the other set of oppositely located longitudinal parts, the cams cooperating with the first set can be moved apart, and conversely.
Claim 18
Dependent Claim
73 words
A deflection device as claimed in Claim 19, characterized in that the supporting member at least at one end is divided into two parts along the plane in which the non-deflected electron beams extend, a coil of the first set of coils being provided on each of said parts and that the adjusting means comprise two eccentrics with which the two parts of the supporting member can be moved relative to each other.
Claim 19
Dependent Claim
58 words
A deflection device as claimed in Claim 10, characterized in that each axial part of the coils of the first set of coils is connected to another partially cut-out part of the supporting member and that every two oppositely located cut-out parts are movable relative to each other by means of an eccentric journalled on the supporting member.
References Cited (Backward Citations)
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