CN85104466A - Adopt the color picture tube of rescinded angle shadow mask frame - Google Patents

Abstract

The improvement of color picture tube comprises the shell of finding time, and shell has the rectangular screen assembly of a major axis and minor axis, and picture tube center longitudinal axis Z-Z is vertical with minor axis with major axis by the center of screen assembly.Screen assembly comprises one at many somes place, is included in spoting weld on the angle and is installed in planar mask on wherein the peripheral frame.The improvement of picture tube includes the framework of rescinded angle, and first flange of each frame corners is that straight, flat reaching acutangulates corresponding to major axis and minor axis.The shape of the peripheral part of planar mask and first flange is consistent and can stretch therein.Planar mask is linked fillet on the framework, is the straight and flat part center that is positioned at rescinded angle approx.

Description

Adopt the color picture tube that carries the angle shadow mask frame

The present invention relates to a kind of planar mask and be fixed on the color picture tube that is hanging on the fluoroscopic peripheral frame of cathode electronics photoluminescence, specifically, the present invention relates to a kind of novel shadow mask-frame assembled form, it helps to reduce the bulbous protrusions of planar mask in the picture tube course of work.

In these color picture tubes, beat the accuracy that accuracy at the cathode electronics photoluminescence phosphor screen area of each unit depends on that to a great extent the phosphor screen area in hole, planar mask hurdle and unit aligns in the picture tube course of work by electron gun electrons emitted bundle.In the incipient stage of picture tube work, because of the bump of electron beam makes the heated speed of planar mask faster compared with heavier peripheral frame.Because this difference of being heated, the speed of expansion of planar mask is faster than framework.Because the periphery of planar mask is to be welded on the framework, the expansion more rapidly of this planar mask can cause that framework stops the expansion of planar mask, thereby cause the planar mask globulate to be swelled, this planar mask globulate protuberance can cause by its electron beam and can not beat exactly on the phosphor screen area of the unit that is associated with them, thereby causes occurring on the phosphor screen undesirable colored deviation.

Several previous patents have addressed the problem of this globulate protuberance.Point out in the U.S. Patent No. 3368098 that on February 6th, 1963 was authorized moral rice (Demmy), use the shadow mask-framework of limited quantity to weld the barrel distortion of eliminating or reducing planar mask between the temperature rise phase of picture tube work.The U.S. Patent No. 3585431 of authorizing bright (LOng) on June 15th, 1971 discloses the form of a kind of cutting shadow mask shirt rim, wherein, shadow mask is to be welded in like this on the framework, makes to allow that in the process that picture tube warms up planar mask leaves the radial motion on frame perimeter surface.Authorize people (Ishizuka et al such as Shi Jie on January 21st, 1975.) US Patent No 3862448 point out, use the bulk buffer strip reduce to reduce because of the stress on the caused planar mask of heating planar mask in the shadow mask shirt rim.The U.S. Patent No. 4099086 of authorizing people (Roder et al.) such as Luo Deer on July 4th, 1978 discloses a kind of shadow mask shirt rim, near the angle of planar mask, the jagged angle of departure tongue piece that limits.This tongue piece is curved, and is soldered on the shadow mask frame, in one embodiment, tongue piece so groove is arranged or gauffer so that a kind of effect of hinge to be provided.

Though all these have patent to solve and the relevant particular problem of they applied picture tube casts earlier, nearest picture tube design then requires to find out other way and solves because of the planar mask caused problem that expands.One of picture tube design that these are nearest has been used a kind of more flat, more exactly, is a kind of rectangle planar mask.

According to the present invention, in color picture tube, done a kind of improvement, this picture tube comprises a shell of finding time that the rectangular screen assembly of long and short axle is arranged, wherein, one of picture tube perpendicular to the center longitudinal axis of this major axis and the minor axis center by panel.This screen assembly comprises a planar mask, and this planar mask is at many somes place, comprises the point on its angle, welds together with the peripheral frame that is installed in wherein.This framework comprises a flange that is parallel to center longitudinal axis approx.This planar mask comprises a shirt rim on every side that is parallel to center longitudinal axis approx.The improvement of picture tube comprises the planar mask that rescinded angle is arranged, and wherein, the shirt rim part on the angle is straight, flat and acutangulates corresponding to major axis and minor axis, and in the approximate center of straight and flat shirt rim part planar mask is soldered on the framework.

In a preferred embodiment, framework has rescinded angle, and wherein, the flange on the angle of each framework is that straight, flat reaching acutangulates corresponding to major axis and minor axis.The peripheral part of planar mask is consistent with the shape of flange, and can be flexible relatively.The welded corner joint that planar mask is contained on the framework is the center that is positioned at the straight and flat part of rescinded angle approx.

In the accompanying drawings:

Fig. 1 is the plane graph according to hole, hurdle of the present invention shadow mask type cathode ray tube axial cross section;

Fig. 2 is the panel of cathode ray tube of Fig. 1 and the rearview of shadow mask-frame assembly;

Fig. 3 is the corner portions located plane graph that the part of the shadow mask-frame assembly of a prior art has been removed;

Fig. 4 is the sectional view of the corner portions located removed of the part of the shadow mask-frame assembly of cathode ray tube shown in Figure 1;

Fig. 5 is the sectional view of the corner portions located of the shadow mask-frame assembly that obtains from the 5-5 of Fig. 4 line;

Fig. 6 is one jiao a vertical view of frame for cathode ray tube shown in Figure 1;

Fig. 7 is the corner portions located plane graph of having removed according to the part of another shadow mask-frame assembly of the present invention;

Fig. 8 has removed the corner portions located plane graph according to the part of another shadow mask-frame assembly of the present invention.

Fig. 1 and Fig. 2 have shown a kind of color picture tube 18, and its glass shell of finding time 20 comprises a rectangular screen assembly 22 and neck 24, and connect both with funnel portion 26.Screen assembly comprises two normal axis: be parallel to it than the major axis X-X of broadside (normally level) and be parallel to the minor axis Y-Y of its narrow side (normally vertical).Major axis and minor axis are perpendicular to the longitudinal axis Z-Z by neck 24 and screen assembly 22 centers.Screen assembly 22 by look see panel 28 and solid limit flange in other words limit wall 30 constitute, this limit wall is bored 26 sealing-ins mutually with glass material 27 with pipe.Three look cathode electronics photoluminescence linear fluorescents screen 32 is positioned at the inner surface of panel 28.Phosphor screen 32 is made up of the fluorescent material lines that a row is arranged essentially parallel to picture tube minor axis Y-Y extension.The mass part of phosphor screen 32 can have a light absorbent by mode known in the prior art is topped.Hole, novel hurdle colour selection electrode planar mask 34 in other words is added on the novel L type framework 35 and constitutes planar mask-hurdle aperture member 33, this assembly 33 is by four springs 42, be installed in movably within the assembly 22, assembly 33 has a predetermined each interval relation with respect to phosphor screen 32.Planar mask 34 comprises hole, many slot shape hurdles, and there is the separately brace of slot in these holes, hurdle to be that the mode of parallel columns is alignd basically in each row.L shaped framework 35 comprises two flanges 36 and 37.First flange 36 extends and parallels with center longitudinal axis Z-Z approx to phosphor screen 32.Second flange 37 extends internally and approx perpendicular to center longitudinal axis Z-Z.Planar mask 34 also comprises one with respect to frame edge 36 telescopic shirt rims 41.

An in-line gun 39(is illustrated) be installed in the neck 24 to produce and to guide three electron beams 38,38R and 38G to assemble path, by planar mask 34 arrival phosphor screens 32 along coplane.

Design picture tube 18 uses itself and outside magnetic deflection coil 40 together, and coil 40 is around neck 24 and funnel portion 26, and close the two joint.When suitable voltage was added on the deflecting coil 40, three electron beam 38B, 38R and 38G were subjected to the effect of quadrature field and scan out rectangular raster on phosphor screens 32.

Fig. 3 shown a kind of prior art shadow mask-frame assembly 33 ' corner portions located, this assembly comprise be fixed on peripheral frame 35 ' on hole, hurdle planar mask 34 '.Shadow mask 34 ' and framework 35 ' the angle be round, and planar mask 34 ' point 44 places on the angle be soldered to framework 35 ' on.Because planar mask 34 ' crooked on the angle, planar mask 34 ' be relatively firm on the angle, almost there is not any flexibility.Embodiment of the present invention provide than the bigger corner flexibility of this class prior art structure not to be needed with resembling some the needed otch of other prior art structure and contact pin.

Fig. 4,5 and 6 has shown the details of the novel shadow mask plate-frame assembly 33 in the picture tube 18.The prior art assembly 33 of this novel shadow mask plate-frame assembly 33 and Fig. 3 ' main marked difference be that the former edge is more straight and the angle is clipped.On frame corners, first flange 36 of framework 35 is that straight, flat reaching acutangulates with respect to major axis X-X and minor axis Y-Y.The shape of the peripheral part of planar mask 34 and first flange 36 is consistent and can stretch on flange.The shirt rim 41 of each acutangulate corner portions located of planar mask 34 is welded on the rescinded angle of framework 35 at point 46 places, and point 46 is the centers that are positioned at straight and flat frame corners approx.Solder joint also allows maximum radial compliance near the far-end of shirt rim 41.

The prior art shadow mask-frame assembly 33 of Fig. 3 ' in, around the corner and be in a little a bit strict with respect to the status requirement of the solder joint 44 of the far-end of planar mask.Slight variation by predetermined design attitude just can be heaved the big influence of generation to the expansion and the globulate of planar mask.Yet in planar mask-frame assembly 33 of advanced person, the position of the solder joint 46 on rescinded angle is not to require harshness so, thereby has reduced because of planar mask and be soldered to difference between the caused picture tube of variation on the framework.This advantage is because the straight flat part in the shadow mask shirt rim 41 of rescinded angle has big flexibility to cause.This flexibility also causes the opposing of planar mask expansion less, thereby the sphere of planar mask is heaved less.

Can change because of the change of the straight flat partial-length A in corner in the flexibility of the planar mask shirt rim at rescinded angle place.Short length A will cause less flexibility, and long length A will cause bigger flexibility.In some application scenario, clipping of planar mask-frame assembly angle can cause undesirable shadow mask microphone effect because of the flexibility of planar mask.This microphone effect can be as indicated in Fig. 7, to the correction of the rescinded angle of planar mask-frame assembly 48 and controlled.Planar mask-frame assembly 48 comprises the planar mask 50 that is connected to L shaped peripheral frame 52.Each angle of planar mask-frame assembly 48 comprises that three become the whole flat section 54,56 and 58 of adjacent straight, and all parts acutangulate corresponding to major axis and minor axis.Planar mask 50 is put 60 places at the approximate center of central segment 56 and is soldered on the framework 52.By length or the angle that suitably changes these sections, distinctive microphone effect problem can be controlled.

Though show, planar mask is flexible on framework in above-mentioned planar mask-frame assembly 33, also can be at planar mask-frame assembly 33 " in use rescinded angle, as shown in Figure 8, in this assembly, stretch within the planar mask 34 " being " at framework 35.At assembly 33 " in, planar mask 34 " size be slightly less than framework 35 " like this, exists gap 62 between planar mask 34 " and framework 35 ".Gap 62 is used for reserving the place for the expansion of planar mask.Planar mask 34 " is linked framework 35 " and is realized by cutting on the planar mask shirt rim or projection 64, and projection stretches out and " contacts with framework 35.On the other hand, framework can have inside extension so that and contacted contact pin of planar mask or projection.

Claims (2)

1, a kind of color picture tube of the shell of finding time of the rectangular screen assembly that includes major axis and minor axis, center and major axis and the minor axis of the center longitudinal axis of said picture tube by above-mentioned screen assembly is perpendicular, said screen assembly comprises one at many somes place, comprise the point on its angle, be soldered to the planar mask on the peripheral frame that is installed in wherein, said framework has a flange that is roughly parallel to center longitudinal axis, and said planar mask has a shirt rim that is roughly parallel to center longitudinal axis, it is characterized in that, said planar mask (34) (50) (34 ") have rescinded angle; it is straight making in the shirt rim in corner part (41); flat; and corresponding to major axis (X-X) and minor axis (Y-Y) both acutangulate, and locate to be soldered to said framework (35) (52) (on 35 ") at the approximate center (46) (60) of straight and flat shirt rim part.

2, a kind of color picture tube that has comprised the shell of finding time that the rectangular screen of major axis and minor axis assembly is arranged, center and major axis and the minor axis of the center longitudinal axis of said picture tube by said screen assembly is perpendicular, said screen assembly comprises one at many somes place, comprise the point on its angle, be soldered to the planar mask on the peripheral frame that is installed in wherein, and said framework has an approximate flange that is parallel to center longitudinal axis, it is characterized in that, (35 ") have rescinded angle; it is straight making said flange (36) on each frame corners have a part (41) (56) at least; flat and acutangulate corresponding to major axis (X-X) and minor axis (Y-Y); and the peripheral part (41) of said planar mask (34) is consistent with the shape of said flange and be telescopic with respect to flange, and the welded corner joint that said planar mask is connected on the said framework is that at least one section straight center (46) (60) that reaches flat part that is positioned at rescinded angle approx located at said framework (35) (52).

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