CN1032562C - High-resolution colour kinescope - Google Patents

Abstract

The present invention relates to a novel high-resolution color picture tube which is a magnetic deflection color picture tube. The present invention is composed of a glass shell, an electric gun and magnetic deflection coils, and is characterized in that the magnetic deflection coils are placed in the neck of the glass shell, and the three magnetic deflection coils are correspondingly connected with three electric beams to form a whole, i.e., an inner magnetic deflection structure. The structure can be combined with a penetration type fluorescent screen to form a three-gun inner deflection penetration type color picture tube, and can also be combined with a shadow mask type fluorescent screen to form a three-gun inner deflection shadow mask type color picture tube. The present invention is favorable to improve the resolution of the color picture tube, and has the advantages of tubing technology simplification, reliability improvement, etc.

Description

High-resolution colour picture tube

The present invention is a kind of magnetic deflection color picture tube of new structure, belongs to the picture tube technical field.

Existing magnetic deflection color picture tube is made up of glass bulb, shadow mask electron gun and deflecting coil usually, and its deflecting coil is placed on the neck of glass bulb outside.The most frequently used structure is the shadow mask picture tube, and this structure is owing to be subjected to the restriction that shadow mask hole can not be too small, thereby has influenced the further raising of resolution.In order to improve resolution, the scheme that two kinds of cancellation shadow masks were once arranged, a kind of scheme claims to restraint index type color picture tube (Schwartg.J.W. " BeamIndax TubeTechnology " Proceedings SID20, NO.2:45～53,1979), this scheme, circuit complicated fail higher owing to cost is used widely; Another kind of scheme claims penetration colour picture tube (Galves, J.P. " Multicolor and Multipersistence Pene-tration Screens " Proceedings SID20, NO.22:95～103,1979), this scheme does not reach a standard as yet owing to the high-frequency and high-voltage modulation element, and three the rifle penetration colour picture tube on business can't make three electron beams on whole panel, realize assembling with the outer magnetic deflection coil of a pipe, so penetration colour picture tube does not obtain popularization yet.

The objective of the invention is at the deficiencies in the prior art, a kind of magnetic deflection color picture tube that helps improving the new structure of resolution is provided, it is compared with existing shadow mask tube, have simple in structure, with low cost, improve resolution and be not subjected to advantages such as shadow mask restriction, and be easy to suitability for industrialized production.

Magnetic deflection color picture tube of the present invention is made up of glass bulb, electron gun and magnetic deflection coil, characteristics are the neck inside that magnetic deflection coil is placed on picture tube glass bulb, each electron gun of three electron guns all is connected with a magnetic deflection coil and constitutes an integral body, the i.e. color picture tube of inner magnetic deflection structure.The arrangement of three electron guns can be a triangular structure, also can be the in-line structure.This structure can with the penetration phosphor screen composition three-gun bias internal transmissive tricolor tube that combines, also can with the shadow mask screen composition three-gun bias internal shots shadow mask tricolor tube that combines.It is two separate parts that interior magnetic deflection coil can adopt horizontal deflection and vertical deflection, and two parts are placed on along on two positions of tube axial direction.For the magnetic field that makes two parts does not interact, can accompany a slice magnetic screen sheet between two parts, also can adopt the interior magnetic deflection coil of other frame mode.In order to improve picture tube insulation property and vacuum performance, the coil that interior magnetic deflection coil can adopt high-temperature resistant enamelled wire to constitute, also can adopt the coil that the coating conducting shell forms through high temperature sintering on the screwed pipe shape ceramic tubular, can also adopt the coil of other ceramic metallization structure.

The present invention helps improving resolution owing to adopt inner magnetic deflection structure.The inner deflecting coil inductance value is little, helps the high frequency sweep mode, and the magnetic deflection field that inner deflecting coil produces is distributed with to be beneficial to improves deflection aberration, thereby improves resolution, the particularly resolution at phosphor screen corner place.In addition, inner deflecting coil can make the restriction that the increase of neck diameter is not increased by deflection power.Thereby the electron gun diameter can increase, and reduces spherical aberration and improves resolution.Adopt three rifle intrinsic deflection structures to combine, help realizing that the electron beam of three different-energies assembles on whole phosphor screen with the penetration phosphor screen; Adopt three rifle intrinsic deflection structures to combine, have advantages such as the tube-making process of simplification and raising reliability with shadow mask screen.

Fig. 1 is the three-gun bias internal transmissive tricolor tube structural representation; Fig. 2 is the three-gun bias internal shots shadow mask tricolor tube structural representation.

The present invention can adopt following embodiment to realize:

Adopt structure as shown in Figure 1, make three-gun bias internal transmissive tricolor tube, there is the fluorescent powder coated layer of penetration (2) inboard of glass bulb (1), overlay can be mixed and made into by a certain percentage by red green, blue three kinds of penetration fluorescent material, also can adopt layering or other method to make, this layer is subjected to low energy, middle energy and high-power electron beam to excite the light that sends the red, green, blue look respectively.Aluminium lamination (3) on the overlay (2) is connected with the graphite layer (4) that the glass awl applies above.Each magnetic deflection arrangement in three interior magnetic deflection arrangement (5), (6), (7) all has can make the coil of electron beam in level and vertical direction deflection, (8), (9), (10) are respectively corresponding three electron guns that excite red, green, blue three looks, anode (11) be connected with graphite layer (4) with aluminium lamination (3) and with the anode common point of three electron guns (8), (9), (10) under a high potential, 12KV for example.The current potential of the negative electrode of three electron guns (12), (13), (14) has nothing in common with each other, for example divide be in addition 6KV, OV ,-6KV, make three electron beams arrive phosphor screen overlays (2) and divide the energy that has in addition under 18KV, 12KV, the 6KV, thereby inspire indigo plant, green, red light respectively.When three electron beams are worked simultaneously, because energy has nothing in common with each other, also having nothing in common with each other by the amount of deflection behind three interior magnetic deflection arrangement (5), (6), (7), the amount of deflection of low-energy electron beam is big, the amount of deflection of high-power electron beam is little, can adopt the method for the coil number of ampere turns that reduces the arrangement for deflecting by low-energy electron beam, just the amount of deflection of three different-energy electron beams is identical, suitably applies correction current signal three electron beams are assembled on whole phosphor screen.

Adopt structure as shown in Figure 2, make three-gun bias internal shots shadow mask tricolor tube, (15) are glass bulb among the figure; (16) be the fluorescent powder coated layer of the shadow mask type colour tube of routine, it is one group of sequence arrangement by red, green, blue, black matrix.(17) for applying the aluminium lamination on phosphor powder layer; (18) be shadow mask; The coated graphite conductive layer (19) of glass awl is connected with aluminium lamination (17).In interior magnetic deflection arrangement (20), (21) and (22) each all has makes the coil of electron beam in level and vertical direction deflection, anode (23) links to each other with anode cap (30), and anode potential is the maximum potential of pipe, and (24) are focusing electrode, (25) be intensifying ring, (26) are Wehnelt electrode.The negative electrode (27) of three electron beams of emission, (28), (29) branch are applied in the signal voltage that excites red, green, blue coloured light in addition, and three electron beams have identical ceiling voltage energy.When three electron beams are worked simultaneously, applied correcting current in addition in last minute in interior magnetic deflection arrangement (20), (21), (22) three electron beams are assembled on the hole of shadow mask (18), so that guarantee colour purity.Because the magnetic deflection field zone of interior magnetic deflection arrangement is shorter, deflection defocusing is little, and inductance value is less, thereby is applicable to the occasion that deflection frequency is higher, and it is higher than the resolution of existing shadow mask type colour tube, and designs simplification.

Claims (5)

1, a kind of high-resolution colour picture tube, form by glass bulb, electron gun and magnetic deflection coil, it is characterized in that magnetic deflection coil is placed on the neck inside of glass bulb, each electron gun of three electron guns all is connected with a magnetic deflection coil and constitutes the integral body of an intrinsic deflection structure, magnetic deflection coil adopts horizontal deflection and two separate parts of vertical deflection, and with two parts be placed on tubular axis to two positions on, a slice magnetic screen sheet is arranged between two parts.

2, high-resolution colour picture tube according to claim 1, what it is characterized in that three electron guns is arranged as triangular structure or in-line structure.

3, high-resolution colour picture tube according to claim 1 and 2 is characterized in that it combines formation three rifle intrinsic deflection penetration colour picture tubes with the penetration phosphor screen.

4, high-resolution colour picture tube according to claim 1 and 2 is characterized in that it combines formation three rifle intrinsic deflection shadow mask type colour tubes with shadow mask screen.

5, high-resolution colour picture tube according to claim 1 and 2 is characterized in that magnetic deflection coil adopts high-temperature resistant enamelled wire to constitute, and adopts perhaps that coated conductive layer constitutes through high temperature sintering on the screwed pipe shape earthenware.