CN1044190A - Color picture tube - Google Patents

Abstract

Color picture tube comprises the electron gun and the horizontal phosphor screen of three primary colors fluorescent powder bar of the three electron-beam that can produce the in-line arrangement, the plane, place was with vertical through the horizontal line of phosphor screen mid point when three electron-beam was static, and three electricity bundles carry out line scanning along the phosphor strip direction.Can save shadow mask, aperture plate, reduce power consumption and cost, and can promote clearness and the sense of reality of picture.

Description

Color picture tube

Present colorful visualization is broadly divided into shadow mask tube, penetration pipe and bundle guide formula pipe by structure, uses to such an extent that be shadow mask tube the most widely.Penetration pipe and bundle guide formula pipe have all saved shadow mask, but and improved the definition phosphor screen and made complicatedly, peripheral accessory circuit is also complicated, and some electro-optical properties does not have yet and significantly improves, and therefore, their use occasion is very limited.

Though auto-convergence shadow mask tube early three rifle three beams shadow mask tubes and single rifle three beams aperture plate pipe on performance is superior, still has many shortcomings, will absorb about 80% electronics as shadow mask, not only power consumption is big, and shadow mask easily generates heat, and also can produce scattered electron; The radius of curvature difference of electronics from the deflection center to the phosphor screen and between shadow mask can not be eliminated convergence errors; Can be clear that optical grating construction on the auto-convergence tube fluorescent screen picture.The definition and the sense of reality have been influenced; Also have the pipe cost high in addition.

Color picture tube of the present invention is a kind of new type colorful picture tube.It is characterized in that its electron gun is the three electricity bundle vertical arrangements that vertical arrangement or electron gun produce.It is horizontal that the three primary colors fluorescent powder bar is pressed the order of R, G, B or R, B, G from top to bottom.Three electron-beam scans along the direction of phosphor strip.The advantage of the pipe that this ranking method is made is:

At first can save shadow mask.So not only can reduce power consumption greatly.Also can eliminate the convergence errors that produces by shadow mask.Bonding jumper width on the shadow mask is roughly 4: 1 with the ratio of slit-widths, so the electron penetration rate of planar mask is about 20%, has about 80% electronics to consume in vain, and makes the shadow mask heating.Save shadow mask, under same brightness, can reduce line about 80%, and reduced the requirement that the high pressure that produces line is taken place part; Save shadow mask, can eliminate the convergence errors that is produced by shadow mask, what at this moment need to adjust mainly is colour purity;

Saved shadow mask, under same brightness, line can reduce about 80%, can reduce interelectric repulsive force in the electron beam greatly like this, therefore can dwindle the luminous point imaging area;

Three electron beams of this color picture tube can be non-intersect, the increase that electron scattering that produces in the time of can eliminating electron beam like this and intersect and electron beam produce when intersecting interelectric repulsive force, more outstanding advantage is obviously to reduce the three electron-beam deflection center, the different colour purity errors that produced;

This color picture tube be because of saving shadow mask, and the influence in the assorted magnetic field that can reduce greatly to loose can be removed automatic degaussing circuit even, more makes the simplification of tube construction because of saving shadow mask, can significantly reduce cost;

This color picture tube also can improve the definition of image and the sense of reality, sense naturally significantly.The shadow mask of auto-convergence color picture tube is slotted, and three-color phosphor also is corresponding list structure, and image can be found out optical grating construction significantly, lacks the sense of reality.The phosphor strip of color picture tube of the present invention generally is continuous, and every kind of vitta all is 625, and so whole phosphor screen has 625 * 3 look=1875 vitta.Though line-scanning frequency still is 625 row.But because of every row has three vittas, adding horizontal pixel can increase greatly, and therefore, whole image is not seen optical grating construction, and definition is greatly improved clear image, true, nature.

Fig. 1 is the concise and to the point vertical longitudinal section of one embodiment of the present of invention, and wherein 4 is shells.

Fig. 2 is the simple and easy amplification of A portion of Fig. 1.

Fig. 3 is the phosphor screen schematic diagram of the embodiment of the invention.

Fig. 4 is the simple and easy amplification of B portion of Fig. 3.

Fig. 5 is a colour purity calibration schematic diagram.

Describe structure of the present invention and operation principle in detail below in conjunction with embodiment, on panel 1 inner face, arranging red, green, blue look fluorophor regularly, generally be coated with graphite between fluorophor of all kinds, be used for absorbing the luminous point peripheral electron.The fluorophor back generally covers aluminium lamination, fluorophor of all kinds is arranged in parallel from top to bottom by red, turquoise order, adorning the electron gun 7 that to launch three electron-beam in neck 3 inside, electron gun 7 is launched the electron beam of vertically arranging 6, source negative electrode, the control utmost point, screening electrode, focusing electrode and high-pressure stage etc. take place by the electronics that does not show and form in electron gun on figure, each utmost point adds the voltage of regulation, glass awl 2 is called as cone portion 8 with the nearby part that neck 3 is connected, and arrangement for deflecting 9 here is installed usually.

Three electron-beam begins to carry out line scanning from the left side, the red, green, blue bundle corresponds respectively to the red, green, blue phosphor strip on the phosphor screen, after delegation has swept, three electron-beam is got back to the fluoroscopic left side immediately, and, carry out the line scanning of second row, after last column has been swept corresponding to following one group red, green, blue phosphor strip, electron beam is got back to again topmost, carries out the scanning of next frame.

The comparable shadow mask tube of the electronic beam current of color picture tube of the present invention few 80%, can in electron gun, add the very little restriction fenestra in aperture like this, the marginal portion of beam cross section is covered, can reduce the sectional area of electron beam on the one hand greatly, can reduce interelectric repulsion on the other hand, make the size of the electron beam that shields enough little.

Vertical width when screen in order to reduce electron beam, the line deflector coil of present embodiment adopts the pincushion field to distribute, and field deflection coil adopts uniform magnetic field to distribute, because in the pincushion field, because the stressed difference of electron beam all directions can make electron beam compress in vertical direction.But the colour purity error that this has more strengthened electron beam can not correctly be got on the corresponding phosphor strip electron beam.The colour purity of present embodiment is adjusted with complementary field, with reference to the accompanying drawings on 5, two horseshoe magnet A, the B respectively around one pair of coil, be installed in the deflecting coil back near on the video picture neck of electron gun.Add parabolic current at M, N end, add sawtooth current, make the both sides bundle produce corresponding suitable deflection, get on thereby make three electron-beam on whole phosphor screen, can both get to corresponding phosphor strip to both sides at the D end.

The electron beam of present embodiment is Uncrossed, and this will make the adjustment of the above colour purity of saying much easier, because the intersection of the shadow mask tube and the electron beam of aperture plate pipe has increased radius of curvature different of each electron beam deflecting more, makes convergence more difficult.And electron beam does not intersect the difference of the radius of curvature that can reduce each electron beam deflecting, has reduced in other words can not get to phenomenon on the corresponding phosphor strip because of the different edge electron beams that cause in each electron beam deflecting center.

The property development of electron gun and deflection system is very fast now, and the distortion of electron beam and various aberration are more and more littler, and this all helps further dwindling spot definition.

Color picture tube of the present invention also can not economized shadow mask, and electron beam also can intersect, and below in conjunction with another embodiment of the present invention its structure and operation principle is described.

Accompanying drawing 6 is concise and to the point vertical longitudinal sections of another embodiment of the present invention.This is kind of an auto-convergence pipe, its fluorescence structure is identical with the fluorescence structure of the embodiment that says above, arranging horizontal strip fluorophor on panel 1 inner face, the planar mask (being called for short shady frid later on) 10 of panel 1 back placement level fluting, electron gun 7 sends the electron beam of vertically arranging 6, electron beam is assembled at place, shady frid slit, and get on separately the phosphor strip, the arrangement for deflecting 9 of this embodiment forms the barrel-shaped horizontal deflection magnetic field and the vertical deflection magnetic field of pincushion, is convenient to realize auto-convergence like this.If line scanning is 625 row, the phosphor strip of this embodiment also is 1875 in vertical direction, though this embodiment has shady groove, but because shady groove is the level fluting, so electron beam intersects at the place, slit all the time, so, electron beam only has peripheral small part electronics to get on the shady groove, the utilance of electron beam is more much higher than common shadow mask tube and aperture plate pipe, and under same brightness, line still can reduce about 70%, the reducing of line can make that beam cross section is long-pending to be reduced, and and then reduce the electronics that shady groove absorbs, reduce the luminous point imaging area, the resolving power of improving the standard greatly.In a word, the advantage of this embodiment is to reduce power consumption and promote clearness and the sense of reality of picture.

Above only for two embodiment, according to " three electron-beam carries out line scanning along the phosphor strip direction " this center, also other embodiment can be arranged, note, here the phosphor strip of saying is not limited to continuous phosphor strip, and fluoroscopic vertical length also can be equal to or higher than horizontal length.

Claims (2)

1, possessing by panel 1, with with the panel 1 glass awl 2 of sealed engagement mutually, and and the shell 4 that constituted of glass awl 2 necks that are connected 3, the energy that forms on the inner surface of panel 1 is by red, green, the phosphor screen 5 of blue three-colour light-emitting, be configured in the neck 3, can launch the electron gun 7 of three electron beams 6 towards phosphor screen 5, be installed on the outside of cone 8, can generation make above-mentioned electron gun electrons emitted bundle in the color picture tube of the arrangement for deflecting 9 of horizontal direction and vertical direction deflection, it is characterized in that three electron-beam carries out line scanning along the direction of phosphor strip.

2, by the said color picture tube of claim 1, the plane, place is vertical with horizontal plane when it is characterized in that three electron-beam is static, and the three primary colors fluorescent powder bar is horizontal from top to bottom.