TWI223305B - Electron gun structure of monochrome CRT - Google Patents

Abstract

An electron gun structure of monochrome CRT is provided. The electron gun is installed at least two electron flow emitting source (for example, cathode) to let the electron beam generated from each electron flow emitting source have thinner beam spot size, and is projected to same focus on the monochrome CRT screen to get better resolution and focus quality through gathering of focus lens or common lens. Therefore, this way can effectively improve the problem that the beam spot size cannot be easily reduced due to expulsion effect of the electron beam when driving larger current on a single electron flow emitting source of the traditional electron gun. Furthermore, the screen light-intensity can be increased to obtain better visual quality.

Description

1223305

Technical field to which the invention belongs: The present invention is an electronic grab structure for a monochromatic cathode ray tube, and one is applied to a monochromatic cathode ray tube to produce better resolution and aggregation. Electronic grab structure for high quality and image brightness. z… 口 口 Prior art:

According to the general traditional projection television system, it can be divided into two types: LCD projection television system and cathode ray tube projection television system. The projection television system that uses cathode ray tube to generate images can be divided according to the way of generating images. The projection methods are divided into two types: front projection and rear projection. In the projection television system of the cathode ray tube, there are three projection television systems that can be used / generated separately. Monochromatic cathode ray tubes (CRTs) of red, green and blue tones. The images produced by each of the monochrome cathode ray tubes can be enlarged through the projection lens unit and then projected to: On the front (or back) of the screen, the images of red, green and monitor colors are merged into one to form a color image on the screen. One

Taking a conventional traditional cast-type cathode ray tube projection television as an example, refer to FIG. 1, where each of the monochromatic cathode ray tubes 丨 丨 is used to magnify the played image through an optical lens group 12 and then Projected onto a reflective screen 13 and, through the reflective screen 13, the red, green and blue images played by each of the monochrome cathode ray tubes 11 are integrated into a color screen image. For viewers to enjoy. anti-

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In other words, the traditional type is a cast-type cathode ray tube projection television. Refer to FIG. 2. The images played by the monochromatic cathode ray tubes 21 are enlarged through an optical lens group 22 and then at least A reflective mirror 23 reflects and reflects the image onto a transmitting screen 24 (transmitting screen). The images of red, green and blue can be integrated into one on the converting screen 24. , The viewer can watch the color image day and time on the big screen from the conversion screen 24. Second, because in the aforementioned conventional cathode ray tube projection television system, whether it is a front-projection type or a rear-projection type, the image played by each of the monochromatic cathode-ray tubes must first be enlarged through an optical lens group, It must also be projected onto a screen where the optical lens group is maintained at a certain distance before the image being played can be enlarged. In order to achieve this purpose, the images broadcast by the monochromatic cathode-ray tubes must naturally have a considerable degree of brightness, otherwise, the images presented on the screens of the f-color cathode-ray tubes will be delayed due to the projection path. & and the projection or reflection conversion between them causes photon energy loss, and it is not possible to produce a high-level brightness and degree of image quality on the reflection screen 13 or the conversion screen 24. In order to solve this problem of insufficient brightness, the design and manufacturing of traditional cathode ray tube projection systems and manufacturers have increased the electron current emission source (such as the cathode) applied to the single cathode and tube by increasing the size. The electric current causes its production = two-energy electron beams to effectively increase the brightness of the image presented on the screen of each of the monochromatic cathode ray tubes, thereby improving the degree of image presented on the reflective screen or the conversion screen. And chroma. This approach, although it works

丄 223305 V. Description of the invention (3) Improving the brightness and chroma as described above. ○ σe Early an electron flow early-the number of electrons in the electron beam is used, and the occurrence of the electron beam breakage gradually expands, even though By adjusting the design of each of the monochromatic common lenses, or by borrowing the tube neck #, I got some restrictions. Therefore, I was extended by this limit. Therefore, I never thought about the size. This is the image interpretation of television for many years. And the main cause of poly-fouling. Due to the problem, the increase in radiation applied to the source causes the halo to occur along each of the cathodes. The cathode ray tube is improved or enlarged, but the limitation does not allow its electrons to be beta cast or focus quality. The large current due to the charge-color cathodization of the electrons should be due to the glass beam. The rear-projection type of the beam can no longer be placed, but it makes each other ray tube images. The area-modulated cathode emission effectively changes the screen phenomenon of the repulsion produced by the monochromatic cathode. The inner diameter of the focal lens or polar ray tube has a main lens that is not aligned to a cable management tube. It is the invention content: 点 ΐ ΐ :? f, $ Improve the traditional traditional cathode ray tube projection scene "The invention of the television has been researched and experimented for a long time, and finally the electron gun structure of the polar ray tube has been developed and designed. The electron beam grabbed by the tube's electrons emits the electron beam produced by Ebara, which has a narrower electron beam cross-sectional area SP0t (S1Ze), and can be projected on the screen of the monochrome cathode-ray tube. When the center position can result in better quality of Resolution and focusing. , 浐 έ 士 一 目 # ’is to provide an electron gun for a single-color cathode ray tube. Structure, the cathode ray tube has at least two electrons

$ 8 页 1223305 V. Description of the invention (4) Stream emission source (such as · · cathode) sub-beam, which has finer electrons on the screen and focusing quality of the focusing lens color cathode ray tube that the electron grabs. The cross-sectional area of the electron beam generated by the application of large electricity on the current emission source is not the screen brightness of the polar tube. Another object of the present invention is that the negative current on a unit area will be significantly less than that of a conventional monochromatic cathode ray, so the electron emission source can be greatly reduced. Its useful life. In order to enable the understanding and understanding of the present invention, it is necessary to make each electron current emit beam cross-sectional area (beam spot or common lens convergence under the same focal position), which can only effectively improve the traditional current. The problem of reduction of electric power can make it get better vision. In the present invention, each load (current load of a single electron stream emission source of the current loading tube, the size produced by the source), the better projection of the child In the mutual exclusion, the quality is greatly improved. The electron flow dens i source reduces the efficiency and increases the electricity, and can reach the single solution. The single structure of the yin structure, principle, and effect are illustrated with detailed examples. It is further explained as follows: Embodiment: ^ The invention is an electronic grab structure of a monochrome cathode ray tube, which is a single-color tube that can be used in projection televisions to produce red: green or blue tone images. The color cathode ray tube, the electronic cathode of the single-color cathode electric tube, the spring tube can be designed according to the actual design of the tube or the manufacturer's actual needs. Electron current emission source (such as cathode 2 and carbon nanotube), so that multiple 'beams' produced by each electron current emission source have a thin beam spot size (Beam Spot Size), and 1223305 Description of the invention (5) It can be projected to the same focal position on the screen of the monochromatic cathode ray tube under the convergence of electronic lenses such as focusing lenses or common lenses (according to the type of electronic lenses). In the present invention, such as As shown in FIG. 3, the electron emission sources 3 in the monochromatic cathode ray tube 51 are arranged in an array (M rows X ^ columns, where any one of M values) , Can be a complex number equal to or greater than 2), the electron current emission sources 31 shown in FIG. 3 are in 2 rows by 3 columns, so a plurality of electron beams 40, 41, 42, 43, 44, 44 can be generated , 45. Hai and other electron beams, 43, 44, 45 via this electron to grab 30.

The convergence of the electronic lenses can be projected onto the screen 3j of the monochrome cathode ray tube 51 at the same focal point 3 9 1 position. This design method is used to replace the traditional electron beam emission source of a single electron beam, which means that the present invention disassembles the traditional electron beam emission source of a single electron beam into a plurality of (M rows and XN columns) electron streams. 3-1. Therefore, the cross-sectional area of the plurality of electron beams 40, 41, 42, 43, 44, 45 in the array of the electron current emission sources 31 in the present invention can be reduced to the electrons of the original single electron beam. The M of the electron beam generated by the stream emission source is multiplied by a factor of N (ie, 1 / (ΜχΝ)), so that it has a smaller electron beam area. In this way, when each of the electron beams 40, 41, 42, 43, 44, 45 receives

ΐ Convergence of the focusing lens or common lens of the electronic grabbing 30, and when projected to the same focal position on the screen 39 of the early cathode ray tube 51, not only will the monochrome cathode ray tube 51 produce a better resolution The degree and focus quality can also have the problem that when the traditional electron gun applies the same large current to a single electron current emission source, the cross-sectional area of the electron beam due to the mutual repulsion of electrons in the electron beam cannot be easily reduced.

1223305 V. Description of the invention (6) 31 Xi S: The special attention is the source of the electron current emission in the present invention. It is understood that in the field of the present invention, the artist uses the == column method, as in the third, 4 (a and 4 (c), the three angles of change shown in the figure; and = 'Whether the distance between each of the electron stream emission sources 31 is at a special distance or not # space, as long as the multiple electron beams 剡, 2 on 5 and 4 on the same 3-\ 4 o'clock 2 'wide system projection to the position of the sub-stream emission source 31 of the monochrome cathode ray tube 51' should belong to multiple groups of electricity 5 (a) and: Refer to the screens of the bipolar ray tube 51 generated by the third and several electron beams 40, 41, and 4H4 electron current emission source 31. 39_ ^ 43 =, 45 'are projected onto the monochromatic Yin full cross and converge in the same — / Shou, as shown in Figure 5 (a), the system can be gathered together; one position :: set by or as shown in Figure 5 only partially overlapping sinks 44, 45 cross-sectional area has been wiped 5 r ^ At each electron beam 40, 41, 42, 43 and 391 at the same focal point, the contractor completely or partially overlaps the convergence and focusing quality, and the focusing position is better in the second section of the mask. Resolution M It is greatly improved: more electron currents are gathered, and the enabling screen can be seen from the above. The color of the cathode-ray tube 51 is based on the invention, which is very suitable for high-resolution applications. The resolution capability of screen 39, in addition, the current required will be more traditional: ^ electron beam 4 °, 41, 42, 43, 44, 45, 'which minus >, many, so each electron current emission source 1223305 five 、 Explanation of the invention (7) The current load per unit area (for example: the cathode) (Current i〇ading density) will also be greatly reduced. This will prevent expensive use of high-quality projection televisions. Impregnated electrode, and the large beam reduces the production cost. In a preferred embodiment of the present invention, please refer to Figs. 3, 6 and 7, the electron grab 30 of the monochrome cathode ray tube 51 includes 3 rows of X An array of electron current emission sources 31 arranged in an array. These electron current emission sources 31 are used to generate three electron beams 40, 41, 42 with energy, and direct them to a G1 control electrode (control grid) 32 and a G2 screen grid 34, which are sequentially displayed therethrough The electrode holes 32a, 32b, 32c and 34a, 3 4b, 3 4c corresponding to the straight line are arranged, among which the electron current emission source 31, the G1 control electrode 32 and the G2 screen electrode 34 form the electron beam of the electron grab 30 A beam forming region (or BFR for short). The electron beam forming region causes the electron current emitted by the electron current emission source 31 to form 3 rows X 1 columns of electron beams 40 in an array. 41, 42. Alas, the electron beams 40, 41, and 42 pass through a focusing lens composed of a G3 focal condenser electrode 36 and a G4 anode 38, and the polar holes 3 6 a, 3 6 are arranged in a straight line on the beehive. b, 36c, 38a, 38b, 38c, will be projected and converged to the same focal point 3 91 position on the screen 39 of the monochrome cathode ray tube 51, and then deflected by one of the settings on the monochrome cathode ray tube 51 Vehicle 50 (Deflection yoke) 50, from left to right, from top to bottom, performs a point scan on the entire screen 39, and a monochrome image can be presented on the screen 39. In this embodiment of the present invention, 30 electrons are sealed in the neck 52 of a 7-inch monochrome cathode ray tube 51 for a projection television.

V. Description of the invention (8) As shown in Figures 6 and 7, and through proper adjustment, the generated 3 rows X 1 columns are arranged in an array of electricity = 4n 'focus and lens, so that the monochromatic cathode ray tube 51m is collected. ,? "2. When remittable, the order made by the present invention: the same as the above-39. Focus point. This centimeter (_). &Quot; The director of the polar ray officer 51 is 235. γ tube isobar \ H & (hereinafter referred to as the experimental tube) compared with a manifold (hereinafter referred to as the traditional tube), a voltage of 32,000 volts is applied to the m ^ polar ray pole, and "" volts is applied to the G2 screen pole When the & voltage of the eyepiece is pressed and the G1 control electrode is grounded, the relationship between the emission current of the electron current emission source and the screen can be measured, as shown below: Tube type 1 · Experiment tube 2 · Foot lambert (Foo 11 amber t) Candle current (# A) 300 660 667 600 1178 1049 800 1475 1256 Page 13

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V. Description of the invention (9) 1000 1745 1479 As can be clearly seen from the above list and shown in FIG. 8, the screen brightness of the experimental tube of the present invention is higher than that of the traditional tube when operated at a high current (丨 00 to A). It is about 18% higher. Under normal normal current (60 0 // A) operation, the screen brightness of the experimental tube of the present invention is also about 2% higher than that of the traditional tube. In addition. Because when the total current of the experimental tube of the present invention is 600 // A, among the electron current emission sources in which three rows and X columns are arranged in an array, the current load of each electron current emission source is only 200. // A, that is, the electricity of a single electron current emission source of a traditional tube / 'one of two loads of lL', so it can greatly reduce the current load per unit area of each electron current source, thereby increasing the electron current Effective life of the source. According to the above, it is only a preferred embodiment of the present invention, but the structural features of the present invention are not limited to this. Any person skilled in the art can easily think of changes or modifications in the field of the present invention. For example, if a monochromatic cathode ray tube made by other types of electron guns is used, if a plurality of (M rows and XN columns) electron beams are generated by an array of electron current emission sources, the f is cast to the monochromatic cathode. The same focal position on the screen of the ray tube should all fall within the scope of the patents of the following case.

Page 14 1223305 Schematic description --- Schematic illustration: Figure 1 is a schematic diagram of the architecture of a traditional front-projection cathode ray tube projection television system. Fig. 2 is a schematic diagram of the structure of a conventional rear projection type cathode ray tube projection television system. Fig. 3 is a schematic structural diagram between the electron current emission sources arranged in an array and the screen of a monochromatic cathode ray tube in the electronic grab of the present invention.

Figures 4 (a) to 4 (c) are schematic front views of the electron current emission sources arranged in other ways in the electronic grab of the present invention. Figures 5 (a) to 5 (b) are electron beams generated by the electron current emission source of the present invention, projected onto the screen of the monochromatic cathode ray tube under the convergence of the focusing lens or common lens of the electron. Schematic diagram of the same focus position. FIG. 6 is a schematic structural diagram of an electronic grab in a preferred embodiment of the present invention. FIG. 7 is a schematic diagram of the appearance of the preferred embodiment. Fig. 8 is a schematic diagram showing a comparison between the emission current and the screen brightness between the preferred embodiment and a monochrome cathode ray tube used in a conventional projection television. The main symbols:

Electron gun 30 Electron emission source 31 G1 control electrode 32 G2 screen electrode 34 G3 focal electrode 36 G4 anode 38

Page 15 1223305 Schematic illustration screen 39 focus 3 9 1 pole holes 32a, 32b, 32c, 34a, 34b, 34c, 36a, 36b, 36c, 38a, 38b, 38c Electron beams 40, 41, 42, 43, 44 , 45 biased towards 50 cathode ray tubes 5 1 neck 52

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Claims (1)

1223305 6. Scope of patent application ^ 1. An electronic grab structure of a single-color cathode-ray tube. One of the electron guns installed in the single-color cathode-ray tube includes at least two electron current emission sources, each of which The electron beam generated by the emission source can be used for the convergence of an electron lens formed in the electron grab = the same on one screen of the monochromatic cathode ray tube-the focal point is shot to) 2. If the scope of patent application In the electronic grab structure described in item 丨, each of the electron current emission sources is arranged in an array. 3. The electronic grab structure as described in item 2 of the scope of patent application, wherein each of the electron current emission sources is arranged at an equal interval. 4. The electronic grab structure as described in item 2 of the scope of the patent application, wherein the emission sources of the electron streams are arranged at non-equidistant intervals. 5. The electronic grab structure described in item 1 of the scope of patent application, wherein each of the electron current emission sources may be a cathode. 6. The electron gun structure described in item 1 of the scope of the patent application, wherein the electron current emission source may be a nano carbon tube. 7. The electronic grab structure described in item 1 of the scope of patent application, wherein the electronic lens may be a focusing lens. 8. The electronic grab structure described in item 1 of the scope of patent application, wherein the electronic lens may be a common lens. 9. The electronic grab structure described in item 1 of the scope of the patent application, wherein the electronic grab of the monochrome cathode ray tube still includes: a G1 control electrode, the G1 control electrode is located adjacent to each of the electron current emission sources There are a plurality of pole holes arranged in an array thereon; a G2 screen pole is arranged on the G1 control pole away from each of the electrons Page 17 1223305 6. One side position of the stream emission source in the patent application range, there are a plurality of pole holes arranged in an array, and the electron stream emission source and the G1 control electrode form the electron grabbed by the electron. In the beam forming area, when the electron current emitted by each of the electron current emission sources passes through the G1 control electrode and the corresponding hole in the G2 screen electrode, an array of electrons is formed in the electron beam forming area. bundle. 10. The electronic grab structure as described in item 9 of the scope of the patent application, wherein the electron gun of the monochrome cathode ray tube still includes a G 3 focal polymer electrode, the G 3 focal polymer electrode is provided on the g 2 screen One pole is far away from one side of the G1 control pole, and a plurality of poles L arranged in an array are arranged on the side; one G4 anode 'is arranged at one side of the G3 focal electrode away from the G2 screen pole, There are a plurality of pole holes arranged in an array, and the focusing lens of the electron gun is combined with the G 3 focal focusing electrode, so that each of the electron beams arranged in an array passes through the G 3 focal focusing electrode and After the corresponding electrode hole on the g 4 anode, it is projected and converged to the same focal position on the screen. Page 18