JPH08185809A - Multibeam group electron gun for color crt - Google Patents

Abstract

PURPOSE: To provide a multiple beam electron gun for supplying color video image information on horizontal scanning lines arranged at a fixed interval in adjacent vertical directions simultaneously by using beams which are arranged in order in the vertical direction and are grouped. CONSTITUTION: Beams which are arranged in a row in the horizontal direction at a fixed interval in a plurality of vertical directions supply the three primary colors, namely, red, green, and blue, are converged on a common spot on a screen, and are modulated. As a result, the arrangement in the adjacent vertical directions enables writing of a plurality of video image information on the screen when adjacent parts of color video image are formed simultaneously. A grid in which a current is carried includes openings 88b, 88g, 88r, 90b, 90g, 90r arranged in order in the horizontal directions in upper and lower rows to pass the arrangement of beams arranged in one row in a beam formation region of an electron gun. An interval SV in the vertical direction between openings in the upper and lower rows and an interval SH in the horizontal direction between opening groups arranged in order in the vertical direction are as follows: 1/20SH<=SV<=1/2SH.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates generally to multi-beam electron guns used in color cathode ray tubes (CRTs), and more particularly to a portion of a color video image on a CRT screen.
Targets electron guns with grouped electron beams to provide on more than one horizontal scan line simultaneously.

[0002]

2. Description of the Related Art The future development trend of color CRTs is clearly moving toward high definition television (HDTV) display. This is true whether you follow the NTSC standard or the PAL configuration. Whatever your color television system, high-definition television (HDTV) displays require high-frequency magnetic deflection yokes and high resolution and brightness of video images. Increasing the scanning frequency of a magnetic deflection yoke in a CRT requires more deflection input power for the yoke and more expensive yoke assembly. In order to provide satisfactory brightness and resolution for a large 16: 9 color CRT, it is necessary to increase the beam current and increase the video image resolution. Increasing the size of the CRT envelope neck runs counter to the current trend to shrink the non-screen portion of the CRT. One approach to providing sufficient brightness for video images by using a higher beam current is to employ a dispenser cathode that provides a high electron emission density. However, using a dispenser cathode makes the cost of the cathode considerably higher. That is, the cost of conventional oxide cathodes is 50 times higher, and the use of this rare cathode in CRTs is now commercially nonviable. Although some of the above approaches have been adopted for high definition television (HDTV) CRTs, other displays such as liquid crystal displays (LCDs), plasma display panels (PDPs) due to the increased cost and complexity of CRTs. Compared to technology, it is less commercially competitive.

[0003]

Please refer to FIG. Color C
Typical prior art multiple beam electron beam used in RT
Isometric view of the handset 10 with a partial perspective view
I am. Installation line 2 for the electron gun 10 shown in FIG.
A cross-section along line -2 is shown in Figure 2. Electronic
The gun 10 has a plurality of openings 18 arranged in a row at regular intervals.
Generally a G1 control grip with a, 18b, and 18c.
In the direction of the edge 18, a constant interval providing a plurality of active electrons
Includes a plurality of cathodes 12, 14, and 16 aligned in
to watch. The active electrons are aligned with the openings 18a, 18
a row of aperture arrays 2 passing through b and 18c
G2 screen grid 2 with 0a, 20b, and 20c
It is turned in the direction of 0. G1 control grid 18, and
And the G2 screen grid 20 have a beam forming area (BFR) 4
6 make up a large number of active electrons in dotted lines
The three electron beams 22, 24 arranged in a line,
And 26 are formed. Further, the electron gun 10 is an electron gun.
G3 grid 28 and G4 grid aligned along the vertical axis of
Includes lid 36. The G3 grid 28 is typically
Multiple openings lined up in a row facing the G2 screen grid 20
28a, 28b, and 28c and a plurality of
Internal metal with internal openings 30a, 30b, and 30c
Includes plate. The G3 grid also has a G4 grid.
The enlarged chained shape that is horizontally aligned and faces the door 36.
Includes through-opening 34. Similarly for the G4 grid 36,
3 Grid 28, aligned horizontally and enlarged
Includes a chain-shaped common opening 39. The G4 grid 36 has been updated
Through electron beams 22, 24 and 26 respectively
Three aligned openings 36a, 36b, and
Includes internal metal plate 38 including 36c. G3
The lid 28 and the G4 grid 36 work together to provide a high voltage focus lens.
The electron beam trio 22 and 2
4 and 26 are accelerated, and CRT screen or screen
Focus on plate 40. Placed on the inner surface of screen 40
It emits light in response to the electron beam being projected.
It is the phosphorus layer 52 that is irradiated. G1 grid 18 and G2 green
Each head 20 is V_G1And V _G2Voltage sources 41 and 4
It is connected to 3. G3 grid 28 and G4 grid
Each of the dots 36 has a focus (V_F) Voltage source 45 and acceleration (V
_A) Connected to a voltage source 47,_F)
Be charged, (V_A) Will be accelerated.

An elevation view of the CRT screen 40 is shown in FIG. There also, the horizontal scan line 42 is illustrated, and as the video image is tracked on the screen, the electron beam is swept over the scan line by the magnetic deflection yoke means of the CRT (not shown for simplicity). I will show you how. For simplicity, only 12 scan lines are shown, but it is known that in a typical CRT there are many more horizontal scan lines. The start of the electron beam trace for the first horizontal scan line is indicated by the arrow in the upper left corner of FIG. 3, while the start of the electron beam trace for the last horizontal scan line is indicated by the dotted line in the lower left corner of the diagram. I will.
The electron beam is focused on the screen 40 in the form of spots 44, rastering from left to right, top to bottom, and traced across the screen, as seen in FIG. Drawing board 4
Each horizontal sweep of zero electron beams provides a single horizontal line of video image displayed on the screen. Electron gun 1
The Zero is typical of electron guns used in conventional in-line color CRTs, which are generally subject to the design and operational constraints mentioned above. The present invention addresses the aforementioned limitations of the prior art by providing a multi-beam group (MBG) electron gun for use in a color CRT. In a color CRT, three primary colors of red, green, and blue are provided to adjacent horizontal scan lines on a CRT screen by an electron beam array (array) arranged in a row in the horizontal direction at regular intervals in two or more vertical directions. It is possible to form two or more adjacent lines of video image on the screen at the same time.

Accordingly, it is an object of the present invention to provide multiple beams of vertically aligned and grouped electron beams to simultaneously provide color video image information on adjacent vertically spaced horizontal scan lines. Is to provide an electron gun. Another object of the present invention is to increase the pixel dwell time of electron beams in a row of color CRTs, thereby increasing the resolution of the video image, but at the same time, the horizontal scanning frequency without sacrificing the brightness of the video image. And to reduce the peak beam current. Yet another object of the present invention is to provide a magnetic in a multi-beam color CRT while maintaining a high resolution of the electron beam spot without increasing the size of the CRT neck or increasing the demand for deflection power. It consists in relaxing the requirements of the deflection yoke and the cathode emission.
Yet another object of the present invention is to retrieve the received color video image information for subsequent display on the first horizontal scan line in order to increase the portion of the video image displayed in each horizontal scan of the CRT screen, Furthermore, it is to store the received color video image information in order to add and display the video image information stored on the second adjacent scan line at the same time.

[0006]

This object of the present invention is accomplished by an in-line electron gun for a multi-beam color cathode ray tube (CRT), and eliminates the drawbacks of the prior art. . On the screen included in this CRT, electron beams aligned in a plurality of horizontal directions at regular intervals,
A video image is formed by sweeping a horizontal scan line in rasters at regular intervals in multiple vertical directions. So each electron beam provides one of the three primary colors of the video image: red, green and blue. The electron gun consists of: That is, multiple cathodes that provide active electrons. A first and a second energized electrode disposed adjacent to the cathode and having a first and a second aperture array at regular intervals for forming active electrons into a plurality of beams, respectively. Beam forming area (BFR) including the grid. Also, the first and second aperture arrays of the grid are, respectively,
For each horizontal scan line in the top and bottom rows, red,
Includes horizontally aligned apertures in the top and bottom rows that pass horizontally aligned electron beams that provide the three primary colors of green and blue. The apertures in the first and second arrays are also aligned vertically to form a vertically grouped electron beam to provide one of the three primary colors on each horizontal scan line. Have been grouped together. There, the vertical spacing between adjacent upper and lower row openings is denoted S _V , and the horizontal spacing between vertically aligned groups of openings is denoted S _H.

[0007] is _{1/20 S H ≦ S V ≦ 1} /2 S H. In order to focus the electron beam on the screen, the beam forming area (B
Focusing means arranged between the FR) and the CRT screen.
The focusing means, located between the focusing lens and the screen, focuses the electron beam on the upper and lower spots of the screen. On the screen, the top and bottom spots are swept on the horizontal scan lines in the top and bottom rows, respectively. The present invention further considers a G1 control grid for a color cathode ray tube (CRT). The control grid receives the energetic electrons from the cathode and, in forming a video image on the screen, sweeps the energetic electrons into a plurality of electrons in a horizontal sweep in a raster fashion across the screen of the CRT. Adopted to form a beam. The grid includes first, second, and third horizontally aligned upper row conductive portions employed to connect to a respective first video signal source and a second respective video signal. Consists of a first, second, and third horizontally aligned bottom row conductive section employed to connect to the source. G1
The control grid also includes an isolation device located intermediate the adjacent conductive parts to electrically insulate the conductive parts. The G1 control grid of the present invention further includes first, second, and third horizontally aligned top row apertures respectively located within each one of the top row conductive portions. Each aperture in this top row is a top row that is swept horizontally over a first top scan line with a corresponding top row electron beam that forms one of the red, green, and blue primary colors of the video image on the screen. Let it pass along with the electron beam. Further, according to the present invention, G1
The control grid includes first, second, and third horizontally aligned bottom row apertures, each located within a respective one of the bottom row conductive portions. Each aperture in this bottom row, together with the top row electron beam that is horizontally swept on the second bottom row scan line, forms each one of the three primary colors red, green, and blue of the video image on the screen. Let the electron beam pass. The first, second, and third groups of upper and lower row apertures are horizontally aligned to pass an electron beam that forms the same primary color on the screen. The vertical spacing between vertically aligned aperture groups is shown as S _V , and the horizontal spacing between vertically aligned aperture groups is shown as S _H.

[0008] is _{1/20 S H ≦ S V ≦ 1} /2 S H.

[0009]

EXAMPLE See FIG. In accordance with the principles of the present invention, an isometric view of a portion of a multi-beam group electron gun 60 for a color CRT is shown in partial perspective view. FIG. 5 is a vertical vertical cross-sectional view of the multi-beam group electron gun 60 shown in FIG. 4, taken along installation line 5-5. Electron gun 60 is a bipolar potential electron gun and includes multiple cathodes 62, 64, and 66 arranged in a row to provide active electrons towards a G1 control grid 74. Further details of the G1 control grid 74 are illustrated in the elevation view of FIG. 7 and described below. The G1 control grid 74, in combination with the G2 screen grid 76, provides a beam forming region (BFR) for the electron gun 60 to form active electrons into three pairs of vertically aligned electron beams 72. The pair of electron beams in the center are shown in the sectional view of FIG. 5 as the upper row electron beam 72a and the lower row electron beam 72b. Electron gun 60 further includes a combination of G3 grid 78 and G4 grid 80,
Together they form the high voltage focus lens 70 and the CR
Focus the electron beam on the T screen 61. The phosphorus layer or coating 63 arranged on the inner surface of the screen 61 is
When it is projected by an electron beam, it reacts and emits light, forming a video image on the screen.

Both the G1 control grid 74 and the G2 screen grid 76 are generally flat with three pairs of vertically aligned apertures for passing the six electron beams 72. The G2 screen grid 76 includes three lined coined portions 76a, 76b, and 76c, each having a pair of vertically aligned beam passage apertures. The G1 control grid 74 faces the three cathodes 62, 63, and 64, facing the first, second, and
And a third non-conductive ceramic substrate 103 with coined or embossed portions 82, 84, and 86. First coined portion 82
A pair of vertically aligned openings 88b and 90b are arranged in the area of and extend through the ceramic substrate 103. Similarly, disposed within the second and third coined portions 84 and 86, respectively, and extending through the ceramic substrate is a vertically aligned second and third pair. Opening 88g and 90g, and opening 88r and 90r. The openings 88b and 90b allow the blue electron beam to pass, the openings 88g and 90g allow the green electron beam to pass, and the openings 88r and 90r allow the red electron beam to pass. Thus, the upper row aperture trios 88b, 88g, and 88r pass three electron beams to produce the three primary colors, while the lower row aperture trios 90b, 90g, and 90r form the three primary colors on the screen. Let the electron beam of the book pass through. In addition to this example, in the example described below, the vertical spacing between adjacent openings was on the order of 50 mils (1.25 millimeters), whereas the conventional array was arranged in a row. 20 with an electron gun
It is 0 mil (6 mm). In accordance with the present invention, the three electron beams passing through the upper row apertures 88b, 88g, and 88r are focused to the first upper spot at the screen while the lower row apertures 90b, 90 are provided, as will be described in detail below.
The electron beam passing through g and 90r is focused on the second lower spot. The upper row of electron beams is tracked by the magnetic deflection yoke of the CRT on the first upper row of horizontal scan lines, while the second pair of electron beams is adjacent to the second lower row of horizontal scans on the CRT screen. Tracked on the line. This procedure allows adjacent portions of the video image on screen 61 to be formed simultaneously by two or more aligned electron beams that are swept across the screen.

The G1 control grid 74 further includes a G2 screen grid.
6 thin conductors placed on the surface facing the lid 76
Parts 92, 94, 96, 98, 100, and 102
includes. The conductive part is soldered with a thin conductive metal layer
Shape by mounting or clamping it on the ceramic substrate.
Will be made. After that, a series of
Chemical to form a non-conductive insulating gap
Part of the conductive layer is removed by a conventional method such as
Excluded. Insulation gap 104 allows
A certain ceramic substrate is exposed and the above-mentioned six conductive parts
92, 94, 96, 98, 100, and 102 defined
Will be done. Each conductive portion 92, 94, 96, 98, 10
0 and 102 are the beam passage openings of the G1 control grid.
Mouth 88b, 88g, 88r, 90b, 90g, and 9
Surrounding each one of 0r and provided to each conductive portion
Each electron beam is individually controlled by each video signal.
Allows for modulation. Top row of three conductive parts 9
Connected to 2, 94, and 96 respectively
Is V_1AB, V_1AG, And V_1ARVideo signal source 10
6, 108, and 110. Similarly, the three lower rows
Connected to the respective electrical parts 98, 100 and 102
What is V_1BB, V_1BG, And V_1BRVideo signal
Sources 112, 114, and 116. Each of the above videos
The signal source has its own video for the corresponding conductive part.
When a signal is provided, an opening within the range of a particular conductive part
The electron beam passing through is modulated. Thus, V
_1AB, V_1AG, And V_1ARVideo signal sources 106, 10
8 and 110 respectively have openings 88b, 88g,
Modulates the electron beam passing through and 88r. As well
To V_1BB, V_1BG, And V _1BRVideo signal source 11
2, 114, and 116 are openings 90b, 9 respectively.
Modulates the electron beam passing through 0g and 90r.
You. In this way, the first part of the video image
Upper row electrons passing through openings 88b, 88g, and 88r
The one provided on the screen of CRT by beam trio
In the same way, the bottom row of adjacent video
Electron beam passing through 90b, 90g, and 90r
Offered by Rio.

Please refer to FIG. There, a simplified elevation view of a CRT screen 61 and how a video image is formed by means of the electron gun 60 shown in FIGS. 4 and 5 is illustrated. As shown in the upper left hand part of FIG. 6, the electron beam trio in the upper row described above is focused in the form of an upper spot 95a on the screen 61, while the electron beam trio in the lower row is on the screen. It is focused in the form of the lower spot 95b. The upper and lower electron beam spots 95a and 95b are aligned horizontally and are not shown for simplicity, but the CRT
By means of the magnetic deflection yoke, it is displaced synchronously to the right along each horizontal scanning line 83a, 83b as shown by the direction of the arrow in the figure. As soon as the electron beam trio in the upper and lower rows arrive at the right-hand end of the screen 61, they are immediately deflected to the left and start tracking the third and fourth scan lines on the screen. This scanning and re-tracking is continuous and the electron beam trio in the top and bottom rows is the last two horizontal scan lines 8 shown in dotted lines in the lower left part of FIG.
It is repeated until scanning 5a and 85b. Screen 61
As soon as the scanning of the last two scan lines 85a and 85b of the magnetic field is finished, the electron beam trio in the upper row and the lower row starts to re-track the first two scan lines 83a and 83b. It is re-tracked by the means of the deflection yoke and is located at the top of the screen. Tracking two or more horizontal scan lines simultaneously reduces electron beam scan frequency and deflection frequency ratio, and also reduces yoke power supply requirements. This makes it possible to use simpler and cheaper magnetic deflection yokes. The "dwell time" of the electron beam on the phosphor layer component of the screen increases in response to the decrease in beam scanning frequency. As the electron beam dwell time increases, the peak current density of the electron beam decreases correspondingly, increasing the spot size of the electron beam and the resolution of the video image without sacrificing the brightness of the video image.

As illustrated in FIG. 7, each of the aforementioned video signal sources includes its own memory. Therefore, V
_1AB, V _IAG, and V _1AR video signal sources 106,10
8 and 110 are respectively video storage 106a,
Includes 108a and 110a. Similarly,
V _1BB , V _IBG , and V _1BR video signals 112, 11
4 and 116 are respectively video stores 112a,
Includes 114a and 116a. Each of the above video stores is employed to store the video data and then write the stored video data to the associated video signal source circuit to excite the connected conductive portions according to the video image displayed on the screen 61. I will. Upper row opening 8
The upper row electron beams passing through 8b, 88g, and 88r are each swept across the horizontal scan line in the upper row. On the other hand, each of the three electron beams passing through the lower row openings 90b, 90g, and 90r is swept across the adjacent lower row horizontal scan line on the screen. Therefore, 3
The upper row electron beam and the three lower row electron beams simultaneously pass through the beam passing openings 88b and 90b for providing blue, the beam openings 88g and 90g for providing green, and the beam openings 88r and 90r for providing red. Write each adjacent line of the color image on the screen 61 with the beam. When the electron gun 60 is used in a color CRT such as a television receiver, the above-mentioned various video memories store the data from the received television signal, and then the data is read from the memory to control the G1 control. It is provided for each one of the conductive parts of the grid 74. The electron beam trios in the upper and lower rows are swept horizontally across the screen 61 and at regular intervals in the vertical direction between the two electron beams. The duration of storage within each of the video stores associated with these beams is longer than the duration of storage of video data corresponding to the storage associated with the bottom three electron beams. With this arrangement, video image information can be written simultaneously to adjacent parts on the screen in the vertical direction at regular intervals.

As shown in FIG. 5, the G2 screen grid 76 is connected to the V _G2 voltage source 65 to properly deflect the electron beam. Similarly, G3 grid 7
8 is connected to a focus voltage (V _F ) source 67 to focus the electron beam on screen 61. G4 grid 8
0 is an accelerating voltage (V
_A ) Connected to source 69. Description above and FIG.
The G2 screen grid 7 is displayed in more detail.
6 is a partial vertical sectional view. The coined or embossed portion 76b of the grid has a pair of openings 76 vertically aligned at a constant interval for passing the upper row electron beam 72a and the lower row electron beam 72b, respectively.
Includes d and 76e. The G3 grid 78 faces the G2 screen grid 76 and has the openings 8a, 78 of the figure 8 shape.
Including b and 78c, it passes the electron beam paired with each other. The G3 grid 78 further includes three evenly spaced internal elliptical openings 78d, 78e.
And 78f, these apertures pass through each pair of upper and lower row electron beams. Finally, G
The 3-grid 78 faces the G4 grid 80 and includes a chain-shaped common aperture 78g which is horizontally aligned and expanded to allow passage of 6 electron beams. The G4 grid 80 also includes a horizontally aligned chain of openings 80a facing the G3 grid 78. The G4 grid 80 is
Three internally spaced elliptical openings 80
Includes b, 80c, and 80d, passing each pair of electron beams in the upper and lower rows.

Please refer to FIG. According to the invention, the color C
A partial longitudinal vertical cross-section of the multi-beam group electron gun 60 of Figures 4 and 5 at RT118 is shown. The CRT 118 includes a glass envelope 120 that includes a cylindrical neck portion 120a and a funnel portion 120b of increasing diameter. CRT11
8 further includes a plurality of stalk pins 122. this is,
The neck portion 120 of the glass envelope 120 of the CRT
CR that extends through the end of a and starts with the electron gun 60
It provides various electrical signals to the other components within the T glass envelope. Also located on the funnel portion 120b in the glass envelope 120 of the CRT is a conductive coating 126, which is connected to the anode voltage source, although not shown for simplicity. G4 grid 8
0 is connected to the inner conductive coating 126 by means of a plurality of spaced conductive positioning spacers 128 and 130 to charge the G4 grid to the anode voltage (V _A ). The magnetic deflection yoke 124 is arranged around the funnel portion 120b of the CRT and deflects the electron beam in a raster on the screen 61. Omitted from Figures 10 and 5 is the color CRT shadow mask. It contains a number of apertures or slots at regular intervals and acts as a color selection electrode,
Make sure that each electron beam is emitted onto the specific color phosphorous element of the phosphorous layer 63 on the inner surface of 1. The design and operation of the shadow mask is conventional and will not be discussed further here.

As shown in FIG. 10, the two vertically aligned central electron beams 72a and 72b are
It is projected on the screen 61 of the CRT at regular intervals in the vertical direction. Similarly, the outer pairs of electron beams are also projected on the screen 61 at regular intervals in the vertical direction. As a result, the electron beam trios in the upper row and the lower row are displayed on the screen 61
Each adjacent horizontal scan line can be traced during each trace. Arranged around the CRT 118, approximately in the middle of the electron gun 60 and the magnetic deflection yoke, are the first and second multipole magnetic alignment devices 132 and 134. First magnetic alignment device 132
Is a dipole magnet (or dipole) 132a, a quadrupole magnet (or quad type) 132b, and a hexapole magnet 132.
It consists of c. Second magnetic alignment device 13
4 includes a quadrupole magnet 134a and a hexapole magnet 134b. When aligning the electron beams in the vertical direction at regular intervals on the screen 61, a detailed description of the operation and configuration of the first and second multi-pole magnetic alignment devices 132 and 134 is provided in the electron gun. See another example below of an electron gun of the present invention that includes electron beams grouped at regular intervals in a direction.

Please refer to FIG. According to the invention, the color C
Another embodiment of the multi-beam group electron gun 140 used in ET is shown. FIG. 12 is an installation line 12 of the multi-beam group electron gun 140 shown in FIG.
It is a vertical cross section along -12. Electron gun 140
Are three in-line cathodes 14 that provide active electrons.
Includes 2, 144, and 146. Cathode 142, 1
Adjacent to 44, and 146 is a beamforming region (BFR) 148, which includes a combination of G1 control grid 152 and G2 screen grid 154. The electron gun 140 further includes a beam forming area 148 and a CRT screen 168 as shown in the cross-sectional view of FIG.
Includes a high voltage focusing lens 150 located between and. The high-voltage focusing lens 150 includes a G3 grid 156,
G4 grid 158, G5 grid 160, and G6
Includes grid 162. G2 grid 154 and G4 grid 158 are connected to V _G2 voltage source 172, while G3 grid 156 and G5 grid 16
0 is connected to the focal voltage (V _F ) source 174. G
The 6 grid 162 is connected to an accelerating voltage (V _A ) source 176. Thus, the electron gun 140 is a quad type.

In the embodiment described in the previous section, the G1 control grid 152 and the G2 screen grid 154 each have 6
3 aligned vertically to form a book of electron beams
Includes a pair of openings. Each electron beam passing through a pair of vertically aligned apertures has one of the three primary colors of red, green and blue.
One on the CRT screen 168. The phosphorus layer 170 is
It is located on the inner surface of the screen 168. The three horizontally aligned electron beams are focused on one common spot on the screen 168 of the CRT, and each sweep of the screen is synchronously displaced along the common horizontal scan line.
Thus, the electron beam trio in the top row forms the first top portion of the video image on the first horizontal scan line, and the electron beam trio in the bottom row forms the first top portion of the video image on the adjacent horizontal scan line in the bottom row. Can form the lower part of the second. The G3 grid 156 faces the G2 screen grid 154 and has a first trio of Numeral 8 shaped openings, 156a, 15a.
6b and 156c are included. The G3 also includes a second trio of larger figure 8 apertures, 156d, 156e, and 156f, facing the G4 grid 158. The upper and lower enlarged portions of each numeral 8 shaped aperture are adopted to pass each electron beam, and the apertures are opened to pass each paired electron beam at regular intervals in the vertical direction. 156a and 156d,
Openings 156b and 156e, and openings 156c and 156
f is a common alignment. The G4 grid 158 likewise includes three regularly spaced figure-eight apertures 158a, 158b, and 158c for passing vertically aligned pairs of electron beams. The G5 grid 160 faces the G4 grid 158 and includes three aligned number eight openings 160a, 160b, and 160c. G
5 grid 160 further includes three aligned elliptical apertures 160d, 160e, and 160f, each of which is configured to pass an electron beam through a vertically aligned pair of apertures. 160a, 16
It is aligned corresponding to 0b and 160c. G5
The grid 160 further faces the G6 grid 162,
Includes 160g of horizontally aligned and expanded chain-shaped common aperture that allows all six electron beams to pass through. Similarly, the G6 grid 162 also includes a chain-shaped common opening 162a aligned in the horizontal direction, and three elliptical openings 16 arranged in a row.
Includes 2b, 162c, and 162d. Common aperture 162a passes all six electron beams, while one elliptical aperture 162b, 162c, and 162d passes each pair of vertically aligned electron beams. The sectional view of FIG. 12 shows two central electron beams 16
4 and 166 as they are deflected across the screen
Is projected vertically on the screen 168 at regular intervals,
The tracking of adjacent horizontal scan lines is illustrated.

See FIG. In accordance with the principles of the present invention, another isometric view of another embodiment of a multi-beam group electron gun 190 for a color CRT is shown, partially in perspective. FIG. 14 is a vertical vertical cross-sectional view of the multi-beam group electron gun 190 shown in FIG. 13 taken along installation line 14-14. As in the case of the electron gun 50 shown in FIG. 4 described above, the electron gun 190 shown in FIGS. 13 and 14 is a dipole type electron gun. However, in the electron gun 190, not only two electron beam groups having a constant spacing in the vertical direction of each primary color, but also three electron beams having a constant spacing in the vertical direction of each of the red, green, and blue primary colors are provided. Aim at the CRT screen. The electron gun 190 is G
Three in-line cathodes 192, 19 each directing a number of active electrons in the direction of one control grid 198
Includes 4 and 196. G1 control grid 198
Is a beam forming area (BFR) 2 that forms active electrons into nine beams in combination with the G2 screen grid 200.
16 in which the central vertically aligned electron beam is directed to components 184g, 186g, and 18
It is displayed in Figure 14 as 8g. The electron gun 190 further includes a G3 grid 202 and a G4 grid 204, which combination forms a high voltage focus lens 218 to accelerate the electrons towards the CRT screen 61 and the CRT.
Focus the electron beam on the screen 61. G2 screen grid 200 is connected to V _G2 voltage source 210, while G3 grid 202 and G4 grid 204 are connected to V _G3 voltage source 212 and V _G4 voltage source 214, respectively. The G1 control grid 198 is connected to multiple video sources, as described below.

In accordance with this embodiment of the invention, each of the three horizontally aligned top, bottom, middle electron beam trios, as shown in the elevation view of the screen of FIG. It will be focused. As shown in the upper left hand corner of screen 61, the three vertically aligned spots formed by the focused and horizontally aligned primary color electron beams are reflected by the means of a magnetic deflection yoke (not shown) of a CRT. Is displaced to the right along each horizontal scan line on the screen, that is, in the direction of the arrow. The nine electron beams forming the three vertically aligned spots on the screen 61 are traced over the last three horizontal scan lines, as shown by the dotted lines in the lower left part of the screen 61 in FIG. It is displaced in a raster shape until After the bottom row horizontal scan line has been tracked by the electron beam, the beam is deflected upwards to start tracing the top row of horizontal scan lines again. By displaying a plurality of video images simultaneously on three adjacent scan lines, it is possible to reduce the beam scanning frequency while maintaining the same frame time for each full scan of the video image on the screen 61. Become. As the horizontal scanning frequency decreases, increasing the electron beam dwell time on the screen decreases the electron density of individual beams, while the relative increase in beam dwell time reduces the beam spot size and It enables you to maintain high resolution and brightness of video images.

Please refer to FIG. This is according to the invention
A partial cross-sectional view of a color CRT 118 embodying a multi-beam group electron gun 190. The CRT 118 includes a glass envelope consisting of a cylindrical neck portion 120a and a funnel portion 120b of increasing diameter. The CRT 118 further includes a CRT neck portion 120a.
Includes multiple stem pins 122 that extend through the end of the. Funnel portion 120 of CRT glass envelope 120
Located inside b is a conductive coating 126, which is connected to an anode voltage source (not shown). The G4 grid 204 includes a plurality of electrically conductive locating spacers 128 and 130 with a constant spacing.
It is connected to the internal conductive film 125 by means of and is charged to the anode voltage (V _A ). Magnetic deflection yoke 124
Is placed around the funnel portion 120b of the CRT and deflects it in a raster pattern on the screen 61 of the electron beam. As shown in the cross-sectional view of FIG. 19, three central vertically aligned electron beams 178g, 180g, and 182g.
Are projected vertically on the CRT screen 61 at regular intervals. This allows each of these three electron beams, as well as the other two pairs of beams outside of these central beams, to track their respective adjacent horizontal scan lines during each scan of screen 61. It will be possible.

Arranged around the CRT 118 approximately in the middle of the electron gun 190 and the magnetic deflection yoke 124 is one of the first and second multipole magnetic alignment devices.
32 and 134. The first magnetic alignment device 132 is composed of a dipole magnet (dipole) 132a, a quadrupole magnet (or quad) 132b, and a hexapole magnet 132c. Second multi-pole magnetic alignment device 134
Consists of a quadrupole magnet 134a and a hexapole magnet 134b. Each of the above magnets contains two closely-spaced, flat, disk-shaped pole pieces. For simplicity, the figure shows only one flat disk for each magnetic alignment device. The first multi-pole magnetic alignment device 132 is arranged in the first rotary mount 136 and the second multi-pole magnetic alignment device 134 is arranged in the second rotary mount 13.
It is located at 8. First and second rotary mounting 13
6 and 138 CR the magnet attached to it
The magnet pole pieces may be rotationally arranged around the T envelope 120, and the magnetic pole pieces of each magnet are rotatable relative to each other to adjust the magnetic field strength, as described below for aligning the electron beam. Can be installed in Each magnet also includes a tap device to quickly and easily increase or decrease the magnetic field strength of dipole, quadrupole, and hexapole magnets.
Such devices for adjusting the magnetic field strength in a CRT to align the electron beam are well known to those skilled in the art and will not be described further here.

20, 21a and 21b, 22a and 22b
See Two-pole magnet 132a and four-pole magnet 132, respectively
It is an elevation view of b and the sextupole magnet 132c. The long arrows in the magnet represent the magnetic field lines and the short arrows represent the force exerted by the magnet on the electron beam passing through the magnet.
Magnets 132a, 132b, and 132c can maintain the various electron beams in proper alignment using conventional methods well known to those skilled in the art. When aligning the electron beams, turn off the horizontal two rows of electron beams and align the third row of beams with the magnets of the first magnetic alignment device. This alignment process is performed separately for each of the three horizontal rows of electron beams. Once the beams in each horizontal row of electron beams are aligned, the magnet means of the second magnetic alignment device 134 provide a vertical constant spacing between adjacent rows of electron beams. See FIG. An embodiment of a quadrupole multi-beam group electron gun 220 is illustrated in accordance with another alternative embodiment of the present invention. Shown in FIG. 17 is a longitudinal cross-sectional view of the multi-beam group electron gun 220 taken along installation line 17-17 in FIG. The electron gun 220 has three cathodes 22 arranged in a line at regular intervals.
These cathodes, including 2, 224, and 226, direct the energetic electrons toward the G1 control grid 228. G
1 Control grid 228 and G2 screen grid 230 jointly form a beam forming area (BFR) 241. The beam forming region (BFR) is composed of 9 electron beams 240 (illustrated by dotted lines), each of which is composed of 3 groups of active electrons, each of which has three vertically aligned electron beams at regular intervals. To form. Therefore, G1 control grid 2
The 28 and G2 screen grids 230 each include nine pairs of apertures in each of the two aligned grids for passing nine electron beams. The electron gun 220 further includes a G3 grid 232 and a G4 grid 2
34, G5 grid 236, and G6 grid 238
CRT screen 2 including a high voltage focusing lens 242 consisting of accelerating the electron beam and having a phosphorus coating 246 on the inner surface thereof.
Focus on the screen toward 44. G2 screen grid 230 and G4 grid 234 are connected to V _G2 voltage source 248, while G3 grid 232 and G5 grid 236 are connected to focal voltage (V _F ) source 250. The G6 grid 238 is connected to the accelerating voltage (V _A ) source 252.

See FIG. This is the G according to the invention.
1 is an elevation view of the control grid 228. The G1 control grid 228 for the electron gun 220 and the connection of various signals thereto are the same as the G1 control grid 19 of the electron gun 190 described above.
8 and the connections to it are essentially the same. The surface of the G1 control grid 228 has three cathodes 222, 224,
And 226, shown in dotted lines 228 coined or embossed at three regular intervals.
Includes a, 228b, and 228c. Disposed within the first coined section 228a are three vertically aligned openings 280b, 282b, and 284b illustrated in FIG. Similarly, the central coined portion 228b also has three vertically aligned openings 280g, 282g, and 284.
Including g. Finally, the third coined portion 22
8c has three openings 280r, 28 aligned vertically.
Includes 2r and 284r. The first three vertically aligned apertures pass an electron beam that provides blue, and the second and third groups of vertically aligned apertures pass an electron beam that provides green and red, respectively. . The G1 control grid 228 is composed of a non-conductive ceramic substrate 260, and on the surface facing the G2 screen grid 230, a plurality of thin conductive elements surrounds each beam passage aperture. Each of these conductive elements is connected to a respective video signal source and modulates the electron beam passing through its associated aperture.
Thus, the upper row of beam passage openings 280b, 280
g and 280r are ceramic substrates 260, respectively.
It is located on the conductive parts 262, 264, and 266 on the surface of the. Similarly, the lower row of beam passage apertures 284
b, 284g, and 284r are conductive portions 2 respectively.
It is located in each one of 69, 271, and 273. Finally, the central row of beam passage openings 282b,
282g and 282r are conductive portions 27, respectively.
It is located at 5, 277, and 279. The conductive part is formed by soldering a thin metal layer on the surface of the ceramic substrate 260 or by a method such as clamping. The portions of the metal layer thus attached are removed by conventional means such as chemical etching to form the discrete discrete conductive portions shown in the figure. Insulation gaps are thus formed between adjacent pairs of conductive parts to electrically isolate them from each other. Each of the above conductive parts has essentially the same surface area, thus providing essentially equivalent capacitance to each conductive part.

As shown in FIG. 18, each of the aforementioned conductive parts is connected to and excited by a respective video signal source. Thus, the top row of conductive portions 262, 264, and 266, respectively, are
V _1AB , V _1AG , and V _{1A R} video signal sources 286, 2
It is connected to 88 and 290. Similarly, the bottom row of conductive portions 269, 271, and 273, respectively,
V _1CB, V _1CG, and V _1CR video signal source 298,3
It is connected to one each of 00 and 302. Finally, the middle or central conductive portion 275, 27
7 and 279 are respectively connected to one of V _1BB , V _1BG and V _1GR video sources 292, 294 and 296 respectively. 1 for each conductive part
By virtue of each beam passage aperture located in and through one of the two ranges, the variation of the video signal provided to each of the conductive portions is changed by the electron passing through each aperture according to the video image displayed on the screen. Allows you to modulate the beam. In this way, the G1 control grid 228 shown in Figure 18 can modulate nine electron beams according to nine separate video signals. Each of the above video signal sources includes its own video store. _{Therefore, V 1AB, V 1AG, V} 1AR video signal sources 286,288,290, respectively, includes video storage 286a, 288a, and 290a. Similarly, V _1BB , V _{1B G} , and V _1BR video signal sources 29
2, 294, and 296 are video storage 292, respectively.
a, 294a, and 296a. Finally, V
_1CB, V _1CG, and V _1CR video signal source 298,30
0 and 302 are video stores 298a, 3 respectively.
Includes 00a and 302a. Each video memory is
It is used to store video image data and then write it to each one of the conductive parts of the G1 grid controlling each one of the electron beams passing through the aperture in the G1 grid. By temporarily storing the data in the video store, it is possible to read the data out of the store and provide it to the conductive part of the G1 grid, so that the top 3 electron beams, the middle 3 electron beams, and The three electron beams in the bottom row can contain video data for adjacent scan lines that form an image on the screen. For example, the video information in a television signal received for three electron beams in the top row is stored in memory longer than the time the video data provided to the two electron beams in the bottom row is stored in each storage. Will be saved. The reason is that the entire electron beam tracks a portion of a video image at the same time, with the top three beams of data received earlier than the others.

See FIG. 23. FIG. 8 is a rear elevational view of another embodiment of the G1 control grid 261 used in the present invention.
FIG. 24 illustrates the G1 illustrated in FIG.
It is a cross-sectional view along the installation line 24-24 of the control grid 261. The G1 control grid 261 is an opening matrix 3x3 represented by a dotted line, and the upper row openings 260a and 260 are provided.
b, 260c, middle row openings 260d, 260e, 260
f, Includes lower row openings 260g, 260h, 260i. Adjacent to the back of each of the aforementioned openings is its respective cathode. Therefore, the upper row of cathodes 26
2b, 262g, and 262r have openings 260a and 260.
It is located adjacent to the rear of b and 260c. Similarly, the middle row of cathodes 264b, 26
4g and 264r have openings 260d, 260e and 260f.
It is located adjacent to and behind. Finally, the lower rows of cathodes 266b, 266g, 266r are provided with openings 260
It is located adjacent to the rear of g, 260h, and 260i. The G1 control grid 261 includes a generally flat end wall 261b with an open matrix, and side walls 261a extend around the end wall. End wall 26
It is an insulating ceramic substrate 263 that is located inside 1b and that contains multiple apertures at regular intervals to receive and support each cathode. G1 control grid 26
1 is preferably made of a conductive metal and has a V _G1 voltage source 28
Biased by 6 is preferred. Each cathode, when heated, produces a large number of active electrons, which are directed through adjacent apertures in the G1 control grid 261. In this way, the nine electron beams arranged in a 3 × 3 matrix at regular intervals are formed by the G1 control grid 261, and are not shown in the figure for simplification. Will be directed to.

Each cathode is connected to a respective video signal source, which energizes it. Thus, the top row of cathodes 262b, 262g, and 262r are connected to V _KAB , V _KAG , and V _KAR video sources 268, 270, and 272, respectively. Similarly, middle row cathodes 264b, 264g, and 264r.
Are connected to V _KBB , V _KBG , and V _KBR video sources 274, 276, and 278, respectively.
Finally, the bottom row of cathodes 266b, 266g, 266r are V _KCB , V _KCG , V _KCR video signal sources 280, respectively.
It is connected to 282,284. Each video source sends a modulating signal to its associated cathode, which controls the electrons emitted by the cathode, so that the electron beam forms a video image. Each video signal source contains its own memory for storing the video data read from the video memory and provided to the associated cathode.
Therefore, V _KAB , V _KAG , and V _KAR video signal sources 2
68, 270, and 272 are respectively video storage 2
Includes 68a, 270a, and 272a.
V _KBB , V _KBG , and V _KBR video sources 274, 2
76 and 278 are video stores 274a and 274a, respectively.
Includes 276a and 278a. Finally,
V _KCB , V _KCG , and V _KCR video sources 280, 2
82 and 284 are video stores 280a, 280a, respectively.
Includes 282a and 284a. Video storage allows video signal sources associated with different horizontal scan lines to temporarily store video data, such as received television signals, for later recall and simultaneous display with video data associated with adjacent scan lines. It will be possible.

See FIGS. 25 and 26. There, a G for use in an electron gun according to another embodiment of the invention is used.
Elevations of the dual screen grid 310 and the G1 control grid 323 are displayed. G1 control grid 323
Both the G2 and the G2 screen grid 310 are generally flat and have three pairs of vertically aligned apertures, though not shown in the figure for simplicity, that allow the passage of six electron beams. The G1 control grid 323 has first, second, and third coined or embossed portions 344, 346, and 348 facing the electron gun cathode, also not shown for simplicity. It is composed of a non-conductive ceramic substrate. Within the first coined section 344 is a pair of vertically aligned openings 338b and 340b. Similarly, disposed within the second and third coined portions 346 and 348, respectively, and penetrating the ceramic substrate of the G1 control grid 323 is:
Second and third vertically aligned openings 338g and 3
40g, and 338r and 340r. Opening 338b
And 340b pass a pair of blue electron beams, apertures 338g and 334g pass a pair of green electron beams, and apertures 338r and 340r pass a pair of red electron beams. In this way, the upper row opening trio 3
38b, 338g, and 338r pass the three electron beams that produce the primary colors, while lower row aperture trio 3
Similarly, 40b, 340g, and 340r also pass the electron beam that forms the primary color on the screen.

The G1 control grid 323 further includes six thin conductive portions 32 on the surface facing the G2 screen grid 310.
Includes 4, 326, 328, 330, 332, and 334. The conductive part is formed by mounting a thin conductive metal layer on the ceramic substrate of the G1 control grid by soldering or clamping. A portion of the conductive layer is then removed by conventional methods such as chemical etching to form a continuous non-conductive insulating gap 336 that separates the various conductive parts. The insulating gap 336 exposes the underlying ceramic substrate and allows the six conductive portions 324, 326,
Define 328, 330, 332, and 334.
Each of these conductive portions is associated with a beam passage aperture 338b, 338g, 338r, 340b, 340 of the G1 control grid.
Each of g and 340r is individually modulated by the respective video signal provided to each of the conductive parts described above to enclose each one. Special Figure 25
See The G2 screen grid 310 is also the first, second,
And a third horizontally aligned coined or embossed portion 318, 320, or 322. The first, second, and third coined sections 318, 320, and 322 face the G3 grid of the electron gun, although not shown for simplicity. The first coined portion 318 has first and second vertically aligned beam passage openings 312b.
And 314b are included. Similarly, the second and third coined portions 320 and 322, respectively, are vertically aligned first and second paired beam passage apertures 312g and 3, respectively.
Includes 14g, and 312r and 314r. Opening 3
12b and 314b are aligned with apertures 338b and 340b in the G1 control grid 323, respectively, and allow the blue electron beam to pass through. The openings 312g and 314g are G
The green electron beam is made to pass through by aligning with each of the openings 338g and 340g in the control grid 323. Finally, the openings 312r and 314r are used for the G1 control grid 3
Align the openings 338r and 340r in 23 with the red electron beam.

In accordance with this aspect of the invention, the horizontal spacing between adjacent vertically aligned beam passage apertures is
It is displayed by the distance S _H. Therefore, the openings 312b and 314b and the openings 312g and 314 that are vertically aligned are formed.
The horizontal distance from g is S _H. Similarly, the horizontal distance between the openings 312g and 314g and the openings 312r and 314r is S _H. The vertical spacing between adjacent vertically aligned openings is indicated by the distance S _V. Therefore, the openings 312b and 314b and the opening 31
The vertical distance between 2g and 314g is S _V.
Similar vertical and horizontal spacing distances are provided between adjacent beam passage apertures in the G1 control grid 323, as illustrated in FIG. 25 and 2
6, the horizontal spacing between the outer two pairs of vertically aligned apertures, ie, apertures 312b and 314b and apertures 312 in the G2 screen grid 310.
horizontal spacing between the r · 314R, and the openings 338b · 340b in the G1 control grid 323 and the opening 338R · 340R is displayed by the distance 2S _H. G1 control grid 323 and G2 screen grid 3
In selected embodiments of 10, or between the S _V is 1/20 and 1/2 S _H, or with _{1/20 S H ≦ S H ≦ 1} /2 S H, where, S _H = horizontal direction Beam centerline to beam centerline spacing along, and _SV = Beam centerline to beam centerline spacing along the vertical direction.

See FIGS. 27 and 28. Shown are elevation views of a G2 screen grid 354 and a G1 control grid 380 for use in an electron gun according to another embodiment of the present invention. G2 screen grid 354 includes first, second, and third horizontally aligned coined portions 362, 364, and 366. Located within the first coined portion 362 is three vertically aligned beam passage apertures 365.
b, 358b, and 3360b. Similarly, disposed within the second and third coined portions 364 and 366, respectively, are vertically aligned openings 356g, 358g, 360g, and openings 35.
6r / 358r / 360r. The opening 356g · 358g · 360g of the three center vertically aligned, the horizontal spacing between the apertures 2 pairs aligned on the outside of the vertical direction, are displayed in the distance S _H. An opening 356b · 358b · 360b vertically aligned, the horizontal spacing between the apertures 356r · 358r · 360r vertically aligned, is displayed by the distance 2S _H. The vertical spacing between adjacent beam passage apertures within each vertically aligned coined section is indicated by the distance S _V. The vertical spacing between the upper and lower beam passage apertures within each of the three coined areas is displayed at a distance of 2S _V.

In FIG. 28, the G1 control grid 380 is displayed. It is a non-conductive ceramic substrate 38.
It consists of 1. On its substrate surface, facing the G2 screen grid, are a plurality of thin conductive elements 382, 38.
4, 386, 388, 390, 392, 394, 39
6 and 398, each enclosing one beam passage aperture. The beam passage apertures are arranged in a matrix array and have three groups of vertically aligned apertures in a horizontal row: first, second and third aperture trios 406b, 408b, 410b, 40b.
6g, 408g, 410g, and 406r, 408r
-Includes 410r. Each conductive element is connected to a respective video signal and modulates the electron beam passing through the associated aperture described above. Thus, the upper row of beam passage apertures 406b, 406g, and 406r are located within the conductive portions 383, 384, and 386, respectively. Similarly, each of the beam openings 410b, 4b in the lower row is
10g and 410r are conductive portions 394,
It is located at 396 and 398. Finally, the middle row of electron beam passage openings 408b, 408g, and 4
08r is located within the conductive areas 388, 390, and 392, respectively. Each of the conductive parts mentioned above is basically the same in surface area, in order to provide essentially the same capacitance to each conductive part. As mentioned earlier, the insulation gap separates each conductive part.

As in the case of the G2 screen grid 310 shown in FIG. 25 and described above, the horizontal spacing between adjacent vertically aligned beam passage apertures is, in the G1 control grid 380, the distance. It is displayed as S _H. Accordingly, the distance between the two beams passing apertures arranged aligned on the outside of the vertical direction, the G1 control grid 380, are displayed at a distance 2S _H. Similarly, the vertical spacing between adjacent apertures within each of the three vertically aligned aperture groups is displayed as the distance S _V. Within each trio of vertically aligned beam passage apertures, the spacing between the upper and lower row beam passage apertures is shown as the distance 2S _V. G1 control grid 38 of selected embodiment
0 and G2 screen grid 354 have S _V of 1/20 and 1
/ 2 or 1/20 S _H ≤S _V ≤1 / 2 S _H where S _H = the distance from the beam centerline to the beam centerline along the horizontal direction, and S _V = The distance from the beam centerline to the beam centerline along the vertical direction.

While particular embodiments of the present invention have been shown and described, it will be obvious to those skilled in the art that changes and modifications can be made without departing from the basics of the invention. Will Therefore, the purpose of the appended claims is to cover all such changes and modifications that fall within the spirit and scope of the invention. The preceding description and accompanying drawings are presented by way of illustration only and not as a limitation. The true scope of the invention is defined as the claims when considered in comparison with the prior art.

[0035]

EFFECT OF THE INVENTION What has been illustrated so far is the color C.
A multi-beam electron gun for RT. It contains multiple vertically aligned electron beams horizontally aligned, which form a matrix of spots on the screen of a CRT. Each horizontal beam array is red, green,
It provides the three primary colors of blue and is focused on a common spot on the screen. A vertically aligned, aligned beam array tracks adjacent horizontal scan lines on a CRT screen. All beams are deflected in synchronism across the screen. Each array in the beam is modulated according to that portion of the video image that the beam forms. As a result, adjacent vertically-spaced arrays can write different video image information to the screen when simultaneously forming adjacent portions of the video image. The multi-beam electron gun may be an older version used in color CRTs such as bipolar or quadrupole electron guns. The electron beam is modulated by providing a video signal to each of a plurality of conductive portions including a beam passage aperture in the G1 control grid, or G
It can be modulated by two separate cathodes aligned with each aperture in one control grid. Providing video information on more than one horizontal scan line simultaneously can reduce the horizontal scan frequency and associated magnetic deflection yoke operating criteria. Decreasing the electron beam scan rate also increases the beam dwell time on the phosphor layer of the screen, which can reduce the beam current density without sacrificing the brightness of the video image, while Improves resolution. In selected embodiments, the horizontal spacing between the vertically aligned arrays of beam passage apertures in the G1 control grid and the G2 screen grid is displayed at a distance S _H and is also vertically aligned. The vertical spacing between the beam passage apertures is indicated by the distance S _V. In addition, S _V is 20 of S _H
Min 1 (1/20) or between one-half (1/2), or is _{1/20 S H ≦ S V ≦ 1} /2 S H.

[Brief description of drawings]

FIG. 1 is a simplified isometric view of a conventional multiple-beam in-line electron gun used in a conventional color CRT, partially shown in a local perspective view.

2 is a longitudinal sectional view of the electron gun shown in FIG. 1 taken along installation line 2-2.

FIG. 3 is a simplified elevational view of a CRT screen showing how the screen is swept in a raster by the electron beam of the electron gun of FIGS. 1 and 2 when forming a color beam image on the screen. I will.

FIG. 4 is a color CRT according to one embodiment of the present invention.
A simplified isometric view of the multi-beam group electron gun used in Figure 3, with a partial perspective view.

FIG. 5 is a generally vertical longitudinal section view of the multi-beam group electron gun of the present invention illustrated in FIG. 4 taken along installation line 5-5.

FIG. 6 is a simplified elevation view of a CRT screen, illustrating how the screen is swept by the multiple electron beams of the electron guns of FIGS. 4 and 5 in accordance with the present invention.

FIG. 7 is an elevation view of the G1 control grid of the electron gun shown in FIG. Also, according to one embodiment of the present invention, G
1 The video signal exciter connected to the control grid is shown in a simplified block diagram.

FIG. 8 is a partially enlarged view of the G1 control grid illustrated in FIG. 7.

FIG. 9 is a partial cross-sectional view of the G2 screen grid of the electron gun of FIG. 4, showing how two electron beams pass through it at regular intervals in the vertical direction.

FIG. 10 is a partial vertical cross-sectional view of a color CRT embodying the multi-beam group electron gun illustrated in FIG. 4 in accordance with the present invention.

FIG. 11 is another simplified isometric view of another multi-beam group electron gun for a color CRT, in partial perspective, in accordance with the principles of the present invention.

12 is an installation line 12- of the electron gun shown in FIG.
A generally vertical longitudinal section along 12.

FIG. 13 is a simplified isometric view, partially shown in partial perspective, of another embodiment of a multi-beam group electron gun in accordance with the principles of the present invention.

14 is an installation line 14- of the electron gun shown in FIG.
A generally vertical longitudinal section along line 14.

FIG. 15 is a simplified elevational view of a CRT screen, in which a color video image is formed according to another embodiment of the present invention. The figure shows how multiple electron beams aligned on the screen sweep the screen.

FIG. 16 illustrates a color C according to yet another embodiment of the present invention.
A simplified isometric perspective view of a partial view of a multi-beam group electron gun for RT.

17 is an installation line 17- of the electron gun shown in FIG.
A generally vertical cross-section along line 17.

18 is an elevational view of the G1 control grid of the electron gun shown in FIG. It also illustrates a simplified block diagram of a video exciter connected to the G1 control grid.

19 is a vertical cross-sectional view of a portion of a color CRT embodying the multi-beam group electron gun illustrated in FIG. 13 in accordance with the present invention.

FIG. 20 is a plan view of FIG. 19 for aligning six electron beams.
It is a simplified drawing of the dipole magnet used in the magnetic focusing device of the CRT shown in Figure.

FIG. 21 is a simplified drawing of a quadrupole magnet in the CRT magnetic focusing device shown in FIG. 19 for aligning six electron beams a and b.

22 is a simplified drawing of a hexapole magnet in the CRT magnetic focusing device shown in FIG. 19 for aligning six electron beams in both a and b.

FIG. 23 is another rear elevation view of the multiple cathode and G1 control grid combination of the present invention, showing each cathode connected to a respective video source.

FIG. 24 is a longitudinal cross-sectional view of the combination of cathode and G1 control grid shown in FIG. 22, taken along installation line 24-24.

FIG. 25 is an elevation view of a G2 screen grid according to an embodiment of the present invention.

FIG. 26 is an elevation view of a G1 control grid according to an embodiment of the present invention.

FIG. 27 is an elevation view of a G2 screen grid according to another embodiment of the present invention.

FIG. 28 is an elevation view of a G1 control grid according to another embodiment of the present invention.

[Explanation of symbols]

 60 multi-beam electron gun 62, 64, 66 in-line cathode 68 beam forming region (BFR) 70 high voltage focusing lens 72 three pairs of vertically aligned (6) electron beam 74 G1 control grid 76 G2 control grid 76a Internal pressure-applied part 76b Internal coined or embossed part 76c Internal coined part 78 G3 control grid 78a Number 8 shaped openings with regular spacing 78b Number 8 shaped apertures with regular spacing 78c Number 8 shaped openings with a constant spacing 78d Elliptical openings with a regular spacing inside 78e Elliptical openings with a regular spacing inside 78f Elliptical openings with a regular spacing inside 78g Horizontally aligned and expanded chains Shape common opening 80 G4 grid 80a Horizontally aligned chain-shaped opening 80b O Elliptical opening 80c Elliptical opening with a constant space inside 80d Elliptical opening with a constant space inside 82 First coined or embossed part 84 Second coined or embossed part 86 Third coined or embossed portion 92 Thin upper row conductive portion 94 Thin upper row conductive portion 96 Thin upper row conductive portion 98 Thin lower row conductive portion 103 (G1 control grid) Non-conductive insulating gap

Claims (23)

[Claims] 1. A multi-beam color cathode ray tube (CRT).
The electron guns arranged in a row include a screen, and a plurality of horizontally arranged electron beams are swept on the screen in the vertical direction at regular intervals on a plurality of scanning lines in a raster pattern. By this, a video image is formed, and
Each electron beam provides one of the red, green, or blue primary colors of the video image to the screen and the electron gun consists of the following components: Cathode means for providing active electrons; Adjacent to the cathode means. Beam forming area (BF)
R); which has first and second regularly energized grids for forming active electrons into multiple beams, with each grid forming active electrons into multiple beams There are first and second aperture arrays with constant spacing, and the first and second aperture arrays of each grid have three primary colors of red, green, and blue on the horizontal scan lines in the upper and lower rows, respectively. To pass the horizontally aligned electron beams to provide a horizontal array of upper row openings and lower row openings, and the first and second array of openings in each grid are further , Are vertically aligned and grouped, in order to form electron beams grouped in the vertical direction with electron beams in each vertical group that provide one of the primary colors on each horizontal scan line. There, and there Vertical spacing between the openings in the upper row and lower row are displayed in S _V, the opening group aligned vertically are displayed S _H, is _{1/20 S H ≦ S V} ≦ 1/2 S H, the lens Means; which is arranged in the middle of the beam forming area (BFR) and the screen of the CRT to focus the electron beam on the screen; and focusing means, which is arranged in the middle of the lens means and the screen. The electron beam is focused on the upper and lower spots of the screen, and the upper and lower spots of the screen are swept on the adjacent upper and lower horizontal scan lines, respectively. 2. The first and second aperture arrays of the electron gun are arranged in a line in the vertical direction, and are arranged in the first and second vertical directions for each of the three primary colors of red, green and blue. 2. The electron gun of claim 1, including three pairs of apertures grouped together to pass an aligned electron beam. 3. The electron gun of claim 2, wherein the first grid of the electron gun includes first and second energized portions aligned in a horizontal direction at regular intervals in a vertical direction. One grid. Each part contains each opening of the first array of openings and has essentially the same capacitance. 4. The electron gun of claim 3, wherein the first grid in the electron gun further comprises a non-conducting portion disposed intermediate the plurality of energized portions. 5. The electron gun of claim 4, wherein the energized portion of the electron gun comprises a metal and the non-conductive portion includes means for defining a gap between adjacent conductive portions. 6. The electron gun further comprises a first plurality, each connected to a respective one of the first energized portions of the first grid to provide a corresponding video signal to the grid. 6. The electron gun of claim 5, comprising a video signal source, and a second plurality of video signal sources each connected to each one of the second energized portions of the first grid. 7. The first and second plurality of video signal sources of the electron gun each include storage means for storing a received video signal for later display on the screen by the electron beam. Item 6 electron gun. 8. The electron gun lens means includes at least third and fourth energized grids, at least one of the third and fourth grids passing a common color electron beam. 8. The electron gun of claim 7 including a vertically expanded and horizontally aligned aperture for allowing the light to travel. 9. The electron gun of claim 8, wherein the first and second energized grids of the electron gun are a G1 control grid and a G2 screen grid, respectively. 10. The electron gun of claim 9, wherein the third and fourth energized grids of the electron gun are a G3 grid and a G4 grid, respectively. 11. The electron gun is a bipolar electron gun.
The electron gun according to claim 10. 12. The electron gun of claim 10, wherein the electron gun is a quadrupole electron gun. 13. Multi-beam color cathode ray tube (CRT)
A row of electron guns for use in a screen includes a screen, and sweeps a plurality of horizontal horizontal scanning lines at regular intervals along a horizontal scanning line in a raster pattern. A video image is formed on the screen, where each electron beam provides one of the red, green, and blue primary colors of the video image. The electron gun is composed of: A cathode means for providing electrons; a beam forming zone (BFR); including a energized grid disposed adjacent to the cathode means and having a first and a second constant spacing, each grid comprising: First and second aperture arrays with a constant spacing are formed to form active electrons into a plurality of beams, wherein each of the first and second aperture arrays is in the upper, middle, and lower horizontal directions. Includes aligned openings A horizontally aligned electron beam is passed through to provide each of the plane scan lines with the three primary colors red, green and blue, wherein the first and second aperture arrays are further arranged on respective horizontal scan lines. Are grouped vertically to form vertically grouped electrons in an electron beam in each vertical group that provides one of the primary colors to the upper, middle, and lower apertures. 's vertical interval is expressed by S _V, the horizontal spacing between apertures group vertically aligned, is displayed in S _H, is _{1/20 S H ≦ S V} ≦ 1/2 S H , Lens means; which comprises the beam forming region (BFR) and CR
T is arranged in the middle of the screen to focus the electron beam on the screen, and focusing means; which is arranged in the middle of the lens means and the screen, and places the electron beam on the screen in upper and lower spots. , And the upper and lower spots of the screen are swept on adjacent upper and lower row scan lines, respectively. 14. A G1 grid for a color cathode ray tube (CRT) is adopted to receive active electrons from a cathode and form the active electrons into a plurality of electron beams, the electron beams being used for the screen. When creating a picture image on top of the CR
Swept horizontally over a plurality of scan lines in a raster across the screen of T, the grid consisting of: a first, a second, and a third horizontally aligned top row each. A conductive portion; which is employed to connect to a corresponding first video signal source; a first, a second, and a third horizontally aligned bottom row of respective conductive portions; which have a corresponding second portion Insulation means arranged to connect to a video signal source, arranged in the middle of the adjacent conductive parts; this being for electrically isolating the conductive parts; first, second and third Means for defining horizontally aligned top row apertures; each top row aperture is located within a respective one of the top row conductive portions, and each top row aperture is a video image of a screen. Corresponding corresponding top row forming one of the red, green and blue primaries of The electron beam is passed therethrough, and the upper row electron beam is swept horizontally on the screen over the first upper row scan line, and the first, second, and third horizontally aligned lower row apertures are also provided. Respectively located within a respective one of the lower row conductive portions, wherein each of the lower row openings forms one of the red, green and blue primaries of the video image of the screen. Pass each bottom row electron beam,
Further, the lower row electron beam is swept in the horizontal direction on the second adjacent lower row scan line, and the pair of openings of the first, second, and third upper and lower rows are aligned in the horizontal direction. And pass an electron beam that forms the same primary color on the screen, where the vertical spacing between each opening in the upper row and the lower row is denoted S _V , and the vertically aligned openings are The group is indicated by S _H , and 1/20 S _H ≤S _V ≤
It is a 1/2 S _H. 15. The grid of claim 14, wherein the grid includes a first open end including the electrically conductive portion and the insulating means and a second opposite closed end. 16. The grid of claim 15, wherein the upper and lower openings of the grid are separated by a center-to-center spacing of 50 mils. 17. The grid of claim 16, wherein the openings above and below the grid are separated by a center-to-center spacing of 50 mils. 18. The grid of claim 14, wherein the conductive portions above and below the grid have essentially the same capacitance. 19. The grid of claim 18, wherein each of the conductive portions of the grid is composed of metal. 20. The grid of claim 19, wherein the insulating portion of the grid includes means for defining an insulating gap between adjacent conductive portions. 21. The grid of claim 20, wherein the grid comprises a ceramic substrate having upper and lower rows of soldered metallic conductive portions. 22. The grid of claim 20, wherein the grid comprises a ceramic substrate having clamped upper and lower metallic conductive portions. 23. The grid of claim 20, wherein the insulating means of the grid is formed by etching the upper and lower conductive portions.