JPS59132547A - Picture display device - Google Patents

Abstract

PURPOSE:To divide a large number of pairs of horizontal deflection electrodes, which are set up so as to put a passage of an electron beam between every horizontal section, into (n) groups while adding independently a horizontal deflection signal every group of divided horizontal deflection electrodes for making it possible to correct the horizontal deflection every group. CONSTITUTION:A rear electrode 1, a line cathode 2, vertical focusing electrodes 3 and 3', a vertical deflection electrode 4, a beam stream control electrode 5, a horizontal focusing electrode 6, a horizontal deflection electrode 7, a beam acceleration electrode 8 and a screen 9 are arranged. A phosphor 20 is applied to the screen 9 while the phosphor 20 is provided with two pairs of tricolor phosphors in R, G, B for every one slit 14 of the electrode 5 in a row. The electrode 7 has electrodes 18 and 18' for every section so as to put the passage of the electron beam between while horizontal deflection voltage is impressed on the electrodes 18 and 18' for irradiating the phosphors in R, G, B by turns in order to make them to radiate. The electrodes 18 and 18' are divided into two while the horizontal deflection electrodes 18a and 18a' and the horizontal deflection electrodes 18b and 18b' are provided independently thus making it possible to correct horizontal deflection of every group by impressing independent horizontal deflection voltage.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention generates an electron beam for each division when a screen on a screen is vertically divided into a plurality of divisions, and generates an electron beam for each division. The present invention relates to an apparatus for displaying a plurality of lines by vertically deflecting a beam to display a television image as a whole.

Conventional configurations and their problems Traditionally, cathode ray tubes have been mainly used as display elements for displaying color television images, but conventional cathode ray tubes are extremely long and thin compared to the screen thickness. It was impossible to create a shaped television receiver. Recently, EL display elements, plasma display devices, liquid crystal display elements, etc. have been developed as flat display elements, but all of them have low brightness. , contrast, color display, etc., and K has not yet been put into practical use.

Therefore, in order to achieve a flat display device using electron beams, the present applicant filed Japanese Patent Application No. 56-20618 (
A novel display device was proposed in Japanese Patent Application Laid-Open No. 58-135590.

This method generates an electron beam for each section when the screen is divided vertically into multiple sections (C sections), and deflects the electron beam for each section 4'yvC in the vertical direction to generate multiple An example of a basic configuration of an image display element used here will be described with reference to FIG. 1, which displays lines and displays a television image as a whole.

This display element includes, in order from the back to the front, a back electrode 1, a line cathode 2 as a beam source, and vertical focusing electrodes 3, 3'.
, a vertical deflection electrode 4, a beam stream side electrode 5, a horizontal focusing electrode 6, a horizontal deflection electrode 7, a beam acceleration electrode 8, and a screen plate 9. (not shown) is housed inside an evacuated interior.

Line cathode 2il-1 as a beam source: It is stretched in the horizontal direction so as to generate an electron beam distributed linearly in the horizontal direction. (Only 4 pieces from 2i to 22 are shown here)
It is set aside. In this embodiment, it is assumed that 16 pieces are provided. Let's call them 2i~2yo. These wire cathodes 2 are constructed by coating the surface of a tungsten wire with a diameter of 10 to 20 μΦ with an oxide cathode material for thermionic emission. These line cathodes 2A to 2Y are heated to the extent that a thermionic beam can be generated by passing an electric current through them, and as will be described later, the line cathodes 2A and 2A are heated for a certain period of time in order from the line cathode 2I. Controlled to emit an electron beam. The back electrode 1 suppresses the generation of electron beams from other line cathodes 2 other than the line cathode 2 that is polished to emit electron beams for a certain period of time, and directs the generated electron beams only in the forward direction. It has the effect of pushing out toward the target. This back electrode 1 may be formed by a coating of a conductive material attached to the inner surface of the rear wall of the crow bulb. Also, instead of the back electrode 1 and the wire cathode 2, a planar An electron beam emitting cathode may also be used.

The vertical focusing electrode 3 is a conductive plate 11 having a horizontally long slit 10 facing each of the line cathodes 2a to 2yo, and extracts the electron beam emitted from the line cathode 2 through the slit 10, and vertically focus in a direction.

Electron beams for one horizontal line (360 pixels) are taken out at the same time.

In the figure, only one section in the horizontal direction is shown. The slits 10 may be provided with crosspieces at appropriate intervals in the middle, or may be substantially a row of through holes arranged horizontally at small intervals (nearly touching intervals). It may also be configured as a slit. The vertical focusing electrode 3' is also similar.

A plurality of vertical deflection electrodes 4 are arranged horizontally at intermediate positions of the slits 10, and conductors 13, 13' are provided on the upper and lower surfaces of the insulating substrate 12, respectively.
It consists of a set of Then, a vertical deflection voltage is applied between the conductors 13 and 13' facing each other to deflect the electron beam in the vertical direction. In this embodiment, (f-1), a pair of conductors 13 and 13' deflect an electron beam from one line cathode 2 to a position corresponding to 16 lines in the vertical direction. Thus, 15 conductor pairs corresponding to each of the 15 line cathodes 2 are constructed, and the electron beam is ultimately deflected to draw 240 horizontal lines on the screen 9.

Next, the grinding electrodes 5 are each composed of conductive plates 15 having vertically long slits 14, and a plurality of them are arranged in parallel in the horizontal direction with a predetermined interval between them. In this embodiment, 180 conductive plates 15a to 16n for control electrodes are provided (only nine are shown in the figure). Each of the antibacterial electrodes 5 separates the electron beam into two picture elements in the horizontal direction and takes out the electron beam, and controls the amount of the electron beam that passes therethrough according to the video signal that displays each picture element. 1808 conductive plates 16+a to 15n for control electrode 5
If 0 pixels are provided, 360 picture elements corresponding to one horizontal line can be displayed. In addition, in order to display images in color, each picture element is displayed with phosphors of three colors, R, (1, and B), and the valley side electrode 5 has R for two picture elements. , (,; Each video signal of B is added sequentially.

Ushida, 180 conductive plates for electrode 5 151L~1
5n, 180 sets of video signals for one line (two picture elements per set) are simultaneously applied, and one line of video is displayed at one time.

The horizontal focusing electrode 6 is composed of a conductive plate 17 having a plurality of vertically long slits 16 (180 slits 16) facing the slits 14 of the stylus electrode 5, each divided in the horizontal direction. The lightning and child beams of each picture element are focused horizontally into a narrow electron beam.

The horizontal deflection electrode 7td is composed of a plurality of conductive plates 18 and 18' arranged vertically on both sides of each side of the horizontal deflection electrode 7td above.
．． 18' is applied with six levels of horizontal deflection voltage,
The electron beams for each picture element are respectively deflected in the horizontal direction, and two sets of R, (,.

Irradiate each of the phosphors in B sequentially to cause them to emit light). In this embodiment, the deflection range is two picture elements wide for each electron beam.

The accelerating electrode 8 is composed of a plurality of conductive plates 19 provided horizontally at 17 in the same position as the vertical deflection electrode 4, and accelerates the electron beam so that it collides with the screen 9 with sufficient energy.

The screen 9 is constructed by coating the back surface of a glass plate 21 with a phosphor 20 that emits light when irradiated with an electron beam, and additionally, a metal bank layer (not shown) is added thereto.

The phosphor 2o is attached to one of the cape electrodes 5, i.e., to the horizontally divided 4! Two pairs of three-color phosphors, R2G and B, are provided for each 1-1 electron beam, and are coated in stripes in the vertical direction. The broken lines drawn on the screen 9 in FIG. This shows the divisions in the horizontal direction that are displayed corresponding to each of the two pixels. There are phosphors 20 of minutes R, (1,, B), and the width is 16 lines in the vertical direction.The size of one section is, for example, 177 in the horizontal direction and 1 in the vertical direction.
There are 0 birds.

Note that in FIG. 1, for the sake of clarity, the length in the horizontal direction is drawn much thicker than in the vertical direction.

Unfortunately, in this embodiment, only one pair of R, G, and B phosphors 20 for two picture elements are provided for one measuring electrode 5, that is, one electronic beam. There is, but it's mochirun, 1#
The control electrode 5 may be provided with R, G, B11rl! for one picture element or three picture elements or more. :The image signal is 11[+(
Next, a horizontal deflection is applied synchronously with it.

Next, the basic configuration of a drive circuit for displaying television images on this display element will be explained with reference to FIG. 3. First, the driving portion that irradiates the screen 9 with an electron beam to emit raster light will be explained.

The power supply circuit 22 is a circuit for applying a predetermined Iasumi voltage (operating voltage) to each electrode of the display element, -V1 to the back electrode 1 and V5 + V to the vertical focusing electrodes 3 and 3'.
5', v6 for the horizontal focusing electrode 6, and v8 for the accelerating electrode 8.
, a DC voltage of v9 is applied to the screen 9.

Next, a composite video signal of a television signal is applied to the input terminal 23, and a synchronization separation circuit 24 separates and extracts a vertical synchronization signal (2) and a horizontal synchronization signal (H).

Vertical deflection, drive circuit 40, vertical deflection counter 25
．． Memory 27 for vertical deflection signal storage. It is constituted by a digital-to-analog converter 39 (hereinafter referred to as a DA converter). As input pulses of the vertical deflection 1 drive circuit 40, a vertical synchronizing signal V and a horizontal synchronizing signal H shown in FIG. 4 are used. The vertical deflection counter 25 (8 bits) is reset by the vertical synchronizing signal V and counts the horizontal synchronizing signal H. The vertical deflection counter 25 of C is counted during the effective scanning period (here, 2
This count output is supplied to the address of the memory 27. The memory 27 outputs vertical deflection signal data (here, 8 bits) corresponding to each address, and is converted by the DA converter 39 into vertical deflection signals v and v' shown in FIG. In this circuit, there is a memory address for storing vertical deflection signals corresponding to each line for 240H, and by writing certain data into the memory according to the regulations every 16H, A 16-step vertical deflection signal can be obtained.Meanwhile, the line cathode drive circuit 26 creates line cathode drive pulses [I to Y] using the vertical synchronization signal V and the output of the vertical deflection counter 25. . FIG. 5a shows the relationship between the droplet synchronization signal V, the horizontal synchronization signal H, and the lower five bits of the vertical deflection counter 25. Figure 5 shows 16 using each of these signals.
A method of creating one line cathode drive pulse [A' to Y'] for each H will be shown. In FIG. 5, LSB indicates the lowest bit, (L
SB+1) id: LsB, l: 5 means the next most significant bit.

The first pure cathode drive pulse [A'] is the vertical synchronization signal V
and the output (LSB+4) of the vertical deflection counter 25 can be used to generate the line cathode drive pulses using an R-S flip-flop or the like. A'] can be obtained by using the inverted version of the output (LSB+2) of the vertical deflection counter 25 as a clock and transferring it. This drive pulse [A' to Yo'] (d is inverted to a line cathode drive pulse [I to Yo] that is at a low potential only during the valley pulse period and at a high potential of approximately 20 volts during other periods). converted,
It is added to the valley line cathode 2i~2yo.

Each line cathode 2i to 2yo is heated by a current flowing through it during the high potential of the first drive pulse [I to Yo], and emits electrons during the low potential period of the drive pulse [I to Yo]. The heated state is maintained smoothly. As a result, from the 15 pure cathodes 2i to 2yo (each has a low potential of 1!17 dynamic pulses [
Electrons are emitted only during the 16H period (d, back electrode 1) during which high potential is applied.
and the bias voltage (
Since the high potential applied to the line cathodes 2i to 2yo is more positive than the potential at the position of the line cathode 2 determined by , electrons are not emitted from the line cathodes 2i to 2yo. . Thus, at the line cathode 2, the effective vertical scan 1
During the interval υj, electrons are emitted from the upper line cathode 2a to the lower line cathode 2y every 16H period.

The emitted electrons are pushed forward by the back electrode 1, pass through the opposing slits 10 of the vertical focusing electrode 3, and are focused in the vertical force direction to form a flat electron beam.

Next, the relationship between the line cathode ii, the Q7 motion pulses [I to YO] and the vertical deflection signals v and v' will be explained using FIG. 6. The vertical deflection signals v and v' are each line cathode pulse [A ~
During the 16H period of [Y], it changes by KIH and changes in 16 steps. The vertical deflection signals V and V' both have a center voltage of v4, and are configured to vary in opposite directions to each other as v (increases sequentially and V' decreases sequentially6). These vertical deflection signals V and V' are applied to electrodes 13 and 13' of the vertical deflection electrode 4, respectively.
As a result, the electron beams generated from each of the line cathodes 2a to 2o are deflected in 16 steps in the vertical force direction, and as mentioned earlier, 111 electron beams are projected onto the screen 9 in 16 steps.
The raster is deflected so as to draw one line at a time from the top.

As a result of the above, electron beams are emitted for 16H periods from the top of the 15 line cathodes 2A to 2Y, and each electron beam is emitted from the 15 line cathodes 1 to 2 in order from the three sides downward. By being deflected line by line, the electron beam is vertically deflected one line at a time on the screen 9 from the first line at the top to the 240th line at the bottom.
A total of 240 lines of raster are drawn.

The vertically deflected electron beam passes through the control electrode 5.
and horizontal focusing electrode 6 into 180 sections (
It is divided and weighed. Figure 1 shows one of these categories. This electron beam has each section 4n,
Then, the amount of electron transmission is controlled by the side tube electrode 5, and it is focused horizontally by the horizontal focusing electrode 6 into a single thin electron beam, which is then horizontally deflected in six steps by the horizontal deflection means described below. It is deflected and sequentially illuminates each of the R, G, and B light beams 20 corresponding to two picture elements on the screen 9. Fig. 2 shows the vertical and horizontal divisions. The corresponding phosphors are R, G, and B for two picture elements, but for convenience of explanation, one picture element is RI+
Let Gl+J and the other be R2+G2+B2.

Next, the horizontal deflection (12-bit) movement circuit 41 is composed of a horizontal deflection counter (11 bits), a memory 29 that stores horizontal deflection signals, and a DA converter 38. , the input pulses of the drive circuit 41 are synchronized with the vertical synchronizing signal V and the horizontal synchronizing signal H as shown in FIG.
A pulse 6H having a repetition frequency six times that of the horizontal synchronizing signal H is used.

The horizontal deflection counter 28 is reset by the lid surface synchronization signal V and counts the horizontal six-fold pulse 6H. This horizontal deflection counter 28ijIH (11) counts vrC24oH x 6/H - 1440 times during 1V [6 times, 1V, and this count output (is supplied to the address of the memory 29. From the memory 29, the Horizontal deflection signal data (here 8 bits) is output) -1,D
-A converter 38 converts the signal into a horizontal deflection signal h' as shown in FIG.

This circuit has memory addresses for storing horizontal deflection signals corresponding to each of 6 x 240 lines, and by storing 6 pieces of regular data for each line in the memory, 6 step waves are generated in 1H period. horizontal deflection signals can be obtained.

This horizontal deflection signal is a pair of horizontal deflection signals h' and h' that change in 6 steps as shown in Fig. 7, both of which have a center voltage of v7, where h decreases sequentially and h' increases sequentially. They change in opposite directions as they move forward. These horizontal deflection signals h' are applied to electrodes 18 and 18' of horizontal deflection electrode 7, respectively. As a result, each electronic beano, divided horizontally! d R, G, B of screen 9 during each horizontal period.

R・G・B (R,・G1・BitR2・G21B2)
It is horizontally deflected so that the phosphor is sequentially irradiated with H/e. Thus, in each line raster, the electron beam is R++ G1+ for each of the 180 horizontal sections.
Bit R2+ G2+ B2(y) Each phosphor 2o is sequentially irradiated.

Therefore, the electron beam is R1+ for each horizontal section of each line.
By modulating the video signals of Gj + B1 + R2 and G2 + B2, -
Color television images can be displayed on F.

Next, the modulation control part of the electron beam will be explained.

The composite video signal applied to the television signal input terminal 23 is applied to the color demodulation circuit 30, where R-Y
The G-Y color difference signals are demodulated, the G-Y color difference signals are matrix-synthesized, and the luminance signals are Y-method-synthesized to produce R, G, and 'B primary color signals (hereinafter referred to as R, ( 1,
, B video signal) are output. Those R,G,
The B6 video signal (is applied to 180 sample and hold circuit sets 312L to 31n. Each sample and hold circuit set 31a to 31n is used for R1, G1, and B1.
For R2.

It has 61 sample and hold circuits for G2 and B2. The sample and hold outputs (d) are respectively applied to holding memory sets 32&~32n.

On the other hand, the reference clock oscillator 33 is constituted by a PLL (phase locked loop) circuit, etc., and in this embodiment, the reference clock 6 fs is six times as large as the color subcarrier fsc.
c, and double the reference clock 2. fs. The reference clock δ that generates δ is tuned so that it always has a constant phase with respect to the horizontal synchronizing signal H. Reference clock 2 fs
a is added to the deflection pulse generation circuit 42, and a signal 6H which is six times the horizontal synchronizing signal H and a daily signal switching pulse r+
+ g++ b,, r2°g2+1)2 pulses are obtained. On the other hand, the reference clock signal is applied to the f8oid sampling pulse generation circuit 34, where it is delayed by 1υj per rotation, etc., so that the effective horizontal scanning period (approximately 5 μsec) of the horizontal period (63.5μ5ec) is applied. During this time, 1OSO (circular sunblink) lines R2L1 to Bn2 are generated sequentially,
After that, one transfer/Z pulse t is generated. This sampling pulse R? L1 to Bn2 are 1 of the images to be displayed
This corresponds to each picture element when a line is divided into 360 picture elements in the horizontal direction, and its position is controlled so that it is always constant with respect to the horizontal synchronizing signal H.

These 108o samplings (Rus R2L, ~Bn
2 are each 180 sample-and-hold circuit sets 312
Six circuits are added to each of L to 31n, and this results in % sample and hold circuit set 31? For L~31nvC, 1 line is 1
RL+ of 2 picture elements for each when divided into 80 parts
Gi+ B1+ R2+ G2+ "2 video signals are sampled and held at different times. 180 sets of sampled and held R1゜G1+ B
1+R2+G2+B2 video signal is sampled and held after one line [180 sets of memo 1J32a
~32n, are transferred all at once by a transfer pulse t, and held here for the next horizontal period. This retained Rj
+ G, l B, l R2+ e2+
The B2 signal is applied to switching circuits 35a-35n. The switching circuits 35a to 35n each have R1°Gj + Bl + R2+ G2 + B2
It is composed of a tri-state or analog gate having a separate input terminal and a common output terminal that sequentially switches and outputs the input terminals.

The output of each switching circuit 35zL-35n is applied to 180 sets of pulse width modulation (PWM) circuits 372L-37n, where it is sampled and held.
The reference pulse signal is pulse width modulated according to the thickness of the I BI + R2 + G2 + B2 video signal and output. The repetition period of the reference pulse signal is the above signal switching pulse r1 + gl l b, + r2
It is desirable that the pulse width is sufficiently smaller than the pulse width of +g2 +b2, for example, 1:10 to 1:1.
A value of about 00 is used.

The outputs of the pulse width modulation circuits 372L to 37n are individually applied to the 180 conductive plates 16a to 161 of the needle electrode 5 of the display element as control signals for modulating the electron beam. Each switching circuit 35? L~35
n is a switching pulse rj applied from the switching pulse generating circuit 36;

gl + bj + r2 + g2 + B2 are simultaneously switched. Switching pulse generation circuit 3
6 are signal switching pulses rIt gj+ bl, r2+ g2+ from the aforementioned deflection pulse generation circuit 42.
Each horizontal period is divided into 6 and the switching circuits 351L to 35n are switched by H/6 each, and R1+Gj +B1+R2+G2-
r Each video signal of B2 is time-divided and output sequentially, and is supplied to the pulse width modulation circuits 37a to 37n. c) 2 switching signal rSr gj+ b++ r2+ b2+g
Generates 2.

Please be careful here (is the switching circuit 3EzL)
~36nV? R1+G1+B1.
Switching the supply of the video signal of R2le2+B2 and the electron beam R+ + Gi + by the horizontal deflection drive circuit 41
The irradiation switching horizontal deflection of B1+R2+G2+B2 to the phosphor is synchronized to C) so that it completely matches both the timing and the order. Accordingly, when the electron beam is irradiating the R1 phosphor, the irradiation amount of the electron beam is controlled by the R1 video signal, and Gi + B1 + R2+
G2 + B2 is also controlled in the same way, so that the light emission of the B2 valley phosphor is R, l G1 + B1 of each picture element.
The image signals of R2, G2, and B2 are used to improve the image quality, and the valley picture elements are displayed by emitting light according to the input image signals. This control is -1 line
This is done simultaneously for 80 sets (2 picture elements each) to display a picture of 360 pictures per line, and then for 240 minutes of lines sequentially starting from the upper line, so that one picture is displayed on the screen 9. That will happen.

The above operations are performed on one input television signal.
This is repeated for each field, and as a result, a moving television image is displayed on the screen 9 in the same way as a normal television receiver.

By the way, in the image display device as described above, it is extremely difficult to assemble the pair of horizontal deflection electrodes located at 160 slits ([4+1) of the horizontal focusing electrode 6 as designed, and in fact the VC( In this case, in a certain horizontal section as shown on the left (1111) in FIG.

Although the electron beam collides with the B phosphors sequentially, in other horizontal sections, as shown in Figure 8, right 11II, the electron beam does not exactly collide with a predetermined phosphor, and instead collides with other parts or other phosphors. A problem arises in which there is a collision between the two.

Here, it is possible to change the deflection amount of the electron beam by controlling the horizontal deflection voltage, but in this case, since the horizontal deflection voltage is commonly applied to all horizontal deflection electrodes, The drawback is that while some horizontal sections cannot be corrected, illumination errors occur in other originally accurate horizontal sections.

Purpose of the Invention In view of the problems described in the present invention (d, -1-, l:
It is an object of the present invention to provide an image display device in which an electron beam is accurately caused to collide with a phosphor.

Structure of the Invention In the present invention, each horizontal section molecule 7'i is provided with an electronic beam 1.
A large number of pairs of horizontal deflection electrodes installed across the path of , are divided into n groups (an integer of n-2 or more), and a horizontal deflection signal is applied independently to each divided horizontal deflection electrode group. By doing so, the horizontal deflection can be corrected for each group, and accurate horizontal deflection can be performed over the entire range in the horizontal direction.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 9 to 11. FIG. 9 shows an example in which a large number of horizontal deflection electrode pairs are divided into two. 1. Figure 1o shows its driving circuit.

In FIG. 9, 182L and 18&' are a pair of horizontal deflection electrodes, and 18b and 18b' are the horizontal deflection electrodes 1.
8J 18a' A pair of horizontal deflection electrodes installed independently, one horizontal deflection electrode 18a, 1
8b, a step-like horizontal deflection signal that decreases one by one is applied to the other horizontal deflection electrode 18iL'.

18t)'(/(Inversely, add the 11@ order increasing horizontal deflection number.

In FIG. 10, 38. 38' is a digital-to-analog (I) circuit that converts the digital horizontal deflection signal sent from the horizontal deflection processing circuit shown in Fig. 3 into an analog signal.
/A) Converter, 41'&, 412L'.

41 b and 41 b' i are horizontal deflection output circuits, respectively, and the horizontal deflection output circuit 4 '' + 4 ' l b
The output of the D/A converter 38 is added to the horizontal deflection output circuit 41a'.

The output of the D/A converter 38' is added to 41b'. And a horizontal deflection output circuit 41a.

41a' which change in mutually opposite directions are applied to the horizontal deflection electrodes 18ia, 18'a', and horizontal deflection signals which change in mutually opposite directions from the horizontal deflection output circuits 41b, 41b/ are applied to the horizontal deflection electrode 18b. .

Add to 18b'.

Further +/U, above horizontal deflection output circuit 4” + 41
DC voltage for 2L'? 1ill (Incorporated Foundation) circuit 43 is provided, and the horizontal deflection output circuit 41 is provided with a DC voltage nailing circuit 43' for + and 41b'. This DC type oppression 61
11 times wT42142' DC bias voltage (3rd
By changing V7) in Figure 11, a, b (y
As shown, the horizontal deflection signals change in opposite directions, h
' The horizontal deflection output circuit 41 can change the potential between C'vP-P + D'VP-P.
&+41a', horizontal deflection output circuit 41b, 41b'
It is possible to adjust the amplitude of the horizontal deflection signal independently between the pair of horizontal deflection electrodes 182L, 18a' and the pair of horizontal deflection electrodes 18b, 18b'. .

Therefore, accurate horizontal deflection correction can be achieved over the entire horizontal range. In addition, in Figure 1o, 44.44
' are each gain-side (goods) circuits.

Further, in the above embodiment, the horizontal deflection electrode is divided into two parts, but the invention is not limited to this, and for example, three parts are used.
It may be divided into four parts or divided into four parts.

Effects of the Invention (2) According to the present invention, even if an assembly error occurs in the horizontal deflection electrode, this can be mechanically and electrically compensated for to ensure accurate horizontal deflection over the entire horizontal range. An operation can be performed to cause the electron beam to impinge on a predetermined phosphor.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of an image display element used in an image display device according to an embodiment of the present invention, FIG. 2 is an enlarged view of the fluorescent surface of the image display element, and FIG. 4, 5, 6, and 7 are block diagrams of a drive circuit devised prior to the present invention to drive the same, and each part of the drive circuit is explained and explained. FIG. 8 is a schematic diagram for explaining the operation of a conventional image display device. FIG. 9 is a front view of the essential parts of an image display element used in an image display device according to an embodiment of the present invention. Fig. 10 is a block diagram of the main parts of one drive circuit used in the same device, and Fig. 11 is a θ-shaped diagram of the bottom valley to explain the operation of the drive circuit. ... Line cathode, 4 ... Vertical deflection electrode, 5 ... Beam stream side grinding electrode, 7 ... Horizontal deflection electrode, 9 ... Screen plate, 10 ・・
・Slit, A4...Slit, 16,152L
~16n... Conductive plate, 1 B&, 18? L
', 18b, 18b', -,,, conductive plate, 20
..... Fluorescent material, 23 ..... Input terminal, 24
... Synchronous separation circuit, 25 ... Vertical deflection counter, 26 ... Line cathode drive circuit, 27 ...
... Memory, 28 ... Horizontal deflection counter, 29 ... Memory, 30 ... Color demodulation circuit, 31a to 31n ... Sample hold circuit, 32a-32n...Memory, 33...
・Reference clock oscillator, 34...Sampling pulse generation circuit, 35a to 35n...Switching circuit, 36...Switching pulse generation circuit, 37a to 37n...=P W M circuit, 38
．． 3 s'-=-D/A converter, 39...J
)/A conversion circuit, 40... vertical 19, direction, drive circuit, 41'J 412L', 41 b, 41
b'...Horizontal deflection output circuit, 42...
Deflection pulse generation circuit, 43.43'...DC type suppression circuit, 44°44'...Gain open side 1 circuit. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Figure 20 @3 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure C0-) Δ'

Claims (1)

[Claims] The screen is divided horizontally into a plurality of sections, and phosphors of multiple colors such as red, green, and blue are arranged horizontally in each horizontal section, and electron beams are applied to each horizontal section. A pair of horizontal deflection electrodes is provided in each section so as to sandwich the path of the electron beam, and the pair of horizontal deflection electrodes deflects the electron beam in the horizontal direction for each horizontal section. At the same time, the multiple pairs of horizontal deflection electrodes are divided into n (an integer of n-2 or more), and each of the divided horizontal deflection electrodes is An image display device that applies horizontal deflection signals independently to each electrode group.