JPS5883482A - Picture display - Google Patents

Abstract

PURPOSE:To prevent lateral lines at the boundary of each divided section from being remarkable, by deflecting electron beams from an electronic beam source for one divided section so as to be irradiated to the adjacent divided section. CONSTITUTION:Electron beams from a cathode 2a,... are deflected with a deflection width as twice as conventional width from a vertical deflection electrode 4. Thus, as display lines on a screen 9, those resulted from the electron beams with a large deflection angle are not made adjacent with each other, allowing to arrange the beam spot due to the electron beam having the largest deflection angle adjacent to the beam spot due to the electron beam with the smallest deflection angle. As a result, the characteristics of the electron beams can be averaged as a whole as to the vertical direction of the picture on the screen 9, allowing to display the uniform screen.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention vertically divides a screen into a plurality of sections and generates an electron beam for each section.
Regarding a device that displays a plurality of lines by vertically deflecting an electron beam in each section and displaying a television image as a whole, Ω is also used. The object of the present invention is to provide a device that can obtain uniform image quality over the entire screen regardless of the corners.

Conventionally, cathode ray tubes have been mainly used as display elements for displaying color television images, but conventional cathode ray tubes have a very long depth compared to the screen size, making it difficult to create thin television receivers. It was impossible to do so. In addition, although EL display elements, plasma display devices, liquid crystal display elements, etc. have recently been developed as flat display elements, all of them are insufficient in terms of performance such as brightness, contrast, and color reproducibility. However, it has not yet been put into practical use.

Therefore, we aimed to achieve a device that can display color television images on a flat display device using electron beams, and we divided the screen on the screen vertically into multiple sections. An electron beam is generated for each section, and each electron beam is deflected vertically for each section to display a plurality of lines.Furthermore, it is divided horizontally into a plurality of sections, and each section is divided into R, G, A television image is displayed as a whole by causing the phosphors such as B to emit light sequentially and controlling the amount of electron beam irradiation to the phosphors such as R-G and B using color video signals. something was invented.

First, an example of the basic configuration of the image display element used here will be explained with reference to FIG.

This display element includes, in order from the back to the front, a back electrode 1, a line cathode 2 as an electron beam source, a vertical focusing electrode 3.
3', a vertical deflection electrode 4, an electron beam flow control electrode 5, a horizontal focusing electrode 6, a horizontal deflection electrode 7, an electron beam acceleration electrode 8, and a screen plate 9 are arranged, and these are made of flat glass pulp ( (not shown) is housed in an evacuated interior. Line cathode 2 as electron beam source
is horizontal so as to generate an electron beam distributed in a horizontal line. A plurality of such wire cathodes 2 (only four wire cathodes 2A to 22 are shown here) are provided in the vertical direction at appropriate intervals. In this embodiment, it is assumed that 15 pieces are provided. Let's call it 2i~2yo. These wire cathodes 2 are constructed by coating an oxide cathode material on the surface of a tungsten wire having a diameter of 10 to 20 μΦ, for example. Then, as described later, the upper line cathode 2
The electron beams are controlled to emit electron beams for a certain period of time in order from A to A. The back electrode 1 creates a potential gradient with a vertical focusing electrode 3, which will be described later, and prevents the generation of electron beams from other line cathodes 2 other than the line cathode 2 which is controlled to emit electron beams for a certain period of time. It has the function of suppressing the electron beam and pushing the generated electron beam forward only. This back electrode 1 may be formed by a coating of electrically conductive material applied to the inner surface of the rear wall of the glass bulb. However, instead of the back electrode 1 and the linear cathode 2, a planar electron beam emitting cathode may be used to extract the linear beam through a screen or the like.

It is a conductive plate 11 having horizontally long slits 10 facing each of the vertical focusing electrodes 3 and cathodes 2i to 2yo. focus in a direction.

The slit 1o may be provided with crosspieces at appropriate intervals in the middle, or it may be a row of through holes arranged horizontally at small intervals (nearly touching each other). 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 1o, respectively, and conductors 13 and 13 are provided on the upper and lower surfaces of the insulating substrate 12, respectively.
' is provided. Then, a vertical deflection voltage is applied between the opposing conductors 13 and 13',
deflects the electron beam in the vertical direction. In this configuration example, one wire cathode 2 is formed by a pair of conductors 13, 13'.
The electron beam is deflected vertically to a position corresponding to 16 lines.

The 16 vertical deflection electrodes 4 constitute 16 pairs of conductors corresponding to each of the 16 line cathodes 2, and in the end, the electron beam is deflected to draw 240 horizontal lines on the screen 9. do.

Next, the control electrodes 5 are composed of conductive plates 16 each having a vertically long slit 14, and a plurality of control electrodes 16 are arranged in parallel in the horizontal direction at predetermined intervals. In this configuration example, 320 control electrode conductive plates 15a to 16n are provided (only 10 are shown in the figure). Each of the control electrodes 5 extracts the electron beam by dividing it into one picture element in the horizontal direction, and controls the amount of electron beam passing therethrough according to the video signal for displaying each picture element.

Therefore, if 32,020 control electrodes 5 are provided, 320 pixels can be displayed per horizontal line.

In addition, in order to display images in color, each picture element is R, G.
, B, and each control electrode 6
The R, G, and B video signals are sequentially added to the . In addition, 320 sets of video signals for one line are simultaneously applied to the 320 control electrodes 6, and the video for one line is displayed at one time.

The horizontal focusing electrode 6 is composed of a conductive plate 1 having a plurality of vertically long slits 16 (320 slits 16) facing the slits 14 of the control electrode 5. Each electron beam is focused in the horizontal direction and split into an electron beam.

The horizontal deflection electrode 7 is made up of a plurality of conductive plates 18 arranged vertically in the middle of each of the slits 16, and a horizontal deflection voltage is applied between each conductive plate 18 for each pixel. The electron beams are respectively deflected in the horizontal direction, and the R, G, and H phosphors are sequentially irradiated on the screen 9 to cause them to emit light. In this embodiment, the deflection range is the width of one picture element for each electron beam.

The acceleration electrode 8 is composed of a plurality of conductive plates 19 provided horizontally at the same position as the vertical deflection electrode 4.
The electron beam is accelerated to collide 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 adding a metal bank layer (not shown). For each slit 14 of the control electrode 6, one pair of phosphors 2o is provided for each of the three colors R9G and B for each construction beam divided in the horizontal direction. It is applied in vertical stripes. In FIG. 1, the broken lines drawn on the screen 9 indicate divisions in the vertical direction that are displayed corresponding to each of the plurality of line cathodes 2, and the two-dot chain lines correspond to each of the plurality of control electrodes 6. Indicates the horizontal division displayed. As shown in the enlarged view in FIG.
0, and has a width of 16 lines in the vertical direction. The size of one section is, for example, 1 yen in the horizontal direction,
The vertical direction is 16 theories.

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

Further, in this embodiment, only one pair of R, G, and H phosphors 20 for one picture element is provided for one control electrode 6, that is, one electron beam, but two Of course, two or more pairs for more than two picture elements may be provided, and in that case, R, G, and B video signals for two or more picture elements are sequentially applied to the control electrode 6, and in synchronization therewith. A horizontal deflection is made.

Next, a description will be given of displaying television images on this display element. First, a driving portion for irradiating the screen 9 with an electron beam to cause the phosphor to emit light and generate a raster will be described.

The power supply circuit 22 is a circuit for applying a predetermined bias voltage (operating voltage) to each electrode of the display element, -v1 to the back electrode 1, v3. (3) Apply a DC voltage of v6 to the horizontal focusing electrode e, v8 to the accelerating electrode 8, and v9 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 V and a horizontal synchronization signal H.

The vertical drive pulse generation circuit 25 is composed of a counter that is reset by a vertical retrace pulse and counts horizontal pulses, and has an effective vertical scanning period (here, a period of 240H) excluding the vertical retrace period of the vertical period. 16 drive pulses each having a length of 16H period [
42 mouths...Yo] is generated. This driving pulse [
42 ports...] are added to the line cathode drive circuit 26,
Here, it is inverted and converted into a line cathode driving pulse [472'...Yo'] which is at a low potential only during each pulse period and at a high potential of about 20 volts during the other periods, Each line cathode 2a, 20.・・・・・・Added to 2yo. Each line cathode 2a,...'-2yo is its driving pulse [
A current is passed between the high potentials of the driving pulses [A' to Y'], and the heated state is maintained so that electrons can be emitted even during the low potential period of the drive pulses [A' to Y']. As a result, electrons are emitted only during the period 16HJi in which low potential drive pulses [I' to G] are applied to each of the 15 line cathodes 2I to 2Y. During the period when a high potential force is being applied, the potential at the line cathode 2 is lower than the potential at the position of the line cathode 2 determined by the bias voltage applied to the back electrode 1 and the vertical focusing electrode 3. Since the applied high potential becomes positive, no electrons are emitted from the line cathodes 2I to 2Y. Thus, in the line cathode 2, electrons are sequentially emitted from the upper line cathode 2a toward the lower line cathode 2y every 1 esH period during the effective vertical scanning period. The emitted electrons are pushed forward by the back electrode 1, pass through the opposing slits 1o of the vertical focusing electrode 3, and are focused in the vertical direction to form a flat electron beam.

Next, the vertical deflection drive circuit 27 is composed of a counter that is reset by each of the vertical drive pulses [I to Y] and counts the horizontal synchronization signal, a conversion circuit that converts the count output from D/A, etc. During the 16H period of each vertical drive pulse [I to Y], a pair of vertical deflection signals v and v' that change in 16 steps by 1H are generated. The vertical deflection signals V and V' both have a center voltage of v4,
They are designed to change in opposite directions, such that V increases sequentially and v/ decreases sequentially. These vertical deflection signals V and V' are applied to electrodes 13 and 1 of the vertical deflection electrode 4, respectively.
3! As a result, each line cathode 2-2
The electron beam generated from Y is vertically deflected in 16 steps, and as mentioned earlier, on the screen 9, one electron beam scans 16 lines of raster one by one from the top.
It is deflected to draw line by line.

As a result of the above, electron beams are emitted for 16H periods in order from the one above the 16 line cathodes 2A to 2Y, and each electron beam is sequentially emitted for one line from the top to the bottom within the 16 sections in the vertical direction. By being deflected, the screen 9
At the top, the electron beam is vertically deflected one line at a time from the first line at the top to the 240th line at the bottom, and a total of 240 lines of two stars are drawn.

The electron beam thus vertically deflected is horizontally divided into 320 sections by the control electrode 5 and the horizontal focusing electrode 6 and extracted. Figure 1 shows one of these categories. The amount of electron beam passing through each section is controlled by the control electrode 6, and is focused horizontally by the horizontal focusing electrode θ into a single narrow electron beam. The R, Q, and H phosphors 20 on the screen e are deflected in three stages.
irradiate sequentially.

That is, the horizontal drive pulse generation circuit 28 is composed of three cascaded monostable multivibrators, etc.
Triggered by a horizontal synchronization signal, three horizontal drive pulses r, g, b with equal pulse width are generated within one horizontal period.
occurs. Here, as an example, each pulse width is about 17 μsec, and the effective horizontal scanning period is 5
Three pulses "*Q, b" are generated during o11 seconds.Those horizontal driving pulses r, g, b
is applied to the horizontal deflection drive circuit 29. This horizontal deflection drive circuit 29 is switched by horizontal drive pulses r, q, and b to generate a pair of horizontal deflection signals R and h' that change in three stages. Horizontal deflection signal.

Both h' have a center voltage of v7, and change in opposite directions such that b increases sequentially and h' decreases sequentially. These horizontal deflection signals h' are applied to electrodes 18 and 18' of horizontal deflection electrode 7, respectively. the result,
Each horizontally divided electron beam is applied to the R, G of the screen 9 during each horizontal period.

It is horizontally deflected so that the phosphor B is sequentially irradiated with 17 μsea. However, in the display element shown in FIG. 1, in the horizontal deflection electrode 7, one conductor 18 or 1Ef is used for deflecting two adjacent sections of electron beams, and these adjacent electron beams are mutually connected to each other. Since it is designed to produce a deflection effect in the opposite direction, the electron beam of 320 sections has an odd numbered section of R-G-B.
If the beams are deflected in the order of , the even-numbered sections are deflected in the order of B, G-, H, and so on, so that every other section is deflected in the opposite direction.

Thus, in each line raster, the horizontal 3
The electron beams are R and G for each of the 20 sections.

Each phosphor 20 of B is sequentially irradiated.

Therefore, for each horizontal section of each line, the electron beam is
By modulating the G and B video signals, a color television image can be displayed on the screen 9.

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

First, the composite video signal applied to the television signal input terminal 23 is applied to the color demodulation circuit 30, where the R-Y
and B-Y color difference signals are demodulated, the G-Y color difference signals are matrix-synthesized, and further, they are combined with the luminance signal Y to generate R, G, and H primary color signals (hereinafter referred to as R, G, A B video signal) is output. Those R, G, and B6 video signals are processed by 320 sample and hold circuit sets 31a to 3.
Added to 1n. Each sample and hold circuit group 31a~
31n each has three sample and hold circuits for B, G, and B. The sample and hold outputs of these sample and hold circuit sets 31a to 31n are respectively applied to holding memory sets 32a to 32n.

On the other hand, the sampling reference clock oscillator 33 is a PLL.
(phase-locked loop) circuit, etc., and generates a reference clock of approximately 6.4 MHz in this embodiment. The reference clock is controlled to always have a constant phase with respect to the horizontal synchronizing signal H. This reference clock is applied to the sampling pulse generation circuit 34, where it is delayed by one clock period by a shift register, etc., for an effective horizontal scanning period (approximately 60 μIIeC) of the horizontal period (63,5 μ5ec). to 3
Twenty sampling pulses 8 to n are generated in sequence, followed by one transfer pulse. This sampling pulse a-n corresponds to each picture element when one line of the video to be displayed is divided horizontally into 320 picture elements, and its position is always constant with respect to the horizontal synchronizing signal H.・Controlled by sea urchins.

These 320 sampling pulses a-n correspond to the 320 sample-and-hold circuit sets 31a to 31n, respectively.
is added to each sample-and-hold circuit set 3.
In 1a to 32n, R, G, and B video signals of each picture element when one line is divided into 320 picture elements are individually sampled and held. The sampled and held 320 sets of R, G, and B video signals are stored in the memory 32a after the sample and hold for one line is completed.
~32n, they are transferred all at once by a transfer pulse t, and are held here for the next one horizontal scanning period.

One line of R held in the memories 32a to 32n,
G and B video signals are applied to 320 switching circuits 35a to 35n, respectively. Switching circuit 35a
~35n are R and G, respectively.

Each switching circuit 35a has individual input terminals of B and a common output terminal that sequentially switches and outputs them.
The output of ~35n is used as a control signal for modulating the electron beam and is sent to the 320 conductive plates 15a of the control electrode 6 of the display element.
~15n each separately. Each switching circuit 35a to 35n is a switching pulse generation circuit 36.
Switching is controlled simultaneously by switching pulses applied from the The switching pulse generation circuit 36 receives pulses r and q from the horizontal drive pulse generation circuit 28 described above.

The effective horizontal scanning period of about 50 μsec of each horizontal period is divided into three, and the switching circuits 35a to 35n are switched by about 17 μtIeC, and the R, G, H
The video signals are time-divided and outputted alternately and sequentially, and switching signals r, g, and b are generated to be supplied to the control electrodes 15a to 15n. However, among the switching circuits 35a to 35n, odd-numbered switching circuits 35a, 35c,
... are switched in the order of R→G-B, and the even-numbered switching circuits 35b, ssd...35
Conversely, n is switched in the order of B→G→R.

What should be noted here is that the switching circuits 35a to 3
The supply switching of R, G, and B video signals at 5n and the horizontal deflection of the electron beam irradiation switching to the R, G, and B phosphors by the horizontal deflection drive circuit 29 are completely performed in both timing and order. They are synchronously controlled to match. As a result, when the electron beam is irradiating the R phosphor, the irradiation amount of the electron beam is controlled by the R video signal, and G and B are similarly controlled, so that the R, G, and B6 of each picture element are controlled in the same manner. The light emission of the phosphor is controlled by the R, G, and B video signals of the picture element, and each picture element is displayed by emitting light according to the input video signal. Such control is performed simultaneously for 320 picture elements for one line to display one line of video, and then sequentially performed for 240 minutes from the upper line to display one video on 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.

In the above explanation, the terms "horizontal direction" and "vertical direction" refer to the horizontal direction, which refers to the direction in which line units are displayed when an image is projected, and the vertical direction, which refers to the direction in which the lines are stacked. It is used in the sense that it is certain, and is not directly related to the vertical and horizontal directions on the actual screen.

As described above, a television image is projected on this display device, but vertical deflection is not performed evenly due to assembly errors during manufacturing of display elements. The intervals between the lines on the screen may become uneven, or the ends of the lines may be shifted vertically, resulting in a state where they are not displayed in parallel. or,
Since the path through which the electron beam passes differs depending on the deflection angle of the vertical deflection, the beam spot diameter on the screen 9 may vary or may be distorted in the horizontal or vertical direction. When viewed as a television image on the screen 9, this results in repeated distortion every 16 lines, which is perceived as horizontal lines.

In such a case, the present invention makes it possible to make the horizontal lines at the boundaries of each division on the screen inconspicuous, thereby making it possible to obtain an image with high uniformity in the vertical direction as a television image. The purpose is to provide a device.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings showing the configuration of its main parts.

In the conventional screen 9J:, 16 lines are supplied from one line cathode 2, so as shown in FIG.
The configuration is such that the electron beam when the beam is deflected most downwardly by the vertical deflection electrode 4 and the electron beam when the electron beam from the line cathode 20 is deflected most upwardly are adjacent to each other. The properties of the beam in the vertical direction are determined by the vertical deflection angle, and the larger the deflection angle, the more distortion occurs, and the shape of the beam spot is also distorted. As a result, the boundaries between each division stand out and are recognized as horizontal lines.

Therefore, in this device, as shown in Fig. 6, each line cathode 2
The electron beam from ... is deflected by the vertical deflection electrode 4 with a deflection width twice that of the conventional deflection width. By doing this, electron beams with large deflection angles are not adjacent to each other as display lines on screen e, and the beam spot of electron beams with the largest deflection angle is adjacent to the electron beam with the smallest deflection angle. It can be arranged by beam.

For this reason, the conventional waveforms of the vertical deflection drive output voltage A and the clamping cathode drive voltage B as shown in FIG. 5 are changed as shown in FIG. 7. In other words, this means that the line cathode 2 which is the source of the electron beam for each line on the screen 9...
This is due to the need to switch alternately. As a result, the characteristics of the electron beams are averaged as a whole in the vertical direction of the screen 9, and a homogeneous screen can be displayed.

Next, a specific example of a circuit that operates in this manner will be described.

In this device, compared to the conventional device, it is necessary to add one wire cathode 2a and one wire cathode 2β at the top and bottom in the vertical direction. Let these be a and β, respectively.

These two additions are completely different from each other in terms of performance and arrangement.
It's no different from 5. And the vertical deflection voltages V and 7 and the linear cathode drive voltage α shown in FIG.

A "one mouth"...Y", β is required. The vertical deflection voltage D is the inversion of the vertical deflection voltage V with respect to the DC voltage v4, and the line cathode drive voltage V'・・・・・・f
, β are the same as α, A, "2 mouths", etc. shown in the figure.

By replacing the above-mentioned voltages with the conventional voltages shown in FIG. 6, it is possible to change the conventional raster in the vertical deflection state as shown in FIG. 4 into the raster in the vertical deflection state as shown in FIG.

Next, vertical drive pulses [42 ports...
. A train of 240 horizontal pulses is generated at its output. The period of each pulse is a horizontal period, and the repetition period of the entire pulse group is a vertical period. This is input to a 6-bit counter 39 as a clock. This counter 39 is cleared by the vertical synchronization signal V. counter 3
The count output of 9 is input to the decoder 40.

This decoder 4o is for address control of the vertical deflection memories 41, 42, and when a general-purpose memory is used as the memories 41, 42, the address decoder 40 is generally built-in. As a result, 240
Vertical deflection notes according to the pulse train! J-41 and J-42 are sequentially addressed from address 0 every 1,000 periods. Therefore, deflection memory 41.42(7)”00
'-The "IF" address (in hexadecimal notation) is repeatedly addressed every 32 horizontal periods and 7.5 times in one vertical period. In each address of the deflection memories 41 and 42, data for generating a deflection voltage for displaying each line is preset as digital data of 8 pins each. The output is input to D/A converters 43 and 44, and the DC level and variation width of the output deflection drive signals V and I are determined by the positive reference voltage and the negative reference voltage.

An example of data preset in the deflection memories 41 and 42 is shown in the following table. With this data, vertical deflection voltages V and V' having waveforms as shown in FIG. 7 can be obtained.

Next, we will explain the line cathode drive circuit. FIG. 9 shows an example of the circuit configuration. This consists of one 8-bit counter 46 and 17 8-bit decoders 46α, 46i, etc.
46β, 17 set-reset flip-flops 47α, 4fi, 47β, 17 AND gates 48α, 48i.

...48β, delay inverter 49, 17 D-flip-flops 5oα, 50i, ...
Consists of 6oβ.

First, to the 8-bit counter 45, the horizontal synchronizing signal H is input to the clock terminal, and the vertical synchronizing signal V is input to the clear terminal. That is, it counts horizontal synchronizing signals for 240 horizontal periods corresponding to an effective screen in a vertical period, and is basically the same as the 4-bit counter in the vertical deflection circuit described above.

Next, the output of this counter 46 is input to all 17 8-bit decoders 46α to 46β.

An example of the configuration of the decoders 46a to 46β is shown in FIG. The example in FIG. 10 shows the contents of the decoder 46, and the 8-bit count output data is 0000000.
The output of the AND gate 61i, which outputs a high level only when the signal is 1', is applied to the cassette terminal of the flip-flop 4fi, and the 8-bit count data becomes 'o001o'.
111 The output is at a high level only when the output is ``23''.

The output of AND gate 52a is applied to the reset terminal of flip-flop 4f.

Data regarding the timing of setting and resetting the flip-flops 47α to 47β are shown in the following table.

This is a decimal number starting from 0 for 240 water periods.
239".

The set-reset pulses generated by these 17 decoders 46α-46β are input to 17 set-reset flip-flops 47111-47β, respectively. Further, the outputs of the flip-flops 4a to 47β are respectively applied to one input of the ant gates 48α to 48β, and the horizontal synchronizing signal H is input to the other input.

The output of AND gates 48α to 48β is D-flip 70
It is input to the knobs 60α to 5oβ. A horizontal synchronizing signal H is supplied as the clock via a suitable delay inverter 4a. This delay is on the order of the gate delay,
The basic effects on operation are quite large.

As a result, the vertical deflection drive pulse α eye...Yo.

β is obtained, and the drive pulse α eye “...β” as shown in FIG. 7 can be obtained through the line cathode drive circuit 26. As a result, the vertical deflection voltage are synchronized, and rasters as shown in FIG. 6 can be sequentially constructed on the screen from the top to the bottom of the screen.

As described above, according to the present invention, in a device that divides a screen into a plurality of sections in the vertical direction and displays a plurality of lines in each section, an electron beam from an electron beam source in one divided section is transferred to an adjacent divided section. By deflecting the light so as to irradiate it, horizontal lines at the boundaries of each division are not noticeable, and a good, homogeneous image can be displayed over the entire surface.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing the basic configuration of an example image display element used in the image display device of the present invention, FIG. 2 is an enlarged view of the screen, and FIG. 3 is the basic configuration of the drive circuit of the device. 4 is a schematic diagram explaining the deflection operation, FIG. 5 is a waveform diagram of the deflection voltage, and FIG. 6 is a schematic diagram explaining the deflection operation of the image display device in an embodiment of the present invention. 7 is a waveform diagram of the deflection voltage, and FIG. 8 is a waveform diagram of the deflection voltage. 9 and 10 are circuit diagrams of the main parts of the device. 200...Line cathode as an electron beam source, 3,3'...
... Vertical focusing electrode, 4... Vertical deflection electrode,
5111111111111 Electron beam flow control electrode, 6
...Horizontal focusing electrode, 7...Horizontal deflection electrode, 8...Electron beam acceleration electrode, 9-...
・Screen, n, 2o...fluorescent material, 23...
...Input terminal, 24...Synchronization separation circuit, 25.
...Vertical drive pulse generation circuit, 26...
line cathode drive circuit, 27... vertical deflection drive circuit,
28...Horizontal drive pulse generation circuit, 29...
...Horizontal deflection drive circuit, 30...Color retuning circuit, 31a-31n0・1111・Sample and hold circuit group, 32a ++32n**...1111 memory group, 3
4...Sampling pulse generation circuit, 36a~
35n...Switching circuit, 36...
・Switching/curse generation circuit, 37..., OR gate, 39 @1111@'@@AND gate, 3
9... Counter, 4o・Φ轡... Decoder, 41, 42-@-... Memory for deflection, 434
4...D/A converter, 45...
・Counter, 46α~46β...Life decoder,
47α~47β++11@lI...Sezuto reset frisob flop, 48α~48β...e・Ant'
K), 49...delay inverter, 50α
~50β...@D-flip-flop. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Figure 4 Figure 5 Figure 7 Figure 8 Figure 9

Claims (1)

[Claims] A screen coated with phosphor is vertically divided into multiple sections, and a linear electron beam source is provided corresponding to each section. In addition to irradiating each of the corresponding divisions above, it also irradiates the lower part of the adjacent division located above each corresponding division, and the upper part of the adjacent division located below. An image display device characterized by: