JPS6188431A - Image display device - Google Patents

Abstract

PURPOSE:To reduce the space for an image display device by installing various electrodes located between an electron beam generator and a screen in a vacuum case and leading out electrode leads through resistors formed on the outer surface of the case by printing or similar method. CONSTITUTION:An image display device is assembled by placing in a vacuum glass case 43, a back electrode 1, a linear cathode 2, vertical focusing and deflection electrodes 3 and 4, a beam current control electrode 5, horizontal focusing and deflection electrodes 6 and 7, a beam-accelerating electrode 8 and a screen plate 9 in that order. Resistors 53 are formed on the outer surface of the case 43 by applying a ruthenium-oxide-system paste by printing. Ends of the resistors 53 are connected to the lead-out terminals 15-1'-15-n' of beam current control electrodes 5 and the other ends are connected to IC output terminals 52. Accordingly, it is possible to achieve protective effect without providing any space for protective resistance, thereby reducing the whole size of the image displayer.

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 in depth and thin compared to the size of both sides. It was impossible to create a television receiver for this purpose6.Furthermore, EL display devices, plasma display devices, liquid crystal display devices, etc. have recently been developed as flat display devices, all of which have low brightness, contrast, It is insufficient in terms of performance such as color display, and has not yet been put into practical use.

Therefore, the present applicant proposed a new display device in Japanese Patent Application No. 56-20618 (Japanese Unexamined Patent Publication No. 57-135590) to achieve a flat display device using electron beams.

This method generates an electron beam for each section when the screen is vertically divided into multiple sections, and displays multiple lines by deflecting each electron beam vertically for each section. However, it displays a television image as a whole.

First, a basic configuration example of the image display element used here will be explained with reference to FIG. This display element consists of, in order from the back to the front, a back electrode (1), a line cathode (2) as a beam source, a vertical focusing electrode (3), and a vertical deflection electrode (
4), beam current control electrode (5).

It consists of a horizontal focusing electrode (6), a horizontal deflection electrode (7), a beam accelerating electrode (8), and a screen plate (9), which are arranged inside the vacuum of a flat glass bulb (not shown). vertical deflection electrode (4)
If necessary, an auxiliary electrode (3') as a second vertical focusing electrode or a front horizontal focusing electrode may be arranged between the beam current control electrode (5) and the beam current control electrode (5).

A line cathode (2) serving as a beam source is stretched horizontally so as to generate an electron beam distributed linearly in the horizontal direction, and a plurality of line cathodes (2) are arranged vertically at appropriate intervals. Books (only four books (2a) to (2d) are shown in the figure) are provided. In this conventional example, it is assumed that 15 pieces are provided. Let them be (2a) to (2o). 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. And these line cathodes (
2a) to (2o) are heated to generate a thermionic electron beam when a current is passed through them, and as will be described later, the line cathode (2a) sequentially emits electron beams for a certain period of time. controlled by. The back electrode (1) is
Suppressing the generation of electron beams from line cathodes other than the line cathode that is controlled to emit electron beams for a certain period of time,
It also functions to push out the generated electron beam only in the forward direction. This back electrode (1) may be formed by applying a conductive material 1" to the inner surface of the rear wall of the crow bulb.
) and the line i+3+(2), a planar electron beam emitting 113 pole may 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 (2o), and the vertical focusing electrode (3) is a conductive plate (11) having a horizontally long slit (10) facing each of the line cathodes (2a) to (2o). The pi beam is taken out through the slit (10) and focused in the vertical direction. Electron beams for one horizontal line (368 cylindrical lines) are taken out at the same time. In the figure, only one section in the horizontal direction is shown. The slit (10) may be provided with crosspieces at appropriate intervals in the middle, or with small intervals in the water/V direction (
are almost touching) and there are many n^I S+rI.

The row of through-holes provided may be substantially formed as slits (j:lr IJ+2). When the auxiliary electrode (3') is arranged as a second vertical focusing electrode, its shape is the same as that of the vertical focusing electrode (3) described above, and when it is arranged as a front horizontal focusing electrode, it has the same structure as described below. It has the same structure as the horizontal focusing electrode (6).

A plurality of vertical deflection electrodes (4) are arranged horizontally at intermediate positions between the slits (10),
A conductor (
13) (13') is provided. Then, a vertical deflection voltage is applied between the opposing conductors (13) (13') to deflect the electron beam in the vertical direction. In this conventional example, a pair of conductors (13)
(13') deflects the electron beam from one line cathode (2) vertically to a position corresponding to 16 lines. The 16 vertical deflection electrodes (4) constitute 15 conductor pairs corresponding to each of the 15 line cathodes (2), so that 240 horizontal lines are drawn on the screen (9). Deflect the electron beam to

Next, the control electrodes (5) each consist of a conductive plate (15) having a long slit (14) in the vertical direction, and a plurality of control electrodes (15) are arranged in parallel in the horizontal direction at a predetermined interval, each having a width of lb. In this conventional example, 184 conductive plates for control electrodes (1
5-1) to (+5-n) are provided. (9 in the diagram)
(only books shown). Each of the control electrodes (5) takes out the '1a child beam horizontally by dividing it into two picture elements each, and controls the amount of passage thereof in accordance with a video signal for displaying each picture element. Therefore, the control electrode (5
) If 181) conductive plates (15-1) to (15-n) are provided, 368 pictures can be displayed per horizontal line. In addition, in order to display images in color, each picture element is displayed using phosphors of three colors, R, G, and B, and each control electrode (5) has two picture elements of R, G, and B. Each video signal is added sequentially. In addition, 184 control electrodes (5
) 184 sets (2 pixels per set) of video signals for one line are simultaneously applied to each of conductive Fj (15-1) to (15-n), and the video signal for one line is is displayed at once.

The horizontal focusing electrode (6) is connected to the slit (14) of the control electrode (5).
) and a conductive plate (17) having multiple (184) long slits (16) in the vertical direction facing each other. Focus horizontally into a narrow beam of electrons.

The horizontal deflection electrode (7) is made up of a plurality of conductive plates (18) (18') arranged vertically on both sides of the slit. ) (18') is applied with six levels of horizontal deflection voltage to horizontally deflect the electronic beams of each picture element, and the screen (9) J2 deflects two sets of R and G.

Each phosphor of B is sequentially irradiated to emit light. In this conventional example, the deflection range is a width of two picture elements for each electronic beat %15.

The accelerating electrode (8) is composed of a plurality of conductive plates (19) installed horizontally at the same position as the vertical deflection electrode (4), and allows the electron beam to collide with the screen (9) with sufficient energy. Accelerate as if

The screen (9) is made up of a phosphor (20) that emits light when irradiated with an electron beam, which is coated on the back surface of a glass plate (2I), and a metal back layer (not shown). The phosphors (20) are phosphors of three colors R2O and B for one slit (14) of the control electrode (5), that is, for each one electron beam divided in the horizontal direction. There are two pairs of each, and the screen (9
) The dashed lines indicated in the vertical direction correspond to the plurality of lines p7 (2), and the two-dot chain lines correspond to the plurality of control electrodes (5). Indicates the horizontal division to be displayed. As shown in the enlarged view in Figure 2, one section partitioned by these two has R, G, and B phosphors (20) for two pixels in the horizontal direction, and 16 pixels in the vertical direction. It has the width of a line. The size of one compartment is, for example, 1 mm in the horizontal direction and 9 m in the vertical direction.In addition, in Figure 1, the length in the underwater direction is very large compared to the vertical direction to make it easier to understand. Please note that the image is greatly enlarged.

Moreover, in this conventional example, one control electrode (5), that is, one
For the electron beam of the book, R, G, B phosphors (20)
However, only one pair for two picture elements is provided.

[Moralon, ] picture, (・ko) or three or more picture elements may be provided, in which case the control electrode (5) has R, G, and B images for one picture element or three or more picture elements. The signals are applied sequentially and the horizontal deflection is synchronously applied.

Next, the basic configuration and waveforms of each part of a drive circuit for displaying television images on this display element will be explained with reference to FIG. First, a driving portion for irradiating 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 bias voltage (operating voltage) to each electrode of the display element.

The back electrode (1) has -V and the vertical loading electrode (3) has Vl.
, V 31 for the auxiliary electrode (3'), horizontal focusing electrode (6)
V5, accelerating electrode (8), ■9, screen (9)
Apply a DC voltage of ■.

Next, a composite video signal of a television signal is applied to the input terminal (23), and a synchronization separation circuit (2tl) separates and extracts a vertical synchronization signal V and a horizontal synchronization signal 1.

The vertical deflection drive circuit (40) includes a vertical deflection counter (2
5), a memory for vertical deflection signal storage (27), and a digital-to-analog converter C30 (hereinafter referred to as a D-A converter). Vertical deflection drive circuit (=
As the six pulses of vertical synchronization 1-T (1-T) shown in Fig. 71 and water 11-interval (li No. I) shown in FIG. V
The horizontal synchronizing signal H is counted.

This small direct deflection counter (25) is used for the vertical part of the revision period, the effective scanning period excluding the 1 period (in this case, 24
01-1 (assumed to be between 11) is counted, and this count output is supplied to the address of the memory (27).

The memory (27) outputs vertical deflection signal data (here, 10 bits) corresponding to each address, and the D-A
The converter (39) converts it into the vertical deflection signals υ and υ' shown in FIG. There is a memory address that is I + self α, L6H
By storing IAJ-regular data in the memory every minute, a 16-step vertical deflection signal can be obtained.

-, the gland cathode drive circuit (26) faces the vertical synchronization signal■! Using the output of the '11.51f'+1 counter (25), line cathode drive pulses a-o are created. Figure 5 (
(a) shows the relationship between the vertical synchronizing signal V, the horizontal synchronizing signal I (and the lower 5 bits of the vertical deflection counter (25)). FIG. A method of creating pulses a' to 0' is shown. Fifth
In the figure, I and SB indicate the lowest bit, (LSB+1)
tastes the bit one h higher than the LSB, 7J:.

The first line cathode drive pulse a' can be created by an R-S flip-flop using the vertical synchronization signal V and the output (LSB+4) of the mounting deflection counter (25), and the line cathode drive pulse b'~ O′ uses a shift register,
Line cathode drive pulse a' is superimposed on the deflection counter (25).
It can be obtained by transferring the inverted version of the output (L S B + 3) as a clock. This drive pulse I ~ 0' is inverted and converted into a cathode drive pulse M - O, which is inverted and has a low potential only during each pulse period, and a high potential of about 20 volts during other periods (see Fig. 3). (b) E), added to each line cathode (2a) to (20).

Each line cathode (2a) to (20) has its driving pulse a to 0.
The current is heated during 4 j: 1, and the heated state is maintained so that electrons can be emitted during the low potential period of drive i + pulse m o. Electrons are emitted from the 15 ER negatives +'lj (2, t) to (2o) only during the +6H period when low potential drive pulses a-o are applied to each.High potential is applied. During the period, the line cathode (
Place 2); line cathode (2a) to (
In addition to 20), the higher potential at 1 is more positive, so no electrons are emitted from the lines β6K(2a) to (20). Thus, in the line cathode (2), during the effective vertical scanning period, from one line cathode (2a) to the lower line cathode (20) 15) 1 period 11;
j electrons are emitted. The emitted electron is a back type j@
(]) and is pushed forward by the vertical focusing electrode (3
), it passes through the opposing slits (10) and is focused in the vertical 1α direction, becoming a 4-diameter, 1-cya P beam at fL.

Then, the line cathode drive pulse a~0 and the vertical deflection signal υ y
The relationship with + will be explained using No. 61-4.

The vertical deflection signals υ, υ′ are for each green shade (-pulse, 1 from 1 to 0).
During the 6H period, it changes by IH and changes to 16 steps. The vertical deflection signals υ and V' both have a center voltage of v4, and are configured to change in opposite directions so that υ increases sequentially and υ' increases one step;

These vertical deflection signals υ and υ′ are applied to the vertical deflection electrodes (
・The electron beams applied to the electrodes (13) and (+3') in 3), and as a result, generated from the respective line cathodes (2a) to (2o), are vertically deflected in 16 steps, resulting in the above-mentioned As shown above, on the screen (9)-H, one electron beam is deflected so as to sequentially draw a raster line of 16 lines one line at a time from the top.

As a result of the above, 15 green shades tJj (2a) to (2o),
Electron beams are emitted for a period of 16 hours starting from the one on the L side at a temperature of 1° C., and each electron beam is deflected sequentially by one line from top to bottom within 15 sections in the vertical direction, thereby forming a 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, creating a total of 240 lines.

The vertically deflected electron beam is controlled by
(It is divided into 181 do parts in the horizontal direction by (5) and Mizubo Shudong "i" 4 f tun (6) and taken out.
The figure shows one division of zonori. This electric F
For each section, the beam passes through the control electrode (5) for a number of times l! 'i is controlled by the horizontal focusing electrode (6).
The electron beam is focused into a single thin electron beam, which is then horizontally focused in 6 stages "11 (i.
R2O for 2 pixels on the screen (9) with 6 faces,!
3. Each phosphor (20) is sequentially irradiated. Figure 2 shows the divisions in the claw surface direction and water τμ force direction. Fluorescent material corresponding to (15-1) - (15-n) on the control electrode (5) at 1°C: R, G, B for 12 pictures, but for convenience of explanation, l
'-2 element is R4+G11 Bx, and the other is R2, G2.
Next, the horizontal deflection drive circuit (41) includes a horizontal deflection counter (28) (11 bits), a memory (29) storing the horizontal deflection signal, and a D-A converter (38). I bought it completely, and there is one. The input pulses of the horizontal deflection drive circuit (41) are vertically synchronized (1+ and /F, .
A pulse 6H is used in synchronization with the f' In1 period signal H and has a frequency <il jla that is six times that of the horizontal synchronizing signal H. The horizontal deflection link (28) is reset by the vertical synchronizing signal (2) and generates a horizontal 6-fold pulse 6H.

This]j<flat commercial counter (28) counts 6 times during IH and 240H×6/H=1440 times during ■■, and this count output is supplied to the address of the memory (29).

The memory (29) outputs horizontal deflection signal data (here, 8 bits) corresponding to the address, and the D-A converter (38) outputs it as shown in Figure 7 (Figure 3 (b) C). ,h'
is converted into a horizontal deflection signal such as In this circuit, 6
There is a memory address for storing the horizontal deflection signal corresponding to each of the 240 lines, and by storing 6 pieces of regular data for each line in the memory, a 6-step wave horizontal deflection signal is generated during the IH period. can be obtained.

This horizontal deflection signal is a pair of horizontal deflection signals ri and h' that change in six steps as shown in FIG.

In both cases, the center voltage is v7, h decreases lawfully, and h
' change in opposite directions as they increase sequentially. For these horizontal deflection signals, h' is 1t, horizontal deflection type k (7) ノYrX% (18) t(18'
) and in addition, Ibru. As a result, each horizontally partitioned electronic beano has a screen (9) during each horizontal period.
R,G.

B, r<, G, B (Rx-G engineering, B2.R2,G
2. In this way, in each line raster, the electron beam is irradiated for each of the 184 sections in the horizontal direction so that the fluorescence of B2) is irradiated every Mth H/6 period. □, G1. B□, R2, G2. B
Each of the two phosphors (20) is sequentially irradiated.

Therefore, the electron beams are set to R, , G for each horizontal section of each line.
,,13. , R2, G2. Each time it is modulated by the B2 video signal, a color television image 9t can be displayed on -1- of the screen (9).

In particular, we will explain the modulation control part of the electron beam. First, the composite video signal from h+i to the television signal input terminal (23) is input to the color demodulation circuit (30) and "p,"
iL, where the R-Y and B-Y color difference signals are demodulated,
The G-Y color difference r'+ is matrix-combined, and further combined with the luminance signal Y to output R2O and B primary color signals (hereinafter referred to as R, G, +3 video signals). Their R, G, and B each have an IQ of 4 (F is 1
84 sets of sample and hold circuits (31-1) - (3+-
n). Each sample hold circuit (31-1
)-(31-n) are for R□, G□, B, and
It features six sample and hold circuits for R2, G2, and B2. These sample and hold outputs are respectively applied to holding memories (32-1) to (32-n).

On the other hand, the reference clock oscillator (33) is composed of a PLL (phase-locked loop) circuit, etc., and in this conventional example, it is composed of 6 times the color subcarrier fsc l, % + ('Tri-lock 6fsc and 2 times the basic clock). The reference clock 2fsc is controlled to always have a constant phase according to the horizontal synchronization signal I (=12
) is added to the horizontal synchronization signal 1(6 times the signal 6Tl and 1−(/6 times the signal switching pulse rt+ gt+ 1
)++rz+gz+t)z (Fig. 3(b) B) is obtained.

On the other hand, the reference clock 6fsc is applied to the sampling pulse generation circuit (311), where it is delayed by a shift register by [clock] period, etc.
During the effective horizontal scanning period (approximately 50 μ5 ec) of 4 rotations 11ii (6:3.5 μ5 ee), 1104 sampling pulses 1 r 1 + G ,,
, B Yu 1 , R1□ , G, 2 ,
B E2, R21, G2□.

B,! llR221G221B, 2~Rnt, Gn,,
Bn11'Rn21Gn2. Bn2 (Figure 3(b)
A) are generated sequentially, followed by a transfer pulse of 1.1iA1. This sampling pulse R, ~B
n2 corresponds to each picture element when one line of the video to be displayed is divided into 368 picture elements in the horizontal direction, and its position is controlled to be always constant by marking it on the horizontal synchronization signal H. .

These 11071 sampling pulses R1□~Bn2
are each composed of 184 sets of sample and hold circuits (31-1
) to (old-〇), and as a result, 1 is added to each sample hold circuit (31-1) to (31-n).
When the line Q is divided into 184 lines, each 2 picture elements of I□, G1. B engineering, R2, G2. Each B2 video signal is individually sampled and held. The 184 groups of R, GL, and B that held the sample were
R2°G2. The video signal of B2 is stored in 184 sets of memories (32-1) -(
32-n), the signals are transferred all at once by a transfer pulse and held here for the next horizontal period. This retained R
4°G engineering Bl! The signals of R21a, , B2 are applied to switching circuits (35-1) to (35-n). The switching circuits (35-1) to (35-n) each have R, , G1 . It is constituted by a tri-state or analog gate having individual input terminals for B1°R2 and G21B2 and a common output terminal for sequentially switching and outputting them.

The output of each switching circuit (35-1) to (35-n) is 184 sets of pulse width modulation (PWM) circuits (37-1)
~(37-n), where the sample-held R,G,, B□l R,l G2. B. The reference pulse signal is pulse width modulated according to the magnitude of the video signal and output. The repetition period of the reference pulse (?3) is preferably sufficiently smaller than the pulse width of the signal switching pulses ri+ g□, b□, r2゜gzrbz, for example, about 1:10 to 1:100. are used.

The output of the pulse width modulation circuits (37-1) to (37-n) is used as a control signal for modulating the H beam to the 184 conductive plates (15) of the control electrode (5) of the display screen. −
1) to (15-n) individually. Each of the switching circuits (35-1) to (35-n) receives a switching signal (r++gt+bx+rxrg) applied from the switching pulse generation circuit (36).
Switching is controlled simultaneously by z+bz. The switching pulse generation circuit (36) generates a pulse rxr gt+ to the signal cut i+ from the deflection pulse generation circuit (42) mentioned above.
bx+ rxr gz+ t)z, each horizontal period is divided into 6, H/6 switching circuits (35-1) to (35-n) are switched, and R++
Each video signal of G, +nt+Rz+GZI BZ is outputted sequentially at hour/minute '1'pl b, and the pulse width modulation circuit (
37-1) to (:l7-n).

Note: What you need to do here is the switching circuit (:1
5-1) R,, a,; B in -(35-n)
,, R2゜"l'211L video signal ν] supply switching and electron beam R□, G by the horizontal deflection drive circuit (41)
□+ Bll Rz+G2. The horizontal deflection of the irradiation switching to the phosphor shown in B is synchronously controlled so that both the timing and the order match completely.

As a result, when the electron beam is irradiating the R1 phosphor, the irradiation wind of the electron beam is controlled by the R signal. R2, G2. B2 is similarly controlled, and R1, G1 . B engineering.

R2, G, , B2 The light emission of each phosphor corresponds to R1, G of that picture element.
,.

B engineering, R2, G2. Each picture element is controlled by the video signal of B, and each picture element is displayed by emitting light according to the input video signal. This control is for one line.
This is done simultaneously for 84 sets (2 picture elements each), and an image of 368 picture elements per line is displayed, 1 screen.

Furthermore, the processing is performed sequentially for 240H lines starting from the upper line, and one image is displayed on the screen (9)L.

The above-mentioned operations are repeated for each field of input television No. 18, and the results are as follows.

As with a normal television receiver, a television image of 1, 1 and 1 pixels is projected on the screen (9).

The drive circuit for the beam electrode control electrode (5), that is, the output section of the pWM circuits (37-1) to (37-n) will be explained in more detail with reference to FIG. The PWM and IL signals are amplified to a predetermined voltage for supply to the beam current control electrode (5). An example of this is a push-pull configuration using transistors (44), (45), etc., interposed between a power supply terminal (48) and a ground terminal (49), as shown in FIG. Of course, this configuration may be applied to other electric amplifiers. As mentioned earlier, this same RIG
In the conventional example, 184 circuits are required corresponding to each pwxi circuit (37-1) to (37-n).

For practical purposes, it is essential that it be integrated into an IC. On the other hand, each electrode is housed in a vacuum container and is insulated from each other, but in reality, a beam acceleration voltage of around loKV is applied, and there is a possibility that discharge occurs with the edge of the electrode. This also applies to conventional CRTs. Therefore, in order to protect the IC circuit, 1. A protective resistor (50
) must be interposed, and the transistor (44)
Protection diodes (46) and (47) are inserted in parallel with (45), respectively. However, depending on the state of the discharge, if the energy is large, it can lead to IC destruction.
Output terminal (52) and beam current control voltage if! Generally, a series protection resistor (5I) is connected between each of the conductive plates (15-1) to (15-n) in (5). On this occasion,
This has the disadvantage that 18/I protective resistors (51) are required, and the mounting space becomes extremely large.

OBJECTS OF THE INVENTION It is an object of the present invention to provide an image display device that eliminates the mounting space for the protection resistor mentioned in the conventional example and can maintain the protection function in exactly the same state.

Structure of the Invention In order to achieve the above object, the present invention forms a resistor by printing or the like on the outer surface of a container such as glass for storing an electrode and keeping it in a vacuum. In this case, the other end of the resistor can be directly connected to the terminal of the output IC with the lead without going through another circuit, and it is possible to connect the other end of the resistor directly to the terminal of the output IC with the lead, without using the protective resistor as in the conventional case. It does not require any mounting space.

DESCRIPTION OF EMBODIMENTS One embodiment of the present invention will be described based on the drawings. As mentioned above, the image display device spans several electrodes (
117, but the entire electrode is housed in a glass container (43) as shown in FIG. 9, and the inside is kept in a vacuum.

Each electrode lead is connected to each part 7 (i, j, '2 (
+5-1) - (15-n) extraction terminal (15-1)
Generally, it is taken out from the joint surface of the glass container (43) as shown in '~(15-n)'. Therefore, in No. 101A, 1) is printed on the outside surface of the glass container (43) to connect the take-out terminals (+5-1' to (15-1)).
Form the required number (184 in this example) of low antibodies (53) at the same pitch as 'n)', and form the required number (184 in this example) of low antibodies (53) at the same pitch as shown in FIG.
) as shown in contact l-ichigoku (51I), it i
Ill. Each of these resistors (53) and the extraction terminal (+5-
1)'-(15-n)' can be connected simultaneously using a thin lead or the like using a method such as seam welding.

Further, the other end and the output terminal (52) of the IC are connected by a normal lead wire or a flexible printed board. The resistor can be formed by printing a ruthenium oxide-based resistor paste and firing it.
), Qj, can be formed by a body.

Although the above description has been made regarding the external protection resistor of the beam current control electrode (5), it goes without saying that this embodiment can be similarly applied to all electrodes.

Effects of the Invention As described above, according to the present invention, unlike the case where it was necessary to mount a large number of protective resistors, no mounting space is required at all, and the protective effect can be completely obtained. and its practical value is extremely large.

[Brief explanation of drawings]

Figure 1 shows the internal configuration of the image display unit, Figure 2 is an enlarged view of the image display unit, Figure 3 is a block diagram showing the main configuration of the drive circuit, and waveform diagrams of each part. , Figure 4 is a diagram explaining the principle J''5 and timing of vertical deflection waveform generation, Figure 5 is a diagram explaining the principle J''5 and timing 'J of line cathode drive waveform generation, and Figure 6 is a line drawing. (・'+(jl, lme・pJ1 pulse, vertical deflection ii'+] signal, 121 showing the relationship between the horizontal deflection signal, FIG. 7 is a diagram explaining the principle of horizontal deflection waveform generation and the 1' timing, Fig. 8 is a circuit diagram of the output section of the circuit that drives the beam current control electrode, Fig. 9 is a perspective view showing an example of the configuration of the external extraction terminal of the beam current control electrode, and Fig. 10 is an embodiment of the present invention. An example is (I'7i) is a perspective view showing an example of the configuration of the external take-out terminal of the sub-beam lTt flow control electrode and the printed resistor formed on the outer surface of the tube.
jE and IA explaining the printed resistor and its contacts. (1) Back electrode, (2) (2a) to (20)... line cathode, (3) vertical focusing electrode, (3')... auxiliary electrode,
(4)...Mounted deflection electrode, (5)...Beam-U flow control electrode, (6)...Horizontal collection TEPCO t→j, (7)...Horizontal deflection electrode, (9)...Screen plate , (1=1)-・Control, E pole slit, (15-1) to (15-n)-Control city pole no'lead'lhi,(15-1)'-(15-n)''-
Control electrode conductive ν extraction terminal, (16)...horizontal focusing electrode slit, (20) = -phosphor, (37-1) ~
(37-n)-pulse width modulation (PWM circuit), (-
13) - Glass capacity: ÷, (53) Print resistance, (5
4)... Printed resistance contact +-: a pole agent Yoshihiro Morimoto Figure 5 (b) Cp Figure 4

Claims (1)

[Claims] 1. Both surfaces of the screen are vertically divided into a plurality of sections, and a source for generating an electron beam is provided in each vertical section, and the electron beam is sequentially deflected in the vertical direction for each vertical section. In the electron beam path from the electron beam generation source to the screen, an electron beam passage hole or slit is provided which is divided into a plurality of sections in the horizontal direction. Further, an electrode is provided to control the emission intensity by controlling the amount of the electron beam irradiated onto the screen in accordance with a video signal, and further electrodes are provided for deflecting the electron beam in the horizontal direction for each horizontal section. An image display element that enables color reproduction by horizontal deflection by applying different phosphors or other light-emitting substances on the screen depending on the horizontal deflection position is provided, and a glass that houses all the above structures and is kept in a vacuum. A resistor is formed on the outer surface of the container by printing or other means, and a lead provided to obtain electrical continuity from the housed electrode to the outside is directly connected to the resistor. image display device.