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JPS4942336

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DESCRIPTION JPS4942336
Display using a Korean Electric Wire Tube 0 Japanese Patent Application No. 45-619790
Application No. 45 (197o) July 16 @ inventor Nakasachi Fumi Uenocho Ise-shi Wada 700 Ise
Electronics Industry Co., Ltd. ■ Applicant Ise Electronics Industry Ise City Ueno-cho, character
Wada 700 [Fa] Agent patent attorney Masaki Yamakawa
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a display apparatus using a
cathode ray tube according to the present invention, and FIG. 2 is an X axis matrix electrode and
a Y axis matrix electrode of the cathode ray tube of FIG. Wiring diagram showing the
relationship, FIG. 3 is a diagram for explaining the operation of the matrix electrode of FIG. 1,
FIGS. 4 to 6 are waveform diagrams of each part of the block diagram shown in FIG. 1, FIG. FIG. 8
shows an example of a pattern displayed on a cathode ray tube, and FIG. 8 is a block diagram
showing another embodiment of a display device using a cathode ray tube according to the
present invention.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a display device
for storing information such as characters, numbers and symbols stored and stored in a storage
device such as a computer according to a predetermined signal, and in particular to a matrix
electrode. The present invention relates to a display device using a cathode ray tube using The
enlargement and reduction display device generally used in the past is called a rask method, and
the display device using this rask method sequentially scans a single electron beam vertically or
horizontally, and the electron beam comes to a desired position. Occasionally, the luminance is
raised to cause the fluorescent surface to emit light, and this light emitting portion constitutes a
part of the pattern. Therefore, in order to display one pattern, it is necessary for the electron
beam to scan several times to several tens of times, which causes the deflection signal to have a
high frequency of W111111. And when expanding and reducing a pattern using such a method,
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it is carried out by varying the deflection signal of high frequency, but in this case the deflection
signal is changed to change the level of the deflection signal of high frequency. It becomes
unstable and the displayed pattern becomes unclear. In addition, it is extremely difficult to
change the level of the above-described high frequency deflection signal, and the circuit becomes
complicated and expensive. When the present invention displays a single pattern using a cathode
ray tube incorporating a matrix electrode in order to eliminate the above-mentioned drawbacks,
the scanning of the electron beam is not required and the expansion and contraction of the
pattern is achieved by the matrix electrode of the cathode ray tube. It is intended to provide a
display apparatus using a cathode ray tube in which the voltage applied to the electrode disposed
on the fluorescent surface side is simply changed and the deflection signal of low frequency is
made variable to align the displayed pattern. This will be described in detail using the following
examples. FIG. 1 shows an embodiment of a display apparatus using a cathode ray tube
according to the present invention, in which 1 is a storage unit, 2 is a buffer register connected
to the storage unit 1 and 3 is a buffer register 2 The connected decoder 4 is a pattern storage
unit. The pattern storage unit 4 stores 71 characters of letters, numerals and symbols in advance
by a diode matrix corresponding to a matrix electrode inside a cathode ray tube described later.
Reference numeral 5 denotes a counter connected to the pattern storage unit. The counter 5
generates a predetermined number of pulses in synchronization with the signal of the clock pulse
generation unit 6. 7, 8 and 9 are connected to the decoder 3 respectively.
It is a 2nd and 3rd DA conversion part. 10 is a position designation unit connected to the
decoder 3, 11 is a fourth DA conversion unit connected to the position designation unit 10, and
12 is a cathode ray tube. The cathode ray tube 12 is connected to a first grid electrode 12b1
[1111111EndPage: 1 counter 5 connected to the cathode electrode 12a1 third DA conversion
unit 9] X axis matrix electrode 12d1 connected to the Y axis matrix electrode 12c1 pattern
storage unit 4 A second grid electrode 12 e connected to the second DA converter 8, a focus
electrode 12 f connected to the first DA converter 7, and a deflection coil 12 g disposed at the
neck portion. Reference numeral 13 denotes a high voltage generating unit, which supplies a
high voltage to the cathode ray tube 12. The lock pulse generation unit 6 sends synchronization
signals to the storage unit 1, the buffer register 2, the decoder 3, the counter 5 and the position
designation unit 10. Here, the Y-axis matrix electrode 12c and the X-axis matrix electrode 12d
will be described in more detail. The dotted line 14 in FIG. 2 more specifically shows the
structure of the combined portion of these electrodes. In the figure, y □ to y5 are strip-like Yaxis matrix electrode bodies, and each of these Y-axis matrix electrodes y1 to y5 has seven holes
15y formed at equal intervals, and these are on one plane Are equally distributed. Further, X0 to
x7 are X-axis matrix electrode bodies, and these X-axis matrix electrode bodies X □ to X7 have
five holes 15x formed at equal intervals, and these are equally distributed on one plane There is.
The X-axis matrix electrode 12 d and the Y-axis matrix electrode 12 c are disposed to be
orthogonal to each other. Holes 15x and 15y formed in the respective X-axis matrix electrode
bodies X1 to X7 and Y-axis matrix electrode bodies y1 to y5 are arranged coaxially at the
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intersections in this case, and they are separated by a fixed distance from each other. In the state,
it is disposed in the neck portion of the cathode ray tube 12. Between the X-axis matrix electrode
12d and the Y-axis matrix electrode 12c is disposed a shielding plate 16 having a hole of the
same diameter at the position of the holes 15x and 15y formed in the X- and Y-axis matrix
electrodes 12c and 12d. The electrons emitted from the cathode 12 a pass only through the
holes 15. Next, for example, the case of displaying the number "2" will be described. Note that in
FIG. 3, the symbol · indicates the selected matrix intersection of the matrix electrodes, and the
symbol ○ indicates the unselected matrix intersections of the matrix electrodes.
In this case, as shown in FIG. 2, a diode matrix portion displaying the numeral 12 "of the pattern
storage unit 4 is used. In the figure, 17 to 21 are Y-axis groove lines connected to rl 111 111 to
Y-axis matrix electrode bodies y1 to y5, and 22 to 28 are X-axis groove lines connected to X-axis
matrix electrode bodies X □ to X7, 29 to 42 is a diode connected so as to supply a signal
indicating the numeral "2" to the matrix electrode 12 between the Y thin wires 17-21 and the Xaxis groove lines 22-28, and 43-47 are resistors. Under such a configuration, when pulses of
positive potential as shown in FIG. 4 a ′ ′-e are sequentially applied to the conductors 17 to
21, they are disposed at intersection points corresponding to the pattern to be displayed on the
diode matrix. Both electrodes at the intersection of the Y-axis matrix electrode bodies y1 to y5
and the X-axis matrix electrode bodies X1 to X7 corresponding to the diodes 29 to 42 via the
diodes 29 to 42 have a desired positive potential. As a result, electrons emitted from the cathode
electrode 12a to the entire surface of the X-axis matrix electrode 12d and the Y-axis matrix
electrode 12c are formed at the intersection where both the X-axis matrix electrode 12d and the
Y-axis matrix electrode 12c have positive potential. A pattern of numeral "2" is displayed on the
fluorescent surface through the holes 15x and 15y. In the X and Y axis matrix electrode body
shown in FIG. 2, one pattern is displayed by 5 × 7 = 35 dots. Next, the operation of each part of
FIG. 1 using the cathode ray tube 11 of the above-described structure will be described. The
storage unit 1 is a storage unit of an information device such as a computer, and among the
information stored in the storage unit 1, information to be displayed is sent to the paranoia
register 2. Note that this information includes signals that specify the pattern, size and position.
The buffer register 2 temporarily stores the information from the storage unit 1 and then sends
the information to the decoder 3. The decoder 3 analyzes the output of the buffer register 2 into
a pattern selection signal, a scaling signal and a position designation signal, and the pattern The
selection signal is supplied to the pattern storage unit 4. The counter 5 synchronizes with the
pulse signal of a fixed cycle generated by the clock pulse generator 6 and generates pulse signals
shifted by a fixed time as shown in FIG. 4 a ′ ′-e. These pulse signals are supplied to the
selected pattern storage portion of the pattern storage unit 4, for example, to the lead wires 17 to
21 of the pattern storage unit 4 of FIG. 2, and also to the Y-axis matrix electrode 12c of the
cathode ray tube 12. Be done.
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Conductors 22 to 28 [111111] EndPage: 2 corresponding to the selected pattern of the pattern
storage unit 4 are connected to the X-axis matrix electrode 12 d of the cathode ray tube 12. As a
result, only the selected pattern of the pattern storage unit 4 according to the output signal of
the counter 5, for example, the holes corresponding to the diodes 29 to 42 of the pattern storage
unit 4 of FIG. The selected pattern of the pattern storage unit 4 is displayed on the fluorescent
surface of the cathode tube 12 by the combination of dots. On the other hand, the position
designation signal of the decoder 3 is supplied to the position designation unit 10, and then
converted into an X-axis deflection signal (see FIG. 5C) and a Y-axis deflection signal (see FIG. 5)
by the fourth DA conversion unit 11. It is supplied to a deflection coil 12g formed at the neck
portion of the rear cathode ray tube 12. Therefore, the height of one small step of the X-axis
deflection signal shown in FIG. 5a corresponds to the horizontal position at which one pattern is
displayed, and the sawtooth wave formed by the small steps is one row of the displayed pattern.
Show. The height of the Y-axis deflection signal shown in FIG. 5 corresponds to the vertical
position of the displayed pattern. Therefore, the position designation unit 10 and the fourth DA
conversion unit 11 function as a position control unit that controls the position of the displayed
pattern. The operation will be described for enlargement and reduction of the pattern to be
displayed next. 6a and 6b (The enlargement / reduction signal of the decoder 3 shown here is
supplied to the first DA converter 7, the second DA converter 8 and the third DA converter 9, and
these DA converters are analog signals of a predetermined size. I. FIG. 6C is supplied to the focus
electrode 12 f and the second grid electrode 12 e of the cathode ray tube 12 converted to the
same level (to simplify the explanation). As a result, the lens system of the focusing electrode
composed of the plus electrode 12f and the second grid electrode 12e is changed, and the
pattern displayed by the multiple electron beam is enlarged or reduced. Therefore, the amount of
enlargement and reduction can be changed by the level of the signal applied to the focus
electrode 12f and the second grid electrode 12e. Note that the brightness of the fluorescent
surface changes in the case where the electron beam is expanded and reduced, and in the case
where the electron beam is expanded, it becomes bright when it is reduced by one dark beam. A
third DA converter 9 is provided to solve such a problem. The third DA converter 9 converts the
enlargement / reduction signal sent from the decoder 3 into an analog signal and applies it to the
first grid electrode 12 b of the cathode ray tube 12.
Therefore, the third DA converter 9 increases the amount of the electron beam irradiated from
the cathode electrode 12a to the Y-axis matrix electrode 12c and the X-axis matrix electrode 12d
when receiving the enlargement signal 11111111, and when receiving the reduction signal, By
reducing the amount, the brightness of the pattern displayed on the fluorescent surface is made
constant. Also, as described above, if only enlargement or reduction is performed, a part of
adjacently displayed patterns may overlap, or the spacing between the patterns may not be
constant and unnatural. For this purpose, it is necessary to align the displayed patterns even
when enlarged or reduced. The arrangement of enlarged or reduced patterns will be described
below. The above-mentioned enlargement / reduction signal of the decoder 3 is supplied to the
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position designation unit 10 described above. Here, for example, when converted into an analog
signal, when the enlargement signal 45 shown in FIG. 5C is supplied to the position designation
unit 10, the position designation unit 10 controls the position designation signal according to the
enlargement signal. As a result, the X-axis deflection signal f (see FIG. 5 a) which is the output of
the fourth DA converter 11 is the level of the portion corresponding to the time T13 to T □ 5
and T2O ”T29 of the magnifying signal (see FIG. 5C). As a result, as described above, the
difference between the X-axis deflection signal and the step corresponds to the pattern-to-pattern
interval, and the pattern-to-pattern interval becomes wider. Also, the Y-axis deflection signal (see
FIG. 5) has its level lowered during time T13 to 'I' 15 and T2O-T29 in response to the
enlargement signal (see FIG. 5C), resulting in an enlarged pattern At the central portion, the
degree of deflection decreases corresponding to the magnification. FIG. 7 shows an example of
the enlarged and reduced display pattern, and time T. -Tlo indicates the upper number, time 'f "io
to' I" 20 indicates the middle alphabet, and time T20-T29 indicates the lower number. Therefore,
the pattern interval can be kept constant by setting the enlargement signal and the X-axis
deflection signal in a predetermined relationship, and, as described above, it is possible to set the
Y-axis deflection signal and the enlargement signal in a predetermined relationship. As shown by
the pattern JABCDEFGHIJj on the second line from the top of the figure, the pattern can be
displayed on a straight line even when a part is enlarged. In the above description of the
arrangement, when the pattern interval and the lower end of the pattern are aligned in the case
of enlargement (as described above, the relationship between the enlargement and reduction
signal and the X axis deflection signal, and the enlargement and reduction signal and Y axis
deflection signal is changed [ 111111 EndPage: 3 allows the top of the pattern to be displayed in
a straight line, or the spacing of the pattern can be changed by changing the magnification of the
pattern.
FIG. 8 shows another embodiment of a display apparatus using a cathode ray tube according to
the present invention, and the difference from FIG. 1 is that the scaling circuit of decoder 3 is
converted to an analog signal using DA converter 49. , And supplies the analog signal to the
focus electrode 12f through the focus voltage control unit 50, and supplies the analog signal to
the second grid electrode 12e through the second grid voltage control unit 51, and further the
first grid voltage control unit 52. It supplies to the 1st grid electrode 12b via it. In this way, it is
possible to combine the DA converting units provided in the first DA converting unit 7, the
second DA converting unit 8 and the third DA converting unit 9 shown in FIG. 1 into one. As
described above, according to the display device using the cathode ray tube according to the
present invention, the method of displaying a pattern at a time by a large number of electron
beams is used, and thus the scaling signal is converted into an analog signal. The pattern can be
easily enlarged and reduced only by adding it to the electrodes that make up the lens system.
Also, according to the present invention, the operation is stable and the circuit is simplified since
the signal used for enlargement and reduction has a very low frequency as compared with the
conventional Rask system. Furthermore, according to the present invention, the deflection
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frequency is low because deflection is performed in units of one pattern, and the frequency of the
low deflection signal is controlled to correspond to the scaling signal to control the interval of the
displayed pattern. can do. Further, according to the present invention, since the frequency of the
deflection signal is low, the level control of the deflection signal is easy and the operation is
stable. Furthermore, according to the present invention, by keeping the brightness of the
enlarged and reduced patterns constant, it is possible to obtain various excellent effects such as
11111111 and fewer adjustment points.
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