WO1988001422A1

WO1988001422A1 - Bar graph display system

Info

Publication number: WO1988001422A1
Application number: PCT/JP1987/000613
Authority: WO
Inventors: Masakiyo Ishioka; Isamu Ikeda; Naoto Kobayashi; Hiroshi Kuroda; Toshihiko Murata
Original assignee: Soar Corporation
Priority date: 1986-08-18
Filing date: 1987-08-17
Publication date: 1988-02-25

Abstract

A bar graph display system in which a measured quantity is converted into a digital signal through an A/D converter circuit and is input to an operation circuit, the measured quantity being operated by the operation circuit together with the data input from a key interface circuit to form into a data for display, and in which the data for display is input to a display unit which has a scale display part and a bar graph display part, thus displaying said measured quantity in terms of a bar graph.

Description

Details

1. Name of invention

Bar graph display device

Technical field

The present invention relates to a bag graph display device of various measuring instruments for displaying measurement data electrically. North

冃 Landscape technology

A conventional display device that displays the amount of electrical analog in a bar graph reads the scale with a fixed amount of change in the amount of the graph. .

For this reason, if multiple measurement scales are used to read various measured quantities using the same bar graph display, it takes time to read a numerical value by selecting a scale. There were drawbacks. In addition, the degree of division of the bars in the bar graph display is difficult to be extremely subdivided in terms of cost and technical aspects, and there is a limit to the display. Therefore, it is said that it is not suitable for a case where a high-precision display is required, because the accuracy is not higher than the analysis capability of the base.

However, the bar graph display shows the high reliability without mechanical parts, the visibility of constantly changing quantities or relative quantities, and the effects of installation conditions. It has the advantage that it does not receive and has a high response speed b.

Therefore, the present inventors have set the eye set corresponding to the bar graph. If the scale and numerical values can be changed according to the measurement purpose, there is no need to multiplex the bar graph, and the fixed display of the measured value, the maximum value of the measured value and the current value By displaying the measured value at the time of the measurement and the enlarged display of the measured value, it is possible to improve the analysis performance in the bar graph. It was found. Disclosure of invention

Accordingly, one object of the present invention is to provide both a single bar graph formed with a large number of segments and a unit value whose display can be changed. When activated, it will provide a new graph display which can display the measured values immediately.

Another object of the present invention is to expand the predetermined scale range in the normal mode displayed on the bar graph by switching the mode by key input. An object of the present invention is to provide a bar graph display device capable of displaying and displaying a measurement value with higher accuracy than the measurement display by the bar in the normal mode.

Furthermore, another object of the present invention is to arrange the Gument electrodes forming the bar graph as closely as possible without being influenced by the wiring, and the continuity of the display is generated. An object of the present invention is to provide a bar graph display device provided with a liquid crystal bar graph that improves display accuracy.

The last purpose of the invention is to provide the above-mentioned graph display device so that the measured quantity can be displayed as a length, and the range can be displayed. To display the scale corresponding to the This makes it easier to read the measured value and can be used for digital testers that show at a glance the fluctuating or relative measured values. It is intended to provide a bar graph display device.

According to the present invention having the above object, a measured amount is input to an arithmetic circuit as a digital signal by an A / D conversion circuit, and the measured amount is keyed by the arithmetic circuit. The input data input from the interface circuit is calculated and used as display data, and the display data is calculated.

-Input the data to a display having a scale display section and a bar graph display section, and display the above measured quantities in a bar graph.

The AZD conversion circuit is composed of an integration circuit to which the amount of electrical analog is input, a comparison circuit and a counting circuit, and each circuit is based on a signal from the oscillation circuit. It operates under the control of a control circuit that performs timing adjustment on a circuit block, and the measurement is input as an electrical analog amount. The quantity is converted to a digital signal.

The above arithmetic circuit performs various arithmetic operations based on information data based on a digital signal input from a key interface circuit. The above control circuit is controlled according to the necessity of section information.

The number of segments of the display bar in the bar graph display section is a multiple of 10 or 2 with respect to the scale scale, and the scale display is segmented. The number of digits can be displayed as a number from 0 to 9 depending on the number of digits, and the number of digits displayed on one scale is the same as the maximum number of digits on the scale.

In addition, liquid crystal display bars have a large number of panels on two glass plates. --Thin plate-shaped electrodes are applied in parallel, liquid crystal is sealed between the electrodes, and the electrodes are formed to be long in one direction, and the upper electrode group is composed of the required number of electrodes in each unit electrode. Each of the unit electrodes is electrically independent of the other, and the lower electrode group is electrically independent of each other. Brief description of the drawing

The drawings show the bar graph display device according to the present invention. FIG. 1 is a block diagram of the device, FIG. 2 is an explanatory diagram of a scale display, and FIG. 3 is a normal display mode. FIG. 4 is an explanatory diagram of an enlarged display.

FIG. 5 is a cross-sectional view of an ordinary liquid crystal display, FIG. 6 is a diagram illustrating wiring of a conventional electrode, and FIG. 7 is a diagram illustrating an electrode for displaying graphs using conventional wiring. .

FIG. 8 is an explanatory view of electrode wiring of the liquid crystal display in the bar graph display device of the present invention, and FIG. 9 is a plan view of the display plate in the same manner.

FIG. 10 is a front view of a digital tester provided with the bar graph display device of the present invention, FIG. 11 is a front view of a liquid crystal display, and FIG. 12 is a longitudinal section thereof. FIG. 13 is a layout view of the display pattern.

BEST MODE FOR CARRYING OUT THE INVENTION In the figure, reference numeral 1 denotes an integrating circuit to which an electric analog amount is input. 2 is a comparison circuit, 3 is a coefficient circuit, and these circuits constitute an AZD conversion circuit.

The AD conversion circuit operates under the control of the control circuit 4, and converts the measured amount input as the amount of electrical analog from the analog to the digital data. To a digital signal. Further, the control circuit 4 controls timing adjustment and the like for each circuit block based on the oscillation from the oscillation circuit 5.

The digital signal is input to an arithmetic circuit (CPU) 7 via an interface circuit 6. The arithmetic circuit 7 performs various arithmetic operations based on digital signals (registration information and function information) input from the key interface circuit 8. To process the input data into display data and output it. On the other hand, if the function information etc. input to the arithmetic circuit 7 is necessary, the The control circuit 4 is controlled via the turn signal 9.

The display data is output as a digital signal to a digital display circuit and a bag display circuit having a similar configuration. Each of these circuits is an interface circuit 10, 11, a display data register 12, 13, and a data code display drive. Circuits 14 and 15 are connected in this order. One of the decode display drive circuits 14 is connected to the scale display section 17 of the display 16. Connected, and the other decode display drive circuit 15 is the bug of display 16 Connected to luff display 18.

Although the AZD conversion circuit and the bar graph display circuit are omitted in FIG. 1, they are connected via the interface circuits 6 and 11, and The measured quantity can be displayed as a bar graph without passing through the calculation circuit 9.

Among the above circuits, arithmetic circuit 7, interface circuit 6, 9, 10, 0, 11, display data register 12, display display drive circuit 14, etc. A chip microcomputer is used, and other circuits can be integrated in a chip LSI.

The scale display section 17 of the display 16 has electrical display means such as scale scales 17a, numerical values 17b, and symbols 17C for each range. It is stored. As these display means, liquid crystal, light emitting diode, fluorescent light, plasma, and the like are used.

The number of segments in the bar 18a for the bar graph display section 1δ is 10 or fc, which is a multiple of 2 for the 7-scale scale 17a. Usually, however, 100 or 200b is preferred. The scale display can show numbers from 0 to 9 depending on the number of 7 tz increments, and the number of display digits for one scale corresponds to the maximum number of digits on the scale. .

As shown in Fig. 2, the scale display by each range is determined by determining the scale scale S / Sn and the unit corresponding to the range key input data, as shown in Fig. 2. Store these in a table in advance. Assuming that the number of display scales is η + Ί (including 0), if there is a change in the range key input data, the scale scale SJ to S Extract ₅ and display the scale. Alternatively, store only the full scale graduation Sn in the table and perform the following calculation and display it.

1

S S n

n

S S n

n

Displays ^{one of the} symbols 17c above depending on the unit on the Sn or table.

In the bar display in the normal display mode, since the measurement data originally has a resolution that can be enlarged and displayed, this is set to X, and the bar to display this X is displayed. As shown in Fig. 3, the number of full-scale segments is SG, the enlargement ratio in the enlargement mode is N, and the number of display scales is (where n is 1). in the normal mode against the full shaved Lumpur input data X _0, or et al reduction ratio Ru Oh is only I that displays in s G is

S G 1

X ₀ N

X ₀ = N ♦ SG).

The data just entered is for full scale X

0 When X is taken, (XX :) the displayed segment B of the bar

1 Rounded to the nearest ZN X

B = C + 0.5) 2)

N If the full scale of the scale displayed at this time is Sn, the other scales are displayed as follows.

S n

S 1 =

n

2Sn

S 2 =

n Data SX read from the bar and the scale displayed in this way are

B

S = S n 3)

S G Naru α

In addition, a predetermined scale range (hereinafter referred to as a window) in the normal mode can be magnified as shown in Fig. 4 by switching the mode by key input. And can be done.

Split of the enlarged range (c fin de c) against the full-scale S _n

1

If the unity is the same, the size of the window is

SGNX _n

Is 11 and in the expansion mode it is 1 S G =-°-.

M M M

Conditions when the range when the window is enlarged does not exceed the number of segments SG N ≤ M

Also, from the relationship with the scale position, the condition for matching the window division (lower limit) with the scale position

N

S G S G

M n

N a

(-An integer from 1 to n) 4)

M is determined so that each of the above conditions is satisfied.

In order to use all segments SG fully when expanding, M

= Not good if Re to the N _u

To display the bar at the center of the scale when zoomed in, use the

X

Since the value of half of ゥ is ゥ left of the window

Two

X

It is good to set the value of (total limit) to ..

2 M

X

However, when X, L i 0

2 M

X X

Tongue of X ≥ X 0 L ·]-= X 0-

2 2

However, this position must match the scale, so the window position is determined by the following processing. X 0

Since the value of the scale position at the time of enlargement is a multiple of η

X

Closest to L ₁ ΰ £ L

Is a positive integer such that

Π Ν

; ,,

Fu

X

L = J2 (the leftmost value of the window)

η ♦ Ν

5) The bar display value X at the time of enlargement is

X = χ — calculated as 6)

The scale display can be rewritten as follows.

S

Scale value at the left end of the window D | _ = J2

η · Ν

S

D (i + 1)

η Ν

S

D = (i + 2)

n * N

S

D _α = (i + a)

n ♦ N The value s read by the bar and the scale thus displayed is

S

S D + X

X

S X S n

+ (X-ί) ♦ —— n ♦ N η Ν X n

X

s

X 0

Become

The condition of ϋ

X

₁と and く which are closest to L ₁ and larger than L ·!

n N

X

♦ and n N which are the closest to L and smaller than L

It can be freely selected.

The above window can be moved in a fixed amount in the increasing direction or fc in the decreasing direction by the key input in the expansion mode. The minimum unit of the movement amount is one block between the scales. Assuming that the maximum movement W with respect to the input data X is: One two

X

w β

n N β is an integer of 1 α and determines the magnitude of the movement amount. j3 = 1

X

W

n N Display data after window movement X _M

X

0 0

X X u

n N

Decreasing direction

Scale (window movement)

Incremental direction ゥゥを Scale value after movement is D! … D _α

Decreasing direction

Window movement) Increase direction

It becomes. The movement of this window moves a fixed amount each time the input key is pressed, but if the input key is kept pressed, the window moves continuously. Repeat for.

FIGS. 5 to 9 show a liquid crystal display used as the above-mentioned bar graph display section 16.

Normally, as shown in Fig. 5, a liquid crystal display has a liquid crystal 105 between transparent electrodes 103 and 104 applied to upper and lower two glass plates 101 and 102, respectively. When the liquid crystal 105 is sealed, the change in the transmittance of the liquid crystal 105 caused by the voltage can be confirmed by the polarizing plates 106 and 107 provided on the glass plates 101 and 102. It is not displayed.

At this time, the display patterns are mainly numbers, characters, symbols, etc., and as shown in FIG. 6, the wiring of the electrodes 103 forming the numbers is made of each segment. Wiring 108 is provided between the members.

Therefore, in order to perform the No-Graph Table 7J, as shown in FIG. 7, a large number of thin plate-like electrodes 11 1 and 11 2 are provided, and S When the display pattern is formed and each electrode is connected by the above-mentioned conventional wiring -f stage, the wirings 11 and 13 are fixed at regular intervals. In this case, a gap 1 14 is required, and a gap 1 15 is also required in the lower electrode 1 12 accordingly.

For this reason, the display pattern of the upper electrode 1 1 1 loses continuity and τ, and the resulting bar graph becomes intermittent and becomes a display. However, there is a problem that the display pattern is formed longer than the number of electrodes.

Such a problem can be solved by changing the wiring method of the upper electrode, as shown in Fig. 8. In FIG. 8, reference numeral 21 denotes an upper electrode group, in which a number of thin plate-shaped transparent electrodes 21a, b, c are applied in parallel to a glass plate. It becomes. Reference numeral 22 denotes a lower electrode group, which is placed in the same position as the upper electrode group 21 and is applied in parallel to another glass plate, and a liquid crystal is sealed between these two electrodes. Then, a display pattern 28 long in one direction shown in FIG. 9 is formed.

The upper electrode group 21 is connected in series by wirings 23, 24, and 25 as a unit for each of the three electrodes 21a, b, and c. This connection is made alternately at both ends of the electrode for each unit, and they are densely spaced at equal intervals as far as each electrode comes out.

The lower electrode group 22 is also connected in parallel to the upper electrode group 21 by the wiring 26 in units of three lower electrodes 21 a, b, and G.

Although illustration is omitted, the lower electrode group 22 may be configured to have one electrode plate per unit.

In the upper electrode group 21, when power is supplied to the wiring 23, power is supplied to all of the electrodes indicated by oblique lines connected by the wiring 23. However, when current is applied only to the upper electrode group 2 side, no voltage is applied to the liquid crystal, and only when the lower electrode group 22 is energized at the same time, a voltage is applied to the liquid crystal. Since a change occurs in the alignment state, and the polarizing plate looks black, the current is not applied to all of the lower electrode groups 22. There is no sign that appears at each position shown.

Therefore, in the bar graph display, the upper electrode group 21 under energization is denied by energization to the T and negative electrode groups 22. In other words, when the energization to the lower electrode group 22 is limited to the hatched electrodes 22a, b, and c, the upper electrodes 21a, b, and c are displayed as black. .

In addition, as shown in FIG. 9, the display of the first graph is equal to the positions of the respective electrodes of the upper electrode group 21 forming the display pattern 28. It can be read by the scale graduation .29 of section 27.

Fig. 1 () The following figures show the measurement of voltage, current, resistance, etc. made using the bar graph display device of the present invention. It shows a Tal-type tester.

The block 201 is a box-like tester body, which is omitted in the drawing, but contains a bar graph display device and a power supply as shown in Fig. 5 inside. is there . A display unit 202 and a display operation unit 203 are provided on the surface.

The display unit 202 is provided with a liquid crystal display device 221. As shown in FIGS. 11 and 12, this liquid crystal display 22 1 has two transparent glass display plates 22 2, 2, similar to a normal liquid crystal display. A liquid crystal 224 is sealed between the substrates 23 and 23, and the inside of the display panels 22 and 23 has a graph display pattern shown in FIG. There are a scale 2 2 5, a scale 2 2 6 and a number 2 2 7 unit notation 2 2 8.

Of the above display patterns, the scale graduations 2 26 are printed on the inner surface of the upper display panel 22 2, and the other display patterns are displayed on the upper and lower display 扳 2 The segments 22, 22, and 22 are formed by transparent electrodes attached to the inner surfaces of 22 and 23. The bar graph display pattern 2 25 has a large number of segments 2 25 a and 22 5 a. … Are closely arranged in the direction of the model, and they are formed by connecting the segments in series. 229 is a polarizing plate.

A rotary switch 231 is provided at the center of the display operation section 203, and a power switch 232 and a data switch are provided at a portion in contact with the display section 202. Operation switches, such as a hold switch 233, an enlarged display switch 234, and a max hold switch 235, are provided.

The rotary switch 231 described above is constructed by changing the numerals 227 of the scale 226 and the unit symbol 228 so that the respective switches for DC voltage, DC current, AC voltage, resistance, etc. Used when switching (full scale value).

The data display / red switch 233 is used when the measured amount displayed in the graph is to be displayed as it is, and the enlarged display switch 233 is used. Reference numeral 234 is used to change the display of the number 227 on the scale 226 to further enlarge the measurement data 拡大. Further, the mask-hold switch 235 is used for fixedly displaying the maximum value of the measurement quantitatively displayed on the bar graph.

236 is an input terminal in the figure.

In such a digital type tester, a liquid crystal display 321 having a bag shift display pattern 225 is provided on the display section 202, and the measured amount is measured by a bar graph. Numerical indications can be read at a glance, as they can be read from the scale display and the scale. By displaying each graduation in response to the operation key, it can be used like a conventional analog tester.

ο 5

-7-

There is no need to select and read the scale corresponding to the current range from several scales, and the digital tester can be used. It has the same effect as a NALOG type tester. Industrial applicability

As described above, this invention is based on the bar graph divided into a large number of segments and the numerical value of the scale scale that can be changed according to the bar graph. From a display having a unit symbol and a circuit for electrically switching or enlarging the various displays on this display, it is possible to display information in a graph. In addition, the scale that matches the input data is selected and displayed electronically, so that it is easy to read, and the scale is enlarged and displayed in a graph. However, since the display accuracy is greatly improved, it is widely used as a display device for various meters.

Five

Claims

The scope of the claims

An A / 'D conversion circuit that converts the measured amount input as the electrical analog input amount into a complete signal, and the above measured amount and the key based on a digital signal. An arithmetic circuit (CPU) for processing information data based on a digital signal input from the interface circuit into display data and outputting the processed data; Digital table and small circuit to which the table output from the arithmetic circuit is individually input and bag: Huff display circuit and information data input to the arithmetic circuit A circuit that controls the A / D conversion circuit based on the signal from the oscillation circuit, which is controlled by the controller, and a digital display circuit that decodes the digital signal. Scale display unit connected to the display drive and connected to the decode display circuit of the graph display circuit. fo bar graph A bar graph characterized by comprising a display unit having a display unit.

¾

Your place.

2. The bar graph display device described in the claim, wherein the arithmetic circuit is connected to another circuit via an interface.

3. The interface circuit, the digital display circuit, and the buffer graph circuit are configured with one chip microcomputer, and the other circuits are configured with one chip. The bar graph display device according to claim 1, wherein the bar graph display device is integrated in a LSI.

4. The above bar-graph display is a single bar graph of liquid crystal formed by arranging a number of thin plate-shaped transparent electrodes in a long line. The display pattern, the scale graduation set along the paragraph display pattern, and the scale graduation set on the scale graduation 2. The bar graph display device according to claim 1, wherein the bar graph display device comprises a number on a liquid crystal display.

5. The above-mentioned liquid crystal bar graph display pattern has the required number of electrodes as a unit, and the wiring is arranged alternately for each unit so that the space between them is tightly spaced. 2. The bar according to claim 1, comprising an upper electrode group connected to the lower electrode group and a lower electrode group electrically independent for each upper electrode group. Graph display device.

6. A display unit and a display operation unit are provided on the surface of the box-like tester body, and a number of rod-shaped segments made of liquid crystal are arranged side by side closely in the display unit. The bar graph display pattern in the display panel formed in the above manner, and the scale scale printed on the display plate along the bar graph display pattern. And a liquid crystal display unit that has the numbers on the liquid crystal display and the unit symbols of the liquid crystal display set in the margins of the display panel, and the display operation unit for changing the range of the liquid crystal display Rotary switch, data hold switch to keep the measured quantity displayed in a bar graph, and a mat to display the maximum value of the measured quantity A cross-hold switch and a switch for magnifying and displaying the measured amount are provided. Bar graph display range according paragraph 1 of have found the claimed use to de di data Le formula Te is te that.