JPH07334113A - Bar graph display device - Google Patents

Abstract

PURPOSE:To provide a bar graph display device displaying more data capable of identifying them. CONSTITUTION:In a bar graph display device provided with a bar graph 10 arranging light emitting elements in a line capable of selectively emitting light, a driving means supplying a driving signal to the light emitting element and a selecting means selecting a light emitting element connected to the driving means from among the light emitting elements according to data to be displayed, the driving means is provided with a continuous light emitting means 4 for making the light emitting element continuously emit light and a blinking means 7 for blinking the light emitting element and the selecting means is provided with a continuous light emission selecting means 2, 51, 52 for selecting a light emitting element connected to the continuous light emitting means 4 according to the data of one group from among the supplied plural data and blink selecting means 31, 32, 61, 62 for selecting a light emitting element connected to the blinking means 7 according to the data of the other group.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bar graph display device in which light-emitting elements capable of selectively emitting light are arranged in a row, and light-emitting elements that emit light are selected to display a value of a varying physical quantity. The present invention relates to a bar graph display device capable of efficiently displaying the above data.

[0002]

2. Description of the Related Art A bar graph display device is used to display a physical quantity (data) in an easy-to-understand manner. In the bar graph display device, light emitting elements such as LEDs are arranged in one row, and light is emitted in a rod shape so that the length is different depending on the data value to display the data. FIG. 8 is a diagram showing a conventional example of a display unit in a bar graph display device. 8 (1) displays the data by the length of the bar extending from one end,
Here, it is referred to as a one-sided bar graph. 8 (2) shows the absolute value by the length of the bar, which is extended to one side when the data is positive and extends to the other side when the data is negative, with an appropriate point on the bar graph as the base point. Then, it will be referred to as a double bar graph. The base point is normally set at the center of the bar graph, but it may be set anywhere depending on the data to be displayed.

In the conventional bar graph display device, only one data item is displayed. Therefore, when displaying a plurality of data, for example, the data to be displayed is switched by a switch or the like, or a plurality of bar graph display devices are arranged in parallel. However, if the data to be displayed is switched with a switch or the like, a plurality of data cannot be displayed at the same time. Therefore, if the data is changing, it is impossible to sufficiently display the change, and the switching operation is complicated. There was a problem that was. In addition, when a plurality of bar graph display devices are arranged in parallel, there is a problem that the device becomes large and the cost also increases. Further, since a plurality of displays are separated from each other to some extent, it may be difficult to see.

Therefore, the applicant of the present invention filed Japanese Utility Model Application No. 61-1309.
In No. 76, by using a multicolor selection type light emitting element in the display unit of the bar graph display device, the physical quantity and the setting level that can be arbitrarily set are displayed in different colors, and when the physical quantity reaches the setting level, the color is changed, A bar graph display device that facilitates adjustment and the like is disclosed. FIG. 9 is a diagram showing a configuration example of a multicolor selection type light emitting element.

In FIG. 9, reference numeral 12 indicates a multicolor selection type light emitting device, which is provided with a red light emitting diode 13 for outputting a red color and a green light emitting diode 14 for outputting a green color. Reference numeral 45 is a driving power source for driving the red light emitting diode 13, and 46 is a resistor for limiting current.
Reference numeral 53 is a switch for controlling the connection between the red light emitting diode 13 and the driving power supply 45. When the switch is in the connected state, the red light emitting diode 13 emits red light. Similarly,
Reference numeral 47 is a drive power supply for driving the green light emitting diode 14, 48 is a resistor for limiting current, and 54 is a switch for controlling connection between the green light emitting diode 14 and the drive power supply 47.

[0006]

However, even in the bar graph display device using the above-mentioned multicolor selection type light emitting element, what is displayed is fluctuating data and two set values set from the outside. It is desired to be able to display the data. Further, the multicolor selection type light emitting element is more expensive than a normal monochromatic light emitting element, and there is a demand for a bar graph display device capable of displaying a plurality of data without using the multicolor selection type light emitting element.

The present invention has been made to realize such a demand, and realizes a bar graph display device capable of displaying a plurality of data without using a multicolor selection type light emitting element, and multicolor selection. It is an object of the present invention to realize a bar graph display device capable of displaying a larger amount of data even when a die-type light emitting element is used.

[0008]

A bar graph display device according to a first aspect of the present invention includes a light emitting element capable of selectively emitting light.
A bar graph display device including bar graphs arranged in columns, driving means for supplying a driving signal to each light emitting element, and selecting means for selecting a light emitting element connected to the driving means from among the light emitting elements according to the data to be displayed. In order to achieve the above object, the driving means includes a continuous light emitting means for continuously emitting light from the light emitting element and a blinking means for blinking the light emitting element, and the selecting means is one group of a plurality of data to be supplied. Continuous light emission selecting means for selecting a light emitting element to be connected to the continuous light emitting means according to the data of 1), and blinking selecting means for selecting a light emitting element to be connected to the blinking means according to the data of the other group. And

The bar graph display device according to the second aspect of the present invention displays a bar graph in which light emitting elements capable of selectively emitting light are arranged in one row, and a drive means for supplying a drive signal to the light emitting elements. According to the data, a bar graph display device comprising a selection means for selecting a light emitting element connected to the driving means from among the light emitting elements, in order to achieve the above object,
The light emitting element includes two color light emitting elements that output two different colors, and the driving unit includes two color light emitting units that cause the two color light emitting elements of each light emitting element to independently emit light, and one or both of them emit light. By emitting light from the element, three colors of light can be emitted, and the data to be displayed are the measurement values, the maximum and minimum values of the measurement values within 11 measurements, and any setting of the measurement values set from outside. The measured value, the group of the maximum value and the minimum value, and the group of the set value are displayed in different colors.

A bar graph display device according to a third aspect of the present invention displays a bar graph in which light emitting elements capable of selectively emitting light are arranged in a row, and a drive means for supplying a drive signal to the light emitting elements. A bar graph display device comprising a selection means for selecting a light emitting element to be connected to a driving means from among the light emitting elements according to the data, wherein all the data to be displayed is obtained by causing one light emitting element of the bar graph to emit light. It is characterized by being displayed as dots.

[0011]

In the bar graph display device according to the first aspect of the present invention, the light emitting state of the light emitting element is divided into a constantly lit state and a blinking state so that they can be identified. Thereby, a plurality of data can be displayed without using the multicolor selection type light emitting element. Further, by changing the blinking cycle and the duty ratio, more data can be identified.
Further, by using the multi-color selection type light emitting element and dividing the light emitting state into constant lighting and blinking, more kinds of data can be displayed on one bar graph display device.

In the bar graph display device of the second aspect of the present invention, since the light emitting element is composed of two color light emitting elements which output two different colors, three colors of light can be emitted.
The number of data that can be displayed can be increased by displaying the measured value, the group of the maximum value and the minimum value, and the group of the set value in different colors. In the conventional bar graph display device, 1
Since it is displayed by a bar graph, when a plurality of data are displayed, light emitting elements that emit light according to the data are likely to overlap with each other, and it is difficult to identify the overlap. On the other hand, in the bar graph display device according to the third aspect of the present invention, since all the data to be displayed is displayed by dots by illuminating one light emitting element of the bar graph, Overlap is minimized and data identification is easier.

[0013]

[Embodiment] In the first embodiment, when the equipment is adjusted, the maximum value and the minimum value of the measured values within one measurement are displayed together with the measured values to facilitate the adjustment. An example will be described. FIG. 1 is a diagram showing a display example in the first embodiment. (1) shows a case of a one-sided bar graph, (2)
Shows a case of a double-bar bar graph, and (a) to (c) of (2) are diagrams showing display examples of combinations in which a measured value, a maximum value, and a minimum value can be taken.

As shown, the measured values are displayed in a bar graph, and the maximum and minimum values are displayed as dots. (A) of (2) of FIG.
In the case of (b) and (c), one of the maximum value and the minimum value is overlapped with the measured value, though the data is the easiest to identify because the data do not overlap. As is clear by comparing (b) and (c) in (1) and (2), the data displayed by one point overlaps with the bar graph displaying another data in each case, and the remaining The data do not overlap. Therefore, in the following description, a one-sided bar graph will be described as an example.

The measured value shown in (1) of FIG. 1 is displayed as a continuous bar bar graph, and the maximum and minimum values are displayed as blinking dots. FIG. 2 is a diagram showing a circuit configuration of the bar graph display device of the first embodiment. In FIG. 2, reference numeral 10 is a one-sided bar graph in which monochromatic light emitting elements are arranged in one row, 1 is a microcomputer, and 2 is a first.
Output port, 31 is a second output port, 32
Is a third output port, 4 is a DC power source for continuously emitting light from a bar graph light emitting element, 41 and 42 are resistors for limiting a current flowing through the light emitting element (LED), and 51 and 52 are light emitting elements. Is a switch for controlling whether or not to connect to the DC power source 4, the connection state is controlled according to the signal output from the first output port 2, and the connection state is controlled according to the signal output from the second output port 31. Is a maximum value selection switch, 62 is a minimum value selection switch whose connection state is controlled according to a signal output from the third output port 32, and 7 is a blinking drive for a light emitting element displaying the maximum value and the minimum value. Oscillator circuit for
Reference numerals 1 and 72 are current limiting resistors.

The processing for calculating the maximum value and the minimum value from the measured value and the generation of the signal for selecting the light emitting element for displaying the measured value, the maximum value and the minimum value are all performed by the microcomputer. The display of the measured value is performed by continuously emitting all the light emitting elements corresponding to the values less than or equal to the measured value of the bar graph 10, and the light emitting element having the minimum value among them is not included in the power source 4 for continuous light emission. Do not connect. Even when the measured value agrees with the maximum value, the light emitting element shall not continuously emit light but blink.

FIG. 3 shows a process of calculating the maximum value and the minimum value from the measured values and a process of generating a signal for selecting a light emitting element for displaying the measured value, the maximum value and the minimum value in the first embodiment. It is a flowchart. This process will be described below. In step 101, the measured value is read, and in step 1
In 02, the maximum value up to that point is read from the register. Immediately after the measurement is started, the value in the register is cleared, so zero is read as the maximum value. In step 103, it is determined whether or not the measured value is larger than the maximum value, and if it is larger, the maximum value is rewritten in step 104, and the process proceeds to step 105. When the measured value is not larger than the maximum value, the process also goes to step 105. In step 105, the maximum value is output to the second output port 31. As a result, only the light emitting element for which the maximum value selection switch 61 displays the maximum value is connected to the oscillation circuit 7. Maximum value selection switch 6
Reference numeral 1 is a circuit in which a decoder and a switch array are combined, which is usually called a selector, and is well known, so its explanation is omitted here. Similarly, step 106
From 109 to 109, the minimum value is calculated and displayed.

In step 110, all consecutive display bits are cleared. The continuous display bit corresponds to each light emitting element of the bar graph 10 on a one-to-one basis, and is set to "1" when the light emitting element continuously emits light, and "0" when not emitting light. The continuous display bit is output from the first output port 2,
Each bit signal controls the connection state of the switches 51, 52, .... That is, when the continuous display bit is “1”, the switch is connected and the corresponding light emitting element is connected to the DC power source 4 to emit light, and when the continuous display bit is “0”, the switch is not connected. A current does not flow in the light emitting element that does not emit light.

In steps 111 and 112, it is determined whether the measured value is equal to the maximum value or the minimum value. If they are not equal, the light emitting element continuously emits light.
At 13, the bit is set to "1". If they are equal, the light emitting element is blinked, so that the bit is set to "0" so as not to be connected to the DC power source 4. Step 114
Then, 1 is subtracted from the measured value, and it is determined in step 115 whether the measured value is the value of the base point of the bar graph. If it is not the value of the base point, the process returns to step 111 and the above processing is repeated. As a result, all the light emitting elements between the light emitting element corresponding to the measured value of the bar graph and the base point, which do not match the maximum value or the minimum value, continuously emit light.

In the first embodiment, the oscillating circuit 7 is used to blink the light emitting element. However, the light emitting element corresponding to the maximum value and the minimum value is intermittently connected to the DC power source 4 without using the oscillation circuit 7. Signal from the microcomputer 1 to the first
You may make it output to the output port 2. In order to perform such an operation, steps 111 to 1 in FIG.
The bits corresponding to the maximum value and the minimum value of the continuous display bits obtained in 15 are output to the first output port 2 while being alternately changed between "0" and "1". Since such a method is widely used, it is omitted here. At present, the processing capability of microcomputers is improving,
Processing with software as much as possible can reduce the cost, and complicated display can be performed easily.

FIG. 4 is a diagram showing the circuit configuration of the second embodiment. In FIG. 4, reference numeral 11 is a bar graph in which light-emitting elements having two light-emitting elements that output two different colors are arranged, and three or more light-emitting elements can emit light of three colors. Is. Two terminals are output from each light emitting element and are connected to two light emitting elements, respectively.

As shown in the figure, in the circuit of the second embodiment, the first output port 2 for continuous light emission for displaying the bar graph in the circuit of the first embodiment shown in FIG. In addition to the columns 51 and 52, a fourth output port 3 having a similar configuration, a DC power source 73, and switch columns 63 and 64
Are provided, and each part controls two terminals of each light emitting element. That is, the red light emitting element of the light emitting element is controlled by the first portion, and the green light emitting element is controlled by the second portion. It is assumed that each part can also control blinking and the like by the processing by the above software.

In the second embodiment, the measured value is displayed in a green bar graph, the maximum value and the minimum value are displayed in red dots, and the upper and lower limits of the adjustment target range are emitted by two types of light emitting elements. It is displayed in orange color obtained by Figure 5
Is a display example thereof, (1) shows the case of a one-bar bar graph, and (2) shows the case of a two-bar bar graph. Since they are displayed in different colors, they can be clearly identified.

Further, if the maximum value and the minimum value, or the upper limit and the lower limit are blinked by the processing by the software, the display can be made easier to identify. Further, even when the number of data to be displayed increases, the number of data that can be displayed in a distinguishable manner increases by blinking some of the display colors.
If the blinking cycle is changed, the number of data that can be displayed in a distinguishable manner is further increased. Further, if the duty ratio at the time of continuous light emission and blinking is changed, the amount of light emission changes and the brightness of the display also changes, which also increases the number of data that can be displayed in the identification process.

In the first and second embodiments, the measured value, the maximum value and the minimum value of this measured value within one measurement, and the upper limit and the lower limit of the adjustment target range are displayed. For example, it may be necessary to display two. Two data can be displayed with one continuous light emission and the other blinking, or one with the first color method and one with the second color,
The overlapping portions can be displayed in one color or in a combined color, but it may be difficult to see if two bar graphs are displayed. The third embodiment is an example of displaying two measured values.

FIG. 6 is a diagram showing a display example of the third embodiment. As shown, both measurements are displayed as dots. In this case, a single color bar graph can be displayed.
Further, if one of them is made to blink, the identification is easier. Of course, it may be displayed in another color. FIG. 7 is a diagram showing a display example of the fourth embodiment. Two measurements are also displayed in this example, but as shown, one is a bar graph and the other is a dot. The dot display is blinking. Of course, it may be displayed in another color.

Although the embodiments of the present invention have been described above, as is apparent from the above description, the methods for distinguishably displaying a plurality of data can be combined, and more data can be obtained by combining them. It can be displayed so that it can be identified.

[0028]

As described above, according to the present invention,
It is possible to increase the number of pieces of data that can be displayed in a distinguishable manner on the bar graph display device, and at the same time, increase in cost can be minimized.

[Brief description of drawings]

FIG. 1 is a diagram showing a display example in a first embodiment of the present invention.

FIG. 2 is a block diagram showing a circuit configuration of a first embodiment of the present invention.

FIG. 3 is a flowchart showing a processing procedure in the first embodiment of the present invention.

FIG. 4 is a block diagram showing a circuit configuration of a second embodiment of the present invention.

FIG. 5 is a diagram showing a display example in the second embodiment of the present invention.

FIG. 6 is a diagram showing a display example in the third embodiment of the present invention.

FIG. 7 is a diagram showing a display example in the fourth embodiment of the present invention.

FIG. 8 is a diagram showing a conventional display example in a bar graph display device.

FIG. 9 is an explanatory diagram of a configuration and driving method of a multicolor selection type light emitting device.

[Explanation of symbols]

 1 ... Microcomputer 2 ... 1st output port 3 ... 2nd output port 4 ... DC power supply 51, 52 ... Switch 61 ... Maximum value switch 62 ... Minimum value switch 7 ... Oscillation circuit 73 ... DC power supply 10, 11 ... Bar graph

Claims (8)

[Claims] 1. A bar graph in which light emitting elements capable of selectively emitting light are arranged in a row, a driving means for supplying a driving signal to the light emitting elements, and the driving means among the light emitting elements according to data to be displayed. In the bar graph display device including a selection unit that selects a light-emitting element connected to, the driving unit includes a continuous light-emitting unit that continuously emits the light-emitting element, and a blinking unit that blinks the light-emitting element, wherein the selection The means is connected to the continuous light emission selecting means for selecting the light emitting element to be connected to the continuous light emitting means according to the data of one group of the plurality of supplied data, and to the blinking means according to the data of the other group. A bar graph display device comprising: a blinking selection means for selecting a light emitting element to be displayed, and a plurality of data can be simultaneously displayed. 2. The bar graph display device according to claim 1, wherein the blinking means is capable of changing at least one of a blinking cycle and a ratio of a lighting period and a non-lighting period when blinking. 3. The light emitting element includes two light emitting elements that output two different colors, and one or both of the light emitting elements can emit light to emit light of three colors, and the light emitting element continuously emits light. Is displayed in at least two different colors. 3. The bar graph display device according to claim 1, wherein. 4. The light-emitting element includes two light-emitting elements that output two different colors, and one or both of the light-emitting elements can emit light to emit light of three colors. The bar graph display device according to claim 1 or 2, wherein the bar graph display device is displayed in at least two different colors. 5. The bar graph display device according to claim 1, wherein the bar graph is a one-sided bar graph whose length from one end changes according to a data value. . 6. The bar graph is a bar graph of both bars extending in one direction when the data value is positive and extending in the opposite direction when the data value is negative. The bar graph display device according to any one of the above. 7. One of the data to be displayed is displayed by a bar graph, and the remaining data is displayed by dots by illuminating one light emitting element of the bar graph. The bar graph display device according to any one of the above. 8. The bar graph display device according to claim 1, wherein all the data to be displayed are displayed by dots by causing one light emitting element of the bar graph to emit light.