JPS6111795A - Display - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Technical field of invention] The present invention relates to a display device that displays a bar graph.

The present invention relates to a display device that is installed in, for example, an automobile's instrument panel and displays the number of revolutions per unit time of an engine that is a rotating body.

[Prior art]

For example, as a display device that is installed in the instrument panel of a car and displays the number of rotations per unit time of the engine, which is the rotating body of the engine, conventionally disclosed in Japanese Utility Model Application Publication No. 58-133178 or Japanese Patent Application Publication No. 58-162869. The one described in the No. Publication is known.

Figure 1 is a diagram showing the main part of what is described in the above-mentioned Japanese Patent Application Laid-Open No. 58-162869, and in Figure 3 (1)
(1a) is a first display section consisting of liquid crystal arranged in a bar shape, and (2) is a display board with numbers from θ to 7 printed in correspondence with the first display section + 11. This is the numerical part.

And in something configured like this.

The first display section (1
) segment (1a) lights up to display the above-mentioned rotational speed in the form of a bar. For example, if the above rotation speed is 1500
rpm, the leftmost segment shown in Figure 1) (1a) to the number 11 in the number part (2)
” and “2”, the segments up to (1a) are turned on by being energized, and the remaining segments (1a) are not energized and remain off.Segments like this ( The speed can be read as 1500 rpm based on the lighting condition of 1a) and the numbers printed on the display board.

However, 9. For something configured like this.

Since the first display section +11 is composed of liquid crystal and the number section (2) is composed of printing, the contrast ratio between the two is large, and only the first display section (1) that is displayed on liquid crystal is emphasized. This has the problem that it is difficult to read the number of revolutions per rotation.

[Summary of the invention]

This invention has been made in view of the above points, and includes a first display section that displays a bar-like display by arranging a plurality of segments and turning on and off the segments by a control device, and a plurality of numbers. The segments are arranged at predetermined intervals, and the control device lights up the numerical segments.
The present invention proposes a display device that is equipped with a second display section that displays numbers when the light is turned off, and that improves the familiarity of the 9 display.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 2 and 3. (3) is a T that is arranged corresponding to the first display section (1) and represents the numbers 0 to 7. one digit segment)
(3a) is a second display section consisting of liquid crystals arranged at predetermined intervals; (4) is a pulse signal generating means that outputs a pulse signal according to the rotation speed of the engine, which is a rotating body, and is composed of an ignition coil, etc. This is what is being done. (5
) is a counter that counts the pulse signals from this pulse signal generating means.

(6) is a microcomputer, which includes a calculation unit (6a) that calculates the number of revolutions per unit time by receiving the number of pulses counted by the counter (5) during the timer time, and a unit from this calculation unit (6a). Divide the number of revolutions per hour by the weight of the number of revolutions assigned to one segment (1a) (Should the number of revolutions be displayed in one segment (1a)?) , a first control section (6b) that outputs a Makoto 1 display signal according to the value, and the arithmetic section (6a).
The number of revolutions per unit time from The second control section (6C) outputs a second display signal according to the value obtained by dividing the signal by 1000 rpm (representing the highest digit) and rounding down the decimal places. (7) is a first driver that receives a first display signal from the first control unit (6b) and lights up the segment (1a) in the first display unit (1); In response to the second display signal from the second control unit (6C), the numeric segment (6a
) is the second driver that lights up.

The arithmetic unit (6a) and the first control unit (sb)
.

and the first driver (7) constitute a first control means, the arithmetic unit (6a), the second control unit (6c),
The second driver (8) constitutes a second control means, and the first and second control means and the counter (5) constitute a control device. be.

Next, the operation of the display device configured in this manner will be explained.

First, to explain the display on the first display section (11),
A counter (5) counts the number of pulses of the primary side signal of the ignition coil in the pulse signal generating means (4) for a timer period based on a signal from the microcomputer (6). In response to the number of pulses counted by the counter (5), a calculation section (6a) calculates the rotational speed of the engine based on this number of pulses and the timer time. In response to this rotational speed, the first control section (6b) divides the rotational speed by the weight of the rotational speed of the first display section + 11 segments (1a) and outputs a first display signal l- 9. The first driver (7) receives this first display signal and drives the first display section (1). For example, if the rotation speed is 1500 rpm, the leftmost segment) (1a
) to segment:y ) (1a) located in the center of the 1, 1 and 121 numeric segments in the second display section (3) are to be lit.

On the other hand, the display on the second display section (3) is as shown in the flowchart for displaying in FIG.
) reads the timer time and the number of pulses counted by the counter (5), and calculates the number of revolutions from both of them, as shown in steps I, ff, and V.

So far, the first part. The display is the same as that on the display section (1).

Then, in response to the rotation speed calculated by the calculation unit (6a) as shown in steps ■ and ■, the second control unit (6c) displays the numerical segment of the second display unit (3) (3a) In this embodiment, in order to express the maximum rotation speed, the weight of the rotation speed is divided by 1000 rpm, the decimal parts are rounded down, and a second display signal corresponding to the integer value is output.

In response to this second display signal, the second driver (8) drives the second display section (3) as shown in step (■) to light up the number segment (3a) corresponding to the value of the above integer. . For example, if the rotation speed is 1500 rpm,
As shown in FIG. 2, the numerical segment 10" (3a) and the numerical segment 1" (3a) are illuminated, and the other numerical segments) (3a) remain unlit.

In this way, in this display device, the first display section (1) displays the number of revolutions in a bar shape, and the second display section (3) displays the maximum number of revolutions of nine revolutions.

In addition, since both the first and second display sections (1) and (3) are displayed by lighting with liquid crystal, there is no difference in contrast between the two, and the 1 display is very easy to read.

Incidentally, in the above embodiment, a display device that displays the number of revolutions of one rotating body as a bar graph has been described.

It may also be used in electronic meters that display bar graphs, such as fuel gauges, water temperature gauges, and voltmeters.

〔Effect of the invention〕

As described above, the present invention includes a first display section that displays a bar-shaped display by arranging a plurality of segments and turning them on and off;
Since a plurality of number segments are arranged at predetermined intervals and a second display section is provided which displays numbers by lighting and extinguishing the number segments, it has the effect that one display content can be displayed very easily. get married in

[Brief explanation of the drawing]

Fig. 1 shows the main parts of a conventional display device, Figs. 2 and 3 show an embodiment of the present invention, Fig. 2 shows the main parts, and Fig. 3 shows a control device. Schematic configuration diagram, Figure 4 is the second
FIG. 3 is a flowchart for explaining the display on the display section of the figure. FIG. . In the figure, 11) is the first display section, (1a) is the segment) + (31 is the second display section, (3a) is the numeric segment, (5) is the counter, (6a) is the calculation section, (6b) ) is the first control section, (6c) is the second control section. In each figure, the same reference numerals indicate the same or corresponding parts. Agent Masuo Oiwa (2 people in a row) 1st Figure 2 Figure 4

Claims (4)

[Claims] (1) A first display section in which a plurality of segments are arranged, and the segments are turned on and off by a control device to display a bar-shaped display; A display device comprising a second display section in which segments are arranged at predetermined intervals and the number segments are turned on and off by the control device to display numbers. (2) The display device according to claim 1, wherein the first display section and the second display section are liquid crystals. (3) The control device includes a counter that counts pulse signals according to the number of rotations of the rotating body, a calculation unit that calculates the number of rotations per unit time based on the number of pulses counted by the counter, and a calculation unit that calculates the number of rotations per unit time. a first display unit that lights up a segment in the first display unit based on the number of revolutions per unit time of the first display unit;
a first control means having a control section; the calculation section and the number of rotations per unit time from the calculation section divided by the weight of the number of rotations of the numerical segment in the second display section; and a second control means having a second control section that lights up a number segment in the second display section in accordance with the above-mentioned second display section. The display device according to item 2. (4) Set the weight of the rotation speed of the number segment to 1000 rpm
4. The display device according to claim 3, wherein the second display section displays the highest digit of the rotational speed.