JP2509762Y2 - Bar graph display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Field of Use> The present invention relates to a bar graph of a system in which light emitting elements are arranged in a line and sequentially emit light when a value of a varying physical quantity is shown by a bar graph.

<Prior Art> In the above bar graph, since a monochromatic light emitting element is used, only the distinction between bright and dark is used. Therefore, in order to show the set value other than the displayed value, for example, the upper and lower limit values, a method of sliding and fixing the arrow piece indicating this on the scale plate and a method of changing the brightness are adopted, and it is difficult to see and handling is troublesome. Met.

<Embodiment of the present invention> As shown in FIG. 1, the light emitting elements 2 are continuously mounted in a row on the scale plate 1 on the front surface. In one embodiment of the present invention, a two-color LED is used. . This is an element that emits two colors, for example, red and green, by selecting a pole through which an electric current is passed. When the two colors are made to emit light at the same time, they are mixed and appear orange. Therefore, this element is arranged as shown in FIG. In the figure, one unit of the scale is indicated by one element. As an example, graduation 10 is the lower limit, 20
When the upper limit is set, the elements at the 10 and 20 positions are always made to emit red light, and the value to be displayed is shown by the left edge of the figure. Then, when the display value rises to 10, both green and red emit light in this part and it turns orange,
Is the lower limit, and the displayed value is up to 10. The displayed value further rises, the same at 20 as well,
The iron becomes orange. And when it exceeds 20, the second
It can also be red, as shown on the right side of the figure below. At this time, by changing the luminance, it is possible to show a portion exceeding the upper limit.

In order to operate the bar graph of the present invention, the third
According to the electric circuit shown in the figure. Here, the set value is turned on by the set position and the display lighting method put in the CPU, the display data is converted into this display unit, and the light is turned on in the designated color.

<Effect> By using the two-color light emitting LED as described above, a total of three colors and changes in its brightness, and a variety of display methods that were previously unthinkable on the display are possible. Can be a choice. Therefore, it is possible to simultaneously display, on a single display, three pieces of information of an arbitrary set value, measured value, and judgment. In this example, a two-color LED is used.
However, it is also possible to use a multicolor LED to make the display color change in various ways.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing the configuration of the present invention, FIG. 2 is an explanatory diagram showing an example of a display system, and FIG. 3 is a block diagram of a display command circuit. 1: Display scale plate, 2: Two-color light emitting element

Claims (1)

(57) [Scope of utility model registration request] 1. A multicolor selection type light emitting element capable of selectively lighting and displaying a plurality of colors in a device for displaying a change in physical quantity by a bar graph in which a plurality of light emitting elements are arranged in a line, and a setting. The multicolor selection type light emitting element for displaying the position is lit and displayed in a specific color, and the multicolor selection type light emitting element for displaying the change in the physical quantity is lit and displayed in a color different from the specific color. And a drive control circuit for simultaneously lighting and displaying the specific color and a color different from the specific color when the physical quantity reaches the set value.