JPS5836005Y2 - Bar graph display device - Google Patents

Description

[Detailed description of the invention] The present invention has a display unit that has a plurality of display elements arranged in columns and displays the magnitude of an input signal as a bar graph by selectively driving these display elements, and a scale. Provided is a bar graph display device comprising a scale plate whose surface is located at a different height from the display surface of a display element of a display section, and which does not cause reading errors due to parallax. It is something to do.

FIG. 1 is a configuration explanatory diagram showing an example of such a conventional display device, in which a is a partially cutaway perspective view showing the main parts thereof, and b is a sectional view, showing an example using a fluorescent display tube. It shows.

In the drawings, 10 is a display section, and 20 is a scale plate.

The display unit 10 includes a substrate 11, a plate 12 arranged in a line on the substrate 11 and coated with a phosphor, a grid 13 disposed on the plate 12, a filament 14 disposed on the grid 13, these plates 12, It is composed of a glass tube 15 and the like formed to enclose a grid 13 and a filament 14.

On the other hand, the scale plate 20 is formed into a flat plate shape, and is formed of, for example, a transparent plastic plate so that the plate 12, which is the light emitting display element of the display section 10, can be seen through. A scale number 22 is written.

The scale plate formed in this way is arranged so as to overlap the surface of the display section 10.

By the way, the display device configured in this manner includes the display surface A of the light emitting display element 12 of the display section 10 and the scale plate 20.
Since the scale surface B is located at a different height, as shown in FIG. 2, if the reading positions are different, a reading error will occur due to parallax.

The present invention is designed to prevent reading errors caused by such parallax, and will be described in detail below with reference to the drawings.

FIG. 3 is an explanatory diagram showing the main parts of an embodiment of the present invention, and the same parts as in FIG. 1 are given the same reference numerals.

In FIG. 3, reference numeral 16 indicates a scale arranged on the same plane 11 as the bar graph display display element 12 of the display section 10 so as to correspond to the display element 12 and the scale line 21 of the scale plate 20. This is a display element for line display.

All of these display elements 16 for displaying the scale lines are always driven and lit, regardless of the magnitude of the input signal, or predetermined display elements are selectively driven and lit according to the magnitude of the input signal.

With this configuration, the display element 16 for displaying the scale lines of the display unit 10 is driven to display the reference point corresponding to the scale line 21 of the scale plate 20, so that reading using parallax as in the conventional method is not possible. No errors occur.

In the above embodiments, a fluorescent display tube is used as the display section, but similar effects can be obtained using a light emitting diode, a liquid crystal display element, a plasma display element, or the like.

Further, in the above embodiment, the bar graph display display element 20
Although the example in which one display element for displaying scale lines is provided for each scale board is shown, the present invention is not limited to this. Predetermined display elements may be selectively driven in accordance with the change.

As explained above, according to the present invention, a bar graph display device that does not cause reading errors due to parallax can be realized, and the practical effects are great.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the configuration of an example of a conventional display device of this type, FIG. 2 is an explanatory diagram of the occurrence of reading errors in FIG. 1, and FIG. 3 is a configuration diagram showing the main parts of an embodiment of the present invention. It is an explanatory diagram. 10...Display section, 11...Substrate, 12
...Plate (display element for bar graph display),
13...Grid, 14...Filament, 15...Glass tube, 16...Display element for displaying graduation lines, 20...Scale board, 2
1... Scale line, 22... Scale number.

Claims (1)

[Scope of utility model registration request] What is a display unit that has a plurality of display elements arranged in a row and displays the magnitude of an input signal as a bar graph by selectively driving these display elements, and a display surface of the display element whose scale surface is the display unit? In a bar graph display device comprising scale plates arranged at different heights, the bar graph display elements and the scale marks on the scale plate are arranged on the same plane as the bar graph display elements of the display section. A bar graph display device equipped with a display element for displaying scale lines corresponding to the lines.