JPS60201378A - 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 The present invention relates to a display device that uses magnetic fluid in a display device that displays predetermined items such as temperature and pressure.

Conventional display devices were mostly composed of lamps, light emitting diodes, etc., but these components had the disadvantage that they would burn out and stop lighting up after long-term use.

Therefore, it is an object of the present invention to provide a display device with a simple structure and long life. The display device is enclosed in a cylindrical container and has a magnetism generating section provided outside the cylindrical container.

Therefore, by applying an external magnetic field to aggregate the magnetic fluid in the container,
Since the display items can be identified by the aggregation position, the above-mentioned problem can be achieved without requiring any generating parts such as lamps.

Hereinafter, the present invention will be explained in detail with reference to the drawings.

FIG. 1 shows a first embodiment of the present invention, in which a container 1 is made of a non-magnetic material such as synthetic resin.

A storage section 1a is formed at the bottom, and a display section tb is formed at the top.

The display surface 2 of the display section 1b is formed of a translucent member, and the inside of the display section 1b can be seen through. On the surface of the display surface 2, display items 3, 4.5 are written by engraving or printing along the longitudinal direction. A liquid mixture of a magnetic fluid 6 and a non-magnetic fluid 7 for smoothing the movement of the magnetic fluid 6 is sealed in the container l. The magnetic fluid 6 is, for example, a colloidal liquid in which ferromagnetic particles Fs304 with a diameter of about 100λ are dispersed in mercury at a high concentration, and the magnetic particles do not settle or aggregate even when a magnetic field is applied. Apparently the liquid itself behaves magnetically.

Further, by selecting a non-magnetic fluid 7 having a specific gravity lower than that of the magnetic fluid 6, the magnetic fluid 6 is precipitated and accumulated in the storage portion la when the device is not operating.

On the side opposite to the display surface 2 of the container 1, there are electromagnets 8, 9, 10 constituting a magnetism generating section corresponding to the number of display items described above.
are arranged side by side.

In the above configuration, display items 3 written on the display surface 2,
When displaying items 3 and 4 of 4.5, the electromagnets 8 and 9 corresponding to these items are excited. The electromagnets 8, 9
Due to the generated magnetic field, the magnetic fluid 6 accumulated in the storage section 1a moves from the storage section 1a to the display section ib, and condenses at a position corresponding to the electromagnets 8 and 9 in the display section 1b. That is, the display items 3 and 4 on the display surface 2 corresponding to the aggregation position of the magnetic fluid 6 in the display section lb are the current display objects.

A second embodiment is shown in FIG. 2, and the same components as those in the previous example are given the same numbers and their explanations will be omitted.

To explain the following specific points, although the overall shape of the container 1' is different from that of the previous example, its basic structure is the same and is composed of a storage section 1a' and a display section 1b'.

The display portion lb' is long in the horizontal direction, and display items 3, 4, 5°12 are written on the display surface 2' made of a translucent member.

Therefore, when displaying items 4 and 12, if the corresponding electromagnets 9 and 11 are energized, the magnetic fluid 6 in the storage section 1a' moves to the display section 1b' and the electromagnets 9 and 11 are placed at the position. Because they are aggregated, it is possible to identify that display item 4.12 is the current display target.

As described above, according to the present invention, since the displayed content is identified by the moving position of the magnetic fluid, the structure is simple, there are no consumable parts, and it can be used semi-permanently. .

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a first embodiment of the invention, and FIG. 2 is a perspective view showing a second embodiment. ■, 1'...Container, 6...Magnetic fluid, 8,9゜1
0.11...Electromagnet. Patent applicant: Diesel Kiki Co., Ltd. Figure 1

Claims (1)

[Claims] A display device characterized in that a liquid mixture of a magnetic fluid and a non-magnetic fluid is sealed in a cylindrical container whose display surface is transparent, and a magnetism generating section is provided on the outside of the cylindrical container.