JPS6160436B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a display device having a light source and a display element that blocks and opens the light at each position to display a multicolor display.

Previously, for example, Publication of Utility Model Publication No. 55-7977, Publication of Utility Model Number 55
As disclosed in Publication No. 31589, etc., there are many display devices that display a desired display surface at a desired time by rotating a display body equipped with a plurality of display surfaces using changes in the magnetic poles of electromagnets. Proposed. However, in conventional rotary display devices of this type, no consideration has been given to making the display surface emit light, and due to the immaturity of the structure of the display body and its drive mechanism, the light source is not connected to the display surface of the display body. Because of the distance between the two, it was not possible to provide sufficient illuminance. Therefore, additional external lighting is required at night, and on the other hand, in this type of device, the periphery of the display surface must be covered with an opaque material to hide unnecessary color areas on the color-coded display surface. In general, the effective display area is reduced, and when a large number of pictures or characters are displayed side by side, lines and surfaces are likely to be interrupted and become unclear, but this was especially the case with the above-mentioned conventional display device with poor luminescence.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a multicolor display device that overcomes the above-mentioned conventional drawbacks, has a large display capacity, and displays clear images both day and night. Another object of the present invention is to provide a display device with a simple mechanism and low power consumption.

To explain an embodiment, 1 is a display panel of a display device according to the present invention. The display panel 1 is composed of a large number of display elements 2 arranged in a matrix. Each display element 2 is formed on the display panel 1 by a central screen 3 and its frame 4 forming a panel surface. FIG. 2 shows one display element 2. FIG. Also, the third
The figure shows the XX cross section (horizontal cross section) of FIG. 2, and FIG. 4 shows the YY cross section (vertical cross section) of FIG. 2. Reference numeral 5 denotes a frame of the display element 2, the front part of the frame 5 is the frame part 4, and the part corresponding to the central screen 3 is an opening. The frame 5 of each display element 2 is provided with a through hole 7 through which the cylindrical light source 6 passes. This through hole 7 is formed when the display elements 2 are assembled to form the display panel 1.
The through holes 7 of each display element 2 are configured to communicate in parallel with the panel surface. The cylindrical light source 6 is provided to penetrate through the communicating through hole 7. 8 is a cylindrical filter, and the cylindrical light source 6 is disposed so as to pass through the inner hole thereof. The main body or outer circumferential surface 8a of this cylindrical filter 8 is divided into four equal parts in the circumferential direction and is color-coded into four colors. Further, a 1/4 section in the circumferential direction of the outer circumferential surface 8a faces the panel surface as the central screen 3 of the display element 2. Light from the internal cylindrical light source 6 passes through the cylindrical filter 8 and is emitted as the four colors (black is absorbed and not emitted). Of this diffused light, the light from the central screen 3 is captured by the viewer's vision as display light. A pair of permanent magnets 9, 9 are fixed to both sides of the cylindrical filter 8, and are formed in an annular shape so as to bypass the cylindrical light source 6. and both permanent magnets 9,9
are each magnetized in the diametrical direction, and are arranged so that the north pole N and the south pole S are in opposite positions on both permanent magnets 9,9. Reference numeral 10 denotes a roller pivotally fixed inside the frame 5, which rotatably supports the pair of permanent magnets 9 at several locations on both sides of the frame 5. This makes the cylindrical filter 8 rotatable. 1
Reference numerals 1 and 12 indicate electromagnets provided above and below the rear of the frame 5, and 11a, 11b, 12a, and 12b indicate magnetic pole pieces formed on both sides of the electromagnets 11 and 12, respectively. Each magnetic pole piece 11a, 11b, 12a, 12
The tip portion of b is provided close to the outer periphery of the permanent magnet 9. Moreover, the magnetic pole piece 11a and the magnetic pole piece 11b are arranged horizontally as a pair of magnetic pole pieces of the electromagnet 11, and the magnetic pole piece 12a and the magnetic pole piece 12b
are arranged horizontally as a pair of magnetic pole pieces of the electromagnet 12. On the other hand, the magnetic pole piece 11a and the magnetic pole piece 12
a are arranged approximately 90 degrees apart in the circumferential direction of the permanent magnet 9. The same applies to the magnetic pole piece 11b and the magnetic pole piece 12b. Excitation for each of these electromagnets 11 and 12,
De-energized, magnetic pole pieces 11a, 11b, 12a, 12b
The permanent magnet 9 is rotated by each combination of the N-pole and S-pole conversions that appear on the screen 3 so that a desired color plane appears on the screen 3 at a desired time. This operation is performed based on a control mechanism (not shown).

Next, the display operation by this device will be explained with reference to FIGS. 5 to 8. The cylindrical filter 8 is omitted in the drawing. Now, in Figure 5, electromagnet 1
A pulse current is supplied to the magnetic pole piece 11a, and the S pole S is applied to the magnetic pole piece 11a.
(In this case, an N pole is generated in the magnetic pole piece 11b, which is not shown in the drawing.), the permanent magnet 9 (in the drawing, the magnetic pole piece 11a, 1
The permanent magnet on the side corresponding to 2a is shown. ) The permanent magnet 9 rotates due to the attraction and repulsion between the magnetic pole piece 11a and the N pole of the permanent magnet 9 is attracted to the S pole of the magnetic pole piece 11a and remains stationary (in this case, the N pole of the magnetic pole piece 12a has a corresponding current 1). The S poles of the two permanent magnets 9 are attracted.) In this stationary state, one of the divided color planes of the cylindrical filter 8 is displayed on the central screen 3.
This will face the front of the display panel 1. This pulsed current is cut off in a short time, but thereafter it is maintained at its rest position by the residual magnetism of the pole pieces 11a, 11b and the magnetization of the permanent magnet 9. Next, when a pulse current is supplied to the electromagnet 12 so that an S pole is generated at the magnetic pole piece 12a, the corresponding permanent magnet 9 rotates, and the N pole located at the magnetic pole piece 11a is attracted to the magnetic pole piece 12a. (Figure 6). That is, the permanent magnet 9, and therefore the cylindrical filter 8, are rotated 90 degrees and come to rest, so that the different section screens of the cylindrical filter 8 are newly exposed to the front of the display panel 1 as the central screen 3.

Next, as shown in FIG.
When a pulse current is passed in the opposite direction to that shown in the figure to generate an N pole in the magnetic pole piece 11a, the permanent magnet 9 further rotates 90 degrees from the state shown in FIG. 6 and comes to rest. Similarly, in the case of FIG. 8, by generating an N pole in the magnetic pole piece 12a, the S of the corresponding permanent magnet 9 is
The pole comes around to the pole piece 12a. As described above, the permanent magnet 9 can take four positions in its rotational direction. Of course, the permanent magnet 9 can be freely moved in either the right direction or the left direction. Further, it is also possible to freely change the amount of rotation of the permanent magnet 9 to 180 degrees (it is only necessary to change the magnetic pole using the same magnetic pole piece). On the other hand, as described above, the cylindrical filter 8 to which the permanent magnet 9 is fixed is
The outer circumferential surface 8a is divided into 90-degree color-coded sections, and each colored section becomes the central screen 3 in each holding state. At this time, the opening surrounded by the frame portion 4 is made slightly narrower than each color-coded section of the cylindrical filter 8 so that only one color can be observed from the outside as the central screen 3. Further, the frame portion 4 is formed with a suitable opening angle, and its inner surface is made to have a good reflectance. Thereby, the transmitted light from the cylindrical filter 8 and the reflected light from the frame portion 4 can be effectively projected as a light beam with an appropriate spread. If white light is used for the cylindrical light source 6 and the cylindrical filters 8 are color-coded into white, green, blue, and red, each of these display elements 2 can be controlled and activated at the same time by a control mechanism (not shown) to display white, white, A multicolor display of green, blue, and red can be expressed on the display panel 1.

What can be said in the above embodiment is that since the light source 6 is located immediately after the cylindrical filter 8 that constitutes the central screen 3 of the display element 2, the brightness is very bright.
Visibility is very good regardless of daylight. Cylindrical light source 6
Since the light passes through the cylindrical filter 8 and is internally illuminated, the light emitted from the cylindrical filter 8 spreads over a wide angle and is reflected on the inner surface of the frame portion 4. As a result, the display surface becomes wider and the display panel 1 There is almost no upper dead space. Also, since the cylindrical light source 6 is used by penetrating it, compared to using individual light sources,
Mechanically, it is very advantageous in terms of cost.

In the embodiment shown in FIG.
3 was formed. This example will be explained with reference to FIG. 9. In FIG. 9, when the magnetic pole piece 11a holding the N pole of the permanent magnet 9 is changed to the N pole, the magnetic pole piece 11a and the permanent magnet 9 becomes a repulsive state. However, if the center position of the force acting as the S pole of the magnetic pole piece 11a in the holding state is the same as the center position of the force acting as the N pole in the repulsion state, no component force in the rotational direction is generated in the permanent magnet 9. , the inconvenience of not rotating may occur.
Therefore, as shown in FIG.
Appropriate notches 13 are formed in b, 12a, 12b. As a result, in the holding state, the notch 13
The concave portion becomes farther away from the permanent magnet 9, and the center of the acting force of the magnetic pole piece 11a attracted to the permanent magnet 9 is shifted somewhat toward the direction without the notch 13 compared to when the notch 13 is not present. Assume that the center of the acting force in this case is at the position indicated by angle α in FIG. Next, when the electromagnet 11 is excited and the magnetic pole piece 11a is magnetized to the north pole, the magnetic flux density of the minimum width portion 14 due to the notch 13 exceeds the saturation magnetic flux density of the material, and the notch 13
Leakage magnetic flux is generated in the part. As a result, the magnetic pole piece 11
The center of the acting force of the magnetic force a is at a position shifted from the angle α toward the notch 13 by an angle β. Therefore, when the relationship between the permanent magnet 9 and the magnetic pole piece 11a changes from a holding state to a repulsive state, a component of the repulsive force is generated in the rotational direction, and the permanent magnet 9 is reliably rotated. This means that the cylindrical filter 8 rotates smoothly in response to the operation.

In the above embodiment, a case of four-color display is shown, but it is also possible to use one electromagnet and divide the cylindrical filter into two colors in the circumferential direction to display two colors. It is also possible to use a plurality of three or more electromagnets and color-code the outer circumferential surface of the cylindrical filter into equal parts equal to twice the number of electromagnets in the circumferential direction, thereby displaying six or more colors.

Further, although a cylindrical filter was used in the above embodiment, a polygonal cylinder such as a square or hexagonal cylinder may be used.
Further, in the above embodiment, the rollers 10 are arranged three times at intervals of approximately 120 degrees.
I decided to arrange them individually, but this is a cylindrical filter 8
Bearings or other means are possible as long as they can be held rotatably.

Alternatively, as shown in FIG. 11, the permanent magnet 9 may be supported in the thrust direction and the cylindrical light source 6 may be passed through it in the vertical direction. That is, in this embodiment, in the display panel 1 shown in FIG. 1, the cylindrical light sources 6 are arranged vertically on the back surface side.

Further, in the above embodiment, the magnetic pole pieces 11a, 11b, 12a, 12b of the electromagnets 11, 12 are replaced by the permanent magnet 9.
Although the permanent magnets 9 are arranged close to each other in the circumferential direction, as shown in FIG. 12, the end face side of the permanent magnet 9 may be used to operate the magnetic force.

Alternatively, as shown in FIG. 13, one electromagnet 11 may be used, and its magnetic pole pieces 11a and 11b may be opposed to each other by 180 degrees with respect to the rotational direction of the permanent magnet 9. In this case, the cylindrical filter 8 is divided into two colors for two-color display.

Further, in the above description, a separate permanent magnet 9 is attached to the cylindrical filter 8, but by making a part of the cylindrical filter 8 possess magnetism, or by using a magnetic material in the cylindrical filter 8, the above-mentioned effect can be achieved. The permanent magnet 9 can also be omitted.

As described above, according to the present invention, the cylindrical filter color-coded in the circumferential direction is rotatably controlled by an electromagnet, and the cylindrical light source penetrates the inside of the cylindrical filter. The brightness is bright and visibility is very good both day and night. In addition, since it is internally illuminated, the light emitted from the filter spreads over a wide angle and is reflected on the inner surface of the frame, making the display surface wider. It is very clear in comparison. In addition, it can display multiple colors. Since the filter is made into a cylinder and the cylindrical light source passes through the filter, the structure is very simple compared to a filter that requires a separate light source.
Moreover, since the cylindrical light source can be shared, energy is saved. Furthermore, when a display device is constructed by arranging display elements, the mechanical relationship between the arranged display elements and the cylindrical light source that passes through them is very simple, and assembly is easy. Further, if a notch is provided in the magnetic pole piece of the electromagnet, the rotational movement of the cylindrical filter becomes smooth, and the display can be performed reliably and smoothly. Moreover, no special mechanism is required just by providing a notch.

[Brief explanation of the drawing]

FIG. 1 is a front view of a display device showing an embodiment of the present invention, FIG. 2 is a front view of a display element constituting the display device, FIG. 3 is a sectional view taken along line XX in FIG. 2, and FIG. FIG. 2 is a YY cross-sectional view, FIGS. 5 to 8 are simplified diagrams showing the display operation of the display element, FIGS. 9 and 10 are simplified diagrams showing other examples of the display element, and FIGS. 11
13 are simplified diagrams showing examples of other display elements. DESCRIPTION OF SYMBOLS 1... Display panel, 2... Display element, 3... Center screen, 4... Frame part, 5... Frame, 6... Cylindrical light source,
8... Cylindrical filter, 9... Permanent magnet, 11, 12
...Electromagnet, 11a, 11b, 12a, 12b...Magnetic pole piece, 13...Notch.

Claims (1)

[Scope of Claims] 1. A cylindrical light source is formed into a cylindrical shape so that the cylindrical light source passes through the inner hole thereof, and is rotatably supported by a frame,
It also has a cylindrical filter divided in the circumferential direction and color-coded, a permanent magnet attached to the cylindrical filter, and a magnetic pole piece disposed close to the permanent magnet. A multicolor display device comprising a display element comprising an electromagnet that rotates the cylindrical filter by changing its magnetic pole. 2. The multicolor display device according to claim 1, wherein a large number of display elements are arranged vertically and horizontally, and the cylindrical light source is arranged vertically or horizontally through a cylindrical filter of each display element. . 3. The multicolor display device according to claim 1 or 2, wherein a notch is formed on the surface of the magnetic pole piece facing the permanent magnet.