JP3202745B2 - Display element - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial applications]

The present invention relates to a display element forming a pixel of a large display device.

2. Description of the Related Art Conventionally, a large display device has been known which is used for displaying a score or a player's name in a sports stadium or for displaying time, temperature, etc. on an outer wall of a building. I have. Each pixel of this type of display device is constituted by display elements independent of each other. As the display element, for example, those disclosed in Japanese Utility Model Publication No. Sho 59-43586 and Japanese Patent Laid-Open Publication No. Sho 55-134887 are known. These display elements are provided with electromagnetic driving means having a frame that swings like a pendulum, and are configured so that the display plate slides through a complicated link mechanism that constitutes a so-called Scott Russell mechanism together with the display plate. I have.

[Problems to be solved by the invention]

In the above conventional configuration, a plurality of pivot points are provided in the link mechanism in order to provide a Scott Russell mechanism, and these pivot points are provided by electromagnetic driving means, a link mechanism,
It is necessary to provide the case where the display board and the like are installed. That is, since the case cannot be removed and used, the distance between the display plates is increased by the thickness of the case, and there is a problem that the display plates cannot be arranged at a high density. In addition, since a case must be provided for each display panel, a large number of cases are required to constitute a large-sized display device, which causes a problem of high cost. The present invention is aimed at solving the above problems,
By making the display unit that drives the display panel independent of the case, it can be used only with the display unit without using the case, thereby disposing the display panels at high density and reducing the cost of the case. In addition, when a case is used, the distance between the case and the display panel can be reduced, so that the display surface of the display panel can be easily viewed, and the power required to reverse the display panel is reduced. It is intended to provide a small display element.

[Means for Solving the Problems]

In order to achieve the above object, according to the configuration of claim 1, at least the front surface is provided with a transparent case, and a display plate which is raised and lowered between a position substantially parallel to the front surface of the case and a position intersecting the front surface of the case. A plurality of display units removably mounted in the case, each of the display units being integrally formed with a coil bobbin that can be fixed at a fixed position in the case and in which a coil is wound. A permanent magnet that has a base and has an iron core fixed at one end to the base so as to be inserted into the coil bobbin, and a magnetic force can be applied between the display plate and the other end surface of the iron core. Is fixed,
A connecting member is fixed to the iron core, and the display plate is mounted on the connecting member at a position where the display plate can be rotated by the magnetic force between the iron core and the permanent magnet, and each display unit housed in the case is provided. The coil of each display unit having the same configuration is mounted on a printed wiring board fixed to a base, which is disposed at a rear portion in the case, and connected in parallel, and electrically connected to the coil to be printed wiring board. The more protruding terminals are drawn out of the case. According to the configuration of the second aspect, two display units are housed in the case, and the two display units are arranged so that the display surfaces face each other at a position where the display plate intersects the front surface of the case. . According to the third aspect of the invention, the rear part of the case is opaque when the display plate is substantially parallel to the front surface of the case.

[Action]

According to the configuration of claim 1, the display unit is removably mounted in the case and the display unit is configured as described above, so that the display plate can be rotated only by the display unit without the case. It is. That is, when a display device is configured using a plurality of display elements, only a display unit can be used without using a case, and the arrangement density of display panels can be increased by the thickness of the case. Further, the cost can be reduced by the amount of the case. Further, at the time of assembling, the display unit can be assembled independently of the case, so that the assembling work is facilitated. Moreover, since a plurality of display units are housed in the case, the distance between the case and the display plate relative to the size of the front surface of the case is compared with the case where one display unit is housed in the case. Can be reduced, and the display surface of the display panel can be easily recognized. In addition, since the display panel of each display unit can be made smaller and the moment of inertia becomes smaller, the power required to reverse the display panel can be reduced. In addition, each display unit housed in the case has the same configuration, the coils of each display unit are connected in parallel, and the terminals electrically connected to the coils are drawn out of the case. Even though a plurality of display units are provided in the case, the terminals can be connected in the same manner as in the case of a single display unit. According to the configuration of claim 2, the two display units housed in the case are arranged so that the display surfaces face each other at a position where the display plate intersects the front surface of the case. Is less crossed with the front of the case. According to the configuration of claim 3, since the rear of the display plate in the display state is opaque in the case, the rear surface of the display plate is not visible from the outside in the display state, and the appearance is improved.

[Reference example]

FIG. 1 shows a state in which the display unit 1 is housed in a case 2, and FIG. 2 shows a state in which the case 2 is removed. As shown in FIG. 1, two display units 1 are provided in a case 2. As shown in FIGS. 1 and 2, each display unit 1 includes a rod-shaped iron core 12 erected on a base 11 made of a synthetic resin. A coil 14 is wound around the inserted coil bobbin 13. The coil 14 has two windings connected in series,
Alternatively, a tap is provided at an intermediate portion of one winding, and has three terminal wires. Each terminal wire is connected to three terminal pins 15 projecting from a surface of the base 11 opposite to the surface on which the iron core 12 is erected. Coil bobbin
In FIG. 13, a substantially U-shaped bearing 16 is integrally formed as a connecting member at an end different from the base 11. A bearing hole 16a is formed in each of the two leg pieces of the bearing 16, and the tip of the iron core 2 projects from the center of the horizontal piece of the bearing 16. Bearing hole 16a is iron core 12
Is provided at a position deviated from the center line. Bearing hole 16a
The rotary shaft 18 provided on the back surface of the display plate 17 is inserted from the inside of the leg piece, and the display plate 17 is rotatably mounted on the iron core 12. The surface of the display panel 17 is printed or painted for display, or a sheet is attached. A pair of protruding pieces 17a protrude from the back surface of the display plate 17, and a rotating shaft 18 is integrally protruded from one side face of each protruding piece 17a. A permanent magnet 19 magnetized in the thickness direction of the display panel 17 is provided between the two projecting pieces 17a. According to the above-described configuration, when one of the three terminal pins 15 is used as a common terminal and the iron core 12 is energized in a direction to attract the permanent magnet 19 with one of the remaining terminals, the display is performed. Board
17 is substantially parallel to the tip surface of the iron core 12. At this time, the rotation of the display plate 17 is restricted by the back surface of the display plate 17 abutting on the front surface of the bearing 16. Also, when the iron core 12 is energized between the common terminal and the other of the remaining terminals in a direction to repel the permanent magnet 19, the display plate 17 falls down to a position substantially perpendicular to the tip end surface of the iron core 12. . At this time, the back surface of the display plate 17 comes into contact with the upper surface of the bearing 16 so that the display plate 17
Rotation is regulated. Therefore, if the side (the left side in FIG. 1 (a)) that normalizes the distal end surface of the iron core 12 is set as the front, the surface of the display plate 17 can be seen or not seen from the front as the coil 14 is energized. . In this way, the display state and the non-display state are switched. The case 2 is formed by combining a rectangular tubular case body 21 having one bottom surface opened and the other bottom surface closed, and a transparent cover 22 covering the opening surface of the case body 21 in a closed state. . The base 11 is fitted into a recess 23 provided on the inner surface of the bottom wall of the case main body 21, and is fixed by a fixing screw 24 inserted from the outside of the case main body 21 through the bottom wall of the case main body 21. Fixed to 21. Further, a protruding base 25 having a cylindrical outer surface is formed at a portion surrounding the base 11 on the outer surface of the bottom wall of the case main body 21. The terminal pins 15 in the display unit 1 are drawn out of the case main body 21 through the distal end surface of the protruding base 25. The case body 21 is formed of an opaque material.
Is formed so as to be substantially flush with the display plate 17 or slightly closer to the iron core 12 at a position where the display plate 17 is substantially parallel to the distal end surface of the iron core 12. This allows
It is possible to make the display plate 17 visible from the front as much as possible, while keeping the back surface of the display plate 17 invisible. According to the above configuration, one display unit 1 is provided in the case 2.
In comparison with the case where the display panel 17 is installed, the display plate 17 can be made smaller. As a result, the radius of rotation of the display plate 17 becomes smaller, so that the distance between the front surface of the case 2 and the display plate 17 can be made smaller. It is. Therefore, the display state of the display plate 17 becomes easily visible. Further, as a result of the turning radius of the display plate 17 becoming smaller, the moment of inertia becomes smaller,
The energy required to rotate the display plate 17 is reduced, and power consumption can be reduced. When fixing the display element configured as described above to the mounting plate 3, an annular waterproof packing 31 fitted around the projecting base 25 is used as shown in FIG. Waterproof packing
Numeral 31 is formed by integrally forming an inner ring 32 that is in close contact with the protruding base 25 and an outer ring 33 that is formed so that the diameter increases as the distance from the mounting plate 32 increases. The thickness of the waterproof packing 31 in the projecting direction of the projecting table 25 is set to be slightly larger than the projecting amount of the projecting table 25. However, a mounting hole 34 is formed in the mounting plate 3 so that the terminal pins 15 and the fixing screws 24 are exposed, and the waterproof packing 31 is fitted around the pedestal 25. 3, the waterproof packing 31 is compressed between the case body 21 and the mounting plate 3 so that the water from the front side to the rear side of the mounting plate 3 is compressed. Intrusion can be prevented. When a plurality of display elements are collectively covered with a large transparent plate, the case 2 may be removed and the display element 1 may be used alone. That is, as shown in FIG. 2, the terminal pins 15 of the display unit 1 may be electrically connected to the printed wiring board 36, and the base 11 may be mechanically fixed to the printed wiring board 36 by the fixing screws 24. When used in this way, the number of display units 1 per unit area can be increased as compared with the case where case 2 is used. If the case 2 is not used, it is possible to use a large (square) display panel 17 as shown in FIG. 2 (b). In the above-described configuration example, the rotating shaft 18 is provided on the display plate 17 and the bearing 15 is provided on the coil bobbin 13. Alternatively, the bearing may be provided on the display plate 17 and the rotating shaft may be provided on the coil bobbin 13. Good. In the above configuration, two display units 1 are provided in the case 2, but three or more display units 1 may be provided.

Embodiment 1 In the above-described reference example, the terminal pins 15 protruding from the respective display units 1 housed in the case 2 are individually drawn out of the case 2. The diameter of the protruding stand 25 provided at the part to be drawn out increases, and as a result, the size of the waterproof packing 31 increases. In this embodiment, as shown in FIG. 4, a printed wiring board 26 for mounting the display unit 2 is provided in the case 2 and the coils 14 of the display unit 2 in the case 2 are connected in parallel by the printed wiring board 26. The terminal pins 15 connected to each connection point are protruded from the printed wiring board 26 and drawn out of the case 2. In other words, the terminal pins 15 pulled out from the stand 25 are the same as when only one display unit 1 is mounted in the case 2 and
The fifteen connections and the shape of the waterproof packing 31 can be made common. Connection of the coil 14 is as shown in FIG. 5, the middle point of each coil 14 is connected to the terminal pin 15 as a common terminal, the diode D ₁ ~ for preventing reverse flow to both ends of the coils 14 it is to connect to the terminal pin 15 via a D _4. Here, the diodes D _{1 to} D ₄ are mounted on the printed wiring board 26 together with the coil 14. According to the above configuration, regardless of the number of display units 2 housed in the case 2, as shown in FIG.
Only three terminal pins 15 protrude from the case 2 so that the connection can be made common and the same waterproof packing 31 can be used. In addition,
The display units 1 housed in one case 2 are connected in parallel and driven at the same time, and therefore have the same configuration. The other configuration is the same as that of the reference example, and the description is omitted.

Embodiment 2 In this embodiment, as shown in FIG. 7, when the display surface of the display panel 17 of the two display units 1 housed in the case 2 is not facing front, the display panel 17 Are arranged so as to face each other. According to this configuration, when the display surface is not facing the front (that is, when in the non-display state), the two display plates 17 cover each other, and in the non-display state, display is performed from any orientation. This makes it difficult to see the surface, prevents blurring of the display, and provides a display with good contrast. Another configuration is the first embodiment.
The description is omitted here.

【The invention's effect】

According to the configuration of claim 1, the display unit is removably mounted in the case and the display unit is configured as described above, so that the display plate can be rotated only by the display unit without the case. It is. That is, when a display device is configured using a plurality of display elements, only a display unit can be used without using a case, and the arrangement density of display panels can be increased by the thickness of the case. Further, there is an advantage that the cost can be reduced by the amount of the case. Further, at the time of assembling, the display unit can be assembled independently of the case, so that the assembling work is facilitated. Moreover, since a plurality of display units are housed in the case, the distance between the case and the display plate relative to the size of the front surface of the case is compared with the case where one display unit is housed in the case. Can be reduced, and the display surface of the display panel can be easily recognized. In addition, since the display panel of each display unit can be made smaller and the moment of inertia becomes smaller, the power required to reverse the display panel can be reduced. In addition, each display unit housed in the case has the same configuration, the coils of each display unit are connected in parallel, and the terminals electrically connected to the coils are drawn out of the case. Even when a plurality of display units are provided in the case, there is an advantage that the connection can be made in the same manner as in the configuration in which only one display unit is provided. According to the configuration of claim 2, the two display units mounted in the case are arranged so that the display surfaces face each other at a position where the display plate intersects the front surface of the case. When the surface intersects the front surface of the case, blurring of the display is reduced, and the contrast is improved. According to the configuration of claim 3, since the rear of the display plate in the display state in the case is opaque, the rear surface of the display plate is not visible from the outside in the display state, and the appearance is improved.

[Brief description of the drawings]

1 (a) and 1 (b) are a cross-sectional view and a front view, respectively, showing a reference example of the present invention, FIG. 2 (a) is an exploded perspective view of the same example with a case removed, and FIG. FIG. 3 is a perspective view showing another example of the display plate, FIG. 3 is an exploded perspective view showing a state of attachment to the attachment plate with the above case attached, FIG. 4 is a sectional view showing Example 1 of the present invention, FIG. 5 is a circuit diagram showing an example of connection of coils in the above, FIG. 6 is an exploded perspective view showing a state of being attached to a mounting plate with the above case attached, and FIG. 7 is a second embodiment of the present invention. FIG. 1 Display unit 2 Case 11 Base 12
... iron core, 14 ... coil, 16 ... bearing, 17 ... display panel, 18
…… Rotating shaft, 19… Permanent magnet, 21 …… Case body, 22…
... transparent cover.

Continuation of the front page (56) References JP-A-57-34585 (JP, A) JP-A-61-121484 (JP, U)

Claims (3)

(57) [Claims] 1. A case having at least a transparent front surface, and a display plate which rises and falls between a position substantially parallel to the front surface of the case and a position intersecting with the front surface of the case, and is removably mounted in the case. A plurality of display units, each of the display units is provided with a base integrally formed with a coil bobbin on which a coil can be wound, and each display unit can be fixed at a fixed position in the case, and is inserted through the coil bobbin. A permanent magnet capable of exerting a magnetic force between the other end surface of the iron core and the display core, and a connecting member attached to the iron core. Are fixed, the display plate is pivotally mounted on the connecting member at a position where the display plate can be rotated by the magnetic force between the iron core and the permanent magnet, and each display unit housed in the case has the same configuration. And the coil of each display unit is The terminal is mounted on the printed wiring board fixed to the base and fixed in parallel, connected in parallel, electrically connected to the coil, and a terminal protruding from the printed wiring board is drawn out of the case to the outside. Display element. 2. The display device according to claim 1, wherein two display units are housed in the case, and both display units are arranged so that display surfaces face each other at a position where a display plate intersects a front surface of the case. The display device according to claim 1. 3. The display element according to claim 1, wherein a rear part of the case is opaque when the display plate is substantially parallel to a front surface of the case.