DE3335922A1 - Display panel for the visual representation of information - Google Patents

Abstract

A display panel is described for the visual representation of information by means of bistable display flaps which are arranged in rows and columns, are controlled by electromagnets, can rotate about an axis and contain a fixedly anchored permanent magnet which causes the display flaps to turn when electrical pulses are applied; the turning process of the display flaps (6, 6') takes place in both directions as a result of electrical pulses in one flow direction in the energising winding (2, 2'), but of different length and/or different sequence and/or as a result of pulses of different intensity, the two poles of the electromagnet being located opposite similar magnetic poles of the permanent magnet (7, 7') in the energising phase in every position of the display flap (6, 6'), and magnetic repulsion forces acting in this arrangement. Rapid operation of the display flaps is achieved by means of the arrangement described in conjunction with a very low circuitry cost and a minimum structural cost for the display device and the complete display panel. <IMAGE>

Description

Horst Hendel 8O3I Eichenau, the I4.9.1y83

Dipl.-Ing. (FH) Herbststrasse h3

Scoreboard

for the visual representation of information

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Display board for the visual presentation of information

Display board for the visual presentation of information by means of bistable arranged in rows and columns, controlled by electromagnets, rotatable about an axis Display boxes that contain a permanently anchored permanent magnet that reacts to electrical impulses Turning the display flaps causes.

Display elements of this type have long been known in various designs, their display flaps without exception can be switched by reversing the direction of the current in the field winding of the electromagnet, wherein the respective area of the individual display flaps are assigned pulses of a current direction and to this Way to appear or to be deleted. At the beginning of the turning process, the display flaps are included preferably magnetic repulsive forces effective, since magnetic poles of the same name are separated from permanent magnets and facing electromagnet. Magnetic tensile forces, based on permanent magnets and electromagnets, take effect at the end of the flap rotation and almost hold it in its end position.

In the German patent application P 19 ^ 5678 is an embodiment a display element described in more detail. The operation of such display elements requires relatively high expenditure on circuit electronics j due to the reversal necessary when resetting the display flaps the current direction in the field winding of the electromagnet, which is still considerable even when two separate excitation windings are used, one of which Excitation winding is used to appear and the other is used to extinguish. In addition to the significantly higher effort Winding wire is the disadvantage of half utilizing the winding volume, which affects the sensitivity of such display organs.

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Another embodiment variant is the display element contains the german patent DE 27 ^ 3593 C2. Here, too, as in the case of the aforementioned display element, are oagn. Repulsive and tensile forces when switching of the display surfaces, which can be achieved by reversing the direction of the Current is generated in the field winding. The advantage of this arrangement is that by the Coupling of two permanent magnets «Si» bridges large air gaps and are switchable with relatively low excitation energy. The bistable and vibration-resistant The position of the display flaps in the rest position is secured in particular.

The present invention aims to provide an electromechanical. Display element can be operated quickly with the least amount of circuitry, with minimal structural effort on the display element or the entire scoreboard.

This is achieved according to the invention in that for any Turning the indicator flaps, current pulses can only be used in one direction of current. The respective areas the Wenda flaps are only of different lengths StromimpulSQ assigned in the excitation winding and so that desired appearance or deletion of the display area brought about.

It is also grateful that the distinction between appearance and extinction through different pulse strengths © and / or different impulse characteristics can be realized, but always by impulses in one direction of the current. To the turning process the display flaps with impulses one To effect the direction of the current, only magnetic repulsive forces are used generated, which exert a short mechanical shock impulse on the flaps and set them in motion, with which the full turning process is then carried out.

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The duration of the electrical impulses during the turning process of the display flaps extends at most over the time of half the flap opening, since with longer-lasting pulses the turning process is caused by the magnet acting simultaneously in both turning directions. Repulsive forces slow down the display flaps prematurely and thereby the display flaps would assume an undesired central position. The flap, which is set in rotation by a mechanical force pulse, experiences kinetic energy, with the help of which the full turning process is carried out and by means of the magnet. Tensile forces, based on the permanent magnet, at the meanwhile again ^: the neutral pole of the electromagnet, the indicator flap remains bounce-free.

The advantages of the display flaps controlled in this way are that only one excitation winding per low weight Display flap is required, but has the highest effectiveness due to the utilization of the entire winding volume. Two electr. Connections per control coil, which can also be advantageously linked, and are already there Electronic control modules available on the market can be operated. Small working air gap at the beginning the turning process and thin-walled, low-moisture training of the Indicator flaps allow a quick switching sequence of the individual display flaps.

In the following, the method of operation of the inventive Display device explained with reference to Figures 1 to 3:

Fig. 1 geigt the display device in plan view with their

light-dark fields, Fig. 2 shows the display device in section with representation

the electromagnet, Fig. 3 shows the linkage of the excitation winding in a matrix.

From Fig. 2 it can be seen that the electromagnets arranged in the carrier plate (1) consist of a winding (2, 2 *) and a soft iron core (3, 3 ') »are arranged in such a way that

that your pole ends point to the front plate (k) . The front panel (4) is preferably provided with bright fields (5) half the size of the display surfaces, which are just covered by the thin-walled display flap (6, 6) in the erased position.

There is a on the dark side of the display flap (6, 6 ·) Dauermagnet'anendet, which adheres with a pole face to the soft magnetic pole end of the electromagnet and the Indicator flap (6, 6 ·) holds in its rest positions. The display flap (6, 6 ·) itself is attached to two axles (8) on the front plate (4) or the carrier plate (1) rotatably mounted.

In the event of a current pulse, the display flap (6 * 6 ') A short impulse of force via the permanent magnet (7 «7 ') as a result of magnet. Repulsive forces and thereby changes into their other rest position, where this in turn is assigned to the soft magnetic, which has now become neutral The pole end of the magnet core (3, 3 ') remains attached with the help of the permanent magnet (7, 7 <).

When the display flap (6, 6 *) is turned, the light field (5) of the front panel (k) is released and at the same time the light side of the display flap (6, 6 *) becomes visible, which results in a display field.

In order to move the display flap (6, 6 ») into its original position, another pulse with the same current direction is generated in the excitation winding, '. For the distinction between display and clear position of the display flaps (6, 6 ') are being used for different voltages, so that, for example, deletion is achieved below 12 V and indications of 12V. The different responsiveness of the display flaps (6, 6 *) of the display and deletion process is realized by different air gaps between the permanent magnet pole and the electric iron pole of the electromagnet.

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Claims (1)

Pat en t a ns pr iiche 1. j display panel for the visual display of information by means of bistable, arranged in rows and columns, controlled by electromagnets, rotatable about an axis, which contain a permanently anchored permanent magnet that causes the display flaps to turn when electrical impulses, characterized in that the turning process the display flaps (6, 6 ·) takes place in both directions by electrical pulses of one current direction in the excitation winding (2, 2 »), but of different lengths and / or different sequences and / or by pulses of different intensity. 2. ' Display panel according to claim 1, characterized in that the two poles of the electromagnet in the .der excitation phase face magnetic poles of the same name of the permanent magnet (7 _f 7 ') in each position of the display flap (b, 6 ·), with magnetic repulsive forces being effective. 3. Display panel according to claim 1 and 2, characterized in that the control pulses in the field winding (2, 2 ») less than the time of half the turning process, the display flap is effective are. k. Display panel according to Claims 1 to 3, characterized in that only magnetic repulsive forces are effective for the turning process of the display flaps (6, 6 '), the display flaps (6, 6') being held in the rest position by means of magnetic tensile forces, starting from the permanent magnet (7 »7 ') · COPY 5 · Display board according to claims 1 to k, characterized in that the two pole faces of the electromagnet are each opposite the pole face of the permanent magnet (7 »7 ^{1 ) connected to the display flap (6, 6 1} ) and in the non-excitation phase Rest position on the respective pole face of the electromagnet haf * et. 6. Display panel according to claim 1 to 51 characterized in that different responsiveness of the display position to the extinguishing position of the display flaps (6, 6 ¹ ) due to air gap differences between the permanent magnet (7, 7 ') and »Polfl. of the electromagnet is achieved. 7. display panel according to claim 1 to 5, characterized in that the electromagnet is U-shaped and its pole faces lie in one plane. 8. display panel according to claim 1, characterized in that the excitation windings (2, 2 ') of the electromagnets in rows and columns are electrically linked. 9. display panel according to claim 1 to 8, characterized in that the bearing pieces (9, 9 ') of the indicator flaps (6, 6 ¹ ) are fastened to the carrier plate (1) in a forro-locking or frictional locking manner. 10. Display board according to claim 9 » characterized in that the bearing pieces (9 »9 ') for inserting the axes of the display flaps (6, 6 ») are partially deflectable. copy