JPS6017155B2 - input device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an input device using a pen touch method.

2. Description of the Related Art Recently, with the widespread use of computers, there has been a growing demand for simple information input devices.

As one method for satisfying this requirement, an information input device using a Bentouch method has been proposed. For example, in the first example of an information input device using a pen touch method, light emitting diode elements are arranged in a matrix on an information board, the light emitting diode elements are sequentially scanned to emit light, and the light is emitted by a light receiving element provided inside the input pen. There is a method of detecting and identifying input information by combining.

Another second example is a method in which voltage is sequentially applied to electric wires arranged in a matrix, and the applied voltage is detected by capacitive coupling with an electrode provided at the tip of an input pen to identify input information. .

However, in the first example, it is necessary to arrange a large number of light emitting diodes in a matrix, and it is necessary to select light emitting diode elements with uniform luminance, which not only reduces the yield, but also reduces the yield rate. It is difficult to avoid the dependence of the light emission brightness on the sound intensity, and the degree of optical coupling is also affected by dirt on the information board or input pen, which may impede normal information input operations.

In the second example, changes in humidity may cause changes in the electrostatic bonding force, leading to malfunctions.

In addition, in both the first and second examples, the information detection section depends on the input pen, so there is a dew line for returning the information detection signal generated inside the input pen to the main body of the device, and there is also a dew line inside the input pen. An electric wire for supplying power to the information detection section must be interposed between the input pen and the main body of the device.

The electric wire attached to the input pen not only obstructs the operation, but also bends and stretches the electric wire due to the movement of the input pen, causing fatigue of the electric wire, which ultimately causes an accident of disconnection of the electric wire. . Furthermore, a complex detection mechanism for detecting weak light and voltage changes must be installed inside the input pen, and the detection mechanism must be housed in a pencil-shaped container that is easy to hold in the hand due to the operability of the input pen. There are restrictions that must be met.

Therefore, input pens are generally expensive and have the disadvantage of being prone to failure. An application for a display device that displays input data from a direction different from the above.

JP-A-51-4733 mentions a combination of a magnetic field generating means and a memory element (core matrix) as a method.
There is No. 1, but this invention reverses the residual magnetic flux of the memory element (core matrix) arranged on the memory board by moving the magnet Ben on the memory board, and the magnetic flux that was previously input to the memory board with the magnet Ben is reversed This invention relates to a display device for handwritten characters, etc., which is capable of storing character patterns or input figures, reading out the stored contents, and displaying them on a display slope as pattern information corresponding to the stored patterns. Therefore, it cannot be applied to input devices that must process input information in chronological order. [Object of the Invention] The present invention has been proposed in view of the above background, and its purpose is to provide a reversing means for periodically reversing the magnetization direction of a storage core, and a reversing means for reversing the magnetization direction of the storage core by the reversing means. Detecting means for detecting the induced power generated by the reversal of the magnetization direction of the
The purpose of this invention is to propose an input device that can handle changes in temperature, humidity, and dirt with high reliability.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

Figure 1 shows the base structure within the information board 1, with a, b,
c. d, e, f, g, h, i, j, k, 1, m, n, o
, p are hollow ferrite memory cells corresponding to each information on the information board, and address lines X1, X2, X3
, X4 and two groups of conducting wires Y1, Y2, Y3, and Y4 form a matrix that is orthogonally penetrated. At the same time, each ferrite memory core (a to p) is also completely penetrated by the information line S. FIG. 2 is an enlarged view of the ferrite magnetic core f section of FIG. 1, and the solid line arrow 1 and the broken line arrow L indicate the direction of magnetization of the ferrite magnetic core f.

FIG. 3 is a sectional view showing an example of the input pen 2 used in the present invention, in which a permanent magnet 11 is housed in a case 10 made of a magnetically shieldable material such as permalloy.

The permanent magnet 11 is connected to a vertically movable pen tip 13 in a storage space 14 for the pen tip through a certain space by a coil spring 12 made of a non-magnetic material. A suitable material for the pen tip 13 is, for example, ferrite, which has little residual magnetism and emits a magnetic field to the outside only while in contact with the magnet 11. With the above configuration, when the operator presses the pen tip 13 against the information board 1, the force causes the coil spring 12 to contract, causing the pen tip 13 to come into contact with the magnet 11, thereby emitting a magnetic field to the outside. Pen nib 1
3 separates from the information board 1, the pen tip 13 and the magnet 11 separate, and the magnetic path is substantially cut off, so that the generation of an external magnetic field also stops. FIG. 4 shows a state in which the ferrite magnetic cores c arranged in a matrix in the information board 1 are selected according to the magnetic field generated by the magnetic field generator 4 provided inside the input pen 2. .

Next, the operation and effect in the above embodiment will be explained.

Address lines x1, X2, X3, X4 and Y1, Y2, Y
Three conductive wires are provided from each of the wires 3 and Y4, and a pulse current of a magnitude l1 l (not shown in the figure) is passed through them.

For example, in FIG. 1, address line X2. When the pulse current 1 is applied to Y2 in the direction shown by the arrow, the ferrite magnetic core f at the intersection of the address lines X2 and Y2 is caused by the pulse current 1 flowing simultaneously through the address lines X2 and Y2 The magnetization is stored in the direction of the day indicated by the solid line arrow shown in FIG. 2 (hereinafter this state will be referred to as the day state).
At this time, address line
The ferrite memory magnetic cores e, g, h through which the address line Y2 passes and the ferrite memory magnetic cores b, j, n through which the address line Y2 passes are
The pulse current 1 only flows through the address line X2 or Y2, and the other address lines X1, X3, X4 and Y1, Y3, Y which are orthogonal to the address line X2 or Y2
By taking advantage of the fact that no current flows through 4, magnetization memory effect on the state of the day does not occur.

In addition, the ferrite memory cells Da, c, d, e, g, h, i, k that are not penetrated by the address lines X2 and Y2 are
, 1, m, n, o, p are the address lines X1, X3,
Since no current flows through any of X4, Y1, Y3, and Y4, no effect is exerted on them.

Next, when a pulse current of -1 is applied to the address lines x2 and Y2, the direction of the current is opposite to that described above and the magnitude is the same.
The ferrite storage center f is stored with magnetization reversal in the direction of the dashed arrow L shown in FIG. 2 (hereinafter this state will be referred to as the L state). Similarly, address lines x1, X2, X3,
4, Y1, Y2, Y3, and Y4 as a set, and by alternately passing pulse currents of 1 and -1 through the set, any ferrite memory can be created. A magnetization reversal phenomenon can be caused in the core (a to p).

The magnetization reversal that occurs when transitioning from the day state to the L state (or from the L state to the day state) causes an induced voltage in the information line S that passes through the ferrite magnetic core (a to p). Therefore, by detecting the induced voltage appearing on the information line S, it is possible to determine the magnetization reversal of a specific ferrite storage magnet "○".

That is, in the present invention, the information line S detects the transfer voltage due to the magnetization reversal of the ferrite magnetic core by alternately passing pulse currents 1 and 1 in opposite directions to the address lines X and Y. Focusing on this phenomenon, we attempt to prevent the magnetization reversal of the ferrite magnetic core from the outside and utilize the information contained in the position of this blocked ferrite magnetic core.

As shown in FIG. 4, among the parts a, b, c, and d of the ferrite memory cores arranged in a matrix inside the information board 1, a specific ferrite memory core Dc is provided inside the input pen 2. When placed in the magnetic field generated by the magnetic field generator 4 (e.g., a permanent magnet), the ferrite magnetic core c has an N pole on the side closer to the S pole of the magnet I1 and an S pole on the far side, and becomes magnetic. reach a state of saturation. When the pulse currents 1 and 1 are alternately passed through the address lines x1 and Y3 that specify the ferrite magnetic core c, a magnetization reversal phenomenon occurs in the ferrite magnetic core c, which is already in a magnetic saturation state, due to the magnetic field. Since this does not occur, no transfer voltage due to magnetization reversal is detected on the information line S. In other words, even if a driving pulse current is applied to the address line to cause a magnetization reversal phenomenon in a specific ferrite memory core, if no induced voltage is generated in the information line S due to the magnetization reversal phenomenon, the specific ferrite memory core It shows that 100 million magnetic cores have been selected by the input pen. On the other hand, due to the spread of the magnetic flux of the magnetic field generated from the magnetic field generating section 4, there is a possibility that the unselected ferrite memory cells may also be affected by the magnetic field.

In order to prevent this, in this embodiment, a magnetic plate 5 made of ferrite or the like having high transmittance is arranged in close proximity to the ferrite magnetic core of the information board 1. Therefore, the lines of magnetic force that have passed through the selected ferrite magnetic core are shielded by the magnetic plate 6, and other influences are minimized. In short, the magnetization of the ferrite memory magnetic cores (a to p) arranged in a matrix corresponding to each piece of information is periodically and sequentially reversed, and at the same time, the induced voltage accompanying the magnetization reversal can be detected by the information line S. By pressing the information board 1 with the input pen 2 containing the magnetic field generating part 4, it is possible to confirm that the induced voltage due to the magnetization reversal of the ferrite memory core in the proximal support part is no longer detected in the information line S. This is used to determine the information indicated by the input pen 2 in proximity.

In the above embodiment, a total of one needle ferrite magnetic core (a~
Although the case where the magnetic cores p) are arranged in a matrix has been described, it is clear that there is no limit to the number of ferrite memory cores that can be used in principle.

Also, of course, there is no limit to the number of ferrite memory magnets that can be selected at once using the input pen. Furthermore, it goes without saying that the all-line system of ferrite memory arranged in a matrix can produce similar effects in all systems commonly used in core memories of computers.
Furthermore, as long as the magnetic field generating section inside the input pen can bring the required ferrite memory energy into a magnetically saturated state, it is of course possible to obtain the same effect as the above-mentioned embodiment. is possible.

In addition, it goes without saying that various modifications can be made without departing from the gist of the present invention.

〔Effect of the invention〕

As explained above, the present invention provides an input pen equipped with a magnetic field generating section, an information board on which a large number of magnetic cores such as magnetic cores are arranged, and a magnetization direction of the magnetic cores of the information board. A reversing means for periodically reversing the magnetization direction, and a detecting means for detecting a transfer electromotive force generated by the reversal of the magnetization direction of the storage core by the reversing means, and a front input pen is brought close to the information board and the input pen is moved. The magnetic field generated by the magnetic field generator prevents the reversal of the magnetization direction by the reversing means of the storage center near the input pen of the information board, and the electromotive force is not detected by the detecting means. Since the present invention is configured as an input device characterized in that the position information is determined in chronological order by determining the proximity position of the input pen on the information board, the input position information can be processed in chronological order.

Further, by the time of next input position determination, the next input position can be determined by simply performing magnetization reversal without any special processing such as rewriting processing for destructive readout of the storage magnetic core.

In addition, the core memory technology widely used in computers can be used without major changes, making it possible to
This has the effect of making the device highly reliable against changes in humidity and dirt.

Furthermore, since the magnetic field is prevented from reaching areas other than the selected ferrite storage core, reliability can be improved and information density can also be increased.

The applications of the present invention are diverse, and as shown in Figure 1, if kanji are displayed on a ferrite recording magnetic core, it can be used as a kanji input device, as well as various encoding input devices such as a position encoding input device. The present invention can be applied to.

When the present invention is used in a kanji input device, kanji characters, symbols, etc. corresponding to each ferrite memory core may be displayed on an insulating board made of plastic or the like.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a schematic basic configuration diagram inside the information board, Fig. 2 is an enlarged explanatory diagram of the main part of Fig. 1, and Fig. 3 is an illustration of the input pen. The vertical cross-sectional view, FIG. 4, is a cross-sectional view of the information board and an explanatory view of the operation of the input pen. Here, 1... Information board, 2... Input pen, 11... Magnet, a to p... Ferrite memory core, X1, X2, ×3, X4, Y1, Y2,
Y3, Y4: address line, M: magnetic field generating section, S: information line. Figure 2 Tsutomu Figure 3 Leopard Figure 4 Figure 1

Claims (1)

[Scope of Claims] 1. An input pen equipped with a magnetic field generator, an information board in which a large number of storage cores such as magnetic cores are arranged, and reversing means for periodically reversing the magnetization direction of the storage cores of the information board. , a detection means for detecting the induced power generated by the reversal of the magnetization direction of the storage magnetic core by the reversing means, the input pen is brought close to the information board, and the magnetic field generated by the magnetic field generation part of the input pen is used to By preventing the reversal of the magnetization direction by the reversing means of the storage magnetic core at a position near the input pen of the information board, and by not detecting the induced force by the detection means, the position near the input pen of the information board is prevented. An input device characterized in that the input device determines location information according to time series. 2. The input device according to claim 1, wherein the magnetic field generating part of the input pen is a magnet, and the input pen is an independent housing and does not have a connecting part with other parts. 3. The input device according to claim 1 or 2, further characterized in that a magnetic plate is arranged below the storage magnetic core of the information board in close proximity to the storage magnetic core.