JPH0546102Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a curved sensor plate, and is particularly useful as a sensor plate for a digitizer used by being attached to the image surface of a cathode ray tube.

[Prior Art] As a sensor plate of a digitizer attached to the image plane of a cathode ray tube, for example,
There is one disclosed in Publication No. 62-59326.

This sensor plate has a structure in which conductor wires are embedded in a matrix in a transparent resin flat plate.

[Problems to be solved by the invention] As described above, the conventional sensor plate has a flat plate shape.

However, since the image surface of a cathode ray tube is curved, when a flat sensor plate is attached to the front of the image surface of the cathode ray tube, the image surface of the cathode ray tube and the sensor plate are almost in close contact with each other in the center; The distance between the two increases as you move away from the part. For this reason, in the peripheral area, the correspondence between the position of the image plane of the cathode ray tube and the position of the sensor plate differs depending on the viewing angle of the operator, resulting in a problem that input accuracy is reduced.

Therefore, an object of this invention is to provide a curved sensor plate that has a shape that conforms to the curvature of the image plane of a cathode ray tube and that can obtain high input accuracy even in the peripheral area of the image plane.

[Means for Solving the Problems] The curved sensor plate of this invention has grooves formed in a lattice pattern on the convex side of a transparent insulating curved plate that has been formed into a curved shape in advance, and is engaged with lattice points located at the periphery. The device is characterized in that it is provided with portions, is locked to these locking portions, and is fitted into the groove to wire an ultra-fine wire, and the wiring surface is covered with a transparent member. .

In addition, the curved sensor plate of this invention has grooves formed in a lattice pattern on the convex side of a transparent insulating curved plate that has been formed into a curved shape in advance, and locking portions are provided at the lattice point portions located on the periphery, and these locking portions are provided. The structure is characterized in that a gold-plated ultrafine tungsten wire is wired by being engaged with the groove and being fitted into the groove, and the wiring surface is covered with a transparent member.

In the above configuration, it is preferable that the "locking part" is a pin that is erected at a position such that the pin wall is located inward from the center line of the groove by the radius of the ultra-thin wire.

[Function] In the curved sensor plate of this invention, grooves are formed in a grid pattern on the convex side, and ultra-fine wires are inserted into the grooves for wiring.
It functions as an input device.

On the other hand, unlike conventional sensor plates, because it has a curved shape, it comes into close contact with the image plane of the cathode ray tube, both in the center and in the periphery, without creating large gaps. Therefore, the correspondence between the position of the image plane of the cathode ray tube and the position of the curved sensor plate is prevented from varying depending on the viewing angle of the operator, and input accuracy can be improved.

Further, if the ultra-fine wire is made of gold-plated tungsten wire, good characteristics in terms of mechanical strength and solderability can be obtained.

[Example] Hereinafter, this invention will be explained in more detail based on the example shown in the drawings. Note that this invention is not limited to this.

FIG. 1 is a perspective view showing a state in which a curved sensor plate 1 according to an embodiment of the invention is attached to an image plane B of a cathode ray tube A.

As shown in an exploded perspective view in FIG. 2, this curved sensor plate 1 has grooves 3 formed in a lattice shape on the convex side of a transparent and insulating curved plate 2, and lattices located at the periphery of the curved plate 2. A large number of pins 4 are set up at the point, and the ultra-fine wire 5 is laid by hooking on these pins 4 and fitting into the groove 3, and the wiring surface is covered with a transparent and insulating second wire.
It has a structure covered with a curved plate 6.

As shown in detail in FIG. 3, the pin 4 is positioned inward from the center line of the groove 3 by the radius of the ultra-fine wire 5 so that the ultra-fine wire 5 is located along the center line of the groove 3. The location is such that a pin wall exists. Figure 4 shows this in cross section, and
-X sectional view.

FIG. 5 is a sectional view of the curved sensor plate 1, in which the curved plate 2 and the second
The curved plate 6 is integrated with the adhesive 7.

FIG. 6 shows a state in which the curved sensor plate 1 is attached to the image plane B of the cathode ray tube A with an adhesive 8.

In addition, as a material for the curved plates 2 and 6, for example, a transparent acrylic plate can be used. Groove 3
may be formed by cutting, or the curved plate 2 may be formed into a grooved shape.

As the material of the pin 4, for example, transparent acrylic or non-magnetic metal (aluminum) can be used. The pin 4 may be provided in the curved plate 2 with a pin hole, and the pin 4 may be inserted into the pin hole and bonded, or the curved plate 2 having the pin 4 may be formed. Further, it may be provided at a position other than the position shown in FIG. 2 depending on the wiring pattern.

The ultra-thin wire 5 needs to have a tensile strength that can withstand the tension applied when wiring the curved sensor plate 1. Furthermore, in order to connect the terminal lead of the ultra-fine wire 5 to a connector or the like, good solderability is also required.

For this reason, as the ultra-fine wire 5, an insulated wire made of a gold-plated tungsten wire coated with urethane is most suitable. Tungsten wire is about 10 times smaller than copper wire
It has twice the tensile strength and can withstand the tension of wiring. Moreover, good solderability can be obtained by applying gold plating. Also, lines are easier to see during production, and the influence of line shadows on the image plane is reduced.

The diameter of the ultra-fine wire 5 is 5 μm or more in the direct diameter and 20 μm or less,
In particular, it is preferably about 10 μm. That is,
If the line is smaller than 5 μm, it will be extremely difficult to see the line, making it difficult to handle during production. On the other hand, if it exceeds 20 μm, it becomes too visible and becomes an eyesore when a precise drawing is displayed on the image plane B. On the other hand, a thickness of about 10 μm is most preferable because it is visible to some extent, making it easier to handle during manufacturing, and it is virtually invisible when compared with the lines in the drawing.

As the adhesives 7 and 8, an ultraviolet curing adhesive or a transparent silicone adhesive can be used. When an ultraviolet curable adhesive is used as the adhesive 8, it may be cured by irradiating ultraviolet rays from the outside of the second curved plate 6.

[Effects of the invention] According to the curved sensor plate of this invention, when it is attached to the image plane of the cathode ray tube, both the center and the peripheral parts are in close contact with each other, so that the position of the image plane of the cathode ray tube and the curved sensor plate are close to each other. The correspondence between the positions does not vary depending on the viewing angle of the operator. Therefore, high input accuracy can be obtained both in the center and in the peripheral areas of the image plane.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a curved sensor plate according to an embodiment of this invention attached to a cathode ray tube, Fig. 2 is an exploded perspective view of a curved sensor plate according to an embodiment of this invention, and Fig. 3 is a pin 4 is a sectional view taken along line XX in FIG. 3, FIG. 5 is a sectional view of a curved sensor plate according to an embodiment of this invention, and FIG. FIG. 3 is a cross-sectional view of the curved sensor plate shown in FIG. 1 attached to a cathode ray tube. Explanation of symbols, 1...Curved sensor plate, 2...Curved plate, 3...Groove, 4...Pin, 5...Superfine wire, 6
...Second curved plate, 7, 8...Adhesive, A...Cathode ray tube, B...Image surface.

Claims (1)

[Claims for Utility Model Registration] 1. Grooves are formed in a lattice pattern on the convex side of a transparent insulating curved plate that has been formed into a curved shape in advance, and locking portions are provided at the lattice point portions located on the periphery, and the locking portions are provided with locking portions. A curved sensor plate characterized in that it is locked and fitted into the groove to wire a very fine wire, and the wiring surface is covered with a transparent member. 2. Grooves are formed in a lattice pattern on the convex side of a transparent insulating curved plate which has been formed into a curved shape in advance, and locking portions are provided at the lattice point portions located on the periphery, and locking portions are secured to the locking portions and the grooves are inserted into the grooves. A curved sensor plate characterized in that it is fitted into a tungsten wire and wired with a gold-plated ultrafine tungsten wire, and the wiring surface is covered with a transparent member. 3. The curved sensor plate according to claim 1 or 2, wherein the locking portion is a pin that is erected at a position such that the pin wall exists inside the center line of the groove by the radius of the ultra-thin wire.