JPS60225220A - Coordinate input device - Google Patents

Abstract

PURPOSE:To obtain a coordinate input device stable in quality by using an insulating film where a resistance body is preliminarily formed throughout one face. CONSTITUTION:A transparent resistance body 2 is formed with a uniform thickness on the whole of one face of a flexible insulating film 1. Band-shaped electrodes 3 are formed in two sides facing each other of this resistance body 2, and an insulating film 4 is formed on four sides including an external connection part 1a. This film 4 is provided with window parts 4a where a part of both band-shaped electrodes 3 are exposed, and electrodes 3 are connected to a lead electrode 5 through these window parts 4a and are led out onto said external connection part 1a. An insulating film 1' is formed similarly, and both insulating films 1 and 1' are arranged to face each other with a spacer 6 between them for the purpose of detecting coordinates in X and Y directions. When the upper insulating film 1 is pressed, upper and lower resistance bodies 2 and 2' are brought into contact with each other and are connected electrically, and coordinate voltage values (current values) at this time are taken out in X and Y directions to detect the position of the pressed point.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention provides a thin-film type coordinate input device, specifically, an insulating film on which a resistor is formed.

The present invention relates to a coordinate input device that detects coordinate values in the Y direction.

[Background of the invention]

This type of coordinate input device is widely used as an input device for figures, symbols, coordinate values, etc. in office computers, personal computers, various measuring instruments, communication devices, and the like.

Generally, a resistor is formed on a predetermined portion of the insulating flexible film, and a parallel strip-shaped electrode and a lead electrode connected thereto are formed on other portions where the resistor is not formed. The two insulating films thus formed are made to face each other with a spacer interposed therebetween.

However, the above-mentioned resistor is formed in a predetermined area by printing or the like on an insulating film, or by mechanically or chemically selectively removing the resistor on an insulating film that has a resistor applied to the entire surface. Therefore, in the former case, there are problems with the printing accuracy of the resistor, and in the latter, there are problems with the mechanical cutting accuracy or chemical etching accuracy of the resistor, as well as workability. This was one of the bottlenecks for improvement.

[Purpose of the invention]

Therefore, an object of the present invention is to solve the above-mentioned drawbacks of the prior art, and to use an insulating film with a resistor formed on the entire surface of one side in advance, and to input coordinates that can be manufactured without removing the resistor by etching or the like. The goal is to provide equipment.

[Structure of the invention]

In order to achieve the above object, the coordinate input device of the present invention is configured to detect the coordinate values of a pressing point in the X and Y directions using a flexible insulating film formed with a resistor. A resistor is formed on the entire surface of one side, strip electrodes are formed in parallel on the sides of the resistor, and an insulating coating with a window is applied on the strip electrode. The lead electrode connected to the strip electrode is led out from above the insulating coating to the external connection part.

[Embodiments of the invention]

The drawings all relate to one embodiment of the present invention, and FIGS.
(c) is a plan view showing the manufacturing process; FIG. 2 is a plan view showing the other insulating film facing the insulating film in FIG. 1;
FIG. 3 is a sectional view of the main part in an assembled state.

In FIG. 1, reference numeral 1 denotes a flexible insulating film. For example, when forming a transparent touch panel, a transparent thin synthetic resin film is used, and a transparent resistor 2 is preliminarily coated with a uniform thickness on one side of the film. It is formed. This film has resistors 2 continuously formed on a long material, and is very productive, and is cut into the shape shown in FIG. 1(a).

Then, on the two opposing sides of the resistor 2, strip electrodes 3 are first placed.
．． 3 are formed in parallel by means such as printing, and then as shown in FIG.
As shown in b), the insulating coating 4 is formed by printing on the four sides of the resistor 2 including the strip electrode 3.3 and on the external connection portion la. At this time, the insulating coating 4 is provided with a window 4a that exposes a portion of both strip-shaped electrodes 3. Next, a lead electrode 5 connected to the strip electrode 3.3 through this window 4a.
．． 5 is formed by printing on the insulating coating 4, as shown in FIG. 1(c), and is led out onto the external connection portion la.

Using exactly the same method as above, a second
As shown in the figure, a strip electrode 3', an insulating coating 4', and a lead electrode 5' are formed in this order. However, if the strip electrode 3 is for detecting in the X direction, the strip electrode 3' in FIG.
In order to detect the direction, the lead electrodes 3p are formed on two opposing sides on the side where the strip electrode 3 is not formed, and the lead electrodes 3p are formed when the insulating film 1' is turned over from the illustrated state to face the insulating film 1. 3 is formed on the external connection part 1'a so as not to overlap with the external connection part 1'a.

The two insulating films l and 1' are arranged facing each other with an appropriate distance between them as shown in FIG. , the upper and lower resistors 3.32 contact and conduct with the conductor portion of the spacer 6, and the coordinate voltage value or coordinate current value of this pressing point is taken out in the X and Y directions, respectively.

For example, when forming a transparent touch panel, the spacer 6 may be a transparent flexible insulating thin film resin with many through holes and a transparent conductive film embedded in the center, but the spacer 6 is not limited to this. Instead, it can be replaced with one in which a network made of conductive wires is embedded in a foamed resin, or one using an anisotropically conductive material. Furthermore, in the above embodiment,
Although a method using printing is shown, it is also possible to form electrodes using thin film technology such as vapor deposition, and the insulating film and resistor do not need to be transparent materials, and the position and shape of external connections can also be changed from the example. It is not limited. Furthermore, although a configuration in which the resistors are vertically opposed is shown, the input device can be configured with even one resistor if the resistor is configured to be opposed to a conductive sheet.

[Effects of the Invention] As described above, according to the present invention, since there is no step of partially forming the resistor on the insulating film, the manufacturing process is easy and the resistor can be stably manufactured without variations in positional accuracy. This has the advantage of being able to provide high-quality coordinate input devices with a high yield rate.

[Brief explanation of the drawing]

The drawings all relate to one embodiment of the present invention, and FIGS.
(C) is a plan view showing the manufacturing process; FIG. 2 is a plan view showing the other insulating film facing the insulating film in FIG. 1;
FIG. 3 is a sectional view of the main part in an assembled state. 1.1j...Insulating film, la, 1'a...
...External connection part, 2.2p...Resistor, 3
．． 32...Strip electrode, 4.4P...Insulating coating, 4a, 4' a...Window, 5゜5j.
...Lead electrode, -6...Spacer. Figure 1(a)

Claims (1)

[Claims] In a configuration in which a flexible insulating film on which a resistor is formed is used to detect the coordinate values of a pressing point in the X and Y directions, a resistor is formed on the entire surface of one side of the insulating film, and the resistor on the resistor is Strip-shaped electrodes are formed in parallel on the sides, an insulating coating with a window is applied on the strip-shaped electrode, and a lead electrode connected to the strip-shaped electrode through the window is connected to the outside from above the insulating coating. A coordinate input device characterized in that the coordinate input device is guided to a connecting portion.