JPH06266491A - Input device - Google Patents

Abstract

PURPOSE:To prevent a defect of linearity of an input device by performing the resistance value correction for input electrode terminals formed on electrode substrates in the input device where electrode terminals for input are formed on the surfaces of respective electrode substrates and substrates are so arranged that respective electrodes face each other through plural spacers having the electrodes insides. CONSTITUTION:Transparent electrodes 3 are formed on a PET film 1 and a soda glass 2 to form prescribed patterns. Electrode terminals 4 for input are printed on them by screen printing and baked An epoxy adhesive containing a prescribed gap material is printed as a seal material 6 on one substrate by screen printing, and spacers 5 are scattered on the substrate, and respective electrode substrates are adhered so as to be arranged to face each other. Electrode terminals for input are formed by shifting by alpha=1.5 deg. from the horizontal direction in consideration of the voltage effect in electrode terminals for input to realize the input device where the linearity is secured. Thus, the input device is subjected to resistance value correction to prevent a defect of linearity of the large-sized input device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an input device, and more particularly to resistance value correction of the input device.

[0002]

2. Description of the Related Art Conventionally, an input electrode terminal of an input device is formed in parallel with each electrode substrate as shown in FIG. 11, and an input device in which they are arranged orthogonally and facing each other has been known ( For example, Japanese Patent Laid-Open No. 3-191417,
(See Japanese Patent Laid-Open No. 3-226820).

[0003]

However, as the size of the input device increases, a voltage drop occurs inside the input electrode terminal due to the specific resistance value of the input electrode terminal, which becomes more remarkable as the distance from the power source increases. Has been confirmed. The voltage applied to the input electrode terminals facing each other in parallel on each electrode substrate is not constant at any point of the input electrode terminals for the above reason, and as a result, as shown in FIG. Even if the voltage at each point is measured, the equipotential lines as shown in FIG. 13 are drawn, and the linearity defect that interferes with the position detection of the input device that operates by reading the voltage is separated from the vicinity of the electrode terminals and the power supply. Occurred in some places. The linearity defect referred to here is as shown in FIG.
When a straight line is input in parallel with the input electrode terminal of the input device in 3), it is recognized that it is input at a position completely different from the input position, and higher precision will be required in the future. This is one of the fatal defects in any input device.

As a material having a low specific resistance value, Au,
Although paste agents such as Ag are known, they are currently expensive and have problems in terms of cost.

Therefore, the present invention solves such a problem, and an object thereof is to make the linearity of the input device compatible with an increase in size and to provide it at a low cost.

[0006]

SUMMARY OF THE INVENTION An input device according to the present invention is one in which input electrode terminals are formed on the surface of each electrode substrate, and the electrodes are placed inside and the substrates are opposed to each other via a plurality of spacers. In the above, the resistance value correction is performed on the input electrode terminal formed on at least one of the electrode substrates.

[0007]

【Example】

[Embodiment 1] FIGS. 1A and 1B are a perspective view and a sectional view of an input device used in the present embodiment. Here, the upper substrate 1 was a PET (polyethylene terephthalate) film having a thickness of 125 μm, and the lower substrate 2 was a soda glass having a thickness of 1.1 mm. Reference numeral 3 is a transparent electrode, 4 is an input electrode terminal having a thickness of 10 μm, 5 is a spacer, and 6 is a sealing material.

In the manufacturing method of the present input device, the transparent electrode 3 is formed on the PET film 1 and the soda glass 2 by the low temperature sputtering method, and a predetermined pattern is formed by the photolithography method. The input electrode terminal 4 is formed by screen-printing and baking the input electrode terminal 4 thereon. Next, an epoxy adhesive containing a predetermined gap material as a sealing material 6 is screen-printed on one of the substrates, and a spacer 5 is sprayed onto the substrate by a wet spray method, and the respective electrode substrates are arranged facing each other. I glued it as it was done. The dispersion density of the spacers was 50 co / mm ² .

Next, the input electrode terminal which is a characteristic part of the present invention will be described in detail.

Considering the voltage drop inside the input electrode terminal,
An input device in which each input electrode terminal is formed by deviating from the horizontal direction by α = 1.5 ° as shown in FIG. 2 is manufactured by the above manufacturing method, and the voltage at each point as shown in FIG. Was measured, the equipotential lines as shown in FIG. 3 could be drawn. This shows that the input device can ensure the linearity properly. Here, α is a constant determined by various factors such as the specific resistance value of the input electrode terminal, the thickness, the length, and the applied voltage.

On the other hand, a conventional input device will be described below for comparison.

First, an input device in which input electrode terminals are formed parallel to the sides of the substrate as shown in FIG. 11 is manufactured by the above manufacturing method, and each of the active areas 7 in the active area 7 as shown in FIG. 12 is manufactured. The voltage at the point was measured. As a result,
It is possible to draw equipotential lines as shown in FIG. This is an input device that is said to have poor linearity due to the voltage drop inside the input electrode terminals.

[Embodiment 2] In the manufacturing method of Embodiment 1, the input electrode terminal of the input device is l = 50 m as shown in FIG.
Example 1 also in the case of forming a step shape with m and t = 1.3 mm
The same effect as was obtained.

[Embodiment 3] An input device is manufactured by the manufacturing method of Embodiment 1, and as shown in FIG. 5, β = 1.
Even when a trapezoidal input electrode terminal having a hypotenuse of 5 ° was formed, the same effect as in Example 1 was obtained.

[Fourth Embodiment] A large-sized input device is manufactured by the manufacturing method of the first embodiment, and as shown in FIG.
Even when a V-shaped input electrode terminal having a hypotenuse of = 1.5 ° was formed and a power source was connected to the valley, the same effect as in Example 1 was obtained.

[Embodiment 5] According to the manufacturing method of Embodiment 1, as shown in FIG. 7, the electrodes immediately below the input electrode terminals of the input device are
The same effect as in Example 1 was obtained even when the resistance value was increased on the side closer to the power supply by electrode patterning or the like and the resistance value was decreased on the far side. In addition, the same effect as in Example 1 was obtained when the insulator for correcting the resistance value was formed between the input electrode terminal and the electrode.

[Sixth Embodiment] In the manufacturing method of the first embodiment, as shown in FIG. 8, the electrodes from the input electrode terminals of the input device to the active area have a resistance value close to the power source due to electrode patterning or the like. The same effect as in Example 1 was obtained when an electrode having a large resistance and a small resistance value was formed on the far side.

[Embodiment 7] An effect similar to that of Embodiment 1 is obtained when an input device is manufactured by the manufacturing method of Embodiment 1 and the power source is connected to the center of the input electrode terminal as shown in FIG. was gotten.

[Embodiment 8] An input device is manufactured by the manufacturing method of the embodiment 1, the connection positions of the power supplies are staggered as shown in FIG. 10, and the input device is displaced from the horizontal direction by δ = 1.5 °. The same effect as in Example 1 was obtained when the active area was taken.

[0020]

As described above, according to the present invention, it is possible to provide a high-performance input device which prevents the linearity defect of the large-sized input device by correcting the resistance value in the input device at a low cost. Has the effect.

[Brief description of drawings]

FIG. 1 is a diagram showing an input device of the present invention.

FIG. 2 is a diagram showing a first embodiment of the present invention.

FIG. 3 is a diagram showing a first embodiment of the present invention.

FIG. 4 is a diagram showing a second embodiment of the present invention.

FIG. 5 is a diagram showing a third embodiment of the present invention.

FIG. 6 is a diagram showing Embodiment 4 of the present invention.

FIG. 7 is a diagram showing Embodiment 5 of the present invention.

FIG. 8 is a diagram showing Embodiment 6 of the present invention.

FIG. 9 is a diagram showing Embodiment 7 of the invention.

FIG. 10 is a diagram showing Example 8 of the invention.

FIG. 11 is a diagram showing an input electrode of a conventional input device.

FIG. 12 is a diagram showing voltage measurement points.

FIG. 13 is a diagram showing a voltage measurement result of a conventional input device.

[Explanation of symbols]

 1. Substrate on PET film 2. Lower soda glass substrate 3. Transparent electrode 4. Input electrode terminal 5. Spacer 6. Sealing material 7. Active area

Claims (3)

[Claims] 1. An input device in which input electrode terminals are formed on the surface of each electrode substrate, and the electrodes are disposed inside and the substrates are opposed to each other via a plurality of spacers, and at least one of the electrode substrates is provided. An input device characterized in that a resistance value is corrected for a formed input electrode terminal. 2. The input device according to claim 1, wherein resistance correction is performed on at least one of the electrodes of the electrode substrate. 3. The input device according to claim 1, wherein resistance value correction is performed at a connection position between the input electrode terminal of the electrode substrate and a power source.