JPS6286422A - input device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Field of application to which the invention pertains] The present invention relates to a high precision input device.

[Technical background]

To help understand the present invention, first, an overview of the input device of the present invention will be explained.

The input device of the present invention is comprised of a pair of substrates on which input wires are formed on opposing substrate surfaces.

For the input voltage, a plurality of input detection voltages are provided in 1,000 lines on at least one of the substrates forming the input section, and a plurality of detection electrodes are provided for detection! ! It is connected with an electric resistor in the direction crossing the tlfi. Generally, the electrical resistor is formed of a uniform resistor, but when multiple input detection electrodes are formed non-uniformly, the resistance ri of the electrical resistor may be made non-uniform in the cross direction accordingly. Of course, the resistance may also be made uniform in this case.

A voltage detection fine input device having a striped electrode and a uniform resistor according to the present invention will be described. The configuration of the input device includes a uniform resistor 1α having a constant sheet resistance as shown in FIG.
, a substrate 3α and a resistor 1 on which a striped electric cap 2 which is perpendicular to the uniform resistor 1α and conductive thereon is provided.
A striped electrical conductor 2 is provided which intersects and is electrically conductive to a uniform resistor 1b having a sheet resistance equal to or different from the sheet resistance α. , and the substrate 3b, which is easily deformed in a direction perpendicular to the surface, are pasted together with striped electric slats interposed orthogonally to each other via a plurality of insulating spacers.

The contact position detection method of the input device is as shown in FIG.
This is a method of determining by applying a constant voltage to the uniform resistors of the substrates a and 3b at fixed time intervals, and mutually detecting the pressure of each striped electric scepter placed at the contact position. .

In the input device, a printed resistor, a pasted resistor, a vapor-deposited resistor, etc. are arranged on the uniform resistor.
Available. It is also possible to form the input detection voltage and the electric resistor at the same time.

[The point of view that the invention attempts to solve]

However, in the resistor formed by the above method, it is very difficult to produce a uniform resistor with a good yield, and a highly accurate input device cannot be provided.

Therefore, an object of the present invention is to provide an input device that improves the uniformity of the resistance value of a resistor and has high precision and high resolution.

[Means to solve the problem]

The input device of the present invention includes a resistor having a constant sheet resistance;
Two substrates each having a plurality of striped seniors that cross the resistor and are electrically connected to the resistor are arranged so that the striped seniors cross each other, for example, are almost perpendicular to each other. However, it is characterized in that the resistance in the longitudinal direction of each resistor is changed by making cuts in the longitudinal direction of each resistor.

[Effect]

The operation of the present invention will be explained in detail based on the drawings.

Figure 1 shows the basic structure of the invention.

In FIG. 1 (α), the resistance value of the resistor 1 is corrected by the cut 4. FIG. 1(b) shows the principle of correction.
The resistor 1 whose resistance value has been corrected by the cut 4 is shown in Fig. 1 (
6) is considered by dividing it into R5 to R7, and due to the cut 4, RxzR = 0. . This is done so that the value R@+=Ry. That is, the resistor 1 is divided into a plurality of blocks, and the resistance expansion value of each block is changed by changing the area of the blocks, thereby making the resistor 1 closer to a uniform resistor.

Next, one method of calculating the area ratio of each block will be explained. d1-dk-d shown in FIG. 2 is each block. A voltage vl is applied to the resistor 1, and the potential on the electric pot 2 is measured as shown in FIG. Therefore, each mttii rank (”
Let's m s,. -vLo, v3-, e”J
is found.

Next, the theoretical voltage drop VTR of each block is 7"-°゛-
"Completed, -□)°°°(1).The voltage drop vd(π-1) of each block is vd(z-1)==vx-1-vx # @ *(2
)"= (2s3i, J,, tt), and then calculate the difference +!!il- from the theoretical voltage drop VT)1.

v Cd(z-x) TH) = ud(, z-t)
-VTTl. , , (3) 'u Cd(
Z-1)-TH)'s biggest 7'o7ri'! r, the maximum resistance direct block, and in order to make the resistance values of other blocks the same as that of the maximum resistance value block, perform the following calculation. If the voltage drop of the maximum resistance block is vclmaz, then vd(x-1)/vdmaz = P (area ratio)
--(4), that is, the area of each block is
If it is made smaller by the proportion of P, the resistor 1 approaches a uniform resistor. Note that vmax may be set independently.

[Example 1] Figure 4 shows the patterning of P, gT (1881L) film on the upper substrate 3α, glass (1, 1T) on the lower substrate 3b, evaporator To on the senior minister 2, and patterning on the resistors 1α and 1b. Using a screen-printed carbon paste, cuts were made in the resistors lcL and 1b using a YAG laser to create a voltage detection type input device. Is there a spacer of several tens of microns between the upper substrate 3α and the lower substrate 3b? Seal adhesive was applied on all four sides. Board size is 100 m
x 150 wx, and the number of senior vassals was 12 x 8. The laser spot diameter was about 5μ. The resistance uniformity was significantly improved by this correction, and the difference between the measured potential and the theoretical potential when untreated was negligible. Also, considering the linearity error, 4.5% when 6-untreated was corrected to 0.8%. This result shows that in simple calculation, the limit number of keys due to linearity error is 1.
The input device of this example, which shows the increase from 1 to 62 dots, was made transparent, so the number of dots was 128 x 256.
DOT (D L CD Moshu-, +1. Upper fC
I installed it as a display/input device, and I was able to create a very accurate display/input device.

[Example 2] When the cuts in Example 1 were made using a cutter and the same correction was performed, the resistance uniformity was almost as good as that of the practical row 1, and the linearity error was 4.2 chi, but 1. I was able to get it to 0%.

[Example 3] Similar corrections were made by adding the incisions in the example work as shown in Figure 5 of the sail. In FIG. 5, the change in area is divided between both sides of the resistor.

-7-・ The results were the same as in Example 1, and were sufficiently corrected.

The input device of the present invention may be of a current detection type instead of a voltage detection type; the substrate may be transparent or opaque; the upper substrate may be made of plastic or glass; the lower substrate may be made of acrylic, etc. Plastic is also fine, but as a resistor, carbon sheet, metal plating, Denko T
It can also be realized as is, etc. The cuts can also be made by etching. Furthermore, the cut accuracy Fi
It was found in Examples 1 to 3 that fairly good results could be obtained without paying much attention.

〔Effect of the invention〕

As explained above, according to the present invention, the error in position detection caused by the linear non-uniformity of the resistance of the resistor is corrected, and position detection with a high degree of N is possible. Since it involves making cuts in the material, it can be easily done using a simple, low-cost automatic cutter, etc., without the need for high-precision, high-priced equipment such as a laser. Further, the correction method Vi of the present invention is very useful because the cut distance accuracy becomes easier in terms of errors, compared to other correction methods in which a cut is made in the lateral direction of the resistor 8 using a laser or the like. Furthermore, the manufacturing process of forming a resistor with a uniform resistance value on the substrate can be changed to the 1/'15 method by making cuts with a laser, cutter, etc. during the process, resulting in high performance. It has become easier to provide accurate input devices.

[Brief explanation of the drawings] Figure 1 (5) (b) is a detailed explanatory diagram of the present invention, etc. 2
Figure 3 is an explanatory diagram of the principle of the present invention, Figures 4 and 5 are detailed explanatory diagrams of the present invention, and Figures 6 (a) (6) and 7 are input diagrams of the present invention. An explanatory diagram of the device is shown. la, 1b: resistor 2: electrode 3α, 3b two substrates 4: more than the cut

Claims (1)

[Claims] a resistor having a constant sheet resistance, and a resistor intersecting the resistor;
and an input device including two substrates each having a plurality of striped electrodes electrically connected to the resistor, the striped electrodes intersecting each other and facing each other on the inside. An input device characterized in that resistance is corrected by providing a cut in the longitudinal direction of a resistor.