JPS5892028A - Information input device - Google Patents

Abstract

PURPOSE:To attain high-density contact points, with adoption of erroneons input information, by detecting the information actually inputted from the area or pressure of contact points turned on through depression out of a contact point matrix. CONSTITUTION:A comparison circuit 13 compares values converting contact resistance of X and Y conductors 10, 11 into a voltage or a current, and outputs them to a processor 14 such as CPU. That is, an area occupied with a contact point 12B depressed by a hand is represented by a number given to the X and Y conductors 10, 11, and this signal is compared with a signal proportional to an area occupied by a contact point 12A inputted actually, it is detected that the smaller signal is the actual input information and the larger information can not be adopted.

Description

[Detailed description of the invention] The present invention is an office automation system, computer system.

- A text and graphic input device for computers, word processors, Su (Japanese), etc., especially having a contact matrix, and inputting information by expressing the position of the turned-on contacts in the contact matrix with X and Y coordinates. This invention relates to improvements in information input devices.

Conventionally, this type of input device uses magnetism, light, etc.
, there are devices that input information by detecting position data expressed by Y coordinates, but these are all expensive, so as shown in FIG. 1, a contact matrix MS is provided and the contact matrix MS is The position of each contact S is represented by X and Y ridges, and the contact S at a predetermined position is pressed to turn on.
A low-cost contact point that inputs information based on its location information) I
A J-kus method is used.

In this contact matrix type input device, in order to increase the number of contacts S per fixed area and to obtain a predetermined pressing force, a suppressor such as a metal rod thinner than a human fingertip is used to press the predetermined contacts. It is necessary to press S carefully.

However, in reality, when pressing a contact S, one must place one's hand on another contact S and press a predetermined contact 8, as shown by dotted line A in Figure 1. There was a drawback that the contact S at the location would turn on, resulting in incorrect input. Therefore,
In order to prevent the above-mentioned erroneous input, we set a large pressure force to turn on the contacts S, and in order to prevent each contact S from turning on even if the surrounding area is pressed, holes are made in the areas corresponding to the contacts as shown in Figure 2. Reinforcement spacer with H open (made of rubber, etc.)
This prevents the contact S from turning on due to pressing force from sources other than the suppression pen. Figure 3 shows the conventional contact point map)
1 is a sectional view of an IJ box-shaped large input device, in which 1 is a surface-printed sheet, 2 is conductive rubber, 3 is a reinforcing spacer made of rubber or the like, 4 is a contact matrix, and 5 is a substrate.

1. Recently, there has been a demand for smaller devices and an increase in the amount of information, and the conventional contact matrix type input device is no longer applicable. In other words, in order to increase the density of the contacts in the contact matrix 4, it is necessary to narrow the hole pitch and reduce the hole diameter of the reinforcing spacer 6, but this has its limitations and is difficult to operate. sex,
There were problems such as poor reliability.

The present invention has been made to solve the above problem, and its feature is that the actual input is based on the area occupied by the contacts that are pressed and turned on in the contact matrix or the pressure with which the contacts are pressed. The reason is that a means for detecting that it is information is provided.

Hereinafter, the present invention will be described in detail along with examples.

FIG. 4 is a detailed explanatory diagram of the present invention, and 1
0 is the X conductor in the X-axis direction that constitutes the contact matrix, 11
is an X conductor in the Y-axis direction forming a contact matrix, and 12 is a contact point.

Numbers 0°1.2. are attached to the X and Y conductive wires 10.11, respectively.
Add 3n. and a predetermined contact point, e.g.
When inputting information by pressing contacts 12A of No. 12 of 0 and No. 16 of Yl#11 to turn them on, the contacts 12B that are turned on by being pressed by hand are within the area surrounded by dotted line A. The area occupied by the contact 12B pressed by this hand is X
It is represented by the numbers attached to 4II110 and Y4 line 11. That is, conductors No. 14 to 20 of the X conductor 10 are turned on to generate an output signal, and conductors No. 8 to 14 of the X conductor 11 are turned on to generate an output signal. This output signal generates a signal proportional to the area occupied by the on-contact 12B due to the suppression of the hand, etc., for example, a signal obtained by adding the output signals of the X4 wire 10, Y conductor, and SLL alone, or a signal whose area is calculated from both. , compare this signal with a signal proportional to the area occupied by the contact point 12A which is proportional to the actually input information, and detect that the smaller direction is the actual input information,
Avoid using the larger information.

In addition, there is an on-contact 12A that corresponds to information that is actually input, and an on-contact 1 that corresponds to erroneous input that is lightly pressed by a hand or the like.
If 2B and 2B have the same area, the two cannot be distinguished by the method described above, so we focused on the fact that the contact resistance of each contact is inversely proportional to the pressing pressure [7, ON contact 12A
, Detect the electrical resistance of X4 wire 10 and Y4 #11 corresponding to 12B as a voltage value or current value, and compare the two to detect the actually input information and avoid adopting incorrectly input information. .

FIG. 5 is a block diagram showing the configuration of an embodiment to which the pressure-based principle of the present invention is applied, and the same parts as in FIG. 4 are given the same symbols. In the figure, 13 is the X conductor 10
For example, a known tree-structure comparison circuit is used as a comparison circuit for comparing the values obtained by converting the contact resistances of the X conductors 11 into voltages or currents. 14 is C! P II
It is a processing device such as

Further, the embodiments to which the area-based principle of the present invention is applied are performed by creating a program based on the above-described principle.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and it goes without saying that the principle based on area and the principle based on pressure may be realized by themselves or by a combination of the two. .

As explained above, according to the present invention, information that is actually input is detected based on the area occupied by the contacts that are pressed and turned on in the contact matrix or the pressure with which the contacts are pressed, and the erroneous input is detected. Since information is not used, there is no need for high-precision and expensive spacers as in the past, and it is possible to increase the density of contacts, making the device more compact.
It is possible to increase the amount of information.

Also, in the field of graphic input, which has been attracting attention in recent years, input can be made by simply pressing and moving a metal bar or the like.

[Brief explanation of the drawing]

1 to 3 are diagrams for explaining the problems of the conventional contact matrix type input device, FIG. 4 is a diagram for explaining the present invention in detail, and FIG. 5 is a diagram for explaining the present invention in detail. FIG. 2 is a diagram showing, in a professional manner, the configuration of an embodiment to which the principle of pressure is applied. 10 X conductor 11 Y conductor 12 Contact 13 Comparator 14 Processing device MS Contact matrix agent
Patent Attorney Autumn 1) Collection Figure 1 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] In an information input device that has a contact matrix and inputs information based on the position of the contacts that are turned on in the contact matrix, the area occupied by the contacts that are pressed and turned on in the contact matrix or An information input device characterized by comprising means for detecting that information is actually input based on the pressure being applied.