JPS59189486A - Positional coordinate inputting device - Google Patents

Abstract

PURPOSE:To simplify the device, to shorten the scanning time and to improve the efficiency of inputting by executing wiring for driving and detection of conductor by a tablet plate and as a set of divided conductors. CONSTITUTION:Plural conductors 13, 14 are arranged parallelly at a specified pitch on the base body of the first and second tablet plates 11, 12, and a specified number of conductors are connected in common to divide said conductors into plural sets of conductors at electrode parts 15, 16 on the edges. The first and second tablet plates 11, 12 are laminated with a pressure-sensitive conductive sheet 17 in-between and with the direction of arrangement of conductors 13, 14 intersecting at right angles to form a tablet structure. When a coordinate position is indicated by pressing by using an indicator such as a pen, etc., the surface and back of the conductive sheet 17 at indicated position are short-circuited, and the conductors of tablet plates 11, 12 are short-circuited through the conductive sheet 17.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a position coordinate input device that has a simple configuration and is highly practical.

[Technical background of the invention and its problems]

Various positional coordinate input devices have been realized as input devices for character/graphic information. This type of device detects the positional coordinates on the tablet indicated by, for example, a pen, and can obtain information on the above-mentioned characters and figures from the locus of the positional coordinates.

FIG. 1 shows an example of a conventional position coordinate input device constructed using a pressure-sensitive conductive sheet.
X2-Xn + Yl + Yl to Ym'(i) each have a tablet structure arranged in parallel.

Therefore, the conducting wire X1+ arranged on the surface of the conductive sheet 1
A predetermined voltage is selectively applied to X2 to Xn via the switch group 2 from the power source 3, and all switch groups 4 are applied to the conducting wires Y1+Y2 to Ym arranged on the back side. A level detector 5 is connected thereto. The switch group 2 is sequentially and selectively turned on by a decoder 8 that decodes the count value of a counter 7 that counts the clock signal output from the clock generator 6. Further, the switch group 4 is selectively and repeatedly turned on by a decoder 10 that decodes the count value of the counter 9 that counts the carry output of the counter 7.

Each time a voltage is sequentially and selectively applied to the conductors X11X2 to Xn by these counters 7.9 and decoders 8, 10 over one period, the level detector 5 receives the conductors y,
+Y2 to Ym are sequentially and alternatively connected.

However, if the position of the tablet surface is pressed with a pen and the resistance value of the pressure-sensitive conductive sheet 1 at that position is locally lowered to short-circuit the conductor between the front and back surfaces, then The level detector 5 detects the voltage from the power supply 3 when the conductive wires Xl and Yj disposed in the power source 3 are selected by the switch groups 2 and 4, respectively. Therefore, the selection information of switch group 2.4 at this time,
By detecting the counts of the thumb counters 7 and 9, it is possible to read the coordinates of the indicated position on the tablet.

However, in the position configured as described above, it takes (nXm) switch controls to scan the entire tablet surface once. However, the above n and m are the conducting wires X1. X
The numbers are 2 to Xn, Yl, and Y2 to Yrn. For this reason, there was a problem in that the input speed of position coordinates could not be increased.

Moreover, each conductor Xlr Xx ~ XnF Yl # Y2
-Yn to the switch groups 2 and 4, respectively, requiring a large number of lead wires, and the scale of the device configuration has become considerably complicated. Such a problem becomes more noticeable as the detection position coordinates on the tablet surface are set more precisely, and is a problem in terms of practicality.

[Purpose of the invention]

The present invention has been made in consideration of these circumstances, and its purpose is to provide a position coordinate input device that has a simple configuration, good controllability, and excellent practicality.

[Summary of the invention]

The present invention provides two tablet boards in which a plurality of conductive wires are arranged in parallel and are divided into a plurality of groups by connecting a predetermined number of the plurality of conductive wires in common through electrode portions, and selecting the distance between the front and back surfaces. The conductive wires have a tablet structure in which the conductive wires are laminated in a crossing direction through means for short-circuiting the conductive wires, and the electrode portion has a tablet structure in which the conductive wires to which the adjacent conductive wires belong are mutually different from each other in the combination of conductive wires to which the adjacent conductive wires belong. A predetermined number of conductive wires are connected in common.

Then, a voltage is applied to the conductive wires of one tablet board, and one position coordinate component is detected by the combination of the conductive wire sets in which the voltage appears on the other tablet board, and then the conductive wires of the other tablet board are detected. A voltage is applied to the one tablet plate, and the position coordinate components of the other tablet plate are detected by the combination of the conductive wire sets on which the voltage appears on the one tablet plate.

〔Effect of the invention〕

Thus, according to the present invention, the wiring for driving or detecting the conductive wires of the tablet board is performed as a group of separated conductive wires, so the number of lead-out wires can be significantly reduced, and the scale of the device configuration can be reduced. The simplification of the diagram is obtained. Moreover, since the tablet surface is scanned as a set of conductive wires,
It is possible to reduce the time required to scan the entire area, speed up the input of position coordinates, and further improve the efficiency of the sword. Furthermore, since the position coordinate components are detected as a combination of the groups of conductive wires divided as described above, the detection process can be performed easily. Furthermore, since the direction of voltage transmission between the tablet plates is fixed, great practical effects such as high operational stability can be achieved.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 2 is a schematic configuration diagram of the embodiment device. The first and second tablet plates 11.12 have, for example, a plurality of conductive wires 13.14 arranged in parallel at a predetermined pitch on the base thereof, and electrode portions 15.16 provided at the ends thereof, respectively. It has a structure in which it is divided into a plurality of sets of conducting wires that are commonly connected at a predetermined rate. Therefore, these first and second tablet plates 11.12 are laminated with pressure-sensitive conductive sheets 1v* in between and with the directions of arrangement of the conductive wires 13.14 intersecting at right angles, forming a tablet structure. . The pressure-sensitive conductive sheet 17 reduces the resistance value of the pressed portion and locally shorts the front and back surfaces of the sheet. Conductive wire 13 between the first and second tablet plates 11 and 12.
14 are electrically short-circuited.

Therefore, each electrode portion 15. of the tablet plate 11.12.
A voltage source 19 and a level detector 20 are reciprocally connected to 16 via a switch circuit 18. Tsumushi, voltage source 1
9 is connected to the electrode section 15 of the first tablet board 11, the level detector 20 is connected to the electrode section 16 of the second tablet board 12, and conversely, the voltage source 19 is connected to the electrode section 15 of the first tablet board 11.
When connected to the electrode section 16 of the first tablet board 12, the level detector 20 is connected to the electrode section 15 of the first tablet board 11. The voltage source 19 applies a predetermined voltage to the conductor 13.14 of one tablet plate 11.12, and the level detector 20 detects the voltage generated on the other tablet plate 12.11. It detects divided sets of conducting wires 14,13.

By the way, the electrode portions 15.16 formed by dividing the conducting wires 13.14 into a plurality of groups are configured as shown in FIG. 3, for example. That is, here, 37 conductive wires 13 are shown arranged in parallel, and the number of conductors 13 is 12x+1.12x+3.12.
Three +5th to 12x+11th (x=0.1.2) conductive wires are commonly connected to each. Also 4x+
12y+2.4x+127+4 (x, y=0.1.2)
The th conductors are connected in common. and,
A set of conducting wires is formed for each of these commonly connected conducting wires. The conductive wires are divided into groups such that adjacent conductive wires belong to different combinations. And the above 12
x + 1, 12 x + 3 to 12 x + 6 sets A, B, and C, each having the 11th conducting wire in common.

D, E, and F roughly divide the conductor placement area into three equal parts, 4 x+ 12 y+ 2 p 4x+12y+
Six sets a are formed by connecting the fourth conductor in common.

b H(! 1 d r e r f, the above 3
The position within each equally divided area is determined. However, here, the arrangement pitch is determined so that an electrical short circuit occurs across two adjacent conductive wires by a pressing instruction using a pen or the like on a tablet having the above-described structure.

Thus, in this apparatus having such a configuration, when a coordinate position is suppressed and indicated using an indicator such as a pen, the front and back surfaces of the conductive sheet 17 at the indicated position are short-circuited. As a result, the conductive wires of the tablet plate 11, 12 are short-circuited through the conductive sheet 17 in a small area defined by two adjacent wires, as shown by the broken line area 21 in FIG.

However, if a predetermined voltage is applied to the conductor 13 of the tablet board 11, the voltage will be applied to the selected product through the short-circuit position to the conductor 14 of the tablet board 12, and only to the two adjacent conductors. communicated. Since the combination of groups to which the two conductive wires to which this voltage is transmitted differs depending on the indicated position on the tablet surface, the level detector 2'0 detects whether or not voltage is occurring in the pair of conductive wires. If detected, the indicated position can be determined from the combination of conductive wire sets where voltage is generated.

However, this pointing position detection is performed only in one direction of the tablet surface. Therefore, this time, a voltage is applied to the conductive wires 14 on the tablet board 12 side, and the combination of conductive wires in which a voltage is generated on the tablet board 11 side is detected.

As a result, the position of the tablet surface in the other direction is detected, and together with the detected position, it becomes possible to obtain the coordinates of the indicated position on the tablet surface.

As described above, with this device, the coordinates of the indicated position can be detected and input easily. Moreover, the conducting wire 13.
Since the wiring for 14 can be performed as a set of conducting wires connected in common at a predetermined ratio via the electrode parts 15 and 16, the number of wires can be significantly reduced, and the device configuration can be simplified. . Furthermore, as mentioned above, since the voltage application and the detection of the set of conductive wires that generate the voltage can be performed in parallel, the position coordinates can be detected efficiently in a short time, and the input speed can be improved. . It should be noted that if such control execution is performed using a microprocessor, it will be very simple and have great practical advantages. Further, since the direction of voltage transmission is controlled to be constant, great practical effects such as excellent operational stability can be achieved.

Note that the invention is not limited to the above embodiments. For example, the width, pitch, and number of conducting wires may be set according to specifications.

Alternatively, a decoder may be provided in the level detector and the decoder output may be obtained. Alternatively, even faster detection processing is possible.

In short, the present invention can be implemented with various modifications without departing from the gist thereof.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an example of a conventional device, FIG. 2 is a schematic diagram of a device according to an embodiment of the present invention, and FIG. 3 is a diagram showing a configuration of an electrode section according to the embodiment. '11.12...Tablet board, 13.14...Conducting wire, 15.16...Electrode part,
DESCRIPTION OF SYMBOLS 12... Pressure-sensitive conductive sheet, 18... Switch circuit, 19... Voltage source, 20... Level detector. Applicant's agent Patent attorney Takehiko Suzue Figure 1 Figure 3 = 469

Claims (3)

[Claims] (1) Two tablet boards each having a plurality of conductive wires arranged in parallel and divided into a plurality of groups by connecting a predetermined number of the plurality of conductive wires in common through electrode portions, and these tablets. means for stacking the plates in a direction in which the conductive wires intersect, and selectively short-circuiting the conductive wires between the tablet plates at designated positions;
Means for applying a voltage to conductive wires arranged on the one tablet board, and means for detecting a set of divided conductive wires on the other tablet board through which the applied voltage is output through the short-circuited conductive wires. The electrode section provided on each of the tablet plates has a plurality of conductive wires arranged in a predetermined number by differentiating the combinations of the conductive wire groups to which the adjacent conductive wires belong, respectively, to each adjacent conductor open case. 1. A position coordinate input device characterized by being divided into a plurality of groups in common. (2) The means for selectively shorting the conductive wire between the tablets consists of a pressure conductor that is interposed between the two tablets and reduces the resistance value of the pressure area to locally short-circuit the two surfaces. A position coordinate input device according to claim 1. (3) The position coordinate input device according to claim 1, wherein the means for applying a voltage and the means for detecting a set of conductive wires where voltage is generated are connected to one tablet board and the other tablet board reciprocally. .