JPS63136214A - Coordinate input device - Google Patents

Abstract

PURPOSE:To reduce the load of a computer main body and also to omit the individual production of programs by using a coordinate axis setting means and a coordinate information generating means in addition to a position indicating means which indicates a desired position on a coordinate input board. CONSTITUTION:A coordinate input board 1 contains coordinate detecting electrode wires formed toward coordinate axes Xd and Yd respectively with fixed spaces. The edges 13 and 15 opposite to two sides 9 and 11 of a rectangular scale 7 forming a right angle show the new coordinate axes Xc and Yc which are set by the rule 7 serving as a coordinate setting means. Then, an intersecting point Sc is defined as the original point of a new coordinate system. When the tip 5 of an input pen 3 has a contact with a desired point, a CPU 43 connects a selection circuit 33 to a fixed detecting element 17 on a coordinate axis Yc and impressed the scan pulses the electrode wires set in both axes Xd and Yd. Then, the coordinate information on a point set at a lower end 21 is obtained by making use of the ratio of levels among those pulses induced at the end 21 of the element 17 together with the coordinate information on the tip 5. Based on these coordinate information, the component elements of the coordinate axis of a desired point can be calculated.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a coordinate input device, and more particularly to a coordinate input device that can arbitrarily change coordinate axes that serve as a reference for input coordinate information.

``Prior Art'' When handling drawing coordinate information etc. on a computer, it is better to handle it in large blocks, for example, blocks of a size smaller than the entire large-scale drawing.

In general, it is better to use small blocks, for example, blocks of a size such that each of the large-scale drawings is separate, so that the device can be made smaller and processing is easier. However, in the drawings that we deal with on a daily basis, related items (for example, large-scale drawings) are often drawn entirely on a single sheet of paper. In such cases, it is necessary to obtain coordinate information for each figure from this single sheet of paper, that is, coordinate information based on the center line of each figure and the coordinate axes of that figure, but conventionally in such cases In this system, the coordinates of each point were entered as a single figure, such as a six-sided figure, written on a single sheet of paper, and then the program was used to break it down into coordinate information for each figure.

``Problems to be Solved by the Invention'' For this reason, it was necessary to create a processing program depending on the content of each work and each device (computer main body, coordinate input device).

"Means for Solving the Problem" Therefore, in the present invention, in addition to a position indicating means for indicating a desired position on the coordinate input panel, a coordinate axis setting means for setting a desired coordinate axis on the coordinate input panel. The above-mentioned problem is solved by providing coordinate information generating means for generating coordinate information of the indicated position indicated by the position indicating means with reference to the coordinate axes set by the coordinate axis setting means.

"Operation" That is, in the present invention, the coordinate information of the position indicating means that is detected with reference to the original coordinate axes of the coordinate input panel is converted into coordinate information based on the coordinate axes set by the operator at any time by the coordinate axis setting means. and send it to a computer, etc.

[Example-] The details of the present invention will be explained below based on the illustrated embodiment. FIG. 1 shows the external appearance of the device. In the figure, 1 is the coordinate input board.
Made by injection molding synthetic resin material. A synthetic resin base film (not shown) is placed inside the coordinate input panel 1, and coordinate detection electrode lines (not shown) are formed on this at regular intervals in each of the Xd and Yd directions. . Reference numeral 3 denotes an input pen which is a position indicating means, and it is based on the thickness and timing of the electrostatic conduction pulse generated at the detection tip 5 of the input pen 3 when a scanning pulse is applied to the coordinate detection electrode wire mentioned above. ,
The contact position of the detection tip 50 is determined.

Reference numeral 7 denotes a right angle ruler serving as a coordinate axis setting means, which is formed by molding a synthetic resin material into a right angle L shape with a predetermined thickness and width. Represents new coordinate axes Xc and Yc set with ruler 7,
The intersection Sc of the edges 13 and 15 becomes the origin of the new coordinate system.

17.19 is a fixed detection element, which is made by cutting the lower part of a short metal cylinder with a small diameter into a conical shape, as shown enlarged in 1 circle C.
7, its lower end 21 is on the coordinate axis Yc (on the extension of the edge 15)
to be located in.

Further, 19 is embedded in the right angle ruler 7 such that its tip 23 is located above a straight line Xr extending from the tip 21 in parallel to the coordinate axis Xc. Note that 25 and 27 are embedded signal lines for deriving detection signals from these fixed detection elements 17 and 19, respectively.

29 is a flexible electric wire connected to these.

Figure 2 shows the block configuration. In each figure below,
Parts that have already been explained will be designated by the same reference numerals and the explanation will be omitted. In the figure, reference numeral 31 denotes a pen switch, which is linked to the movement of the detection tip 5, which slides toward the inside of the pen shaft when it comes into contact with the coordinate input panel 1.

36 is a selection circuit which selects either the fixed detection element 17, 19 or the signal induced in the detection tip 5 and supplies it to the amplifier 35. In the following explanation, the selection circuit will be referred to as "5ELJ" and the amplifier will be referred to as "AMPJ".

For other parts, if an abbreviation is given in parentheses after the name, that abbreviation will be used from now on.

37 is an analog-to-digital converter (A/D).

Convert the output of AMP35 into a digital value. 69 is a decoder driver, based on the supplied address signal, Xd,
A scanning pulse is applied to the electrode lines in each direction of Yd. Reference numeral 41 denotes an input/output capo (Ilo) for exchanging data between the central processing unit (CPU) 43 and each processor and a computer (not shown).

The CPU 43 is a so-called microcomputer made into an integrated circuit, and operates according to a program stored in a read-only memory (ROM) 45.

A random access memory (RAM) 4y is used to execute the processing described below.

Examples of the positional relationship between the coordinate input panel 1 and the square ruler 7 are shown in FIGS. 6 and 4. Figure 3 shows the coordinate axes Xd and Yd of the coordinate input board 1.
The twist of the coordinate axis X c + Y c of the square ruler 7 relative to the figure is clockwise, and in FIG. 4 it is counterclockwise. In these figures, Sd is the coordinate origin of the coordinate input board 1, Sc is the coordinate origin 1 point po of the square ruler 7, P is the position of the lower end 21.23 of the fixed detection element 17.19, #i
As mentioned above, point PO is on the coordinate axis Yc of the square ruler 7, and point P1 is on the straight line Xt drawn from point PO parallel to the coordinate axis Xc.
, respectively. Point P2 is the contact point of the detection tip 50 of the input pen 3, and point P3 is the foot of a perpendicular line drawn from this point P2 onto straight line XL.Two points P4 are the legs of a perpendicular line drawn from point P2 on the Yc thin axis.

Point P5 is the foot of the perpendicular line drawn from point P1 on the Xs thin axis.

Point P6 is the foot of a perpendicular line drawn from point P2 on the same <Xs thin axis.Point P7 is the foot of a perpendicular line drawn from point P2 on the Y8 axis. Note that the Ys axis is drawn parallel to the coordinate axis Yd from the point PO.

The purpose here is the detection information of an arbitrary input point P2,
That is, the original coordinate information Xd2. is based on the coordinate axes Xd and Yd of the coordinate input panel 1. Yd2 is the coordinate axis Xc of the square ruler 7,
Coordinate information Xt, 5 (XL acid component of point P3, Y
c4 (to convert to the Yc acid component of point P4. Therefore, the coordinate information of point P2 can be directly detected using the coordinate input panel 1.
(Two-person input point.

Position of detection tip 5 of Ben 3) 1 point Po (position of lower end 21 of fixed detection element 17) 2 points P1 (fixed detection element 1
90 lower end 23), and Xt of point P5 using the positional relationship of each of the above points P5 to P7 and Sc whose position can be further specified from these points.

The coordinate component XL3 and the Yc acid component c4 of the point P4 are determined. In order to facilitate understanding, the components XL3 and Yc are required.
4 is underlined, and the coordinate components of each point are shown in parentheses.

That is, first, the XL coordinate axis component X of the point P3 found in FIG.
LI is.

Xt, 3==Po P2 * cos (e1+82)
, and this formula is Xt, 3=PHI P2(cose4・coae2-s
inθ1″sinθ2) POP2cosθ1=PQ P6.PoP2 s i
n e+=P2P6, and pcOBθ2. sin
The value of θ2 can be replaced with the line segment ratios of the triangles po P and P5 that can be specified from the coordinate information of the point P OI P 1, so if we substitute these values and organize the equation.

XLs=(PoP6・PoPs−P2P6・PlPs)
/PoP1・1 song (1).

Similarly, the Ye coordinate axis component Yc4 of the other point P4 is.

Yc 4=P□ P2 sin (θ1+02)−Yc
.

Expressed as , and expanded similarly.

Y c 4= (P2 P6 ・P(I P5+ PO
P6'P1P5)/POPl-Yco-(2). Note that Yco is the distance between the coordinate origin Sc of the square ruler 7 and the position P1 of the lower end 21 of the fixed detection element 17.

Similarly, in FIG. 4, the Xt of the point P5 to be sought and the coordinate axis component XL3 are.

It is expressed as XL3=POP2 s in (θ1+02), and this formula is XL3=POP2 (sine1cosθ2+cose
1sino2) becomes □P(IP2sjno+=P2
Py, Pa P2 cose+==po P7, and cos θ2. Since Sinθ2 can also be replaced by the line segment ratio, let's substitute these and organize the equation.

XL5=(P2P7・PoPs+PoP7′JP+Ps
)/PaP1 °°゛1°゛° (3).

Similarly, the Yc coordinate component Yc4 of point P4 is found as follows.

Yc4=PoP2 cos (e4 +82)
-Yc.

It is expressed as , and can be arranged using the same procedure.

Y c 4=(POP7 ・PoPs −P2 Py
・P+ Ps )/Pa P+ -YO2-...(4)
becomes.

Note that the positional relationship between the square ruler 7 and the coordinate input panel 1 may be other than the states shown in FIGS. 3 and 4, but it is sufficient to assume these states for practical purposes. (If necessary, it can be similarly determined from the known points PO and P1/P2 p S d.

) The operation of this device will be explained with reference to FIG.

First, when a power switch (not shown) is turned on, the CPU 43 proceeds to step S1 and performs initial settings such as r104i. Next, the process proceeds to step S2, and the opening and closing of the pen switch 51 is monitored. Enter here:.

The detection tip 5 of the pen 3 is brought into contact with the desired point P2 as described above. Yo, Shia57. ．． If it is "I" or "I", it becomes "close, j", and the CPU 43 proceeds to step S3.

Here, the CPU 43 connects the 5EL 33 to the fixed detection element 17, supplies a series of address signals to the decoder driver 39, and applies scanning pulses to electrode lines in each of the Xd and Yd directions (not shown). For the hard jp system, see, for example, Japanese Patent Publication No. 53-19380. ) Here, the CPU45 is further increased to 5
The EL 36 is switched and connected to the fixed detection element 19 and the detection tip 5 of the input pen 3.

Similarly, the coordinate information (X d
1°yct + ), (Xd2.Yd2) is obtained.

Next, the CPU 43 proceeds to step S4, and calculates the line segment Pa p5. based on the above coordinate information. Calculate the lengths of PI P5 and POPI in advance. Then, the process advances to step S5 and reaches point P.

Ru. Therefore, the process advances to step S6 and the line segment po P6・P2P
Calculate the length of
5. Calculate Yc4. Then, the process advances to step S8, and this value is sent to the converter main body (not shown), etc.

When Y d 1>Y do, the state is shown in FIG. 4.

In this case, the process advances from step S5 to step S9 and the line segment P2P7. Calculate the length of PoP7, step S10
Based on that value and the value calculated earlier, formula (3), (4
) to calculate X43 and Yc5, and follow the steps mentioned above.

Proceed to step S9.

"Other Embodiments" The coordinate axis setting means may have other shapes, such as a straight edge.

The fixed detection elements 17 and 19 are used to detect the attitude of the square ruler 7, and their positions can be set arbitrarily.

The coordinate detection method may also be arbitrary, such as an electromagnetic coupling method, a surface acoustic wave method, etc.
The shape and structure of can also change.

"Effects of the Invention" The present invention adopts a ridge-like configuration. Therefore, simply by moving the rectangular ruler serving as the coordinate axis setting means, new coordinate axes are set at that position, and coordinate information based on the coordinate axes is sent to the main unit of the computer. This reduces the burden on the computer itself and eliminates the need to create separate programs. Additionally, by connecting the coordinate input device of the present invention, coordinate axes conversion can be performed using the current program.

become.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, with Fig. 1 being a perspective view, Fig. 2 being a block diagram efEs, Fig. 4 being a line diagram showing the positional relationship between a square ruler and a coordinate input panel, and Fig. 5 being a processing diagram. It is a diagram showing a procedure. １・・・・・・・・・Coordinate input board, ３・・・・・・・・・
- Input pen. 7...Coordinate axis setting means, 45, 45.4
7...Coordinate information generation means.

Claims (1)

[Claims] a coordinate input board; a position indicating means for indicating a desired position on the coordinate input board; a coordinate axis setting means for setting a desired coordinate axis on the coordinate input board; and a coordinate axis set by the coordinate axis setting means as a reference. 1. A coordinate input device comprising: coordinate information generation means for generating coordinate information of a designated position designated by the position designation means.