JPH074668Y2 - Figure input device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a graphic input device,
In particular, it relates to a figure input device using a so-called mouse type cursor.

[0002]

2. Description of the Related Art Generally, a graphic input device for inputting handwritten characters and graphics has been researched and developed in various fields in response to recent social demands in the information age. As this figure input device, there are various types such as an ultrasonic type or an optical type. In recent years, a plurality of X and Y electrodes are arranged in a matrix form, and a scanning pulse is sequentially applied to the X and Y electrodes. Attention has been paid to a tablet type in which the coordinate position is specified by an input pen or a cursor.

FIG . 8 is an external perspective view showing a usage state of the electrostatically coupled tablet input device having a cursor for the graphic input device. In FIG. 8 , a tablet input device 101 includes a tablet 1 as an input panel on an inclined upper surface.
02 and the body 104 having a keyboard 103, a cursor 106 for coordinate pointing connected by cable 105 to the body 104, made from the leg 107 which supports the main body 104, placing the cursor 106 on the tablet 102 drawings Slide the cross mark 111 (Fig.
Performs coordinate reading by matching location reference) to a line of the graphic, whereas, for operation stop and mode switching換等apparatus has a configuration for performing key operation on the keyboard 103.

[0004]

An invention is the way, graphical input cursor 106 in the prior art, consists of a magnifying glass-like reading portion 113 and a rectangular box shape of the grip portion 114. As shown in FIGS. 9 to 10 . Of these, the reading unit 1
13 projects from the housing 115 of the grip 114 to the left in FIG.
The annular frame 116 provided and the peripheral portion of the annular frame 116 are closely packed.
The window portion 108 is fixed and fixed .
In such a conventional example, the window 108 is made of a glass plate or a similar transparent material, and the transparent electrode 109 is formed at the center.
And the lead wire 1 on the transparent electrode 109.
Since a complicated structure in which 10 is connected and drawn out to the printed circuit board 112 is required, there is an inconvenience that the manufacturing yield is low, and since the lead wire 110 is a bare wire, noise and the like are easily mixed, and therefore, There is an inconvenience that the device easily malfunctions.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above prior art, and has a simple structure and is capable of detecting an accurate coordinate position.
Both , speeding up of signal processing and malfunction in specifying
It is an object of the present invention to provide a graphic input device with a reduced number of works .

[0006]

In the present invention, a plurality of X-cells are used.
A capacitively coupled information input panel such as a tablet in which poles and Y electrodes are arranged in a matrix, and a cursor for identifying input coordinates used by being mounted on the capacitively coupled information input panel in graphical input device including bets, the cursor as described above, comprising an alignment unit for aligning Fig or line or the like to be input, and a grip portion having a substrate having a predetermined circuit is incorporated therein The configuration. The alignment part
A window provided in the center and an annular frame surrounding the window
Is provided. And on the circular frame, is it an information input board?
Two signals that detect a predetermined coordinate signal from the
Equipped with a signal detector, and these two signal detectors,
Through the window section described above, and with the alignment section described above
One side and the other side with respect to the common central axis of the
It is divided into two parts and arranged. This aims to achieve the above-mentioned object.

[0007]

DETAILED DESCRIPTION OF THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. Here, the same components as those of the above-described conventional technique are designated by the same reference numerals.

[0008] First, for each basic structure of a mouse-like cursor which forms the background of the present invention will be described with reference to FIGS. 2 to 3. The cursor 22 shown in FIG. 2 has a magnifying glass-shaped alignment unit 13 and a box-shaped reading unit 14 which are integrated. The alignment portion 13 is provided with a circular transparent window portion 8 having a cross mark 111 in the center. Further, the annular frame 1 projects from the housing 15 of the reading unit 14 to the left in FIG.
6 is provided, and the annular frame 16 is the peripheral edge of the window portion 8 described above.
It is fixed in close contact with the part . On the other hand, the reading unit 14 is equipped with detection electrodes 17 and 18 as signal detection units that are electrostatically coupled to the scanning electrodes of the tablet on the printed circuit board 12. The tips of the detection electrodes 17 and 18 are inserted into the perforated portion 19 (see FIG. 3) of the housing 15, and the inner wall surface of the housing 15 has a shield 2 as shown in FIG.
0 is given. Therefore, the detection electrodes 17 and 18 can accurately detect signals without being affected by noise or the like.

Here, in the above embodiment, the alignment section
When the alignment of 13 on the tablet board surface described above is performed, the detection electrodes 17 and 18 each detect a predetermined coordinate signal, so that the coordinate in which the alignment is performed can be obtained as follows. .

Now , from the center of the alignment portion to the detection electrodes 17,
The length up to 18 is L (constant), the angle sandwiching the detection electrodes 17 and 18 is α (constant), and the center of alignment is P ₀ (X ₀ , y ₀ ) as shown in FIG. Is the coordinate position of P ₁ (x ₁ , y ₁ ), and the coordinate position of the detection electrode 18 is P 1.
₂ (x ₂ , y ₂ ), such that the angle of the line segment between P ₀ P ₁ with respect to the X axis is φ, and the angle of the line segment between P ₁ P ₂ with respect to the X axis is θ. It was done on the tablet board
It In this case, the relationship between the coordinates of _{P 0 (x 0, y 0} ) and P ₁ of the coordinates _(x 1, _{y 1)} is

X ₀ = x ₁ + L _cos φ

Y ₀ = y ₁ + L _cos φ

[0013] The relationship between P ₁ of the coordinates _(x 1, _{y 1)} and P ₂ of the coordinate _(x 2, _{y 2)} is,

[0014]

[Equation 1]

The relationship between φ and θ is

Φ = θ−α ...

From this,

[0018]

[Equation 2]

The center of the alignment portion is called.

Next, a specific embodiment of the present invention will be described with reference to FIG . The embodiment shown in FIG. 1 has been described above.
The detection electrodes 17 and 18 disclosed in the background art of FIG. 2 are provided in the annular frame portions located on both sides of the center point of the alignment portion 13 ,
Position by placing separately on either side as shown in FIG. 1
The location registration unit 13,, structure the cursor 23 have this
The feature is that it is made. Other configurations are described above
It is almost the same as the basic configuration of FIG . That is, two
The detection electrodes 17 and 18 which are signal detection parts are aligned with each other.
Through the window 8 to the annular frame part which is the frame part of 13, and
Based on the common central axis of the alignment part 13 and the grip part
Equivalent to one side and the other side
It Therefore, the detection electrodes 17 and 18 have their signal detection surfaces
Except next and this external exposure disappears, Therefore, the
Significantly reduces the proportion of noise mixed in the two signal detectors
It is possible to effectively suppress malfunctions during signal processing.
It is possible to control. Here shown in this Figure 1
Using the cursor 23 as described above,
Let's find the position P ₀ . Now, set the detection electrode 17 to P
₁ (x ₁ , y ₁ ), the detection electrode 18 is P ₂ (x ₂ , y ₂ ).
And the alignment center is P ₀ (x ₀ , y ₀ ),
When this P ₀ (x ₀ , y ₀ ) is calculated,

[0021]

[Equation 3]

Is required. Therefore, in the embodiment shown in FIG. 1 , the calculation formula is simpler than that described above, and the processing capacity can be greatly improved.

That is, as described above, the alignment section 13
As shown in FIG. 1, the detection electrodes 17 and 18 are attached to the annular frame portion of
As a result of being equipped,
Since the distance between the detection electrodes 17 and 18 is the same,
Signal processing of signals detected by the detection electrodes 17 and 18 accordingly
Can be simplified and speeded up, and at the same
Since it is purified, it is possible to perform signal processing with higher accuracy.
It is possible . It will now be described with reference to FIGS. 5-6 an electrical configuration to detect a coordinate signal from the detection electrodes 17, 18.

In FIG . 5 , reference numeral 2 is an X electrode group X _{1 to} X.
_n, it is a tablet Y electrode group _X 1 to Y _n are arranged. When the cursor 23 is brought into contact with or slid on the tablet 102 , the switch 24 is closed and the counter 26 operates by the action of the control circuit 25, and the count value of the counter is passed through the gate 27 to the electrode drive circuits 28 and 29. To the electrode drive circuits 28 and 29, the count value sent from the counter 26 is sign-converted, and a scanning pulse is applied to each X and Y electrode line. At this time, the cursor 23 detects the scanning pulse by capacitive coupling with the tablet and sends the output signal to the amplifiers 30 and 31.

Since the cursor 23 is equipped with the two detection electrodes 17 and 18, it is necessary to detect the coordinate signal from each electrode. Therefore, first, a switching signal is sent to the switching circuit 32 to detect the contact position of the one detection electrode 17, and the signal from the amplifier 30 is detected, and then the switching circuit 32 is switched to the amplifier 31 side. The signal from 31 is detected. On the other hand, in order to specify the coordinates detected at this time, it is necessary to select the storage circuits 33 and 34. Therefore, the switching signal is also sent to the gate 35 side, the gate 35 is switched in synchronization with the switching of the amplifier, the coordinates of the contact position of the detection electrode 17 are stored in the memory circuit 33, and the detection electrode 18 is contacted. The coordinates of the position are stored in the storage circuit 34, respectively.

The signal output from the amplifier 31 is input to one terminal of the comparator 36. A predetermined threshold voltage set by the semi-fixed resistor R is set to the other terminal of the comparator 36, and the comparator 36 has a function of passing only a detection signal above the threshold level. There is.

The output signal from the comparator 36 is sent to the latch circuit 38 and the control circuit 25 via the shaping circuit 37. Upon receiving the detection signal, the latch circuit 38 latches the count value of the counter 26 at the reception timing. This count value represents the position of the electrode to which the scanning pulse is applied. Then, the latched count value is sent to the side of the memory circuit 33 where the gate 35 is switched.

On the other hand, when the detection signal is received from the shaping circuit 37 in the control circuit 25, the counter 26 is operated again to detect the contact position of the other detection electrode 18, and the switching circuit 32 is moved to the amplifier 31 side and the gate 35. To the memory circuit 34 side. This causes the coordinates of the contact position of the detection electrode 18 to be sent to the memory circuit 34.

[0029] The gate 35 is constituted by a tri-state bus' file as shown in Figure 6. Here, FIG. 6 corresponds to FIG.
FIG. 3 is an electrical block diagram of a circuit that mainly performs switching operation, which is simplified and partially omitted. The switching operation will be described with reference to FIG. 6. First, the control circuit 25 sends a "low signal" to the switching circuit 32 and the gate 35. Upon receiving this signal, the switching circuit 32 side switches the switch to the amplifier 30 side. On the other hand, when a signal is received on the gate 35 side, the “low signal” changes to a “high signal” via the inverter 40,
Since the tri-state buffer 39 is enabled and the tri-state buffer 41 is disabled, the signal line is switched to the storage circuit 33 side. On the other hand, when the "high signal" is sent from the control circuit 25, the switching circuit 32 is switched to the amplifier 31 side and the gate 3
5, the tri-state buffer 41 is in the valid state,
Since the tri-state buffer 39 is disabled, it is switched to the storage circuit 34 side.

After the coordinate values of the detection electrodes 17 and 18 in contact with each other are detected, on the main body side 42, the alignment point of the cursor 22 is calculated by the formula, or the alignment point of the cursor 23 is calculated by the formula. Can be calculated and CRT display can be performed.

FIG . 7 shows an example of the usage status of the cursor according to the present embodiment . Reference numeral 50 indicates a base paper on which figures and the like are described, and reference numeral 102 indicates a tablet. In this case, when placing the base paper 50 on the tablet 102 , when the distance between the electrodes 17 and 18 is set to 2 L, the base paper 50 and the tablet 10 are set so that “L ₀ > L”.
It is advisable to determine each size of 2 . However, _{L 0} denotes the width of the tablet 102 portion formed on the periphery of the base paper 50 when placing the stencil sheet 50 onto the tablet <br/> DOO 102. In this way, ※ marking section shown in FIG. 7, i.e., put in the drawing
The coordinates of the lower left B area or the upper left A area in the figure
Information can also be entered effectively .

[0032]

[Effect of the Invention] The present invention is constructed and functions as described above.
So, according to this, align the two signal detectors,
Since it is equipped on the ring frame part of the
Since there is no external exposure of the two signal detectors,
The ratio of noise mixed in the two signal detectors is significantly reduced.
It is possible to reduce the malfunction due to signal processing.
The ring frame of the alignment part can effectively suppress the work
Since the part is equipped with an electrostatic signal detector,
There is no need for a special device for electrical shielding, so
The entire configuration, including the lines, can be significantly simplified,
Therefore, the entire device can be obtained relatively inexpensively, and further,
As mentioned above, in the annular frame part of the alignment part, and
Based on the common center axis of the alignment part and the grip part,
One side and the other side are equipped with a signal detector, so
No matter how you set up one signal detector,
The distance between them is constant, and at the same time the center of the alignment part
Unit and each signal detection unit are set to the same distance.
Signal processing of the position information detected by each signal detection unit
It is possible to provide a graphic input device having an unprecedented practicability, which is capable of executing quickly and highly accurately .

[Brief description of drawings]

FIG. 1 is a schematic view showing a cursor according to an embodiment of the present invention.
It is a top view .

FIG. 2 shows an example of a cursor forming the technical background of the present invention .
FIG .

3 is a partial cross-sectional view taken along the line IV-IV of FIG.
It

FIG. 4 is an explanatory diagram for determining the center of the alignment unit.
It

FIG. 5 is a diagram for processing the signal detected by the cursor in FIG .
It is an electrical block diagram showing an example in the case of.

6 is an electrical block diagram of a circuit obtained by simplifying FIG.
It

FIG. 7 is an explanatory diagram showing a usage example of the cursor shown in FIG.
It

FIG. 8 shows a general electrostatically coupled tablet input device.
FIG .

9 is a plan view showing the cursor in FIG . 8. FIG .

FIG. 10 is a front view of FIG . 9 .

[Explanation of reference numerals] 8 window portion 16 annular frame 13 , 13 'alignment portion 17, 18 detection electrodes 22 and 23 as signal detection portion cursors 12 and 21 printed circuit board 102 as substrate tablets x _{1 to} X _n X electrodes Group x ₁ to Y _n Y electrode group

Claims (1)

[Scope of utility model registration request] 1. An electrostatically coupled information input panel such as a tablet in which a plurality of X electrodes and Y electrodes are arranged in a matrix, and is used by being placed on this electrostatically coupled information input panel. in graphical input device and a cursor for inputting coordinate specification which is provided with the cursor, and the positioning unit for aligning Fig or line or the like to be input, and a grip portion having a predetermined board inside And the above-mentioned position
The mating part, the window part provided in the central part and the window part concerned
And a ring frame surrounding the ring frame.
A predetermined coordinate signal from the information input board is electrostatically coupled to the frame.
Thus equipped the two signal detection unit for detecting, of the two
The signal detection unit through the window and the alignment
With one side, based on the common central axis of the grip and the grip
A graphic input device characterized by being arranged separately on the other side .