JPS61217821A - X-y coordinate input device - Google Patents

Abstract

PURPOSE:To improve the operability of an X-Y coordinate input device by using an acceleration meter set in a housing to convert the displacement of said input device produced on an x-y plane into an X-Y plane on a CRT. CONSTITUTION:When an X-Y coordinate input device is moved on an x-y plane, the (x) and (y) components of acceleration of the shift are applied to two acceleration meters 2 and 3 set at the tip part of the input device. Then the voltage corresponding to the level of acceleration is obtained in the form of signals. For instance, the signal voltage of the (x) component is converted into the number of pulses proportional to the level of voltage by a voltage-frequency converter 14 and sent to a computer. The number of these pulses are counted to obtain the shift amount of the input device in the direction (x). In the same way, the signal voltage of the (y) component is also converted into the number of pulses. Then the shift amount of the input device is obtained in the direction (y). The computer uses these data to display a cursor on a CRT in response to the shift of the input device on the x-y plane.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention is small in size, has excellent operability, and has excellent durability.
(Prior art) Conventionally, as a means for instructing the pointing point of a CRT display used as a computer terminal, a @joystick as shown in Fig. 4 is an example. , ■Trackball, ■Digitizer, ■Touch panel, ■Mouse, ■Light pen, etc. have been used.

(# 1986-108914 > (Problem to be solved by the invention) The joystick shown in Fig. 4 @ indicates the direction of movement of the pointing point by the angle of the operating rod 1. It required considerable skill to operate the operating rod 21 in order to move and stop the operation rod 21.The trackball shown in FIG.
30 The surface must be made of a material suitable for friction and be highly sensitive1
．． Naturally, the ball 23 itself has become expensive.

Furthermore, the mouse shown in FIG. 4 (■) has the disadvantage that if the surface on which the ball 23 is rolled is too smooth, it will spin idly and dust and dirt on the desk will be drawn in, leading to malfunctions.

The digitizer shown in FIG. 4 (■) and the touch panel shown in FIG. 4 (■) require a dedicated board 24, which requires space on the desk.

The light pen shown in Figure 4 (■) has the disadvantage that it makes the eyes and arms tired because the light pen is placed on the CRT to indicate the position.

(Means for Solving the Problems) The present invention solves the above-mentioned drawbacks, and uses an accelerometer built in the housing to measure the displacement of the X-Y coordinate input device on the x-y plane on the CRT. By converting it to a flat surface, we improved operability and durability.

(Example) The invention will be explained in detail below according to an illustrated embodiment.

FIG. 1(a) is a sectional view showing an embodiment according to the present invention, and FIG. 1(b) is a general view showing an embodiment according to the present invention. 1 is a function button for selecting functions and information, 2 is an accelerometer that detects acceleration in the X direction, and 3 is an accelerometer that detects acceleration in the X direction.
is an accelerometer that detects acceleration in the X direction. Although there are various types of accelerometers in the past, FIG. 2 shows an example in which a strain gauge and a pressure element are used as the acceleration sensor element 15.

Figure 2 (a) is a plan view of an accelerometer using a strain gauge, and Figure 2 (b) is a side view of it. First, when acceleration is applied to this accelerometer, the force applied to the weight A causes the gauge pace to 8. The resistance of the strain gauge changes in response to the amount of strain generated in the gauge base 8. Figure 2 (1
) - To explain, first, when acceleration is applied to the right, the resistance of the strain gauge 7-a increases, and when acceleration is applied to the left, the resistance of the strain gauge 7-b increases. The change in resistance of each strain gauge is converted into voltage by the sensor amplifier shown in FIG. 312. The magnitude of the converted voltage is proportional to the amount of change in the resistance of the strain gauge. The signal converted to voltage is passed through the comparator shown in Fig. 6, 13, and signals below a certain voltage are cut off, and signals above a certain voltage are passed through the voltage constant frequency converter shown in Fig. 3, 14, where the frequency is proportional to the magnitude of the voltage. is converted into a pulse.

Figure 2 (C) is a cross-sectional view of an accelerometer using a piezoelectric element, which is a compression type that utilizes the longitudinal effect.The piezoelectric element material is crystal,
Rochelle salt, barium titanate, ZnO, etc.
It takes advantage of the property that polarization occurs in opposing crystal planes when a dynamic force is applied.

In Fig. 2 (2), when receiving acceleration to the right, the piezoelectric element 10-b
The weight 9 receives a force and becomes polarized in proportion to the force.

Conversely, when the piezoelectric element 10-a receives a force to the left, polarization occurs7. The sensor up 12 generates a voltage signal proportional to the degree of polarization of each piezoelectric element, which is then converted into a signal with a number of pulses proportional to the magnitude of the voltage in the same manner as described above.

Reference numeral 4 denotes a conversion section, which includes a sensor amplifier 12 for amplifying the signal from the accelerometer and converting it into voltage, a comparator 13 for checking whether the voltage is higher than a specific voltage, and a voltage for converting the signal into a frequency pulse proportional to the magnitude of the voltage. It consists of a frequency converter 14.

5 is a pen-shaped housing which incorporates the accelerometer 2.3 and converter 5 as described above and is equipped with a function button 1, and 5-a is a pen-shaped housing having a writing function such as a pencil, ballpoint pen, felt-tip pen, etc. Department.

(effect) Hereinafter, the effects of the present invention will be explained.

When the X-Y coordinate input device is moved in the x-y plane, the two accelerometers at the tip receive an X component and an X component of acceleration for the movement, respectively. For example, the X component of acceleration for movement is added to the accelerometer 2, and a voltage corresponding to the magnitude of the acceleration is determined as a signal.

The above signal is converted by a voltage-frequency converter 14 into a pulse having a frequency proportional to the magnitude of the voltage and sent to the computer. If you count this, the counted number will be the above X
-Y coordinate This corresponds to the X component of the movement of the input device.

Regarding the X component of the amount of movement, the accelerometer 3 outputs a pulse signal proportional to the X component of the amount of movement of the XY coordinate input device in the same manner as described above.

As described above, each displacement of the X-Y coordinate input device on the x-y plane is converted into an X component of n displacement amount, and a pulse corresponding to the X component, which is sent to the computer.

In the computer, the cursor on the CRT is moved according to the count number of each pulse, and the movement of the above-mentioned X-Y coordinate input device on the x-y plane and the cursor's X-Y coordinates on CR$T are It can be made compatible.

(Effects of the Invention) As described above, the present invention has excellent durability and can be used in any environment because there is no mechanical drive and the detection section is sealed inside the housing.

In addition, since it can be used floating above the desk, no special space is required regardless of the surface condition of the desk.

In addition, the pen-like shape makes it easy for beginners to operate, and it also has a writing function, so it is possible to input letters and pictures written on paper directly into a computer.

[Brief explanation of drawings]

FIG. 1(a) is a sectional view of an embodiment of the present invention, FIG. 1(b)
is a schematic diagram of an embodiment of the present invention, FIG. 2(a) is a plan view of an accelerometer using a conventional strain gauge, and FIG. 2(b) is a side view of an accelerometer using a conventional strain gauge. Figure 2 (
C) is a cross-sectional view of an accelerometer using a conventional piezoelectric element.
The figure is a block diagram of the converter 4, and FIG. 4 is a diagram showing a specific example of a conventional X-Y coordinate input device. 1...Function button, 2...Accelerometer, 6
... Accelerometer, 4... Conversion section, 5... Housing, 5a... Writing section. <a) (b)
Fig. 1 Fig. 2 Fig. 3 @ ■Ji, i1 te 7 ■ Shira, 7 po 1 shi ■ Gigi γ4 E
■Kutuna lCI and Figure 4 ■Mali ■Lai ← Bezo Figure 4 Procedures in writing (11 shots): February 20, 1985 Patent Application No. 058934 2, Name of the Invention -Y coordinate Human power device 3, Person making the correction Relationship with the case Patent applicant 4, Self-initiation of the IE order 5, Subject of correction, Contents of correction: 2) Figure 3 of the drawing is corrected as shown in the attached sheet. .

Claims (1)

[Claims] The tip functions as a writing instrument and has a pen-shaped housing with a function button for selecting information, and two accelerometers are placed inside the tip at different angles of 90 degrees. By emitting pulse signals that are proportional to the displacement of the housing in the x-y space in the X- and Y-axis directions,
-X-Y characterized by replacing displacement on the Y plane
Coordinate input device.