JPS58101332A - Touch panel type input device - Google Patents

Abstract

PURPOSE:To obtain X/Y coordinates of a depressed point of a board simply, by providing a mobile electrode provided at four corners supported with a spring and a fixed electrode opposing to the mobile electrode, and detecting the change in the phase of an applied voltage. CONSTITUTION:Four corners of a board 18 are supported with a spring 19, an electrode fixed on the board 18 is set as a mobile electrode and opposed to a fixed electrode. An output of a sinusoidal wave oscillator (not shown) is given to the fixed electrode 9 as it is, and applied to the mobile electrode 10 via a phase shifter. In depressing an arbitrary point of the board 18 and providing a displacement to the board 18, the phase of a signal from each terminal 11 is changed, the amount of change is different from each corner and coordinates X/Y of the depressed point can be determined unequivocally. The change in the phase from the four corners is computed at a computer to obtain the X/Y coordinates. Thus, the input of information can be done simply by overlapping the board 18 on the pattern and depressing a desired point. The similar result can be obtained at three supporting points of the board.

Description

[Detailed Description of the Invention] This invention is based on the position (coordinates) on the panel pressed with a finger or the like.
This relates to a touch panel type input device that is performed manually by detecting V. There are many types of K devices that input the coordinates of that point by pressing a point on the panel (hereinafter referred to as a touch panel type input device). do. Part 1 II shows one example of this.

In the first wJ, 1 is a slope made of glass or the like, 2 is a p-docell, and one piece is placed in each of the 8FIIs of 1,1[1. S is a signal processing ms, and 4 is a wiring between the e-docell 2 and the signal processing s3. The system SS consists of an amplifier and an arithmetic unit, and calculates the ratio of the output voltages of the four p-cells 2 to identify which position on the plate 1 is pressed. There is also a method of using a strain gauge attached to a plate instead of the 11 dosel 2 as a sensor, and there is also a method of using 3 of these 7 gauges. When used as a senna, the input mechanism becomes large and expensive, and when using a stone gusset with a plate spring attached, there is a disadvantage that the sensitivity varies widely. In addition, the output voltage of these sensors is weak,
When using a conductor gauge, there are drawbacks such as a large temperature coefficient, so for the signal 46m111S, an amplifier with a good B/N and temperature compensation are required. Therefore, the signal mu
There was a drawback that s was expensive.

#I8 is a diagram showing another conventional method. S and 6
is an electrode made of a transparent sheet, and the electrodes 2 and 6 are spaced apart from each other by a distance V such that when the electrodes 2 and 6 are pressed down, the electrode 5 bends and the electrodes and K1m touch. Both electrodes 1 and
A conductive film is formed on the opposing surfaces of the electrode l.
and electrode 1 at the intersection point of any selected one of 6.
When pressed down from above, electrodes 1% and 6 come into contact, and conduction is established between the selected electrodes 5 and -. When this conductive state is detected by the detection 11m1, coordinates can be input by pressing #1 or the like. In this method, the electrode 6 may be a glass plate, but since the electrode glue must be flexible, it has drawbacks such as being easily damaged (and not looking good as a device).

In addition, there are devices that reflect and utilize ultrasound waves, but ultrasound! 11111. The disadvantage is that the dragon sound wave pendulum is necessary and expensive, and the detection circuit is also expensive.

The present invention has been made in view of the above points, and the sensor 11. The present invention relates to a touch panel type human power device that has a simple and inexpensive configuration with a detection circuit.

below! The invention will be explained in detail by I1m.

The third @ is the detection am of the touch panel type input am of this invention.
Nohara! FIG. 1 is a sine wave AM device, 0 is a differential circuit, a phase shifter such as an integral 81m, - is a fixed electrode, and 1o is a movable electrode. The fixed electrode (1) and the movable electrode (10) face each other and form a capacitor, thereby forming a sensor section (11). 12 is an output terminal of the sensor 1111. The capacitance of this filling changes as the movable electrode 10 moves.

The movable electrode 10 is connected to this variable capacitance capacitor so that the mainboard wave relaxation I! A signal from 1 is induced. On the other hand, the signal from the phase shifter port is applied to the movable electrode 10 through the capacitor 18V. The signal transmitted from the sine wave generator 1111T to the movable electrode 10 and the signal transmitted from the phase shifter port to the movable electrode 10 are mixed and sent to the terminal 12 as a sine wave. The phase of this sine wave is an intermediate value between the phase of the signal from the sine liquid assr and the phase of the signal from the phase shifter S, and the movable electrode 1
0 approaches the fixed electrode Il■ and the capacitance between the two electrodes 9 and 10 increases, it approaches the level of the sine liquid mast, the movable electrode 10 moves away from the fixed electrode -, and the capacitance between the electrodes 9 and 10 increases. As the capacitance becomes smaller, the phase of the movable electrode 100 approaches the phase of the shifter S, and the phase of the movable electrode 100 approaches the phase of both electrodes I.

1illllK for 10! − is determined, so the movable electric @1
When the phase of 0 [411] is output, the distance between the two electrodes 9 and 11 can be identified. 14. ,．． 7! lli 1 F
1 shows an example of a circuit for detecting the phase difference between the fixed electrode and the movable electrode. 14 is a waveform shaping circuit such as a Schwarz mill, and 11 is an equivalent trigger pulse generation 1m11 constructed by a circuit or logic circuit.
．． 1@ is a set-reset type 7-rip hoop, and 1T is a low-pass filter. - One-pass filter IFF) output voltage corresponds to the phase difference between both electrodes 1i110, jC. The amount of displacement of the electrode 1 can be known.

No. 411 indicates fI of the input mechanism of the touch panel type human power device of the present invention, 11 is a plate made of glass, acrylic, etc.;
- is a spring Q, [11 is supported by a spring 1 $. A fixed electrode 0 and a movable electrode 10 are provided at the corner of the plate 1-, and the constant electrode
0 if, lI[11KH1i constant 8h”C exists.

1 [When a point on 11 is pressed, each of the springs 11 bends according to the pressed position. It is uniquely determined corresponding to the coordinates of. For this reason 4
The relative relationship between the phase changes of the signals generated at the movable electrodes 10 is uniquely determined in accordance with the coordinates of the pressed point on I[1@. By calculating the phase changes 1 of the four Machi-Kinetsu @1 before and after the press by the combiator, it is possible to determine the coordinates of the pressed point.

In the 411th, there are 4 sets of SEV"'ll-l111v, but as shown in RU 15IltC, there are 3 sets of 3 pieces.
It is possible to input dimensional coordinates. If one-dimensional coordinates are not input, two sensor units 11 are sufficient. In these cases, 43 or 3 detection circuits are required depending on the number of sensor units 11.
It's amazing how little one can do individually.

No. 611I is an example of a case where a capacitor 18V is connected to the T side of a sine wave oscillator, but it has the same function as the case of No. 311.

In the above, a capacitor 1s is used, but a resistor 1i12 may be used in place of the capacitor ISK, as shown in V7II. In this case the resistor ZtV*
It is better to take out the signal when it is wired.

The signals applied to the fixed electrode S and the movable electrode 10 are generated by #C quadrature am, etc. instead of using a transfer device/V.
The six-phase detection gem that may be generated by s*ms includes:
Pumetato inspection all road, exclusive oi1wii
! The phase test solution used was tested for 4 hours.

The m-th circuit is a circuit 111 (PLL type) of another embodiment of this relaxation, 12 is a sine generator*gim, and zs is a voltage-controlled sine m5m5. The output voltage can be taken out from terminal 24.

In addition to being used as a character input device in combination with a dial, this ga-mei touch panel type human powered device can also be used as a character input device by making the board 1S a transparent board, so that it can be used in front of a display such as CB'l'. In addition, by continuously explaining the coordinates, it is also possible to input handwritten figures and handwritten characters.

It should be noted that the plate 11 itself may be constructed of a flat display such as a liquid crystal display or an erator luminescence display, and it goes without saying that the vertical relationship does not have to be as shown in the figure.

That’s all #JIKl! 15. The touch panel type input device of the present invention has an extremely simple mechanism, the circuit can be constructed from a small number of inexpensive general-purpose parts, and the device can be manufactured at low cost and in a small MKIA.

Furthermore, this invention has the advantage of l1vA because it does not use a member V that is easily damaged like a flexible sheet.

[Brief explanation of the drawing]

No. 1 II and rattan 2111 are diagrams showing an example of a conventional touch panel glue input device, No. 3 II are gi*aa and 411 (a) e showing the principle of detection 11m of an embodiment of the present invention.
(b) is a plane showing the input mechanism part of one embodiment of the present invention, and the Confucian garden, Ill;son is also a plane, the sixth
figure. The ym and gjm are the embodiments of this invention, respectively.
It is a garden that shows t'. In the figure, 1 is a sine wave oscillator, Hatake is a transducer, 9 is a fixed electrode,
111 movable electrode, 11 sensor section, 11 terminal, 14 corrugated excitation path, 1! 1 is a trigger pulse generation circuit, 1. is a 7-rip hoop of the Serase reset type, 1T is an m-bus filter, 1s is a plate, and 1. is a spring. Figure 1 1 Figure 2 Figure 3 Figure 4 Figure 11 Ll Figure 5 8 Figure 6

Claims (1)

[Claims] a sensor section for position detection consisting of a fixed electrode and a movable electrode facing each other; a slope for transmitting a push-down blade for input to the movable electrode of the sensor section; a spring supporting this plate; Signal to both electrodes of *! 2 #A to suit the source and the output signal of the above / part output signal 1
A touch panel type input device having a v4I mold.