JPS638510B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pattern recognition device for detecting numbers and characters, particularly for wristwatches, etc. This is intended to identify the user not by pressing a separate button or by operating a timer, but by using the same handwritten input.

Conventionally, input means for wristwatches have often been push buttons or keyboards, but inputting letters such as alphanumeric characters requires a large number of key buttons, making it difficult to put this into practical use as a wristwatch. The character input device used in the present invention, for example, draws a character shape by touching and connecting a group of sensor terminals arranged on the top glass of a wristwatch with a standard character pattern registered in a memory circuit. The character shape is determined by comparison. However, after drawing one character and before starting to draw another character, a delimiter signal must be input into the discrimination circuit in some way, for example, ``1'' and ``-''.
It is impossible to determine whether the characters were handwritten or whether the single character "+" was handwritten. Therefore, as a break signal, when you finish drawing one character, you press a separate push button to send the break signal to the discrimination circuit, and you need to take a break of about 1 second before drawing the next character. There is a method of detecting the end of drawing a character by detecting this rest time, but both methods are very inconvenient to use.

The present invention uses a means to generate a delimiter signal when one character is drawn, which cannot be generated when drawing a character.
A double signal generated by tapping multiple times or a simultaneous signal generated by tapping several sensor terminals at the same time with a fingertip can be distinguished from the signal generated when drawing a character. By performing these operations when a letter is written, a break is made between the next letter and the next letter, in order to distinguish between the two letters. The above means can be used for numerical input in the same way as for character input.

A detailed explanation will be given below with reference to the drawings.

FIG. 1 is a top view of a wristwatch showing a part of the structure of the present invention, where 1 is a case, 2 is a top glass, 3 is a gasket, and 4 is a band. This provides waterproofing and insulation.
In the gap, sensor terminals 11 to 1 are inserted as shown in the figure.
9 is placed. These sensor terminals 11
~19 is case 1 due to contact with fingertips, etc.
It is configured so that the sensor terminals are grounded according to the order of the letters drawn by the fingertips. Therefore, these sensor terminals 11 to 19
However, by detecting the order in which they are grounded, it is possible to determine the drawn character shape.

FIG. 2 is a partial cross-sectional view showing the sensor terminal in FIG. 1 installed, and shows the center sensor terminal 1.
5 has a hole in the center of the upper glass 2 and is taken out to the outside by a metal terminal 15A, and the surrounding sensor terminal 11 is connected to the case 1 by a gasket 3.
It is insulated from the upper glass 2 and taken out from the side surface of the upper glass 2 by a metal vapor-deposited wire 11A. The metal vapor deposited wires 11A and 22 are connected to terminals 29 and 30 of a circuit board 27 by springs 25 and 26. There are eight ambient sensor terminals 11 as shown in FIG. 1, and each one is independently connected to the circuit board 2.
7, is connected to. As is clear from this figure,
Each sensor terminal is insulated from case 1 which is grounded, and when a fingertip touches it, it is grounded to case 1 via the human body, and the input order of the glyphs is determined.
The circuit board 27 is adapted to be provided with the circuit board 27.

FIG. 3 is a configuration diagram in which sensor point inputs are configured as sensor side inputs in order to discriminate character shape detection according to the present invention as side inputs. 11-19
is a sensor point input consisting of nine sensor points, and by connecting each point input position to an adjacent point input position with a straight line, side inputs 41 to 68 shown in the figure are obtained. There are 28 side inputs 41 to 68, and by using these side inputs, 26 alphanumeric characters, numbers, etc. can be easily expressed. An example is shown in FIG.

Figure 4 shows the character shapes E, G, B, and Q expressed using nine sensor terminals.For each character shape, sensor terminals 11 to 19 are in the ON state because the fingertip passes through them. Then, the sensor terminal turns ON,
It is not possible to distinguish the glyph shape using only the combination of OFF and OFF. However, when identified by edge input, the character G has the edge input 62 shown in FIG.
For example, character B has side inputs 55, 57, character Q has side inputs 62, 58, and so on, character E, G, B, and Q have the side inputs shown in Fig. It is possible to make a determination based on the inputs 41 to 68. Moreover, the glyph patterns that are registered in the memory circuit in order to distinguish each glyph shape only need to register the different parts of the side input for each glyph, and only detect whether or not that side input was received. The capacity of the memory circuit can be very small, and the number of determination steps and time required can be reduced.

FIG. 5 is an example of a method in which the pattern recognition portion registered in the memory circuit in the character shape of FIG. 4 is represented by a solid line. For character E, side input 68,
67, 64 are registered, and for character G, side inputs 45, 67, 62 are registered, and for character B, side inputs 67, 62 are registered.
64, 56, 57, for character Q, side input 45, 5
5,62, are registered. Each registered edge input has its own unique features,
It is determined by the relationship between all alpha characters and the shape of the numbers. For example, when drawing a glyph G, it can be distinguished from the glyph E by the presence of the side input 62, from the glyph B by the absence of the side input 57, and from the glyph Q by the presence of the side input 55. They can be distinguished from each other by their absence. Therefore, as mentioned above, the glyph pattern to be registered in the memory circuit only needs to be input from a part of the glyph, that is, the characteristic part of the glyph that is not found in other glyphs, and handwritten input is based on the characteristic part of the glyph. All you have to do is compare it with As a result, the effects are a reduction in memory capacity and a faster comparison time.

The method of registering and determining only the characteristic parts of each character shape in the memory circuit is not limited to the edge input method adopted in this example for convenience of explanation;
The point input method explained in FIG. 4 may also be used. However, in order to accurately distinguish character shapes, it is necessary to increase the number of sensor terminals and to register the order of strokes drawn on the sensor terminals in a memory circuit.

To explain the method of the present invention using the side input method, the side inputs once entered into the handwriting input register of the character E are 45, 51, 44, 67, 64,
60, 68, 56. On the other hand, the side inputs that enter the handwriting input register for glyph G are 51, 45, 4.
4, 67, 64, 60, 68, 56, 62. When two glyphs E and G are drawn consecutively, unless some kind of delimiter signal is input between the last side input 56 of glyph E and the first side input 51 of glyph G, the discriminating circuit will draw the glyph. E and G are processed as one character and a typo is determined. This delimiter signal can be generated by a signal generated by another push button operation, or by
It is possible to insert some sort of delimiter signal between two glyph inputs in the handwriting input register by leaving a small time interval between drawing two characters, but when drawing glyphs, , very difficult to operate.

The method of the present invention provides a combination of sensor terminals that cannot occur when drawing a character, for example, after the last side input 56 of the character E.
By tapping the sensor terminal 16 twice, tapping the sensor terminal 19 twice, etc., the end of the character E is entered into the handwriting input register, and is distinguished from the first side input 51 of the next character G. The edge input consists of a combination of sensor terminals, for example, the shape E
The last side input 56 is the sensor terminal 15, 16
It is made from an AND gate by a combination of . Similarly, for an input that hits the sensor terminal twice, you can count that input twice and use the output of the two counts as an AND gate. In this way, after drawing a glyph, using the same sensor terminal to draw an input signal that cannot occur in the glyph, the operation is very simple and it is also easy to determine the delimiter signal. In this embodiment, the method of tapping the sensor terminal twice has been explained, but the side input that does not appear in the character shape is the side that connects the two sensor terminals, for example, the side input 65 that connects the sensor terminals 17 and 16.
may be determined as a delimiter signal, or after inputting a combination of two or more edges, for example, edge 56,
It is also possible to draw the side input 56 by hand again and determine the side double input.

FIG. 6 is a waveform and block diagram showing the process of converting the sensor terminal input waveform into side input and comparing it with the memory circuit. 101 is a waveform diagram when the sensor terminal is touched with a fingertip, 13F, 12
F, 11F are the waveforms of the respective sensor terminals, 113
is triggered by the sensor terminal waveform 13F, and the delay time 112D of the sensor terminal waveform 12F
The flip-flop output waveform that is turned off by
Similarly, 112 is a flip-flop output waveform that is triggered by the sensor terminal waveform 12F and turned off by the delay time 111D of the sensor terminal waveform 11F, and 111 is the flip-flop output waveform that is triggered by the sensor terminal waveform 11F.
The flip-flop output waveform triggered by F. The trailing edges of the waveforms 113 and 112 are indicated by diagonal lines 13 and 12, and 12 and 11.
They overlap with waveforms 112 and 111, respectively, indicating that sensor terminal waveforms 13F and 12F and sensor terminal waveforms 12F and 11F have been input successively. In other words, the point input of the sensor terminal is
The diagonal lines 13 and 12 are converted to side inputs, and the diagonal lines 13 and 12 can be treated as side inputs 51 indicated by the same numbers in FIG. Waveform 130
is a collection of these side input waveforms using an OR gate, and this is input to handwriting input register 1.
40, start from the beginning as shown in the figure. Of course, the side input 51 is stored as a converted code, such as bit 0001 and side input 45 as bit 0101, as shown in the figure. On the other hand, in the memory circuit 141, for example, the side input characteristic parts of the character G, 45, 67, 62, shown in FIG. 6 are converted into bit codes and stored. , the comparison circuit 150 compares the character 45 of the character G with respect to the handwriting input register 140, and if so, the character 67, 62, and so on.
If all edge input bit codes exist, at least the conditions for character G are satisfied, and it is determined that the character is not character EBQ as shown in FIG.

FIG. 7 shows an example of a circuit for creating a character shape delimiter signal using a sensor terminal input circuit. There are various methods of creating a delimiter signal as explained in FIG. 5, but in this example, a method will be described in which the sensor terminal 19 is tapped twice at the end of a handwritten character. The sensor terminal 19 in FIG. 7 is connected to the CMOS amplification circuit 121.
It is connected to V _DD with a resistor 123. When the fingertip 125 touches the sensor terminal 19, it is grounded to the ground 127 through the human body, and the input terminal 1
28 causes a voltage drop due to the resistor 123. 1
30 and 131 are protection diodes that protect the CMOS from static electricity from the human body or clothing that is applied to the sensor terminal.
121 is protected. CMOS121 output 1
9F is placed in a one shot type FF162,
It is shaped into a square wave and appears at output 164. When the sensor terminal 19 is tapped twice with the fingertip 125, the waveform of the output 164 becomes a double waveform as shown in the waveform 166, which is counted by the counters 170 and 171 to generate one pulse of the delimiter signal 176. The counters 170 and 172 are reset by the inputs 178 of the sensor terminals 11 to 18 so that this one pulse waveform 176 is generated only when the sensor terminal 19 is tapped twice in succession.
It is designed so that the count does not work when inputting glyphs. When the delimiter signal 176 occurs, its output is connected to the counter 17 by the reset line 180.
0,172 is cleared and the state waits for the next delimiter signal. The delimiter signal 176 is the counter 1
It can also be obtained by connecting the outputs of 70 and 172 with an AND gate. When the delimiter signal 176 is obtained in this way, the input to the handwriting register 140 shown in FIG. 6 is stopped, and the memory circuit 1
A comparison with 41 can begin. In addition, when glyph input is performed continuously, either input something equivalent to the delimiter signal 176 into a part of the handwriting register, or use the delimiter signal 176 to enter the handwritten input into other handwriting registers. Switch registers.

FIG. 8 is a circuit diagram in which a character shape delimiter signal is generated by simultaneous input of two or more sensor terminals. As shown in Fig. 1, the sensor terminals 13 and 15 are located at positions where they can be touched at the same time with the fingertips, and when one character shape is drawn, if these two terminals are touched at the same time, a signal that cannot occur when drawing a character shape is generated. can be created. The inputs to the sensor terminals 13, 15 are connected to amplifier circuits 182, 1 similar to those shown in FIG.
One shot type FF186,18 widened by 84
8, and an output waveform 192 is obtained at the AND gate 190 only when there are simultaneous outputs. If this output waveform 192 is used as a character shape separation signal as in the case of FIG. 7, two character shapes can be distinguished.

The configuration of the present invention includes an input terminal board on which a plurality of sensor input terminals are arranged for pattern input;
a handwriting input register that stores a glyph drawn by passing through the sensor terminal as an input signal of the position of the sensor terminal; circuit means for generating a V-shaped delimiter signal; a memory circuit for storing characters or numbers formed by the combination of the sensor terminals as an input for the position of the sensor terminal; and a handwriting input register and memory circuit. The input terminal board, which consists of a comparison circuit for sequentially comparing the contents and determining the shape of the characters, and has sensor input terminals arranged thereon, can be installed in wristwatches, clocks, pocket watches, calculators, etc. Further, the sensor terminal combination circuit means for generating the character-shape delimiter signal has the following functions for one of the sensor terminals:
Two or more consecutive handwritten inputs, multiple handwritten simultaneous inputs, side inputs that are not in the character shape, or combinations of side inputs are processed to increase the width.

As described above, when determining a handwritten character shape by a combination of sensor terminals, the present invention applies a special handwriting input to the sensor terminals between one character shape and the next drawn character shape, and detects it. Through processing, a separation signal between two glyphs is generated, making it easier to distinguish between the two glyphs. There is no need to set an interval time after the glyph, etc.
This has a great effect.

[Brief explanation of the drawing]

FIG. 1 is a top view of a wristwatch showing a part of the configuration of the present invention, FIG. 2 is a partial sectional view of FIG. 1, and FIG. 3 is a configuration diagram of the sensor terminal and side input of the present invention. Fig. 4 is a glyph diagram displayed by the sensor terminal, Fig. 5 is a glyph diagram showing the characteristic parts of the glyph in Fig. 4, Fig. 6 is an explanatory diagram showing the sensor input waveform and the progress of glyph shape determination, FIG. 7 is a circuit diagram showing an example of a circuit for generating a character-shape separation signal, and FIG. 8 is a circuit diagram showing another example of a circuit for generating a character-shape separation signal. 11-19...sensor terminal, 41-68...
Side input, 140...Handwriting input register, 14
1... Memory circuit, 176, 192... Character shape separation signal.

Claims (1)

[Scope of Claims] 1. At least nine sensor terminals disposed on an input terminal board, and a handwriting input register that stores numbers and characters drawn by tracing the sensor terminals as input signals at the positions of the sensor terminals; A circuit means for generating a delimiter signal of numbers and characters by a combination of the sensor terminals, a memory circuit preconfigured as an input for the position of the sensor terminal, and the contents of the handwriting input register and the memory circuit are sequentially compared. 1. A pattern recognition device comprising a comparison circuit that discriminates between numbers and characters. 2. A patent characterized in that the circuit means for generating a delimiter signal comprises a sensor terminal output by operating a sensor terminal to delimit numbers and characters, and an amplifier circuit and a shaping circuit that amplify and shape the sensor terminal output. A pattern recognition device according to claim 1.