JPS6267626A - Multi-item information input device - Google Patents

Abstract

PURPOSE:To prevent an erroneous input by adopting either detection signal to perform the signal processing when two detection signals of an X-axis scan signal or a Y-axis scan signal detected by an input pen exist. CONSTITUTION:An X and Y coordinate code output circuit 12 outputs X and Y code signals outputted by scanning X-axis electrode groups X0-Xn and Y-axis electrode groups Y0-Yn of a tablet board 13 on a basis of the code output signal from a CPU 11. When an input pen 14 is brought into contact with the intersection between electrodes Xk and Yk, X and Y code signals detected by the input pend 14 are inputtedto comparators 161 and 162 of a detecting part 16 through an amplifier 15; and if voltages of input signals exceed reference voltages set by variable resistors VRX and VRY, outputs are generated and are separated into X-axis and Y-axis scan signals by an X and Y signal separating circuit 17 and are inputted to the CPU 11. If two scan signals exist, the CPU 11 adopts larger one to perform the signal processing.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a multi-item information input device, and more specifically, to a multi-item information input device in which a plurality of input item sheets are bound in a book style, for example. be.

[Prior Art] Taking a kanji input device as an example, in this type of device, an input item sheet (sometimes called a character sheet) in which the necessary characters are arranged is placed on a tablet, and an input pen is used. Depending on the operation, the code of the corresponding character is input using an electromagnetic induction method or an electrostatic coupling method. In that case, for things used in the press and printing, many characters are used due to their nature, and the number is about 15.
If you tried to arrange all of the 000 characters on one tablet, the device would become extremely large and the operability would be extremely poor.

On the other hand, since this type of input device is used differently depending on the destination, it is necessary to make the input item sheet interchangeable.

Therefore, in the past, as illustrated in FIG.
is opened by hand, and the page identification at that time is as shown in Fig. 4, a predetermined number of pages are displayed on the tablet side, that is, if there are n input item sheets 1, n pieces, In this example, four optical sensors 4a to 4d are arranged, and each input item sheet 1 has (n-1) through holes, that is, three through holes 5 and one light reflective tape 6. This is done digitally by adding an identification coat consisting of a combination of.

Furthermore, as is well known although not shown in the drawings, the left and right tablets 7a and 7b are provided with an X@electrode group and a Y fine electrode group orthogonal to each other, and each of them is provided with an X-axis sequential scanning A signal and a Y-axis sequential scanning signal are supplied.

Therefore, when a capacitive coupling detector (hereinafter referred to as an input pen) 3 equipped with an electrode at the tip is brought into contact with a position corresponding to a character, symbol, etc. on the sheet 1, the tablets 7a and 7b on the bottom surface of the sheet 1 are touched. The X-axis sequential scanning signal and the Y-axis sequential scanning signal flowing through a specific X-axis electrode and a specific Y-axis electrode will be detected by the input pen 3 by capacitive coupling.

[Problems to be Solved by the Invention] In such a multi-item information input device, the size of one frame on the sheet 1 is, for example, about 6 mm in length and width, and therefore, the sheet 1 is used as a tablet 7a.

If the position is not accurately aligned on 7b, there is a risk of erroneous input. This will be explained in detail based on FIGS. 5(a) to 5(C). FIG. 5 (,) shows, for example, three electrodes Xk-□ of the X-axis electrode group of the tablets 7a and 7bl.
, Xk, and Xk+1, and shows a state in which the tip of the input pen 3 is positioned at the electrode Xk via a sheet 1 (not shown).

FIG. 5(b) shows Xk-, which is applied to the input pen 3 with the tip of the input pen 3 positioned at the electrode Xk.

Induced voltages V k-1, V k from Xk, Xk+,
Vk+,.

This shows the relationship between A>B>C and slice bell (detection level). In this case, the slice level setting is A.
, B, or C, there is no problem since only the scanning signal of X@electrode X, k is received. but,
When the input pen 3 is positioned at a point P between the electrode Xk and the electrode Xk+□, if the slice level is set to A, as shown in FIG. Scanning signals are not received together. In addition, when the slide level setting is B, the surface scanning signal is received only on the intermediate line between electrode Xk and electrode
+, scanning signals are received. Furthermore, when the slide level is set to C, the surface scanning signal is received within the range of the boundary width d. Therefore, in this case, it will be an incorrect input.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides that the sheets 1 placed on the tablets 7a and 7b are placed deviated from their normal placement positions, thereby making it difficult to input data. When the pen 3 receives adjacent surface scanning signals of X-axis or Y-axis sequential scanning signals flowing through the X-axis or Ylill electrode group, only one of the scanning signals is forcibly processed as an input signal. It is.

[Embodiment] Hereinafter, an embodiment of the multi-item information input device according to the present invention will be described with reference to FIGS. 1 and 2.

The main circuits of the multi-item information input device according to the present invention include a central processing unit 11 consisting of a microcomputer, etc.
Y coordinate code output circuit 12) X thin electrode group x0 to Xn and Y
Fine electrode group Y. -Yn are arranged in a matrix on a tablet board 13, an input pen 14. Amplifier 15, X-
Y-axis scanning signal detection section 16, X-Y-axis scanning signal separation circuit 1
It consists of 7.

In such a configuration, the X-Y coordinate code output circuit 1
2 is an X-axis electrode group X of the tablet board 13 based on the code output signal from the central processing unit 11; -Xn and Y fine electrode group Y; -Yn outputs an X code signal and a Y code signal, which are scanning signals that are sequentially scanned and output, respectively.

Here, it is assumed that the input pen 14 is brought into contact with the intersection of the X-thin electrode Xk and the Y-thin electrode xk of the tablet board 13 via a sheet (not shown). Then, the X code signal Xk and Y code signal Xk detected by the input pen 14 are amplified by the amplifier 15 and input to the X/Y axis scanning signal detection section 16. The X-Y-axis scanning signal detection section 16 consists of a comparator 161 for detecting the X-axis scanning signal and a comparator 162 for detecting the Y-axis scanning signal, and includes a slider as explained in FIGS. The level can be set using variable resistors VRX and VRY. Therefore, in the comparators 161 and 162, the voltage of the input signal from the input pen 14 is
, VRY generates an output signal when the voltage is higher than the reference voltage (sli level) set by VRY.

The X-Y axis scanning signal detection unit 16 output in this way
The output from the is separated into an X-axis scanning signal and a Y-axis scanning signal by an X-Y-axis scanning signal separation circuit 17, and then sent to the central processing unit 1.
1 is input. The central processing unit 11 performs signal processing based on the currently output code output signal and the output signal from the input pen 14, assuming that the code is selected.

Now, there is no problem when the input pen 14 indicates the intersection of the X thin electrode Xk and the Y thin electrode Assuming that the position between the electrodes Xk+□ is specified, the processing device 11 receives the X-axis scanning signal Xk and the next
The axis scanning signal Xk+ is input and is processed incorrectly. However, in this invention, as shown in FIG. 2, the central processing unit 11 detects the presence or absence of a scanning signal, and if the scanning signal is a single signal, performs signal processing based on the scanning signal, and processes the scanning signal. is two signals, for example, the scanning signal
In the case where k and scanning signal Xk÷, the scanning signal with the larger scanning number, in this case the scanning signal Xk+1, is used for signal processing. Naturally, it is also possible to employ a scanning signal with a small scanning number.

[Effect] As described above, in the present invention, when two scanning signals are detected, only one of the scanning signals is adopted, so that the signal on the specified electrode is Of course, since the detection range can cover almost half of the space between adjacent electrodes, it has a larger detection range compared to the conventional method, which covers almost only the top of the electrodes. . Therefore, there is an advantage that there is no need to accurately align the character sheets positioned on the tablet sheet by sheet as in the past.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of a multi-item information input device according to the present invention;
FIG. 2 is a flowchart for explaining signal processing according to the present invention, FIG. 3 is an external view of a multi-item information input device, FIG. 4 is a page detection mechanism diagram of the multi-item information input device, and FIG. )~
(c) is a diagram for explaining the state of signal detection by the input pen. In the figure, 11 is a central processing unit, 12 is an X-Y coordinate coat output circuit, 13 is a tablet board, 14 is an input pen, 1
5 is an amplifier, 16 is an X-Y axis scanning signal detection section, and 17 is an X
- Y-axis scanning signal separation circuit.

Claims (3)

[Claims] (1) X-axis electrode group and Y-axis arranged on the tablet
In a multi-item information input device in which a group of axial electrodes is indicated by an input pen via a sheet on which characters are arranged, and the indicated position is detected by signal processing of the output signal from the input pen, the above-mentioned A multi-item device characterized in that when there are two detection signals of an X-axis scanning signal or a Y-axis scanning signal detected by an input pen, one of the detection signals is adopted for signal processing. Information input device. (2) The multi-item information input device according to claim (1), characterized in that one of the detection signals has a larger scanning number. (3) The multi-item information input device according to claim (1), wherein one of the detection signals has a smaller scan number.