JPS6152492B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic device equipped with a handwriting input device, and in particular, is characterized in that it is configured to add a normal key input function by effectively utilizing the functions of the handwriting input device. The company provides electronic equipment that does the following.

Hereinafter, the present invention will be explained in detail based on Examples.

FIG. 1 is a perspective view showing the appearance of an electronic desktop calculator that is an embodiment of the present invention.

The main body A is provided with a handwritten character recognition sensor I, a display body D, a power battery (not shown), a mode changeover switch SW (also used as a power switch) between a handwriting input mode and a key sheet input mode, and the like. In the handwriting input mode, input is made by writing characters on the paper Y above the sensor I using the pen P, while in the key sheet input mode, a predetermined key symbol is written on the sensor I. Input is performed by placing the printed key sheet KS and pressing a predetermined part.

FIG. 2 is a block diagram showing a schematic configuration of the same embodiment.

An A-D converter AD is connected to the central processing unit CPU via an interface circuit IF, which converts analog signals from the display D, mode changeover switch SW, and handwritten character recognition sensor I into digital signals and outputs the digital signals. has been done. ROM-A is a read-only memory that stores algorithms for calculations, displays, key input, etc. ROM-B is a read-only memory that stores pattern recognition algorithms for handwritten input, and RAM stores numbers or handwritten characters. This is a random access memory for storing handwriting data, etc.

FIG. 3 is a flowchart of the input routine in the same embodiment.

When this routine is entered, it is first checked at _J1 whether or not the handwriting input mode is selected, and if the mode is selected, the processing from _J2 onwards is executed. First, use _J2 to check whether the pen is touching the sensor, and if it is, and move, input the respective coordinate data using _A1 . Then, use J ₃ to check whether the pen has left the pen, and if it has, wait for 200 msec with A ₂ ,
If the pen is still away from the pen, it is assumed that one character has been input, and the sequence continues as J ₄ → A ₃ , and then A _3.
runs the input character recognition routine. and,
A ₄ displays input characters.

J ₃ , A ₂ , and J ₄ are provided to ensure that characters such as "4" and "5" are entered correctly even when the pen leaves the paper surface during input. .

FIG. 4 is a diagram for explaining the configuration of sensor I and the method of character recognition.

In the figure, T is the base, S _Y is the Y coordinate sensor, and S _X is the X coordinate sensor. When paper Y or key sheet KS is placed on S _Y and pressed with pen P or fingertip F, data proportional to each X and Y coordinate is converted into digital information by _AD converter AD, Y ₁ ], [X ₂ , Y ₂ ], ..., [Xn,
Sampling is performed sequentially until the pen or fingertip separates from [Yn]. Then, when the pen is removed, an algorithm that looks at the starting point, ending point, direction, shape, connections, etc. of each piece of data recognizes what character it is.

FIG. 5 is an explanatory diagram of a method of seeing where a character is written, and shows the case of "2" as an example.

After character recognition, which has sequential coordinate data as shown in the cross mark, determines the maximum and minimum of each data of X and Y as shown in the figure, and calculates the intersection of the diagonal lines of the rectangle based on these values as the address (ADRS) of the character. Calculated without considering.

Through the above steps, what character is written and where is recognized as shown by _A3 in the flowchart of FIG.

Returning to FIG. 3 again, the explanation will proceed.

When J ₁ determines that the mode is key sheet input mode, J ₅ checks whether it is pressed with a pen (fingertip), and if it is pressed, inputs the data with A ₅ .
Select the number or symbol code that corresponds to the location pressed with A ₆ , display it with A ₇ , and check whether the pen (fingertip) is released with J _6. If it is released, return to J ₅ and press next. will be waiting for input.

FIG. 6 is an explanatory diagram when the key sheet is pressed with a fingertip.

Based on the data of the area pressed by the finger, the center address (ADRS) is found, and the input information is calculated based on the contents of the read-only memory ROM-A that stores the correspondence between the address range and the input information. determine what is.

As described above, recognition of _A6 in FIG. 3 is performed.

FIG. 7 is a perspective view showing another embodiment of the present invention.

In the above embodiment, since there is a risk of losing the key sheet, the key symbol display section KS' and the white section W are made into a continuous belt, and the roller _{R 0 is} moved in the f ₁ direction using the _fingertip F. When the sheet is rotated, the sheet moves in the _f2 direction, and the key symbol display area KS' and the white area W are switched, and the mode is also changed. It will be easier to use.

As explained in detail above, the electronic device of the present invention is an electronic device having a handwriting input device, which is added with a key input function by effectively utilizing the function of the handwriting input device, and may be added as the case requires. You can select the input method that is more convenient for you. That is, when it is necessary to create a slip such as a sales slip, the slip is written on the sensor, and data is entered at the same time as the slip is created. At this time, each character is recognized by a sensor. On the other hand, when simply tabulating data based on data that has already been written on something, the key input method is faster than writing it in by hand, so you can input by placing a predefined key sheet on top. In this way, you can use it efficiently by using it in a way that is appropriate for each case.

Further, according to the present invention, the key sheet is arranged in the main body of the device, and is configured such that by sliding the key sheet, a key symbol display portion and a blank portion can be arbitrarily displayed on the handwriting input device. Since the key sheet is integrated into the main body of the device, handling of the key sheet is very convenient, and there is no risk of losing the key sheet.

Furthermore, according to the present invention, when either the key symbol display portion or the non-key symbol display portion of the key sheet appears on the handwriting input device, the handwriting input mode or the key sheet input mode is automatically switched. With this configuration, mode switching operations can be substantially omitted.

The present invention can be implemented not only in electronic desktop calculators but also in various electronic devices such as electronic translators, personal computers, cash registers, and learning machines.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view of one embodiment of the present invention;
The figure is a block diagram showing the schematic configuration of the same embodiment.
The figure is a flowchart showing the input routine in the same embodiment, and FIG. 4 is the sensor I in the same embodiment.
Figure 5 is an explanatory diagram of how to see where characters are written in the same embodiment. Figure 6 is a diagram explaining the structure of the key sheet and the character recognition method in the same embodiment. FIG. 7 is an external perspective view of another embodiment of the present invention. Code A: Main body, I: Handwritten character recognition sensor, D: Display body, SW: Mode changeover switch,
P: Pen, Y: Paper, KS: Key sheet, CPU:
Central processing unit, IF: interface circuit, AD: A-D converter, ROM-A, ROM-
B: Read-only memory, RAM: Random access memory, T: Base, S _Y : Y
Coordinate sensor, _S
R ₁ , R ₂ : Rotor, R ₀ : Roller.

Claims (1)

[Claims] 1. In electronic devices equipped with handwriting input devices,
a belt-shaped key sheet arranged on the main body of the device so that, by sliding, a portion where a predetermined key symbol is displayed and a portion where nothing is displayed can appear arbitrarily on the handwriting input device; a storage means for storing each part of the symbol display part in association with predetermined input information corresponding to the key symbol displayed in the part; means for retrieving predetermined input information corresponding to the operation part from the storage means; What is claimed is: 1. An electronic device characterized in that the mode is configured to switch the mode to a handwriting input mode or a key sheet input mode.