JP2570622B2 - Handwritten information input device and tablet device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a handwriting information input device for inputting information such as characters and figures by handwriting, and more particularly to a handwriting information input device provided with a tablet device capable of measuring pen pressure at the time of input. is there.

[0002]

2. Description of the Related Art Conventionally, handwritten information input devices for inputting information such as characters and figures by handwriting have been known. This kind of handwritten information input device has a tablet device having a pen pressure measuring means. This pen pressure measuring means measures the pen pressure by using a tablet body having a pressure-sensitive sheet in which a pressure-sensitive element or the like is arranged for each pixel and by changing the electrical characteristics of the pressure-sensitive element for each pixel. .

In a handwritten information input device, a means for detecting pressure is provided at the tip of an input pen for inputting handwritten characters or graphics, and the writing pressure at the time of input is detected.

[0004]

In the above-mentioned conventional input tablet for measuring pen pressure for each pixel, wiring for measuring electric characteristics is required for each pressure-sensitive element arranged for each pixel. Also, a means for monitoring the electrical characteristics of all the pixels is required, which has a disadvantage that the structure becomes complicated.

In a handwritten information input device having means for detecting pen pressure at the pen tip, in order to input the pen pressure data to a character / graphic input device, the input device and the input pen are connected by a wiring code. It is not possible to create a handwritten character / graphics input device that needs to be connected and has an input pen without a code.

Accordingly, a first technical problem of the present invention is to provide a tablet device capable of inputting analog data called pen pressure to a handwritten information input device with a simple configuration and a handwritten character / graphic input device using the tablet device. To provide.

A second technical object of the present invention is to provide a tablet device capable of detecting a correct writing pressure value with an input pen and a handwritten information input device using the tablet device.

A third technical object of the present invention is to provide a tablet device which can easily operate an input pen and a handwritten information input device using the tablet device.

[0009]

In order to solve the above-mentioned problems, a handwritten information input device according to the present invention comprises: a handwritten information input device having a tablet device for inputting information with an input pen; Consists of a tablet body filled with fluid and having elasticity at least on the top,
A pressure gauge that measures the pressure of the fluid and outputs a pressure value;
And a pen pressure detecting means for detecting a pen pressure of the input pen with reference to the pressure value.

Here, in the handwriting information input device of the present invention, the tablet device includes a thermometer for measuring the temperature of the fluid in the tablet body, and the writing pressure detecting means includes an expansion coefficient and a temperature of the fluid. With reference to the above, it is preferable that the pressure value is corrected to be the pen pressure.

Further, in the handwriting information input device according to the present invention, a coordinate detection sheet provided on an upper portion of the tablet main body for detecting a coordinate position touched by the input pen, and the coordinate position and the pen pressure are matched. It is preferable to provide a control means for controlling.

Further, in the handwritten information input device according to the present invention, there is provided a display device for displaying strokes of the input pen as lines, wherein the control means controls the position of the lines according to the coordinate positions detected by the coordinate detection sheet. Preferably, the thickness of the line is determined according to the pen pressure.

According to the present invention, in a tablet device for inputting information with an input pen, a tablet body filled with a fluid and having at least an upper portion having elasticity is provided.
A pressure gauge that measures the pressure of the fluid and outputs a pressure value;
A tablet device comprising: a writing pressure detecting unit configured to detect a writing pressure of the input pen with reference to the pressure value.

In the tablet device of the present invention, a thermometer for measuring the temperature of the fluid in the tablet body is provided, and the pen pressure detecting means refers to the expansion coefficient and the temperature of the fluid, It is preferable that the pressure value is corrected to make the writing pressure.

Here, in the tablet device of the present invention, a coordinate detection sheet provided on an upper portion of the tablet main body for detecting a coordinate position touched by the input pen, and controlling the coordinate position and the pen pressure together. It is preferable to provide control means for performing the control.

In the present invention, the information is a figure,
Characters, symbols, etc. that can be distinguished visually are called.

[0017]

In the handwriting information input device of the present invention, an analog pressure value generated in the tablet when the input pen presses the tablet is measured with a single pressure gauge as a pen pressure, thereby providing a simple configuration. Analog pen pressure value can be detected.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing a configuration of a handwritten information input device according to an embodiment of the present invention. As shown in FIG. 1, a handwritten information input device according to an embodiment of the present invention is a tablet body 1 that is hollow and hermetically filled with an arbitrary fluid.
A pressure gauge 2 for measuring a fluid pressure in the tablet body 1 and outputting an analog pressure value; an input pen 3 for performing handwriting input; a thermometer 4 for measuring fluid temperature in the tablet body; A pen pressure detecting means 5 for detecting pressure generated inside the tablet main body 1 as the pen 3 presses on the tablet main body 1 as pen pressure and outputting pen pressure data;
A coordinate detection sheet 6 for detecting a coordinate position in contact with the tablet body 1, a coordinate detection means 7 for detecting a coordinate position obtained from the coordinate detection sheet 6 as coordinate data,
A control unit 8 for controlling the entire apparatus including controlling the coordinate position and the pen pressure in accordance with the pen pressure data and the coordinate data, and a display apparatus for displaying strokes of the pen 3 as lines 9 is constituted. The pen 3 according to the embodiment of the present invention is a cordless pen that is not electrically connected to the handwriting information input device by a cord, and a normal ball-point pen, a fingertip, or the like can be used. The coordinate detection sheet 6 is provided by
The same input panel as that disclosed in JP 17472 and JP-A-63-157221 is used. Also,
The fluid filled in the tablet body 1 may be either a liquid or a gas.

FIG. 2 is a view of the tablet body 1 as viewed from the side. FIG. 2A shows a state before the pen 3 presses the tablet body 1, and FIG. 2B shows a state when the pen 3 presses the tablet body 1. Are shown respectively.

Referring also to FIG. 2, when the pen 3 comes into contact with the coordinate detection sheet 6 from the state of FIG.
, The pressure in the fluid in the tablet body 1 is generated, and the change is measured by the pressure gauge 2 provided in the tablet body. Here, in the writing pressure detecting means 5, the analog pressure value in the fluid measured by the pressure gauge 2 is converted into writing pressure data and transmitted to the control unit 8.

As shown in FIG. 2A, the pen pressure is 0 when the pen 3 is not pressing the tablet body 1, but when the fluid itself expands / contracts due to the temperature in the fluid, Correct pen pressure cannot be obtained. Therefore, in the embodiment of the present invention, the thermometer 4 for measuring the fluid temperature in the tablet body 1 is installed, and the
Then, the expansion coefficient of the fluid based on the obtained fluid temperature is calculated, and a writing pressure correction process is performed to obtain a correct writing pressure.

FIG. 3 is a flowchart showing processing of the handwritten information input device according to the embodiment of the present invention. As shown in FIG. 3, a step S1 for judging the temperature conversion of the fluid in the tablet body 1, a step S2 for correcting the pen pressure, a step S3 for judging a pen pressure of 0 or more, a step S4 for detecting coordinates of pen contact, and a step S5 for judging the pen pressure , S7, and S9, and pixel display steps S6, S8, and S for respective pen pressure levels
10 and S11.

FIG. 4 shows the thickness of a pen stroke displayed on the display device 9 according to the pen pressure level. In the embodiment of the present invention, four pen pressure levels are determined, and the pixels displayed on the display device 9 at the first level are shown in FIG.
In the pattern shown in FIG. 4A, the pixels displayed on the display device 9 at the second level are shown in FIG. 4B, and the pixels displayed on the display device 9 at the third level are shown in FIG. In the one-frame pattern shown in c), the pixels displayed on the display device 9 at the fourth level are the patterns shown in FIG. 4D.

Next, the operation of the handwritten information input device according to the embodiment of the present invention will be described.
First, based on the temperature data from the thermometer 4, the pen pressure detecting means 5 determines whether there is a change in the fluid temperature in the tablet body 1 (step S1). If there is a temperature change of the fluid at this stage, it is assumed that the fluid in the tablet body 1 has been expanded / reduced due to the temperature change, and the writing pressure detecting means 5 performs writing pressure correction based on the expansion rate ( Step S2).

Next, the writing pressure detecting means 5 sets the writing pressure to 0.
It is determined whether there is the above (step S3).

Here, when the pen pressure is 0 or more, it is assumed that handwriting input has been performed by the pen 3 and the pen 3 touches the coordinate detection sheet 6 by the coordinate detection means 7 under the control of the control unit 8. The detected coordinates are detected (step S4).

On the other hand, if the pen pressure is 0 or less, it is determined that the handwriting input with the pen 3 has not been performed, and the process returns to the start process without performing the coordinate detection process.

Next, when the contact coordinates of the pen 3 are detected,
The controller 8 determines the writing pressure level at that time (steps S5, S7, S9).

Based on the determined pen pressure level, the pixels at the respective pen pressure levels shown in FIGS. 4A to 4D are moved to the positions of the coordinates detected by the coordinate detecting means 7 on the display device 9. indicate. Then, after the display, the process returns to the start processing again. Repeat the above operations sequentially.

[0031]

As described above, according to the present invention, by providing the pressure measuring means for measuring the pen pressure at one place of the tablet main body, analog data called pen pressure can be input by handwriting information with a simple configuration. A tablet device capable of inputting to the device and a handwritten information input device using the tablet device can be provided.

Further, in the present invention, by providing a thermometer for measuring the temperature of the fluid in the tablet body and the pen pressure correction means, the pressure other than the pen pressure generated by expansion / contraction due to the temperature of the fluid in the tablet body can be reduced. It is possible to provide a tablet device capable of detecting a correct pen pressure value and a handwritten information input device using the tablet device.

Further, in the present invention, since the pen pressure is measured by the tablet itself, no electrical connection is made between the handwriting information input device and the input pen. The handwritten information input device used can be provided.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a handwritten information input device according to an embodiment of the present invention.

2A is a diagram illustrating a state before the pen presses the tablet body, and FIG. 2B is a diagram illustrating a state when the pen presses the tablet body.

FIG. 3 is a flowchart showing a process of the handwritten information input device according to the embodiment of the present invention.

FIG. 4 shows the pen pressure displayed on the display shown in FIG.
FIGS. 7A and 7B are diagrams showing pixels of three levels, in which FIG. 7A is a first level, FIG. 7B is a second level, FIG.
(D) shows the fourth level.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tablet main body 2 Pressure gauge 3 Pen 4 Thermometer 5 Writing pressure detection means 6 Coordinate detection sheet 7 Coordinate detection means 8 Control part 9 Display device

Claims (7)

(57) [Claims] 1. A handwritten information input device comprising a tablet device for inputting information with an input pen,
The tablet device includes a tablet body having a fluid sealed therein and having at least an elasticity at an upper portion thereof, a pressure gauge for measuring a pressure of the fluid and outputting a pressure value, and a pen pressure of the input pen with reference to the pressure value. A hand pressure information input device comprising: 2. The handwritten information input device according to claim 1, wherein said tablet device includes a thermometer for measuring a temperature of said fluid in said tablet body, and said writing pressure detecting means comprises an expansion coefficient of said fluid and A handwritten information input device, wherein the pen pressure is corrected by correcting the pressure value with reference to a temperature. 3. A handwriting information input device according to claim 1, further comprising: a coordinate detection sheet provided on an upper portion of the tablet main body, the coordinate detection sheet detecting a coordinate position at which the input pen touches;
A handwriting information input device, comprising: control means for controlling the coordinate position and the pen pressure in accordance with each other. 4. A handwritten information input device according to claim 3, further comprising a display device for displaying strokes of said input pen as lines, wherein said control means controls said line according to a coordinate position detected by said coordinate detection sheet. A handwriting information input device for determining the position of the line and determining the thickness of the line according to the pen pressure. 5. A tablet device for inputting information with an input pen, comprising: a tablet body filled with a fluid and having at least an elasticity at an upper part; a pressure gauge for measuring a pressure of the fluid and outputting a pressure value; A tablet device comprising: a writing pressure detecting unit configured to detect a writing pressure of the input pen with reference to the pressure value. 6. The tablet device according to claim 5, further comprising a thermometer for measuring a temperature of the fluid in the tablet body, wherein the pen pressure detecting means refers to an expansion coefficient and a temperature of the fluid. A tablet device for correcting the pressure value to obtain the writing pressure. 7. The tablet device according to claim 5, wherein a coordinate detection sheet provided on an upper portion of the tablet main body and configured to detect a coordinate position where the input pen has contacted, and the coordinate position and the pen pressure are matched. A tablet device comprising: control means for controlling.