JP2010102378A - Input control device and input control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an input control device detecting the direction of an input pen positioned on a display screen, and changing an input mode as if using an ordinary writing tool. <P>SOLUTION: The input control device includes: a display part 40 displaying information on the display screen; an instruction part 10 instructing an input position on the display screen; a position detection part 30 provided around the display screen to output a position detection signal detecting the input position; a signal reception part 21 provided in the instruction part to receive the position detection signal; and an input control part controlling the input mode on the display screen based on the signal received by the signal reception part. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an input control device and an input control method for inputting on a display screen, and more particularly to an input control device and an input control method capable of changing an input form as if using a normal writing instrument.

Handwritten input devices, so-called touch panels, are used in many input devices. Many types of touch panels have been developed, such as an analog resistance film method, a capacitance method, an ultrasonic surface acoustic wave method, an infrared ray blocking method, a reflective beam scanning method, and an optical image sensor method. And the pen used for these touch panels is also well-known like patent document 1 thru | or 4.
Japanese Patent Application Laid-Open No. 2004-133867 discloses that handwriting input is performed when the first sensor provided at one tip of the stylus pen operates according to the orientation of the pen, and erasure is performed when the second sensor provided at the other tip operates according to the orientation of the pen. Is a handwriting input device.
In Patent Document 2, a handwriting input pen is provided with a permanent magnet, and a handwriting input operation and an erasing operation are determined depending on whether the N pole side or the S pole side of the permanent magnet is in contact with or close to the tablet depending on the orientation of the pen. Is.
In Patent Document 3, a pen core that can be projected and retracted from the tip of the case and interlocked with a switch for switching the resonance frequency of the LC circuit is provided. When the pen core is projected by operating the knock, the pen function and the pen core are retracted. It is a point function.
In Patent Document 4, pressure detectors are provided at both ends of a pen, and the pen pressure and a slight lift of the pen from the paper surface are detected based on the pressure detected by the pressure detector.
JP-A-4-165522 JP-A-6-76118 JP-A-6-102989 JP-A-6-314154

The pens of Patent Documents 1 to 4 include a sensor, a permanent magnet, a resonance frequency changeover switch, or a pressure detector provided in the pen, and detect the orientation of the pen by these. As described above, the pens of Patent Documents 1 to 4 detect the orientation of the pen with a sensor, a permanent magnet, a switch, or a pressure detector, and are not related to the display screen.
However, the input pen is used for inputting on the display screen, and it is necessary to determine whether or not the pen is in contact with the display screen.
In view of these points, the present invention can detect the orientation of the pointing unit when the pointing unit is on the display screen and can change the input mode as if using a normal writing instrument. It is an object to provide a control device and an input control method.

  In order to solve the above problems, the input control device of the present invention has a display screen, and a display unit that displays information thereon, an instruction unit that indicates an input position at an arbitrary point on the display screen, A position detection unit that is provided around the display screen and outputs a position detection signal to detect the input position; the instruction unit receives a signal detection unit that receives the position detection signal; and the instruction unit inputs And an input control unit that controls an input form on the display screen of the instruction unit based on a reception result of the signal reception unit when a position is indicated.

  Here, the instruction unit is formed in a pen shape, and at least one of the pen-shaped instruction units includes a signal receiving unit that receives a position signal for detecting an input position. Further, the input control unit controls the input form to be erased, different line width, and different color from handwritten input. The position detection unit is a light reflection method, an optical scanning method, or an optical image sensor method, and the position detection signal is light. Therefore, the signal receiving unit of the instruction unit is configured by a light receiving element.

According to another aspect of the present invention, there is provided an input control method, and in order to solve the above-described problem, a position detection signal is output from the periphery of the display screen to detect an input position from the instruction unit with respect to the display screen. A detection step; a signal receiving step for receiving the position detection signal by the instruction unit; and the display screen based on the presence or absence of the reception signal received by the instruction unit when the input unit is instructed by the instruction unit. And an input control step for controlling the above input form.
Thus, when the pointing unit is on the display screen, the direction of the pointing unit is detected, and the input mode is controlled based on the detection result, so that the input mode can be changed as if using a normal writing instrument. Can be changed.

  According to the present invention, when the pointing unit is on the display screen, the direction of the pointing unit is detected, and the input form is controlled based on the detection result, so that it is as if using a normal writing instrument. The input form can be changed.

FIG. 1 is a schematic configuration diagram of an input control apparatus according to the present invention.
The input control device of the present invention includes an instruction unit 10 made of a handwriting input pen, a coordinate input device 30 for detecting an input position of the instruction unit 10, a data processing unit 20 made of a personal computer, and a display device 40 made of, for example, a liquid crystal display device. Prepare. Further, the touch panel drive unit 35 receives the pen direction information and drives the coordinate detection light emitting unit and the light receiving unit of the coordinate input device 30. The touch panel drive unit 35 receives the pen direction information and the coordinate detection signal. The data is transmitted to the data processing unit 20.
Here, in one Embodiment of this invention, the display apparatus 40 is a large sized display apparatus provided with the display screen whose one side is 1 m or more, for example. That is, the long side is a display screen having a size of 1 m to 2 m or more, and has a very large display screen like a wall. An advertisement image of a product is displayed on such a large display screen, and materials and information images used in a conference, lecture, briefing session, workshop, etc. are displayed. The present invention is directed to the display device 40 having such a large display screen. The input control device according to the present invention is for handwriting input on the large display screen by the instruction unit.
The instructing unit 10 is formed in a pen shape, and the user holds it in his hand and inputs characters, numbers, diagrams, tables and pictures by handwriting close to the display screen. The display screen is touch-inputted to give instructions, commands, and operations. Thus, since the large display device 40 is installed so that the display screen is substantially in the vertical line direction, when inputting on the display screen by the instruction unit, when inputting above the hand of the input person, Is facing up, and when entering above the hand of the input person, it is facing down. According to the present invention, even if the pointing unit is directed upward or downward, it is possible to input with certainty. The operation of the instruction unit 10 is subjected to coordinate detection by the touch panel drive circuit 36, and the coordinate detection output is transmitted to the data processing unit 20. The data processing unit 20 detects input coordinates and displays them on the display unit 40. At the same time, the direction of the instruction unit is detected, and the input form is controlled based on the detection output.

Details of the instruction unit 10, the coordinate input device 30, the data processing unit 20, and the display device 40 will be described with reference to the block diagram of FIG.
The instruction unit 10 is formed in a pen shape so that the user can easily hold it. The instruction unit 10 includes a first photosensor 11 at one end and a second photosensor 12 at the other end. In other words, the tip of the indicator 10 is formed to be transparent, and a photodetector that receives light incident from the tip of the indicator 10 is provided. The photodetector is arranged at a position where it can receive light emitted from a light emitting element constituting a coordinate input device 30 described later.
The instruction unit 10 includes a sensor signal detection unit 13, a data processing unit 14, a transmission unit 15, and a battery 16. The sensor signal detection unit 13 detects the output of the first sensor 11 or the second sensor 12. The data processing unit 14 determines which detection output is the first sensor 11 or the second sensor 12. Based on this determination, data (direction information of the instruction unit) is stored in the internal memory 14a or 14b. The transmission unit 15 transmits the information processed by the data processing unit 14 to the data processing system 20 by light or radio waves.
When the transmission unit 15 transmits light, the light emission wavelength is preferably different from the light emission wavelength of the light emitting elements constituting the coordinate input device 30. For example, when the light emitting element of the coordinate input device emits near infrared light, the transmitter 15 uses a light emitting element that emits far infrared light. Alternatively, an infrared light emitting element is used for the coordinate input device, and a red light emitting element is used for the transmitter 15. Alternatively, when the light emitting element of the coordinate input device 30 emits continuous light, the light emitting element of the transmission unit 15 is controlled to emit light in pulses. Or you may change the pulse waveform of the light emitting element of the coordinate input device 30, and the light emitting element of the transmission part 15. FIG. Further, the coordinate input device may be infrared light or red, and the transmission unit 15 may be a radio wave.

The data processing system 20 is composed of, for example, a personal computer, and includes a CPU, ROM, RAM, keyboard, mouse, and the like. Furthermore, in order to configure the input control apparatus of the present invention, a receiving unit 21, a function selection processing unit 22, a data processing unit 23, a coordinate receiving unit 24, a drawing calculation unit 25, and a drawing storage unit 26 are provided. Each of these parts implements the input control device of the present invention by causing the CPU to read out a program stored in the ROM and sequentially causing each part to function.
The receiving unit 21 is a part that receives light or radio waves transmitted from the transmitting unit 15 of the instruction unit 10.
The function selection processing unit 22 includes a setting information storage unit 22a and a function setting unit 22b, and controls the input form on the display screen based on the reception signal of the reception unit 20. The setting information storage unit 22a is a storage unit that stores information set by the function setting unit 22b. The setting information storage unit 22a stores a case where the first light sensor 11 detects light and a case where the second light sensor 12 detects light. To do. In the case of FIG. 2, when the first optical sensor 11 detects light, it stores that “3” is set for the color, “3” for the width, and “1” for the function. When the first light sensor 12 detects light, it stores that “8” is set for the color, “6” for the width, and “1” for the function.
The function setting unit 22b uses a personal computer in advance before the input by the instruction unit 10 to detect light when the first light sensor 11 detects light and when the second light sensor 12 detects light. This is the part that sets the pen input mode. In this embodiment, using the setting table 22c, the color is black when “1” is selected, red when “2” is selected, blue when “3” is selected, green when “4” is selected, and “5”. When selected, yellow can be set, when "6" is selected, orange can be set, when "7" is selected, brown can be set, and when "8" is selected, white can be set. The pen width can be set by selecting 1, 3, 5, or 7 mm. The pen line width can be set by inputting an arbitrary pen width in addition to selecting the preset pen line width. As a function, when “1” is selected, a pen can be set, and when “2” is selected, an eraser for partially erasing can be set. Such setting of the setting table 22c is an example, and other functions can be set. For example, as another function, the linear shape may be set to a round shape or a square shape.

The data processing unit 23 is a part that processes the input position coordinates of the instruction unit 10. That is, the X coordinate information and the Y coordinate information on the display screen of the instruction unit 10 are stored in the X coordinate storage unit 23a and the Y coordinate storage unit 23b. The X coordinate information and the Y coordinate information on the display screen of the instruction unit 10 are detected by the coordinate detection unit 35 and received from the coordinate information transmission unit 36 and the coordinate information reception unit 24.
The drawing calculation unit 25 calculates drawing based on the X coordinate information and the Y coordinate information processed by the data processing unit 23. The result is stored in the drawing storage unit 26.
The drawing information stored in the drawing storage unit 26 causes the display driving unit 41 to drive the liquid crystal display unit 40.
The data processing unit 23, the drawing calculation unit 25, and the drawing storage unit 26 constitute a drawing system.

The coordinate input device 30 is a so-called tablet installed around the display screen in front of the liquid crystal display unit 40, and is configured as shown in FIG. 3, for example, to detect the coordinate position input by the instruction unit 10. The The coordinate input device 30 in FIG. 3 is a case where the resolution is horizontal 1000 × long 500. As shown in FIG. 3, light emitting elements XL = 1 to XL = 1000 are arranged on the upper end portion of the liquid crystal display device 40. These light emitting elements emit light in the direction of light receiving elements XR = 1 to XR = 1000 arranged at the lower end of the liquid crystal display device 40. In addition, a light emitting element of YL = 1 to YL = 1000 is disposed at the left end portion of the liquid crystal display device 40. These light emitting elements emit light in the direction of light receiving elements YR = 1 to YR = 1000 arranged at the right end of the liquid crystal display device 40.
The light emitting elements XL = 1 to XL = 1000 sequentially emit light, and the light receiving elements XR = 1 to XR = 1000 sequentially enter the light receiving operation state, thereby scanning the X coordinate. The light emitting elements YL = 1 to YL = 1000 emit light sequentially, and the light receiving elements YR = 1 to YR = 1000 sequentially enter the light receiving operation state to scan the Y coordinate. The light emitting elements XL and YL are infrared light emitting elements, and the light receiving elements XR and YR are preferably infrared light receiving elements. Then, when light is blocked by the instruction unit 10 while scanning the X coordinate, the X coordinate is detected as an input position of the instruction unit. Similarly, when light is blocked by the instruction unit 10 while scanning the Y coordinate, the Y coordinate is detected as the input position of the instruction unit.

  The liquid crystal display device 40 is a large display device including a display screen having at least one side of 1 m or more, for example. That is, the long side is a display screen having a size of 1 m to 2 m or more, and has a very large display screen like a wall. Instead of the liquid crystal display device 40, a display device such as a plasma display device may be used.

According to this invention comprised as mentioned above, it can be used as follows.
FIG. 4A shows Type 1 and shows that the color can be changed depending on the direction of the pen. That is, one end is color 1 (eg, black) and the other end is color 2 (eg, red).
FIG. 4B shows Type 2 and shows that it can be used in place of a pen and an eraser depending on the direction of the pen. That is, writing is performed at one end and eraser is performed at the other end. The writing color can be arbitrarily set as shown in FIG.
FIG. 4C shows Type 3 and shows that the thickness of the pen tip can be changed depending on the direction of the pen. That is, one end is thin and the other end is bold.
Further, as shown in FIG. 4D, not only the thickness of writing but also the thickness of the eraser can be changed to a large eraser and a small eraser.
In this way, the input control device of the present invention can change the function of the pen by simply holding the pen, so there is no need to select a color or eraser by clicking an icon on the screen, and a normal writing instrument can be used. The indicator can be used as if it were used.

In order to use the instruction unit as shown in FIG. 4 by the input control device configured as shown in FIGS. 2 and 3, the processing is sequentially performed as shown in the flowcharts shown in FIGS.
FIG. 5B shows a flowchart of the instruction unit 10 when the first sensor pen1 is provided at one end of the instruction unit 10 and the second sensor pen2 is provided at the other end as shown in FIG. 5A. .
When the instruction unit 10 is held by the user and brought close to the display screen and input to the tablet is started, first, in step S1, the memory 14a provided in the instruction unit 10 is initially set to “1”. Because “1” is entered, “1” is substituted. Next, in step S2, it is determined whether or not the sensor has received light. That is, when the pen is away from the tablet and light cannot be received, the sensor does not receive light, so the process returns to step S2, but when the pen receives or approaches the tablet, the process proceeds to step S3. In step S3, it is determined whether or not light is received by the first sensor pen1. If the first sensor pen1 receives light, it is determined that the pen is held in the first state, and P = 1 is set in step S4. However, if the first sensor pen1 is not receiving light, it is determined that the pen has been moved, and P = 2 is set in step S5.
Next, in step S6, it is determined whether Pn = P. That is, “1” is assigned to Pn in step S1, and if it is “1” (YES), it is determined that the pen has not been changed, and the process returns to step S2. If NO, that is, the pen has been changed, "P", that is, "2" is substituted into the memory 14a in the instruction unit 10 in step S7. Next, in step S8, information in the memory 14a is transmitted to the data processing system 20. In this way, the pen does not always transmit the direction of the pen, but transmits the information in the memory only when the pen is changed, so the power consumption of the pen can be reduced.
In step S2, when the pen moves away from the tablet and the sensor cannot receive light, and when the pen is brought close to the tablet again and the sensor receives light, the first sensor pen1 receives light again if the pen is not moved. In S3, it is determined that the pen has not been changed, and the process proceeds to step S4. However, when the pen is changed and the second sensor pen2 receives light, it is determined in step S3 that the pen has been changed, and the process proceeds to step S5. As described above, if the pen is not changed even if the pen is separated from the tablet, the operation of this flow only repeats the same process, and the process flow changes only when the pen is changed.

Next, the processing flow of the coordinate input device 30 will be described with reference to the flowchart shown in FIG.
When the coordinate input device 30 starts operation, “1” is substituted into the coordinate counter X of the coordinate input device 30 (step S11). The coordinate counter X is a counter that determines the driving order of the X coordinate light emitting element and the X coordinate light receiving element shown in FIG. Next, in step S12, X is substituted into the drive counter of the X coordinate light receiving element as a variable XR, and in step S13, X is substituted into the drive counter of the X coordinate light emitting element as variable XL. In step S14, the light emitting element XL of the X coordinate mark light emitting element is caused to emit light. In step S15, it is determined whether or not the light receiving element XR of the X coordinate mark light emitting element has received light. When light is received by the light receiving element XR, the process proceeds to step S16, and the coordinate counter is set to X = X + 1. In step S17, it is determined whether X> 1000. That is, the coordinate counter X advances to 1000, and it is determined whether or not the light emitting elements are sequentially scanned up to X = 1000. If NO, the process returns to step S12 to drive the next X coordinate light receiving element XR and X coordinate light emitting element XL. If YES, the process returns to step S11 to drive the first X coordinate light receiving element XR and light emitting element XL.
In step S15, if the light receiving element XR does not receive light, that is, if light is blocked by the pen, the process proceeds to step S18. In this way, when the light receiving element XR does not receive light, it is determined that an input has been made by the pen, and this X value is stored as an X coordinate in the X coordinate memory 23a of the data processing unit 23.

Next, in order to detect the Y coordinate, “1” is substituted into the coordinate counter Y of the coordinate input device 30 (step S19). The coordinate counter Y is a counter that determines the driving order of the Y coordinate light emitting element and the Y coordinate light receiving element shown in FIG. Next, in step S20, Y is substituted for the variable YR in the drive counter of the Y coordinate light emitting element, and in step S21, Y is substituted in the variable YL for the drive counter of the Y coordinate light emitting element. In step S22, the light emitting element YL of the Y coordinate mark light emitting element is caused to emit light. In step S23, it is determined whether or not the light receiving element YR of the Y coordinate mark light receiving element has received light. When light is received by the light receiving element YR, the process proceeds to step S24, and the coordinate counter is set to Y = Y + 1. In step S25, it is determined whether Y> 500. That is, in other words, the coordinate counter Y advances to 500, and it is determined whether or not the light emitting elements are sequentially scanned up to Y = 500. If NO, the process returns to step S20, and the next Y coordinate light receiving element YR and Y coordinate light emitting element YL are driven. If YES, the process returns to step S11 to drive the first X coordinate light receiving element XR and light emitting element XL.
If the light receiving element YR does not receive light in step S23, that is, if the light is blocked by the pen, the process proceeds to step S26. Since the light receiving element YR does not receive light, it is determined that an input has been made by the pen, and this Y value is stored in the Y coordinate memory 23b of the data processing unit 23 as the Y coordinate.
In step S27, the values of the variables X and Y are sent to the drawing calculation unit 25.

Next, the processing flow of the drawing system will be described with reference to the flowchart shown in FIG.
When the drawing system starts operation, Pn = 1 is set in step S31. Next, it is determined whether or not a pen signal is received in step S32. When the pen signal is received, the process proceeds to the next step S33, and the pen color information is acquired as the information set in the setting information storage unit 22a of the function selection processing unit 22. In step S34, the pen width information is acquired. In step S35, the function information of the pen is acquired. In step S36, it is determined whether or not the X and Y coordinate signals have been received according to the flow shown in FIG. If not received, the process returns to step S32. If a coordinate signal has been received, the drawing operation unit 25 performs drawing processing in step S37.
In this way, when the X and Y coordinate signals are received, the drawing process is performed.

Another embodiment of the present invention will be described with reference to FIG. In this embodiment, as shown in FIG. 8 (a), the sensor pen1 is provided only at one end of the instruction unit 10, and the sensor is not provided at the other end. That is, when the sensor pen1 receives light, it is detected that there is an input at one end of the instruction unit 10, and when the sensor pen1 does not receive light, the other end of the instruction unit 10 is used, or the instruction unit Is assumed to be away from the display screen. As a result, the number of sensors is reduced, the cost is reduced, and the indicating unit is lightened.
The flowchart of this embodiment is shown in FIG. 8B, which is similar to FIG. 5B, but in this embodiment, step S2 shown in FIG. 5 is omitted, and in step S42. If the sensor receives light, the process proceeds to step S43. If not received, the process proceeds to step S44, and the others are the same.
In step S42, when the pen moves away from the tablet and the sensor cannot receive light, and when the pen is brought close to the tablet again and the sensor receives light, the sensor pen1 receives light again if the pen is not moved, so in step S3 It is determined that the pen has not been changed, and the process proceeds to step S43. However, if the pen is changed and the sensor pen1 does not receive light, it is determined in step S42 that the pen has been changed, and the process proceeds to step S44. As described above, if the pen is not changed even if the pen is separated from the tablet, the operation of this flow only repeats the same process, and the process flow changes only when the pen is changed.
In step S47, pen information is transmitted, but the drawing system determines whether or not a coordinate signal has been received (step S36). When the coordinate signal is received, drawing processing is performed in step S37. However, if the pen is lifted and no coordinate signal is received, the drawing process is not executed.

The instruction unit 10 and the data processing system 20 shown in the above embodiment transmit information wirelessly like light or radio waves. However, the instruction unit 10 and the data processing system 20 are connected by wire, and information is transmitted by wire. It doesn't matter.
Further, as shown in FIG. 3, the coordinate input device 30 is configured by arranging light emitting elements and light receiving elements in the same number as the resolution, but in addition to this, for example, the reflective beam scanning method shown in FIG. 9 and the light shown in FIG. A coordinate input device such as an image sensor method may be used. The coordinate input device of FIG. 9 has a structure in which light emitting elements L and light receiving elements R are alternately arranged on the lower end side and the right end side of the liquid crystal display device, and the reflectors S are arranged on the upper end and the left end of the liquid crystal display device. . In the coordinate input device of FIG. 9, when a certain light emitting element L emits light, this light emission is reflected by the reflecting plate S at the upper end and received by the light receiving elements R on both sides of the light emitting element L. The liquid crystal display surface is scanned by sequentially moving the combination of the light emitting element L and the light receiving elements R on both sides to the next side. If the indicator A blocks light emission from the light emitting element L, reflection from the reflector S When the light receiving element R cannot receive light, the position of the light receiving element R is detected as an input position.
In the coordinate input device of FIG. 10, optical units H and K are arranged at both upper ends of the liquid crystal display screen, retroreflective plates G are arranged at the left and right ends and the lower ends, and light is emitted from the optical units H or K. When the reflected light from the retroreflective plate G is scanned by the optical unit H or K and the scanning light is blocked by the instruction unit A, the blocking position is changed to the received light output of the reflected light corresponding to the scanning angle. It is based on detection. (For example, see JP 2008-171444 A)

It is a schematic block diagram of the input control apparatus of this invention. It is a block diagram which shows the structure of the input control apparatus of this invention. It is a block diagram of the coordinate input device used for the input control apparatus of this invention. It is a figure explaining the usage example of the input control apparatus of this invention. It is a flowchart figure explaining the process of the instruction | indication part used for the input control apparatus of this invention. It is a flowchart figure explaining the process of the coordinate input device used for the input control apparatus of this invention. It is a flowchart figure explaining the process of the drawing apparatus used for the input control apparatus of this invention. It is a flowchart figure explaining the process of another instruction | indication part used for the input control apparatus of this invention. It is a figure which shows the coordinate input device of the reflected light scanning system used for this invention. It is a figure which shows the coordinate input device of the optical image sensor system used for this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Instruction part 11 1st optical sensor 12 1st optical sensor 13 Sensor signal detection part 14 Data processing part 15 Transmission part 20 Data processing system 21 Reception part 22 Function selection processing part 23 Data processing part 24 Coordinate receiving part 25 Drawing calculating part 26 Drawing storage unit 30 Coordinate input device 31, 33 Light transmission unit 32, 34 Light reception unit 35 Coordinate detection unit 36 Coordinate transmission unit 40 Liquid crystal display device 41 Display drive unit

Claims (6)

A display unit having a display screen and displaying information thereon;
An instruction unit for instructing an input position at an arbitrary point on the display screen;
A position detection unit that is provided around the display screen and outputs a position detection signal to detect the input position;
The instruction unit includes a signal receiving unit that receives the position detection signal;
An input control device comprising: an input control unit that controls an input form on the display screen of the instruction unit based on a reception result of the signal reception unit when the instruction unit indicates an input position.   The input control device according to claim 1, wherein the instruction unit is formed in a pen shape, and the signal receiving unit is provided at at least one end of the pen-shaped instruction unit.   The input control device according to claim 1, wherein the input control unit controls the input form to be erased, different line width or different color from handwritten input.   The input control device according to claim 1, wherein the position detection unit is a light reflection type, optical scanning type, or optical image sensor type coordinate input device.   The said instruction | indication part is further provided with the transmission part which transmits the reception result by the said signal receiving part, and the said input control part is further provided with the receiving part which receives the transmission signal of the said transmission part. The input control device according to item. A position detection step for outputting a position detection signal from the periphery of the display screen and detecting an instruction position from the instruction unit for the display screen;
A signal receiving step of receiving the position detection signal at the instruction unit;
An input control method comprising: an input control step for controlling an input form on the display screen based on the presence or absence of a reception signal received by the instruction unit when the input unit is instructed by the instruction unit. .