JP5393268B2 - Display device and control method thereof - Google Patents

Description

  The present invention relates to a display device and a control method thereof, and more particularly to a display device using a pen as information input means and a control method thereof in an information processing apparatus and an electronic apparatus.

  In recent years, many information processing devices, electronic devices, and the like are equipped with a pen, a mouse, or the like in combination with a keyboard as input means. When inputting information with a pen in the information processing apparatus or electronic apparatus, the apparatus or apparatus generally has a coordinate detection device (hereinafter referred to as a digitizer), and the pen position is detected by the digitizer and input with the pen. It makes work possible. In particular, in a configuration in which data display is performed using a front projector, an image based on the data is projected on a display surface, and the data is processed by pen input. At this time, the user who uses the device has both an electronic input method that does not leave a pen handwriting on the display surface and a whiteboard-based usability method in which the pen handwriting is recorded as a record on the display surface. It is convenient to be able to use the method. In using both methods, when using an electronic input pen and a writing input pen, it is necessary to change the pen according to the usage.

  On the other hand, Patent Literature 1 and Patent Literature 2 disclose techniques that improve the above-described problems in such a manner that it is not necessary to change the pen according to the usage. In Patent Document 1, there are a pen capable of electronic input and a pen capable of writing input in one pen housing. Usually, the electronic input pen is always exposed, and when the writing input pen is located inside the pen housing, the electronic input pen can be used. On the other hand, the user pushes the writing input pen from the hole that does not affect the electronic input pen in the direction of the pen tip, protrudes higher than the writing input pen, and is locked so that the writing input pen can be used. Yes. When the device is in the electronic input state while the writing input pen is in use, the member that has locked the writing input pen is removed by signal information from the external device, and the electronic input pen is again in use. Moreover, in patent document 2, the electronic input pen and the writing input pen exist in the same housing | casing, employ | adopting a knock type or a rotation type feeding mechanism, and switching a pen according to the usage.

JP2000-066839 Model registration 3033204

  However, each of the technologies described above still has the following problems. Assume that data is displayed using a front projector in a device having a function capable of using both an electronic input pen and a writing input pen. In this case, even if the user himself selects and uses the electronic input pen and the writing input pen, the data projected from the front projector, the brightness state of the display, and the like are projected regardless of the selection of the input pen. Therefore, even if the user tries to use the digitizer as a whiteboard by using the writing input pen, the projector remains projected, so the light from the projector is dazzling, and it is necessary to adjust the light amount of the projector by himself. Also, if you leave handwriting with ink etc. on the display surface with a writing input pen, the handwriting will be recognized as electronic data at the same time and the projector will project, so the handwriting will be displayed double on the display surface. It will be difficult to see.

  In view of the above problems, the present invention provides a natural, smooth, and comfortable use environment without requiring a user to adjust the display state or change settings in an information device that processes display information with an input tool. Provided is a display device and a control method thereof.

  In order to solve such a problem, the display device of the present invention includes a display surface for displaying information and inputting information according to an instruction of an input tool, and a control means for controlling display of information on the display surface. An information acquisition means for acquiring information according to instructions from both the electronic input pen for electronically inputting information and a writing input pen for leaving handwriting on the display surface; and the display surface Determining means for determining whether the pointing input pen is an electronic input pen or a writing input pen, and the control means determines that the input pen indicating the display surface is a writing input pen according to a determination result of the determining means. In this case, the amount of projection light for displaying information on the display surface is reduced.

  According to the present invention, in an information device that processes display information with an input tool, a display that can provide a natural, smooth, and comfortable use environment without requiring the user to adjust the display state or change settings. An apparatus and a control method thereof can be provided. That is, when the input tool uses the electronic input pen and when the writing input pen is used, the display device automatically sets the amount of light and the display content to be displayed, so the user can bother adjusting the display device. There is no need to change settings.

  Also, if you leave a handwriting with ink etc. on the display surface with a writing input pen, if the handwriting is recognized and projected as electronic data, it will be double-displayed on the display surface and will be very difficult to see . To avoid this, images based on handwriting data are not displayed at the time of projection, and the images based on the data are displayed when the handwriting is erased. Can be realized.

  In addition, according to the present invention, the electronic input pen and the writing input pen are further arranged in the same housing to achieve the same function. Therefore, it is bothersome to change the pen or worry about where to place the input pen that is not used. Can be eliminated.

It is a schematic diagram which shows the structural example of the display apparatus of this embodiment. It is a figure which shows the structural block example of the display apparatus of this embodiment. It is a figure which shows the structural example of the electronic input pen which inputs the coordinate information electronically which is one input tool of Embodiment 1. FIG. FIG. 3 is a diagram illustrating a configuration example of a writing input pen that is the other input tool of the first embodiment. FIG. 3 is a diagram illustrating a configuration example of an erasing pen according to the first embodiment. It is a figure which shows the example of light quantity control in case the handwriting is input from the display surface with the electronic input pen 1 of Embodiment 1. FIG. It is a figure which shows the example of light quantity control in case the handwriting is input from the display surface with the writing input pen 4 of Embodiment 1. FIG. 4 is a flowchart illustrating an example of a procedure for controlling the light amount of the front projector by the input vent according to the first embodiment. FIG. 10 is a diagram illustrating an example of projection when the writing input pen 4 of the second embodiment is outside the display area of the projection light 10. FIG. 6 is a diagram illustrating an example of projection when the writing input pen 4 of the second embodiment is within a display area of projection light 10. FIG. 10 is a diagram illustrating another example of projection when the writing input pen 4 of the second embodiment is within the display area of the projection light 10. FIG. 10 is a diagram illustrating an example of projection when handwriting by the writing input pen of the second embodiment is not erased and the writing input pen 4 is outside the display area of the projection light 10. FIG. 10 is a diagram illustrating an example of projection when handwriting by the writing input pen according to the second embodiment is erased and the writing input pen 4 is outside the display area of the projection light 10. 10 is a flowchart illustrating an example of a procedure for controlling the light amount of the front projector by the input vent according to the second embodiment. It is a figure which shows the structural example of the input pen by which the electronic input pen 1 and the writing input pen 4 of Embodiment 3 are arrange | positioned in the same housing | casing. It is the figure which expanded the pen tip in case the input pen of Embodiment 3 is used as an electronic input pen. It is the figure which expanded the pen tip in case the input pen of Embodiment 3 is used as a writing input pen.

  Hereinafter, embodiments of the display device of the present invention will be described in detail with reference to the accompanying drawings.

[Embodiment 1]
<Configuration Example of Display Device of Present Embodiment> FIG. 1A is a schematic diagram illustrating a configuration example of a display device of the present embodiment. In FIG. 1A, 6 is a display body that also serves as a digitizer that is a coordinate input device. 7 is a personal computer (hereinafter referred to as a personal computer) that performs projection control for controlling the front projector 8 based on the type and position of the input pen as well as information acquisition for acquiring handwriting information based on coordinate input from the display unit 6. is there. The personal computer 7 also projects an image created by the user on the personal computer 7 by the front projector 8. Reference numeral 8 denotes a front projector, which projects an image based on data created by the user in accordance with an instruction from the personal computer 7 or a handwriting based on a coordinate input input via a digitizer of the display body 6 onto the display body 6.

  Reference numeral 1 (4) denotes an electronic input pen, a writing input pen, or an input tool having both functions. Reference numeral 9 denotes a display surface of the display body 6. The display surface 9 functions as a digitizer, also functions as a writing surface that holds handwriting by the writing input pen 4, and also functions as a screen of the front projector 8. Reference numeral 19 denotes an input determination sensor for determining whether the input tool 1 is an electronic input or a writing input. Reference numerals 20 and 21 denote coordinate detection sensors that detect input coordinates to the display surface 9 by the input tool 1. Such an input coordinate sequence is recognized as handwriting by the personal computer 7.

  Here, a method of detecting input coordinates will be described with reference to FIG. 1A. First, the light projecting means (not shown) provided in each of the coordinate detection sensors 20 and 21 projects infrared rays along the display surface 9. Infrared light projected by the light projecting means is retroreflected by a retroreflecting plate provided at the corner of the input surface, and the retroreflected light is received by light receiving means (non-detecting means) provided in each of the coordinate detection sensors 20, 21. Detected). In this state, by touching the display surface 9 using an input tool, the above-described optical path is blocked, and by detecting the direction in which the optical path is blocked by the respective coordinate detection sensors 20, 21, It is possible to geometrically detect the position indicated by the input tool. Further, the input tool is provided with a signal transmitter. And the identification information (input tool ID) of the input tool, the state of the pen tip switch that operates when the pen tip of the input tool presses the display surface 9 (ON / OFF), or various switches provided on the input tool Means information can be transmitted. Therefore, if the communication in the signal generator is, for example, infrared communication, the information can be obtained by the input discrimination sensor 19 having infrared receiving means.

<Example of Configuration Block of Display Device of Present Embodiment>
FIG. 1B is a diagram illustrating a configuration block example of the display device of the present embodiment. In addition, the same reference number is attached | subjected to the component similar to FIG. 1A.

  Based on the signal from the input tool 1, the personal computer 7 receives, via the digitizer interface 77, a determination signal indicating whether it is an electronic input or a writing input in the input determination sensor 19. Further, the personal computer 7 receives, via the digitizer interface 77, received signals at the coordinate detection sensors 20 and 21, which determine contact coordinates on the surface of the display surface 9 by the input tool 1 (4). On the other hand, the personal computer 7 transmits data corresponding to the image to be displayed to the front projector 8 via the projector interface 78. Further, the personal computer 7 transmits a light amount control signal for instructing the light amount based on the arrangement area of the input tool 1 to the front projector 8 via the projector interface 78. Since other control signals via the digitizer interface 77 and other control signals via the projector interface 78 are not the main control of the present application, description thereof will be omitted.

  The personal computer 7 includes a CPU 71 for calculation control, a ROM 72 for storing fixed programs and data, an input unit 75 including a keyboard and a mouse, and an output unit 76 including a display unit. The personal computer 7 also has a RAM 73 that is used as a temporary work memory when the CPU 71 executes a program, and an external storage unit 74 that is a nonvolatile storage such as a disk.

  The RAM 73 has the following storage areas. It has a storage area for an input determination flag 73a which is an input determination result of the input tool 1 (4) currently used by the user, based on a signal from the input determination sensor 19. It has a storage area for pen coordinates 73b which are coordinates on the display surface 9 with which the input tool 1 is in contact. A storage area for projector display data 73c corresponding to an image to be displayed on the front projector 8 is provided. It has a storage area for handwriting data 73 d input to the display surface 9 by the input tool 1. As will be described in detail below, the projector display data 73c and the handwriting data 73d are displayed in an overlapping manner corresponding to the input determination result of the input tool 1 currently used by the user and the state of the handwriting, or the projector display data 73c. Only displayed or separated. It has a storage area for the projector light quantity 73e which is the light quantity of the front projector 8 corresponding to the input discrimination result of the input tool 1 currently used by the user and the arrangement area of the input tool 1. It has a storage area for designated area information 73f which is a designated area on the display surface 9 where the input tool 1 is currently positioned by the user. A program load area 73g for loading a program executed by the CPU 71 from the external storage unit 74 is provided.

  The external storage unit 74 has the following storage areas. A storage area of a projector display file 74a corresponding to an image to be displayed on the front projector 8 is provided. A part of the projector display file 74a is stored in the projector display data 73c. A storage area for a projector display program 74b for controlling display on the front projector 8 is provided. The pen input program 74c includes a storage area for a pen input program 74c for controlling input by the input tool 1. The pen input program 74c includes input discrimination from the input tool 1 and input of pen coordinates. For example, a pen coordinate calculation routine for calculating pen input coordinates is also included in the pen input program 74c. It has a storage area for a light quantity control program 74d for controlling the light quantity of the front projector 8 based on the input discrimination from the input tool 1 and the arrangement area of the present application.

  Note that the storage areas of the RAM 73 and the external storage unit 74 are part of the essential part of the present application, and other general-purpose programs and data areas are omitted in order to avoid complexity.

<Example of Configuration of Input Pen of First Embodiment>
(Example of Electronic Input Pen) FIG. 2A is a diagram illustrating a configuration example of an electronic input pen that electronically inputs coordinate information, which is one input tool of the first embodiment. In FIG. 2A, 1 is an electronic input pen, and 2 is an electronic input pen tip, and physical handwriting such as ink cannot be left on the display surface. However, coordinates are detected by the coordinate detection sensors 20 and 21 shown in FIG. 1A. It has come to recognize as. Reference numeral 3 denotes a signal transmitter that transmits a signal that allows the input determination sensor 19 to determine that it is the electronic input pen 1.

  (Example of Writing Input Pen) FIG. 2B is a diagram illustrating a configuration example of a writing input pen which is the other input tool of the first embodiment. In FIG. 2B, 4 is a writing input pen, and 5 is a writing input pen tip, which can leave a physical handwriting on the display surface with ink or the like. The coordinate detection sensors 20 and 21 shown in FIG. recognize.

  (Example of Erase Pen) FIG. 2C is a diagram illustrating a configuration example of the erase pen. 2C, reference numeral 101 denotes an erasing pen, 102 denotes an erasing pen tip, and 103 denotes a signal transmitter, which transmits a signal that allows the input determination sensor 19 to determine that it is the erasing pen 101.

  <Example of Light Control of Front Projector Corresponding to Input State of Embodiment 1> The three input tools can be used properly according to the user's application, and the display device of the present application also has a function corresponding thereto. It also has a lineup. The input determination sensor 19 determines which of the electronic input pen 1, the writing input pen 4, and the erasing pen 101 is used. For example, if the input determination sensor 19 detects no signal, the input determination sensor 19 determines that the pen is a four-writing input pen, and receives signals emitted from the signal transmitters 3 and 103. It is determined whether it is an erase pen.

  (Light quantity control in case of electronic input pen) FIG. 3 is a diagram showing an example of light quantity control in the case where handwriting is input from the display surface with the electronic input pen 1. FIG. Elements similar to those in FIGS. 1A and 2A are denoted by the same reference numerals, and description thereof is omitted. In FIG. 3, 10 is projection light, and 11 is display data in the projection light. First, referring to FIG. 3, the user intends to input from the display surface 9 using the electronic input pen 1. At this time, the signal from the signal transmitter 3 in FIG. 2A is received by the input determination sensor 19 in FIG. 1A, and it is determined that the personal computer 7 is an electronic input pen. Then, an instruction is issued from the personal computer 7 to the front projector 8, and the projection light 10 is controlled to be projected in a standard state.

(Light intensity control for writing input pen)
FIG. 4 is a diagram illustrating an example of light amount control when a handwriting is input from the display surface with the writing input pen 4. Elements similar to those in FIGS. 1A, 2B, and 3 are denoted by the same reference numerals, and description thereof is omitted. In FIG. 4, reference numeral 12 denotes ink handwriting written with the writing input pen 4. In FIG. 4, the user uses the writing input pen 4 to use the display surface 9 like a whiteboard. At this time, since the input determination sensor 19 of FIG. 1A does not receive a signal, the personal computer 7 determines that it is a writing input pen. Then, an instruction is issued from the personal computer 7 to the front projector 8, and the projection light 10 is controlled so as to reduce the amount of light until it is not dazzled without illuminating the user.

  <Procedure Example of Front Projector Light Control by Input Ben of First Embodiment> Next, a procedure example of front projector light control by the input vent of the first embodiment will be described using the flowchart of FIG. The flowchart in FIG. 5 corresponds to the pen input program 74c and the light amount control program 74d in FIG. 1B and is executed by the CPU 71.

  When the power is turned on, an initial setting operation is started in S1, and the position can be detected by the input tool. In S2, the presence / absence of input by an input tool or the like is determined. When an input is detected in S2, it is determined in S3 which input tool is used for input. In the case of input using the electronic input pen 1 or the erasing pen 101, the information is obtained via the communication means 3 (103). In addition, in the case of using the writing input pen 4, since the information cannot be obtained, it is possible to distinguish between the two. According to the result of S3, in the case of input by the writing input pen 4, in S4, an instruction is issued from the personal computer 7 to the front projector 8, and the light amount of the projection light 10 is lowered to a state where it is not dazzling without illuminating the user, or The display device is turned off and the process returns to S2. On the other hand, when the electronic pen 1 or the erasing pen 101 is operated, in S5, if the light amount is reduced in S4 described above, the return processing is performed so that the display in the standard state can be performed. If the amount of light is not reduced in S4 described above, the display in the standard state is maintained. If there is no input in S2, after measuring whether or not a predetermined time has passed in S6, if not, the process returns to S2. In S6, it is measured how much time has passed in S2. When a predetermined time elapses in S6, the display in the standard state is held in S5. You may comprise so that a display may be returned to a standard state, when predetermined time passes since the end of the writing with the writing input pen 4 by S4 (at this time, a display means is a brightness | luminance reduction state) end.

[Embodiment 2]
<Configuration Example of Display Device of Second Embodiment> The configuration of the display device in the second embodiment is basically the same as the configuration of the first embodiment (FIGS. 1A, 1B, 2A, 2B, and 2C). So avoid duplication.

  <Example of Light Control of Front Projector Corresponding to Input State of Second Embodiment> An operation example of the display device of the second embodiment will be described with reference to FIGS. 6 to 10, the same reference numerals as those in FIG. 1A, FIG. 3, and FIG. 4 of the first embodiment indicate the same components.

  (When Writing Input Pen is Outside Projection Range) FIG. 6 is a diagram illustrating an example of projection when the writing input pen 4 is outside the display area of the projection light 10. In FIG. 6, 11 and 13 are images showing projection data in the projection light. In FIG. 6, the writing input pen 4 is located outside the display area of the projection light 10. In this case, even when the writing input pen 4 is used, when the writing input pen 4 is located outside the display area, the projection light 10 from the front projector 8 is accompanied by the projection data 11 and 13 in the projection light 10. Projected onto the display surface 9.

  (Example when Writing Input Pen is in Projection Range) FIG. 7 is a diagram showing an example of projection when the writing input pen 4 is in the display area of the projection light 10. In FIG. 7, reference numeral 12 denotes ink handwriting written with a writing input pen. In FIG. 7, when the writing input pen 4 is positioned within the display area, the input device determination sensor 19 in FIG. 1A detects no signal, and determines that the personal computer 7 is the writing input pen 4. At the same time, the coordinate detection sensors 20 and 21 shown in FIG. 1A recognize that the writing input pen 4 is located within the display area. At that time, the front projector 8 reduces (downs) the amount of the projection light 10 in accordance with a command from the personal computer 7. Although FIG. 7 illustrates a case where the light amount is cut, the present invention is not limited to this. Further, the data of the ink handwriting 12 written with the writing input pen 4 is also recognized by the coordinate detection sensors 20 and 21 shown in FIG. 1A and stored in the personal computer 7.

  (Another example when the writing input pen is within the projection range) FIG. 8 is a diagram illustrating another example of the projection when the writing input pen 4 is within the display area of the projection light 10. Reference numeral 14 in FIG. 8 denotes ink handwriting written with a writing input pen, and reference numeral 10a denotes projected light after the amount of light in the designated area is reduced (down). 8 is partially different from FIG. When the writing input pen 4 is located in the display area, the input device determination sensor 19 in FIG. 1A detects no signal, and the personal computer 7 determines that the writing input pen 4 is used. At the same time, the coordinate detection sensors 20 and 21 shown in FIG. 1A recognize that the writing input pen 4 is located within the display area. At that time, the front projector 8 reduces the amount of light in the display area designated by the user around the writing input pen 4 in response to a command from the personal computer 7. In the case of FIG. 8, the light amount is cut in a half of the display area including the writing input pen 4, but the present invention is not limited to this. Further, the data of the ink handwriting 14 written with the writing input pen 4 is also recognized by the coordinate detection sensors 20 and 21 shown in FIG. 1A. The projection light 10a that has not been reduced in light amount as shown in FIG. 8 is projected with the projection data 11 in the projection light.

  (Example in which handwriting by writing input pen of FIGS. 7 and 8 is not erased) FIG. 9 shows that the writing input pen of FIGS. 7 and 8 is not erased and the writing input pen 4 is outside the display area of the projection light 10. It is a figure which shows the example of the projection in the case of being. As shown in FIG. 9, when the writing input pen 4 is located outside the display area, the light amount in the area where the light amount is reduced in FIGS. 7 and 8 is restored. At this time, in FIG. 9, since the data of the ink handwritings 12 and 14 are not projected and displayed, double display of the ink handwriting and the data display of the handwriting can be avoided. The data of the ink handwriting 12 and 14 is stored in a storage location different from the storage location of other electronic data, and the ink handwriting 12 is displayed even when other electronic data is projected and displayed by the processing of the personal computer 7. , 14 so that the data projection display is not performed.

  (Example in which handwriting by writing input pen of FIG. 7 and FIG. 8 is erased) FIG. 10 shows the handwriting by the writing input pen of FIG. 7 and FIG. 8 being erased, and the writing input pen 4 is outside the display area of the projection light 10. It is a figure which shows the example of projection in a certain case. Reference numerals 15 and 16 in FIG. 10 denote projection data in the projection light 10. As shown in FIG. 10, when the ink handwriting 12, 14 is erased by the erasing pen 101, it is recognized by the coordinate detection sensors 20, 21 shown in FIG. 1A, and the personal computer 7 replaces the projection data 15, 16 with the projection light 10. . The erasing position is detected by the erasing method using the erasing pen 101 in the same manner as the position detecting method described above.

  <Procedure Example of Front Projector Light Control by Input Ben of Second Embodiment> Next, a procedure example of front projector light control by the input vent of the second embodiment will be described using the flowchart of FIG. The flowchart in FIG. 11 corresponds to the pen input program 74c and the light amount control program 74d in FIG. 1B and is executed by the CPU 71.

  First, S17 is a start. In S18, the initial setting operation is started, and the position can be detected by the input tool. In S19, it is determined whether or not there is an input by an input tool or the like. Here, if an input by an input tool or the like is not detected, S19 is repeated, and if an input is detected, an input tool by which input is input is determined at S20. In the case of input by the electronic input pen 1, the information is obtained via the signal transmitter 3, and the electronic input pen 1 is determined. In step S21, the data stored in the electronic data storage location is updated. In S22, the data stored in the storage location of the electronic data is displayed, and the process returns to S19.

  On the other hand, if it is not the input by the electronic input pen 1 in S20, it is determined whether or not the input is the writing input pen 4 in S23. When the input is not the writing input pen 4, the information is obtained via the signal transmitter 103 and is determined to be the erasing pen 101. When the handwriting is erased using the erasing pen 101, the data to be erased is deleted from the handwriting data storage location and stored in the electronic data storage location in S24. In S25, the data at the storage location of the writing data is not displayed, the data at the storage location of the electronic data is displayed, and the processing returns to S19.

  Further, in the case of input by the writing input pen 4 in S23, since the information of the signal transmitter 3 (103) cannot be obtained, it is determined that the input is the writing input pen 4. In this case, if it is detected in S26 that the writing input pen 4 is within the display area, the luminance (light quantity) of the display is reduced in S27. Alternatively, the brightness (light quantity) of the display area specified by the user is reduced. In S28, the input handwriting data is stored in the handwriting data storage location, and the process returns to S19.

  In S26, when it is determined that the writing input pen 4 is not located within the display area, the brightness of the display whose brightness (light quantity) has been reduced is returned in S29. The handwriting data input in S30 is stored in the handwriting data storage location, the handwriting data stored in the handwriting data storage location is hidden, the electronic data storage location data is displayed, and the process returns to S19.

[Embodiment 3]
In the first and second embodiments, the example in which the electronic input pen 1 and the writing input pen 4 are provided separately has been described. In the third embodiment, an example of an input pen in which the electronic input pen 1 and the writing input pen 4 are arranged in the same casing will be described. In addition, since control of the light quantity and display data of the front projector 8 at the time of using the input pen of this Embodiment 3 is the same as that of Embodiment 1 or 2, duplication is avoided.

  FIG. 12 is a configuration example of the input pen of this embodiment in which the electronic input pen 1 and the writing input pen 4 are arranged in the same housing. FIG. 13A is an enlarged view of the pen tip when the input pen is used as an electronic input pen. FIG. 13B is an enlarged view of the pen tip when the input pen is used as a writing input pen. In the figure, 22 is a pen housing, 22a is a pen tip support section, 23 is a pen tip having both an electronic input pen and a writing input pen, 24 is a writing input pen tip, and 25 is an electronic input pen tip. It is. Further, 26 is a signal transmitter, 27 is a pen tip locking member, 28 is an input tool discrimination switch, and 29 is a pen tip rotating shaft. A pen tip 23 having a pen tip 24 for writing input pen and a pen tip 25 for electronic input is rotatable about a pen tip rotation shaft 29. When the user selects the pen tip according to the state of use of the pen tip, the input tool discriminating switch 28 is pressed at the same time as the pen tip lock 27 is locked, and the discriminated signal is transmitted from the signal transmitter 26. Is done.

[Other Embodiments]
In the present embodiment, the coordinate input by the input pen is configured by a digitizer having a sensor that detects the shielding of infrared rays. However, the present invention can also be applied to configurations including other coordinate detection methods. It is included in the present invention. Further, although the case where the projection onto the display surface is a front projector has been described, the same applies to a rear projector, a liquid crystal panel, a PDP, and the like, and these are also included in the present invention.

  In addition, the present invention may be applied to a system composed of a plurality of devices, or may be applied to an apparatus composed of a single device. For example, the projector may have a personal computer function. The present invention can also be achieved by supplying a software program for realizing the functions of the above-described embodiments directly or remotely to a system or apparatus. Then, a computer included in the system or the like reads and executes the supplied program code. Accordingly, since the functions and processes of the present invention are implemented by a computer, the program code itself installed in the computer also implements the present invention. That is, the computer program itself for realizing the functions and processes is also one aspect of the present invention. The computer program is stored in a ROM or RAM as a storage medium and executed by the CPU. In addition, it is loaded into the RAM from an external storage medium such as a disk or CD and executed by the CPU.

  DESCRIPTION OF SYMBOLS 1 ... Electronic input pen, 2 ... Electronic input pen tip, 3 ... Signal transmitter, 4 ... Writing input pen, 5 ... Writing input pen tip, 101 ... Erase pen, 102 ... Erase pen tip, 103 ... Signal transmitter, 6 DESCRIPTION OF SYMBOLS ... Display body, 7 ... PC, 8 ... Front projector, 9 ... Display surface, 10 ... Projection light, 10a ... Projection light after light amount is partially reduced in specified area, 11 ... Projection data in projection light, 12 ... Writing Ink handwriting written with an input pen, 13 ... projection data in projection light, 14 ... ink handwriting written with a writing input pen, 15 ... projection data in projection light, 16 ... projection data in projection light, 19 ... input Discriminating sensor for tools, 20, 21 ... Coordinate detection sensor, 22 ... Pen housing, 22a ... Pen tip support, 23 ... Pen tip having both means for electronic input pen and writing input pen, 24 ... Pen tip for writing input 25 ... electronic input nib, 26 ... signal transmitter, 27 ... nib locking, 28 ... input device discrimination switch 29 ... nib rotation axis

Claims (10)

A display device having a display surface for displaying information and inputting information according to an instruction of an input tool, and a control means for controlling display of information on the display surface,
Information acquisition means for acquiring information in accordance with instructions from both the electronic input pen for electronically inputting information and the writing input pen for leaving a handwriting on the display surface;
Determining means for determining whether the input pen that indicates the display surface is an electronic input pen or a writing input pen;
The control means reduces the amount of projection light that displays information on the display surface when the input pen that indicates the display surface is determined to be a writing input pen according to the determination result of the determination means. Display device. The control means includes
If the input pen that indicates the display surface is determined to be an electronic input pen according to the determination result of the determination means, add handwriting by the electronic input pen that indicates the display surface to the information displayed on the display surface,
When the input pen that indicates the display surface is determined to be a writing input pen according to the determination result of the determining means, the handwriting by the writing input pen that indicates the display surface is not added to the information displayed on the display surface The display device according to claim 1, wherein the display device is controlled as follows.   The control means, when the handwriting by the writing input pen is erased, controls to add the handwriting by the writing input pen instructing the display surface to the information displayed on the display surface. Item 3. The display device according to Item 2. A determination means for determining an area of the display surface indicated by the input pen;
The control means includes at least control of the amount of projection light displayed on the display surface and whether or not to add handwriting by an input pen that indicates the display surface in the display surface area determined by the determination means. 4. The display device according to claim 1, wherein any one of the controls is performed.   The display device according to claim 1, wherein the electronic input pen and the writing input pen are arranged in the same casing. The display surface functions as a digitizer that detects coordinates of the display surface indicated by the input pen, a writing surface that holds handwriting by the writing input pen, and a screen that displays information projected by the front projector,
6. The computer according to claim 1, wherein the control unit includes a computer that receives a signal detected by a detection sensor on the display surface and controls information projected onto the front projector and a light amount to be projected. The display device according to any one of the above. A display device control method comprising: a display surface for displaying information and inputting information according to an instruction of an input tool; and a control means for controlling display of information on the display surface,
An information acquisition step of acquiring information according to an instruction of any of the electronic input pen for electronically inputting information and the writing input pen for leaving a handwriting on the display surface;
A determination step of determining whether the input pen that indicates the display surface is an electronic input pen or a writing input pen;
A light amount reduction step of reducing the amount of projection light for displaying information on the display surface when the input pen that indicates the display surface is determined to be a writing input pen according to the determination result of the determination step. A display device control method. When the input pen that indicates the display surface is determined to be an electronic input pen according to the determination result of the determination step, a handwriting by the electronic input pen that indicates the display surface is added to the information displayed on the display surface, When the input pen that indicates the display surface is determined to be a writing input pen according to the determination result of the determination step, the handwriting by the writing input pen that indicates the display surface is not added to the information displayed on the display surface. Step to control, and
And further comprising a step of controlling to add a handwriting by the writing input pen instructing the display surface to information displayed on the display surface when the handwriting by the writing input pen is erased. Item 8. A display device control method according to Item 7.   The program for making a computer perform each step of the control method of the display apparatus of Claim 7 or 8.   A computer-readable storage medium storing the program according to claim 9.

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