JP2014186087A - Projector system, projector, and control method of projector system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a projector system capable of preventing omission of battery replacement when a remaining battery capacity of an electronic pen for drawing on a projection surface of a projector reduces.SOLUTION: When control means 40D of an electronic pen 40 detects that a remaining battery capacity reduces (a step S203:Y), the control means 40D causes notification means 40C to perform first notification (a step S204).

Description

  The present invention relates to a projector system, a projector, and a control method for the projector system.

  Conventionally, an image based on an image signal output from a computer or the like is displayed on a screen or the like by a display device such as a projector, and the display device detects a user operation performed on a projected image using an electronic pen. There has been proposed an electronic blackboard system (interactive system) that generates and displays an image based on information related to (user) operation (for example, Patent Document 1).

JP 2011-140154 A

  In an apparatus such as Patent Document 1, since the electronic pen is operated by a battery, operation input cannot be performed when the remaining battery level is low. There is a method of providing an electronic pen with a notification device for notifying a decrease in the remaining battery level. However, since the projected image is watched, there is a case where the remaining amount notification is not noticed. Also, even if the user notices a low battery level notification, he / she may continue to use the battery after replacing the battery and forget it when the power is turned off. For this reason, there has been a demand for a projector system that can prevent forgetting to replace the battery when the battery level of the electronic pen decreases.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

  Application Example 1 A projector system according to this application example includes a projector that projects an image, and an electronic pen for drawing on a projection surface on which the image is projected, the projector and the projector At least one of the electronic pens includes a notification unit that notifies that the battery level of the electronic pen is low.

  According to this application example, when the battery level of the electronic pen for drawing on the projection surface is low, at least one of the projector and the electronic pen notifies the notification unit, so the low battery level notification of the electronic pen is used. It is possible to prevent the person from overlooking.

  [Application Example 2] In the projector system according to the application example described above, the electronic pen includes the notification unit, and the notification unit included in the electronic pen has a second function when the battery level of the electronic pen is low. It is preferable to perform 1 notification.

  According to this application example, when the battery level of the electronic pen decreases, the notification unit provided in the electronic pen performs the first notification, so that the user needs to replace the battery without disturbing the projection screen. Can be notified.

  Application Example 3 In the projector system according to the application example described above, the notification unit included in the electronic pen is a case where the battery level of the electronic pen is low, and the power of the projector is turned off. At this time, it is preferable to perform a second notification different from the first notification.

  According to this application example, when the power of the projector is turned off in a state where the battery level of the electronic pen is low, the second notification different from the first notification is performed. For example, in the first notification, an LED (Light emitting diode) display is given so as not to hinder pen operation, and in the second notification in a state where the projector is turned off and the use is finished, the buzzer sound is stronger. It is possible to notify and prompt battery replacement.

  Application Example 4 In the projector system according to the application example, it is preferable that the projector includes the notification unit.

  According to this application example, when the battery level of the electronic pen decreases, the notification unit provided in the projector notifies. Accordingly, even when the user looks away from the electronic pen and looks at the projection screen of the projector, it is possible to prevent the user from overlooking the notification of the remaining battery level of the electronic pen.

  Application Example 5 In the projector system according to the application example described above, when the battery level of the electronic pen is low, the notification unit included in the projector may turn off the electronic power when the projector is turned off. It is preferable to project a pen battery low message.

  According to this application example, when the projector is turned off in a state where the battery level of the electronic pen is low, the notification unit included in the projector projects the battery level low message of the electronic pen. It is possible to notify the battery remaining low and prompt the user to replace the battery.

  Application Example 6 In the projector system according to the application example described above, when the notification unit included in the projector is turned on, when the battery power of the electronic pen is reduced when the power is turned off last time. It is preferable to project a battery replacement confirmation message for the electronic pen.

  According to this application example, when the power of the projector is turned on, the battery replacement confirmation message is projected when the battery level of the electronic pen is low during the previous use. It is possible to prompt the user to confirm whether the battery has been replaced.

  Application Example 7 A projector according to this application example receives an operation of an electronic pen for drawing on a projection surface on which an image is projected, and projects the image, and the battery level of the electronic pen is low. It is provided with the alerting | reporting part which alert | reports that it has fallen.

  According to this application example, when the battery level of the electronic pen decreases, the notification unit provided in the projector notifies. Accordingly, even when the user looks away from the electronic pen and is gazing at the projection screen of the projector, it is possible to prevent the user from overlooking the notification of the remaining battery level of the electronic pen.

  Application Example 8 A projector system control method according to this application example is a control method of a projector system that includes a projector that projects an image and an electronic pen that draws on the projection surface on which the image is projected. A remaining amount acquisition step of acquiring the remaining battery level of the electronic pen, and at least one of the projector and the electronic pen when the remaining battery level acquired by the remaining amount acquisition step is equal to or less than a predetermined value. And an informing step.

  According to this application example, the battery remaining amount of the electronic pen is acquired by the remaining amount acquisition step, and if the acquired battery remaining amount is a predetermined value or less, at least one of the projector or the electronic pen is notified by the notification step. Therefore, it is possible to prevent the user from overlooking the decrease in the battery level of the electronic pen.

FIG. 3 is a diagram illustrating a usage state of the projector system according to the embodiment. The external view of an electronic pen. The block diagram which shows the circuit structure of a projector system. The flowchart which shows operation | movement of a projector. The flowchart which shows operation | movement of an electronic pen. The figure which shows the alerting | reporting image which a projector alert | reports (projects), a battery remaining low message, and a battery replacement confirmation message.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. However, the following embodiment does not limit the invention according to the scope of claims, and all combinations of features in the embodiment are based on the invention. It is not always essential to the solution.

(Embodiment)
The projector system according to the present embodiment modulates light emitted from a light source according to image information, and projects an image on a projection surface such as a screen via a projection lens, and draws characters or figures on the projection surface. And an electronic pen.

FIG. 1 is a schematic diagram illustrating a projector system 100 according to the present embodiment.
As shown in FIG. 1, in the projector system 100, the projector 1 is suspended from a user H, and the user H performs a drawing operation using the electronic pen 40 on a screen SC on which the projector 1 projects an image. In the projector 1, pen operation detection means 25 (see FIG. 3) described later detects operation information such as position information of the electronic pen 40. Then, the projector 1 combines drawing data based on the drawing operation of the electronic pen 40 with the image information and projects it on the screen SC as a projection plane.

FIG. 2 is an external view of the electronic pen 40.
As shown in FIG. 2, the electronic pen 40 is housed in a pen-shaped housing 40A having a sharp tip, and includes a pen tip switch 40B at the tip of the housing 40A and a notification means 40C at the body portion of the housing 40A. .
The housing 40A includes a control unit 40D for controlling the operation of the electronic pen 40, a communication unit 40E for communicating with the projector 1, and a power supply unit 40F for supplying power to the electronic pen 40.

FIG. 3 is a block diagram illustrating a circuit configuration of the projector system 100 according to the present embodiment.
As shown in FIG. 3, the projector 1 includes an image input terminal 6, an image projection unit 10, an OSD processing unit 16, an image signal processing unit 17, an image signal input unit 18, a control unit 20, a storage unit 21, and a light source control unit 22. The input operation means 23, the pen operation detection means 25, the communication means 26, the power supply terminal 30, the power supply unit 31 and the like are housed inside or outside the housing of the projector 1 (not shown).

  The image projection means 10 includes a light source 11, three liquid crystal light valves 12R, 12G, and 12B as light modulation devices, a projection lens 13 as a projection optical system, a liquid crystal drive means 14, and the like. The image projection unit 10 modulates the light emitted from the light source 11 with the liquid crystal light valves 12R, 12G, and 12B and projects the light from the projection lens 13 to display an image on a screen SC or the like as a projection surface.

The light source 11 includes a discharge-type light source lamp 11a made of an ultra-high pressure mercury lamp, a metal halide lamp, or the like, and a reflector 11b that reflects light emitted from the light source lamp 11a toward the liquid crystal light valves 12R, 12G, and 12B. ing.
Light emitted from the light source 11 is converted into light having a substantially uniform luminance distribution by an integrator optical system (not shown), and red (R), green (G), and blue, which are the three primary colors of light, by a color separation optical system (not shown). After being separated into each color light component of (B), it enters the liquid crystal light valves 12R, 12G, and 12B, respectively.

The liquid crystal light valves 12R, 12G, and 12B are configured by a liquid crystal panel in which liquid crystal is sealed between a pair of transparent substrates. In the liquid crystal light valves 12R, 12G, and 12B, a plurality of pixels (not shown) arranged in a matrix are formed, and a driving voltage can be applied to the liquid crystal for each pixel.
When the liquid crystal driving unit 14 applies a driving voltage corresponding to the input image information to each pixel, each pixel is set to a light transmittance corresponding to the image information. Therefore, the light emitted from the light source 11 is modulated by passing through the liquid crystal light valves 12R, 12G, and 12B, and image light corresponding to image information is formed for each color light.
The formed image light of each color is synthesized for each pixel by a color synthesis optical system (not shown) to become color image light, and then enlarged and projected onto the screen SC or the like by the projection lens 13.

  In the present embodiment, the projector 1 that projects using the light source lamp 11a as the light source 11 is exemplified, but the present invention can also be applied to a projector that projects using an LED light source or a laser light source as the light source.

  In the present embodiment, the image projection means 10 is exemplified by a transmissive liquid crystal type projection optical system using three liquid crystal light valves 12R, 12G, and 12B, but a reflective liquid crystal display method or a micromirror device method ( A light modulation device of another display method such as a light switch display method may be employed.

  The image signal input means 18 receives image information from a plurality of image input terminals 6 from an external image output device such as a video reproduction device or a personal computer via a cable (not shown) or a communication device. The input image information is output to the image signal processing unit 17 based on an instruction from the control unit 20. Note that the image signal input unit 18 may include a receiving unit for wireless communication, optical communication, or the like, and input an image signal wirelessly from an external device.

  The image signal processing unit 17 converts the image information input from the image signal input unit 18 into image information representing the gradation of each pixel of the liquid crystal light valves 12R, 12G, and 12B based on an instruction from the control unit 20. Here, the converted image information is classified into red (R), green (G), and blue (B) color lights, and a plurality of pixels corresponding to all the pixels of the liquid crystal light valves 12R, 12G, and 12B. Consists of values. The pixel value defines the light transmittance of the corresponding pixel, and the intensity (gradation) of light transmitted through each pixel and emitted is defined by this pixel value.

  The OSD processing unit 16 performs processing for superimposing and displaying an OSD (on-screen display) image such as a menu image or a message image on the projection image based on an instruction from the control unit 20. The OSD processing unit 16 includes an OSD memory (not shown), and stores OSD image information representing graphics, fonts, and the like for forming an OSD image.

When the control unit 20 instructs to superimpose the OSD image, the OSD processing unit 16 reads necessary OSD image information from the OSD memory, and outputs an image signal so that the OSD image is superimposed at a predetermined position on the projected image. The OSD image information is synthesized with the image information input from the processing means 17. The image information combined with the OSD image information is output to the liquid crystal driving means 14.
When there is no instruction to superimpose the OSD image from the control unit 20, the OSD processing unit 16 outputs the image information input from the image signal processing unit 17 to the liquid crystal driving unit 14 as it is.

  When the liquid crystal driving unit 14 drives the liquid crystal light valves 12R, 12G, and 12B according to the image information input from the OSD processing unit 16, the liquid crystal light valves 12R, 12G, and 12B form images corresponding to the image information, An image is projected from the projection lens 13.

  The control means 20 includes a CPU (Central Processing Unit), a RAM (Random Access Memory) used for temporary storage of various data, and the like, and operates according to a control program (not shown) stored in the storage means 21. As a result, the overall operation of the projector 1 is controlled. That is, the control unit 20 functions as a computer together with the storage unit 21.

  The storage means 21 is composed of a rewritable nonvolatile memory such as a flash memory or FeRAM, a control program for controlling the operation of the projector 1, various setting data for defining the operating conditions of the projector 1, etc. Is remembered. In the present embodiment, the storage unit 21 stores a battery remaining amount reduction flag 211 that is set when a battery remaining amount decrease notification is received from the electronic pen 40.

  The light source control unit 22 controls the supply and stop of power to the light source 11 based on an instruction from the control unit 20, and switches between turning on and off the light source 11.

  The input operation means 23 includes a plurality of operation keys for the user to give various instructions to the projector 1. Although not shown, the input operation unit 23 includes a plurality of operation keys for a user to give various instructions to the projector 1, and is configured with a main body key provided on the outer surface of the projector 1 casing.

  The operation keys of the input operation means 23 include a power key for alternately switching on / off the power, an input switching key for switching a plurality of image input terminals 6, and a menu for displaying a setting menu in a superimposed manner. There are a direction key (four operation keys corresponding to up / down / left / right) used for selecting an item in a key, a setting menu, etc., a determination key for confirming a selected item, a cancel key for canceling an operation, and the like.

  When the user operates various operation keys of the input operation unit 23, the input operation unit 23 outputs an operation signal corresponding to the operation content of the user to the control unit 20. The input operation means 23 may have a configuration including a remote controller (remote control) signal receiving means (not shown) and a remote controller (not shown) capable of remote operation. In this case, the remote controller emits an operation signal such as an infrared ray according to the operation content of the user, and the remote control signal receiving means receives it and transmits it to the control means 20 as control information.

  The pen operation detection unit 25 is configured by an imaging element (not shown) and the like, and based on an instruction from the control unit 20, the operation position (coordinates) of the electronic pen 40, the pressing state of the pen tip switch 40B (see FIG. 2), and the like. The pen operation state is detected, and the detected pen operation information is notified to the control means 20.

  The communication unit 26 includes a wireless communication unit (not shown) using infrared rays or the like, and performs communication with the communication unit 40E of the electronic pen 40. From the projector 1, a power-off notification or the like is transmitted to the electronic pen 40.

  Power such as AC 100 V is supplied to the power supply unit 31 from the outside through the power supply terminal 30. For example, the power supply unit 31 converts a commercial power supply (AC power supply) into a DC power supply having a predetermined voltage and supplies power to each unit of the projector 1. In addition, the power supply unit 31 stops supplying power (operating power) necessary for image projection to each unit (power-on state) and operating power supply based on an instruction from the control unit 20. It is possible to switch between a state (standby state) of waiting for an operation for turning on.

  As shown in FIG. 3, the electronic pen 40 includes a pen tip switch 40B, a notification unit 40C, a control unit 40D, a communication unit 40E, a power supply unit 40F, and the like, and these include a housing 40A (see FIG. 2)) inside or outside.

  The pen tip switch 40B is disposed at the tip of the housing 40A of the electronic pen 40 (see FIG. 2), and the pen operation detection means 25 of the projector 1 detects the pressed state.

  The notification unit 40C corresponds to a notification unit, and includes an LED, a buzzer, and the like, and is disposed on a body portion of the housing 40A of the electronic pen 40 (see FIG. 2). Based on the instruction from the control means 40D, the notifying means 40C notifies the user when the remaining battery level of the electronic pen 40 is reduced, such as by the LED lighting color, blinking pattern, or buzzer sound.

  The control unit 40D controls the operation of the electronic pen 40, and performs communication with the projector 1 via the communication unit 40E, monitoring of the remaining battery level of the power supply unit 40F, control of the notification unit 40C, and the like.

  The communication unit 40E includes a wireless communication unit (not shown) using infrared rays or the like, and performs communication with the communication unit 26 of the projector 1. The electronic pen 40 transmits a battery remaining amount low notification or the like to the projector 1.

  The power supply unit 40F includes a battery (not shown) and the like, and supplies operating power to each unit of the electronic pen 40. The power supply unit 40F includes a battery remaining amount acquisition unit (not shown), and the control unit 40D can monitor the remaining battery level of the power supply unit 40F.

  Next, the operation of the projector system 100 according to the present embodiment will be described with reference to the flowcharts of FIGS. 4 and 5 and the notification image G1, the remaining battery level decrease message M1, and the battery replacement confirmation message M2 in FIG.

  4A and 4B are flowcharts showing the operation of the projector 1. FIG. 4A shows the operation when the low battery level notification is received from the communication means 40E of the electronic pen 40. FIG. 4B shows the operation when the projector 1 accepts the power-off operation. (C) shows the operation when the projector 1 accepts a power-on operation.

  FIG. 6 is a diagram showing a notification image G1, a battery remaining amount low message M1, and a battery replacement confirmation message M2 that are notified (projected) by the projector 1, and FIG. 6A shows the battery from the communication means 40E of the electronic pen 40 to the battery. The notification image G1 corresponding to the case where the low battery level notification is received, (b) is a low battery level message M1 corresponding to the case where the projector 1 accepts the power off operation, and (c) is the projector 1 power on operation. A battery replacement confirmation message M2 corresponding to the received case is shown.

[Operation when a low battery level notification is received from the electronic pen]
As shown in FIG. 4A, when the communication unit 26 receives a low battery level notification from the communication unit 40E of the electronic pen 40 while the projector 1 is operating (step S101), the control unit 20 The amount decrease flag 211 is set (step S102), and the process proceeds to step S103.

  In step S103, the control unit 20 causes the image projection unit 10 to project the notification image G1 (see FIG. 6A) indicating that the battery level of the electronic pen 40 has decreased, and the operation flow ends (step S104). ). Here, step S103 corresponds to a notification step. Further, the image projection unit 10 corresponds to a notification unit.

[Operation when the projector is turned off]
As shown in FIG. 4B, when the projector 1 receives a power-off operation using the power key of the input operation means 23 (step S111), the process proceeds to step S112.

  In step S112, the control means 20 checks whether or not the battery remaining amount reduction flag 211 is set. If the remaining battery charge flag 211 is set (step S112: Y), the process proceeds to step S113. If the remaining battery charge flag 211 is cleared (step S112: N), the process proceeds to step S114.

  In step S113, the control unit 20 causes the image projection unit 10 to project a battery remaining amount reduction message M1 (see FIG. 6B) indicating that the battery level of the electronic pen 40 has decreased, and step S114. Transition to.

  In step S114, the controller 20 causes the light source controller 22 to turn off the light source 11, and the process proceeds to step S115.

  In step S115, the control unit 20 turns off the power of the projector 1 to shift to the standby state, and ends this operation flow.

[Operation when the projector is turned on]
As shown in FIG. 4C, when a power-on operation is accepted by the power key or the like of the input operation means 23 while the projector 1 is on standby (step S121), the process proceeds to step S122.

  In step S122, the control means 20 turns on the light source 11 by the light source control means 22, and the process proceeds to step S123.

  In step S123, the control means 20 checks whether or not the battery remaining amount reduction flag 211 is set. If the remaining battery charge flag 211 is set (step S123: Y), the process proceeds to step S124. If the remaining battery charge lowering flag 211 is cleared (step S123: N), the process proceeds to step S126.

  In step S124, the control unit 20 has confirmed that the battery has been replaced because the battery level of the electronic pen 40 has been reduced when the projector system 100 was used last time, so that the battery replacement confirmation message M2 (see FIG. 6C) is urged. Is projected for a predetermined time by the image projection means 10, and the process proceeds to step S125.

  In step S125, the control means 20 clears the remaining battery charge lowering flag 211, and proceeds to step S126.

  In step S126, the control unit 20 projects an image based on the image signal input from the image signal input unit 18, and the operation flow ends.

  FIG. 5 is a flowchart showing the operation of the electronic pen 40. (a) is a battery remaining amount monitoring operation for periodically monitoring the battery remaining amount of the power supply unit 40F, and (b) is when the projector 1 is detected to be turned off. Shows the operation.

[Battery level monitoring]
As shown in FIG. 5A, when the battery remaining amount monitoring operation for periodically monitoring the battery remaining amount of the electronic pen 40 is started (step S201), the control unit 40D obtains the battery remaining amount value from the power supply unit 40F. Obtain (step S202), the process proceeds to step S203. Here, step S202 corresponds to a remaining amount acquisition step.

  In step S203, the control means 40D checks whether or not the remaining battery level is lowered based on the remaining battery level value acquired in step S202. If the remaining battery level is low (step S203: Y), the process proceeds to step S204. If the remaining battery level has not decreased (step S203: N), the process proceeds to step S206. Here, the low battery level is determined based on whether or not the battery level is equal to or less than a predetermined value.

  In step S204, the control unit 40D causes the notification unit 40C to execute a first notification indicating that the remaining battery level has decreased, and the process proceeds to step S205. The first notification turns on the LED of the notification means 40C, for example.

  In step S205, the control unit 40D transmits a low battery level notification to the projector 1 through the communication unit 40E, and the process proceeds to step S206. Here, step S204 and step S205 correspond to a notification step.

  In step S206, the operation flow ends.

[Operation when projector power-off is detected]
As shown in FIG. 5B, when the communication unit 40E detects the power off of the projector 1 by receiving the power off notification from the communication unit 26 of the projector 1 (step S211), the process proceeds to step S212.

  In step S212, the control unit 40D checks whether or not the notification unit 40C is executing the first notification (whether a decrease in the remaining battery level is detected). If the first notification is being executed (step S212: Y), the process proceeds to step S213. When the 1st information is not performed (Step S212: N), it changes to Step S214.

  In step S213, the control unit 40D causes the notification unit 40C to execute the second notification, and transitions to step S214. Here, the second notification is a notification method different from the first notification, for example, a buzzer is sounded.

  In step S214, the operation flow ends.

According to the embodiment described above, the following effects can be obtained.
According to the projector system 100 of the present embodiment, when the remaining battery level of the electronic pen 40 for drawing on the projection surface decreases, at least one of the projector 1 or the electronic pen 40 notifies the battery of the electronic pen 40. It is possible to prevent the user from overlooking the remaining amount notification.

  In addition, since the electronic pen 40 notifies when the battery level of the electronic pen 40 decreases, it is possible to notify the user that the battery needs to be replaced without obstructing the projection screen.

  In addition, when the battery level of the electronic pen 40 is low and the power of the projector 1 is detected in a state where the first notification is made, the electronic pen 40 performs a second notification different from the first notification. For example, in the first notification, notification is made by LED display so as not to hinder the pen operation of the electronic pen 40, and in the second notification in the state where the power of the projector 1 is turned off and the use is finished, the buzzer sound is stronger. It is possible to notify and prompt battery replacement.

  When the battery level of the electronic pen 40 decreases, the projector 1 projects a notification image G1 (see FIG. 6A). Thereby, even when the user keeps an eye on the electronic pen 40 and is gazing at the projection screen of the projector 1, it is possible to prevent the user from overlooking the notification of the remaining battery level of the electronic pen 40.

  Further, when the projector 1 is turned off in a state where the battery level of the electronic pen 40 is low, the projector 1 projects the battery level low message M1 (see FIG. 6B) of the electronic pen 40, so that it is stronger. It is possible to notify the battery level drop of the electronic pen 40 and prompt battery replacement.

  In addition, when the projector 1 is turned on, the projector 1 projects a battery replacement confirmation message M2 (see FIG. 6 (c)) when the remaining battery level of the electronic pen 40 is detected during the previous use. Before starting to use, it is possible to prompt the user to confirm whether the battery of the electronic pen 40 has been replaced.

Moreover, you may change this embodiment as follows.
(Modification 1)
In the above embodiment, the projector 1 and the electronic pen 40 may display the remaining battery level of the electronic pen 40 in several stages. Accordingly, it is possible to prompt the user to prepare a replacement battery before the battery needs to be replaced.
(Modification 2)
In the above-described embodiment, the projector system 100 may include a plurality of electronic pens 40, and the projector 1 may notify the electronic pen 40 that the remaining battery level is low.

  DESCRIPTION OF SYMBOLS 100 ... Projector system, 1 ... Projector, 6 ... Image input terminal, 10 ... Image projection means, 11 ... Light source, 12R, 12G, 12B ... Liquid crystal light valve, 13 ... Projection lens, 14 ... Liquid crystal drive means, 16 ... OSD process Means, 17 ... Image signal processing means, 18 ... Image signal input means, 20 ... Control means, 21 ... Storage means, 211 ... Low battery level flag, 22 ... Light source control means, 23 ... Input operation means, 25 ... Pen operation Detection means, 26 ... communication means, 30 ... power supply terminal, 31 ... power supply unit, 40 ... electronic pen, 40A ... housing, 40B ... pen tip switch, 40C ... notification means, 40D ... control means, 40E ... communication means, 40F …Power supply part.

Claims (8)

A projector system comprising: a projector that projects an image; and an electronic pen for drawing on a projection surface on which the image is projected,
At least one of the projector and the electronic pen includes a notification unit that notifies that the battery level of the electronic pen is low. The projector system according to claim 1,
The electronic pen includes the notification unit;
The said notification part with which the said electronic pen is provided performs a 1st alert | report when the battery remaining charge of the said electronic pen is falling, The projector system characterized by the above-mentioned. The projector system according to claim 2,
The notification unit included in the electronic pen is a case where the battery level of the electronic pen is low, and when the power of the projector is turned off, a second notification different from the first notification is performed. A projector system characterized by performing. In the projector system according to any one of claims 1 to 3,
The projector system comprising the notification unit. The projector system according to claim 4,
The notification unit included in the projector includes:
A projector system, wherein when the power of the projector is turned off when the battery level of the electronic pen is low, a message indicating that the battery level of the electronic pen is low is projected. In the projector system according to claim 4 or 5,
The notification unit included in the projector includes:
When the power of the projector is turned on, a battery replacement confirmation message for the electronic pen is projected when the remaining amount of the battery of the electronic pen is low when the power is turned off last time. A projector that accepts an operation of an electronic pen for drawing on a projection surface on which an image is projected, and projects the image;
A projector comprising an informing unit for informing that the battery level of the electronic pen is low. A method for controlling a projector system, comprising: a projector that projects an image; and an electronic pen for drawing on a projection surface on which the image is projected,
A remaining amount acquisition step of acquiring a battery remaining amount of the electronic pen;
A notification step of notifying at least one of the projector or the electronic pen when the remaining battery level acquired by the remaining level acquisition step is a predetermined value or less;
A control method for a projector system, comprising:

Images