JP4859592B2 - Small projection apparatus, installation position adjustment method, and parameter adjustment method for small projection apparatus - Google Patents

Description

  The present invention relates to a small projection device, an installation position adjustment method, and a parameter adjustment method for a small projection device, and more particularly, to a small and lightweight device having a projection function.

Conventionally, a compact projection device (projector) that is equipped with a projection lens that magnifies and projects image information displayed by modulating light flux emitted from a light source lamp with a light valve onto a screen has been put into practical use. ing.
In order to provide image information to a large number of people and to display a clear image, this projector generates image light with a high luminous intensity emitted from a light source lamp and projects it on a large screen. (See FIG. 14).

  The installation position of the projector is determined from the screen projection size and projection distance, the height of the table, and the installation position on the table. If the positions of the table and the screen are fixed, the installation position is determined by the installation position on the table.

  Usually, this installation position is determined while observing an actual projection image on the screen. During this installation work, if a person enters the projection area of the screen projected from this projector and looks into the projection lens, the projected strong projection light is projected to the human eye, and it is very dazzling and temporarily causes visual acuity. You may lose your eyesight, and your eyesight may not be easily recovered.

  In order to solve such a problem, in the techniques of Patent Documents 1, 2, and 3, when an obstacle such as a human enters the area of the projection light between the projector and the screen, the light source of the projection light Dimming or switching to a black image to protect a person who has entered the projection area from the projection light.

On the other hand, mobile phones incorporating a miniaturized projector are also known (Patent Documents 4 and 5). The mobile phones disclosed in Patent Documents 4 and 5 are capable of enlarging and projecting at least a part of an image displayed on a display onto an external projection surface via a projector.
JP-A-6-105191 JP 2000-19637 A JP 2002-196418 A JP 2004-289401 A Japanese Patent Laid-Open No. 2001-21992

  The projectors described in the above Patent Documents 1, 2, and 3 are stand-alone products that are independent projectors, and project an enlarged video signal supplied from the outside, and are installed once to project a screen. After that, there was little worry that the installation position, its orientation, angle, etc. would move. For this reason, the projection light area is constant, and there is a possibility that the eyes are damaged by a powerful light source only when a human moves and enters the projection light area.

However, in the case of the mobile phones of Patent Documents 4 and 5, unlike conventional stationary projectors, applications with high mobility are born, but there are problems that have not existed before.
For example, since the mobile phone is a communication device, it may be in an incoming state even when an image is projected using the projector function, and may be picked up by the operator.

When communication is completed and an image is to be projected again, the cellular phone once picked up by the operator is placed in the almost original position, and then the position is adjusted while viewing the screen projection image.
In that case, the projection direction may suddenly change in an unexpected direction, and the eyes of the operator or other viewers may enter the range of the projection light. In this case, there is a problem that a person whose projection light enters the eyes is very dazzling and in the worst case damages the retina.

  The present invention has been made in consideration of the above circumstances, and is a small projection device that can adjust the amount of light to be projected when the device is moved and can be quickly and easily reinstalled when returning to the original installation position. An object of the present invention is to provide an installation position adjustment method and a parameter adjustment method for a small projection apparatus.

In order to solve the above-described problems, the present invention has the following configuration.
The small projection device includes a projection unit that projects projection data, a video processing unit that performs signal processing of the projection data, an audio processing unit that performs signal processing of audio output information, and a detection unit that detects an installation state of the device. Is provided.

A string (or strap) or a string with a hook is attached to the detection unit of the small projection device, and one end of the opposite side of the string attached to the detection unit is fixed to one of the installation locations. Here, the hook may be fixed to an arbitrary position on the string.
The detection information detected by the detection unit may use any of the following or any combination.

(1) The angle of the string connected to the detection unit.
(2) Tension received by the string connected to the detection unit.
(3) The length by which the detection unit is provided with a mechanism capable of winding the string and the string is pulled out.

The values detected by the detection unit are compared with values stored in advance, and if the comparison results are different, it is determined that the installation state of the device has changed. This determination may be made by comparing whether or not they are equal within a certain range.
Further, it may be checked whether the same judgment is made continuously within a certain time. For example, when it is determined that there is a continuous match within a certain period of time, it is considered that the comparison results match, and otherwise, it is considered as a mismatch.

  When it is determined that the installation state of the small projection device has changed from the fixed state, the projection unit is set to reduce or extinguish the amount of light to be projected, and the video signal to be projected to the video processing unit is muted. Set to reduce the luminance component. Furthermore, the audio processing unit may be set to reduce the audio output.

Later, when the value detected by the detection unit coincides with the installation state when the apparatus is fixed, it is determined that the small projection apparatus is installed again and returned to the state before the change.
Or it has an acceleration sensor in the above-mentioned detection part, and it is judged that the installation state of the device has returned to the previous installation state when acceleration change by the acceleration sensor is no longer detected.
At that time, the operator may be notified by display or sound.
In this case, the same setting as when the amount of light to be projected is fixed to the projection unit is reset to the same setting as when the video signal to be projected to the video processing unit is fixed. Furthermore, you may reset to the same setting as when the audio | voice output was being fixed with respect to the audio | voice processing part.
Further, when the small projection apparatus communication includes a communication unit, the resetting may be performed when the communication is completed.

  Here, the light intensity increase / decrease setting for the projection unit, the video luminance component increase / decrease setting for the video processing unit, and the audio output increase / decrease setting for the audio processing unit may be performed step by step or over time. May be. In addition, when the small projection apparatus includes a communication unit, every time a ring tone rings, the light intensity increase / decrease setting for the projection unit, the luminance component increase / decrease setting for the video processing unit, and the audio output for the audio processing unit The increase / decrease setting may be performed.

Furthermore, the light intensity increase / decrease setting for the projection unit, the video luminance component increase / decrease setting for the video processing unit, and the audio output increase / decrease setting for the audio processing unit may be performed step by step along with the change in the detection value. You may go.
Furthermore, when the difference amount decreases by taking the change in the difference between the value detected by the detection unit and the value detected by the detection unit in a previously installed state, the light intensity increases stepwise. When the sound is increased and the amount of difference increases, light reduction and sound reduction may be performed.
Further, according to the change amount of the difference, the beep sound volume, pitch, and rhythm (intermittent sound speed) may be varied and sounded.

  Alternatively, when the small projection device includes a communication unit, when projecting an image, the operation of the incoming notification is limited (for example, the incoming lamp is not turned on, the backlight of the display unit of the terminal is not turned on, The direction of the projection light may not be changed by not ringing the ring tone, not operating the vibrator, or any combination thereof.

Furthermore, in the above-described small projection apparatus, the projection unit, the video processing unit, the audio processing unit, the detection unit, or the communication unit can be separated by one or more arbitrary combinations.
For example, in the case where the first part including the projection unit and the detection unit and the second part including the video processing unit, the audio processing unit, and the communication unit are configured separately, the first part provided with the detection unit is installed. The state may be detected. Note that the separation configuration is not limited to the above example, and any part provided with a detection unit may detect the installation state of the apparatus.

  In the above-described small projector, the projected video and audio may be input from an external device. Furthermore, the projected video and audio may be acquired from an external network by the communication unit.

  The present invention can also solve the above-described problems by a program for realizing the functions of the mold projection apparatus having the above-described configuration by a computer or a computer-readable recording medium on which the program is recorded.

According to the present invention, in a small projection apparatus, after being installed at a position suitable for projection, when the installation condition is changed due to an incoming call or the like, and the projection position becomes indefinite, the projection light is dimmed or the like. It is possible to avoid the influence on the person in the area.
Furthermore, since the light is automatically increased when it matches the original installation state in an attempt to return to the original installation state, the re-installation can be performed quickly and easily.

Further, by taking a change in the difference between the value detected by the detection unit and the value detected by the detection unit in the previously installed state, it can be seen that the value is close to or far from the value of the previously installed state.
In addition, when this difference amount decreases, dimming and sound increase are performed step by step, and when the difference amount increases, dimming and sound reduction are performed to facilitate re-installation quickly and easily. Is possible.
Further, according to the amount of change in the difference, the beep sound volume, pitch, and rhythm (intermittent sound speed) are varied and pronounced, so that the re-installation can be performed quickly and easily.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments according to a small projection device of the invention will be described with reference to the drawings.
The embodiment will be described using a small projection device with a communication function, for example, a mobile phone with a projection function. However, the present invention can be similarly applied to a small projection device without a communication function.

<Embodiment 1>
FIG. 1 is a schematic configuration diagram of a small projection apparatus with a communication function according to the first embodiment of the present invention. In FIG. 1, the small projection apparatus 100 includes a main control unit 101, an antenna 102, a communication unit 103, and an operation unit. 104, a memory 105, a detection unit 106, an incoming call notification unit 107, a video processing unit 108, a projection unit 109, a display unit 110, an audio processing unit 111, a speaker 112, a microphone 113, and a string 160.

The main control unit 101 controls the operation of the small projector 100 by executing a predetermined control program stored in the memory 105.
The antenna 102 transmits and receives voice, characters, images, video data, and the like when performing wireless communication with other communication terminals and external networks via wireless radio waves.
The communication unit 103 is controlled by the main control unit 101 and performs wireless communication with the base station of the mobile phone communication network through the antenna 102 by a predetermined communication method. Through this wireless communication, voice telephone communication can be performed with a specific mobile phone or the like, and data communication such as transmission / reception of e-mails or content download from an information providing site can be performed. The communication unit 103 is not limited to wireless communication via the antenna 102, and may perform wired communication such as a LAN (Local Area Network) or a telephone line.

  The memory 105 includes, for example, a RAM (Random Access Memory), a ROM (Read Only Memory), a flash memory, and the like, and stores a control program executed by the main control unit 101 and various data. The memory 105 also includes contents such as images, music, and various types of documents downloaded from an information providing site or a PC (Personal Computer) that can be connected to the small projection device, a PDA (Personal Digital Assistant), or a mobile phone. It is also used to store data.

  The operation unit 104 includes data input keys (numerical key, * key, # key), communication start key, communication end key, scroll key, multi-function key, etc. In addition to communication transmission and reception, numbers, characters, etc. Various types of information including instructions for data input and function selection displayed on the display unit 110 are input.

The string 160 is a string or strap connected to the small projector 100. The string 160 has a hook (an anchor) at a variable position on the string, and can be fixed to a desk or the like by the hook.
In the following description, the string 160 is described as a string with a hook, but the present invention can be similarly applied to a strap. Even if there is no hook, if the string 160 is fixed by the operator's hand, it can be handled in the same manner as when the hook is present.

The detection unit 106 is a mechanical switch (ON / OFF by tension), a tension sensor, a rotation angle sensor, a length sensor (refers to a sensor that detects the length of a string drawn from the winding mechanism), human body communication, an infrared sensor. , A contact sensor, a sensor for detecting opening / closing, opening / closing angle, and rotation angle of the small projection device 100, or any combination thereof. The detection unit 106 is connected to the string 160 and detects the angle, tension, string length, and the like of the string 160.
The detection unit 106 automatically stores values detected at regular intervals in the memory 105, and the main control unit 101 determines the installation state of the small projection device 100 based on the stored values, and the image processing unit 108, Controls the state of the projection unit 109, the sound processing unit 111, and the like.

  When the incoming notification unit 107 receives an incoming call from another communication terminal, the main control unit 101 controls the vibrator to vibrate with a combination of the number of vibrations, vibration speed, vibration pattern, etc. according to the type of incoming call, In addition, light is emitted with a combination of lighting color, blinking speed, blinking pattern, and the like.

  The video processing unit 108 processes the image data and video data received by the communication unit 103, the image data and video data stored in the memory 105, or the image data and video data captured from an external device, and displays the data. 110, and further to the projection unit 109 in the projection mode.

The projection unit 109 includes a lamp control, a lamp, an optical system, and a projection lens. As the lamp, an LD (semiconductor laser), an LED (light emitting diode), or the like can be used. The control of lighting, extinguishing, dimming, and brightening of the lamp is based on control data sent from the main control unit 101. It is controlled by the lamp controller. The optical system can use a transmissive light valve using an LCD or a DMD (Digital Micromirror Device), and project the projection image sent from the image processing unit 108 onto the screen 300 via the projection lens. It is an optical device.
The display unit 110 includes, for example, a liquid crystal display (LCD) and the like. The backlight is controlled by the main control unit 101 and displays an image or video sent from the video processing unit 108.

  The voice processing unit 111 encodes the transmission voice signal input from the microphone 113 by a predetermined method and sends the encoded signal to the main control unit 101. In addition, the voice processing unit 111 decodes the received voice signal received by the communication unit 103 and outputs it from the speaker 112. Further, the sound processing unit 111 outputs sound data such as sound data and sound effects stored in the memory 105, or sound signals such as sound data and sound effects captured from an external device, from the speaker 112.

Next, FIG. 2 is an explanatory diagram showing a state in which an image is projected onto the screen 300 by the small projection device 100 according to the first embodiment installed on a table.
The small projection device 100 is specified to project an image or a video in a state where the standby operation mode and the projection mode are selected, and then a stage (or desk) with the light exit port of the projection unit 109 facing the screen 300. Place it on 150 or set it on a charger and place it on the table 150.
The installation position of the small projection apparatus 100 placed in this way can be considered in two-dimensional coordinates (X, Y) with the end of the stage 150 as a base point if the positions of the stage 150 and the screen 300 are fixed. .

As shown in FIG. 2, a string 160 is connected to the string attaching portion 180 of the small projection device 100, and a hook 170 that can be fixed at a variable position on the string 160 is provided. That is, the length L of the string 160 from the string attaching portion 180 of the small projection device 100 to the position of the hook 170 can be changed.
Alternatively, the small projection device 100 may be provided with a mechanism for winding and storing the string 160 so as to adjust the pull-out amount of the string 160 and make the length L of the string 160 variable.

  The hook 170 of such a small projection apparatus 100 is fixed to the end of the base 150, and a target projection image is projected onto the screen 300. When this position is set as the installation position of the small projection device 100, the appropriate length L of the string 160 and the two-dimensional coordinates on the table 150 are determined by stretching the string 160 by any one of the above methods.

  Alternatively, in the case of a string without the hook 170, the small projection apparatus 100 is installed at a position where the string 160 is stretched by fixing the string 160 to the end of the base 150 by pressing the middle or the end of the string 160 with a hand. Set the position.

Further, the string attaching portion 180 can have a detection unit 106 including a sensor that detects the tension of the string 160.
The detection unit 106 can detect whether the string 160 is stretched or loosened. If the detected tension is equal to or greater than a certain value, the correct projection position with respect to the screen 300 is detected. The lamp can be turned on and the image can be projected.

  However, if a tension over a certain level cannot be detected, it is determined that the installation position is not correct, and the lamp is turned off or the image or video is muted (decrease in luminance component). The image or video at this time may be stored in the memory 105, may be received via the communication unit 103, or may be read from an external device. Further, the small projection device 100 may be closed or open.

Further, the string attachment unit 180 of the small projection device 100 is provided with a detection unit 106 including a sensor (for example, a biaxial angle sensor illustrated in FIG. 4) that detects an angle at which the string 160 is subjected to tension and an elevation angle. May be.
The biaxial angle sensor in the example of FIG. 4 includes a rotation mechanism and a tilt mechanism.
The rotation mechanism rotates about the rotation center axis by the tension of the string 160 fixed to the end of the table (desk) 150 by the hook 170. The rotation mechanism is provided with an angle sensor, and can detect a left-right rotation direction or an angle rotation angle of two axes.

  On the other hand, angle detection in the elevation direction is performed by a tilt mechanism. The tilt mechanism is configured on the rotation mechanism and operates in the elevation direction about the tilt central axis. The tilt mechanism is provided with an angle sensor, and the elevation angle of the string 160 can be detected.

Further, the detection unit 106 may detect the tension of the take-up and storage-type string 160 having the take-up mechanism shown in FIG.
According to FIG. 5, the winding mechanism comprises a bobbin, a ratchet / brake mechanism, and a winding shaft (with a winding spring). The string 160 is wound around a bobbin, and the end is pulled out via a biaxial rotation angle mechanism. Further, a roller may be provided as a guide so that the drawer is smooth.

  The take-up shaft has a spring structure like a mainspring. When a tension is applied to pull out the string 160, the bobbin rotates left and the spring is also taken up. The cam has an uneven structure like a gear and rotates together with the bobbin.

  The ratchet / brake mechanism has a ratchet structure that is pressed by the uneven structure of the cam. At the position where the string 160 is pulled out, it is locked by a ratchet and is once fixed. When the lock of the ratchet is released, the bobbin rotates clockwise by the wound spring force and automatically winds the string 160. Alternatively, this winding mechanism may have a drag (stepless brake) function as provided in a fishing reel.

In such a winding mechanism, the bobbin is provided with a rotation sensor and a tension sensor for detecting the amount of rotation (number of rotations and angle), and the length and tension of the string 160 pulled out can be detected. This rotation sensor can be realized by a rotary encoder using a photo interrupter used for a PC mouse or the like. The tension may be a simple switch structure.
The configuration of the sensor of the detection unit 106 described above is an example, and the present invention is not limited to this.

  While projecting an image in such a state, the operator touches the small projection device 100 to deviate the direction of the projected light, or picks up or opens the small projection device 100 when an incoming call is received. If the direction of the projected light is deviated, or if you attempt to adjust the installation position in order to re-install, the direction of the projected light will be deviated during the installation position adjustment, It may get into the human eye (Figure 3). In this case, the surrounding people are very dazzling and in the worst case, the retina may be damaged.

In order to avoid such a state, first, when the small projection device 100 is touched or moved, the amount of projection light is reduced or turned off to reduce glare.
In the resetting, the hook 170 is fixed to the corner of the stand 150, the two-dimensional coordinates on the arc having the length L of the string 160 as a radius are quickly obtained, and the string 160 is stretched to reset the correct installation position. be able to.
After the resetting was completed, the projection was resumed by returning to the original light intensity.

  FIG. 6 is a functional configuration diagram of a portion related to the projection function of the small projection device 100 according to the first embodiment. In FIG. 6, the small projection device 100 has a projection instruction unit 121 in addition to a general telephone function. , Including an initial setting unit 122, a projection data storage unit 123, a projection control unit 124, a determination unit 125, and an incoming call operation restriction unit 126. Each of these units can be realized by executing a control program stored in the memory 105.

When the operator selects the projection mode from the menu displayed on the display unit 110 or presses the projection mode instruction button, the main control unit 101 activates the projection instruction unit 121.
The projection instruction unit 121 causes the operator to specify desired projection data from the projection data storage unit 123 or an external resource source (such as an external network or an external device), and presses a projection execution key. When the projection execution key is pressed, the initial setting unit 122 is activated.

Similarly, the projection mode can be ended by selecting from the menu or pressing the projection mode end button.
These series of instructions can also be realized by recognizing input voice data using a voice menu.

First, the operator installs the small projection device 100 at an appropriate position so that a desired image is projected.
At that time, when the string 160 is pulled out, the hook 170 is fixed to the end of the base 150 and a tension is generated on the string 160, the initial setting unit 122 stores the projection mode in the memory 105 and the small projection from the determination unit 125. The installation state of the apparatus 100 is received, and the received installation state is stored in the memory 105.

  The installation state to be stored in the memory 105 includes video and audio parameters (hue, contrast, etc.) in addition to the length of the string from the place fixed by the hook 170 to the string attachment part 180, the tension, the value of the biaxial angle sensor, and the like. , Brightness, volume, etc.), optical system parameters (zoom, focus, focus, etc.). Among these, video and audio parameters are set in the main control unit 101 by the operation unit 104, and optical system parameters are optical system setting data in the projection unit 109.

Here, when the small projection device 100 is installed for the first time or when it is installed at a position different from the previous time, the installation state is not automatically acquired, but is installed from the determination unit 125 according to an instruction from the operator. The state may be acquired, or the operator may input the installation state.
Further, instead of automatically storing the installation state as a result of the initial setting, the installation state may be received from the determination unit 125 and stored in accordance with an operator instruction from the operation unit 104. .

  The projection control unit 124 is activated from the main control unit 101, and normally sends control data to the lamp control unit so that the light amount preset by the operator is set, and the designated projection data is processed by the video processing unit 108. Then, the image is sent to the optical system of the projection unit 109.

However, when a “moved state” (described later) is sent from the determination unit 125, control data for dimming or turning off is sent to the lamp control unit. Alternatively, the control data may be a video signal mute (decrease in luminance component, for example, black). Further, dimming and extinguishing may be performed in stages.
Further, dimming and extinguishing may be performed in stages as time passes.
Further, it may be performed stepwise in accordance with a change in the detected value from the detection unit 106.

At this time, in addition to the string length, tension, and biaxial angle sensor values that were in the “fixed state” until now, the image and audio parameters, optical system parameters, etc. are stored as memory. It memorizes to 105. Further, the position information of the projection data received from the projection instruction unit 121 and the position information of the audio data are also stored in the memory 105 as the installation state. This position information is a storage address or start position on a memory storing projection data and sound data, and reproduction is started using the projection data and sound data at the position indicated by this position information. The
The installation state stored in the memory 105 may be output to an external device via the display unit 110, a network, or an external interface in response to a request from the operator.

In addition, when a “fixed state” (described later) is notified from the determination unit 125, the projection control unit 124 sends control data that will be brightened again, and the projection data from the reproduction position stored in the memory 105. Is processed by the video processing unit 108 and sent to the projection unit 109.
This light increase may increase the light amount stepwise, or may increase by fading in stepwise. If there is audio data, the audio processing unit 111 similarly processes it from the reproduction position and outputs it to the speaker 112. At this time, like the projection data, the sound volume may be increased stepwise, or the sound volume may be increased by fading in stepwise.
Furthermore, the fade-in may be performed step by step as time elapses.
Further, it may be performed stepwise in accordance with a change in the detected value from the detection unit 106.

  Similarly, when receiving a communication end signal, the projection control unit 124 controls and outputs the projection data and the sound data so as to return them step by step.

Next, the determination unit 125 compares the value detected by the detection unit 106 with the detection value until the previous time to determine the installation state of the small projection device 100, and the determination result is used as the initial setting unit 122 and the projection control. Notification to the unit 124.
Next, a method for determining the installation state will be described.

(1) When the detected value is the angle, tension, or length of the string, the detection unit 106 automatically stores the detected value at regular intervals, and the determination unit 125 detects the detected value and the immediately preceding value. Is not regarded as equivalent within a certain range, it is determined that the installation state has changed, and if it is regarded as equivalent within a certain range, It is determined that there is no change in the “fixed state”.

Furthermore, if it is not regarded as an equal value within the above-mentioned fixed range for a certain period of time, it is determined that the installation state has been changed, and it has been continuously moved for a certain period of time. It may be determined that the installation state does not change when it is regarded as an equal value within a certain range.
These fixed ranges and fixed times are stored in the memory 105, and are set in advance by the operator using the operation unit 104. Alternatively, it may be preset in the memory 105 as a default value.

For example, when the small projection device 100 is moved from an appropriate installation position on a desk or table, the detection amounts of the string tension sensor and the biaxial angle sensor change. In such a case, it is determined as “moved state”.
Further, even when a change occurs in the length with which the string is pulled out, the small projection device 100 may be moved, so that it is determined as “moved state”.
On the other hand, if there is no change in the detection amount of the string tension sensor or the biaxial angle sensor, or there is no change in the length with which the string is pulled out, the small projection device 100 is appropriately placed on the desk or table. Therefore, it is determined to be “fixed state”.

(2) When the detected value is from an acceleration sensor, if an acceleration change is detected by the acceleration sensor, it is determined that the installation state has changed, and the acceleration change is not detected. If it is, it is determined that there is no change in the installation state, “fixed state”.
For example, when the operator holds the small projection device 100 in his / her hand or is moved, the acceleration sensor changes, so that it is determined as “moved state”.
On the other hand, the fact that no change occurs in the acceleration sensor means that the small projection device 100 is in a fixed state, and is determined as a “fixed state”.
In particular, in the case of the determination based on the tension, angle, and length by the above-described string, when the hook 170 is removed, the tension and the angle are determined to be “moved”, but the acceleration sensor detects acceleration. If there is no change, it can be determined that the state is “fixed”.

After the operator moves the small projection apparatus 100, the hook 170 is again fixed to the corner of the desk or table 150 and tension is applied to the string 160 in order to make it “fixed” again.
Thereafter, the biaxial angle sensor in the string attaching portion 180 moves on the arc indicated by the length of the string around the fixed hook 170, and the angle θ1 formed by the projection direction and the string is the same as the previous time. At that point, it can be seen that it was installed in a previously fixed position (see FIG. 7).

When the elevation angle θ2 is given to the installation of the small projection device 100, the biaxial angle sensor moves on the arc indicated by the length of the string around the fixed hook 170, and the projection When the elevation angle θ2 formed by the direction and the string becomes the same as the previous time, it can be seen that it is installed at the position fixed before (see FIG. 8).
Therefore, since the operator only needs to adjust the angles of θ1 and θ2, relocation can be performed quickly and easily.

Further, when the determination unit 125 determines that the state is “fixed” for a certain period of time, or when it is first determined to be “moved state”, the installation state of the small projection device 100 (in the detection unit 106). And the like (parameters such as video / audio / optical system parameters) are stored in the memory 10.
Furthermore, the installation state may be output through an external device or an external network as necessary.

  If there is an incoming call during the projection, the operation limiting unit 126 at the time of incoming call gives a control signal to the projection control unit 124 so that it fades out step by step for every number of ringing sounds or over time. The incoming call operation restriction unit 126 is not always necessary when the incoming light is dimmed or turned off immediately when an incoming call is received.

Further, when in the projection mode, an arbitrary combination may be set in advance so as to limit the operation of incoming call notification. For example,
・ Do not light the incoming call lamp in the incoming call notification unit 107.
-The display backlight of the display unit 110 is not turned on.
・ Do not ring the incoming call notification unit 107.
-Since the projection screen shakes, the incoming call notification unit 107 does not vibrate the vibrator.

FIG. 9 is a flowchart showing a processing procedure of a portion related to the projection function of the small projection apparatus according to the first embodiment.
While waiting (step S1), when the operator selects a projection mode with a menu, projection mode button, or voice and projection data is designated (step S2 / YES), the projector enters a projection mode after step S3.
On the other hand, when the projection mode is not designated (step S2 / NO), if there is an incoming call, the communication is performed. When the communication is completed, the process returns to step S1 and waits (steps S16 to S18).

Entering the projection mode, first, the small projection device 100 is installed at a temporary position for projection, and when the small projection device 100 is fixed to the table with a hook, the length of the string is determined (step S3).
Next, an actual projection image is projected on the screen 300 (step S4).
The detailed setting position is determined while viewing the projected image projected on the screen 300, and the tension of the string is determined at the determined position while adjusting the parameters relating to the optical system and video / audio such as zoom, focus, and focus (step S5). If the tension is applied, detection values of various sensors and video / audio / optical system parameter values at that time are stored in the memory (step S6).

When the projection is to be ended (step S7 / YES), the process returns to step S1 and waits again. When the projection is continued (step S7 / NO), the change of values detected from various sensors is examined (step S8).
When there is no change in the detection values of the various sensors (step S8 / NO), the video projection is continued until returning to step S7 and completing the projection.

On the other hand, when there is a change in the detection values of the various sensors (step S8 / YES), it is assumed that the small projection device 100 has moved from the installation position for some reason, and the reproduction position of the projection image is stored and the lamp is dimmed. The light is turned off and the video is muted (step S9).
At this time, the installation state (installation position, video / audio / optical system parameters, etc.) when the small projector 100 is fixed and the reproduction position of the projection data and audio data are stored in the memory.

When the detection values of the various sensors are compared with the detection values of the various sensors detected last time stored in the memory and are regarded as equal within a certain range (step S10 / "match"), the small size Assuming that the projection apparatus has been reset, the parameters of the video / audio / optical system stored in the memory are read and set (step S11), the control data for increasing the brightness is sent again, and the playback position stored in the memory Is set so that projection data and audio data are read out (step S12), and the process returns to step S4 to resume projection. Here, the light increase and the sound increase may be performed by gradually increasing the light amount and volume, or fading in stepwise.
Furthermore, the fade-in may be performed step by step as time elapses.
Further, it may be performed stepwise in accordance with a change in the detected value from the detection unit 106.

  On the other hand, when the detection values of the various sensors are compared with the detection values of the various sensors detected last time stored in the memory, if they are not regarded as equivalent within a certain range (step S10 / "Inconsistency" )) Assuming that the small projection apparatus 100 is still moving, communication is performed if there is an incoming call. When communication is completed, the process returns to step S10 to determine whether the small projection apparatus 100 has been reset (steps S13 to S13). S15).

Here, the determination of the detection value is “match” when it is regarded as coincidence continuously within a certain period of time, and when it is not regarded as coincidence within a certain period of time, “ It may be regarded as “mismatch”.
In addition, when the incoming call is not immediately received, control data is supplied to the lamp control unit so as to fade out every time the number of ringtones or over time, and projection is continued. Good.
Furthermore, the fade-out may be performed step by step as time elapses.
Further, it may be performed stepwise in accordance with a change in the detected value from the detection unit 106.

  With the above-described configuration, in a small projection apparatus having a communication function, not only can the re-installation be performed quickly, but the installation position is greatly different, and the direction of the projection light suddenly changes, and the person in the projection light area When a light enters, it can prevent powerful light from entering the eyes.

<Embodiment 2>
In the small projection device of the first embodiment described above, the projection function portion and the communication function portion are the same body. However, as illustrated in FIG. 10, the mounting device (cradle or charger) 200 of the communication function portion 100 is used. You may comprise so that it may have a projection function part.
Even in this configuration, when the communication function unit 100 is attached to or detached from the cradle 200 or when the cradle 200 is moved, the problem that the projection light similarly enters the eyes of the operator arises.

FIG. 11 is a schematic configuration diagram of a small projector with a communication function according to the second embodiment of the present invention.
In the second embodiment, a small projection apparatus with a communication function includes a communication function part 100 and a cradle (projection function part) 200. The communication function part 100 includes a main control unit 101, an antenna 102, and a communication unit 103. Operation unit 104, memory 105, detection unit 106, incoming call notification unit 107, video processing unit 108, display unit 110, audio processing unit 111, speaker 112, microphone 113, external interface (I / F) 114, string 160 Consists of.

  The cradle 200 includes a control unit 201, a projection unit 202, and an external interface (I / F) 203. In the figure, the same parts as those in FIG. 1 described above are denoted by the same reference numerals and the description thereof is omitted. Here, as the projection unit 202, the projection unit 109 having the same configuration as that of the first embodiment can be employed.

When the communication function part 100 is attached to the cradle 200, the external connection terminal of the external I / F 203 on the cradle 200 side and the external connection terminal on the communication function part 100 side are electrically connected. . Thereby, the projection data and control data from the communication function part 100 can be sent from the main control unit 101 to the control unit 201 on the cradle 200 side and passed to the projection unit 202 to project a desired image on the screen 300. .
The audio data may be output from the speaker 112 provided in the communication function unit 100, or the cradle 200 may be provided with a speaker and output from the speaker.

Further, in order to determine an appropriate installation position when the communication function part 100 is reinstalled, the string 160 with hook is connected to the detection unit 106 and provided in the communication function part 100 as in the first embodiment. Further, the same detection unit 106 as that of the first embodiment can also be used.
Using such a hook-attached string 160, the string 160 can be fixed to the corner of the base with a hook, and can be quickly set to an appropriate position on the arc having the length of the string 160 as a radius.

  With the above-described configuration, in a small projection apparatus with a communication function provided with a projection function portion in the cradle, not only can the re-installation be performed quickly, but also the installation position is greatly different, and the projection light direction changes suddenly. Thus, when a person enters the projection light area, it is possible to prevent powerful light from entering the eyes.

<Embodiment 3>
Further, as illustrated in FIG. 12, the cradle 200 of the second embodiment is replaced with a small projection device 400, and a string with a hook is attached to a string attachment portion of the small projection device 400, and a communication function part (for example, a portable communication terminal) ) A configuration in which the connection between 100 and the small projection apparatus 400 is performed by wireless communication is also conceivable.
In this case, when the communication function unit 100 is set to the projection mode, the desired projection data is transmitted to the small projection apparatus 400 by wireless communication, and the projection data and the projection data are transmitted according to the request from the small projection apparatus 400. Transmission of audio data can be interrupted, and projection data and audio data can be retransmitted in order to resume playback from the interrupted position.

The small projector 400 has a schematic configuration as shown in FIG. 13 and includes a control unit 401, a projection unit 402, a detection unit 403, a memory 404, and an external interface (I / F) 405. The external I / F 405 is an interface for short-range wireless communication with the communication function unit 100.
The control unit 401 controls the operation of the small projector 400 by executing a predetermined control program stored in the memory 404.
The projection unit 402 can employ the same configuration as the projection unit 109 of the first embodiment described above.
The detection unit 403 can employ the same configuration as the detection unit 106 of the first embodiment.
The memory 404 includes a ROM, a RAM, a flash memory, and the like, and stores a control program, a detection value of the detection unit 403 of the small projection apparatus 400, a reproduction restart position of video / audio / optical system parameters, projection data, and the like. .

As shown in FIG. 12, in this small projection device 400, a string 160 is attached to a string attaching part 180, and the string attaching part 180 is provided with a detecting part 403, as in the first embodiment. A hook is attached at a variable position.
And this detection part 403 makes it possible to detect the length and tension | tensile_strength by which the string 160 was pulled out, and the angle and elevation angle which receive the tension | tensile_strength of a string similarly to Embodiment 1. FIG.

  The functional configuration of such a small projection apparatus 400 is the same as the functional configuration of the first embodiment shown in FIG.

First, the operator installs the small projection device 400 at an appropriate position while adjusting the video / audio and the optical system so that the desired video is projected onto the screen 300. At that time, when the string 160 is pulled out, the hook 170 is fixed to the end of the base 150, and the tension is generated on the string 160, the state of the small projection device 400 (the length of the string, the tension of the string, the string tension) In addition to the tension receiving angle and elevation angle, etc., the video and audio parameters (color, contrast, brightness, volume, etc.), optical system parameters (zoom, focus, focus, etc.), etc. are stored in the memory 404.
Then, when the communication function unit 100 is in the standby operation mode and the projection mode, when the image or video is transmitted to the small projection device 400 and instructed to project, the small projection device 400 projects the received projection data. To do.

During projection in the state of being installed in this way, the operator may touch the small projection device 400 and the direction of the projected light may deviate and enter the eyes of the person who is watching. In this case, the viewer is very dazzling and in the worst case, the retina may be damaged.
Therefore, when the detection unit 403 detects that the small projection device 400 has moved from the installation position, the amount of projection light is reduced or turned off to reduce glare. In this dimming, it may be faded out step by step as time elapses.
Furthermore, the fade-out may be performed step by step as time elapses.
Further, it may be performed step by step in accordance with a change in the detected value from the detection unit 403.

Thereafter, in response to the notification or instruction that the setting has been reset, the light is increased and the sound is increased again, and projection is resumed. The light increase and sound increase may be made to increase the light amount and the volume step by step, or may be made to increase by fading in steps.
Furthermore, the fade-in may be performed step by step as time elapses.
Further, it may be performed step by step in accordance with a change in the detected value from the detection unit 403.

  With such a configuration, in a small projection apparatus requested for projection from the communication function part, not only can the re-installation be performed quickly, but the installation position is greatly different, and the projection light direction suddenly changes and is projected. When a person enters the light area, it is possible to prevent powerful light from entering the eyes.

  In the third embodiment described above, instead of the communication function unit 100, a device that can communicate with the small projection apparatus, such as a PC or PDA, is used, and projection data is transferred from the PC or PDA and projected by the small projection apparatus. Alternatively, the connection form may be not only wireless communication but also connected by a cable.

Further, not limited to the configuration of the above-described embodiment, for example, in the above-described small projection apparatus, the projection unit, the video processing unit, the audio processing unit, the detection unit, or the communication unit can be separated by one or more arbitrary combinations. A separated configuration may be used as long as the component provided with the detection unit detects the installation state of the device.
In addition, this invention is not limited to embodiment mentioned above, Of course, various deformation | transformation and correction are possible within the range which does not deviate from the summary of this invention.

  In addition, a program that causes a computer to function as each unit of the small projection apparatus that constitutes the above-described embodiment is created, written in a recording medium in advance, and each of these programs recorded on the recording medium is executed by the small projection apparatus. Needless to say, the object of the present invention is achieved. In this case, the program itself read from the recording medium realizes the functions of the above-described embodiment, and the program and the recording medium recording the program also constitute the present invention.

Note that the program for realizing the functions of the above-described embodiments includes a disk system (for example, a magnetic disk, an optical disk, etc.), a card system (for example, a memory card, an optical card, etc.), and a semiconductor memory system (for example, a ROM, a nonvolatile memory). Etc.) and a recording medium of any form such as a tape system (for example, magnetic tape, cassette tape, etc.). Alternatively, the program stored in the storage device may be directly supplied from the server computer via the network. In this case, the storage device of this server computer is also included in the recording medium of the present invention.
As described above, by programming and distributing the functions of the above-described embodiment, the cost can be reduced, and the portability and versatility can be improved.

1 is a schematic configuration diagram of a small projection device according to Embodiment 1. FIG. It is a figure explaining a mode that it is projecting with the small projection apparatus concerning Embodiment 1. FIG. It is a figure explaining a mode when adjusting the reinstallation position. It is a figure explaining an angle detection mechanism. It is a figure explaining a winding mechanism. FIG. 3 is a functional configuration diagram of a portion related to a projection function of the small projection device according to the first embodiment. It is a figure explaining a mode that the position on a plane is set using the biaxial rotation angle sensor. It is a figure explaining a mode that an elevation angle is set up using a 2 axis rotation sensor. 4 is a flowchart illustrating a processing procedure of a portion related to a projection function of the small projection device according to the first embodiment. It is a figure explaining a mode that it is projecting with the small projection apparatus concerning Embodiment 2. FIG. It is a schematic block diagram of the small projector concerning Embodiment 2. FIG. It is a figure explaining a mode that it is projecting with the small projection apparatus concerning Embodiment 3. FIG. It is a function block diagram of the small projector concerning Embodiment 3. It is a figure explaining the installation example of the conventional projector.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Eye, 100 ... Small projection apparatus (communication function part), 101 ... Main control part, 102 ... Antenna, 103 ... Communication part, 104 ... Operation part, 105 ... Memory, 106 ... Detection part, 107 ... Incoming notification part, DESCRIPTION OF SYMBOLS 108 ... Video processing part, 109 ... Projection part, 110 ... Display part, 111 ... Sound processing part, 112 ... Speaker, 113 ... Microphone, 114 ... External I / F, 121 ... Projection instruction part, 122 ... Initial setting part, 123 ... projection data storage unit 124 ... projection control unit 125 ... determination unit 126 ... operation limit unit upon incoming call, 150 ... stand, 160 ... string (strap), 170 ... hook (tether), 180 ... string attachment unit, DESCRIPTION OF SYMBOLS 200 ... Mounting apparatus (cradle or charger), 201 ... Control part, 202 ... Projection part, 203 ... External I / F, 300 ... Screen, 400 ... Small projection apparatus, 401 ... Control part, 402 Projecting portion, 403 ... detection unit, 404 ... memory, 405 ... external I / F.

Claims (13)

A small projection apparatus , a string attached so as to be able to be pulled out and stored by a winding means incorporated in the apparatus, and a length of the string pulled out from the winding means and an angle or tension of the string. A detection unit that detects one or both of the detection unit and a determination unit that determines a change in the installation state of the device based on the detection value detected by the detection unit. A small projection device characterized in that, when it is determined that there has been a change in the brightness, the amount of light to be projected is reduced, or the luminance component of video data is reduced. In small projection apparatus according to claim 1, when said detecting portion is fixed to the end or middle of the front Kihimo, the angle of cord, to detect the tension and length, the determining unit one of the detection value A small projection apparatus that determines a change in the installation state of the apparatus from any combination of the above. 3. The small projection device according to claim 1, wherein the determination unit compares a value detected by the detection unit with a previously detected value, and the installation state of the device changes when a comparison result is different. It is judged that it was carried out, The small projector characterized by the above-mentioned. The small projection apparatus according to claim 1 or 2 , wherein the detection unit stores detected values at regular intervals, and the determination unit compares the detected value with the immediately preceding value, thereby installing the apparatus. A small projection apparatus characterized by determining a change in state. In small projection apparatus according to any of claims 1 to 4, wherein if the change in the installation state of the determination unit in the apparatus is determined to have occurred, before a change in the installation state of the device occurs, the projection operation, A small projection apparatus that stores one or more arbitrary combinations of parameters relating to video processing and audio processing. In small projection apparatus according to any of claims 1 to 5, wherein the determination unit is a value detected by the detection unit, when it is determined that no longer fixed time changes, the projection operation, the parameters relating to image processing and audio processing A small projection apparatus that stores one or more arbitrary combinations. The small projection device according to any one of claims 1 to 6 , wherein when the value detected by the detection unit is the same detection value as before the change of the installation state of the device, A small projection device characterized in that the installation state is determined to have returned to the previous installation state, and the result is displayed or pronounced. The small projection device according to any one of claims 1 to 7, further comprising a communication unit capable of communicating with an external network, wherein the communication unit, when the determination unit determines a change in the installation state of the device, small projection apparatus characterized by restricting the incoming notification. 9. The small projection apparatus according to claim 8 , wherein the communication unit does not light an incoming lamp, does not light a backlight of a display unit of the terminal, does not sound a ring tone, does not operate a vibrator, or these A small projection apparatus that limits incoming notifications in any combination.   In the installation position adjustment method in which the small projection apparatus is installed at the original position, a string is attached to the apparatus, the free end of the string is fixed and installed at an appropriate position, and the angle and tension of the string at the installation position When the device is moved and re-installed after the device is moved, the free end of the cord is fixed at the same length as before, and the detected value of the cord angle and tension moves the device. An installation position adjusting method characterized by detecting approaching or moving away from a previous detection value and at least reducing or increasing the amount of light to be projected based on the detection result.   In a parameter adjustment method for a small projection apparatus capable of setting parameters relating to projection operation, video processing and sound processing, a string is attached to the apparatus, and the angle, tension and length of the string are detected at regular intervals, and these detected values Compared with the previous detection value, if it is considered that it is not equal within a certain range, it is determined that the installation state of the device has changed, and before the change in the installation state of the device occurs, Storing in one or more arbitrary combinations of parameters relating to projection operation, video processing and audio processing, and setting parameters for reducing the amount of light to be projected and parameters for reducing the luminance component of video data Parameter adjustment method for a small projector. 12. The parameter adjustment method for a small projection apparatus according to claim 11 , wherein it is determined that the installation state of the apparatus has changed only when an acceleration change is detected by the acceleration sensor. Method. 13. The parameter adjustment method for a small projection apparatus according to claim 11 or 12 , wherein when it is determined that the apparatus has returned to the previous state, the stored parameter before the change is reset. Projector parameter adjustment method.

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