JP2010170048A - Projector device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projector device which is portable and little restricted in installation environment for projecting a video. <P>SOLUTION: In the projector device, when the video is produced by an video forming module 15, an angle at which the video is to be rotated or tilted is detected by a tilt detection module 39, and according to the angle detected by the tilt detection module 39, an image processing module 31 rotates an image signal output by the video forming module 15 by a predetermined amount while maintaining the aspect ratio of the image signal, and the image is projected onto a screen. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a projector device that is portable and is less subject to restrictions related to an installation environment for projecting video.

  A small-sized projector device that has been formed in a portable manner and that enlarges and projects an image held by an electronic device represented by a player device or a mobile phone that reproduces music or video has already been put into practical use.

  In addition, it has already been proposed to install a projector function in a mobile phone.

  For example, Patent Document 1 (prior art document) discloses that, in an information communication terminal device, that is, a mobile phone, an image is projected on an arbitrary surface that can be visually recognized by a user to notify that information has arrived. Yes.

  Further, in Patent Document 2 (prior art document), in the image projection apparatus (projector), a detecting means for detecting the inclination of the image projection apparatus is arranged so as to have an inclination with respect to the optical axis of the projection optical system, It has been disclosed to automate up / down detection and trapezoidal distortion correction during installation.

  Patent Document 3 discloses that an installation angle of a housing is detected by an acceleration sensor, and a driving condition of the liquid crystal panel is corrected in accordance with the angle.

Japanese Patent Laying-Open No. 2004-289401, paragraph [0015], FIG. Japanese Patent Laying-Open No. 2005-348242, paragraphs [0037] to [0045] Japanese Patent Laying-Open No. 2003-5278, paragraph [0017], FIG.

  Patent Document 1 only assumes a generally horizontal surface as an environment in which a mobile phone used for image projection is located, and the image is projected by being placed on an inclined surface or being held by the user. There is no indication of the effects of strain or vibration.

  Japanese Patent Application Laid-Open No. 2004-228561 is a projector apparatus that projects an image mainly in a fixed state, and suppresses the projection of a vertically inverted image or an image with a trapezoidal distortion at the time of installation. The effects of image distortion and vibration caused by the projection are not taken into consideration.

  In Patent Document 3, the image signal is rotated according to the detection result of the inclination detection module, but the aspect ratio of the image signal is not taken into consideration.

  An object of the present invention is to provide a projector device that is portable and is less subject to restrictions on the installation environment for projecting video.

  The present invention has been made on the basis of the above-described problems, and is an image that generates a video image corresponding to each color component by spatially modulating light for each color component output from a light source based on image information for each corresponding color component. The image forming module, the inclination detecting module for detecting an angle at which the image should be rotated or tilted when generating the image, and maintaining the aspect ratio of the image signal according to the angle detected by the inclination detecting module. A projector apparatus comprising: an image processing module that rotates a predetermined amount of an image signal output to the video forming module; and a projection optical system that projects an image formed by the video forming module onto a screen. To do.

  According to one embodiment of the present invention, it is possible to obtain a projector device that is portable and is less likely to be restricted by an installation environment for projecting an image.

  In addition, it is not necessary for the user to set the correction value by measuring the inclination of the installation surface when installing the projector device (mobile phone device), and operability and convenience can be improved.

  Furthermore, when projecting a reconstructed image formed by the DLP method using a DMD element, by using an LED light source, for example, a projector device capable of replaying a high-resolution video can be integrated into a mobile phone device. For example, a moving image or a still image captured by a camera function can be enlarged and projected on the spot, and a plurality of users can view a reproduced video at the same time.

1 is a schematic diagram for explaining an outline of a projector apparatus that is less likely to be restricted by an installation environment to which an embodiment of the present invention is applied. Schematic which shows an example of a structure which applies the projector apparatus shown in FIG. 1 to a mobile communication terminal device (mobile telephone apparatus). Schematic which shows an example of a structure (element) of the mobile telephone apparatus with a projector function shown in FIG. Schematic explaining the example which projects a projection image in the state which closed the display unit of the mobile telephone apparatus with a projector function shown in FIG. 2 with respect to the main body unit. Schematic explaining the relationship between the mobile phone device with a projector function shown in FIG. 2 or the installation surface of the projector device shown in FIG. FIG. 3 is a schematic diagram illustrating an example of a method for obtaining an angle (rotation angle) at which a projection image should be rotated in the mobile phone device with a projector function shown in FIG. 2 or the projector device shown in FIG. 1.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 shows an outline of a projector apparatus that is less likely to be restricted by the installation environment to which the embodiment of the present invention is applied. In each element described below, an element called “module” may be realized by hardware, or may be realized by software using a CPU (microcomputer) or the like. May be.

  The projector apparatus 1 shown in FIG. 1 projects an image formed by DLP (registered trademark), that is, a digital light processing method onto a screen by a projection optical system 11. An image processor (image control module) for performing image conversion by, for example, resolution conversion, rotation correction or trapezoidal distortion correction, which will be described later, so that an image can be displayed by a DMD (registered trademark) = Digital Micromirror Device element ) 15.

  In the preceding stage of the image control module 15, an A-D converter 17 that converts the video signal input to the video input unit 13 into a digital signal when the video signal is analog and a video decoder 19 that decodes when the video signal is digital are provided. Is provided.

  The projection optical system 11 includes an illumination light source 21 that outputs light of R (red), G (green), and B (blue) colors, for example, a 640 × 480 minute mirror that can be controlled independently, A DMD element 23 that selectively reflects light of each color output from the light source 21 to sequentially form images of three primary colors (R, G, B), and individual images formed by the DMD element 23 on a screen The projection lens 25 which projects toward is included.

  The illumination light source 21 includes LED elements that output light of respective colors of R (red), G (green), and B (blue). Needless to say, the individual LEDs may be prepared integrally in a single package, or three LEDs may be provided independently.

  Each mirror of the DMD element 23 is driven in accordance with a drive signal output from a drive circuit (DMD) 27 in accordance with a projection image signal output from the image control module 15. That is, an arbitrary mirror of the DMD element 23 is incident on the projection lens 25 based on the image information that is color-separated into R, G, and B so that the reflected light is reflected so that the reflected light enters the projection lens 25. The posture (angle) is controlled to any one of the non-image positions that are reflected so as not to be reflected. Accordingly, the R, G, and B image lights reflected at the image output position are sequentially projected onto the screen.

  The projector apparatus 1 also outputs a main control module (microcontroller) 31 that controls each of the above-described elements, a ROM 33 that holds a program for operating the main control module 31, a RAM 35 that is used as a work memory, and an illumination light source 21. The temperature sensor 37 for acquiring temperature information used to suppress the hue (color) of the light to be changed with a change in the ambient temperature, and the environment where the projector apparatus 1 is located, for example, an inclined surface. Or an inclination sensor (acceleration sensor) 39 or the like for detecting that an image is projected while being held by the user. Needless to say, a well-known user interface such as a remote terminal (remote controller) or a main body key is used for inputting a control signal to the main control module 31.

  The projector device 1 shown in FIG. 1 can be incorporated into a mobile phone device, for example, and FIG. 2 shows an outline thereof.

  A mobile phone device (projector device) 51 with a projector function includes, for example, a display unit 60 and a main unit 60 that hold an LCD (liquid crystal) display panel or an EL (self-luminous) panel and an imaging lens. The display unit 60 and the main unit 70 are connected to each other by a connection unit 80, and the display unit 60 is openable to the main unit 70. Note that a projection lens 25 that projects an image when used as a projector device is located at a predetermined position in the connection unit 80 or in the vicinity thereof. The projection lens 25 will be described later with reference to FIG. 4. After the image to be projected is selected by the user and a projection instruction for the image is input, the display unit 60 is closed, for example, on a desk. In this case, an image on the display unit 60 side that may be a disturbance to the projection image projected on the screen S can be excluded from the user's field of view.

  On the surface of the display unit 60 located on the main unit 70 side, the telephone number of the call destination or the other party at the time of the incoming call, the address of the data transmission destination or the transmission source, the character information or image information being edited or reproduced, etc. are displayed. A possible display unit 62 and a speaker 63 used for voice calls and music data reproduction are provided.

  The main unit 70 is provided with an input unit 73 used for inputting numerical values or character information and a microphone 74 used for voice communication. Although not described in detail in the input unit 73, for example, a numeric key (dial) used for inputting a destination telephone number or numeric data, a transmission key, an end key, a power key, a volume adjustment key, a mode designation key, etc. Various setting keys used for setting various functions and specifying operation states are provided. The multifunction keys 73a, 73b, and 73c in the input unit 73 are selected / returned, scrolled, for example, corresponding to a GUI (Graphical User Interface) displayed at a predetermined position of the display unit 62 of the display unit 60. It can be used to input commands such as / switching and determination, and various operation inputs can be made corresponding to the information displayed on the display unit 62.

  FIG. 3 shows an example of a hardware configuration of the mobile terminal device (projector device) shown in FIG.

  The communication unit 101 includes an antenna duplexer (DUP) 102, a reception circuit (RX) 103, an intermediate frequency synthesizer (SYN) 104, a transmission circuit (TX) 105, a CDMA signal processing unit 106, and others. The CDMA signal processing unit 106 is connected to at least a compression / decompression processing unit (hereinafter referred to as compander) 107 and a PCM (voice) code processing unit (hereinafter referred to as PCM codec) 108.

  The radio signal transmitted from the base station is received by the antenna and input to the receiving circuit (RX) 103 by the DUP 102. In the receiving circuit 103, the received radio signal and the local oscillation signal output from the frequency synthesizer (SYN) 104 are mixed and frequency-converted (down-converted) into an intermediate frequency signal.

  The reception circuit 103 outputs a reception baseband signal obtained by orthogonally demodulating the intermediate frequency signal. The frequency of the local oscillation signal generated from the frequency synthesizer 104 is instructed by a control signal SYC from the main control module 111 described below.

  The received baseband signal is input to CDMA signal processing unit 106.

  The CDMA signal processing unit 106 includes a RAKE receiver.

  In the RAKE receiver, a plurality of paths included in the received baseband signal are each subjected to despreading processing using spreading codes. The signals of the paths subjected to the despreading process are combined after being matched in phase. As a result, received packet data in a predetermined transmission format is obtained.

  The received packet data is input to a compression / decompression processing unit (hereinafter referred to as a compander) 107. The compander 107 includes a demultiplexing unit (not shown). The received packet data output from the CDMA signal processing unit 106 is separated for each media data (type of information) by the demultiplexing unit, and is decoded for each media data. The For example, when the received packet data includes audio data, the audio data is decoded by a speech codec (not shown). If video data is included in the received packet data, the video data is decoded by a video codec (not shown).

  The digital audio signal decoded via the compander 107 is input to a PCM (voice) code processing unit (hereinafter referred to as a PCM codec) 108, and the digital video signal is input to the main control module 111. When the received packet data includes text data such as mail, the text data is stored in the storage unit 113 through the main control module 111.

  The digital audio signal output from the compander 107 is PCM decoded by the PCM codec 108 and output to the reception amplifier 109 as an analog audio signal. The audio signal input to the reception amplifier 109 is amplified to a predetermined level and output to the speaker 61. Therefore, the reproduced sound or music is output from the speaker 61.

  The digital video signal output from the compander 107 is converted into a signal format suitable for display on an LCD (Liquid Crystal Devise) panel of the display unit 62 using a video RAM (SDRAM), that is, a work memory 129 described later, The data is transferred to the LCD panel at a predetermined timing. Thus, an image is displayed on the LCD panel (62) in accordance with a video signal input via an LCD drive circuit (not shown).

  Text data such as e-mail is called from the storage unit 113 at a predetermined timing based on a user instruction input from the input unit 73, and corresponds to character information or symbols to be displayed by a code conversion unit (not shown). It is converted into a code string, superimposed on the video reproduced in the work memory 129 as necessary, and supplied to the LCD panel 62 as information to be displayed on the LCD panel. Thereby, on the LCD panel 62, a video (moving image or still image), characters, symbols, and the like are displayed in accordance with a signal input via an LCD driving circuit (not shown).

  For example, when the answering machine mode is set, the audio data and the video data at the stage before being decoded by the compander 107 are controlled by the main control module 111, for example, in the answering recording area in the storage unit 113. Remembered.

  On the other hand, the user's voice input to the microphone 74 is amplified to an appropriate level by the transmission amplifier 110, then encoded to a PCM code by the PCM codec 108, and input to the compander 107 as a digital audio signal. . In addition, a video signal that is an image captured by a camera mechanism described later, that is, a moving image or a still image, is digitally processed by the image processing module 127 by the main control module 111 and input to the compander 107. Note that text data such as e-mail created in the main control module 111 is also input to the compander 107 via the main control module 111.

  The compander 107 detects the amount of energy of the input voice for the digital audio signal input from the PCM codec 108, and determines the transmission data rate based on the detection result. Based on the determined transmission data rate, the digital audio signal is encoded into a signal having a format corresponding to the transmission data rate. In this way, transmission audio data is generated. The compander 107 encodes the digital video signal output from the main control module 111 to generate video data.

  Audio data and image data are packetized according to a predetermined transmission format by a demultiplexing unit (not shown) of the compander 107. The packetized transmission packet data is output to the CDMA signal processing unit 106. Text data such as mail is also packetized in the same manner and multiplexed into transmission packet data.

  In the CDMA signal processing unit 106, the transmission packet data output from the compander 107 is subjected to spread spectrum processing using a spreading code assigned to the transmission channel, and the output signal is output to the transmission circuit (TX) 105.

  In the transmission circuit 105, the signal subjected to spectrum spread in the CDMA signal processing unit 106 is modulated by, for example, a QPSK digital modulation method. The modulated transmission signal is combined with a local oscillation signal generated from the frequency synthesizer 104 and frequency-converted into a spatial wave of a predetermined frequency, that is, a radio signal.

  The radio signal output as a spatial wave from the transmission circuit 105 is amplified at a high frequency so as to have a transmission power level indicated by the main control module 111 prior to transmission (in the transmission circuit 105).

  The amplified radio signal, that is, a high-frequency signal is supplied to the antenna via the antenna duplexer 102 and transmitted to the base station.

  The electric power used for the series of operations or data storage and holding described above is supplied in advance from a commercial power source or an external battery device (not shown) via the power supply terminal 72 and held in the battery 114. Further, the power held in the battery 114 is supplied to each part of the cellular phone device (projector device) 51 as a predetermined operation power supply voltage Vcc by the power supply circuit 115 during operation or as necessary.

  The main control module 111 also includes an I / O port (input / output unit) 111b connected to a CPU (Central Processing Unit) 111a used for the above-described series of operations or data storage and retention. By being connected to 71 connectors (interfaces) 121, signals can be exchanged with the service system (administrator side host device). The connector 121 connected to the I / O port 111b is described in detail so that communication by a spatial wave is possible when connected to a personal computer owned by the user or a modem provided in an arbitrary device. It is possible to assign signals for input / output according to the protocol that is not.

  An external interface 111c and a USB (Universal Serial Bus) port 111d are also connected to the CPU 111a.

  The external interface 111c is connected to a card slot 131 that can exchange data with a card-like storage medium (semiconductor memory), for example, a microSD card (registered trademark) M, which is widely used.

  The card slot 131 is different from the cellular phone device 1 via the microSD card M, and stores still images and moving images captured (acquired) by a camera mechanism described later, or image data obtained (downloaded) by communication. Used to move to a playback device, personal computer, or the like. In addition, by using the microSD card M, code information obtained by digitizing music data or image information prepared in advance is moved to the mobile phone device (projector device) 51, and the mobile phone device 51 reproduces music or images. Can do.

  A USB connector 123 is connected to the USB port 111d, and various external devices widely used today such as an external storage device and a portable music player can be connected. Of course, a recorder device or the like capable of USB connection can also be connected, and video (moving image) or the like can be input.

  Note that the image information to be imaged input to the CMOS sensor 75 as light brightness / darkness and color information by the imaging lens 61 is optimized by the input image processing module 125 in terms of white balance, input γ characteristics, color balance, and the like. The image data is temporarily stored in the work memory 129 via the image processing module 127. The image data corresponding to the captured image held in the work memory 129 is stored in the storage unit 113 when the user performs a save operation. In addition, when it transmits as an attached image as it is, it is packetized as mentioned above, and it transmits toward a base station according to a transmission procedure.

  In the projector module 201, the video signal supplied from the work memory (SDRAM) 129 and the synchronization signal (SYC) supplied from the main control module 111 are input to the signal processing module 211 and the projector control module 213. Assuming that the projector module 201 is incorporated into the mobile phone device 1, illumination light (R (red), G (green), Each of the three elements (B (blue)) is spatially modulated with a video signal to obtain a projection image (output image). An illumination light source, that is, an LED array 21 is used as a light source of illumination light.

  A video signal that has been subjected to image processing for DMD display such as resolution conversion by the signal processing module 211, that is, an image signal for projection is subjected to angle-of-view conversion by the angle-of-view conversion module 212 and supplied to the DMD drive circuit 27.

  The DMD drive circuit 27 controls the operation of the individual mirrors of the DMD element 23 and matches the timing at which the individual LED elements or chips of the illumination LED 21 should output light of the respective colors R, G, and B. The current control module (laser drive circuit) 216 is instructed about the current value to be supplied to each LED element or chip so that each LED element or chip outputs light of a predetermined intensity.

  The cellular phone device (projector device) 51 also obtains temperature information used to suppress the color (color) of the light output from the illumination light source (LED) 21 from being changed with a change in ambient temperature. An inclination sensor (acceleration sensor) 39 for detecting the environment in which the sensor 37 and the projector device 1 are located, for example, being positioned on an inclined surface or being projected by the user while being held in the image. including. It is assumed that the tilt sensor (acceleration sensor) 39 can detect the acceleration with respect to two axes of the horizontal direction (x-axis direction) and the vertical direction (y-axis direction).

  The output of the temperature sensor 37 is recognized as the current temperature in the temperature analysis module 219 and supplied to the correction value calculation module 220.

  In accordance with the current temperature supplied from the temperature analysis module 219, the correction value calculation module 220 is a temperature difference between the LED elements, a deviation from a temperature (reference temperature) in which color (color reproducibility) as a projector device is set, and the like. In accordance with the result, the magnitude of the drive current to each LED corresponding to the correction value, that is, the current control value is set, and the current value supplied from the current control module 216 to each LED element or chip is corrected. (The light intensity is temperature compensated for each color.) When the ambient temperature of the illumination light source (LED) 21 is lower than the reference temperature, projection starts to a predetermined value that is smaller (less) compared to the reference temperature according to the temperature compensation curve prepared for each LED element or chip. The magnitude of the driving current at the time is set. Also, when the ambient temperature of the illumination light source (LED) 21 is higher than the reference temperature, projection starts to a predetermined value that is larger (larger) than the reference temperature according to a temperature compensation curve prepared for each LED element or chip. The magnitude of the driving current at the time is set.

  It should be noted that various well-known user interfaces such as a remote terminal (remote controller) or a main body key are used for inputting the control signal to the main control module 31 although not described in detail.

  FIG. 4 shows a state in which the display unit 60 is closed in a state where an arbitrary image is projected by the mobile phone device with projector function (projector device) 51 shown in FIG. That is, after an image to be projected is selected by the user and a projection instruction for the image is input, the cellular phone device 51 can be placed on, for example, a desk. Thus, an image on the display unit 60 side that may cause disturbance can be excluded from the user's field of view.

  FIG. 5 shows the relationship between the rotation of the projected image and the aspect ratio of the image when the mobile phone device used for image projection with the display unit closed is installed at an arbitrary angle with respect to the horizontal plane.

  As shown in FIG. 5B, for example, the size of the projected image when the main unit 70 (the mobile phone device 51) is rotated 90 degrees with respect to the horizontal plane is as shown in FIG. On the other hand, the aspect ratio (a: b) is maintained as a result of the image processing by the projector control module 213 (equivalent to the image forming module 15 shown in FIG. 1), although it becomes smaller. Note that the size of the image can be adjusted by the distance between the main unit 70 (the mobile phone device 51) and the screen (projection surface), and it is beneficial that the aspect ratio does not change. Of course, it goes without saying that it is not always necessary to maintain the aspect ratio.

  Similarly, as shown in FIG. 5C, for example, the display unit 60 is released from the main body unit 70 with the arrow A direction orthogonal to the axial direction of the connection portion 80 connecting the main body unit 70 and the display unit 60 as an axis. In this case, the projected image is in the same state as when the main unit 70 (the mobile phone device 51) is installed on an inclined surface having a predetermined angle. In this case, the image size is smaller than that of the projected image shown in FIG. 5A, but the aspect ratio (a: b) is maintained.

  Note that the sampling time for projecting the rotated projection image described with reference to FIG. 5B or FIG. 5C is preferably set (usually several times per second) (usually several times per second). Thus, for example, when the user projects an image while holding the mobile phone device 51 (projector device 1), it is possible to suppress the shake of the projected image caused by the vibration of the user's arm (hand) (so-called camera shake). Correction can be realized).

  Hereinafter, the principle of projecting the rotated projection image described with reference to FIG. 5B or 5C will be described with reference to FIG.

  Using the output of the tilt sensor (acceleration sensor) 39 shown in FIG. 3 (or FIG. 1), the acceleration in the horizontal direction (x-axis) and the vertical direction (y-axis) of the mobile phone device 51 (projector device 1) is detected. .

  Specifically, as shown in FIG. 6A, in the normal (horizontal) installation state, only the gravitational acceleration g in the y-axis direction is applied, and the acceleration in the x-axis direction is zero.

On the other hand, as is clear from FIG. 6B, when the mobile phone device (projector device) 51 is rotated with an angle θ between the main unit 70 and the horizontal plane, the gravitational acceleration g is
x-axis direction: g · sin θ
y-axis direction: g · cos θ
Therefore, the angle θ (rotation angle) can be calculated.

  Therefore, by using the obtained angle θ and outputting an image rotated by the projector control module 213 (example in FIG. 2) or the image forming module 15 (example in FIG. 1), the projected image is substantially parallel to the horizontal plane. It can be made an erect image.

  If the reversal (rotation angle 180 degrees) of the projector device 1 (the mobile phone device 51) is not taken into consideration (that is, if only the correction considering only the rotation from −90 degrees to +90 degrees is sufficient), x Only the acceleration in the axial direction needs to be detected, and the acceleration sensor (tilt sensor) 39 can be an inexpensive one-axis model.

  Further, as described above, the aspect ratio of the projected image is maintained (fixed), and the size (magnification) of the image is left to the movement of the mobile phone device 51 (projector device 1) in the optical axis direction. A portable projector device that is inexpensive, has a small number of components, and is lightweight can be obtained as a result.

  Needless to say, so-called trapezoidal distortion in which the axis of the projection lens 25 is tilted with respect to the horizontal direction can be corrected based on the output of the tilt sensor (angle sensor) 39.

  As described above, by applying one embodiment of the present invention, it is possible to obtain a projector device that is portable and that is less subject to installation environment restrictions for projecting video.

  In addition, it is not necessary for the user to set the correction value by measuring the inclination of the installation surface when installing the projector device (cell phone device), and the operability and convenience are improved.

  Furthermore, when projecting a reconstructed image formed by the DLP method using a DMD element, by using an LED light source, for example, a projector device capable of replaying a high-resolution video can be integrated into a mobile phone device. For example, a moving image or a still image captured by a camera function can be enlarged and projected on the spot, and a plurality of users can simultaneously view the video.

  In addition, this invention is not limited to each embodiment mentioned above, A various deformation | transformation or change is possible in the range which does not deviate from the summary in the stage of the implementation. In addition, the embodiments may be implemented by appropriately combining them as much as possible, or by deleting a part thereof. In that case, various effects resulting from the combination or deletion can be obtained.

  DESCRIPTION OF SYMBOLS 1 ... Projector apparatus, 15 ... Image processor (image formation module), 21 ... Illumination light source (LED), 23 ... DMD (DLP) element, 25 ... Projection lens, 27 ... DMD drive circuit (drive module), 31 ... Main control Module 37 ... Temperature sensor 39 ... Tilt (acceleration) sensor 51 ... Mobile phone device with projector function (mobile communication terminal device) 60 ... Display unit 61 ... Imaging lens 62 ... LCD panel (display unit) 70 DESCRIPTION OF SYMBOLS ... Main unit, 73 ... Input part, 75 ... CMOS sensor, 101 ... Communication part, 111 ... Main control module (control part), 113 ... Memory | storage part, 125 ... Input image processing module, 127 ... Image processing module, 129 ... SDRAM (Work memory), 201 ... projector module, 211 ... signal processing module Le, 212 ... angle conversion module, 213 ... projector control module (imaging module), 216 ... current control module (laser driving circuit), 219 ... temperature analysis module, 220 ... correction value calculation module.

Claims (8)

An image forming module that spatially modulates light for each color component output from the light source based on image information for each corresponding color component, and generates an image corresponding to each color component;
An inclination detection module that detects an angle at which the image should be rotated or tilted when the image is generated by the image forming module;
An image processing module that rotates a predetermined amount of an image signal output to the video forming module while maintaining an aspect ratio of the image signal according to an angle detected by the tilt detection module;
A projection optical system that projects an image formed by the video forming module onto a screen;
A projector apparatus comprising:   The projector apparatus according to claim 1, wherein the inclination detection module detects an inclination in at least two axial directions.   The projector according to claim 2, wherein the image processing module obtains a sine component and a cosine component of gravity acceleration detected by the inclination detection module.   The projector apparatus according to claim 1, wherein the image forming module includes a DMD element. Detect the angle at which the image to be projected should be tilted or rotated with respect to the horizontal direction,
According to the detected angle, rotate the image information corresponding to the output image while maintaining the aspect ratio,
The light for each color component output from the light source is spatially modulated based on the image information for each corresponding color component to generate an image corresponding to each color component.
A video display method characterized by outputting an erect image regardless of the installation environment.   6. The video display method according to claim 5, wherein the rotation of the image information corresponding to the output image is obtained from a sine component and a cosine component of the detected gravitational acceleration. An image forming module that spatially modulates light for each color component output from the light source based on image information for each corresponding color component, and generates an image corresponding to each color component;
An inclination detection module that detects an angle at which the image should be rotated or tilted when the image is generated by the image forming module;
An image processing module that rotates a predetermined amount of an image signal output to the video forming module while maintaining an aspect ratio according to an angle detected by the inclination detection module;
A projection optical system that projects an image formed by the video forming module onto a screen;
A mobile phone device characterized by comprising:   8. The cellular phone device according to claim 7, wherein the image processing module rotates image information in accordance with an angle obtained from a sine (sin) component and a cosine (cos) component of gravitational acceleration detected by the tilt detection module. .

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