JP2012073384A - Projection device, projection method and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently utilize a projection area by coping with image inputs of a plurality of systems.SOLUTION: The projection device includes: a wireless LAN interface 13 configured to input a plurality of image signals; projection systems (12, 14 to 19) configured to form and project an optical image; an acceleration sensor 25 for detecting the position of a device housing; and CPU 20 using the plurality of input image signals and configured to project the optical image by use of the projection systems (12, 14 to 19), the optical image including the plurality of images whose directions and arrangement are based on the result of the detection by the acceleration sensor 25.

Description

  The present invention relates to a projection apparatus, a projection method, and a program that are used vertically or horizontally.

  A technology aimed at always projecting an image with an appropriate vertical relationship in consideration of the aspect ratio of the image to be projected, etc., when the device housing is rotated vertically or horizontally with the projection optical axis as the center. It is considered. (For example, Patent Document 1)

JP 2005-208136 A

  Recently, wireless LAN technology has become widespread, and in an environment where a wireless LAN function is standardly installed in a notebook type personal computer, electronic book, portable music player, portable game machine, etc., the projector device has a wireless LAN function. Thus, it is also conceivable to input images from a plurality of devices, divide the area on the same screen, and project them simultaneously. The technique described in the above-mentioned patent document corresponds to only one system of image signal input, and does not assume a plurality of systems of image input.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a projection apparatus, a projection method, and a projection apparatus capable of realizing projection that effectively uses a projection area corresponding to a plurality of image inputs. To provide a program.

  According to the first aspect of the present invention, there are provided input means for inputting a plurality of image signals, projection means for forming and projecting an optical image, detection means for detecting the attitude of the apparatus housing, and a plurality of inputs inputted by the input means. Projection control means for projecting, by the projection means, a light image including a plurality of images in the direction and arrangement based on the detection result of the detection means.

  According to a second aspect of the present invention, in the first aspect of the present invention, the input means accepts an image signal from an external device as needed via a wireless network connection, and the projection control means accepts an image signal by the input means. At this point, a light image including a plurality of images having directions and arrangements based on the detection result of the detection unit is generated and projected by the projection unit.

  According to a third aspect of the present invention, there is provided a projection method for an apparatus having an input unit for inputting a plurality of image signals and a projection unit for forming and projecting an optical image, and detecting the posture of the apparatus housing And a projection control step of projecting a light image including a plurality of images in a direction and an arrangement based on a detection result in the detection step using the plurality of image signals input by the input unit by the projection unit. It is characterized by having.

  According to a fourth aspect of the present invention, there is provided a program executed by a computer built in an apparatus having an input unit for inputting a plurality of image signals and a projection unit for forming and projecting an optical image, the computer being Using the detection means for detecting the attitude of the housing and the plurality of image signals input from the input unit, the projection unit outputs a light image including a plurality of images in the direction and arrangement based on the detection result of the detection means. It is made to function as a projection control means to project by.

  According to the present invention, it is possible to realize projection that effectively uses the projection area in response to image input of a plurality of systems.

1 is a block diagram showing a schematic functional configuration of a data projector apparatus according to an embodiment of the present invention. It is a flowchart which shows the processing content by the external apparatus of the transmission side which concerns on the same embodiment. 6 is a flowchart showing the processing contents by the data projector device on the receiving side according to the embodiment. It is a figure which illustrates the projection content of the synthesized image corresponding to the attitude | position of the data projector apparatus which concerns on the same embodiment.

An embodiment in which the present invention is applied to a data projector apparatus of DLP (Digital Light Processing) (registered trademark) system will be described below with reference to the drawings.
FIG. 1 is a block diagram illustrating a functional configuration of an electronic circuit included in the data projector apparatus 10 according to the present embodiment.

  The input unit 11 includes, for example, a pin jack (RCA) type video input terminal, a D-sub 15 type RGB input terminal, and the like. Analog image signals of various standards input to the input unit 11 are digitized by the input unit 11 and then sent to the image conversion unit 12 via the system bus SB.

  On the other hand, when image data is sent according to a wireless LAN standard such as IEEE802.11a / b / g / n from an external device (not shown) such as a personal computer, it is received by the wireless LAN interface (I / F) 13. The wireless LAN interface 13 demodulates the received digital value image data and sends it to the image converter 12 via the system bus SB.

  The image conversion unit 12 is also generally called a scaler, and after uncompressing data compression as necessary for input image data, the image conversion unit 12 unifies the image data into a predetermined format suitable for projection and sends it to the projection image drive unit 14. .

  The projection image drive unit 14 performs high-speed time-division driving by multiplying the frame rate, for example, 60 [frames / second], the number of color component divisions, and the number of display gradations based on the transmitted image data. A primary color image is displayed on the display element 15.

  The display element 15 is composed of a micromirror element. The micromirror element performs a display operation by individually turning on / off each inclination angle of a plurality of, for example, SXGA (horizontal 1280 pixels × vertical 1024 pixels) micromirrors arranged in an array. An optical image is formed by the reflected light.

  On the other hand, R, G, B primary color lights are emitted cyclically from the light source unit 16 in a time-sharing manner. The primary color light from the light source unit 16 is totally reflected by the mirror 17 and applied to the display element 15.

  Then, an optical image is formed by the reflected light of the display element 15, and the formed optical image is projected onto a screen (not shown) to be projected via the projection lens unit 18.

  The light source unit 16 includes three color semiconductor light emitting elements that emit red (R) light, blue (G) light, and blue (B) light, for example, LEDs (light emitting diodes), and an optical system for emitting each color light. And R, G, and B primary color lights are cyclically generated in a time-sharing manner based on the driving of the light source driving unit 19.

  Here, the light source driving unit 19 drives the light source unit 16 to emit light according to a timing signal synchronized with the image display given from the projection image driving unit 14 and control of the CPU 20 described later.

  The CPU 20 controls all the operations of the above circuits. The CPU 20 is connected to the main memory 21 and the program memory 22. The main memory 21 is composed of a DRAM and functions as a work memory for the CPU 20.

  The program memory 22 is composed of an electrically rewritable non-volatile memory such as a flash memory, and stores an operation program executed by the CPU 20, a processing program for multi-screen projection described later, and other various fixed data. .

  The CPU 20 reads the operation program and data stored in the program memory 22, develops and stores the operation program and data in the main memory 21, and executes the program, thereby controlling the data projector apparatus 10 in an integrated manner. To do.

The CPU 20 executes various projection operations according to key operation signals from the operation unit 23.
The operation unit 23 includes a key operation unit provided in the main body of the data projector device 10 and a laser light receiving unit that receives infrared light from a remote controller (not shown) dedicated to the data projector device 10.

  The operation unit 23 outputs to the CPU 20 a key operation signal based on a key operated by a user with a key operation unit of the main body or a remote controller.

The CPU 20 is further connected to the voice driver 24 and the acceleration sensor 25 via the system bus SB.
The sound drive unit 24 includes a sound source circuit such as a PCM sound source, converts the sound signal given during the projection operation into an analog signal, drives the speaker unit 26 to emit sound, or generates a beep sound or the like as necessary.
The acceleration sensor 25 detects, for example, accelerations in two axial directions orthogonal to each other along a plane orthogonal to the projection optical axis of the projection lens unit 18. The CPU 20 detects the direction of gravitational acceleration based on the detection output of the acceleration sensor 25, thereby determining whether the casing of the data projector device 10 is placed vertically or horizontally.

Next, the operation of the above embodiment will be described.
First, the processing contents when an external device connected to the data projector device 10 by wireless LAN, for example, a personal computer transmits image data will be described with reference to FIG.

  In FIG. 2, the personal computer determines at any time whether or not the content of the screen displayed on the display has been changed (step S101). When it is determined that the screen has been changed, the image data of the next new screen that has been changed is captured (step S102).

  Next, the captured image data is compressed and encoded in a data file format such as JPEG (Joint Photographic Experts Group), for example (step S103). By performing data compression in this way, it is possible to shorten the time for transmission / reception with the data projector device 10 through a wireless LAN connection.

  Next, after the encoded image data is transmitted to the data projector device 10 (step S104), it is determined whether or not an operation for leaving the connection with the data projector device 10 has been performed (step S105). ).

  If it is determined that an operation for leaving has not been performed, the process returns to step S101 again, and thereafter the same process is repeated when the screen is updated.

Then, when an operation for releasing the connection with the data projector device 10 by the wireless LAN is performed by the personal computer, it is determined in step S105, and the processing in FIG.
In this way, an external device such as a personal computer connected to the data projector device 10 via a wireless LAN transmits image data to the data projector device 10 each time the screen changes.

Next, an operation on the data projector apparatus 10 side that receives and projects image data from an external device will be described.
As described above, in the data projector 10, the image conversion unit 12 creates an image to be displayed on the display element 15, and the projection image driving unit 14 displays the created image on the display element 15. The light source drive unit 19 drives the light source unit 16 in accordance with the display.

  These image conversion unit 12, projection image drive unit 14, and light source drive unit 19 all operate under the control of the CPU 20. The CPU 20 reads out an operation program, fixed data, and the like stored in the program memory 22 including the image data creation process described below, and executes the control process after developing it in the main memory 21.

  FIG. 3 shows the processing contents in the data projector apparatus 10 that receives image data from an external device and performs a projection operation associated therewith.

  At the beginning of the processing, the CPU 20 waits for image data to be received via the wireless LAN interface 13 (step R101).

  Then, when the image data is received, it is determined in step R101, and the image conversion unit 12 decodes, for example, JPEG compression applied to the received image data (step R102).

  Next, it is determined whether the number of devices connected to the data projector device 10 by wireless LAN at that time is one or two (step R103).

  If it is determined that the number of external devices connected here is only one, the arrangement of the data projector apparatus 10 housing at that time, that is, whether it is vertically or horizontally is determined. Then, the received image data is resized by the image conversion unit 12 in order to make effective use of the projected area as much as possible (step R104).

  Then, the image is displayed on the display element 15 by the projection image driving unit 14 using the resized image data, and the image is projected using the entire screen by the projection lens unit 18 using the light from the light source unit 16 (step). R105).

  Thereafter, after confirming that the key operation for instructing the end of the projection operation is not performed on the operation unit 23 (step R106), the process returns to the process from step R101 in preparation for the next image input.

  If it is determined in step R103 that the number of external devices connected by wireless LAN is two instead of one, is the data projector device 10 placed vertically next? It is determined from the detection output of the acceleration sensor 25 whether it is horizontally placed (step R107).

  If it is determined that the data projector device 10 is in landscape orientation, the CPU 20 determines that the image data is decoded so that the horizontal long side of the image data decoded in step R102 is approximately half the rectangular long side of the projection range. The conversion unit 12 resizes the image data (step R108).

  Next, the CPU 20 determines whether the external device that sent the image data immediately before is the first or second device in the order of wireless LAN connection (step R109).

  If the CPU 20 determines that it is the first unit, the projection image driving unit 14 causes the display device 15 to display the resized image data on the left side of the projection range (step R110).

  If it is determined in step R109 that the external device is the second unit, the CPU 20 causes the projection image driving unit 14 to display the resized image data on the display element 15 so as to project the resized image data to the right side of the projection range (step S109). R111).

  FIG. 4A illustrates the state of multi-screen projection when the data projector device 10 is placed horizontally. As shown in FIG. 4A, the data projector 10 has a screen from the first transmission-side external device in the upper left part of the projection range PA, and a screen from the second transmission-side external device in the upper right part. Are arranged and projected simultaneously.

  After completing the process in step R110 or R111, the CPU 20 confirms that the key operation for instructing the end of the projection operation is not performed on the operation unit 23 (step R106), and then prepares for the next image input in step R101. Return to processing from.

  If it is determined in step R107 that the data projector device 10 is not in landscape orientation but in portrait orientation, the CPU 20 rotates the image data decoded in step R102 after 90 ° (step R112). The image conversion unit 12 resizes the image data so that the subsequent horizontal short side is approximately ½ of the rectangular long side of the projection range (step R113).

  Next, the CPU 20 determines whether the external device that sent the image data immediately before is the first or second device in the order of wireless LAN connection (step R114).

  If it is determined that the image is the first unit, the CPU 20 causes the projection image driving unit 14 to display the resized image data on the display element 15 in order to project the resized image data on the upper side of the projection range (on the projection target side) (step S15). R115).

  When determining that the external device is the second device in step R114, the CPU 20 causes the projection image drive unit 14 to project the resized image data below the projection range (on the projection target side). The image is displayed on the display element 15 (step R116).

  FIG. 4B illustrates the state of multi-screen projection when the data projector device 10 is placed vertically. As shown in FIG. 5B, the data projector 10 displays a screen from the first transmission-side external device above the projection range PA, and a screen from the second transmission-side external device below the projection range PA. Place each one and project simultaneously.

  After completing the process in step R115 or R116, the CPU 20 confirms that the key operation for instructing the end of the projection operation is not performed on the operation unit 23 (step R106), and then prepares for the next image input in step R101. Return to processing from.

  As described in detail above, according to the present embodiment, when image data from a plurality of external devices connected by a wireless LAN is input, the free space is reduced as much as possible according to the way the data projector device 10 is placed, Projection using the projection area effectively can be realized.

  In addition, in the above embodiment, when two external devices such as two personal computers are connected by a wireless network, the image data is not intermittently streamed at a timing as necessary, instead of stream data such as normal line input. , It is assumed that the input is accepted and the process is executed at any time, so that the same frequency control can be executed while not wastefully using the radio frequency band with a limited capacity and reducing the load on the CPU. Become.

  In the above embodiment, the number of external devices connected to the data projector device 10 by wireless LAN has been described as being two at maximum for ease of explanation. However, the present invention is not limited to this, Although the number of screen divisions increases, of course, the same processing can be performed when three or more external devices are connected.

  In the above embodiment, a case where the present invention is applied to a DLP (registered trademark) data projector has been described. However, the present invention is not limited to a projector system, a light source element, or the like.

  In addition, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention in the implementation stage. Further, the functions executed in the above-described embodiments may be combined as appropriate as possible. The above-described embodiment includes various stages, and various inventions can be extracted by an appropriate combination of a plurality of disclosed constituent elements. For example, even if some constituent requirements are deleted from all the constituent requirements shown in the embodiment, if the effect is obtained, a configuration from which the constituent requirements are deleted can be extracted as an invention.

  DESCRIPTION OF SYMBOLS 10 ... Data projector apparatus, 11 ... Input part, 12 ... Image conversion part, 13 ... Wireless LAN interface (I / F), 14 ... Projection image drive part, 15 ... Display element, 16 ... Light source part, 17 ... Mirror, 18 ... Projection lens unit, 19 ... Light source drive unit, 20 ... CPU, 21 ... Main memory, 22 ... Program memory, 23 ... Operation unit, 24 ... Audio drive unit, 25 ... Acceleration sensor, 26 ... Speaker unit, SB ... System bus .

Claims (4)

An input means for inputting a plurality of image signals;
Projection means for forming and projecting a light image;
Detecting means for detecting the attitude of the device housing;
A projection control unit that uses the plurality of image signals input by the input unit and projects a light image including a plurality of images in a direction and arrangement based on a detection result of the detection unit by the projection unit; A projection apparatus characterized by the above. The input means receives an image signal from an external device at any time through a wireless network connection,
The projection control unit generates an optical image including a plurality of images having directions and arrangements based on the detection result of the detection unit when the image signal is received by the input unit, and causes the projection unit to project the light image. The projection apparatus according to claim 1. A projection method in an apparatus having an input unit for inputting a plurality of image signals and a projection unit for forming and projecting an optical image,
A detection step for detecting the attitude of the device housing;
A projection control step of projecting a light image including a plurality of images in a direction and arrangement based on a detection result in the detection step using the plurality of image signals input in the input unit, on the projection unit. A projection method characterized by A program executed by a computer built in an apparatus including an input unit that inputs a plurality of image signals and a projection unit that forms and projects a light image,
The above computer
Using the detection means for detecting the attitude of the apparatus housing, and the plurality of image signals input from the input unit, the optical image including the plurality of images in the direction and arrangement based on the detection result of the detection means is projected. A program that functions as projection control means for projecting by a unit.

Images