JP5082208B2 - Projection apparatus, projection method, and program - Google Patents

Description

  The present invention relates to a projection apparatus, a projection method, and a program suitable for making a presentation or the like by connecting to a personal computer or the like.

  Recently, while personal computers are becoming more common, portable data projector devices using liquid crystal panels, micromirror devices, etc. as image display elements have become widespread, connecting these personal computers and data projector devices, By executing presentation software on a personal computer and projecting and displaying it on a projector device, it is possible to more easily express a presentation more easily.

  When the presentation software is executed on the personal computer and projected on the projector device in this way, the screen content of the personal computer at that time is projected and displayed as it is on the projector device.

  Therefore, if the user decides that the projection will get in the way depending on the situation at the time of presentation, the projection of the image is temporarily stopped as necessary, and more specifically, by displaying the “black image”, While maintaining light emission from the light source lamp, it is necessary to stop projection in a pseudo manner, and is generally known as a “mute” function of a projected image. The following technologies are considered.

That is, this technique provides an image display light modulation element, a lamp that illuminates the light modulation element, and a lamp cooling lamp to provide a projector that further enhances the effect of the image mute function or the A (audio) / V (image) mute function. In an image display device having a fan, the display screen of the image display device is hidden or set to a predetermined display, and the setting by the image mute device and the cancellation of the setting Lamp output brightness adjusting means for adjusting the output brightness of the lamp is provided. (For example, Patent Document 1)
JP 2003-280087 A

  However, including the technique disclosed in Patent Document 1, the setting and cancellation of the mute operation of the projected image are both performed by the user's key operation. If necessary key operation is delayed or the key operation is forgotten. If this is the case, it is a matter of course that an image that the user does not want to project is projected and displayed on the screen screen.

  The present invention has been made in view of the above circumstances, and the object of the present invention is to be able to put some restrictions on the projection of images that are considered unnecessary, without imposing any burden on the user. To provide a projection device, a projection method, and a program.

According to the first aspect of the present invention, there is provided a projection apparatus for projecting and displaying on a separate projection target, a projection means for projecting and displaying a light image corresponding to input image data, and a place where the projection apparatus is installed Detection means for detecting the illuminance of the image, a determination means for comparing and determining the illuminance detected by the detection means with a preset threshold value, and a projection for controlling the projection display on the projection means in accordance with the determination result of the determination means Control means, and the projection control means temporarily stops the projection display of the optical image by the projection means according to the determination result of the determination means .

  According to the first aspect of the present invention, for example, when the projection state until then is temporarily stopped and the light of the room is turned on, by detecting the change in illuminance in the installation environment of the device, It is possible to automatically limit the projection of an image that seems unnecessary, without imposing a burden.

  Hereinafter, an embodiment in which the present invention is applied to a projector apparatus will be described with reference to the drawings.

  FIG. 1 shows an external appearance configuration of mainly a front surface and an upper surface of a housing of a projector device 10 according to the embodiment. As shown in the figure, a projection lens 12, a distance measuring sensor 13, and an Ir receiver 14 are disposed on the front surface of a rectangular parallelepiped main body casing 11.

  The projection lens 12 is for enlarging and projecting a light image formed by a spatial light modulation element composed of a micromirror element, which will be described later, onto an object such as a screen. Here, a focus position and a zoom position (projection) The angle of view) can be arbitrarily changed.

  The distance measuring sensor 13 is arranged in a direction orthogonal to each other so that one of the two pairs of phase difference sensors is in the horizontal direction and the other is in the vertical direction. Is measured along a one-dimensional detection line.

  The Ir receiver 14 receives an infrared light (Ir) modulation signal on which a key operation signal from a remote controller of the projector device 10 (not shown) is superimposed.

A key switch portion 15, a speaker 16, and an illuminance sensor 17 are disposed on the upper surface of the main body casing 11.
The key switch unit 15 includes, for example, a power key, AFK (Automatic Focus / Automatic Keystone correction) key, zoom key, input selection key, “brightness reference setting” key, cursor (“↑”) The “↓”, “←”, “→”) key, “Enter” key, and the like, and similar keys are also arranged on a remote controller (not shown) of the projector device 10.

  The speaker 16 emits a sound of the input audio signal and a beep sound during operation.

  The illuminance sensor 17 includes, for example, a phototransistor that is a light receiving element, a condenser lens, an amplifier circuit, and the like, and detects the illuminance under the environment where the projector apparatus 10 is installed.

Although not shown, an input / output connector portion, an Ir receiving portion, and an AC adapter connecting portion are disposed on the back surface of the main casing 11.
The input / output connector unit includes, for example, a USB terminal for connection to an external device such as a personal computer, a mini D-SUB terminal for video input, an S terminal, an RCA terminal, a stereo mini terminal for audio input, and the like. .

Similar to the Ir receiver 14, the Ir receiver receives an infrared (Ir) modulated signal on which a key operation signal from a remote controller (not shown) is superimposed.
The AC adapter connection unit connects a cable from an AC adapter (not shown) serving as a power source.

  Next, the functional configuration of the electronic circuit of the projector apparatus 10 will be described with reference to FIG. In the figure, image signals of various standards input from the input / output connector unit 21 are unified into image signals of a predetermined format by the image conversion unit 23 via the input / output interface (I / F) 22 and the system bus SB. Later, it is sent to the projection encoder 24.

  The projection encoder 24 develops and stores the transmitted image signal in the video RAM 25, generates a video signal from the stored contents of the video RAM 25, and outputs the video signal to the projection drive unit 26.

  The projection drive unit 26 is a high-speed time-division drive that appropriately multiplies a frame rate, for example, 60 [frames / second], the number of color component divisions, and the number of display gradations in accordance with the transmitted image signal. For example, the micromirror element 27 which is a spatial light modulation element (SOM) is driven to display.

  For this micromirror element 27, high-intensity white light emitted from a light source lamp 29 using, for example, an ultra-high pressure mercury lamp disposed in a reflector 28 is appropriately colored to a primary color via a color wheel 30, and light A light beam having a uniform luminance distribution in the tunnel 31 is irradiated after being totally reflected by the mirror 32, and a light image is formed by the reflected light, and is projected and displayed on a screen (not shown) through the projection lens 12. The

  However, both the lighting drive of the light source lamp 29 and the motor (M) 33 that rotationally drives the color wheel 30 operate based on the supply voltage value from the projection light processing unit 34.

  The control unit 35 controls all the operations of the above circuits. The control unit 35 includes a CPU, a non-volatile memory that stores an operation program executed by the CPU during a projection operation, a work memory, and the like.

  The control unit 35 is also connected to a distance measurement processing unit 36, an audio processing unit 37, and an illuminance detection unit 38 via the system bus SB.

  The distance measurement processing unit 36 controls and drives the distance measurement sensor 13 composed of the two pairs of phase difference sensors, and calculates the distance from the detected output to an arbitrary point position. The calculated distance value data is It is sent to the control unit 35.

  The sound processing unit 37 includes a sound source circuit such as a PCM sound source, converts the sound data given during the projection operation into analog data, drives the speaker 16 to emit a loud sound, or generates a beep sound or the like if necessary.

The illuminance detection unit 38 includes the illuminance sensor 17, detects the illuminance at the place where the projector device 10 is installed based on the control from the control unit 35, and outputs the detected illuminance to the control unit 35.
Each key operation signal in the key switch (SW) unit 15 is directly input to the control unit 35, and a signal from the Ir reception unit 39 is also directly input to the control unit 35. The Ir receiving unit 39 includes the Ir receiving unit 14 and an Ir receiving unit provided on the back side of the main body casing 11. The Ir receiving unit 39 converts the infrared modulation signal from the remote controller into a code signal and sends it to the control unit 35.

Next, the operation of the above embodiment will be described.
FIG. 3 shows the processing contents of the illuminance threshold setting executed by operating the “brightness reference setting” key of the key switch unit 15, and its operation control is basically executed by the control unit 35.

  Initially, the illuminance detection unit 38 including the illuminance sensor 17 detects the illuminance in the environment where the projector device 10 is installed (step S01), and the illuminance threshold value set at that time and the above-mentioned The detected illuminance at the installation position of the projector device 10 at that time is projected and displayed (step S02).

  FIG. 5 exemplifies the content of the “illuminance threshold setting” screen that is projected and displayed on the projection target screen from the projection lens 12 at this time, and the illuminance threshold setting range scale is displayed at the center of the screen. As indicated by the arrow PB, the brightness of the room where the current projector apparatus 10 detected in step S01 is displayed as indicated by the arrow PB, while the illuminance threshold TL set at that time is on the scale. Is displayed.

  FIG. 5 shows a state in which the illuminance threshold value TL is located on a brighter side than the arrow PB indicating the current indoor brightness. When the illumination is turned on, the threshold value is exceeded. This means that it is recognized that the projection state by the projector device 10 is temporarily stopped.

  When such an image is projected and displayed, it is determined whether any key operation is performed by the key switch unit 15 or the remote controller of the projector device 10 (step S03), and it is determined that there is no input operation. The process returns to the processing from step S01 again, and the input operation is waited.

  If there is any input operation, this is determined in step S03, and the illuminance threshold value changing operation is performed depending on whether the next operation is “←” or “→” in the cursor key. It is determined whether or not has been made (step S04).

  If it is determined that the illuminance threshold changing operation has been performed by the key operation, the threshold changing process including the display position movement of the illuminance threshold TL in the projection image shown in FIG. 5 is executed. (Step S05), the process returns to step S01 to prepare for the next input again.

  If it is determined in step S04 that the illuminance threshold value changing operation has not been performed, it is then determined whether or not an “Enter” key operation for instructing determination of the illuminance threshold value has been performed (step S06). .

  Here, when it is determined that the operated key is not the “Enter” key, it is determined that the key operation is invalid (NOP: No Operation), and the process returns to the processing from step S01 again, and the next key operation is performed. If it is determined that the user has operated the “Enter” key, the illuminance threshold value set at that time is stored and set in the nonvolatile memory inside the control unit 35 (step S07). This is the end of FIG.

  Next, assuming that the illuminance threshold value is stored in the control unit 35 as described above, the processing content when executing a normal projection operation will be described with reference to FIG.

  FIG. 4 shows a normal projection operation that starts when the power key is turned on and ends when the power key is turned off. The operation control is basically executed by the control unit 35.

  That is, at the beginning of power-on by turning on the power key, initial settings such as lighting of the light source lamp 29 and switching setting of input image data are performed (step E01).

  Thereafter, the illuminance detection unit 38 again detects the illuminance at the position where the projector device 10 is installed at that time (step E02), and compares the detected illuminance with the illuminance threshold stored in the control unit 35. Then, it is determined whether or not the detected illuminance at that time exceeds the illuminance threshold (step E03).

  Here, only when it is determined that the detected illuminance at that time exceeds the illuminance threshold, it is determined that the room is not an environment for projecting and displaying an image, and the micromirror element is used instead of the input image. 27, an image mute state in which the entire screen is black is set, and actual image projection is temporarily stopped (step E04).

  Thereafter, it is determined whether or not the detected illuminance is equal to or less than the illuminance threshold stored in the control unit 35 (step E05). Here, only when it is determined that the detected illuminance is equal to or less than the illuminance threshold stored in the control unit 35, the projection matching set up to that point is assumed to be an environment in which the room projects and displays images. It is assumed that the mute state of the image is canceled and the projected display according to the input image data is performed again (step E06).

  Then, after confirming that the power key has not been turned off (step E07), the process returns to step E02 again.

  In the process of repeatedly executing the processes in steps E02 to E07, the illuminance detection unit 38 detects the illuminance at that time, and if the detected illuminance exceeds a preset illuminance threshold, the mute state of the image is set. In addition, it is assumed that the image mute state is canceled at the timing when the illumination threshold value is reached or less, and the normal projection operation is resumed.

  If the power key is turned off, it is determined in step E07, and after post-processing including stopping the projection operation and after-cooling the light source lamp 29 (step E08), the above is performed. The process according to 4 ends.

  In this way, for example, when the projection state until then stops temporarily and the room lights up, the change in illuminance under the installation environment of the apparatus is detected, and the projector is compared with a preset threshold value, thereby determining the projector. The user of the apparatus 10 can be subjected to processing such as automatically muting projection of an image that seems unnecessary, without imposing any burden on the user.

  In this embodiment, since the user can arbitrarily variably set the illuminance threshold, it is possible to accurately detect a change in the image projection operation according to the user's preference and usage.

  In addition, since the threshold value can be set with reference to the illuminance detected at that time as shown in FIG. 5 at the time of setting, the environment in which the restriction is applied can be set more accurately.

  In the above embodiment, when the detected illuminance at the installation position of the projector device 10 exceeds the illuminance threshold, the projection image is muted to prevent an unnecessary image from being projected reliably. However, the present invention is not limited to this, and while the projection of the same image is intentionally continued, the projection light is dimmed (specifically, the luminance gradation of the projected image is lowered), and thus the relative By making the image projected on the screen extremely difficult to see, the projection operation continues, but the projection content does not stand out, and the atmosphere of the place is destroyed even during the presentation etc. Can be set so that there is no.

  In the above embodiment, it has been described that the display of the illuminance threshold value is performed by the projection image in FIGS. 3 and 5. However, the present invention is not limited to this, and the projector device 10 itself has a backlight, for example. A display unit made of a color liquid crystal panel or the like may be provided, and the illuminance threshold value may be set by displaying on the display unit.

  In addition, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention.

  Further, the above embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some constituent elements are deleted from all the constituent elements shown in the embodiment, at least one of the problems described in the column of the problem to be solved by the invention can be solved, and described in the column of the effect of the invention. In a case where at least one of the obtained effects can be obtained, a configuration in which this configuration requirement is deleted can be extracted as an invention.

1 is a perspective view showing an external configuration of a projector apparatus according to an embodiment of the present invention. 2 is a block diagram showing a functional configuration of the electronic circuit according to the embodiment. FIG. The flowchart which shows the specific processing content of the setting of the illumination intensity threshold value concerning the embodiment. 9 is a flowchart showing the processing contents of a projection operation corresponding to power on / off according to the embodiment. The figure which illustrates the projection image at the time of the setting of the illumination intensity threshold value concerning the embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Projector apparatus, 11 ... Main body casing, 12 ... Projection lens, 13 ... Distance measuring sensor, 14 ... Ir receiving part, 15 ... Key switch part, 16 ... Speaker, 17 ... Illuminance sensor, 21 ... Input / output connector part, 22 DESCRIPTION OF SYMBOLS Input / output interface (I / F), 23 Image conversion unit, 24 Projection encoder, 25 Video RAM, 26 Projection drive unit, 27 Micromirror element (SOM), 28 Reflector, 29 Light source lamp DESCRIPTION OF SYMBOLS 30 ... Color wheel, 31 ... Light tunnel, 32 ... Mirror, 33 ... Motor (M), 34 ... Projection light processing part, 35 ... Control part, 36 ... Ranging processing part, 37 ... Sound processing part, 38 ... Illuminance detection , 39... Ir receiver, SB... System bus.

Claims (5)

In a projection device that projects and displays on a separate projection target,
Projection means for forming and projecting a light image corresponding to input image data;
Detecting means for detecting the illuminance of the place where the projection apparatus is installed;
A determination means for comparing and determining the illuminance detected by the detection means with a preset threshold;
A projection control means for controlling the projection display by the projection means according to the judgment result by the judgment means ,
The projection control unit temporarily stops the projection display of the optical image by the projection unit according to the determination result of the determination unit. Further comprising threshold setting means for variably setting the threshold according to a user operation,
The projection apparatus according to claim 1, wherein the projection unit projects and displays both the current illuminance detected by the detection unit and the threshold value. Threshold setting means for variably setting the threshold according to a user operation;
The projection apparatus according to claim 1, further comprising display means for displaying both the current illuminance detected by the detection means and the threshold value. A projection method in a projection device that forms a light image corresponding to input image data and projects and displays it on a projection object separated from the image data,
A detection step of detecting the illuminance of the place where the projection device is installed;
A determination step of comparing and determining the illuminance detected in the detection step with a preset threshold value;
A projection control step of controlling the projection display of the optical image according to the determination result in this determination step ,
The projection control step temporarily stops the projection display of the optical image according to the determination result in the determination step . A program executed by a computer built in a projection apparatus that forms a light image corresponding to input image data and projects and displays the image on a projection object separated from the object,
A detection step of detecting the illuminance of the place where the projection apparatus is installed;
A determination step of comparing and determining the illuminance detected in the detection step with a preset threshold;
Causing the computer to execute a projection control step for controlling the projection display of the optical image in accordance with the determination result in this determination step ;
The projection control step temporarily stops the projection display of an optical image according to the determination result in the determination step .

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