JP5508723B2 - Projection device - Google Patents

Description

  The present invention relates to a portable projection device capable of projecting an image even when held with one hand, for example.

2. Description of the Related Art In recent years, projectors and the like have been devised to be portable in size with power saving and optical mechanism miniaturization.
In such a portable projector, it is disclosed that the main body is provided with an acceleration sensor or the like to detect the movement of the main body, and the setting contents related to the projection and the image file to be projected are selected according to the movement. (For example, refer to Patent Document 1).

However, in the technology disclosed in Patent Document 1 and the like, since the movement of the projector body is detected and the setting content is changed by the detected movement, even if it is portable, it can be placed on a table such as a desk. Is assumed to be transposed, and projection in a gripped state is not assumed.
For this reason, it is considered unsuitable for the purpose of easily projecting and enjoying an image.

In order to solve the above-mentioned problem, the invention described in claim 1 is characterized in that the first case, the first case and the rotary shaft are rotatably connected by a rotation shaft, and a direction parallel to the rotation shaft is defined as a projection direction. And a second case comprising a projecting unit having a projection optical axis at a position deviated from the center of the rotation axis,
When the second case rotates by a predetermined angle with respect to the first case around the rotation axis, the projection direction is the same as the rotation axis and a different elevation angle than when the second case does not rotate Is formed.

  According to the present invention, it is possible to project an image satisfactorily both when transposed and projected, and when held and projected with one hand.

It is a figure which shows the external view of the digital camera to which this invention is applied. It is a figure which shows the circuit structure of a digital camera. It is a flowchart which shows the operation example of a digital camera. It is a figure which shows the external appearance at the time of projection of a digital camera. It is a flowchart which shows the modification of operation | movement of a digital camera.

FIG. 1 is a diagram showing an external view of a digital camera (projection apparatus) 1 to which the present invention is applied, in which (A) is a front view, (B) is a top view as viewed from A in (A), and (C). (A) is the side view seen from B, (D) is a rear view.
The digital camera 1 includes a main body portion (first case) 3 and a camera portion (second case) 2. The camera portion 2 moves the arrow B in FIG. As a rotation axis, it is connected to be able to swivel (rotate) in the front-back direction, and independently of the display direction of the display unit 11, the imaging direction of the imaging unit 14 can be arbitrarily adjusted.
The camera unit 2 includes an imaging lens 4 having an imaging direction in a direction orthogonal to the rotation axis, a light source unit 5 for flash, and a projection lens 10 having a projection optical axis in a direction parallel to the rotation axis. It has been shifted to a slightly higher position.

On the other hand, the main body 3 includes a power key 6, a shutter key 7, an output destination changeover switch 8, a plate member 9, a display unit 11, a mode key 12, and a speaker 13.
The power key 6 detects a pressing operation to supply power to the entire digital camera 1, and the shutter key 7 is in a power-on state and has a shooting mode such as a camera mode or a movie mode. During execution, when a pressing operation is detected, the captured image or video is filed and stored.
The output destination changeover switch 8 has a slide mechanism that slides in two positions. Then, in the playback mode, whether the image (video) is played back and displayed on the display unit 11 or output via the projection lens 10 is determined according to the position where the switching key 8 is slid.

In order to tie accessories such as a strap, the plate-like member 9 extends the band-like member around the main body 3 to the left side in FIGS. 1 (A) and 1 (B). ) On the lower side (that is, the front side, the left side in FIG. 1C) so as to protrude to C beyond the thickness of the main body 3.
The display unit 11 performs live view display of an image taken cyclically via the imaging lens 4 when executing a mode for shooting such as a camera mode or a movie mode, and a playback mode. When the output destination is the display unit 11, image (video) data based on the stored image file is reproduced and displayed.
The mode key 12 has a slide mechanism that slides in three positions. Then, whether the current mode is any one of the camera mode, the movie mode, and the reproduction mode is determined according to the position where the mode key 12 is slid.
In the playback mode, the speaker 13 outputs music data added to the data to be played back.

FIG. 2 is a diagram illustrating a circuit configuration of the digital camera 1. In the figure, the digital camera 1 includes an imaging lens 4, a flash light source unit 5, a key input unit 19 (power key 6, shutter key 7, output destination changeover switch 8, and mode key 12), a display unit 11. In addition to the speaker 13, the imaging unit 14, the A / D conversion / signal processing unit 15, the optical engine 16, the projection light source unit 17, the display control unit 18, the audio output unit 20, the rotation angle detection unit 21, and the image processing Unit 22, control unit 23, program memory 24, work memory 25, and recording medium 26.
The imaging unit 14 includes an imaging device such as a CCD or CMOS, and a driver that drives and controls these imaging devices. The imaging unit 14 sweeps out the electric charge accumulated in the imaging device at a predetermined period and supplies it to the A / D conversion / signal processing unit 15. Output. The A / D conversion / signal processing unit 15 converts the charge, which is analog information, into digital data, performs noise removal processing, and the like, and outputs it to the image processing unit 22. The optical engine 16 includes an image forming element 161 including a DMD element and a color wheel, and controls the image forming element 161 to generate image (video) data to be projected and change the vertical and horizontal directions. The projection light source unit 17 includes a small, high-luminance white light-emitting element such as an LED.

The display control unit 18 includes a display buffer and a display driver, and outputs the image (video data) output from the image processing unit 22 to the display unit 11.
When the audio data is added to the image (video data) to be reproduced, the audio processing unit 20 decodes the audio data into analog data and outputs it from the speaker 13.
The rotation angle detection unit 21 detects rotation of a predetermined angle with respect to the main body unit 3 of the camera unit 2.
The image processing unit 22 compresses and encodes the image data output from the A / D conversion / signal processing unit 15 in the camera mode and the movie mode, generates an image file, stores the image file in the recording medium 26, and plays back the image data. In the mode, the image file (including moving images) read from the recording medium 26 is decoded and output to the optical engine 16 and the display control unit 18.
The control unit 23 has a function of controlling the entire circuit included in the digital camera 1.
The program memory 24 is a storage unit that stores a program that is loaded and executed by the control unit 23. The work memory 25 has a function as a work memory that temporarily stores data generated in the process of control by the control unit 23.

FIG. 3 is a flowchart illustrating an operation example performed by the control unit 23 of the digital camera 1.
First, at the start (power ON state), it is determined whether the camera mode, the movie mode, or the playback mode is set in the digital camera 1 by the user's slide operation of the mode key 12 (step S1).
When the camera mode and the movie mode are set, the process proceeds to step S12, and by determining the slide position of the output destination changeover switch 8, further images (videos) are set when the playback mode is set. ), Whether the display unit 11 is selected as the output destination or whether the output by projection is selected (step S2).

When the output is selected by projection based on the determination in step S2, the light source for projection light source unit 17 is turned on and the operation of optical engine 16 is started (step S3).
Then, the image file (or moving image file) stored in the recording medium 26 is sequentially read out and input to the image processing unit 22 (step S4), and the image data (moving image data) decoded by the image processing unit 22 is optically converted. The images are sequentially output to the image forming element 161 of the engine 16 (step S5).
At this time, in the digital camera 1, the camera unit 2 has a rotation angle of 0 degrees with respect to the main body unit 3, and the back surface of the main body unit (that is, the surface on which the display unit 11 is provided: the back surface in FIG. It is assumed that the plate member 9 is gripped with the upper surface of the figure as the upper surface and image data is projected from the projection lens 10.
In this case, assuming that the normal image (video) aspect ratio is horizontal: vertical = 4: 3, the image data is projected and output with the front and back surfaces of the main body 3 as the horizontal direction.
Therefore, an image can be projected and output in a state suitable for gripping.

Then, it is determined whether or not the rotation angle detection unit 21 detects that the camera unit 2 has rotated 90 degrees with respect to the main body unit 3 (step S6).
If it is not detected in step S6 that the image has been rotated by 90 degrees, the process returns to step S4 again. If it is detected that the image has been rotated by 90 degrees, the image data (moving image data) decoded by the image processing unit 22 is detected. , The image processing is performed in consideration of the distortion of the projection plane caused by the digital camera 1 being transferred to a desk or the like, and sequentially output to the image forming element 161 of the optical engine 16 (step S7).
At this time, in the digital camera 1, as shown in FIG. 4, the camera unit 2 has a rotation angle of 90 degrees with respect to the main body unit 3, and is transferred to a desk or the like with the plate-like member 9 as the bottom surface. It is assumed that image data is projected from 10 at an elevation angle D.

In this case, if the normal image (video) aspect ratio is set to horizontal: vertical = 4: 3, the aspect ratio is switched with respect to the camera unit 2, but the front and back surfaces of the main body unit 3 are in the horizontal direction. Project the data.
Therefore, in transposition, an image can be projected and output in a stable state. Further, when the plate-like member 9 comes into contact with the desk or the like, the main body 3 is stably transferred, and the surface of the main body 3 is not damaged.
Then, it is determined whether or not the playback mode is detected by the user's slide operation of the mode key 12 (step S8).
If no mode omission is detected, the process returns to step S4. If mode omission is detected, the process returns to the start state of the flowchart.
On the other hand, when output to the display unit 11 is selected by the determination in step S2, image files (or moving image files) stored in the recording medium 26 are sequentially read out and input to the image processing unit 22 (step S9), and further images are displayed. The image data (moving image data) decoded by the processing unit 22 is sequentially output to the display control unit 18 (step S10).

Further, it is determined whether or not the playback mode is detected by the user's slide operation of the mode key 12 (step S11).
If no mode omission is detected, the process returns to step S9. If mode omission is detected, the process returns to the start state of the flowchart.
If it is determined in step S1 that the camera mode and the movie mode are set in the digital camera 1 by the user's slide operation of the mode key 12, the imaging unit 14 and the A / D conversion / signal processing unit 15 are started to operate. (Step S12), an image captured cyclically via the imaging lens 4, the imaging unit 14, and the A / D conversion / signal processing unit 15 is displayed in live view on the display unit 11 (Step S13), and the shutter It is determined whether or not the pressing operation of the key 7 has been detected (step S14).
When the pressing operation of the shutter key 7 is detected, the electric charge accumulated in the imaging device of the imaging unit 14 at that time is swept out as an imaged image, output to the A / D conversion / signal processing unit 15, and further the A / D The digital data is converted into digital data by the D conversion / signal processing unit 15 and subjected to noise removal processing, etc., and output to the image processing unit 22, and the image processing unit 22 is output from the A / D conversion / signal processing unit 15. The image data is compression-encoded and an image file is generated and stored in the recording medium 26 (step S15).

In the movie mode, when the first pressing operation of the shutter key 7 is detected, the charges accumulated in the image sensor of the imaging unit 14 from that point in time are sequentially swept out as an image to be A / D converted / signaled. The data is output to the processing unit 15, further converted into digital data by the A / D conversion / signal processing unit 15, subjected to noise removal processing, etc., and sequentially output to the image processing unit 22, and the image processing unit 22 The image data output from the conversion / signal processing unit 15 is sequentially compressed and encoded as a frame image and stored in the storage medium 26. Then, by detecting the second pressing operation of the shutter key 7, a moving image file including a frame image obtained as a result of imaging until that time is generated, and the recorded contents of the storage medium 26 are updated.
On the other hand, if the pressing operation of the shutter key 7 is not detected in step S14, it is determined whether or not the camera mode or movie mode mode is detected by the user's sliding operation of the mode key 12 (step S14). S16).
If no mode omission is detected, the process returns to step S13. If mode omission is detected, the process returns to the start state of this flowchart.

(Modification)
In the above-described embodiment, whether the output destination of the image data is the display unit or the output by projection is set according to the slide position of the output destination changeover switch 8, but the rotation angle is not limited to this. By detecting that the detection unit 21 has rotated 90 degrees, the reproduction output to the display unit 11 and the output by projection may be automatically switched.
FIG. 5 is a flowchart showing an operation example of the digital camera 1 in this case.
First, at the start (power ON state), it is determined whether the camera mode, the movie mode, or the playback mode is set in the digital camera 1 by the user's slide operation of the mode key 12 (step S1).

When the camera mode and the movie mode are set, the process proceeds to step S12, and the slide position of the output destination changeover switch 8 is determined. When the playback mode is set, the recording medium 26 is set. The stored image files (or moving image files) are sequentially read and input to the image processing unit 22 (step S21). Thereafter, it is determined whether or not the rotation angle detection unit 21 detects that the camera unit 2 is rotated 90 degrees with respect to the main body unit 3 (step S22).
If it is detected that the rotation is 90 degrees, the projection light source unit 17 is turned on while the optical engine 16 is started to operate (step S23). The decoded image data (moving image data) is rotated by 90 degrees, and image processing is performed in consideration of distortion of the projection plane caused by transposing the digital camera 1 to a desk or the like, and sequentially applied to the image forming element 161 of the optical engine 16. Output (step S24).

On the other hand, if it is not detected that the image is rotated 90 degrees in step S22, the image data (moving image data) decoded by the image processing unit 22 is sequentially output to the display control unit 18 (step S26).
Then, during the processing of steps S24 and S26, it is determined whether or not the mode loss of the playback mode is detected by the user's slide operation of the mode key 12 (step S25).
If no mode omission is detected, the process returns to step S21. If mode omission is detected, the process returns to the start state of this flowchart.

  According to this modification, even when image data is reproduced and displayed on the display unit 11, the digital camera 1 is deformed into a shape as shown in FIG. Thus, it is not necessary to provide the output destination changeover switch 8, and the usability can be further improved.

DESCRIPTION OF SYMBOLS 1 Digital camera 2 Camera part 3 Main body part 8 Output destination changeover switch 9 Plate-shaped member 10 Projection lens 12 Mode key 14 Imaging part 16 Optical engine 21 Rotation angle detection part 22 Image processing part 23 Control part 24 Program memory 26 Recording medium 161 Image Forming element

Japanese Laid-Open Patent Publication No. 2008-275896

Claims (3)

The first case,
The first case includes a projection unit that is rotatably connected to the first case by a rotation axis, and that has a projection direction that is a direction parallel to the rotation axis and a position that deviates from the center of the rotation axis. 2 cases,
With
When the second case rotates a predetermined angle with respect to the first case around the rotation axis, the projection direction is the same as the rotation axis and an elevation angle different from that when the second case does not rotate. Forming,
A projection apparatus characterized by that. Storage means for storing image data;
Determining means for determining whether or not the second case has rotated a predetermined angle with respect to the first case around the rotation axis;
When it is determined that the projection unit has rotated by a predetermined angle, the switching unit switches the vertical and horizontal directions of the image to be projected by the projection unit;
Projection control means for reading out the image data stored in the storage means in the vertical and horizontal directions switched by the switching means and controlling the projection by the projection means;
The projection apparatus according to claim 1, further comprising: The second case further includes an imaging unit whose imaging direction is a direction orthogonal to the rotation axis,
The projection apparatus according to claim 1 , further comprising a storage control unit configured to control image data based on an image captured by the imaging unit to be stored in the storage unit.

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