JP5343407B2 - projector - Google Patents

Description

  The present invention relates to a projector that projects an image on a screen or the like.

Conventionally, this type of invention includes a dazzling prevention function that prevents a person looking into the projection lens from dazzling, as described in Patent Document 1, for example. This dazzling prevention function is to reduce the intensity of light for projecting a normal image when an object present in the projection area is detected by an infrared sensor.
As another example of the dazzling prevention function, in the invention described in Patent Document 2, an object existing in the projection area is detected by a CCD camera, and the projection light is dimmed according to the detected image pattern. The projection light is turned off, the image is muted, the apparatus power is turned off, and the like.

However, in any of the above prior arts, when the anti-dazzle function is activated, the light for projecting the normal image suddenly dims or turns off, which may confuse the projector operator or viewer. There is a fear. That is, there are cases where the operator, viewer, or the like is confused about what action or operation should be performed.
JP 2005-258292 A JP 2007-233076 A

The present invention has been made in view of the above-described conventional circumstances, and an object of the present invention is to provide a projector that can reduce an operator, a viewer, and the like from being confused by the operation of a dazzling prevention function. It is in.

The technical means for solving the above-described problem is a projector that projects an image at a distant position, a detection unit that detects a person existing in the projection area, and a dazzling prevention according to the detection of the person by the detection unit Dazzling prevention means for performing processing, and a restart switch for stopping the processing by the dazzling prevention means and restarting projection of a normal image, and the dazzling prevention means, when the detection unit detects a person, Instead of projecting the normal image, a mute image indicating that the projection of the normal image has been stopped is projected, and the display is switched to a display prompting the operation of the restart switch.
According to this technical means, when a person existing in the projection area is detected by the detection unit, a mute image indicating that the projection of the normal image is stopped is displayed instead of displaying the normal image, and the restart switch is set. The display is switched to prompt the operation. Therefore, the operator, the viewer, and the like are less confused and can resume normal image projection by operating the restart switch as necessary.

In a further technical means, the dazzling prevention means projects an image indicating that the projection of the normal image is stopped at a predetermined position in the projection area as the mute image, and projects to a part other than the image. It is characterized by dimming.
According to this technical means, when the dazzling prevention means functions, an image indicating that the projection of the normal image is stopped is displayed at a predetermined location in the projection area, and the display of other portions is dimmed. Accordingly, it is possible to improve the dazzling mitigation effect for those who enter the projection area.

In a further technical means, the dazzling prevention means projects an image prompting the operation of the restart switch as the mute image.
According to this technical means, when the dazzling prevention means is executed, an image that prompts the operation instruction of the restart switch is displayed. Therefore, the display of this image can effectively confuse the operator and the viewer. Can be reduced. That is, an operator, a viewer, and the like can operate the restart switch as needed without being confused by looking at the mute image.

In a further technical means, the dazzling prevention means blinks or lights the light emitting body provided in the vicinity of the restart switch itself or in the vicinity of the restart switch as a display for prompting the operation of the restart switch. .
According to this technical means, when the dazzling prevention means is executed, the operator or viewer is prompted to operate the restart switch by blinking or lighting the light emitter, and the operator or viewer is confused. Can be effectively reduced.

Further technical means includes child lock means for disabling some operations on the projector when a specific operation is performed, and the dazzling prevention means is executed only when the child lock means is executed. It was made to do.
According to this technical means, for example, when the viewer has many children or the like, if the child lock means is executed, the projector can be prevented from being mischievously operated by the child or the like, and the dazzling prevention means can be prevented. Therefore, it is possible to prevent a child or the like from being dazzled by removing the projection lens.

In a further technical means, an image reproducing device that reproduces image data stored in a storage medium as the normal image is integrally provided, and the image reproducing device is stopped when the dazzling prevention means is executed, When the restart switch is turned on, the processing by the dazzling prevention means is stopped and the reproduction of the image data by the image reproduction device is resumed.
According to this technical means, the dazzling prevention means and the image reproduction device are linked together to quickly stop the reproduction of the image reproduction device accompanying the execution of the dazzling prevention means and the resumption of the reproduction of the image reproduction device due to the ON operation of the restart switch. Can be done.

In a further technical means, when the restart switch is turned on, the processing by the dazzling prevention means is stopped, and the reproduction of the image data by the image reproduction device is stopped or stopped halfway. It is characterized in that it is restarted from a point in time before the predetermined point.
According to this technical means, the dazzling prevention means and the image reproduction apparatus can be turned on / off in conjunction with each other, and the reproduction by the image reproduction apparatus is performed for a predetermined time from the image at the time when the reproduction is stopped or when the reproduction is stopped halfway. It is possible to restart from the image at the previous time point, and as a result, it is possible to reduce the stress on the operator or viewer due to the stop of the projection of the normal image.

In a further technical means, the image reproducing device is a DVD player.
According to this technical means, the image reproducing apparatus can be set to a specific aspect with good productivity.

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

FIG. 1 shows the external appearance of the projector 1. The projector 1 includes an image reproducing device 1
a and a main body 1b that is rotatably mounted on the upper surface of the image reproducing apparatus 1a.
The image reproducing device 1a is a so-called DVD recorder that reads and reproduces image data recorded on the DVD 4.
The main body 1b stops the processing by the projection optical system 31, the detection unit 40 that detects a person existing in the projection area by the transmission element 41 and the reception element 42, and the dazzling prevention means, and resumes the projection of the normal image. A restart switch 51, an operation switch 52 other than the restart switch 51, and the like are provided.
The projection area means an area where projection light is projected in a space from the projection optical system 31 of the projector 1 to the projection screen.

FIG. 2 is a block diagram showing the configuration of the projector 1.
The projector 1 includes a CPU 10, a display image signal processing unit 20, and a display image temporary storage unit 2.
1, a light modulation element driving unit 22, a mute image storage unit 23, an image reproduction device 1 a, an image projection unit 30, a detection unit 40, a sensor control unit 43, a control signal processing unit 50, and the like. Then, an image input from the image reproducing device 1a, an external personal computer 2 or the like is projected onto the screen 3 at a remote position.

Further, the projector 1 functions as a program for causing the CPU 10 to function, and a child lock means for invalidating a part of the operation of the projector 1 when a specific operation is performed, and dazzling prevention according to a detection signal from the detection unit 40. Dazzling prevention means for performing processing for the purpose.

The CPU 10 is connected to the display image signal processing unit 20 and the sensor control unit 43 via the CPU bus 11.
The control signal processing unit 50 and the like are controlled to control the operation of the projector 1.

The display image signal processing unit 20 appropriately performs image processing on the normal image data received from the personal computer 2 or the image reproduction device 1a, and supplies a control signal based on the image data to the light modulation element driving unit 22. The display image temporary storage unit 21 is a memory that temporarily writes and reads image data for the image processing.
When the detection unit 40 detects the person P in the projection area, the display image signal processing unit 20 reads the mute image M from the mute image storage unit 23 instead of the normal image data, and the mute image M Is supplied to the light modulation element driving unit 22. In addition,
The light modulation device may be anything such as a transmission type or a reflection type, and the type thereof is not limited.

The image projection unit 30 includes a projection optical system 31, a light modulation element 32, an illumination optical system 33, and the like, and drives the light modulation element driving unit 22 by a control signal from the display image signal processing unit 20, as well as illumination. The light emitted from the optical system 33 is sequentially passed through the light modulation element 32 and the projection optical system 31. Therefore, the light emitted from the illumination optical system 33 is modulated when passing through the light modulation element 32, enlarged by the projection optical system 31, and projected onto the screen 3.

FIG. 3 shows an example of the mute image M projected on the screen 3. The mute image M projects the resume switch image m1 as an image indicating that the projection of the normal image has stopped on the upper side of the projection area and prompting the operation of the resume switch 51, and the area other than the resume switch image m1 ( According to FIG. 3, the hatched portion) is set as the dimming region m2.
According to the illustrated preferred example, the restart switch image m1 is an image showing the appearance of the restart switch 51 and is a figure showing a substantially triangular play switch.
Other examples of the restart switch image m1 may be a figure indicating a pause switch (pause button), other figures, patterns, characters, and the like.
The dimming area m2 may be an area in which a portion other than the restart switch image m1 is displayed in black by the light modulation element 32. Another example of the dimming area m2 may be a pattern with a relatively small amount of light.

According to the mute image M, since the projection area other than the upper-side restart switch image m1 is the dimming area m2, it is possible to prevent dazzling particularly for a short person such as a child.
If the viewer is only an adult, an image indicating that the projection of the normal image has been stopped as the mute image M (resumed switch image m1 in the illustrated example) is arranged on the upper side of the projection area. In some cases, dazzling inconvenience may occur. Therefore, the projection position of the image indicating that the projection of the normal image has been stopped (in the illustrated example, the restart switch image m1) may be set in advance on the menu screen, for example. For example, as shown in FIG. 4, an image indicating that the projection screen is divided into nine parts and the projection of the normal image is stopped (the restart switch image m <b> 1 according to the illustrated example).
May be set to which of the nine divided screens (up / down / left / right of the projection area). This prevents dazzling depending on the user's situation,
Convenience can be further enhanced.

The detection unit 40 may be configured to be able to detect a person existing in the projection area by the projection optical system 31. For example, the detection unit 40 transmits an ultrasonic signal from the transmission element 41, and the ultrasonic signal hits an object and is reflected. An ultrasonic sensor that receives the reflected wave at this time by the receiving element 42 is used.
The sensor control unit 43 supplies power to the detection unit 40 and captures a detection signal from the detection unit 40.

The control signal processing unit 50 causes the CPU 10 to function according to a signal input from the restart switch 51 or the operation switch 52, or supplies power to a light emitter of the restart switch 51 described later.

The restart switch 51 is a switch that integrally transmits a light-emitting body (for example, a light-emitting diode) that transmits an on-off signal to the control signal processing unit 50 and blinks or lights when the control signal processing unit 50 is turned on.
The operation switch 52 is a switch for performing basic operations of the projector 1, such as a power switch, a play switch, a stop switch, a pause switch, and the like.
Note that the restart switch 51 of FIG. 1 can be omitted by combining the function of the restart switch 51 with some of the switches of the operation switch 52. In this case, it is preferable that the some switches are switches that are not used during normal projection (for example, play switches).

The child lock means is a program that is stored in a storage device (not shown) and causes the CPU 10 to function. When the predetermined operation is performed on the operation switch 52 in advance, a part of the operation on the projector 1 is performed. While invalidating, the dazzling prevention means mentioned later is performed.
The specific operation may be, for example, an operation of pressing and holding the power switch for a predetermined time, a simultaneous operation of two or more switches, or the like. As another example, a dedicated child lock switch may be provided, and the child lock means may be executed by operating the child lock switch.

The dazzling prevention means is a program that is stored in a storage device (not shown) and causes the CPU 10 to function. When there is a detection signal from the detection unit 40, the dazzling prevention means indicates that the projection of the normal image is stopped instead of the normal image projection. The displayed mute image M is projected, and the display is switched to a display prompting an operation instruction of the restart switch 51.

FIG. 6 is a flowchart for explaining processing by the dazzling prevention means.
First, in step 1, it is determined whether or not the normal image is being projected. If the normal image is being projected, the process proceeds to the next step 2, and if not, the flowchart is ended.
That is, the dazzling prevention means is executed only during normal image projection. Here, the normal image means an image projected by the projector 1 based on image data taken in from a personal computer, the image reproduction apparatus 1a, etc., regardless of whether it is external or internal, and is a moving image or a still image. Including cases. This normal image does not include a mute image.

Next, in step 2, it is determined whether or not the child lock means is being executed by a specific operation on the operation switch 52. If it is being executed, the process proceeds to the next step 3,
Otherwise, the step 2 is repeated until the child lock means is executed (waiting until the child is locked). That is, the dazzling prevention means is executed only when the child lock means is executed by a specific operation on the operation switch 52.

Although not shown in the flowchart, when the child lock means is executed, some operations on the projector 1 are disabled, for example, the operation on the stop switch is disabled.

In step 3, the presence or absence of a detection signal by the detection unit 40 is determined.
That is, if the presence of a person is detected in the projection area, the process proceeds to the next step 4; otherwise, the process of step 3 is repeated (the process waits until a person is detected).

In step 4, the projection of the normal image is stopped. For example, if it is a normal image by the image reproduction device 1a built in the projector 1, the image reproduction device 1a is temporarily stopped. If the image is a normal image from an external device such as a personal computer 2 or an external image reproduction apparatus, the image data is continuously output by the external device, but the projector 1 is set to a state in which the image data is not projected.

In step 5, image data of the mute image M is called from the mute image storage unit 23 to the display image signal processing unit 20, and a control signal based on this image data is supplied to the light modulation element driving unit 22. Therefore, the mute image M illustrated in FIG. 3 is displayed on the screen 3 instead of the normal image.

In step 6, the display is switched to prompting the operation of the restart switch 51. More specifically, the light emitter incorporated in the restart switch 51 is turned on or blinked.

Accordingly, the operator, the viewer, and the like can restart the resume switch image m1 displayed on the screen 3.
And the light emission of the restart switch 51, it is recognized that the switch for restarting the normal image is the restart switch 51.

Next, in step 7, it is determined whether or not the resume switch 51 is turned on. If the resume switch 51 is turned on, the process proceeds to step 8, and if not, the process waits for an on operation for the resume switch 51.

In step 8, the projection of the mute image M is stopped.
In step 9, the display of the restart switch 51 is returned to the original state where the light emitter is turned off.

In step 10, the pause state of the image playback device 1a built in the projector 1 is released. Therefore, the reproduction of the image data by the image reproducing device 1a is resumed from the time when it was temporarily stopped in the step 4. Then, the process returns to step 2.

(Modification 1)
According to the one embodiment, as a display for prompting the operation instruction of the restart switch 51, the light emitter provided in the restart switch 51 itself blinks or lights up, but the light emitter is provided in the vicinity of the restart switch 51, You may make it this light-emitting body blink or light.

(Modification 2)
According to the one embodiment, the detection unit 40 is an ultrasonic sensor so as to be able to detect a person existing in a relatively wide range in the projection area, but an infrared sensor using infrared as a sensing medium,
It is also possible to adopt a configuration in which a person existing in the projection area is imaged and sensed by a CCD camera.

(Modification 3)
According to the above-described embodiment, as a preferable example of the mute image M, the image of the restart switch 51 is projected on the upper side of the projection area. However, the mute image M indicates that the projection of the normal image is stopped. As shown, it can be an appropriately designed image.

(Modification 4)
According to the above-described embodiment, a DVD player is given as an example of an integrally provided image reproducing device. Other examples of the image reproducing device include a video recorder, a laser disk player, and a storage medium other than a DVD. For example, a device that reproduces image data stored in a USB memory, an SD card, or the like.

(Modification 5)
According to the above-described embodiment, the reproduction by the image reproduction device 1a is resumed from the point where the reproduction is stopped halfway in Step 10, but the reproduction by the image reproduction device 1a is resumed from a point before a predetermined time before the reproduction is stopped halfway. You may make it do.

(Modification 6)
According to the above embodiment, the output of image data from the external device such as the personal computer 2 is continued in step 4, but the external device is controlled by the control signal output from the projector 1. In step 4, the output of the image data by the external device is stopped halfway, and in step 10, the output of the image data is restarted from the time when it was stopped halfway or a predetermined time before the time when it was stopped halfway. Is also possible.

(Modification 7)
According to the one embodiment, the figure showing the substantially triangular play switch is illustrated as the resume switch image m1, but the resume switch image m1 includes both the play switch and the pause switch as shown in FIG. In this case, the restart switch 51 of the projector 1 is also a figure that shows the play switch and the pause switch together.
In addition, the restart switch image m1 of the mute image M shown in FIG. 4 can also be a figure that shows the play switch and the pause switch together as described above.
The restart switch image m1 is not limited to the illustrated example, and may be another image, a character, a pattern, or the like.

1 is a perspective view showing an example of a projector according to the present invention. The block diagram which shows the structure on the electric circuit of the projector. The figure which shows an example of a mute image. The figure which shows the other example of a mute image. The figure which shows the other example of a mute image. The flowchart which shows an example of the process by a dazzling prevention means.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1: Projector, 1a: Image reproduction apparatus, 1b: Main part, 40: Detection part, 51: Restart switch, 52: Operation switch, M: Mute image, m1: Restart switch image, m2: Dimming area

Claims (7)

A projector that projects an image at a distant position,
A detection unit that detects a person existing in the projection area, a dazzling prevention unit that performs processing for preventing dazzle according to the detection of the person by the detection unit, and the processing by the dazzling prevention unit is stopped to project a normal image. A resumption switch for resuming operation, and a child lock means for disabling some operations on the projector ,
The dazzling prevention means is executed when the child lock means is executed, and when the detection unit detects a person, instead of projecting the normal image, the projection of the normal image is stopped. A projector that projects a mute image to be displayed and switches to a display that prompts the user to operate the restart switch.   The dazzling prevention means projects, as the mute image, an image indicating that projection of the normal image has been stopped at a predetermined location in a projection area, and reduces projection to a portion other than the image. The projector according to claim 1.   The projector according to claim 1, wherein the dazzling prevention unit projects an image prompting an operation of the restart switch as the mute image.   The dazzling prevention means blinks or lights up the light-emitting body provided in the vicinity of the restart switch itself or the restart switch as a display prompting the operation of the restart switch. Item 1. The projector according to item 1. An image reproducing apparatus that reproduces image data stored in a storage medium as the normal image is integrally provided. When the dazzling prevention means is executed, the image reproducing apparatus is stopped, and the restart switch is turned on. the image reproducing apparatus according to claims 1 to 4 projector according to any one of to, characterized in that so as to resume the reproduction of the image data stops the processing by the dazzle prevention means when the. When the restart switch is turned on, the processing by the dazzling prevention means is stopped, and the reproduction of the image data by the image reproduction device is stopped halfway or a predetermined time before the halfway stop. 6. The projector according to claim 5 , wherein the projector is restarted from the point of time. Claim 5 or 6 projector wherein said image reproduction device is a DVD player.

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