JP2007298665A - Projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projector having an illuminating angle correction system capable of easily correcting an illuminating direction by using an external device. <P>SOLUTION: The projector includes: a screen 108 for projecting a picture on it; an emitting section 100 having a lens capable of projecting a picture on the screen and a rotating shaft for changing an emitting direction; infrared ray emitting device 107 attached to the screen and used for emitting an infrared ray; an infrared ray detecting section 101 for receiving an infrared ray emitted from the infrared ray emitting device; a plurality of detection panels 106 disposed within the infrared ray detecting section and at an angle to a horizontal face; a level determining section 102 for determining the level of the infrared ray detected by the detection panels; and a control section 103 for controlling the rotating shaft according to the level of the infrared ray. In this configuration, it is possible to easily correct displacement of an image caused by forward, backward, leftward or rightward inclination to the screen. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a system and a projection angle correction method for projecting an image on a screen using a projection device and easily correcting an irradiation angle of an entire image projected on the screen.

In a system for projecting an image on a screen using a conventional projector, if the left and right or top and bottom projection angles are shifted, the projected image has a difference in sharpness between left and right or top and bottom. Conventionally, the user who uses the projector changes the position and angle of the projector main unit or the screen main unit by adjusting the position and angle of the projector main unit by looking at the sharpness of the upper, lower, left and right images projected from the projector to the screen. It was. Moreover, what adjusts an irradiation direction is known.
JP 2003-57743 A

  However, there is a problem in that a plurality of infrared irradiation units arranged on the screen have to be detected and the arrival time difference between the plurality of infrared rays must be detected, and the irradiation direction cannot be easily estimated and the irradiation direction cannot be corrected. In addition, there is a problem that there is no simple irradiation angle correction system in a small projector system that does not require precise image correction.

  The present invention has been made to solve such a problem, and an object thereof is to easily estimate an irradiation direction and correct the irradiation direction.

In order to achieve the above object, a projector having the illumination angle correction system of the present invention provides
From a screen for projecting an image, a lens capable of projecting an image on the screen and an irradiation unit having a rotation axis for changing the irradiation direction, an infrared irradiation device for irradiating infrared light attached to the screen, and the infrared irradiation device An infrared detector that receives the irradiated infrared rays; a detection panel that is disposed inside the infrared detector and has an angle with respect to a horizontal plane; and a level determination unit that determines an infrared level detected by the detection panel; And a control unit that controls the rotating shaft in accordance with the level of infrared rays determined by the level determination unit.

  With this configuration, the detection panel at the maximum level on which infrared rays are incident becomes a horizontal plane with the screen, the horizontal plane with the screen can be easily estimated, and the irradiation unit is used to correct the image irradiated from the projector in the horizontal direction. By controlling the rotation axis, the irradiation direction is corrected, and the image displayed on the screen becomes a correct image with the irradiation direction corrected.

  In addition, the infrared irradiation device for irradiating infrared rays attached to the screen of the projector having the irradiation angle correction system of the present invention is equipped with a light receiving element, and only when receiving light such as image light from the projector. A configuration in which infrared rays are irradiated is also possible.

  With this configuration, when a certain amount of image light does not hit the screen, the infrared irradiation device does not operate, so that the power consumption of the infrared irradiation device can be reduced.

  With the above configuration, the irradiation angle correction system of the present invention makes it possible to easily correct the irradiation direction, and it is not an expensive correction system having precise image correction like a large projector, but rather precise image correction. A simple projector that does not need to be provided, such as a device in which a small projector is mounted on a mobile phone, is small in screen size, and the device itself is not fixed (it moves when a certain amount of force is applied) It is advantageous for correcting the irradiation direction of a system that does not require precise image correction, and can easily determine the irradiation direction, which is advantageous for a small projector.

(Embodiment 1)
Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a configuration diagram of a projector in Embodiment 1 of the present invention.

A projector according to a first embodiment of the present invention includes a screen 108 for projecting an image, a lens capable of projecting an image on the screen, an irradiation unit 100 having a rotation axis for changing the irradiation direction, and infrared rays attached to the screen. Infrared irradiating device 107 for irradiating, infrared detecting unit 101 for receiving infrared rays irradiated from the infrared irradiating device, detection panel 106 in the infrared detecting unit, having an angle with respect to a horizontal plane, and a plurality of detection panels 106, and detection The configuration includes a level determination unit 102 that determines the infrared level detected by the panel, and a control unit 103 that controls the rotation axis in accordance with the infrared level.
Next, the operation and action of the first embodiment of the present invention will be described with reference to FIG.

  As a normal state, when the infrared ray irradiated by the infrared irradiation device 107 is received on the detection panel 106b, the screen 108 and the irradiation unit 100 are in the horizontal direction, and thus the irradiation direction is not corrected. If the level of the infrared ray irradiated by the infrared irradiation device 107 of the detection panel 106c becomes maximum in the level determination unit 102, the screen 108 and the irradiation unit 100 are not in a horizontal state, and thus the irradiation direction needs to be corrected. At this time, instead of calculating the conventional image correction on the projector side, the correction value when the infrared light reception of the detection panel 106c is maximized is stored in the control unit in advance, and this is called and the rotation axis is called. By controlling 104, the irradiation direction of the lens 105 can be easily changed.

  As described above, since the irradiation direction can be easily corrected, an irradiation angle correction system can be provided at low cost and in a small space.

  Note that the correction of the irradiation direction by the rotating shaft 104 may be processing correction of the video signal.

  Note that a plurality of detection panels may be arranged at an angle in the vertical and horizontal directions, such as an octahedron.

The infrared irradiation device 107 is built in the lid of the projector and is attached to the screen with a magnet or the like when used. Or you may incorporate in the stand etc. which fix a screen.
(Embodiment 2)
Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 3 is a configuration diagram of the projector according to the second embodiment of the present invention.

  A description of the same configuration as that of the first embodiment is omitted.

  The infrared irradiation device 107 that irradiates infrared rays attached to the screen is equipped with a light receiving element 109. When the infrared irradiation device 107 does not receive light such as image light from a projector, the infrared irradiation device 107 does not emit infrared rays. It is also possible to have

  As described above, since the irradiation direction can be easily corrected, it is possible to provide an irradiation angle correction system at low cost, with space saving and power saving.

  As described above, the irradiation angle correction system of the present invention can be used not only for a small projector but also for a video projection apparatus having any irradiation unit.

1 is a schematic configuration diagram of a system for correcting an irradiation angle according to a first embodiment of the present invention. Explanatory drawing of the system which correct | amends the irradiation angle in the 1st form of this invention The schematic block diagram of the system which correct | amends the irradiation angle in the 2nd form of this invention

Explanation of symbols

100 Irradiation part
101 Infrared detector
102 level determination unit 103 rotation axis control unit 104 rotation axis 105 lens 106 detection panel 106a detection panel a
106b Detection panel b
106c Detection panel c
107 Infrared irradiation device 108 Screen 109 Light receiving element 110 Infrared irradiation unit

Claims (2)

From a screen for projecting an image, a lens capable of projecting an image on the screen and an irradiation unit having a rotation axis for changing the irradiation direction, an infrared irradiation device for irradiating infrared light attached to the screen, and the infrared irradiation device An infrared detector that receives the irradiated infrared rays; a detection panel that is disposed inside the infrared detector and has an angle with respect to a horizontal plane; and a level determination unit that determines an infrared level detected by the detection panel; A projector having an irradiation angle correction system, comprising: a control unit that controls the rotation axis in accordance with an infrared level determined by the level determination unit. 2. The projector having an irradiation angle correction system according to claim 1, wherein the infrared irradiation device includes a light receiving element and irradiates infrared rays only when receiving light such as image light from the projector. .

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