JP5040492B2 - Projector and brightness adjustment method - Google Patents

Description

  The present invention relates to a projector and a brightness adjustment method.

Conventionally, a projector body including a light modulation device that modulates light emitted from a light source according to input image information to form an optical image, and a projection optical device that magnifies and projects the formed optical image, There is known a projector that includes an image output device that outputs image information to a projector main body, and the projector main body and the image output device are configured to be relatively rotatable (see, for example, Patent Document 1).
In the projector described in Patent Document 1, a projection unit (projector body) is connected via a connection unit provided above a DVD (Digital Versatile Disk) playback unit (image output device), and is projected onto the DVD playback unit. The part is configured to be relatively rotatable. Thereby, the projection direction of the light inject | emitted from a projection lens (projection optical apparatus) can be changed.

JP 2005-99617 A

  However, in the projector described in Patent Document 1, for example, when the projector main body and the image output device start to rotate unexpectedly, for example, when the projector user comes into contact with the projector main body, the projector lens emits the light from the projection lens. There is a problem that the light hits the user and the user may feel uncomfortable.

  An object of the present invention is to provide a projector and a brightness adjustment method that can be comfortably used by a user even when the projector main body and the image output apparatus are rotated.

A projector according to the present invention includes a light modulation device that modulates light emitted from a light source according to input image information to form an optical image, and a projection optical device that magnifies and projects the formed optical image. A projector comprising: a main body; an image output device that outputs the image information to the projector main body; and a connection mechanism that connects the projector main body and the image output device in a relatively rotatable manner, the projector main body and the image output A rotation position detection means for detecting a rotation position of the apparatus; and a control means for controlling the projector body, the control means based on the detection result of the rotation position detection means. a rotation speed calculation unit that calculates a rotation speed of the output device, the rotational speed calculated by the rotation speed calculation unit And determining adjustment determining unit whether a predetermined speed greater than or not, the Ri by the adjustment judging unit, when the rotational speed is determined to be greater than the predetermined speed, the brightness of light emitted from the projection optical device and wherein the obtaining Bei a brightness adjusting portion that adjusts to lower.

According to such a configuration, for example, the adjustment determination unit causes the rotation speed of the projector main body and the image output device calculated by the rotation speed calculation unit according to the change of the rotation position detected by the rotation position detection unit to be a predetermined speed. The brightness adjustment unit is configured to determine whether or not the brightness is larger than the brightness of the light emitted from the projection optical device when the calculated rotation speed is determined to be greater than the predetermined speed. By configuring so as to be adjusted to the above, even when the projector main body and the image output apparatus start rotating unexpectedly, the user can use them comfortably without feeling uncomfortable.
Note that the brightness adjusting unit adjusts the brightness of light emitted from the light source or adjusts the brightness of the optical image formed by the light modulation device, for example, to emit light emitted from the projection optical device. Can be adjusted.

Here, when the projector user intentionally rotates the projector main body and the image output device to change the projection direction of the light emitted from the projection optical device to a desired direction, the projector main body and the image output device unexpectedly. It is considered that the rotation speeds of the projector main body and the image output device are different from the case where the rotation starts. Specifically, the rotation speed is considered to be higher in the latter case than in the former case.
According to such a configuration, since the adjustment determination unit determines to adjust the luminance of the light emitted from the projection optical device when the rotation speed calculated by the rotation speed calculation unit is larger than the predetermined speed, the adjustment determination unit unexpectedly Even when the projector main body and the image output apparatus start to rotate, the user can use the apparatus comfortably without feeling uncomfortable. Further, when the projector user intentionally rotates the projector body and the image output device, the projector body and the image output device can be rotated without adjusting the luminance of the light emitted from the projection optical device.

In the present invention, it is preferable that the brightness adjusting unit maintains the adjustment even when the rotation speed becomes lower than the predetermined speed after adjusting the brightness of light emitted from the projection optical device.
According to such a configuration, for example, the projector main body and the image output device start to rotate unexpectedly by configuring the luminance adjustment unit to maintain the luminance of light emitted from the projection optical device in a low state. Then, after that, when the rotation is stopped, it is possible to reliably prevent the user from feeling uncomfortable because the light emitted from the projection optical device hits the user.

A projector according to the present invention includes a light modulation device that modulates light emitted from a light source according to input image information to form an optical image, and a projection optical device that magnifies and projects the formed optical image. A projector comprising: a main body; an image output device that outputs the image information to the projector main body; and a connection mechanism that connects the projector main body and the image output device in a relatively rotatable manner, the projector main body and the image output Rotation position detection means for detecting the rotation position of the apparatus and control means for controlling the projector body, wherein the control means recognizes a reference rotation position based on a detection result of the rotation position detection means. Based on the detection result of the reference rotational position recognition unit and the rotational position detection means, the reference rotational position recognition unit recognizes the reference rotational position recognition unit. A rotation angle calculation unit that calculates a rotation angle from a reference rotational position, and the rotation angle calculator determines adjustment determination unit rotation angle is calculated whether or not a predetermined angle greater than the unit, Ri by the adjustment judging unit , if the rotation angle is determined to be greater than the predetermined angle, and wherein the obtaining Bei a luminance adjustment unit for adjustment for reducing the brightness of light emitted from the projection optical device.

The reference rotation position recognition unit detects, for example, the rotation position of the projector main body and the image output device when the power button of the projector is pressed and light is emitted from the projection optical device. The rotation position can be configured to be recognized as the reference rotation position.
Then, the rotation angle calculation unit detects, for example, the rotation position of the projector main body and the image output device every predetermined time by the rotation position detection means, and calculates the difference value between this rotation position and the reference rotation position as the rotation angle. Can be configured to.

Here, when the projector user intentionally rotates the projector main body and the image output device to change the projection direction of the light emitted from the projection optical device to a desired direction, the projector main body and the image output device unexpectedly. The rotation angle of the projector main body and the image output device is considered to be different from the case where the rotation starts. Specifically, the rotation angle is considered to be larger in the latter case than in the former case.
According to such a configuration, since the adjustment determination unit determines to adjust the luminance of the light emitted from the projection optical device when the rotation angle calculated by the rotation angle calculation unit is larger than the predetermined angle, the adjustment determination unit unexpectedly Even when the projector main body and the image output apparatus start to rotate, the user can use the apparatus comfortably without feeling uncomfortable. Further, when the projector user intentionally rotates the projector body and the image output device, the projector body and the image output device can be rotated without adjusting the luminance of the light emitted from the projection optical device.

In the present invention, the control means, after the rotational speed calculated is greater than a predetermined speed by a pre-Symbol rotation speed calculation unit, when the rotational speed is smaller than the predetermined speed, for the image quality adjustment It is preferable to include an adjustment image output unit that outputs predetermined image information to the light modulation device.

  Here, when the projector user rotates the projector body and the image output device to change the projection direction of the light emitted from the projection optical device, the distance between the projection optical device and a projection surface such as a screen changes. It becomes. For this reason, for example, in a state where an OSD (On Screen Display) screen or an image based on image information stored on a DVD or the like is displayed on the projection surface, the projector user can perform focus adjustment, zoom adjustment, etc. There is a problem that it takes time to adjust the image quality.

  However, according to such a configuration, for example, when the rotation of the projector is stopped after the projector user rotates the projector body and the image output device to change the projection direction of the light emitted from the projection optical device, The adjustment image output unit outputs predetermined image information for image quality adjustment to the light modulation device. Therefore, for example, by outputting predetermined image information for image quality adjustment such as focus adjustment and zoom adjustment in the adjustment image output unit to the light modulation device, the projector user can It is possible to easily perform image quality adjustment such as focus adjustment and zoom adjustment while referring to a display image displayed on the projection surface.

In this invention, it is preferable that the said brightness | luminance adjustment part adjusts the brightness | luminance of the light inject | emitted from the said projection optical apparatus by controlling the said light modulation apparatus.
According to such a configuration, the brightness adjustment unit adjusts to increase or decrease the brightness of the light emitted from the projection optical device, as compared with the case of adjusting the brightness of the light emitted from the light source. It can be implemented quickly.

In the present invention, a shielding member capable of shielding the light emitted from the projection optical device is provided, and the brightness adjusting unit adjusts the brightness of the light emitted from the projection optical device by controlling the shielding member. It is preferable to do.
According to such a configuration, the luminance adjusting unit adjusts the luminance of light emitted from the light source, adjusts the luminance of light emitted from the projection optical device by controlling the light modulation device, etc. As compared with, adjustment for increasing or decreasing the luminance of light emitted from the projection optical apparatus can be performed more quickly.

The brightness adjustment method of the present invention includes a light modulation device that modulates light emitted from a light source according to input image information to form an optical image, and a projection optical device that magnifies and projects the formed optical image. A brightness adjustment method used for a projector, comprising: a projector main body, an image output device that outputs the image information to the projector main body, and a connection mechanism that connects the projector main body and the image output device so as to be relatively rotatable. , based on the detection result the rotational position detecting means for detecting a rotational position of the projector body and the image output device, a rotation speed calculation step of calculating the rotational speed of the projector body and the image output device, said rotating rotational speed adjustment determination step of determining whether or not larger than a predetermined speed calculated by the speed calculating step Similar the adjustment determination step, when the rotational speed is determined to be greater than the predetermined speed, and comprising a luminance adjusting step of adjustment for reducing the brightness of light emitted from the projection optical device To do.
In addition, the brightness adjustment method of the present invention includes a light modulation device that modulates light emitted from a light source according to input image information to form an optical image, and a projection optical device that magnifies and projects the formed optical image. A brightness adjustment method used for a projector comprising: a projector main body including: an image output device that outputs the image information to the projector main body; and a connection mechanism that connects the projector main body and the image output device in a relatively rotatable manner. A reference rotation position recognition step for recognizing a reference rotation position based on a detection result of a rotation position detection means for detecting a rotation position of the projector main body and the image output device; and a detection of the rotation position detection means. A rotation angle for calculating a rotation angle from the reference rotation position recognized by the reference rotation position recognition step based on the result A step out, the rotation angle adjustment determination step of determining whether a predetermined angle greater than that calculated by the rotation angle calculation step, similar the adjustment determination step, and the rotation angle is greater than the predetermined angle determination Once, characterized in that it comprises a luminance adjusting step of adjustment for reducing the brightness of light emitted from the projection optical device.
According to such a configuration, the same operational effects as those of the projector described above can be obtained.

[First Embodiment]
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[Schematic configuration of projector]
FIG. 1 is a perspective view of the projector 1 viewed from the front side, and FIG. 2 is a perspective view of the projector 1 viewed from the rear side. FIG. 3 is an exploded perspective view of the projector 1 as viewed from the front side. In FIG. 1 to FIG. 3, for convenience of explanation, the direction from the rear side to the front side of the projector 1 is the X axis, and two axes orthogonal to the X axis are the Y axis (horizontal axis) and the Z axis (vertical), respectively. Axis). The same applies to the following drawings.
As shown in FIGS. 1 to 3, the projector 1 modulates the light emitted from the light source according to input image information to form an optical image, and enlarges and projects the formed optical image. A DVD player 3 that outputs image information to the projector main body 2, a connection mechanism 4 that rotatably connects the projector main body 2 and the DVD player 3, and a rotation for detecting the rotational positions of the projector main body 2 and the DVD player 3. Position detecting means 6 (see FIGS. 4 and 5). The internal configuration of the rotational position detecting means 6 and the projector 1 will be described in detail later.

  As shown in FIGS. 1 and 2, the projector main body 2 is placed on the upper side (+ Z-axis direction side) of the DVD player 3 and is formed in a substantially rectangular parallelepiped shape. The projection lens 22 exposed on the front surface (surface on the + X-axis direction side) of 21 and an operation panel provided on the rear side (−X-axis direction side) of the upper surface (surface on the + Z-axis direction side) of the upper housing 21 23. The operation panel 23 is for performing operations such as starting up and adjusting the projector 1.

  A DVD player 3 as an image output device reproduces image information recorded on the recording medium via an image cable (not shown) by reproducing a recording medium such as a DVD on which image information is recorded as digital data. Output to the projector body 2. As shown in FIGS. 1 and 2, the DVD player 3 is disposed on the lower side (−Z-axis direction side) of the projector main body 2 and has a lower casing 31 formed in a substantially rectangular parallelepiped shape, and a lower casing. A DVD insertion / extraction port 32 provided at a substantially central portion of the front surface of the body 31, a DVD operation unit 33 provided below the DVD insertion / extraction port 32, and a rear surface (surface on the −X axis direction side) of the lower housing 31. ) Provided with an interface cover 34 and an inlet connector 35.

The DVD insertion / extraction port 32 is a portion into which a recording medium such as a DVD is inserted / extracted, and the DVD player 3 reproduces image information and the like recorded on the recording medium inserted into the DVD insertion / extraction port 32.
The DVD operation unit 33 is a part for performing operations such as playback / stop of the DVD player 3. The DVD player 3 is inserted into the DVD insertion / extraction port 32 by operating the DVD operation unit 33. Reproduction / stop of the image information recorded on the recording medium is performed.

Although not shown in the figure, the interface cover 34 is provided with various interface connectors such as an image input terminal for inputting image information from the outside to the projector 1. Protect the connector. By opening the interface cover 34, various interface connectors can be used.
The inlet connector 35 is a connector for connecting an AC power cable from the outside, and is exposed without being covered by the interface cover 34.
That is, the various interface connectors and the inlet connector 35 are provided on the lower DVD player 3.

As shown in FIG. 3, the coupling mechanism 4 is fixed to the bottom plate 24 of the projector main body 2, and is fixed to the plate-like member 41 and is rotatable to the top plate 36 of the DVD player 3. A rotating member 42 to be attached and a plurality of divided annular members 43 for attaching the rotating member 42 to the top plate 36 are provided.
In FIG. 3, the illustration of the projection lens 22 (see FIG. 1) exposed from the upper housing 21 and the DVD insertion / extraction port 32 (see FIG. 1) provided in the lower housing 31 is omitted. is doing.

The plate-like member 41 is a plate-like member formed in a substantially cross shape in plan view, and has four end portions that extend in four directions substantially orthogonally. A rotating member 42 is fixed to a substantially central position of the plate-like member 41 with a plurality of screws.
The rotating member 42 includes a substantially cylindrical rotating member main body 421 and an extending portion 422 provided at one end on the top plate 36 side of the rotating member main body 421 so as to extend outward substantially orthogonal to the axial direction. .
Here, the top plate 36 is formed with a substantially disk-shaped pedestal 361 projecting upward by press molding or the like at a substantially central position, and a substantially circular opening 361A is formed at a substantially central position of the pedestal 361. Is formed. The rotating member 42 is inserted into the opening 361A from above while being fixed to the plate-like member 41.

The divided annular member 43 is a member obtained by dividing a flat annular member having an inner diameter substantially the same as the outer diameter of the rotating member main body 421 into two parts, and the ceiling member in a state where the rotating member 42 is inserted into the opening 361A. The plate 36 and the extending portion 422 are formed to have substantially the same thickness.
The split annular member 43 is inserted so as to sandwich the rotating member main body 421 in the gap between the top plate 36 and the extending portion 422, and is fixed to the top plate 36 with a plurality of screws. The top plate 36 is fixed to the lower housing 31 with a plurality of screws.

[Configuration of Rotation Position Detection Means]
FIG. 4 is a view of the top plate 36 as viewed from below. FIG. 5 is a perspective view of the top plate 36 as viewed obliquely from below.
As shown in FIG. 4, the rotational position detection means 6 is a rotary in a substantially rectangular shape in plan view that is attached to a substantially central position of a split ring member 43 fixed to the rear side (−X axis direction side) of the top plate 36. An encoder 61 and an encoder substrate 62 that is attached to a base 361 and detects a signal output from the rotary encoder 61 are provided.

The rotary encoder 61 is an absolute rotary encoder, and includes a rotating body 61A that protrudes toward the rotating member 42 and is rotatably provided. The rotary encoder 61 outputs a signal based on the rotational position of the rotating body 61A. In addition, a tooth row (not shown) is formed on the peripheral surface of the rotating body 61A.
Here, as shown in FIG. 5, a tooth row is formed on the peripheral surface of the extending portion 422 of the rotating member 42, and this tooth row meshes with the tooth row of the rotating body 61A. When the rotating member 42 rotates, the rotating body 61A rotates accordingly. That is, the rotary encoder 61 outputs a signal based on the rotation position of the rotation member 42 and, consequently, the rotation positions of the projector body 2 and the DVD player 3.
The encoder board 62 is a circuit board for detecting the rotational position of the rotary encoder 61 and is controlled by the control means 26 described later. Then, the encoder board 62 outputs the detected signal output of the rotary encoder 61 to the control means 26.

[Internal configuration of projector]
FIG. 6 is a block diagram showing the internal configuration of the projector 1.
As shown in FIG. 6, the projector main body 2 is roughly composed of an image projection unit 25 and a control unit 26.
The image projection unit 25 modulates light emitted from the light source according to image information to form an optical image, and enlarges and projects the formed optical image on a projection surface such as a screen Sc. The image projection unit 25 includes a light source device 251, a liquid crystal panel 252, and the projection lens 22 described above.

The light source device 251 includes a light source lamp 253 configured by a high-pressure discharge lamp, and the light source lamp 253 emits light toward the liquid crystal panel 252. The light source device 251 may include various self-light emitting elements such as a light emitting diode, a laser diode, and an organic EL element instead of the light source lamp 253.
A liquid crystal panel 252 as a light modulation device is a transmissive liquid crystal panel, and changes the arrangement of liquid crystal molecules sealed in a liquid crystal cell (not shown) based on image information, and emits light emitted from a light source lamp 253. The optical image is modulated according to image data by being transmitted or blocked, and an optical image is formed. The optical image is emitted to the projection lens 22.

The projection lens 22 as a projection optical device is configured as a combined lens in which a plurality of lenses are housed in a cylindrical barrel (not shown), and an optical image emitted from the liquid crystal panel 252 is enlarged toward the screen Sc. Projected. A projected image based on the emitted optical image is displayed on the screen Sc.
Although not shown, the projector main body 2 includes a color light separation optical device that separates light emitted from the light source lamp 253 into three colors of RGB (Red Green Blue). The liquid crystal panel 252 described above is provided corresponding to the three colors RGB separated by the color light separation optical device. Further, the projector main body 2 includes a combining optical device that combines the optical images of the three colors to generate an optical image representing a color image.

The control means 26 includes, for example, a CPU (Central Processing Unit) and controls the projector body 2 and the encoder board 62. The control unit 26 includes a rotation speed calculation unit 261, an adjustment determination unit 262, and a luminance adjustment unit 263.
The rotational speed calculation unit 261 calculates the rotational speeds of the projector main body 2 and the DVD player 3 based on the signal output of the rotary encoder 61 output from the encoder substrate 62, that is, the detection result of the rotational position detection means 6.
The adjustment determination unit 262 determines to adjust the luminance of the light emitted from the projection lens 22 when the rotation speed calculated by the rotation speed calculation unit 261 is greater than a predetermined speed.
The luminance adjustment unit 263 adjusts the luminance of light emitted from the projection lens 22 based on the determination result by the adjustment determination unit 262.

[Projector brightness adjustment processing]
FIG. 7 is a flowchart showing the brightness adjustment processing of the projector 1.
When a power button (not shown) is pressed, the projector 1 enlarges and projects an optical image formed according to the image information toward the screen Sc, and executes the following luminance adjustment processing.
First, the rotational speed calculation unit 261 obtains the rotational positions of the projector body 2 and the DVD player 3 by sampling the signal output of the rotary encoder 61 output from the encoder substrate 62 at predetermined time intervals (step S1: Rotation position acquisition step).

When the rotation positions of the projector body 2 and the DVD player 3 are acquired in the rotation position acquisition step S1, the rotation speed calculation unit 261 calculates the rotation speeds of the projector body 2 and the DVD player 3 based on the rotation positions. (Step S2: Rotational speed calculation step).
Specifically, the rotation speed calculation unit 261 calculates the rotation speeds of the projector main body 2 and the DVD player 3 by time-differentiating the rotation positions for each predetermined time acquired in the rotation position acquisition step S1.

When the rotation speeds of the projector body 2 and the DVD player 3 are calculated in the rotation speed calculation step S2, the adjustment determination unit 262 determines whether or not the rotation speed is greater than a predetermined speed (adjustment determination step S3). The predetermined speed is stored in a memory (not shown) of the control means 26.
If it is determined in the adjustment determination step S3 that the rotation speed is greater than the predetermined speed, the luminance adjustment unit 263 controls the liquid crystal panel 252 so as to decrease the luminance of the light emitted from the projection lens 22. Adjustment is started (step S4: luminance adjustment step).

  Specifically, the luminance adjustment unit 263 causes the liquid crystal panel 252 to block the light emitted from the light source lamp 253 in all the liquid crystal cells when it is determined in the adjustment determination step S3 that the rotation speed is greater than the predetermined speed. Image information, that is, image information such that the display image displayed on the screen Sc becomes an all-black image is adjusted so that the luminance of light emitted from the projection lens 22 is lowered. On the other hand, if it is determined in the adjustment determination step S3 that the rotation speed is lower than the predetermined speed, the luminance adjustment unit 263 performs steps S1 to S3 again without adjusting the luminance of the light emitted from the projection lens 22. Execute.

When the luminance is adjusted in the luminance adjustment step S4, the luminance adjustment unit 263 maintains the luminance adjustment state until the power button is pressed again (luminance adjustment maintaining step S5). Therefore, the display image displayed on the screen Sc is maintained as an all black image. That is, after adjusting the brightness of the light emitted from the projection lens 22, the brightness adjusting unit 263 maintains the adjustment until the power button is pressed again even when the rotation speed becomes lower than the predetermined speed.
When the power button is pressed again, the luminance adjustment unit 263 stops adjusting the luminance of light emitted from the projection lens 22 (step S6: luminance adjustment stop step). Thereby, the projector 1 enlarges and projects the optical image formed according to the image information toward the screen Sc.
By executing the above steps S1 to S6, the brightness adjustment processing of the projector 1 is executed.

The projector 1 according to the present embodiment has the following effects.
(1) Since the control unit 26 includes the adjustment determination unit 262 and the luminance adjustment unit 263, the user does not feel uncomfortable even when the projector body 2 and the DVD player 3 start to rotate unexpectedly. Can be used comfortably.
(2) Since the adjustment determination unit 262 determines to adjust the luminance of the light emitted from the projection lens 22 when the rotation speed calculated by the rotation speed calculation unit 261 is greater than a predetermined speed, the user of the projector 1 When the projector body 2 and the DVD player 3 are rotated intentionally, the brightness of the light emitted from the projection lens 22 can be rotated without being adjusted.

(3) Since the brightness adjustment unit 263 adjusts the brightness of the light emitted from the projection lens 22 and maintains the adjustment until the power button is pressed again even when the rotation speed becomes lower than the predetermined speed, It can be reliably prevented that the light emitted from the projection lens 22 hits the user and the user feels uncomfortable.
(4) Since the luminance adjustment unit 263 adjusts the luminance of the light emitted from the projection lens 22 by controlling the liquid crystal panel 252, compared with the case where the luminance of the light emitted from the light source is adjusted, Adjustment to increase or decrease the luminance of light emitted from the projection lens 22 can be performed quickly.

[Second Embodiment]
The projector 1A according to the second embodiment of the present invention will be described below.
In the following description, parts that have already been described are assigned the same reference numerals and description thereof is omitted.
In the projector 1 according to the first embodiment, the adjustment determination unit 262 determines to adjust the luminance of the light emitted from the projection lens 22 when the rotation speed calculated by the rotation speed calculation unit 261 is greater than a predetermined speed. Was. In contrast, the projector 1A according to the present embodiment includes a rotation angle calculation unit 265 that calculates a rotation angle from the reference rotation position, and the adjustment determination unit 262A has a rotation angle calculated by the rotation angle calculation unit 265. The difference is that it is determined that the brightness of light emitted from the projection lens 22 is adjusted when the angle is larger than the predetermined angle.

FIG. 8 is a block diagram showing the internal configuration of the projector 1A.
As shown in FIG. 8, the control unit 26 </ b> A includes a reference rotation position recognition unit 264 and a rotation angle calculation unit 265.
The reference rotation position recognition unit 264 recognizes the reference rotation position based on the detection result of the rotation position detection unit 6.
The rotation angle calculation unit 265 calculates a rotation angle from the reference rotation position recognized by the reference rotation position recognition unit 264 based on the detection result of the rotation position detection unit 6.
The adjustment determination unit 262A determines to adjust the luminance of light emitted from the projection lens 22 when the rotation angle calculated by the rotation angle calculation unit 265 is larger than a predetermined angle.

FIG. 9 is a flowchart showing the brightness adjustment processing of the projector 1A.
When the power button is pressed, the projector 1A enlarges and projects the optical image formed according to the image information toward the screen Sc, and executes the following brightness adjustment processing.
First, the reference rotational position recognition unit 264 recognizes the reference rotational position based on the detection result of the rotational position detection means 6 (step S10: reference rotational position recognition step).
Specifically, the reference rotational position recognizing unit 264 samples the signal output of the rotary encoder 61 output from the encoder board 62 for the rotational positions of the projector main body 2A and the DVD player 3 when the power button is pressed. And the acquired rotational position is recognized as a reference rotational position.

When the reference rotation position is recognized in the reference rotation position recognition step S10, the rotation angle calculation unit 265 executes the rotation position acquisition step S11 as in the first embodiment.
When the rotation position is acquired in the rotation position acquisition step S11, the rotation angle calculation unit 265 calculates a rotation angle from the reference rotation position based on the rotation position (rotation angle calculation step S12). The rotation angle is calculated by subtracting the rotation position acquired in the rotation position acquisition step S1 from the reference rotation position and taking the absolute value.

When the rotation angle from the reference rotation position is calculated in the rotation angle calculation step S12, the adjustment determination unit 262A determines whether or not this rotation angle is larger than a predetermined angle (adjustment determination step S13). This predetermined angle is stored in a memory (not shown) of the control means 26A.
When it is determined in the adjustment determination step S13 that the rotation angle is larger than the predetermined angle, the luminance adjustment unit 263 starts adjustment so as to reduce the luminance of the light emitted from the projection lens 22 (step S14: Brightness adjustment step). On the other hand, if it is determined in the adjustment determination step S13 that the rotation angle is smaller than the predetermined angle, the luminance adjustment unit 263 performs steps S1 to S13 again without adjusting the luminance of the light emitted from the projection lens 22. Execute.
When the luminance is adjusted in the luminance adjustment step S14, the projector 1A executes the luminance adjustment maintaining step S5 to the luminance adjustment stopping step S6 as in the first embodiment.
By executing the above steps S10 to S6, the brightness adjustment processing of the projector 1A is executed.

Also in this embodiment, in addition to the same effects as (1), (3), (4) in the first embodiment, the following effects can also be achieved.
That is, the adjustment determination unit 262A determines that the brightness of the light emitted from the projection lens 22 is adjusted when the rotation angle calculated by the rotation angle calculation unit 265 is larger than a predetermined angle. When the projector body 2 and the DVD player 3 are intentionally rotated, the projector body 2 and the DVD player 3 can be rotated without adjusting the luminance of the light emitted from the projection lens 22.

[Third Embodiment]
Hereinafter, a projector 1B according to a third embodiment of the invention will be described.
The projector 1B according to the present embodiment is different from the projector 1 according to the first embodiment in that an adjustment image output unit 266 that outputs predetermined image information for adjusting image quality to the liquid crystal panel 252 is provided.

FIG. 10 is a block diagram showing the internal configuration of the projector 1B.
As shown in FIG. 10, the control unit 26B includes an adjustment image output unit 266.
The image output unit 266 for adjustment uses the image quality such as focus adjustment and zoom adjustment when the rotation speed calculated by the rotation speed calculation unit 261 becomes higher than the predetermined speed and then becomes lower than the predetermined speed. Predetermined image information for adjustment is output to the liquid crystal panel 252.

FIG. 11 is a flowchart showing adjustment image output processing of the projector 1B.
When the power button is pressed, the projector 1B enlarges and projects the optical image formed according to the image information toward the screen Sc, and executes the following adjustment image output processing.
First, the projector 1B executes Steps S1 and S2 as in the first embodiment.
When the rotation speeds of the projector main body 2B and the DVD player 3 are calculated in the rotation speed calculation step S2, the adjustment image output unit 266 determines whether or not the rotation speed is greater than a predetermined speed (rotation speed determination step). S20). The predetermined speed is stored in a memory (not shown) of the control means 26B. In addition, the predetermined speed in the adjustment image output unit 266 is different from the predetermined speed in the adjustment determination unit 262. In this embodiment, the predetermined speed in the adjustment image output unit 266 is the same as the predetermined speed in the adjustment determination unit 262. Small compared.

If it is determined in the rotation speed determination step S20 that the rotation speed is greater than the predetermined speed, the projector 1B executes the rotation position acquisition step S21 to the rotation speed calculation step S22 as in the first embodiment. On the other hand, when it is determined in the rotation speed determination step S20 that the rotation speed is lower than the predetermined speed, the projector 1B executes steps S1 to S20 again.
When the rotation speeds of the projector main body 2B and the DVD player 3 are calculated in the rotation speed calculation step S22, the adjustment image output unit 266 determines whether or not the rotation speed is smaller than a predetermined speed (rotation speed determination step). S23).

  When it is determined in the rotation speed determination step S23 that the rotation speed is lower than the predetermined speed, the adjustment image output unit 266 displays predetermined image information for adjusting image quality such as focus adjustment and zoom adjustment on the liquid crystal. Output to the panel 252 (step S24: adjustment image output step). As a result, an image is displayed on the screen Sc for image quality adjustment such as focus adjustment and zoom adjustment. On the other hand, when it is determined that the rotation speed is higher than the predetermined speed in the rotation speed determination step S23, the projector 1B executes steps S21 to S22 again.

  In this embodiment, a priority order is set between the processing by the adjustment determination unit 262 and the luminance adjustment unit 263 and the processing by the adjustment image output unit 266, and the processing by the adjustment determination unit 262 and the luminance adjustment unit 263. Is higher than the priority of processing by the adjustment image output unit 266. That is, when the rotation speed calculated by the rotation speed calculation unit 261 is larger than the predetermined speed in the adjustment determination unit 262, the rotation position acquisition step S21 to the adjustment image output step S24 by the adjustment image output unit 266 are executed. Instead, the luminance adjustment step S4 to the luminance adjustment stop step S6 by the luminance adjustment unit 263 are preferentially executed.

Also in this embodiment, in addition to the same operational effects as (1), (2), (4) in the first embodiment, the following operational effects can also be achieved.
That is, since an image is displayed on the screen Sc for image quality adjustment such as focus adjustment and zoom adjustment, the user of the projector 1B can easily refer to the display image displayed on the screen Sc. Image quality adjustment such as focus adjustment and zoom adjustment can be performed.

[Fourth Embodiment]
Hereinafter, a projector 1C according to a fourth embodiment of the invention will be described.
In the projector 1 according to the first embodiment, the brightness adjusting unit 263 outputs image information for blocking the light emitted from the light source lamp 253 in all liquid crystal cells to the liquid crystal panel 252 and outputs from the projection lens 22. The brightness of the emitted light is adjusted to be low. On the other hand, the projector 1 </ b> C according to the present embodiment includes a lens shutter 27 that blocks light emitted from the projection lens 22, and the luminance adjustment unit 263 </ b> C emits from the projection lens 22 by controlling the lens shutter 27. The difference is that the brightness of the light is adjusted.

FIG. 12 is a block diagram showing the internal configuration of the projector 1C.
As shown in FIG. 12, the projector main body 2 </ b> C includes a control unit 26 </ b> C and a lens shutter 27.
Although not shown, the lens shutter 27 serving as a shielding member is a non-translucent plate-like member provided on the rear side in the projection direction of the projection lens 22 and slides along the front surface of the upper housing 21. By doing so, the light emitted from the projection lens 22 can be blocked. In addition, a linear actuator (not shown) is connected to the lens shutter 27 so that the lens shutter 27 can be controlled to open and close based on a control signal output from the control means 26C.
The control unit 26C includes a luminance adjustment unit 263C. The luminance adjustment unit 263C controls the lens shutter 27 according to the rotation speed calculated by the rotation speed calculation unit 261, and then opens and closes the projection lens 22. Adjust the brightness of the light.

In this embodiment as well, the same operational effects as (1) to (3) in the first embodiment can be achieved, and the following operational effects can also be achieved.
That is, the brightness adjusting unit 263C adjusts the brightness of the light emitted from the projection lens 22 by controlling the lens shutter 27 to open and close, so that the brightness of the light emitted from the light source is adjusted, or the liquid crystal Compared with the case where the brightness of the light emitted from the projection lens 22 is adjusted by controlling the panel 252, the adjustment for increasing or decreasing the brightness of the light emitted from the projection lens 22 is performed more quickly. can do.

[Modification of Embodiment]
Note that the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope in which the object of the present invention can be achieved are included in the present invention. Moreover, it is free to combine the embodiments.
In each of the embodiments described above, the rotational position detecting means 6 is constituted by the rotary encoder 61 and the encoder substrate 62. However, for example, a variable resistor or the like may be used. Any device for detecting the rotational position may be used.
In each of the embodiments described above, the luminance adjustment unit adjusts the luminance of the light emitted from the projection lens 22 by controlling the liquid crystal panel 252 or the lens shutter 27. For example, the luminance adjustment unit attenuates the light emitted from the light source. Or the power may be turned off. In short, it is only necessary to adjust the luminance of light emitted from the projection optical apparatus.

In each of the embodiments, the adjustment determination unit determines to adjust the brightness of light emitted from the projection optical device when the rotation speed or rotation angle of the projector main body and the image output device is larger than the predetermined speed or predetermined angle. It was. At this time, the predetermined speed or the predetermined angle may be zero .

  In the first to third embodiments, when the brightness adjusting unit determines that the rotation speed or the rotation angle is greater than the predetermined speed or the predetermined angle, the brightness adjusting unit causes the liquid crystal panel 252 to receive light from the light source lamp 253 in all the liquid crystal cells. The image information for blocking the emitted light is output to adjust the brightness of the light emitted from the projection lens 22 to be low. On the other hand, for example, the brightness adjusting unit changes the light transmittance of the light modulation device so as to gradually decrease according to the rotation speed or the rotation angle, and thereby the light emitted from the projection optical device. The brightness may be adjusted to be low.

In the second embodiment, the reference rotation position recognition unit 264 recognizes the rotation positions of the projector main body 2A and the DVD player 3 when the power button is pressed as the reference rotation position. On the other hand, for example, the reference rotation position may be recognized by an operation input from the user. In short, it is only necessary that the reference rotation position recognition unit can recognize the reference rotation position based on the detection result of the rotation position detection means.
In the second embodiment, the reference rotational position is recognized based on the detection result of the rotational position detection means 6. On the other hand, for example, a switch for recognizing the reference rotation position may be provided, and the reference rotation position may be stored in advance in a memory or the like. In short, it is sufficient that the reference rotation position recognition unit can recognize the reference rotation position for calculating the rotation angle.
In the third embodiment, the adjustment image output unit 266 outputs predetermined image information for adjusting image quality such as focus adjustment and zoom adjustment to the liquid crystal panel 252. Other image information that is sometimes useful may be output to the light modulation device.

In each of the above embodiments, the transmissive liquid crystal panel 252 is employed. However, the present invention is not limited to this, and a reflective liquid crystal panel may be employed, or a digital micromirror device (DMD) may be employed. Good. DMD is a trademark of Texas Instruments Incorporated.
In each of the above embodiments, the DVD player 3 is exemplified as the image output device. However, for example, a video player may be used as long as it outputs image information to the projector main body.

  The present invention can be used for a projector, and in particular, can be suitably used for a projector including a projector main body and an image output device.

The perspective view which looked at the projector in a 1st embodiment from the front side. The perspective view which looked at the projector in the said embodiment from the back side. The disassembled perspective view which looked at the projector in the said embodiment from the front side. The figure which looked at the top plate in the embodiment from the lower side. The perspective view which looked at the top plate in the said embodiment from the diagonally lower side. The block diagram which shows the internal structure of the projector in the said embodiment. 7 is a flowchart showing brightness adjustment processing of the projector in the embodiment. The block diagram which shows the internal structure of the projector in 2nd Embodiment. 7 is a flowchart showing brightness adjustment processing of the projector in the embodiment. The block diagram which shows the internal structure of the projector in 3rd Embodiment. 6 is a flowchart showing adjustment image output processing of the projector in the embodiment. The block diagram which shows the internal structure of the projector in 4th Embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1,1A, 1B, 1C ... Projector, 2, 2A, 2B, 2C ... Projector body, 3 ... DVD player (image output device), 4 ... Connection mechanism, 6 ... Rotation position detection means, 22 ... Projection lens (projection optics) Device), 26, 26A, 26B, 26C ... control means, 27 ... lens shutter (shielding member), 252 ... liquid crystal panel (light modulation device), 261 ... rotational speed calculator, 262,262A ... adjustment determination unit, 263 263C ... brightness adjustment unit, 264 ... reference rotation position recognition unit, 265 ... rotation angle calculation unit, 266 ... adjustment image output unit, S3, S13 ... adjustment determination step, S4, S14 ... luminance adjustment step.

Claims (8)

A projector main body including a light modulation device that modulates light emitted from a light source according to input image information to form an optical image, a projection optical device that magnifies and projects the formed optical image, and the projector main body A projector comprising: an image output device that outputs the image information; and a connection mechanism that connects the projector body and the image output device so as to be relatively rotatable,
Rotational position detecting means for detecting rotational positions of the projector body and the image output device;
Control means for controlling the projector body,
The control means includes
A rotation speed calculation unit that calculates rotation speeds of the projector main body and the image output device based on a detection result of the rotation position detection unit;
An adjustment determination unit that determines whether or not the rotation speed calculated by the rotation speed calculation unit is greater than a predetermined speed ;
Wherein Ri by the adjustment judging unit, when the rotational speed is determined to be greater than the predetermined speed, that obtain Bei a luminance adjustment unit for adjustment for reducing the brightness of light emitted from the projection optical device Characteristic projector. The projector according to claim 1, wherein
The brightness adjusting unit is
After adjusting the brightness of the light emitted from the projection optical device, the projector maintains the adjustment even when the rotational speed becomes lower than the predetermined speed. A projector main body including a light modulation device that modulates light emitted from a light source according to input image information to form an optical image, a projection optical device that magnifies and projects the formed optical image, and the projector main body A projector comprising: an image output device that outputs the image information; and a connection mechanism that connects the projector body and the image output device so as to be relatively rotatable,
Rotational position detecting means for detecting rotational positions of the projector body and the image output device;
Control means for controlling the projector body,
The control means includes
A reference rotational position recognition unit for recognizing a reference rotational position based on a detection result of the rotational position detection means;
A rotation angle calculation unit that calculates a rotation angle from a reference rotation position recognized by the reference rotation position recognition unit based on a detection result of the rotation position detection unit;
An adjustment determination unit that determines whether the rotation angle calculated by the rotation angle calculation unit is larger than a predetermined angle ;
Ri by the adjustment judging unit, when the rotation angle is determined to be greater than the predetermined angle, that obtain Bei a luminance adjustment unit for adjustment for reducing the brightness of light emitted from the projection optical device Characteristic projector. The projector according to claim 1, wherein
The control means includes
After the rotation speed calculated by the rotation speed calculation unit becomes higher than a predetermined speed, when the rotation speed becomes lower than the predetermined speed, predetermined image information for image quality adjustment is sent to the light modulation device. A projector comprising: an adjustment image output unit that outputs the adjustment image. The projector according to any one of claims 1 to 4,
The brightness adjusting unit adjusts the brightness of light emitted from the projection optical device by controlling the light modulation device. The projector according to any one of claims 1 to 5,
A shielding member capable of shielding light emitted from the projection optical device;
The brightness adjusting unit adjusts the brightness of light emitted from the projection optical device by controlling the shielding member. A projector main body including a light modulation device that modulates light emitted from a light source according to input image information to form an optical image, a projection optical device that magnifies and projects the formed optical image, and the projector main body A brightness adjustment method used for a projector, comprising: an image output device that outputs the image information; and a connection mechanism that connects the projector body and the image output device so as to be relatively rotatable,
A rotational speed calculating step of calculating rotational speeds of the projector main body and the image output device based on a detection result of a rotational position detecting means for detecting a rotational position of the projector main body and the image output device;
An adjustment determination step for determining whether or not the rotation speed calculated in the rotation speed calculation step is greater than a predetermined speed ;
Similar the adjustment determination step, when the rotational speed is determined to be greater than the predetermined speed, and comprising a luminance adjusting step of adjustment for reducing the brightness of light emitted from the projection optical device Brightness adjustment method. A projector main body including a light modulation device that modulates light emitted from a light source according to input image information to form an optical image, a projection optical device that magnifies and projects the formed optical image, and the projector main body A brightness adjustment method used for a projector, comprising: an image output device that outputs the image information; and a connection mechanism that connects the projector body and the image output device so as to be relatively rotatable,
A reference rotational position recognition step for recognizing a reference rotational position based on a detection result of a rotational position detecting means for detecting a rotational position of the projector main body and the image output device;
A rotation angle calculating step for calculating a rotation angle from a reference rotation position recognized by the reference rotation position recognition step based on a detection result of the rotation position detection means;
An adjustment determination step of determining whether or not the rotation angle calculated in the rotation angle calculation step is larger than a predetermined angle ;
Similar the adjustment determination step, when the rotation angle is determined to be greater than the predetermined angle, and comprising a luminance adjusting step of adjustment for reducing the brightness of light emitted from the projection optical device Brightness adjustment method.

Images