JP5018129B2 - Projector and projection system - Google Patents

Description

  The present invention relates to a projector and a projection system including the projector.

Conventionally, there is known a projector that forms an optical image according to input image information and projects the formed optical image onto a screen.
Such a projector has legs that tilt the projection direction of the optical image by projecting and retracting from the projector housing in order to adjust the projection area of the optical image projected on the screen (for example, Patent Document 1).
In the projector described in Patent Document 1, leg portions having screw shafts are provided at two locations on the bottom surface of the housing on the front side in the projection direction of the optical image. Each leg is rotated about the screw shaft so that the leg protrudes from the casing and the projection direction of the optical image is inclined.

JP 2005-43597 A

  However, in the projector described in Patent Document 1, since there is no scale or mark on each leg, the user of the projector cannot easily determine the amount of projection of each leg from the housing. There has been a problem that the projection direction of the image must be adjusted sensuously. Therefore, there are problems that it is difficult to install the projector in the same state as in the past, and it is difficult to clearly indicate the installation state of the projector to other users. Furthermore, when the projecting and retracting legs are provided in two or more places as in the projector described in Patent Document 1, the projecting amount of each leg is adjusted sensuously, and the projector is placed horizontally. There was a problem that it was difficult to maintain the state.

  An object of the present invention is to provide a projector that can easily determine the amount of protrusion of the leg from the housing and can easily adjust the projection direction of the optical image, and a projection system including the projector. It is in.

The projector of the present invention includes a light source device, a light modulation device that modulates light emitted from the light source device according to image information to form an optical image, and a projection that enlarges and projects the formed optical image on a projection surface A projector comprising an optical device and a housing for housing these, wherein the housing includes a leg portion that projects from the housing and tilts the projection direction of the optical image, the part along said protruding direction from the housing is provided with a plurality of regions at predetermined intervals, in the respective regions, different labels are attached to the other adjacent areas, the projector, the leg A storage means for storing exposure sign information in which a protrusion amount of a part is associated with a sign that is closest to the casing among the signs exposed from the casing in accordance with the protrusion amount, and the entire projector is controlled Control means for The means includes a trapezoid correction unit that corrects trapezoidal distortion generated in an image displayed on the projection surface due to the inclination of the projection direction of the optical image, and a screen generation unit that generates a setting screen for setting a correction amount by the trapezoid correction unit. with the door, on the setting screen, the correction marker indicating the correction amount corresponding to the amount of projection, and wherein Rukoto configured with a label associated with the exposure indicator information in accordance with the amount of protrusion .

Here, the sign is a mark that allows the user of the projector to easily recognize each area, and examples thereof include a color, a pattern, and a number.
Therefore, according to such a configuration, the projector leg is provided with a plurality of regions at predetermined intervals along the protruding direction from the housing, and each region has a different sign from other adjacent regions. Therefore, the projector user confirms the sign on the most housing side (hereinafter referred to as an exposure sign) among the signs exposed from the housing according to the protruding amount of the leg, The protruding amount of the leg can be easily determined.

  Therefore, it becomes easy to install the projector in the same state as the projector in the past, and it becomes easy to clearly instruct other users about the installation state of the projector. Furthermore, it is easy to keep the projector in a horizontal state even when there are two or more legs that project and retract.

In the present invention, the storage means for storing the exposure amount information in which the protrusion amount of the leg portion and the mark that is closest to the housing among the marks exposed from the housing according to the protrusion amount are associated. And a control means for controlling the entire projector, wherein the control means corrects a trapezoidal distortion that occurs in an image displayed on the projection surface due to an inclination of the projection direction of the optical image, and the keystone correction. And a screen generation unit that generates a setting screen for setting a correction amount by a unit, and a correction marker indicating the correction amount according to the protrusion amount is displayed on the setting screen according to the protrusion amount. Ru is set with a label associated with the information.

  According to such a configuration, since the control means includes the trapezoid correction unit and the screen generation unit, the projector user sets the correction amount by the keystone correction unit on the setting screen generated by the screen generation unit. By doing so, it is possible to correct the trapezoidal distortion that occurs in the image displayed on the projection surface when the leg portion protrudes from the casing and the projection direction of the optical image is inclined.

  On the setting screen, a correction marker indicating a correction amount corresponding to the protrusion amount is set with a sign associated with the exposure mark information according to the protrusion amount. Therefore, the user of the projector can set the correction amount indicated by the correction marker of the same mark as the exposure mark on the setting screen when the projector leg is protruded. For example, if the correction marker is set so as to indicate a correction amount such that the image displayed on the projection surface in each protrusion amount is substantially rectangular, the projector user is displayed on the projection surface. An image can be easily made into a substantially rectangular shape.

In the present invention, each of the labels is preferably of a different color.
According to such a configuration, since each sign has a different color, the projector user can easily check and remember the exposure sign. Therefore, it is possible to more easily determine the protruding amount of the leg portion.

  In the present invention, a detection unit that detects the protrusion amount and an operation unit that outputs an operation signal that causes the control unit to execute a predetermined operation are provided, and the control unit calculates the correction amount based on the operation signal. A correction amount acquisition unit to be acquired, a protrusion amount detection unit that causes the detection means to detect the protrusion amount based on the operation signal, and an association with the exposure marker information according to the protrusion amount detected by the protrusion amount detection unit A correction amount storage that associates the sign acquired by the sign acquisition unit, the correction amount acquired by the correction amount acquisition unit, and the label acquired by the sign acquisition unit and stores them as correction amount information in the storage unit And a marker setting unit that causes the screen generation unit to set the correction marker based on the correction amount information.

According to such a configuration, the projector can set the correction marker on the setting screen by the operation of the operation means by the user.
Specifically, the user of the projector first tilts the projection direction of the optical image by projecting and retracting the leg portion from the housing. Then, by operating the operation means, for example, the correction amount is input via the setting screen so that the image displayed on the projection surface has a substantially rectangular shape.

  In this state, when the projector user operates the operation unit, the correction amount acquisition unit acquires the correction amount input by the user, and the protrusion amount detection unit causes the detection unit to detect the protrusion amount of the leg. . Then, the sign acquisition unit acquires a sign associated with the exposure sign information according to the protrusion amount detected by the protrusion amount detection unit, the correction amount storage unit, the correction amount acquired by the correction amount acquisition unit, The label acquired by the label acquisition unit is associated with and stored in the storage means as correction amount information.

  Therefore, the correction amount information is associated with a correction amount according to the protrusion amount of the leg when the projector user operates the operation means, and a mark associated with the exposure mark information according to the protrusion amount. ing. Then, the marker setting unit causes the screen generation unit to set a correction marker based on the correction amount information, so that the projector user operates the operation means to adjust the protrusion amount of the leg portion. A correction marker indicating the correction amount input by the user can be set on the setting screen.

Projection system of the present invention, the aforementioned projector, e Bei a screen in which the optical image is projected, the screen projection area markers indicating the projection area corresponding to the amount of protrusion of the leg, the Of the signs exposed from the casing according to the amount of protrusion, the signs are set closest to the casing.

According to such a configuration, when the projector and the screen are installed in a predetermined positional relationship, the projection amount of the projector leg can correspond to the projection area of the optical image projected on the screen. it can. Therefore, the user of the projection system can easily project the optical image onto the projection area indicated by the marker for any projection area by checking the exposure marker.
In addition, the projection system of the present invention includes a light source device, a light modulation device that modulates light emitted from the light source device according to image information to form an optical image, and enlarges and projects the formed optical image on a projection surface. A projection optical device, and a projector including a housing that accommodates these, and a screen on which the optical image is projected, the housing projecting from the housing and projecting the optical image A leg portion that inclines the direction, and the leg portion is provided with a plurality of regions at predetermined intervals along a protruding direction from the housing, and each region is different from other adjacent regions. A marker is attached to the screen, and a projection area marker indicating a projection area corresponding to the protruding amount of the leg portion is located on the most housing side among the markers exposed from the casing according to the protruding amount. Set with signs in It is characterized in.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[Configuration of the projection system]
FIG. 1 is a schematic diagram showing the external appearance of the projection system 1.
As shown in FIG. 1, the projection system 1 modulates light emitted from a light source according to image information to form an optical image, and projects the formed optical image. And a screen 3 on which an image based on the projected optical image is displayed.
In the present embodiment, the positional relationship between the projector 2 and the screen 3 is fixed and installed.

[External configuration of the projector]
FIG. 2 is a perspective view of the projector 2 as viewed from the upper front side.
The projector 2 modulates the light emitted from the light source according to image information to form an optical image, and enlarges and projects the formed optical image on the screen 3. As shown in FIG. And a projection lens 5 exposed from the outer case 4.
The projection lens 5 as a projection optical device enlarges and projects an optical image formed by a liquid crystal panel 212 (see FIG. 4) described later, and is configured as a combined lens in which a plurality of lenses are housed in a lens barrel. Has been.

The exterior case 4 as a housing is made of synthetic resin having a substantially rectangular plane shape, and houses an apparatus main body including an image projection means 21 (see FIG. 4) described later.
As shown in FIG. 2, an operation panel 41 that performs startup / adjustment operation of the projector 2 is provided at a substantially central portion on the rear side of the upper surface of the outer case 4 so as to extend in the left-right direction.
The operation panel 41 as an operation means is provided with an operation button 411 including a menu button (not shown) for calling up a menu screen, and a circuit (not shown) disposed inside the operation panel 41 when the operation button 411 is appropriately pressed. Contact the tact switch mounted on the board. As a result, an operation signal for causing the control means 24 (see FIG. 4) described later to execute a predetermined operation is output from the circuit board.

A cutout 42 through which air that has cooled the inside of the projector 2 is discharged is formed on the side surface of the exterior case 4, and the louver 42 </ b> A is exposed from the cutout 42. The louver 42A rectifies the air exhausted from the notch 42.
In addition, adjustment leg portions 43R and 43L are provided at two positions on both ends of the front long side direction on the bottom surface portion of the outer case 4 and at positions near the upper side of the adjustment leg portions 43 on the front surface portion of the outer case 4. Are provided with an adjustment button 44 for adjusting the protruding amount of each adjustment leg 43.

Here, FIG. 3 is a view showing a state in which each adjustment leg 43 is protruded from the exterior case 4.
Each adjustment leg 43 as a leg protrudes from the outer case 4 and separates the front surface side of the outer case 4 from the installation surface of the projector 2, so that the outer case 4 is separated from the installation surface of the projector 2. The projection direction of the optical image projected from the projection lens 5 is tilted. As shown in FIG. 3, each adjustment leg 43 includes a shaft portion 431 configured to protrude and retract in an out-of-plane direction from the bottom surface portion of the outer case 4, and the shaft portion 431 on the side opposite to the outer case 4. A grounding portion 432 provided at one end and in contact with the installation surface of the projector 2.

  The shaft portion 431 is provided with a plurality of regions at predetermined intervals along the projecting direction from the exterior case 4, and in each region, the blue 431B, the green 431G, the yellow 431Y, and the red 431R are sequentially arranged from the grounding portion 432 side. Each has a different color. That is, in this embodiment, each marker is configured with a different color.

The adjustment button 44 regulates the protrusion and depression of each adjustment leg 43 from the outer case 4 and can be released by being pressed. Moreover, the adjustment button 44 can adjust the protrusion amount of each adjustment leg part 43 in steps.
Specifically, grooves (not shown) are formed in the shaft portion 431 at the same predetermined intervals as each region, and the adjustment button 44 is engaged with these grooves when the adjustment button 44 is not pressed. A locking portion (not shown) to be stopped is provided. The groove portion of the shaft portion 431 and the engaging portion of the adjustment button 44 are fitted inside the outer case 4 to restrict the adjustment legs 43 from protruding and retracting from the outer case 4. When the adjustment button 44 is pressed, the locking portion of the adjustment button 44 does not fit into the groove portion of the shaft portion 431 and the restriction is released, so that each adjustment leg portion 43 protrudes from the exterior case 4. Can be killed.

In addition, the position of the groove portion of the shaft portion 431 is a position where each region of each adjustment leg portion 43 is exposed from the outer case 4 step by step. That is, the regulation of the adjustment leg 43 by the adjustment button 44 is performed for each region of the shaft 431 as a unit. For example, when the amount of protrusion of each adjustment leg 43 is set as the amount of protrusion in the first stage, the blue color 431 </ b> B attached to the shaft portion 431 is exposed from the exterior case 4. Further, when the protruding amount of each adjustment leg 43 is set as the protruding amount of the second stage, the green color 431G attached to the shaft portion 431 is further exposed from the exterior case 4.
In the following description, the color that is closest to the exterior case 4 among the colors exposed from the exterior case 4 according to the amount of protrusion at each stage is referred to as an exposure color (exposure sign). Therefore, the exposure color at the first stage protrusion amount is blue, and the exposure color at the second stage protrusion amount is green.

When projecting each adjustment leg 43 from the exterior case 4, the user of the projection system 1 first presses the adjustment button 44. As a result, the regulation of the protrusion and depression of each adjustment leg 43 is released, and the user of the projection system 1 can pull out each adjustment leg 43 from the bottom surface of the exterior case 4 in the out-of-plane direction.
Then, the user of the projection system 1 releases the adjustment button 44 in a state in which each adjustment leg 43 is pulled out until an area with an arbitrary color is exposed from the outer case 4. As a result, the groove portion of the shaft portion 431 and the locking portion of the adjustment button 44 are fitted inside the outer case 4 so that the protrusions and depressions of the respective adjustment leg portions 43 are restricted. Fixed in quantity.

[Internal configuration of projector]
FIG. 4 is a block diagram illustrating a schematic configuration of the projector 2.
As shown in FIG. 4, the projector 2 is roughly composed of an image projection unit 21, a detection unit 22, a storage unit 23, and a control unit 24.
The image projection means 21 modulates the light emitted from the light source according to image data (image information) to form an optical image, and enlarges and projects the formed optical image onto the screen 3, as shown in FIG. As shown, a light source device 211, a liquid crystal panel 212, and the projection lens 5 described above are provided.

The light source device 211 includes a light source lamp 213 configured by an ultrahigh pressure mercury lamp, and the light source lamp 213 emits light toward the liquid crystal panel 212.
The light source lamp 213 is not limited to an ultra-high pressure mercury lamp, but a discharge light source lamp such as a metal halide lamp or a xenon lamp, or various self-light emitting elements such as a light emitting diode, a laser diode, an organic EL element, or a silicon light emitting element. May be.

A liquid crystal panel 212 serving as a light modulation device is a transmissive liquid crystal panel that changes the arrangement of liquid crystal molecules enclosed in a liquid crystal cell (not shown) based on image data, and emits light emitted from a light source lamp 213. 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 5.
The projection lens 5 enlarges and projects the optical image emitted from the liquid crystal panel 212 toward the screen 3.

  Although not shown, the projector 2 includes a color light separation optical system that separates light emitted from the light source lamp 213 into light of three colors of RGB (Red Green Blue). The projector 2 includes three liquid crystal panels 212 corresponding to the three colors RGB. Further, the projector 2 includes a combining optical system that generates an optical image representing a color image by combining three color optical images. As for the configuration of such an optical system, various general projector optical system configurations can be used.

  The detecting means 22 detects the amount of protrusion of each adjustment leg 43 from the outer case 4 and can be configured by connecting a linear encoder to each adjustment leg 43, for example. The protruding amount of each adjustment leg 43 detected by the detection means 22 is output to the control means 24 described later.

The storage unit 23 stores a program, data, and the like for the control unit 24 to execute a predetermined process. In addition, the storage unit 23 projects each adjustment leg 43 and the color of each color exposed from the exterior case 4 according to each projection. Of these, exposure color information (exposure sign information) associated with the color closest to the exterior case 4, that is, the exposure color, is stored.
Specifically, the protruding amount of each adjustment leg 43 in the exposure color information is information indicating how many stages each adjustment leg 43 protrudes from the exterior case 4. Therefore, the exposure color information is associated with information indicating the level of protrusion and the exposure color at each level. For example, in the present embodiment, information indicating the amount of protrusion at the first stage and blue are associated, and information indicating the amount of protrusion at the second stage is associated with green.

  The control unit 24 includes, for example, a CPU (Central Processing Unit) and the like, and is a part that controls the entire projector 2. As shown in FIG. 4, the image processing unit 241, the correction amount acquisition unit 242, A protrusion amount detection unit 243, a color acquisition unit 244, and a correction amount storage unit 245 are provided. These components 241 to 245 are connected by a bus (not shown) so that necessary information can be transmitted.

The image processing unit 241 includes, for example, a GPU (Graphics Processor Unit) and the like, and performs image processing. The image generation unit 246, a keystone correction unit 247, a video memory 248, a marker setting unit, and the like. 249.
The image generation unit 246 as a screen generation unit generates image data in units of frames by sampling an image data signal input from a PC (Personal Computer) or the like, and sets a correction amount by a trapezoid correction unit 247 described later. Generate a setting screen. The setting screen generated by the image generation unit 246 will be described in detail later.

The trapezoidal correction unit 247 corrects trapezoidal distortion that occurs in the image displayed on the screen 3 due to the inclination of the projection direction of the optical image by the projection lens 5. Specifically, the image data generated by the image generation unit 246 is subjected to image processing and converted into image data that has been previously distorted into a trapezoid. Then, the keystone correction unit 247 stores the image processed image data in the video memory 248.
Note that, for example, the correction amount (image data) by the trapezoid correction unit 247 cancels each other with the distortion direction and distortion amount of the trapezoid distortion generated in the image displayed on the screen 3 due to the inclination of the projection direction of the optical image by the projection lens 5. By setting the (distortion direction and distortion amount), the image displayed on the screen 3 can be substantially rectangular.

  Then, the image processing unit 241 outputs the image data stored in the video memory 248 to the image projection unit 21, and the image projection unit 21 forms an optical image based on the image data stored in the video memory 248 to form a screen. 3 is enlarged and projected.

  Based on the correction amount information stored in the storage unit 23, the marker setting unit 249 causes the image generation unit 246 to display a correction marker 612 indicating the correction amount by the trapezoid correction unit 247 according to the protrusion amount of each adjustment leg 43. (See FIG. 5) is set. The correction amount information is stored in the storage unit 23 by the correction amount storage unit 245 described later. The correction amount information and the correction marker 612 will be described in detail later.

The correction amount acquisition unit 242 acquires the correction amount by the trapezoid correction unit 247 based on the operation signal output from the operation panel 41.
The protrusion amount detection unit 243 causes the detection unit 22 to detect the protrusion amount of each adjustment leg 43 from the outer case 4 based on the operation signal output from the operation panel 41.
Specifically, when the amount of protrusion of each adjustment leg 43 is detected by the detection means 22, the protrusion amount detection unit 243 determines how many steps each adjustment leg 43 has from the outer case 4 based on the amount of protrusion. Detect if it is protruding.

The color acquisition unit 244 as a sign acquisition unit acquires a color associated with the exposure color information according to the protrusion amount detected by the protrusion amount detection unit 243.
For example, in the present embodiment, the color acquisition unit 244 acquires the blue color when each adjustment leg 43 protrudes from the outer case 4 to the first level, and when it protrudes to the second level, Get green.
The correction amount storage unit 245 stores the correction amount acquired by the correction amount acquisition unit 242 and the color acquired by the color acquisition unit 244 in the storage unit 23 as correction amount information.

Here, FIG. 5 is a diagram illustrating a setting screen generated by the image generation unit 246.
The setting screen 6 includes a scroll bar 61 and a marker setting button 62 as shown in FIG.
The scroll bar 61 includes a bar 611, and the correction amount by the trapezoid correction unit 247 is changed by the movement of the bar 611. The scroll bar 61 sets 0 when image processing is not performed on the image data generated by the image generation unit 246, and lengthens the upper part of the image displayed on the screen 3 in the + direction (right direction in FIG. 5). The distortion direction in which the lower part is shortened is used as the distortion direction, and the-direction (left direction in FIG. 5) is the distortion direction in which the upper part of the image displayed on the screen 3 is shortened and the lower part is lengthened.
Further, the ratio between the upper part and the lower part of the image displayed on the screen 3, that is, the amount of distortion increases as the image moves in the + direction or the − direction.

The marker setting button 62 is used to set a correction marker 612 that indicates a correction amount by the trapezoid correction unit 247 corresponding to the protruding amount of each adjustment leg 43.
Specifically, when the marker setting button 62 is pressed by the operation of the operation panel 41 by the user of the projection system 1, the correction amount acquisition unit 242 calculates the correction amount by the trapezoid correction unit 247 at the time of pressing. The protrusion amount detection unit 243 obtains the detection unit 22 to detect the protrusion amount of each adjustment leg 43 from the outer case 4. Accordingly, the correction amount storage unit 245 stores the correction amount information in the storage unit 23.

Then, the marker setting unit 249 generates the correction marker 612 indicating the correction amount by the trapezoidal correction unit 247 corresponding to the protruding amount of each adjustment leg 43 based on the correction amount information stored in the storage unit 23. Set in the unit 246. At this time, the correction marker 612 is set at the lower position of the scroll bar 61 corresponding to the correction amount acquired by the correction amount acquisition unit 242 with the color acquired by the color acquisition unit 244.
In the present embodiment, blue, green, yellow, and red correction markers 612 that are the colors assigned to the respective regions of the shaft portion 431 can be set on the setting screen 6.

  Here, when the level of the protruding amount of each adjustment leg 43 when the marker setting button 62 is pressed is the same, the color acquired by the color acquisition unit 244 is one color, and the correction markers 612A and 612B. As shown, the correction marker 612 is set in one color. On the other hand, when the level of protrusion of each adjustment leg 43 is different when the marker setting button 62 is pressed, the color acquired by the color acquisition unit 244 is exposed according to the protrusion of the adjustment leg 43R. The correction marker 612 is set in two colors, as shown in the correction marker 612C. That is, the color of the right side portion of the correction amount marker 612C is in accordance with the protruding amount of the adjusting leg portion 43R, and the color of the left side portion is in accordance with the protruding amount of the adjusting leg portion 43L.

[Screen configuration]
As shown in FIG. 1, a projection area marker 31 indicating a projection area corresponding to each step of the protruding amount of each adjustment leg 43 is exposed on the screen 3 at each step of the protruding amount of each adjustment leg 43. The color is set at the four corner positions of the projection area.
Specifically, the projection area marker 31B indicating the projection area when the protrusion amount of each adjustment leg 43 is the protrusion amount in the first stage is set in blue as the exposure color in the first stage protrusion amount. ing. Further, the projection area marker 31G indicating the projection area when the protruding amount of each adjustment leg 43 is the protruding amount at the second stage is set in green, which is the exposure color at the protruding amount at the second stage.
In FIG. 1, illustration of a projection area marker indicating a projection area corresponding to the amount of protrusion at other stages is omitted.

[How to adjust the image displayed on the screen]
Next, a method for adjusting the image displayed on the screen 3 will be described.
First, the user of the projection system 1 turns on the power of the projector 2 and projects an optical image on the screen 3. Next, the user of the projection system 1 selects any projection area marker from among the projection area markers 31 set on the screen 3. Then, the user of the projection system 1 confirms the color of the selected projection area marker 31 and adjusts the amount of protrusion at the stage where the adjusted color is exposed by projecting and retracting each adjustment leg 43.

  In the following description, it is assumed that the user of the projection system 1 has selected the projection area marker 31B. Accordingly, since the color of the projection area marker 31B is blue, the user of the projection system 1 adjusts the protrusion amount when the adjustment legs 43R and 43L protrude from the exterior case 4 and the blue 431B is exposed. .

In this state, the user of the projection system 1 opens a menu screen (not shown) by pressing the menu button on the operation button 411 of the operation panel 41, and further sets the operation by operating the operation panel 41 on this menu screen. Open screen 6.
Then, the user of the projection system 1 moves the bar 611 of the scroll bar 61 of the setting screen 6 by operating the operation panel 41.

When the bar 611 is moved and the correction amount by the trapezoidal correction unit 247 is changed, the keystone correction unit 247 performs image processing on the image data in conjunction with this and converts it into image data distorted into a trapezoid shape. Store in the video memory 248. As a result, the keystone correction of the image displayed on the screen 3 is performed in conjunction with the movement of the bar 611, so that the user of the projection system 1 moves the bar 611 while viewing the image displayed on the screen 3. To adjust the image.
With the adjustment method described above, the user of the projection system 1 can change the image displayed on the screen 3 to an arbitrary shape, for example, a substantially rectangular shape, in the projection area where the projection area marker 31B is set. An optical image can be projected.

[Correction marker setting process]
Next, the setting process of the correction marker 612 will be described with reference to FIG.
FIG. 6 is a flowchart showing a process for setting the correction marker 612.
When the marker setting button 62 is pressed by the user of the projection system 1 in a state where the image is adjusted by the method for adjusting the image displayed on the screen 3 described above, a circuit arranged inside the operation panel 41 An operation signal is output from the substrate to the control means 24, and the control means 24 executes the following steps S1 to S4.

When the operation signal is input to the control unit 24, the correction amount acquisition unit 242 acquires the correction amount by the trapezoid correction unit 247. Specifically, the correction amount set on the setting screen 6 is acquired (step S1).
When the correction amount is acquired by the correction amount acquisition unit 242, the protrusion amount detection unit 243 causes the detection unit 22 to detect the protrusion amount of each adjustment leg 43 from the outer case 4 (step S2). That is, the protrusion amount detection unit 243 detects that each adjustment leg 43 protrudes from the outer case 4 to the first stage.

When the protrusion amount is detected by the protrusion amount detection unit 243, the color acquisition unit 244 acquires a color associated with the exposure color information according to the protrusion amount (step S3). That is, the color acquisition unit 244 acquires the blue color associated with the information indicating the first stage protrusion amount.
When the color is acquired by the color acquisition unit 244, the correction amount storage unit 245 associates the correction amount acquired by the correction amount acquisition unit 242 with the color acquired by the color acquisition unit 244 and stores the correction amount in the storage unit 23. The information is stored (step S4).

Through the above steps S1 to S4, the correction amount information is stored in the storage unit 23. Then, the marker setting unit 249 causes the image generation unit 246 to set the correction marker 612 that indicates the correction amount by the trapezoid correction unit 247 corresponding to the protruding amount of each adjustment leg 43 based on the correction amount information. As a result, the correction marker 612 is set on the setting screen 6.
Specifically, the correction marker 612 is blue acquired by the color acquisition unit 244, and the lower position of the scroll bar 61 corresponding to the correction amount acquired by the correction amount acquisition unit 242, that is, the use of the projection system 1. It is set at the lower position of the bar 611 when the marker setting button 62 is pressed by the user.

When the correction marker 612 is set by the above steps S1 to S4, the correction amount information is stored in the storage unit 23. Therefore, the projection area where the projection area marker 31B is set is set from the next time. Can easily project an optical image.
That is, the user of the projection system 1 sets the correction amount indicated by the blue correction marker 612 on the setting screen 6 without performing the above-described method for adjusting the image displayed on the screen 3. An optical image can be easily projected onto the projection area where the projection area marker 31B is set.

The projection system 1 according to the present embodiment has the following effects.
(1) Each adjustment leg 43 is provided with a plurality of regions at predetermined intervals along the protruding direction from the outer case 4, and different colors 431B, 431G, 431Y, 431R are attached to the respective regions. Therefore, the user of the projection system 1 can easily determine the protruding amount of each adjustment leg 43 by confirming the exposure color.
(2) On the setting screen 6, a correction marker 612 that indicates a correction amount according to the protrusion amount of each adjustment leg 43 from the exterior case 4 is displayed in a color associated with the exposure color information according to the protrusion amount. Therefore, the user of the projection system 1 can easily display the image displayed on the screen 3 by setting the correction amount indicated by the correction marker 612 having the same color as the exposure color on the setting screen 6. Can be adjusted.

(3) Since the projector 2 can set the correction marker 612 on the setting screen 6 by the operation of the operation panel 41 by the user, the projection amount of each adjustment leg 43 from the outer case 4 can be reduced. The correction marker 612 indicating the correction amount input by the user can be set on the setting screen 6.
(4) On the screen 3, the projection area marker 31 indicating the projection area corresponding to each step of the protruding amount of each adjustment leg 43 is displayed in the exposure color in each step of the protruding amount of each adjustment leg 43. Therefore, the user of the projection system 1 can project an optical image on a projection area where an arbitrary projection area marker 31 is set by confirming the exposure color. .

[Modification of Embodiment]
It should be noted that the present invention is not limited to the above-described embodiment, and modifications, improvements, etc. within a scope that can achieve the object of the present invention are included in the present invention.
In the above embodiment, the shaft portion 431 is provided with four regions, but it is sufficient that two or more regions are provided.
In the above-described embodiment, each region of the shaft portion 431 is given a different color. However, for example, two colors may be alternately given to each region. In short, each region is adjacent to each other. It suffices if a color different from the region to be applied is given.
In the above-described embodiment, the color is adopted as the sign. However, for example, a pattern, a number, or the like may be used, and any sign that can recognize each region may be used.

  In the embodiment, the correction marker 612 is set on the setting screen 6 by the operation of the operation panel 41 by the user of the projection system 1. However, for example, the positional relationship between the projector and the screen is fixed. The correction marker may be attached to the setting screen from the beginning. In short, it is only necessary that a correction marker indicating a correction amount corresponding to the protrusion amount of the leg portion is attached to the setting screen.

In the embodiment described above, the projector 2 is provided with the respective adjustment leg portions 43 at two locations, but may be provided at one location, for example, or may be provided at three or more locations. In short, it is only necessary that the projection direction of the optical image can be inclined by projecting and retracting the leg portion from the housing.
In the above-described embodiment, each adjustment leg 43 is configured such that the amount of protrusion from the outer case 4 can be adjusted stepwise. However, the adjustment leg 43 may be configured so that it can be adjusted continuously. What is necessary is just to comprise so that the protrusion amount from can be adjusted.

In the above-described embodiment, each adjustment leg 43 is configured to protrude and retract from the outer case 4 by pressing the adjustment button 44. However, the adjustment leg 43 may be configured to protrude and retract by other configurations. For example, like the projector described in Patent Document 1, a leg portion having a screw shaft may be provided, and the leg portion may be configured to protrude and retract from the housing by rotating the screw shaft.
In the above-described embodiment, the projection area marker is attached to the screen 3, but the projection system may be configured by a normal screen or the like that is not attached with the projection area marker.

In the embodiment, the transmissive liquid crystal panel 212 is used. However, the present invention is not limited to this, and a reflective liquid crystal panel may be used, or a digital micromirror device (DMD) may be used. . DMD is a trademark of Texas Instruments Incorporated.
In the above-described embodiment, the three liquid crystal panels 212 are provided. However, the present invention is not limited to this, and only one liquid crystal panel 212 is provided. Two liquid crystal panels 212 are provided. Four or more liquid crystal panels are provided. 212 may be provided.

  The present invention can be particularly suitably used for a projector and a projection system in which the positional relationship with respect to the screen is fixed.

1 is a schematic diagram showing an appearance of a projection system according to an embodiment of the present invention. The perspective view which looked at the projector in the said embodiment from the upper front side. The figure which shows the state which protruded the adjustment leg part in the said embodiment from the exterior case. The block diagram which shows schematic structure of the projector in the said embodiment. The figure which shows the setting screen produced | generated by the image generation part in the said embodiment. The flowchart which shows the attachment method of the correction marker in the said embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Projection system, 2 ... Projector, 3 ... Screen, 4 ... Exterior case (casing), 5 ... Projection lens (projection optical apparatus), 6 ... Setting screen, 22 ... Detection means, 23 ... Storage means, 24 ... Control Means 31, 31B, 31G ... Marker for projection area, 41 ... Operation panel (operation means), 44 ... Adjustment leg (leg), 211 ... Light source device, 212 ... Liquid crystal panel (light modulation device), 241 ... Image Processing unit, 242 ... Correction amount acquisition unit, 244 ... Color acquisition unit (label acquisition unit), 245 ... Correction amount storage unit, 246 ... Image generation unit (screen generation unit), 247 ... Trapezoid correction unit, 249 ... Marker setting unit 431B ... blue, 431G ... green, 431Y ... yellow, 431R ... red, 612, 612A, 612B, 612C ... correction markers.

Claims (5)

A light source device, a light modulation device that modulates light emitted from the light source device according to image information to form an optical image, a projection optical device that enlarges and projects the formed optical image on a projection surface, and A projector having a housing for storing inside the projector;
The housing is
A leg that protrudes from the housing and tilts the projection direction of the optical image;
The legs are provided with a plurality of regions at predetermined intervals along the protruding direction from the housing, and each region is provided with a label different from other adjacent regions ,
The projector
Storage means for storing exposure mark information in which the protrusion amount of the leg and the mark that is exposed from the housing according to the protrusion amount are associated with the mark that is closest to the housing;
Control means for controlling the entire projector,
The control means includes
A trapezoid correction unit that corrects a trapezoidal distortion generated in an image displayed on the projection surface due to an inclination of the projection direction of the optical image;
A screen generation unit for generating a setting screen for setting a correction amount by the trapezoidal correction unit,
Wherein the setting screen, projector correction marker indicating the correction amount corresponding to the amount of projection, and wherein Rukoto configured with a label associated with the exposure indicator information in accordance with the amount of protrusion. The projector according to claim 1, wherein
Each of the signs has a different color. In the projector according to claim 1 or 2 ,
Detecting means for detecting the protrusion amount;
An operation means for outputting an operation signal for causing the control means to execute a predetermined operation,
The control means includes
A correction amount acquisition unit that acquires the correction amount based on the operation signal;
A protrusion amount detector that causes the detection means to detect the protrusion amount based on the operation signal;
A sign acquisition unit for acquiring a sign associated with the exposure sign information according to the protrusion amount detected by the protrusion amount detection unit;
A correction amount storage unit that associates the correction amount acquired by the correction amount acquisition unit with the sign acquired by the sign acquisition unit and stores the correction amount as correction amount information in the storage unit;
A projector comprising: a marker setting unit that causes the screen generation unit to set the correction marker based on the correction amount information. A projector according to any one of claims 1 to 3 ,
E Bei a screen in which the optical image is projected,
On the screen, a projection area marker indicating a projection area according to the protrusion amount of the leg is set as a sign closest to the housing among the signs exposed from the housing according to the protrusion amount. Projection system characterized by that. Light source equipment, the optical modulation equipment to form an optical image by modulating in accordance with image information light emitted from the light source device, a projection optical system for enlarging and projecting the projection surface the optical image formed, and these a projector having a housing for accommodating therein a
A screen on which the optical image is projected,
The housing is
A leg that protrudes from the housing and tilts the projection direction of the optical image;
The legs are provided with a plurality of regions at predetermined intervals along the protruding direction from the housing, and each region is provided with a label different from other adjacent regions ,
On the screen, a projection area marker indicating a projection area according to the protrusion amount of the leg is set as a sign closest to the housing among the signs exposed from the housing according to the protrusion amount. projection system characterized that you have been.

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