JP7224969B2 - image projection device - Google Patents

Description

The present invention relates to an image projection apparatus (hereinafter referred to as projector) capable of curving an image surface.

Some projectors have a function of curving an image surface so that the entire projected image can be focused on a curved screen. Japanese Unexamined Patent Application Publication No. 2002-200001 discloses a projector that can adjust the curvature of field by changing the distance between lens groups in a projection optical system. Japanese Unexamined Patent Application Publication No. 2002-200003 discloses a projector capable of reducing the variation in angle of view that accompanies the field curvature adjustment of a projection optical system.

JP 2011-145580 A JP 2017-049422 A

However, with the projectors disclosed in Patent Documents 1 and 2, it is not possible to select a region of the image plane in which the focus position is to be moved when adjusting the curvature of field. For this reason, when field curvature adjustment is performed, focus adjustment is often required subsequently.

SUMMARY OF THE INVENTION The present invention provides a projector capable of easily selecting a region of an image plane for moving a focus position in field curvature adjustment.

An image projection apparatus as one aspect of the present invention projects an image onto a projection surface through a projection optical system. The image projection apparatus includes area display means for displaying a plurality of areas in which a focus position can be moved on a projected surface, and a focus position of a selected area from among the plurality of areas is moved to curve an image plane. The area display means displays a plurality of areas according to at least one of setting information of the image projection device and input signal information input to the image projection device. Characterized by changing .

A control method as another aspect of the present invention is applied to an image projection apparatus that projects an image onto a projection surface through a projection optical system. The control method includes the step of displaying, on the image projection device, a plurality of areas whose focus position can be moved on the projection surface, and moving the focus position of a selected area from among the plurality of areas to shift the image plane. and a step of controlling the projection optical system so as to be curved, wherein the step of displaying the plurality of regions is performed in accordance with at least one of setting information of the image projection device and input signal information input to the image projection device. is characterized by changing the display of the area of

A computer program that causes the computer of the image projection apparatus to execute processing according to the control method also constitutes another aspect of the present invention.

According to the present invention, it is possible to easily select an area for moving the focus position, and to easily adjust the curvature of field.

1 is a block diagram showing the configuration of a projector that is Embodiment 1 of the present invention. FIG. 4A and 4B are diagrams showing focus adjustment and an image plane in Embodiment 1. FIG. 4A and 4B are diagrams showing field curvature adjustment in the first embodiment; FIG. 8 is another diagram showing field curvature adjustment in the first embodiment. FIG. 4A and 4B are diagrams showing an adjustment guide image according to the first embodiment; FIG. 4 is another diagram showing an adjustment guide image in Example 1. FIG. 5 is still another diagram showing an adjustment guide image in Example 1. FIG. 4A and 4B are other diagrams showing an adjustment guide image according to the first embodiment; FIG. 4 is a flowchart showing processing in the first embodiment; FIG. 2 is a block diagram showing the configuration of a projector that is Embodiment 2 of the present invention. FIG. 10 is a diagram showing lens shift adjustment and curvature of field in Example 2; FIG. 10 is a diagram showing an adjustment guide image in Example 2; 8A and 8B are diagrams showing zoom adjustment and curvature of field in Embodiment 2; FIG. FIG. 11 is another diagram showing an adjustment guide image in Example 2; 9 is still another diagram showing an adjustment guide image in Example 2. FIG. 8 is a flowchart showing processing in the second embodiment; 3 is a block diagram showing the configuration of a projector that is Embodiment 3 of the present invention. FIG. 10 is a flowchart showing processing in Example 3. FIG. FIG. 10 is a diagram showing an adjustment guide image in a projector that is Embodiment 4 of the present invention;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows the configuration of a projector (image projection device) 100 that is Embodiment 1 of the present invention. The light source unit 101 is composed of various lamps such as a high-pressure mercury lamp and a metal halide lamp, an LED, a laser diode, or the like, and emits illumination light.

The light modulating unit 102 is composed of a light modulating element such as a liquid crystal panel or a digital micromirror device (DMD). The light modulation section 102 is driven according to a modulation drive signal from a modulation drive section 110 to be described later, forms an original image on its modulation surface, and modulates illumination light according to the original image.

The operation input unit 103 receives input of operation signals according to user operations. The operation signal is issued by a user's operation of an operation unit such as buttons and switches provided in the projector 100, a remote control device, a portable terminal device having a communication function, and the like. The operation input unit 103 that has received the input of the operation signal transmits operation information to the control unit 104 .

A control unit 104 as a control unit is configured by a program-controllable processor including a CPU, RAM/ROM, and the like. Based on the operation information received from the operation unit 103, the modulation drive unit 110, the field curvature adjustment unit 106, and the focus adjustment unit 105 are controlled.

The modulation driving section 110 has an OSD section 111 and a video processing section 112 . The video processing unit 112 performs various corrections such as signal decoding, interlace/progressive conversion, frame rate conversion, resolution conversion, aspect conversion, color correction, and shape conversion on a video signal input from the outside to produce a modulation video. A signal is generated, converted into a modulated drive signal, and output to the optical modulator 102 . The OSD unit 111 generates an OSD image signal for displaying OSD images such as menus, pointers and charts. The video processing unit 112 generates a video signal for modulation by synthesizing the OSD image signal with the video signal, converts this signal into a modulation drive signal, and outputs the signal to the light modulation unit 102 . The light modulation unit 102 is driven according to the modulation drive signal from the modulation drive unit 110 to form an original image, and modulates the illumination light according to the original image to generate a signal corresponding to the video signal (and OSD image signal). Generating image light for projecting an image.

The projection lens unit 200 has a projection optical system 200a that enlarges and projects image light (projection light) onto a projection surface 300 such as a screen to form a projection image. The projection optical system 200a is composed of optical elements (hereinafter referred to as lenses) such as a plurality of lens elements arranged in the optical axis direction, which is the direction in which the optical axis of the projection optical system 200a extends. The projection lens unit 200 includes a focus adjustment unit 105 that drives a focus lens for adjusting the image plane position (focus position on the projected surface), which is the position of the entire image plane of the projection optical system 200a in the optical axis direction, and a field curvature adjustment unit 106 that drives a curvature adjustment lens for adjusting the curvature of the field. The image plane is a plane on which a projection image, which is an image projected onto the projection surface from the projection optical system, is focused. In the following description, adjustment of the image plane position will be referred to as focus adjustment, and adjustment of curvature of field will be referred to as field curvature adjustment. The projection lens unit 200 may be provided integrally with the projector 100, or may be attached in a replaceable manner.

Focus adjustment will be described with reference to FIGS. 2A to 2C show the light modulation unit 102 shown in FIG. 1 shows a curvature adjustment lens (field curvature optical system) 106 a and an image plane 400 . Reference numeral 500 denotes the position of the modulation surface in the light modulation section 102, 501 denotes the reference position of the curvature adjustment lens 106a, 502 denotes the reference position of the focus lens 105a, and 503 denotes the reference position of the projection surface 300 (hereinafter referred to as the screen reference position). ) respectively.

Also, 600 is the focal length on the optical axis of the projection optical system 200a (the center of the projection image in the figure), and 601 and 602 are the focal lengths at peripheral positions away from the optical axis. In the projected image (image plane), a region that includes the position where the optical axes of the projection optical system 200a intersect and is close to the intersecting position is called a central region as a first region, and a region outside the central region is called a first region. It is called a peripheral area as a second area.

FIG. 2A shows a state in which the position of the image plane 400 as a plane matches the screen reference position 503 and the projected image is in focus. As shown in FIGS. 2B and 2C from the state of FIG. It moves back and forth with respect to the screen reference position 503 . Focus adjustment is thereby performed.

Field curvature adjustment will be described with reference to FIGS. 3A, 3B and 4A, 4B. As shown in FIGS. 3A and 3B, when the curvature adjustment lens 106a moves back and forth from its reference position 501, the focal lengths 601 and 602 of the projection optical system 200a with respect to the peripheral region of the image plane 400 do not change. The focal length 600 for the central region changes. That is, the focus position of the central area moves back and forth while the focus position of the peripheral area of the image plane 400 is fixed. This causes the image plane 400 to curve. Curving the image plane 400 by moving the focus position of the central region of the image plane 400 in this manner is referred to as first field curvature adjustment.

As shown in FIGS. 4A and 4B, both the focus lens 105a and the curvature adjustment lens 106a move back and forth from their reference positions 501 and 502, so that the focal length 600 with respect to the central region of the image plane 400 The focal lengths 601 and 602 with respect to the peripheral area change without any change in . That is, the focus position of the peripheral region moves back and forth while the focus position of the central region of the image plane 400 is fixed. This causes the image plane 400 to curve. Curving the image plane 400 by moving the focus position of the peripheral region of the image plane 400 in this manner is referred to as second field curvature adjustment.

Next, an OSD image (hereinafter referred to as an adjustment guide image) that serves as a guide for the user to select an area of the image plane 400 in which the user wishes to move the focus position back and forth by adjusting the field curvature (hereinafter referred to as a focus position movement area). ) will be described.

This guide display processing is performed by the area display means composed of the OSD section 111 and the image processing section 112 . Specifically, the control unit 104 that receives a focus position adjustment instruction as operation information from the operation input unit 103 causes the OSD unit 111 to create an adjustment guide image signal as an OSD image signal. The video processing unit 112 converts the modulation video signal obtained by synthesizing the adjustment guide image signal and the video signal into a modulation drive signal and outputs the modulation drive signal to the light modulation unit 102 . The adjustment guide image is projected and displayed on the projection surface 300 by driving the light modulation section 102 according to the modulation drive signal.

FIG. 5 shows an example of the adjustment guide image 310. As shown in FIG. The adjustment guide image 310 includes a first guide part 311 indicating a central area selectable as a focus position moving area and a second guide part 312 indicating peripheral areas (areas near four corners).

The user refers to the displayed adjustment guide image and selects the central area or the peripheral area as the focus position moving area through the operation input unit 103 . The control unit 104 performs the first field curvature adjustment shown in FIGS. 3A and 3B and the adjustment shown in FIG. , (b) of the second field curvature adjustment. The information on the focus position movement area also includes information on the movement direction of the focus position selected (instructed) by the user (near side or far side with respect to projector 100). move position.

6A to 6C show examples of the adjustment guide image 310. FIG. In FIGS. 6A to 6C, an adjustment guide image 310 is synthesized (superimposed) on a portion of the projection image 301 and displayed. When the user selects the central area as the focus position moving area, the first guide part 311 is highlighted as shown in FIG. A second guide part 312 is highlighted as shown. Further, when both the central region and the peripheral region are selected as the focus position moving region, that is, when the focus adjustment shown in FIG. 2 is selected, the first and the first 2 guide parts 311 and 312 are highlighted. In this way, the selected focus position moving area can be displayed in a visually easy-to-understand manner for the user.

Also, as shown in FIGS. 7A to 7C, the first and second guide parts 311 and 312 of the adjustment guide image 310 can be combined with the entire projection image 301 and displayed. Also in this case, when the central area is selected as the focus position moving area, when the peripheral area is selected, and when both of these are selected, FIGS. As shown in (c), one or both of the first and second guide parts 311, 312 are highlighted. Even in this case, the selected focus position moving area can be displayed in a visually easy-to-understand manner for the user.

Furthermore, as shown in FIG. 8, an adjustment guide image 310 may be displayed in which selectable focus position movement areas are represented by characters. FIG. 8 shows how the peripheral area is selected as the focus position moving area.

Focus position movement processing performed by the control unit 104 in this embodiment will be described with reference to the flowchart of FIG. This focus position moving process includes the guide display process described above. The control unit 104 as a computer executes this process according to a computer program. In the following description, "S" means step.

In S101, the control unit 104 causes the OSD unit 111 to generate an adjustment guide image signal in accordance with a focus position adjustment instruction output from the operation input unit 103 in accordance with a user operation, and further causes the video processing unit 112 to generate an adjustment guide image signal. to the optical modulation unit 102 . As a result, the adjustment guide image is projected and displayed.

Next, in S<b>102 , the control unit 104 acquires information on the focus position moving region selected by the user from the operation input unit 103 . As described above, the information on the focus position movement area also includes information on the movement direction of the focus position designated by the user (hereinafter referred to as the focus movement instruction direction).

Then, in S103, the control unit 104 determines whether or not the selected focus position movement area is only the center area.

In S104, the control unit 104 causes the field curvature adjustment unit 106 to drive the curvature adjustment lens 106a in the designated focus movement direction. Thereby, the first field curvature adjustment shown in FIG. 3(a) or FIG. 3(b) is performed.

On the other hand, in S105, the control unit 104 determines whether or not the selected focus position movement area is only the peripheral area.

In S106, the control unit 104 causes the focus adjustment unit 105 and the field curvature adjustment unit 106 to drive the focus lens 105a and the curvature adjustment lens 106a, respectively, in the designated focus movement direction. Thereby, the second field curvature adjustment shown in FIG. 4(a) or 4(b) is performed.

In S107, the control unit 104 determines whether the selected focus position movement area is both the central area and the peripheral area.

In S108, the control unit 104 causes the focus adjustment unit 105 to drive the focus lens 105a in the designated focus movement direction. Thereby, the focus adjustment shown in FIG. 2(b) or FIG. 2(c) is performed.

As described above, according to the present embodiment, it is possible to display an adjustment guide image that serves as a guide when the user selects a focus position movement area on the image plane. Therefore, the user can easily perform field curvature adjustment and focus adjustment.

It should be noted that when the curved image plane is returned to a flat plane by the first or second field curvature adjustment, the user is prompted to select either the central area or the peripheral area as the focus position movement area, and the control unit 104 is instructed according to the result of the selection. The field curvature adjustment unit 106 or this and the focus adjustment unit 105 are controlled.
In other words, depending on the user's selection of returning the focus position of the central area to the position before movement to return the image plane to the plane, or returning the focus position of the peripheral area to the position before movement to return the image plane to the plane. It controls the projection optical system 200a. This allows the curved image surface to be easily flattened according to user selection.

Embodiment 2 FIG. 10 shows the configuration of a projector 100' which is Embodiment 2 of the present invention. In this embodiment, the same reference numerals as in the first embodiment are given to the constituent elements common to the first embodiment. A projector 100 ′ of this embodiment differs from the projector 100 of Embodiment 1 in that it has a lens shift adjustment unit 107 . Also, the projection lens unit 200' in this embodiment differs from the projection lens unit 200 in the first embodiment in that it has a zoom adjustment section .

The lens shift adjustment section 107 includes a shift mechanism for shifting the projection lens unit 200' in directions (horizontal direction and vertical direction) orthogonal to the optical axis, either electrically or manually by the user, and a shift mechanism for shifting the projection lens unit 200' in each shift direction. and a sensor for acquiring a position (hereinafter referred to as a shift position). Further, the zoom adjustment unit 108 includes a zoom driving mechanism that electrically or manually moves the zoom lens (zoom optical system) of the projection optical system 200a′ in the optical axis direction to change the projection angle of view, and a zoom drive mechanism that changes the angle of view of the zoom lens. (hereinafter referred to as a zoom position).

11(a) to (d) show the projector 100', the projection lens unit 200', the image plane (projection image) 400 and the screen reference position 503 viewed from the side. Reference numeral 610 denotes the optical axis of the projection optical system 200a', and 620 denotes projection light.

11(a) and 11(b) show the case where the center of the image plane 400 is located on the optical axis 610, that is, the state where the projection lens unit 200' is not shifted. When the second field curvature adjustment described in Embodiment 1 is performed in FIG. Or move far away. Further, when the first field curvature adjustment described in the first embodiment is performed in FIG. move to the side or far side. In these cases, the amount of movement of the focus position from the screen reference position 503 increases concentrically with distance from the position on the optical axis 610 .

On the other hand, in FIGS. 11(c) and (d), the projection lens unit 200' is shifted only in the vertical direction so that the lower side of the image plane 400 is positioned on the optical axis 610 (this shift position is 50% vertical). shift position). When the second and first curvature of field adjustments are performed in this state, the movement amount of the focus position differs between the area on the upper side and the area on the lower side of the image plane 400 . As the positional relationship between the image plane 400 and the optical axis 600 changes in this way, the region and the amount of movement of the focus position change due to the curvature of field adjustment.

Therefore, in this embodiment, the control unit 104 acquires the current shift position of the projection lens unit 200 ′ from the lens shift adjustment unit 107 and notifies the OSD unit 111 of the modulation drive unit 110 . Then, the OSD unit 111 is caused to calculate the positions of the first and second guide parts according to the shift position, and generate an adjustment guide image signal capable of displaying these guide parts. As a result, an adjustment guide image including the first and second guide parts corresponding to the shift position is projected and displayed.

FIGS. 12A to 12C show the adjustment guide image 310' when the current shift position is the aforementioned vertical 50% shift position (horizontal shift position of 0% shift amount). This adjustment guide image 310' has a first guide part 311' indicating a first area including a position on the optical axis 600 in the projection image 301 (image plane 400) near its lower side, and a first guide part 311' near its upper side. and a second guide part 312' indicating a second area outside the area.

FIG. 12(a) shows a state in which the first guide part 311' is highlighted when the first area is selected as the focus position moving area. FIG. 12(b) shows a state in which the second guide part 312' is highlighted when the second area is selected as the focus position moving area. FIG. 12(c) shows a state in which the first and second guide parts 311' and 312' are highlighted when both the first and second areas are selected as the focus position moving area. show. In this way, even when the projection lens unit 200' is shifted, the selected focus position movement area can be displayed in a visually easy-to-understand manner for the user.

Note that the OSD section 111 may adjust the expansion and contraction of the first and second guide parts according to the shift position of the projection lens unit 200'. Also, the first and second guide parts for each shift position may be prepared (stored) in advance, and the first and second guide parts corresponding to the actual shift position may be selected and used.

13A and 13B also show the projector 100', the projection lens unit 200', the image plane (projected image) 400, and the screen reference position 503 as viewed from the side. As can be seen from these figures, when the projection optical system 200a' is zoomed, the width of the projection light 620, that is, the projection angle of view changes. Then, depending on the projection angle of view, the area to which the focus position is moved by adjusting the curvature of field and the amount of movement thereof are changed. Specifically, when the projection angle of view is small as shown in FIG. 13, the peripheral area in which the focus position can be moved becomes smaller than when the projection angle of view is large as shown in FIG. The amount of movement is also reduced.

The control unit 104 calculates the projection distance (the distance from the projection optical system 200a′ to the screen reference position 503) from the focus lens position (focus position) obtained from the focus adjustment unit 105 and the zoom position obtained from the zoom adjustment unit 108. demand. Then, the projection angle of view is calculated from the relation between the enlargement magnification (projection ratio) for each zoom position of the projection optical system 200a' held in advance and the projection distance. The control unit 104 notifies the modulation drive unit 110 of the calculated projection angle of view to cause the OSD unit 111 to calculate the positions of the first and second guide parts according to the notified angle of view of projection. to generate an adjustment guide image signal that can display . As a result, an adjustment guide image including the first and second guide parts corresponding to the zoom position is projected and displayed.

FIG. 14 shows an adjustment guide image when the projection angle of view is reduced from the projection angle of view shown in FIG. 13(a) to the projection angle of view shown in FIG. 13(b) in a state where the projection lens unit 200' is not shifted. showing. The size of the projected image 302 after zooming is smaller than the size of the projected image 301 before zooming. At this time, the size of the second guide part 312' in the adjustment guide image is also reduced compared to the size before zooming in accordance with the reduction in the peripheral area where the focus position can be moved. As a result, it is possible to clearly display the focus position moving region that changes according to the projection angle of view (zoom position).

Note that the OSD section 111 may adjust the expansion and contraction of the first and second guide parts according to the zoom position of the projection lens unit 200'. Also, the first and second guide parts for each zoom position may be prepared (stored) in advance, and the first and second guide parts corresponding to the actual zoom position may be selected and used.

Next, with reference to FIG. 15, the case where the light modulating section 102 forms an original image on a part of its modulating surface will be described. For example, the case where the aspect ratio of the modulation surface of the optical modulator 102 is 16:10 and the aspect ratio (input aspect ratio) of the input video signal is 4:3 will be described. In this case, as shown in FIG. 15, the video processing unit 112 generates a video image having a projection aspect ratio of 16:10 including a video region 320 having a 4:3 aspect ratio corresponding to the input aspect ratio and black regions 321 arranged at both left and right ends thereof. A modulated driving signal for projecting the projection image 301 is generated. The control unit 104 causes the OSD unit 111 to calculate the positions of the first and second guide parts 311' and 312' according to the input aspect and the projection aspect, and generate an adjustment guide image signal capable of displaying them. As a result, the adjustment guide image can be displayed in the image area 320 excluding the black area 321 of the projection image 301, and the focus position movement area can be displayed in an easy-to-understand manner.

Note that the OSD unit 111 may perform expansion/contraction adjustment for the first and second guide parts according to the input aspect and projection aspect. Alternatively, the first and second guide parts may be prepared (stored) in advance for each combination of the input aspect and projection aspect, and the first and second guide parts may be selected and used according to the actual combination. good.

In addition, although not shown, information on the resolution and aspect of the input video signal is acquired from the AVIInfoframe of the input video signal detected in the modulation drive unit 110, and the OSD unit 111 displays guide parts according to the information. A possible adjustment guide image signal may be generated.

Furthermore, if the video processing unit 112 has a function of correcting the video signal (for example, trapezoidal correction processing) in order to reduce the distortion of the projection image as distortion correction means, the OSD unit 111 performs the distortion correction. An adjustment guide image signal that can display guide parts according to the amount may be generated.

Also in this case, the OSD section 111 may perform expansion/contraction adjustment for the first and second guide parts according to the distortion correction amount. Alternatively, the first and second guide parts for each distortion correction amount may be prepared (stored) in advance, and the first and second guide parts may be selected and used according to the actual combination.

Focus position movement processing performed by the control unit 104 in this embodiment will be described with reference to the flowchart of FIG. 16 . In S201, the control unit 104 causes the OSD unit 111 to input the shift position, zoom position, input aspect, and projection position of the projection lens unit 200' in accordance with the focus position adjustment instruction output from the operation input unit 103 in accordance with the user's operation. Acquire information on the aspect and distortion correction amount. Then, the OSD section 111 is made to calculate the positions of the first and second guide parts 311' and 312' using these pieces of information.

Next, in S202, the control unit 104 causes the OSD unit 111 to generate an adjustment guide image signal for displaying the first and second guide parts 311' and 312' whose positions have been calculated. to output a modulated driving signal including an adjustment guide image signal to the light modulating section 102 . As a result, the adjustment guide image is projected and displayed.

The following S203 to S209 are respectively the same as S102 to S108 described in FIG. 9 of the first embodiment.

As described above, according to this embodiment, it is possible to display an adjustment guide image corresponding to the shift position, zoom position, input aspect, projection aspect, and distortion correction amount. Therefore, the user can easily adjust the curvature of field and focus.

Embodiment 3 FIG. 17 shows the configuration of a projector 100″ which is Embodiment 3 of the present invention. A projector 100″ has the same components as the projector 100′ of the second embodiment, but differs from the projector 100′ of the second embodiment in that a projection lens unit 200″ is replaceably attached. A projection lens unit 200″ in the embodiment differs from the projection lens unit 200′ in the second embodiment in that it has a lens recording section 109 as a storage means.

The lens recording unit 109 records lens information such as the model and identification information of the projection lens unit 200″, or information on the amount of curvature of field obtained by the projection optical system 200a′. ″ is obtained from the lens recording unit 109 and notified to the modulation driving unit 110 .

The OSD section 111 in the modulation drive section 110 stores in advance a plurality of projection lens units or first and second guide parts corresponding to the amount of curvature of field. The OSD unit 111 corresponds to the lens information or field curvature amount information received from the control unit 104 (that is, the currently attached projection lens unit 200″) among the first and second guide parts. First and second guide parts are selected, adjustment guide image signals for displaying these first and second guide parts are generated, and the video processing unit 112 modulates the adjustment guide image signals including the adjustment guide image signals. A drive signal is generated to project and display an adjustment guide image including the first and second guide parts for the projection lens unit 200″. That is, when a plurality of projection lens units having different field curvature amounts can be attached to the projector 100″, it is possible to display an adjustment guide image including guide parts corresponding to the currently attached projection lens unit. .

Focus position movement processing performed by the control unit 104 in this embodiment will be described with reference to the flowchart of FIG. 18 . In step S<b>301 , the control unit 104 sends lens information or field curvature amount information acquired from the lens recording unit 109 to the OSD unit 111 in response to a focus position adjustment instruction output from the operation input unit 103 in accordance with a user operation. Notice. Then, the OSD unit 111 is caused to select the first and second guide parts corresponding to the lens information or field curvature amount information notified to the OSD unit 111 .

Next, in S302, the control unit 104 instructs the OSD unit 111 in accordance with the focus position adjustment instruction output from the operation input unit 103 in accordance with the user's operation. , information on the projection aspect and distortion correction amount, and causes the OSD unit 111 to calculate the positions of the first and second guide parts using those information.

Next, in S303, the control unit 104 causes the OSD unit 111 to generate an adjustment guide image signal for displaying the first and second guide parts whose positions have been calculated, and transmits the adjustment guide image signal to the video processing unit 112. The modulation driving signal containing the signal is output to the optical modulation section 102 . As a result, the adjustment guide image is projected and displayed.

The following S304 to S310 are respectively the same as S102 to S108 described in FIG. 9 of the first embodiment.

As described above, according to this embodiment, it is possible to display an adjustment guide image corresponding to the currently attached projection lens unit among the plurality of projection lens units. Therefore, the user can easily adjust the curvature of field and focus.

FIG. 19 shows an adjustment guide image 310″ projected and displayed by the projector that is the fourth embodiment of the present invention. This adjustment guide image 310″ is a modification of the adjustment guide image 310 shown in the first embodiment. .

The adjustment guide image 310″ includes a first guide part 311″ as a rectangular frame indicating a central area selectable as a focus position moving area, and four second guide parts 312″ as rectangular frames indicating peripheral areas. including.
In this embodiment as well, it is possible to display an adjustment guide image that serves as a guide when the user selects a focus position movement area on the image plane. Therefore, the user can easily perform field curvature adjustment and focus adjustment.
(Other examples)
The present invention supplies a program that implements one or more functions of the above-described embodiments to a system or apparatus via a network or a storage medium, and one or more processors in the computer of the system or apparatus reads and executes the program. It can also be realized by processing to It can also be implemented by a circuit (for example, ASIC) that implements one or more functions.

Each embodiment described above is merely a representative example, and various modifications and changes can be made to each embodiment in carrying out the present invention.

100, 100′, 100″ Projector 104 Control unit 105 Focus adjustment unit 106 Field curvature adjustment unit 110 Modulation drive unit 200, 200′, 200″ Projection lens unit 310 Adjustment guide image

Claims (15)

An image projection device that projects an image onto a projection surface through a projection optical system,
area display means for displaying a plurality of areas in which the focus position can be moved on the projected surface;
a control means for controlling the projection optical system so as to move the focus position of a region selected from the plurality of regions to curve the image plane ;
The image projection apparatus, wherein the area display means changes display of the plurality of areas according to at least one of setting information of the image projection apparatus and input signal information input to the image projection apparatus. 2. The image projection apparatus according to claim 1, wherein said plurality of areas include at least a first area and a second area outside said first area in said image plane. When the control means controls the projection optical system so as to return the curved image plane to a flat surface, the control means returns the focus position of the selected region from among the plurality of regions to the position before the movement. 3. The image projection device according to claim 1 or 2, wherein When controlling the projection optical system so as to return the curved image plane to a flat surface, the control means moves the focus position of an area different from the selected area among the plurality of areas. 3. The image projection device according to claim 1 or 2. When all of the plurality of regions are selected, the control means controls the projection optical system so as to move the focus position of the plurality of regions and move the image plane while it is flat. 5. The image projection apparatus according to any one of claims 1 to 4, characterized by: a shift mechanism for shifting the projection optical system in a direction orthogonal to the optical axis direction of the projection optical system ;
6. The image projection apparatus according to claim 1, wherein said area display means changes display of said plurality of areas according to a shift position of said projection optical system. The projection optical system is capable of zooming to change the projection angle of view,
7. The image projection apparatus according to claim 1, wherein said area display means changes display of said plurality of areas according to said projection angle of view. The image projection device projects the image according to an input video signal,
8. The image according to any one of claims 1 to 7 , wherein said area display means changes display of said plurality of areas according to input aspect information of said video signal as said input signal information. projection device. 9. The image projection apparatus according to claim 1, wherein said area display means changes display of said plurality of areas according to projection aspect information of said image as said setting information. . The image projection device has distortion correcting means for correcting distortion of the image,
10. The image projection apparatus according to claim 1, wherein said area display means changes display of said plurality of areas according to said distortion correction information as said setting information . The image projection device is capable of exchanging the projection optical system,
11. The image projection apparatus according to claim 1, wherein said area display means changes display of said plurality of areas according to a projection optical system mounted on said image projection apparatus. . An image projection device that projects an image onto a projection surface through a projection optical system,
area display means for displaying a plurality of areas in which the focus position can be moved on the projected surface;
a control means for controlling the projection optical system so as to move the focus position of a region selected from the plurality of regions to curve the image plane;
The image projection apparatus, wherein the area display means changes the display of the plurality of areas according to at least one of zoom setting information of the projection optical system and identification information of the projection optical system. A control method for an image projection device that projects an image onto a projection surface through a projection optical system, comprising:
In the image projection device,
a step of displaying a plurality of areas in which the focus position can be moved on the projection surface;
and controlling the projection optical system to move the focus position of a region selected from the plurality of regions to curve the image plane ;
The step of displaying the plurality of areas is characterized by changing the display of the plurality of areas according to at least one of setting information of the image projection device and input signal information input to the image projection device. A control method for an image projection device. A control method for an image projection device that projects an image onto a projection surface through a projection optical system, comprising:
In the image projection device,
a step of displaying a plurality of areas in which the focus position can be moved on the projection surface;
and controlling the projection optical system to move the focus position of a region selected from the plurality of regions to curve the image plane.
The step of displaying the plurality of areas changes the display of the plurality of areas according to at least one of zoom setting information for zooming of the projection optical system and identification information of the projection optical system. A method of controlling a projection device. A computer program for causing a computer of an image projection apparatus that projects an image through a projection optical system to execute processing according to the control method according to claim 13 or 14 .

Images