Representation method

Abstract

To solve the problem in which: in installing a projector, when a projection surface such as a screen is not prepared, an installer has difficulty in grasping the size of a projection image.SOLUTION: When a projector projects a first image on a first projection surface distant by a first distance from the projector, the projector projects, on the first projection surface, the first image indicating the size of a second image projected on a second projection surface distant by a second distance different from the first distance from the projector.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present disclosure relates to a display method. [Background technology]

[0002] There is known a technique for displaying a guide screen on a screen. The remote control device of Patent Document 1 includes a guide screen projection mechanism. The guide screen projection mechanism projects a guide screen on the screen with a screen size equivalent to that of the screen projected by the projector body. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2002-162690 A Summary of the Invention [Problem to be solved by the invention]

[0004] When installing a projector, there are cases where a projection surface such as a screen is not prepared. In such cases, the installer must adjust the position of the projector using a substitute screen, etc. However, the installer does not know the distance between the actual projection surface and the projector, making it difficult to grasp the size of the projected image. [Means for solving the problem]

[0005] In the display method disclosed herein, when a projector projects a first image onto a first projection surface that is a first distance away from the projector, the projector also projects onto the first projection surface the first image indicating the size of a second image to be projected onto a second projection surface that is a second distance away from the projector, the second distance being different from the first distance. [Brief description of the drawings]

[0006] [Figure 1] FIG. 1 is a perspective view showing an external appearance of a projector. [Diagram 2] FIG. 1 is a schematic diagram showing the internal configuration of a projector. [Diagram 3] FIG. 2 is a diagram showing functional blocks of the projector. [Figure 4] FIG. [Diagram 5] A schematic diagram showing how to set up a projector on the top of a desk as the projection surface. [Figure 6] FIG. 2 is a diagram showing the state when the projector is installed. [Figure 7] FIG. 13 is a diagram showing an outline of an image projected onto a floor surface. [Figure 8] FIG. 13 is a diagram showing a projected image showing an expected projection range. [Figure 9] A diagram showing the user interface. [Figure 10] FIG. 11 is a flowchart showing a process for displaying a projected image. [Figure 11] A schematic diagram showing how to set up a projector on a wall as the projection surface. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0007] 1. Projector 1 Configuration In this embodiment, a projector 1 including three light modulation devices is illustrated as a projection display device. Fig. 1 is a perspective view showing the external appearance of the projector 1 as a projection display device. Fig. 2 is a schematic diagram showing the internal configuration of the projector 1.

[0008] The projector 1 modulates light emitted from a light source device 4, which will be described later, to form an image according to image information. The projector 1 is a projection-type image display device that enlarges and projects the formed image onto a projection surface such as a screen.

[0009] 1, the projector 1 includes an exterior housing 2 that constitutes the exterior. The exterior housing 2 is substantially rectangular, and includes a top surface 21, a bottom surface 22, a front surface 23, a rear surface 24, a left side surface 25, and a right side surface 26.

[0010] The bottom surface portion 22 has a plurality of legs 221 and an attachment portion (not shown). The attachment portion is connected to a ceiling suspension device 100 (described later). The front surface portion 23 is a housing portion located on the image projection side. The front surface portion 23 has an opening 231 that exposes a part of the projection optical device 36. An image is projected from the projection optical device 36 through the opening 231. An exhaust port 232 is provided in the front surface portion 23. From the exhaust port 232, cooling gas that has cooled the cooling target inside the projector 1 is exhausted to the outside of the exterior housing 2. An inlet port 261 is provided in the right side surface portion 26. From the inlet port 261, gas such as air outside the exterior housing 2 is introduced into the interior of the exterior housing 2 as cooling gas.

[0011] As shown in Fig. 2, the projector 1 includes a light source device 4, a uniforming device 31, a color separation device 32, a relay device 33, an image forming device 34, an optical housing 35, and a projection optical device 36 inside the exterior housing 2. The light source device 4 emits illumination light. The configuration of the light source device 4 will be described later. Note that Fig. 2 omits illustration of the above-mentioned exhaust port 232 and inlet port 261. In addition, although not shown, the projector 1 includes a control device that controls the operation of the projector 1, a power supply device that supplies power to electronic components of the projector 1, and a cooling device that cools the light source device 4 and the like.

[0012] The homogenizer 31 is disposed in the traveling direction of the illumination light emitted from the light source device 4. The illumination light emitted from the light source device 4 is incident on the homogenizer 31. The homogenizer 31 includes a first multi-lens array 311, a second multi-lens array 312, a polarization conversion element 313, and a superimposing lens 314. These components are disposed in the above order in the traveling direction of the illumination light emitted from the light source device 4. The homogenizer 31 homogenizes the illumination light emitted from the light source device 4. The homogenized illumination light is emitted from the homogenizer 31.

[0013] A color separation device 32 is disposed in the traveling direction of the illumination light emitted from the homogenizer 31. The illumination light emitted from the homogenizer 31 is incident on the color separation device 32. The color separation device 32 includes a first dichroic mirror 321 as a first color separation element, a second dichroic mirror 322 as a second color separation element, a reflecting mirror 323 as a mirror, a first field lens 341R, and a second field lens 341G.

[0014] The color separation device 32 separates the light incident from the homogenizer 31 into each color light. The illumination light incident on the color separation device 32 reaches a first dichroic mirror 321. The first dichroic mirror 321 is disposed adjacent to the superimposing lens 314 of the homogenizer 31.

[0015] The first dichroic mirror 321 reflects the first light belonging to the first wavelength band contained in the illumination light emitted from the homogenizer 31 toward the reflecting mirror 323, and transmits light other than the first wavelength band. The first wavelength band is, for example, a wavelength band in the red light region, and the wavelength bands other than the first wavelength band are wavelength bands in the green light region and the blue light region. The wavelength band of the red light region is not particularly limited, but is generally in the range of 610 nm to 750 nm. The wavelength band of the blue light region is not particularly limited, but is generally in the range of 430 nm to 495 nm. The wavelength band of the green light region is not particularly limited, but is generally in the range of 495 nm to 570 nm.

[0016] The first light is, for example, red light, and the light outside the first wavelength band is green light and blue light. Here, the red light is approximately red light, the green light is approximately green light, and the blue light is approximately blue light. The first wavelength band is not limited to the red light region, but may be the green light region or the blue light region, and the first light may be green light or blue light.

[0017] A reflecting mirror 323 is disposed in the traveling direction of the red light, which is the first light, reflected by first dichroic mirror 321. Reflecting mirror 323 reflects the red light reflected by first dichroic mirror 321 toward first field lens 341R. First field lens 341R collects the incident red light and emits it toward first incident-side polarizing plate 342R of image forming device 34.

[0018] A second dichroic mirror 322 is disposed in the traveling direction of the green light and blue light transmitted through the first dichroic mirror 321. The second dichroic mirror 322 reflects the second light, which belongs to a second wavelength band, of the green light and the blue light, and transmits the third light, which belongs to a wavelength band other than the second wavelength band. The second wavelength band is, for example, a green light region. The second light is green light, and the third light is blue light. The second wavelength band is not limited to the green light region, and may be a blue light region. The second light may be blue light, and the third light may be green light.

[0019] Second field lens 341G is disposed in the traveling direction of the green light, which is the second light, reflected by second dichroic mirror 322. Second field lens 341G collects the incident green light and emits it toward second incident-side polarizing plate 342G of image forming device 34.

[0020] Relay device 33 is disposed in the traveling direction of blue light, which is the third light that has passed through second dichroic mirror 322. The blue light is incident on relay device 33. Relay device 33 includes incident-side lens 331, a first reflecting mirror 332, a relay lens 333, a second reflecting mirror 334, and an exit-side lens 341B, which is a third field lens.

[0021] Blue light has a longer optical path than red and green light, and therefore tends to have a larger luminous flux. Therefore, the use of relay lens 333 prevents the luminous flux from expanding. Blue light incident on relay device 33 is converged by entrance-side lens 331, reflected by first reflecting mirror 332, and converges in the vicinity of relay lens 333. Blue light incident on relay lens 333 diverges toward second reflecting mirror 334 and exit-side lens 341B.

[0022] The second reflecting mirror 334 reflects the blue light emitted from the relay lens 333 and makes it incident on the emission-side lens 341B. The emission-side lens 341B collects the incident blue light and emits it toward the third entrance-side polarizing plate 342B of the image forming device 34.

[0023] The above-mentioned first dichroic mirror 321 and second dichroic mirror 322 are fabricated by forming dielectric multilayer films corresponding to the respective functions on transparent glass plates.

[0024] The image forming device 34 includes three incident-side polarizing plates, three light modulation devices, three viewing angle compensation plates 344, three exit-side polarizing plates 345, and a color synthesis device 346. The three light modulation devices are a first light modulation device 343R, a second light modulation device 343G, and a third light modulation device 343B. The first light modulation device 343R modulates red light, which is the first light. The second light modulation device 343G modulates green light, which is the second light. The third light modulation device 343B modulates blue light, which is the third light. The color synthesis device 346 is a color synthesis element that synthesizes the modulated lights of red, green, and blue modulated by each of the three light modulation devices.

[0025] The three light modulation devices modulate the light emitted from the light source device 4 according to image information. In this embodiment, the three light modulation devices are made of transmissive liquid crystal panels. The three incident side polarizers, the three light modulation devices, and the exit side polarizer 345 form a liquid crystal light valve. The light modulation devices are not limited to transmissive liquid crystal panels, and may be reflective liquid crystal panels, etc. The image forming device 34 may be a type that uses a DMD (Digital Micromirror Device) as a light modulation device, a type that combines one liquid crystal panel or one DMD with a color wheel, etc.

[0026] The color synthesis device 346 synthesizes the modulated light beams modulated by the three light modulation devices to form an image, and causes the image to enter the projection optical device 36. In this embodiment, the color synthesis device 346 uses a cross dichroic prism, but is not limited to this. The color synthesis device 346 may be configured, for example, by a plurality of dichroic mirrors.

[0027] The optical housing 35 accommodates therein the uniformizing device 31, the color separation device 32, the relay device 33, and the image forming device 34. Note that an illumination optical axis Ax, which is the optical axis of the uniformizing device 31, is set in the projector 1. The optical housing 35 holds the uniformizing device 31, the color separation device 32, the relay device 33, and the image forming device 34 at predetermined positions on the illumination optical axis Ax. The light source device 4 and the projection optical device 36 are also disposed at predetermined positions on the illumination optical axis Ax.

[0028] The projection optical device 36 enlarges and projects the image incident from the image forming device 34 onto a projection surface (not shown). The projection optical device 36 projects modulated light modulated by the first light modulation device 343R, the second light modulation device 343G, and the third light modulation device 343B. The projection optical device 36 is composed of, for example, a lens assembly in which multiple lenses are housed in a cylindrical lens barrel.

[0029] 3 shows functional blocks of the projector 1. The projector 1 includes a projection unit 50, a communication unit 60, a storage unit 70, a control unit 80, and a measurement unit 90.

[0030] The projection unit 50 projects an image onto a projection surface. The projection unit 50 corresponds to the light source device 4, the uniformizing device 31, the color separation device 32, the relay device 33, the image forming device 34, and the projection optical device 36 in FIG.

[0031] The communication unit 60 is a communication interface having a connector and an interface circuit. The communication unit 60 is a functional unit that transmits or receives various information from an external device, a measurement unit described later, etc. The communication unit 60 has a USB (Universal Serial Bus) terminal or a wired LAN (Local Area Network) terminal. The communication unit 60 may have a wireless communication board such as a Wi-Fi wireless communication board or a Bluetooth communication board, and may perform wireless communication with an external device. Here, USB, Wi-Fi, and Bluetooth are each registered trademarks.

[0032] The storage unit 70 is a memory such as a RAM (Random Access Memory) or a ROM (Read Only Memory). The storage unit 70 stores a control program 72 and output information 74. The control program 72 is a program that controls the projector 1. The output information 74 includes image information to be projected by the projection unit 50.

[0033] The control unit 80 is a controller that controls the projector 1. The control unit 80 includes one or more CPUs (Central Processing Units). The control unit 80 may include a programmable logic device such as an FPGA (Field-Programmable Gate Array). The control unit 80 executes the control program 72 stored in the storage unit 70, thereby functioning as an acquisition unit 82, a display control unit 84, and an output unit 86.

[0034] The acquisition unit 82 acquires information received by the communication unit 60. The acquisition unit 82 acquires measurement data measured by a measurement unit 90 (described later) and data received from an external device via the communication unit 60. The measurement data acquired by the acquisition unit 82 and the received data are output to the display control unit 84.

[0035] The display control unit 84 generates an image to be projected by the projection unit 50. The display control unit 84 generates an image based on the output information 74 stored in the storage unit 70. The display control unit 84 adjusts the output information 74 using the measurement data acquired by the acquisition unit 82 and the received data, and generates image data.

[0036] The output unit 86 outputs the image data generated by the display control unit 84 to the projection unit 50. The output unit 86 causes the projection unit 50 to project an image.

[0037] The measuring unit 90 measures the distance between the projector 1 and a floor surface PS1, which will be described later. The measuring unit 90 also measures the distance between the projector 1 and a top surface PS2 of a desk 500, which will be described later. The measuring unit 90 is a distance sensor or a depth sensor. The distance sensor is, for example, a light reflection type distance sensor having a light source that emits light and a light receiving unit that receives light reflected by a measurement object. The light source is an LED (light emitting diode) or a laser diode. The distance sensor is not limited to a method using light, and may be a method using radio waves or a method using ultrasonic waves. The depth sensor, for example, applies laser light to a measurement object and measures the distance to the measurement object by the time it takes for the light to bounce back. The measuring unit 90 may be an imaging camera or the like. In FIG. 3, the projector 1 has the measuring unit 90 built in, but is not limited to this. The measuring unit 90 may be an external sensor connected to the communication unit 60.

[0038] 2. Configuration of the ceiling suspension device 100 The projector 1 can be connected to the ceiling suspension device 100 by an attachment part (not shown) provided on the bottom surface part 22. The projector 1 is attached to the ceiling suspension device 100 by an installer M. FIG. 4 shows a schematic configuration of the ceiling suspension device 100. FIG. 4 shows the state in which the ceiling suspension device 100 is attached to an attachment surface S. The ceiling suspension device 100 is attached to the attachment surface S by the installer M. The attachment surface S in FIG. 4 is, for example, a ceiling. FIG. 4 shows an XYZ coordinate system. The X-axis, Y-axis, and Z-axis are mutually orthogonal. The X-axis is parallel to the attachment surface S and corresponds to the depth in FIG. 4. The Y-axis is parallel to the attachment surface S and corresponds to the left and right in FIG. 4. The Z-axis is perpendicular to the attachment surface S.

[0039] The ceiling suspension device 100 includes a fixed plate 101 , a first support plate 102 , a first support tube 104 , a joint 105 , a second support tube 106 , a second support plate 108 , and an attachment plate 109 .

[0040] The fixing plate 101 is fixed to the mounting surface S by means of screws or the like (not shown). By attaching the fixing plate 101 to the mounting surface S, the approximate position where the projector 1 is installed is determined.

[0041] The first support plate 102 is attached to the fixed plate 101. The first support plate 102 is supported so as to be movable relative to the fixed plate 101. The first support plate 102 is movable along an axis parallel to the X-axis and an axis parallel to the Y-axis. An installer M can adjust the mounting position of the projector 1 by moving the first support plate 102 relative to the fixed plate 101.

[0042] The first support tube 104 is rotatably supported by the first support plate 102. The first support tube 104 is rotatable about a rotation axis parallel to the Z axis. The first support tube 104 may be provided with a cable hole through which a power cable, a LAN cable, etc. are inserted.

[0043] The joint 105 joins the first support tube 104 and the second support tube 106. The joint 105 rotates the second support tube 106 about a rotation axis parallel to the X-axis.

[0044] The second support tube 106 is supported by the first support tube 104 via a joint 105. The second support tube 106 changes the attitude of the projector 1 by rotating about a rotation axis parallel to the X-axis. The second support tube 106 may be provided with a cable hole for inserting a power cable, a LAN cable, etc.

[0045] The second support plate 108 is supported by the second support tube 106. The second support plate 108 movably supports the mounting plate 109. The second support plate 108 may be provided with openings through which a power cable, a LAN cable, etc. are inserted.

[0046] The mounting plate 109 supports the projector 1. The mounting plate 109 is provided with screw holes (not shown). The installer M fastens the screw through the screw hole to the mounting portion provided on the bottom surface portion 22, thereby mounting the projector 1 to the mounting plate 109. The mounting of the projector 1 is not limited to using screws. The installer M may mount the projector 1 by engaging an engagement portion such as a hook provided on the mounting plate 109 with the mounting portion on the bottom surface portion 22. The mounting plate 109 is movable relative to the second support plate 108 along an axis parallel to the X-axis and an axis parallel to the Z-axis. The installer M can adjust the mounting position of the projector 1 by moving the mounting plate 109 relative to the second support plate 108.

[0047] 3. Installation method of the projector 1 according to the first embodiment In the installation method of the projector 1 of the first embodiment, an installer M attaches the projector 1 to the ceiling surface in accordance with the position of a desk 500 placed on a floor surface PS1. FIG. 5 shows an overview of the case where the projector 1 is installed with the top surface PS2 of the desk 500 as the projection surface. FIG. 6 shows the state when the projector 1 is installed. In the cases of FIGS. 5 and 6, the mounting surface S of the projector 1 is the ceiling surface. Hereinafter, the direction from the ceiling surface toward the floor surface PS1 is represented as the -Z direction. The direction from the floor surface PS1 toward the ceiling surface is represented as the +Z direction.

[0048] As shown in FIG. 5, the distance between the projector 1 and the floor surface PS1 is The distance between the projection position PH of the projector 1 and the floor surface PS2 is different from the distance between the projection position PH of the projector 1 and the floor surface PS2 of the desk 500. The distance H1 between the projection position PH of the projector 1 and the top surface PS2 of the desk 500 is The distance H1 corresponds to an example of a first distance. The distance H2 corresponds to an example of a second distance. This corresponds to an example of the distance. Projector 1 is attached to the top surface PS2 of desk 500 on an axis parallel to the Y axis. Along Was When an image with a width of L2 is projected, the image projected on the floor surface PS1 is aligned along an axis parallel to the Y axis. Along Was The width L1 of the image on the floor surface PS1 is L1 of the image on the top surface PS2 of the desk 500. The floor surface PS1 corresponds to an example of the first projection surface. S2 corresponds to an example of the second projection surface. 1 corresponds to an example of an image. Width L1 and width L2 are examples of indices indicating size.

[0049] As shown in FIG. 6, when an installer M installs a projector 1 at a high place such as a ceiling surface, he uses equipment 600 such as a stepladder. In order to use equipment 600, the installer M moves desk 500 when installing the projector 1. Because the installer M moves desk 500 when installing the projector 1, he is unable to adjust the installation position of the projector 1 by projecting an image onto the upper surface PS2 of desk 500. The installer M can adjust the installation position of the projector 1 by projecting an image onto floor surface PS1. The installer M adjusts the installation position of the ceiling suspension device 100 on the equipment 600. The installer M determines the approximate installation position by attaching the fixing plate 101 to the ceiling surface. The installer M fine-tunes the installation position of the projector 1 by adjusting the positions of the first support plate 102 and the second support plate 108.

[0050] The installer M projects an image when adjusting the mounting position of the projector 1 on the ceiling surface. Fig. 7 shows an outline of the image projected onto the floor surface PS1 in the state of Fig. 6. Fig. 7 shows the projectable range G0, the projection range G1, and the assumed projection range G2.

[0051] The projectable range G0 indicates the maximum image size that can be projected when an image is projected onto the floor surface PS1 using the projector 1. The projectable range G0 indicates the maximum reach of light that the projector 1 projects onto the floor surface PS1. The projectable range G0 corresponds to an example of the size of a projectable area. The size of an image indicates at least one of the width along an axis parallel to the X-axis and the width along an axis parallel to the Y-axis.

[0052] Projection range G1 indicates the range of an image projected onto floor surface PS1 when projector 1 projects an image of width L2 parallel to the Y axis onto top surface PS2 of desk 500. Projection range G1 results in an image of width L1 parallel to the Y axis. Projection range G1 in Fig. 7 is a virtual area, and is not projected when projector 1 is installed.

[0053] The expected projection range G2 is the range indicated by the projection image displayed when the installer M installs the projector 1 on the ceiling surface. The expected projection range G2 indicates the size of the image projected onto the upper surface PS2 of the desk 500. The projection image corresponds to an example of a first image. The expected projection range G2 is smaller than the projectible range G0. When the installer M installs the projector 1 on the ceiling surface, the projector 1 displays the projection image on the floor surface PS1. This allows the installer M to install the projector 1 in a desired mounting position while checking the size of the image projected onto the upper surface PS2 of the desk 500.

[0054] The projection image is generated based on the output information 74 stored in the memory unit 70 shown in FIG. 3. The projection image may be an image input from an external device via the communication unit 60. The projection image may be an image generated based on image information input from an external device via the communication unit 60. The projection image shown in FIG. 7 is a still image, but is not limited to this. The projection image may be a moving image. The projection image in FIG. 7 is a rectangle, but is not limited to this. The shape of the projection image can be changed as appropriate as long as it is an image showing the expected projection range G2.

[0055] The size of the assumed projection range G2 indicated by the projection image is preferably the size of the maximum range that can be projected onto the upper surface PS2 of the desk 500. Hereinafter, the size of the assumed projection range G2 indicated by the projection image is also referred to as the "size of the projection image." For example, the display control unit 84 adjusts the size of the projection image to the maximum range that can be projected onto the upper surface PS2 of the desk 500 based on the size of the upper surface PS2 of the desk 500 acquired by the acquisition unit 82. The size of the projection image corresponds to an example of the size of the first image. The maximum range that can be projected onto the upper surface PS2 of the desk 500 corresponds to an example of the maximum range that can be projected onto the second projection surface.

[0056] FIG. 8 shows an example of a projection image showing the assumed projection range G2. In FIG. 8, the assumed projection range G2 is shown by four mark images G2b. The mark images G2b correspond to an example of a projection image. One mark image G2b shown in FIG. 8 is composed of two straight lines. The two mark images G2b along an axis parallel to the Y axis indicate the width of the assumed projection range G2 along an axis parallel to the Y axis. The two mark images G2b along an axis parallel to the X axis indicate the width of the assumed projection range G2 along an axis parallel to the X axis. FIG. 8 shows four mark images G2b, but is not limited to this. The number and shape of the mark images G2b are not limited as long as they are images showing the assumed projection range G2.

[0057] As described above, the display method of projector 1 is such that when projector 1 projects an image onto floor surface PS1 that is a distance H1 away from projector 1, a projection image indicating the size of an image to be projected onto top surface PS2 of desk 500 that is a distance H2 different from distance H1 and away from projector 1 is projected onto floor surface PS1. The installer M can easily grasp, on the floor surface PS1, the size of the image projected onto the top surface PS2 of the desk 500, which is at a different distance from the projector 1 than the floor surface PS1.

[0058] Moreover, the size of the projection image is smaller than the size of a projectable range G0, which is the area of ​​the floor surface PS1 onto which the projector 1 can project the projection image. The projector 1 can project an image onto a floor surface PS1.

[0059] The projection image may also be an image input to the projector 1. The installer M can check the size of the desired image.

[0060] Furthermore, when the distance H2 is shorter than the distance H1, the projected image represents the maximum range that can be projected onto the top surface PS2 of the desk 500. The installer M can grasp the size of the largest image that can be projected onto the top surface PS2 of the desk 500 from the floor surface PS1 at a distance H1 away.

[0061] 3.1 How to generate a projected image A projection image is generated by the display control unit 84 processing the output information 74 stored in the storage unit 70. The display control unit 84 processes the output information 74 based on various information acquired by the acquisition unit 82. Each of a number of methods for generating projection image data for displaying a projection image will be described below. These methods can also be combined as long as they are not mutually contradictory.

[0062] 3.1.1 Generation of projection image data using measurement data The installer M installs the desk 500 on the floor surface PS1. The installation position of the desk 500 is The measurement unit 90 may be an external depth sensor. The installer M places the depth sensor above the desk 500 and near the ceiling surface. A first measurement distance from the depth sensor to the floor surface PS1 and a second measurement distance from the depth sensor The second measurement distance is measured from the projection lens 501 to the top surface PS2 of the desk 500. In the method of generating image data, the first measured distance corresponds to the first distance and the second measured distance corresponds to the second distance. 2 The depth sensor measures the distance including the first measured distance and the second measured distance. The data is transmitted to the projector 1. The depth sensor is connected to a computer (not shown). and transmits distance data to the projector 1 via the computer. The projector 1 receives the distance data through the communication unit 60. The communication unit 60 The data is output to the acquisition unit 82. The acquisition unit 82 transmits the input distance data to the display control unit 84. The display control unit 84 generates a projection image based on the input distance data.

[0063] The display control unit 84 calculates the size of the projection image using the distance data. The display control unit 84 calculates the ratio between the size of the image projected on the floor surface PS1 and the size of the image projected on the upper surface PS2 of the desk 500, for example, using the first measured distance, the second measured distance, and the size of the image projected on the upper surface PS2 of the desk 500. The size of the image projected on the upper surface PS2 of the desk 500 may be the size of the maximum range that can be projected on the upper surface PS2 of the desk 500, or may be a size specified by inputting a numerical value to the projector 1. The size of the maximum range that can be projected on the upper surface PS2 of the desk 500 can also be obtained by measuring the upper surface PS2 of the desk 500 with a depth sensor. The display control unit 84 specifies the size of the projection image using the calculated ratio and the first measured distance. The display control unit 84 generates projection image data of the specified size and outputs it to the output unit 86. The projection image data is a type of image data. The output unit 86 outputs the projection image data to the projection unit 50. The projection unit 50 projects a projection image onto the floor surface PS1 using the projection image data.

[0064] In the above description, the depth sensor measures the first measurement distance and the second measurement distance, but is not limited to this. When the size of the assumed projection range G2 on the floor surface PS1 is known, the depth sensor may measure at least one of the first measurement distance and the second measurement distance. The depth sensor transmits at least one of the measured first measurement distance and the second measurement distance to the projector 1. The display control unit 84 specifies the size of the projection image using at least one of the first measurement distance and the second measurement distance. In other words, it specifies the size of the range to be displayed as the assumed projection range G2 in the projection image data.

[0065] Furthermore, the distance data may be measured by a measuring unit 90 built into the projector 1, rather than by an external depth sensor. The installer M attaches the projector 1 to a temporary installation position on the ceiling surface. The installer M places a desk 500 on the floor surface PS1 below the projector 1 attached to the temporary installation position. The installer M measures the first measured distance and the second measured distance using the measuring unit 90 of the projector 1 attached to the temporary installation position. The measuring unit 90 outputs the distance data to the acquiring unit 82 via the communication unit 60.

[0066] As described above, the display method of the projector 1 measures at least one of the first distance and the second distance, and displays a projection image based on at least one of the first distance and the second distance. By using the actually measured distance, the projector 1 can display a projection image of a more accurate size, and can more accurately determine the size of the projection image to be projected onto the upper surface PS2 of the desk 500.

[0067] 3.1.2 Generation of projection image data using a camera The installer M puts a mark on the floor surface PS1 at a position corresponding to the expected projection range G2. The mark is an object that the installer M can move and can be recognized by analyzing an image captured by the camera. The mark is one or more marks, and indicates the size of the expected projection range G2. The installer M installs the camera on the ceiling surface or near the ceiling surface. When the measurement unit 90 is a camera, the projector 1 is installed on the ceiling surface or near the ceiling surface. The installer M uses the camera to detect the mark put on the floor surface PS1. The installer M outputs imaging data related to the detected mark to the acquisition unit 82 of the projector 1. The acquisition unit 82 outputs the acquired imaging data to the display control unit 84. The display control unit 84 generates projection image data based on the imaging data. The display control unit 84 specifies the size of the expected projection range G2 in the imaging data based on the size of the mark included in the imaging data or the arrangement of multiple marks. The display control unit 84 generates projection image data based on the correspondence between the captured image data and the projectable range G0 on the floor surface PS1, and the size of the identified assumed projection range G2. In this method, it is not essential for the projector 1 to acquire the first distance and the second distance.

[0068] 3.1.3 Generation of projection image data using CAD data The installer M acquires CAD (Computer Aided Design) data of the space in which the projector 1 is to be installed. The CAD data includes a first distance from the floor surface PS1 to the ceiling surface, the height of the desk 500, and the size of the top surface PS2. The CAD data may further include a second distance from the desk 500 to the ceiling surface. The CAD data includes a position where the projector 1 is to be attached. The CAD data may include dimensional data of the ceiling suspension device 100 and dimensional data of the projector 1. The CAD data corresponds to an example of information including at least one of the first distance and the second distance. The installer M transmits the acquired CAD data to the communication unit 60 of the projector 1 using an external device such as a computer. The installer M may connect a storage element such as a memory card including the CAD data to the projector 1 and have the projector 1 read the data.

[0069] The acquisition unit 82 of the projector 1 acquires CAD data. The acquisition unit 82 outputs the CAD data to the display control unit 84. The acquisition unit 82 may analyze the CAD data and extract data used in calculating the size of the projection image from the CAD data. The display control unit 84 specifies the size of the projection image using the CAD data. The display control unit 84 specifies the size of the projection image based on, for example, the distance from the assumed installation position where the projector 1 is installed to the floor surface PS1, the distance from the assumed installation position to the top surface PS2 of the desk 500, and the dimensions of the top surface PS2 of the desk 500. The display control unit 84 generates projection image data based on the specified size of the projection image.

[0070] As described above, the display method of the projector 1 accepts input of information including at least one of the first distance and the second distance, and displays a projection image based on at least one of the first distance and the second distance. By using the input information, the projector 1 can display a projection image of a more accurate size. The installer M can more accurately grasp the size of the image projected onto the upper surface PS2 of the desk 500.

[0071] 3.1.4 Generation of projection image data using a user interface FIG. 9 shows a user interface projected by the projector 1. The user interface will be referred to as UI hereinafter. The UI corresponds to an example of a reception image. The UI in FIG. 9 is used, for example, when the projector 1 has not acquired the distance from the floor surface PS1 to the top surface PS2 of the desk 500 and the dimensions of the top surface PS2. Hereinafter, the distance from the floor surface PS1 to the top surface PS2 of the desk 500 will be referred to as the expected projection distance. The dimensions of the top surface PS2 will be referred to as the expected size. The UI in FIG. 9 displays a projectable range G0, an expected projection range G2, a first slide mark 701, a first display bar 702, a second slide mark 704, and a second display bar 705. The expected projection range G2 is displayed in the projected image.

[0072] The first slide mark 701 displays the result of input to the projector 1 by the installer M. The installer M can change the position of the first slide mark 701 by operating a remote control or the like (not shown). The first slide mark 701 moves on the first display bar 702 by the operation of the installer M. The position of the first slide mark 701 indicates a distance setting related to the assumed projection distance. The position of the first slide mark 701 corresponds to an example of an input related to the second distance.

[0073] The first display bar 702 indicates the range in which the assumed projection distance can be changed by the operation of the installer M. The right end of the first display bar 702 indicates that the assumed projection distance is the shortest. In other words, the right end of the first display bar 702 indicates that the floor surface PS1 and the top surface PS2 of the desk 500 are closest. The left end of the first display bar 702 indicates that the assumed projection distance is the longest. In other words, the left end of the first display bar 702 indicates that the floor surface PS1 and the top surface PS2 of the desk 500 are the furthest.

[0074] The size of the expected projection range G2 changes in conjunction with the position of the first slide mark 701. When the first slide mark 701 moves to the right of the first display bar 702, the expected projection range G2 becomes larger. When the first slide mark 701 moves to the left of the first display bar 702, the expected projection range G2 becomes smaller.

[0075] The second slide mark 704 displays the results of input to the projector 1 by the installer M. The installer M can change the position of the second slide mark 704 by operating a remote control or the like (not shown). The second slide mark 704 moves on the second display bar 705 by operation of the installer M. The position of the second slide mark 704 indicates the size setting related to the size of the expected projection range G2.

[0076] The second display bar 705 indicates the range in which the size of the assumed projection range G2 can be changed by the operation of the installer M. The second display bar 705 indicates the range in which the assumed projection range G2 can be changed at the assumed projection distance set by the first slide mark 701. The right end of the second display bar 705 indicates the smallest assumed projection range G2 that can be projected by the projector 1. The left end of the second display bar 705 indicates the largest assumed projection range G2 that can be projected by the projector 1.

[0077] The size of the expected projection range G2 also changes in conjunction with the position of the second slide mark 704. When the second slide mark 704 moves to the right of the second display bar 705, the expected projection range G2 becomes smaller. When the second slide mark 704 moves to the left of the second display bar 705, the expected projection range G2 becomes larger.

[0078] The installer M changes the position of the first slide mark 701 to change the size of the assumed projection range G2. The installer M changes the size of the assumed projection range G2 to determine the size of the desired projection image. The projector 1 can generate a projection image based on the assumed projection distance input by the installer M. The projector 1 calculates a relative ratio between a first distance from the projector 1 to the floor surface PS1 and a second distance from the projector 1 to the top surface PS2 of the desk 500 based on the position of the first slide mark 701. Here, the distance to the top surface PS2 of the desk 500 is the assumed distance when the desk 500 is installed on the floor surface PS1. The projector 1 generates a projection image based on the relative ratio between the first distance and the second distance and the initial value in the UI of the assumed projection range G2.

[0079] The installer M may change the size of the expected projection range G2 by changing the position of the second slide mark 704. The installer M may determine the size of the projection image by changing the positions of the first slide mark 701 and the second slide mark 704.

[0080] The display method of the projector 1 is to display a UI that accepts input related to the distance from the projector 1 to the top surface PS2 of the desk 500, and change the size of the projected image based on the input related to the distance from the projector 1 to the top surface PS2 of the desk 500 that is accepted via the UI. The installer M can easily grasp the size of the image when the distance from the projector 1 to the top surface PS2 of the desk 500 is different.

[0081] As described above, the display method of the projector 1 displays a projection image based on at least one of the first distance and the second distance. By checking the size of the projected image projected at a position different from the top surface PS2 of the desk 500, the installer M can easily grasp the installation position of the projector 1.

[0082] 3.2 How to display projected images Fig. 10 shows a flow chart for displaying a projection image. Fig. 10 shows a flow for display by the projector 1 when an installer M installs the projector 1.

[0083] In step S101, the projector 1 acquires distance information or an assumed projection range G2. The distance information is at least one of the first distance and the second distance. As described above, the distance information is acquired by measurement using a depth sensor or the like, shooting results using a camera, or CAD data. The assumed projection range G2 is acquired using a user interface.

[0084] After acquiring the distance information or the assumed projection range G2, the projector 1 generates projection image data in step S103. The projection image data is generated by the above-mentioned method using the acquired distance information or the assumed projection range G2. The projection image data specifies the size of the projection image.

[0085] After generating the projection image data, the projector 1 displays a projection image based on the projection image data on the floor surface PS1 in step S105. The installer M can grasp the size of the image projected onto the upper surface PS2 of the desk 500 by checking the projection image displayed on the floor surface PS1.

[0086] 4. Installation method of the projector 1 according to the second embodiment Hereinafter, when the same configuration as in the first embodiment is used in the second embodiment, the same configuration is The installation method of the projector 1 according to the second embodiment is as follows. The projector 1 is installed at a position where it projects onto the wall surface PS2b by the person M. In this embodiment, when the installer M installs the projector 1, the projector 1 is directly connected to the wall PS2. The projector M is a person who is responsible for projecting images onto the wall b. The temporary screen PS1b is installed between the temporary screen PS1b and the temporary screen PS2b. S1b to project an image onto the wall P. FIG. 11 shows an outline of a case where the projector 1 is installed with S2b as the projection surface. This shows the temporary screen PS1b being set up. The temporary screen PS1b is The wall surface PS2b corresponds to an example of a first projection surface. The wall surface PS2b corresponds to an example of a second projection surface. The direction from the projector 1 to the wall PS2b is expressed as +Y direction. The direction toward the object 1 is represented as the -Y direction. The size of the projectable area is shown as width L3. Width L3 is the axis parallel to the Z axis. Followed The size of the projectable area of ​​the temporary screen PS1b is the area of ​​the first projection surface. This corresponds to an example of the size of the projectable area.

[0087] As shown in FIG. 11, the distance between the projector 1 and the temporary screen PS1b is The distance between the projector 1 and the wall PS2b is different from the projection position PH The distance H1b between the temporary screen PS1b and the projection position PH of projector 1 is The distance H1b is shorter than the distance H2b between the surface PS2b and the surface PS2b. The distance H1b corresponds to an example of the first distance. The distance H2b corresponds to an example of the second distance. On the row axis Followed When an image with a width of L2b is projected, the image projected onto the temporary screen PS1b is The image is aligned along an axis parallel to the Z axis. Followed The image will have a width of L1b. Image on temporary screen PS1b The width L1b of the image projected on the wall PS2b is shorter than the width L2b of the image projected on the wall PS2b. The image corresponds to an example of a second image.

[0088] When installing projector 1, installer M sets up a temporary screen PS1b parallel to the Z axis. On the row axis Followed A projection image with a width of L2b is projected onto the temporary screen PS1b. The image is, for example, a projected image in the assumed projection range G2 shown in FIG. While checking the image projected onto the screen PS1b, adjust the installation position of projector 1. Adjust.

[0089] For example, an installer M installs the projector 1 at a temporary installation position. A temporary screen PS1b is installed between the projector 1 and the wall surface PS2b. Using the measurement unit 90 of the projector 1, The display control unit 84 stores the measured size of the projectable area. Based on the output information 74, the projector 1 projects an axis parallel to the Z axis onto the temporary screen PS1b. To Followed A projection image having a width L2b is generated. The display control unit 84 controls the size of the generated projection image. The display control unit 84 compares the size of the generated projection image with the size of the stored projectable area. If it is determined that the size of the image is smaller than the size of the projectable area of ​​the temporary screen PS1b, Then, the projector 1 projects a projection image by the projection unit 50. The display control unit 84 The size of the generated projection image is larger than the size of the projectable area of ​​the temporary screen PS1b. If it is determined that the message is large, the display control unit 84 controls the projection unit 50 to project the message. The message included the content that it was not possible to display a projected image on the temporary screen PS1b. The message corresponds to an example of a notification indicating that the first image cannot be displayed. The projection image data to be displayed is generated by appropriately using any of the methods shown in the first embodiment. It is possible.

[0090] The display control section 84 may adjust the size of the projection image based on the stored size of the projectable area of ​​the temporary screen PS1b. The display control section 84 makes the size of the projection image smaller than the size of the projectable area of ​​the temporary screen PS1b.

[0091] As described above, in the display method of the projector 1, the size of the projection image is smaller than the size of the projectable area, which is the area of ​​the temporary screen PS1b onto which the projector 1 can project the projection image. The projector 1 can project the image onto the temporary screen PS1b. The installer M can grasp the size of the image projected onto the wall surface PS2b by checking the image projected onto the temporary screen PS1b.

[0092] In addition, in the display method of projector 1, when the size of the projection image is larger than the size of the projectable area, which is the area of ​​temporary screen PS1b onto which projector 1 can project the projection image, projector 1 displays a notification on temporary screen PS1b indicating that the projection image cannot be displayed. The installer M finds out that the projected image indicating the size of the image projected by the projector 1 onto the wall surface PS2b cannot be reproduced on the temporary screen PS1b. [Explanation of symbols]

[0093] 1...projector, 2...exterior housing, 4...light source device, 21...top surface portion, 22...bottom surface portion, 23...front surface portion, 24...rear surface portion, 25...left side surface portion, 26...right side surface portion, 31...uniformization device, 32...color separation device, 33...relay device, 34...image forming device, 35...optical housing, 36...projection optical device, 50...projection unit, 60...communication unit, 70...storage unit, 72...control program, 74...output information, 80...control unit, 82...acquisition unit, 84...display control unit, 86...output unit , 90... measuring unit, 100... ceiling suspension device, 101... fixed plate, 102... first support plate, 104... first support tube, 105... joint, 106... second support tube, 108... second support plate, 109... mounting plate, 221... legs, 231... opening, 232... exhaust port, 261... inlet, 311... first multi-lens array, 312... second multi-lens array, 313... polarization conversion element, 314... superimposing lens, 321... first dichroic 322...second dichroic mirror, 323...reflection mirror, 331...entrance side lens, 332...first reflection mirror, 333...relay lens, 334...second reflection mirror, 341R...first field lens, 341G...second field lens, 341B...exit side lens, 342R...first entrance side polarizing plate, 342G...second entrance side polarizing plate, 342B...third entrance side polarizing plate, 343R...first light modulation device, 343G...second light modulation device, 34 3B...third light modulation device, 344...viewing angle compensation plate, 345...exiting side polarizing plate, 346...color synthesis device, 500...desk, 600...equipment, 701...first slide mark, 702...first display bar, 704...second slide mark, 705...second display bar, G0...projectible range, G1...projection range, G2...expected projection range, G2b...mark image, PH...projection position, PS1...floor surface, PS1b...temporary screen, PS2...top surface, PS2b...wall surface, S...mounting surface.

Claims

1. When a projector projects a first image onto a first projection surface that is a first distance away from the projector, projecting the first image onto the first projection surface, the second image indicating a size of a second image to be projected onto a second projection surface at a second distance away from the projector, the second distance being different from the first distance; The projector includes: displaying a reception image for receiving an input related to the second distance; A display method, comprising: changing a size of the first image based on an input relating to the second distance received via the received image.

2. When a projector projects a first image onto a first projection surface that is a first distance away from the projector, projecting the first image onto the first projection surface, the second image indicating a size of a second image to be projected onto a second projection surface at a second distance away from the projector, the second distance being different from the first distance; When the size of the first image is larger than the size of a projectable area, which is an area of ​​the first projection surface onto which the projector can project the first image, The projector displays, on the first projection surface, a notification indicating that the first image cannot be displayed.

3. When a projector projects a first image onto a first projection surface that is a first distance away from the projector, projecting the first image onto the first projection surface, the second image indicating a size of a second image to be projected onto a second projection surface at a second distance away from the projector, the second distance being different from the first distance; If the second distance is less than the first distance, The first image represents a maximum area that can be projected onto the second projection surface.

4. The display method according to claim 2 , wherein the projector displays the first image based on at least one of the first distance and the second distance.

5. The projector includes: measuring at least one of the first distance and the second distance; The display method according to claim 4 , further comprising displaying the first image based on at least one of the first distance and the second distance.

6. The projector includes: accepting an input of information including at least one of the first distance and the second distance; The display method according to claim 4 , further comprising displaying the first image based on at least one of the first distance and the second distance.

7. The display method according to claim 1 , wherein the first image is an image input to the projector.

Images