Projector, method for controlling projector, and program

Abstract

To solve the problem in which: providing a distance measuring sensor increases the manufacturing cost of a projector.SOLUTION: A projector includes an optical device and a processing device. The processing device executes projecting a projection image including a first image on a projection surface by using the optical device, acquiring a first value related to a first length of the first image on the projection surface, and on the basis of the first value, outputting information indicating a third value corresponding to a second length of the projection image projected on the projection surface when the first length on the projection surface is defined as a second value.SELECTED DRAWING: Figure 17

Description

[Technical field]

[0001] The present disclosure relates to a projector, a method for controlling a projector, and a program. [Background technology]

[0002] There is known a projector that calculates the size of a projected image. The projector described in Patent Document 1 includes a distance measuring sensor that measures the distance from the projector to the screen. The projector measures the distance from the projector to the screen using the distance measuring sensor. The projector calculates the size of the projected image based on the measured distance from the projector to the screen. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2015-163930 A Summary of the Invention [Problem to be solved by the invention]

[0004] The projector described in Patent Document 1 includes a distance measuring sensor to calculate the size of the projected image. By including the distance measuring sensor, the manufacturing cost of the projector increases. [Means for solving the problem]

[0005] The projector of the present disclosure includes an optical device and a processing device, and the processing device performs the following operations: projecting a projection image including a first image onto a projection surface using the optical device; acquiring a first value related to a first length of the first image on the projection surface; and outputting information indicating a third value corresponding to a second length of the projection image projected onto the projection surface when the first length on the projection surface is set to a second value based on the first value.

[0006] A control method of a projector disclosed herein includes projecting a projection image including a first image onto a projection surface, acquiring a first value relating to a first length of the first image on the projection surface, and outputting information indicating a third value corresponding to a second length of the projection image projected onto the projection surface when the first length on the projection surface is set to a second value based on the first value.

[0007] The program disclosed herein causes a projector to project a projection image including a first image onto a projection surface, acquire a first value relating to a first length of the first image on the projection surface, and output information indicating a third value corresponding to a second length of the projection image projected onto the projection surface when the first length on the projection surface is set to a second value based on the first value. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram showing a schematic configuration of a projection system. [Diagram 2] FIG. 1 illustrates an external configuration of a projector. [Diagram 3] FIG. 1 illustrates an external configuration of a projector. [Figure 4] FIG. 1 is a diagram showing a schematic configuration of a projector. [Diagram 5] FIG. 1 is a diagram showing a schematic configuration of an image projection device. [Figure 6] FIG. 2 is a diagram showing a block configuration of a projector. [Figure 7] FIG. 4 is a diagram showing an example of a projected image including an OSD image. [Figure 8] FIG. 4 is a diagram showing an example of a projected image including an OSD image. [Figure 9] FIG. 4 is a diagram showing an example of a projected image including an OSD image. [Figure 10] FIG. 4 is a diagram showing an example of a projected image including an OSD image. [Figure 11] FIG. 4 is a diagram showing an example of a projected image including an OSD image. [Figure 12]FIG. 4 is a diagram showing an example of a projected image including an OSD image. [Figure 13] FIG. 4 is a diagram showing an example of a projected image including an OSD image. [Figure 14] FIG. 4 is a diagram showing an example of a projected image including an OSD image. [Figure 15] FIG. 4 is a diagram showing an example of a projected image including an OSD image. [Figure 16] FIG. 4 is a diagram showing an example of a projected image including an OSD image. [Figure 17] FIG. 1 is a diagram showing a control flow executed by the projector and a user. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Fig. 1 shows a schematic configuration of a projection system 1000. The projection system 1000 includes a projector 1 and an image providing device 500. The projector 1 projects a projection image PG onto a projection surface SC. The projection system 1000 shown in Fig. 1 includes, but is not limited to, one image providing device 500. A plurality of image providing devices 500 may be connected to the projector 1.

[0010] The projection surface SC displays the projection image PG projected from the projector 1. The projection surface SC shown in Fig. 1 is configured as a screen, but is not limited to this. The projection surface SC may be an indoor wall, a ceiling, an exterior wall of a building, etc. The shape of the projection surface SC is not limited to a flat surface, and may be a three-dimensional shape such as a curved surface, a surface having irregularities, or a spherical surface.

[0011] The projector 1 is disposed at a position facing the projection surface SC. The projector 1 is a short focus projector capable of projecting a projection image PG at a position close to the projection surface SC. As an example, the projector 1 can project a 100-inch projection image PG at a distance of 50 cm or less from the projection surface SC. The projector 1 is communicatively connected to the image providing device 500. The projector 1 may be communicatively connected to an image control device different from the image providing device 500. The projector 1 receives image data from the image providing device 500. The projector 1 projects the projection image PG onto the projection surface SC based on the image data. The projector 1 projects the projection image PG onto the projection surface SC based on display data stored inside.

[0012] The projector 1 includes a terminal 11. The terminal 11 is a connector for connecting to an external device such as an image providing device 500 via a wire. The projector 1 includes one or more terminals 11. In the projection system 1000 shown in Fig. 1, the image providing device 500 is connected to the terminal 11 via a wire. The projector 1 may also be connected to the image providing device 500 wirelessly.

[0013] The image providing device 500 is communicably connected to the projector 1. The image providing device 500 transmits image data to the projector 1. The image providing device 500 may have a function of adjusting the image shape of the projection image PG that the projector 1 projects onto the projection surface SC. The image providing device 500 is configured with a tablet terminal, a smartphone, a mobile computer, a desktop computer, or the like.

[0014] The projection system 1000 may include a remote control 90. The remote control 90 has an infrared communication function or a Bluetooth communication function. Bluetooth is a registered trademark. The remote control 90 communicates with the projector 1. The remote control 90 has a plurality of operation buttons 91. When a user operates the operation buttons 91, the remote control 90 transmits an operation signal to the projector 1. The projector 1 receives the operation signal and operates based on the operation signal.

[0015] FIG. 1 shows a schematic configuration of a projection image PG projected onto a projection surface SC. FIG. 1 shows a projection image PG with an aspect ratio of a:b. The aspect ratio is the ratio between the long side and the short side of the projection image PG. a and b are integers that represent the aspect ratio. The aspect ratio is, for example, 4:3, 16:9, or 16:10. The image width PW of the projection image PG shown in FIG. 1 is the length of the long side of the projection image PG projected onto the projection surface SC. The image height PH of the projection image PG shown in FIG. 1 is the length of the short side of the projection image PG projected onto the projection surface SC. The projection image PG projected onto the projection surface SC has a rectangular shape. The diagonal length Y is the length of the diagonal of the projection image PG projected onto the projection surface SC. The image width PW, image height PH, and diagonal length Y of the projection image PG projected onto the projection surface SC are an example of the length of the projection image PG projected onto the projection surface SC. FIG. 1 shows a virtual horizontal line VH. The virtual horizontal line VH is a line that passes through the center of the projection image PG and is parallel to the long side. The area above the virtual horizontal line VH is represented as a first area R1. The area below the virtual horizontal line VH is represented as a second area R2.

[0016] A number of figures including FIG. 1 show an XYZ coordinate system. The X axis is an axis perpendicular to the projection surface SC. The +X direction is a direction from the front to the back of the projection surface SC. The -X direction is a direction from the back to the front of the projection surface SC. The Y axis is an axis parallel to the long side of the projection image PG. The +Y direction is a direction from the left to the right of the projection surface SC. The -Y direction is a direction from the right to the left of the projection surface SC. The Z axis is an axis perpendicular to the Y axis in the projection surface SC and is parallel to the short side of the projection image PG. The +Z direction is the +Z direction in the left-handed system, and in the example of FIG. 1, when the projection image PG is a horizontally long image, it is a direction from the bottom to the top of the projection image PG. The -Z direction is a direction from the top to the bottom of FIG. 1.

[0017] Fig. 2 shows the external configuration of the projector 1. Fig. 2 is a perspective view of the projector 1 as viewed from the -X direction, +Y direction, and +Z direction. Fig. 2 is a view of the projector 1 as viewed from the front side, which is the opposite side to the surface facing the projection surface SC. The projector 1 includes an exterior housing 2.

[0018] The exterior housing 2 is the exterior of the projector 1. The exterior housing 2 houses various devices that constitute the projector 1. The exterior housing 2 is configured in a substantially rectangular parallelepiped shape. The exterior housing 2 has 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. The exterior housing 2 also has a plurality of legs 28. The exterior housing 2 corresponds to an example of a case.

[0019] The top surface 21 is disposed at a position in the +Z direction of the exterior housing 2. The top surface 21 has a top surface recess 211 and a passing opening 212. The top surface recess 211 is configured to have a shape recessed in the -Z direction. The passing opening 212 is provided at the bottom of the top surface recess 211. The passing opening 212 passes image light projected from the projection optical device 35. The projection optical device 35 will be described later.

[0020] The bottom surface 22 is disposed at a position in the -Z direction of the exterior housing 2. A plurality of legs 28 are provided on the bottom surface 22. When the projector 1 is disposed on an installation surface, the multiple legs 28 come into contact with the installation surface and support the projector 1.

[0021] The front face 23 is disposed at a position in the -X direction of the exterior housing 2. The front face 23 is a surface that faces a user of the projector 1. On the front face 23, a logo of the projector 1 or the like may be provided.

[0022] The rear surface 24 is disposed at a position in the +X direction of the exterior housing 2. The rear surface 24 is a surface facing the projection surface SC.

[0023] The left side surface 25 is disposed in a position in the -Y direction of the exterior housing 2. The left side surface 25 is connected to the top surface 21, the bottom surface 22, the front surface 23, and the rear surface 24. The left side surface 25 may be integral with any of the top surface 21, the bottom surface 22, the front surface 23, and the rear surface 24.

[0024] The right side surface 26 is disposed in a position in the +Y direction of the exterior housing 2. The right side surface 26 is connected to the top surface 21, the bottom surface 22, the front surface 23, and the rear surface 24. The right side surface 26 may be formed integrally with any of the top surface 21, the bottom surface 22, the front surface 23, and the rear surface 24. The right side surface 26 has a right side surface opening 261. The right side surface opening 261 functions as an inlet that takes in outside air into the interior of the exterior housing 2. The outside air is used as cooling gas.

[0025] Fig. 3 shows the external configuration of the projector 1. Fig. 3 is a perspective view of the projector 1 as viewed from the +X direction, the -Y direction, and the +Z direction. Fig. 3 is a view as viewed from the rear side of the projector 1, which is the surface opposite to the projection surface SC.

[0026] The rear surface 24 has a rear surface recess 241. The rear surface recess 241 is configured to have a shape recessed in the -X direction. A plurality of terminals 11 are provided in the rear surface recess 241. The projector 1 shown in FIG. 3 has a plurality of terminals 11, but is not limited to this. A single terminal 11 may be provided in the rear surface recess 241.

[0027] The left side surface 25 has a left side surface opening 251. The left side surface opening 251 functions as an exhaust port that exhausts gas from inside the exterior housing 2 to the outside. The projector 1 shown in FIGS. 2 and 3 has a configuration in which the right side surface opening 261 functions as an inlet and the left side surface opening 251 functions as an exhaust port, but is not limited to this configuration. A configuration in which the left side surface opening 251 functions as an inlet and the right side surface opening 261 functions as an exhaust port may also be used. The functions of the left side surface opening 251 and the right side surface opening 261 are determined by the layout of each device etc. housed in the exterior housing 2.

[0028] FIG. 4 shows a schematic configuration of the projector 1. FIG. 4 shows the internal configuration of the projector 1 as viewed from the +Z direction. The projector 1 includes an image projection device 3, a cooling device 4, a control device 5, and a power supply device 6 inside an exterior housing 2. The projector 1 includes units such as a memory 7 and a communication interface 8, which will be described later, inside the exterior housing 2. The exterior housing 2 shown in FIG. 4 houses the image projection device 3, but is not limited to this. A part of the image projection device 3 may be provided outside the exterior housing 2. The exterior housing 2 houses at least a part of the image projection device 3.

[0029] The image projection device 3 generates image light according to image data input from the control device 5. The image projection device 3 projects the image light onto a projection surface SC. The image projection device 3 projects a projection image PG onto the projection surface SC by projecting the image light onto the projection surface SC. The image projection device 3 includes a light source device 31, an image generation device 33, and a projection optical device 35. The image projection device 3 corresponds to an example of an optical device.

[0030] The light source device 31 emits light to the image generating device 33. Details of the light source device 31 will be described later. Fig. 4 shows the exterior of the light source device 31. On the exterior of the light source device 31, a first light source housing 311 and a heat dissipation member 3125 are provided.

[0031] The first light source housing 311 covers each part that configures the light source device 31. The first light source housing 311 prevents dust from entering the inside of the light source device 31. The first light source housing 311 is configured in a substantially rectangular parallelepiped shape in which the dimension along the X axis is larger than the dimension along the Y axis.

[0032] The heat dissipation member 3125 is configured to be capable of thermal transfer with the inside of the light source device 31. The heat dissipation member 3125 dissipates heat generated inside the light source device 31. The heat dissipation member 3125 is a heat sink having a plurality of fins. The heat dissipation member 3125 cools the inside of the light source device 31.

[0033] The image generating device 33 generates image light using light emitted from the light source device 31. The image generating device 33 modulates the light incident from the light source device 31 to generate image light. A detailed configuration of the image generating device 33 will be described later. The image generating device 33 shown in FIG. 4 has a second light source housing 331, a plurality of light modulation devices 335, and a color combining element 336. The plurality of light modulation devices 335 and the color combining element 336 are covered by the second light source housing 331. FIG. 4 shows the plurality of light modulation devices 335 and the color combining element 336 so that they can be seen.

[0034] The second light source housing 331 covers various devices constituting the image generating device 33. The second light source housing 331 covers various devices including the light modulation device 335 and the color combining element 336. The second light source housing 331 prevents dust from entering the inside of the image generating device 33.

[0035] The light modulation device 335 modulates the incident light in accordance with image data. The light modulation device 335 includes a blue light modulation element 335B, a green light modulation element 335G, and a red light modulation element 335R.

[0036] The color combining element 336 generates image light by combining the light modulated by the light modulation device 335. The image light generated by the color combining element 336 is output to the projection optical device 35. The color combining element 336 is, for example, configured with a cross dichroic prism. The color combining element 336 is not limited to a cross dichroic prism. The color combining element 336 may be configured with a plurality of dichroic mirrors.

[0037] The projection optical device 35 projects the image light onto the projection surface SC. The projection optical device 35 projects the image light onto the projection surface SC, thereby displaying a projection image PG on the projection surface SC. The projection optical device 35 shown in FIG. 4 includes a lens housing 351.

[0038] Lens housing 351 houses a plurality of lenses, etc. Lens housing 351 covers the plurality of lenses, etc., thereby preventing dust from adhering to the lenses, etc. Lens housing 351 includes an entrance portion 3511, a bending portion 3512, an exit portion 3513, and an opening 3514.

[0039] The incident portion 3511 receives the image light generated by the color synthesis element 336. The incident portion 3511 is a member extending along the Y axis. An end of the incident portion 3511 in the −Y direction is connected to the image generation device 33.

[0040] The bending portion 3512 is a member that connects the incident portion 3511 and the exit portion 3513. The bending portion 3512 bends the traveling direction of the image light passing through the incident portion 3511 to the −X direction. The bending portion 3512 outputs the image light to the exit portion 3513.

[0041] The exit portion 3513 is connected to the bent portion 3512. The exit portion 3513 is a member extending in the -X direction from the bent portion 3512. An opening 3514 is provided at a position of the exit portion 3513 in the +Z direction.

[0042] The opening 3514 is provided in the emission portion 3513. The opening 3514 is an opening through which the image light that has passed through the inside of the lens housing 351 is emitted to the outside.

[0043] The cooling device 4 cools objects to be cooled that constitute the projector 1. The objects to be cooled are various parts and devices that constitute the image projection device 3. The cooling device 4 takes in outside air from a right side opening 261 as cooling gas and cools the objects to be cooled using the cooling gas. The cooling device 4 cools the objects to be cooled by sending the cooling gas to the objects to be cooled. The cooling device 4 includes a filter 41, a duct 42, a first fan 43, a second fan 44, a third fan 45, a fourth fan 46, and a fifth fan 47.

[0044] The filter 41 is disposed in the right side opening 261. The filter 41 is provided so as to be attachable to and detachable from the right side opening 261. The filter 41 removes dust contained in the outside air taken in through the right side opening 261.

[0045] The duct 42 is a housing that guides a portion of the cooling gas taken in from the right side opening 261. One end of the duct 42 is connected to the filter 41 provided in the right side opening 261. The duct 42 extends along the Y axis. The other end of the duct 42 is disposed in a position in the -Y direction from the center of the exterior housing 2. The duct 42 is disposed in a position in the -Z direction from the control device 5, the power supply device 6, and the projection optical device 35.

[0046] The first fan 43 sends out cooling gas to the control device 5 and the power supply device 6. The first fan 43 is disposed in a position adjacent to the right side opening 261. The first fan 43 sucks in a portion of the cooling gas that has passed through the filter 41. The first fan 43 cools the control device 5 and the power supply device 6 by sending the sucked in cooling gas to the control device 5 and the power supply device 6.

[0047] The second fan 44 is disposed in the +X direction at approximately the center inside the exterior housing 2. The second fan 44 blows out the cooling gas that has cooled the control device 5 and the power supply device 6 in the -Y direction. The second fan 44 blows out the cooling gas toward the left side opening 251.

[0048] The third fan 45 is disposed in a space surrounded by the light source device 31, the image generating device 33, and the projection optical device 35. The third fan 45 is disposed at a position in the -X direction of the image generating device 33. The third fan 45 sucks in the cooling gas that has flowed through the duct 42. The third fan 45 sends the cooling gas to the image generating device 33. The third fan 45 cools the light modulation device 335 by sending the cooling gas to the image generating device 33.

[0049] The fourth fan 46 is disposed in a space surrounded by the light source device 31, the image generating device 33, and the projection optical device 35. The fourth fan 46 is disposed at a position on the -X direction side of the image generating device 33. The fourth fan 46 sucks in the cooling gas that has circulated through the duct 42. The fourth fan 46 cools the heat dissipation member 3125 by sending the cooling gas to the heat dissipation member 3125 of the light source device 31.

[0050] The fifth fan 47 exhausts to the outside the cooling gas circulating inside the exterior housing 2. The fifth fan 47 is disposed at a position adjacent to the left side opening 251. The fifth fan 47 exhausts the cooling gas to the outside of the exterior housing 2 by sending the cooling gas toward the left side opening 251.

[0051] The control device 5 is a controller that controls the operation of the projector 1. The control device 5 is a circuit board on which an arithmetic processing circuit such as a CPU (Central Processing Unit) is provided. The control device 5 is composed of one or more circuit boards. The control device 5 is provided at a position in the +Y direction with respect to the projection optical device 35. The control device 5 corresponds to an example of a processing device.

[0052] The power supply device 6 supplies power to each device constituting the projector 1. The power supply device 6 transforms power supplied from an external source and supplies the transformed power to each device. The power supply device 6 is provided in a position in the +Y direction with respect to the projection optical device 35.

[0053] Fig. 5 shows a schematic configuration of the image projection device 3. Fig. 5 shows the internal configuration of the image projection device 3 as viewed from the +Z direction. Fig. 5 shows the internal configurations of the light source device 31, the image generation device 33, and the projection optical device 35.

[0054] The light source device 31 emits white light WL to the image generating device 33. The light source device 31 accommodates a light source 312, an afocal optical element 313, a first phase difference element 314, a diffuse transmission element 315, a light combining element 316, a first condensing element 317, a wavelength conversion device 318, a second phase difference element 319, a second condensing element 320, a diffusing optical element 321, and a third phase difference element 322 inside a first light source housing 311. The light source 312, the afocal optical element 313, the first phase difference element 314, the diffuse transmission element 315, the light combining element 316, the second phase difference element 319, the second condensing element 320, and the diffusing optical element 321 are disposed on a first illumination optical axis Ax1. The wavelength converter 318, the first light collecting element 317, the light combining element 316, and the third phase difference element 322 are disposed on a second illumination optical axis Ax2. The second illumination optical axis Ax2 is perpendicular to the first illumination optical axis Ax1.

[0055] The first light source housing 311 has an exit 3111 that emits the white light WL toward the image generation device 33. The exit 3111 is provided at a position connected to the image generation device 33. The exit 3111 emits the white light WL along the second illumination optical axis Ax2.

[0056] The light source 312 emits light along a first illumination optical axis Ax1. The light source 312 emits light in the +X direction. The light source 312 includes a support member 3121, a plurality of solid-state light-emitting elements 3122, a plurality of collimator lenses 3123, and a heat receiving member 3124.

[0057] The support member 3121 has an orthogonal plane perpendicular to the first illumination optical axis Ax1. The support member 3121 supports a plurality of solid-state light-emitting elements 3122 arranged on the orthogonal plane. The support member 3121 is made of a metal member. The support member 3121 transfers heat generated by the solid-state light-emitting elements 3122 to the heat-receiving member 3124.

[0058] The plurality of solid-state light-emitting elements 3122 emit s-polarized blue light. The solid-state light-emitting elements 3122 are, for example, configured with a semiconductor laser. The s-polarized blue light emitted by the solid-state light-emitting elements 3122 is laser light with a peak wavelength of 440 nm. Each of the plurality of solid-state light-emitting elements 3122 emits s-polarized blue light in the +X direction. The plurality of solid-state light-emitting elements 3122 emit s-polarized blue light, but are not limited thereto. The plurality of solid-state light-emitting elements 3122 may emit s-polarized blue light and p-polarized blue light.

[0059] Each of the multiple collimator lenses 3123 is provided corresponding to the solid-state light-emitting element 3122. The collimator lens 3123 converts the s-polarized blue light emitted from the solid-state light-emitting element 3122 into a parallel beam. The collimator lens 3123 causes the parallel beam to enter the afocal optical element 313.

[0060] The heat receiving member 3124 is provided at a position on the -X direction of the support member 3121. The heat receiving member 3124 is connected to the support member 3121 in a manner capable of heat transfer. The heat receiving member 3124 receives heat generated by the solid-state light emitting element 3122 via the support member 3121. The heat receiving member 3124 is connected to a heat pipe (not shown) in a manner capable of heat transfer. The heat pipe is connected to the heat dissipation member 3125 in a manner capable of heat transfer. The heat receiving member 3124 transfers heat to the heat dissipation member 3125 via the heat pipe. The heat dissipation member 3125 dissipates the transferred heat. The heat dissipation member 3125 cools the solid-state light emitting element 3122 via the support member 3121 and the heat receiving member 3124 by dissipating heat.

[0061] The afocal optical element 313 reduces the diameter of the light beam incident from the light source 312. The afocal optical element 313 is composed of a first lens 3131 and a second lens 3132. The first lens 3131 collects the light beam incident from the light source 312. The second lens 3132 collimates the light beam collected by the first lens 3131. The light source device 31 shown in FIG. 5 includes the afocal optical element 313, but is not limited to this. The light source device 31 does not necessarily have to include the afocal optical element 313.

[0062] First phase difference element 314 is provided between first lens 3131 and second lens 3132. First phase difference element 314 converts one type of linearly polarized light incident from first lens 3131 into a light beam including s-polarized blue light and p-polarized blue light. First phase difference element 314 may be rotated about a rotation axis along first illumination optical axis Ax1 by a rotation device (not shown). By rotating first phase difference element 314, the ratio of s-polarized blue light and p-polarized blue light in the light beam output from first phase difference element 314 is adjusted.

[0063] The diffuse transmission element 315 homogenizes the illuminance distribution of the light beam incident from the second lens 3132. The diffuse transmission element 315 has a hologram, a plurality of small lenses arranged on a plane perpendicular to the optical axis, or a rough surface through which the light beam passes. The light source device 31 shown in FIG. 5 includes the diffuse transmission element 315, but is not limited to this. The light source device 31 may include a homogenizer having a pair of multi-lenses instead of the diffuse transmission element 315.

[0064] The light combining element 316 separates the s-polarized component and the p-polarized component contained in the incident light beam. The light combining element 316 is, for example, a polarizing beam splitter. The light combining element 316 reflects the s-polarized component and transmits the p-polarized component. The light combining element 316 has a color separation characteristic that transmits light of a predetermined wavelength or more in the s-polarized component and the p-polarized component. The light combining element 316 reflects the s-polarized blue light of the light beam incident from the diffuse transmission element 315 and transmits the p-polarized blue light. The s-polarized blue light is reflected by the light combining element 316 and enters the first light collecting element 317. The p-polarized blue light is transmitted through the light combining element 316 and enters the second phase difference element 319.

[0065] The light combining element 316 may have a half mirror function and a dichroic mirror function. The half mirror function is a function of passing some light components of the light beam incident from the diffuse transmission element 315 and reflecting other light components. The dichroic mirror function is a function of reflecting the light incident from the diffusion optical element 321 and passing the light incident from the wavelength conversion device 318. When the light combining element 316 has a half mirror function and a dichroic mirror function, the light source device 31 does not need to include the first phase difference element 314 and the second phase difference element 319.

[0066] The first light collecting element 317 collects the s-polarized light component reflected by the light combining element 316 onto the wavelength conversion device 318. The first light collecting element 317 collimates the light incident from the wavelength conversion device 318. The first light collecting element 317 shown in Fig. 5 is composed of three lenses, but is not limited to this. The number of lenses constituting the first light collecting element 317 is not limited.

[0067] The wavelength converter 318 converts the wavelength of the incident light. The wavelength converter 318 emits fluorescence excited by the incident light. The wavelength converter 318 has a wavelength conversion element 3181 and a rotation device 3182.

[0068] The wavelength conversion element 3181 is, for example, a phosphor wheel having a substrate and a phosphor layer. The phosphor layer is provided on the light incident surface of the substrate. The phosphor layer contains phosphor particles. The phosphor particles are excited by the incidence of light that is excitation light. The phosphor particles emit fluorescence having a wavelength longer than the wavelength of the incident s-polarized blue light. For example, the fluorescence is light with a peak wavelength of 500 to 700 nm, and includes green light and red light. The light emission optical axis of the wavelength conversion element 3181 is perpendicular to the light emission optical axis of the solid-state light emitting element 3122. The light emission optical axis of the wavelength conversion element 3181 coincides with the second illumination optical axis Ax2, which is the light emission optical axis of the light source device 31.

[0069] The rotation device 3182 rotates the wavelength conversion element 3181 around a rotation axis. The rotation axis of the rotation device 3182 is an axis along the second illumination optical axis Ax2. The rotation device 3182 is, for example, configured by a motor.

[0070] The wavelength converter 318 emits the fluorescence in the +Y direction along the second illumination optical axis Ax2. The fluorescence emitted from the wavelength converter 318 passes through the first light collecting element 317 and the light combining element 316 along the second illumination optical axis Ax2, and is incident on the third phase difference element 322.

[0071] The second phase difference element 319 is disposed between the light combining element 316 and the second light collecting element 320. The second phase difference element 319 converts the p-polarized blue light transmitted through the light combining element 316 into circularly polarized blue light.

[0072] Second light collecting element 320 collects the circularly polarized blue light incident from second phase difference element 319 onto diffusing optical element 321. Second light collecting element 320 collimates the circularly polarized blue light incident from diffusing optical element 321. The number of lenses constituting second light collecting element 320 can be set appropriately.

[0073] The diffusing optical element 321 reflects the incident circularly polarized blue light in the -X direction at a diffusion angle similar to that of the fluorescence emitted from the wavelength conversion device 318. The diffusing optical element 321 is a reflecting member that performs lump-reflection of the incident circularly polarized blue light. The light output optical axis of the diffusing optical element 321 coincides with the first illumination optical axis Ax1 and is perpendicular to the second illumination optical axis Ax2. The diffusing optical element 321 is disposed at a position in the +X direction with respect to the second illumination optical axis Ax2. The light source device 31 may include a second rotating device that rotates the diffusing optical element 321 around a rotation axis parallel to the first illumination optical axis Ax1.

[0074] The circularly polarized blue light reflected by the diffusing optical element 321 passes through the second light collecting element 320 and then enters the second phase difference element 319. When the circularly polarized blue light is reflected by the diffusing optical element 321, it is converted into circularly polarized blue light having the opposite rotation direction. The circularly polarized blue light that enters the second phase difference element 319 via the second light collecting element 320 is converted into s-polarized blue light by the second phase difference element. The s-polarized blue light that enters the light combining element 316 from the second phase difference element 319 is reflected by the light combining element 316 and enters the third phase difference element 322. The light that enters the third phase difference element 322 from the light combining element 316 is white light WL in which s-polarized blue light and fluorescent light are mixed.

[0075] The third phase difference element 322 converts the white light WL incident from the light combining element 316 into light having a mixture of s-polarized components and p-polarized components. The white light WL whose polarization state has been converted by the third phase difference element 322 is emitted from the light source device 31 in the +Y direction along the second illumination optical axis Ax2 and enters the image generating device 33.

[0076] The image generating device 33 accommodates a uniforming device 332, a color separating device 333, a relay device 334, a light modulating device 335, and a color combining element 336 in a second light source housing 331. The uniforming device 332, the color separating device 333, and the relay device 334 are held in the second light source housing 331.

[0077] The homogenizer 332 homogenizes the illuminance of the white light WL incident from the light source device 31. The homogenizer 332 aligns the polarization state of the white light WL. The homogenizer 332 is composed of, for example, a pair of lens arrays, a polarization conversion element, and a superimposing lens. The pair of lens arrays homogenize the illuminance of the white light WL. The polarization conversion element aligns the polarization state of the white light WL. The superimposing lens superimposes a plurality of partial light beams split by the pair of lens arrays on the modulation area. The pair of lens arrays, the polarization conversion element, and the superimposing lens are not shown. The white light WL that has passed through the homogenizer 332 is, for example, linearly polarized s-polarized light. The white light WL that has passed through the homogenizer 332 passes through a color separator 333 and a relay device 334 and illuminates the modulation area of ​​the light modulator 335.

[0078] The color separation device 333 separates the white light WL incident from the uniformizer 332 into blue light BL, green light GL, and red light RL. The color separation device 333 includes a first color separation element 3331, a first reflecting element 3332, and a second color separation element3333.

[0079] The first color separation element 3331 is disposed at a position in the +Y direction of the uniformizer 332. The first color separation element 3331 passes blue light BL contained in the white light WL in the +Y direction. The first color separation element 3331 reflects yellow light YL contained in the white light WL in the +X direction. The first color separation element 3331 separates the white light WL into blue light BL and yellow light YL.

[0080] The first reflecting element 3332 reflects the blue light BL that has passed through the first color separation element 3331 in the +X direction. The blue light BL reflected by the first reflecting element 3332 is incident on the blue light modulation element 335B. The optical axis of the blue light BL between the first color separation element 3331 and the first reflecting element 3332 coincides with the second illumination optical axis Ax2.

[0081] The second color separation element 3333 is disposed at a position in the +X direction of the first color separation element 3331. The second color separation element 3333 reflects the green light GL contained in the yellow light YL reflected by the first color separation element 3331 in the +Y direction. The second color separation element 3333 passes the red light RL contained in the yellow light YL in the +X direction. The second color separation element 3333 separates the yellow light YL into green light GL and red light RL. The green light GL separated by the second color separation element 3333 enters the green light modulation element 335G. The red light RL separated by the second color separation element 3333 enters the relay device 334.

[0082] The relay device 334 is provided in the optical path of the red light RL, which is longer than the optical paths of the blue light BL and the green light GL. The relay device 334 suppresses loss of the red light RL. The relay device 334 has a second reflecting element 3341, a third reflecting element 3342, an incident side lens 3343, a relay lens 3344, and an exit side lens 3345.

[0083] Second reflecting element 3341 is disposed at a position on the +X direction side of second color separation element 3333. Second reflecting element 3341 reflects red light RL that has passed through second color separation element 3333 in the +Y direction.

[0084] The third reflecting element 3342 is disposed at a position in the +Y direction of the second reflecting element 3341. The third reflecting element 3342 reflects the red light RL reflected by the second reflecting element 3341 in the -X direction.

[0085] The incident side lens 3343 is disposed between the second color separation element 3333 and the second reflecting element 3341. The incident side lens 3343 collimates the red light RL that has passed through the second color separation element 3333. The incident side lens 3343 guides the red light RL to the second reflecting element 3341.

[0086] The relay lens 3344 is disposed between the second reflecting element 3341 and the third reflecting element 3342. The relay lens 3344 collects the red light RL reflected by the second reflecting element 3341. The relay lens 3344 makes the red light RL incident on the third reflecting element 3342.

[0087] The exit lens 3345 is disposed between the third reflecting element 3342 and the red light modulation element 335R. The exit lens 3345 causes the red light RL reflected by the third reflecting element 3342 to enter the red light modulation element 335R.

[0088] 5 includes a relay device 334 in the optical path of the red light RL, but is not limited to this. When the optical path of the blue light BL is configured to be longer than the optical paths of the green light GL and the red light RL, for example, the relay device 334 is provided on the optical path of the blue light BL.

[0089] The light modulation device 335 has a blue light modulation element 335B, a green light modulation element 335G, and a red light modulation element 335R. The blue light modulation element 335B, the green light modulation element 335G, and the red light modulation element 335R each have a transmissive liquid crystal panel and a pair of polarizing plates that sandwich the transmissive liquid crystal panel. The transmissive liquid crystal panel and the pair of polarizing plates are not shown.

[0090] The blue light modulation element 335B modulates the blue light BL incident in the +X direction from the first reflecting element 3332. The blue light BL modulated by the blue light modulation element 335B is incident on the color combining element 336 arranged at a position in the +X direction of the blue light modulation element 335B.

[0091] Green light modulation element 335G modulates green light GL incident in the +Y direction from second color separation element 3333. Green light GL modulated by green light modulation element 335G is incident on color combining element 336, which is disposed at a position in the +Y direction of green light modulation element 335G.

[0092] Red light modulation element 335R modulates red light RL incident in the -X direction from output side lens 3345. Red light RL modulated by red light modulation element 335R is incident on color combining element 336 disposed at a position in the -X direction of red light modulation element 335R.

[0093] The color combining element 336 generates image light by combining the blue light BL, the green light GL, and the red light RL. The color combining element 336 reflects the blue light BL incident in the +X direction from the blue light modulation element 335B in the +Y direction. The color combining element 336 transmits the green light GL incident in the +Y direction from the green light modulation element 335G in the +Y direction. The color combining element 336 reflects the red light RL incident in the -X direction from the red light modulation element 335R in the +Y direction. The image light combined by the color combining element 336 is emitted in the +Y direction along the light emission optical axis of the image generating device 33. The image light is incident on the projection optical device 35. The optical axis of the green light GL reflected by the second color separation element 3333 coincides with the light emission optical axis of the color combining element 336. The light emission optical axis of the color combining element 336 coincides with the light incidence optical axis of the projection optical device 35.

[0094] The projection optical device 35 has a lens housing 351. The lens housing 351 includes an incident portion 3511, a bending portion 3512, an exit portion 3513, and an opening 3514. The incident portion 3511 constitutes an incident optical path 352. A bending member 353 is provided in the bending portion 3512. The exit portion 3513 constitutes a passing optical path 354. The exit portion 3513 is provided with an optical path changing member 355.

[0095] The incident optical path 352 is an optical path on which image light is incident. The image light is incident in the +Y direction from the image generating device 33. The light incident optical axis of the projection optical device 35 is the optical axis of the incident optical path 352 along the Y axis. The light incident optical axis of the projection optical device 35 is parallel to the second illumination optical axis Ax2 of the light source device 31. A plurality of incident optical path lenses 3521 are provided on the incident optical path 352. The plurality of incident optical path lenses 3521 are supported by an incident portion 3511.

[0096] Bending member 353 bends the traveling direction of image light passing through incident light path 352. Bending member 353 bends the traveling direction of image light by reflecting image light incident in the +Y direction to the -X direction. Bending member 353 is, as one example, formed of a reflecting mirror.

[0097] Passing light path 354 is an optical path through which image light whose traveling direction has been bent by bending member 353 passes. Passing light path 354 is provided inside emission unit 3513 along the X-axis. The image light travels through passing light path 354 in the -X direction. Passing light path 354 has a plurality of passing light path lenses 3541. Passing light path lenses 3541 are supported by emission unit 3513.

[0098] The light path changing member 355 is provided at a position in the -X direction of the passing light path 354. The light path changing member 355 reflects the image light. The light path changing member 355 changes the traveling direction of the image light traveling in the -X direction on the passing light path 354 to the +X direction and the +Z direction. The light path changing member 355 is composed of an aspheric mirror, for example. The image light reflected by the light path changing member 355 passes through the opening 3514 shown in FIG. 4. The image light that passes through the opening 3514 travels in the +X direction. When the image light travels in the +X direction, it is diffused along the Y axis and the Z axis. By providing the light path changing member 355, it becomes possible to project a large-screen projection image PG onto the projection surface SC when the distance between the projector 1 and the projection surface SC is short.

[0099] Fig. 6 shows a block configuration of the projector 1. Fig. 6 shows the projector 1 and a remote control 90. The projector 1 and the remote control 90 communicate with each other via infrared communication or Bluetooth communication.

[0100] The projector 1 includes an image projection device 3, a control device 5, a memory 7, a communication interface 8, and a receiving unit 9. Fig. 6 shows the projector 1 with the cooling device 4 and power supply device 6 omitted.

[0101] The image projection device 3 projects a projection image PG onto the projection surface SC under the control of the control device 5. The image projection device 3 projects the projection image PG based on image data transmitted from the image providing device 500. The image projection device 3 projects an OSD image 100 onto the projection surface SC. OSD stands for on-screen display. The OSD image 100 is displayed within the projection image PG. The OSD image 100 displays settings and operation information of the projector 1. Details of the OSD image 100 will be described later.

[0102] The control device 5 executes a control program CP to function as various functional units. The control program CP is stored in the memory 7. The control device 5 executes the control program CP to function as an OSD control unit 51, a data processing unit 53, and an image control unit 55.

[0103] The OSD control unit 51 is a functional unit that displays various OSD images 100 within the projection image PG. The OSD control unit 51 displays various OSD images 100 based on OSD data 71. The OSD data 71 is stored in the memory 7. The OSD images 100 include an adjustment image 101. The adjustment image 101 corresponds to an example of a first image. The OSD image 100 may include any of various messages, an image indicating an operation, an input data image, and the like.

[0104] The data processing unit 53 is a functional unit that calculates size data corresponding to the length of the projection image PG projected on the projection surface SC. The data processing unit 53 calculates the size data based on input data input by the user. The size data is calculated by the data processing unit 53. As an example, the size data is the diagonal length Y of the projection image PG projected on the projection surface SC. The size data may be either the image height PH or the image width PW. The image height PH is the length of the side along the Z axis of the projection image PG projected on the projection surface SC. The image width PH is the length of the side along the Y axis of the projection image PG projected on the projection surface SC. When the size data is either the image height PH or the image width PW, the size of the projection image PG projected on the projection surface SC is calculated by either the image height PH or the image width PW and the aspect ratio. The size data, which is the length of the projection image PG projected on the projection surface SC, corresponds to an example of a third value.

[0105] The data processing unit 53 outputs information indicating the size data. The information indicating the size data is the diagonal length Y of the projection image PG projected on the projection surface SC, or data obtained by converting the diagonal length Y. The information indicating the size data may be the image height PH and image width PW of the projection image PG projected on the projection surface SC. The information indicating the size data may be data obtained by converting the image height PH and image width PW. The information indicating the size data corresponds to an example of information indicating a third value. The data processing unit 53 outputs the information indicating the size data to an external device via the communication interface 8. The data processing unit 53 may output the information indicating the size data to the OSD control unit 51. The OSD control unit 51 inputs the information indicating the size data. The OSD control unit 51 displays the size data and the like in the projection image PG based on the information indicating the size data. The data processing unit 53 may output the information indicating the size data to the memory 7. The memory 7 stores the information indicating the size data.

[0106] The image control unit 55 is a functional unit that performs image processing on the image data transmitted from the image providing device 500. The image control unit 55 corrects the image data using various setting values. The various setting values ​​are stored in the memory 7. The setting values ​​include correction values ​​related to aspect ratio, contrast, brightness, and geometric distortion correction. The image control unit 55 may perform image processing to display an OSD image 100 superimposed on an image based on the image data.

[0107] The memory 7 stores various data. The memory 7 is composed of semiconductor elements such as a RAM (Random Access Memory) and a ROM (Read Only Memory). The memory 7 stores a control program CP and OSD data 71. The memory 7 stores various setting values ​​used by the image control unit 55, information indicating size data calculated by the data processing unit 53, and the like.

[0108] The control program CP is firmware that causes the control device 5 to function as various functional units. The control program CP causes the control device 5 to operate as an OSD control unit 51, a data processing unit 53, and an image control unit 55. The control program CP may cause the control device 5 to operate as a functional unit other than the OSD control unit 51, the data processing unit 53, and the image control unit 55. The control program CP corresponds to an example of a program.

[0109] The OSD data 71 is various data related to the OSD image 100 displayed in the projection image PG. The OSD data 71 includes a reference value used when calculating the length of the projection image PG projected on the projection surface SC. The reference value is data related to the size of the projection image PG projected on the projection surface SC. The size of the projection image PG projected on the projection surface SC is the length of the diagonal line, the height, and the width. The size of the projection image PG projected on the projection surface SC corresponds to an example of the second length. The reference value is data related to the length of the adjustment image 101 on the projection surface SC. The adjustment image 101 is included in the OSD image 100. The adjustment image 101 will be described later. The reference value corresponds to an example of the first value. The data processing unit 53 calculates the size data using the reference value. A method of calculating the size data will be described later. The reference value is the width of the exterior housing 2 of the projector 1, the width of the remote control 90, etc. The reference value may be an approximate value such as the size of a person's face or the size of an animal. The OSD data 71 includes the aspect ratio of the projection image PG projected onto the projection surface SC, various messages, various operation images, various adjustment image data, and the like.

[0110] The communication interface 8 is an interface circuit that is communicatively connected to the image providing device 500. The communication interface 8 is connected to the image providing device 500 by wire or wirelessly according to a predetermined communication protocol. The communication interface 8 includes a wired connector and a wireless communication port. The wired connector is a High-Definition Multimedia Interface (HDMI) connector, a Universal Serial Bus (USB) connector, a Local Area Network (LAN) connector, or the like. The wireless communication port is a Wi-Fi communication port, a Bluetooth communication port, or the like. HDMI, Wi-Fi, and Bluetooth are registered trademarks. The communication interface 8 receives image data from the image providing device 500. The communication interface 8 transmits various setting data and the like of the projector 1 to the image providing device 500 in response to the control of the control device 5. The communication interface 8 may transmit information indicating size data to the image providing device 500. The communication interface 8 may be communicatively connected to an external device different from the image providing device 500. The communication interface 8 transmits various setting data and information indicating size data and the like to the external device. The communication interface 8 outputs information indicating the size data to the image providing device 500 or an external device.

[0111] The receiving unit 9 receives an operation signal from a remote control 90. The receiving unit 9 receives the operation signal by infrared communication or Bluetooth communication. The receiving unit 9 includes an antenna and a receiving circuit for receiving the operation signal. The operation signal includes a power operation signal for controlling the power supply of the projector 1, an instruction signal related to the OSD image 100, an adjustment signal, etc. The adjustment signal is a signal for instructing a change in the size of the adjusted image 101. The receiving unit 9 transmits the operation signal to the control device 5. The control device 5 receives the operation signal as input data and performs various controls based on the operation signal.

[0112] The remote control 90 transmits an operation signal to the receiving unit 9. When a user operates any of a plurality of operation buttons 91 provided on the remote control 90, the remote control 90 transmits an operation signal to the receiving unit 9. The remote control 90 transmits an operation signal corresponding to each of the plurality of operation buttons 91 to the receiving unit 9.

[0113] The projector 1 may have an operation panel (not shown). The operation panel is provided on the exterior housing 2. The operation panel has input buttons or a touch panel (not shown). The operation panel accepts operations by the user in the same manner as the remote control 90. The operation panel transmits an operation signal based on the user's operation to the control device 5. The operation panel functions as an input device.

[0114] FIG. 7 shows an example of a projection image PG including an OSD image 100. FIG. 7 shows a projection image PG projected onto a projection surface SC. The projection image PG is projected by a projector 1 disposed at a position in the -Z direction of the projection surface SC. The projection image PG including the OSD image 100 is projected onto the projection surface SC using an image projection device 3 of the projector 1. The projector 1 is disposed below the projection surface SC. The projection image PG shown in FIG. 7 includes a first OSD image 100a, which is an example of the OSD image 100. The aspect ratio of the projection image PG shown in FIG. 7 is a:b. The first OSD image 100a shown in FIG. 7 includes a first adjustment image 101a and a first message image 103a. The first adjustment image 101a is an example of the adjustment image 101. The first message image 103a is an example of the message image 103. FIG. 7 shows a virtual horizontal line VH.

[0115] The first adjustment image 101a is an image that allows the user to adjust the adjusted image width AW. The first adjustment image 101a is composed of two reference lines along the Z axis. The width along the Y axis between the two reference lines corresponds to the adjusted image width AW. The first adjustment image 101a is displayed in the second region R2 of the projected image PG. When the projected image PG is horizontally divided into two equal parts, the first adjustment image 101a is disposed in the region closer to the projector 1.

[0116] The first message image 103a is an image that displays information to notify the user. The first message image 103a is a message that prompts the user to adjust the adjusted image width AW. The first message image 103a represents the first adjusted image 101a as a reference line. The first message image 103a is a message that prompts the user to match the adjusted image width AW with the exterior width 2W of the projector 1. The message image 103 corresponds to an example of the second image. The text of the first message image 103a is set appropriately.

[0117] The user adjusts the adjusted image width AW of the first adjusted image 101a using the remote control 90. When the user operates the enlarge button or the reduce button among the operation buttons 91 of the remote control 90, an adjustment signal is transmitted from the remote control 90 to the receiving unit 9. The enlarge button and the reduce button are not shown. The enlarge button is a button that instructs enlarging the adjusted image width AW of the first adjusted image 101a. The reduce button is a button that instructs reducing the adjusted image width AW of the first adjusted image 101a. The adjustment operation by the user using the enlarge button or the reduce button corresponds to an example of a first operation. The user adjusts the amount of change in the adjusted image width AW by adjusting the amount of operation of the enlarge button or the reduce button. The amount of operation is adjusted by the pressing time and the number of times the operation button 91 is pressed. The amount of operation is included in the adjustment signal.

[0118] The receiving unit 9 receives the adjustment signal. The receiving unit 9 corresponds to an example of an input device. Receiving the adjustment signal corresponds to an example of accepting a first operation. The receiving unit 9 transmits the adjustment signal to the OSD control unit 51 and the data processing unit 53. The OSD control unit 51 changes the ratio data in response to the adjustment signal. The ratio data will be described later. The OSD control unit 51 enlarges or reduces the adjusted image width AW by changing the ratio data. The adjusted image width AW corresponds to an example of a second length.

[0119] FIG. 8 shows an example of a projection image PG including an OSD image 100. FIG. 8 shows a projection image PG projected on a projection surface SC. The projection image PG is projected by a projector 1 disposed at a position in the -Z direction of the projection surface SC. The projector 1 is disposed below the projection surface SC. FIG. 8 shows a state when a user makes the adjusted image width AW of the first adjusted image 101a coincident with or approximately coincident with the exterior width 2W of the projector 1. The exterior width 2W of the projector 1 coincides with the width along the Y axis of the exterior housing 2. When a user operates the enlargement button or reduction button of the remote control 90, the remote control 90 transmits an adjustment signal to the receiving unit 9. The receiving unit 9 receives the adjustment signal. The OSD control unit 51 adjusts the adjusted image width AW based on a reference value and the adjustment signal.

[0120] As shown in FIG. 8, when the adjusted image width AW matches or nearly matches the exterior width 2W of the projector 1, the user operates the decision button in the operation buttons 91. When the user operates the decision button, a decision signal corresponding to the decision button is transmitted from the remote control 90 to the receiving unit 9. The receiving unit 9 receives the decision signal. The receiving unit 9 transmits the decision signal to the OSD control unit 51. When the OSD control unit 51 receives the decision signal, it determines that the adjusted image width AW has been adjusted to the adjustment value by the user. When the OSD control unit 51 determines that the adjusted image width AW is the adjustment value, it transmits the changed ratio data to the data processing unit 53. The adjustment value corresponds to an example of the second value. When the adjustment value is a value that matches or nearly matches the exterior width 2W, the adjustment value becomes a designated value that is assumed in advance. The exterior width 2W corresponds to an example of the case length.

[0121] The data processing unit 53 receives the ratio data when the determination signal is transmitted. The data processing unit 53 calculates size data based on the reference value and the ratio data. The data processing unit 53 reads out the reference value from the memory 7 in advance.

[0122] The ratio data is the ratio of the size of the adjusted image 101 projected on the projection surface SC to the size of the projection image PG projected on the projection surface SC. As an example, the ratio data is the width ratio of the adjusted image width AW of the first adjusted image 101a to the image width PW of the projection image PG. The ratio data may be the height ratio of the adjusted image height of the first adjusted image 101a to the image height PH of the projection image PG. When the user transmits an adjustment signal, the OSD control unit 51 changes the ratio data in response to the adjustment signal. As an example, the data processing unit 53 calculates the diagonal length Y, which is an example of size data, using the following formula (1).

[0123]

number

[0124] Here, c is ratio data. When the adjusted image 101 is the first adjusted image 101a, a width ratio is used as the ratio data. X is a reference value. The reference value is the actual value of the exterior width 2W of the projector 1. The actual value of the exterior width 2W is stored in advance in the memory 7 as a reference value. a and b are values ​​representing the aspect ratio.

[0125] When the data processing unit 53 receives the determination signal, it can calculate the diagonal length Y by substituting the ratio data into formula (1). The data processing unit 53 outputs the diagonal length Y or a value obtained by converting the diagonal length Y as information indicating size data to the OSD control unit 51, the image providing device 500, etc. The data processing unit 53 outputs the information indicating the size data based on the reference value and an adjustment signal including the amount of operation.

[0126] The standard value of the ratio data is set to a value that makes the length of the projected image PG a specified length. When the adjusted image width AW is a specified value that matches the exterior width 2W, the standard value of the ratio data is set to a value that makes the diagonal length Y 100 inches, for example. The standard value of the ratio data is the specified value divided by 100 inches. The standard value of the ratio data is set appropriately.

[0127] The data processing unit 53 may use the dimensions of a known comparison object, such as the width of the remote control 90, the width of a member constituting a part of the projector 1, or the size of a person's face, as the reference value. At this time, the user makes the adjusted image width AW match or approximately match the dimensions of the comparison object. When the OSD control unit 51 receives the determination signal, it determines that the adjusted image width AW has been adjusted to the adjustment value. The OSD control unit 51 transmits ratio data when the adjusted image width AW has been adjusted to the adjustment value to the data processing unit 53. The data processing unit 53 calculates size data using the ratio data.

[0128] The data processing unit 53 may calculate the image width PW as the size data instead of the diagonal length Y. The image width PW is calculated by multiplying the ratio data when it is determined that the adjusted image width AW has been adjusted to the adjustment value by a reference value.

[0129] The information indicating the size data is transmitted to the OSD control unit 51, the image providing device 500, etc. The OSD control unit 51 receives the information indicating the size data. The OSD control unit 51 displays the size of the projection image PG using the information indicating the size data. The OSD control unit 51 may adjust the size of the OSD image 100 using the information indicating the size data. The image providing device 500 receives the information indicating the size data. The image providing device 500 may correct the image data to be transmitted to the projector 1 using the information indicating the size data. The OSD control unit 51 and the image providing device 500 perform appropriate control using the information indicating the size data.

[0130] FIG. 9 shows an example of a projection image PG including an OSD image 100. FIG. 9 shows the projection image PG projected onto the projection surface SC. The projection image PG is projected by a projector 1 disposed at a position in the +Z direction of the projection surface SC. The projector 1 is disposed above the projection surface SC. The projection image PG shown in FIG. 9 includes a second OSD image 100b, which is an example of the OSD image 100. The aspect ratio of the projection image PG shown in FIG. 9 is a:b. The second OSD image 100b shown in FIG. 9 includes a second adjustment image 101b, a second message image 103b, and a remote control button icon 105. FIG. 9 shows a virtual horizontal line VH.

[0131] The second adjustment image 101b is an example of the adjustment image 101. The second adjustment image 101b has the same configuration as the first adjustment image 101a shown in Figs. 7 and 8. In Fig. 9, the second adjustment image 101b is displayed in the second region R2. The projector 1 is disposed above the projection surface SC. The user is in a state where it is difficult to perform an operation to accurately match the adjusted image width AW with the exterior width 2W.

[0132] The second message image 103b is an example of the message image 103. The second message image 103b is the same as the first message image 103a shown in Fig. 7 and Fig. 8. The second message image 103b is a message requesting that the adjusted image width AW be made to match the exterior width 2W of the projector 1.

[0133] The remote control button icons 105 are icons corresponding to some of the multiple operation buttons 91 provided on the remote control 90. The remote control button icons 105 indicate the operation buttons 91 that can be used by the user. The remote control button icons 105 can be set to be displayed or hidden by a user's operation. The remote control button icon 105 shown in FIG. 9 is related to an operation of changing the display position of the second adjustment image 101b. The remote control button icon 105 includes multiple operation button icons 106.

[0134] The operation button icon 106 corresponds to the operation button 91 provided on the remote control 90. When the user performs an input operation on the operation button icon 106 or the position change button corresponding to the operation button icon 106, the display position of the second adjustment image 101b is changed. The position change button is included in the multiple operation buttons 91. The operation button icon 106 is selected and input operated by the user operating the remote control 90. The input operation on the operation button icon 106 or the position change button corresponds to an example of a second operation. When the user performs an input operation on the operation button icon 106 or the position change button, the receiving unit 9 receives a position change signal. The OSD control unit 51 receives the position change signal via the receiving unit 9. The OSD control unit 51 receiving the position change signal corresponds to an example of accepting the second operation.

[0135] For example, when the user performs an input operation on the first operation button icon 106a among the multiple operation button icons 106, the display position of the second adjustment image 101b is changed to a position in the +Z direction. Alternatively, when the user performs an input operation on the position change button corresponding to the first operation button icon 106a, the display position of the second adjustment image 101b is changed to a position in the +Z direction.

[0136] FIG. 10 shows an example of a projection image PG including an OSD image 100. FIG. 10 shows the projection image PG projected onto the projection surface SC. The projection image PG is projected by a projector 1 disposed at a position in the +Z direction of the projection surface SC. The projector 1 is disposed above the projection surface SC. The projection image PG shown in FIG. 10 includes a second OSD image 100b. The aspect ratio of the projection image PG shown in FIG. 10 is a:b. FIG. 10 shows a state when the display position of the second adjustment image 101b is changed.

[0137] When the OSD control unit 51 receives the position change signal, it changes the display position of the second adjustment image 101b. The second adjustment image 101b is displayed in the first region R1 based on the position change signal. When the projection image PG is horizontally divided into two equal parts, the second adjustment image 101b is disposed in the region closer to the projector 1. The second adjustment image 101b shown in FIG. 10 is displayed upside down. By displaying the second adjustment image 101b in the first region R1, the second adjustment image 101b moves closer to the projector 1. It becomes easier for the user to compare the adjusted image width AW of the second adjustment image 101b with the exterior width 2W.

[0138] 10, the OSD control unit 51 changes the display position of the second adjustment image 101b based on the position change signal, but this is not limited to the above. The OSD control unit 51 may change the display position of the second adjustment image 101b based on installation information of the projector 1. The installation information is stored in advance in the memory 7. The installation information includes position information on where the projector 1 is installed with respect to the projection surface SC, or information on the orientation of the projection image PG.

[0139] It is preferable that the second adjustment image 101b is disposed in an area close to the exterior housing 2 of the projector 1 when the projection image PG is horizontally divided into two equal parts. The user can easily perform an operation to make the adjusted image width AW of the second adjusted image 101b coincide with the exterior width 2W of the projector 1.

[0140] The OSD control unit 51 receives a position change signal for changing the display position of the second adjustment image 101b via the receiving unit 9, and changes the display position of the second adjustment image 101b in the projection image PG based on the position change signal. The user can move the display position of the second adjusted image 101b closer to the projector 1. This makes it easier for the user to adjust the adjusted image width AW.

[0141] FIG. 11 shows an example of a projection image PG including an OSD image 100. FIG. 11 shows the projection image PG projected onto the projection surface SC. The projection image PG is projected by a projector 1 disposed at a position in the -Z direction of the projection surface SC. The projector 1 is disposed below the projection surface SC. The projection image PG shown in FIG. 11 includes a third OSD image 100c, which is an example of the OSD image 100. The aspect ratio of the projection image PG shown in FIG. 11 is a:b. The third OSD image 100c shown in FIG. 11 includes a third adjustment image 101c, a third message image 103c, and a slider image 107.

[0142] The third adjustment image 101c is an example of the adjustment image 101. The third adjustment image 101c is an image in which the adjusted image width AW is adjusted by the user. The third adjustment image 101c is composed of a straight line along the Y axis. The straight line has arrows on both ends. The width of the straight line along the Y axis corresponds to the adjusted image width AW. The third adjustment image 101c is positioned in the area closer to the projector 1 when the projected image PG is horizontally divided into two equal parts.

[0143] The third message image 103c is an example of the message image 103. The third message image 103c is an image that displays information to notify the user. The third message image 103c is a message that prompts the user to adjust the adjusted image width AW using the slider image 107. The third message image 103c shows the third adjustment image 101c as a reference line. The third message image 103c is a message that requests the adjusted image width AW to match the exterior width 2W of the projector 1.

[0144] The slider image 107 changes the adjusted image width AW of the third adjustment image 101c. The slider image 107 includes a slider mark 107m. The user uses the remote control 90 to move the slider mark 107m in the +Y direction or the -Y direction. The OSD control unit 51 enlarges or reduces the adjusted image width AW in accordance with the display position of the slider mark 107m. The user can use the slider image 107 to make the adjusted image width AW of the third adjustment image 101c match or approximately match the exterior width 2W of the projector 1. At this time, the OSD control unit 51 has a function of accepting an input operation from the user.

[0145] FIG. 12 shows an example of a projection image PG including an OSD image 100. FIG. 12 shows the projection image PG projected onto the projection surface SC. The projection image PG is projected by a projector 1 disposed at a position in the -Z direction of the projection surface SC. The projector 1 is disposed below the projection surface SC. The projection image PG shown in FIG. 12 includes a fourth OSD image 100d, which is an example of the OSD image 100. The aspect ratio of the projection image PG shown in FIG. 12 is a:b. The fourth OSD image 100d shown in FIG. 12 includes a fourth adjustment image 101d, a fourth message image 103d, a size adjustment image 109, and a screen transition instruction icon 111.

[0146] The fourth adjustment image 101d is an example of the adjustment image 101. The fourth adjustment image 101d is an image in which the adjusted image width AW is adjusted by the user. The fourth adjustment image 101d is a rectangular shape. The width of the rectangle along the Y axis corresponds to the adjusted image width AW. The fourth adjustment image 101d is disposed in an area closer to the projector 1 when the projection image PG is horizontally divided into two equal parts.

[0147] The fourth message image 103d is an example of the message image 103. The fourth message image 103d is an image that displays information to notify the user. The fourth message image 103d is a message that prompts the user to adjust the adjusted image width AW. The fourth message image 103d represents the fourth adjustment image 101d as a reference image. The fourth message image 103d is a message that requests the user to match the adjusted image width AW with the exterior width 2W of the projector 1.

[0148] The size adjustment image 109 accepts an input operation for enlarging or reducing the adjusted image width AW of the fourth adjustment image 101d. The size adjustment image 109 includes a first size adjustment icon 110a, a second size adjustment icon 110b, and a size display field 110c.

[0149] The first size adjustment icon 110a accepts an input operation by the user. When the user performs an input operation on the first size adjustment icon 110a using the remote control 90, the OSD control unit 51 reduces the adjusted image width AW of the fourth adjustment image 101d. When the user performs an input operation on a reduce button corresponding to the first size adjustment icon 110a, the OSD control unit 51 may reduce the adjusted image width AW of the fourth adjustment image 101d. The reduce button is included in the multiple operation buttons 91 provided on the remote control 90.

[0150] The second size adjustment icon 110b accepts an input operation by the user. When the user performs an input operation on the second size adjustment icon 110b using the remote control 90, the OSD control unit 51 enlarges the adjusted image width AW of the fourth adjustment image 101d. When the user performs an input operation on an enlarge button corresponding to the second size adjustment icon 110b, the OSD control unit 51 may enlarge the adjusted image width AW of the fourth adjustment image 101d. The enlarge button is included in the multiple operation buttons 91 provided on the remote control 90.

[0151] The size display field 110c displays the size of the projection image PG. When the user performs an input operation on the first size adjustment icon 110a or the second size adjustment icon 110b, the OSD control unit 51 acquires an adjustment signal. The adjustment signal includes the amount of operation by the user. The OSD control unit 51 transmits the adjustment signal to the data processing unit 53. The data processing unit 53 receives the adjustment signal and calculates size data based on the adjustment signal. The data processing unit 53 outputs information indicating the size data to the OSD control unit 51. The OSD control unit 51 acquires the information indicating the size data and displays the size data in the size display field 110c. The size display field 110c shown in FIG. 12 displays the diagonal length Y of the projection image PG in inches as the size data. The size display field 110c corresponds to an example of a fourth image.

[0152] Outputting the information indicating the size data includes using the image projection device 3 to project a size display field 110c indicating the size data onto the projection surface SC. The user can recognize the size of the projection image PG by checking the size display field 110c.

[0153] The screen transition instruction icon 111 accepts an instruction to change various images displayed in the fourth OSD image 100d. When the user performs an input operation on the screen transition instruction icon 111 using the remote control 90, the OSD control unit 51 changes various images displayed in the fourth OSD image 100d. The OSD control unit 51 may erase the fourth OSD image 100d. When the user performs an input operation on the screen transition instruction icon 111, the adjustment process of the adjusted image width AW by the user is completed.

[0154] FIG. 13 shows an example of a projection image PG including an OSD image 100. FIG. 13 shows the projection image PG projected onto the projection surface SC. The projection image PG is projected by a projector 1 disposed at a position in the -Z direction of the projection surface SC. The projector 1 is disposed below the projection surface SC. The projection image PG shown in FIG. 13 includes a fifth OSD image 100e, which is an example of the OSD image 100. The aspect ratio of the projection image PG shown in FIG. 13 is a:b. The fifth OSD image 100e shown in FIG. 13 includes a fifth adjustment image 101e, a fifth message image 103e, a size adjustment image 109, and a screen transition instruction icon 111.

[0155] The fifth adjustment image 101e is an example of the adjustment image 101. The fifth adjustment image 101e is an image in which the adjusted image width AW is adjusted by the user. The fifth adjustment image 101e is an image showing the exterior housing 2 of the projector 1. The adjustment image 101 is not limited to a figure, and an image may be used. The width of the image along the Y axis corresponds to the adjusted image width AW. The fifth adjustment image 101e is placed in an area close to the projector 1 when the projection image PG is horizontally divided into two equal parts.

[0156] A fifth message image 103e included in the fifth OSD image 100e is the same as the fourth message image 103d shown in Fig. 12. The fifth message image 103e may include a different message from that of the fourth message image 103d.

[0157] The size adjustment image 109 and the screen transition instruction icon 111 included in the fifth OSD image 100e are the same as the size adjustment image 109 and the screen transition instruction icon 111 shown in Fig. 12. The fifth OSD image 100e may include the slider image 107 shown in Fig. 11 instead of the size adjustment image 109. The fifth OSD image 100e does not need to display the screen transition instruction icon 111.

[0158] FIG. 14 shows an example of a projection image PG including an OSD image 100. FIG. 14 shows the projection image PG projected onto the projection surface SC. The projection image PG is projected by a projector 1 disposed at a position in the -Z direction of the projection surface SC. The projector 1 is disposed below the projection surface SC. The projection image PG shown in FIG. 14 includes a sixth OSD image 100f, which is an example of the OSD image 100. The aspect ratio of the projection image PG shown in FIG. 14 is a:b. The sixth OSD image 100f shown in FIG. 14 includes a sixth adjustment image 101f, a sixth message image 103f, and a width change operation image 113.

[0159] The projector 1 shown in FIG. 14 has two width adjustment members 2a. The two width adjustment members 2a are protrusions provided on the exterior housing 2. The two width adjustment members 2a are arranged at an interval of the partial exterior width 2Wp along the Y axis. The width adjustment member 2a is used as a reference when the user adjusts the width of the sixth adjustment image 101f. The user matches or approximately matches the adjusted image width AW of the sixth adjustment image 101f with the partial exterior width 2Wp. The shape of the width adjustment member 2a is not limited to a protrusion. The shape of the width adjustment member 2a is not limited as long as the user can adjust the adjusted image width AW.

[0160] The sixth adjustment image 101f is an example of the adjustment image 101. The sixth adjustment image 101f is an image in which the adjusted image width AW is adjusted by the user. The first adjustment image 101a is configured as an ellipse with the major axis along the Y axis. The width of the ellipse along the Y axis corresponds to the adjusted image width AW. The sixth adjustment image 101f is disposed in the area closer to the projector 1 when the projected image PG is horizontally divided into two equal parts.

[0161] The sixth message image 103f is an example of the message image 103. The sixth message image 103f is an image that displays information to notify the user. The sixth message image 103f is a message that prompts the user to adjust the adjusted image width AW. The sixth message image 103f represents the sixth adjustment image 101f as the reference image. The sixth message image 103f is a message that requests the adjusted image width AW to match the partial exterior width 2Wp.

[0162] The width change operation image 113 accepts an input operation to enlarge or reduce the adjusted image width AW of the sixth adjustment image 101f. The width change operation image 113 includes a first width adjustment icon 114a, a second width adjustment icon 114b, and a confirmation button icon 114c. The first width adjustment icon 114a, the second width adjustment icon 114b, and the confirmation button icon 114c correspond to the reduce button, the enlarge button, and the confirmation button included in the remote control 90, respectively. The reduce button, the enlarge button, and the confirmation button are included in the multiple operation buttons 91. An input operation to the width change operation image 113 by the user corresponds to an input operation to the remote control 90.

[0163] The first width adjustment icon 114a accepts an input operation by the user. When the user performs an input operation on the first width adjustment icon 114a using the remote control 90, the OSD control unit 51 reduces the adjusted image width AW of the sixth adjustment image 101f.

[0164] The second width adjustment icon 114b accepts an input operation by the user. When the user performs an input operation on the second width adjustment icon 114b using the remote control 90, the OSD control unit 51 enlarges the adjusted image width AW of the sixth adjustment image 101f.

[0165] The enter button icon 114c accepts an input operation by the user. When the user performs an input operation on the enter button icon 114c using the remote control 90, the OSD control section 51 acquires a enter signal.

[0166] The user adjusts the adjusted image width AW of the sixth adjustment image 101f using the width change operation image 113. When the user performs an input operation on the first width adjustment icon 114a or the second width adjustment icon 114b, an adjustment signal is transmitted to the OSD control unit 51. The user adjusts the amount of change in the adjusted image width AW by adjusting the amount of operation on the first width adjustment icon 114a or the second width adjustment icon 114b. The amount of operation is adjusted by the operation time or number of operations on the first width adjustment icon 114a or the second width adjustment icon 114b. The amount of operation is included in the adjustment signal.

[0167] The OSD control unit 51 acquires the adjustment signal. Receiving the adjustment signal corresponds to an example of accepting a first operation. The OSD control unit 51 changes the ratio data in response to the adjustment signal. The OSD control unit 51 enlarges or reduces the adjusted image width AW by changing the ratio data.

[0168] When the user makes the adjusted image width AW match or approximately match the partial exterior width 2Wp, the user performs an input operation on the decision button icon 114c. When the user performs an input operation on the decision button icon 114c, the OSD control unit 51 acquires a decision signal. When the OSD control unit 51 acquires the decision signal, it determines that the adjusted image width AW has been adjusted to the adjustment value by the user. When the OSD control unit 51 determines that the adjusted image width AW has been adjusted to the adjustment value, it transmits the changed ratio data to the data processing unit 53. The adjustment value corresponds to an example of a second value. When the adjustment value is a value that matches or approximately matches the partial exterior width 2Wp, the adjustment value becomes a designated value that is assumed in advance. The partial exterior width 2Wp corresponds to an example of a case length.

[0169] The data processing unit 53 receives the ratio data when the determination signal is transmitted. The data processing unit 53 calculates size data based on the reference value and the ratio data. Here, the reference value is the actual value of the partial exterior width 2Wp between the two width adjustment members 2a. The actual value of the partial exterior width 2Wp is stored in advance in the memory 7. The actual value of the partial exterior width 2Wp is a known value.

[0170] The projector 1 includes an exterior housing 2 that houses at least a portion of the image projection device 3 and a control device 5. The adjustment value corresponds to a partial exterior width 2Wp of a width adjustment member 2a, which is the length of at least a portion of the exterior housing 2, and the projected image PG includes a sixth message image 103f that requests the user to match the adjusted image width AW of a sixth adjustment image 101f with the partial exterior width 2Wp. The user can understand that the partial exterior width 2Wp of the width adjustment member 2a, which is a part of the exterior casing 2, and the adjusted image width AW should be made to match each other.

[0171] FIG. 15 shows an example of a projection image PG including an OSD image 100. FIG. 15 shows a projection image PG projected onto a projection surface SC. The projection image PG is projected by a projector 1 disposed at a position in the -Z direction of the projection surface SC. The projector 1 is not shown in FIG. 15. The projection image PG shown in FIG. 15 includes a seventh OSD image 100g, which is an example of the OSD image 100. The aspect ratio of the projection image PG shown in FIG. 15 is a:b. The seventh OSD image 100g shown in FIG. 15 includes a seventh adjustment image 101g, a seventh message image 103g, and a slider image 107. The slider image 107 is the same as the slider image 107 shown in FIG. 11.

[0172] In FIG. 15, a remote control 90 is placed adjacent to the projection surface SC. The remote control 90 is used as a comparison when the user adjusts the adjusted image width AW. The remote control 90 has a remote control width 90W along the Y axis. The remote control width 90W corresponds to the exterior width 2W of the projector 1. The remote control width 90W is used as a reference when the user adjusts the adjusted image width AW of the seventh adjustment image 101g. The user makes the adjusted image width AW of the seventh adjustment image 101g match or approximately match the remote control width 90W.

[0173] The seventh adjustment image 101g is an example of the adjustment image 101. The seventh adjustment image 101g is an image in which the adjusted image width AW is adjusted by the user. The seventh adjustment image 101g is an image of the remote control 90. The width of the image along the Y axis corresponds to the adjusted image width AW.

[0174] The seventh message image 103g is an example of the message image 103. The seventh message image 103g is an image that displays information to notify the user. The seventh message image 103g is a message that prompts the user to adjust the adjusted image width AW. The seventh message image 103g represents the seventh adjustment image 101g as a reference image. The seventh message image 103g is a message that requests the user to match the adjusted image width AW with the remote control width 90W of the remote control 90.

[0175] The user adjusts the adjusted image width AW of the seventh adjustment image 101g using the slider image 107. When the user performs an input operation on the slider mark 107m, an adjustment signal is transmitted to the OSD control unit 51. The user adjusts the amount of change in the adjusted image width AW by adjusting the amount of operation of the slider mark 107m. The amount of operation is adjusted by the amount of movement of the slider mark 107m. The amount of operation is included in the adjustment signal.

[0176] The OSD control unit 51 acquires the adjustment signal. Receiving the adjustment signal corresponds to an example of accepting a first operation. The OSD control unit 51 changes the ratio data in response to the adjustment signal. The OSD control unit 51 enlarges or reduces the adjusted image width AW by changing the ratio data.

[0177] When the adjusted image width AW matches or nearly matches the remote control width 90W, the user performs an input operation on the decision button among the operation buttons 91. When the user performs an input operation on the decision button, the OSD control unit 51 acquires a decision signal. When the OSD control unit 51 acquires the decision signal, it determines that the adjusted image width AW has been adjusted to the adjustment value by the user. When the OSD control unit 51 determines that the adjusted image width AW has been adjusted to the adjustment value, it transmits the changed ratio data to the data processing unit 53. When the adjustment value matches or nearly matches the remote control width 90W, the adjustment value becomes a designated value assumed in advance. The remote control width 90W corresponds to an example of the second length.

[0178] The data processing unit 53 receives the ratio data when the determination signal is transmitted. The data processing unit 53 calculates size data based on the reference value and the ratio data. Here, the reference value is the actual value of the remote control width 90W of the remote control 90. The actual value of the remote control width 90W is stored in advance in the memory 7. The actual value of the remote control width 90W is a known value. The data processing unit 53 outputs the size data, or data obtained by converting the size data, to the OSD control unit 51, etc. as information indicating the size data.

[0179] FIG. 16 shows an example of a projection image PG including an OSD image 100. FIG. 16 shows the projection image PG projected onto the projection surface SC. The projection image PG is projected by a projector 1 disposed at a position in the -Z direction of the projection surface SC. The projection image PG shown in FIG. 16 includes an eighth OSD image 100h which is an example of the OSD image 100. The aspect ratio of the projection image PG shown in FIG. 16 is a:b. The eighth OSD image 100h shown in FIG. 16 includes an eighth adjustment image 101h, an eighth message image 103h, a first image resize icon 115a, and a second image resize icon 115b.

[0180] The eighth adjusted image 101h is an example of the adjusted image 101. The eighth adjusted image 101h is an image in which the adjusted image width AW is adjusted by the user. The eighth adjusted image 101h is a portrait image including a person's face. The person's face corresponds to an example of an object. The width of the face shown in the portrait image along the Y axis is the adjusted image width AW. The width of the face along the Y axis corresponds to an example of a second length.

[0181] The portrait image is generated by photographing an actual person. The width of the face along the Y axis corresponds to the actual size of the person. The user can bring the size of the face, including the width along the Y axis, closer to the actual size by enlarging or reducing the portrait image. By bringing the size of the face closer to the actual size, the user can make the size of the face match or approximately match the actual size. The actual size corresponds to an example of the length of the object.

[0182] 16 shows an eighth adjustment image 101h including a person's face, but is not limited thereto. Instead of a person's face, the eighth adjustment image 101h may include an animal, a part of a person such as a hand or a finger, or a structure such as a car. The eighth adjustment image 101h may be any image whose actual size is known to the user.

[0183] The eighth message image 103h is an example of the message image 103. The eighth message image 103h is an image that displays information to notify the user. The eighth message image 103h is a message that prompts the user to adjust the adjusted image width AW. The eighth message image 103h represents actual size as life-size. The eighth message image 103h is a message that requests an image size adjustment operation to bring the adjusted image width AW closer to the actual size of a person's face. The image size adjustment operation corresponds to an example of the third operation. The eighth message image 103h corresponds to an example of the third image.

[0184] The first image size change icon 115a accepts an input operation by the user. When the user performs an input operation on the first image size change icon 115a using the remote control 90, the OSD control section 51 reduces the adjusted image width AW of the eighth adjustment image 101h.

[0185] The second image size change icon 115b accepts an input operation by the user. When the user performs an input operation on the second image size change icon 115b using the remote control 90, the OSD control section 51 increases the adjusted image width AW of the eighth adjustment image 101h.

[0186] The user adjusts the adjusted image width AW of the eighth adjustment image 101h using the remote control 90. When the user performs an input operation on the first image resize icon 115a or the second image resize icon 115b, an adjustment signal is sent to the OSD control unit 51. The user adjusts the amount of change in the adjusted image width AW by adjusting the amount of operation on the first image resize icon 115a or the second image resize icon 115b. The amount of operation is adjusted by the operation time or number of operations on the first image resize icon 115a or the second image resize icon 115b. The amount of operation is included in the adjustment signal.

[0187] The OSD control unit 51 acquires the adjustment signal. Receiving the adjustment signal corresponds to an example of accepting a first operation. The OSD control unit 51 changes the ratio data in response to the adjustment signal. The OSD control unit 51 enlarges or reduces the adjusted image width AW by changing the ratio data.

[0188] The user performs an image size adjustment operation using the first image size change icon 115a or the second image size change icon 115b. The user makes the adjusted image width AW match or approximately match the actual size by bringing the adjusted image width AW closer to the actual size. When the adjusted image width AW matches or approximately matches the actual size, the user performs an input operation on the decision button. The decision button is included in the operation button 91 of the remote control 90. When the user performs an input operation on the decision button, the OSD control unit 51 acquires a decision signal. When the OSD control unit 51 acquires the decision signal, it determines that the adjusted image width AW has been set to an adjustment value by the user. When the OSD control unit 51 determines that the adjusted image width AW has been adjusted to the adjustment value, it transmits the changed ratio data to the data processing unit 53. The adjustment value corresponds to an example of the second value. When the adjustment value is a value that matches or approximately matches the actual size, the adjustment value becomes a designated value that is assumed in advance.

[0189] The data processing unit 53 receives the ratio data when the determination signal is transmitted. The data processing unit 53 calculates size data based on the reference value and the ratio data. Here, the reference value is the actual value of the width of the person's face along the Y axis. The actual value is stored in advance in the memory 7. The actual value is a known value.

[0190] The adjusted image width AW corresponds to the actual size of the face, which is a known length of a person. The projection image PG includes, via the receiving unit 9, an eighth message image 103h that prompts the user to perform an image resizing operation to bring the adjusted image width AW of the eighth adjusted image 101h closer to the actual size of the face. The user can cause the projector 1 to calculate the size data by using the eighth adjustment image 101h that includes the face of a person whose size is known.

[0191] The projector 1 includes an image projection device 3 and a control device 5. The control device 5 executes the following operations: projecting a projection image PG including an adjusted image 101 onto a projection surface SC using the image projection device 3, acquiring a reference value related to an image width PW of the adjusted image 101 on the projection surface SC, and outputting information indicating size data corresponding to the image width PW of the projection image PG projected onto the projection surface SC when the adjusted image width AW on the projection surface SC is set to the adjusted value based on the reference value. The projector 1 is able to calculate the size of the projection image PG without using a distance measurement sensor.

[0192] The projector 1 further includes a receiving unit 9. The control device 5 receives an adjustment operation for enlarging or reducing the adjusted image 101 via the receiving unit 9, and outputs information indicating size data based on a reference value and an amount of adjustment operation until the adjusted image width AW becomes the adjustment value. When the user performs an adjustment operation, the projector 1 can calculate the size data.

[0193] 17 shows a control flow executed by the projector 1 and a user. The control flow executed by the projector 1 corresponds to an example of a control method of the projector 1. The control flow executed by the projector 1 is executed by the control device 5 operating the control program CP.

[0194] In step S101, the projector 1 displays an adjusted image 101. The adjusted image 101 is included in an OSD image 100. The OSD image 100 is projected within a projection image PG. As an example, the projector 1 projects a first OSD image 100a including a first adjusted image 101a onto the projection surface SC.

[0195] When the projector 1 projects the OSD image 100 onto the projection surface SC, the projector 1 acquires a reference value in step S103. The data processing unit 53 of the control device 5 acquires the reference value by reading out the reference value stored in the memory 7. The reference value is a value related to the size of the projection image PG, such as the image width PW and diagonal length Y of the projection image PG. The reference value is a known value, such as the actual value of the exterior width 2W of the exterior housing 2. When the projector 1 projects the first OSD image 100a including the first adjustment image 101a, the data processing unit 53 acquires the actual value of the exterior width 2W as the reference value.

[0196] After the projector 1 projects the OSD image 100 on the projection surface SC, the user adjusts the adjusted image width AW of the adjusted image 101 to an adjustment value in step S201. When the projector 1 projects the first OSD image 100a on the projection surface SC, the user adjusts the image adjustment width AW of the first adjusted image 101a. The user uses the remote control 90 to perform an adjustment operation to enlarge or reduce the image adjustment width AW of the first adjusted image 101a. When the adjustment operation is performed, the remote control 90 transmits an adjustment signal to the receiving unit 9. The OSD control unit 51 receives the adjustment signal via the receiving unit 9. The OSD control unit 51 enlarges or reduces the adjusted image width AW based on the adjustment signal. The user enlarges or reduces the adjusted image width AW to make the adjusted image width AW match or approximately match the exterior width 2W. The adjusted image width AW is adjusted to the adjustment value. When the adjusted image width AW matches or approximately matches the exterior width 2W, the adjustment value becomes a designated value assumed in advance.

[0197] After adjusting the adjusted image width AW to the adjustment value, the user performs an input operation on the decision button in step S203. The decision button is included in the multiple operation buttons 91 provided on the remote control 90. When the user performs an input operation on the decision button, the remote control 90 transmits a decision signal to the receiving unit 9.

[0198] After the user performs an input operation on the decision button, the projector 1 acquires ratio data in step S105. The OSD control unit 51 receives the decision signal via the receiving unit 9. The OSD control unit 51 acquires ratio data when the adjusted image width AW of the first adjusted image 101a is adjusted to the adjustment value. The ratio data is, for example, a width ratio between the image width PW of the projection image PG and the adjusted image width AW. The OSD control unit 51 enlarges or reduces the adjusted image width AW by varying the ratio data. The OSD control unit 51 acquires ratio data when the adjusted image width AW is adjusted to the adjustment value. The OSD control unit 51 transmits the ratio data to the data processing unit 53.

[0199] After acquiring the ratio data, the projector 1 calculates size data in step S107. The data processing unit 53 calculates the size data based on the reference value and the ratio data. The ratio data is a value when the adjusted image width AW of the adjusted image 101 is set to the adjustment value. The size data is a value corresponding to the size of the projection image PG projected on the projection surface SC. The size data is calculated using formula (1).

[0200] After calculating the size data, the projector 1 outputs information indicating the size data in step S109. The data processing unit 53 outputs the size data or data obtained by converting the size data to the outside as output data. The data processing unit 53 outputs the size data to the OSD control unit 51 and the image providing device 500. As an example, the OSD control unit 51 adjusts the size of the OSD image 100 using the output data. The image providing device 500 corrects the image data using the output data.

[0201] The control method of the projector 1 includes projecting a projection image PG including an adjusted image 101 onto a projection surface SC, acquiring a reference value related to an image width PW on the projection surface SC, and outputting information indicating size data corresponding to the image width PW of the projection image PG projected onto the projection surface SC when the adjusted image width AW on the projection surface SC is set to an adjusted value based on the reference value. The projector 1 is able to calculate the size of the projection image PG without using a distance measurement sensor.

[0202] The control program CP causes the projector 1 to project a projection image PG including an adjusted image 101 onto a projection surface SC, acquire a reference value related to an image width PW on the projection surface SC, and output information indicating size data corresponding to the image width PW of the projection image PG projected onto the projection surface SC when the adjusted image width AW of the adjusted image 101 on the projection surface SC is set to the adjusted value based on the reference value. The projector 1 is able to calculate the size of the projection image PG without using a distance measurement sensor.

[0203] The following is a summary of this disclosure.

[0204] Appendix 1 The projector of the present disclosure includes an optical device and a processing device, and the processing device performs the following operations: projecting a projection image including a first image onto a projection surface using the optical device; acquiring a first value related to a first length of the projected first image on the projection surface; and outputting information indicating a third value corresponding to a second length of the projection image projected onto the projection surface when the first length on the projection surface is set to a second value based on the first value. The projector is capable of outputting the third value without using a distance sensor.

[0205] Appendix 2 A projector as described in Appendix 1, further including an input device, wherein the processing device receives a first operation to enlarge or reduce the first image via the input device, and outputting the information indicating the third value means outputting the information indicating the third value based on the first value and the amount of operation of the first operation until the second length becomes the second value. When the user performs a first operation, the projector can output a third value.

[0206] Appendix 3 A projector as described in Appendix 1 or Appendix 2, further comprising a case housing at least a portion of the optical device and the processing device, wherein the first value corresponds to a case length that is a length of at least a portion of the case, and the projected image includes a second image that prompts a user to match the first length with the case length. The user can know to match the second length with the case length, and the projector can output a third value.

[0207] Appendix 4 In the projector according to any one of Supplementary Notes 1 to 3, the first image is disposed in a region close to the case when the projected image is horizontally divided into two equal parts. The user can easily perform an operation to adjust the length of the first image.

[0208] Appendix 5 A projector as described in Appendix 2, wherein the processing device receives a second operation for changing a display position of the first image via the input device, and changes the display position of the first image in the projected image based on the second operation. The user can change the display position of the first image, which makes it easier for the user to adjust the length of the first image.

[0209] Appendix 6 A projector as described in Appendix 2, wherein the first length corresponds to an object length that is a length of a known object, and the projected image includes a third image that prompts a user, via the input device, to perform a third operation to bring the first length of the first image closer to the object length. The user can use an object of known size to output a third value.

[0210] Appendix 7 A projector described in any one of Supplementary Notes 1 to 6, wherein outputting the information indicating the third value includes projecting a fourth image indicating the third value onto the projection surface using the optical device. The user can recognize the third value by checking the fourth image.

[0211] Appendix 8 A control method of a projector disclosed herein includes projecting a projection image including a first image onto a projection surface, acquiring a first value relating to a first length of the first image on the projection surface, and outputting information indicating a third value corresponding to a second length of the projection image projected onto the projection surface when the first length on the projection surface is set to a second value based on the first value. The projector is capable of outputting the third value without using a distance sensor.

[0212] Appendix 9 The program disclosed herein causes a projector to project a projection image including a first image onto a projection surface, acquire a first value relating to a first length of the first image on the projection surface, and output information indicating a third value corresponding to a second length of the projection image projected onto the projection surface when the first length on the projection surface is set to a second value based on the first value. The projector is capable of outputting the third value without using a distance sensor. [Explanation of symbols]

[0213] 1...projector, 2...exterior housing, 2a...width adjustment member, 2W...exterior width, 2Wp...partial exterior width, 3...image projection device, 4...cooling device, 5...control device, 6...power supply device, 7...memory, 8...communication interface, 9...receiving unit, 11...terminal, 21...top surface, 22...bottom surface, 23...front surface, 24...rear surface, 25...left side surface, 26...right side surface, 28...legs, 31...light source device, 33...image generating device, 35...projection optical device, 41...filter, 42...duct, 43...first fan, 44...second fan, 45...third fan, 46...fourth fan, 47...fifth fan, 51...OSD control unit, 53 ...data processing unit, 55...image control unit, 90...remote control unit, 90W...remote control width, 91...operation button, 100...OSD image, 100a...first OSD image, 100b...second OSD image, 100c...third OSD image, 100d...fourth OSD image, 100e...fifth OSD image, 100f...sixth OSD image, 100g...seventh OSD image, 100h...eighth OSD image, 101...adjustment image, 101a...first adjustment image, 101b...second adjustment image, 101c...third adjustment image, 101d...fourth adjustment image, 101e...fifth adjustment image, 101f...sixth adjustment image, 101g...seventh adjustment image , 101h...8th adjustment image, 103...message image, 103a...1st message image, 103b...2nd message image, 103c...3rd message image, 103d...4th message image, 103e...5th message image, 103f...6th message image, 103g...7th message image, 103h...8th message image, 105...remote control button icon, 106...operation button icon, 106a...1st operation button icon, 107...slider image, 107m...slider mark, 109...size adjustment image, 110a...1st size adjustment icon, 110 b...second size adjustment icon, 110c...size display field, 111...screen transition instruction icon, 113...width change operation image, 114a...first width adjustment icon, 114b...second width adjustment icon, 114c...decision button icon, 115a...first image size change icon, 115b...second image size change icon, 500...image providing device, 211...top recess, 212...passage opening, 241...rear recess, 251...left side opening, 261...right side opening, 311...first light source housing, 312...light source, 313...afocal optical element, 314...first phase difference element, 315...diffuse transmission element,316...light combining element, 317...first light collecting element, 318...wavelength conversion device, 319...second phase difference element, 320...second light collecting element, 321...diffusion optical element, 322...third phase difference element, 331...second light source housing, 332...uniformization device, 333...color separation device, 334...relay device, 335...light modulation device, 335B...blue light modulation element, 335G...green light modulation element, 335R...red Light modulation element, 336...color synthesis element, 351...lens housing, 352...incident light path, 353...bending member, 354...passing light path, 355...light path changing member, 1000...projection system, 3111...exit, 3121...support member, 3122...solid-state light-emitting element, 3123...collimator lens, 3124...heat receiving member, 3125...heat dissipation member, 3131...first lens, 3132...second lens 3181 ... wavelength conversion element, 3182 ... rotation device, 3331 ... first color separation element, 3332 ... first reflection element, 3333 ... second color separation element, 3341 ... second reflection element, 3342 ... third reflection element, 3343 ... entrance side lens, 3344 ... relay lens, 3345 ... exit side lens, 3511 ... entrance portion, 3512 ... bending portion, 3513 ... exit portion, 3514 ... opening, 3521 ...incident light path lens, 3541...passing light path lens, AW...adjusted image width, Ax1...first illumination optical axis, Ax2...second illumination optical axis, BL...blue light, CP...control program, GL...green light, PG...projected image, PH...image height, PW...image width, R1...first region, R2...second region, RL...red light, SC...projection surface, VH...virtual horizontal line, WL...white light, Y...diagonal length, YL...yellow light.

Claims

1. An optical device; a processing device; The processing device includes: projecting a projection image including a first image onto a projection surface using the optical device; obtaining a first value associated with a first length of the first image on the projection surface; outputting information indicating a third value corresponding to a second length of the projection image projected on the projection surface when the first length on the projection surface is set to a second value based on the first value; Execute projector.

2. Further comprising an input device, the processing device accepts, via the input device, a first operation for enlarging or reducing the first image; and outputting the information indicating the third value includes outputting the information indicating the third value based on the first value and an operation amount of the first operation until the second length becomes the second value. The projector according to claim 1 .

3. a case for housing at least a portion of the optical device and the processing device; the first value corresponds to a case length that is a length of at least a portion of the case; the projected image includes a second image prompting a user to match the first length with the case length; The projector according to claim 1 .

4. the first image is disposed in a region close to the case when the projected image is horizontally divided into two equal parts; The projector according to claim 3 .

5. The processing device includes: receiving a second operation to change a display position of the first image via the input device; changing the display position of the first image in the projection image based on the second operation; The projector according to claim 2 .

6. the first length corresponds to an object length that is a known object length; the projected image includes a third image that requests a user to perform a third operation, via the input device, to make the first length of the first image closer to the length of the object; The projector according to claim 2 .

7. outputting the information indicative of the third value includes projecting a fourth image indicative of the third value onto the projection surface using the optical device. The projector according to claim 1 .

8. projecting a projection image including a first image onto a projection surface; obtaining a first value associated with a first length of the first image on the projection surface; outputting information indicating a third value corresponding to a second length of the projection image projected on the projection surface when the first length on the projection surface is set to a second value based on the first value; A method for controlling a projector.

9. On the projector, projecting a projection image including a first image onto a projection surface; obtaining a first value associated with a first length of the first image on the projection surface; outputting information indicating a third value corresponding to a second length of the projection image projected on the projection surface when the first length on the projection surface is set to a second value based on the first value; A program that executes the following.

Images