Projector, control method of projector, and program

Abstract

To solve the problem of an increase in manufacturing costs of a projector because of provision of a ranging sensor.SOLUTION: A projector includes an optical device and a processing device, and the processing device executes projection of image light of a projection image that includes a first image in which a length relationship for a first length is known and has the first length to a projection surface by using the optical device, reception of input of a second length as the length of the first image on the projection surface, and output of information showing a third length as the length of the projection image on the projection surface on the basis of the second length and the length relationship.SELECTED DRAWING: Figure 4

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 includes a first image having a known length relationship to a first length, and projects image light of the projection image having the first length onto a projection surface using the optical device, accepts input of a second length that is the length of the first image on the projection surface, and outputs information indicating a third length that is the length of the projection image on the projection surface based on the second length and the length relationship.

[0006] The projector control method disclosed herein includes projecting image light of a projection image having a first length, the projection image including a first image whose length relationship to a first length is known, onto a projection surface from a projector, accepting input of a second length which is the length of the first image on the projection surface, and outputting information indicating a third length which is the length of the projection image on the projection surface based on the second length and the length relationship.

[0007] The program disclosed herein causes a projector to project image light of a projection image having a first length, the projection image including a first image whose length relationship to a first length is known, onto a projection surface, accept input of a second length which is the length of the first image on the projection surface, and output information indicating a third length which is the length of the projection image on the projection surface based on the second length and the length relationship. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram showing a schematic configuration of a projection system. [Diagram 2] FIG. 2 is a diagram showing a schematic configuration of a projection image projected onto a projection surface. [Diagram 3] FIG. 1 is a diagram showing a schematic configuration of a projector. [Figure 4] FIG. 2 is a diagram showing a block configuration of a projector. [Diagram 5] FIG. 4 is a diagram showing an example of a projected image including an OSD image. [Figure 6] FIG. 4 is a diagram showing an example of a projected image including an OSD image. [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. 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 1. The projection system 1 includes a projector 10 and an image providing device 500. The projector 10 projects a projection image PG onto a projection surface SC. The projection system 1 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 10.

[0010] The projection surface SC displays the projection image PG projected from the projector 10. 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 10 is disposed at a position facing the projection surface SC. The projector 10 is communicably connected to the image providing device 500. The projector 10 may be communicably connected to a control device different from the image providing device 500. The projector 10 receives image data from the image providing device 500. The projector 10 projects a projection image PG onto the projection surface SC based on the image data. The projector 10 may project the projection image PG onto the projection surface SC based on display data stored inside.

[0012] The projector 10 includes an operation panel 11. The operation panel 11 is operated by a user. The user performs input operations on the operation panel 11 to perform various settings of the projector 10. The operation panel 11 has a plurality of input buttons 13. The operation panel 11 corresponds to an example of an input device.

[0013] The image providing device 500 is communicably connected to the projector 10. The image providing device 500 transmits image data to the projector 10. The image providing device 500 may have a function of adjusting the image shape of the projection image PG projected by the projector 10 onto the projection surface SC. The image providing device 500 is a tablet terminal, a smartphone, a mobile computer, a desktop computer, or the like.

[0014] The projection system 1 may include a remote control 700. The remote control 700 has an infrared communication function or a Bluetooth communication function. Bluetooth is a registered trademark. The remote control 700 communicates with the projector 10. The remote control 700 has a plurality of operation buttons 710. When a user operates the operation button 710, the remote control 700 transmits an operation signal to the projector 10. The projector 10 receives the operation signal and operates based on the operation signal.

[0015] FIG. 2 shows a schematic configuration of a projection image PG projected onto a projection surface SC. FIG. 2 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. 2 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. 2 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. 2 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] Several figures including FIG. 2 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 toward the projection surface SC. The -X direction is a direction from the back to the front toward 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 toward the projection surface SC. The -Y direction is a direction from the right to the left toward 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. 2, 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. 2.

[0017] 3 shows a schematic configuration of the projector 10. The projector 10 projects a projection image PG onto a projection surface SC. The projector 10 includes an exterior housing 20, an image projection device 30, a power supply unit 50, and a control unit 60.

[0018] The exterior housing 20 houses at least a part of the image projection device 30, a power supply unit 50, and a control unit 60. The exterior housing 20 is provided with a slit, an operation panel 11, etc. The slit is an opening that takes in outside air into the interior of the exterior housing 20.

[0019] The image projection device 30 forms image light according to image information input from an external device. The image projection device 30 enlarges and projects the image light onto a projection surface SC. The image projection device 30 includes a light source unit 31, a homogenizing optical system 32, a color separation optical system 33, a relay optical system 34, an image forming unit 35, an optical component housing 36, and a projection optical unit 37. The image projection device 30 corresponds to an example of an optical device.

[0020] The light source unit 31 emits light to the homogenizing optical system 32. As an example, the light source unit 31 has a solid-state light source and a wavelength conversion element. The solid-state light source emits blue light, which is excitation light. The wavelength conversion element converts at least a portion of the blue light emitted from the solid-state light source into fluorescence containing green light and red light. The light source unit 31 may have a light source lamp such as an extra-high pressure mercury lamp. The light source unit 31 may have a light-emitting element that individually emits blue light, green light, and red light. The light source unit 31 corresponds to an example of a light source.

[0021] The homogenizing optical system 32 homogenizes the light emitted from the light source unit 31. The homogenized light passes through a color separation optical system 33 and a relay optical system 34, and illuminates a modulation area of ​​a transmissive liquid crystal panel 353. The transmissive liquid crystal panel 353 will be described later. The homogenizing optical system 32 includes a first lens array 321, a second lens array 322, a polarization conversion element 323, and a superimposing lens 324.

[0022] The first lens array 321 splits the light emitted from the light source unit 31 into a plurality of partial light beams. The first lens array 321 is composed of a plurality of first lenses. The first lenses are not shown. The plurality of first lenses are arranged in an array on one plane.

[0023] The second lens array 322 is composed of a plurality of second lenses corresponding to the plurality of first lenses. The second lenses are not shown. The plurality of second lenses are arranged in an array on one plane.

[0024] The polarization conversion element 323 converts the light into linearly polarized light having a specific vibration direction. The polarization conversion element 323 converts the other linearly polarized light into one linearly polarized light. As an example, the polarization conversion element 323 converts P-polarized light into S-polarized light.

[0025] The superimposing lens 324 collects the partial light beams from the polarization conversion element 323. The superimposing lens 324 superimposes the collected partial light beams near the transmissive liquid crystal panel 353. The first lens array 321, the second lens array 322, and the superimposing lens 324 configure an integrator optical system that makes the in-plane light intensity distribution of the light uniform.

[0026] The color separation optical system 33 separates the light incident from the homogenization optical system 32 into red light, green light, and blue light. The color separation optical system 33 includes a first dichroic mirror 331, a second dichroic mirror 332, and a first reflecting mirror 333.

[0027] The first dichroic mirror 331 separates the light into blue light and a mixture of red light and green light. The first dichroic mirror 331 reflects the blue light. The first dichroic mirror 331 transmits the red light and the green light.

[0028] The second dichroic mirror 332 separates the mixed light of red light and green light into red light and green light. The second dichroic mirror 332 reflects the green light. The second dichroic mirror 332 transmits the red light. The second dichroic mirror 332 reflects the green light toward the transmissive liquid crystal panel 353.

[0029] First reflecting mirror 333 reflects the blue light separated by first dichroic mirror 331. First reflecting mirror 333 is disposed in the optical path of the blue light. First reflecting mirror 333 reflects the blue light towards transmissive liquid crystal panel 353.

[0030] The relay optical system 34 is provided in the optical path of the red light. The optical path of the red light is longer than the optical paths of the blue light and the green light. The relay optical system 34 suppresses loss of the red light. The relay optical system 34 includes an incident side lens 341, a second reflecting mirror 342, a relay lens 343, and a third reflecting mirror 344.

[0031] Incident side lens 341 prevents optical loss of red light. Incident side lens 341 transmits the red light transmitted by second dichroic mirror 332. Incident side lens 341 is provided between second dichroic mirror 332 and second reflecting mirror 342.

[0032] Second reflecting mirror 342 reflects the red light that has passed through incident-side lens 341. Second reflecting mirror 342 reflects the red light toward relay lens 343. Second reflecting mirror 342 is provided between incident-side lens 341 and relay lens 343 on the optical path of the red light.

[0033] Relay lens 343 prevents optical loss of the red light. Relay lens 343 passes the red light reflected by second reflecting mirror 342. Relay lens 343 is provided between second reflecting mirror 342 and third reflecting mirror 344.

[0034] Third reflecting mirror 344 reflects the red light that has passed through relay lens 343. Third reflecting mirror 344 reflects the red light toward transmissive liquid crystal panel 353. Third reflecting mirror 344 is provided between relay lens 343 and transmissive liquid crystal panel 353 on the optical path of the red light.

[0035] The relay optical system 34 shown in Fig. 3 is provided on the optical path of the red light and guides the red light. The relay optical system 34 is not limited to the configuration shown in Fig. 3. The image projection device 30 may be configured such that the optical path of the blue light is longer than the optical paths of the red light and the green light. In this case, the relay optical system 34 may be configured to guide the blue light.

[0036] The image forming unit 35 modulates red light, green light, and blue light. The image forming unit 35 forms image light by combining the modulated red light, green light, and blue light. The image forming unit 35 has three field lenses 351, three incident side polarizing plates 352, three transmissive liquid crystal panels 353, three exit side polarizing plates 354, one color combining optical system 355, and an optical path shift module 356. The three field lenses 351, the three incident side polarizing plates 352, and the three transmissive liquid crystal panels 353 are provided corresponding to the incident red light, green light, and blue light, respectively.

[0037] Field lens 351 collimates the chief ray of incident light. Field lens 351 into which red light is incident collimates the chief ray of the red light. Field lens 351 into which green light is incident collimates the chief ray of the green light. Field lens 351 into which blue light is incident collimates the chief ray of the blue light.

[0038] Incident side polarizing plate 352 adjusts the polarization of each color light that has passed through field lens 351. Incident side polarizing plate 352 is provided between field lens 351 and transmissive liquid crystal panel 353.

[0039] The transmissive liquid crystal panel 353 modulates the light emitted from the light source unit 31 based on an image signal input from an external device. The transmissive liquid crystal panel 353 modulates the light incident from the incident side polarizing plate 352 according to the image signal. The transmissive liquid crystal panel 353 emits the modulated light. The three transmissive liquid crystal panels 353 are a red light transmissive liquid crystal panel 353R, a green light transmissive liquid crystal panel 353G, and a blue light transmissive liquid crystal panel 353B. The red light transmissive liquid crystal panel 353R modulates the red light incident from the incident side polarizing plate 352 according to the image signal. The red light transmissive liquid crystal panel 353R emits the modulated red light. The green light transmissive liquid crystal panel 353G modulates the green light incident from the incident side polarizing plate 352 according to the image signal. The green light transmissive liquid crystal panel 353G emits the modulated green light. The blue light transmissive liquid crystal panel 353B modulates, in accordance with an image signal, the blue light incident from the incident-side polarizing plate 352. The blue light transmissive liquid crystal panel 353B emits the modulated blue light.

[0040] The transmissive liquid crystal panel 353 has a plurality of pixels arranged along a first axis corresponding to the Y axis and a second axis corresponding to the Z axis. Depending on the aspect ratio of the projection image PG, pixels corresponding to the aspect ratio operate.

[0041] The color combining optical system 355 combines three color lights modulated by the blue light transmissive liquid crystal panel 353B, the green light transmissive liquid crystal panel 353G, and the red light transmissive liquid crystal panel 353R to form image light. The image light formed by the color combining optical system 355 is incident on the projection optical unit 37. The color combining optical system 355 shown in FIG. 3 is formed of a substantially rectangular parallelepiped cross dichroic prism. The color combining optical system 355 may be formed of a plurality of dichroic mirrors.

[0042] The light path shift module 356 shifts the optical path of the image light formed by the color synthesis optical system 355. The light path shift module 356 is disposed between the color synthesis optical system 355 and the projection optical unit 37. The light path shift module 356 increases the resolution of the projection image PG projected onto the projection surface SC by shifting the optical path of the image light. The light path shift module 356 has, as an example, two sets of actuators (not shown). The light path shift module 356 swings about two swing axes by the operation of the two sets of actuators. The two swing axes are perpendicular to each other. The actuator is composed of a magnet and a coil.

[0043] The optical component housing 36 accommodates therein the homogenizing optical system 32, the color separation optical system 33, the relay optical system 34, and the image forming unit 35. The image projection device 30 is designed to have an optical axis Ax. The optical component housing 36 holds the homogenizing optical system 32, the color separation optical system 33, the relay optical system 34, and the image forming unit 35 at predetermined positions on the optical axis Ax. The light source unit 31 and the projection optical unit 37 are disposed at predetermined positions on the optical axis Ax.

[0044] The projection optical unit 37 projects the image light incident from the image forming unit 35 onto the projection surface SC. The projection optical unit 37 has a lens barrel 371. The lens barrel 371 houses, as an example, a plurality of lenses (not shown). The projection optical unit 37 is composed of a lens assembly having a plurality of lenses.

[0045] At least a part of the projection optical unit 37 may be configured to be detachable from the image projection device 30. When at least a part of the projection optical unit 37 is detached from the image projection device 30, the image projection device 30 including the projection optical unit 37 remaining in the image projection device 30 corresponds to an example of an optical device. When the entire projection optical unit 37 is detached, the image projection device 30 excluding the projection optical unit 37 corresponds to an example of an optical device.

[0046] 3 is configured to use a transmissive liquid crystal panel 353, but is not limited to this configuration. The image projection device 30 may be configured to include one or more DMDs (Digital Micromirror Devices).

[0047] The power supply unit 50 supplies power to the image projection device 30, the control unit 60, etc. The power supply unit 50 causes the light source unit 31 to emit light by supplying power to the image projection device 30. The power supply unit 50 supplies power to drive the transmissive liquid crystal panel 353. The power supply unit 50 supplies power to the control unit 60, causing the control unit 60 to execute various controls.

[0048] The control unit 60 is a controller that controls the projector 10. As an example, the control unit 60 is a processor having a CPU (Central Processing Unit). The control unit 60 is composed of one or more processors. The control unit 60 may have a semiconductor memory such as a ROM (Read Only Memory) or a RAM (Random Access Memory). The semiconductor memory functions as a work area for the control unit 60. The control unit 60 corresponds to an example of a processing device.

[0049] Fig. 4 shows a block configuration of the projector 10. Fig. 4 shows the projector 10 and a remote control 700. The projector 10 and the remote control 700 communicate with each other via infrared communication or Bluetooth communication.

[0050] The projector 10 includes an operation panel 11, an image projection device 30, a control unit 60, a memory 70, a communication interface 80, and a receiving section 90. The power supply unit 50 is omitted in FIG.

[0051] The operation panel 11 has a plurality of input buttons 13. Examples of the plurality of input buttons 13 include a menu button, a back button, a decision button, a selection button, an adjustment button, and an initial value button. A user appropriately selects a desired input button 13 from the plurality of input buttons 13 and performs an input operation on the input button 13. The operation panel 11 accepts operations from the user.

[0052] The image projection device 30 projects a projection image PG onto the projection surface SC based on the control of the control unit 60. The image projection device 30 projects the projection image PG onto the projection surface SC based on image data transmitted from the image providing device 500. The image projection device 30 projects an OSD image 100 onto the projection surface SC. OSD is an abbreviation 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 10. Details of the OSD image 100 will be described later.

[0053] The control unit 60 functions as various functional units by executing a control program CP. The control program CP is stored in a memory 70. The control unit 60 functions as an OSD control unit 61, a data processing unit 63, and an image control unit 65 by executing the control program CP.

[0054] The OSD control unit 61 is a functional unit that displays various OSD images 100 within the projection image PG. The OSD control unit 61 displays various OSD images 100 based on OSD data 71. The OSD data 71 is stored in the memory 70. The OSD images 100 include a measurement image 101. The measurement 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.

[0055] The data processing unit 63 calculates size data based on the input data input by the user. The size data is the length of the projection image PG projected on the projection surface SC. The size data is calculated by the data processing unit 63. 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 obtained by either the image height PH or the image width PW and the aspect ratio. The length of the projection image PG projected on the projection surface SC corresponds to an example of the third length. The size data, which is the length of the projection image PG projected on the projection surface SC, corresponds to an example of the information indicating the third length.

[0056] The data processing unit 63 outputs size data. The data processing unit 63 outputs the size data to the OSD control unit 61. The size data is input to the OSD control unit 61. The OSD control unit 61 displays the input data image and the like included in the OSD image 100 in the projection image PG based on the size data. The data processing unit 63 may output the size data to an external device via the communication interface 80. The data processing unit 63 may output the size data to the memory 70. The memory 70 stores the size data.

[0057] The image control unit 65 performs image processing on the image data transmitted from the image providing device 500. The image control unit 65 corrects the image data using various setting values. The various setting values ​​are stored in the memory 70. The setting values ​​include correction values ​​related to aspect ratio, contrast, brightness, and geometric distortion correction. The image control unit 65 may perform image processing to display an OSD image 100 superimposed on an image based on the image data.

[0058] The memory 70 stores various data. The memory 70 is composed of a RAM, a ROM, etc. The memory 70 stores a control program CP and OSD data 71. The memory 70 stores various setting values ​​used by the image control unit 65, size data calculated by the data processing unit 63, etc.

[0059] The control program CP is firmware that causes the control unit 60 to function as various functional parts. The control program CP causes the control unit 60 to operate as an OSD control part 61, a data processing part 63, and an image control part 65. The control program CP may cause the control unit 60 to operate as a functional part other than the OSD control part 61, the data processing part 63, and the image control part 65. The control program CP corresponds to an example of a program.

[0060] The OSD data 71 is various data related to the OSD image 100 displayed in the projection image PG. The OSD data 71 includes ratio data. An example of the ratio data is a width ratio, which is a ratio of the width of the measurement image 101 to the width of the projection image PG. The ratio data is not limited to the width ratio. The ratio data may be a height ratio, which is a ratio of the height of the measurement image 101 to the height of the projection image PG. The ratio data may be a diagonal ratio, which is a ratio of the diagonal length of the measurement image 101 to the diagonal length of the projection image PG. The width, height, and diagonal length of the projection image PG are collectively referred to as an image size. The image size corresponds to an example of a first length. The ratio data corresponds to an example of a known length relationship to the first length.

[0061] The ratio data is set in advance and stored in the memory 70. As an example, the ratio data is calculated by the number of pixels of the transmissive liquid crystal panel 353 that operate when generating image light. The ratio data is a ratio between the number of pixels along the first axis and the number of pixels along the first axis that generates the measurement image 101. The first axis is an axis parallel or approximately parallel to the Y axis. The first axis may be an axis parallel or approximately parallel to the Z axis. The first axis may be an axis parallel or approximately parallel to the diagonal line of the projection image PG. When the number of pixels along the first axis that operate when projecting the projection image PG is n and the number of pixels along the first axis that generates the measurement image 101 is m, the ratio data is m / n. Here, n is an integer equal to or greater than 1. m is an integer equal to or greater than 1 and equal to or less than n. The number of pixels along the first axis that operate when projecting the projection image PG corresponds to the width of the projection image PG.

[0062] The ratio data may be calculated by the operating pixel length of the transmissive liquid crystal panel 353 that operates when generating image light. When the image projection device 30 projects the projection image PG onto the projection surface SC, a predetermined number of pixels operate. The number of operating pixels is determined in advance based on the aspect ratio. The ratio data is a ratio between the pixel length along the first axis of an operating pixel group, which is a collection of a predetermined number of pixels, and the pixel length along the first axis of a generation pixel group that generates the measurement image 101. The pixel length along the first axis of the operating pixel group corresponds to the length of the projection image PG. The pixel length along the first axis of the operating pixel group corresponds to an example of the first length. The ratio data may be calculated using data other than the number of pixels and the pixel length.

[0063] The communication interface 80 is an interface circuit that is communicatively connected to the image providing device 500. The communication interface 80 is connected to the image providing device 500 by wire or wirelessly according to a predetermined communication protocol. The communication interface 80 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 80 receives image data from the image providing device 500. The communication interface 80 transmits various setting data and the like of the projector 10 to the image providing device 500 in response to the control of the control unit 60. The communication interface 80 may transmit size data to the image providing device 500. The communication interface 80 may be communicatively connected to an external device different from the image providing device 500. The communication interface 80 transmits various setting data, size data, and the like to the external device. The communication interface 80 outputs the size data to the image providing device 500 or an external device.

[0064] The receiving unit 90 receives an operation signal from the remote control 700. The receiving unit 90 is composed of a receiving circuit such as an infrared communication circuit or a Bluetooth communication circuit. The receiving unit 90 receives the operation signal by infrared communication or Bluetooth communication. The operation signal includes a power operation signal for controlling the power supply of the projector 10, an instruction signal related to the OSD image 100, and the like. The operation signal may include measurement data indicating the measurement results of the measurement image 101. The receiving unit 90 transmits the operation signal to the control unit 60. The control unit 60 performs various controls based on the operation signal. The receiving unit 90 corresponds to an example of an input device.

[0065] The remote control 700 transmits an operation signal to the receiving unit 90. When a user performs an input operation on any of a plurality of operation buttons 710 provided on the remote control 700, the remote control 700 transmits an operation signal to the receiving unit 90. The remote control 700 transmits an operation signal corresponding to each of the plurality of operation buttons 710 to the receiving unit 90.

[0066] FIG. 5 shows an example of a projection image PG including an OSD image 100. FIG. 5 shows a projection image PG projected on a projection surface SC. The projection image PG shown in FIG. 5 includes a first OSD image 100A. The first OSD image 100A is an example of the OSD image 100. The aspect ratio of the projection image PG shown in FIG. 5 is a:b. FIG. 5 shows a first measurement image 101A as the first OSD image 100A. The first measurement image 101A is an example of the measurement image 101. FIG. 5 shows a virtual horizontal line VH. The first measurement image 101A, which is the measurement image 101, is an image that prompts the user to measure the measurement image width MW of the first measurement image 101A. The user measures the measurement image width MW of the first measurement image 101A displayed on the projection image PG. The user inputs the measurement result of the measurement image width MW to the projector 10.

[0067] The first measurement image 101A is a line with a double-headed arrow. The first measurement image 101A is arranged parallel or approximately parallel to the Y axis. The first measurement image 101A is arranged parallel or approximately parallel to the long side of the projection image PG. The first measurement image 101A shown in FIG. 5 is displayed in the second region R2 of the projection image PG. The first measurement image 101A is a line with a double-headed arrow, but is not limited to this form. The form of the measurement image 101 may be any form that allows measurement of the length in a specified direction such as width or height.

[0068] The user measures the measurement image width MW of the first measurement image 101A on the projection surface SC, and inputs the measurement result to the projector 10. That is, the measurement image width MW of the first measurement image 101A currently projected on the projection surface SC is measured using a tape measure or the like. The measurement result is the length of the first measurement image 101A projected on the projection surface SC. The measurement image width MW is an example of the length of the first image projected on the projection surface SC. The measurement result of the measurement image width MW corresponds to an example of the second length. The user inputs the measurement result using the operation panel 11 or the remote control 700. The projector 10 acquires measurement data indicating the measurement result. The data processing unit 63 of the projector 10 calculates size data of the projection image PG using the measurement result. The data processing unit 63 calculates the diagonal length Y, which is an example of size data, using the following formula (1).

[0069]

number

[0070] Here, c is ratio data. When the measurement image 101 is the first measurement image 101A, a width ratio is used as the ratio data. X is a measurement value of the measurement image width MW input by the user. a and b are values ​​representing the aspect ratio. The data processing unit 63 can calculate the diagonal length Y by substituting the measurement data into equation (1). The data processing unit 63 outputs the diagonal length Y as size data to the OSD control unit 61, the image providing device 500, etc.

[0071] The data processing unit 63 may calculate the image width PW as the size data by multiplying the measured value of the measured image width MW measured by the user by the ratio data.

[0072] When the size data is input, the OSD control unit 61 adjusts the size of various images included in the OSD image 100. The OSD control unit 61 adjusts the size of the images in the OSD image 100 that are different from the first measurement image 101A based on the size data. The OSD control unit 61 adjusts the size of a projector setting image, for example. The projector setting image is displayed in the projection image PG as the OSD image 100. The projector setting image is a screen on which various setting values ​​related to the operation of the projector can be set. The user uses the projector setting image to adjust the contrast ratio, image color, resolution, and the like. By adjusting the size of the projector setting image based on the size data, the user can easily view the projector setting image. The size of the first measurement image 101A is maintained at the size before the size data is input.

[0073] When the size data is input, the image providing device 500 may correct the image data to be transmitted to the projector 10. The image providing device 500 corrects the image data using the size data. As an example, the image providing device 500 adjusts the size of a partial image included in the projection image PG displayed on the projection surface SC based on the image data. The partial image is an insert image showing a person's face or the like. By adjusting the size of the partial image, the image providing device 500 can display the partial image in the projection image PG at a size close to the actual size.

[0074] The position where the first measurement image 101A is displayed is adjusted as appropriate. The first measurement image 101A is preferably disposed in the second region R2. The second region R2 is the lower region when the projected image PG is horizontally divided into two equal parts. By displaying the first measurement image 101A in the second region R2, it becomes easier for the user to measure the measurement image width MW of the first measurement image 101A.

[0075] It is preferable that the first measurement image 101A is disposed in the lower region when the projected image PG is horizontally divided into two equal parts. By disposing the first test image 101A in the second region R2, the user can easily access the first test image 101A and measure the test image width MW of the first test image 101A.

[0076] FIG. 6 shows an example of a projection image PG including an OSD image 100. FIG. 6 shows a projection image PG projected on a projection surface SC. The projection image PG shown in FIG. 6 includes a second OSD image 100B. The second OSD image 100B is an example of the OSD image 100. The aspect ratio of the projection image PG shown in FIG. 6 is a:b. FIG. 6 shows a second measurement image 101B as the second OSD image 100B. The second measurement image 101B is an example of the measurement image 101. The second measurement image 101B is an image that prompts the user to measure the measurement image height MH of the second measurement image 101B. The user measures the measurement image height MH of the second measurement image 101B displayed on the projection surface SC. The measurement image height MH is an example of the length of the first image projected on the projection surface SC. The measurement result of the measurement image height MH corresponds to an example of the second length. The user inputs the measurement result of the measurement image height MH to the projector 10.

[0077] The second measurement image 101B is composed of a straight line parallel or approximately parallel to the Z axis and edge emphasis lines arranged on both ends of the straight line. The straight line of the second measurement image 101B is arranged parallel or approximately parallel to the short side of the projection image PG. The second measurement image 101B shown in FIG. 6 is displayed in an area closer to the outer edge of the projection image PG than to the center of the projection image PG.

[0078] The user measures the measurement image height MH of the second measurement image 101B and inputs the measurement result to the projector 10. The user inputs the measurement result using the operation panel 11 or the remote control 700. The projector 10 acquires measurement data indicating the measurement result. The data processing unit 63 of the projector 10 calculates size data of the projection image PG using the measurement result. The data processing unit 63 calculates the diagonal length Y, which is an example of size data, using equation (1). At this time, the height ratio is used as the ratio data. The measurement data, which is the measurement result of the measurement image height MH, is substituted for X in equation (1).

[0079] The data processing unit 63 may calculate the image height PH as size data by multiplying the measured value of the measured image height MH measured by the user by a height ratio as ratio data.

[0080] FIG. 7 shows an example of a projection image PG including an OSD image 100. FIG. 7 shows a projection image PG projected on a projection surface SC. The projection image PG shown in FIG. 7 includes a third OSD image 100C. The third OSD image 100C is an example of the OSD image 100. The aspect ratio of the projection image PG shown in FIG. 7 is a:b. FIG. 7 shows a third measurement image 101C as the third OSD image 100C. The third measurement image 101C is an example of the measurement image 101. The third measurement image 101C is an image that prompts the user to measure the measurement image length ML of the third measurement image 101C. The user measures the measurement image length ML of the third measurement image 101C displayed on the projection surface SC. The measurement image length ML is an example of the length of the first image projected on the projection surface SC. The measurement result of the measurement image length ML corresponds to an example of the second length. The measurement image width MW, the measurement image height MH, and the measurement image length ML are collectively referred to as the length of the measurement image 101. The user inputs the measurement result of the measurement image length ML to the projector 10.

[0081] The third measurement image 101C is a diagonal line with an inclination angle θ with respect to the virtual line VL. The virtual line VL is a virtual line parallel to the Y axis. The third measurement image 101C shown in FIG. 7 is disposed in the second region R2.

[0082] The user measures the measurement image length ML of the third measurement image 101C and inputs the measurement result to the projector 10. The user inputs the measurement result using the operation panel 11 or the remote control 700. The projector 10 acquires measurement data indicating the measurement result. The data processing unit 63 of the projector 10 calculates size data of the projection image PG using the measurement result. The data processing unit 63 calculates the Y-axis length of the measurement image length ML as an example. The Y-axis length is calculated using the measurement image length ML and the inclination angle θ. The data processing unit 63 calculates the diagonal length Y, which is an example of size data, using equation (1). At this time, the Y-axis length of the measurement image length ML is substituted for X. For the ratio data, a Y-axis length ratio, which is the ratio of the Y-axis length of the measurement image 101 to the image width PW of the projection image PG, is used.

[0083] The data processing unit 63 may calculate the image width PW as the size data. The image width PW is calculated by multiplying the Y-axis length of the measured image length ML measured by the user by the Y-axis length ratio.

[0084] The inclination of the third measurement image 101C may be set to be the same or approximately the same as the inclination of the diagonal of the projection image PG. When the inclination of the third measurement image 101C is the same as the inclination of the diagonal of the projection image PG, the diagonal length Y is calculated by multiplying the measurement image length ML by the diagonal ratio.

[0085] 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 shown in FIG. 8 includes a fourth OSD image 100D. The fourth OSD image 100D is an example of the OSD image 100. The aspect ratio of the projection image PG shown in FIG. 8 is a:b. FIG. 8 shows a fourth measurement image 101D as the fourth OSD image 100D. The fourth measurement image 101D is an example of the measurement image 101. The fourth measurement image 101D is an image that prompts the user to measure the measurement image width MW of the fourth measurement image 101D. The user measures the measurement image width MW of the fourth measurement image 101D displayed on the projection surface SC. The user inputs the measurement result of the measurement image width MW to the projector 10.

[0086] The fourth measurement image 101D is a rectangular image. The long side of the fourth measurement image 101D is arranged parallel or approximately parallel to the Y axis. The fourth measurement image 101D is arranged parallel or approximately parallel to the long side of the projection image PG.

[0087] The user measures the measurement image width MW of the fourth measurement image 101D and inputs the measurement result to the projector 10. The user inputs the measurement result using the operation panel 11 or the remote control 700. The projector 10 acquires measurement data indicating the measurement result. The data processing unit 63 of the projector 10 calculates size data of the projection image PG using the measurement data. The data processing unit 63 calculates the diagonal length Y, which is an example of size data, using equation (1).

[0088] The data processing unit 63 may calculate the image width PW as size data by multiplying the measured value of the measured image width MW measured by the user by the width ratio as ratio data.

[0089] FIG. 9 shows an example of a projection image PG including an OSD image 100. FIG. 9 shows a projection image PG projected on a projection surface SC. The projection image PG shown in FIG. 9 includes a fifth OSD image 100E. The fifth OSD image 100E is an example of an OSD image 100. The aspect ratio of the projection image PG shown in FIG. 9 is a:b. The fifth OSD image 100E includes a first measurement image 101A, a first message image 103A, an input value display icon 105, and an operation button icon 107. The first measurement image 101A is an image that prompts the user to measure the measurement image width MW of the first measurement image 101A. The user measures the measurement image width MW of the first measurement image 101A displayed on the projection surface SC. The user inputs the measurement result of the measurement image width MW to the projector 10.

[0090] The first measurement image 101A shown in Fig. 9 is the same as the first measurement image 101A shown in Fig. 5. The fifth OSD image 100E includes, but is not limited to, the first measurement image 101A. The fifth OSD image 100E may include, instead of the first measurement image 101A, the second measurement image 101B, the third measurement image 101C, or the fourth measurement image 101D.

[0091] The first message image 103A is an image that displays information to notify the user. The first message image 103A is an example of the message image 103. The first message image 103A is a message that prompts the user to measure the measurement image width MW of the first measurement image 101A. The first message image 103A represents the first measurement image 101A as a reference line. The text of the message image 103 is set appropriately.

[0092] The input value display icon 105 is an icon image that accepts the input of the input value 106. The input value display icon 105 accepts the input of the input value 106 when selected by the user. The user measures the measurement image width MW of the first measurement image 101A projected on the projection surface SC. The user inputs the measurement result of the measurement image width MW as the input value 106. The input value 106 corresponds to the second length. When the user operates a predetermined input button 13 in the operation panel 11 or a predetermined operation button 710 in the remote control 700, the input value display icon 105 is selected. The input value display icon 105 accepts the input of the input value 106 when in a selected state. When the user inputs the input value 106 using the operation button icon 107, the input value display icon 105 displays the input value 106. The fifth OSD image 100E accepts the input of the input value 106 via the operation button icon 107 and the input value display icon 105. The operation button icon 107 and the input value display icon 105 correspond to an example of a user interface image.

[0093] The operation button icons 107 are icon images that accept input or change of size data. The operation button icons 107 accept an input operation when selected by a user. The operation button icons 107 include, for example, a first operation button icon 107a and a second operation button icon 107b.

[0094] The first operation button icon 107a increases the input value 106 displayed on the input value display icon 105. The user increases the input value 106 by operating the first operation button icon 107a. Every time the first operation button icon 107a is operated by the user, the input value 106 increases by, for example, several centimeters. The amount of increase in the input value 106 is appropriately adjusted.

[0095] The second operation button icon 107b decreases the input value 106 displayed on the input value display icon 105. The user decreases the input value 106 by operating the second operation button icon 107b. Each time the second operation button icon 107b is operated by the user, the input value 106 decreases by, for example, several centimeters. The amount by which the input value 106 is decreased is adjusted appropriately. The user inputs the input value 106 using the first operation button icon 107a and the second operation button icon 107b.

[0096] The projection image PG further includes an input value display icon 105 that accepts the input of an input value 106 , and accepting the input of the input value 106 means accepting the input of the input value 106 via the input value display icon 105 . The user can easily understand that the input value 106 is to be input to the input value display icon 105 displayed on the projection image PG.

[0097] FIG. 10 shows an example of a projection image PG including an OSD image 100. FIG. 10 shows a projection image PG projected on a projection surface SC. The projection image PG shown in FIG. 10 includes a sixth OSD image 100F. The sixth OSD image 100F is an example of an OSD image 100. The aspect ratio of the projection image PG shown in FIG. 10 is a:b. The sixth OSD image 100F includes a first measurement image 101A, a second message image 103B, and an input value display icon 105. The sixth OSD image 100F is an image that prompts the user to measure the measurement image width MW of the first measurement image 101A. The user measures the measurement image width MW of the first measurement image 101A displayed on the projection surface SC. The user inputs the measurement result of the measurement image width MW to the projector 10.

[0098] The first measurement image 101A shown in Fig. 10 is the same as the first measurement image 101A shown in Fig. 5. The sixth OSD image 100F includes, but is not limited to, the first measurement image 101A. The sixth OSD image 100F may include, instead of the first measurement image 101A, the second measurement image 101B, the third measurement image 101C, or the fourth measurement image 101D.

[0099] The second message image 103B is an image that displays information to be notified to the user. The second message image 103B is an example of the message image 103. The second message image 103B is a message that prompts the user to input a measurement value obtained by measuring the measurement image width MW of the first measurement image 101A. The second message image 103B represents the first measurement image 101A as a reference line.

[0100] The input value display icon 105 is an icon image that accepts the input of the input value 106. The input value display icon 105 accepts the input of the input value 106 when selected by the user. When the user operates a predetermined input button 13 in the operation panel 11 or a predetermined operation button 710 in the remote control 700, the input value display icon 105 is selected. The input value display icon 105 accepts the input of the input value 106 when in a selected state. The user inputs a numerical value into the operation panel 11 or the remote control 700. At this time, an input button 13 for inputting a numerical value is provided among the multiple input buttons 13. Or, an operation button 710 for inputting a numerical value is provided among the multiple operation buttons 710. When the user inputs the input value 106 using the operation panel 11 or the remote control 700, the input value display icon 105 displays the input value 106. The sixth OSD image 100F accepts the input of the input value 106 via the input value display icon 105.

[0101] FIG. 11 shows an example of a projection image PG including an OSD image 100. FIG. 11 shows a projection image PG projected on a projection surface SC. The projection image PG shown in FIG. 11 includes a seventh OSD image 100G. The seventh OSD image 100G is an example of an OSD image 100. The aspect ratio of the projection image PG shown in FIG. 11 is a:b. The seventh OSD image 100G includes a first measurement image 101A, an input value display icon 105, and an output value display icon 109. The seventh OSD image 100G may display a message image 103, an operation button icon 107, and the like. The seventh OSD image 100G is an image that prompts the user to measure the measurement image width MW of the first measurement image 101A. The user measures the measurement image width MW of the first measurement image 101A displayed on the projection surface SC. The user inputs the measurement result of the measurement image width MW to the projector 10.

[0102] The first measurement image 101A shown in Fig. 11 is the same as the first measurement image 101A shown in Fig. 5. The seventh OSD image 100G includes, but is not limited to, the first measurement image 101A. The seventh OSD image 100G may include, instead of the first measurement image 101A, the second measurement image 101B, the third measurement image 101C, or the fourth measurement image 101D.

[0103] The input value display icon 105 shown in Fig. 11 is the same as the input value display icon 105 shown in Fig. 10. The input value display icon 105 shown in Fig. 11 displays an input value 106. The input value 106 is input by the user.

[0104] The output value display icon 109 displays an output value 110 representing size data. The output value display icon 109 shown in FIG. 11 displays a first output value 110A. The first output value 110A is an example of the output value 110. The output value 110 corresponds to an example of a second image. The first output value 110A is output from the data processing unit 63. The data processing unit 63 calculates size data based on the input value 106 input to the input value display icon 105. The data processing unit 63 displays the size data as the first output value 110A in the projection image PG. When the data processing unit 63 outputs the size data, the projector 10 projects the projection image PG including the first output value 110A onto the projection surface SC using the image projection device 30. The output value display icon 109 displays the first output value 110A based on the input value 106.

[0105] The first output value 110A shown in FIG. 11 indicates the diagonal length Y, which is an example of size data, in inches. The first output value 110A is not limited to the diagonal length Y. The first output value 110A may be any value that indicates the size of the projected image PG, such as the image width PW and the image height PH. The first output value 110A indicates the diagonal length Y in inches, but is not limited to this. The first output value 110A may be displayed in centimeters. The seventh OSD image 100G preferably indicates the unit of the first output value 110A.

[0106] FIG. 12 shows an example of a projection image PG including an OSD image 100. FIG. 12 shows a projection image PG projected on a projection surface SC. The projection image PG shown in FIG. 12 includes an eighth OSD image 100H. The eighth OSD image 100H is an example of an OSD image 100. The aspect ratio of the projection image PG shown in FIG. 12 is a:b. The eighth OSD image 100H includes a first measurement image 101A, an input value display icon 105, and an output value display icon 109. The eighth OSD image 100H may display a message image 103, an operation button icon 107, and the like. The eighth OSD image 100H is an image that prompts the user to measure the measurement image width MW of the first measurement image 101A. The user measures the measurement image width MW of the first measurement image 101A displayed on the projection surface SC. The user inputs the measurement result of the measurement image width MW to the projector 10.

[0107] The first measurement image 101A shown in Fig. 12 is the same as the first measurement image 101A shown in Fig. 5. The eighth OSD image 100H includes, but is not limited to, the first measurement image 101A. The eighth OSD image 100H may include, instead of the first measurement image 101A, the second measurement image 101B, the third measurement image 101C, or the fourth measurement image 101D.

[0108] The input value display icon 105 shown in Fig. 12 is the same as the input value display icon 105 shown in Fig. 10. The input value display icon 105 shown in Fig. 12 displays an input value 106. The input value 106 is input by the user.

[0109] The output value display icon 109 shown in FIG. 12 displays the output value 110 in a different manner from the output value display icon 109 shown in FIG. 11. The output value display icon 109 shown in FIG. 12 displays the second output value 110B. The second output value 110B is an example of the output value 110. The second output value 110B indicates the size data as "large". The data processing unit 63 calculates the size data based on the input value 106 input to the input value display icon 105. The data processing unit 63 classifies the size data into three groups as an example, and outputs the classification result as the second output value 110B. The three groups are a large size group, a medium size group, and a small size group. The OSD control unit 61 outputs a term representing the group as the size data. The number of groups classified by the data processing unit 63 is not limited to three. The number of groups may be two or more.

[0110] Outputting the size data includes projecting, using an image projection device 30, output values ​​110 that represent the size data onto a projection surface SC. The user can check the size of the projection image PG projected onto the projection surface SC.

[0111] 13 and 14 show an example of a projection image PG including an OSD image 100. FIG. 13 and FIG. 14 show a projection image PG projected on a projection surface SC. The projection image PG shown in FIG. 13 and FIG. 14 includes a ninth OSD image 100I. The ninth OSD image 100I is an example of an OSD image 100. The aspect ratio of the projection image PG shown in FIG. 13 and FIG. 14 is a:b. The ninth OSD image 100I includes a first measurement image 101A and a position operation icon 111. The ninth OSD image 100I may display a message image 103, an input value display icon 105, an operation button icon 107, an output value display icon 109, and the like. The ninth OSD image 100I is an image that prompts the user to measure the measurement image width MW of the first measurement image 101A. Fig. 13 shows the ninth OSD image 100I before the user performs a position change operation on the first measurement image 101A. Fig. 14 shows the ninth OSD image 100I after the user performs a position change operation on the first measurement image 101A. The position change operation corresponds to an example of a change operation.

[0112] The position operation icon 111 is an icon image showing some of the input buttons 13 provided on the operation panel 11. The position operation icon 111 may be an icon image showing some of the operation buttons 710 provided on the remote control 700. The position operation icon 111 includes a plurality of direction instruction button icons 113 and a decision button icon 115. Each of the direction instruction button icons 113 corresponds to the input button 13. Alternatively, each of the direction instruction button icons 113 corresponds to the operation button 710. The position operation icon 111 is an example of a user interface image that accepts a change operation to change the projection position of the first measurement image 101A.

[0113] The direction instruction button icon 113 indicates the moving direction of the first measurement image 101A. Among the multiple direction instruction button icons 113, the first direction instruction button icon 113A indicates the +Y direction as the moving direction. When the user inputs a position change operation to the input button 13 corresponding to the first direction instruction button icon 113A, the OSD control unit 61 moves the first measurement image 101A in the +Y direction. Alternatively, when the user inputs a position change operation to the operation button 710 corresponding to the first direction instruction button icon 113A, the OSD control unit 61 moves the first measurement image 101A in the +Y direction. When the user inputs a position change operation to the input button 13 corresponding to a direction instruction button icon 113 different from the first direction instruction button icon 113A, the OSD control unit 61 moves the first measurement image 101A in the direction corresponding to the direction instruction button icon 113. The operation panel 11 or the remote control 700 accepts the position change operation. The OSD control unit 61 changes the projection position of the first measurement image 101A based on the position change operation.

[0114] The decision button icon 115 is an icon image corresponding to the decision button among the multiple input buttons 13 provided on the operation panel 11. Alternatively, the decision button icon 115 is an icon image corresponding to the operation decision button among the multiple operation buttons 710 provided on the remote control 700. The decision button and the operation decision button are not shown. When the user performs an operation input to the decision button or the operation decision button, the projection position of the first measurement image 101A is confirmed.

[0115] Fig. 14 shows a state when a user inputs a position change operation to the input button 13 or the operation button 710 corresponding to the first direction instruction button icon 113A. The first direction instruction button icon 113A shown in Fig. 14 is displayed in a display mode different from that of the other direction instruction button icons 113. The different display mode of the first direction instruction button icon 113A allows the user to confirm the indicated direction. As shown in Fig. 14, the projection position of the first measurement image 101A moves in the +Y direction based on the position change operation by the user.

[0116] The projector 10 includes an operation panel 11 that accepts a position change operation for changing the projection position of the first measurement image 101A, or a remote control 700. The control unit 60 changes the projection position of the first measurement image 101A based on the position change operation. The user can change the projection position of the first test image 101A to a position where it is easy to measure the test image width MW of the first test image 101A.

[0117] 15 shows a control flow executed by the projector 10 and a user. The control flow executed by the projector 10 corresponds to an example of a control method of the projector 10. The control flow executed by the projector 10 is executed by the control unit 60 operating the control program CP.

[0118] In step S101, the projector 10 displays a measurement image 101. The measurement 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 10 projects a first measurement image 101A as the measurement image 101. The first measurement image 101A is an image with a measurement image width MW of a predetermined width ratio with respect to an image width PW of the projection image PG. The width ratio is an example of ratio data, and is determined in advance and is considered to be known.

[0119] After the projector 10 displays the test image 101, the user measures the size of the test image 101 in step S201. The size of the test image 101 is any one of the test image width MW, the test image height MH, and the test image length ML. When the projector 10 projects the first test image 101A as the test image 101, the user measures the test image width MW of the test image 101.

[0120] After the user measures the size of the test image 101, in step S203, the user inputs the measurement result to the projector 10. The user inputs the measurement result of the size of the test image 101 as a measurement value. The user inputs the measurement result to the projector 10 using the operation panel 11 or the remote control 700. When the projector 10 projects the first test image 101A as an example, the user inputs the measurement result of the test image width MW as a measurement value.

[0121] When the user inputs the measurement result to the projector 10, the projector 10 accepts the measurement result in step S103. The operation panel 11 or the receiving unit 90 accepts the measurement value as the measurement result. When the user inputs the measurement value using the remote control 700, the receiving unit 90 accepts the measurement value as an operation signal.

[0122] After receiving the measurement values, the projector 10 calculates size data in step S105. The data processing unit 63 of the projector 10 acquires the measurement values. The data processing unit 63 calculates size data of the projection image PG projected onto the projection surface SC based on the measurement values ​​and the ratio data. The ratio data is stored in advance in the memory 70. When the measurement value is the measured image width MW, the data processing unit 63 calculates the size data based on the measurement value and the width ratio. The calculated size data is, for example, the diagonal length Y.

[0123] After calculating the size data, the projector 10 outputs the size data in step S107. As an example, the data processing unit 63 outputs the size data to the OSD control unit 61. The OSD control unit 61 acquires the size data. The OSD control unit 61 projects an output value 110 indicating the size data into the OSD image 100. The output value 110 is projected into the projection image PG. The projector 10 projects the output value 110 onto the projection surface SC. The OSD control unit 61 may adjust the size of an image displayed in the OSD image 100 other than the measurement image 101 based on the size data.

[0124] The data processing unit 63 may transmit the size data to an external device such as the image providing device 500 via the communication interface 80. The image providing device 500 acquires the size data. The image providing device 500 corrects the image data based on the size data. The image providing device 500 adjusts the size of a partial image included in the projection image PG projected on the projection surface SC by correcting the image data.

[0125] The projector 10 includes an image projection device 30 and a control unit 60. The control unit 60 executes the following: projecting image light of a projection image PG having an image size, including a measurement image 101 whose ratio data with respect to the image size is known, onto a projection surface SC using the image projection device 30; accepting an input of an input value 106 which is the length of the measurement image 101 on the projection surface SC; and outputting size data which is the length of the projection image PG on the projection surface SC based on the input value 106 and the ratio data. The projector 10 can calculate the image size of the projection image PG projected onto the projection surface SC by receiving the input value 106 input by the user. The projector 10 does not need to include a distance measuring sensor in order to calculate the image size of the projection image PG. This prevents the manufacturing cost of the projector 10 from increasing.

[0126] The control method for the projector 10 includes projecting image light of a projection image PG having an image size, including a measurement image 101 whose ratio data with respect to the image size is known, onto a projection surface SC from the projector 10, accepting input of an input value 106 which is the length of the measurement image 101 on the projection surface SC, and outputting size data which is the length of the projection image PG on the projection surface SC based on the input value 106 and the ratio data. The projector 10 is able to output size data without using a distance measuring sensor. The projector 10 does not need to include a distance measuring sensor for calculating size data. The manufacturing cost of the projector 10 is reduced.

[0127] The control program CP causes the projector 10 to project image light of a projection image PG having an image size, including a measurement image 101 whose ratio data with respect to the image size is known, onto a projection surface SC from the projector 10, to accept input of an input value 106 which is the length of the measurement image 101 on the projection surface SC, and to output size data which is the length of the projection image PG on the projection surface SC based on the input value 106 and the ratio data. The control program CP can provide the projector 10 capable of outputting size data without increasing the manufacturing cost of the projector 10.

[0128] The following is a summary of this disclosure. Appendix 1 The projector of the present disclosure includes an optical device and a processing device, and the processing device includes a first image having a known length relationship to a first length, and projects image light of the projection image having the first length onto a projection surface using the optical device, accepts input of a second length that is the length of the first image on the projection surface, and outputs information indicating a third length that is the length of the projection image on the projection surface based on the second length and the length relationship. The projector can calculate the length of the projection image projected onto the projection surface by receiving the second length input by the user. The projector does not need to include a distance measuring sensor to calculate the image length of the projection image. This prevents the manufacturing cost of the projector from increasing.

[0129] Appendix 2 A projector as described in Appendix 1, wherein the projection image further includes a user interface image that accepts input of the second length, and accepting the input of the second length means accepting the input of the second length via the user interface image. The user can easily understand how to input the second length in the user interface image displayed on the projected image.

[0130] Appendix 3 In the projector according to Supplementary Note 1 or 2, the first image is disposed in a lower area when the projected image is horizontally divided into two equal parts. By arranging the first image below the projected image when it is horizontally divided into two equal parts, the user can easily access the first image and measure the length of the first image.

[0131] Appendix 4 The projector described in any one of Supplementary Notes 1 to 3 further includes an input device that accepts a change operation to change the projection position of the first image, and the processing device changes the projection position of the first image based on the change operation. The user can change the projection position of the measurement image to a position where it is easy to measure the first image.

[0132] Appendix 5 A projector described in any one of Supplementary Notes 1 to 4, wherein outputting the information indicating the third length includes projecting a second image representing the information indicating the third length onto the projection surface using the optical device. The user can check the size of the image projected onto the projection surface.

[0133] Appendix 6 The projector control method disclosed herein includes projecting image light of a projection image having a first length, the projection image including a first image whose length relationship to a first length is known, onto a projection surface from a projector, accepting input of a second length which is the length of the first image on the projection surface, and outputting information indicating a third length which is the length of the projection image on the projection surface based on the second length and the length relationship. The projector is capable of outputting the information indicating the third length without using a distance measuring sensor. The projector does not need to include a distance measuring sensor for calculating the information indicating the third length. This reduces the manufacturing cost of the projector.

[0134] Appendix 7 The program disclosed herein causes a projector to project image light of a projection image having a first length, the projection image including a first image whose length relationship to a first length is known, onto a projection surface from the projector, accept input of a second length which is the length of the first image on the projection surface, and output information indicating a third length which is the length of the projection image on the projection surface based on the second length and the length relationship. The program can provide a projector capable of outputting size data without increasing the manufacturing cost of the projector. [Explanation of symbols]

[0135] 1...projection system, 10...projector, 11...operation panel, 13...input button, 20...exterior housing, 30...image projection device, 31...light source unit, 32...uniformization optical system, 33...color separation optical system, 34...relay optical system, 35...image formation unit, 36...housing for optical components, 37...projection optical unit, 50...power supply unit, 60...control unit, 61...OSD control unit, 63...data processing unit, 65...image control unit, 70...memory, 71...OSD data, 80...communication interface, 90...receiving unit, 100...OSD image, 100A...first OSD image, 100B...second OSD image 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, 100I...ninth OSD image, 101...measurement image, 101A...first measurement image, 101B...second measurement image, 101C...third measurement image, 101D...fourth measurement image, 103...message image, 103A...first message image, 103B...second message image, 105...input value display icon, 106...input value, 107...operation button icon, 107a...first operation button icon, 1 07b...second operation button icon, 109...output value display icon, 110...output value, 110A...first output value, 110B...second output value, 111...position operation icon, 113...direction instruction button icon, 113A...first direction instruction button icon, 115...determination button icon, 321...first lens array, 322...second lens array, 323...polarization conversion element, 324...superimposing lens, 331...first dichroic mirror, 332...second dichroic mirror, 333...first reflecting mirror, 341...entrance side lens, 342...second reflecting mirror, 343...relay lens, 3 44...Third reflecting mirror, 351...Field lens, 352...Incoming polarizing plate, 353...Transmissive liquid crystal panel, 353B...Blue light transmissive liquid crystal panel, 353G...Green light transmissive liquid crystal panel, 353R...Red light transmissive liquid crystal panel, 355...Color synthesis optical system, 356...Light path shift module, 371...Lens barrel, 500...Image providing device, 700...Remote control, 710...Operation button, Ax...Optical axis, CP...Control program, MH...Measured image height, ML...Measured image length, MW...Measured image width, PG...Projected image, PH...Image height, PW...Image width, R1...First region, R2...Second region,SC: projection surface, VH: virtual horizontal line, VL: virtual line, Y: diagonal length, θ: tilt angle.

Claims

1. An optical device; a processing device; The processing device includes: projecting image light of a projection image having a first length, the first image including a first image having a known length relationship to a first length, onto a projection surface using the optical device; receiving an input of a second length, the second length being a length of the first image on the projection surface; outputting information indicating a third length, which is a length of the projected image on the projection surface, based on the second length and the length relationship; A projector that runs

2. the projected image further includes a user interface image that accepts an input of the second length; accepting an input of the second length includes accepting an input of the second length via the user interface image. The projector according to claim 1 .

3. the first image is disposed in a lower region when the projected image is horizontally divided into two equal parts; The projector according to claim 1 or 2.

4. an input device that receives a change operation for changing a projection position of the first image; the processing device changes the projection position of the first image based on the change operation. The projector according to claim 1 or 2.

5. outputting the information indicating the third length includes projecting a second image representing the information indicating the third length onto the projection surface using the optical device. The projector according to claim 1 or 2.

6. projecting image light of a projection image having a first length, the first image including a first image having a known length relationship with respect to a first length, from a projector onto a projection surface; receiving an input of a second length, the second length being a length of the first image on the projection surface; outputting information indicating a third length, which is a length of the projected image on the projection surface, based on the second length and the length relationship; A method for controlling a projector including:

7. On the projector, projecting image light of a projection image having a first length, the first image including a first image having a known length relationship with respect to a first length, onto a projection surface; accepting an input of a second length, which is a length of the first image on the projection surface; outputting information indicating a third length, which is a length of the projected image on the projection surface, based on the second length and the length relationship; A program that executes the following.

Images