Projection method and projector

Abstract

To display a projection image with a high degree of freedom on a projection surface.SOLUTION: A projection method includes: detecting a first distance L1 between a projector 200 and a first portion Q1 of a projection surface PS; detecting a second distance L2 between the projector 200 and a second portion Q2 of the projection surface PS; detecting a third distance L3 between the projector 200 and a third portion Q3 of the projection surface PS; the projector 200 projecting image light PL in a first mode AP1 according to the first distance L1 at the first portion Q1; the projector 200 projecting image light PL in a second mode AP2 according to the second distance L2 at the second portion Q2; and when the third distance L3 is larger than the first distance L1 and smaller than the second distance L2, the projector 200 projecting image light PL in a third mode AP3 based on the first mode AP1 and the second mode AP2 at the third portion Q3.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention relates to a projection method and a projector. [Background technology]

[0002] Techniques for projecting various images using a projector have been disclosed. For example, the image projection system described in Patent Document 1 includes a depth camera that recognizes in three dimensions the area of ​​an object that exists in front of the background onto which the image is projected, and a projector that outputs predetermined data to or outside the recognized area. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-14075 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the image projection system described in Patent Document 1, there is room for increasing the degree of freedom of the image projected onto the projection surface. [Means for solving the problem]

[0005] A projection method according to one aspect of this application example includes detecting a first distance between a projector and a first portion of a projection surface, detecting a second distance between the projector and a second portion of the projection surface, detecting a third distance between the projector and a third portion of the projection surface, projecting, by the projector, image light of a first aspect corresponding to the first distance onto the first portion, projecting, by the projector, image light of a second aspect corresponding to the second distance onto the second portion, and, when the third distance is greater than the first distance and less than the second distance, projecting, by the projector, image light of a third aspect based on the first aspect and the second aspect onto the third portion.

[0006] According to another aspect of this application example, there is provided a projector including a light source, a light modulation device that modulates light emitted from the light source, a distance sensor, and a control unit, wherein the control unit uses the distance sensor to detect a first distance between the projector and a first portion of a projection surface, uses the distance sensor to detect a second distance between the projector and a second portion of the projection surface, and uses the distance sensor to detect a third distance between the projector and a third portion of the projection surface, uses the light source and the light modulation device to project image light of a first aspect corresponding to the first distance onto the first portion, uses the light source and the light modulation device to project image light of a second aspect corresponding to the second distance onto the second portion, and uses the light source and the light modulation device to project image light of a third aspect based on the first aspect and the second aspect onto the third portion when the third distance is greater than the first distance and less than the second distance. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 2 is a perspective view showing an example of a projected image according to the embodiment. [Figure 2] FIG. 1 is a diagram showing an example of the configuration of a projector according to the present embodiment. [Figure 3] FIG. 2 is a plan view showing an example of a reference surface and a projection surface. [Figure 4] FIG. 10 is a screen diagram showing an example of a display mode setting screen. [Figure 5] FIG. 10 is a screen diagram showing an example of a display mode setting screen. [Figure 6] FIG. 10 is a screen diagram showing an example of a display mode setting screen. [Figure 7] 10 is a flowchart showing an example of processing by a control unit. [Figure 8] FIG. 10 is a plan view showing another example of the reference surface. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, an embodiment will be described with reference to the drawings.

[0009] First, with reference to FIG. 1, a projected image projected onto a projection surface PS by a projector 200 according to this embodiment will be described. FIG. 1 shows an X-axis, a Y-axis, and a Z-axis that are perpendicular to each other. The Z-axis is parallel to the vertical direction, and each of the X-axis and Y-axis is parallel to the horizontal direction. In FIG. 1, the projection surface PS is parallel to the Z-axis. When standing facing the projection surface PS, the X-axis indicates the left-right direction, and the Y-axis indicates the front-back direction. The positive direction of the X-axis indicates the right direction, the positive direction of the Z-axis indicates the upward direction, and the positive direction of the Y-axis indicates the forward direction. Projector 200 is disposed in the negative direction of the Y axis with respect to projection surface PS. The configuration of projector 200 will be described with reference to Fig. 2. The arrangement of projector 200 will be described with reference to Fig. 3.

[0010] FIG. 1 is a perspective view showing an example of a projected image according to this embodiment. The projection surfaces PS include a first projection surface PS1, a second projection surface PS2, a third projection surface PS3, a fourth projection surface PS4, a fifth projection surface PS5, and a sixth projection surface PS6. The image light PL from the projector 200 is projected onto the first projection surface PS1 to the sixth projection surface PS6, and projected images are displayed on the first projection surface PS1 to the sixth projection surface PS6.

[0011] The first projection surface PS1 is a surface of the first object BJ1 facing in the negative direction of the Y axis. The first object BJ1 is composed of a first member BJ11 and a second member BJ12. Each of the first member BJ11 and the second member BJ12 is a rectangular, flat-plate member. The right end of the first member BJ11 is joined to the left end of the second member BJ12. As will be described with reference to FIG. 3, the first member BJ11 and the second member BJ12 are disposed symmetrically with respect to the projection axis LC of the image light PL of the projector 200. The first projection surface PS1 is made up of projection surface PS11 and projection surface PS12. Projection surface PS11 is the surface of the first member BJ11 facing in the negative direction of the Y axis. Projection surface PS12 is the surface of the second member BJ12 facing in the negative direction of the Y axis. Projection surface PS11 is a plane parallel to the Z axis, and is disposed so that its right side is inclined far from the XZ plane. Projection surface PS12 is a plane parallel to the Z axis, and is disposed so that its left side is inclined far from the XZ plane.

[0012] The first projection surface PS1 includes a first portion Q1 and a second portion Q2. The first portion Q1 is disposed at the left and right edge positions of the first projection surface PS1. The distance L between the first portion Q1 and the projector 200 is a first distance L1. The second portion Q2 is disposed at the center position in the left-right direction of the first projection surface PS1. The distance L between the second portion Q2 and the projector 200 is a second distance L2. The distance L will be described with reference to FIG.

[0013] The second projection surface PS2 indicates the surface of the second object BJ2 ​​facing in the negative direction of the Y axis. The second object BJ2 ​​is cylindrical and is disposed with its central axis parallel to the Z axis. The second object BJ2 ​​is disposed in the negative direction of the Y axis relative to the first object BJ1.

[0014] The third projection surface PS3 indicates the surface of the third object BJ3 facing in the negative direction of the Y axis, and the fourth projection surface PS4 indicates the surface of the fourth object BJ4 facing in the negative direction of the Y axis. Each of the third object BJ3 and the fourth object BJ4 is cubic and is arranged so that one of its six faces faces in the negative direction of the Y axis. Furthermore, each of the third object BJ3 and the fourth object BJ4 is arranged in the negative direction of the Y axis relative to the first object BJ1 and the second object BJ2. Each of the third projection surface PS3 and the fourth projection surface PS4 includes a third portion Q3. The distance L between the third portion Q3 and the projector 200 is a third distance L3. The third distance L3 is greater than the first distance L1 and less than the second distance L2. Note that the third portion Q3 and the third distance L3 in Figure 1 are examples. The third distance L3 is the distance L at any position on the projection surface PS between the first distance L1 and the second distance L2.

[0015] The fifth projection screen PS5 indicates the surface of the fifth object BJ5 facing in the negative direction of the Y axis, and the sixth projection screen PS6 indicates the surface of the sixth object BJ6 facing in the negative direction of the Y axis. Each of the fifth object BJ5 and the sixth object BJ6 has a spherical shape. Each of the fifth object BJ5 and the sixth object BJ6 is disposed in the negative direction of the Y axis relative to the first object BJ1 to the fourth object BJ4.

[0016] The bottom of Fig. 1 shows a first setting result display unit CSA that indicates the relationship between the distance L and the state of the image light PL projected by the projector 200. Note that the first setting result display unit CSA is not an object that is placed in the same space as the projection surface PS, and is shown in Fig. 1 for the sake of convenience. The first setting result display unit CSA has a rectangular shape that extends in the left-right direction. The left-right direction of the first setting result display unit CSA indicates the distance L, with the distance L increasing toward the right. The leftmost position of the first setting result display section CSA corresponds to the first distance L1, and the rightmost position of the first setting result display section CSA corresponds to the second distance L2. In FIG. 1, as shown in the first setting result display area CSA, the first distance L1 corresponds to the first color CL1, and the second distance L2 corresponds to the second color CL2. The third distance L3 corresponds to the intermediate color CL3 between the first color CL1 and the second color CL2. In FIG. 1, the first color CL1 is black, the second color CL2 is white, and the intermediate color CL3 is gray. Also, as shown in the first setting result display area CSA, the greater the distance L, the greater the brightness.

[0017] The first color CL1 corresponds to an example of the first aspect AP1, the second color CL2 corresponds to an example of the second aspect AP2, and the neutral color CL3 corresponds to an example of the third aspect AP3. For example, when the brightness B is expressed in 256 gradations, the brightness value B1 of black corresponding to the first distance L1 is "0," and the brightness value B2 of white corresponding to the second distance L2 is "255." The brightness value B corresponding to the distance L is expressed by the following formula (1). B=((L-L1) / (L2-L1))×255 (1) For example, the luminance value B3 corresponding to the third distance L3 is expressed by the following equation (2). B3=((L3-L1) / (L2-L1))×255 (2)

[0018] As shown in the first setting result display unit CSA, the state of the image light PL can be determined according to the distance L, so that a projection image can be displayed on the projection surface PS with a high degree of freedom compared to, for example, displaying an image on an object or an area other than the object. The setting method of the first setting result display section CSA will be described with reference to FIGS.

[0019] Fig. 2 is a diagram showing an example of the configuration of a projector 200 according to this embodiment. The projector 200 projects image light PL toward a projection surface PS and displays a projected image on the projection surface PS. For convenience, Fig. 2 depicts the projection surface PS as a flat surface. 2, the projector 200 includes a projection unit 210 and a drive unit 220 that drives the projection unit 210. The projection unit 210 forms an optical image and projects the image onto a projection surface PS. The projection unit 210 includes a light source unit 211, a light modulation device 212, and a projection optical system 213. The drive unit 220 includes a light source drive unit 221 and a light modulation device drive unit 222.

[0020] The light source unit 211 includes a light source, such as a lamp light source such as a halogen lamp, a xenon lamp, or an ultra-high pressure mercury lamp, or a solid-state light source such as an LED (Light Emitting Diode) or a laser light source. The light source unit 211 may also include a reflector and an auxiliary reflector that guide the light emitted from the light source to the light modulation device 212. Furthermore, the light source unit 211 may also include a group of lenses for improving the optical characteristics of the projection light, a polarizing plate, or a dimming element that reduces the amount of light emitted from the light source on the path leading to the light modulation device 212. The light source driving unit 221 is connected to the internal bus 207 and turns on and off the light source of the light source unit 211 in accordance with instructions from the control unit 250 which is also connected to the internal bus 207 .

[0021] The light modulation device 212 includes, for example, three liquid crystal panels 215 corresponding to the three primary colors of R, G, and B. R indicates red, G indicates green, and B indicates blue. That is, the light modulation device 212 includes a liquid crystal panel 215 corresponding to R light, a liquid crystal panel 215 corresponding to G light, and a liquid crystal panel 215 corresponding to B light. The light emitted by the light source unit 211 is separated into three color lights of RGB, and each color light is incident on a corresponding liquid crystal panel 215. Each of the three liquid crystal panels 215 is a transmissive liquid crystal panel, and modulates the light that passes through it to generate image light PL. The image light PL that has passed through each liquid crystal panel 215 and been modulated is combined by a combining optical system such as a cross dichroic prism, and is emitted to the projection optical system 213. In this embodiment, the light modulation device 212 is described as having a transmissive liquid crystal panel 215 as a light modulation element, but is not limited to this. The light modulation element may be a reflective liquid crystal panel or a digital micromirror device.

[0022] The light modulation device 212 is driven by a light modulation device driving section 222. The light modulation device driving section 222 is connected to the image processing section 245. Image data corresponding to each of the primary colors R, G, and B is input to the light modulation device driving unit 222 from the image processing unit 245. The light modulation device driving unit 222 can be configured, for example, by an integrated circuit. The light modulation device driving unit 222 converts the input image data into a data signal suitable for operation of the liquid crystal panel 215. Based on the converted data signal, the light modulation device driving unit 222 applies a voltage to each pixel of each liquid crystal panel 215, and draws an image on each liquid crystal panel 215.

[0023] The projection optical system 213 includes lenses, mirrors, etc. that form an image of the incident image light PL on the projection surface PS. The projection optical system 213 may also include a zoom mechanism that enlarges or reduces the image projected onto the projection surface PS, a focus adjustment mechanism that adjusts the focus, etc.

[0024] The projector 200 further includes an operation unit 231, a remote control communication unit 233, an input interface 235, a storage unit 237, an interface 241, a distance sensor 242, a frame memory 243, an image processing unit 245, and a control unit 250. The input interface 235, the storage unit 237, the interface 241, the distance sensor 242, the image processing unit 245, and the control unit 250 are connected to each other via an internal bus 207 so as to be able to communicate data with each other.

[0025] The operation unit 231 includes various buttons and switches provided on the surface of the housing of the projector 200, generates operation signals corresponding to the operation of these buttons and switches, and outputs the operation signals to the input interface 235. The input interface 235 includes a circuit that outputs the operation signals input from the operation unit 231 to the control unit 250.

[0026] The remote control communication unit 233 performs infrared communication or short-distance wireless communication with the remote control 5. The remote control 5 includes a touch panel 51 and various operation keys 52. The touch panel 51 includes an LCD (Liquid Crystal Display) and a touch sensor. The LCD displays various images including a display mode setting screen 300, a display mode setting screen 400, and a display mode setting screen 500 shown in FIGS. The remote controller 5 receives a communication signal from the remote controller communication unit 233, decodes the communication signal into an image signal, and displays an image corresponding to the image signal on the LCD of the touch panel 51. The touch sensor is formed integrally with the display surface of the LCD and receives touch operations from the user. Operation keys 52 also receive operations from the user. The remote controller 5 encodes operation signals corresponding to operations received by the touch sensors of the touch panel 51 and the operation keys 52 into communication signals and transmits the signals to the remote controller communication unit 233 .

[0027] In this embodiment, the remote control 5 displays various images including the display mode setting screen 300, the display mode setting screen 400, and the display mode setting screen 500 shown in Figures 4 to 6, and the projector 200 accepts the display mode setting from the remote control 5, but is not limited to this. For example, the information processing device 100 may display various images including the display mode setting screen 300, the display mode setting screen 400, and the display mode setting screen 500 shown in Figures 4 to 6, and the projector 200 may accept the setting of the display mode from the information processing device 100. Also, for example, the operation unit 231 may display various images including the display mode setting screen 300, the display mode setting screen 400, and the display mode setting screen 500 shown in Figures 4 to 6, and the projector 200 may accept the setting of the display mode from the operation unit 231.

[0028] The remote control communication unit 233 receives, for example, an infrared signal transmitted from the remote control 5, and decodes the received infrared signal to generate an operation signal. The remote control communication unit 233 outputs the generated operation signal to the input interface 235. The input interface 235 outputs the operation signal input from the remote control communication unit 233 to the control unit 250. Furthermore, the remote control communication unit 233 transmits various images to the remote control 5, for example, in accordance with instructions from the control unit 250. The remote control communication unit 233 encodes the image signal input from the control unit 250 to generate an infrared signal. The remote control communication unit 233 transmits the generated infrared signal to the remote control 5.

[0029] The storage unit 237 is, for example, a magnetic recording device such as a hard disk drive (HDD) or a storage device using a semiconductor storage element such as a flash memory. The storage unit 237 stores programs executed by the control unit 250, data processed by the control unit 250, image data, etc.

[0030] The interface 241 is a communication interface that communicates with the information processing device 100 in accordance with, for example, the Ethernet (registered trademark) standard. The interface 241 includes a connector for connecting an Ethernet (registered trademark) cable and an interface circuit for processing signals transmitted through the connector. The interface 241 is an interface board having a connector and an interface circuit, and is connected to a main board on which the processor 253 and the like of the control unit 250 are mounted. Alternatively, the connector and interface circuit that constitute the interface 241 are mounted on the main board of the control unit 250. The interface 241 receives, for example, various setting information and various instruction information from the information processing device 100.

[0031] The information processing device 100 is configured by, for example, a personal computer, and transmits various setting information and various instruction information to the projector 200. The image display system 1 according to this embodiment includes an information processing device 100 and a projector 200.

[0032] The distance sensor 242 is, for example, an ultrasonic sensor. The distance sensor 242 detects the distance LA between the projector 200 and the projection surface PS. Specifically, the distance sensor 242 detects the distance LA between the distance sensor 242 and any part of the projection surface PS. The distance sensor 242 outputs information indicating the detected distance LA to the control unit 250. In this embodiment, a case will be described in which the distance sensor 242 is an ultrasonic sensor, but this is not limiting. The distance sensor 242 may be, for example, a light sensor (LiDAR: Light Detection and Ranging) or a radio wave sensor (Radar: Radio Detecting and Ranging).

[0033] The image processing unit 245 and the frame memory 243 can be configured, for example, by an integrated circuit. Integrated circuits include large-scale integration (LSI), application-specific integrated circuits (ASIC), and programmable logic devices (PLD). PLDs include, for example, field-programmable gate arrays (FPGA). An integrated circuit may also include an analog circuit as part of its configuration, or may be a combination of a processor and an integrated circuit. The combination of a processor and an integrated circuit is called a microcontroller (MCU: Micro Control Unit), SoC (System-on-a-chip), system LSI, chipset, etc.

[0034] The image processing unit 245 expands the image data input from the interface 241 into the frame memory 243. The frame memory 243 includes a plurality of banks. Each bank has a storage capacity sufficient to store one frame's worth of image data. The frame memory 243 is configured, for example, by an SDRAM (Synchronous Dynamic Random Access Memory).

[0035] The image processing unit 245 performs image processing on the image data expanded in the frame memory 243, such as resolution conversion processing or resizing processing, distortion aberration correction, shape correction processing, digital zoom processing, and adjustment of the color tone and brightness of the image. The image processing unit 245 also generates a vertical synchronization signal by converting the input frame frequency of the vertical synchronization signal into a drawing frequency. The generated vertical synchronization signal is called an output synchronization signal. The image processing unit 245 outputs the generated output synchronization signal to the light modulation device driving unit 222.

[0036] The control unit 250 includes a memory 251 and a processor 253 . The memory 251 is a storage device that non-volatilely stores programs and data executed by the processor 253. The memory 251 is configured by a semiconductor storage element such as a magnetic storage device or a flash ROM (Read Only Memory), or other types of non-volatile storage device. The memory 251 may also include a RAM (Random Access Memory) that configures a work area for the processor 253. The memory 251 stores data processed by the control unit 250 and control programs executed by the processor 253.

[0037] The processor 253 may be configured as a single processor, or multiple processors may function as the processor 253. The processor 253 executes a control program to control each unit of the projector 200. For example, the processor 253 outputs to the image processing unit 245 an instruction to execute image processing corresponding to operations received by the operation unit 231 and the remote control 5, and parameters used for this image processing. The parameters include, for example, geometric correction parameters for correcting geometric distortion of the image projected onto the projection surface PS. The processor 253 also controls the light source driving unit 221 to turn on and off the light source unit 211, and adjusts the brightness of the light source unit 211.

[0038] The processor 253 of the control unit 250 performs the following processing by executing a control program stored in the memory 251. The processing performed by the processor 253 will be described with reference to Figures 1 and 3. Figure 3 is a plan view showing an example of the reference surface ST1 and the projection surface PS. The processor 253 detects the distance L. The processor 253 acquires the distance LA from the distance sensor 242, for example, and calculates the distance L based on the distance LA. The distance L indicates the distance between the reference plane ST1 and the projection surface PS, as shown in FIG. 3. Specifically, the processor 253 calculates a first distance L1, a second distance L2, and a third distance L3. As shown in Fig. 3, the first distance L1 indicates the distance L between the reference plane ST1 and a first portion Q1 of the projection surface PS. The second distance L2 indicates the distance L between the reference plane ST1 and a second portion Q2 of the projection surface PS. The third distance L3 indicates the distance L between the reference plane ST1 and a third portion Q3 of the projection surface PS.

[0039] The processor 253 also projects the image light PL of a first aspect AP1 according to the first distance L1 onto the first portion Q1. The first aspect AP1 indicates, for example, a first color CL1. The first color CL1 is, for example, as shown in FIG. black It's color. The processor 253 projects the image light PL of the second aspect AP2 according to the second distance L2 onto the second portion Q2. The second aspect AP2 indicates, for example, a second color CL2. The second color CL2 is, for example, as shown in FIG. white It's color. The processor 253 projects image light PL of a third aspect AP3 based on the first aspect AP1 and the second aspect AP2 onto the third portion Q3. The third aspect AP3 represents, for example, an intermediate color CL3 between the first color CL1 and the second color CL2. As shown in FIG. 1, the intermediate color CL3 is, for example, gray. The luminance value B3 of the intermediate color CL3 corresponding to the third distance L3 is expressed, for example, by the above equation (2), as described with reference to FIG. 1.

[0040] In this embodiment, the first color CL1 is black color, and the second color CL2 is whiteAlthough the present invention is not limited to this, the first color CL1 may be a chromatic color, and the second color CL2 may be a chromatic color different from the first color CL1. If the R, G, and B components of the first color CL1 are (R1, G1, B1), and the R, G, and B components of the second color CL2 are (R2, G2, B2), the intermediate color CL3 is expressed by, for example, the following formulas (3) to (5). R3=((L3-L1)×R2+(L2-L3)×R1) / (L2-L1) (3) G3=((L3-L1)×G2+(L2-L3)×G1) / (L2-L1) (4) B3=((L3-L1)×B2+(L2-L3)×B1) / (L2-L1) (5) Here, (R3, G3, B3) represent the R component, the G component, and the B component of the intermediate color CL3.

[0041] The processor 253 receives, from the remote controller 5, input of information specifying the first aspect AP1 and the second aspect AP2. In this embodiment, the processor 253 receives input of information specifying the first color CL1 and the second color CL2 from the remote control 5 via the display mode setting screen 300. The display mode setting screen 300 will be described with reference to FIG.

[0042] The reference plane ST1 is, for example, a plane that is perpendicular to the projection axis LC of the projector 200. The projector 200 is disposed in the negative direction of the Y axis with respect to the projection surface PS. Furthermore, the projection surface PS is disposed symmetrically with respect to the projection axis LC. The reference plane ST1 is a plane that is perpendicular to the projection axis LC at the positive end of the projector 200 in the Y-axis direction. The projection axis LC indicates the central axis of the projection range PA of the projection light. The projection range PA is, for example, a range of a spread angle θ centered on the projection axis LC. When there is no need to distinguish between the reference surface ST1 and the reference surface ST2 shown in FIG. 8, they may be referred to as the reference surface ST in the following description.

[0043] In this embodiment, a case will be described in which the reference plane ST1 is a plane that is perpendicular to the projection axis LC at the positive end of the projector 200 in the Y-axis direction, but is not limited to this. The reference plane ST1 may be a plane that is perpendicular to the projection axis LC. For example, the reference plane ST1 may be a plane that is perpendicular to the projection axis LC at the center position of the projector 200 in the Y-axis direction. Furthermore, the reference plane ST may be any plane that intersects with the projection axis LC of the projector 200. A case where the reference plane is a curved surface will be described with reference to FIG.

[0044] The projection surface PS indicates the surface of each of the first object BJ1 to the sixth object BJ6 that faces in the negative direction of the Y axis. The first object BJ1 is composed of a first member BJ11 and a second member BJ12. The first portion Q1 corresponds to the end of each of the first member BJ11 and the second member BJ12 in the negative direction of the Y axis. The second portion Q2 corresponds to the end of each of the first member BJ11 and the second member BJ12 in the positive direction of the Y axis. The third portion Q3 corresponds to the surface of each of the third object BJ3 and the fourth object BJ4 that faces in the negative direction of the Y axis.

[0045] As shown in FIG. 3, the first distance L1 indicates the distance L between the reference plane ST1 and a first portion Q1 of the projection surface PS. In other words, the first distance L1 corresponds to the shortest distance LN between the reference plane ST1 and the projection surface PS. The second distance L2 indicates the distance L between the reference plane ST1 and a second portion Q2 of the projection surface PS. In other words, the second distance L2 corresponds to the longest distance LX between the reference plane ST1 and the projection surface PS. The third distance L3 indicates the distance L between the reference plane ST1 and a third portion Q3 of the projection surface PS.

[0046] The focal length LF indicates the distance between the reference plane ST1 and the focal point FP of the projector 200. The first distance L1 is smaller than the focal length LF, and the second distance L2 is larger than the focal length LF.

[0047] Therefore, when the distance L on the projection surface PS satisfies the following formula (6), an image that is in focus can be projected onto the projection surface PS. (LF-FR / 2)≦L≦(LF+FR / 2) (6) The focal depth FR indicates the focal depth FR of the projector 200. Therefore, if the projection surface PS satisfies the above formula (6), an in-focus image can be projected. Therefore, an in-focus image can be projected onto at least a partial area of ​​the projection surface PS. Furthermore, when the first distance L1 is equal to or greater than (LF-FR / 2) and the second distance L2 is equal to or less than (LF+FR / 2), an image that is in focus can be projected over the entire projection surface PS.

[0048] 4 is a screen diagram showing an example of a display mode setting screen 300. The display mode setting screen 300 is displayed on the LCD of the touch panel 51 of the remote control 5 in accordance with an instruction from the control unit 250. The display mode setting screen 300 is a screen for setting the display mode of the projected image to be displayed on the projection surface PS based on an operation from the user. The display mode setting screen 300 corresponds to an example of a screen for setting the display mode of the projected image when the projected image shown in FIG. 1 is displayed on the projection surface PS shown in FIGS. 1 and 3. 4, a setting result display section CS, a mode selection section CP, a first position selection mark NM, and a second position selection mark FM are displayed on the display mode setting screen 300. The setting result display section CS includes a first setting result display section CSA, a second setting result display section CSN, and a third setting result display section CSF.

[0049] The first setting result display unit CSA displays the state of the image light PL projected onto the projection surface PS when the distance L is in the range of not less than the first distance L1 and not more than the second distance L2. In Fig. 4, the first setting result display unit CSA displays the color of the image light PL projected onto the projection surface PS when the distance L is in the range of not less than the first distance L1 and not more than the second distance L2. The second setting result display unit CSN displays the state of the image light PL projected onto the projection surface PS where the distance L is less than the first distance L1. The second setting result display unit CSN is set to the first state AP1. In Fig. 4, the second setting result display unit CSN displays the color of the image light PL projected onto the projection surface PS where the distance L is less than the first distance L1, i.e., black, which is the first color CL1 in Fig. 4. The third setting result display unit CSF displays the state of the image light PL projected onto the projection surface PS where the distance L is greater than the second distance L2. 3 Setting result display section CS F is set to the second aspect AP2. In Fig. 4, the third setting result display unit CSF displays the color of the image light PL projected onto the projection surface PS where the distance L is greater than the second distance L2, that is, white, which is the second color CL2 in Fig. 4.

[0050] Each of the first position selection mark NM and the second position selection mark FM is displayed so as to be selectable based on a user operation. The first position selection mark NM is selected by the user when setting the color of the image light PL of the projection surface PS corresponding to the first distance L1. The user selects the first position selection mark NM, for example, by touching the first position selection mark NM. The second position selection mark FM is selected by the user when setting the color of the image light PL of the projection surface PS corresponding to the second distance L2. The user selects the second position selection mark FM, for example, by touching the second position selection mark FM. 4 shows the state in which the first position selection mark NM is selected. The first selection mark SM1 displayed around the first position selection mark NM indicates that the first position selection mark NM is selected. When the second position selection mark FM is selected, the first selection mark SM1 is displayed around the second position selection mark FM. The selected first position selection mark NM or second position selection mark FM is highlighted by the first selection mark SM1.

[0051] The mode selection unit CP is selected by the user when setting the mode of the image light PL of the projection surface PS corresponding to the first distance L1 or the mode of the image light PL of the projection surface PS corresponding to the second distance L2. In Fig. 4, the mode selection unit CP is selected by the user when setting the color of the image light of the projection surface PS corresponding to the first distance L1 or the color of the image light PL of the projection surface PS corresponding to the second distance L2. The mode selection section CP includes mode display sections C1 to C11. Mode display sections C1 to C9 and mode display section C11 are selected by the user when setting the color of the image light PL of the projection surface PS corresponding to the first distance L1 or the color of the image light PL of the projection surface PS corresponding to the second distance L2. The mode display section C10 will be described with reference to a display mode setting screen 500 shown in FIG. 6. The mode display sections C1 to C8 show chromatic colors such as red, green, and blue, the mode display section C9 shows black, and the mode display section C11 shows white.

[0052] 4 shows the state in which the manner display section C9 is selected. The second selection mark SM2 displayed around the manner display section C9 indicates that the manner display section C9 is selected. In other words, the selected manner is highlighted. The user selects the manner display section C9, for example, by touching the manner display section C9. 4, by touching the first position selection mark NM to select the first position selection mark NM, and then touching the mode display section C9 of the mode selection section CP to select the mode display section C9, the color of the image light PL of the projection surface PS corresponding to the first distance L1 can be set to the first color CL1, which is black. Also, by touching the second position selection mark FM to select the second position selection mark FM, and then touching the mode display section C11 of the mode selection section CP to select the mode display section C11, the color of the image light PL of the projection surface PS corresponding to the second distance L2 can be set to the second color CL2, which is white.

[0053] As a result, the first color CL1, black, is set at the left end of the first setting result display section CSA, the second color CL2, white, is set at the right end of the first setting result display section CSA, and the intermediate color CL3 is displayed at the center of the first setting result display section CSA. Furthermore, the second setting result display section CSN is set to black, which is the first color CL1, and the third setting result display section CSF is set to white, which is the second color CL2.

[0054] As explained with reference to Fig. 4, by setting the color of the image light PL of the projection surface PS corresponding to the first distance L1 and the color of the image light PL of the projection surface PS corresponding to the second distance L2, the color of the image light PL of the projection surface PS can be set as shown in the setting result display section CS. As a result, as explained with reference to Fig. 1, a projection image with a high degree of freedom can be displayed on the projection surface PS.

[0055] 4 illustrates a case where the color of the image light PL of the projection surface PS corresponding to the first distance L1 is set to the first color CL1, which is black, and the color of the image light PL of the projection surface PS corresponding to the second distance L2 is set to the second color CL2, which is white, but this is not limiting. At least one of the color of the image light PL of the projection surface PS corresponding to the first distance L1 and the color of the image light PL of the projection surface PS corresponding to the second distance L2 may be set to a chromatic color. For example, when the color of the image light PL of the projection surface PS corresponding to the first distance L1 is set to red and the color of the image light PL of the projection surface PS corresponding to the second distance L2 is set to green, R In the GB color space, the color corresponding to the line segment connecting the point corresponding to red and the point corresponding to green is set as the image light PL of the projection surface PS. Therefore, a colorful projection image can be displayed on the projection surface PS.

[0056] FIG. 5 is a diagram showing an example of the display mode setting screen 400. As shown in FIG. 4 in that the display mode setting screen 400 displays an intermediate position selection mark MM. In the following explanation, the differences from the display mode setting screen 300 will be mainly described. The display mode setting screen 400 displays a setting result display section CS, a mode selection section CP, a first position selection mark NM, a second position selection mark FM, and an intermediate position selection mark MM. The setting result display section CS includes a first setting result display section CSA, a second setting result display section CSN, and a third setting result display section CSF. The mode selection section CP includes mode display sections C1 to C11.

[0057] The intermediate position selection mark MM is displayed based on a user's operation when setting the color of the image light PL on the projection surface PS corresponding to the intermediate distance LM. The intermediate distance LM is greater than the first distance L1 and less than the second distance L2. For example, the intermediate position selection mark MM is displayed when the user touches a position on the first setting result display unit CSA that corresponds to the intermediate distance LM. The intermediate position selection mark MM is selected by the user when setting the color of the image light PL on the projection surface PS corresponding to the intermediate distance LM. The user selects the intermediate position selection mark MM, for example, by touching the intermediate position selection mark MM. When the intermediate position selection mark MM is selected, a first selection mark SM1 is displayed around the intermediate position selection mark MM, as shown in FIG. 5.

[0058] The user can set the color of the image light PL on the projection surface PS corresponding to the intermediate distance LM by selecting one of the mode display sections C1 to C11 of the mode selection section CP. For example, to select mode display section C9, the user performs a touch operation on mode display section C9. As a result, a second selection mark SM2 is displayed around mode display section C9. The second selection mark SM2 indicates that mode display section C9 has been selected.

[0059] As a result, the first color CL1, black, is set at the left end of the first setting result display section CSA, the first color CL1, black is set at the position corresponding to the intermediate distance LM on the first setting result display section CSA, and the second color CL2, white, is set at the right end of the first setting result display section CSA. Then, the first color CL1, black, is displayed from the left end of the first setting result display section CSA to the position corresponding to the intermediate distance LM, and the intermediate color CL3 is displayed from the position corresponding to the intermediate distance LM on the first setting result display section CSA to the right end.

[0060] 5, by setting the color of the image light PL of the projection surface PS corresponding to the first distance L1, the color of the image light PL of the projection surface PS corresponding to the intermediate distance LM, and the color of the image light PL of the projection surface PS corresponding to the second distance L2, the color of the image light PL of the projection surface PS can be set as shown in the setting result display section CS. As a result, a projection image with a high degree of freedom can be displayed on the projection surface PS.

[0061] 5, the color of the image light PL of the projection surface PS corresponding to the intermediate distance LM is set to the first color CL1, which is black, but this is not limiting. The color of the image light PL of the projection surface PS corresponding to the intermediate distance LM may be any color that corresponds to one of the state display portions C1 to C11. For example, if the color of the image light PL of the projection surface PS corresponding to the intermediate distance LM is set to the second color CL2, which is white, the intermediate color CL3 is displayed between the left end of the first setting result display unit CSA and the position corresponding to the intermediate distance LM, and the second color CL2, which is white, is displayed between the position corresponding to the intermediate distance LM and the right end of the first setting result display unit CSA. Furthermore, when the color of the image light PL of the projection surface PS corresponding to the intermediate distance LM is set to red, an intermediate color between the first color CL1, which is black, and red, is displayed between the left end of the first setting result display unit CSA and the position corresponding to the intermediate distance LM, and an intermediate color between red and the second color CL2, which is white, is displayed between the position corresponding to the intermediate distance LM and the right end of the first setting result display unit CSA.

[0062] Furthermore, the projection surface PS from the first distance L1 to the second distance L2 is divided into two sections: the projection surface PS from the first distance L1 to the intermediate distance LM, and the projection surface PS from the intermediate distance LM to the second distance L2. At the intermediate distance LM, the color of the image light PL in the two sections matches the color of the image light PL of the projection surface PS corresponding to the intermediate distance LM. Furthermore, on the projection surface PS from the first distance L1 to the intermediate distance LM, the color changes continuously according to the distance L, and on the projection surface PS from the intermediate distance LM to the second distance L2, the color changes continuously according to the distance L. Therefore, because the color of the image light PL projected onto the projection surface PS changes continuously, a natural projected image can be displayed on the projection surface PS.

[0063] FIG. 6 is a diagram showing an example of the display mode setting screen 500. As shown in FIG. 4, the display mode setting screen 500 differs in that it displays a range display mark RM and a range selection mark CM. The following explanation will mainly focus on the differences from the display mode setting screen 300. The display mode setting screen 500 displays a setting result display section CS, a mode selection section CP, a first position selection mark NM, a second position selection mark FM, a range display mark RM, and a range selection mark CM. The setting result display section CS includes a first setting result display section CSA, a second setting result display section CSN, and a third setting result display section CSF. The mode selection section CP includes mode display sections C1 to C11.

[0064] The range display mark RM and the range selection mark CM are displayed based on the user's operation when setting the color of the image light PL on the projection surface PS corresponding to the range between the first intermediate distance LM1 and the second intermediate distance LM2. The second intermediate distance LM2 is larger than the first intermediate distance LM1. The first intermediate distance LM1 is larger than the first distance L1, and the second intermediate distance LM2 is smaller than the second distance L2. The fourth distance L4 is equal to or larger than the first intermediate distance LM1 and is smaller than the second intermediate distance LM2. below The portion of the projection surface PS that corresponds to the fourth distance L4 is a fourth portion Q4 (not shown). For example, when the user simultaneously touches a position corresponding to the first intermediate distance LM1 and a position corresponding to the second intermediate distance LM2 on the first setting result display unit CSA, a range display mark RM and a range selection mark CM are displayed. The range indication mark RM indicates the range from the first intermediate distance LM1 to the second intermediate distance LM2 in the first setting result display area CSA. The range indication mark RM includes a first range indication mark RM1 and a second range indication mark RM2. The first range indication mark RM1 indicates the position of the first intermediate distance LM1 in the first setting result display area CSA, and the second range indication mark RM2 indicates the position of the second intermediate distance LM2 in the first setting result display area CSA.

[0065] The range selection mark CM is selected by the user when setting the mode of the image light PL on the projection surface PS corresponding to the range from the first intermediate distance LM1 to the second intermediate distance LM2. The user selects the range selection mark CM, for example, by touching the range selection mark CM. When the range selection mark CM is selected, a third selection mark SM3 is displayed around the range selection mark CM, as shown in FIG. 6.

[0066] The user can set the color of the aspect of the projection surface PS that corresponds to the intermediate distance LM by selecting one of the aspect display sections C1 to C11 of the aspect selection section CP. For example, to select aspect display section C10, the user performs a touch operation on aspect display section C10. As a result, a second selection mark SM2 is displayed around aspect display section C10. The second selection mark SM2 indicates that aspect display section C10 has been selected. The aspect display section C10 shows a pattern image. The pattern image corresponds to an example of a fourth aspect AP4. The fourth aspect AP4 shows the aspect of the image light PL projected onto the fourth portion Q4.

[0067] As a result, the first color CL1, black, is set to the left end of the first setting result display section CSA, the second color CL2, white is set to the right end of the first setting result display section CSA, and a pattern image is set at a position on the first setting result display section CSA corresponding to the range from the first intermediate distance LM1 to the second intermediate distance LM2. Then, an intermediate color CL3 is displayed between the left end and the first intermediate distance LM1 of the first setting result display section CSA and between the second intermediate distance LM2 and the right end, and a pattern image is displayed between the first intermediate distance LM1 and the second intermediate distance LM2.

[0068] In this embodiment, the fourth distance L4 is greater than the first intermediate distance LM1 and less than the second intermediate distance LM2. For example, when the fourth distance L4 is equal to the third distance L3, a pattern image is displayed on the third projection surface PS3 and the fourth projection surface PS4 shown in Fig. 1. Because the third projection surface PS3 and the fourth projection surface PS4 are planes parallel to the XZ plane, the pattern image is displayed without distortion. Therefore, the pattern image can be displayed clearly.

[0069] 6, by setting the color of the image light PL of the projection surface PS corresponding to the first distance L1, the colors of the image light PL of the projection surface PS corresponding to the first intermediate distances LM1 to LM2, and the color of the image light PL of the projection surface PS corresponding to the second distance L2, the color of the image light PL of the projection surface PS can be set as shown in the setting result display section CS. As a result, a projection image with a high degree of freedom can be displayed on the projection surface PS.

[0070] 6, a case where a pattern image is displayed between the first intermediate distance LM1 and the second intermediate distance LM2 of the projection surface PS has been described, but the present invention is not limited to this. Image light PL of a fourth aspect AP4, which is different from the first aspect AP1, the second aspect AP2, and the third aspect AP3, may be projected between the first intermediate distance LM1 and the second intermediate distance LM2 of the projection surface PS. Also, for example, the aspect display unit C 1 A mode may be selected from C8 to C8. In this case, the selected color is displayed as the fourth mode AP4. For example, the fourth aspect AP4 may be a still image such as a landscape image, a portrait image, etc. Also, the fourth aspect AP4 may be a moving image. Therefore, a highly flexible projection image can be displayed on the projection surface PS.

[0071] Fig. 7 is a flowchart showing an example of processing by the control unit 250. Fig. 7 illustrates a case where image light PL is projected onto the projection surface PS based on the setting result display section CS set on the display mode setting screen 300 shown in Fig. 4. First, in step S101, the control unit 250 acquires the distance LA corresponding to the first portion Q1 from the distance sensor 242 and detects the first distance L1 based on the distance LA. The first distance L1 indicates the distance between the reference surface ST1 and the first portion Q1 of the projection surface PS. Then, the control unit 250 projects the image light PL of the first color CL1 onto the first portion Q1. Next, in step S103, the control unit 250 acquires the distance LA corresponding to the second portion Q2 from the distance sensor 242 and detects the second distance L2 based on the distance LA. The second distance L2 indicates the distance between the reference surface ST1 and the second portion Q2 of the projection surface PS. Then, the control unit 250 projects the image light PL of the second color CL2 onto the second portion Q2. Next, in step S105, the control unit 250 acquires the distance LA corresponding to the third portion Q3 from the distance sensor 242, and detects the third distance L3 based on the distance LA. The third distance L3 indicates the distance between the reference surface ST1 and the third portion Q3 of the projection surface PS.

[0072] Next, in step S107, the control unit 250 determines whether the third distance L3 is equal to or less than the first distance L1. If the control unit 250 determines that the third distance L3 is equal to or less than the first distance L1 (step S107; YES), the process proceeds to step S109. Then, the control unit 250 projects the image light PL of the first color CL1 onto the third portion Q3, and then the process ends. If the control unit 250 determines that the third distance L3 is not equal to or less than the first distance L1 (step S107; NO), the process proceeds to step S111. Then, in step S111, the control unit 250 determines whether the third distance L3 is equal to or greater than the second distance L2. If the control unit 250 determines that the third distance L3 is equal to or greater than the second distance L2 (step S111; YES), the process proceeds to step S113. Then, in step S113, the control unit 250 projects the image light PL of the second color CL2 onto the third portion Q3, and then the process ends.

[0073] If the control unit 250 determines that the third distance L3 is not equal to or greater than the second distance L2 (step S111; NO), the process proceeds to step S115. Then, in step S115, the control unit 250 calculates an intermediate color CL3 between the first color CL1 and the second color CL2 using the above formulas (3) to (5). Next, in step S117, the control unit 250 projects the image light PL of the neutral color CL3 onto the third portion Q3, and then the process ends.

[0074] In this way, image light PL of the first color CL1 is projected onto the first portion Q1, image light PL of the second color CL2 is projected onto the second portion Q2, and when the third distance L3 is greater than the first distance L1 and less than the second distance L2, image light PL of the intermediate color CL3 is projected onto the third portion Q3. Therefore, a highly flexible projection image can be displayed with simple settings.

[0075] FIG. 8 is a plan view showing another example of the reference surface ST2. Fig. 8 differs from Fig. 3 in that the reference surface ST2 is a curved surface. The following mainly describes the differences from Fig. 3.

[0076] The reference surface ST2 is a curved surface that is orthogonal to the projection axis LC at the positive end in the Y-axis direction of the projector 200. Specifically, the reference surface ST2 is, for example, a part of the circumferential surface of a cylinder whose central axis is disposed in the Z-axis direction. In this case, the first distance L1 coincides with the length of a line segment that passes through the first portion Q1 and is perpendicular to the reference plane ST2, as shown in Fig. 8. Also, the third distance L3 coincides with the length of a line segment that passes through the third portion Q3 and is perpendicular to the reference plane ST2, as shown in Fig. 8. The first distance L1 shown in FIG. 8 is longer than the first distance L1 shown in FIG. 3, and the third distance L3 shown in FIG. 8 is longer than the third distance L3 shown in FIG. It should be noted that since the second portion Q2 is located on the projection axis LC, the second distance L2 shown in FIG. 8 coincides with the second distance L2 shown in FIG.

[0077] In this way, the distance L between the projection surface PS and the reference surface ST2 increases as the position of the projection surface PS moves away from the projection axis LC. Therefore, the image displayed on the projection surface PS differs from the image shown in FIG.

[0078] As explained with reference to Fig. 8, the image displayed on the projection surface PS can be changed by changing the reference surface ST, for example, from the reference surface ST1 shown in Fig. 3 to the reference surface ST2 shown in Fig. 8. Therefore, a projection image with a high degree of freedom can be displayed on the projection surface PS.

[0079] 8 illustrates a case where the reference surface ST2 is a curved surface that is orthogonal to the projection axis LC at the positive end of the projector 200 in the Y-axis direction, but is not limited to this. The reference surface ST2 may be a curved surface that is orthogonal to the projection axis LC. For example, the reference surface ST2 may be a curved surface that is orthogonal to the projection axis LC at the center position of the projector 200 in the Y-axis direction. Furthermore, the reference surface ST2 may be a curved surface that intersects with the projection axis LC of the projector 200.

[0080] 8, the reference surface ST2 is a part of the circumferential surface of a cylinder, but the present invention is not limited to this. The reference surface ST2 may be a curved surface that intersects with the projection axis LC of the projector 200. For example, the reference surface ST2 may be a part of a spherical surface.

[0081] As described above with reference to Figures 1 to 8, the projection method of this embodiment includes detecting a first distance L1 between the projector 200 and a first portion Q1 of the projection surface PS, detecting a second distance L2 between the projector 200 and a second portion Q2 of the projection surface PS, detecting a third distance L3 between the projector 200 and a third portion Q3 of the projection surface PS, the projector 200 projecting image light PL of a first aspect AP1 corresponding to the first distance L1 onto the first portion Q1, the projector 200 projecting image light PL of a second aspect AP2 corresponding to the second distance L2 onto the second portion Q2, and the projector 200 projecting image light PL of a third aspect AP3 based on the first aspect AP1 and the second aspect AP2 onto the third portion Q3 when the third distance L3 is greater than the first distance L1 and less than the second distance L2. That is, image light PL of the first aspect AP1 according to the first distance L1 is projected onto the first portion Q1, image light PL of the second aspect AP2 according to the second distance L2 is projected onto the second portion Q2, and when the third distance L3 is greater than the first distance L1 and less than the second distance L2, image light PL of the third aspect AP3 based on the first aspect AP1 and the second aspect AP2 is projected onto the third portion Q3. Therefore, the image light PL of the third aspect AP3 based on the first aspect AP1 and the second aspect AP2 can be projected onto the third portion Q3, and therefore a projection image with a high degree of freedom can be displayed on the projection surface PS.

[0082] The first aspect AP1 is a first color CL1, the second aspect AP2 is a second color CL2, and the third aspect AP3 is an intermediate color CL3 between the first color CL1 and the second color CL2. Therefore, image light PL of an intermediate color CL3 between the first color CL1 and the second color CL2 can be projected onto the third portion Q3, and therefore a projection image with a high degree of freedom can be displayed on the projection surface PS.

[0083] Furthermore, the first distance L1 is the distance between the reference plane ST that intersects with the projection axis LC of the projector 200 and the first portion Q1, and the second distance L2 is the distance between the reference plane ST and the second portion Q2. Therefore, the first distance L1 and the second distance L2 can be determined appropriately, and therefore, a projected image can be displayed on the projection surface PS with a high degree of freedom.

[0084] Furthermore, the first distance L1 is the distance between the first portion Q1 and a reference plane ST1, which is a plane perpendicular to the projection axis LC of the projector 200, and the second distance L2 is the distance between the reference plane ST1 and the second portion Q2. Therefore, the first distance L1 and the second distance L2 can be easily calculated from the distance LA detected by the distance sensor 242.

[0085] Furthermore, the first distance L1 is smaller than the focal length LF of the projector 200, and the second distance L2 is larger than the focal length LF. Therefore, since the focal length LF is included between the first distance L1 and the second distance L2, an in-focus image can be projected onto the projection surface PS, thereby improving the quality of the image displayed on the projection surface PS.

[0086] Moreover, the projection method according to this embodiment further includes receiving input of information that specifies at least one of the first aspect AP1 and the second aspect AP2. Therefore, the user can set at least one of the first aspect AP1 and the second aspect AP2, and therefore, a highly flexible projected image can be displayed on the projection surface PS according to the user's preferences.

[0087] In addition, the projection method according to this embodiment further includes displaying image light PL of a fourth aspect AP4 on a fourth portion Q4 of the projection surface PS, which is different from the first portion Q1, the second portion Q2, and the third portion Q3. Therefore, the degree of freedom of the projected image displayed on the projection surface PS can be increased.

[0088] Moreover, the image light PL of the fourth aspect AP4 is a pattern image. Therefore, since a pattern image is displayed in the fourth portion Q4, the degree of freedom of the projected image displayed on the projection surface PS can be increased.

[0089] Moreover, the projection method according to this embodiment further includes projecting the image light PL of the first manner AP1 onto a portion of the projection surface PS that is closer to the projector 200 than the first distance L1. Therefore, it is possible to easily determine the display mode of the portion of the projection surface PS that is closer to the projector 200 than the first distance L1, thereby improving user convenience.

[0090] Moreover, the projection method according to this embodiment further includes projecting the image light PL of the second manner AP2 onto a portion of the projection surface PS that is farther from the projector 200 than the second distance L2. Therefore, it is possible to easily determine the display mode of the portion of the projection surface PS that is farther from the projector 200 than the second distance L2, thereby improving user convenience.

[0091] The projector 200 according to this embodiment is a projector including a light source unit 211, a light modulation device 212, a distance sensor 242, and a control unit 250. The control unit 250 uses the distance sensor 242 to detect a first distance L1 between the projector 200 and a first portion Q1 of the projection surface PS, uses the distance sensor 242 to detect a second distance L2 between the projector 200 and a second portion Q2 of the projection surface PS, and uses the distance sensor 242 to detect a third distance L3 between the projector 200 and a third portion Q3 of the projection surface PS. The light source unit 211 and the light modulation device 212 are used to project image light PL of a first aspect AP1 corresponding to the first distance L1 onto the first portion Q1, the light source unit 211 and the light modulation device 212 are used to project image light PL of a second aspect AP2 corresponding to the second distance L2 onto the second portion Q2, and the light source unit 211 and the light modulation device 212 are used to project image light PL of a third aspect AP3 based on the first aspect AP1 and the second aspect AP2 onto the third portion Q3 when the third distance L3 is greater than the first distance L1 and less than the second distance L2. That is, image light PL of the first aspect AP1 according to the first distance L1 is projected onto the first portion Q1, image light PL of the second aspect AP2 according to the second distance L2 is projected onto the second portion Q2, and when the third distance L3 is greater than the first distance L1 and less than the second distance L2, image light PL of the third aspect AP3 based on the first aspect AP1 and the second aspect AP2 is projected onto the third portion Q3. Therefore, the image light PL of the third aspect AP3 based on the first aspect AP1 and the second aspect AP2 can be projected onto the third portion Q3, and therefore a projection image with a high degree of freedom can be displayed on the projection surface PS.

[0092] The above-described embodiment is a preferred embodiment, but is not limited to the above-described embodiment, and various modifications are possible within the scope of the gist of the present invention. In this embodiment, a case will be described in which the first distance L1 corresponds to the shortest distance LN between the reference plane ST1 and the projection surface PS, and the second distance L2 corresponds to the longest distance LX between the reference plane ST1 and the projection surface PS, but this is not limiting. It is sufficient that the first distance L1 is equal to or greater than the shortest distance LN, and the second distance L2 is equal to or less than the longest distance LX. The first distance L1 and the second distance L2 may be set by the user via the display mode setting screen 300, etc.

[0093] Furthermore, in this embodiment, the second setting result display unit CSN is set to the first aspect AP1, but the aspect of the second setting result display unit CSN may be set to an aspect different from the first aspect AP1. Similarly, in this embodiment, the third setting result display unit CSF is set to the second aspect AP2, but the aspect of the third setting result display unit CSF may be set to an aspect different from the second aspect AP2. Furthermore, at least one of the second setting result display unit CSN and the third setting result display unit CSF may be omitted.

[0094] In addition, in this embodiment, the control unit 250 receives input of information specifying the first color CL1 and the second color CL2, but is not limited to this. The control unit 250 only needs to receive at least one of the first aspect AP1 and the second aspect AP2.

[0095] Furthermore, each functional unit shown in FIG. 2 indicates a functional configuration, and the specific implementation form is not particularly limited. In other words, it is not necessarily necessary to implement hardware corresponding to each functional unit individually, and it is of course possible to configure a single processor to execute a program to realize the functions of multiple functional units. Furthermore, some of the functions realized by software in the above embodiments may be realized by hardware, or some of the functions realized by hardware may be realized by software. In addition, the specific detailed configuration of each of the other units of projector 200 may also be changed as desired without departing from the spirit of the invention.

[0096] 7 are divided according to the main processing content in order to facilitate understanding of the processing of control unit 250. There is no limitation to the division method or names of the processing units shown in the flowchart of FIG. 7, and the processing can be divided into more processing units according to the processing content, or one processing unit can be divided to include more processes. Furthermore, the processing order of the above flowchart is not limited to the example shown in the figure.

[0097] The projection method of the projector 200 can be realized by having the processor 253 included in the projector 200 execute a control program corresponding to the projection method of the projector 200. The control program can also be recorded on a computer-readable recording medium. The recording medium can be a magnetic or optical recording medium, or a semiconductor memory device. Specific examples include portable or fixed recording media such as a flexible disk, a hard disk drive (HDD), a compact disk read-only memory (CD-ROM), a digital versatile disc (DVD), a Blu-ray (registered trademark) disc, a magneto-optical disk, a flash memory, and a card-type recording medium. The recording medium can also be a non-volatile storage device such as a RAM, a ROM, or a HDD, which is an internal storage device included in the projector 200. The projection method of the projector 200 can also be realized by storing a control program corresponding to the projection method of the projector 200 in a server device or the like and downloading the control program from the server device to the projector 200. [Explanation of symbols]

[0098] 1...image display system, 5...remote control, 51...touch panel, 52...operation key, 100...information processing device, 200...projector, 210...projection unit, 211...light source unit, 212...light modulation device, 213...projection optical system, 215...liquid crystal panel, 220...drive unit, 221...light source drive unit, 222...light modulation device drive unit, 231...operation unit, 233...remote control communication unit, 235...input interface, 237...storage unit, 241...input Interface, 242... distance sensor, 243... frame memory, 245... image processing unit, 250... control unit, 251... memory, 253... processor, AP1... first mode, AP2... second mode, AP3... third mode, AP4... fourth mode, B, B1 to B3... brightness value, BJ1 to BJ6... first object to sixth object, C1 to C11... mode display unit, CL1... first color, CL2... second color, CL3... intermediate color, CM... range Range selection mark, CP...mode selection section, CS...setting result display section, CSA...first setting result display section, CSN...second setting result display section, CSF...third setting result display section, NM...first position selection mark, FM...second position selection mark, MM...intermediate position selection mark, FP...focus, L...distance, L1...first distance, L2...second distance, L3...third distance, L4...fourth distance, LA...distance, LC...projection axis, LF...focal length, LM...intermediate distance, LM1... First intermediate distance, LM2...second intermediate distance, LN...shortest distance, LX...longest distance, PA...projection range, PL...image light, PS...projection surface, Q1...first part, Q2...second part, Q3...third part, Q4...fourth part, RM...range indication mark, RM1...first range indication mark, RM2...second range indication mark, SM1...first selection mark, SM2...second selection mark, SM3...third selection mark, ST, ST1, ST2...reference plane, θ...divergence angle.

Claims

1. Detecting a first distance between the projector and a first portion of the projection surface; Detecting a second distance between the projector and a second portion of the projection surface; Detecting a third distance between the projector and a third portion of the projection surface; the projector projects image light of a first aspect according to the first distance onto the first portion; the projector projects image light of a second aspect according to the second distance onto the second portion; the projector projects image light of a third aspect based on the first aspect and the second aspect onto the third portion when the third distance is greater than the first distance and smaller than the second distance; the first aspect is a first color; the second aspect is a second color; the third aspect is an intermediate color between the first color and the second color, projecting the image light of a fourth aspect onto a fourth portion of the projection surface, which is different from the first portion, the second portion, and the third portion and corresponds to a range from a first intermediate distance that is larger than the first distance to a second intermediate distance that is larger than the first intermediate distance and smaller than the second distance; Further comprising: The projection method, wherein the image light of the fourth aspect is a still image including at least one of a landscape image and a portrait image, or a moving image.

2. the first distance is a distance between a plane intersecting a projection axis of the projector and the first portion, the second distance is the distance between the intersecting plane and the second portion; The projection method according to claim 1 .

3. the first distance is a distance between a plane perpendicular to a projection axis of the projector and the first portion, the second distance is the distance between the orthogonal plane and the second portion; The projection method according to claim 1 .

4. the first distance is less than a focal length of the projector; The second distance is greater than the focal length. The projection method according to any one of claims 1 to 3.

5. accepting input of information specifying at least one of the first aspect and the second aspect; The projection method according to claim 1 , further comprising:

6. projecting the image light of the first aspect onto a portion of the projection surface that is closer to the projector than the first distance; The projection method according to claim 1 , further comprising:

7. projecting the image light of the second aspect onto a portion of the projection surface that is farther from the projector than the second distance; The projection method according to claim 1 , further comprising:

8. A light source and a light modulation device that modulates the light emitted from the light source; A distance sensor, A projector including a control unit, The control unit Detecting a first distance between the projector and a first portion of a projection surface using the distance sensor; detecting a second distance between the projector and a second portion of the projection surface using the distance sensor; using the distance sensor to detect a third distance indicating a distance between the projector and a third portion of the projection surface; projecting image light of a first aspect according to the first distance onto the first portion using the light source and the light modulation device; projecting image light of a second aspect according to the second distance onto the second portion using the light source and the light modulation device; projecting, using the light source and the light modulation device, image light of a third aspect based on the first aspect and the second aspect onto the third portion when the third distance is greater than the first distance and smaller than the second distance; and the first aspect is a first color; the second aspect is a second color; the third aspect is an intermediate color between the first color and the second color, The control unit projecting the image light of a fourth aspect onto a fourth portion of the projection surface, which is different from the first portion, the second portion, and the third portion and corresponds to a range from a first intermediate distance that is larger than the first distance to a second intermediate distance that is larger than the first intermediate distance and smaller than the second distance; Further, The image light of the fourth aspect is a still image or a moving image including at least one of a landscape image and a portrait image.

Images