WO2021131646A1 - 投影装置、投影方法、及び制御プログラム - Google Patents

投影装置、投影方法、及び制御プログラム Download PDF

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Publication number
WO2021131646A1
WO2021131646A1 PCT/JP2020/045519 JP2020045519W WO2021131646A1 WO 2021131646 A1 WO2021131646 A1 WO 2021131646A1 JP 2020045519 W JP2020045519 W JP 2020045519W WO 2021131646 A1 WO2021131646 A1 WO 2021131646A1
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WO
WIPO (PCT)
Prior art keywords
projection
end portion
unit
area
projection area
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2020/045519
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
智紀 増田
晶啓 石塚
和紀 井上
一樹 石田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujifilm Corp
Original Assignee
Fujifilm Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujifilm Corp filed Critical Fujifilm Corp
Priority to JP2021567169A priority Critical patent/JP7250175B2/ja
Publication of WO2021131646A1 publication Critical patent/WO2021131646A1/ja
Priority to US17/831,516 priority patent/US11889238B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3191—Testing thereof
    • H04N9/3194—Testing thereof including sensor feedback
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3179—Video signal processing therefor
    • H04N9/3185—Geometric adjustment, e.g. keystone or convergence
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3179—Video signal processing therefor
    • H04N9/3188—Scale or resolution adjustment
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/04—Changes in size, position or resolution of an image
    • G09G2340/045—Zooming at least part of an image, i.e. enlarging it or shrinking it
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2354/00—Aspects of interface with display user
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/001—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background
    • G09G3/002—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background to project the image of a two-dimensional display, such as an array of light emitting or modulating elements or a CRT

Definitions

  • the present invention relates to a projection device, a projection method, and a control program.
  • a projector that displays an image by projecting it on an object to be projected such as a large screen.
  • Some such projectors can enlarge or reduce the projected image by changing the optical system of the projection lens or the like, and can adjust the position and size of the projected image with respect to the projected object.
  • Patent Document 1 describes a projector that performs auto-zooming that displays an image pattern in the entire display area of a screen using sensor data obtained by a line sensor.
  • Patent Document 2 describes a projector that adjusts the entire projection area so that it fits in the screen by narrowing the zoom angle and narrowing the projection area without changing the center position of the projection optical axis of the projection lens. ..
  • One embodiment according to the technique of the present disclosure provides a projection device, a projection method, and a control program capable of facilitating adjustment of a projection area with respect to a projected object.
  • the projection device of the present invention includes a projection unit and a processor, and the processor detects that a part of the end portion of the projection region where the projection unit irradiates the projected light is the first position. In, the control for maintaining the position of a part of the end portion and enlarging or reducing the projection area is executed.
  • the projection method of the present invention is a projection method by a projection device having a projection unit, and the state in which the projection unit detects that a part of the end portion of the projection region to which the projected light is irradiated is the first position. In, the position of a part of the end portion is maintained, and the projection area is enlarged or reduced.
  • the projection program of the present invention is a projection program of a projection device having a projection unit, and the state in which the projection unit detects that a part of the end portion of the projection region to which the projection light is irradiated is the first position.
  • the purpose is to cause the computer to perform a process of enlarging or reducing the projection area while maintaining the position of a part of the end portion.
  • a projection device a projection method, and a control program that can facilitate adjustment of a projection area with respect to a projected object.
  • FIG. 10 It is a schematic diagram which shows the schematic structure of the projection apparatus 10 which is one Embodiment of the projection apparatus of this invention. It is a schematic diagram which shows an example of the internal structure of the projection part 1 shown in FIG. It is a figure which shows an example of the state of the projection area 11 before adjustment of a projection part 1.
  • FIG. It is a figure which shows the 1st state of the projection area 11 during adjustment of a projection part 1.
  • FIG. It is a figure which shows an example of the selection screen of the 1st fixed end portion.
  • FIG. It is a figure which shows an example of the selection screen of the 2nd fixed end part.
  • FIG. 5 is a schematic cross-sectional view of the optical unit 106 of the projection device 10 shown in FIG. It is a figure which shows the modification of the selection screen of the fixed end portion of a projection area 11.
  • FIG. 1 is a schematic view showing a schematic configuration of a projection device 10 which is an embodiment of the projection device of the present invention.
  • the projection device 10 includes a projection unit 1, a control device 4, an imaging unit 5, a screen 6, and an operation reception unit 2.
  • the projection unit 1 is composed of, for example, a liquid crystal projector, a projector using LCOS (Liquid Crystal On Silicon), or the like. Hereinafter, it is assumed that the projection unit 1 is a liquid crystal projector.
  • the control device 4 includes a control unit composed of various processors, a communication interface (not shown) for communicating with each unit, and a storage medium such as a hard disk, SSD (Solid State Drive), or ROM (Read Only Memory). It is a device including 4a, and controls the projection unit 1 and the imaging unit 5 in an integrated manner.
  • a control unit composed of various processors, a communication interface (not shown) for communicating with each unit, and a storage medium such as a hard disk, SSD (Solid State Drive), or ROM (Read Only Memory). It is a device including 4a, and controls the projection unit 1 and the imaging unit 5 in an integrated manner.
  • the circuit configuration is changed after manufacturing the CPU (Central Processing Unit), FPGA (Field Programmable Gate Array), etc., which are general-purpose processors that execute programs and perform various processes.
  • a dedicated electric circuit or the like which is a processor having a circuit configuration specially designed to execute a specific process such as a programmable logic device (PLD) or an ASIC (Application Special Integrated Circuit), which is a possible processor. Is included.
  • the structure of these various processors is an electric circuit that combines circuit elements such as semiconductor elements.
  • the control unit of the control device 4 may be composed of one of various processors, or a combination of two or more processors of the same type or different types (for example, a combination of a plurality of FPGAs or a combination of a CPU and an FPGA). It may be composed of.
  • the image pickup unit 5 includes an image pickup element such as a CCD (Charged Coupled Device) type image sensor or a MOS (Metal Oxide Semiconductor) type image sensor that takes an image of a subject through an imaging optical system, and images the screen 6.
  • the captured image captured by the imaging unit 5 is input to the control device 4.
  • the operation reception unit 2 detects an instruction (user instruction) from the user by receiving various operations from the user.
  • the operation receiving unit 2 may be a button or the like provided on the control device 4, or may be a receiving unit or the like that receives a signal from a remote controller that remotely controls the control device 4.
  • the screen 6 is an object to be projected, which has a projection surface on which the projected image is displayed by the projection unit 1.
  • the projection plane of the screen 6 is rectangular. It is assumed that the top, bottom, left, and right of the screen 6 in FIG. 1 are the top, bottom, left, and right of the actual screen 6.
  • the imaging unit 5 is provided independently, but the imaging unit 5 may be built in the projection unit 1. Further, the imaging unit 5 may be omitted in the projection device 10.
  • FIG. 2 is a schematic view showing an example of the internal configuration of the projection unit 1 shown in FIG.
  • the projection unit 1 includes a display unit 21 including a light source 21a and an optical modulation unit 21b, a projection optical system 22, and a control unit 24.
  • the light source 21a includes a light emitting element such as a laser or an LED (Light Emitting Diode), and emits white light, for example.
  • a light emitting element such as a laser or an LED (Light Emitting Diode), and emits white light, for example.
  • the light modulation unit 21b modulates each color light emitted from the light source 21a and separated into three colors of red, blue, and green by a color separation mechanism (not shown) based on image information to emit each color image. It is composed of a liquid crystal panel. Red, blue, and green filters may be mounted on each of the three liquid crystal panels, and the white light emitted from the light source 21a may be modulated by each liquid crystal panel to emit each color image.
  • the projection optical system 22 receives light from the display unit 21, and includes, for example, a relay optical system including at least one lens. The light that has passed through the projection optical system 22 is projected onto the screen 6.
  • the control unit 24 controls the display unit 21 based on the display data input from the control device 4 to project an image based on the display data on the screen 6.
  • the display data input to the control unit 24 is composed of three components: red display data, blue display data, and green display data.
  • control unit 24 enlarges or reduces the projection area 11 (see FIG. 3) of the projection unit 1 by changing the projection optical system 22 based on the operation received by the operation reception unit 2 from the user. .. Further, the control unit 24 may move the projection area 11 of the projection unit 1 by changing the projection optical system 22 based on the operation from the user received by the operation reception unit 2.
  • the projection device 10 may include an adjustment unit that mechanically or optically adjusts the position of the projection region 11.
  • This adjusting unit is realized by, for example, a shift mechanism or a shooting direction changing mechanism.
  • the shift mechanism is, for example, a shift mechanism that performs a mechanical shift that moves the projection optical system 22 in a direction perpendicular to the optical axis (see, for example, FIGS. 10 and 11), or an optical modulation unit 21b instead of moving the projection optical system 22. Is an optical shift that moves the light in a direction perpendicular to the optical axis. Further, the shift mechanism may be a combination of mechanical shift and optical shift.
  • the shooting direction changing mechanism is a mechanism that can change the projection direction of the projection unit 1 by changing the direction of the projection unit 1 by mechanical rotation (see, for example, FIGS. 10 and 11).
  • FIG. 3 is a diagram showing an example of the state of the projection area 11 before the adjustment of the projection unit 1.
  • the projection area 11 shown in FIG. 3 is a range in which the projection light is irradiated by the projection unit 1.
  • the projection area 11 is rectangular.
  • the projection area 11 is different in position and size from the screen 6.
  • the projection area 11 is adjusted so that the outer circumference of the projection area 11 and the outer circumference of the screen 6 match.
  • FIG. 4 is a diagram showing a first state of the projection area 11 during adjustment of the projection unit 1.
  • the user adjusts the projection area 11 so that one corner of the rectangular projection area 11 and one corner of the screen 6 match, as shown in FIG. To do.
  • One corner of the projection area 11 forms part of the end of the projection area 11.
  • This adjustment may be performed by changing the position or orientation of the projection unit 1, or by changing the projection optical system 22 (see FIG. 3). This adjustment can be easily performed because it is only necessary to pay attention to one corner.
  • the projection area 11 is adjusted so that the upper left corner of the projection area 11 and the upper left corner of the screen 6 match.
  • the positions of the upper left corner of the projection area 11 and the screen 6 are the position of a part of the edge of the projection area 11 to which the projection unit 1 irradiates the projected light and the specific position of the screen 6 (upper left corner). Consists of a first position that matches.
  • FIG. 5 is a diagram showing an example of the selection screen of the first fixed end portion.
  • the control device 4 displays, for example, the selection screen 50 shown in FIG. 5 to the user.
  • the selection screen 50 is displayed, for example, by a display (not shown) included in the projection device 10 or by projection on the screen 6 using the projection unit 1.
  • the selection screen 50 shows the four corners of the upper left, lower left, upper right, and lower right as candidates for the first fixed end.
  • the corners marked with ⁇ indicate the corners that are being tentatively selected, and the corners marked with ⁇ indicate the corners that are not being tentatively selected.
  • control device 4 When the control device 4 receives the selection switching operation from the user, the control device 4 changes the tentatively selected corner among the four corners. Further, when the control device 4 receives the determination operation from the user, the tentatively selected corner of the four corners is determined as the first fixed end portion.
  • These operations may be performed by an operation unit such as a button provided on the control device 4, may be performed by a remote controller or the like that remotely controls the control device 4, or may be performed by another method. You may.
  • the projection area 11 is adjusted so that the upper left corner of the projection area 11 and the upper left corner of the screen 6 match, so that the user selects as shown in FIG. Select the upper left on the screen 50.
  • the control device 4 can be made to detect that the lower left corner of the projection area 11 is the fixed end portion (first position).
  • FIG. 6 is a diagram showing a second state of the projection area 11 during adjustment of the projection unit 1.
  • the control device 4 When the control device 4 receives a scaling operation from the user after detecting the fixed end portion as shown in FIG. 5, the control device 4 maintains the position of the detected fixed end portion and the projection area 11 corresponding to the received scaling operation. Enlarge or reduce. In the example shown in FIG. 5, since the upper left corner is detected as the fixed end portion, the control device 4 maintains the position of the upper left corner of the projection area 11 and enlarges / reduces the projection area 11.
  • the expansion / contraction is performed with the center of the projection region 11 as the base point, and the position of the fixed end portion changed by the expansion / contraction is the original fixed end position (first position). It is realized by moving the projection area 11 so as to match.
  • the maintenance of the fixed end portion and the expansion / contraction of the projection region 11 may be realized by simultaneously performing these expansion / contraction and movement.
  • the control device 4 expands the projection area 11 so that the lower right corner of the projection area 11 moves in the lower right direction of the projection area 11.
  • the control device 4 expands the projection area 11 so as to spread in all directions from the center of the projection area 11 shown in FIG. 4, and the position of the upper left corner of the projection area 11 changed to the upper left by the expansion is before expansion.
  • the projection area 11 is moved to the lower right so as to return to the position of.
  • the control device 4 may perform these expansions and movements in the reverse order, or may perform these expansions and movements at the same time.
  • the projection area 11 can be easily adjusted as compared with the expansion / contraction in which all four corners of the projection area 11 move.
  • the scaling of the projection area 11 with one corner as a fixed end is performed, for example, while maintaining the aspect ratio of the projection area 11.
  • the projection area 11 and the screen 6 have different aspect ratios, only one of the upper right corner and the lower left corner of the projection area 11 can be matched with the edge of the screen 6.
  • the upper right corner of the projection area 11 coincides with the edge of the screen 6, but the lower left corner of the projection area 11 does not coincide with the edge of the screen 6. At this point, the upper left and upper right corners of the projection area 11 coincide with the edges of the screen 6.
  • FIG. 7 is a diagram showing an example of the selection screen of the second fixed end portion.
  • the control device 4 displays, for example, the selection screen 50 shown in FIG. 7 in the state shown in FIG.
  • the lower left and upper right corners adjacent to the upper left can be selected as candidates for the second fixed end on the selection screen 50.
  • the upper left and lower right corners are not selectable.
  • the control device 4 can be made to detect that the upper right corner of the projection area 11 is the second fixed end portion (second position).
  • FIG. 8 is a diagram showing a third state of the projection area 11 during adjustment of the projection unit 1.
  • the control device 4 When the control device 4 receives a scaling operation from the user after detecting the second fixed end portion as shown in FIG. 7, the received scaling operation is performed while maintaining the positions of the two fixed end portions detected.
  • the projection area 11 is enlarged or reduced according to the above. In the example shown in FIG. 7, since the upper left and upper right corners are detected as fixed ends, the control device 4 maintains the upper left and upper right corners of the projection area 11 and expands / contracts the projection area 11. I do.
  • control device 4 controls, for example, the scaling of the optical projection region 11 by changing the projection optical system 22 and the optical modulation unit 21b.
  • the expansion and contraction of the electronic projection region 11 according to the above is performed in combination.
  • the control device 4 expands the projection area 11 so that the lower side of the projection area 11 moves in the direction below the projection area 11.
  • the control device 4 expands the projection area 11 so as to spread in all directions from the center of the projection area 11 shown in FIG. 6, and the position of the upper left corner of the projection area 11 changed to the upper left by the expansion is before expansion.
  • the projection area 11 is moved to the lower right so as to return to the position of.
  • the control device 4 may perform these expansions and movements in the reverse order, or may perform these expansions and movements at the same time.
  • control device 4 controls the optical modulation unit 21b to electronically change the aspect ratio of the projection region 11 when the projection region 11 is expanded, thereby maintaining the position of the right side of the projection region 11. I do. As a result, the projection area 11 can be enlarged so that only the lower side of the projection area 11 moves.
  • the user performs an enlargement operation of the projection area 11 until the lower side of the projection area 11 coincides with the edge of the screen 6, so that the outer circumference of the projection area 11 and the outer circumference of the screen 6 are enlarged. Can be matched.
  • the projection region 11 By maintaining the fixed end portion and expanding / contracting the projection area 11 in this way, the user can see that the end portion (for example, the lower side) of the projection area 11 other than the fixed end portion (for example, the upper left and the upper right) is the screen 6. Since the scaling operation may be performed so as to coincide with the end portion of the projection region 11, the projection region 11 can be adjusted more easily than, for example, the scaling operation in which all four corners of the projection region 11 move.
  • FIG. 9 is a flowchart showing an example of processing by the control device 4.
  • the control device 4 executes, for example, the process shown in FIG. 9 when the projection area 11 with respect to the screen 6 is adjusted. First, the control device 4 determines whether or not the scaling operation has been accepted from the user (step S91).
  • step S91 When the scaling operation is accepted in step S91 (step S91: Yes), the control device 4 expands or contracts the projection area 11 according to the accepted scaling operation (step S92), and returns to step S91.
  • step S92 since the fixed end portion is not detected, the control device 4 expands or contracts the projection region 11 without maintaining the position of any end portion of the projection region 11.
  • step S91 If the scaling operation is not accepted in step S91 (step S91: No), the control device 4 determines whether or not the first fixed end is detected (step S93). If the first fixed end is not detected (step S93: No), the control device 4 returns to step S91.
  • step S93 determines whether or not the scaling operation has been accepted from the user (step S94).
  • step S94 When the scaling operation is accepted in step S94 (step S94: Yes), the control device 4 expands or contracts the projection area 11 according to the accepted scaling operation (step S95), and returns to step S94.
  • step S95 since one fixed end is detected, the control device 4 maintains the position of one fixed end of the projection area 11 and enlarges or reduces the projection area 11.
  • step S94: No If the scaling operation is not accepted in step S94 (step S94: No), the control device 4 determines whether or not the second fixed end is detected (step S96). If the second fixed end is not detected (step S96: No), the control device 4 returns to step S94.
  • step S96 determines whether or not the scaling operation has been accepted from the user (step S97).
  • step S97 When the scaling operation is accepted in step S97 (step S97: Yes), the control device 4 expands or contracts the projection area 11 according to the accepted scaling operation (step S98), and returns to step S97.
  • step S98 since the two fixed ends are detected, the control device 4 maintains the positions of the two fixed ends of the projection area 11 and enlarges or reduces the projection area 11.
  • step S97 determines whether or not the confirmation operation of the projection area 11 has been accepted from the user (step S99). When the confirmation operation is not accepted from the user (step S99: No), the control device 4 returns to step S97.
  • step S99 Yes
  • the control device 4 ends a series of processes.
  • the projection device 10 of the present embodiment detects that the position of a part of the end portion of the projection region 11 to which the projection unit 1 irradiates the projected light is the first position (for example, the end portion of the screen 6). In this state, the position of a part of the end portion is maintained, and the projection area 11 is enlarged or reduced. This makes it possible to easily adjust the projection area 11 with respect to the object to be projected.
  • FIG. 10 is a schematic view showing the external configuration of the projection device 10.
  • FIG. 11 is a schematic cross-sectional view of the optical unit 106 of the projection device 10 shown in FIG.
  • FIG. 11 shows a cross section of the light emitted from the main body 101 along the optical path.
  • the projection device 10 includes a main body portion 101 and an optical unit 106 provided so as to project from the main body portion 101.
  • the control device 4 the control unit 24, and the optical modulation unit 21b shown in FIGS. 1 and 2 are provided in the main body 101.
  • the projection optical system 22 shown in FIGS. 1 and 2 is provided in the optical unit 106.
  • the optical unit 106 includes a first member 102 supported by the main body 101 and a second member 103 supported by the first member 102.
  • the first member 102 and the second member 103 may be integrated members.
  • the optical unit 106 may be detachably configured (in other words, interchangeable) on the main body 101.
  • the main body 101 has a housing 15 (see FIG. 11) in which an opening 15a (see FIG. 11) for passing light is formed in a portion connected to the optical unit 106.
  • the light source 21a and the light modulation unit 21b (which generates an image by spatially modulating the light emitted from the light source 21a based on the input image data) (
  • An optical modulation unit 12 including (see FIG. 2) is provided inside the housing 15 of the main body 101.
  • the light emitted from the light source 21a is incident on the optical modulation unit 21b.
  • the image formed by the light spatially modulated by the optical modulation unit 12 passes through the opening 15a of the housing 15, is incident on the optical unit 106, and is projected onto the screen 6 as a projection object. Then, the image G1 becomes visible to the observer.
  • the optical unit 106 includes a first member 102 having a hollow portion 2A connected to the inside of the main body 101, a second member 103 having a hollow portion 3A connected to the hollow portion 2A, and a hollow portion 2A.
  • a shift mechanism 105 and a photographing direction changing mechanism 104 is arranged in the hollow portion 3A.
  • the first member 102 is a member having a rectangular cross-sectional outer shape as an example, and the openings 2a and 2b are formed on surfaces perpendicular to each other.
  • the first member 102 is supported by the main body 101 in a state where the opening 2a is arranged at a position facing the opening 15a of the main body 101.
  • the light emitted from the light modulation unit 21b of the light modulation unit 12 of the main body 101 passes through the openings 15a and 2a and is incident on the hollow portion 2A of the first member 102.
  • the incident direction of the light incident on the hollow portion 2A from the main body portion 101 is described as the direction X1, the opposite direction of the direction X1 is described as the direction X2, and the direction X1 and the direction X2 are collectively referred to as the direction X.
  • the direction from the front to the back of the paper and the opposite direction are described as the direction Z.
  • the direction from the front to the back of the paper is described as the direction Z1
  • the direction from the back to the front of the paper is described as the direction Z2.
  • the projection device 10 is arranged so that the direction Y2 is the vertical direction.
  • the projection optical system 22 shown in FIG. 2 is composed of a first optical system 121, a reflection member 122, a second optical system 31, a branch member 32, a third optical system 33, and a lens 34.
  • FIG. 11 shows the optical axis K of the projection optical system 22.
  • the first optical system 121, the reflective member 122, the second optical system 31, the branch member 32, the third optical system 33, and the lens 34 are arranged along the optical axis K in this order from the optical modulation unit 21b side.
  • the first optical system 121 includes at least one lens, and guides light traveling from the main body 101 to the first member 102 in the direction X1 to the reflecting member 122.
  • the reflecting member 122 reflects the light incident from the first optical system 121 in the direction Y1.
  • the reflective member 122 is composed of, for example, a mirror or the like.
  • the first member 102 has an opening 2b formed on the optical path of the light reflected by the reflecting member 122, and the reflected light passes through the opening 2b and proceeds to the hollow portion 3A of the second member 103.
  • the second member 103 is a member having a substantially T-shaped cross section, and an opening 3a is formed at a position facing the opening 2b of the first member 102.
  • the light from the main body 101 that has passed through the opening 2b of the first member 102 is incident on the hollow portion 3A of the second member 103 through the opening 3a.
  • the cross-sectional outer shape of the first member 102 and the second member 103 is arbitrary and is not limited to those described above.
  • the second optical system 31 includes at least one lens, and guides the light incident from the first member 102 to the branch member 32.
  • the branch member 32 reflects the light incident from the second optical system 31 in the direction X2 and guides it to the third optical system 33. Further, the branch member 32 transmits the subject light incident on the lens 34 from the screen 6 side and traveling in the direction X1 passing through the third optical system 33, and guides the subject light to the fourth optical system 37.
  • the branch member 32 is composed of, for example, a half mirror or a polarizing plate.
  • the third optical system 33 includes at least one lens, and guides the light reflected by the branch member 32 to the lens 34.
  • the lens 34 is arranged at this end so as to close the opening 3c formed at the end of the second member 103 on the direction X2 side.
  • the lens 34 projects the light incident from the third optical system 33 onto the screen 6.
  • the fourth optical system 37 includes at least one lens and is arranged next to the branch member 32 on the direction X1 side, and guides the subject light that passes through the branch member 32 and travels in the direction X1 to the image sensor 38.
  • the optical axis of the fourth optical system 37 and the optical axis of the lens 34 and the third optical system 33 are substantially coincident with each other.
  • the fourth optical system 37 may include a lens having a variable focal length.
  • the image sensor 38 is a CCD type image sensor, a MOS type image sensor, or the like.
  • the image sensor 38 images the screen 6 through the lens 34, the third optical system 33, the branch member 32, and the fourth optical system 37.
  • the lens 34, the third optical system 33, and the branch member 32 form a part of the projection optical system.
  • the image pickup unit 5 shown in FIG. 1 may be composed of an image pickup element 38 or another image pickup element.
  • the photographing direction changing mechanism 104 is a rotating mechanism that rotatably connects the second member 103 to the first member 102.
  • the second member 103 is rotatably configured around a rotation axis (specifically, an optical axis K) extending in the direction Y.
  • the photographing direction changing mechanism 104 is not limited to the arrangement position shown in FIG. 11 as long as the optical system can be rotated. Further, the number of rotation mechanisms is not limited to one, and a plurality of rotation mechanisms may be provided.
  • the shift mechanism 105 is a mechanism for moving the optical axis K (in other words, the optical unit 106) of the projection optical system in a direction perpendicular to the optical axis K (direction Y in FIG. 11). Specifically, the shift mechanism 105 is configured so that the position of the first member 102 in the direction Y with respect to the main body 101 can be changed.
  • the shift mechanism 105 may be one in which the first member 102 is manually moved, or one in which the first member 102 is electrically moved.
  • FIG. 11 shows a state in which the first member 102 is moved to the direction Y1 side as much as possible by the shift mechanism 105. From the state shown in FIG. 11, the first member 102 is moved in the direction Y2 by the shift mechanism 105, so that the center of the image (in other words, the center of the display surface) formed by the optical modulation unit 21b and the optical axis K are aligned with each other. The relative position changes, and the image G1 projected on the screen 6 can be shifted (translated) in the direction Y2.
  • the shift mechanism 105 may be a mechanism that moves the optical modulation unit 21b in the direction Y instead of moving the optical unit 106 in the direction Y. Even in this case, the image G1 projected on the screen 6 can be shifted in the direction Y2.
  • FIG. 12 is a diagram showing a modified example of the selection screen of the fixed end portion of the projection area 11.
  • the control device 4 may display the selection screen 50 shown in FIG. 12, for example, to the user.
  • the selection screen 50 shown in FIG. 12 shows four sides of the top, bottom, left, and right as candidates for fixed ends.
  • the user selects the upper side on the selection screen 50 in a state where the upper side of the projection area 11 matches the upper side of the projection area 11, so that the upper side is set to the first fixed end.
  • the control device 4 is made to detect as a unit.
  • the position of the upper side is maintained and the projection area 11 is scaled.
  • the projection area 11 is adjusted with respect to the screen 6 by expanding or contracting the projection area 11 while setting the side of the projection area 11 as the fixed end portion. It can be carried out.
  • a part of the end portion of the projection area 11 may be two adjacent corners of the projection area 11.
  • the user first aligns two adjacent corners of the projection area 11 (upper left and upper right, for example) with the edges of the screen 6, and then sets the two corners as fixed ends on the control device 4. Let it be detected.
  • the control device 4 performs a process of determining whether or not two fixed ends have been detected from the user, instead of, for example, steps S93 to S96 shown in FIG.
  • the detection method by user operation has been described as a method for the control device 4 to detect the fixed end portion, but the method is not limited to such a method.
  • the control device 4 identifies an end portion of the projection region 11 that coincides with the end portion of the screen 6 based on an image obtained by imaging the screen 6 using the imaging unit 5.
  • the specified end may be detected as a fixed end.
  • control device 4 detects an instruction (user instruction) from the user by a gesture using the user's finger based on the image obtained by imaging with the image pickup unit 5, and fixes the instruction based on the detection result.
  • the end may be detected.
  • the control device 4 detects the lower left corner of the projection area 11 as a fixed end portion. Further, when the control device 4 detects the finger of the user who is upside down in the L shape in the obtained image, the control device 4 detects the upper left corner of the projection area 11 as a fixed end portion. Further, when the control device 4 detects a user's finger having an L-shape that is opposite to the left and right in the obtained image, the control device 4 detects the lower right corner of the projection area 11 as a fixed end portion. Further, when the control device 4 detects the finger of the user in the L-shape that is upside down, left and right in the obtained image, the control device 4 detects the upper right corner of the projection area 11 as a fixed end portion.
  • control device 4 when the control device 4 detects a user's finger pointing in a specific direction in the obtained image, the control device 4 may detect the end portion in the specific direction in the projection area 11 as a fixed end portion.
  • control device 4 performs electronic scaling by controlling the optical modulation unit 21b instead of or in addition to the optical scaling by changing the projection optical system 22. May be good.
  • the electronic scaling by controlling the optical modulation unit 21b constitutes the scaling by controlling the projection image by the projection unit 1.
  • the aspect ratio of the projection area 11 before adjustment and the aspect ratio of the screen 6 are the same, it is not necessary to control the aspect ratio of the electronic projection area 11 (for example, steps S97 to S99 in FIG. 9). Is.
  • the projection area 11 is adjusted so that the outer circumference of the projection area 11 and the outer circumference of the screen 6 coincide with each other has been described.
  • the adjustment of the projection area 11 can be performed in any region of the screen 6. it can.
  • the adjustment unit adjusts the position of a part (for example, a corner) of the end portion of the projection area 11.
  • the configuration may be such that the screen 6 is aligned with a specific position (for example, a corner of the screen).
  • the adjusting unit may perform the positioning according to the user operation, or may perform the positioning based on, for example, the imaging data obtained by the imaging unit 5 without the user operation. Good.
  • the projection device executes control for maintaining the position of a part of the end portion and expanding or contracting the projection area in response to a user instruction. Projection device.
  • the projection device according to (1) or (2). It also has an imaging unit
  • the processor detects that the position of a part of the end of the projection region where the projection unit irradiates the projected light is the first position, and the position of the part of the end is detected by the imaging unit. And execute control to enlarge or reduce the projection area. Projection device.
  • the projection device according to any one of (1) to (3).
  • it is equipped with an adjustment unit.
  • the adjusting unit is a projection device that aligns a part of the end portion of the projection area where the projection unit irradiates the projected light with a specific position on the projection surface.
  • the projection device is a projection device in which the position of a part of the end portion of the projection area where the projection unit irradiates the projected light coincides with the specific position of the projection surface.
  • the projection device according to any one of (1) to (5).
  • the processor moves the projection area so that the position of a part of the end that changes due to the enlargement or reduction with respect to the center of the projection area matches the first position, thereby Execute control to maintain a part of the position and perform the above-mentioned enlargement or reduction. Projection device.
  • the projection device according to any one of (1) to (6).
  • the processor is a projection device that executes control for changing the optical system of the projection unit and control for changing the projected image by the projection unit to perform the enlargement or reduction by at least one of the two.
  • the projection device according to any one of (1) to (7).
  • the processor is a projection device that detects that a part of the end portion is the first position based on a user operation.
  • the projection device according to any one of (1) to (8).
  • the projection area is rectangular Part of the end is one corner of the projection area, Projection device.
  • the projection device according to any one of (1) to (10).
  • the projection area is rectangular Part of the end is two adjacent corners of the projection area. Projection device.
  • the projection device according to the above.
  • the processor maintains each position of the two corners in a state of detecting that each position of the two corners is the first position and the second position, respectively, and enlarges or reduces the projection area.
  • the projection device further includes an imaging unit. In a state where the imaging unit detects that the position of a part of the end portion of the projection region where the projection unit irradiates the projected light is the first position, the position of a part of the end portion is maintained. And the projection area is enlarged or reduced. Projection method.
  • the projection device further includes an adjustment unit.
  • the adjusting unit is a projection method for aligning a part of the end portion of a projection area where the projection unit irradiates the projected light with a specific position on the projection surface.
  • the first position is a projection method in which the position of a part of the end of the projection area where the projection unit irradiates the projected light coincides with the specific position of the projection surface.
  • the projection method according to any one of (13) to (22).
  • the projection area is rectangular Part of the end is two adjacent corners of the projection area. Projection method.
  • the projection unit detects that the position of a part of the end portion of the projection region to irradiate the projected light is the first position, the position of a part of the end portion is maintained and the position of the projection region is maintained.
  • a control program that lets a computer perform processing.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Projection Apparatus (AREA)
  • Controls And Circuits For Display Device (AREA)
PCT/JP2020/045519 2019-12-27 2020-12-07 投影装置、投影方法、及び制御プログラム Ceased WO2021131646A1 (ja)

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US17/831,516 US11889238B2 (en) 2019-12-27 2022-06-03 Projection apparatus, projection method, and control program

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