WO2023148974A1 - Dispositif d'affichage d'image et procédé de réglage du dispositif d'affichage d'image - Google Patents

Dispositif d'affichage d'image et procédé de réglage du dispositif d'affichage d'image Download PDF

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Publication number
WO2023148974A1
WO2023148974A1 PCT/JP2022/004702 JP2022004702W WO2023148974A1 WO 2023148974 A1 WO2023148974 A1 WO 2023148974A1 JP 2022004702 W JP2022004702 W JP 2022004702W WO 2023148974 A1 WO2023148974 A1 WO 2023148974A1
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WO
WIPO (PCT)
Prior art keywords
movable plate
wire member
display device
image display
image forming
Prior art date
Application number
PCT/JP2022/004702
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English (en)
Japanese (ja)
Inventor
優一 加藤
Original Assignee
シャープＮｅｃディスプレイソリューションズ株式会社
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.)
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Application filed by シャープＮｅｃディスプレイソリューションズ株式会社 filed Critical シャープＮｅｃディスプレイソリューションズ株式会社
Priority to PCT/JP2022/004702 priority Critical patent/WO2023148974A1/fr
Publication of WO2023148974A1 publication Critical patent/WO2023148974A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • 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

Definitions

  • the present invention relates to an image display device having a light modulation element and an adjustment method for the image display device.
  • a projection type image display device that projects an image synthesized based on a plurality of colored lights onto a screen or the like.
  • a projection-type image display apparatus for example, irradiates a plurality of color lights on the corresponding light modulation elements through different optical paths, synthesizes the images formed by the respective light modulation elements by a photosynthesis prism, and synthesizes the images by the photosynthesis prism. projected on a screen, etc.
  • Such an image display device synthesizes images formed by a plurality of colored lights to form one image. There is also a shift in the image that is displayed. In order to solve this problem, there is a known technique for adjusting the positions of the light modulation elements for each color.
  • Patent Document 1 discloses an image display device in which the position of the light modulation element can be adjusted by displacing the position of the light modulation element in a direction perpendicular to the optical axis direction.
  • Patent Document 2 discloses an image display device capable of adjusting the position of the light modulation element by displacing the position of the light modulation element in a direction perpendicular to the optical axis direction and in a direction parallel to the optical axis direction.
  • An apparatus is disclosed.
  • the image display device disclosed in Patent Document 1 can adjust the light modulation element only in the direction perpendicular to the optical axis direction, it cannot be adjusted in the direction parallel to the optical axis direction. In other words, the image display device disclosed in Patent Document 1 cannot adjust the focus of the image when the image is out of focus.
  • UV (Ultra Violet) adhesive is used to bond parts together in order to fix the positional relationship between the photosynthetic prism and the light modulation element.
  • An object of the present disclosure is to provide an image display device and an adjustment method for the image display device, which can fix the positional relationship between the photosynthetic prism and the light modulation element without using adhesion, and can adjust the position of the light modulation element. That is.
  • a light modulating element comprising an image forming surface that modulates light to form an image, a prism facing the light modulating element, a fixed plate fixed to the prism, and the fixed
  • a first movable plate is connected to the plate so as to be slidable in a direction parallel to the image forming surface; one end is connected to the fixed plate; the other end is rotatable; a first wire member capable of displacing the movable plate in a direction parallel to the image forming surface; a second movable plate holding the light modulation element; one end of which is connected to the first movable plate; a second wire member whose end is rotatable and which can be rotated to displace the second movable plate in a direction perpendicular to the image forming surface.
  • a light modulating element comprising an image forming surface that modulates light to form an image, a prism facing the light modulating element, a fixed plate fixed to the prism, a first movable plate connected to the fixed plate so as to be slidable in a direction parallel to the image forming surface; one end connected to the fixed plate; a first wire member that can displace the first movable plate in a direction parallel to the image forming surface; a second movable plate that holds the light modulation element; and one end of which is connected to the first movable plate.
  • a method for adjusting an image display device is provided for positioning in a direction normal to a plane.
  • FIG. 1 is a block diagram showing the configuration of an image display device according to an embodiment
  • FIG. 2 is a schematic diagram showing a specific configuration of the image display device of FIG. 1
  • FIG. 1 is a perspective view of a photosynthesis prism unit assembly according to the present embodiment
  • FIG. 4 is an exploded view showing an example of the configuration of a photosynthesis prism unit
  • FIG. 4 is a partial perspective view showing a connection mode between a first wire member and a fixing plate
  • It is a partial perspective view which shows the connection aspect of a 1st movable plate and a fixed plate.
  • It is a sectional view showing typically the connection aspect of the 1st movable plate and a fixed plate.
  • FIG. 1 is a block diagram showing the configuration of an image display device according to an embodiment
  • FIG. 2 is a schematic diagram showing a specific configuration of the image display device of FIG. 1
  • FIG. 1 is a perspective view of a photosynthesis prism unit assembly according to the present embodiment
  • FIG. 4 is
  • FIG. 4 is a partial perspective view showing a connection mode between a second wire member and a first movable plate; It is a partial perspective view which shows the connection aspect of a fixed plate, a 1st movable plate, and a 2nd movable plate.
  • FIG. 1 is a block diagram showing the configuration of an image display device 50 according to one embodiment.
  • the image display device 50 is a device that synthesizes images formed based on a plurality of colored lights with a photosynthesis prism and projects the synthesized image.
  • the image display device 50 can be configured by being included in a projector, for example.
  • the image display device 50 has a housing 51 .
  • the housing 51 in this embodiment is a mechanism that protects or holds each component of the image display device 50 . Therefore, the housing 51 does not necessarily have to have a box shape that forms the outer shape of the image display device 50.
  • the housing 51 may be a mechanism configured by a framework that holds each component included in the image display device 50. good.
  • the housing 51 may be configured as an outer box for the entire projector including the image display device 50
  • the housing 51 for the image display device 50 is an outer box for the projector configured separately from the housing 51 . It may be configured to be placed internally.
  • the image display device 50 does not necessarily have to include the housing 51 . In the present embodiment, the image display device 50 is assumed to include a housing 51 and will be described below.
  • the image display device 50 includes a light modulation element 52 having an image forming surface 52a that modulates light to form an image.
  • the light modulation element 52 is housed in the housing 51 .
  • the light modulation element 52 may be, for example, a DMD (Digital Mirror Device) or an LCD (Liquid Crystal Display).
  • the housing 51 has an operation surface 51 a that can be operated to adjust the position of the light modulation element 52 housed in the housing 51 .
  • the operation surface 51a is provided on the outer surface of the housing 51, for example.
  • the image display device 50 further includes a holding section 53 and an adjusting section 55 .
  • the holding portion 53 holds the light modulation element 52 so as to be displaceable at least in a direction perpendicular to the image forming surface 52a and a direction parallel to the image forming surface 52a. The details of the holding structure of the light modulation element 52 by the holding portion 53 will be described later.
  • the adjustment unit 55 is a mechanism that can adjust the position of the light modulation element 52 .
  • the adjustment portion 55 is configured including at least one wire member 54 .
  • One end 54a of the wire member 54 is connected to the holding portion 53, and the other end 54b is rotatably attached to the operation surface 51a.
  • the holding portion 53 has a movable portion 53a that is displaced (moved) in a direction perpendicular to or parallel to the image forming surface 52a by rotating the other end 54b of the wire member 54. As shown in FIG.
  • the other end 54b of the wire member 54 does not necessarily have to be attached to the operation surface 51a.
  • the other end 54b of the wire member 54 may be arranged so as to be rotatable by the user from outside the image display device 50 .
  • the housing 51 of the image display device 50 is arranged inside the outer box of the projector configured separately from the housing 51, when the user removes the outer box of the projector, the other end 54b
  • the other end 54b may be arranged at a position where it is possible to operate the .
  • a part of the outer box of the projector may be cut out, and the other end 54b may be arranged at a position where the user can operate from the cut out position. Therefore, the other end 54b may be arranged so as to be rotatable by the user at least from the outside of the image display device 50. As shown in FIG.
  • FIG. 2 is a schematic diagram showing a specific configuration of the image display device 50 of FIG. In FIG. 2, for convenience, only the configuration related to the characteristic portions of the image display device 50 is shown, and optical components including, for example, a light source, mirrors and lenses are omitted as appropriate.
  • the image display device 50 includes a housing 51 having an operation surface 51a.
  • the housing 51 accommodates three optical modulation elements 52R, 52G, and 52B as the optical modulation elements 52.
  • the light modulation elements 52R, 52G and 52B form images of different color lights.
  • the light modulation element 52R modulates red light to form a red image.
  • the light modulation element 52G modulates green light to form a green image.
  • the light modulation element 52B modulates the blue light to form a blue image.
  • the optical modulation elements 52 when the three optical modulation elements 52R, 52G and 52B are not distinguished, they are simply referred to as "the optical modulation elements 52".
  • the number of light modulation elements 52 included in the image display device 50 does not necessarily have to be three.
  • the image display device 50 may include any plurality of light modulation elements 52 .
  • the image display device 50 further includes a photosynthesis prism 56 .
  • the photosynthetic prism 56 is fixed to the housing 51 inside the housing 51 .
  • Light combining prism 56 faces light modulating element 52 .
  • the light combining prism 56 may be arranged near the light modulation element 52 .
  • the light combining prism 56 combines the images formed by the light modulation elements 52 .
  • the light synthesizing prism 56 may synthesize images respectively formed by a plurality of light modulating elements (here, three light modulating elements 52R, 52G and 52B). That is, the light synthesizing prism 56 color-synthesizes the respective color images formed by the light modulation elements 52R, 52G, and 52B into one image.
  • a single image is formed by synthesizing the images by the photosynthesis prism 56 .
  • the image display device 50 further includes a projection lens 57.
  • a projection lens 57 projects the image synthesized by the photosynthesis prism 56 onto a screen (not shown).
  • the image display device includes three holding portions 53R, 53G and 53B as the holding portion 53.
  • the holding portion 53 is housed in the housing 51 .
  • the light modulation elements 52R, 52G and 52B are attached to holding portions 53R, 53G and 53B, respectively.
  • the image display device 50 according to the present embodiment includes two adjustment units 55R and 55G as the adjustment unit 55, as shown in FIG.
  • the adjusters 55R and 55G adjust the positions of the light modulation elements 52R and 52G, respectively.
  • holding portions 53 when the three holding portions 53R, 53G and 53B are not distinguished, they are simply referred to as "holding portions 53".
  • adjustment unit 55 when not distinguishing between the two adjustment units 55R and 55G, they are simply referred to as "adjustment unit 55".
  • the holding section 53R holds the light modulation element 52R displaceably in directions perpendicular to and parallel to the image forming surface of the light modulation element 52R.
  • the direction perpendicular to the image forming surface is the direction of the optical axis
  • the direction parallel to the image forming surface is the direction perpendicular to the optical axis.
  • the adjusting section 55R is configured so that the user of the image display device 50 can adjust the amount of displacement of the light modulation element 52R on the holding section 53R from the operation surface 51a.
  • the holding portion 53G holds the light modulation element 52G so as to be displaceable in directions perpendicular to and parallel to the image forming surface of the light modulation element 52G.
  • the adjustment section 55G is configured so that the user of the image display device 50 can adjust the amount of displacement of the light modulation element 52G on the holding section 53G from the operation surface 51a.
  • FIG. 3 is a perspective view of the photosynthesis prism unit assembly 60 according to this embodiment.
  • the light combining prism unit assembly 60 includes the light modulation element 52, the holding section 53, the wire member 54, and the light combining prism 56 described with reference to FIGS.
  • the photosynthesis prism unit assembly 60 includes three photosynthesis prism units. That is, the photosynthesis prism unit assembly 60 includes a first photosynthesis prism unit 21R, a second photosynthesis prism unit 21G, and a third photosynthesis prism unit 21B. Each photosynthesis prism unit is a unit for forming an image of a specific color light. That is, in this embodiment, the three photosynthesis prism units 21R, 21G, and 21B are units for forming a red image, a green image, and a blue image, respectively.
  • the first light synthesizing prism unit 21R includes the light modulation element 52R, the holding section 53R, and the adjustment section 55R described with reference to FIG.
  • the second light synthesizing prism unit 21G includes an optical modulation element 52G, a holding section 53G, and an adjustment section 55G.
  • the third light synthesizing prism unit 21B includes an optical modulation element 52B and a holding portion 53B.
  • the first photosynthetic prism unit 21R includes a first electric substrate 9R.
  • the second photosynthetic prism unit 21G includes a second electric board 9G.
  • the third photosynthetic prism unit 21B includes a third electric board 9B.
  • the first electric board 9R includes a circuit necessary for driving the light modulation element 52R, and is attached to the holding portion 53R.
  • the second electric board 9G includes circuits necessary for driving the light modulation element 52G, and is attached to the holding portion 53G.
  • the third electric board 9B includes circuits necessary for driving the light modulation element 52B, and is assembled to the holding portion 53B.
  • the adjuster 55R is composed of three first wire members 1Ra, 1Rb and 1Rc and four second wire members 2Ra, 2Rb, 2Rc and 2Rd shown in FIG.
  • the first wire members 1Ra, 1Rb and 1Rc are used for pixel position adjustment by displacing the light modulation element 52R in a direction parallel to the image forming surface (direction perpendicular to the optical axis).
  • the second wire members 2Ra, 2Rb, 2Rc, and 2Rd are used for focus adjustment by displacing the light modulation element 52R in a direction (optical axis direction) perpendicular to the image forming surface.
  • the adjustment section 55G is composed of three first wire members 1Ga, 1Gb and 1Gc and four second wire members 2Ga, 2Gb, 2Gc and 2Gd.
  • the first wire members 1Ga, 1Gb and 1Gc are used for pixel position adjustment to displace the light modulation element 52G in a direction parallel to the image forming surface.
  • the second wire members 2Ga, 2Gb, 2Gc and 2Gd are used for focus adjustment by displacing the light modulation element 52G in the direction perpendicular to the image forming surface.
  • FIG. 4 is an exploded view showing an example of the configuration of the photosynthesis prism unit. Specifically, FIG. 4 is an example of an exploded view of the first photosynthesis prism unit 21R or the second photosynthesis prism unit 21G.
  • the first photosynthesis prism unit 21R and the second photosynthesis prism unit 21G may be configured similarly.
  • the first photosynthesis prism unit 21R and the second photosynthesis prism unit 21G are referred to as "lightsynthesis prism unit 21".
  • first wire member 1Ra and the first wire member 1Ga are described as “first wire member 1a”.
  • first wire member 1Rb and the first wire member 1Gb are referred to as the "first wire member 1b”
  • first wire member 1Rc and the first wire member 1Gc are referred to as the "first wire member 1c”. Describe.
  • the second wire members 2Ra and 2Ga are referred to as “second wire members 2a,” and the second wire members 2Rb and 2Gb are referred to as “second wire members.”
  • 2 wire member 2b the second wire member 2Rc and the second wire member 2Gc are described as the “second wire member 2c”
  • the second wire member 2Rd and the second wire member 2Gd are described as the “second 2-wire member 2d”.
  • first wire member 1 when the first wire members 1a, 1b and 1c are not distinguished, they are simply referred to as "first wire member 1".
  • second wire member 2 when the second wire members 2a, 2b, 2c and 2d are not distinguished, they are simply referred to as "second wire member 2".
  • first electric board 9R and the second electric board 9G are not distinguished from each other, they are simply referred to as the "electric board 9".
  • the photosynthesis prism unit 21 includes a fixed plate 4 , a first movable plate 6 and a second movable plate 7 as holding portions 53 . That is, the fixed plate 4 , the first movable plate 6 , and the second movable plate 7 are members forming the holding portion 53 . In particular, the first movable plate 6 and the second movable plate 7 are members that constitute the movable portion 53 a of the holding portion 53 .
  • the fixing plate 4 is composed of two members, a first member 4a and a second member 4b.
  • first member 4a and the second member 4b are simply referred to as "fixing plate 4".
  • the fixing plate 4 is housed inside the housing 51 . Specifically, the fixed plate 4 is fixed to the light combining prism 56 inside the housing 51 . Therefore, the fixed plate 4 is not relatively displaced with respect to the photosynthetic prism 56 .
  • the first movable plate 6 is composed of two members, a first member 6a and a second member 6b.
  • first member 6a and the second member 6b are simply referred to as "the first movable plate 6".
  • the first movable plate 6 is slidably connected to the fixed plate 4 . Specifically, the first movable plate 6 is connected to the fixed plate 4 so as to be slidable with respect to the fixed plate 4 in a direction parallel to the image forming surface. Therefore, the first movable plate 6 is relatively displaceable with respect to the fixed plate 4 . A specific method of connecting the fixed plate 4 and the first movable plate 6 will be described later.
  • the first member 6 a of the first movable plate 6 is fixed to the first member 4 a of the fixed plate 4 .
  • the second member 6 b of the first movable plate 6 is fixed to the second member 4 b of the fixed plate 4 .
  • the second movable plate 7 holds the light modulation element 52 .
  • an opening is formed in the center of the second movable plate 7 for attaching the light modulation element 52 .
  • the light modulation element 52 is held by the second movable plate 7 by being attached to the opening.
  • the photosynthesis prism unit 21 includes a first wire member 1 and a second wire member 2 as wire members 54 .
  • first wire member 1 is connected to the fixed plate 4 .
  • the other end of the first wire member 1 is configured to be rotatable.
  • the other end of the first wire member 1 may be rotatably attached to the housing 51, for example.
  • the first wire members 1a and 1b are connected to the first member 4a of the fixed plate 4, and the first wire member 1c is connected to the second member 4b of the fixed plate 4, as shown in FIG. be done.
  • the three first wire members 1 a , 1 b and 1 c are all connected to the fixed plate 4 in a direction perpendicular to the optical axis 5 .
  • the first wire members 1a and 1b and the first wire member 1c are connected to the fixed plate 4 from directions that cross each other.
  • the first wire members 1a and 1b and the first wire member 1c may be coupled to the fixed plate 4, in particular from mutually orthogonal directions.
  • the first wire member 1 functions as a wire member 54 for pixel position adjustment. Specifically, the first wire member 1 can rotate to displace the first movable plate 6 in a direction parallel to the image forming surface. That is, when the user rotates the other end of the first wire member 1, the first movable plate 6 is displaced in a direction parallel to the image forming surface.
  • the first movable plate 6 can be displaced in a first direction perpendicular to the optical axis 5 by rotating the other end of the first wire member 1a.
  • the first movable plate 6 can be displaced in a second direction orthogonal to the optical axis 5 and orthogonal to the first direction.
  • the first movable plate 6 can be displaced in the rotational direction with the direction of the optical axis 5 as the axial direction.
  • the image forming surface of the light modulation element 52 has a plurality of pixels arranged in a matrix, for example.
  • the first direction corresponds to the row direction of the pixel
  • the second direction corresponds to the column direction of the pixel.
  • One end of the second wire member 2 is connected to the first movable plate 6 .
  • one end of the second wire member 2 is connected to the first movable plate 6 while passing through a through hole provided in the second movable plate 7 . That is, the second movable plate 7 is connected to the first movable plate 6 using the second wire member 2 .
  • Four second wire members 2 a , 2 b , 2 c and 2 d are connected to the first movable plate 6 in a direction parallel to the optical axis 5 .
  • the electric board 9 is arranged on the side opposite to the first movable plate 6 with respect to the second movable plate 7 .
  • the other end of the second wire member 2 is configured to be rotatable.
  • the other end of the second wire member 2 may be rotatably attached to the housing 51, for example.
  • the second wire member 2 functions as a wire member 54 for focus adjustment.
  • the second wire member 2 can rotate to displace the second movable plate 7 in a direction perpendicular to the image forming surface. That is, when the user rotates the other end of the second wire member 2, the second movable plate 7 is displaced in the direction perpendicular to the image forming surface.
  • the second movable plate 7 is displaced in the direction along the optical axis 5 (the direction perpendicular to the image forming surface). be able to.
  • a specific mechanism for displacing the second movable plate 7 by the second wire member 2 will be described later.
  • FIG. 5 is a partial perspective view showing how the first wire member 1 and the fixing plate 4 are connected.
  • FIG. 5 is a perspective view of the photosynthesis prism unit 21 as seen from the fixing plate 4 side.
  • the front side of the drawing is the side where the fixing plate 4 is arranged
  • the back side of the drawing is the side where the electric board 9 is arranged.
  • the first movable plate 6 has three through holes, and one first wire member 1 is passed through each through hole. That is, a total of three first wire members 1 are passed through the first movable plate 6 .
  • the first member 6a of the first movable plate 6 has two through holes, and as shown in FIG. passes through the through-hole.
  • FIG. 5 only a part of the light combining prism unit 21 is shown, so only two first wire members 1a and 1b are shown in FIG.
  • the photosynthesis prism unit 21 is further provided with one first wire member 1c.
  • the first wire member 1c is provided so as to pass through the through-hole of the second member 6b of the first movable plate 6 from a direction intersecting (perpendicular to in this embodiment) the first wire members 1a and 1b. good.
  • the connection mode of the first wire member 1c (not shown) is also the same as the connection mode described here with reference to FIG.
  • the through-hole of the first movable plate 6 is formed in a direction orthogonal to the optical axis 5 (that is, a direction parallel to the image forming surface). That is, the first wire member 1 is passed through the first movable plate 6 in a direction perpendicular to the optical axis 5 . One end of the first wire member 1 passing through the first movable plate 6 is connected to the fixed plate 4 .
  • a first contact member 11 is provided on the first wire member 1 .
  • the first contact member 11 contacts the surface of the first movable plate 6 opposite to the fixed plate 4 side.
  • the first contact member 11 may be fixed to the first wire member 1 .
  • a first elastic member 10 is provided between the portion of the first movable plate 6 where the through hole is formed and the fixed plate 4 .
  • the first elastic member 10 biases the first movable plate 6 toward the first contact member 11 .
  • the first elastic member 10 can be configured by, for example, a coil spring. That is, one end of the first wire member 1 is connected to the fixed plate 4 , and the first wire member 1 includes a first elastic member 10 and a first elastic member 10 in order from one end along a direction orthogonal to the optical axis 5 .
  • a movable plate 6 and a first contact member 11 are arranged.
  • the first movable plate 6 and the fixed plate 4 are biased away from each other by the elastic force of the first elastic member 10, and the first contact member 11 prevents the biased first movable plate 6 from being displaced. , the first movable plate 6 is held down. That is, the first contact member 11 limits the displacement of the first movable plate 6 in the direction orthogonal to the optical axis 5 .
  • a male screw 12 is formed on the outer surface of one end of the first wire member 1 .
  • the fixing plate 4 has a first hole at a position where one end of the first wire member 1 is connected.
  • the fixed plate 4 has a first hole at a position facing the through hole of the first movable plate 6 .
  • a female screw is formed on the inner surface of the first hole.
  • a female screw that meshes with the male screw 12 of the first wire member 1 is formed in the first hole of the fixing plate 4 .
  • the first wire member 1 is connected to the fixing plate 4 by screwing the male screw 12 at one end into the female screw of the fixing plate 4 .
  • the other end of the first wire member 1 is rotatably attached to the operation surface 51a.
  • the other end of the first wire member 1 is rotated while the male thread 12 of the first wire member 1 is engaged with the female thread of the first hole of the fixing plate 4 (in a threaded state).
  • the first movable plate 6 can be displaced in the direction parallel to the image forming surface.
  • the thrust of the screw displaces the first movable plate 6 in a direction approaching the fixed plate 4 .
  • the elastic force of the first elastic member 10 displaces the first movable plate 6 away from the fixed plate 4 .
  • the first movable plate 6 can be displaced in a direction perpendicular to the optical axis 5 (that is, in a direction parallel to the image forming surface).
  • the second movable plate 7 connected to the first movable plate 6 is also displaced in the direction parallel to the image forming surface. Displace.
  • the light modulation element 52 held by the second movable plate 7 is also displaced in the direction parallel to the image forming surface. Therefore, pixel position adjustment of the image can be performed.
  • FIG. 6 is a partial perspective view showing how the first movable plate 6 and the fixed plate 4 are connected.
  • FIG. 7 is a cross-sectional view schematically showing how the first movable plate 6 and the fixed plate 4 are connected. Specifically, FIG. 7 is a cross-sectional view of a section through fixing screw 16 .
  • a metal plate 58 is adhered to the photosynthetic prism 56 .
  • the fixed plate 4 is fixed to the metal plate 58 .
  • the fixing plate 4 is fixed to the metal plate 58 by, for example, one or more fixing screws 13 (see FIG. 9). Therefore, the photosynthetic prism 56, the metal plate 58, and the fixed plate 4 are fixed to each other.
  • the first movable plate 6 is connected to the fixed plate 4 by a fixing screw 16.
  • the first movable plate 6 is provided with a fixing through hole 6c.
  • the fixing plate 4 is provided with a fixing through hole 4c.
  • the metal plate 58 is provided with bottomed fixing holes 58a.
  • a female screw that engages with a male screw formed on the outer surface of the tip of the fixing screw 16 is formed on the inner surface of the fixing bottomed hole 58 a of the metal plate 58 .
  • both the inner diameter of the fixing through-hole 6c of the first movable plate 6 and the inner diameter of the fixing through-hole 4c of the fixing plate 4 are larger than the outer diameters of the barrel and threaded portion of the fixing screw 16 .
  • the first movable plate 6 is connected to the fixed plate 4 by passing the fixing screws 16 through the fixing through holes 4c. Specifically, in the first movable plate 6 , the fixing screw 16 is passed through the fixing through hole 6 c of the first movable plate 6 and the fixing through hole 4 c of the fixing plate 4 , and the fixing screw 16 is inserted into the metal plate 58 . It is connected to the fixed plate 4 by screwing into the . That is, when the fixing screw 16 is screwed into the metal plate 58 , the fixing screw 16 is passed through the fixing through-hole 6 c of the first movable plate 6 , so that the first movable plate 6 is attached to the head of the fixing screw 16 . and the fixed plate 4.
  • the first movable plate 6 is fastened together with the fixed plate 4 by the fixing screws 16 .
  • the first movable plate 6 is thereby connected to the fixed plate 4 .
  • a screw locking agent may be applied to the tip of the fixing screw 16, that is, the portion where the male thread is formed.
  • a constant tightening torque of the fixing screw 16 can be maintained by the thread locking agent.
  • the fixing screw 16 is screwed into the metal plate 58 with a tightening torque that allows the first movable plate 6 to slide relative to the fixing plate 4 in the direction parallel to the image forming surface.
  • the first movable plate 6 can be displaced in the direction parallel to the image forming surface without being displaced in the direction in which the fixing screw 16 is inserted into the metal plate 58 (that is, in the direction perpendicular to the image forming surface).
  • the first movable plate 6 can be displaced in a direction parallel to the image forming surface within a range in which the inner wall of the fixing through-hole 4c and the body of the fixing screw 16 do not contact each other.
  • the inner diameter of the fixing through-hole 4c of the first movable plate 6 is Di
  • the outer diameter of the body of the fixing screw 16 is Do. Since the inner diameter Di of the fixing through-hole 4c is larger than the outer diameter Do of the barrel portion of the fixing screw 16, Di>Do.
  • the first movable plate 6 can slide in the direction parallel to the image forming surface with respect to the fixed plate 4 at the difference between the inner diameter Di and the outer diameter Do. .
  • the difference (Di-Do) between the inner diameter Di and the outer diameter Do is the movable distance of the first movable plate 6 .
  • the movable distance may be determined as appropriate. For example, it is preferable that the movable distance is set to ⁇ 10 pixels or more in pixels of the light modulation element 52 . For example, when the pixel pitch of the light modulation element 52 is 7.5 ⁇ m, the movable distance is preferably ⁇ 75 ⁇ m or more.
  • one or more washers may be arranged between the head of the fixing screw 16 and the first movable plate 6 when screwing the fixing screw 16 to the metal plate 58 .
  • four washers ie, a first washer 59a, a second washer 59b, a third washer 59c and a fourth washer 59d are provided between the head of the fixing screw 16 and the first movable plate 6. are placed.
  • FIG. 8 is a partial perspective view showing how the second wire member 2 and the first movable plate 6 are connected.
  • FIG. 8 is a perspective view of the second wire member 2 in which one end connected to the first movable plate 6 is shown below and the other end attached to the operation surface 51a is shown above.
  • FIG. 8 is a perspective view of the photosynthesis prism unit 21 viewed from one end of the second wire member 2 .
  • the second movable plate 7 has four through holes, and one second wire member 2 is passed through each through hole. That is, a total of four second wire members 2 are passed through the second movable plate 7 .
  • the through hole of the second movable plate 7 is formed in a direction parallel to the optical axis 5 (that is, a direction perpendicular to the image forming surface). That is, the first wire member 1 is passed through the first movable plate 6 in a direction perpendicular to the optical axis 5 .
  • One end of the second wire member 2 passing through the second movable plate 7 is connected to the first movable plate 6 .
  • the photosynthesis prism unit 21 includes three second wire members 2 arranged in the same direction as the illustrated second wire member 2. is provided.
  • the connection mode of the three second wire members 2 (not shown) is the same as the connection mode described here with reference to FIG. 8 .
  • a second contact member 14 is provided on the second wire member 2 .
  • the second contact member 14 contacts the surface of the second movable plate 7 opposite to the first movable plate 6 side.
  • the second contact member 14 may be fixed to the second wire member 2 .
  • a second elastic member 8 is provided between the portion of the second movable plate 7 where the through hole is formed and the first movable plate 6 .
  • the second elastic member 8 biases the second movable plate 7 toward the second contact member 14 side.
  • the second elastic member 8 can be composed of, for example, a coil spring.
  • one end of the second wire member 2 is connected to the first movable plate 6, and along the direction of the optical axis 5, the second wire member 2 is provided with a second elastic member 8 and a second elastic member 8 in order from one end side.
  • a movable plate 7 and a second contact member 14 are arranged.
  • the second movable plate 7 and the first movable plate 6 are biased away from each other by the elastic force of the second elastic member 8, and the second abutment member 14 causes the biased second movable plate 7 to
  • the second movable plate 7 is restrained so as not to be displaced. That is, the second contact member 14 limits displacement of the second movable plate 7 in the direction of the optical axis 5 .
  • a male screw 15 is formed on the outer surface of one end of the second wire member 2 .
  • the first movable plate 6 has a second hole at a position where one end of the second wire member 2 is connected.
  • the first movable plate 6 has a second hole at a position facing the through hole of the second movable plate 7 .
  • a female screw is formed on the inner surface of the second hole.
  • a female screw that meshes with the male screw 15 of the second wire member 2 is formed in the second hole of the first movable plate 6 .
  • the second wire member 2 is connected to the first movable plate 6 by screwing the male screw 15 at one end into the female screw of the first movable plate 6 .
  • the other end of the second wire member 2 is rotatably attached to the operation surface 51a.
  • the male screw 15 of the second wire member 2 is engaged with the female screw of the second hole of the first movable plate 6 (in a screwed state), and the other end of the second wire member 2 is By rotating , the second movable plate 7 can be displaced in a direction perpendicular to the image forming surface.
  • the thrust of the screw displaces the second movable plate 7 in a direction approaching the first movable plate 6 .
  • the elastic force of the second elastic member 8 displaces the second movable plate 7 away from the first movable plate 6 .
  • the second movable plate 7 can be displaced in a direction parallel to the optical axis 5 (that is, a direction perpendicular to the image forming surface). Thereby, focus adjustment of the image can be performed.
  • FIG. 9 is a partial perspective view showing how the fixed plate 4, the first movable plate 6 and the second movable plate 7 are connected.
  • FIG. 9 is a perspective view of the second wire member 2 in which one end connected to the first movable plate 6 is shown on the bottom side, and the other end side attached to the operation surface 51a is shown on the top side.
  • FIG. 9 is a perspective view of the photosynthesis prism unit 21 as seen from the other end side of the second wire member 2 .
  • the fixed plate 4 is fixed to the photosynthetic prism 56 .
  • the fixed plate 4 is fixed to a metal plate 58 adhered to the photosynthetic prism 56 .
  • the first movable plate 6 is slidably connected to the fixed plate 4 with a fixing screw 16 .
  • a first wire member 1 passing through a through hole of a first movable plate 6 is connected to the fixed plate 4 in a direction orthogonal to the optical axis 5 .
  • a second wire member 2 passing through a through hole of a second movable plate 7 is connected to the first movable plate 6 in a direction parallel to the optical axis 5 .
  • the second movable plate 7 holds the light modulation element 52 .
  • the second movable plate 7 is not adhered to the fixed plate 4 and the first movable plate 6 . Therefore, the positional relationship between the light modulation element 52 and the fixed plate 4 and the first movable plate 6 is fixed without using an adhesive.
  • the user can rotate the other end of the first wire member 1 on the operation surface 51a clockwise or counterclockwise to adjust the relative pixel position deviation between the images of each color.
  • the photosynthesis prism unit 21 it is possible to adjust the displacement of the pixel positions of the red image and the green image with respect to the blue image.
  • the displacement of the pixel position of the red image by rotating the other end of the first wire members 1Ra, 1Rb and 1Rc (for example, the first wire member 1 shown in FIG. 9) of the adjusting section 55R, 1 Displace the first movable plate 6 of the light combining prism unit 21R in a direction parallel to the image forming surface.
  • the second movable plate 7 connected to the first movable plate 6 is displaced together with the first movable plate 6, whereby the second movable plate 7 is displaced in the direction parallel to the image forming surface, positional deviation of pixels in the row direction, column direction and rotation direction can be adjusted.
  • the column direction and row direction of the pixels may correspond to the other direction and the horizontal direction on the projected screen, respectively.
  • the displacement of the pixel position of the green image can also be adjusted in the same manner.
  • the user can rotate the other end of the second wire member 2 on the operation surface 51a clockwise or counterclockwise to adjust the positional deviation (focus) between the images of each color in the optical axis direction.
  • the photosynthesis prism unit 21 it is possible to adjust the positional deviation of the red image and the green image in the optical axis direction with respect to the blue image.
  • the other ends of the second wire members 2Ra, 2Rb, 2Rc, and 2Rd (for example, the second wire member 2 shown in FIG. 9) of the adjusting portion 55R are rotated.
  • the second movable plate 7 of the first photosynthetic prism unit 21R is displaced in the direction perpendicular to the image forming surface.
  • the light modulation element 52R held by the second movable plate 7 is displaced in the direction perpendicular to the image forming surface, so that positional deviation in the optical axis direction can be adjusted.
  • the positional deviation of the green image in the optical axis direction can also be adjusted in the same manner.
  • the second movable plate 7 when the user rotates the second wire member 2 for focus adjustment, the second movable plate 7 is positioned perpendicular to the image forming surface. direction, but the first movable plate 6 is not displaced. Therefore, in the image display device 50, even if focus adjustment is performed, the pixel position does not move. That is, focus adjustment can be performed independently of pixel position adjustment.
  • the user first rotates the first wire member 1 so that the first movable plate 6 rotates in a direction parallel to the image forming surface. After positioning, it is preferable to position the second movable plate 7 in the direction perpendicular to the image forming surface by rotating the second wire member 2 . That is, it is preferable to first displace the first movable plate 6 to adjust the displacement of the pixel position, and then displace the second movable plate 7 to adjust the displacement in the optical axis direction.
  • the positional deviation in the optical axis direction is adjusted first, and then the pixel positional deviation is adjusted, the positional deviation in the optical axis direction occurs again in the process of adjusting the pixel positional deviation. This is because there is a possibility that it may become necessary to adjust the positional deviation of the .
  • the second movable plate 7 holding the light modulation element 52 is fixed without being adhered to the fixed plate 4 and the first movable plate 6 . Therefore, the image display device 50 can fix the positional relationship between the photosynthesis prism 56 and the light modulation element 52 without adhesive. As a result, the production efficiency of the image display device 50 can be improved, and the production cost can be reduced.
  • the image display device 50 can adjust the position of the light modulation element 52 from the outside of the image display device 50 . Specifically, the image display device 50 operates the other end of the first wire member 1 and the second wire member 2 attached to the operation surface 51a, thereby causing the light modulation element 52 to move parallel to the image forming surface. Directional and vertical position adjustments can be made. Accordingly, the image display device 50 can adjust the pixel position without dismantling the device.
  • the portion that was conventionally fixed by adhesion is replaced with a mechanism for adjusting the focus, thereby enabling the light combining prism 56 and the light modulation element 52 to be connected without adhesion. While fixing the positional relationship, the position adjustment of the light modulation element 52, especially the focus adjustment can be performed.
  • the image display device 50 of the present embodiment is an example of the present disclosure, and its configuration can be changed as appropriate.
  • the image display device 50 may further include, as the adjusting section 55, an adjusting section 55B that adjusts the position of the light modulation element 52B that forms the blue image.
  • the adjustment section 55B may have the same configuration as the adjustment sections 55R and 55G described above.
  • the numbers of the first wire members 1 and the second wire members 2 included in the photosynthesis prism unit 21 were described as three and four, respectively. is not limited to this.
  • the photosynthesis prism unit 21 may include at least one first wire member and at least one second wire member.
  • the image display device 50 disclosed in the present specification can be applied to general display devices including light modulation elements.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optics & Photonics (AREA)
  • Projection Apparatus (AREA)

Abstract

Un dispositif d'affichage d'image comprend : un élément de modulation de lumière doté d'une surface de formation d'image qui module la lumière pour former une image ; un prisme qui fait face à l'élément de modulation de lumière ; une plaque fixe fixée au prisme ; une première plaque mobile reliée à la plaque fixe de façon à pouvoir coulisser dans une direction parallèle à la surface de formation d'image ; un premier élément de fil dont une extrémité est reliée à la plaque fixe et dont l'autre extrémité peut tourner, et qui est capable de déplacer la première plaque mobile dans une direction parallèle à la surface de formation d'image par rotation ; une seconde plaque mobile qui maintient l'élément de modulation de lumière ; et un second élément de fil dont une extrémité est reliée à la première plaque mobile et dont l'autre extrémité peut tourner, et qui est capable de déplacer la seconde plaque mobile dans une direction perpendiculaire à la surface de formation d'image par rotation.
PCT/JP2022/004702 2022-02-07 2022-02-07 Dispositif d'affichage d'image et procédé de réglage du dispositif d'affichage d'image WO2023148974A1 (fr)

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PCT/JP2022/004702 WO2023148974A1 (fr) 2022-02-07 2022-02-07 Dispositif d'affichage d'image et procédé de réglage du dispositif d'affichage d'image

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PCT/JP2022/004702 WO2023148974A1 (fr) 2022-02-07 2022-02-07 Dispositif d'affichage d'image et procédé de réglage du dispositif d'affichage d'image

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05281509A (ja) * 1992-04-06 1993-10-29 Fujitsu Ltd 投写型液晶表示装置
JP2001215641A (ja) * 2000-02-01 2001-08-10 Canon Inc 投射型表示装置
KR20030035779A (ko) * 2002-04-23 2003-05-09 제이비옵틱스 주식회사 프로젝션 텔레비젼용 액정소자 조정장치
US20050195504A1 (en) * 2004-03-02 2005-09-08 Alexander Von Poncet Adjustable convergence device for a projector and projector equipped with such a convergence device
JP2011227404A (ja) * 2010-04-22 2011-11-10 Sony Corp 光学装置及び投影装置
JP2015215416A (ja) * 2014-05-08 2015-12-03 富士通株式会社 プロジェクタ装置
JP2016118659A (ja) * 2014-12-22 2016-06-30 キヤノン株式会社 画像表示装置
WO2021152827A1 (fr) * 2020-01-31 2021-08-05 シャープＮｅｃディスプレイソリューションズ株式会社 Dispositif d'affichage d'image

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05281509A (ja) * 1992-04-06 1993-10-29 Fujitsu Ltd 投写型液晶表示装置
JP2001215641A (ja) * 2000-02-01 2001-08-10 Canon Inc 投射型表示装置
KR20030035779A (ko) * 2002-04-23 2003-05-09 제이비옵틱스 주식회사 프로젝션 텔레비젼용 액정소자 조정장치
US20050195504A1 (en) * 2004-03-02 2005-09-08 Alexander Von Poncet Adjustable convergence device for a projector and projector equipped with such a convergence device
JP2011227404A (ja) * 2010-04-22 2011-11-10 Sony Corp 光学装置及び投影装置
JP2015215416A (ja) * 2014-05-08 2015-12-03 富士通株式会社 プロジェクタ装置
JP2016118659A (ja) * 2014-12-22 2016-06-30 キヤノン株式会社 画像表示装置
WO2021152827A1 (fr) * 2020-01-31 2021-08-05 シャープＮｅｃディスプレイソリューションズ株式会社 Dispositif d'affichage d'image

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