JP2016045262A - Projection type display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide detection of a lens shift position of a projection type display device with a simple configuration at low cost.SOLUTION: There is provided a projection type display device that includes: a light modulation element that modulates light from a light source; a projection optical system that guides the light modulated by the light modulation element; an external housing; a fixed plate that is fixed to the external housing; and a moving plate that holds the projection optical system to the fixed plate movably within a predetermined range, where the external housing has an opening, and the moving plate has a pointer part that can be visually recognized from the opening within the range.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a lens shift mechanism of a projection display device, and more particularly to position detection during lens shift.

  In order to project an image to a desired position on a projection surface such as a screen, it is necessary to adjust the installation position of the projection display device. At this time, by installing a lens shift mechanism that holds the projection lens so as to be movable, convenience during installation can be improved.

  When the lens shift mechanism is electrically driven by a motor or the like, the shift position and the center position can be detected by a position sensor such as an encoder. On the other hand, when operating manually, a click mechanism may be provided in an operation dial in order for a user to recognize predetermined shift positions, such as a center position.

  Patent Document 1 discloses a mechanism in which a recess is provided in a screw thread portion of a lead screw and a dial clicks and locks when a click ball comes to a position where the recess is engaged. Patent Document 2 discloses a mechanism that provides a click feeling to a user when a notch is provided at a predetermined position of a cam groove and the cam follower is fitted therein.

JP 2007-108460 A Japanese Patent Application Laid-Open No. 2006-079948

  However, with the conventional techniques disclosed in the above-mentioned patent documents, the user can determine where the projection image is located in the entire shift area, only by detecting a predetermined position of the shift range as represented by the center position. Can not do it. For this reason, even if the end of the shift range that has been originally determined is reached, dial operation is performed without noticing it, and an excessive load acts on the shift mechanism, causing image plane tilt and projection image shake due to part deformation. There is a fear. Further, since the click mechanism is provided, the structure becomes complicated, and the number of parts increases and the assemblability deteriorates. Further, in the vicinity of the click, there is a possibility that the operation torque of the dial fluctuates and the feeling of operation is reduced during fine adjustment, and the image shake occurs.

  Therefore, an object of the present invention is to provide lens shift position detection of a projection display device at a low cost with a simple configuration.

In order to achieve the above object, the configuration of the projection display device according to the present invention is as follows.
A light modulation element for modulating light from the light source;
A projection optical system for guiding light modulated by the light modulation element to a projection surface;
An exterior housing,
A fixing plate fixed to the exterior housing;
A moving plate that holds the projection optical system so as to be movable within a predetermined range with respect to the fixed plate;
In a projection display device having
The exterior casing has an opening,
The moving plate has a pointer portion that is visible from the opening within the range.

  According to the present invention, it is possible to provide lens shift position detection of a projection display device at a low cost with a simple configuration.

1 is an external view of a projector according to a first embodiment of the invention. 1 is an overall configuration diagram of a projector according to an embodiment of the present invention. The disassembled perspective view which shows the structure of the shift mechanism regarding 1st Example of this invention. Front view of a shift mechanism according to the first embodiment of the present invention. Schematic diagram showing a lens shift position detection method according to the first embodiment of the present invention. External view of a projector according to the second embodiment of the present invention Front view of a shift mechanism according to a second embodiment of the present invention. Schematic diagram showing a lens shift position detection method according to the second embodiment of the present invention. External view of projector according to third embodiment of the present invention Front view of a shift mechanism according to a third embodiment of the present invention. Configuration diagram of link mechanism according to third embodiment of the present invention Detailed view of the link mechanism according to the third embodiment of the present invention Schematic diagram showing a lens shift position detection method according to the third embodiment of the present invention.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 shows an appearance of a projector (projection display device) according to the present embodiment. In the present invention, a liquid crystal projector using a liquid crystal panel as a light modulation element will be described. However, an image projection apparatus using another light modulation element such as a digital micromirror device (DMD) is also included in the embodiments of the present invention. It is.

  In FIG. 1, reference numeral 100 denotes an exterior housing, and 3 denotes a projection lens. The + Y direction is defined as the upward direction, the −Y direction as the downward direction, the + X direction as the right direction, and the −X direction as the left direction. Reference numerals 72a and 82a denote a vertical shift dial and a horizontal shift dial, respectively. When the user moves the projected image in the vertical direction, the vertical shift dial 72a is operated, and when the user moves in the horizontal direction, 82a is operated. In addition, an opening 101 is formed in a part of the front surface of the exterior casing 100 so that a pointer portion 84 provided on a left and right shift plate 80 described later can be visually recognized.

  FIG. 2 shows a part of the configuration of the projector 100. Light from the light source lamp 1 enters a color separation / synthesis optical system α configured by a dichroic mirror (not shown), a polarization beam splitter PBS, a dichroic prism DP, and the like via a polarization conversion element (not shown).

  The polarization conversion element converts non-polarized light from the light source lamp 1 into polarized light having a specific polarization direction. Further, the color separation / synthesis optical system α separates the incident white light into light of three colors R, G, and B by the dichroic mirror and the polarization beam splitter PBS and guides it to the liquid crystal panel LP. FIG. 2 shows only the liquid crystal panel LP corresponding to one color of the three colors.

  The liquid crystal panel LP forms an original image corresponding to a video signal input from the outside to the projector 100, and modulates incident light by the original image (that is, according to the input video signal). The modulated light modulated by the liquid crystal panel LP is incident on the dichroic prism DP via the polarization beam splitter PBS. Further, modulated light modulated by another liquid crystal panel (not shown) is also guided to the dichroic prism DP.

  The dichroic prism DP combines the incident three colors of modulated light and guides them to the projection lens 3. The projection lens 3 projects the combined three-color modulated light onto a projection surface 4 such as a screen. Thereby, the projection image corresponding to the input video signal is displayed on the projection surface 4.

(Configuration of lens shift mechanism)
Next, the configuration of the lens shift mechanism will be described in more detail with reference to FIGS. 3 and 4. The projection lens barrel 3 is attached to the left / right shift plate 80. The left / right shift plate 80 is held movably with respect to the up / down shift plate 70, and the up / down shift plate 70 is held movably with respect to the shift base 60.

  Projection lens openings 61, 71, 81 through which the projection lens barrel 3 is inserted are provided in the shift base 60, the up / down shift plate 70, and the left / right shift plate 80, respectively. Guide pin portions 60c and 70c projecting toward the left and right shift plate 80 in the optical axis direction are provided at four positions on the shift base 60 and the upper and lower shift plates 70, respectively. On the other hand, elongated holes 70a extending in the vertical direction are formed at four positions on the vertical shift plate 70 in the vertical and horizontal directions, and elongated holes 80a extending in the horizontal direction are formed at the vertical and horizontal four positions on the horizontal shift plate 80. Is formed.

  After the washers 91 are mounted on the four guide pin portions 70c of the shift base 60, the upper and lower shift plates 70 are shifted to the shift base so that the respective guide pin portions 60c are inserted into the respective long hole portions 70a of the upper and lower shift plates 70. 60 is assembled. A bush 92a, a coil spring 93, and a bush 92b are attached in this order on each guide pin portion 60c protruding from each elongated hole portion 70a. A screw 94 is tightened at the tip of each guide pin portion 60c, and the head of the screw 94 prevents the bush 92b from coming off from the guide pin portion 60c.

  In this state, the coil spring 93 is compressed (charged) between the two bushes 92 a and 92 b, that is, between the head of the screw 94 and the shift plate 70, and the vertical shift plate 70 is moved via the washer 91 to the shift base 60. Press against. Similarly, after the washers 95 are mounted on the four guide pin portions 70c of the vertical shift plate 70, the left and right shift plates are inserted so that the guide pin portions 70c are inserted into the long hole portions 80a of the left and right shift plates 80, respectively. 80 is assembled to the vertical shift plate 70. A bush 96a, a coil spring 97, and a bush 96b are attached in this order on each guide pin portion 70c protruding from each elongated hole portion 80a.

  A screw 98 is tightened at the tip of each guide pin portion 70c, and the head of the screw 98 prevents the bush 96b from coming off from the guide pin portion 70c. In this state, the coil spring 97 is compressed (charged) between the two bushes 96a and 96b, that is, between the head of the screw 98 and the shift plate 80, and the shift plate 80 is connected to the shift base 70 via the washer 95. Press against it.

  Reference numeral 72 denotes a drive mechanism for the up / down shift plate 70. An up / down shift dial 72a that can be operated from the exterior casing 100 is connected to a gear unit 72b, and transmits a rotation operation of the up / down shift dial 72a to the up / down lead screw 72c. The upper and lower lead screws 72c are held by a holding member 72d, and a nut 72e is screwed together. The nut 72e is held by a nut holding portion 73 formed on the vertical shift plate 70.

  When the user operates the up / down shift dial 72a, the up / down lead screw 72c rotates, and the nut 72e moves in the up / down direction with respect to the shift base 60 together with the up / down shift plate 70. Thereby, the projection lens barrel 3 is shifted in the vertical direction.

  Similarly, reference numeral 82 denotes a drive mechanism for the left / right shift plate 80. The left / right shift dial 82a that can be operated from the outer casing 100 is connected to the gear unit 82b, and transmits the rotation operation of the left / right shift dial 82a to the left / right lead screw 82c. The left and right lead screws 82c are held by a holding member 82d, and a nut 82e is screwed together. The nut 82 e is held by a nut holding portion 83 formed on the left and right shift plate 80.

  When the user operates the left / right shift dial 82a, the left / right lead screws 82c rotate, and the nut 82e moves in the left / right direction with respect to the up / down shift plate 70 and the shift base 60 together with the left / right shift plate 80. Thereby, the projection lens barrel 3 is shifted in the left-right direction. Further, a pointer portion 84 that is visible from an exterior opening 101 described later is formed on the side of the left and right shift plate 80.

  Next, shift position detection according to the first embodiment of the present invention will be described with reference to FIGS. FIG. 5 shows the positional relationship between the exterior opening 101 provided in the exterior housing 100 and the pointer portion 84 at each shift position of the projection lens 3. Here, the shape of the exterior opening represents a lens shift range in which the projected image is not chipped and the optical performance can be satisfied. A dotted line portion 102 indicates a range in which the lens shift mechanism 5 can actually move. That is, it shows the range in which the up-and-down shift plate 70 and the left-right shift plate 80 that are restricted by the elongated holes 70a and 80a in FIG. 3 can move.

  Here, the exterior opening 101 is provided on the inner side of the dotted line portion 102, and has a hexagonal shape in which the upper corner is notched. Therefore, when the maximum amount is moved in the up and down and left and right directions, the movement in the direction orthogonal thereto, that is, in the left and right and up and down directions is restricted.

  FIG. 5A shows an initial state in which the lens shift is not performed in any of the vertical and horizontal directions, and the center of the optical axis of the projection lens 3 and the center of the projection image are substantially coincident. FIGS. 5A to 5J show the positional relationship between the exterior opening 101 and the pointer portion 84 when the user performs a lens shift operation in an arbitrary direction from the initial state FIG. When the user operates the left / right shift dial to move the projected image to the left, the pointer portion 84 also moves to the left with respect to the exterior opening 101, and the position in FIG. This is the shift amount.

  Similarly, when the user moves the projected image in the right direction, the pointer portion 84 also moves in the right direction with respect to the exterior opening 101, and the position in the state of FIG. 5G is the maximum right shift amount. . Next, when the user operates the up / down shift dial to move the projection image downward, the pointer portion 84 also moves downward with respect to the exterior opening 101, and the position in FIG. This is the maximum shift amount in the direction. Similarly, when the user moves the projected image upward, the pointer portion 84 also moves upward with respect to the exterior opening 101, and the position in the state of FIG. 5B becomes the maximum upward shift amount. .

  On the other hand, a case will be described in which the shift movement is performed in a direction orthogonal to the maximum amount of shift in the vertical and horizontal directions. At the position shown in FIG. 5 (f), that is, the position shifted by the maximum amount in the left direction, it is possible to move downward to the state shown in FIG. 5 (h), and upward in FIG. 5 (d). It is possible to move to the state of). 5 (g), that is, a position shifted by the maximum amount in the right direction, it is possible to move downward to the state of FIG. 5 (j), and upward in FIG. Movement to the state of (e) is possible. Furthermore, at the position in the state of FIG. 5B, that is, the position shifted by the maximum amount in the upward direction, the movement to the left is possible up to the state of FIG. 5A, and to the right is FIG. Movement to the state of (c) is possible.

  As described above, the user can intuitively recognize the shift range of the projection image as a coordinate from the relationship between the exterior opening 101 and the pointer portion 84, and can operate within the predetermined shift range. In addition, by providing the exterior opening 101 inside the structural shift end, the shift operation can be terminated before reaching the mechanical end, so that an excessive load is applied to the part, causing the part to deform or It is possible to suppress the occurrence of image deterioration and projection image shake due to the image. Furthermore, according to the above configuration, it is not necessary to provide a click mechanism for recognizing the shift position, the number of parts is greatly reduced, and assemblability does not deteriorate.

  In the present embodiment, the shape of the exterior opening 101 is a hexagonal shape, but can be set according to a desired shift range, for example, any shape such as a rhombus shape, a circular shape, an octagonal shape can be used. It becomes.

  With reference to FIGS. 6, 7 and 8, lens shift position detection according to the second embodiment of the present invention will be described. A first exterior opening 102 is formed on a part of the upper surface of the exterior casing 100 so that the first pointer portion 85 provided on the left and right shift plate 80 can be visually recognized. In addition, a second exterior opening 104 is formed on a part of the front surface of the exterior casing 100 so that the second pointer portion 75 provided on the vertical shift plate 70 can be visually recognized. In addition, a first indicator portion 103 indicating a lateral movement range is formed in the vicinity of the first exterior opening portion 102. The first indicator portion 103 further includes a left and right maximum amount indicator portion 1031 and a left and right minimum amount. It consists of an indicator part 1032.

  Similarly, a second indicator portion 105 indicating a vertical movement range is formed in the vicinity of the second exterior opening 104, and the second indicator portion 105 further includes an upper and lower maximum amount indicator portion 1051 and upper and lower portions. It consists of a minimum amount indicator portion 1052. Further, 1031, 1032, 1051, and 1052 are formed to have different colors or patterns with respect to the exterior 100. Furthermore, 1031 and 1052, 1032 and 1051 are set to have the same color or pattern in this combination.

  FIG. 8 shows the positional relationship between the first exterior opening 102 and the first pointer 85 provided in the exterior housing 100 at each shift position of the projection lens 3, and the second exterior opening 104 and the first position. The positional relationship between the second pointer portions 75 is shown.

  FIG. 8A shows an initial state in which the lens shift is not performed in any of the vertical and horizontal directions, and the center of the optical axis of the projection lens 3 and the center of the projection image are substantially coincident. FIGS. 8A to 8J show the positional relationship between the first indicator portion 103 and the first pointer portion 85 when the user performs a lens shift operation in an arbitrary direction from the initial state (A) and the second state. The positional relationship between the indicator portion 105 and the second pointer portion 75 is shown.

  When the first pointer portion 85 points to the left and right maximum amount indicator portion 1031, the movement in the vertical direction can be performed within the region where the second pointer portion 75 points to the upper and lower minimum amount indicator portion 1052. Further, when the first pointer portion 85 points to the left and right minimum amount indicator portion 1032, the movement in the vertical direction is a region where the second pointer portion 75 points to the upper and lower maximum amount indicator portion 1051 and the upper and lower minimum amount indicator portion 1052. Can be moved within.

  Similarly, when the second pointer portion 75 points to the maximum vertical amount indicator portion 1051, the movement in the left-right direction can be moved within the region where the first pointer portion 85 points to the left-right minimum amount indicator portion 1032. Become. Further, when the second pointer portion 75 points to the minimum amount indicator portion 1052 in the vertical direction, the movement in the left-right direction is a region in which the first pointer portion 85 points to the left and right maximum amount indicator portion 1031 and the left and right minimum amount indicator portion 1032. Can be moved within.

  When the user operates the left / right shift dial to move the projected image to the left, the first pointer portion 85 also moves to the left with respect to the first exterior opening 102, and the state shown in FIG. This is the maximum left shift amount. Similarly, when the user moves the projected image in the right direction, the first pointer portion 85 also moves in the right direction with respect to the first exterior opening 102, and the position in FIG. This is the maximum shift amount in the direction.

  Next, when the user operates the up / down shift dial to move the projected image downward, the second pointer portion 75 also moves downward with respect to the second exterior opening 104, as shown in FIG. The position in the state becomes the maximum downward shift amount. Similarly, when the user moves the projection image upward, the second pointer portion 75 also moves upward with respect to the second exterior opening 104, and the position shown in FIG. This is the maximum shift amount in the direction.

  On the other hand, a case will be described in which the shift movement is performed in a direction orthogonal to the maximum amount of shift in the vertical and horizontal directions. In the position shown in FIG. 8 (f), that is, the position shifted by the maximum amount in the left direction, the vertical movement range is limited by the vertical minimum amount indicator portion 1052. ) To the state of FIG. 8 (d) in the upward direction.

  Similarly, at the position in the state shown in FIG. 8G, that is, the position shifted by the maximum amount in the right direction, the vertical movement range is limited by the vertical minimum amount indicator unit 1052, so It is possible to move to the state of FIG. 8 (j), and it is possible to move upward to the state of FIG. 8 (e).

  Further, at the position in the state of FIG. 8B, that is, the position shifted by the maximum amount in the upward direction, the movement in the left-right direction is restricted by the left-right minimum amount indicator portion 1032; It can move to the state of (a), and can move to the state of FIG. 8 (c) in the right direction.

  As described above, the user can recognize the shift range of the projected image from the relationship between the first indicator portion 103 and the second indicator portion 105, the first indicator portion 85 and the second indicator portion 75, and the predetermined range. The operation within the shift range is possible. In addition, by providing the exterior opening 101 inside the structural shift end, the shift operation can be terminated before reaching the mechanical end, so that an excessive load is applied to the part, causing the part to deform or It is possible to suppress the occurrence of image deterioration and projection image shake due to the image. Furthermore, according to the above configuration, it is not necessary to provide a click mechanism for recognizing the shift position, the number of parts is greatly reduced, and assemblability does not deteriorate.

  In the present embodiment, the first index part 103 and the second index part 105 are divided into two pattern areas, but a plurality of areas may be provided depending on a desired shift range.

  The lens shift position detection according to the third embodiment of the present invention will be described with reference to FIGS. In the second embodiment, the configuration in which the second exterior opening 104 is provided on the front surface of the exterior casing 100 has been described. In the third embodiment, the second exterior opening 108 is provided on the upper surface of the exterior housing 100 as shown in FIG. In this case, as shown in FIG. 10, the vertical shift plate 70 is connected to the link mechanism 110, and the operation in the Y direction of the vertical shift plate 70 is converted into the operation in the Z direction. Is provided.

  First, the link mechanism 110 will be described with reference to FIG. As shown in FIG. 11, the link mechanism 110 includes a Y-direction axis 1112, a Z-direction axis 1113, a link member 1114, a connection member 1115, a fixing member 1116, and pins 1117 to 1120.

  A Y-direction axis 1112 and a Z-direction axis 1113 are attached to the link member 1114 so as to be rotatable about pins 1117 and 1118, respectively. The link member 1114 is rotatably attached to the connection member 1115 around the pin 1119. Further, the connecting member 1115 is rotatably attached to the fixing member 1116 around the pin 1120, and the fixing member is attached to a part of the fixing plate 60. The Y-direction shaft 1112 is connected to a transmission portion 74 provided on the side of the vertical shift plate 70, and the Z-direction shaft 1113 is inserted into a bearing (not shown) provided on the fixed plate 60. It is held movably in the direction.

  Next, the operation of the link mechanism 110 will be described. As the shift plate 70 moves in the vertical direction, the Y-direction axis 1112 also moves up and down. The vertical movement of the Y-direction axis 1112 is transmitted to the Z-direction axis 1113 via the link member 1114 and converted into movement in the Z direction.

  FIG. 12 shows the operation of the link mechanism 110 when the user operates the up / down shift dial 71a from the initial state (A). If the projected image is moved upward, the Z-direction axis 1113 moves in the −Z direction as the Y-direction axis 1112 moves as shown in FIG. At this time, since the second pointer portion 1111 provided at the tip of the Z-direction shaft 1113 also moves in the −Z direction at the same time, the central axis of the second pointer portion 1111 in the initial state (A) is from the position (A). Move to position (U).

  Similarly, when the projected image is moved downward, the Z-direction axis 1113 moves in the + Z direction as the Y-direction axis 1112 moves as shown in FIG. At this time, since the second pointer portion 1111 provided at the tip of the Z-direction shaft 1113 also moves in the + Z direction at the same time, the central axis of the second pointer portion 1111 in the initial state (A) is from the position (A) ( Move to position L).

  A first exterior opening 106 is formed on a part of the upper surface of the exterior casing 100 so that the first pointer portion 86 provided on the left and right shift plate 80 can be visually recognized. In addition, a second exterior opening 108 is formed on a part of the upper surface of the exterior casing 100 so that the second pointer portion 1111 provided at the tip of the Z-direction shaft 1113 of the link mechanism 110 can be visually recognized. Yes. In addition, a first indicator portion 107 indicating a lateral movement range is formed in the vicinity of the first exterior opening 106, and the first indicator portion 107 further includes a left and right maximum amount indicator portion 1071 and a left and right minimum amount. It consists of an indicator part 1072.

  Similarly, in the vicinity of the second exterior opening portion 108, a second indicator portion 109 indicating a vertical movement range is formed, and the second indicator portion 109 further includes an upper and lower maximum amount indicator portion 1091 and an upper and lower portion. It consists of a minimum amount indicator portion 1092. Further, 1071, 1072, 1091 and 1092 are formed to have different colors or patterns with respect to the exterior 100. Furthermore, 1071 and 1092 and 1072 and 1091 are set to have the same color or pattern in this combination.

  FIG. 13 shows the positional relationship between the first exterior opening 106 and the first pointer 86 provided in the exterior housing 100 at each shift position of the projection lens 3, and the second exterior opening 108 and the first position. The positional relationship between the two pointer parts 1111 is shown.

  FIG. 13A shows an initial state in which the lens shift is not performed in any of the vertical and horizontal directions, and the center of the optical axis of the projection lens 3 and the center of the projection image are substantially coincident. FIGS. 8A to 8J show the positional relationship between the first indicator portion 107 and the first pointer portion 86 when the user performs a lens shift operation in an arbitrary direction from the initial state (A) and the second state. The positional relationship between the indicator portion 109 and the second pointer portion 1111 is shown.

  When the first pointer portion 86 points to the left and right maximum amount indicator portion 1071, the movement in the vertical direction can be performed within the region where the second pointer portion 1111 points to the upper and lower minimum amount indicator portion 1092. When the first pointer portion 86 points to the left and right minimum amount indicator portion 1072, the movement in the vertical direction is a region where the second pointer portion 1111 points to the up and down maximum amount indicator portion 1091 and the up and down minimum amount indicator portion 1092. Can be moved within.

  Similarly, when the second pointer part 1111 points to the up and down maximum amount index part 1091, the movement in the left and right direction is possible within the region where the first pointer part 86 points to the left and right minimum amount index part 1072. Become. In addition, when the second pointer portion 1111 points to the minimum amount indicator portion 1092 in the vertical direction, the movement in the left-right direction is a region where the first pointer portion 86 points to the left and right maximum amount indicator portion 1071 and the left and right minimum amount indicator portion 1072. Can be moved within.

  When the user operates the left / right shift dial to move the projected image to the left, the pointer 86 also moves to the left with respect to the first exterior opening 106, and the position shown in FIG. Maximum shift amount in the left direction. Similarly, when the user moves the projected image in the right direction, the first pointer portion 86 also moves in the right direction with respect to the first exterior opening portion 106, and the position in the state of FIG. This is the maximum shift amount in the direction.

  Next, when the user operates the up / down shift dial to move the projection image downward, the second pointer portion 1111 moves in the + Z direction with respect to the second exterior opening portion 108, and FIG. The position in the state becomes the maximum downward shift amount. Similarly, when the user moves the projection image upward, the second pointer portion 1111 moves in the −Z direction with respect to the second exterior opening portion 108, and the position in the state of FIG. This is the maximum upward shift amount.

  On the other hand, a case will be described in which the shift movement is performed in a direction orthogonal to the maximum amount of shift in the vertical and horizontal directions.

  In the position shown in FIG. 13 (f), that is, the position shifted by the maximum amount in the left direction, the vertical movement range is limited by the vertical minimum amount indicator portion 1092. ) To the state of FIG. 13 (d) in the upward direction.

  Similarly, at the position in the state of FIG. 13G, that is, the position shifted by the maximum amount in the right direction, the vertical movement range is limited by the vertical minimum amount indicator portion 1092. It is possible to move to the state of FIG. 13 (j), and upward is possible to move to the state of FIG. 13 (e).

  Further, at the position in the state of FIG. 13B, that is, the position shifted by the maximum amount in the upward direction, the movement in the left-right direction is limited by the left-right minimum amount indicator portion 1032; It can move to the state of (a), and can move to the state of FIG. 13 (c) in the right direction.

  By making it possible to recognize the up / down and left / right shift ranges from the upper surface of the exterior housing as in this embodiment, the user performs a shift operation without blocking the projection light compared to the case where an opening is provided on the front surface of the exterior housing. It becomes possible. Moreover, there is no possibility that the user is dazzled by looking into the projection light, and the operability can be further improved.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and change are possible within the range of the summary.

100 exterior housing, 101 exterior opening, 84 pointer section, 85, 86 first pointer section,
75, 1111 second pointer portion, 102, 106 first exterior opening,
104, 108 second exterior opening, 103, 107 first indicator,
1031, 1071 left and right maximum amount indicator portion, 1032, 1072 left and right minimum amount indicator portion,
105,109 second indicator portion, 1051,1091 up and down maximum amount indicator portion,
1052, 1092 Vertical and minimum amount indicator part

Claims (5)

A light modulation element for modulating light from the light source;
A projection optical system for guiding light modulated by the light modulation element to a projection surface;
An exterior housing,
A fixing plate fixed to the exterior housing;
A moving plate that holds the projection optical system so as to be movable within a predetermined range with respect to the fixed plate;
In a projection display device having
The exterior casing has an opening,
The projection type display device, wherein the moving plate has a pointer portion that is visible from the opening within the range. The moving plate holds a projection lens, moves in a first moving range in a first direction within a plane perpendicular to the optical axis, and the first moving plate together with the first moving plate. And a second moving plate that moves in a second moving range in a second direction orthogonal to the direction, wherein the opening indicates the first moving range and the second moving range. The projection display device according to claim 1. 3. The projection according to claim 1, wherein the opening has a polygonal shape provided on the front surface of the exterior housing, and the pointer is provided on the first moving plate. 4. Type display device. The opening includes a first opening indicating the first movement range provided on the upper surface of the exterior casing, and a second indicating the second movement range provided on the front surface of the exterior casing. The first moving plate is provided with a first pointer portion visible from the first opening, and the second moving plate has the second opening. The projection type display device according to claim 1, wherein a second pointer portion visible from the portion is provided. The opening includes a first opening indicating the first movement range provided on an upper surface of the exterior casing, and a second opening indicating the second movement range. The first moving plate is provided with a first pointer portion that is visible from the first opening, the second moving plate is connected to a link mechanism, and the second opening is connected to the distal end of the link mechanism. The projection type display device according to claim 1, wherein a second pointer portion visible from the portion is provided.