JP2004012973A - Projection display device - Google Patents

Abstract

An object of a projection display device is to easily perform focus adjustment without being limited to an installation mode.
A light source section, a liquid crystal panel (modulating means) for modulating light from the light source section, a projection lens for projecting light modulated by the liquid crystal panel, and an outer casing for covering these. A projection display device 1 for projecting light projected by the projection lens from the front surface of an outer casing, wherein the projection lens has a focus ring (focus adjustment unit) 32 and a zoom ring (zoom adjustment unit) 33. A focusing operation member 40f and a zooming operation member 40z having operation portions 43f and 43z exposed are provided on a left side panel 5 continuous with the front panel 3 of the outer casing, and the focus ring and the zoom ring are operated by operating these operation members. Is performed.
[Selection diagram] FIG.

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a projection display device. More specifically, the present invention relates to a technology that enables a focusing operation to be easily performed regardless of the orientation of a projection display device depending on an installation location or the like.
[0002]
[Prior art]
BACKGROUND ART Conventionally, there are a light source unit, a modulation unit that modulates light emitted from the light source unit, and a projection type display device that displays an image on a screen or the like by projecting light modulated by the modulation unit by a projection lens. In such a projection display device, it is necessary to perform focusing (focus adjustment) of the projection lens.
[0003]
The focus adjustment is performed, for example, by rotating a focus ring rotatably provided on a lens barrel constituting the projection lens.
[0004]
The lens barrel of the projection lens is disposed in the outer casing of the projection display device, and its front end projects from an opening formed in the front panel of the outer casing, or is disposed so as to face the opening of the front panel. Is common.
[0005]
In a projection display device in which the front end of the lens barrel projects from the front panel, focusing can be easily performed by providing the focus ring at the front end of the projected lens barrel.
[0006]
By the way, in recent years, there has been a tendency to arrange the entire lens barrel inside the front panel from the viewpoint of a demand for miniaturization of the apparatus or from the viewpoint of design.
[0007]
As described above, when the entire lens barrel is disposed in the outer case, there is a case in which the operation unit of the focus ring can be operated through an operation window formed on a top plate of the outer case.
[0008]
FIG. 14 schematically shows an example of such a conventional projection display device a.
[0009]
A lens barrel c is arranged in an outer casing b forming an outer shell of the projection display device a.
[0010]
An opening f for exposing a front lens e of the lens barrel c to the outside is formed in a front panel d of the outer casing b, and the front lens e is arranged close to the opening f.
[0011]
A focus ring g is provided at the front end of the lens barrel c, and an operating element f protruding upward is integrally formed with the focus ring g.
[0012]
An operation window j is formed in a top plate i of the outer casing b, and the operation element f projects upward through the operation window j.
[0013]
Therefore, in the projection type display device a, the focus ring g can be operated by operating the operation element f projecting upward from the operation window j.
[0014]
[Problems to be solved by the invention]
The projection display device a is placed on the floor 80 and projected on the front wall 81 (see FIG. 10). The projection display device a is suspended upside down on the ceiling 82 and projected on the front wall 81. In addition to the form (see FIG. 11), a form in which the apparatus is placed upside down on an object having a predetermined height such as a closet 83 and projected onto the front wall 81 (see FIG. 12), or a storage space with a narrow vertical space There is a mode in which the light is projected on the front wall 81 while being stored in a rack 85 having a space 84 (see FIG. 13).
[0015]
FIGS. 10 to 13 are drawings for explaining an installation mode of the projection type display device of the present invention. In each of the installation modes shown in FIGS. Problems when using the display device a will be described below.
[0016]
In the case where the projection type display device a is used by placing it on the floor 80 (see FIG. 10) and the case where it is used by hanging it upside down on the ceiling 82 (see FIG. 11), the outer casing b is used. Since the operator f protruding from the top plate i is located on the side where the operator can operate, the focus can be adjusted. However, the operator can be turned upside down on an object having a predetermined height such as a closet 83. In the case of using the device by placing it (see FIG. 12) or using it while being stored in a rack 85 having a storage space 84 with a narrow vertical space (see FIG. 13), the operator f of the focus ring g is used. Can not operate.
[0017]
Therefore, in the above-mentioned conventional projection display device a, there is a problem that the installation form is limited.
[0018]
An object of the present invention is to make it possible to easily perform focus adjustment in a projection display device without being limited to an installation mode.
[0019]
[Means for Solving the Problems]
Therefore, the projection display device of the present invention, in order to solve the above-described problems, a light source unit, a modulation unit that modulates the light of the light source unit, and a projection lens that projects the light modulated by the modulation unit, An outer casing that covers these, a projection display device that projects light projected by the projection lens from the front of the outer casing, wherein the projection lens has a focus adjustment unit, and is provided on the front of the outer casing. An operation member having an operation unit exposed on a continuous right or left side surface is provided, and the operation of the focus adjustment unit is performed by operating the operation member.
[0020]
Therefore, in the projection display device of the present invention, since the operation unit of the focus adjustment unit is provided on the right side or the left side continuous to the front of the outer casing, the focus adjustment is performed on the right side or the left side of the outer casing. .
[0021]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the projection type display device of the present invention will be described with reference to the accompanying drawings.
[0022]
1 to 8 show an embodiment of the projection display device of the present invention.
[0023]
The projection type display device 1 is configured by disposing required components and members in an outer casing 2 having a flat box shape in a vertical direction, and a front panel 3 which is a front portion of the outer casing 2 has a front panel 3 in front of a later-described projection lens. An opening 4 for exposing the ball lens to the outside is formed (see FIG. 1).
[0024]
Further, an operation unit for performing focusing and zooming of the projection display device 1 is disposed on the left side panel 5 of the outer casing 2 as described later (see FIG. 1).
[0025]
First, the overall outline of the projection display device of the present invention will be described with reference to FIG.
[0026]
A light source unit 11 is arranged at one corner of the outer casing 2 and has a light source 12 and a reflector 13 (see FIG. 2).
[0027]
The reflection surface of the reflector 13 is formed as a spheroid, and the light emitting unit of the light source 12 is located at the first focal position of the reflection surface (see FIG. 2).
[0028]
A concave lens 14 is disposed in front of the reflector 13 so that the focal point of the concave lens 14 is located at the second focal point on the reflection surface. As a result, the light emitted from the light source 12 and reflected on the reflection surface of the reflector 13 is emitted by the concave lens 14 as a light beam parallel to the optical axis. The reflector 13 is formed by forming a reflective film on the inner surface of a base made of hard glass by an appropriate means such as aluminum evaporation. Further, a discharge lamp is used as the light source 12.
[0029]
The light emitted from the concave lens 14 is separated into three color components of R (red), G (green), and B (blue) by two dichroic mirrors 15R and 15G, and a liquid crystal panel 16R as a modulating means. The modulated color components of the respective colors are modulated by 16G and 16B, and the modulated color components of the respective colors are combined by a cross prism 17 to be projected by a projection lens 18 from the opening 4 provided on the front panel 3 of the outer casing 2 to a screen (not shown) in front. The image is projected, thereby displaying an image on the screen.
[0030]
That is, the light emitted from the concave lens 14 is first reflected by the dichroic mirror 15R in the red component R, and the reflected red component is totally reflected by the total reflection mirror 19 and is incident on the liquid crystal panel 16R. After being modulated by the video signal related to the applied red component, the light is incident on the cross prism 17 (see FIG. 2).
[0031]
The green component G of the light transmitted through the dichroic mirror 15R is reflected by the dichroic mirror 15G, input to the liquid crystal panel 16G, and is modulated by a video signal related to the green component applied to the liquid crystal panel 16G. (See FIG. 2).
[0032]
Further, the blue component B transmitted through the dichroic mirror 15G is totally reflected by the total reflection mirrors 20 and 21 sequentially, is input to the liquid crystal panel 16B, and is modulated by a video signal related to the blue component applied to the liquid crystal panel 16B. The light enters the cross prism 17 (see FIG. 2). The color components R, G, and B input to the cross prism 17 are combined by the cross prism 17 and then emitted from the front of the cross prism 17 and projected forward by the projection lens 18 (see FIG. 2). .
[0033]
The path from the light source 12 to the projection lens 18 includes means for making the luminance of light emitted from a discharge lamp having an intensity distribution uniform over the entire screen of the liquid crystal panels 16R, 16G, and 16B. Although optical elements having various purposes, such as relay lenses, are arranged, they are a matter of design and are not the subject of the present invention, and therefore only the main components are shown in FIG.
[0034]
In this embodiment, a description has been given of a case where a discharge lamp is used as the light source 12. However, the present invention is not limited to this, and various types of lamps, for example, various incandescent lamps, xenon lamps, halogen A lamp or the like can be used.
[0035]
Further, in this embodiment, the case where a liquid crystal panel is used as the modulating means has been described. However, the present invention is not limited to this, and various types of light valves, such as GLV (Grating), are used. Light Valve), DMD (Digital Micromirror Device) and the like can be used.
[0036]
The projection lens 18 is configured by disposing a required lens (not shown) in a lens barrel 30, and a front lens 31 is disposed on the foremost side thereof.
[0037]
A focus ring 32 and a zoom ring 33 disposed behind the focus ring 32 are rotatably provided on the outer peripheral surface of the front part of the lens barrel 30 (see FIG. 3).
[0038]
The focus ring 32 is used to perform focusing by moving a required lens or lens group of the projection lens 18 for focusing by rotating the focus ring 32 (see FIG. 3).
[0039]
The zoom ring 33 is for rotating the required lens or lens group of the projection lens 18 for zooming by rotating the zoom ring 33 (see FIG. 3).
[0040]
A plurality of teeth 34, 34,... Are formed in the focus ring 32 in the circumferential direction over a range of approximately 90 ° with respect to the center in the vertical direction in the left half as viewed from the front shape of the outer peripheral surface. (See FIG. 3).
[0041]
The zoom ring 33 is formed in substantially the same shape as the focus ring 32, and extends in the circumferential direction over a range of approximately 90 ° across the center in the vertical direction in the left half as viewed from the front of the outer peripheral surface. A plurality of teeth 35, 35,... Are formed (see FIG. 3).
[0042]
Different operation members 40f and 40z for operating the focus ring 32 and the zoom ring 33 are arranged between the front part of the lens barrel 30 and the left side panel 5 of the outer casing (FIG. 3). reference).
[0043]
The operation member 40f for operating the focus ring 32 is referred to as a focusing operation member, and the operation member 40z for operating the zoom ring 33 is referred to as a zooming operation member.
[0044]
Since the focusing operation member 40f and the zooming operation member 40z are formed in substantially the same shape, the focusing operation member 40f will be mainly described. The reference numerals of the operating member for focusing and the parts related thereto are given with a suffix "f" after the numeral, and the reference numerals of the operating member for zooming and parts related thereto are used for the operating member for focusing and parts related thereto. "Z" is added as a suffix after the number excluding "f" in the reference numerals. Thus, description of the zooming operation member 40z is omitted.
[0045]
The focusing operation member 40f is a substantially annular member, and the diameter of the left half 41f is larger than the diameter of the right half 42f when viewed from the front (see FIG. 4).
[0046]
The outer peripheral surface of the left half 41f of the focusing operation member 40f is subjected to knurling to form an operating portion 43f, and the outer peripheral surface of the right half 42f has teeth 34, 34,... Of the focus ring 32. Are formed (see FIGS. 4 and 7).
[0047]
The focusing operation member 40f is rotatably supported by a support base 50 provided between the front portion of the lens barrel 30 and the left side panel 5 of the outer casing 2, and has a tooth portion of the right half 42f. Are engaged with the teeth 34, 34,... Of the focus ring 32 (see FIGS. 4 and 7).
[0048]
A circular supported hole 45f is formed in the center of the focusing operation member 40f. The supported hole 45f is formed with a radius that is approximately half the radius of the right half 42f, whereby the entire focusing operation member 40f is a substantially annular member.
[0049]
The support base 50 includes a base portion 51 attached to a chassis (not shown) and a plate-shaped support portion 52 integrally protruding upward from the upper surface of the base portion 51 (see FIGS. 5 and 6).
[0050]
The support portion 52 is disposed so that its surface direction is parallel to the front panel 3, and has an opening 53. Of the opening edges of the opening 53, the left and right portions of the support edge protrude forward. Pieces 54l and 54r are formed, and support pieces 54u and 54d projecting rearward are formed at upper and lower portions of the opening edge of the opening 53, respectively (see FIGS. 5 and 6).
[0051]
The support pieces 54, 54,... Are formed in an arc shape having substantially the same curvature as that of the opening 53 when viewed from the front, and the locking claws 55, 55, which protrude outward at their respective tips. Are formed respectively (see FIGS. 5 and 6).
[0052]
Among the support pieces 54, 54,..., The curvature of a circle formed by extending the outer surfaces of the opposing ones in the circumferential direction is the supported hole 45f of the focusing operation member 40f and the zooming operation member 40z. It is formed almost the same as 45z (see FIG. 7).
[0053]
By fitting the two support pieces 54l, 54r projecting forward into the supported holes 45f of the focusing operation member 40f, the focusing operation member 40f is rotatably supported by the two support pieces 54l, 54r. You. At this time, the focusing operation member 40f can be fitted to the support pieces 54l, 54r by slightly bending the two support pieces 54l, 54r in a direction in which the locking claws 55, 55 approach each other (FIG. 7).
[0054]
After the fitting of the focusing operation member 40f to the support pieces 54l, 54r is completed, the locking claws 55, 55 are removed from the focusing operation member 40f by removing the force that has bent the support pieces 54l, 54r. The focusing operation member 40f is locked to the opening edge of the supported hole 45f to prevent the focusing operation member 40f from slipping forward (see FIG. 7).
[0055]
Further, by fitting the two support pieces 54u and 54d projecting rearward into the supported holes 45z of the zooming operation member 40z, the zooming operation member 40z is rotatably supported by the two support pieces 54u and 54d. You. At this time, the zooming operation member 40z can be fitted to the support pieces 54u, 54d by slightly bending the two support pieces 54u, 54d in a direction in which the locking claws 55, 55 approach each other (FIG. 7).
[0056]
After the fitting of the zooming operation member 40z to the support pieces 54u, 54d is completed, the locking claws 55, 55 are removed by removing the force that has bent the support pieces 54u, 54d. The zooming operation member 40z is prevented from falling backward (see FIG. 7) by being locked to the periphery of the supported hole 45z.
[0057]
Thus, the two opposing support pieces 54l and 54r and 54u and 54d function as a support shaft that rotatably supports the focusing operation member 40f and the zooming operation member 40z.
[0058]
Since the supported holes 45f and 45z of the focusing operation member 40f and the zooming operation member 40z are formed as large as possible, the outer diameters of the support pieces 54l and 54r and 54u and 54d functioning as support shafts for supporting them. Can be increased, and the rotation of the focusing operation member 40f and the zooming operation member 40z can be stabilized.
[0059]
In other words, increasing the size of the support shaft means reducing the axial blur at the outer peripheral edge of the members (in this example, the focusing operation member 40f and the zooming operation member 40z) that are rotatably supported by the support shaft. Because you can.
[0060]
In addition, the present invention is not limited to the one in which the diameter of the rotating shaft is increased as described above, and the diameter of the rotating shaft can be reduced. In this case, the operating members 40f and 40z are disc-shaped members. What is necessary is just to form.
[0061]
The operating member 40f for focusing and the operating member 40z for zooming fitted to the support pieces 54, 54,... Are respectively provided with locking claws 55 provided at the tips of the support pieces 54, 54,. With 55, positioning in the front-back direction is performed in a state where there is substantially no play, and the positioning is prevented. Also, by forming the outer diameters of the support pieces 54l and 54r and 54u and 54d slightly larger than the inner diameters of the supported holes 45f and 45z, the support pieces 54, 54,. The inner peripheral surfaces of 45f and 45z can be elastically contacted, and the rattling of the focusing operation member 40f and the zooming operation member 40z can be eliminated.
[0062]
Each of the focusing operation member 40f or the zooming operation member 40z rotatably supported by the support pieces 541, 54r or 54u, 54d has teeth 44f, 44f,... Formed on the right half 42f or 42z thereof. , 44z, 44z,... Are engaged with teeth 34, 34,... Or 35, 35,... Formed on the focus ring 32 or the zoom ring 33, respectively (see FIG. 7).
[0063]
A part of the outer peripheral surface of the left portion 41f or 41z of each focusing operation member 40f or zooming operation member 40z is exposed to the outside from a vertically long rectangular operation window 6 formed on the left side panel 5 (FIG. 1, FIG. 3, FIG. 4).
[0064]
The width of the operation window 6 is set to a size that allows the two operation members (the focusing operation member 40f and the zooming operation member 40z) to be exposed (see FIG. 3). The operation window 6 may be provided separately so as to correspond to each of the operation members 40f and 40z.
[0065]
The focusing operation member 40f and the zooming operation member 40z are exposed from the operation window 6 such that the left ends of the left halves 41f and 41z are located substantially in the same plane as the outer surface of the left side panel 5. (See FIG. 3).
[0066]
The operation window 6 formed in the left side panel 5 is formed in a tapered shape so that each of its peripheral edges 6a, 6a,... Becomes wider toward the outside, whereby the focusing operation member 40f and zooming are formed. Operating member 40z is easily operated.
[0067]
Then, by rotating the focusing operation member 40f or the zooming operation member 40z, the focus ring 32 or the zoom ring 33 is rotated to perform focusing or zooming.
[0068]
The opening 4 of the front panel 3 is opened and closed by a lens cover 60 slightly larger than the opening 4 (see FIG. 1).
[0069]
The lens cover 60 includes a plate-shaped member 61 formed of a transparent synthetic resin, for example, polycarbonate (PC), and a translucent coating film 62 formed on the surface of the plate-shaped member 61 (FIG. 8). reference). The coating film 62 is formed so that approximately half of the light applied thereto is transmitted (see FIG. 8).
[0070]
Further, in the lens cover 60, the coating 62 is formed on the surface of the plate-shaped member 61 on the side opposite to the surface facing the front lens 31, that is, on the outer surface. It may be formed on the surface (inner surface) facing the ball lens 31 or may be formed on both surfaces of the plate-like member 61.
[0071]
The lens cover 60 is supported by a support shaft 63 provided diagonally above and right of the opening 4 when viewed from the front of the front panel 3 (see FIG. 1).
[0072]
The support shaft 63 is rotated by a predetermined angle by a rotation mechanism (not shown). With this rotation, the lens cover 60 rotates between a position where the opening 4 is closed and a position where the opening 4 is opened. (See FIG. 1).
[0073]
When the lens cover 60 is in the position where the opening 4 is closed, the front lens 31 is protected.
[0074]
Then, even if the light from the light source unit 11 of the projection display device 1 is projected onto the lens cover 60 by mistake or while the lens cover 60 closes the opening 4 due to a failure of the opening / closing mechanism or the like, almost of the light Since half the amount of light passes through the coating film 62 and is emitted forward, it is possible to reduce heat energy that causes heat storage in the lens cover 60.
[0075]
As a result, heat corresponding to the light energy transmitted through the lens cover 60 is not stored, so that the temperature does not become higher than that of the conventional lens cover formed of an opaque material, and the heat deformation does not occur. I will not.
[0076]
Further, when the lens cover 60 is formed of a mere transparent member, it is difficult to determine at a glance whether the opening 4 is open or closed, but as in the lens cover 60 according to this embodiment, it is difficult to determine whether the opening 4 is open or closed. By forming the transparent coating film 62, it is possible to determine at a glance whether the opening 4 is in the open position or in the closed position. When the power supply switch of the projection display device 1 is turned on while the opening 4 is closed, the erroneous operation can be prevented.
[0077]
In the above-described embodiment, knurling has been described as the operating portions 43f and 43z of the operating members 40f and 40z. However, the present invention is not limited to this. Department.
[0078]
That is, the operating member 70 is formed of a substantially annular member, and the diameter of the left half 71 is formed larger than the diameter of the right half 72 when viewed from the front, and the outer peripheral surface of the left half 71 of the operating member 70 is formed. In addition, an operation element 73 protruding leftward is provided substantially at the center in the vertical direction, and the operation element 73 functions as an operation section of the operation member 70.
[0079]
The distal end of the operation element 73 of the operation member 70 is formed on the left side panel 5 and protrudes from the operation window 6 to the side.
[0080]
Focusing is performed by operating the operation member 70 by moving the operation element 73 protruding from the operation window 6 upward or downward.
[0081]
When the operation element 73 is moved upward or downward, the operation member 70 is rotated, whereby the teeth 74, 74,... Of the right half 72 rotate the focus ring 32, and focusing is performed. .
[0082]
In the above embodiment, the teeth 44f, 44f,... Or 44z, 44z,... Of the operation member 40f or 40z and the teeth 34, 34,. Or 35, 35, ... are engaged with each other, but the present invention is not limited to this, and other gears and the like are interposed therebetween, and the operating portions 43f, 43z are formed by a plurality of gear trains. The rotation may be transmitted to the focus ring 32 or the zoom ring 33.
[0083]
Further, the motion transmission mechanism that transmits the operation (motion) of the operation units 43f and 43z to the focus ring or the zoom ring is not limited to the above-described gear transmission mechanism, but may be a friction transmission mechanism such as a friction wheel, a belt, or the like. A winding transmission mechanism such as a chain can also be used.
[0084]
FIG. 10 to FIG. 13 are schematic diagrams for explaining an installation mode of the projection display device 1.
[0085]
FIG. 10 shows a mode in which the projection display device 1 is placed on a floor 80 and projected on a front wall 81.
[0086]
FIG. 11 shows a mode in which the projection display device 1 is suspended upside down on a ceiling 82 and projected on a front wall 81.
[0087]
FIG. 12 shows a mode in which the projection type display device 1 is placed upside down on a thing having a predetermined height such as a closet 83 and projected on a front wall 81.
[0088]
FIG. 13 shows a mode in which the projection display device 1 is projected on a front wall 81 while being stored in a rack 85 having a storage space 84 with a narrow vertical space.
[0089]
Even when the projection type display device 1 is used in each of the above-described installation modes, the operation units 43f, 43z or the operation elements 73 provided on the left side panel 5 are not hidden, and the operation by the operator is not performed. Since the operation units 43f, 43z or the operation element 73 can be located on the easy surface, the operation of the operation units 43f, 43z or the operation element 73 can be easily performed.
[0090]
It should be noted that the specific shapes and structures of the respective parts shown in the above-described embodiments are merely examples of the specific embodiments to be performed in carrying out the present invention, and the technical scope of the present invention is not limited thereto. Must not be interpreted restrictively.
[0091]
【The invention's effect】
As is clear from the above description, the projection display device of the present invention includes a light source unit, a modulation unit that modulates light from the light source unit, and a projection lens that projects light modulated by the modulation unit. An outer casing that covers these, a projection display device that projects light projected by the projection lens from the front of the outer casing, wherein the projection lens has a focus adjustment unit, and is provided on the front of the outer casing. An operation member having an operation unit exposed on a continuous right side or left side is provided, and the focus adjustment unit is operated by operating the operation member.
[0092]
Therefore, in the projection type display device of the present invention, since the operation unit of the operation member is provided on the right side or the left side continuous with the front surface of the outer casing, the projection type display device can be used in various installation forms. The focus adjustment can be easily performed without hiding the operation section of the operation member, and without being limited to the installation form of the projection display device.
[0093]
In the invention described in claim 2, the focus adjustment unit is a focus ring provided on an outer peripheral surface of a lens barrel, and a plurality of teeth are provided in a circumferential direction of the outer peripheral surface of the focus ring. The operating member has a disk shape or an annular shape, and a plurality of teeth are provided in a circumferential direction of an outer peripheral surface thereof, and the teeth of the operating member and the teeth of the focus ring are engaged with each other to form an outer peripheral portion of the operating member. Is exposed from the right side surface or the left side surface of the outer casing to form the operation unit. Therefore, even when the lens barrel and the operation unit of the operation member are separated from each other, the focus can be reliably adjusted.
[0094]
In the invention described in claim 3 and claim 4, the projection lens has a zoom adjustment unit, and an operation member having an operation unit exposed on a right side surface or a left side surface continuous with the front surface of the outer casing is provided. Since the operation of the zoom adjustment section is performed by operating the operation member, zoom adjustment can be performed in addition to focus adjustment.
[0095]
In the invention described in claims 5 and 6, the zoom adjustment section is a zoom ring rotatably provided on the outer peripheral surface of the lens barrel, and a plurality of zoom adjusters are provided in the outer peripheral surface of the zoom ring in the circumferential direction. The operating member has a disk shape or an annular shape, and a plurality of tooth portions are provided in a circumferential direction of an outer peripheral surface thereof, and the tooth portion of the operating member meshes with the tooth portion of the zoom ring. Since a part of the outer peripheral portion of the operation member is exposed from the right side surface or the left side surface of the outer casing to be the operation portion, even if the lens barrel and the operation portion of the operation member are separated, focus adjustment and operation can be surely performed. Zoom adjustments can be made.
[Brief description of the drawings]
FIG. 1 shows an embodiment of a projection display device of the present invention together with FIG. 2 to FIG. 9, and FIG. 1 is an overall perspective view.
FIG. 2 is an overall configuration diagram for explaining an outline of a projection display device.
FIG. 3 is an enlarged plan view showing the periphery of a lens barrel.
FIG. 4 is a front view of the periphery of a lens barrel.
FIG. 5 is a perspective view of the support base as viewed from the front.
FIG. 6 is a perspective view of the support base as viewed from the rear.
FIG. 7 is a perspective view showing a support base and an operation member separately.
FIG. 8 is an enlarged sectional view of a lens cover.
FIG. 9 is a front view showing a modification of the operation member.
FIG. 10 is a view for explaining an installation mode of the projection type display device of the present invention together with FIG. 11 to FIG. 13, and is a diagram showing a state where the projection type display device is placed on the floor.
FIG. 11 is a diagram illustrating a state in which the projection display device is suspended upside down from the ceiling.
FIG. 12 is a diagram showing a state in which the projection display device is placed upside down on a closet.
FIG. 13 is a diagram showing a state in which the projection display device is stored in a rack having a storage space with a narrow vertical space.
FIG. 14 is a perspective view showing a conventional projection display device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Projection display apparatus, 2 ... Outer housing, 5 ... Left side panel (left side), 11 ... Light source part, 16R ... Liquid crystal panel (modulation means), 16G ... Liquid crystal panel (modulation means), 16B ... Liquid crystal panel ( Modulation means), 18 Projection lens, 32 Focus ring (focus adjustment unit), 33 Zoom ring (Zoom adjustment unit), 34 Teeth, 35 Teeth, 40f Operating member (for focusing), 43f Operating part, 44f tooth, 40z operating member (for zooming), 43z operating part, 44z tooth, 70 operating member, 73 operator (operating part), 74 tooth

Claims (6)

A light source unit, a modulating unit that modulates light from the light source unit, a projection lens that projects the light modulated by the modulating unit, and an outer casing that covers these components. A projection display device that projects from the front of the housing,
The projection lens has a focus adjustment unit,
Provide an operation member with an operation unit exposed on the right side or the left side continuous to the front of the outer casing,
The projection display device, wherein the focus adjustment unit is operated by operating the operation member. The focus adjustment section is a focus ring provided on the outer peripheral surface of the lens barrel,
A plurality of teeth are provided in a circumferential direction of an outer peripheral surface of the focus ring,
The operating member has a disk shape or an annular shape, and a plurality of teeth are provided in a circumferential direction of an outer peripheral surface thereof,
The teeth of the operation member and the teeth of the focus ring are meshed with each other,
2. The projection display device according to claim 1, wherein a part of an outer peripheral portion of the operation member is exposed from a right side surface or a left side surface of the outer casing to be the operation unit. 3. The projection lens has a zoom adjustment unit,
Provide an operation member with an operation unit exposed on the right side or the left side continuous to the front of the outer casing,
2. The projection display device according to claim 1, wherein the operation of the zoom adjustment unit is performed by operating the operation member. The projection lens has a zoom adjustment unit,
Provide an operation member with an operation unit exposed on the right side or the left side continuous to the front of the outer casing,
3. The projection display device according to claim 2, wherein the operation of the zoom adjustment unit is performed by operating the operation member. The zoom adjustment unit is a zoom ring rotatably provided on the outer peripheral surface of the lens barrel,
A plurality of teeth are provided in a circumferential direction of an outer peripheral surface of the zoom ring,
The operating member has a disk shape or an annular shape, and a plurality of teeth are provided in a circumferential direction of an outer peripheral surface thereof,
The teeth of the operation member and the teeth of the zoom ring are meshed,
The projection display device according to claim 3, wherein a part of an outer peripheral portion of the operation member is exposed from a right side surface or a left side surface of the outer casing to be the operation portion. The zoom adjustment unit is a zoom ring rotatably provided on the outer peripheral surface of the lens barrel,
A plurality of teeth are provided in a circumferential direction of an outer peripheral surface of the zoom ring,
The operating member has a disk shape or an annular shape, and a plurality of teeth are provided in a circumferential direction of an outer peripheral surface thereof,
The teeth of the operation member and the teeth of the zoom ring are meshed,
The projection display device according to claim 4, wherein a part of an outer peripheral portion of the operation member is exposed from a right side surface or a left side surface of the outer casing to form the operation portion.

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