KR20180026181A - Projector - Google Patents

Abstract

A projector is disclosed. According to the present invention, the projector has an image output unit in which a lens unit projecting an image or a screen to the front is built. According to the present invention, the lens unit of the projector comprises: a reference barrel; a first lens barrel assembly arranged to be inserted into a front side of the reference barrel; a second lens barrel assembly arranged to be inserted into a rear side of the reference barrel; a cam barrel arranged in the outside of the reference barrel, and controlling a gap between the first lens barrel assembly and the second lens barrel assembly; and an adjustment barrel arranged between the reference barrel and the cam barrel to adjust a position of the second lens barrel assembly.

Description

PROJECTOR {PROJECTOR}

The present invention relates to a projector.

A projector is often used as a projection device for projecting image or screen data onto a screen. The projector can collect the light emitted from the light source on the panel and display it on the screen.

In addition, recently, technology for a micro projector for projecting an image or a screen stored in a portable device on the outside has been rapidly developed.

Such a projector includes a barrel for adjusting the focus displayed on the screen. The barrel can be moved back and forth to adjust the focus by adjusting the distance between the front lens and the rear lens.

On the other hand, when the barrel is of a detachable type rather than an integral type, the moving amount and moving direction of the front lens group and the rear lens group may be different. When the moving distance and the moving direction of the front lens group and the rear lens group are different from each other, the accuracy of the BFL adjustment must be adjusted by adjusting the positions of the front lens group and the rear lens group. In addition, it took a lot of work to get the inaccurate focus.

The present invention is directed to solving the above-mentioned problems and other problems. Another object of the present invention is to provide a projector which can shorten the working time by adding an adjusting barrel capable of adjusting the interval between the rear lens and the prism.

According to an aspect of the present invention, there is provided an image display apparatus including an image output unit including a lens unit for projecting an image or a screen in front of the reference barrel, A second lens barrel assembly disposed to be inserted into a rear surface of the reference barrel, a cam barrel disposed outside the reference barrel for controlling a distance between the first lens barrel assembly and the second lens barrel assembly, And an adjustment barrel disposed between the bezels to adjust the position of the second lens barrel assembly.

The prism is disposed behind the second lens barrel assembly and the adjustment barrel adjusts the position of the second lens barrel assembly so that the first gap between the first lens barrel assembly and the second lens barrel assembly or the gap between the second lens barrel assembly and the prism 2 < / RTI > interval.

The rear end face of the adjustment barrel may include at least one protrusion protruding therefrom.

The adjustment barrel may include at least one adjustment guide hole on both sides thereof.

The adjustment guide hole may include an elongated member extending in the vertical direction intersecting the front-rear direction across the front and rear surfaces of the reference barrel.

The adjustment barrel may include at least one adjustment bushing hole on its upper and lower sides.

The adjusting bushing hole may include a first adjusting bushing hole and a second adjusting bushing hole, and the first adjusting bushing hole and the second adjusting bushing hole may be spaced apart from each other in the front-rear direction.

A pinhole capable of setting the initial position of at least one of the first lens barrel assembly, the second lens barrel assembly, the cam barrel, and the adjustment barrel may be disposed in the adjustment barrel.

The pinhole may be disposed between the first adjusting bushing hole and the second adjusting bushing hole.

Effects of the projector according to the present invention will be described as follows.

According to at least one of the embodiments of the present invention, there is an advantage that the working time can be shortened by easily adjusting the interval between the rear lens and the prism by using the adjustment barrel in a state where the positions of the front lens group and the rear lens group are aligned.

Further scope of applicability of the present invention will become apparent from the following detailed description. It should be understood, however, that the detailed description and specific examples, such as the preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art.

1 is a view showing the appearance of a projector according to an embodiment of the present invention.
2 is a cross-sectional view of an image output unit mounted on a projector according to an embodiment of the present invention.
3 is a cross-sectional view of a lens unit according to an embodiment of the present invention.
4 is an exploded perspective view of a lens unit according to an embodiment of the present invention.
5 is an enlarged perspective view of a reference bevel according to an embodiment of the present invention.
6A is an enlarged perspective view of a cam barrel according to an embodiment of the present invention.
6B is a plan view of a camberel according to an embodiment of the present invention.
7A is an enlarged perspective view of an adjustment bevel according to an embodiment of the present invention.
7B is a top view of the tuning barrel according to one embodiment of the present invention.
8 is a perspective view of a lens portion from which a camberel is removed according to an embodiment of the present invention.
9 is a perspective view of a lens unit according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals are used to designate identical or similar elements, and redundant description thereof will be omitted. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role. In the following description of the embodiments of the present invention, a detailed description of related arts will be omitted when it is determined that the gist of the embodiments disclosed herein may be blurred. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. , ≪ / RTI > equivalents, and alternatives.

Referring to FIG. 1, a projector 100 according to the present invention may include an image output unit 110, a main power unit 130, a focusing unit 150, and a connecting unit 170.

 The projector 100 may have a predetermined external shape while having an internal space. The projector 100 can display an input image or a screen by projecting it to the outside. The projector 100 may include an illumination optical system and a projection optical system. The illumination optical system is an optical system disposed on an optical path from the light source to the display panel, and the projection optical system may be an optical system disposed on the optical path from the display panel to the projection lens.

The video output unit 110 may be disposed on the front surface FS of the projector 100. [ The image output unit 110 may be arranged close to the upper side of the front side FS of the projector 100 and may maintain a predetermined angle with the front side FS. The video output unit 110 may be a part for projecting an image or a screen forward. The image output unit 110 may include a lens unit (not shown). The lens unit can be disposed in the interior space of the projector 100. A detailed description thereof will be described later.

The selection unit 120 may be disposed on the front face FS of the projector 100. [ The selection unit 120 may be disposed close to the upper side of the front surface FS of the projector 100 and may be disposed apart from the image output unit 110. [ The selection unit 120 may have a columnar shape in which a lever protrudes from the front surface FS of the projector 100. [ The selection unit 120 can move one end in the forward, backward, leftward, and rightward directions. That is, the selection unit 120 can function as a joystick. The selection unit 120 can select functions such as menu selection and channel adjustment.

The main power source unit 130 may be disposed on the lower surface DS of the projector 100. [ The main power unit 130 may be a part for turning on / off the power of the projector 100. The main power unit 130 may include a power supply terminal 131 supplied with power from the outside. The main power unit 130 may receive power from the outside through a power supply terminal and store the power in a battery (not shown) disposed in the interior space of the projector 100.

When the main power unit 130 is turned on, the user can turn on / off the power of the projector 100 by clicking the selection unit 120.

The focus portion 150 may be disposed on the seat surface LS of the projector 10. [ The focal point 150 may have a circular shape with a lever partially protruding from the seating surface LS of the projector 100. The focal point 150 may have a mountain and a bone on one side of the protruding circular shape. The focus unit 150 can easily adjust the focus of an image or a screen by rotating the focus unit 150 in a third direction DR3. The projector 100 according to the present invention may not damage the lens when the focus is adjusted because the focus portion 150 is spaced apart from the lens portion (not shown) built in the internal space.

The connecting portion 170 may be disposed on each of the seating surface LS and the bottom surface DS of the projector 100. [ The connecting part 170 may include a first connecting part 170a and a second connecting part 170b. The first connecting part 170a may be separated from the power source part 130 by a predetermined distance in the first direction DR1 on the lower surface DS of the projector 100. [ The second connecting part 170b may be spaced apart from the power supply part 130 in the third direction DR3 by a predetermined distance on the seat surface LS of the projector 100. [ The first direction may be a lateral direction going from the seating surface (LS) to the right side. The second direction DR2 may be a longitudinal direction extending from the upper surface to the lower surface DS. The first direction DR1 may be a direction intersecting with the second direction DR2. The third direction DR3 may be a vertical direction extending from the front surface to the rear surface. The third direction DR3 may be a direction intersecting both the first direction DR1 and the second direction DR2.

The first and second connecting parts 170a and 170b may be parts for transmitting signals to the projector 100. [ For example, the first and second connecting parts 170a and 170b may transmit signals such as an image and a power source. The first and second connecting units 170a and 170b may include a USB terminal, an HDMI / MHL terminal, an AV terminal, an earphone hole, and an RGB terminal.

In addition, the projector 100 may be provided with a bulging portion 190 on the left side and the right side. The communicating portion 190 may include a plurality of holes. The projector 100 can easily discharge the heat generated inside the projector 100 through the plurality of holes to the outside.

2, an image output unit 110 according to an exemplary embodiment of the present invention includes a direction switching unit 110a and a lens unit 110b that can reflect light supplied through the lens unit 110b in different directions. ).

The direction switching unit 110a may be disposed in front of the lens unit 110b in the internal space of the projector 100. [ The redirecting unit 110a may include at least one mirror M. [ The redirection unit 110a can illuminate the uniformed light from the lens unit 110b and reflect the uniformed light in the other direction. The direction switching unit 110a can reflect the uniformed light to the external screen 111 of the image output unit 110. [ The light emitted from the external screen 111 of the image output unit 110 may be output to an external screen.

3 and 4, the lens unit 110b includes a reference barrel BB, a first lens barrel assembly LBA1, a second lens barrel assembly LBA2, a cam barrel CB, and a control barrel AB. . ≪ / RTI >

The reference barrel BB can be arranged in a columnar shape in which the front and rear surfaces are opened. At least one reference bushing hole (BBH1, BBH2) may be disposed on the peripheral surface of the reference barrel (BB) disposed between the front surface and the rear surface. The reference bushing holes BBH1 and BBH2 may be arranged to penetrate the peripheral surface of the reference barrel BB. The reference bushing holes BBH1 and BBH2 may be arranged in a rectangular shape.

The first lens barrel assembly LBA1 may be disposed on the front surface of the reference barrel BB. The first lens barrel assembly LBA1 may include a first lens cover LC1 and a plurality of front lenses FL.

The first lens cover LC1 may be arranged to be inserted into the front face of the reference barrel BB. The first lens cover LC1 may be formed in a cylindrical shape whose front and rear surfaces are off. The first lens cover LC1 may have a diameter smaller than the diameter of the reference barrel BB so that it can be inserted into the reference barrel BB.

The first lens cover LC1 may be provided with a first lens bushing groove LBH1 on the upper side of the circumferential surface thereof. The first lens bushing groove LBH1 may be disposed adjacent to the rear surface of the first lens cover LC1. The first lens bushing groove LBH1 is formed in such a manner that the first reference bushing hole BBH1 of the reference barrel BB and the first reference bushing hole BBH1 of the first lens barrel assembly LBA1 are inserted into the reference barrel BB, ). ≪ / RTI > The first lens cover LC1 may be provided with a third lens bushing groove (not shown) on the lower side of the circumferential surface. The third lens bushing groove (not shown) may be disposed adjacent to the rear surface of the first lens cover LC1. The third lens bushing groove (not shown) is formed in the center of the reference barrel BB while the first lens barrel assembly LBA1 is inserted and disposed in the reference barrel BB and the third reference bushing hole BBH3 in the vertical direction DRU, DRD). ≪ / RTI >

The first lens cover LC1 may include at least one front lens FL in the inner space. The plurality of front lenses FL can be sequentially arranged in contact with each other or maintaining a constant interval in the first lens cover LC1. The plurality of front lenses FL includes a condensing lens for condensing light, a collimator lens for matching a far distance to a virtual limited space, a fly-eye lens ), An illumination lens for illuminating the light, and an anamorphic lens for changing the magnification of the light. The plurality of front lenses (FL) include a meniscus convex lens whose both sides of the lens are bent in the same direction, a biconvex lens whose both sides are bent in different directions, and a convex lens And a curved flat convex lens (Plano ?? concave). Further, the plurality of front lenses FL may include glass or plastic.

 The second lens barrel assembly LBA2 may be disposed on the rear surface of the reference barrel BB. The second lens barrel assembly LBA2 may include a second lens cover LC2 and a plurality of rear lenses RL.

The second lens cover LC2 may be arranged to be inserted into the rear surface of the reference barrel BB. The first lens cover LC1 may be formed in a cylindrical shape whose front and rear surfaces are off. The second lens cover LC2 may have a diameter smaller than the diameter of the reference barrel BB so that it can be inserted into the reference barrel BB.

The second lens cover LC2 may be provided with a second lens bushing groove LBH2 on the upper side of the circumferential surface. The second lens bushing groove LBH2 may be disposed adjacent to the front surface of the second lens cover LC2. The second lens bushing groove LBH2 is formed so as to intersect with the second reference bushing hole BBH2 of the reference barrel BB and the up and down directions DRU and DRD while the second lens barrel assembly LBA2 is inserted into the reference barrel BB, ). ≪ / RTI > The second lens cover LC2 may be provided with a fourth lens bushing groove (not shown) on the lower surface of the circumferential surface. The fourth lens bushing groove (not shown) may be disposed adjacent to the front surface of the second lens cover LC2. A fourth lens bushing groove (not shown) is formed in the fourth lens bushing hole BBH4 of the reference barrel BB and the second lens bushing groove BBU4 of the second lens barrel assembly LBA2 in the vertical direction DRU, DRD). ≪ / RTI >

The second lens cover LC2 may include at least one rear lens RL in the inner space. The plurality of rear lenses RL may be sequentially arranged in contact with each other or maintaining a constant interval in the second lens cover LC2. The plurality of rear lenses RL may include at least one of a condensing lens, a collimator lens, a fly-eye lens, an illumination lens, and an anamorphic lens. The plurality of rear lenses (RL) includes a meniscus convex lens in which both surfaces of the lens are bent in the same direction, a biconvex lens in which both surfaces of the lens are bent in different directions, And a curved flat convex lens (Plano ?? concave). Further, the plurality of rear lenses RL may include glass or plastic.

In addition, the second lens barrel assembly LBA2 may be provided with a prism PSM disposed behind the second lens barrel assembly LBA2. A plurality of lights can be supplied to the second lens barrel assembly LBA2 through the prism PSM.

The cam barrel CB is disposed outside the reference barrel BB and can control the distance between the first lens barrel assembly LBA1 and the second lens barrel assembly LBA2. The reference barrel BB may be inserted into the cam barrel CB.

The cam barrel CB can be arranged in a columnar shape in which front and rear surfaces are opened. At least one cam bushing hole CBH1 to CBH4 may be disposed on the circumferential surface of the cam barrel CB disposed between the front surface and the rear surface. The cam bushing holes CBH1 to CBH4 may be disposed on the upper side of the circumferential surface. The cam bushing holes CBH1 to CBH4 can be arranged in a circular shape elongated in the left and right directions DRLE and DRRI. The cam bushing holes CBH1 to CBH4 can be arranged to penetrate the peripheral surface of the cam barrel CB.

The adjustment barrel AB can be disposed between the reference barrel BB and the cam barrel CB to adjust the position of the second lens barrel assembly LBA2. The adjustment barrel AB can be arranged in a columnar shape in which front and rear surfaces are opened. The adjustment barrel AB may be inserted and disposed in the cam barrel CB. The reference barrel BB may be inserted and arranged in the adjustment barrel AB. The diameter of the adjustment barrel AB may be larger than the diameter of the reference barrel BB and smaller than the diameter of the cam barrel CB.

The adjustment barrel AB may be provided with a plurality of adjustment bushing holes ABH1 to ABH4 and a plurality of adjustment guide holes AGH1 to AGH2 on the circumferential surface disposed between the front and rear surfaces. The plurality of adjustment bushing holes ABH1 to ABH4 may be disposed apart from the upper or lower surface of the circumferential surface. A plurality of adjustment guide holes (AGH1 to AGH2) may be disposed on both sides of the circumferential surface. The adjustment bushing holes ABH1 to ABH4 and the adjustment guide holes AGH1 to AGH2 may be arranged in a circular shape. Some of the adjustment bushing holes ABH1 to ABH4 may be arranged in a circular shape elongated in the forward and backward directions DRF and DRRE. The adjustment guide holes AGH1 to AGH2 can be arranged in a circular shape elongated in the up and down directions DRU and DRD.

The adjustment barrel AB adjusts the position of the second lens barrel assembly LBA2 to adjust the first gap between the first lens barrel assembly LBA1 and the second lens barrel assembly LBA2 or the first gap between the second lens barrel assembly LBA2 and the second lens barrel assembly LBA2, And the second interval between the prism (PSM). That is, the adjustment barrel AB can adjust the second gap while fixing the first lens barrel assembly LBA1, the second lens barrel assembly LBA2, and the cam barrel CB. Here, the second distance may be the distance between the last lens mounted on the rear of the lens mounted on the second lens barrel assembly LBA2 and the prism PSM.

Referring to FIG. 5, at least one reference bushing hole BBH1 and BBH2 may be disposed on the peripheral surface of the reference barrel BB disposed between the front surface and the rear surface. The reference bushing holes BBH1 and BBH2 may include a first reference bushing hole BBH1 to a fourth reference bushing hole BBH4.

The first reference bushing hole BBH1 may be disposed on the upper side of the circumferential surface, but may be disposed adjacent to the front surface. The second reference bushing hole BBH2 is disposed on the upper side of the circumferential surface, but may be disposed adjacent to the rear surface. The second reference bushing hole BBH2 may be disposed apart from the first reference bushing hole BBH1 and the front and rear directions DRF and DRRE. The third reference bushing hole BBH3 is disposed on the lower side of the circumferential surface, and may be disposed adjacent to the front surface. The third reference bushing hole BBH3 may be disposed opposite to the first reference bushing hole BBH1. The fourth reference bushing hole BBH4 may be disposed on the lower side of the circumferential surface, but adjacent to the rear surface. The fourth reference bushing hole BBH4 may be disposed opposite to the second reference bushing hole BBH2.

The first reference bushing hole BBH1 may have an area larger than the area of the second reference bushing hole BBH2. The third reference bushing hole BBH3 may have an area larger than that of the fourth reference bushing hole BBH4.

The reference barrel BB may have a first reference guide groove BGH1 and a second reference guide groove BGH2 on both sides of the circumferential surface. The first reference guide groove BGH1 and the second reference guide groove BGH2 may be disposed opposite to each other. The two reference guide grooves disposed on both side surfaces of the circumferential surface may be disposed between the second reference bushing hole BBH2 and the fourth reference bushing hole BBH4.

The reference barrel BB may include a support member BBS extending from the rear surface of the circumferential surface. The support member BBS has a predetermined thickness and may be formed in a substantially rectangular shape. In addition, at least one mounting hole H may be disposed in the extended region extending from the rear end surface of the reference barrel BB in the support member BBS. The mounting member (not shown) may be fixed to the inner space of the projector 100 through the mounting hole H. The support member BBS can be disposed on the rear end surface of the reference barrel BB to rigidly mount the reference barrel BB in the inner space of the projector 100. [

6A and 6B, at least one cam bushing hole CBH1 to CBH4 may be disposed on the circumferential surface of the cam barrel CB disposed between the front surface and the rear surface. The cam bushing holes CBH1 to CBH4 may be disposed on the upper or lower side of the circumferential surface. The cam bushing holes CBH1 to CBH4 can be arranged in a circular shape elongated in the left and right directions DRLE and DRRI. The cam bushing holes CBH1 to CBH4 can be arranged to penetrate the peripheral surface of the cam barrel CB.

The cam bushing holes CBH1 to CBH4 may include a first cam bushing hole CBH1 to a fourth cam bushing hole CBH4.

The second cam bushing hole CBH2 is disposed on the upper surface of the circumferential surface, but may be disposed adjacent to the rear surface. The second cam bushing hole CBH2 may be spaced apart from the first cam bushing hole CBH1 in the forward and backward directions DRF and DRRE. The third cam bushing hole CBH3 is disposed on the lower side of the circumferential surface, and may be disposed adjacent to the front surface. The third cam bushing hole CBH3 may be disposed opposite to the first cam bushing hole CBH1. The fourth cam bushing hole CBH4 is disposed on the lower side of the circumferential surface, but may be disposed adjacent to the rear surface. The fourth cam bushing hole CBH4 may be disposed opposite to the second cam bushing hole CBH2.

The first cam bushing hole CBH1 is disposed in the left and right directions DRLE and DRRI and can be inclined at a predetermined angle with respect to the front face. For example, the first cam bushing hole CBH1 may include one side disposed closer to the left side and the other side disposed closer to the right side. And the other side may be disposed adjacent to the front side than the other side. Accordingly, the first cam bushing hole CBH1 may be disposed such that one side is farther from the front than the other side. The third cam bushing hole CBH3 is disposed in the left and right directions DRLE and DRRI and can be inclined at a predetermined angle with respect to the front face. For example, the third cam bushing hole CBH3 may include one side disposed closer to the left side and the other side disposed closer to the right side. One side may be disposed adjacent to the front side than the other side. The third cam bushing hole CBH3 may be disposed such that the other side is farther from the front than the other side.

Alternatively, the second cam bushing hole CBH2 and the fourth cam bushing hole CBH4 may be disposed in parallel with the left and right directions DRLE and DRRI.

Further, the cam barrel CB may include a cam pin hole CSP1. The cam pinhole CSP1 is disposed on the upper surface of the circumferential surface, and may be arranged in a circular shape. The cam pinhole CSP1 may be disposed between the first cam bushing hole CBH1 and the second cam bushing hole CBH2.

The cam barrel CB may include a gear portion CBF connected to the focus portion 150 (see FIG. The gear portion CBF may be arranged in the form of a toothed wheel. The gear portion CBF may be arranged in a circular shape. The gear portion CBF operates as a pair with the focal portion 150 (see Fig. 1), and the teeth of the gear portion CBF and the teeth of the focal portion 150 (see Fig. 1) engage with each other to transmit rotational motion and rotational force without slip Or can be added or subtracted. That is, when the focusing unit 150 (see FIG. 1) rotates, the gear unit CBF engaged with the focusing unit 150 (see FIG. The cam barrel CB can be rotated or moved clockwise or counterclockwise. For example, when the cam barrel CB is rotated clockwise or counterclockwise, the first lens barrel assembly LBA1 coupled to the first cam bushing hole CBH1 and the third cam bushing hole CBH3, The gap between the second cam bushing hole CBH2 and the second lens barrel assembly LBA2 coupled to the fourth cam bushing hole CBH4 may be narrowed or widened.

7A and 7B, the adjustment barrel AB may have a plurality of adjustment bushing holes ABH1 to ABH4 and a plurality of adjustment guide holes AGH1 to AGH2 disposed on the circumferential surface disposed between the front surface and the rear surface have. The plurality of adjustment bushing holes ABH1 to ABH4 may be arranged in a circular shape spaced apart from the upper side of the circumferential surface.

The plurality of adjusting bushing holes ABH1 to ABH4 may include first to fourth adjusting bushing holes ABH1 to ABH4.

The first adjusting bushing hole ABH1 is disposed on the upper side of the circumferential surface, but may be disposed adjacent to the front surface. The first adjusting bushing holes ABH1 are arranged in a circular shape and can be elongated in the forward and backward directions DRF and DRRE. The second adjusting bushing hole ABH2 is disposed on the upper side of the circumferential surface, but may be disposed adjacent to the rear surface. The second adjusting bushing hole ABH2 may be arranged in a circular shape. The area of the second adjusting bushing hole ABH2 may be smaller than the area of the first adjusting bushing hole ABH1. The third adjusting bushing hole ABH3 is disposed on the lower side of the circumferential surface, and may be disposed adjacent to the front surface. The third adjusting bushing hole ABH3 may be disposed opposite to the first adjusting bushing hole ABH1. The third adjusting bushing hole ABH3 may be substantially the same shape as the first adjusting bushing hole ABH1. The fourth adjusting bushing hole ABH4 is disposed on the lower side of the circumferential surface, but may be disposed adjacent to the rear surface. The fourth adjusting bushing hole ABH4 may be disposed opposite to the second adjusting bushing hole ABH2. The fourth adjusting bushing hole ABH4 may be substantially the same shape as the second adjusting bushing hole ABH2.

The plurality of adjustment guide holes AGH1 to AGH2 may include a first adjustment guide hole AGH1 and a second adjustment guide hole AGH2.

The first adjustment guide hole AGH1 is disposed on the right side of the circumferential surface, but may be disposed adjacent to the rear surface. The first adjustment guide holes AGH1 are arranged in a circular shape and can be elongated in the up and down directions DRU and DRD. The first adjusting guide hole AGH1 may be disposed between the second adjusting bushing hole ABH2 and the fourth adjusting bushing hole ABH4. The second adjustment guide hole AGH2 is disposed on the left side of the circumferential surface, but may be disposed adjacent to the rear surface. The second adjustment guide hole (AGH2) can be disposed opposite to the first adjustment guide hole (AGH1). The second adjustment guide hole (AGH2) can be arranged in substantially the same shape as the first adjustment guide hole (AGH1). And the second adjustment guide hole AGH2 may be disposed between the second adjustment bush hole ABH2 and the fourth adjustment bush hole ABH4.

In addition, the adjustment barrel AB may include an adjustment pinhole ASP1. The adjustment pinhole ASP1 is disposed on the upper side of the circumferential surface, and can be arranged in a circular shape. The adjusting pinhole ASP1 may be disposed between the first adjusting bushing hole ABH1 and the second adjusting bushing hole ABH2.

The adjustment barrel AB may have at least one projection ABF1, ABF2 protruding from its rear end face. The projections ABF1 and ABF2 may include a first projection ABF1 and a second projection ABF2. The first projection ABF1 may be disposed on the right side of the rear end face. The second projection ABF2 may be disposed on the left side of the rear end surface.

A first buffer hole (ABS1) may be disposed at the lower end of the first projection (ABF1). The first buffer hole ABS1 may be disposed between the first adjustment guide holes AGH1 to AGH2 and the first projection ABF1. That is, the first buffering hole ABS1 is spaced apart from the rear end surface of the adjusting barrel AB, and may be disposed long along the right end surface of the rear end surface of the adjusting barrel AB. A second buffer hole (ABS2) may be disposed at the lower end of the second projection (ABF2). The second buffering hole ABS2 may be disposed between the second adjustment guide holes AGH1 to AGH2 and the second projection ABF2. That is, the second buffering hole ABS2 is spaced apart from the rear end surface of the adjustment barrel AB, and may be disposed along the left end surface of the rear end surface of the adjustment barrel AB.

In addition, the adjustment barrel AB may be provided with the first fastening hole H1 on the upper side of the rear end face. The first fastening hole H1 may be disposed apart from the second adjusting bushing hole ABH2. The adjustment barrel AB may be provided with the second fastening hole H2 on the lower side of the rear section. The second fastening hole H2 may be spaced apart from the fourth adjusting bushing hole ABH4. The first fastening hole H1 and the second fastening hole H2 may be arranged in a circular shape.

The first fastening hole H1 may be engaged with the seventh bushing engaging member N7 to fix the reference barrel BB and the adjustment barrel AB. The second fastening hole H2 may be coupled with an eighth bushing engagement member (not shown) to fix the reference barrel BB and the adjustment barrel AB.

8, the lens unit 110b includes a reference barrel BB, a first lens barrel assembly LBA1, a second lens barrel assembly LBA2, a cam barrel CB, and an adjustment barrel AB . Fig. 8 shows a state before the cam barrel CB is inserted.

The first lens barrel assembly LBA1 may be inserted into the front surface of the reference barrel BB and the second lens barrel assembly LBA2 may be inserted into the rear surface of the reference barrel BB. The reference barrel BB may be inserted and arranged in the adjustment barrel AB.

The first front bushing member FB1 may be disposed in contact with the first lens bushing groove LBH1 disposed on the upper side of the first lens cover LC1. The first front bushing member FB1 includes a first reference bushing hole BBH1 disposed on the upper side of the reference barrel BB and a first adjustment bushing hole ABH1 disposed on the upper side of the regulation barrel AB in sequence As shown in FIG. The first bushing engagement member N1 may be coupled to the first front bushing member FB1.

The first rear bushing member RB1 may be disposed in contact with the second lens bushing groove LBH2 disposed on the upper side of the second lens cover LC2. The first rear bushing member RB1 includes a second reference bushing hole BBH2 disposed on the upper side of the reference barrel BB and a second adjustment bushing hole ABH2 disposed on the upper side of the adjustment barrel AB . And the second bushing engagement member N2 may be coupled to the first rear bushing member RB1.

 The second front bushing member FB2 may be disposed in contact with the third lens bushing groove LBH3 disposed on the lower side of the first lens cover LC1. The second front bushing member FB2 includes a third reference bushing hole BBH3 disposed on the lower side of the reference barrel BB and a third adjustment bushing hole ABH3 disposed on the lower side of the adjustment barrel AB As shown in FIG. And the third bushing engagement member N3 may be coupled to the second front bushing member FB2.

The second rear bushing member RB2 may be disposed in contact with the fourth lens bushing groove LBH4 disposed on the lower side of the second lens cover LC2. The second rear bushing member RB2 has a fourth reference bushing hole BBH4 disposed on the lower side of the reference barrel BB and a fourth reference bushing hole ABH4 disposed on the lower side of the adjustment barrel AB . And the fourth bushing engaging member N4 may be coupled to the second rear bushing member RB2.

The first guide bushing member GB1 may be disposed in contact with a first guide bushing hole (not shown) disposed on the right side of the reference barrel BB. The first guide bushing member GB1 may be disposed through the first adjustment guide holes AGH1 to AGH2 disposed on the right side of the adjustment barrel AB. The fifth bushing engaging member N5 may be coupled to the first guide bushing member GB1.

The second guide bushing member GB2 may be disposed in contact with a second guide bushing hole (not shown) disposed on the left side of the reference barrel BB. The second guide bushing member GB2 may be disposed through the second adjustment guide holes AGH1 to AGH2 disposed on the left side of the adjustment barrel AB. And the sixth bushing engaging member N6 may be coupled to the second guide bushing member GB2.

9, the cam barrel CB is coupled to the first front bushing member FB1, the second front bushing member FB2, the first rear bushing member RB1, and the second rear bushing member RB2 .

The first front bushing member FB1 may be inserted into the first cam bushing hole CBH1 disposed on the upper side of the cam barrel CB. The first front bushing member FB1 sequentially passes through the first cam bushing hole CBH1, the first adjusting bushing hole ABH1, and the first reference bushing hole BBH1, and is guided to the first lens bushing groove LBH1 .

The first rear bushing member RB1 may be inserted into a second cam bushing hole CBH2 disposed on the upper side of the cam barrel CB. The first rear bushing member RB1 sequentially passes through the second cam bushing hole CBH2, the second adjusting bushing hole ABH2, and the second reference bushing hole BBH2 to the second lens bushing groove LBH2 .

The second front bushing member FB2 may be inserted and disposed in the third cam bushing hole CBH3 disposed on the lower side of the cam barrel CB. The second front bushing member FB2 sequentially passes through the third cam bushing hole CBH3, the third adjusting bushing hole ABH3, and the third reference bushing hole BBH3 to sequentially pass through the third lens bushing groove LBH3 .

The second rear bushing member RB2 may be inserted into the fourth cam bushing hole CBH4 disposed on the lower side of the cam barrel CB. The second rear bushing member RB2 sequentially passes through the fourth cam bushing hole CBH4, the fourth adjusting bushing hole ABH4, and the fourth reference bushing hole BBH4 to sequentially pass through the fourth lens bushing groove LBH4 .

The lens unit 110b includes a setting pin P capable of setting an initial position of the first lens barrel assembly LBA1 and the second lens barrel assembly LBA2 to the cam pin hole CSP1 and the adjustment pin hole ASP1, Lt; / RTI > The setting pin P may be coupled through the cam pin hole CSP1 and the adjustment pin hole ASP1 sequentially.

The lens portion 110b is configured to engage the fifth bushing engagement member N5 to the first guide bushing member GB1 and the sixth bushing engagement member N6 to the second guide bushing member GB2, The lens barrel assembly LBA1, the second lens barrel assembly LBA2, and the cam barrel CB can be fixed.

The lens unit 110b couples the setting pin P to the cam pin hole CSP1 and the adjustment pin hole ASP1 and then connects the first lens barrel assembly LBA1, the second lens barrel assembly LBA2 and the cam barrel CB In the fixed state, the positions of these can be finely adjusted by using the adjustment barrel AB. The lens unit 110b can easily and precisely adjust the initial positions of the first lens barrel assembly LBA1, the second lens barrel assembly LBA2 and the cam barrel CB through the adjustment barrel AB.

The lens unit 110b thus adjusted removes the setting pin P from the cam pinhole CSP1 and the adjustment pinhole ASP1 and adjusts the adjustment barrel AB to the fifth bushing engagement member N5 and the sixth bushing engagement And can be fixed to the reference barrel BB using the member N6.

In addition, the adjustment barrel AB may include a first projection ABF1 and a second projection ABF2 at a rear end face. The first projection ABF1 and the second projection ABF2 are arranged such that the lens portion 110b is moved to the first lens barrel assembly LBA1, the second lens barrel assembly LBA2, and the cam barrel CB It is possible to prevent a clearance between the reference barrel BB, the adjusted barrel AB and the cam barrel CB from being generated while adjusting the position of the reference barrel BB, the adjustment barrel AB, and the cam barrel CB.

That is, since the first projection ABF1 and the second projection ABF2 are disposed on the rear end surface of the adjustment barrel AB, a repulsive force to push the adjustment barrel AB forward can be generated. The lens unit 110b can remove the clearance generated between the reference barrel BB, the adjusted barrel AB and the cam barrel CB by using the repulsive force. The adjustment barrel AB can be fixed to the reference barrel BB without any clearance between the barrels BB, AB and CB. The second lens barrel assembly LBA2 and the prism PSM are separated from each other by the adjustment barrel AB in a state in which there is no clearance between the barrels BB, And the adjustment barrel AB is fixed to the reference barrel BB, it is possible to prevent the second gap from being distorted.

In addition, the adjustment barrel AB can more effectively utilize the repulsive force by disposing the first buffer hole ABS1 and the second buffer hole ABS2 at the lower ends of the first projection ABF1 and the second projection ABF2. In particular, the adjustment barrel AB overlaps with the reference barrel BB, so that the repulsive force can be generated more effectively. Therefore, the lens portion 110b can prevent the clearance between the reference barrel BB, the adjusted barrel AB, and the cam barrel CB more completely.

Each embodiment and / or configuration of the present invention may be combined with one another. Means that the A configuration described in the specific embodiment and / or the drawings may be combined with the B configuration described in other embodiments and / or drawings, for example. That is, even if the connection between the components is not described directly, it means that the connection is possible except when the connection is described as impossible. This is obvious when considering that the present invention is for a projector.

The foregoing detailed description should not be construed in all aspects as limiting and should be considered illustrative. The scope of the present invention should be determined by rational interpretation of the appended claims, and all changes within the scope of equivalents of the present invention are included in the scope of the present invention.

Claims (9)

And an image output unit having a lens unit for projecting an image or a screen in front,
The lens unit
Standard berel;
A first lens barrel assembly disposed to be inserted into a front surface of the reference barrel;
A second lens barrel assembly disposed to be inserted into a rear surface of the reference barrel;
A cam barrel disposed outside the reference barrel and controlling a distance between the first lens barrel assembly and the second lens barrel assembly; And
An adjustment barrel disposed between the reference barrel and the cam barrel to adjust a position of the second lens barrel assembly;
. The method according to claim 1,
A prism is disposed behind the second lens barrel assembly,
The tuning barrel
And adjusting a position of the second lens barrel assembly to adjust a first gap between the first lens barrel assembly and the second lens barrel assembly or a second gap between the second lens barrel assembly and the prism. The method according to claim 1,
And at least one protrusion protrudes from a rear end surface of the adjustment bevel. The method according to claim 1,
Wherein the adjustment barrel includes at least one adjustment guide hole on both sides thereof. 5. The method of claim 4,
And the adjustment guide hole is elongated in the vertical direction crossing the front-rear direction crossing the front and rear surfaces of the reference barrel. 6. The method of claim 5,
Wherein the adjustment barrel includes at least one or more adjustment bushing holes on the upper and lower sides thereof. The method according to claim 6,
Wherein the adjusting bushing hole includes a first adjusting bushing hole and a second adjusting bushing hole,
Wherein the first adjusting bushing hole and the second adjusting bushing hole are spaced apart from each other in the front-rear direction. 8. The method of claim 7,
Wherein a pinhole capable of setting at least one of an initial position of the first lens barrel assembly, the second lens barrel assembly, the cam barrel, and the adjustment barrel is disposed in the adjustment barrel. 9. The method of claim 8,
Wherein the pinhole is disposed between the first adjusting bushing hole and the second adjusting bushing hole.

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