JP2015040925A - Screen position adjustment jig of projection device and screen position adjustment method of projection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To adjust a screen position of an optical engine mounted on a projection device, with high accuracy in a short time.SOLUTION: A screen position adjustment jig 100 includes an optical engine holding part 10 holding an optical engine 50, a screen part (comprising a jig screen 20 and a screen base 27) on which a projected image projected by the optical engine 50 is reflected, and a connection part 30 connecting the optical engine holding part 10 and the screen part (comprising the jig screen 20 and the screen base 27). The optical engine holding part 10 of the screen position adjustment jig 100 includes an engine enclosure holding part 1 holding an engine enclosure 51 and a substrate unit holding part 2 holding a substrate unit 53 and adjusting a position of an image display element 56 relative to the engine enclosure 51.

Description

  The present invention relates to a screen position adjustment jig and a screen position adjustment method for a projection apparatus such as a projector or a rear projection apparatus. In particular, in the optical engine unit of the projection apparatus, position adjustment between an image display element such as a digital micro mirror device (DMD) and a projection optical system such as a projection lens (PJ lens), tilt and shift of the projection screen Regarding correction.

  In a video display device that displays video, a projector such as a projector that enlarges and projects video light on a screen by a projection lens has been commercialized and popularized because of the demand for a large screen. Such a projection device is an effective display unit when a large number of people can view a video with a sense of realism.

  By the way, such a projection apparatus enlarges and projects an image by disposing a main body including an optical engine that emits image light away from a screen that is a projection target. In this case, it is necessary to set an appropriate projection direction according to the position of the projection lens provided in the optical engine and the position of the screen. If the projection direction is not appropriate, the image may be displayed at a position shifted from the screen, or the image may be distorted on the screen.

  For example, the projection apparatus of Patent Document 1 includes an adjustment mechanism that allows the user to adjust the vertical angle and horizontal angle of the projection direction. In the projection apparatus of Patent Document 1, an optical engine housing case in which an optical engine is housed is housed in a projector main body housing, and the angle of the optical engine housing case is adjusted by an adjustment mechanism, so The horizontal angle was adjusted.

JP-T-2006-106078 (Steps 0029 to 0035, FIG. 1)

  When a projection apparatus such as a projector or a rear projection apparatus is configured by incorporating the projection apparatus disclosed in Patent Document 1, the tilt of the screen can be adjusted by rotating the optical engine housing case with an adjustment mechanism. The screen position shift (shift) cannot be adjusted. Moreover, since the projection apparatus of patent document 1 has adjusted the optical engine itself with the adjustment mechanism, there existed a problem that a large-scale adjustment mechanism was needed.

  The present invention has been made to solve the above-described problems, and the screen position adjustment of an optical engine mounted on a projection apparatus that requires high-accuracy screen position adjustment is highly accurate and short. An object is to obtain a screen position adjusting jig and a screen position adjusting method that can be performed in time.

The screen position adjustment jig of the projection apparatus of the present invention includes a light source, a substrate unit on which the image display element is fixed, an illumination optical system that focuses light from the light source on the image display element, and reflection from the image display element. A screen position of an image projected on a screen by an optical engine including a projection optical system including a PJ lens for enlarging and projecting light onto a screen, and an engine housing holding a light source, a substrate unit, an illumination optical system, and a projection optical system A screen position adjustment jig of a projection device used for adjustment, comprising: an optical engine holding unit that holds an optical engine; a screen unit that projects a projection image projected by the optical engine; and an optical engine holding unit and a screen unit. The optical engine holding part includes an engine case holding part that holds the engine case, a substrate unit, and an image with respect to the engine case. And having a substrate unit holding unit for adjusting the position of 示素Ko.

  According to the screen position adjusting jig of the projection device of the present invention, the optical engine holding unit holds the substrate unit and has the substrate unit holding unit for adjusting the position of the image display element with respect to the engine housing. The screen position of the mounted optical engine can be adjusted with high accuracy and in a short time.

It is a figure which shows the screen position adjustment jig by Embodiment 1 of this invention. It is a figure which shows the structure of an optical engine. FIG. 2 is a diagram in which an optical engine is mounted on the screen position adjustment jig of FIG. FIG. 4 is an enlarged view of a mounting portion on which the optical engine in FIG. 3 is mounted. It is a figure which shows the optical engine holding | maintenance part of FIG. It is a figure which shows the board | substrate unit holding part of FIG. It is a figure explaining the screen position adjustment method. It is the figure which looked at FIG. 7 from the top. It is a figure explaining the screen position adjustment method. It is the figure which looked at FIG. 9 from the top. It is a figure which shows a focus adjustment jig. It is a bird's-eye view of FIG. It is a figure which shows the screen position adjustment jig by Embodiment 2 of this invention.

  Hereinafter, a screen position adjusting jig and a screen position adjusting method for a projection apparatus according to the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited by this embodiment.

Embodiment 1 FIG.
FIG. 1 is a diagram showing a screen position adjusting jig according to Embodiment 1 of the present invention. FIG. 2 is a diagram showing a configuration of the optical engine, and FIG. 3 is a diagram in which the optical engine is mounted on the screen position adjusting jig of FIG. 4 is an enlarged view of a mounting portion on which the optical engine in FIG. 3 is mounted. FIG. 5 is a diagram showing the optical engine holding unit of FIG. 1, and FIG. 6 is a diagram showing the substrate unit holding unit of FIG. The screen position adjusting jig 100 connects the optical engine holding unit 10 that holds the optical engine 50, the screen base 27, the jig screen 20, the screen base 27 that fixes the jig screen 20, and the optical engine holding unit 10. The connecting part 30 is provided. The jig screen 20 and the screen stand 27 constitute a screen portion.

The optical engine 50 that is the target for executing the screen position adjustment will be described with reference to FIG. The optical engine 50 includes a substrate unit 53 on which a light source 52 such as a lamp and an image display element 56 (see FIG. 10) such as a digital micromirror device (DMD) that displays signal-processed video information are mounted. An illumination optical system 54 that condenses the light from the light source 52 onto the image display element 56, a projection optical system such as a PJ lens 55 that magnifies and projects the reflected light from the image display element 56, and an engine that holds these. The housing 51 and the cover 58 are included. Here, the light source 52, the illumination optical system 54, the PJ lens 55, and the substrate unit 53 are mounted on the engine casing 51 and are held by the engine casing 51. Image display element 5
6 is fixed to the substrate unit 53.

  The screen position accuracy and focus accuracy in the projection apparatus are mainly determined by the relative positional relationship between the PJ lens 55 of the optical engine 50 and the image display element 56 provided in the substrate unit 53. Although the screen size of the projection device varies depending on the projection distance, the image projected on the image display element 56 is normally enlarged and projected 100 times or more by the PJ lens 55. For this reason, for example, when it is necessary to adjust the screen position within ± 5 mm on the projection screen, it is necessary to adjust the position of the image display element 56 with high accuracy within ± 0.05 mm.

  The screen position adjustment and focus adjustment of the optical engine 50 will be described. First, focus adjustment of the optical engine 50 is performed. The focus adjustment is performed using a focus adjustment jig 500 shown in FIGS. 11 is a view showing a focus adjustment jig, and FIG. 12 is a bird's-eye view of FIG. The focus adjustment jig 500 includes a jig screen 501 on which size marks 505a, 505b, 505c, 505d, and 505e indicating the target screen size are drawn, an optical engine holding unit 502 that holds the optical engine 50, and The mount unit 503 includes a slide rail 504 so that the position of the mount unit 503 can be freely changed with respect to the jig screen 501 in accordance with a set distance targeted for focus adjustment. .

  The focus adjustment is an operation for adjusting the relative positional relationship of the distance between the PJ lens 55 and the image display element 56. First, the optical engine 50 with the cover 58 removed is installed in the optical engine holding unit 502 of the focus adjustment jig 500, and the optical engine holding unit 502 is moved by the slide rail 504 to set a target distance for focus adjustment. . Next, the image from the optical engine 50 is projected onto the jig screen 501, and the position of the PJ lens 55 is adjusted in the front-rear direction with respect to the image display element 56. The focus position is adjusted while viewing the image projected on the jig screen 501, and the position is fixed after the adjustment is completed. 11 and 12 show the image light beams 25a, 25b, 25c, 25d, 25e, 25f, 25g, 25h, and 25i output from the optical engine 50 toward the jig screen 501. FIG.

  After the focus adjustment, the position of the image display element 56 is adjusted with respect to the PJ lens 55, and the screen position and distortion are adjusted. Here, it is possible to adjust the position of the image display element 56 with the focus adjustment jig 500, but it is difficult to access the position of the image display element 56, that is, the substrate unit 53. The screen position is adjusted using the screen position adjusting jig 100.

  In the screen position adjusting jig 100, the substrate unit 53 can be installed horizontally. For this reason, the jig screen 20 is installed inclined as shown in FIG. In the focus adjustment, the projection distance is changed according to the target screen size (size marks 505a to 505e) of the jig screen 501, but in the screen position adjustment, if the PJ lens 55 is the same, the projection distance is actually changed. Regardless of the screen size to be used, it is possible to adjust the screen position while keeping the projection distance constant.

  Here, a plurality of marks (marking lines) 21a, 21b, 21c, and 21d are drawn on the jig screen 20, as shown in FIG. 3, so as to match the marks 21a, 21b, 21c, and 21d. Adjust the screen position.

  The optical engine holding unit 10 of the screen position adjusting jig 100 includes an engine housing holding unit 1 and a substrate unit holding unit 2 as shown in FIG. As shown in FIG. 4, the engine housing holding unit 1 holds the engine housing 51, and the board unit holding unit 2 holds the board unit 53. As shown in FIG. 6, the substrate unit holding unit 2 is configured to use the substrate for the holding mechanism 3 that holds the substrate unit 53 and the PJ lens 55 that is held by the engine housing 51 based on the center of the image display element 56. A rotation adjustment mechanism 5 provided to rotate the unit 53 and a biaxial shaft provided to adjust the position of the substrate unit 53 in a plane perpendicular to the rotation axis about which the substrate unit 53 rotates. A stage 6 and a fan 7 for air-cooling the substrate unit 53 are provided. The gripping mechanism 3 has a claw 4a and a claw 4b. The rotation adjustment mechanism 5 includes an adjustment knob 61 that adjusts the rotation angle of the image display element 56. The biaxial stage 6 includes an adjustment knob 63 that adjusts the position of the image display element 56 in the X direction and an adjustment knob 62 that adjusts the position of the image display element 56 in the Y direction.

  Next, a description will be given using a screen position adjustment method. First, as shown in FIGS. 7 and 8, the optical engine 50 with the cover 58 removed is installed on the optical engine holding unit 10 of the screen position adjusting jig 100 (optical engine installation step). 7 and 8 show a state before the substrate unit 53 is attached to the substrate unit holding part 2. FIG. Here, the engine housing 51 is installed in the engine housing holding unit 1 of the optical engine holding unit 10. The engine housing 51 is installed by being fitted in a positioning hole (not shown) on the engine housing holding portion 1 and is fixed in position by a clamper such as a toggle clamp (not shown). Next, the substrate unit 53 has a plurality of substrate units 53 with respect to the engine housing 51 so that the focus performance adjusted by the focus adjustment jig 500 can be maintained and the position can be adjusted with respect to the engine housing 51. Is temporarily fixed with a predetermined temporary torque by a screw inserted into the screw hole 60 (temporary fixing step). 7 and 8, the PJ lens 55 and the light source 52 are omitted.

  As shown in FIGS. 9 and 10, the substrate unit holding unit 2 is moved while maintaining the above state, and the holding mechanism provided on the substrate unit holding unit 2 on the screen position adjusting jig 100 is moved. 3 to hold (substrate unit holding step). At this time, the holding mechanism 3 is moved to the end of the substrate unit 53 using the adjustment knobs 62 and 63 of the biaxial stage 6. 9 and 10 show a state after the substrate unit 53 is attached to the substrate unit holding unit 2. Here, in a state where the substrate unit 53 is gripped, a tilt deviation of the projected image with respect to the marks (marking lines) 21a, 21b, 21c, 21d on the jig screen 20 or a target mark (not shown) is detected. Then, the rotation adjustment mechanism 5 is moved so that the tilt deviation of the projected image is eliminated, and the substrate unit 53, that is, the image display element 56 is rotated in the rotation adjustment direction 66 of FIG. Adjustment process). It is desirable that the rotation axis around which the substrate unit 53 rotates is in the vicinity of the emission center from which the image display element 56 emits toward the PJ lens 55. 9 and 10, the PJ lens 55 and the light source 52 are omitted.

  The substrate unit 53 includes a substrate 57 on which the image display element 56 and other elements are mounted, and a substrate unit cover 59. 7 and 8 show a state in which the substrate unit cover 59 is attached. 9 and 10, the substrate unit cover 59 is omitted so that the image display element 56 can be seen.

  FIG. 3 shows image light rays 25 a, 25 b, 25 c output from the optical engine 50 and a drawing line 26. In the screen tilt adjustment, when the image display element 56 rotates upward in the rotation adjustment direction 66 in FIG. 10, the image projected on the left end side of the jig screen 20 in FIG. 3 rotates counterclockwise. Conversely, when the image display element 56 rotates downward in the rotation adjustment direction 66 in FIG. 10, the image projected on the jig screen 20 in FIG. 3 rotates clockwise.

  Here, when adjusting the screen tilt, the screen is detected at one place where the sensitivity of the tilt is the strictest with respect to the movement of the screen, and the position is aligned with the reference line. Specifically, for example, as shown in FIG. 3, due to the influence of shift projection, an image projected from the upper side of the PJ lens 55 and a lower side of the PJ lens 55 are projected to the center of the PJ lens 55. If the tilt angle of the emitted light differs from the image to be detected, an image from the upper side of the lens having a large projection angle (the lower side when projected onto the jig screen 20 this time) is detected, and the rotation adjusting mechanism 5 is moved. Execute tilt adjustment.

  After the screen tilt adjustment, the screen position is shifted (shift adjustment process). In the shift adjustment process, the biaxial stage 6 is moved and adjusted as in the X translational adjustment direction 64 and the Y translational adjustment direction 65 in FIG. 10, and the center of the projection image comes to the center drawn on the jig screen 20. Adjust the screen position as follows.

  Finally, after adjusting the screen tilt and the screen position in the rotation adjustment step and the shift adjustment step, the board unit 53 is adjusted to a specified torque with respect to the engine housing 51 by screws inserted into the plurality of screw holes 60. To completely fix (final fixing step).

  The rotation adjusting mechanism 5 and the biaxial stage 6 may be either manually operated or automatic.

  The screen position adjustment jig 100 of the projection apparatus according to the first embodiment is a jig that adjusts the screen position of the optical engine 50 in the screen position adjustment process of the optical engine 50. Specifically, the screen position adjustment jig 100 is a PJ of the optical engine 50. This is a jig for aligning the image display element 56 such as DMD of the optical engine 50 with respect to the engine housing 51 on which the lens 55 is mounted. The screen position adjusting jig 100 includes a substrate on which an engine housing holding unit 1 that holds an engine housing 51 on which a PJ lens 55 of the optical engine 50 is mounted, and an image display element 56 such as a DMD of the optical engine 50 is mounted. The optical engine holding part 10 which has the board | substrate unit holding part 2 holding the unit 53, the jig | tool screen 20 which is a screen part which projects a projection image, and the screen stand 27, and the connection part 30 which connects them are provided. The substrate unit holding unit 2 that holds the substrate unit 53 includes a gripping mechanism 3 that grips the substrate unit 53, a rotation adjusting mechanism 5 that rotates around the image display element 56, and the substrate unit 53 in the vertical and horizontal directions (FIG. 10). And a biaxial stage 6 adjustable in the Y direction and the X direction). The screen position adjustment jig 100 adjusts the position of the substrate unit 53 with respect to the engine housing 51 by the rotation adjustment mechanism 5 and the biaxial stage 6 of the substrate unit holding unit 2, thereby adjusting the screen inclination and adjusting the screen position. Since (shift adjustment) can be adjusted independently, the screen position adjustment work of the optical engine 50 can be performed in a short time and with high accuracy.

  The optical engine 50 in which the position of the substrate unit 53 with respect to the engine housing 51 is adjusted is mounted on the projection device. The engine housing 51 is installed by being fitted into a positioning hole (not shown) provided in the optical engine mounting portion of the projection apparatus.

  The screen adjustment method of the projection apparatus according to the present invention includes a focus adjustment step and a screen position adjustment step. In the focus adjustment step, the distance between the optical engine 50 and the jig screen 501 is actually measured using the focus adjustment jig 500. The projection distance is set to a focus distance, and the screen position adjustment jig 100 is used to adjust the focus to the engine housing 51 of the optical engine 50 having a fixed projection distance to the jig screen 20 in the screen position adjustment process. The screen position is adjusted by aligning the position of the image display element 56.

  The screen position adjustment method according to the first embodiment is the screen position adjustment step described above, and the substrate held by the substrate unit holding unit 2 while checking the projection image from the optical engine 50 on the screen (jig screen 20). The image display element 56 of the unit 53 is moved by the rotation adjusting mechanism 5 and the biaxial stage 6 to adjust the screen position.

The screen adjustment method of the projection apparatus according to the present invention is divided into a focus adjustment step and a screen position adjustment step, and in the screen position adjustment step, the screen position of the optical engine 50 using the screen position adjustment jig 100 with a fixed projection distance. By adjusting, the screen position can be adjusted in a short time. Since the screen position of the optical engine 50 mounted on the projection apparatus can be adjusted in a short time, the assembly time including adjustment of the projection apparatus can be shortened. Further, in the screen position adjustment process, the position adjustment is performed by the rotation adjustment mechanism 5 and the biaxial stage 6 of the substrate unit holding unit 2, so that not only the screen tilt adjustment but also the screen position adjustment (shift adjustment) is independent. Therefore, the screen position adjustment operation can be performed with high accuracy and high productivity.

  The screen position adjustment jig 100 according to the first embodiment is a jig that adjusts the positions of the engine casing 51 and the substrate unit 53 in the optical engine 50, and is arranged in two directions with the rotation adjustment mechanism 5 of the substrate unit holding unit 2. By adjusting the position on the stage 6, not only the screen tilt adjustment but also the screen position adjustment (shift adjustment) can be independently adjusted, so that the screen position adjustment work can be performed with high accuracy and high productivity.

  As described above, the screen position adjusting jig 100 according to the first embodiment has the light source 52, the substrate unit 53 to which the image display element 56 is fixed, and the illumination for condensing the light from the light source 52 on the image display element 56. An optical system 54 and a projection optical system including a PJ lens 55 that magnifies and projects the reflected light from the image display element 56 onto the screen, and a light source 52, a substrate unit 53, an illumination optical system 54, and an engine housing that holds the projection optical system 51 is a screen position adjusting jig of a projection device used when adjusting the screen position of an image projected on the screen by the optical engine 50, the optical engine holding unit 10 that holds the optical engine 50, and the optical engine 50 (projection screen 20, screen base 27) that projects the projection image projected by 50, optical engine holding unit 10, and screen unit (jig screen 20, It comprises a connecting portion 30 for connecting the clean table 27) and. The optical engine holding unit 10 of the screen position adjusting jig 100 holds the engine case holding unit 1 that holds the engine case 51 and the substrate unit 53, and adjusts the position of the image display element 56 with respect to the engine case 51. In this case, the screen position of the optical engine 50 mounted on the projection apparatus can be adjusted with high accuracy and in a short time.

  The screen adjustment method of the projection apparatus according to the first embodiment includes a light source 52, a substrate unit 53 to which an image display element 56 is fixed, an illumination optical system 54 that condenses light from the light source 52 on the image display element 56, and A projection optical system including a PJ lens 55 for enlarging and projecting reflected light from the image display element 56 on a screen, a light source 52, a substrate unit 53, an illumination optical system 54, and an engine housing 51 for holding the projection optical system are provided. A screen position adjustment method for a projection apparatus that adjusts the screen position of an image projected on the screen by the optical engine 50, comprising a screen portion (a jig screen 20, a screen stand 27) for projecting a projection image projected by the optical engine 50. The optical engine 5 is attached to the screen position adjusting jig 100 that holds the optical engine 50 and adjusts the position of the image display element 56 with respect to the engine housing 51. An optical engine installation step, a substrate unit holding step of holding the substrate unit 53 in the optical engine 50 installed in the screen position adjustment jig 100, and a screen portion in a state of being held by the screen position adjustment jig 100. A rotation adjustment step of rotating the substrate unit 53 around the image display element 56 and the screen position adjustment jig 100 so as to adjust the inclination of the projection image projected on the (jig screen 20, screen stand 27). The substrate unit 53 is arranged so that the center of the projection image projected on the screen portion (jig screen 20, screen stand 27) is centered on the screen portion (jig screen 20, screen stand 27). Including a shift adjustment step of moving the substrate unit 53 in a plane perpendicular to the rotation axis of the projection device. The screen position adjustment of the optical engine 50 is mounting can be performed with high accuracy in a short time.

Embodiment 2. FIG.
FIG. 13 is a diagram showing a screen position adjusting jig according to the second embodiment of the present invention. The screen position adjusting jig 100 according to the second embodiment is different from the screen position adjusting jig 100 according to the first embodiment in that the screen base 27 for fixing the jig screen 20 and the optical engine holding unit 10 are the base (surface plate) 40. It is different in that it was installed in. The gantry 40 corresponds to the connecting portion 30 of the first embodiment. As described above, even when the screen base 27 for fixing the optical engine holding unit 10 and the jig screen 20 is connected using the gantry 40, the same effect as that of the first embodiment can be obtained.

  It should be noted that the present invention can be combined with each other within the scope of the invention, and each embodiment can be modified or omitted as appropriate.

  DESCRIPTION OF SYMBOLS 1 ... Engine housing holding part, 2 ... Substrate unit holding part, 3 ... Holding mechanism, 5 ... Rotation adjustment mechanism, 6 ... Biaxial stage, 10 ... Optical engine holding part, 20 ... Jig screen, 27 ... Screen stand , 30 ... connecting portion, 50 ... optical engine, 51 ... engine housing, 52 ... light source, 53 ... substrate unit, 54 ... illumination optical system, 55 ... PJ lens, 56 ... image display element, 100 ... screen position adjusting jig .

Claims (3)

A screen position adjustment jig of the projection device used when adjusting the screen position of the image projected on the screen by the optical engine mounted on the projection device,
The optical engine includes a light source, a substrate unit on which an image display element is fixed, an illumination optical system that focuses light from the light source on the image display element, and reflected light from the image display element on the screen. A projection optical system including a PJ lens for enlarging projection, and the engine unit that holds the light source, the substrate unit, the illumination optical system, and the projection optical system,
The screen position adjustment jig includes: an optical engine holding unit that holds the optical engine; a screen unit that projects a projection image projected by the optical engine; and a connecting unit that connects the optical engine holding unit and the screen unit. Prepared,
The optical engine holding unit includes an engine case holding unit that holds the engine case, and a substrate unit holding unit that holds the substrate unit and adjusts the position of the image display element with respect to the engine case. A screen position adjustment jig for a projection apparatus, characterized in that. The substrate unit holding part is
A gripping mechanism for gripping the substrate unit, a rotation adjusting mechanism for rotating the substrate unit around the image display element, and the substrate unit in a plane perpendicular to a rotation axis on which the rotation adjusting mechanism rotates. The screen position adjusting jig of the projection apparatus according to claim 1, further comprising a biaxial stage that moves the projector. A screen position adjustment method for a projection apparatus that adjusts a screen position of an image projected on a screen by an optical engine mounted on the projection apparatus,
The optical engine includes a light source, a substrate unit on which an image display element is fixed, an illumination optical system that focuses light from the light source on the image display element, and reflected light from the image display element on the screen. A projection optical system including a PJ lens for enlarging projection, and the engine unit that holds the light source, the substrate unit, the illumination optical system, and the projection optical system,
The optical engine is installed in a screen position adjustment jig that includes a screen unit that projects a projection image projected by the optical engine, holds the optical engine, and adjusts the position of the image display element with respect to the engine housing. Optical engine installation process,
A substrate unit gripping step of gripping the substrate unit in the optical engine installed in the screen position adjustment jig;
A rotation adjustment step of rotating the substrate unit around the image display element so as to adjust the inclination of the projection image projected on the screen portion while being held by the screen position adjustment jig,
In a plane perpendicular to the rotation axis on which the substrate unit rotates so that the center of the projection image projected on the screen unit is in the center of the screen unit while being held by the screen position adjusting jig. And a shift adjustment step of moving the substrate unit.

Images