JP2009180756A - Stand screen and rear projection image display system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stand screen for accurately and quickly constructing parallel position relationship of a reflection mirror and a screen sheet by simple adjusting working and quickly obtaining beautiful images without any distortion, and to provide a rear projection image display system. <P>SOLUTION: The rear projection image display system 1 includes: a projector 2 for projecting video light; the reflection mirror 11 for reflecting the video light from the projector 2, and the stand screen 4 for projecting the images by receiving the video light from the reflection mirror 11. The stand screen 4 includes: a light transmission screen sheet 31 for displaying the images on a front side by receiving the video light reflected on the reflection mirror 11 on a rear face side; a screen support frame 32 for supporting the screen sheet 31; and a standing board 42 for making a right angle to the screen sheet 31 in a plan view by facing a board face in right and left directions of the screen sheet 31. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a stand-type screen that receives image light projected from a projector via a reflection mirror and displays an image, and a rear projection-type image display system including the stand-type screen.

  An example of a conventional rear projection type image display system is shown in FIG. A rear projection type image display system 101 shown in FIG. 6 receives a projector 102 that projects image light, a reflection mirror 103 that reflects image light from the projector 102, and image light received from the reflection mirror 103. And a stand-type screen 104 for projecting. Here, the stand-type screen 104 includes a light-transmissive screen sheet 105 that receives the image light reflected by the reflecting mirror 103 on the back side and displays an image on the front side, and a screen support frame that supports the screen sheet 105. 106.

Note that this type of stand-type screen and rear-projection image display system are known, for example, from Patent Document 1.
JP 2006-292908 A

  By the way, in order to obtain a beautiful image without distortion, it is necessary to make the positional relationship between the reflection mirror 103 and the screen sheet 105 parallel in a plan view. In the conventional rear projection type image display system 101, as a parallel position adjustment method for obtaining a parallel positional relationship between the reflection mirror 103 and the screen sheet 105, (a) the reflection mirror is viewed by looking at the condition of the image displayed on the screen sheet 105. The method of adjusting the relative position of the screen sheet 105 with respect to the screen 103, or (b) measuring the distance between the reflective mirror 103 and the screen sheet 105 with a measure and adjusting the relative position of the screen sheet 105 with respect to the reflective mirror 103 based on the measurement result. The method of doing is carried out.

However, since the parallel position adjustment method performed based on the condition of the image displayed on the screen sheet 105 of (a) is an adjustment method that relies on the sense of the person performing the adjustment, the reflection mirror 103 and the screen sheet 105 There is a problem that it is difficult to accurately construct the parallel positional relationship.
On the other hand, in the parallel position adjustment method performed based on the measurement result measured with the measure (b), the parallel position relationship between the reflection mirror 103 and the screen sheet 105 can be accurately constructed, but the measure is used. This requires a lot of trouble and time because of the measurement work.

  The present invention has been made to solve such a problem, and the parallel positional relationship between the reflection mirror and the screen sheet can be accurately and quickly constructed by a simple adjustment operation. It is an object of the present invention to provide a stand type screen and a rear projection type image display system capable of quickly obtaining an image.

In order to achieve the above object, a stand-type screen according to the first invention comprises:
In a stand-type screen that receives image light projected from a projector through a reflection mirror and displays an image,
A light transmissive screen sheet that receives image light reflected by the reflecting mirror on the back side and displays an image on the front side, a screen support frame that supports the screen sheet, and a plate surface in the left-right direction of the screen sheet And a positioning plate that forms a right angle with the screen sheet in plan view.

  In the first invention, a projector installation plate for installing the projector is attached to the screen support frame, and a screen sheet center position mark indicating a horizontal center position of the screen sheet is provided on the projector installation plate. It is preferable to attach (2nd invention).

Next, a rear projection type image display system according to the third aspect of the present invention is provided.
In a rear projection type image display system comprising a projector that projects image light, a reflection mirror that reflects image light from the projector, and a stand-type screen that receives the image light from the reflection mirror and projects an image.
The stand type screen includes a light transmissive screen sheet that receives image light reflected by the reflecting mirror on the back side and displays an image on the front side, a screen support frame that supports the screen sheet, and the screen sheet. The screen sheet faces in the left-right direction, and includes a positioning plate member that forms a right angle with the screen sheet in plan view.

  In the third aspect of the invention, the positioning plate is disposed at a position spaced a predetermined distance to the left or right from the center position in the left-right direction of the screen sheet, and a mirror frame that surrounds the reflection mirror has a left-right direction of the reflection mirror. It is preferable that a positioning mark indicating a position separated from the center position by the same distance as the predetermined distance is provided on the left side or the right side (fourth invention).

  In the first and third inventions, when the reflection mirror and the screen sheet are not in a parallel positional relationship in a plan view, the reflection mirror is viewed from the front side of the screen sheet through the line of sight to the position in the left-right direction of the positioning plate. The left or right plate surface of the positioning plate is projected on the reflection mirror. On the other hand, when the reflection mirror and the screen sheet are in a parallel positional relationship in plan view, when the reflection mirror is viewed from the front side of the screen sheet to the left and right arrangement position of the positioning plate material, Neither plate surface is projected on the reflecting mirror. Therefore, while looking at the reflection mirror through the line of sight from the front side of the screen sheet to the positioning position of the positioning plate material, the relative position of the screen sheet with respect to the reflection mirror so that neither the left or right plate surface of the positioning plate material is reflected on the reflection mirror By a simple adjustment operation such as adjusting the image, the parallel positional relationship between the reflection mirror and the screen sheet can be constructed accurately and quickly, and a beautiful image without distortion can be quickly obtained.

  In addition, by adopting the configuration of the second aspect of the invention, it is possible to more easily perform the positioning operation for positioning the projection optical axis of the projector at the center position in the left-right direction of the screen sheet.

  In addition, by adopting the configuration of the fourth aspect of the invention, it is possible to more easily perform the positioning operation for matching the horizontal center position of the screen sheet with the horizontal center position of the reflecting mirror.

  Next, specific embodiments of the stand type screen and the rear projection type image display system according to the present invention will be described with reference to the drawings.

  FIG. 1 shows an overall external perspective view of a rear projection type image display system according to an embodiment of the present invention. 2 shows a left side view of the rear projection type image display system of this embodiment, and FIG. 3 shows a plan view of the rear projection type image display system.

  A rear projection image display system 1 shown in FIG. 1 includes a projector 2 that projects image light, a reflection mirror device 3 that is installed on the image light projection direction side of the projector 2, and an image that is reflected by the reflection mirror device 3. And a stand-type screen 4 that receives light and displays an image.

  The reflection mirror device 3 includes a reflection mirror 11 that reflects image light from the projector 2 and a mirror support frame 12 that supports the reflection mirror 11 at a predetermined height position.

  The reflection mirror 11 is a rectangular plane mirror and is assembled to the mirror holding frame 13. The mirror holding frame 13 includes a mirror frame 14 that surrounds the reflection mirror 11 and a back plate 15 that supports the reflection mirror 11 from the back side. The mirror holding frame 13 is rotatably attached to the mirror support frame 12 via a pin 16 so that the angle θ (see FIG. 2) formed by the reflection mirror 11 with respect to the horizontal plane can be adjusted. ing.

  Here, the angle θ formed by the reflecting mirror 11 with respect to the horizontal plane is preferably about 90 ° to 95 °, more preferably about 92 °. The reason is that the image light from the projector 2 can be appropriately reflected toward the screen sheet 31 to be described later, and a mirror image M of a standing plate 42 to be described later can be appropriately displayed on the reflection mirror 11. .

  As shown in FIG. 1, the mirror frame 14 is composed of left and right vertical beam members 17 and 18 and upper and lower horizontal beam members 19 and 20 assembled in a square frame shape, and the lower horizontal beam member. Reference numeral 20 denotes a reflection mirror center position mark 21 that indicates the center position of the reflection mirror 11 in the left-right direction, and a positioning mark 22 that indicates a position separated by a predetermined distance D to the left from the center position of the reflection mirror 11 in the left-right direction. Is attached.

  The stand-type screen 4 receives a video light reflected by the reflecting mirror 11 on the back side and displays an image on the front side, and a screen that supports the screen sheet 31 at a predetermined height position. And a support frame 32.

  The screen support frame 32 is disposed on the left and right sides of the screen frame 33 surrounding the screen sheet 31, and the left and right support members 34 and 35 that support the screen frame 33, and the lower ends of the support members 34 and 35. The left and right base members 36 and 37 that are joined and extend in a bar shape in the front-rear direction and the horizontal bar member 38 that connects the left and right support members 34 and 35 at a predetermined height position are configured. Casters (directional small wheels) 39 are attached to the front and rear ends of the base members 36 and 37, respectively. The screen support frame 32 can be smoothly moved by these casters 39, and the stand-type screen 4 can be stored. -Needless to say installation work, it is easier to perform parallel position adjustment work for adjusting the relative position of the screen sheet 31 with respect to the reflection mirror 11 when constructing a parallel position relationship in plan view of the reflection mirror 11 and the screen sheet 31. Can be done.

  On the horizontal bar member 38, a projector installation plate 40 for installing the projector 2 is attached. As shown in FIG. 3, a screen sheet center position mark 41 indicating the center position in the left-right direction of the screen sheet 31 is attached on the projector installation plate 40, and the screen sheet 31 has a center position mark 41. A positioning plate member 42 (hereinafter referred to as “standing plate 42”) is disposed at a position separated by a predetermined distance D toward the left side.

  The upright plate 42 is provided in a standing manner on the projector installation plate 40 so as to face the plate surface in the left-right direction of the screen sheet 31 and form a right angle with the screen sheet 31 in plan view. A base plate 43 is integrally connected to the lower end edge of the upright plate 42 so as to form a right angle with respect to the upright plate 42 and project to the left side. The base plate 43 is fixed by screws or adhesives. The upright plate 42 is fixed to the screen support frame 32 via the projector installation plate 40 by being fixed to the projector installation plate 40. In the present embodiment, as shown in FIGS. 2 and 3, the line of sight S from the front side of the screen sheet 31 to the horizontal position of the upright plate 42 at the height position between the screen frame 33 and the upright plate 42. When the reflection mirror 11 is viewed through, the installation position, installation height dimension, and the like of the upright plate 42 with respect to the projector installation plate 40 are determined so that the mirror image M of the upright plate 42 is reflected on the reflection mirror 11.

  Here, the material of the standing plate 42 is not particularly limited, such as a metal material such as iron or aluminum, wood, or a plastic material. Moreover, it is preferable that the thickness dimension of the standing board 42 is about 1-3 mm. The reason is that the mirror images ML and MR of the left or right plate surface of the upright plate 42 projected on the reflection mirror 11 and the inner peripheral surface of the upright plate 42 projected on the reflection mirror 11 toward the reflection mirror 11. This is because the partial mirror image MF can be clearly distinguished.

  In the rear projection type image display system 1 configured as described above, the reflecting mirror 11 and the screen sheet 31 are not in a parallel positional relationship in plan view, and as shown in FIG. When the screen sheet 31 is inclined such that the right side portion is closer to the reflecting mirror 11 than the portion, and the screen sheet 31 is inclined with respect to the reflecting mirror 11, the horizontal direction of the upright plate 42 from the front side of the screen sheet 31. When the reflecting mirror 11 is viewed through the line of sight S at the arrangement position, a mirror image MR of the right side plate surface of the upright plate 42 is projected on the reflecting mirror 11.

  In addition, the reflection mirror 11 and the screen sheet 31 are not in a parallel positional relationship in plan view, and as shown in FIG. 5, the screen whose left side is closer to the reflection mirror 11 than the right side of the screen sheet 31. When the screen sheet 31 is tilted with respect to the reflection mirror 11 in the left inclined state, when the reflection mirror 11 is viewed through the line of sight S from the front side of the screen sheet 31 to the left-right position of the upright plate 42, the reflection mirror 11 is seen. The mirror image ML of the left side plate surface of the upright plate 42 is projected.

As shown in FIG. 3, when the reflection mirror 11 and the screen sheet 31 are in a parallel positional relationship in plan view, the reflection mirror 11 passes through the line of sight S from the front side of the screen sheet 31 to the horizontal position of the upright plate 42. , The mirror image ML, MR of either the left or right plate surface of the upright plate 42 is not projected on the reflection mirror 11, and the mirror image MF of the rear peripheral surface portion facing the reflection mirror 11 of the upright plate 42. Only is projected.
Accordingly, the screen support frame 32 is appropriately moved from the front side of the screen sheet 31 to the left-right direction arrangement position of the upright plate 42 through the line of sight S while looking at the reflection mirror 11, and the mirror images ML, MR of the left and right plate surfaces of the upright plate 42 The parallel positional relationship between the reflecting mirror 11 and the screen sheet 31 can be constructed accurately and quickly by a simple adjustment operation such as adjusting the relative position of the screen sheet 31 with respect to the reflecting mirror 11 so that it is not reflected on the reflecting mirror 11. Thus, a beautiful image without distortion can be obtained quickly.

  Next, the adjustment work of the optical center position in the plan view among the three of the projector 2, the reflection mirror 11, and the screen sheet 31 will be described.

  First, as shown in FIG. 3, while viewing the reflecting mirror 11 through the line of sight S from the front side of the screen sheet 31 to the left-right direction arrangement position of the standing plate 42, the rear side peripheral surface portion of the standing plate 42 reflected on the reflecting mirror 11. The screen support frame 32 is moved so that the position in the left-right direction of the mirror image MF coincides with the positioning mark 22 attached to the mirror frame 14. Thus, the horizontal center position of the screen sheet 31 and the horizontal center position of the reflecting mirror 11 can be easily matched. The parallel position adjusting operation of the reflecting mirror 11 and the screen sheet 31 described above is performed before or after the positioning operation for matching the center positions of the screen sheet 31 and the reflecting mirror 11 in the left-right direction, or in parallel.

  Next, as shown in FIG. 3, the projector 2 is mounted on the projector 2 so that the center position of the lens portion 2 a of the projector 2 is aligned with the screen sheet center position mark 41 attached to the projector installation plate 40. put on top. Then, the projection optical axis of the projector 2 is adjusted so that the horizontal center position of the image light projected from the projector 2 toward the reflection mirror 11 coincides with the reflection mirror center position mark 21 attached to the mirror frame 14. Perform positioning. In this way, the optical center position in plan view among the three of the projector 2, the reflection mirror 11, and the screen sheet 31 can be easily matched.

  According to the rear projection type image display system 1 of the present embodiment, when not in use, the projector 2, the reflection mirror device 3, and the stand type screen 4 can be housed in different places for effective use of the installation place. In use, the projector 2, the reflection mirror device 3 and the stand-type screen 4 are respectively arranged at predetermined positions, and the above-described parallel position adjustment operation and optical center position adjustment operation are performed, respectively. In addition, the optically appropriate positional relationship of the screen sheet 31 can be constructed accurately and quickly, and a beautiful image without distortion can be obtained quickly.

  Further, in order to obtain a desired image size, adjustment work such as changing the distance between the reflection mirror 11 and the screen sheet 31 is performed. As a result, an optical operation between the projector 2, the reflection mirror 11, and the screen sheet 31 is performed. Even if the proper positional relationship is distorted, the optical proper positional relationship between the three can be quickly reconstructed by performing the parallel position adjusting operation and the optical center position adjusting operation described above. .

  The stand-type screen and the rear projection type image display system of the present invention have been described based on one embodiment. However, the present invention is not limited to the configuration described in the above-described embodiment, and does not depart from the spirit of the present invention. The configuration can be changed as appropriate within the range.

  For example, in the above-described embodiment, the base plate 43 integrally connected at right angles to the standing plate 42 is fixed to the projector installation plate 40 by fixing means such as screws or adhesive. Although an example in which the upright plate 42 is always provided in a standing manner with respect to the projector installation plate 40 has been shown, the present invention is not limited to this, and the upright plate 42 is attached to the projector installation plate 40 via a hinge. A mode in which the standing plate 42 is sometimes raised and the standing plate 42 is laid down when not necessary may be employed.

  Moreover, in the said embodiment, although the example which arrange | positions the standing board 42 in the position separated only predetermined distance D toward the left side of the screen sheet 31 from the screen sheet center position mark 41 was shown, it is limited to this. Instead, a mode in which the upright plate 42 is disposed at a position separated from the screen sheet center position mark 41 by a predetermined distance D toward the right side of the screen sheet 31 may be adopted. In this case, the horizontal beam member 20 on the lower side of the mirror frame 14 is used for positioning indicating a position separated by a predetermined distance D on the right side from the horizontal center position of the reflecting mirror 11 instead of the positioning mark 22. A landmark will be attached.

1 is an overall perspective view of a rear projection type image display system according to an embodiment of the present invention. Left side view of the rear projection type image display system of the present embodiment The top view of the rear projection type image display system of this embodiment FIG. 3 is a plan view of the rear projection type image display system of the present embodiment, and shows a screen right-tilt state. FIG. 3 is a plan view of the rear projection type image display system of the present embodiment, and is a diagram showing a screen tilted left direction Left side view of a conventional rear projection type image display system

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rear projection type image display system 2 Projector 3 Mirror apparatus 4 Stand type screen 11 Reflection mirror 14 Mirror frame 21 Reflection mirror center position mark 22 Positioning mark 31 Screen sheet 32 Screen support frame 40 Projector installation plate 41 Screen sheet center position mark 42 Standing plate (positioning plate)

Claims (4)

In a stand-type screen that receives image light projected from a projector through a reflection mirror and displays an image,
A light transmissive screen sheet that receives image light reflected by the reflecting mirror on the back side and displays an image on the front side, a screen support frame that supports the screen sheet, and a plate surface in the left-right direction of the screen sheet A stand-type screen comprising: a positioning plate member that faces the screen sheet and forms a right angle with the screen sheet in plan view.   A projector installation plate for installing the projector is attached to the screen support frame, and a screen sheet center position mark indicating a horizontal center position of the screen sheet is attached to the projector installation plate. Item 2. The stand type screen according to Item 1. In a rear projection type image display system comprising a projector that projects image light, a reflection mirror that reflects image light from the projector, and a stand-type screen that receives the image light from the reflection mirror and projects an image.
The stand type screen includes a light transmissive screen sheet that receives image light reflected by the reflecting mirror on the back side and displays an image on the front side, a screen support frame that supports the screen sheet, and the screen sheet. A rear projection type image display system comprising: a positioning plate member that faces the plate surface in the left-right direction and forms a right angle with the screen sheet in plan view.   The positioning plate is disposed at a position spaced a predetermined distance from the left-right direction center position of the screen sheet to the left or right side, and the mirror frame surrounding the reflection mirror is arranged on the left side or the left-right direction center position of the reflection mirror. The rear projection type image display system according to claim 3, wherein a positioning mark indicating a position separated from the predetermined distance is provided on the right side.

Images