JP3339560B2 - Adjustment method of combination projection display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adjusting method for a combination type projection display apparatus comprising a plurality of display units each including a projection unit, a reflector and a screen unit.

[0002]

2. Description of the Related Art In such a combination type projection display device, the brightness of an image displayed on a unit screen (display unit screen) located above the eye level of a viewer is determined by each unit screen. Since the main luminous fluxes are all parallel, the brightness becomes lower than the brightness of the unit screen (the screen of the display unit) located below, deteriorating the image quality.

As a method for dealing with this, Japanese Patent Laid-Open No. Hei 5-3164
As disclosed in Japanese Patent Publication No. 54, among the display units stacked in multiple stages, the projection unit and the screen unit of the display unit located at the upper stage are inclined forward with respect to those of the display unit located at the lower stage. By this, the main light flux of the display unit located at the upper stage is directed downward,
There is known an image display device in which a difference in luminance between upper and lower unit screens is reduced.

[0004]

SUMMARY OF THE INVENTION The above-mentioned Japanese Patent Application Laid-Open No. Hei 5-3
In the prior art disclosed in Japanese Patent No. 16454, the main light flux of the screen (unit screen) of the upper display unit is directed downward, so that the main light flux of the screen of the upper display unit is adjusted to the eye level of the viewer. , Whereby the difference in luminance with respect to the screen of the lower display unit can be reduced. However, the technology disclosed in this prior application can be applied only to those in which the unit screens are mechanically independent and the inclination angle can be changed for each unit screen, and the screens are integrated in the vertical direction. However, there is a problem that it cannot be applied to a combination type projection display device having

[0005] Even if the unit screens are mechanically independent, the depth of the display unit can be shortened by bending the light beam of the image of the projection unit by the reflecting mirror and projecting it on the screen, thereby saving installation space. In a combination type projection display device of a type that achieves space, a heavy projection unit installed vertically is tilted slightly to tilt the main light beam (to change the projection angle). If the projection unit is fixed inside the apparatus, the position of the center of gravity of the heavy projection unit slightly shifts in the mounted state, and there is a problem that it takes a lot of trouble to mount the projection unit at an accurate position. The technique of inclining the unit screen (screen unit) and the projection unit itself as in the technology has been difficult to apply.

Further, even if the unit screens are mechanically independent, if the projection unit is mounted to be inclined, it is necessary to remove the projection unit from the inclined holder when replacing the projection unit. There is such a problem, and when the projection unit is detached, the projection unit becomes inclined and unstable, so that there is a problem in safety, and a problem arises in that workability of replacing the projection unit is poor.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to combine a configuration in which a light beam of an image of a projection unit is bent by a reflecting mirror and projected on a screen to reduce a depth dimension. Easy to adjust the brightness of the upper and lower screens to be almost constant, even in the case of the projection type display device of the type, and even in the case of the combination type projection type display device having the screen integrated in the vertical direction. The object is to realize a reliable adjustment method in a combination type projection display device.

Another object of the present invention is to make it easy to adjust the brightness of the upper and lower screens to be substantially constant, even in the case of a combination projection display apparatus having an integrated screen in the vertical direction. Another object of the present invention is to realize a method of adjusting a combination projection display device in which the projection unit can be easily and safely replaced.

[0009]

Since the present invention SUMMARY OF] is to achieve the above object, the screen unit which is arranged substantially vertically, and a projection unit arranged to illuminate the main beam of a beam of image approximately vertically upwards and a reflecting mirror for projecting the light beam a is reflected (bent) screen unit of the image from the-projecting shooting unit, a display unit comprising, a plurality positioned adjacent vertically and horizontally align the front surface thereof, each of the projection units In the adjusting method of the combination type projection display device, in which the main luminous flux of the light beam of the image from the projection unit is projected substantially at the center of each corresponding screen unit, the image radiated from the projection unit and bent by the reflecting mirror the main beam of the light rays, in a state in which incident substantially vertical <br/> directly against substantially the center of the screen unit, the position and inclination angle of the reflecting mirror, the projection unit On the basis of the position, at least the front part of the reflecting mirror of the display unit located on the upper stage is tilted downward to change its inclination angle, and further, the main luminous flux of the light beam of the image from the projection unit of the display unit is So that the projection unit of the display unit is moved in a substantially horizontal direction in front of the reference position while maintaining its posture so as to pass substantially the center of the screen unit of the display unit, At least the front part of the reflecting mirror of the display unit located on the upper stage is tilted downward to change its inclination angle, and further, the main luminous flux of the image light from the projection unit of the display unit is changed to the screen unit of the display unit. Table so as to pass through the approximate center, the reflecting mirror has varying the tilt angle, while maintaining the posture, or is moved in parallel upward, which is located at least lower Lifting the front reflector unit upward by varying the inclination angle thereof, further, the main beam of a beam of image from the projection unit of the display unit, passes through the approximate center of the screen unit of the display unit In such a manner, the projection unit of the display unit is moved in a substantially horizontal direction rearward from the reference position while maintaining its posture, or at least the front part of the reflection mirror of the display unit located at the lower stage is directed upward. To change the tilt angle, and furthermore, the main luminous flux of the light beam of the image from the projection unit of the display unit is
The reflecting mirror with the variable tilt angle is moved downward in parallel so as to pass through substantially the center of the screen unit of the display unit while maintaining its posture.

Further, the optical path length of the main light beam from the projection unit at the reference position to the approximate center of the screen unit via the reflecting mirror and the adjusted projection unit passing through the reflecting mirror from the projection unit. Then, the projection unit is moved in a substantially vertical direction while maintaining its posture so that the optical path length of the main light beam reaching the approximate center of the screen unit becomes equal.

The tilt angle corresponding to the one-step adjustment amount of the reflecting mirror and the horizontal movement amount corresponding to the one-step adjusting amount of the projection unit, or one of the reflecting mirrors.
The inclination angle corresponding to the step adjustment amount and the parallel movement amount corresponding to the one-step adjustment amount of the reflecting mirror are defined by the relationship that the main luminous flux of the image light beam from the projection unit passes through substantially the center of the screen unit. Set to be satisfied.

[0012] Alternatively, since the present invention to achieve the object described above, substantially perpendicular arranged screen Units -, and a deployed projection unit a main beam of a beam of image substantially as horizontal possible projection display comprising A plurality of units are arranged adjacent to each other vertically and horizontally with their front surfaces aligned, and the main luminous flux of the image light rays from each projection unit is projected substantially at the center of each corresponding screen unit. In the projection display device, the image radiated from the projection unit is based on a state in which the main luminous flux of the light beam of the image radiated from the projection unit is substantially perpendicularly incident on the substantially center of the corresponding screen unit. the main beam of the light rays, while maintaining the state in which incident substantially at the center of the corresponding screen unit are incident on the screen unit of the main beam of a beam of image So they tilt in a plurality of stages up or down direction to adjust the mounting angle of inclination of the projection unit with respect to the horizontal frame deployed in the cabinet stepwise, it is so.

Further, a plurality of engaging portions corresponding to the mounting inclination angles in the above-described steps are provided on the side surface of the projection unit, and using the engaging portion selected from the plurality of engaging portions. , The projection unit and a holding bracket attached to the horizontal frame are connected to each other.

Further, the holding bracket attached to the horizontal frame is attached to a side surface of the projection unit, and a first holding bracket that supports a roller below the first holding bracket, and is separated from the first holding bracket. A second holding fitting attached to the horizontal frame and connected to the horizontal frame, and in a state where the first holding fitting and the second holding fitting are separated from each other, the projection unit holds the first holding fitting. The rollers of the metal fitting allow horizontal movement on the horizontal frame.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of a combination projection display device to which the adjustment methods according to the first to fourth embodiments of the present invention are applied. In the figure, reference numeral 1 denotes a combination type projection display device, in which a plurality of display units are combined to construct a large-screen display device. Each display unit includes a screen unit and a projection unit. It is configured to include a unit and a reflecting mirror.

In FIG. 1, reference numeral 2 denotes a vertically arranged screen unit, 3 denotes a vertically arranged (vertically arranged) projection unit which irradiates the main luminous flux of an image beam vertically upward, and 4 denotes a projection unit 3. A reflecting mirror that reflects (bends) the light beam of the image from the projector onto the screen unit 2, 5 is a horizontal frame fixed to the frame of the display unit, and 6 is a fixing device that fixes the projection unit 3 to the horizontal frame 5. Reference numeral 7 denotes a set screw for fixing the fixing bracket 6 to the horizontal frame 5, and A denotes a main luminous flux of a light beam of an image projected from each projection unit 3.

The combination type projection display device 1 shown in FIG. 1 is constructed by two display units located at a lower stage and two display units located at an upper stage, and each display unit has a front surface. The screen units 2 are combined in a flush manner, for example, so that the entire screen is about 100 inches in size. In this case, the screen unit 2 is independent for each display unit. However, even if the screen is integrated in a vertical or horizontal display unit, the entire screen is integrated. But it doesn't hurt.

In the combination type projection display device 1 shown in FIG. 1, the lower display unit has a projection unit 3
Is fixed at a substantially central position of the horizontal frame 5 using a fixing bracket 6 and a set screw 7, and the reflecting mirror 4 is arranged and fixed above the projection unit 3. Similarly, in the upper display unit, the projection unit 3 is fixed to the position near the rear of the horizontal frame 5 by the fixing bracket 6 and the set screw 7.
, And the reflecting mirror 4 is arranged and fixed above the projection unit 3.

In the state shown in FIG. 1, in each of the lower display unit and the upper display unit, the main luminous flux of the image light emitted upward from the projection unit 3 and bent by the reflecting mirror 4 is projected onto the screen. Unit 2
Incident on the center O at right angles. Further, the optical path length (projection distance) of the main light flux A from the projection unit 3 to the center O of the screen unit 2 via the reflecting mirror 4 in the lower display unit and the reflection from the projection unit 3 in the upper display unit The optical path length of the main light flux A reaching the center O of the screen unit 2 via the mirror 4 is equal.

The adjustment methods according to the first to fourth embodiments of the present invention perform the adjustment based on the position of the projection unit 3 in the state shown in FIG. 1 and the inclination angle and position of the reflecting mirror 4. The adjustment method according to the first to fourth embodiments of the present invention will be described.

FIG. 2 is a diagram showing an adjusting method according to the first embodiment of the present invention. In this embodiment, the main light flux A of the image light emitted from the screen unit 2 of the upper display unit is represented by It is the 1st example in the case of inclining downward. In FIG. 2, reference numeral 3a denotes an emission point of the main light beam A of the projection unit 3.

As shown in FIG. 2A, the reflecting mirror 4 is first tilted about a rotation support shaft (not shown) provided at an appropriate position, and its front part is tilted downward by a predetermined angle (see FIG. 2A). In other words, the reflecting mirror 4 is rotated by a predetermined angle α in the direction of the arrow so as to shift from the solid line position (the position in FIG. 1) to the broken line position. The main luminous flux a of the light beam of the image traveling from the reflecting mirror 4 to the screen unit 2 is inclined downward from the horizontal by a desired angle θ. Here, the angle θ described above is previously selected by study and experimental values on the drawing so that the difference in brightness between the images of the upper and lower screen units 2 is constant when viewed from the viewer at each actual installation site. Value. And this angle θ
, The rotation angle α of the reflecting mirror 4 is calculated in advance, and the reflecting mirror 4 is rotated and adjusted by the angle α. The trapezoidal distortion reflected on the screen due to the inclination of the angle θ is corrected by electrically adjusting the analog convergence (that is, the angle θ is set to a small value within a range in which the trapezoidal distortion can be electrically corrected). ).

Next, as shown in FIG. 2B, the projection unit 3 is moved so that the main luminous flux A of the light beam of the image traveling from the reflecting mirror 4 to the screen unit 2 passes through the center O of the screen unit 2. Is horizontally moved by a predetermined amount Sa in the forward direction while maintaining the posture. That is, the projection unit 3 (the emission point 3a of the main light flux A of the projection unit 3) is
It is horizontally moved by a predetermined amount Sa in the direction of the arrow, whereby
The main beam A is shifted from the position shown by the solid line to the position shown by the broken line,
The main light beam A passes through the center O of the screen unit 2. Here, the horizontal movement amount Sa is also a value determined according to the angle θ and is a value that can be calculated in advance.

As described above, when the angle θ is determined, the rotation angle α of the reflecting mirror 4 and the horizontal movement amount Sa of the projection unit 3 corresponding thereto are also uniquely determined. Therefore, in the present embodiment, the inclination angle corresponding to the one-step adjustment amount of the reflecting mirror 4 and the horizontal movement amount corresponding to the one-step adjustment amount of the projection unit 3 are mainly determined by the main position of the light beam of the image from the projection unit 3. It is set so as to satisfy the relationship that the light flux A passes through the center O of the screen unit 2. That is, when the reflecting mirror 4 is tilted downward by one step (for example, by one scale) by the rotation angle adjusting unit of the reflecting mirror 4, only one step (for example, 1 step) is performed by the horizontal movement adjusting unit of the projection unit 3. When the projection unit 3 is moved forward, the downwardly inclined main luminous flux A passes through the center O of the screen unit 2, and when the reflecting mirror 4 is tilted downward by n steps (for example, only by n graduations), n When the projection unit 3 is moved forward only by steps (for example, only by n scales), the main beam A inclined downward passes through the center O of the screen unit 2.

As described above, by tilting the front part of the reflecting mirror 4 downward to change the angle of inclination of the reflecting mirror 4 and horizontally moving the projection unit 3 forward while maintaining its posture, the upper display unit is displayed. Of the image light emitted from the center O of the screen unit 2 can be inclined downward by the desired angle θ, and the luminance difference between the images of the upper and lower screen units 2 as viewed from the viewer is corrected. You can do it. Moreover, since the projection unit 3 can be moved horizontally while maintaining its posture, that is, while maintaining the upright posture without tilting the heavy projection unit 3, the adjustment is easy and reliable. Furthermore, the inclination angle corresponding to the one-step adjustment amount of the reflecting mirror 4 and the projection unit 3
Since the horizontal movement amount corresponding to the one-step adjustment amount is set so as to satisfy the relationship that the main light flux A of the light beam of the image from the projection unit 3 passes through the center O of the screen unit 2, the adjustment is performed. Can be performed easily and reliably in a short time.

By the way, in the state shown by the solid line in FIG. 2A (state in which the upper display unit is not adjusted), the center O of the screen unit 2 from the projection unit 3 (the emission point 3a) via the reflecting mirror 4 is shown. (In other words, the same optical path length as that of the lower display unit which is not adjusted), and the projection unit 3 (the emission point 3a) in the state shown by the broken line in FIG. 2B. Since the optical path length of the main light flux A reaching the center O of the screen unit 2 via the reflecting mirror 4 is slightly different, a slight difference in brightness occurs between the images of the upper and lower screen units 2. If the correction is made, a higher quality combination type projection display device can be obtained.

Therefore, in the present embodiment, as shown in FIG. 2C, the projection unit 3 passes through the reflecting mirror 4 at the reference position (in the state shown by the solid line in FIG. 2A). Then, the optical path length of the main light flux A reaching the center O of the screen unit 2 is equal to the optical path length of the main light flux A reaching the center O of the screen unit 2 from the projection unit 3 via the reflecting mirror 4 after the adjustment. As described above, the projection unit 3 is moved vertically downward while maintaining its posture. That is, the projection unit 3 is slightly moved downward as indicated by the arrow in FIG. 2C, whereby the sum of L1 and L2 in FIG. 2A and L3 in FIG. And the sum of L4 and L4 (L1 + L2 = L3 + L4).

Next, an adjusting method according to a second embodiment of the present invention will be described. FIG. 3 is a diagram illustrating an adjustment method according to the second embodiment of the present invention. In the present embodiment, the main light flux A of the light beam of the image emitted from the screen unit 2 of the display unit located at the upper stage is inclined downward. Second in case
It is an example.

As shown in FIG. 3 (a), first, the reflecting mirror 4 is rotated about a pivot shaft (not shown) provided at an appropriate position, and its front portion is tilted downward by a predetermined angle (see FIG. 3 (a)). In other words, the reflecting mirror 4 is rotated by a predetermined angle α in the direction of the arrow so as to shift from the solid line position (the position in FIG. 1) to the broken line position. The main luminous flux a of the light beam of the image traveling from the reflecting mirror 4 to the screen unit 2 is inclined downward from the horizontal by a desired angle θ. Here, as described above, the angle θ is an appropriate value that is previously selected based on examinations and experimental values in the drawings for each actual installation site, and the rotation angle of the reflecting mirror 4 according to the angle θ. α is also calculated in advance, and the reflecting mirror 4 is rotated and adjusted by the angle α. The trapezoidal distortion reflected on the screen due to the inclination of the angle θ is corrected by electrically adjusting the analog convergence as described above.

Next, as shown in FIG. 3B, the inclination angle is set so that the main luminous flux A of the light beam of the image traveling from the reflecting mirror 4 to the screen unit 2 passes through the center O of the screen unit 2. The variable reflecting mirror 4 is translated upward by a predetermined amount Ha while maintaining its posture. That is, the reflecting mirror 4 tilted by the angle α as described above is translated in the direction of the arrow by a predetermined amount Ha, thereby shifting the main light beam A from the position shown by the solid line to the position shown by the broken line, and The reflector 4 passes through the center O of the unit 2 (the reflecting mirror 4 may be moved in a diagonally upper right direction, and the reflecting mirror 4 in the present invention is moved in an upward direction while maintaining its posture. Is meant to include an obliquely upward parallel movement). Here, the above-mentioned parallel movement amount Ha is also a value determined according to the angle θ, and is a value that can be calculated in advance.

As described above, when the angle θ is determined, the rotation angle α of the reflecting mirror 4 and the parallel movement amount Ha of the reflecting mirror 4 are uniquely determined. Therefore, in the present embodiment, the tilt angle corresponding to the one-step adjustment amount of the reflecting mirror 4 and the parallel movement amount corresponding to the one-step adjusting amount of the reflecting mirror 4 are determined by determining the main position of the light beam of the image from the projection unit 3. It is set so as to satisfy the relationship that the light flux A passes through the center O of the screen unit 2. That is, only one step (for example, one scale) is performed by the rotation angle adjustment unit of the reflecting mirror 4.
When the reflecting mirror 4 is tilted downward and the reflecting mirror 4 is translated by one step (for example, by one scale) by the parallel movement adjusting unit of the reflecting mirror 4, the downwardly inclined main luminous flux A becomes the screen unit 2. When the reflecting mirror 4 is tilted downward by n steps (for example, only n scales) and only n steps (for example, only n scales)
When the reflecting mirror 4 is moved in parallel, the main light flux A inclined downward passes through the center O of the screen unit 2.

Thereafter, as shown in FIG. 3C, at the reference position (in the state shown by the solid line in FIG. 3A), the projection unit 3 passes through the reflecting mirror 4 to the screen unit 2 at the reference position. And the optical path length of the main light flux A reaching the center O of the screen unit 2 from the projection unit 3 after adjustment via the reflecting mirror 4 to the center O of the screen unit 2 is further equalized. The projection unit 3 is moved vertically upward while maintaining its posture. That is, FIG.
3 (c), the projection unit 3 is moved upward, whereby L1 and L2 in FIG.
Is made equal to the sum of L5 and L6 in FIG. 3C (L1 + L2 = L5 + L6).

Also in this embodiment employing such a technique, the main luminous flux A of the light ray of the image emitted from the center O of the screen unit 2 of the upper display unit can be inclined downward by the desired angle θ. It is possible to correct the luminance difference between the images of the upper and lower screen units 2 as viewed from the viewer. Moreover, when adjustment of the optical path length is not required,
Since adjustment of only the reflecting mirror 4 is sufficient (it is not necessary to adjust the projection unit 3 which is heavy), the adjustment is easier and more reliable than in the first embodiment. Further, the inclination angle corresponding to the one-step adjustment amount of the reflecting mirror 4 and the reflecting mirror 4
The translation amount corresponding to the one-step adjustment amount is set so as to satisfy the relation that the main luminous flux A of the light beam of the image from the projection unit 3 passes through the center O of the screen unit 2. Can be performed easily and reliably in a short time.

Next, an adjusting method according to a third embodiment of the present invention will be described. FIG. 4 is a diagram illustrating an adjustment method according to a third embodiment of the present invention. In the present embodiment, the main luminous flux A of the light beam of the image emitted from the screen unit 2 of the lower display unit is tilted upward. Case first
It is an example.

As shown in FIG. 4 (a), first, the reflecting mirror 4 is lifted up by a predetermined angle by rotating the front portion of the reflecting mirror 4 upward about a rotation support shaft (not shown) provided at an appropriate position. 1), that is, the reflecting mirror 4 is rotated by a predetermined angle β in the direction of the arrow so as to shift from the solid line position (the position in FIG. 1) to the broken line position. The main luminous flux a of the light beam of the image traveling from the reflecting mirror 4 to the screen unit 2 is inclined upward from the horizontal by a desired angle ψ. Here, the above-mentioned angle 予 め is selected in advance by study and experimental values on the drawing such that the difference in brightness between the upper and lower screen units 2 is constant when viewed from a viewer at each actual installation site. Value. The turning angle β of the reflecting mirror 4 corresponding to the angle ψ is calculated in advance, and the turning of the reflecting mirror 4 is adjusted by the angle β.
Note that the trapezoidal distortion reflected on the screen due to the inclination of the angle ψ is
The analog convergence is electrically adjusted and corrected (that is, the angle ψ is selected to be a small value within a range in which the trapezoidal distortion can be corrected electrically).

Next, as shown in FIG. 4B, the projection unit 3 moves so that the main luminous flux A of the light beam of the image traveling from the reflecting mirror 4 to the screen unit 2 passes through the center O of the screen unit 2. Is horizontally moved a predetermined amount Sb backward while maintaining the posture. That is, the projection unit 3 (the emission point 3a of the main light flux A of the projection unit 3) is
It is horizontally moved by a predetermined amount Sb in the direction of the arrow, whereby
The main beam A is shifted from the position shown by the solid line to the position shown by the broken line,
The main light beam A passes through the center O of the screen unit 2. Here, the horizontal movement amount Sb is also a value determined according to the angle ψ, and can be calculated in advance.

As described above, when the angle ψ is determined, the rotation angle β of the reflecting mirror 4 and the horizontal movement amount Sb of the projection unit 3 corresponding thereto are also uniquely determined. Therefore, in the present embodiment, the inclination angle corresponding to the one-step adjustment amount of the reflecting mirror 4 and the horizontal movement amount corresponding to the one-step adjustment amount of the projection unit 3 are mainly determined by the main position of the light beam of the image from the projection unit 3. It is set so as to satisfy the relationship that the light flux A passes through the center O of the screen unit 2. That is, when the reflecting mirror 4 is tilted upward by one step (for example, by one scale) by the rotation angle adjusting unit of the reflecting mirror 4, only one step (for example, 1 step) is performed by the horizontal movement adjusting unit of the projection unit 3. When the projection unit 3 is retracted, the upwardly inclined main beam A passes through the center O of the screen unit 2, and when the reflecting mirror 4 is tilted upward by n steps (for example, by n scales), n When the projection unit 3 is moved backward only by a step (for example, by n scales), the main light flux A inclined upward passes through the center O of the screen unit 2.

Thereafter, as shown in FIG. 4C, at the reference position (in the state shown by the solid line in FIG. 4A), the projection unit 3 passes through the reflecting mirror 4 to the screen unit 2 And the optical path length of the main light flux A reaching the center O of the screen unit 2 from the projection unit 3 after adjustment via the reflecting mirror 4 to the center O of the screen unit 2 is further equalized. The projection unit 3 is moved vertically upward while maintaining its posture. That is, FIG.
3 (c), the projection unit 3 is moved upward, whereby L11 and L11 in FIG.
12 is made equal to the sum of L13 and L14 in FIG. 4C (L11 + L12 = L13 +
L14).

In this embodiment employing such a method, the front portion of the reflecting mirror 4 is lifted upward to change the inclination angle of the reflecting mirror 4, and the projection unit 3 is horizontally moved rearward while maintaining its posture. Thereby, the main luminous flux a of the light ray of the image emitted from the center O of the screen unit 2 of the lower display unit can be inclined upward by the desired angle ψ, and the upper and lower screen units 2 as viewed from the viewer can be seen. Can be corrected. Moreover, since the projection unit 3 can be moved horizontally while maintaining its posture, that is, while maintaining the upright posture without tilting the heavy projection unit 3, the adjustment is easy and reliable. Furthermore, the inclination angle corresponding to the one-step adjustment amount of the reflecting mirror 4 and the horizontal movement amount corresponding to the one-step adjustment amount of the projection unit 3 are determined by changing the main luminous flux of the image light beam from the projection unit 3 to the screen unit. 2 is set so as to satisfy the relationship of passing through the center O, so that the adjustment can be performed easily and reliably in a short time.

Next, an adjusting method according to a fourth embodiment of the present invention will be described. FIG. 5 is a diagram illustrating an adjustment method according to a fourth embodiment of the present invention. In the present embodiment, the main light flux A of a light ray of an image emitted from the screen unit 2 of the lower display unit is tilted upward. Second in case
It is an example.

As shown in FIG. 5 (a), first, the reflecting mirror 4 is lifted by a predetermined angle by rotating the front part of the reflecting mirror 4 upward about a rotation support shaft (not shown) provided at an appropriate position. 1), that is, the reflecting mirror 4 is rotated by a predetermined angle β in the direction of the arrow so as to shift from the solid line position (the position in FIG. 1) to the broken line position. The main luminous flux a of the light beam of the image traveling from the reflecting mirror 4 to the screen unit 2 is inclined upward from the horizontal by a desired angle ψ. Here, the angle ψ is an appropriate value that is previously selected based on a study and an experimental value in the drawing for each actual installation site, as described above, and the reflecting mirror 4 corresponding to the angle ψ
Is calculated in advance, and the reflecting mirror 4 is rotated and adjusted by the angle β. The above angle ψ
The trapezoidal distortion reflected on the screen due to the inclination of is corrected by electrically adjusting the analog convergence in the same manner as described above.

Next, as shown in FIG. 5B, the inclination angle is set so that the main luminous flux A of the image light beam traveling from the reflecting mirror 4 to the screen unit 2 passes through the center O of the screen unit 2. The variable reflecting mirror 4 is translated downward by a predetermined amount Hb while maintaining its posture. That is, the reflecting mirror 4 tilted by the angle β as described above is translated in the direction of the arrow by a predetermined amount Hb, thereby shifting the main light beam A from the position shown by the solid line to the position shown by the broken line, and The mirror 4 is made to pass through the center O of the unit 2 (the reflecting mirror 4 may be moved in a diagonally lower left direction, and the reflecting mirror 4 in the present invention is moved in a downward direction while maintaining its posture. Is meant to include an obliquely downward translation). Here, the translation amount Hb is also a value determined according to the angle ψ, and is a value that can be calculated in advance.

Thereafter, as shown in FIG. 5C, at the reference position (in the state shown by the solid line in FIG. 5A), the projection unit 3 passes through the reflecting mirror 4 to the screen unit 2 And the optical path length of the main light flux A reaching the center O of the screen unit 2 from the projection unit 3 after adjustment via the reflecting mirror 4 to the center O of the screen unit 2 is further equalized. The projection unit 3 is moved vertically downward while maintaining its posture. That is, FIG.
5 (c), the projection unit 3 is moved downward, whereby L11 and L11 in FIG.
12 is made equal to the sum of L15 and L16 in FIG. 5C (L11 + L12 = L15 +
L16).

Also in this embodiment employing such a method, the main luminous flux A of the light ray of the image emitted from the center O of the screen unit 2 of the lower display unit can be inclined upward by the desired angle ψ. It is possible to correct the luminance difference between the images of the upper and lower screen units 2 as viewed from the viewer. Moreover, when adjustment of the optical path length is not required,
Since adjustment of only the reflecting mirror 4 is sufficient (it is not necessary to adjust the projection unit 3 having a large weight), the adjustment becomes easier and more reliable than in the third embodiment. Further, the inclination angle corresponding to the one-step adjustment amount of the reflecting mirror 4 and the reflecting mirror 4
The translation amount corresponding to the one-step adjustment amount is set so as to satisfy the relation that the main luminous flux A of the light beam of the image from the projection unit 3 passes through the center O of the screen unit 2. Can be performed easily and reliably in a short time.

In the first to fourth embodiments, after the adjustment, the reflecting mirror 4 and the projection unit 3 are securely positioned and fixed so as not to be displaced by vibration or slight impact. Needless to say.

FIG. 6 is a cross-sectional view of an example of a combination projection display device after assembly and adjustment according to the present invention.
The example shown in FIG. 6 is an example of application to a case where both the upper and lower display units are installed at a position higher than the viewer's eye level. In the upper and lower display units,
Using the method of the first embodiment or the second embodiment,
The main luminous flux A of the light beam of the image emitted from the center O of the screen unit 2 is adjusted by being inclined downward by the desired angles θ1 and θ2, respectively. Therefore, it is possible to correct the luminance difference between the images of the upper and lower screen units 2 as viewed from the viewer, and to greatly improve the display quality of the entire screen. Note that the angle θ1 and the angle θ2 are
Considering the distance from the viewer, θ1 = θ2 or θ1>
θ2.

FIG. 7 is a cross-sectional view of another example of the combination type projection display device after assembly and adjustment according to the present invention. The example shown in FIG. 7 is an example of application to a case where the viewer's eye height is at an intermediate position between the upper and lower display units. In the upper display unit, the first embodiment or the second embodiment is used. Using the method of the second embodiment, the main luminous flux A of the light ray of the image emitted from the center O of the screen unit 2 is adjusted so as to be inclined downward by the desired angle θ, and the lower display unit performs the third embodiment. By using the method or the method of the fourth embodiment, the main luminous flux A of the light ray of the image emitted from the center O of the screen unit 2 is adjusted so as to be inclined upward by the desired angle ψ. Therefore, it is possible to correct the brightness difference between the images of the upper and lower screen units 2 as viewed from the viewer, and to concentrate the brightness of the images of the upper and lower screen units 2 at the center, thereby giving a sense of realism to the image. Can be caused.

In the above description, an example in which two display units are arranged vertically and horizontally is taken as an example of a combination type projection display device. However, a combination type display device in which a larger number of display units are arranged is used. It goes without saying that the present invention is also applicable to the projection type display device.

FIG. 8 is a sectional view of a combination projection display device to which the adjustment method according to the fifth embodiment of the present invention is applied. In the figure, reference numeral 11 denotes a combination projection display device, and a plurality of display units 12 are combined to construct a large-screen display device. Each display unit 12 is a screen unit. And a projection unit.

In FIG. 8, reference numeral 13 denotes a vertically arranged screen unit, and reference numeral 14 denotes a projection unit, which irradiates a main light flux (b, c, or d) of an image beam horizontally or at a predetermined angle downward from the horizontal. As described above, it is arranged horizontally (horizontally arranged) or its front part is inclined downward by a predetermined angle from the horizontal. Reference numeral 15 denotes a cabinet which forms a frame of each display unit 12. The projection unit 14 is mounted on a horizontal frame 16 fixed to both inner side surfaces of the cabinet 15. Reference numeral 19 denotes a first holding bracket, which is attached to a side surface of the projection unit 14 with a set screw 20 in order to hold the projection unit 14. Reference numeral 18 denotes a second holding member, which is integrally fixed to the horizontal frame 16 and connected to the first holding member 19 by a set screw 20.

17a, 17b and 17c are projection units 1
4, a plurality of screw holes drilled on the side of
The projection unit 14 and the first holding bracket 19 are connected using one of the components a, 17b, and 17c. Here, each screw hole 17a, 17b, 17c is
While maintaining the state where the main luminous flux of the image light beam emitted from the projection unit 14 is incident on the center of the screen unit 13, the angle of incidence of the main luminous flux of the image light beam on the screen unit 13 is reduced. , Or inclined in two steps downward with respect to the vertical line of the screen unit 13. That is, the screw holes 17a, 17b, and 17c have a relationship in which the mounting angle of the projection unit 14 with respect to the horizontal frame 16 is horizontal, or the front part (the emission part) of the projection unit 14 is inclined downward in two stages from horizontal. It has been set.

The number of screw holes on the side of the projection unit 14 and the setting of the amount of adjustment of the mounting angle of the projection unit 14 (the amount of inclination of the incident angle to the screen unit 13) by each screw hole are arbitrary. Each screw hole also allows the main luminous flux of the image light beam emitted from the projection unit 14 to enter the center of the screen unit 13 while maintaining the main luminous flux of the image light beam to the screen unit 13. The incident angle may be set such that the angle of incidence is inclined in a plurality of steps vertically with respect to the screen unit 13 or upward or vertically with respect to a vertical line of the screen unit 13.

Here, the combination type projection display device 11 shown in FIG. 8 has three display units 12 located at the lower stage, three display units 12 located at the middle stage, and three display units 12 located at the upper stage. And a total of nine display units 12, and each display unit 1
Reference numeral 2 denotes a screen unit 13 on the front surface thereof, which is assembled in a flush manner, for example, so that the entire screen is about 130 inches in size. Here,
Although the screen unit 13 is independent for each display unit 12, even if the screen is integrated with a vertical or horizontal display unit or the entire screen is integrated, No problem.

In the lower display unit 12 of the combination type projection display device 11 shown in FIG. 8, the main light flux d of the image light emitted from the projection unit 14 is perpendicular (right angle) to the center of the screen unit 13. Select the screw hole 17a on the side surface of the projection unit 14 so that the light enters
The set screw 20 is screwed into the screw hole 17a
The first holding fixture 19 and the projection unit 14 are integrated with each other. And horizontal frame 1
The projection unit 14 is attached to the horizontal frame 16 by integrally connecting the second holding fitting 18 and the first holding fitting 19 which are integrated with 6 with the set screw 20.

Further, the combination type projection display device 1 shown in FIG.
In the middle display unit 12, the main luminous flux c of the image light emitted from the projection unit 14 is incident on the center of the screen unit 13 and is directed downward by a predetermined angle θ3 with respect to the perpendicular of the screen unit 13. By selecting the screw hole 17b on the side surface of the projection unit 14 so as to incline, the set screw 20 is fastened to the screw hole 17b via the first holding metal 19, so that the first holding metal 1
9 and the projection unit 14 are integrated. Then, the second holding bracket 18 integrated with the horizontal frame 16
And the first holding bracket 19 are integrally connected with a set screw 20 so that the projection unit 14 is connected to the horizontal frame 1.
6 attached.

Further, the combination type projection display device 1 shown in FIG.
In the upper display unit 12, the main luminous flux b of the light beam of the image emitted from the projection unit 14 is incident on the center of the screen unit 13 and is directed downward by a predetermined angle θ4 with respect to the perpendicular of the screen unit 13. By selecting the screw hole 17c on the side surface of the projection unit 14 so as to incline, and fastening the set screw 20 to the screw hole 17c via the first holding metal 19, the first holding metal 1
9 and the projection unit 14 are integrated. Then, the second holding bracket 18 integrated with the horizontal frame 16
And the first holding bracket 19 are integrally connected with a set screw 20 so that the projection unit 14 is connected to the horizontal frame 1.
6 attached.

FIG. 9 is an enlarged view of a portion A in FIG.
FIG. 10 is a sectional view taken along line BB of FIG. 9. This FIG.
The description will be further continued using 0.

As shown in FIGS. 9 and 10, the projection unit 1
4 have three screw holes 17a, 17 at front and rear positions.
b, 17c are formed respectively, and the projection unit 1
The first holding metal fittings 19 are respectively attached to the front and rear sides of the side surface 4. Each first holding bracket 19
Has an L-shaped cross section, and is connected to each of the second holding fittings 18 also having an L-shaped cross section, which are fixed to the horizontal frame 16, by a set screw 20. The first holding metal 19 and the second holding metal 1
8 is configured to be separable.

A roller 22 is pivotally supported below each of the first holding members 19, and the first holding member 19 and the second holding member 19 are connected to each other.
Is in a state where the roller 22 is lifted above the horizontal frame 16 with a predetermined clearance, and the first holding metal 19 and the second holding metal 18 are separated. In this case, the roller 22 is in a state of being grounded on the horizontal frame 16.

In the display unit 12 located at the middle stage shown in FIGS. 9 and 10, the screw holes 17b formed on both side surfaces of the projection unit 14 are used as described above.
The first holding fixture 19 is fixed to both side surfaces of the projection unit 14 with a set screw 20, and the first holding fixture 19 is fixed to the second holding fixture 18 with a set screw 20, so that the projection unit 14 is fixed to the horizontal frame. 16 attached. Thereby, the display unit 12 located in the middle stage
Of the image light emitted from the projection unit 14 is incident on the center of the screen unit 13 and has a predetermined angle θ with respect to a perpendicular to the screen unit 13.
It will be mounted and adjusted so that it is inclined downward by three.

From this state, when taking out the projection unit 14 from the cabinet 15 for maintenance or the like, the set screw 20 connecting the first holding member 19 and the second holding member 18 is removed. Then, the first holding member 19 and the second holding member 18 are separated, and the projection unit 14 and the first holding member 19 are moved together with the roller 22 provided on the first holding member 19 on the horizontal frame 16. By moving it, it is translated and taken out of the cabinet 15. At this time, the projection unit 14
Has its front part inclined downward by a predetermined angle θ3,
Since the horizontal movement is performed on the horizontal frame 16 while maintaining this posture, the movement operation is performed in a stable state, and the projection unit 14 can be easily, easily, and safely moved to the cabinet 15.
Can be taken from The same is true when the projection unit 14 is mounted on the cabinet 15, so that the replacement of the projection unit 14 can be performed simply, easily, and safely.

FIG. 11 is an enlarged view of the projection unit 14 of the lower display unit 12 in the combination projection display device 11 shown in FIG. In the lower display unit 12 shown in FIG. 11, as described above, the first holes are formed on both side surfaces of the projection unit 14 by using the screw holes 17 a formed on both side surfaces of the projection unit 14. The projection unit 14 is attached to the horizontal frame 16 by fixing the holding metal 19 of the first holding metal 19 with the set screw 20 and fixing the first holding metal 19 to the second holding metal 18 with the set screw 20. As a result, the main luminous flux d of the light beam of the image emitted from the projection unit 14 of the display unit 12 located at the lower stage is attached and adjusted such that it enters the center of the screen unit 13 vertically.

From this state, when taking out the projection unit 14 from the cabinet 15 for maintenance or maintenance, the set screw 20 connecting the first holding member 19 and the second holding member 18 is removed. Then, the first holding member 19 and the second holding member 18 are separated, and the projection unit 14 and the first holding member 19 are moved together with the roller 22 provided on the first holding member 19 on the horizontal frame 16. By moving it, it is translated and taken out of the cabinet 15. At this time, the projection unit 14
Is moved horizontally on the horizontal frame 16 while maintaining its horizontal posture, so that the moving operation takes a stable state, and the projection unit 14 can be taken out of the cabinet 15 simply, easily and safely. This is also the same when the projection unit 14 is mounted on the cabinet 15, so that the replacement of the projection unit 14 is simple and easy.
And it can be done safely.

FIG. 12 is an enlarged view of the projection unit 14 of the upper display unit 2 in the combination projection display device 11 shown in FIG. In the upper display unit 12 shown in FIG. 11, the screw holes 1 formed on both side surfaces of the projection unit 14 are provided as described above.
By using 7c, the first holding fitting 19 is fixed to both side surfaces of the projection unit 14 with the set screw 20, and the first holding fitting 19 is fixed to the second holding fitting 18 with the set screw 20, so that the projection is performed. Unit 14 with horizontal frame 1
6 attached. As a result, the main luminous flux b of the image light beam emitted from the projection unit 14 of the display unit 12 located at the upper stage is incident on the center of the screen unit 13 and at a predetermined angle θ4 with respect to the perpendicular of the screen unit 13. It will be attached and adjusted so that it tilts downward.

In this state, when taking out the projection unit 14 from the cabinet 15 for maintenance or maintenance, the set screw 20 connecting the first holding metal 19 and the second holding metal 18 must be removed. Then, the first holding member 19 and the second holding member 18 are separated, and the projection unit 14 and the first holding member 19 are moved together with the roller 22 provided on the first holding member 19 on the horizontal frame 16. By moving it, it is translated and taken out of the cabinet 15. At this time, the projection unit 14
Has its front part inclined downward by a predetermined angle θ4,
Since the horizontal movement is performed on the horizontal frame 16 while maintaining this posture, the movement operation is performed in a stable state, and the projection unit 14 can be easily, easily, and safely moved to the cabinet 15.
Can be taken from The same is true when the projection unit 14 is mounted on the cabinet 15, so that the replacement of the projection unit 14 can be performed simply, easily, and safely.

[0066]

As described above, according to the present invention, a combination type projection display device having a configuration in which a light beam of an image of a projection unit is bent by a reflector and projected on a screen to reduce the depth dimension is provided. Furthermore, even in the case of a combination type projection display device having an integrated screen in the vertical direction,
It is possible to realize an adjustment method in a combination projection display device in which adjustment for making the brightness of the upper and lower screens substantially constant is easy and reliable. Further, in the installed state, the direction of the light beam of the image of any display unit can be easily and reliably adjusted.

Further, even in the case of a combination type projection display device having an integrated screen in the vertical direction, adjustment for making the brightness of the upper and lower screens substantially constant (adjustment of the inclination of the main luminous flux of the image light rays). ) Is easy, and the projection unit can be easily replaced, and a safe adjustment method of the combination projection display device can be realized.

[Brief description of the drawings]

FIG. 1 is a simplified cross-sectional side view of a combination projection display device to which an adjustment method according to first to fourth embodiments of the present invention is applied.

FIG. 2 is an explanatory diagram illustrating an adjustment method according to the first embodiment of the present invention.

FIG. 3 is an explanatory diagram illustrating an adjustment method according to a second embodiment of the present invention.

FIG. 4 is an explanatory diagram illustrating an adjustment method according to a third embodiment of the present invention.

FIG. 5 is an explanatory diagram illustrating an adjustment method according to a fourth embodiment of the present invention.

FIG. 6 is a simplified cross-sectional side view of an example of a combination projection display device after assembly adjustment according to the present invention.

FIG. 7 is a simplified cross-sectional side view of another example of the combination projection display device after performing the assembly adjustment according to the present invention.

FIG. 8 is a simplified cross-sectional side view of a combination projection display apparatus to which an adjustment method according to a fifth embodiment of the present invention is applied.

FIG. 9 is an enlarged view of a portion A in FIG. 8;

FIG. 10 is a sectional view taken along line BB of FIG. 8;

11 is an enlarged view of a projection unit of a lower display unit in the combination projection display device shown in FIG. 8;

12 is an enlarged view of a projection unit of an upper display unit in the combination projection type display device shown in FIG.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 Combination type projection display device 2 Screen unit 3 Projection unit 4 Reflector 5 Horizontal frame A Main light flux of image light 11 Combination type projection display device 12 Display unit 13 Screen unit 14 Projection unit 15 Cabinet 16 Horizontal frame 17a , 17b, 17c Screw holes provided on the side of the projection unit 18 Second holding fitting 19 First holding fitting 20 Set screw 22 Roller B, C, D Main luminous flux of image light rays

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takashi Kanbara 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Within the Visual Information Media Division of Hitachi, Ltd. (72) Tadashi Sato 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Hitachi Image Information System Co., Ltd. (56) References JP-A-6-175225 (JP, A) JP-A-5-224296 (JP, A) JP-A-5-300458 (JP, A) JP-A-4- 113789 (JP, A) JP-A-8-32907 (JP, A) JP-A-9-265132 (JP, A) JP-A-7-209757 (JP, A ) Patent flat 5-313249 (JP, A) Akira real public 40-36224 (JP, Y1) (58 ) investigated the field (Int.Cl. ^7, DB name) G03B 21/10 G09F 9/00 G09F 9 / 40 H04N 5/74

Claims (16)

(57) [Claims] 1. A screen unit arranged substantially vertically, a projection unit arranged so as to irradiate a main light beam of an image light beam substantially vertically upward, and said screen unit reflecting an image light beam from said projection unit. and a reflecting mirror for projecting the unit, the display unit including the screen Yoo
Plurality adjacent arranged vertically and horizontally align the front knit, the main beam of a beam of image from each of said projection unit, the corresponding combination-type comprising so as to be projected substantially at the center of the screen unit of each Adjusting the projection display
A law of reflection by the reflecting mirror is irradiated from the projection unit
The main beam of rays of an image is, the in state is incident substantially perpendicular to the center of the screen unit, the inclination angle and position of the <br/> reflector, based on the position of the projection unit the front portion of the reflector of the display unit located on stage tilt down to vary the inclination angle thereof, the main beam of a beam of image from the projection unit of the display unit, the display unit so as to pass through substantially the center of the screen unit, substantially the projection unit, while maintaining its attitude, from a forward position of the reference
A method of adjusting a combination projection display device, wherein the method is moved in a horizontal direction . 2. The optical system according to claim 1, wherein an optical path length of the main light beam from the projection unit at the reference position to a substantially center of the screen unit via the reflecting mirror and the adjusted projection unit are determined. Further, the projection unit is moved in a substantially vertical direction while maintaining its posture so that the optical path length of the main light beam reaching the approximate center of the screen unit via the reflecting mirror becomes equal. A method for adjusting a combination type projection display device, characterized by moving. 3. The image processing apparatus according to claim 1, wherein an inclination angle corresponding to the one-step adjustment amount of the reflecting mirror and a horizontal movement amount corresponding to the one-step adjustment amount of the projection unit are determined based on an image of the image from the projection unit. A method for adjusting a combination projection display device, wherein the main light flux of a light beam is set so as to satisfy a relationship of passing through a substantially center of the screen unit. 4. A screen unit disposed substantially vertically, a projection unit disposed so as to irradiate a main light beam of an image light beam substantially vertically upward, and said screen unit reflecting an image light beam from said projection unit. and a reflecting mirror for projecting the unit, the display unit including the screen Yoo
Plurality adjacent arranged vertically and horizontally align the front knit, the main beam of a beam of image from each of said projection unit, the corresponding combination-type comprising so as to be projected substantially at the center of the screen unit of each Adjusting the projection display
A law of reflection by the reflecting mirror is irradiated from the projection unit
The main beam of rays of image, the screen unit
In a state that is incident substantially perpendicular to the substantially center, before
Position and the inclination angle of the serial reflector, based on the position of the projection unit, a front portion of the reflector of the display unit located on stage Tilt down to vary the inclination angle thereof, said display unit before the main beam of a beam of image from the projection unit so as to pass through substantially the center of the screen unit of the display unit, which varies the above tilt angle of
A method of adjusting a combination projection display device, wherein the reflecting mirror is translated upward while maintaining its posture. 5. The optical path length of the main light flux from the projection unit at the reference position to the approximate center of the screen unit via the reflecting mirror and the adjusted projection unit at the reference position. Further, the projection unit is moved in a substantially vertical direction while maintaining its posture so that the optical path length of the main light beam reaching the approximate center of the screen unit via the reflecting mirror becomes equal. A method for adjusting a combination type projection display device, characterized by moving. 6. The image processing apparatus according to claim 4, wherein an inclination angle corresponding to the one-step adjustment amount of the reflecting mirror and a parallel movement amount corresponding to the one-step adjusting amount of the reflecting mirror are obtained by converting an image from the projection unit. A method for adjusting a combination projection display device, wherein the main light flux of a light beam is set so as to satisfy a relationship of passing through a substantially center of the screen unit. 7. A screen unit arranged substantially vertically, a projection unit arranged so as to irradiate a main light beam of an image light beam almost vertically upward, and said screen unit reflecting an image light beam from said projection unit. and a reflecting mirror for projecting the unit, the display unit including the screen Yoo
Plurality adjacent arranged vertically and horizontally align the front knit, the main beam of a beam of image from each of said projection unit, the corresponding combination-type comprising so as to be projected substantially at the center of the screen unit of each Adjusting the projection display
A law of reflection by the reflecting mirror is irradiated from the projection unit
The main beam of rays of image, the screen unit
In a state that is incident substantially perpendicular to the substantially center, before
Inclination angle and position of the serial reflector, based on the position of the projection unit, varying the inclination angle thereof by lifting the front portion of the reflector of the display unit located on the lower stage upward, said display unit while the main beam of a beam of image from the projection unit so as to pass through substantially the center of the screen unit of the display unit, the <br/> projection unit of the display unit, and maintained its attitude of, A method of adjusting a combination projection display device, characterized in that the projection display device is moved in a substantially horizontal direction backward from the reference position. 8. The optical system according to claim 7, wherein the optical path length of the main light beam from the projection unit at the reference position to the approximate center of the screen unit via the reflector is adjusted. Further, the projection unit is moved in a substantially vertical direction while maintaining its posture so that the optical path length of the main light beam reaching the approximate center of the screen unit via the reflecting mirror becomes equal. A method for adjusting a combination type projection display device, characterized by moving. 9. The image forming apparatus according to claim 7, wherein an inclination angle corresponding to the one-step adjustment amount of the reflecting mirror and a horizontal movement amount corresponding to the one-step adjustment amount of the projection unit are obtained by converting an image from the projection unit. A method for adjusting a combination projection display device, wherein the main light flux of a light beam is set so as to satisfy a relationship of passing through a substantially center of the screen unit. 10. A screen unit arranged substantially vertically, a projection unit arranged so as to irradiate a main light beam of an image light beam substantially vertically upward, and said screen unit reflecting an image light beam from said projection unit. and a reflecting mirror for projecting the unit, the display unit including the screen Yoo
Plurality adjacent arranged vertically and horizontally align the front knit, the main beam of a beam of image from each of said projection unit, the corresponding combination-type comprising so as to be projected substantially at the center of the screen unit of each Adjusting the projection display
A law of reflection by the reflecting mirror is irradiated from the projection unit
The main beam of rays of image, the screen unit
In a state that is incident substantially perpendicular to the substantially center, before
Inclination angle and position of the serial reflector, based on the position of the projection unit, varying the inclination angle thereof by lifting the front portion of the reflector of the display unit located on the lower stage upward, said display unit before the main beam of a beam of image from the projection unit so as to pass through substantially the center of the screen unit of the display unit, which varies the above tilt angle of
A method of adjusting a combination projection display device, wherein the reflecting mirror is translated downward while maintaining its posture. 11. The optical path length of the main light flux from the projection unit at the reference position to the approximate center of the screen unit via the reflecting mirror at the reference position and the adjusted projection unit. Further, the projection unit is moved in a substantially vertical direction while maintaining its posture so that the optical path length of the main light beam reaching the approximate center of the screen unit via the reflecting mirror becomes equal. A method for adjusting a combination type projection display device, characterized by moving. 12. The image forming apparatus according to claim 10, wherein the tilt angle corresponding to the one-step adjustment amount of the reflecting mirror and the parallel movement amount corresponding to the one-step adjusting amount of the reflecting mirror are used to calculate an image from the projection unit. A method for adjusting a combination projection display device, wherein the main light flux of a light beam is set so as to satisfy a relationship of passing through a substantially center of the screen unit. 13. A screen unit disposed substantially vertically, a projection unit disposed so as to irradiate a main light beam of an image light beam substantially vertically upward, and said screen unit reflecting an image light beam from said projection unit. and a reflecting mirror for projecting the unit, the display unit including the screen Yoo
Plurality adjacent arranged vertically and horizontally align the front knit, each main beam of a beam of image than the projection unit, the corresponding combination-type comprising so as to be projected substantially at the center of the screen unit of each Adjusting the projection display
A law, the display unit located in the upper part, the adjusted adjustment method according to any one of claims 1 to 6, the display unit located on the lower, of the claims 7 to 12 An adjustment method for a combination projection display device, wherein the adjustment is performed by the adjustment method according to any one of the above. 14. A substantially vertically arranged screen Units -, and a deployed projection unit a main beam of a beam of image substantially as horizontal possible projection, a display unit including the
Plurality adjacent arranged vertically and horizontally align the front of the screen unit, the main beam of a beam of image from each of said projection unit, so as to be projected in a substantially <br/> center of the screen unit of the corresponding respective a method of adjusting the combination-type projection type display apparatus comprising Te, the main beam of a beam of image emitted from the projection unit, with respect to substantially the center of the corresponding screen unit
Based on the state in which incident substantially perpendicularly, the main beam of a beam of image emitted from the projection unit, while maintaining a state in which incident on the substantial center of the corresponding screen unit, image light rays wherein the main beam scan <br/> to be inclined in a plurality of stages in the upper or downward angle of incidence to the clean unit, stepwise adjusting the mounting angle of inclination of said projection unit with respect to the horizontal frame deployed cabinet A method of adjusting a combination projection display device, characterized in that the method is performed. 15. The projection unit according to claim 14, wherein a plurality of engagement portions corresponding to the mounting inclination angles at the respective steps are provided on a side surface of the projection unit, and the plurality of engagement portions are selected from the plurality of engagement portions. Using the engagement part,
A method for adjusting a combination projection display device, wherein the projection unit and a holding bracket attached to the horizontal frame are connected to each other. 16. The holding metal fitting attached to the horizontal frame according to claim 15, wherein the holding metal fitting is attached to a side surface of the projection unit and has a roller supported below the first holding metal fitting. And a second holding member attached to the horizontal frame so as to be separable from the holding member and the first holding member.
Wherein the holding unit and the second holding unit are separated from each other, the projection unit can be horizontally moved on the horizontal frame by rollers of the first holding unit. Adjustment method of the projection type display device.