JP4483284B2 - Image display device manufacturing method, image display device adjustment method, and image display device - Google Patents

Description

  The present invention relates to a method for manufacturing an image display device such as a projector, an adjustment method for the image display device, and an image display device.

  In various image display apparatuses such as projectors, as a method for increasing the resolution of an image, a light beam from an image display light modulation element having a one-dimensional spatial modulation type structure is projected onto an image forming unit while being scanned by an optical scanning unit. A method for forming an image is known (see, for example, Patent Document 1).

  As this one-dimensional spatial modulation type light modulation element, GLV (Grating Light Valve) developed by US Silicon Light Machine (SLM) is known (see, for example, Patent Documents 2 and 3).

  The GLV is composed of a phase reflection type diffraction grating using light diffraction. As an example of the GLV, as shown in FIG. 11, for example, six strip-shaped ribbon elements are constituted by a first surface 30a composed of, for example, three movable ribbons and a second surface 30b composed of a fixed ribbon. These first and second surfaces 30a and 30b are alternately arranged.

  By applying an appropriate voltage between the common electrode 33 on the substrate (not shown) side and the first surface 30a (movable ribbon) to the GLV having such a configuration, the first surface 30a has an appropriate amount of substrate. A diffraction grating for incident light is formed by moving to the side and deforming, that is, by moving relatively.

  The operation of the first surface 30a in this GLV has an advantage that a high-speed switching operation is possible because the width and length are as small as about 25 μm and 200 μm, respectively. In addition, since the reflectivity of diffracted light can be changed in accordance with the display of a wide bandwidth, that is, according to the operating distance of the movable ribbon, and a high degree of modulation with a change in the amount of light can be realized, a low operating voltage and a small image with high resolution. A display device can be provided.

US Pat. No. 5,982,553 US Pat. No. 3,164,824 US Pat. No. 5,941,579

  2. Description of the Related Art Conventionally, an image display device using the above-described GLV type light modulation element has a light modulation element position adjusting means in the image display device, and this position adjustment means is used to adjust an optical system, for example, The positional relationship between the light modulation element and an optical component such as a prism is adjusted.

  However, when there are a plurality of light sources as in an image display device that performs color display, a light modulation element is required for each light source. Therefore, a position adjusting unit is provided in each light modulation element. Therefore, the configuration of the image display apparatus becomes complicated.

  In order to solve the above-described problems, in the present invention, an image display device manufacturing method and an image display device adjustment that can adjust an optical system without providing a position adjusting means in the image display device. The present invention provides an image display apparatus that can adjust the optical system without providing a method and a position adjusting means in the apparatus, and has a simpler configuration than the conventional one.

The image display device manufacturing method of the present invention includes a plurality of light sources including a red laser light source, a green laser light source, and a blue laser light source, and each of the light sources. A one-dimensional spatial modulation type light modulation element that modulates the emitted light, a first reflection surface that is disposed opposite to the light modulation element and reflects incident light to the light modulation element, and from the light modulation element A triangular prism having a second reflecting surface for reflecting the emitted light, a light combining means for combining the emitted light from the light modulation element, and scanning the light combined by the light combining means to project and display a two-dimensional image when manufacturing the image display device and an image display unit which, after placing a plurality of light sources and the optical modulation element and the triangular prism and the light combining means, by generating light from a plurality of light sources, respectively obtained through combining means Each light So as to match the relative positions of the optical image from the one in which a step of adjusting the position of the light modulation element and a triangular prism.

The image display device adjustment method of the present invention includes a plurality of light sources including a red laser light source, a green laser light source, and a blue laser light source, and each of the plurality of light sources. A one-dimensional spatial modulation type light modulation element that modulates the emitted light, a first reflection surface that is disposed opposite to the light modulation element and reflects incident light to the light modulation element, and from the light modulation element A triangular prism having a second reflecting surface for reflecting the emitted light, a light combining means for combining the emitted light from the light modulation element, and scanning the light combined by the light combining means to project and display a two-dimensional image in the image display apparatus and an image display unit which, by generating light from a plurality of light sources, so as to match the relative positions of the optical image from the light sources respectively obtained through combining means, the position of the optical modulator and the triangular prism It is intended to be adjusted.

In the method for manufacturing an image display device and the method for adjusting an image display device according to the present invention, it is also possible to fix the light modulation element and the triangular prism after adjusting the positions of the light modulation element and the triangular prism .
In the image display device manufacturing method and the image display device adjustment method of the present invention, the image display device further includes a fixing member that fixes and integrates the light modulation element and the triangular prism corresponding to each light source. Is also possible.

The image display device of the present invention includes a plurality of light sources including a red laser light source, a green laser light source, and a blue laser light source, and light emitted from each light source. A one-dimensional spatial modulation type light modulation element, a first reflection surface that is disposed opposite to the light modulation element and reflects incident light to the light modulation element, and light emitted from the light modulation element A triangular prism having a second reflecting surface to be reflected, a light modulating element corresponding to each light source and a fixing member for fixing and integrating the triangular prism, a light combining means for combining light emitted from the light modulating element , An image display unit that scans the light combined by the light combining unit and projects and displays a two-dimensional image .

According to the method for manufacturing an image display device of the present invention described above, after arranging a plurality of light sources, light modulation elements, triangular prisms, and light combining means, light is generated from the plurality of light sources and obtained through the light combining means. A mechanism for adjusting the positions of the light modulation element and the triangular prism is provided in the image display device by performing a step of adjusting the positions of the light modulation element and the triangular prism so as to match the relative positions of the optical images from the respective light sources. Even if not, it is possible to adjust the position of the light modulation element and the triangular prism while observing the optical image by using the means for adjusting the position of the light modulation element and the triangular prism provided outside the image display device. become.

According to the adjustment method of the image display device of the present invention described above, the light modulation element and the triangle are arranged so that light is generated from a plurality of light sources and the relative positions of the optical images from the respective light sources obtained through the light combining means are matched. by adjusting the position of the prism, even if not provided with a mechanism for adjusting the position of the light modulation element and the triangular prism to the image display device, the position of the optical modulator and the triangular prism provided on the outside of the image display device Using the adjusting means, it is possible to adjust the positions of the light modulation element and the triangular prism while observing the optical image.

Further, in the adjusting method of the production method and the image display device of the image display device of the present invention, after adjusting the position of the optical modulation element and a triangular prism, when so as to fix the optical modulation element and the triangular prism, the position The positional relationship between the adjusted light modulation element and the triangular prism is maintained without deviation.
Further, when the image display device further includes a fixing member that fixes and integrates the light modulation element corresponding to each light source and the triangular prism , the light modulation element and the triangle are formed in comparison with the structure in which these are separate components. Adjustment of the relative position of the prism can be simplified.

According to the configuration of the image display device of the present invention described above, the light modulation elements and the triangular prisms are arranged between the respective light sources and the light combining means, and the light modulation elements and the triangular prisms corresponding to the respective light sources are fixed. By including a fixing member that is integrated with each other, the position adjustment can be simplified as compared with a configuration in which these are separate parts.
Further, it is possible to adjust the positions of the light modulation element and the triangular prism by using means for adjusting the positions of the light modulation element and the triangular prism provided outside the image display device.

According to the manufacturing method of the image display device of the present invention and the adjustment method of the image display device of the present invention described above, the optical modulation element provided outside the image display device and the means for adjusting the position of the triangular prism are used for optical Since it is possible to adjust the positions of the light modulation element and the triangular prism while observing the image, it is not necessary to provide a position adjustment mechanism for the light modulation element and the triangular prism in the image display apparatus.
As a result, the configuration of the image display device can be simplified, and the arrangement of the light modulation element and the triangular prism can be made compatible in each image display device manufactured and adjusted. .

According to the configuration of the image display device of the present invention described above, the adjustment of the light modulation element and the triangular prism can be simplified. Therefore, when manufacturing the image display device, for example, the positions of the light modulation element and the triangular prism are set. After the adjustment, the light modulation element and the triangular prism and the light combining unit are assembled and integrated, and the adjusted integrated component is incorporated in the image display device, thereby easily arranging the arrangement of the light modulation element and the triangular prism and The image display device can be assembled.
In addition, since it is possible to adjust the positions of the light modulation element and the triangular prism using means for adjusting the positions of the light modulation element and the triangular prism provided outside the image display device, this makes it possible to By omitting the position adjusting mechanism of the light modulation element and the triangular prism in the image display device, the configuration of the image display device can be simplified, and an image display device having a simpler configuration than before can be obtained.

First, FIG. 1 shows a schematic configuration diagram (perspective view) of an embodiment of an image display device to which the present invention is applied.
This image display device uses an L-shaped prism as a color composition mechanism for synthesizing light emitted from a plurality of light sources.
The component shown in FIG. 1 is a portion called an optical engine of the image display device, and includes light sources 1R, 1G, and 1B including, for example, a red laser light source, a green laser light source, and a blue laser light source including a beam shaping unit. Yes.

  Corresponding to the light sources of these colors, a one-dimensional spatial modulation type light modulation element, for example, a light modulation element made of GLV or the like for performing light modulation by changing the diffraction grating structure by relative movement of the first surface and the second surface 3R, 3G and 3B are arranged.

  The triangular prisms 2R, 2G, and 2B are connected to the light modulation elements 3R, 3G, and 3B so that the shaped illumination light is incident on the light modulation elements 3R, 3G, and 3B and the modulated light is guided to the L-shaped prism 5. It is arranged to face the 3R, 3G and 3B modulated light incident / exit surfaces.

A cross-sectional configuration of the triangular prism 2 (2R, 2G, and 2B) in FIG. 1 is schematically shown in FIG.
In this image display device, as shown in FIG. 2, the two surfaces sandwiching the apex angle of the cross-sectional triangle are the first and second reflecting surfaces 2a and 2b, and the apex angle is determined by incident light indicated by an arrow L, for example. Reflected by the first reflecting surface 2a and incident on the light modulation surface of the light modulation element 3, for example, modulated light, which is diffracted light, is emitted at an angle θ as indicated by an arrow L ′ in this incident direction. Then, the light is reflected by the second reflecting surface 2b so that the modulated light is emitted in the same direction as the incident direction of the light from the light source. In FIG. 2, a perpendicular line from the apex angle of the triangular prism 2 to the surface of the light modulation element 3 is indicated by an alternate long and short dash line c.

  For example, when the above-mentioned GLV is used as the light modulation element 3, the angle θ formed by the incident light and the reflected diffracted light is relatively small, for example, about 12 °. The incident angle of light and the outgoing angle after light modulation can be adjusted.

On the other hand, the L-shaped prism 5 provided as the color synthesizing mechanism 4 has two wavelength selection film surfaces 5a and 5b. In this case, one wavelength selection film surface 5a is at an extended position in the light emission direction of the light source 1B. For example, it transmits green light and reflects blue light.
The other wavelength selection film surface 5b reflects red light and transmits green light and blue light.

  The light synthesized in the color synthesizing mechanism 4 is collected by the Offner primary mirror 9 and the secondary mirror 10, and the direction is adjusted by the folding mirror 11 to form a one-dimensional intermediate image. This one-dimensional intermediate image is enlarged and projected by the projection lens 12, scanned by a galvano 13 and a galvano mirror 14 provided almost at the position of the pupil of the projection lens, and reflected by a folding mirror 15 for adjusting the projection direction. Project a dimensional image. The L-shaped prism 5 and the triangular prisms 2R, 2G, and 2B are mechanically fixed, and the light modulation elements 3R, 3G, and 3B are also fixed by adjusting their positions, whereby the color composition mechanism 4 is configured. The

  As described above, when a diffraction grating type element such as GLV is used as the light modulation element, the angle formed by the illumination light incident and reflected light is assumed to be used in a narrow limited range of about 12 °, for example. However, it is difficult to establish a color composition system in combination with an L-shaped prism as it is, but as described above, by using a triangular prism having two reflection surfaces having appropriate reflection angles, the color composition mechanism 4 Can be simplified, and can be unitized by making the arrangement positions of the illumination optical systems of the respective wavelengths orthogonal, or by using an L-shaped prism as the color synthesizing mechanism 4.

Next, FIG. 3 shows a schematic configuration diagram of another embodiment of the image display device to which the present invention is applied. FIG. 3 is a plan view of a main part of an optical system called an optical engine of the image display apparatus.
In this image display device, as shown in FIG. 3, an L-shaped prism 5 is used as the color synthesizing mechanism 4 as in the embodiment shown in FIG. In addition to the film surfaces 5a and 5b, as shown in a schematic plan view in FIG. 4, for example, a polarization combining surface 5c for red light is provided.
Further, for example, two sets of triangular prisms 2R1 and 2R2 and light modulation elements 3R1 and 3R2 are provided for red light.
Here, assuming that red light incident on the triangular prism 2R1 is P-polarized light and infrared light incident on the triangular prism 2R2 is S-polarized light, the P-polarized light is transmitted through the polarization combining surface 5c and the S-polarized light is converted. If it is selected so as to have a reflecting characteristic, polarization combining can be performed with the same color as shown in FIG.

By adopting such a configuration, the following advantages can be obtained.
For example, in order to improve the color balance by using light having a wavelength with low visibility such as red light that is about twice as high as the output of other wavelengths, the intensity applied to the light modulation element having a wavelength with low visibility Is higher than the light modulation element of other wavelengths, that is, for example, only the red light needs to be doubled in output, and the surface of the light modulation element for red light, for example, the GLV, is used for other wavelengths due to light damage. There is a problem that the light modulation element deteriorates faster than the light modulation element.

  On the other hand, by adopting the above-described configuration, the light output to each light modulation element can be made the same level, and thereby high output of each color light can be achieved without causing variations in light damage resistance. And a high-luminance image display device can be achieved. In the apparatus shown in FIG. 3, a folding mirror 17 is provided in order to guide to the Offner primary mirror 9 in FIG.

According to each form of the image display device shown in FIG. 1 and FIG. 3, the color composition mechanism of the image display device using laser light sources having different wavelengths and one-dimensional spatial modulation elements can be unitized, and the reliability of the product Serviceability such as performance, assembly, and repair can be improved.
Further, since the degree of freedom in the arrangement of the optical system is increased, a layout that can be easily adjusted can be realized.

  Further, by providing the triangular prism 2 for each of the light modulation elements 3, it becomes possible to make the optical system orthogonal, so that the L-shaped prism 5 can be used as a color synthesizing mechanism. Improvement and cost reduction can be achieved.

In the conventional image display device configured to synthesize light from three color light sources using a dichroic mirror, since the dichroic mirrors are each provided with an adjustment mechanism, the image display device is correspondingly larger. .
On the other hand, according to each form of the image display device shown in FIGS. 1 and 3, since the color composition mechanism is unitized using the L-shaped prism 5, a dichroic mirror is used as the color composition mechanism. Compared with the configuration, the image display device can be downsized. In addition, since the arrangement adjustment of the color composition mechanism itself is not necessary, the arrangement adjustment of each optical component can be simplified.

  Subsequently, as an embodiment of the present invention, a case where the manufacturing method of the image display device of the present invention is applied to the image display device having the configuration shown in FIG. 1 will be described.

The present embodiment is characterized by the step of adjusting the position of the light modulation element 3 when manufacturing the image display device shown in FIG.
In this adjustment step, as shown in FIG. 5, components from the light sources 1 </ b> R, 1 </ b> G, and 1 </ b> B to the projection lens 12 are used in the image display device shown in FIG. 1.
In this adjustment step, the galvanometer mirror 14 and the mirror 15 do not need to be used. Accordingly, the galvanometer mirror 14 and the mirror 15 may be attached after the adjustment process.

First, the parts shown in FIG. 5 are temporarily arranged.
Next, illumination light (laser light) is generated from each of the light sources 1R, 1G, and 1B, and a one-dimensional projection image projected from the projection lens 12 is observed. The observation of the one-dimensional projection image may be performed using a member capable of image-displaying the one-dimensional projection image.

  Then, by using a means for adjusting the position of the components of the optical system, for example, the positional relationship between the triangular prism 2 and the light modulation element 3 is adjusted to correspond to the illumination light from each of the light sources 1R, 1G, 1B. Adjustment is made so as to eliminate the deviation of each one-dimensional projection image.

Accordingly, for example, as shown in FIG. 6A, the three-dimensional one-dimensional projection images R, G, and B are shifted in the vertical and horizontal directions, and the one-dimensional projection image has a large height H0 and width W0. As shown, the three-dimensional one-dimensional projected images R, G, and B are adjusted to be in a predetermined state in which the height H1 and the width W1 of the one-dimensional projected image are small. In FIG. 6B, the height H1 of the one-dimensional projection image is reduced by matching the positions of the one-dimensional projection images R, G, and B in the longitudinal direction.
In order to perform the adjustment as described above, a position adjusting means for the parts of the optical system, for example, a jig for adjusting the position of the light modulation element 3 is used.

Here, a perspective view of one embodiment of a jig for adjusting the position of the light modulation element 3 is shown in FIG. 7A.
A jig (position adjusting device) 100 shown in FIG. 7A has a portion 101 that holds the light modulation element 3 fixedly, and a configuration that enables parallel movement and rotation driving indicated by six arrows in the figure. Yes.
As a result, as schematically shown in FIG. 7B, the light modulation element 3 is translated in the X, Y, and Z axial directions with respect to the triangular prism 2, or the X-rotation, It can be rotated around each axis of Y-rotation and Z-rotation.

The position adjusting device 100 shown in FIG. 7A is not provided in the image display device, but is provided in a manufacturing apparatus or a table where the image display device is manufactured. For example, the bottom plate 102 of the position adjusting device 100 may be fixed to a manufacturing apparatus or a table.
Then, the same number of position adjusting devices 100 are provided corresponding to the number of light modulation elements 3 included in the image display device.
This eliminates the need to provide a position adjustment mechanism for the light modulation element 3 in the image display device, thereby simplifying the configuration of the image display device.

Note that the form of the jig for adjusting the position of the light modulation element is not limited to the position adjustment apparatus 100 shown in FIG. 7A, and other configurations are possible.
In any case, it is desirable not to provide a jig in the image display device, but to provide a jig on the outside of the image display device, for example, on the manufacturing apparatus or table where the image display device is manufactured. .

  After adjusting the position as described above so that the one-dimensional projection images are sufficiently matched, each component of the optical system is fixed. As a result, the correct positional relationship of each adjusted component is maintained so that the positional relationship does not shift.

As described above, the one-dimensional projection images R, G, and B from the respective light sources coincide with each other while observing the one-dimensional projection images R, G, and B using a jig provided outside the image display device. As described above, by adjusting the positional relationship of the optical system components, for example, by adjusting the positional relationship of the light modulation element 3 with respect to the triangular prism 2, the optical system components can be provided without providing a position adjusting mechanism in the image display device. It becomes possible to adjust the positional relationship of.
Therefore, it is not necessary to provide a position adjusting mechanism in the image display device, and the configuration of the image display device can be simplified.

  In addition, by adjusting the position of the optical component using a jig provided outside the image display device, if the jig is provided with a reference such as a scale, this jig is used exclusively for adjusting the image display device. It is possible to make the arrangement of optical components compatible in each image display device that is manufactured and adjusted by using the device.

In the description of the embodiment described above, the manufacturing method of the image display device of the present invention is applied to the image display device shown in FIG. 1, but similarly, the adjustment method of the image display device of the present invention is shown in FIG. It is also possible to adjust the product of the image display device (adjustment before shipment of the finished product, adjustment after the start of use, etc.) by applying to the image display device shown in FIG.
Similarly, when the method for adjusting an image display apparatus of the present invention is applied to the image display apparatus shown in FIG. 1, illumination light (laser light) is generated from each of the light sources 1R, 1G, and 1B to produce a projection lens. While observing the one-dimensional projection image projected from 12, the positions of the components of the optical system are adjusted so as to match the one-dimensional projection image.
At this time, if the galvanometer mirror 14 or the mirror 15 cannot be removed, the rotation of the galvanometer mirror 14 is stopped, and the position of the component is adjusted while observing the one-dimensional projection image in a state where the one-dimensional projection image is not scanned. Do.

When adjusting the product of the image display device, since the optical system is once arranged at the time of manufacture, the step of temporarily arranging each component is omitted.
In addition, the configuration of the jig for adjusting the position of the components of the optical system, which is suitable for each case, may differ between the case where the image display device is manufactured and the case where the product of the image display device is adjusted.

In the embodiment described above, the manufacturing method of the image display device of the present invention has been applied to the image display device shown in FIG. 1, but the manufacturing method of the image display device of the present invention and the image display device of the present invention are described. The adjustment method can be similarly applied to the image display device shown in FIG. 3 and can also be applied to image display devices having other configurations.
The method of the present invention can be similarly applied to any image display device having a configuration including a plurality of light sources, a light combining mechanism for combining light from the plurality of light sources, and an optical component between the light sources and the light combining mechanism. It is.
For example, instead of the L-shaped prism 5, an image display device in which a color composition mechanism is configured by a plurality of dichroic mirrors, or an image display device in which the triangular prism 2 is not provided for the light modulation element 3. Even if it exists, by applying the manufacturing method and adjustment method of this invention, illumination light can be generated from a light source and a light modulation element can be adjusted, observing a one-dimensional projection image.

Next, as another embodiment of the present invention, a case where the configuration of the image display device of the present invention is applied to the image display device 4 shown in FIG. 3 will be described.
In the present embodiment, in the image display device 4 shown in FIG. 3, the triangular prisms 2 (2R1, 2R2, 2G, 2B), 3 (3R1, 3R2, 3G, 3B), L-shaped prism shown in FIG. 5 parts are integrated into a unit.

  Specifically, as shown in the plan view of FIG. 8A, the triangular prism 2 (2R1, 2R2, 2G, 2B) and the light modulation element 3 (3R1, 3R2, 3G, 3B) are fixed to the L-shaped prism 5. Thus, the fixing unit 20 is configured. Moreover, the figure which looked at the adhering unit 20 from the arrows 8B and 8C in FIG. 8A is shown in FIGS. 8B and 8C, respectively.

The fixing unit 20 is configured as follows.
The triangular prisms 2 (2R1, 2R2, 2G, 2B) are each attached to a plate-like member on the back surface, and are fixed to the L-shaped prism 5 by the plate-like member. Each of the light modulation elements 3 (3R1, 3R2, 3G, 3B) is formed by fixing a GLV to a plate, and a fixing member 21 is attached to the back surface of the plate. The fixing member 21 is formed by fixing a thick member for fixing the light modulation element 3 to a thin plate (plate) having an opening. A thin plate (fixed plate) 22 is provided opposite to the fixing member 21, and the plate 22 is fixed to the L-shaped prism 5 by other members.
Each of the fixing member 21 and the plate member 22 has claw-like portions 21A and 22A at four end portions. By fixing these claw-like portions 21A and 22A, the two members 21 and 22 are fixed. , And the light modulation element 3 can be fixed to the L-shaped prism 5.

Next, a process of assembling the fixing unit 20 when manufacturing the image display device will be described.
Here, as shown in FIG. 9A, the case where the remaining two light modulation elements 3R2 and 3G are attached after the two light modulation elements 3R1 and 3B of the four light modulation elements 3 are attached will be described as an example. To do.
The two light modulation elements 3R2 and 3G are fixed to the fixing member 21, respectively. In Figure 9A, but illustrates the back side of the light modulation element 3R2, 3G, as shown in FIG. 9B on the front side of the light modulation element 3R2, 3G is, GLV is attached to the plate.
The two light modulation elements 3R2 and 3G are attached to the side on which the corresponding triangular prisms 2R2 and 2G are disposed, as indicated by arrows in FIG. 9A.
Then, the fixing member 21 fixing the light modulation elements 3R2 and 3G is attached to the plate member 22 by bringing the claws 21A and 22A into contact with each other.

At this time, the position of the light modulation elements 3R2 and 3G with respect to the triangular prisms 2R2 and 2G is adjusted using a jig for adjusting the position of the light modulation element 3, for example, the position adjustment apparatus 100 shown in FIG. 7A.
More preferably, as described above, illumination light (laser light) is generated from the light source, and the position of the light modulation elements 3R2 and 3G is adjusted while observing the one-dimensional projection image.

Subsequently, the claw-like portions 21A and 22A of the fixing member 21 and the plate member 22 are fixed in a state where the light modulation elements 3R2 and 3G are adjusted to the correct positions.
Further, as a fixing method of the fixing member 21 and the plate member 22, it is conceivable that the fixing member 21 and the plate material 22 are fixed using an adhesive (for example, an ultraviolet curable adhesive) or solder.

  In this way, the fixing unit 20 can be assembled as shown in the perspective view of FIG.

According to the configuration of the image display device of the present embodiment described above, the fixing unit 20 is configured by integrating the components of the triangular prism 2, the light modulation element 3, and the L-shaped prism 5, whereby the image display device. After adjusting the position of the light modulation element 3 using means such as a jig (position adjusting device) 100 shown in FIG. 7A provided outside, the adjusted fixing unit 20 is assembled into the image display device. Thus, the arrangement of the optical components and the assembly of the image display device can be easily performed.
Note that when the image display device is provided with a member for positioning and fixing the fixing unit 20 and the fixing unit 20 whose relative positions of the components 2, 3, and 5 have been adjusted is incorporated into the image display device, for example, The fixing unit 20 may be positioned and fixed by adjusting the position of the fixing unit 20 in the image display device by observing the optical image described above.

  Further, according to the configuration of the image display device of the present embodiment, it is possible to use means such as the jig (position adjustment device) 100 shown in FIG. 7A provided outside the image display device. Thus, the adjustment on the image display device can be simplified.

  As the light modulation element in each of the above-described embodiments, for example, as described above, for example, 1088 GLV elements each having three movable ribbons and fixed ribbons alternately arranged are arranged on a one-dimensional array. Can do.

In each of the above-described image display apparatuses, three or four light sources and light modulation elements are provided. However, in the present invention, the number of light source and light modulation elements is limited as long as there are a plurality of light source and light modulation elements. Instead, it may be configured to include two or five or more light sources and light modulation elements.
Further, by changing the L-shaped prism to increase the number of mirrors and incident surfaces with respect to the fixing unit 20 having the configuration shown in FIGS. It becomes possible to synthesize light.
Thus, by increasing the number of light sources and light modulation elements, for example, a plurality of light sources can be assigned to each display color.

  The present invention is not limited to the above-described embodiments, and various other configurations can be taken without departing from the gist of the present invention.

It is a schematic block diagram (perspective view) of one form of the image display apparatus to which this invention is applied. It is a figure which shows typically the cross-sectional structure of the triangular prism of FIG. It is a schematic block diagram of the other form of the image display apparatus to which this invention is applied. It is a schematic block diagram of one form of the L-shaped prism of FIG. FIG. 2 is a diagram illustrating a step of adjusting the position of a light modulation element when manufacturing the image display device of FIG. 1 as an embodiment of the manufacturing method of the present invention. A, B It is a figure which shows the change of the one-dimensional projection image by adjustment of the positional relationship of a triangular prism and a light modulation element. It is a perspective view of one form of the jig | tool which performs position adjustment of A light modulation element. B is a diagram schematically showing an aspect of position adjustment by the jig of FIG. 7A. AC is a figure which shows the structure of the adhering unit of the image display apparatus of other embodiment of this invention. A, B It is a figure explaining the process of assembling the adhering unit of FIG. It is a perspective view which shows the state which assembled the adhering unit of FIG. It is a schematic block diagram of the principal part of an example of a light modulation element.

Explanation of symbols

  1R, 1G, 1B Light source, 2R, 2B, 2G Triangular prism, 3R, 3B, 3G Light modulation element, 4 color composition mechanism, 5 L-shaped prism, 9 Offner primary mirror, 10 secondary mirror, 11 mirror, 12 projection lens , 13 Galvano, 14 Galvano mirror, 15, 17 mirror, 20 Fastening unit

Claims (8)

A plurality of light sources including a red laser light source, a green laser light source, and a blue laser light source;
A one-dimensional spatial modulation type light modulation element that is provided for each light source of the plurality of light sources and modulates light emitted from each light source;
A triangular prism disposed opposite to the light modulation element and having a first reflection surface that reflects incident light to the light modulation element and a second reflection surface that reflects light emitted from the light modulation element; ,
Light synthesizing means for synthesizing light emitted from the light modulation element ;
A method of manufacturing an image display device including an image display unit that scans the light combined by the light combining unit and projects and displays a two-dimensional image ;
After arranging the plurality of light sources, the light modulation element and the triangular prism, and the light combining means,
By generating light from the plurality of light sources, so as to match the relative positions of the optical image from the light sources respectively obtained through the light combining means, the image display to perform the step of adjusting the position of the optical modulator and the triangular prism Device manufacturing method. The method for manufacturing an image display device according to claim 1 , wherein after adjusting the positions of the light modulation element and the triangular prism, the light modulation element and the triangular prism are fixed . The method for manufacturing an image display device according to claim 1 , wherein the image display device further includes a fixing member that fixes and integrates the light modulation element and the triangular prism corresponding to each light source . A plurality of light sources including a red laser light source, a green laser light source, and a blue laser light source;
A one-dimensional spatial modulation type light modulation element that is provided for each light source of the plurality of light sources and modulates light emitted from each light source;
A triangular prism disposed opposite to the light modulation element and having a first reflection surface that reflects incident light to the light modulation element and a second reflection surface that reflects light emitted from the light modulation element; ,
Light synthesizing means for synthesizing light emitted from the light modulation element ;
In an image display device including an image display unit that scans the light combined by the light combining unit and projects and displays a two-dimensional image ,
Adjustment of the image display device that adjusts the positions of the light modulation element and the triangular prism so that light is generated from the plurality of light sources and the relative positions of the optical images from the respective light sources obtained through the light combining means are matched. Method. The adjustment method of the image display apparatus according to claim 4 , wherein after adjusting the positions of the light modulation element and the triangular prism, the light modulation element and the triangular prism are fixed . The image display device adjustment method according to claim 4 , wherein the image display device further includes a fixing member that fixes and integrates the light modulation element and the triangular prism corresponding to each light source . A plurality of light sources, including a red laser light source, a green laser light source, and a blue laser light source;
A one-dimensional spatial modulation type light modulation element that is provided for each light source of the plurality of light sources and modulates light emitted from each light source;
A triangular prism disposed opposite to the light modulation element and having a first reflection surface that reflects incident light to the light modulation element and a second reflection surface that reflects light emitted from the light modulation element; ,
A fixing member for fixing and integrating the light modulation element and the triangular prism corresponding to each light source;
Light synthesizing means for synthesizing light emitted from the light modulation element;
And an image display unit that scans the light combined by the light combining unit and projects and displays a two-dimensional image . The image display device according to claim 7, wherein the fixing member corresponding to each of the light sources is further attached to and integrated with the light combining unit.

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