Projection-type image display device

Abstract

A projection image display device according to the present invention comprises: an illumination optical system that generates illumination light by combining, from a light source unit, a first color laser light and a second color laser light; a light modulation unit that generates image light by modulating the illumination light; and a projection optical system that expands and projects the image light. The light source unit is configured so as to minimize the difference between the height of a light source image of the first color laser light and the height of a light source image of the second color laser light. A relay optical system comprises a reflection first aperture that has a variable opening diameter and that is disposed at a first pupil position. The projection optical system comprises an absorption second aperture that has a variable opening diameter and that is disposed at a second pupil position conjugate with the first pupil position.

Description

Technical Field

[0001] The present disclosure relates to a projection type image display device, and more particularly to a configuration that provides high-contrast image light by making laser light from a light source into illumination light with a small spread using a diaphragm.

Background Art

[0002] Due to the progress of solid light source technology, projection type image display devices are being replaced from conventional discharge tube lamps as their light sources to LEDs or lasers that have advantages such as long life, mercury-free, and non-explosive. In particular, although the light output from a single laser is small, since the étendue of the light output is relatively small, a plurality of lasers unitized in an array are used as a light source, and high-output projectors exceeding 5000 lumens have also been commercialized.

[0003] A laser unit in which a large number of lasers are two-dimensionally and densely mounted and housed in a package is common. Also, while the brightness is being realized up to a certain value, there is a demand for increasing the contrast of the projection image for high image quality.

[0004] However, in a projection type image display device, the contrast is inferior to that of a self-luminous device. To improve the contrast, it is necessary to realize illumination with little spread (illumination with a large F value). However, in a conventional light source, when an illumination system with a large F value is introduced for high contrast, among the light from the light source, light with a large spread is excluded, greatly reducing the brightness.

[0005] In addition, although the image display device is small and high-definition, light modulated for each minute pixel interferes with each other and becomes stray light in the projection optical system, which contributes to reducing the contrast. In view of this situation, the following proposals have been made conventionally.

[0006] For example, in Patent Document 1, one aperture means is arranged in either the illumination optical system or the projection optical system, which has a light distribution characteristic different from that of other color lights for at least one of red, green, and blue color lights. When the aperture is stopped down by the aperture means, a change in color balance occurs in the finally obtained image, but this is corrected and maintained by modulating the light source.

[0007] Further, in Patent Document 2, apertures with variable aperture diameters are arranged in the illumination optical system and the projection optical system respectively, and the aperture ratio of the illumination optical system is larger than that of the projection optical system. The aim is to obtain an image with high contrast by this means.

Prior Art Documents

Patent Documents

[0008]

Patent Document 1

Patent Document 2

Summary of the Invention

[0009] In Patent Document 1, the color of the projected image changes with the change of the aperture. Although the color change can be suppressed by changing the light source output, there are cases where the overall color change reaches an unacceptable level, and generally, the brightness distribution in the center and periphery also changes. Thus, only modulating the light source is only a partial improvement.

[0010] In Patent Document 2, contrast can be obtained by providing variable apertures in the illumination optical system and the projection optical system respectively. However, a single xenon tube or mercury lamp is used as the light source, and the brightness is likely to be reduced by the aperture of the illumination optical system.

[0011] An object of the present disclosure is to provide a projection type image display device that suppresses a decrease in brightness, suppresses color change, and improves contrast in a projection type image display device.

[0012] The projection type image display device of the present disclosure includes a light source unit that emits laser light of a first color that is blue and laser light of a second color that is different from blue, and a first color laser light and a second color laser light from the light source unit. An illumination optical system that generates illumination light by combining the laser light of the second color, a light modulation unit that modulates the illumination light from the illumination optical system according to an image signal input from the outside to generate image light, and an image light emitted from the light modulation unit. And a projection optical system that enlarges and projects the image light onto a projection object. The light source unit includes a first light source component that includes a plurality of first laser light emitting elements that are arranged in an array and each emit laser light of a first color, and a second light source component that includes a plurality of second laser light emitting elements that are arranged in an array and each emit laser light of a second color. The area of the light emitting surface of the first light source component is different from the area of the light emitting surface of the second light source component. The illumination optical system includes a relay optical system that guides the illumination light to the light modulation unit. The light source unit further includes an optical system that changes at least one of the height of the light source image of the laser light of the first color and the height of the light source image of the laser light of the second color. The optical system of the light source unit is configured such that the difference between the height of the light source image of the laser light of the first color and the height of the light source image of the laser light of the second color is reduced. The relay optical system includes a reflective first diaphragm having a variable aperture diameter disposed at a first pupil position where the illumination light is focused. The projection optical system includes an absorption type second diaphragm having a variable aperture diameter disposed at a second pupil position that is conjugate to the first pupil position.

[0013] The projection type image display device in the present disclosure can provide a projection type image display device that suppresses a decrease in luminance, suppresses a color change, and improves contrast.

Brief Description of the Drawings

[0014]

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Mode for Carrying Out the Invention

[0015] Hereinafter, embodiments will be described in detail with reference to the drawings as appropriate. However, a more detailed description may be omitted as necessary. For example, a detailed description of well-known matters and a redundant description of substantially the same configuration may be omitted. This is to avoid making the following description unnecessarily redundant and to facilitate the understanding of those skilled in the art.

[0016] Note that the inventors provide the accompanying drawings and the following description in order for those skilled in the art to fully understand the present disclosure, and do not intend to limit the subject matter described in the claims thereby.

[0017] (Embodiment) Hereinafter, embodiments will be described with reference to FIGS. 1 to 12. First, refer to FIG. 1. FIG. 1 is a configuration diagram of the projection type image display device 1 according to Embodiment 1 of the present disclosure.

[0018] [1-1. Configuration] As shown in FIG. 1, the projection type image display device 1 includes a light source unit 10, an illumination optical system 20, a light modulation unit 30, a projection lens unit 138 as a projection optical system, and a control unit 50. The light source unit 10 emits a first color laser beam that is blue, a second color laser beam that is green and different from blue, and a third color laser beam that is red and different from blue and green. The illumination optical system 20 generates illumination light by combining the blue laser beam, the green laser beam, and the red laser beam from the light source unit 10. The light modulation unit 30 modulates the illumination light from the illumination optical system 20 according to an image signal input from the outside to generate image light. The projection lens unit 138 magnifies and projects the image light emitted from the light modulation unit 30 onto a projection object.

[0019] The light source unit 10 includes blue laser units 101a and 101b that emit a blue laser beam (hereinafter referred to as blue light), green laser units 102a and 102b that emit a green laser beam (hereinafter referred to as green light), and red laser units 103a and 103b that emit a red laser beam (hereinafter referred to as red light). The light source unit 10 arranges two laser light units that emit laser light of each color, respectively, and combines the laser light of these colors to obtain white light.

[0020] The light sources of the above-described respective colors of light are arranged in an array in a combination in which a lens is placed on the emission side of the laser light source to obtain parallel light. Among these, since the blue laser has a higher luminous efficiency than other color lights, in order to finally obtain white by combining with other color lights, it can be configured with a combination of a laser light source and a lens having a smaller number of light emitting elements than other color lights. As a result, it is also possible to configure a small-sized package and keep the cost low.

[0021] Refer to Fig. 2. Fig. 2 is a front view showing the light source package, Fig. 2(a) is a front view of the blue laser units 101a and 101b, and Fig. 2(b) is a front view of the green laser units 102a and 102b and the red laser units 103a and 103b, respectively. In the present embodiment, as shown in Fig. 2(a), for blue light, the blue laser units 101a and 101b each having 14 laser light-emitting elements 104a arranged therein, and as shown in Fig. 2(b), for green and red light, the green laser units 102a and 102b each having 20 laser light-emitting elements 105a and 106a arranged therein, respectively, and the red laser units 103a and 103b are arranged. The blue laser units 101a and 101b are each an example of a first light source component and a fourth light source component. The green laser units 102a and 102b are each an example of a second light source component and a fifth light source component. The red laser units 103a and 103b are each an example of a third light source component and a sixth light source component.

[0022] Refer to Figs. 3 and 4. Fig. 3 is a configuration diagram when the red laser unit or the green laser unit is laid out in a planar manner as a comparative example. Fig. 4 is an arrangement diagram of the light beam in the case of Fig. 3. In the laser units of the above respective colored lights, the light-emitting parts are centrally and intensively arranged with respect to the outer shape. As shown in Fig. 3, in the comparative example, the red laser units 103a and 103b are arranged in contact with each other along their respective outer shapes. Similarly, the green laser units 102a and 102b are arranged in contact with each other along their respective outer shapes.

[0023] In practice, in order to avoid interference with the outer shape of the package when arranging them flatly, a greater distance is required between the light-emitting parts. Conventionally, there is a longer distance between each laser unit. In this configuration, as shown in FIG. 4, for example, when described in red, there is a gap of distance D1R between the light beams 103aL and 103bL from the red laser units 103a and 103b. That is, as the light source, the light beam including this distance D1R in the light beams 103aL and 103bL is treated as the red light beam 107R. Similarly for green, there is a gap of distance D1R between the light beams 102aL and 102bL from the green laser units 102a and 102b, and the light beam including this distance D1R in the light beams 102aL and 102bL is treated as the green light beam 107G as the light source.

[0024] On the other hand, in the present embodiment, as shown in FIG. 5, the light beams from the light sources are combined via mirrors. FIG. 5 shows the arrangement of the red and green laser units according to the present disclosure.

[0025] The light beam 103aL from the red laser unit 103a and the light beam 103b from the red laser unit 103b L and are respectively reflected by the mirrors 108a and 108b and combined into one red light beam 109R and emitted from the light source unit 10. The mirrors 108a and 108b are, for example, dichroic mirrors. A thin film that reflects red light is formed in the lower half region of the mirror 108a. The mirror 108b has the same mirror arranged upside down and has the property of reflecting the red light incident on the upper half region. By arranging the mirrors 108a and 108b, the red laser unit 103a and the red laser unit 103b can be arranged such that their outer shapes overlap in front view or side view (see FIG. 6(b)), and the arrangement regions of the respective laser light-emitting elements 106a do not overlap, and the size of the combined one light beam 107R can be reduced. The mirror 108b is an example of a third mirror. The mirror 108a is an example of a sixth mirror.

[0026] Also, the light beam 102aL from the green laser unit 102a and the light beam 102bL from the green laser unit 102b are reflected by the mirrors 110a and 110b, respectively, and then combined into one green light beam 109G and emitted from the light source unit 10 as such. The mirrors 110a and 110b are, for example, partial mirrors having the property of total reflection on one side above and below the reflecting surface. For example, in the mirror 110a, a total reflection surface is formed in the lower half region. The mirror 110b is arranged with the same mirror upside down, and a total reflection surface is formed in the upper half region. By arranging the mirrors 110a and 110b, the green laser unit 102a and the green laser unit 102b can be arranged so that their outer shapes overlap in front view or side view (see Fig. 6(b)), and the arrangement regions of their respective laser light emitting elements 105a do not overlap, and the size of the combined one green light beam 109G can be reduced. The mirror 110b is an example of the second mirror. The mirror 110a is an example of the fifth mirror.

[0027] As a result, the light source light after reflection by each mirror can arrange the light beams from the light source at intervals of a distance D2R that is sufficiently smaller than the distance D1R, as shown in Fig. 6 when viewed from the -Y direction in Fig. 1 of the optical paths reflected by the mirrors 108a and 108b. Fig. 6 is an explanatory diagram for explaining the light beam distribution obtained by the arrangement example according to the present disclosure of the red and green laser units. Fig. 6(a) is a front view showing the light beam distribution obtained by the arrangement example according to the present disclosure of the red and green laser units, and Fig. 6(b) is a side view of the red and green laser units.

[0028] The red light beam 109R formed across this distance D2R includes the red light beam including the distance D1R 107RIt is possible to emit light with the same output using a light beam smaller than [the original]. Therefore, the distance D4R between the center-of-gravity position 103aG of the light beam 103aL from the red laser unit 103a and the center-of-gravity position 103bG of the light beam 103bL from the red laser unit 103b, which are finally emitted from the light source unit 10, is shorter than the distance D3R between the center-of-gravity position 103aF of each light beam 103aL (see Fig. 4) and the center-of-gravity position 103bF of the light beam 103bL, which are formed by arranging the outer shapes of the red laser unit 103a and the red laser unit 103b in contact with each other in the interval direction. Thereby, red light can be converted into a light beam with a high light density. That is, the distance D4R between the center-of-gravity position of the light beam of the red laser light reflected by the mirror 108b and the center-of-gravity position of the light beam of the red laser light reflected by the mirror 108a is shorter than the distance D3R between the center position (center-of-gravity position 103aF) of the red laser unit 103a and the center position (center-of-gravity position 103bF) of the red laser unit 103b when the outer shapes of the red laser unit 103a and the red laser unit 103b are arranged in contact with each other.

[0029] Also, similar to the red light, the green light beam 109G formed with the distance D2R in between can emit light with the same output using a light beam smaller than the green light beam including the distance D1R. Therefore, the distance D4R between the center-of-gravity position 102aF of the light beam 102aL from the green laser unit 102a and the center-of-gravity position 102bG of the light beam 102bL from the green laser unit 102b, which are finally emitted from the light source unit 10, is shorter than the distance D3R between the center-of-gravity position 102aF of each light beam 102aL (see Fig. 4) and the center-of-gravity position 102bF of the light beam 102bL, which are formed by arranging the outer shapes of the green laser unit 102a and the green laser unit 102b in contact with each other in the interval direction. Thereby, green light can also be converted into a light beam with a high light density. That is, the distance D4R between the center-of-gravity position of the light beam of the green laser light reflected by the mirror 110b and the center-of-gravity position of the light beam of the green laser light reflected by the mirror 110a is shorter than the distance D3R between the center position (center-of-gravity position 102aF) of the green laser unit 102a and the center position (center-of-gravity position 102bF) of the green laser unit 102b when the outer shapes of the green laser unit 102a and the green laser unit 102b are arranged in contact with each other.

[0030] As shown in FIG. 5, the green laser units 102a and 102b are, for example, the same size as the red laser units 103a and 103b, and mirrors 110a and 110b having the property of total reflection are arranged on one side above and below the reflecting surface on the same optical path. Therefore, the light reflected by the mirrors 110a and 110b are The light source light beam of green light obtained by passing through the mirrors 108a and 108b, which are red reflection dichroic mirrors, red light beam 109R is superimposed such that to form.

[0031] In the case of blue light and red light, the shapes, sizes, and orientations of the respective laser units are different. However, if the laser units are arranged on the same plane as in the prior art, the distance between the laser units will increase in order to avoid interference between the respective light source packages. Also in the case of blue light, similar to red light and green light, a small blue light beam can be realized by combining with mirrors 111a and 111b having reflection characteristics on only one of the upper and lower sides. Mirror 111b is an example of a first mirror. Mirror 111a is an example of a fourth mirror.

[0032] FIG. 7 is a perspective view showing an arrangement example according to the present disclosure of a blue laser light source. FIG. 8 is an explanatory diagram for explaining the light beam distribution obtained by the arrangement example according to the present disclosure of the blue laser unit. FIG. 8(a) is a front view showing the light beam distribution obtained by the arrangement example according to the present disclosure of the blue laser unit, and FIG. 8(b) is a side view of the blue laser unit. Thus, in FIG. 7, an arrangement example of the blue light source package and the mirror is shown, and in FIG. 8, the light source light beam after synthesis is shown.

[0033] Similar to the red light, the blue light source light beam 112 formed across the distance D6R can emit light with the same output in a light beam smaller than the blue light beam including the light beams 101aL and 101bL from the two blue laser units 101a and 101b arranged with their outer shapes in contact. Therefore, the distance D8R between the centroid position 101aG of the light beam 101aL from the blue laser unit 101a and the centroid position 101bG of the light beam 101bL from the blue laser unit 101b finally emitted from the light source unit 10 is, similar to the red light and the green light, shorter than the distance between the centroid position of each light beam 101aL and the centroid position of the light beam 102bL formed by arranging the outer shapes of the blue laser unit 101a and the blue laser unit 101b in contact with each other in the interval direction. Thereby, even for the blue light, it can be converted into a light beam with a high light density. That is, the distance D8R between the centroid position of the light beam of the blue laser light reflected by the mirror 111b and the centroid position of the light beam of the blue laser light reflected by the mirror 111a is shorter than the distance between the center position of the blue laser unit 101a and the center position of the blue laser unit 101b when the outer shapes of the blue laser unit 101a and the blue laser unit 101b are arranged in contact with each other.

[0034] In addition, in FIGS. 1 and 7, since there is no light transmitted through the mirrors 110a and 111a, a mirror that reflects all normal visible light may be used. For the same reason, the mirrors 110b and 111b may be mirrors that partially reflect all visible light.

[0035] The illumination optical system 20 uses the laser light from the red laser units 103a and 103b and the green laser units 102a and 102b shown in FIG. 5 and the blue laser units 101a and 101b shown in FIG. 7. However, since the red and green light source light beams 109 and the blue light source light beam 112 are different in size, if they are combined as they are, the heights of the respective light rays incident on the condenser lens 114 that condenses on the rod integrator 113 are different. As a result, the red and green laser lights enter the rod integrator 113 at a larger angle than the blue laser light, resulting in an image with stronger red and green in the peripheral portion than in the central portion in the projected image, which causes color unevenness.

[0036] Therefore, in the present embodiment, the light source unit 10 includes a blue afocal optical system 115 for aligning the heights of the light beams of blue, red, and green, and a red and green afocal optical system 116. The blue afocal optical system 115 includes a convex lens 115a and a concave lens 115b. The red and green afocal optical system 116 includes a convex lens 116a and a concave lens 116b. The blue light emitted from the blue afocal optical system 115, and the red light and green light emitted from the red and green afocal optical system 116 are combined by a blue transmission dichroic mirror 117 and incident on the condenser lens 114.

[0037] Refer to FIG. 9. FIG. 9 is an explanatory diagram for explaining the light beam distribution before incidence on the afocal optical system. Here, the height of the light beam (light source image) may be the length in the width direction in the short diameter DS direction of each laser beam constituting the blue laser light beams 101aL and 101bL, or may be the length in the long diameter DL direction. Hereinafter, an example in which the lengths in the width direction of the light beams are aligned will be described. Here, let the width of the light beam incident on the blue afocal optical system 115 be BW1, the width of the light beam emitted after passing through the blue afocal optical system 115 be BW2, and the magnification of the blue afocal optical system 115 be BW2 / BW1. That is, the blue afocal optical system 115 (an example of the first afocal optical system) changes the width BW1 (the height of the light source image of the blue laser light) to the width BW2 (the first height).

[0038] Similarly, let the width of the light beam incident on the afocal optical system 116 for red and green be RGW1, and the width of the light beam emitted through the afocal optical system 116 for red and green be RGW2, and the magnification of the afocal optical system 116 for red and green be set as RGW2 / RGW1. That is, the afocal optical system 116 for red and green (an example of the second afocal optical system) changes the width RGW1 (the height of the light source image of the green laser light) to the width RGW2 (the second height). Also, the afocal optical system 116 for red and green (an example of the second afocal optical system) changes the width RGW1 (the height of the light source image of the red laser light) to the width RGW2 (the second height). Here, the height of the light source of the green laser light emitted through the afocal optical system 116 for red and green is not necessarily the same as the height of the light source of the red laser light emitted through the afocal optical system 116 for red and green, and they may be different. Note that the afocal optical system 115 for blue and the afocal optical system 116 for red and green are examples of the optical system of the light source unit 10.

[0039] Refer to Fig. 10. Fig. 10 is an explanatory diagram for explaining the light beam distribution after the afocal optical system emits light. At this time, when trying to make the height of the light rays incident on the condenser lens 114 the same, BW2 = RGW2. On the other hand, since BW1 < RGW1, the magnifications of the blue afocal optical system 115 and the red and green afocal optical systems 116 are different. In this way, the image widths BW2 of the light beams 101aL and 101bL of the blue laser light and the image width RGW2 of the light beams 102aL, 102bL, 103aL, and 103bL of the green and red laser lights are equal to the image widths BW1 of the light beams 101aL and 101bL and the image widths RGW1 of the light beams 102aL, 102bL, 103aL, and 103bL at the time of their respective emissions. The magnifications of the blue afocal optical system 115 and the red and green afocal optical systems 116 are different. However, the alignment in the width direction here is just an example. Depending on the light quantity distribution of each light source and the overall optical characteristics, it may be adjusted in the major axis DL direction of the laser light, or in both the minor axis DS direction and the major axis DL direction of the laser light, or adjusted so that the blue light beam spreads more than the red and green light beams in the minor axis DS direction of the laser light and the red and green light beams spread more than the blue light beam in the major axis DL direction. As described above, the blue afocal optical system 115 and the red and green afocal optical systems 116 are configured such that the difference between the width BW2 and the width RGW2 becomes small. More specifically, the blue afocal optical system 115 and the red and green afocal optical systems 116 are configured such that the difference between the width BW2 and the width RGW2 is smaller than the difference between the width BW1 and the width RGW1. Here, each of the difference between the width BW2 and the width RGW2 and the difference between the width BW1 and the width RGW1 means the absolute value of the difference.

[0040] In particular, the red and green afocal optical system 116 has a greater reduction rate of the light beam width. When the blue light source is even smaller or when the condenser lens 114 is larger and configured such that BW1 = BW2, the blue afocal optical system 115 is not required, but it can be similarly said that the magnification of the red and green afocal optical system 116 is smaller than this. Fig. 10 is a diagram in which the magnifications of blue light, red light, and green light are superimposed together. In this way, light source unit 10It is provided with an afocal optical system 115 for blue and an afocal optical system 116 for red and green, which have different magnifications.

[0041] Note that the light source unit 10 does not necessarily have to be provided with both the afocal optical system 115 for blue and the afocal optical system 116 for red and green. In one example, the light source unit 10 is provided with the afocal optical system 115 for blue and does not have the afocal optical system 116 for red and green. In this case, since the light source unit 10 does not have the afocal optical system 116 for red and green, the width RGW1 becomes equal to the width RGW2. The afocal optical system 115 for blue is configured such that the difference between the width BW2 and the width RGW2 is smaller than the difference between the width BW1 and the width RGW1. Specifically, the afocal optical system 115 for blue reduces the difference between the width BW2 and the width RGW2 by expanding the width BW1 to the width BW2. In another example, the light source unit 10 does not have the afocal optical system 115 for blue and has the afocal optical system 116 for red and green. In this case, since the light source unit 10 does not have the afocal optical system 115 for blue, the width BW1 becomes equal to the width BW2. The afocal optical system 116 for red and green is configured such that the difference between the width BW2 and the width RGW2 is smaller than the difference between the width BW1 and the width RGW1. Specifically, the afocal optical system 116 for red and green reduces the difference between the width BW2 and the width RGW2 by reducing the width RGW1 to the width RGW2.

[0042] The illumination optical system 20 includes a rod integrator 113 and a relay optical system 121. The relay optical system 121 includes a lens 118, an illumination aperture unit 119, a lens 123, a folding mirror 124, and a field lens 125.

[0043] The light incident on the rod integrator 113 undergoes multiple reflections within the rod integrator 113 and then reaches the illumination aperture unit 119 via the lens 118. The illumination aperture unit 119 is disposed at the position where the light source image is formed by the lens 118 or in its vicinity. This position becomes the first pupil position of the relay optical system 121 that transfers the image from the exit port 113a of the rod integrator 113 onto the image display element.

[0044] The light transmitted through the aperture 122 of the illumination aperture unit 119 passes through the lens 123, is reflected by the folding mirror 124, and then enters the total reflection prism 126 via the field lens 125.

[0045] The light modulation unit 30 includes a total reflection prism 126, a color prism unit 131, and light modulation elements 137R, 137G, and 137B.

[0046] The total reflection prism 126 is formed by fixing the first prism 127 and the second prism 128 while maintaining a slight gap (air gap). The light incident on the total reflection prism 126 is totally reflected by the total reflection surface 129 and then enters the color prism unit 131 via the surface 130.

[0047] This color prism unit 131 is configured by adhesively fixing a first prism 133 having a blue transmission dichroic mirror surface 132 with the property of reflecting blue light, a second prism 135 having a green transmission dichroic mirror surface 134 with the property of reflecting red and blue light, and a third prism 136. However, an air gap is provided between the first prism 133 and the second prism 135 for using total reflection.

[0048] As shown in FIG. 1, the optical modulation elements 137R, 137G, and 137B are arranged so as to face the end faces of the respective prisms. These optical modulation elements are, for example, DMDs in which minute mirrors are two-dimensionally arranged. In accordance with a video signal input from the outside via the control unit 50, the tilting directions of the minute mirrors are controlled in two directions. The reflected light reflected by the minute mirrors at the tilting angle during the ON signal returns to the color prism unit 131 at an incident angle of 0°. The reflected light reflected by the minute mirrors at the tilting angle during the OFF signal enters the color prism unit 131 again at a large angle with respect to the color prism unit 131. The optical modulation element 137B is for blue light modulation, the optical modulation element 137R is for red light modulation, and the optical modulation element 137G is for green light modulation.

[0049] In the white display mode for each pixel by the optical modulation elements 137R, 137G, and 137B, the light returns to the color prism unit 131 again, and after passing through this, it passes through the second prism 128 and the first prism 127 of the total reflection prism 126 and enters the projection lens unit 138.

[0050] A projection aperture unit 139 is arranged at the second pupil position of the projection lens unit 138. The first pupil position where the illumination aperture unit 119 is arranged and the second pupil position where the projection lens unit 138 is arranged are conjugate to each other. The incident light to the projection lens unit 138 passes through the aperture 140 and reaches a screen as a projection object (not shown in the figure). The projection lens unit 138 is detachably fixed to a mount member 142 provided in the housing of the main body of the projection type image display device 1 (not shown in the figure) via its projection lens flange portion 141. The configuration of such a fixing portion can be constituted by a bayonet or the like. In this way, by inputting different signals to the optical modulation elements 137R, 137G, and 137B according to the image signal, color display can be realized on the screen.

[0051] The illumination aperture unit 119 has high-reflection characteristics on its surface and further includes a plurality of blade members having diffusion characteristics. The diffuse reflection of the illumination aperture unit 119 is formed by surface satin finishing or stack pattern processing in which many irregularities are randomly arranged. Thereby, even when receiving strong light, heat generation of the aperture itself can be suppressed, and the reflected light is diffused to condense light at an arbitrary position, suppressing heat generation and burning of other members.

[0052] However, since heat absorption also occurs even in a high-reflection material, materials with excellent thermal conductivity such as aluminum and copper are used for the material to suppress the occurrence of burning and the like. Thus, the illumination aperture unit 119 of the illumination optical system 20 is composed of a plurality of movable blade members made of a material subjected to high heat conduction and high-reflection treatment, and its surface is a diffuse reflection surface. In one example, the plurality of blade members mainly diffusely reflect 70% or more of the light incident on the plurality of blade members. In another example, the plurality of blade members diffusely reflect 80% or more of the light incident on the plurality of blade members.

[0053] These apertures are driven by an actuator connected via a cam under the control from the control unit 50 of the main body 3, and are configured such that the aperture diameter of the aperture 122 of the illumination aperture unit 119 can be arbitrarily set. An example of the specific structure of the illumination aperture unit 119 is shown in FIG. 11. FIG. 11 is a perspective view showing an example of the configuration of the illumination aperture unit 119 and the projection lens unit 138.

[0054] The illumination aperture unit 119 includes a stepping motor 143 as an actuator, a slip clutch 144 on its output shaft, and a connecting gear 145. By connecting to a sector gear 146 extending from an aperture cam (not shown in the figure), the plurality of aperture blades 147 are moved according to the rotation amount of the stepping motor 143, thereby controlling the aperture diameter of the aperture 122. In addition, a front plate 148 made of a high-reflection aluminum material is provided on the incident side. This front plate 148 may also be subjected to light diffusion treatment.

[0055] Similarly, in the projection lens unit 138, the projection aperture unit 139 also has a plurality of aperture blades 147 driven via a cam, and the diameter of the aperture 140 is variable by control from the main body side. Different from the illumination aperture unit 119, the surface treatment of the aperture blades 147 of the projection lens unit 138 is heat-resistant black treatment. This suppresses the generation of stray light within the projection lens unit 138. Thus, the projection aperture unit 139 includes a material subjected to a light absorption treatment and has a plurality of movable aperture blades 147. In one example, the plurality of aperture blades 147 absorb 90% or more of the visible light incident on the plurality of aperture blades 147. In another example, the plurality of aperture blades 147 absorb 95% or more of the visible light incident on the plurality of aperture blades 147. Note that, between the F-number of the illumination optical system 20 determined by the illumination aperture unit 119 and the F-number of the projection lens unit 138 (projection optical system) determined by the projection aperture unit 139, a relationship is always maintained such that the F-number of the illumination optical system 20 is equal to or greater than the F-number of the projection lens unit 138. Thereby, the heat load on the projection aperture unit 139 can be suppressed.

[0056] Illumination optical system F-number ≥ Projection optical system F-number Note that this projection lens unit 138 is of an interchangeable lens system as described above. Therefore, when the projection lens unit 138 is removed from the main body 3 of the projection type image display device 1, or when it is equipped on a main body other than the main body 3 that satisfies the functions of the present disclosure, the aperture diameter of the projection aperture unit 139 is in a first state set to a first aperture diameter PD1. That is, when the projection lens unit 138 is removed from the main body 3 of the projection type image display device 1 and is not controlled from the outside, the aperture diameter of the projection aperture unit 139 is set to the first aperture diameter PD1. When equipped on the main body 3 that satisfies the functions of the present disclosure, the aperture diameter of the projection aperture unit 139 is in a second state set to a second aperture diameter PD2, and when equipped on the main body 3 that satisfies the functions of the present disclosure and subjected to a control of narrowing down, the aperture diameter of the projection aperture unit 139 is the third aperture diameter PD3. The first aperture diameter PD1, the second aperture diameter PD2, and the third aperture diameter PD3 are configured such that the following relationship holds.

[0057] The first aperture diameter PD1 > the second aperture diameter PD2 > the third aperture diameter PD3 FIG. 12 shows a comparison diagram of the aperture diameters of the diaphragm. FIG. 12(a) is an explanatory diagram showing the first aperture diameter PD1 in the first state, FIG. 12(b) is an explanatory diagram showing the second aperture diameter PD2 in the second state, and FIG. 12(c) is an explanatory diagram showing the third aperture diameter PD3 in the third state. Note that the first aperture diameter PD1 in the first state and the second aperture diameter PD2 in the second state are of predetermined sizes, and the third aperture diameter PD3 can be set to an arbitrary size from the second state to the third state under the control from the control unit 50 in the main body 3. By further narrowing the diameter of the diaphragm of the projection diaphragm unit 139 from the second state, although the amount of light to be projected decreases, the contrast can be increased. Therefore, depending on how the projection type image display device 1 is used, such as the projection size and the ambient brightness, when a higher contrast than the second state is desired, the desired contrast can be obtained because the third aperture diameter PD3 can be set to an arbitrary size. That is, the projection diaphragm unit 139 is configured to be in a third state in which it is set to a third aperture diameter PD3 smaller than the second aperture diameter PD2 from the second state. The third aperture diameter PD3 is set to an arbitrary size smaller than the second aperture diameter PD2 under the control from the control unit 50 in the main body 3.

[0058] As described above, when the projection lens unit 138 is mounted on a projector main body that is not according to the present disclosure, if there is no illumination diaphragm unit 119, the blades of the projection diaphragm unit 139 may be damaged by heat when irradiated with image light as it is. When equipped with the main body 3 that satisfies the functions of the present disclosure, since the illumination light is restricted by the illumination diaphragm unit 119, even if it is the second aperture diameter PD2 smaller than the first aperture diameter PD1, it is possible to prevent the blades of the projection diaphragm unit 139 from being damaged by heat. Therefore, the first aperture diameter PD1 and the second aperture diameter PD2 have the relationship as described above. That is, the projection diaphragm unit 139 is configured such that the first aperture diameter PD1 in the first state is always larger than the second aperture diameter PD2 in the second state.

[0059] In addition, between the set main body 3 and the projection lens unit 138, and between the mount member 142 and the projection lens flange portion 141 of the projection lens unit 138, in the case of the set according to the present disclosure, when mounted, the transition to the second aperture diameter PD2 is performed by a mechanical or electrical action, and in the case of other sets, the above action does not occur when mounted, so the first aperture diameter PD1 is maintained.

[0060] Regarding the detection of the attachment / detachment between the main body 3 and the projection lens unit 138 and the aperture drive, as described above, electrical contacts may be provided on both the main body 3 and the projection lens unit 138 for driving, or a mechanism structure that operates only when mounted on the main body 3 that satisfies the functions of the present disclosure may be provided. In that case, it can be realized by making the projection aperture drive possible. Note that the basic structure of the projection aperture unit 139 is the same as that of the illumination aperture unit 119, but since it needs to be housed in the projection lens unit 138, a smaller actuator may be used, and the connecting gears may also be configured in a smaller, annular-shaped array following the shape.

[0061] Thus, in a state where the projection lens unit 138 is mounted on the projection type image display device 1, the projection lens unit 138 can set the aperture diameter of the projection aperture unit 139 by mechanical operation control or electrical operation control from the main body 3 of the projection type image display device 1.

[0062] [1-2. Effects, etc.] As described above, the projection type image display device 1 according to the present embodiment includes a light source unit 10 that emits a first color laser beam that is blue and a second color laser beam that is green and different from blue, and the first color laser beam and the second color laser beam from the light source unit 10. An illumination optical system 20 that generates illumination light by combining the above, a light modulation unit 30 that modulates the illumination light from the illumination optical system 20 according to an image signal input from the outside to generate image light, and an image light emitted from the light modulation unit 30. And a projection lens unit 138 that enlarges and projects the object onto the projection target. The light source unit 10 includes blue laser units 101a and 101b in which a plurality of blue laser light emitting elements that emit blue laser light are arranged in an array, and a plurality of green laser light emitting elements that emit green laser light are arranged in an array. Green laser units 102a and 102b, and red laser units 103a and 103b in which a plurality of red laser light emitting elements that emit red laser light are arranged in an array. The areas of the light emitting surfaces of the blue laser units 101a and 101b are different from the areas of the light emitting surfaces of the green laser units 102a and 102b and the red laser units 103a and 103b. The illumination optical system 20 includes a relay optical system 121 that guides illumination light to the light modulation unit 30. In the relay optical system 121, at the first pupil position where the illumination light is condensed, the heights of the light source images of the blue, green, and red laser beams are equal to the heights at the time of emission from the respective laser units. Blue, green, and red afocal optical systems 115 and 116 with different magnifications according to the respective laser beams are provided. The relay optical system 121 includes a reflective illumination diaphragm unit 119 having a variable aperture diameter at the first pupil position. The projection lens unit 138 includes an absorption type projection diaphragm unit 139 having a variable aperture diameter at a second pupil position conjugate to the first pupil position.

[0063] By configuring as described above, it is possible to obtain a high contrast not only in terms of the contrast which is the brightness ratio of white and black over the entire projection area with the illumination and projection lens unit having a high F-number, but also in terms of the window contrast with a small-area black display within the white screen. In particular, for the latter, since reflected light and stray light within the projection optical system, especially within the projection lens unit 138, cause degradation, performance superior to that of the conventional system can be obtained. In the present disclosure, since the light source unit 10 is a laser and the spread of light is small, the spread of the illumination light in the illumination optical system 20 can be minimized, and even with a high F-number by the illumination aperture unit 119 and the projection aperture unit 139, the brightness is less likely to decrease compared to the conventional system. Furthermore, since the relay optical system 121 includes afocal optical systems 115 and 116 with different magnifications, the intensity distribution within the pupil in the illumination optical system 20 for each color light is also substantially the same. Therefore, even when the illumination aperture unit 119 further narrows the aperture 122 in conjunction with the projection aperture unit 139 of the projection lens unit 138 to obtain a higher contrast, an image with no color change can be provided without changing the balance between colors.

[0064] The areas of the emission surfaces of the blue laser units 101a and 101b are smaller than those of the emission surfaces of the green laser units 102a and 102b and the red laser units 103a and 103b. As a result, the amount of blue light is concentrated in the central region. If it is directly combined with the green and red laser lights in this state, the central region of the combined light will look bluish, and there will be insufficient blue light in the peripheral region. In this state, when the illumination light is restricted by the illumination aperture unit 119 and the image light is restricted by the projection aperture unit 139, the color may change due to the scattering of the surrounding light depending on the aperture setting. On the other hand, optical systems with different magnifications are provided according to the respective laser lights so that the heights of the light source images of the blue, green, and red laser lights are equal to the heights at the time of emission from their respective laser units. This can reduce the concentration of the amount of blue light in the central region and reduce the color change due to the scattering of light. Here, "so that the heights of the light source images of the blue, green, and red laser lights are equal to the heights at the time of emission from their respective laser units" includes not only the case where they are exactly equal but also the case where the heights of the respective light source images of the blue, green, and red laser lights approach the heights at the time of emission from their respective laser units.

[0065] (Other embodiments) As described above, the above embodiments have been described as examples of the technology disclosed in the present application. However, the technology in the present disclosure is not limited to this, and can also be applied to embodiments with changes, replacements, additions, omissions, etc. It is also possible to combine the components described in the above embodiments to form a new embodiment.

[0066] In the embodiment, in this embodiment, by devising the arrangement of the laser unit as the light source and the mirrors, the light fluxes of each color light are arranged at high density. However, the means is not limited to this. Even if a prism is used, if the afocal optical diameter magnification is changed according to the color light so that the finally obtained light source image size (the height of the light flux from the optical axis) is converted to a close value, the same effect can be expected.

[0067] In the embodiment, the light modulation unit 30 is a system equipped with three DMD devices as light modulation elements, but it can also be applied to a one-chip system using one DMD, or a system using three LCD panels. However, the mainstream LCD panel system is one in which the integrator is composed of a microlens array, and in this case, the same effect can be obtained by placing an illumination diaphragm near the exit side microlens array as the pupil position.

[0068] In the embodiment, the light source unit 10 includes a blue laser unit, a green laser unit, and a red laser unit, which respectively emit blue laser light, green laser light, and red laser light, but is not limited to this. The light source unit 10 may include a blue laser unit and a green laser unit, or a blue laser unit and a red laser unit, and may be configured to emit two colors of laser light.

[0069] As described above, the embodiment has been described as an example of the technology in the present disclosure. For this purpose, the attached drawings and detailed description have been provided. Therefore, among the components described in the attached drawings and detailed description, not only components essential for solving the problem but also components that are not essential for solving the problem in order to exemplify the above technology may be included. Therefore, the fact that these non-essential components are described in the attached drawings or detailed description should not be used to immediately determine that these non-essential components are essential.

[0070] Furthermore, since the above-described embodiments are intended to illustrate the technology in the present disclosure, various modifications, substitutions, additions, omissions, and the like can be made within the scope of the claims or their equivalents.

[0071] (Outline of the embodiment) (1) The projection type image display device of the present disclosure includes a light source unit that emits a first color laser beam that is blue and a second color laser beam that is a color different from blue, and a first color laser beam from the light source unit and a second color laser beam. An illumination optical system that generates illumination light by combining the laser beams, a light modulation unit that modulates the illumination light from the illumination optical system according to an image signal input from the outside to generate image light, and an image that is emitted from the light modulation unit. And a projection optical system that magnifies and projects the light onto the projection object. The light source unit includes a first light source component in which a plurality of first laser light emitting elements that respectively emit a first color laser beam are arranged in an array, and a plurality of second laser light emitting elements that respectively emit a second color laser beam. And a second light source component arranged in an array. The area of the light emitting surface of the first light source component is different from the area of the light emitting surface of the second light source component. The illumination optical system includes a relay optical system that guides the illumination light to the light modulation unit. In the relay optical system, at a first pupil position where the illumination light is condensed, the heights of the source images of the first color and second color laser beams are equal to their respective heights at the time of emission. Each of the first color and second color laser beams is provided with an optical system having a different magnification. The relay optical system includes a reflective first aperture with a variable aperture diameter at the first pupil position. The projection optical system includes an absorptive second aperture with a variable aperture diameter at a second pupil position conjugate to the first pupil position.

[0072] As a result, high contrast can be obtained, and furthermore, reflected light and stray light in the projection optical system can be reduced. Further, since the light source is a laser and has a small spread, the spread of the illumination light in the illumination optical system can be minimized, and the brightness is less likely to decrease even with a higher F-number than in the conventional system. Further, by providing the relay optical system with optical systems having different magnifications, the intensity distribution in the pupil in the illumination optical system for each color light is also substantially the same. Therefore, even when the illumination aperture is further reduced in conjunction with the aperture of the projection lens unit to obtain a higher contrast, the balance between the colors does not change, and an image without color change can be provided.

[0073] (2) In the projection type image display device of (1), the light source unit emits laser light of a third color different from the first and second colors, and the illumination optical system generates illumination light by combining the laser light of the first color, the laser light of the second color, and the laser light of the third color. The light source unit includes a third light source component in which a plurality of third laser light emitters element that emit laser light of the third color are arranged in an array. The area of the light emitting surface of the first light source component is different from the area of the light emitting surface of at least one of the second light source component and the third light source component. The optical system of the relay optical system is such that at the first pupil position where the illumination light is condensed, the heights of the light source images of the laser lights of the first color, the second color, and the third color are equal to the heights at the time of each emission, and at least the magnification of the laser light of the first color is different from the magnification of each of the laser lights of the second color or the third color. element The light source unit includes a third light source component in which a plurality of third laser light emitters element that emit laser light of the third color are arranged in an array. The area of the light emitting surface of the first light source component is different from the area of the light emitting surface of at least one of the second light source component and the third light source component. The optical system of the relay optical system is such that at the first pupil position where the illumination light is condensed, the heights of the light source images of the laser lights of the first color, the second color, and the third color are equal to the heights at the time of each emission, and at least the magnification of the laser light of the first color is different from the magnification of each of the laser lights of the second color or the third color.

[0074] (3) In the projection type image display device of (1) or (2), the projection optical system is a projection lens unit detachable from the main body of the projection type image display device. The projection lens unit includes a second aperture. When the second aperture is not controlled from the outside, the second aperture is in a first state set to a first aperture diameter, and when the projection lens unit is mounted on a predetermined projector, the second aperture is in a second state set to a second aperture diameter. The respective aperture diameters of the second aperture in the first state and the second state are always controlled such that the aperture diameter in the first state > the aperture diameter of the second aperture in the second state.

[0075] (4) In the projection type image display device of (3), when the projection lens unit is mounted on a predetermined projection type image display device, in addition to the second state in which the second aperture of the projection lens unit is set to the second aperture diameter, the second aperture can be changed to a third state in which the second aperture is set to a third aperture diameter under the control from the main body of the projection type image display device. The respective aperture diameters of the second aperture in the first, second, and third states have the relationship of the aperture diameter in the first state > the aperture diameter in the second state > the aperture diameter in the third state, and the third aperture diameter of the second aperture can be set to any size when changing from the second state to the third state under the control from the main body.

[0076] (5) In the projection type image display device of (4), in a state where the projection lens unit is attached to the projection type image display device, the projection lens unit can set the aperture diameter of the second diaphragm by mechanical operation control or electrical operation control from the main body of the projection type image display device.

[0077] (6) In any one of the projection type image display devices of (1) to (5), the first diaphragm of the illumination optical system is composed of a plurality of movable blades made of a material subjected to high heat conduction and high reflection treatment, and its surface is a diffuse reflection surface.

[0078] (7) In any one of the projection type image display devices of (3) to (5), the second diaphragm of the projection lens unit includes a material subjected to light absorption treatment and has a plurality of movable blades.

[0079] (8) In any one of the projection type image display devices of (1) to (7), the illumination optical system is provided with an afocal optical system having different magnifications.

[0080] (9) In the projection type image display device of (8), the afocal optical system provided in at least the optical path of the first color has a different magnification from the afocal optical system provided in the optical path of the other color.

[0081] (10) In any one of the projection type image display devices of (1) to (9), the laser light of the first color emitted from the light source unit is the laser light of the first color emitted from a plurality of first light source components combined, and the interval between the center of gravity positions of the respective light beams from the plurality of first light source components is shorter than the interval formed by arranging the outer shapes of the respective first light source components in contact with each other in the interval direction.

[0082] (11) In any one of the projection-type image display devices (1) to (10), the laser light of the second color emitted from the light source unit is the combined emission of the laser lights of the second color respectively emitted from a plurality of second light source components, and the interval between the center-of-gravity positions of the respective light beams from the plurality of second light source components is shorter than the interval formed by arranging the outer shapes of the respective second light source components in contact with each other in the interval direction.

[0083] (12) In the projection-type image display device (2), the laser light of the third color emitted from the light source unit is the combined emission of the laser lights of the third color respectively emitted from a plurality of third light source components, and the interval between the center-of-gravity positions of the respective light beams from the plurality of third light source components is shorter than the interval formed by arranging the outer shapes of the respective third light source components in contact with each other in the interval direction.

Industrial Applicability

[0084] The present disclosure is applicable to a projection display device using laser light as a light source.

Explanation of Signs

[0085] 1 Projection-type image display device 10 Light source unit 20 Illumination optical system 30 Light modulation unit 50 Control unit 101a, 101b Blue laser unit 102a, 102b Green laser unit 103a, 103b Red laser unit 104a Laser light-emitting element 105a Laser light-emitting element 106a Laser light-emitting element 107G, 109G green light beams 107R, 109R red light beams 108a, 108b Mirror 110a, 110b, 111a, 111b Mirror 112 Light source light beam 113 Rod integrator 113a Exit port 114 light collecting lens 115 afocal optical system for blue 115a convex lens 115b concave lens 116 afocal optical system for red and green 116a convex lens 116b concave lens 117 blue transmission dichroic mirror 118 lens 119 illumination aperture unit 121 relay optical system 122 aperture 123 lens 124 folding mirror 125 field lens 126 total reflection prism 127 first prism 128 second prism 129 total reflection surface 130 surface of the first prism 131 color prism unit 132 blue transmission dichroic mirror surface 133 first prism 134 green transmission dichroic mirror surface 135 second prism 136 third prism 137R, 137G, 137B light modulation elements 138 projection lens unit 139 projection aperture unit 141 projection lens flange part 142 mount member 143 stepping motor 144 slip clutch 145 gear 146 sector gear 147 aperture vane 148 front plate

Claims

1. A light source unit that emits a first color laser beam that is blue and a second color laser beam that is different from blue; An illumination optical system that generates illumination light by combining the first color laser beam and the second color laser beam from the light source unit; A light modulation unit that modulates the illumination light from the illumination optical system according to an image signal input from the outside to generate image light; A projection optical system that enlarges the image light emitted from the light modulation unit and projects it onto a projection object, comprising: The light source unit is: A first light source component that includes a plurality of first laser light emitting elements that are arranged in an array and each emit the first color laser beam; A second light source component that includes a plurality of second laser light emitting elements that are arranged in an array and each emit the second color laser beam; The area of the light emitting surface of the first light source component is different from the area of the light emitting surface of the second light source component; The illumination optical system includes a relay optical system that guides the illumination light to the light modulation unit; The light source unit further includes an optical system that changes at least one of the height of the light source image of the first color laser beam and the height of the light source image of the second color laser beam; The optical system of the light source unit is configured such that the magnification for changing the height of the light source image of the first color laser beam and the magnification for changing the height of the light source image of the second color laser beam are different so that the difference between the height of the light source image of the first color laser beam and the height of the light source image of the second color laser beam becomes small; The relay optical system includes a reflective first aperture having a variable aperture diameter, which is disposed at a first position where the illumination light is focused; The projection optical system includes an absorptive second aperture having a variable aperture diameter, which is disposed at a second position that is conjugate to the first position; The aperture diameter of the second aperture is greater than or equal to the aperture diameter of the first aperture; A projection type image display device.

2. The light source unit emits a third color laser beam that is different from the first color and the second color; The illumination optical system generates the illumination light by combining the first color laser beam, the second color laser beam, and the third color laser beam; The light source unit further includes a third light source component that includes a plurality of third laser light emitting elements that are arranged in an array and each emit the third color laser beam; The area of the light emitting surface of the first light source component is different from the area of the light emitting surface of the third light source component; The optical system of the light source unit changes the height of the light source image of the laser light of the third color, The optical system of the light source unit is configured such that the magnification for changing the height of the light source image of the laser light of the first color and the magnification for changing the height of the light source image of the laser light of the third color are different so that the difference between the height of the light source image of the laser light of the first color and the height of the light source image of the laser light of the third color becomes small. The projection type image display device according to claim 1.

3. The projection optical system is a projection lens unit detachable from the main body of the projection type image display device, The projection lens unit includes the second aperture, When the second aperture is not controlled from the outside, the second aperture is in a first state set to a first aperture diameter, When the projection lens unit is attached to a predetermined projector, the second aperture is in a second state set to a second aperture diameter, The second aperture is configured such that the first aperture diameter in the first state is always larger than the second aperture diameter in the second state. The projection type image display device according to claim 1.

4. The second aperture is configured to be in a third state set to a third aperture diameter smaller than the second aperture diameter from the second state, The third aperture diameter is set to any size smaller than the second aperture diameter by control from the main body. The projection type image display device according to claim 3.

5. In a state where the projection lens unit is attached to the projection type image display device, the aperture diameter of the second aperture is set by mechanical operation control or electrical operation control from the main body of the projection type image display device. The projection type image display device according to claim 4.

6. The first aperture, Has a plurality of movable vanes, The plurality of movable vanes mainly diffusely reflect 70% or more of the light incident on the plurality of movable vanes. The projection type image display device according to claim 1.

7. The second aperture, Has a plurality of movable vanes, The plurality of movable vanes absorb 90% or more of the visible light incident on the plurality of movable vanes. The projection type image display device according to claim 1.

8. The optical system of the light source unit, A first afocal optical system that changes the height of the light source image of the laser light of the first color to a first height, and A second afocal optical system that changes the height of the light source image of the laser light of the second color to a second height. The first afocal optical system and the second afocal optical system are configured such that the difference between the first height and the second height is smaller than the difference between the height of the light source image of the laser light of the first color before entering the first afocal optical system and the height of the light source image of the laser light of the second color before entering the second afocal optical system. The projection type image display device according to claim 1.

9. The illumination optical system further includes a dichroic mirror that combines the laser light of the first color and the laser light of the second color. The first afocal optical system is disposed between the first light source component and the dichroic mirror. The second afocal optical system is disposed between the second light source component and the dichroic mirror. The projection type image display device according to claim 8.

10. The optical system of the light source unit includes a first afocal optical system that changes the height of the light source image of the laser light of the first color to a first height. The first afocal optical system is configured such that the difference between the first height and the height of the light source image of the laser light of the second color is smaller than the difference between the height of the light source image of the laser light of the first color before entering the first afocal optical system and the height of the light source image of the laser light of the second color. The projection type image display device according to claim 1.

11. The optical system of the light source unit includes a second afocal optical system that changes the height of the light source image of the laser light of the second color to a second height. The second afocal optical system is configured such that the difference between the height of the light source image of the laser light of the first color and the second height is smaller than the difference between the height of the light source image of the laser light of the first color and the height of the light source image of the laser light of the second color before entering the second afocal optical system. The projection type image display device according to claim 1.

12. The light source unit includes a fourth light source component that emits the laser light of the first color respectively and includes a plurality of fourth laser light emitting elements arranged in an array. a first mirror that reflects the laser light of the first color emitted by the first light source component. a fourth mirror that reflects the laser light of the first color emitted by the fourth light source component. The distance between the centroid position of the light beam of the laser light of the first color reflected by the first mirror and the centroid position of the light beam of the laser light of the first color reflected by the fourth mirror is shorter than the distance between the center position of the first light source component and the center position of the fourth light source component when the outer shapes of the first light source component and the fourth light source component are arranged in contact with each other. The projection type image display device according to claim 1.

13. The light source unit A fifth light source component including a plurality of fifth laser light emitting elements that respectively emit the laser light of the second color and are arranged in an array, A second mirror that reflects the laser light of the second color emitted by the second light source component, A fifth mirror that reflects the laser light of the second color emitted by the fifth light source component, and further includes: The distance between the centroid position of the light beam of the laser light of the second color reflected by the second mirror and the centroid position of the light beam of the laser light of the second color reflected by the fifth mirror is shorter than the distance between the center position of the second light source component and the center position of the fifth light source component when the outer shapes of the second light source component and the fifth light source component are arranged in contact with each other. The projection type image display device according to claim 1.

14. The light source unit A sixth light source component including a plurality of sixth laser light emitting elements that respectively emit the laser light of the third color and are arranged in an array, A third mirror that reflects the laser light of the third color emitted by the third light source component, A sixth mirror that reflects the laser light of the third color emitted by the sixth light source component, and further includes: The distance between the centroid position of the light beam of the laser light of the third color reflected by the third mirror and the centroid position of the light beam of the laser light of the third color reflected by the sixth mirror is shorter than the distance between the center position of the third light source component and the center position of the sixth light source component when the outer shapes of the third light source component and the sixth light source component are arranged in contact with each other. The projection type image display device according to claim 2.

15. The second color is green, The third color is red, The projection type image display device according to claim 2.

16. The area of the light emitting surface of the first light source component is smaller than the area of the light emitting surface of the second light source component. The projection type image display device according to claim 1.

17. The relay optical system further includes a lens that condenses the illumination light at the first position. The projection type image display device according to claim 1.

Images