projector

Abstract

To display a bright image in a single plate type projector.SOLUTION: A projector comprises: a light source device that emits white light including blue light, green light, and red light; a lens array having a plurality of lenses; a color filter including a blue filter that transmits the blue light, a green filter that transmits the green light, and a red filter that transmits the red light; a pixel electrode including a blue sub-pixel electrode that modulates the blue light transmitted through the blue filter according to image information and emits blue image light, a green sub-pixel electrode that modulates the green light transmitted through the green filter according to the image information and emits green image light, and a red sub-pixel electrode that modulates the red light transmitted through the red filter according to the image information and emits red image light; and a projection optical system that projects the blue, green, and red image light. The area of a second lens is larger than the area of the green filter and is larger than the areas of a first lens and the area of a third lens.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a projector. [Background technology]

[0002] In recent years, projectors equipped with one liquid crystal panel as a light modulation device that generates image light of a corresponding color from color light, that is, single-panel projectors, have become known. For example, Patent Document 1 discloses a single-panel projector that uses a light emitting diode (LED) as a light source. In the projector disclosed in Patent Document 1, a reflector, a reflection mirror, a collimating lens, a liquid crystal display as a light modulation device, a condensing lens, etc. are arranged on the optical path of the light emitted from the LED light source.

[0003] Patent Document 2 discloses a single-panel projector including a liquid crystal display as a light modulation device and two microlens arrays. The liquid crystal display of the projector disclosed in Patent Document 2 has a plurality of pixels between two transparent substrates. The plurality of pixels are arranged at a predetermined interval in a direction parallel to the plate surface of the transparent substrate. The two microlens arrays are arranged on the entrance surface and exit surface of the liquid crystal display. The light incident on the liquid crystal display is collimated and is collected on each pixel by each microlens of the microlens array arranged on the entrance surface of the liquid crystal display. The light collected on the pixel is modulated according to image information and is emitted from the pixel as image light. The light emitted from the pixel is collimated by each microlens of the microlens array arranged on the exit surface of the liquid crystal display. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] China Utility Model No. 212515320 Specification [Patent Document 2] Japanese Patent Application Publication No. 7-191312 Summary of the Invention [Problem to be solved by the invention]

[0005] In the single-panel projectors disclosed in Patent Documents 1 and 2, the difference in the amount of light of the image light of each color of red, green, and blue generated by the liquid crystal display is not particularly considered. In the projector disclosed in Patent Document 2, the difference in the diameter of the multiple microlenses for the multiple pixels is also not considered. However, a human observer who observes an image or video projected from a projector perceives green light having a wavelength of about 555 nm as the strongest and brightest in a bright place such as indoors. Therefore, a measure has been desired to realize an image or video that is perceived brighter than that of a conventional projector by adjusting the brightness of the image or video projected by the projector to the visual sensitivity of the observer. [Means for solving the problem]

[0006] In order to solve the above problems, a projector according to one embodiment of the present invention comprises: a light source device that emits white light containing blue light, green light, and red light; a lens array having a plurality of lenses and arranged on an optical path of the white light emitted from the light source device; a color filter that is arranged on the optical path of the white light emitted from the lens array and includes a blue filter that transmits blue light, a green filter that transmits green light, and a red filter that transmits red light; a pixel electrode that is arranged opposite the color filter and includes: a blue subpixel electrode that modulates the blue light that transmits through the blue filter in accordance with image information and emits blue image light, a green subpixel electrode that modulates the green light that transmits through the green filter in accordance with image information and emits green image light, and a red subpixel electrode that modulates the red light that transmits through the red filter in accordance with image information and emits red image light; and a projection optical system that is arranged on the paths of the blue, green, and red image lights and projects the blue, green, and red image light. The lenses include a first lens that emits white light toward a blue filter, a second lens that emits white light toward a green filter, and a third lens that emits white light toward a red filter, the area of ​​the second lens being larger than the area of ​​the green filter and larger than the areas of the first lens and the third lens. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a schematic diagram illustrating a configuration of a projector according to an embodiment. [Diagram 2] 2 is a schematic diagram of a lens array and color filters of a light modulation device of the projector of FIG. 1. [Diagram 3] 3 is a schematic diagram of a lens array and a light modulation device of the projector of FIG. 1, and is a cross-sectional view taken along line C1-C1 shown in FIG. 2. [Figure 4] 3 is a schematic diagram of a lens array and a light modulation device of the projector of FIG. 1, and is a cross-sectional view taken along line C2-C2 of FIG. 2. [Diagram 5] FIG. 2 is a perspective view of a lens array of the projector in FIG. [Figure 6] 11 is a schematic diagram of a lens array and color filters of a light modulation device in a first modified example of a projector according to an embodiment. FIG. [Figure 7] 13 is a schematic diagram of a lens array and color filters of a light modulation device in a fourth modified example of a projector according to an embodiment. FIG. [Figure 8] 13 is a schematic diagram of a lens array and a color filter of a light modulation device in a fifth modified example of a projector according to an embodiment. FIG. [Figure 9] 9 is a schematic diagram of a lens array and a light modulation device of the projector of FIG. 8, and is a cross-sectional view taken along line C1-C1 of FIG. 2. [Figure 10] 9 is a schematic diagram of a lens array and a light modulation device of the projector of FIG. 8, and is a cross-sectional view taken along line C2-C2 of FIG. 2. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In each drawing, the scale of each component may be changed in order to make each component easier to see.

[0009] First, an embodiment of the present invention will be described with reference to Figs. 1 to 5. Fig. 1 is a schematic diagram showing the configuration of a projector 301 according to an embodiment of the present invention. The projector 301 is an image display device equipped with one liquid crystal panel as a light modulation device, and is a so-called single-panel projector. As shown in Fig. 1, the projector 301 includes a light source device 10, a pickup optical system 20, a collimating lens 25, an entrance-side polarizing plate 30, a lens array 40, a light modulation device 50, an exit-side polarizing plate 80, a condenser lens 85, and a projection optical system 90.

[0010] As shown in Fig. 1, the light source device 10 has a light emitting element 12 and a wavelength conversion element 14. The light emitting element 12 is provided on a plate surface of a substrate (not shown). The light emitting element 12 is formed in a plate or layer shape and has plate surfaces 12a and 12b. The planar shape of the plate surfaces 12a and 12b is, for example, rectangular.

[0011] The light emitting element 12 emits blue light BL from the plate surface 12a and some of the side surfaces. The peak wavelength of the blue light BL is within a range of, for example, 455 nm to 465 nm. The emission wavelength band of the light emitting element 12 is, for example, 445 nm to 475 nm, but is not limited to the above wavelength band, and may be any wavelength band that includes the wavelengths of the blue components of the image lights IM1 and IM2 described below and the excitation wavelength of the wavelength conversion element 14. The light emitting element 12 is, for example, a blue light emitting diode (LED).

[0012] The wavelength conversion element 14 is provided on the plate surface 12b of the light emitting element 12 and is laminated on the light emitting element 12. The wavelength conversion element 14 has the same shape and size in a plan view as the light emitting element 12, is formed in a plate or layer shape, and has plate surfaces 14a and 14b. The plate surface 14a of the wavelength conversion element 14 is in contact with the plate surface 12b of the light emitting element 12.

[0013] The blue light BL emitted from the plate surface 12b of the light emitting element 12 is incident on the wavelength conversion element 14 from the plate surface 12b. The wavelength conversion element 14 is excited by at least a part of the blue light BL among the incident blue light BL, and emits yellow light YL from the plate surface 14b as fluorescence. The peak wavelength of the yellow light YL is included in the range of 530 nm to 570 nm, for example. That is, the yellow light YL has a different wavelength from the blue light BL, and is a light of a different color from the blue light BL. Specifically, the yellow light YL includes green light and red light, and is a color light for generating full-color image lights IM1 and IM2 together with the blue light BL.

[0014] At least a part of the remaining blue light BL among the blue light BL incident on the wavelength conversion element 14 is transmitted through the wavelength conversion element 14 and emitted from the plate surface 14b. The wavelength conversion element 14 is formed of, for example, an yttrium aluminum garnet (YAG) ceramic phosphor, and is, for example, YAG activated with cerium (Ce) (YAG: Ce). 3+ ) The wavelength conversion element 14 may be formed of one type of material, or may be formed of a material in which particles formed of two or more types of fluorescent materials are mixed.

[0015] The blue light BL and the yellow light YL emitted from the plate surface 14b of the wavelength conversion element 14 are combined to generate white light WL1. That is, the wavelength conversion element 14 emits the white light WL1 from the plate surface 14b.

[0016] In the following description and drawings, an axis parallel to the optical axis AX of the white light WL1 emitted from the plate surface 14b of the wavelength conversion element 14 is referred to as the Z axis. One side of the Z axis is referred to as the +Z side, and the other side of the Z axis is referred to as the -Z side. An axis perpendicular to the Z axis is referred to as the X axis. One side of the X axis is referred to as the +X side, and the other side of the X axis is referred to as the -X side. An axis perpendicular to the X and Z axes is referred to as the Y axis. One side of the Y axis is referred to as the +Y side, and the other side of the Y axis is referred to as the -Y side. A plane perpendicular to the Z axis and including the X and Y axes is referred to as the XY plane.

[0017] The plate surfaces 12a and 12b of the light emitting element 12 and the plate surfaces 14a and 14b of the wavelength conversion element 14 are arranged parallel to the XY plane. The plate surface 14b of the wavelength conversion element 14 constitutes an emission surface 10s of the light source device 10. The light emitting area of ​​the light source device 10 is equal to the area of ​​the plate surface 14b of the wavelength conversion element 14.

[0018] The light source device 10 emits white light WL1 from the emission surface 10s toward the +Z side along the Z axis. The white light WL1 emitted from the light source device 10 is a divergent light that spreads in the XY plane as it travels from the plate surface 14b of the wavelength conversion element 14 toward the +Z side along the Z axis. The white light WL1 is not a specific polarized light, but is unpolarized light, for example, randomly polarized light. FIG. 1 illustrates polarized light parallel to the X axis and polarized light parallel to the Y axis among the polarized light contained in the white light WL1.

[0019] The pickup optical system 20 is disposed on the optical path of the white light WL1 emitted from the light source device 10. The pickup optical system 20 is disposed on the +Z side of the light source device 10, and is disposed at a distance from the light source device 10 along the Z axis. The white light WL1 between the light source device 10 and the pickup optical system 20 travels along the Z axis and is not deflected. Therefore, the pickup optical system 20 is disposed within a range including the light source device 10 on the X and Y axes. The pickup optical system 20 appropriately expands the beam diameter of the incident white light WL1 in the XY plane, and emits the white light WL1 having a desired beam diameter to the +Z side along the Z axis.

[0020] The pickup optical system 20 is composed of, for example, one plano-convex lens 22. The centers of the plano-convex lens 22 in the X-axis and Y-axis are located on the optical axis AX of the white light WL1. The entrance surface 22a of the plano-convex lens 22 is a flat surface parallel to the XY plane. The exit surface 22b of the plano-convex lens 22 is a curved surface convex toward the +Z side. The diameter of the plano-convex lens 22 and the shape of the exit surface 22b are appropriately designed according to the radiation characteristics, spread angle, divergence, etc. of the white light WL1 entering the pickup optical system 20.

[0021] As described above, the pickup optical system 20 is composed of optical elements capable of generating white light WL1 having a desired beam diameter, and may be composed of, for example, a biconvex lens or an aspheric lens instead of the plano-convex lens 22, or may be an optical system combining multiple optical lenses.

[0022] The collimating lens 25 is disposed on the optical path of the white light WL1 emitted from the pickup optical system 20. The collimating lens 25 is disposed on the +Z side of the pickup optical system 20, and is disposed at a distance from the pickup optical system 20 along the Z axis. The white light WL1 between the pickup optical system 20 and the collimating lens 25 travels along the Z axis and is not deflected. Therefore, the collimating lens 25 is disposed within a range including the light source device 10 on the X axis and Y axis. The collimating lens 25 collimates the incident white light WL1, and emits the collimated white light WL1 to the +Z side along the Z axis.

[0023] The parallelizing lens 25 is composed of, for example, a Fresnel lens 27. The centers of the Fresnel lens 27 in the X-axis and Y-axis are located on the optical axis AX. The entrance surface 27a of the Fresnel lens 27 is a surface obtained by removing the equiphase component of the lens curved surface designed in accordance with the beam diameter and intensity distribution of the white light WL1 in the XY plane, and the distance in the Z axis from the emission position of the white light WL1 in the light source device 10 to the entrance surface 27a. The thickness of the equiphase component depends on the central wavelength of the white light WL1 and the refractive index of the Fresnel lens 27. When viewed along the Z axis, the entrance surface 27a has the surfaces obtained as described above arranged concentrically in the XY plane. In the Fresnel lens 27, the difference between the inner diameter and the outer diameter of the lens curved surface divided by the thickness of the equiphase component centered on the optical axis AX becomes smaller as it moves away from the optical axis AX in the radial direction. The exit surface 27b of the Fresnel lens 27 is a flat surface parallel to the XY plane.

[0024] As described above, the collimating lens 25 is made of an optical element capable of collimating the white light WL1, and may be made of a plano-convex lens or an aspheric lens instead of the Fresnel lens 27. The beam area of ​​the white light WL1 emitted from the collimating lens 25 includes a modulation area of ​​the light modulation device 50, which will be described later, in the XY plane. The modulation area means an area in which a plurality of pixels 64 of the pixel electrode 62 of the light modulation device 50 are arranged. In light of this, the collimating lens 25 has a diameter equal to or larger than the dimensions in the X-axis and Y-axis of the modulation area of ​​the light modulation device 50 included in the single-panel projector 301. By using the Fresnel lens 27 as the collimating lens 25, the thickness of the collimating lens 25 in the Z-axis is appropriately suppressed.

[0025] The incident side polarizing plate 30 is disposed on the optical path of the white light WL1 emitted from the parallelizing lens 25. The incident side polarizing plate 30 is disposed on the +Z side of the parallelizing lens 25, and is disposed at a distance from the parallelizing lens 25 on the Z axis. The white light WL1 between the parallelizing lens 25 and the incident side polarizing plate 30 travels along the Z axis and is not deflected. Therefore, the incident side polarizing plate 30 is disposed within the same range as the parallelizing lens 25 on the X axis and Y axis. The incident side polarizing plate 30 emits white light WL2, which is a predetermined polarization of the incident white light WL1. The predetermined polarization is, for example, P polarization or S polarization.

[0026] The incident-side polarizing plate 30 is, for example, an absorptive polarizing plate 32 having sensitivity in the visible wavelength band. The centers of the polarizing plate 32 in the X-axis and Y-axis are disposed on the optical axis AX. The incident surface 32a and the exit surface 32b of the polarizing plate 32 are parallel to the XY plane.

[0027] The lens array 40 is disposed on the optical path of the white light WL2 emitted from the incident-side polarizing plate 30. The lens array 40 is disposed on the +Z side of the incident-side polarizing plate 30, and is disposed at a distance from the incident-side polarizing plate 30 along the Z axis. The white light WL2 between the incident-side polarizing plate 30 and the lens array 40 travels along the Z axis and is not deflected. Therefore, the lens array 40 is disposed within the same range as the incident-side polarizing plate 30 in the X and Y axes. The lens array 40 divides the white light WL2 into multiple microscopic regions in the XY plane, and collects the white light WL2 in each microscopic region.

[0028] The lens array 40 has a plurality of microlenses 42 provided in a plurality of minute regions. The plurality of microlenses 42 are arranged along the X-axis and the Y-axis. An entrance surface 40a of the lens array 40 is constituted by the entrance surfaces of the plurality of microlenses 42. An exit surface 40b of the lens array 40 is a flat surface parallel to the XY plane. The plurality of microlenses 42 will be described later. Note that the plurality of microlenses 42 are omitted in FIG. 1.

[0029] The light modulation device 50 is disposed on the optical path of the white light WL2 emitted from the lens array 40. The light modulation device 50 is disposed on the +Z side of the lens array 40 and is disposed at a distance from the lens array 40 along the Z axis. The white light WL2 between the lens array 40 and the light modulation device 50 travels along the Z axis and is not deflected. Therefore, the light modulation device 50 is disposed within the same range as the lens array 40 in the X and Y axes. The light modulation device 50 modulates the incident white light WL2 according to an electrical signal input from an image output device (not shown) provided outside the projector 301, and generates full-color image light IM1, IM2.

[0030] The light modulation device 50 is composed of a color filter 52 and a pixel electrode 62. The color filter 52 is formed in a plate shape. The center of the color filter 52 in the X-axis and Y-axis and the center of the pixel electrode 62 in the X-axis and Y-axis are disposed on the optical axis AX. The entrance surface 52a and the exit surface 52b of the color filter 52 are parallel to the XY plane. The entrance surface 52a of the color filter 52 faces the exit surface 40b of the lens array 40.

[0031] The color filter 52 includes a plurality of blue filters 54B, a plurality of green filters 54G, a plurality of red filters 54R, and a light-shielding region 56. The blue filters 54B transmit blue light of the incident white light WL2. The green filters 54G transmit green light of the incident white light WL2. The peak wavelength of the green light is, for example, within a range of 520 nm to 570 nm. The red filters 54R transmit red light of the incident white light WL2. The peak wavelength of the red light is, for example, within a range of 590 nm to 640 nm. The light-shielding region 56 blocks the incident white light WL2 and does not transmit any of the blue, green, and red lights.

[0032] The pixel electrode 62 is thicker than the color filter 52 and is formed in a generally plate-like shape. An incident surface 62a and an exit surface 62b of the pixel electrode 62 are parallel to the XY plane. The incident surface 62a of the pixel electrode 62 contacts the exit surface 52b of the color filter 52.

[0033] The pixel electrode 62 has a plurality of pixels 64. The plurality of pixels 64 are aligned along the X-axis and the Y-axis. The pixels 64 include a blue subpixel electrode 66B, a green subpixel electrode 66G, and a red subpixel electrode 66R. The relative arrangements of the blue filter 54B, the green filter 54G, the red filter 54R, and the light-shielding region 56 of the color filter 52 with respect to the first lens, the second lens, and the third lens of the lens array 40, and the relative arrangements of the blue subpixel electrode 66B, the green subpixel electrode 66G, and the red subpixel electrode 66R of the plurality of pixels 64 of the pixel electrode 62 will be described later.

[0034] The pixel electrode 62 is electrically connected to the image output device (not shown). The image output device is, for example, a computer or a tablet terminal. An electrical signal supplied from the image output device to the pixel electrode 62 is converted into an electrical signal according to the modulation amount of the color light modulated in each of the blue subpixel electrode 66B, the green subpixel electrode 66G, and the red subpixel electrode 66R of each pixel 64 by circuits, wiring, and the like (not shown) provided in the pixel electrode 62, and is supplied to the subpixel electrodes of each color.

[0035] The blue subpixel electrode 66B, the green subpixel electrode 66G, and the red subpixel electrode 66R each include a switching element formed of, for example, a polysilicon thin film transistor (TFT). The blue subpixel electrode 66B changes the polarization direction of the blue light passing through the blue filter 54B by the operation of the switching element in response to an electrical signal input from the image output device. As a result, the blue subpixel electrode 66B modulates the incident blue light and emits blue image light. The green subpixel electrode 66G changes the polarization direction of the green light passing through the green filter 54G by the operation of the switching element in response to an electrical signal input from the image output device. As a result, the green subpixel electrode 66G modulates the incident green light and emits green image light. The red subpixel electrode 66R changes the polarization direction of the red light passing through the red filter 54R by the operation of the switching element in response to an electrical signal input from the image output device. As a result, the red subpixel electrode 66R modulates the incident red light and emits red image light.

[0036] The blue image light emitted from the blue subpixel electrode 66B of the pixel electrode 62, the green image light emitted from the green subpixel electrode 66G, and the red image light emitted from the red subpixel electrode 66R are combined for each pixel to become full-color image light IM1. The image light IM1 is omitted in Fig. 1. The image light IM1 will be described later.

[0037] The exit-side polarizing plate 80 is disposed on the optical path of the full-color image light IM1 exiting from the light modulation device 50. The exit-side polarizing plate 80 is disposed on the +Z side of the pixel electrodes 62 of the light modulation device 50, and is in contact with the light modulation device 50. The exit-side polarizing plate 80 is disposed within the same range as the light modulation device 50 in terms of the X-axis and Y-axis. The exit-side polarizing plate 80 exits image light IM2, which is a predetermined polarization of the full-color image light IM1 entering from the light modulation device 50.

[0038] The exit-side polarizing plate 80 is, for example, an absorptive polarizing plate 82 having sensitivity in the visible wavelength band. The centers of the polarizing plate 82 in the X-axis and Y-axis are disposed on the optical axis AX. The incident surface 82a and the exit surface 82b of the polarizing plate 82 are parallel to the XY plane. The incident surface 82a of the polarizing plate 82 is in contact with the exit surface 62b of the pixel electrode 62.

[0039] The condensing lens 85 is disposed on the optical path of the image light IM2 emitted from the emission-side polarizing plate 80. The condensing lens 85 is disposed on the +Z side of the emission-side polarizing plate 80, and is disposed at a distance from the emission-side polarizing plate 80 along the Z axis. The image light IM2 between the emission-side polarizing plate 80 and the condensing lens 85 travels along the Z axis and is not deflected. Therefore, the condensing lens 85 is disposed within the same range as the emission-side polarizing plate 80 on the X axis and Y axis. The condensing lens 85 emits the incident image light IM2 to the +Z side along the Z axis, and condenses the image light IM2 on the optical axis AX.

[0040] The condenser lens 85 is composed of, for example, a Fresnel lens 87. The centers of the Fresnel lens 87 in the X-axis and Y-axis are located on the optical axis AX. The entrance surface 87a of the Fresnel lens 87 is a flat surface parallel to the XY plane. The exit surface 87b of the Fresnel lens 87 is a surface obtained by removing the equiphase component of the lens curved surface designed in accordance with the beam diameter and intensity distribution of the image light IM2, and the distance in the Z-axis from the exit surface 87b to the image light IM2 in the projection optical system 90. When viewed along the Z-axis, the exit surface 87b has the surfaces obtained as described above arranged concentrically in the XY plane. In the Fresnel lens 87, the difference between the inner diameter and the outer diameter of the lens curved surface divided by the thickness of the equiphase component centered on the optical axis AX becomes smaller as it moves away from the optical axis AX in the radial direction.

[0041] As described above, the condenser lens 85 is configured by an optical element capable of condensing the image light IM2, and may be configured by a biconvex lens or an aspheric lens instead of the Fresnel lens 87, for example. The beam area of ​​the image light IM2 incident on the condenser lens 85 includes the modulation area of ​​the light modulation device 50 in the XY plane. In light of this, the condenser lens 85 has a diameter equal to or larger than the dimensions of the modulation area of ​​the light modulation device 50 in the X-axis and Y-axis. By using the Fresnel lens 87 as the condenser lens 85, the thickness of the condenser lens 85 in the Z-axis is appropriately suppressed.

[0042] The projection optical system 90 is disposed on the optical path of the image light IM2 focused on the optical axis AX by the focusing lens 85. The projection optical system 90 is disposed on the +Z side of the focusing lens 85 and is spaced apart from the focusing lens 85 on the Z axis. The projection optical system 90 projects the image light IM2 focused by the focusing lens 85 to the +Z side along the Z axis, and displays it in an enlarged form on a screen (not shown) or the like.

[0043] The projection optical system 90 has, for example, a plano-convex lens 91, a biconcave lens 92, and a biconvex lens 93. The centers of the plano-convex lens 91 on the X-axis and Y-axis, the centers of the biconcave lens 92 on the X-axis and Y-axis, and the centers of the biconvex lens 93 on the X-axis and Y-axis are arranged on the optical axis AX. The entrance surface of the plano-convex lens 91 is a curved surface convex toward the -Z side. The exit surface of the plano-convex lens 91 is a flat surface parallel to the XY plane. The entrance surface of the biconcave lens 92 is a curved surface concave toward the +Z side. The exit surface of the biconcave lens 92 is a curved surface concave toward the -Z side. The entrance surface of the biconvex lens 93 is a curved surface convex toward the -Z side. The exit surface of the biconvex lens 93 is a curved surface convex toward the +Z side. The shapes of the entrance surface and the exit surface of each of the plano-convex lens 91, the biconcave lens 92, and the biconvex lens 93 are appropriately designed to suit the radiation characteristics, spread angle, and divergence of the image light IM2 entering the projection optical system 90, the distance between the projection optical system 90 and the display surface of the screen on the Z axis, and the magnification of the image light IM2 when projected from the projection optical system 90 onto the screen.

[0044] As described above, the projection optical system 90 is configured with optical elements capable of magnifying and projecting the incident image light IM2 at a predetermined magnification, and may have another optical lens instead of at least one of the plano-convex lens 91, the biconcave lens 92, and the biconvex lens 93. The projection optical system 90 may be configured with one optical lens, or may be configured with four or more optical lenses. Examples of optical lenses include a plano-convex lens, a plano-concave lens, a biconvex lens, a biconcave lens, a meniscus lens, an aspheric lens, and a free curved lens.

[0045] Next, the relative arrangement of the blue filter 54B, green filter 54G, red filter 54R, and light-shielding area 56 of the color filter 52 in relation to the first lens, second lens, and third lens of the lens array 40 in the above-mentioned projector 301, and the relative arrangement of the blue subpixel electrode 66B, green subpixel electrode 66G, and red subpixel electrode 66R of the multiple pixels 64 of the pixel electrode 62 will be described.

[0046] 2 is a schematic diagram of the lens array 40 and the color filter 52 of the light modulation device 50, and is a front view of the lens array 40 and the color filter 52 as viewed from the -Z side along the Z axis. However, in order to clearly show the configuration of the color filter 52, the periphery of the microlens 42 of the lens array 40 is indicated by a two-dot chain line in FIG.

[0047] As shown in FIG. 2, the shape of each of the red filter 54R, the green filter 54G, and the blue filter 54B of the color filter 52 when viewed along the Z axis is rectangular. The widths of the red filter 54R, the green filter 54G, and the blue filter 54B on the X axis are equal to each other and are x1. The widths of the red filter 54R, the green filter 54G, and the blue filter 54B on the Y axis are equal to each other and are y1. The width y1 is larger than the width x1, for example, 140% to 180% of the width x1. In this specification, the "width on the X axis" means the dimension on an axis parallel to the X axis, and the "width on the Y axis" means the dimension on an axis parallel to the Y axis.

[0048] In the color filter 52, a plurality of red filters 54R, a plurality of green filters 54G, and a plurality of blue filters 54B are arranged in a so-called stripe pattern.

[0049] Specifically, a red filter 54R, a green filter 54G, and a blue filter 54B form a set, and a plurality of sets are arranged in one row from the -X side to the +X side along the X axis. A plurality of rows are arranged along the Y axis. In each row, the red filter 54R, the green filter 54G, and the blue filter 54B are arranged in sequence on the X axis at an interval of width x2. That is, filters adjacent to each other on the X axis are filters of different colors. In each row, the peripheral edge of the red filter 54R on the +Y side parallel to the X axis, the peripheral edge of the green filter 54G on the +Y side parallel to the X axis, and the peripheral edge of the blue filter 54B on the +Y side parallel to the X axis are aligned at the same position on the Y axis. In each row, the peripheral edge of the -Y side parallel to the X axis of the red filter 54R, the peripheral edge of the -Y side parallel to the X axis of the green filter 54G, and the peripheral edge of the -Y side parallel to the X axis of the blue filter 54B are aligned at the same position as each other on the Y axis.

[0050] On the other hand, the red filters 54R, the green filters 54G, and the blue filters 54B are arranged in a single vertical column along the Y axis, and are arranged in multiple vertical columns along the X axis. In each vertical column, the red filters 54R, the green filters 54G, and the blue filters 54B of any one of the colors are arranged at an interval of width y2 on the Y axis. In other words, the filters adjacent to each other on the Y axis are filters of the same color. The width y2 is greater than the width x2, and is, for example, 120% to 160% of the width x2.

[0051] In a row in which a plurality of red filters 54R are arranged, the -X side peripheral ends parallel to the Y axis of the red filters 54R adjacent to each other on the Y axis are aligned to the same position on the X axis. The +X side peripheral ends parallel to the Y axis of the red filters 54R adjacent to each other on the Y axis are aligned to the same position on the X axis. In a row in which a plurality of green filters 54G are arranged, the -X side peripheral ends parallel to the Y axis of the green filters 54G adjacent to each other on the Y axis are aligned to the same position on the X axis. The +X side peripheral ends parallel to the Y axis of the green filters 54G adjacent to each other on the Y axis are aligned to the same position on the X axis. In a row in which a plurality of blue filters 54B are arranged, the -X side peripheral ends parallel to the Y axis of the blue filters 54B adjacent to each other on the Y axis are aligned to the same position on the X axis. The +X side peripheral ends parallel to the Y axis of the blue filters 54B adjacent to each other on the Y axis are aligned to the same position on the X axis.

[0052] The light-shielding regions 56 are provided in regions of width x2 between the red filter 54R and the green filter 54G, between the green filter 54G and the blue filter 54B, and between the blue filter 54B and the red filter 54R, which are adjacent to each other on the X-axis. The light-shielding regions 56 are provided in regions of width y2 between the red filters 54R, between the green filters 54G, and between the blue filters 54B, which are adjacent to each other on the Y-axis. The light-shielding regions 56 are also provided in regions on the outer periphery adjacent to any of the red filters 54R, the green filters 54G, and the blue filters 54B, which are arranged on the outer periphery of the color filter 52 when viewed along the Z-axis, among the multiple red filters 54R, the multiple green filters 54G, and the multiple blue filters 54B.

[0053] The multiple microlenses 42 of the lens array 40 include a first lens 44B, a second lens 44G, and a third lens 44R. The first lens 44B emits the incident white light WL2 toward the blue filter 54B of the color filter 52. The second lens 44G emits the incident white light WL2 toward the green filter 54G of the color filter 52. The third lens 44R emits the incident white light WL2 toward the red filter 54R of the color filter 52.

[0054] In the lens array 40, a third lens 44R, a second lens 44G, and a first lens 44B form a set, and a plurality of sets are arranged in one row from the -X side to the +X side along the X axis. A plurality of rows are arranged along the Y axis. In each row, the third lens 44R, the second lens 44G, and the first lens 44B are adjacent to each other without any gaps along the X axis. A plurality of third lenses 44R, a plurality of second lenses 44G, and a plurality of first lenses 44B are arranged in a row along the Y axis, and are arranged to form a plurality of rows along the X axis. In each row, filters of any one of the red filters 54R, the green filters 54G, and the blue filters 54B are adjacent to each other without any gaps along the Y axis.

[0055] The second lens 44G is provided corresponding to the green filter 54G of the color filter 52. The total number of the second lenses 44G in the lens array 40 is the same as the total number of the green filters 54G in the color filter 52, and is the same as the total number of the green subpixel electrodes 66G included in the multiple pixels 64 of the pixel electrode 62. The second lens 44G overlaps at least the green filter 54G when viewed along the Z axis, and is larger than the green filter 54G in the X axis and Y axis. In the following, the green filter 54G corresponding to the second lens 44G means the green filter 54G of the multiple green filters 54G of the color filter 52, at least a part of which overlaps with the second lens 44G when viewed along the Z axis.

[0056] The shape of the second lens 44G when viewed along the Z axis is rectangular. The -X side peripheral edge of the second lens 44G parallel to the Y axis is disposed on the -X side of the corresponding green filter 54G parallel to the Y axis. The -X side peripheral edge of the second lens 44G parallel to the Y axis is disposed in the area of ​​the red filter 54R adjacent to the corresponding green filter 54G across the light-shielding area 46 on the X axis and on the -X side of the corresponding green filter 54G. The distance on the X axis between the -X side peripheral edge of the second lens 44G parallel to the Y axis and the +X side peripheral edge of the red filter 54R adjacent to the green filter 54G corresponding to the second lens 44G on the -X side is d1.

[0057] The +X side peripheral edge of the second lens 44G parallel to the Y axis is disposed on the +X side of the +X side peripheral edge of the corresponding green filter 54G parallel to the Y axis. The +X side peripheral edge of the second lens 44G parallel to the Y axis is disposed in a region of the blue filter 54B adjacent to the corresponding green filter 54G on the X axis across the light-shielding region 46 and on the +X side of the corresponding green filter 54G. The distance on the X axis between the +X side peripheral edge of the second lens 44G parallel to the Y axis and the -X side peripheral edge parallel to the Y axis of the blue filter 54B adjacent on the +X side to the green filter 54G corresponding to the second lens 44G is d1.

[0058] The +Y side peripheral edge of second lens 44G parallel to the X axis is disposed on the +Y side of the +Y side peripheral edge of corresponding green filter 54G parallel to the X axis. The +Y side peripheral edge of second lens 44G parallel to the X axis is disposed in light-shielding region 56 adjacent to corresponding green filter 54G on the Y axis and on the +Y side of corresponding green filter 54G. The distance on the Y axis between the +Y side peripheral edge of second lens 44G parallel to the X axis and the +Y side peripheral edge of green filter 54G corresponding to second lens 44G parallel to the X axis is d2.

[0059] The -Y side peripheral edge of the second lens 44G parallel to the X axis is disposed on the -Y side of the corresponding green filter 54G parallel to the X axis. The -Y side peripheral edge of the second lens 44G parallel to the X axis is disposed in a light-shielding region 56 adjacent to the corresponding green filter 54G on the Y axis and on the -Y side of the corresponding green filter 54G. The distance on the Y axis between the -Y side peripheral edge of the second lens 44G parallel to the X axis and the -Y side peripheral edge of the green filter 54G corresponding to the second lens 44G parallel to the X axis is d2. The distance d2 is approximately 50% of the width y2.

[0060] The width XG of the second lens 44G on the X axis is XG = (x1) + 2 × (x2) + 2 × (d1). The width YG of the second lens 44G on the Y axis is YG = (y1) + 2 × (d2) = (y1) + 2 × (y2 / 2) = (y1) + (y2).

[0061] The area of ​​the entrance surface 44a and the area of ​​the exit surface 44b of the second lens 44G are larger than the area of ​​the entrance surface 54a and the area of ​​the exit surface 54b of the corresponding green filter 54G, and are also larger than the area of ​​the entrance surface 54a and the area of ​​the exit surface 54b of the red filter 54R and the blue filter 54B adjacent to the corresponding green filter 54G on the X-axis.

[0062] The third lens 44R is provided corresponding to the red filter 54R of the color filter 52. The total number of the third lenses 44R in the lens array 40 is the same as the total number of the red filters 54R in the color filter 52, and is the same as the total number of the red subpixel electrodes 66R included in the multiple pixels 64 of the pixel electrode 62. When viewed along the Z axis, the third lens 44R overlaps a part of the red filter 54R, for example, overlaps with a part of the red filter 54R on the -X side. In the following, the red filter 54R corresponding to the third lens 44R means a red filter 54R of the multiple red filters 54R of the color filter 52, at least a part of which overlaps with the third lens 44R when viewed along the Z axis.

[0063] The shape of the third lens 44R when viewed along the Z axis is rectangular. The peripheral edge of the third lens 44R on the -X side parallel to the Y axis is disposed on the -X side of the peripheral edge of the corresponding red filter 54R on the -X side parallel to the Y axis. The peripheral edge of the third lens 44R on the -X side parallel to the Y axis overlaps with the light-shielding region 56 that is adjacent to the corresponding red filter 54R on the X axis and disposed on the -X side of the corresponding red filter 54R when viewed along the Z axis. The distance on the X axis between the peripheral edge of the third lens 44R on the -X side parallel to the Y axis and the peripheral edge of the red filter 54R on the -X side parallel to the Y axis corresponding to the third lens 44R is d3. The distance d3 is about 50% of the width x2.

[0064] The +X side edge of the third lens 44R parallel to the Y axis is disposed between the -X side edge and the +X side edge of the corresponding red filter 54R parallel to the Y axis on the X axis, and overlaps with the corresponding red filter 54R when viewed along the Z axis. The +X side edge of the third lens 44R parallel to the Y axis overlaps with the light-shielding region 56 on the +X side of the center of the corresponding red filter 54R on the X axis when viewed along the Z axis. The +X side edge of the third lens 44R parallel to the Y axis overlaps with the -X side edge of the second lens 44G parallel to the Y axis that is adjacent to the second lens 44G on the +X side on the X axis.

[0065] The +Y side peripheral edge of the third lens 44R parallel to the X axis is disposed on the +Y side of the corresponding red filter 54R parallel to the X axis. The +Y side peripheral edge of the third lens 44R parallel to the X axis is disposed at the same position on the Y axis as the +Y side peripheral edge of the second lens 44G parallel to the X axis. The -Y side peripheral edge of the third lens 44R parallel to the X axis is disposed on the -Y side of the corresponding red filter 54R parallel to the X axis. The -Y side peripheral edge of the third lens 44R parallel to the X axis is disposed at the same position on the Y axis as the -Y side peripheral edge of the second lens 44G parallel to the X axis.

[0066] The width XR of the third lens 44R on the X axis is XR={(x1)-(d1)}+(d3)={(x1)-(d1)}+(x2 / 2), which is smaller than the width XG of the second lens 44G. The width YR of the third lens 44R on the Y axis is YR=YG=(y1)+2×(d2)=(y1)+2×(y2 / 2)=(y1)+(y2), which is the same as the width YG of the second lens 44G.

[0067] The first lens 44B is provided corresponding to the blue filter 54B of the color filter 52. The total number of the first lenses 44B in the lens array 40 is the same as the total number of the blue filters 54B in the color filter 52, and is the same as the total number of the blue subpixel electrodes 66B included in the multiple pixels 64 of the pixel electrode 62. When viewed along the Z axis, the first lens 44B overlaps with a part of the blue filter 54B, for example, with a part of the blue filter 54B on the -X side. In the following, the blue filter 54B corresponding to the first lens 44B means the blue filter 54B that partially overlaps with the first lens 44B among the multiple blue filters 54B of the color filter 52 when viewed along the Z axis.

[0068] The shape of the first lens 44B when viewed along the Z axis is rectangular. The -X side peripheral edge of the first lens 44B parallel to the Y axis is disposed between the -X side peripheral edge and the +X side peripheral edge of the corresponding blue filter 54B parallel to the Y axis on the X axis, and overlaps with the corresponding blue filter 54B when viewed along the Z axis. The -X side peripheral edge of the first lens 44B parallel to the Y axis overlaps with the light-shielding region 56 on the -X side of the center on the X axis of the corresponding blue filter 54B when viewed along the Z axis. The -X side peripheral edge of the first lens 44B parallel to the Y axis overlaps with the +X side peripheral edge parallel to the Y axis of the second lens 44G adjacent to the -X side on the X axis.

[0069] The +X side peripheral edge of the first lens 44B parallel to the Y axis is disposed on the +X side of the +X side peripheral edge of the corresponding blue filter 54B parallel to the Y axis. When viewed along the Z axis, the +X side peripheral edge of the first lens 44B parallel to the Y axis overlaps with a light-shielding region 56 that is adjacent to the corresponding blue filter 54B on the X axis and disposed on the +X side of the corresponding blue filter 54B. The distance on the X axis between the +X side peripheral edge of the first lens 44B parallel to the Y axis and the +X side peripheral edge of the blue filter 54B corresponding to the first lens 44B parallel to the Y axis is d3.

[0070] The +Y side peripheral edge of the first lens 44B parallel to the X axis is disposed on the +Y side of the corresponding blue filter 54B parallel to the X axis. The +Y side peripheral edge of the first lens 44B parallel to the X axis is disposed at the same position on the Y axis as the +Y side peripheral edge of the second lens 44G parallel to the X axis. The -Y side peripheral edge of the first lens 44B parallel to the X axis is disposed on the -Y side of the corresponding blue filter 54B parallel to the X axis. The -Y side peripheral edge of the first lens 44B parallel to the X axis is disposed at the same position on the Y axis as the -Y side peripheral edge of the second lens 44G parallel to the X axis.

[0071] The width XB of the first lens 44B on the X-axis is XB={(x1)-(d1)}+(d3)={(x1)-(d1)}+(x2 / 2), which is smaller than the width XG of the second lens 44G and is the same as the width XR of the third lens 44R. The width YB of the first lens 44B on the Y-axis is YB=YG=(y1)+2×(d2)=(y1)+2×(y2 / 2)=(y1)+(y2), which is the same as the width YG of the second lens 44G and the width YR of the third lens 44R.

[0072] The area of ​​the entrance surface 44a and the exit surface 44b of the second lens 44G are larger than the area of ​​the entrance surface 44a and the area of ​​the exit surface 44b of the first lens 44B and the area of ​​the entrance surface 44a and the area of ​​the exit surface 44b of the third lens 44R.

[0073] 3 is a schematic diagram of the lens array 40 and the color filter 52 and pixel electrode 62 of the light modulation device 50, and is a cross-sectional view taken along the C1-C1 line in FIG. 2. As shown in FIG. 3, the red subpixel electrodes 66R included in the pixels 64 of the pixel electrode 62 overlap with the red filters 54R of the color filter 52 when viewed along the Z axis. The red subpixel electrodes 66R are disposed at the same positions as the red filters 54R in the XY plane. The shape and area of ​​the entrance surface 66a and the exit surface 66b of the red subpixel electrode 66R when viewed along the Z axis are the same as the shape and area of ​​the entrance surface 54a and the exit surface 54b of the red filter 54R.

[0074] The green subpixel electrodes 66G included in the multiple pixels 64 of the pixel electrode 62 overlap with the green filters 54G of the color filter 52 when viewed along the Z axis. The multiple green subpixel electrodes 66G are disposed at the same positions as the multiple green filters 54G in the XY plane. The shape and area of ​​the entrance surface 66a and the exit surface 66b of the green subpixel electrode 66G are the same as the shape and area of ​​the entrance surface 54a and the exit surface 54b of the green filter 54G when viewed along the Z axis.

[0075] The blue subpixel electrodes 66B included in the multiple pixels 64 of the pixel electrode 62 overlap with the blue filters 54B of the color filter 52 when viewed along the Z axis. The multiple blue subpixel electrodes 66B are disposed at the same positions as the multiple blue filters 54B in the XY plane. The shape and area of ​​the entrance surface 66a and the exit surface 66b of the blue subpixel electrode 66B are the same as the shape and area of ​​the entrance surface 54a and the exit surface 54b of the blue filter 54B when viewed along the Z axis.

[0076] In the pixel electrode 62, a wiring region 68 is provided between any of the subpixel electrodes, the red subpixel electrode 66R, the green subpixel electrode 66G, and the blue subpixel electrode 66B, along the X-axis and Y-axis. In the wiring region 68, wiring, circuits, and the like are formed for driving any of the subpixel electrodes, the red subpixel electrode 66R, the green subpixel electrode 66G, and the blue subpixel electrode 66B, in accordance with an electric signal supplied from an image output device (not shown) via a circuit board, as described above. The wiring region 68 overlaps with the light-shielding region 56 of the color filter 52 when viewed along the Z-axis. Therefore, the white light WL2 is not irradiated onto the wiring region 68.

[0077] A pixel 64 of the light modulation device 50 has a set of red filter 54R, green filter 54G, and blue filter 54B arranged along the X-axis in the color filter 52, a light-shielding region 56 between the red filter 54R and the green filter 54G adjacent to each other on the X-axis, a light-shielding region 56 between the green filter 54G and the blue filter 54B, and a light-shielding region 56 surrounding the set of red filter 54R, green filter 54G, and blue filter 54B along the X-axis and Y-axis when viewed along the Z-axis. In one pixel 64, the width of the light-shielding region 56 extending along the X-axis and contacting the set of red filter 54R, green filter 54G, and blue filter 54B from the +Y side and the -Y side is (y2 / 2). In one pixel 64, the width of the light-shielding region 56 extending along the Y-axis and contacting the red filter 54R from the -X side is (x2 / 2). In one pixel 64, the width on the X axis of the light-shielding region 56 that contacts the blue filter 54B from the +X side and extends along the Y axis is (x2 / 2).

[0078] When viewed along the Z axis, one pixel 64 of the light modulation device 50 has components of the pixel electrode 62 in an area that overlaps with the above-mentioned components constituting one pixel 64 in the color filter 52. That is, one pixel 64 has a red subpixel electrode 66R, a green subpixel electrode 66G, and a blue subpixel electrode 66B corresponding to a set of a red filter 54R, a green filter 54G, and a blue filter 54B arranged along the X axis, and a wiring region 68 that overlaps with the light-shielding region 56 of the pixel 64 when viewed along the Z axis.

[0079] In the X-axis, the incident surface 44a, i.e., the lens surface, of the second lens 44G of the lens array 40 focuses the green light GL included in the incident white light WL2 at a focusing point MG of the green subpixel electrode 66G of the pixel 64. The focusing point MG is set, for example, at the center of the green subpixel electrode 66G in the X-axis, Y-axis, and Z-axis.

[0080] The white light WL2 is incident on the second lens 44G within a range of width XG centered on the light collecting point MG on the X axis. The entrance surface 44a of the second lens 44G is, for example, a curved surface that is convex on the -Z side with the same position as the light collecting point MG on the X axis as the apex, and is a curved surface designed according to the separation distance PL on the Z axis between the principal point HG on the +Z side of the apex and the light collecting point MG. The principal point HG of the second lens 44G is disposed on the principal surface of the second lens 44G. The principal surface of the second lens 44G exists between the apex of the entrance surface 44a of the second lens 44G and the exit surface 44b of the second lens 44G on the Z axis, and is parallel to the XY plane. The principal point HG is disposed at the same position as the center of the green subpixel electrode 66G corresponding to the second lens 44G on the X axis.

[0081] The separation distance PL is designed taking into consideration the width XG of the second lens 44G, the width x1 of the green filter 54G and the green subpixel electrode 66G, and the thicknesses of the green filter 54G and the green subpixel electrode 66G in the Z axis. The separation distance PL is appropriately designed so that the beam width in the X axis of the white light WL2 that is collected by the second lens 44G and irradiated onto the incident surface 54a of the green filter 54G is smaller than the width x1.

[0082] Of the white light WL2 incident on the green filter 54G from the incident surface 54a, only the green light GL passes through the green filter 54G, exits from the exit surface 54b of the green filter 54G, enters the green subpixel electrode 66G from the incident surface 66a, and is focused at a focusing point MG. As described above, the beam width of the white light WL2 on the X-axis at the incident surface 54a of the green filter 54G is smaller than the width x1, thereby reducing the loss of the white light WL2 incident on the green filter 54G and the loss of the green light GL focused on the green subpixel electrode 66G.

[0083] When viewed along the Z axis, the apex of the entrance surface 44a of the second lens 44G and the light-focusing point MG of the green subpixel electrode 66G are located at the center of the width XG of the second lens 44G on the X axis. Therefore, the second lens 44G is not decentered on the X axis. The exit surface 44b of the second lens 44G is located on the +Z side of the entrance surface 44a of the second lens 44G and is a flat surface parallel to the XY plane.

[0084] In the X-axis, the incident surface 44a, i.e., the lens surface, of the third lens 44R of the lens array 40 focuses the red light RL included in the incident white light WL2 at a focusing point MR of the red subpixel electrode 66R of the pixel 64. The focusing point MR is set, for example, at the center of the red subpixel electrode 66R in the X-axis, Y-axis, and Z-axis.

[0085] The white light WL2 is incident on the third lens 44R within a range of width XR on the X axis. The focal point MR of the red subpixel electrode 66R is located on the +X side of the center of the width XR of the third lens 44R on the X axis. The incident surface 44a of the third lens 44R is, for example, a curved surface that is convex on the -Z side with the same position as the focal point MR as the apex on the X axis, and is a curved surface designed according to the central wavelength of the red light and the distance PL on the Z axis between the principal point HR on the +Z side of the apex and the focal point MR. The incident surface 44a of the third lens 44R is designed taking into consideration the width XR of the third lens 44R, the width x1 of the red filter 54R and the red subpixel electrode 66R, the thickness of the red filter 54R and the red subpixel electrode 66R on the Z axis, and the distance PL. The principal point HR of the third lens 44R is located on the main surface of the third lens 44R. The principal surface of the third lens 44R is located between the vertex of the entrance surface 44a of the third lens 44R and the exit surface 44b of the third lens 44R on the Z axis, and is parallel to the XY plane. The principal point HR is located at the same position on the X axis as the center of the red subpixel electrode 66R corresponding to the third lens 44R.

[0086] The beam width on the X-axis of the white light WL2 collected by the third lens 44R and irradiated on the entrance surface 54a of the red filter 54R is smaller than the width x1. Of the white light WL2 incident on the red filter 54R from the entrance surface 54a, only the red light RL passes through the red filter 54R, exits from the exit surface 54b of the red filter 54R, enters the red subpixel electrode 66R from the entrance surface 66a, and is collected at the collection point MR. As described above, because the beam width on the X-axis of the white light WL2 on the entrance surface 54a of the red filter 54R is smaller than the width x1, the loss of the white light WL2 incident on the red filter 54R and the loss of the red light RL collected on the red subpixel electrode 66R are reduced.

[0087] When viewed along the Z axis, the apex of the entrance surface 44a of the third lens 44R and the light-focusing point MR of the red subpixel electrode 66R are shifted toward the +X side from the center of the width XR of the third lens 44R on the X axis. Therefore, the third lens 44R is decentered on the X axis. The exit surface 44b of the third lens 44R is located on the +Z side of the entrance surface 44a of the third lens 44R, and is a flat surface parallel to the XY plane.

[0088] In the X-axis, the incident surface 44a, i.e., the lens surface, of the first lens 44B of the lens array 40 focuses the blue light BL contained in the incident white light WL2 at a focusing point MB of the blue subpixel electrode 66B of the pixel 64. The focusing point MB is set, for example, at the center of the blue subpixel electrode 66B in the X-axis, Y-axis, and Z-axis.

[0089] The white light WL2 is incident on the first lens 44B within a range of width XB on the X axis. The light-focusing point MB of the blue subpixel electrode 66B is located on the -X side of the center of the width XB of the first lens 44B on the X axis. The entrance surface 44a of the first lens 44B is, for example, a curved surface that is convex on the -Z side with the same position as the light-focusing point MB as the apex on the X axis, and is a curved surface designed according to the central wavelength of the blue light and the distance PL on the Z axis between the principal point HB on the +Z side of the apex. The entrance surface 44a of the first lens 44B is designed in consideration of the width XB of the first lens 44B, the width x1 of the blue filter 54B and the blue subpixel electrode 66B, the thickness of the blue filter 54B and the blue subpixel electrode 66B on the Z axis, and the distance PL. The principal point HB of the first lens 44B is located on the main surface of the first lens 44B. The principal surface of the first lens 44B is located between the vertex of the entrance surface 44a of the first lens 44B and the exit surface 44b of the first lens 44B on the Z axis, and is parallel to the XY plane. The principal point HB is located at the same position on the X axis as the center of the blue subpixel electrode 66B corresponding to the first lens 44B.

[0090] The beam width on the X-axis of the white light WL2 collected by the first lens 44B and irradiated on the entrance surface 54a of the blue filter 54B is smaller than the width x1. Of the white light WL2 incident on the blue filter 54B from the entrance surface 54a, only the blue light BL passes through the blue filter 54B, exits from the exit surface 54b of the blue filter 54B, enters the blue subpixel electrode 66B from the entrance surface 66a, and is collected at the collection point MB. As described above, because the beam width on the X-axis of the white light WL2 on the entrance surface 54a of the blue filter 54B is smaller than the width x1, the loss of the white light WL2 incident on the blue filter 54B and the loss of the blue light BL collected on the blue subpixel electrode 66B are reduced.

[0091] Furthermore, the transmittance of green light GL through the green filter 54G is at least higher than the transmittance of red light RL through the red filter 54R and the transmittance of blue light BL through the blue filter 54B, and is equivalent to the transmittance of red light RL through the red filter 54R and the transmittance of blue light BL through the blue filter 54B.

[0092] Fig. 4 is a schematic diagram of the lens array 40 and the color filter 52 and pixel electrode 62 of the light modulation device 50, and is a cross-sectional view taken along the C2-C2 line in Fig. 2. As shown in Fig. 4, the entrance surface 44a of the second lens 44G is, for example, a curved surface that is convex toward the -Z side with the apex at the same position as the light collection point MG on the Y axis, and is a curved surface that is set according to the central wavelength of the green light GL and the separation distance PL. The principal point HG of the second lens 44G is located at the same position on the Y axis as the center of the green subpixel electrode 66G corresponding to the second lens 44G.

[0093] The beam width in the Y axis of the white light WL2 collected by the second lens 44G and irradiated on the entrance surface 54a of the green filter 54G is smaller than y1. Only the green light GL of the white light WL2 incident on the green filter 54G from the entrance surface 54a passes through the green filter 54G, exits from the exit surface 54b of the green filter 54G, enters the green subpixel electrode 66G from the entrance surface 66a, and is collected at the collection point MG. As described above, the beam width in the Y axis of the white light WL2 on the entrance surface 54a of the green filter 54G is smaller than y1, so that the loss of the white light WL2 incident on the green filter 54G and the loss of the blue light BL collected on the green subpixel electrode 66G are reduced.

[0094] When viewed along the Z axis, the apex of the incident surface 44a of the second lens 44G and the light-collecting point MG of the green subpixel electrode 66G are disposed at the center of the width YG of the second lens 44G in the Y axis. Therefore, the second lens 44G is not decentered in the Y axis either.

[0095] Although not shown, in the Y axis, the incident surface 44a of the third lens 44R is, for example, a curved surface that has a convex shape toward the -Z side with the apex at the same position as the light collection point MR and is set according to the central wavelength of the red light RL and the separation distance PL. The principal point HR of the third lens 44R is disposed in the same position on the Y axis as the center of the red subpixel electrode 66R corresponding to the third lens 44R. Also in the Y axis, of the white light WL2 incident on the red filter 54R from the incident surface 54a, only the red light RL passes through the red filter 54R, enters the red subpixel electrode 66R, and is collected at the light collection point MR.

[0096] The width of the beam of the white light WL2 in the Y axis that is collected by the third lens 44R and irradiated onto the incident surface 54a of the red filter 54R is smaller than y1. Also in the Y axis, the loss of the white light WL2 that enters the red filter 54R and the loss of the red light RL that is collected on the red subpixel electrode 66R are reduced.

[0097] When viewed along the Z axis, the vertex of the incident surface 44a of the third lens 44R and the light-collecting point MR of the red subpixel electrode 66R are disposed at the center of the width YR of the third lens 44R in the Y axis. Therefore, the third lens 44R has no decentering in the Y axis.

[0098] In addition, in the Y axis, the entrance surface 44a of the first lens 44B is a curved surface that is convex toward the -Z side with the apex at the same position as the light-converging point MB, and is set according to the central wavelength of the blue light BL and the separation distance PL. The principal point HB of the first lens 44B is disposed in the same position on the Y axis as the center of the blue subpixel electrode 66B corresponding to the first lens 44B. In the Y axis as well, of the white light WL2 incident on the blue filter 54B from the entrance surface 54a, only the blue light BL passes through the blue filter 54B, enters the blue subpixel electrode 66B, and is converged at the light-converging point MR.

[0099] The width of the beam of the white light WL2 in the Y axis that is collected by the first lens 44B and irradiated onto the incident surface 54a of the blue filter 54B is smaller than y1. Also in the Y axis, the loss of the white light WL2 that is incident on the red filter 54R and the loss of the red light RL that is collected on the red subpixel electrode 66R are reduced.

[0100] When viewed along the Z axis, the apex of the incident surface 44a of the first lens 44B and the light-collecting point MB of the blue subpixel electrode 66B are disposed at the center of the width YB of the first lens 44B in the Y axis. Therefore, the first lens 44B has no decentering in the Y axis.

[0101] FIG. 5 is a perspective view of the lens array 40. In FIG. 5, the red filter 54R, the green filter 54G, and the blue filter 54B of the color filter 52 are indicated by two-dot chain lines. The component parallel to the X-axis at the entrance surface 44a of the second lens 44G of the lens array 40 is designed to have an effective aperture of width XG and a focal length of a distance PL between the principal point HG of the second lens 44G and the light condensing point MG of the green subpixel electrode 66G on the Z-axis (not shown). The component parallel to the Y-axis at the entrance surface 44a of the second lens 44G is designed to have an effective aperture of width YG larger than width XG and a focal length of a distance PL between the principal point HG and the light condensing point MG on the Z-axis. Therefore, the numerical aperture (NA) of the entrance surface 44a of the second lens 44G when viewed in cross section along the Y-axis is larger than the numerical aperture of the entrance surface 44a of the second lens 44G when viewed in cross section along the X-axis.

[0102] The component parallel to the X-axis at the entrance surface 44a of the third lens 44R of the lens array 40 is designed to have an effective aperture of width XR smaller than the width XG of the second lens 44G, and a focal length of the distance PL on the Z-axis between the principal point HR of the third lens 44R (not shown) and the light-focusing point MR of the red subpixel electrode 66R. The component parallel to the Y-axis at the entrance surface 44a of the third lens 44R is designed to have an effective aperture of width YR larger than the width XR, and a focal length of the distance PL on the Z-axis between the principal point HR and the light-focusing point MR. Therefore, the numerical aperture of the entrance surface 44a of the third lens 44R when viewed in cross section along the X-axis is smaller than the numerical aperture of the entrance surface 44a of the second lens 44G when viewed in cross section along the X-axis. The numerical aperture of the entrance surface 44a of the third lens 44R when viewed in cross section along the Y axis is larger than the numerical aperture of the entrance surface 44a of the third lens 44R when viewed in cross section along the X axis, and is equivalent to the numerical aperture of the entrance surface 44a of the second lens 44G when viewed in cross section along the Y axis.

[0103] The component parallel to the X-axis at the entrance surface 44a of the first lens 44B of the lens array 40 is designed to have an effective aperture of width XB smaller than the width XG of the second lens 44G, and a focal length of the distance PL on the Z-axis between the principal point HB of the first lens 44B (not shown) and the light-focusing point MB of the blue subpixel electrode 66B. The component parallel to the Y-axis at the entrance surface 44a of the first lens 44B is designed to have an effective aperture of width YB larger than the width XB, and a focal length of the distance PL on the Z-axis between the principal point HB and the light-focusing point MB. Therefore, the numerical aperture of the entrance surface 44a of the first lens 44B when viewed in cross section along the X-axis is smaller than the numerical aperture of the entrance surface 44a of the second lens 44G when viewed in cross section along the X-axis. The numerical aperture of the entrance surface 44a of the first lens 44B when viewed in cross section along the Y axis is larger than the numerical aperture of the entrance surface 44a of the first lens 44B when viewed in cross section along the X axis, and is equivalent to the numerical aperture of the entrance surface 44a of the second lens 44G when viewed in cross section along the Y axis.

[0104] The white light WL2 incident on the lens array 40 is collimated by the collimating lens 25. In the XY plane, the amount of white light WL2 per unit area is approximately uniform. The width XG of the second lens 44G of the lens array 40 is larger than the width XB of the first lens 44B and the width XR of the third lens 44R. The width YG of the second lens 44G is equal to the width YB of the first lens 44B and the width YR of the third lens 44R. Therefore, the amount of white light WL2 taken into the second lens 44G is larger than the amount of white light WL2 taken into each of the first lens 44B and the third lens 44R. The difference in the amount of white light WL2 taken into the second lens 44G and the amount of white light WL2 taken into each of the first lens 44B and the third lens 44R depends on the difference between the area of ​​the second lens 44G in the XY plane and the area of ​​each of the first lens 44B and the third lens 44R in the XY plane. In the above-described configuration, the difference in the amount of white light WL2 captured by the second lens 44G and the amount of white light WL2 captured by each of the first lens 44B and the third lens 44R depends on (XG-XB) and (XG-XR).

[0105] The amount of green light GL contained in the white light WL2 is equal to or greater than the amounts of red light RL and blue light BL. Therefore, the amount of green light GL taken into the second lens 44G and collected on the green subpixel electrode 66G is greater than the amount of red light RL taken into the third lens 44R and collected on the red subpixel electrode 66R, and the amount of blue light BL taken into the first lens 44B and collected on the blue subpixel electrode 66B. Therefore, in one pixel 64, the amount of green light GL incident on the green subpixel electrode 66G is greater than the amount of red light RL incident on the red subpixel electrode 66R and the amount of blue light BL incident on the blue subpixel electrode 66B.

[0106] As shown in FIG. 3 and FIG. 4, the green light GL incident on the green subpixel electrode 66G of the pixel electrode 62 is modulated to green image light IG by the switching element as described above. The green image light IG has an intensity and a light amount according to an electrical signal related to the green light GL supplied to the switching element, and is emitted from the emission surface 66b of the green subpixel electrode 66G to the +Z side along the Z axis. Similarly, the red light RL incident on the red subpixel electrode 66R is modulated to red image light IR by the switching element. The red image light IR has an intensity and a light amount according to an electrical signal related to the red light RL supplied to the switching element, and is emitted from the emission surface 66b of the red subpixel electrode 66R to the +Z side along the Z axis. The blue light BL incident on the blue subpixel electrode 66B is modulated to blue image light IB by the switching element. The blue image light IB has an intensity and a light amount according to an electrical signal related to the blue light BL supplied to the switching element, and is emitted from the emission surface 66b of the blue subpixel electrode 66B to the +Z side along the Z axis.

[0107] 1, the image lights IR, IG, and IB emitted from the emission surfaces 66b of the red subpixel electrode 66R, the green subpixel electrode 66G, and the blue subpixel electrode 66B, i.e., the emission surface 62b of the pixel electrode 62, are combined with each other to form a full-color image light IM1. When the intensity of the electric signal when the red light RL is modulated by the red subpixel electrode 66R, the intensity of the electric signal when the green light GL is modulated by the green subpixel electrode 66G, and the intensity of the electric signal when the blue light BL is modulated by the blue subpixel electrode 66B are equivalent to each other, the amount of green image light IG included in the image light IM1 is greater than the amounts of red image light IR and blue image light IB included in the image light IM1.

[0108] As described above, the image light IM1 passes through the exit-side polarizing plate 80 and the condenser lens 85, and is magnified and projected as image light IM2 by the projection optical system 90 toward a screen (not shown), and is displayed on a display surface of the screen that faces the projection optical system 90 on the optical axis AX. In the image or video displayed on the screen, the color balance of the image light IM2 is maintained, so that the amount of green light is relatively greater than the amounts of red and blue light. The viewer views an image or video with a greater amount of green light in accordance with the visual sensitivity, and can visually recognize an image or video that is bright overall.

[0109] Next, we will explain the results of numerical calculations regarding the brightness and white balance of the image light IM1 in relation to the transmittance of red light RL passing through the red filter 54R of the color filter 52, the transmittance of green light GL passing through the green filter 54G, and the transmittance of blue light BL passing through the blue filter 54B.

[0110] The results of the numerical calculations for numerical calculation pattern [1] to numerical pattern [7] are shown in Table 1. For each of the numerical calculation patterns [1] to [7], the peak wavelength of the red light RL was set to 610 nm, the peak wavelength of the green light GL was set to 550 nm, and the peak wavelength of the blue light BL was set to 450 nm.

[0111] [Table 1]

[0112] Numerical calculation pattern [1] is a reference pattern for this numerical calculation example. In numerical calculation pattern [1], it is assumed that the transmittance of red light RL through the red filter 54R, the transmittance of green light GL through the green filter 54G, and the transmittance of blue light BL through the blue filter 54B are equal to each other.

[0113] A reference example in which the transmittance of each color filter of the numerical calculation pattern [1] is realized is, for example, a case in which, in the configuration of the present embodiment described above, the shape and area of ​​each of the first lens 44B, the second lens 44G, and the third lens 44R of the lens array 40 when viewed along the Z axis are equivalent to the blue subpixel electrode 66B, the green subpixel electrode 66G, and the red subpixel electrode 66R corresponding to each lens in the pixel electrode 62. In this case, when viewed along the Z axis, each lens overlaps with the corresponding blue subpixel electrode 66B, the green subpixel electrode 66G, and the red subpixel electrode 66R. In addition, each lens is not decentered in the X axis and the Y axis.

[0114] In numerical calculation pattern [1], when the colored lights transmitted through the red filter 54R, the green filter 54G, and the blue filter 54B are combined, the color temperature of the image light IM1 is calculated to be 8831 [K], and the color deviation of the image light IM1 is calculated to be -0.014.

[0115] The numerical values ​​in the "Red F", "Green F" and "Blue F" columns in Table 1 represent the transmittance of color light through the red filter 54R, the green filter 54G and the blue filter 54B in each numerical pattern when the transmittance of color light through each of the red filter 54R, the green filter 54G and the blue filter 54B assumed in the numerical pattern [1] is 100%. The numerical values ​​in the "Brightness" column in Table 1 represent the brightness of the image light IM1 in each numerical pattern when the brightness of the image light IM1 in the numerical pattern [1] is 100%. Note that for each numerical pattern, the brightness of the image light IM1 is expressed in units of lumens [lm] and converted to a ratio to the brightness of the numerical pattern [1] as described above. "Color temperature" and "color deviation" were used as evaluation values ​​of the white balance of the image light IM1 in each numerical pattern in Table 1. The numerical values ​​in the "Deviation" column in Table 1 represent the color deviation described above.

[0116] In the numerical calculation pattern [2], the transmittance of the red light RL in the red filter 54R is reduced to 90%, the transmittance of the green light GL in the green filter 54G is increased to 106%, and the transmittance of the blue light BL in the blue filter 54B is maintained at 100% compared to the assumption of the numerical calculation pattern [1]. In order to realize the transmittance of each color filter in the numerical calculation pattern [2], for example, from the configuration of the reference example of the numerical calculation pattern [1], the peripheral end of the second lens 44G facing the third lens 44R on the X axis can be moved closer to the third lens 44R. Also, from the configuration of the reference example of the numerical calculation pattern [1], the peripheral end of the third lens 44R facing the second lens 44G can be moved closer to the peripheral end on the opposite side on the X axis. As a result, the amount of white light WL2 taken in by the second lens 44G becomes greater than the amount of white light WL2 taken in by the first lens 44B.

[0117] The brightness of image light IM1 in numerical calculation pattern [2] increased by 2% compared to numerical calculation pattern [1]. This result is believed to be due to the fact that the amount of green image light IG relative to blue image light IB and red image light IR in numerical calculation pattern [2] is higher than in numerical calculation pattern [1], improving visibility during observation. In numerical calculation pattern [2], the difference in the amount of green image light IG relative to red image light IR is greater than the difference in the amount of green image light IG relative to blue image light IB, compared to numerical calculation pattern [1]. Therefore, the spectrum of image light IM1 in numerical calculation pattern [2] deviates slightly from human visual sensitivity.

[0118] The color temperature of image light IM1 in numerical calculation pattern [2] was calculated to be 9053 [K], and the color deviation of image light IM1 was calculated to be -0.009. The color temperature of image light IM1 in numerical calculation pattern [2] is higher than that of numerical calculation pattern [1], and it is considered that image light IM1 in numerical calculation pattern [2] is more blue than that in numerical calculation pattern [1]. As mentioned above, it is considered that the color deviation of image light IM1 in numerical calculation pattern [2] is reduced compared to numerical calculation pattern [1] due to the spectrum of image light IM1 in numerical calculation pattern [2] being closer to the human visual sensitivity.

[0119] In the numerical calculation pattern [3], the transmittance of the red light RL in the red filter 54R is maintained at 100%, the transmittance of the green light GL in the green filter 54G is increased to 111%, and the transmittance of the blue light BL in the blue filter 54B is reduced to 90% compared to the assumption of the numerical calculation pattern [1]. In order to realize the transmittance of each color filter in the numerical calculation pattern [3], for example, from the configuration of the reference example of the numerical calculation pattern [1], the peripheral end of the second lens 44G facing the first lens 44B on the X axis can be moved closer to the first lens 44B. Also, from the configuration of the reference example of the numerical calculation pattern [1], the peripheral end of the first lens 44B facing the second lens 44G can be moved closer to the peripheral end on the opposite side on the X axis. As a result, the amount of white light WL2 taken in by the second lens 44G becomes greater than the amount of white light WL2 taken in by the third lens 44R.

[0120] The brightness of the image light IM1 in the numerical calculation pattern [3] was increased by 7% compared to the numerical calculation pattern [1]. This result is believed to be due to the fact that the light intensity of the green image light IG relative to the blue image light IB and the red image light IR is also higher in the numerical calculation pattern [3] than in the numerical calculation pattern [1], improving visibility during observation. In the numerical calculation pattern [3], the difference in the light intensity of the green image light IG relative to the red image light IR is smaller than the difference in the light intensity of the green image light IG relative to the blue image light IB, compared to the numerical calculation pattern [1]. Therefore, the spectrum of the image light IM1 in the numerical calculation pattern [3] is slightly different from the human visual sensitivity, and is also different from the spectrum of the image light IM1 in the numerical calculation pattern [2].

[0121] The color temperature of image light IM1 in the numerical calculation pattern [3] was calculated to be 7372 [K], and the color deviation of image light IM1 was calculated to be -0.006. The color temperature of image light IM1 in the numerical calculation pattern [3] is lower than that of the numerical calculation pattern [1], and it is considered that image light IM1 in the numerical calculation pattern [3] is more reddish than that in the numerical calculation pattern [1]. As mentioned above, it is considered that the color deviation of image light IM1 in the numerical calculation pattern [3] is reduced compared to the numerical calculation pattern [1] because the spectrum of image light IM1 in the numerical calculation pattern [3] is closer to the human visual sensitivity. In addition, it is considered that the color deviation of image light IM1 in the numerical calculation pattern [3] is reduced compared to the numerical calculation pattern [2] because the blueness of image light IM1 in the numerical calculation pattern [3] is reduced and it is closer to white.

[0122] In the numerical calculation pattern [4], the transmittance of the red light RL in the red filter 54R is increased to 117% compared to the assumption of the numerical calculation pattern [1], the transmittance of the green light GL in the green filter 54G is reduced to 90%, and the transmittance of the blue light BL in the blue filter 54B is maintained at 100%. In order to realize the transmittance of each color filter in the numerical calculation pattern [4], for example, from the configuration of the reference example of the numerical calculation pattern [1], the peripheral end of the third lens 44R facing the second lens 44G on the X axis can be moved closer to the second lens 44G. Also, from the configuration of the reference example of the numerical calculation pattern [1], the peripheral end of the second lens 44G facing the third lens 44R can be moved closer to the peripheral end on the opposite side on the X axis. As a result, the amount of white light WL2 taken in by the third lens 44R becomes greater than the amount of white light WL2 taken in by the second lens 44G.

[0123] The brightness of image light IM1 in numerical calculation pattern [4] was reduced by 4% compared to numerical calculation pattern [1]. This result is believed to be due to the fact that in numerical calculation pattern [4], the amount of green image light IG relative to blue image light IB and red image light IR was reduced more than in numerical calculation pattern [1], resulting in reduced visibility during observation. In numerical calculation pattern [4], the difference in the amount of green image light IG relative to red image light IR is greater than the difference in the amount of green image light IG relative to blue image light IB, compared to numerical calculation pattern [1]. Therefore, the spectrum of image light IM1 in numerical calculation pattern [4] deviates from human visual sensitivity.

[0124] The color temperature of image light IM1 in numerical calculation pattern [4] was calculated to be 8047 [K], and the color deviation of image light IM1 was calculated to be -0.024. The color temperature of image light IM1 in numerical calculation pattern [4] is lower than that of numerical calculation pattern [1], and it is considered that image light IM1 in numerical calculation pattern [4] is slightly redder than that in numerical calculation pattern [1]. As mentioned above, the relative amount of green image light IG contained in image light IM1 has decreased, and the spectrum of image light IM1 in numerical calculation pattern [4] has become farther away from the human visual sensitivity, which is considered to be the reason why the color deviation of image light IM1 in numerical calculation pattern [4] has increased compared to numerical calculation pattern [1].

[0125] In the numerical calculation pattern [5], the transmittance of the red light RL in the red filter 54R is maintained at 100%, the transmittance of the green light GL in the green filter 54G is reduced to 90%, and the transmittance of the blue light BL in the blue filter 54B is increased to 109% compared to the assumption of the numerical calculation pattern [1]. In order to realize the transmittance of each color filter in the numerical calculation pattern [5], for example, from the configuration of the reference example of the numerical calculation pattern [1], the peripheral end of the first lens 44B facing the second lens 44G on the X axis can be moved closer to the second lens 44G. Also, from the configuration of the reference example of the numerical calculation pattern [1], the peripheral end of the second lens 44G facing the first lens 44B can be moved closer to the peripheral end on the opposite side on the X axis. As a result, the amount of white light WL2 taken in by the first lens 44B becomes greater than the amount of white light WL2 taken in by the second lens 44G.

[0126] The brightness of image light IM1 in numerical calculation pattern [5] was 6% lower than that in numerical calculation pattern [1]. This result is believed to be due to the fact that the amount of green image light IG relative to blue image light IB and red image light IR in numerical calculation pattern [5] was reduced more than in numerical calculation pattern [1], resulting in lower visibility during observation. In numerical calculation pattern [5], the difference in the amount of green image light IG relative to red image light IR is smaller than the difference in the amount of green image light IG relative to blue image light IB, compared to numerical calculation pattern [1]. Therefore, the spectrum of image light IM1 in numerical calculation pattern [4] deviates from human visual sensitivity and also differs from the spectrum of image light IM1 in numerical calculation pattern [4].

[0127] The color temperature of image light IM1 in numerical calculation pattern [5] was calculated to be 11463 [K], and the color deviation of image light IM1 was calculated to be -0.022. The color temperature of image light IM1 in numerical calculation pattern [5] is much higher than that of numerical calculation pattern [1], and it is considered that image light IM1 in numerical calculation pattern [5] is more blue than that of numerical calculation pattern [1]. As mentioned above, the relative amount of green image light IG contained in image light IM1 has decreased, and the spectrum of image light IM1 in numerical calculation pattern [5] has become farther away from the human visual sensitivity, which is considered to be the reason why the color deviation of image light IM1 in numerical calculation pattern [5] has increased compared to numerical calculation pattern [1] and reached the same level as numerical calculation pattern [4].

[0128] In the numerical calculation pattern [6], the transmittance of the red light RL in the red filter 54R is reduced to 90%, the transmittance of the green light GL in the green filter 54G is maintained at 100%, and the transmittance of the blue light BL in the blue filter 54B is reduced to 90% compared to the assumption of the numerical calculation pattern [1]. The relative relationship between the transmittances of the respective color lights in the respective color filters in the numerical calculation pattern [6] is similar to the relative relationship between the transmittances of the respective color lights in the respective color filters realized in the pixel electrode 62 of the projector 301 of the present embodiment described above. In order to realize the transmittance of each color filter in the numerical calculation pattern [6], for example, from the configuration of the reference example of the numerical calculation pattern [1], the peripheral end of the second lens 44G facing each of the first lens 44B and the third lens 44R on the X axis can be moved so as to approach each of the first lens 44B and the third lens 44R. Also, the peripheral edge of each of the first lens 44B and the third lens 44R that faces the second lens 44G on the X-axis can be moved closer to the peripheral edge on the opposite side and away from the second lens 44G. This makes the amount of white light WL2 taken in by the second lens 44G greater than the amount of white light WL2 taken in by the first lens 44B and the third lens 44R.

[0129] The brightness of the image light IM1 in the numerical calculation pattern [6] was increased by 9% compared to the numerical calculation pattern [1]. This result is believed to be due to the fact that the light intensity of the green image light IG relative to each of the blue image light IB and the red image light IR in the numerical calculation pattern [6] was higher than that in the numerical calculation pattern [1], and the visibility during observation was improved. In the numerical calculation pattern [6], the light intensity difference of the green image light IG relative to the blue image light IB and the light intensity difference of the green image light IG relative to the red image light IR are equivalent compared to the numerical calculation pattern [1]. Therefore, the spectrum of the image light IM1 in the numerical calculation pattern [6] is closest to the human visual sensitivity among the numerical calculation patterns [1] to [6] and the numerical calculation pattern [7] described next.

[0130] The color temperature of image light IM1 in the numerical calculation pattern [6] was calculated to be 7595 [K], and the color deviation of image light IM1 was calculated to be -0.001. The color temperature of image light IM1 in the numerical calculation pattern [6] was lower than that of the numerical calculation pattern [1], and it is considered that image light IM1 in the numerical calculation pattern [6] is more blue than that in the numerical calculation pattern [1]. As mentioned above, the relative amount of green image light IG contained in image light IM1 increased, and the spectrum of image light IM1 in the numerical calculation pattern [6] was closer to human visual sensitivity than that in the numerical calculation pattern [1], which is the reason why the color deviation of image light IM1 in the numerical calculation pattern [6] was at least less than that in the numerical calculation pattern [1] and was the smallest among the numerical calculation patterns [1] to [7].

[0131] In the numerical calculation pattern [7], the transmittance of the red light RL in the red filter 54R is maintained at 100%, the transmittance of the green light GL in the green filter 54G is increased to 110%, and the transmittance of the blue light BL in the blue filter 54B is maintained at 100% compared to the assumption of the numerical calculation pattern [1]. In order to realize the transmittance of each color filter in the numerical calculation pattern [7], for example, from the configuration of the reference example of the numerical calculation pattern [1], at least one of the peripheral ends on the +Y side and the -Y side parallel to the X-axis in the second lens 44G is moved outward from the second lens 44G when viewed along the Z-axis, so that the dimension of the second lens 44G in the Y-axis can be made larger than the first lens 44B and the third lens 44R. As a result, the white light WL2 that would be irradiated onto the light-shielded area if the second lens 44G were not present is captured by the second lens 44G, and the amount of white light WL2 captured by the second lens 44G is greater than the amount of white light WL2 captured by the first lens 44B and the third lens 44R.

[0132] The brightness of the image light IM1 in the numerical calculation pattern [7] was increased by 3% compared to the numerical calculation pattern [1]. This result is believed to be due to the fact that the light intensity of the green image light IG relative to each of the blue image light IB and the red image light IR in the numerical calculation pattern [7] was higher than that in the numerical calculation pattern [1], and the visibility during observation was improved. In the numerical calculation pattern [7], the light intensity difference of the green image light IG relative to the blue image light IB and the light intensity difference of the green image light IG relative to the red image light IR are equivalent to each other compared to the numerical calculation pattern [1]. The spectrum of the image light IM1 in the numerical calculation pattern [7] is closer to the human visual sensitivity than in the numerical calculation pattern [1]. However, the light intensity difference of the green image light IG relative to the blue image light IB and the light intensity difference of the green image light IG relative to the red image light IR in the numerical calculation pattern [7] are smaller than those in the numerical calculation pattern [6]. Therefore, the brightness of the image light IM1 in the numerical calculation pattern [7] was lower than the brightness of the image light IM1 in the numerical calculation pattern [1] and was closer to that in the numerical calculation pattern [2].

[0133] The color temperature of image light IM1 in the numerical calculation pattern [7] was calculated to be 8288 [K], and the color deviation of image light IM1 was calculated to be -0.009. The color temperature of image light IM1 in the numerical calculation pattern [7] was slightly lower than that of the numerical calculation pattern [1], and it is considered that the image light IM1 in the numerical calculation pattern [7] is slightly more reddish than that in the numerical calculation pattern [1]. As mentioned above, the relative amount of green image light IG contained in the image light IM1 increased, and the spectrum of image light IM1 in the numerical calculation pattern [7] was slightly closer to the human visual sensitivity than that in the numerical calculation pattern [1], which is why the color deviation of image light IM1 in the numerical calculation pattern [7] was smaller than that in the numerical calculation pattern [1]. In fact, the color deviation of image light IM1 in the numerical calculation pattern [7] was equivalent to that in the numerical calculation pattern [2].

[0134] From the evaluation of the numerical calculation patterns [1] to [7], at least in the patterns such as the numerical calculation patterns [2], [3], [6], and [7] in which the transmittance of the green light GL in the green filter 54G is higher than the transmittance of the red light RL in the red filter 54R and the transmittance of the blue light BL in the blue filter 54B, the brightness of the image light IM1 is increased compared to the numerical calculation pattern [1], and the color deviation of the image light IM1 is reduced compared to the numerical calculation pattern [1]. As described above, it is assumed that the transmittance per unit area of ​​the three color filters of the red filter 54R, the green filter 54G, and the blue filter 54B is equivalent to one another, and that the areas of the three color filters when viewed along the Z axis are equivalent to one another. Therefore, by making the area of ​​the second lens 44G larger than the areas of the first lens 44B and the third lens 44R when viewed along the Z axis, the amount of green light GL passing through the green filter 54G can be increased to be greater than the amount of red light RL passing through the red filter 54R and the amount of blue light BL passing through the blue filter 54B. As a result, the amount of green image light IG contained in the image light IM1 becomes greater than the amount of blue image light IB and red image light IR, and the spectrum of the full-color image light IM1, IM2 matches the visual sensitivity of a human observer and corresponds to the visual sensitivity of a human observer. Therefore, the brightness of the image light IM1, IM2 is increased, the color deviation of the white balance of the image light IM1, IM2 is reduced, and the visibility of the image light IM1, IM2 to the observer is improved.

[0135] In the numerical calculation pattern [6] among the numerical calculation patterns [2], [3], [6], and [7], the light intensity difference between the image lights IG and IB and the light intensity difference between the image lights IG and IR are equal to each other, and is 27%. When the light intensity difference between the image lights IG and IB and the light intensity difference between the image lights IG and IR are, for example, 20% or more and 40% or less, the spectrum of the image lights IM1 and IM2 is well matched to the visual sensitivity of humans, and the brightness of the image lights IM1 and IM2 is further increased. By changing the light intensity difference between the image lights IG and IB or the light intensity difference between the image lights IG and IR, the color temperature and color deviation of the white balance of the image lights IM1 and IM2 can be adjusted. Note that the color temperature and color deviation of the image lights IM1 and IM2 are also adjusted when the peak wavelengths of the red light RL, the green light GL, and the blue light BL are changed.

[0136] The projector 301 of the present embodiment described above includes a light source device 10, a lens array 40, a color filter 52, a pixel electrode 62, and a projection optical system 90. The light source device 10 emits white light WL1, WL2 including blue light BL, green light GL, and red light RL. The lens array 40 is disposed on the optical path of the white light WL2 emitted from the light source device 10, and has a plurality of microlenses 42. The microlenses 42 correspond to a "lens". The plurality of microlenses 42 include a first lens 44B, a second lens 44G, and a third lens 44R. The color filter 52 is disposed on the optical path of the white light WL2 emitted from the lens array 40, and includes a blue filter 54B, a green filter 54G, and a red filter 54R. The blue filter 54B transmits blue light BL included in the white light WL2 emitted from the first lens 44B of the plurality of microlenses 42. The green filter 54G transmits the green light GL contained in the white light WL2 emitted from the second lens 44G of the multiple microlenses 42. The red filter 54R transmits the red light RL contained in the white light WL2 emitted from the third lens 44R of the multiple microlenses 42. The pixel electrode 62 is disposed on the optical path of the red light RL, the green light GL, and the blue light BL transmitted through the color filter 52, and disposed so as to face the color filter 52. The pixel electrode 62 includes a blue subpixel electrode 66B, a green subpixel electrode 66G, and a red subpixel electrode 66R. The blue subpixel electrode 66B modulates the blue light BL transmitted through the blue filter 54B in accordance with image information, and emits blue image light IB. The green subpixel electrode 66G modulates the green light GL transmitted through the green filter 54G in accordance with image information, and emits green image light IG. The red subpixel electrode 66R modulates the red light RL transmitted through the red filter 54R in accordance with image information, and emits red image light IR. The projection optical system 90 is disposed on the optical path of the blue image light IB, the green image light IG, and the red image light IR, and projects the blue image light IB, the green image light IG, and the red image light IR. In other words, the projection optical system 90 is disposed on the optical path of image light IM2 formed by combining the image lights IB, IG, and IR, and projects the image light IM2.

[0137] In the projector 301 of this embodiment, the multiple microlenses 42 of the lens array 40 include a first lens 44B that emits white light WL2 toward a blue filter 54B, a second lens 44G that emits white light WL2 toward a green filter 54G, and a third lens 44R that emits white light WL2 toward a red filter 54R. The areas of the entrance surface 44a and the exit surface 44b of the second lens 44G are larger than the area of ​​the entrance surface 54a of the green filter 54G, and are larger than the areas of the entrance surface 44a and the exit surface 44b of the first lens 44B and the area of ​​the entrance surface 44a and the exit surface 44b of the third lens 44R.

[0138] In the projector 301 of the present embodiment, the size of the second lens 44G corresponding to the green light GL, i.e., the area when viewed along the optical axis AX and the Z axis, is larger than that of the first lens 44B corresponding to the blue light BL and the third lens 44R corresponding to the red light RL. According to the projector 301 of the present embodiment, the amount of green light GL incident on the green subpixel electrode 66G using the second lens 44G can be made larger than the amount of blue light BL incident on the blue subpixel electrode 66B using the first lens 44B and the amount of red light RL incident on the red subpixel electrode 66R using the third lens 44R. That is, more green light GL can be made incident on the green subpixel electrode 66G using the second lens 44G and the green filter 54G. As a result, in the image or video projected from the projector 301 of the present embodiment, the brightness of the green image light IG, which has a high luminosity factor for humans, can be easily increased more than that of the blue image light IB and the red image light IR. According to the projector 301 of the present embodiment, the observer can visually recognize the image or video displayed on the screen or the like brighter than that of a conventional projector. That is, according to the projector 301 of the present embodiment, even if the light amount ratios of the red light RL, the green light GL, and the blue light BL contained in the white light WL1, WL2 emitted from the light source device 10 are equal to each other, the light amount of the green image light IG contained in the image light IM2 can be made greater than the light amounts of the blue image light IB and the red image light IR. Therefore, according to the projector 301 of the present embodiment, the illuminance ratio and spectrum of the red, green, and blue image light in the projected image or video can be adjusted to the visual sensitivity of the person observing the image or video, thereby realizing an image or video that is visually recognized as brighter than that of a conventional projector.

[0139] As a method for adjusting the spectrum of the image lights IM1 and IM2 emitted from the light modulation device 50 to the human visual sensitivity and changing the white balance, for example, a method for changing the characteristics of each of the red filter 54R, the green filter 54G, and the blue filter 54B of the color filter 52, that is, a method for changing the transmittance of the red light RL in the red filter 54R, the transmittance of the green light GL in the green filter 54G, and the transmittance of the blue light BL in the blue filter 54B, can be considered. As another method for adjusting the spectrum of the image lights IM1 and IM2 to the human visual sensitivity and changing the white balance, a method for changing the areas of each of the red subpixel electrode 66R, the green subpixel electrode 66G, and the blue subpixel electrode 66B of the pixel electrode 62 when viewed along the Z axis can be considered. However, in these methods, it becomes necessary to individually design the light modulation device 50 including the color filter 52 and the pixel electrode 62 according to the white balance of the image lights IM1 and IM2 to be realized, which leads to an increase in the cost of the projector 301.

[0140] On the other hand, according to the projector 301 of the present embodiment, the areas of the first lens 44B, the second lens 44G, and the third lens 44R of the lens array 40, which is a component separate from the light modulation device 50, can be suitably set according to a spectrum that matches human visual sensitivity in accordance with the transmittance of each color light of each color filter in the light modulation device 50 and the area of ​​each color subpixel electrode, and the area of ​​the second lens 44G can be made larger than the areas of the first lens 44B and the third lens 44R. With this method, the cost of the projector 301 can be reduced compared to the case where the light modulation device 50 is designed individually.

[0141] Another possible method for changing the white balance by adjusting the spectrum of the image lights IM1 and IM2 to the human visual sensitivity is to suitably adjust the gradation of each of the red subpixel electrode 66R, the green subpixel electrode 66G, and the blue subpixel electrode 66B of the pixel electrode 62 in accordance with a spectrum that matches the human visual sensitivity. However, this method reduces the brightness of the image lights IM1 and IM2.

[0142] In order to adjust the spectrum of the image lights IM1 and IM2 to the human visual sensitivity, it is preferable that the amount of green light GL contained in the image lights IM1 and IM2 is 110% or more and 150% or less relative to the amount of each of the red light RL and blue light BL, and it is more preferable that it is 120% or more and 140% or less.

[0143] In addition, the lens array 40 may contact the light modulation device 50 in the Z axis. If the lens array 40 and the light modulation device 50 are separate components, for example, the exit surface 44b of the first lens 44B, the second lens 44G, and the third lens 44R of the lens array 40 may contact the entrance surface 52a of the color filter 52 of the light modulation device 50. In this case, the distance between the lens array 40 and the light modulation device 50 in the Z axis becomes extremely short, and the distance PL is shortened. Therefore, the microlenses 42 of the lens array 40 need to have high power, and the spot diameter of the color light at each of the focusing points MR, MG, and MB becomes small. On the other hand, there is an advantage that the alignment between the microlenses 42 and the corresponding color filters is easy, and the positional deviation between the microlenses 42 and the corresponding color filters is unlikely to occur.

[0144] In the case where the lens array 40 and the light modulation device 50 are separated from each other on the Z axis as in the projector 301 of this embodiment, the separation distance PL is longer than when they are in contact with each other as described above, so the microlenses 42 of the lens array 40 may have low power, and the spot diameter of the colored light at each of the focusing points MR, MG, and MB becomes large. Restrictions on the material of the microlenses 42 and the shape error allowable during manufacturing are relaxed. On the other hand, highly accurate alignment between the microlenses 42 and the corresponding color filters is required.

[0145] In the projector 301 of this embodiment, the first lens 44B, the second lens 44G, and the third lens 44R of the lens array 40 are arranged along the X-axis and the Y-axis. The Z-axis is an axis parallel to the optical axis AX of the white light WL2 incident on the lens array 40, and corresponds to the "first axis". The X-axis is orthogonal to the Z-axis and corresponds to the "second axis". The Y-axis is orthogonal to the Z-axis and the X-axis and corresponds to the "third axis". On the X-axis, the width XG of the second lens 44G is larger than the width XB of the first lens 44B and the width XR of the third lens 44R. Specifically, in the projector 301 of this embodiment, the red filter 54R, the green filter 54G, and the blue filter 54B of the color filter 52 of the light modulation device 50 are arranged in a repeated sequence on the X-axis. In accordance with the arrangement of these color filters, the red subpixel electrode 66R, the green subpixel electrode 66G, and the blue subpixel electrode 66B of the pixel electrode 62 of the light modulation device 50 are sequentially and repeatedly arranged along the X axis. In accordance with the arrangement of the color filters and subpixel electrodes described above, the third lens 44R, the second lens 44G, and the first lens 44B of the lens array 40 are sequentially and repeatedly arranged along the X axis.

[0146] According to the projector 301 of this embodiment, since the width XG of the second lens 44G is larger than the width XB of the first lens 44B and the width XR of the third lens 44R, the amount of white light WL2 taken into the second lens 44G can be made greater than the amount of white light WL2 taken into each of the first lens 44B and the third lens 44R on the X axis. As a result, the brightness of the image lights IM1 and IM2 is increased, and the viewer can view the image or video brighter than with a conventional projector.

[0147] In the projector 301 of this embodiment, when viewed along the Z axis, the -X side end of the second lens 44G of the lens array 40 overlaps with the red filter 54R of the color filter 52. When viewed along the Z axis, the +X side end of the second lens 44G of the lens array 40 overlaps with the blue filter 54B of the color filter 52. The -X side end and the +X side end of the second lens 44G correspond to "a part of the second lens."

[0148] In the projector 301 of this embodiment, if the end of the second lens 44G on the -X side does not overlap with the red filter 54R, the white light WL2 passing through the red filter 54R is collected by the second lens 44G on the green filter 54G and passes through the green filter 54G. Similarly, if the end of the second lens 44G on the +X side does not overlap with the blue filter 54B, the white light WL2 passing through the blue filter 54B is collected by the second lens 44G on the green filter 54G and passes through the green filter 54G. According to the projector 301 of this embodiment, the end of the second lens 44G on the -X side and the end of the second lens 44G on the +X side can increase the amount of white light WL2 incident on the green filter 54G and reduce the amount of white light WL2 incident on the red filter 54R and the blue filter 54B. As a result, the difference between the amount of green light GL transmitted through the green filter 54G, the amount of red light RL transmitted through the red filter 54R, and the amount of blue light BL transmitted through the blue filter 54B increases. According to the projector 301 of the present embodiment, the spectrum of the projected image light IM2 can be easily adjusted to the visual sensitivity of the human observer.

[0149] In the projector 301 of this embodiment, the color filter 52 has light-shielding regions 56 for blocking the white light WL2 between any of the red filter 54R, the green filter 54G, and the blue filter 54B that are adjacent to each other in a plane perpendicular to the optical axis AX of the white light WL2. The light-shielding regions 56 are provided in the following regions on the X axis: a region on the -X side of the red filter 54R that is disposed closest to the -X side in the color filter 52, a region between the red filter 54R and the green filter 54G, a region between the green filter 54G and the blue filter 54B, a region between the blue filter 54B and the red filter 54R, and a region on the +X side of the blue filter 54B that is disposed closest to the +X side in the color filter 52. The light-shielding regions 56 are provided on the Y axis in the region on the +Y side of each of the red filters 54R, green filters 54G, and blue filters 54B that are arranged furthest on the +Y side in the color filter 52, in the region between adjacent red filters 54R, in the region between adjacent green filters 54G, in the region between adjacent blue filters 54B, and in the region on the -Y side of each of the red filters 54R, green filters 54G, and blue filters 54B that are arranged furthest on the -Y side in the color filter 52.

[0150] In the projector 301 of this embodiment, the first lens 44B, the second lens 44G, and the third lens 44R overlap the light-shielding region 56 when viewed along the Z axis. Therefore, if the first lens 44B, the second lens 44G, and the third lens 44R are not present, the white light WL2 that is irradiated to the light-shielding region 56 and is not used as the image lights IM1 and IM2 can be passed through the blue filter 54B, the green filter 54G, and the red filter 54R by using each lens. As a result, the maximum amount of colored light passing through each of the first lens 44B, the second lens 44G, and the third lens 44R is increased compared to the case where the light-shielding region 56 is not provided. According to the projector 301 of this embodiment, the adjustable range of the area of ​​each of the first lens 44B, the second lens 44G, and the third lens 44R can be expanded according to the width of the light-shielding region 56 on the X axis and the Y axis. This increases the degree of freedom in adjusting the spectrum of the image lights IM1 and IM2.

[0151] In the projector 301 of this embodiment, as described above, the red filter 54R, the green filter 54G, and the blue filter 54B of the color filter 52 are arranged along the X-axis and the Y-axis in the XY plane. The XY plane corresponds to a "plane intersecting the first axis". The light-shielding region 56 is arranged in a region extending parallel to the Y-axis between the red filter 54R and the green filter 54G adjacent to each other on the X-axis, a region extending parallel to the Y-axis between the green filter 54G and the blue filter 54B adjacent to each other on the X-axis, and a region extending parallel to the Y-axis between the blue filter 54B and the red filter 54R adjacent to each other on the X-axis. The light-shielding region 56 is also arranged in a region extending parallel to the X-axis between the red filters 54R adjacent to each other on the Y-axis, a region extending parallel to the X-axis between the green filters 54G adjacent to each other on the Y-axis, and a region between the blue filters 54B adjacent to each other on the Y-axis. Furthermore, the light-shielding region 56 is disposed in a region extending parallel to the Y axis on the -X side of the red filter 54R disposed on the -X side of the color filter 52, and in a region extending parallel to the Y axis on the +X side of the blue filter 54B disposed on the +X side of the color filter 52. That is, the light-shielding region 56 is disposed in a region extending parallel to the X axis and a region extending parallel to the Y axis in the outer peripheral portion of the region in which the color filters are disposed in the color filter 52 when viewed along the Z axis. In the projector 301 of this embodiment, the width y2 of the light-shielding region 56 extending parallel to the X axis in the Y axis is larger than the width x2 of the light-shielding region extending parallel to the Y axis in the X axis. The first lens 44B, the second lens 44G, and the third lens 44R of the lens array 40 have power in the Y axis.

[0152] In the projector 301 of this embodiment, since the width y2 of the light-shielding area 56 is greater than the width x2, the adjustable width of each of the first lens 44B, the second lens 44G and the third lens 44R on the Y axis can be ensured to be greater than the adjustable width on the X axis.

[0153] In the projector 301 of this embodiment, when viewed along the Z axis, the principal point HB of the first lens 44B of the lens array 40 overlaps with the center of the blue filter 54B of the color filter 52 and the center of the blue subpixel electrode 66B of the pixel electrode 62. The principal point HG of the second lens 44G of the lens array 40 overlaps with the center of the green filter 54G of the color filter 52 and the center of the green subpixel electrode 66G of the pixel electrode 62. The principal point HR of the third lens 44R of the lens array 40 overlaps with the center of the red filter 54R of the color filter 52 and the center of the red subpixel electrode 66R of the pixel electrode 62.

[0154] In the projector 301 of this embodiment, when viewed along the Z axis, the white light WL2 emitted from the first lens 44B is not easily blocked by the peripheral edge of the blue filter 54B, and the blue light BL transmitted through the blue filter 54B is not easily blocked by the peripheral edge of the blue subpixel electrode 66B. Therefore, the blue light BL can be efficiently incident on the blue subpixel electrode 66B. Similarly, when viewed along the Z axis, the white light WL2 emitted from the second lens 44G is not easily blocked by the peripheral edge of the green filter 54G, and the green light GL transmitted through the green filter 54G is not easily blocked by the peripheral edge of the green subpixel electrode 66G. Therefore, the green light GL can be efficiently incident on the green subpixel electrode 66G. Similarly, when viewed along the Z axis, the white light WL2 emitted from the third lens 44R is not easily blocked by the peripheral edge of the red filter 54R, and the red light RL transmitted through the red filter 54R is not easily blocked by the peripheral edge of the red subpixel electrode 66R. Therefore, the red light RL can be made to efficiently enter the red subpixel electrode 66R.

[0155] Next, a modified example of one embodiment of the present invention will be described. In each modification, the same reference numerals as those in the corresponding embodiment are used for the configurations common to the above embodiment, and the description that overlaps with the above embodiment will be omitted. In each modification, the configurations and contents different from the above embodiment will be described.

[0156] (First Modification) 6 is a schematic diagram of the lens array 40 and the color filter 52 of the light modulation device 50 of the first modified example of the projector 301 of the embodiment of the present invention, and is a front view of the lens array 40 and the color filter 52 when viewed from the -Z side along the Z axis. As shown in FIG. 6, in the first modified example, for example, in the pixel electrode 62 of the light modulation device 50, the wiring region 68 between the red subpixel electrode 66R and the green subpixel electrode 66G on the X axis of each pixel 64, and the wiring region 68 between the green subpixel electrode 66G and the blue subpixel electrode 66B on the X axis may not be provided. With such a configuration, in the color filter 52 of the light modulation device 50, the light-shielding region 56 between the red filter 54R and the green filter 54G, and the light-shielding region 56 between the green filter 54G and the blue filter 54B on the X axis may not be provided.

[0157] In the first modified example of the projector 301, the width XB of the first lens 44B on the X axis, the width XG of the second lens 44G on the X axis, and the width XR of the third lens 44R on the X axis are set so that the area of ​​the second lens 44G is appropriately larger than the areas of the first lens 44B and the third lens 44R. The above-mentioned "appropriately" means a state in which the spectrum of the image light IM1, IM2 corresponds to the visual sensitivity of the human being so that the desired brightness of the projected image light IM2 is obtained. In the first modified example of the projector 301, the same action and effect as the projector 301 of the above-mentioned embodiment can be obtained. According to the first modified example of the projector 301, the brightness of the red, green, and blue image light in the projected image or video can be adjusted to the visual sensitivity of the human being who observes it, and an image or video that is visually recognized as brighter than that of a conventional projector can be realized.

[0158] (Second Modification) Although not shown in the figure, in the second modified example, for example, in the pixel electrode 62 of the light modulation device 50, the wiring region 68 between the red subpixel electrodes 66R on the Y axis, the wiring region 68 between the green subpixel electrodes 66G on the Y axis, and the wiring region 68 between the blue subpixel electrodes 66B on the Y axis may not be provided.

[0159] In the second modified example as well, the width XB of the first lens 44B, the width XG of the second lens 44G, and the width XR of the third lens 44R are set so that the area of ​​the second lens 44G is appropriately larger than the areas of the first lens 44B and the third lens 44R. According to the second modified example of projector 301, the same effects as those of projector 301 in the above-described embodiment can be obtained, and therefore it is possible to realize images and videos that are perceived as brighter than those of conventional projectors by adjusting the brightness of the red, green, and blue image light in the projected image or video to the visual sensitivity of the human observer.

[0160] (Third Modification) Although not shown, in the third modified example, for example, when viewed along the Z axis, the wiring region 68 may be disposed outside the region of each pixel 64 of the pixel electrode 62, and the width x2 on the X axis and the width y2 on the Y axis of the wiring region 68 in each pixel 64 may be extremely small to the extent that they can be ignored. In accordance with the arrangement of the pixel electrodes 62, the light-shielding region 56 may be disposed outside the region of a set of red filter 54R, green filter 54G, and blue filter 54B of the color filter 52 when viewed along the Z axis, and the width x2 on the X axis and the width y2 on the Y axis of each light-shielding region 56 may be extremely small to the extent that they can be ignored. In such an arrangement, none of the first lens 44B, the second lens 44G, and the third lens 44R of the microlenses 42 of the lens array 40 may overlap the light-shielding region 56 when viewed along the Z axis.

[0161] In the third modified example as well, the widths XB, YB of the first lens 44B, the widths XG, YG of the second lens 44G, and the widths XR, YR of the third lens 44R are set so that the area of ​​the second lens 44G is appropriately larger than the areas of the first lens 44B and the third lens 44R. According to the third modified example of the projector 301, the same effects as those of the projector 301 in the above-mentioned embodiment can be obtained, and therefore it is possible to realize images and videos that are perceived as brighter than those of conventional projectors by adjusting the brightness of the red, green, and blue image light in the projected image or video to the visual sensitivity of the human observer.

[0162] As exemplified in the first to third modified examples, the arrangement and width of the light-shielding region 56 in the color filter 52 of the optical modulation device 50 and the wiring region 68 of the pixel electrode 62 when viewed along the Z axis are not limited to those in the above-described embodiments and may be changed as appropriate.

[0163] (Fourth Modification) 7 is a schematic diagram of the lens array 40 and the color filter 52 of the light modulation device 50 of a fourth modified example of the projector 301 of an embodiment of the present invention, and is a front view of the lens array 40 and the color filter 52 when viewed from the -Z side along the Z axis. As shown in FIG. 7, in the fourth modified example, for example, the width XB of the first lens 44B, the width XG of the second lens 44G, and the width XR of the third lens 44R of the lens array 40 are equal to each other. On the other hand, the width YG of the second lens 44G is larger than the width YB of the first lens 44B and the width YR of the third lens 44R.

[0164] In the fourth modified example as well, the width YB of the first lens 44B, the width YG of the second lens 44G, and the width YR of the third lens 44R are set so that the area of ​​the second lens 44G is appropriately larger than the areas of the first lens 44B and the third lens 44R. According to the fourth modified example of projector 301, the same effects as those of projector 301 in the above-described embodiment can be obtained, and therefore it is possible to realize images and videos that are perceived as brighter than those of conventional projectors by adjusting the brightness of red, green, and blue image light in the projected images and videos to the visual sensitivity of the human observer.

[0165] In the fourth modified example, the second lens 44G does not overlap with the blue filter 54B and the red filter 54R when viewed along the Z axis parallel to the optical axis AX of the white light WL2 incident on the lens array 40. The configuration of the fourth modified example is suitable for the case where the color filter 52 is provided with a light-shielding region 56 having a sufficient width y2, and the pixel electrode 62 is provided with a wiring region 68 having a sufficient width y2, in order to make the area of ​​the second lens 44G appropriately larger than the first lens 44B and the third lens 44R.

[0166] Although not shown, in order to make the area of ​​the second lens 44G appropriately larger than those of the first lens 44B and the third lens 44R, a part of the second lens 44G may overlap with either the blue filter 54B or the red filter 54R when viewed along the Z axis. One of the color filters is selected according to the desired color temperature and color deviation of the white balance realized by the image lights IM1 and IM2.

[0167] Although not shown, in the configuration of the fourth modified example, the width XG of the second lens 44G of the lens array 40 may be larger than the width XB of the first lens 44B and the width XR of the third lens 44R. In this case, by increasing the width on the X axis, the difference between the area of ​​the second lens 44G and the areas of the first lens 44B and the third lens 44R increases. By appropriately making the area of ​​the second lens 44G larger than the areas of the first lens 44B and the third lens 44R, the above-mentioned effects can be obtained.

[0168] (Fifth Modification) Fig. 8 is a perspective view of a second lens 44G of the lens array 40 in a fifth modified example of the projector 301 according to an embodiment of the present invention. Fig. 9 is a schematic diagram of the lens array 40 and the color filter 52 and pixel electrode 62 of the light modulation device 50 in the fifth modified example, and corresponds to the cross-sectional view taken along the line C1-C1 in Fig. 2. Fig. 10 is a schematic diagram of the lens array 40 and the color filter 52 and pixel electrode 62 of the light modulation device 50 in the fifth modified example, and corresponds to the cross-sectional view taken along the line C2-C2 in Fig. 2.

[0169] 8 to 10, the incident surface 44a of the second lens 44G of the lens array 40 has an incident surface 44p and an incident surface 44q. The width x3 of the incident surface 44p in the X-axis is the same as the width x1 of the green filter 54G of the color filter 52. The incident surface 44p is a flat surface parallel to the XY plane. The width y3 of the incident surface 44p in the Y-axis is the same as the width y1 of the green filter 54G. The incident surface 44p overlaps with the green filter 54G and the green subpixel electrode 66G of the pixel electrode 62 when viewed along the Z-axis.

[0170] Incident surface 44q is, for example, a part of a curved surface that is convex toward the -Z side with its apex at the same position as light-collecting point MG on the X-axis and Y-axis, and is a part of a curved surface designed according to separation distance PL. Incident surface 44q is the curved surface described above that is composed of the remaining part excluding the parts that overlap with green filter 54G and green subpixel electrode 66G when viewed along the Z-axis, and is disposed between widths x1 and XG on the X-axis and between widths y1 and YG on the Y-axis with principal point HG as the center when viewed along the Z-axis.

[0171] As described above, the second lens 44G has the entrance surfaces 44p and 44q as the entrance surface 44a, and thus has no power in the portion overlapping with the green filter 54G when viewed along the Z axis, and has positive power in the portion not overlapping with the green filter 54G. Therefore, the white light WL2 incident on the entrance surface 44a of the second lens 44G and incident on the entrance surface 44p in the region overlapping with the green filter 54G when viewed along the Z axis travels straight along the Z axis without being refracted in the X axis and Y axis, and enters the green filter 54G. The green light GL transmitted through the green filter 54G is emitted to the +Z side along the Z axis, enters the green subpixel electrode 66G, and is converted into green image light IG.

[0172] In the fifth modified example, the width XB of the first lens 44B, the width XG of the second lens 44G, and the width XR of the third lens 44R are set so that the area of ​​the second lens 44G is appropriately larger than the areas of the first lens 44B and the third lens 44R. The green light GL included in the white light WL2 incident on the incident surfaces 44p and 44q of the second lens 44G travels in different paths, but ultimately enters the green subpixel electrode 66G and is converted into green image light IG. Therefore, according to the fifth modified example of the projector 301, the same effects as those of the projector 301 of the above-mentioned embodiment can be obtained, and therefore it is possible to realize an image or video that is visually recognized as brighter than that of a conventional projector by adjusting the brightness of the red, green, and blue image lights in the projected image or video to the visual sensitivity of a human being who observes the image or video.

[0173] In the fifth modified example, the center of incident surface 44a of second lens 44G when viewed along the Z axis is composed of incident surface 44p, which is a flat surface parallel to the XY plane. In the configuration of the fifth modified example, incident surface 44a of second lens 44G is composed of a single curved surface, and compared to a case in which incident surface 44a as a whole has positive power, the thickness of second lens 44G in the Z axis is reduced, making it possible to make second lens 44G thinner.

[0174] Furthermore, according to the fifth modification of the projector 301, the light intensity of the green light GL incident on the green subpixel electrode 66G can be dispersed over the entire green subpixel electrode 66G. This makes it possible to suppress the generation of green light GL with locally high light intensity in the green subpixel electrode 66G, thereby reducing the load that would be generated if green light GL with locally high light intensity were to be generated.

[0175] 9 and 10, in the fifth modified example, the first lens 44B may have no power in a portion overlapping with the blue filter 54B and the blue subpixel electrode 66B, and may have positive power in a portion not overlapping with the blue filter 54B and the blue subpixel electrode 66B. The third lens 44R may have no power in a portion overlapping with the red filter 54R and the red subpixel electrode 66R, and may have positive power in a portion not overlapping with the red filter 54R and the red subpixel electrode 66R. That is, at least one of the first lens 44B, the second lens 44G, and the third lens 44R may have no power in a portion overlapping with a color filter arranged corresponding to the lens when viewed along the Z axis, and may have positive power in a portion not overlapping with a color filter arranged corresponding to the lens.

[0176] Furthermore, in the fifth modified example, at least a portion of the white light WL2 emitted from both ends on the X axis and both ends on the Y axis of the incident surface 44p of the second lens 44G to the +Z side approximately along the Z axis may be blocked by the light-shielding region 56 adjacent on the X axis and Y axis to the green filter 54G arranged corresponding to the second lens 44G. In order to suppress loss of the white light WL2, when at least one of the first lens 44B, the second lens 44G, and the third lens 44R has the incident surfaces 44p, 44q as the incident surface 44a, the width x3 of the incident surface 44p of the lens may be appropriately smaller than the width x1, and the width y3 of the incident surface 44p of the lens may be appropriately smaller than the width y1.

[0177] (Sixth Modification) Although not shown, in the sixth modified example, when viewed along the Z axis parallel to the optical axis AX of the white light WL2 incident on the lens array 40, the principal points HR, HB of at least one of the first lens 44B and the third lens 44R of the lens array 40 may be positioned at a position different from the center of the color filter arranged corresponding to the lens without overlapping with the center of the color filter of the color filter 52 arranged corresponding to the lens.

[0178] In the sixth modified example, for example, when viewed along the Z axis, the principal point HR and the condensing point MR of the third lens 44R may be disposed on the +X side of the center of the red filter 54R on the X axis. The principal point HB and the condensing point MB of the first lens 44B may be disposed on the -X side of the center of the blue filter 54B on the X axis. In this case, the light flux of the white light WL2 emitted from the third lens 44R and condensed at the condensing point MR easily passes through the central part of the red filter 54R on the X axis, so that the loss of the white light WL2 and the red light RL can be suppressed. Similarly, the light flux of the white light WL2 emitted from the first lens 44B and condensed at the condensing point MB easily passes through the central part of the blue filter 54B on the X axis, so that the loss of the white light WL2 and the blue light BL can be suppressed.

[0179] In the sixth modified example as well, the widths XB, YB of the first lens 44B, the widths XG, YG of the second lens 44G, and the widths XR, YR of the third lens 44R are set so that the area of ​​the second lens 44G is appropriately larger than the areas of the first lens 44B and the third lens 44R. Therefore, according to the sixth modified example of the projector 301, the same effects as those of the projector 301 in the above-mentioned embodiment can be obtained, and therefore it is possible to realize images and videos that are visually perceived as brighter than those of conventional projectors by adjusting the brightness of the red, green, and blue image lights in the projected images and videos to the visual sensitivity of the human observer.

[0180] (Seventh Modification) Although not shown, in the seventh modification, when viewed along the Z axis, among the multiple microlenses 42 arranged in the lens array 40, the positive power of the microlenses 42 arranged in the outer periphery around the optical axis AX of the white light WL2 may be stronger than the positive power of the microlenses 42 arranged in the center around the optical axis AX. For example, the light-concentration points MB, MG, and MR of the first lens 44B, the second lens 44G, and the third lens 44R of the microlenses 42 arranged in the outer periphery of the lens array 40 are arranged in the center of the blue subpixel electrode 66B, the green subpixel electrode 66G, and the red subpixel electrode 66R of the pixel electrode 62 in the X-axis, Y-axis, and Z-axis. As a result, the white light WL2 incident on the microlenses 42 arranged in the outer periphery of the lens array 40 is incident on the color filters arranged corresponding to the microlenses 42, as in the projector 301 of the above-mentioned embodiment. The red light RL, the green light GL, or the blue light BL transmitted through each color filter is efficiently incident on the subpixel electrode of the corresponding color.

[0181] On the other hand, the focusing points MB, MG, MR of the first lens 44B, second lens 44G, and third lens 44R of the microlenses 42 arranged in the center of the lens array 40 are arranged in the center of the blue subpixel electrode 66B, green subpixel electrode 66G, and red subpixel electrode 66R in the X-axis and Y-axis, and are arranged in a region on the +Z side of the exit surfaces 66b of the blue subpixel electrode 66B, green subpixel electrode 66G, and red subpixel electrode 66R in the Z-axis. That is, in each of the X-axis and Y-axis, the radius of curvature of the entrance surfaces 44a of the first lens 44B, second lens 44G, and third lens 44R in the central portion of the lens array 40 is larger than the radius of curvature of the entrance surfaces 44a of the first lens 44B, second lens 44G, and third lens 44R in the peripheral portion when the optical axis AX is taken as the center. In this case, a portion of the white light WL2 incident on the microlens 42 arranged in the center of the lens array 40 is blocked by the light-shielding region 56 adjacent in the XY plane to the color filter arranged corresponding to the microlens 42, and does not enter the subpixel electrode of the corresponding color.

[0182] The projector 301 of the present embodiment is a single-plate projector as described above. In the single-plate projector, white light including blue light, green light, and red light is converted into full-color image light by one light modulation device. As configurations other than the single-plate projector, two-plate projectors and three-plate projectors are known. In the two-plate projector, two light modulation devices are used, and for example, one color light of blue light, green light, and red light is converted into image light in time series by one light modulation device, and the other color light of green light and red light is converted into image light in synchronization with the one color light by another light modulation device. In the three-plate projector, three light modulation devices are used, and each color light of blue light, green light, and red light is converted into image light by each light modulation device. The number of parts of the single-plate projector including the projector 301 of the present embodiment is suppressed to be smaller than that of the two-plate projector and the three-plate projector. On the other hand, in a single-panel projector, the area of ​​the entrance and exit surfaces of a single light modulation device is larger than in other types, and the illuminance of white light at the center of the entrance surface of the light modulation device, centered on the optical axis, tends to be higher than the illuminance of white light at the outer periphery.

[0183] In the seventh modification, the positive power of the microlenses 42 arranged on the periphery of the lens array 40 is stronger than the positive power of the microlenses 42 arranged on the center. Therefore, the illuminance of the color light passing through the color filter 52 of the light modulation device 50 corresponding to the microlenses 42 arranged on the periphery and the color light incident on the subpixel electrode of the pixel electrode 62 is relatively lower than the illuminance of the color light passing through the color filter corresponding to the microlens 42 arranged on the center and the color light incident on the subpixel electrode. Therefore, in the seventh modification, when the illuminance of the white light WL2 irradiated to the lens array 40 at the center centered on the optical axis AX is relatively higher than that at the periphery, and the illuminance difference of the white light WL2 between the center and the periphery is large, the illuminance difference of the white light WL2 is reduced by the difference in the positive power of the microlenses 42 between the center and the periphery. Therefore, in the seventh variant, even if the illuminance at the center of the white light WL2 irradiated to the lens array 40 is higher than that at the outer periphery, it is possible to achieve a uniform illuminance distribution in the XY plane centered on the optical axis AX of the image light IM1, IM2 emitted from the light modulation device 50.

[0184] In the seventh modification, the radius of curvature of the entrance surface 44a of the first lens 44B, the second lens 44G, and the third lens 44R in the center of the lens array 40 may be equal to the radius of curvature of the entrance surface 44a of the first lens 44B, the second lens 44G, and the third lens 44R in the outer periphery of the lens array 40 in each of the X-axis and Y-axis. In that case, the refractive index of the material of the first lens 44B, the second lens 44G, and the third lens 44R in the center of the lens array 40 is higher than the refractive index of the material of the first lens 44B, the second lens 44G, and the third lens 44R in the outer periphery of the lens array 40. As a result, the positive power of the microlenses 42 arranged in the outer periphery of the lens array 40 becomes stronger than the positive power of the microlenses 42 arranged in the center, and the illuminance distribution of the image lights IM1 and IM2 emitted from the light modulation device 50 in the XY plane can be made uniform.

[0185] Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to such specific embodiments, and various modifications and changes are possible within the scope of the gist of the present invention described in the claims.

[0186] For example, in the projector 301 of the embodiment described above, the red filter 54R, the green filter 54G, and the blue filter 54B in the color filter 52 of the light modulation device 50 have the same shapes, widths XR, XG, and XB, widths YR, YG, and YB, and areas when viewed along the Z axis. Also, in the projector 301 of the embodiment described above, the red filter 54R, the green filter 54G, and the blue filter 54B are arranged in a so-called stripe manner. However, the shapes and areas of the red filter 54R, the green filter 54G, and the blue filter 54B in the color filter 52, and the relative arrangement of these color filters are not limited to a specific type and may be changed as appropriate.

[0187] For example, in the color filter 52 of the light modulation device 50, the red filter 54R, the green filter 54G, and the blue filter 54B may be arranged in, for example, a mosaic type, a pentile type, a diamond pentile type, or any other type. Regardless of the type in which the red filter 54R, the green filter 54G, and the blue filter 54B are arranged, the arrangement and width including the presence or absence of a light-shielding region are taken into consideration, and it is sufficient that the area of ​​the entrance surface 44a and the exit surface 44b of the second lens 44G of the lens array 40 is larger than the area of ​​the entrance surface 54a of the green filter 54G of the color filter 52 and is larger than the area of ​​each of the entrance surface 44a and the exit surface 44b of the first lens 44B and the third lens 44R. In addition, in accordance with the relative arrangement of the red filter 54R, the green filter 54G, and the blue filter 54B, and the third lens 44R, the second lens 44G, and the first lens 44B, the second lens 44G may be decentered, and at least one of the first lens 44B and the third lens 44R may not be decentered.

[0188] In the projector 301 of the above-described embodiment, the optical axis AX of the white light WL1, WL2 and the image light IM1, IM2 between the light source device 10 and the projection optical system 90 is parallel to the Z axis, and each component is arranged in a straight line along the Z axis. However, the optical axis AX may be appropriately refracted depending on the design constraints of the projector, the installation environment, etc.

[0189] [Summary of this disclosure] The following is a summary of this disclosure. (Note 1) A light source device that emits white light containing blue light, green light, and red light; a lens array that is disposed on an optical path of the white light emitted from the light source device and has a plurality of lenses; a color filter that is disposed on the optical path of the white light emitted from the lens array and includes a blue filter that transmits the blue light, a green filter that transmits the green light, and a red filter that transmits the red light; a blue sub-pixel electrode that is disposed opposite the color filter and modulates the blue light that transmits the blue filter in accordance with image information to emit blue image light; and a green sub-pixel electrode that modulates the green light that transmits the green filter in accordance with image information to emit green image light. a pixel electrode including a red sub-pixel electrode that modulates the red light passing through a red filter in accordance with image information and emits red image light; and a projection optical system that is arranged on paths of the blue, green, and red image lights and projects the blue, green, and red image lights, wherein the multiple lenses include a first lens that emits the white light toward the blue filter, a second lens that emits the white light toward the green filter, and a third lens that emits the white light toward the red filter, and an area of ​​the second lens is larger than an area of ​​the green filter and is larger than an area of ​​the first lens and an area of ​​the third lens.

[0190] The configuration of Supplementary Note 1 makes it possible to make the amount of green image light contained in the image light emitted from the light modulation device greater than the amount of each of the blue image light and the red image light. According to the configuration of Supplementary Note 1, the illuminance ratio of the red, green, and blue image light in the projected image or video can be adjusted to the visual sensitivity of the human who observes the image or video, thereby realizing an image or video that is perceived brighter than that of a conventional projector.

[0191] (Appendix 2) The projector of Appendix 1, wherein the first lens, the second lens, and the third lens are arranged along a second axis in a plane intersecting a first axis parallel to the optical axis of the white light incident on the lens array, and a third axis perpendicular to the second axis, and on the second axis, the width of the second lens is greater than the width of the first lens and the width of the third lens.

[0192] With the configuration of Supplementary Note 2, on the second axis, the amount of white light taken into the second lens can be made greater than the amount of white light taken into each of the first lens and the third lens.

[0193] (Supplementary Note 3) The projector of Supplementary Note 2, wherein on the third axis, the width of the second lens is greater than the width of the first lens and the width of the third lens.

[0194] With the configuration of Supplementary Note 3, the amount of white light taken into the second lens can be increased on the third axis as well as on the second axis, compared to the amount of white light taken into each of the first lens and the third lens.

[0195] (Appendix 4) Any one of appendices 1 to 3, wherein the first lens, the second lens, and the third lens are arranged along a second axis in a plane intersecting a first axis parallel to the optical axis of the white light incident on the lens array, and a third axis perpendicular to the second axis, and on the third axis, the width of the second lens is greater than the width of the first lens and the width of the third lens.

[0196] With the configuration of Supplementary Note 4, on the third axis, the amount of white light taken into the second lens can be made greater than the amount of white light taken into each of the first lens and the third lens.

[0197] (Appendix 5) A projector as claimed in Appendix 1, wherein when viewed along a first axis parallel to the optical axis of the white light incident on the lens array, a portion of the second lens overlaps with at least one of the blue filter and the red filter.

[0198] The configuration of Supplementary Note 5 increases the amount of white light incident on the green filter and decreases the amount of white light incident on at least one of the red filter and the blue filter according to the area of ​​a portion of the second lens. The configuration of Supplementary Note 5 makes it possible to easily adjust the difference between the amount of green light transmitted through the green filter and at least one of the amount of red light transmitted through the red filter and the amount of blue light transmitted through the blue filter.

[0199] (Appendix 6) Any one of appendices 1 to 5, wherein when viewed along a first axis parallel to the optical axis of the white light incident on the lens array, a portion of the second lens that overlaps with the green filter has no power, and a portion of the second lens that does not overlap with the green filter has positive power.

[0200] In the configuration of Supplementary Note 6, the white light incident on the portion of the second lens that overlaps with the green filter when viewed along the first axis travels along the first axis and enters the green filter. The white light incident on the portion of the second lens that does not overlap with the green filter when viewed along the first axis is collected on the first axis and enters the green filter. For each type of white light, the green light that passes through the green filter enters the green subpixel filter of the pixel electrode. Therefore, the configuration of Supplementary Note 6 allows the green light to efficiently enter the green subpixel electrode, similar to the configuration in which the entire second lens has positive power. In addition, the configuration of Supplementary Note 6 allows the second lens to be made thinner than when the entire second lens has positive power. In addition, the configuration of Supplementary Note 6 allows the light intensity incident on the green subpixel electrode to be distributed throughout the entire subpixel electrode, thereby reducing the load on the subpixel electrode due to green light that has a locally high light intensity.

[0201] (Supplementary Note 7) Any one of Supplementary Notes 1 to 5, wherein the color filter has a light-shielding area that blocks the white light between any of the adjacent red, green, and blue filters.

[0202] In the configuration of Supplementary Note 7, the widths of the first lens, the second lens, and the third lens can be set so that the ends of the first lens, the second lens, and the third lens overlap the light-shielding region when viewed along the Z axis. This allows the white light that would be irradiated onto the light-shielding region and not used as image light without the first lens, the second lens, and the third lens to pass through a blue filter, a green filter, and a red filter using each lens, and to be incident on a blue subpixel electrode, a green subpixel electrode, and a red subpixel electrode, thereby increasing the amount of color light converted into image light by each subpixel electrode. The configuration of Supplementary Note 7 allows for an increased degree of freedom in adjusting the spectrum of the image light emitted from the light modulation device and projected.

[0203] (Appendix 8) The projector of Appendix 7, wherein the red filter, the green filter, and the blue filter are arranged along a second axis in a plane intersecting a first axis parallel to an optical axis of the white light incident on the color filter and a third axis perpendicular to the second axis, and the light-shielding regions are arranged in a region extending parallel to the third axis between any of the first lens, the second lens, and the third lens that are adjacent to each other on the second axis, a region extending parallel to the second axis between any of the first lens, the second lens, and the third lens that are adjacent to each other on the third axis, a region extending parallel to the second axis at a periphery of the color filter, and a region extending parallel to the second axis and a region extending parallel to the third axis, and a width along the third axis of the light-shielding region extending parallel to the second axis is larger than a width along the second axis of the light-shielding region extending parallel to the third axis, and the first lens, the second lens, and the third lens have power on the third axis.

[0204] The configuration of Supplementary Note 8 ensures that the adjustable width of each of the first lens, the second lens, and the third lens on the third axis is greater than the adjustable width on the second axis. The configuration of Supplementary Note 8 allows white light incident on a region of the color filter that overlaps with the light-shielding region along the third axis wider than the width along the second axis when viewed along the first axis to be taken in by each of the first lens, the second lens, and the third lens, and concentrated on the blue filter, the green filter, and the red filter of the color filter, and the blue subpixel electrode, the green subpixel electrode, and the red subpixel electrode of the pixel electrode. As a result, the brightness of the image light emitted from the light modulation device is improved.

[0205] (Appendix 9) Any one of appendices 1 to 8, wherein when viewed along a first axis parallel to the optical axis of the white light incident on the lens array, the principal point of the first lens overlaps with the center of the blue filter, the principal point of the second lens overlaps with the center of the green filter, and the principal point of the third lens overlaps with the center of the red filter.

[0206] The configuration of Supplementary Note 9 allows blue light contained in the white light emitted from the first lens to be efficiently incident on the blue subpixel electrode. Green light contained in the white light emitted from the second lens to be efficiently incident on the green subpixel electrode. Red light contained in the white light emitted from the third lens to be efficiently incident on the red subpixel electrode. As a result, the brightness of the image light emitted from the light modulation device is improved. [Explanation of symbols]

[0207] 10...light source device, 40...lens array, 42...microlens (lens), 44B...first lens, 44G...second lens, 44R...third lens, 50...light modulation device, 52...color filter, 54B...blue filter, 54G...green filter, 54R...red filter, 62...pixel electrode, 66B...blue subpixel electrode, 66G...green subpixel electrode, 66R...red subpixel electrode, 90...projection optical system, 301...projector.

Claims

1. a light source device that emits white light including blue light, green light, and red light; a lens array having a plurality of lenses, the lens array being disposed on an optical path of the white light emitted from the light source device; a color filter disposed on an optical path of the white light emitted from the lens array, the color filter including a blue filter that transmits the blue light, a green filter that transmits the green light, and a red filter that transmits the red light; a pixel electrode arranged to face the color filter, the pixel electrode including: a blue subpixel electrode that modulates the blue light transmitted through the blue filter in accordance with image information to emit blue image light; a green subpixel electrode that modulates the green light transmitted through the green filter in accordance with image information to emit green image light; and a red subpixel electrode that modulates the red light transmitted through the red filter in accordance with image information to emit red image light; a projection optical system that is disposed on paths of the blue image light, the green image light, and the red image light, and projects the blue image light, the green image light, and the red image light; Equipped with the plurality of lenses include a first lens that emits the white light toward the blue filter, a second lens that emits the white light toward the green filter, and a third lens that emits the white light toward the red filter; The area of ​​the second lens is larger than the area of ​​the green filter and is larger than the area of ​​the first lens and the area of ​​the third lens; When viewed along a first axis parallel to an optical axis of the white light incident on the lens array, a portion of the second lens that overlaps with the green filter has no power, and a portion of the second lens that does not overlap with the green filter has positive power. projector.

2. A light source device that emits white light including blue light, green light, and red light; a lens array having a plurality of lenses, the lens array being disposed on an optical path of the white light emitted from the light source device; a color filter disposed on an optical path of the white light emitted from the lens array, the color filter including a blue filter that transmits the blue light, a green filter that transmits the green light, and a red filter that transmits the red light; a pixel electrode arranged to face the color filter, the pixel electrode including: a blue subpixel electrode that modulates the blue light transmitted through the blue filter in accordance with image information to emit blue image light; a green subpixel electrode that modulates the green light transmitted through the green filter in accordance with image information to emit green image light; and a red subpixel electrode that modulates the red light transmitted through the red filter in accordance with image information to emit red image light; a projection optical system that is disposed on paths of the blue image light, the green image light, and the red image light, and projects the blue image light, the green image light, and the red image light; Equipped with the plurality of lenses include a first lens that emits the white light toward the blue filter, a second lens that emits the white light toward the green filter, and a third lens that emits the white light toward the red filter; The area of ​​the second lens is larger than the area of ​​the green filter and is larger than the area of ​​the first lens and the area of ​​the third lens; the color filter has a light-shielding region for blocking the white light between any of the red filter, the green filter, and the blue filter that are adjacent to each other; projector.

3. the red filter, the green filter, and the blue filter are arranged along a second axis in a plane intersecting a first axis parallel to an optical axis of the white light incident on the color filters, and a third axis perpendicular to the second axis; the light-shielding regions are arranged in a region extending parallel to the third axis between any of the first lens, the second lens, and the third lens adjacent to each other on the second axis, a region extending parallel to the second axis between any of the first lens, the second lens, and the third lens adjacent to each other on the third axis, a region extending parallel to the second axis at a periphery of the color filter, and a region extending parallel to the second axis and a region extending parallel to the third axis, a width of the light blocking region extending parallel to the second axis on the third axis is greater than a width of the light blocking region extending parallel to the third axis on the second axis; the first lens, the second lens, and the third lens have power on the third axis; The projector according to claim 2 .

4. A light source device that emits white light including blue light, green light, and red light; a lens array having a plurality of lenses, the lens array being disposed on an optical path of the white light emitted from the light source device; a color filter disposed on an optical path of the white light emitted from the lens array, the color filter including a blue filter that transmits the blue light, a green filter that transmits the green light, and a red filter that transmits the red light; a pixel electrode arranged to face the color filter, the pixel electrode including: a blue subpixel electrode that modulates the blue light transmitted through the blue filter in accordance with image information to emit blue image light; a green subpixel electrode that modulates the green light transmitted through the green filter in accordance with image information to emit green image light; and a red subpixel electrode that modulates the red light transmitted through the red filter in accordance with image information to emit red image light; a projection optical system that is disposed on paths of the blue image light, the green image light, and the red image light, and projects the blue image light, the green image light, and the red image light; Equipped with the plurality of lenses include a first lens that emits the white light toward the blue filter, a second lens that emits the white light toward the green filter, and a third lens that emits the white light toward the red filter; The area of ​​the second lens is larger than the area of ​​the green filter and is larger than the area of ​​the first lens and the area of ​​the third lens; When viewed along a first axis parallel to the optical axis of the white light incident on the lens array, The principal point of the first lens overlaps with the center of the blue filter, The principal point of the second lens overlaps with the center of the green filter, The principal point of the third lens overlaps with the center of the red filter. projector.

5. The first lens, the second lens, and the third lens are arranged along a second axis in a plane intersecting a first axis parallel to an optical axis of the white light incident on the lens array, and a third axis perpendicular to the second axis; On the second axis, the width of the second lens is greater than the width of the first lens and the width of the third lens. The projector according to claim 1 .

6. On the third axis, the width of the second lens is greater than the width of the first lens and the width of the third lens. The projector according to claim 5 .

7. The first lens, the second lens, and the third lens are arranged along a second axis in a plane intersecting a first axis parallel to an optical axis of the white light incident on the lens array, and a third axis perpendicular to the second axis; On the third axis, the width of the second lens is greater than the width of the first lens and the width of the third lens. The projector according to claim 1 .

8. When viewed along a first axis parallel to an optical axis of the white light incident on the lens array, a portion of the second lens overlaps with at least one of the blue filter and the red filter. The projector according to claim 1 .

Images