JP2002071934A - Illuminator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an illuminator suitable for improving the color reproducibility of a spatial light modulator provided with a hologram color filter. SOLUTION: The spatial light modulator 1 is provided with the hologram color filter 91 which diffracts three primary color rays and emits them in respectively specified directions, pixels 923R, 923G, 923B arranged in the emission directions with corresponding colors and an optical modulation layer 925 arranged between the hologram color filter 91 and the pixels 923R, 923G, 923B. The illuminator makes the three primary color rays incident on the spatial light modulator 1 with respectively specified incident angles and is provided with a desired band cut filter 8 in an optical path generating a ray with an angle larger or smaller than the specified incident angle.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an illumination device applied to a spatial light modulator provided with a hologram color filter, and more particularly to an arrangement of a band cut filter inserted for improving color reproduction.

[0002]

2. Description of the Related Art In recent years, there has been an increasing number of occasions in which a projection display device is used for the purpose of enlarging and displaying a computer image for presentation purposes and for enjoying a powerful large-screen video image for home theater applications. Generally, projection display devices are classified into two types. One is a so-called three-panel projection display device provided with three spatial light modulators corresponding to RGB three primary colors for the purpose of realizing high luminance and high resolution, and the other is a low-cost projection display device. This is a so-called single-panel projection display device provided with three pixels corresponding to three primary colors of RGB in one spatial light modulation element for the purpose of realization.

As a color separation means in a three-panel projection display device, a wavelength-selective reflection mirror (dichroic mirror) is usually used, and white light emitted from a light source is converted to red (R) light.
The component, the green (G) component and the blue (B) component are separated and guided to the corresponding color spatial light modulator. Therefore,
The three-panel projection display device has a feature that high luminance can be easily realized because the three primary color light components included in the white light emitted from the light source are used for display with almost no loss.

On the other hand, as a color separation means in a single-panel projection display device, an absorption type color filter is usually used, and an RGB color filter is arranged on a pixel of a corresponding color so that only a color light component of the corresponding color is provided. And let the other color components
The light is absorbed by the color filter and removed. Therefore, two-thirds of the three primary colors emitted from the light source are wasted by the color filters. For this reason, it has been difficult for the single-panel projection display device to achieve high luminance.

In order to solve this problem, the present applicant has proposed the use of a hologram color filter as a color separation means, and has proposed a single-panel projection display device having a hologram color filter as Japanese Patent Application No. 10-113895. did.
FIG. 9 is a schematic view of a spatial light modulator provided with a hologram color filter previously proposed by the present applicant. 9, reference numeral 90 denotes a spatial light modulator, which has a configuration in which a hologram color filter 91 and a reflective spatial light modulator 92 are stacked. Hologram color filter 91
Is provided with a hologram lens layer 912 in which striped hologram lenses 912a are arranged at a predetermined pitch on a transparent glass substrate 911.

The reflection type spatial light modulator 92 has an active matrix driving circuit 92 on a silicon substrate 921.
2, a pixel electrode layer 923 including an R pixel electrode 923R, a G pixel electrode 923G, and a B pixel electrode 923B, and a first alignment film 9
24, a light modulation layer 925, a second alignment film 926, and a transparent electrode substrate 928 provided with a transparent electrode layer 927. As shown in FIG. 8, when reading light of RGB is incident on the hologram lens layer 912 through the transparent glass substrate 911 at a predetermined angle, the reading light is transmitted to the hologram lens 91 of the hologram lens layer 912.
2a, and exits the hologram color filter 91 at a diffraction angle corresponding to the incident angle and the wavelength.
Pixel electrode 923R, G pixel electrode 923G, B pixel electrode 9
The light is condensed on 23B and is reflected here.

When the read light passes through the light modulation layer 925, it is subjected to light modulation according to the video signal of the corresponding color. That is, the plane of polarization of the reading light rotates according to the video signal.

On the other hand, the hologram color filter 91 is
It has a function of mainly diffracting an S-polarized wave and transmitting a P-polarized wave without being diffracted. Therefore, when an S-polarized wave is applied as the readout light, the readout light that has been subjected to the light modulation includes a P-polarized wave.
The polarized wave is transmitted through the hologram color filter 91 without being diffracted, and a color image is projected.

[0009]

By the way, as described above, the diffraction and emission directions of the light incident on the hologram color filter 91 differ depending on the wavelength and the incident angle of the incident light. That is, a light beam incident at a predetermined incident angle is diffracted and emitted in a predetermined direction according to the wavelength. In particular, when the incident light has a desired band, the diffracted outgoing light becomes a light beam that spreads in a fan shape with wavelength dispersion.

FIG. 10 is a schematic diagram showing a state in which the diffracted emission light is wavelength-dispersed and spreads in a fan shape. In FIG. 10, a hologram 912a has a diffraction grating formed so that a light beam incident at a predetermined incident angle θ ₀ is transmitted and diffracted in the surface normal direction of the hologram lens 912a and emitted. The hologram lens 912a has a predetermined incident angle θ _0.
When light having a predetermined wavelength band is made incident thereon, the diffracted outgoing light becomes a light beam that is wavelength-dispersed and spreads to the left and right as shown by hatching in the figure (in the case of FIG. 10, The left is the short wavelength side and the right is the long wavelength side).

Here, when the incident light is not perfectly parallel but has a cone angle, the incident angle θ ₁ or the incident angle θ ₂
Will also be present. In this case, the predetermined incident angle θ
_In consideration of the diffraction efficiency, the outgoing direction of the light incident at an incident angle θ ₁ smaller than ₀ shifts to the longer wavelength side in FIG.
In the direction indicated by the hatching downward to the right.

On the other hand, the outgoing direction of the light incident at an incident angle θ ₂ larger than the incident angle θ ₀ shifts to the short wavelength side, and
, The direction is indicated by hatching falling left.
Therefore, for example, in the case of FIG. 10, the short-wavelength component of the incident light is mixed in the pixel electrode arranged on the left of the predetermined pixel electrode, and the pixel electrode on the right is mixed with the predetermined pixel electrode. Long wavelength components will be mixed. As a result, there is a problem that color mixing occurs and the image quality is degraded.

More specifically, FIG. 11 shows a pixel electrode layer 923 when an ultra-high pressure mercury lamp is used as a light source.
4 shows the spectrum of each color of RGB on the surface. The problem of color mixing in this application example is an increase in the short wavelength component of the B light mixed into the R pixel electrode 923R and the yellow component that is the long wavelength component of the G light itself. Therefore, the present invention has been made in view of the above problems, and has as its object to provide a lighting device suitable for improving color reproduction of a spatial light modulator provided with a hologram color filter.

[0014]

According to a first aspect of the present invention, there is provided a hologram color filter which diffracts three primary color lights and emits the light in predetermined directions, a pixel electrode of a corresponding color arranged in the emission direction, and An illumination device for causing the three primary color lights to enter at a predetermined incident angle with respect to a spatial light modulation device having a light modulation layer provided between the hologram color filter and the pixel electrode, A blue band cut filter disposed in an optical path for generating a light ray having an angle larger than the incident angle, or a yellow band cut filter disposed in an optical path for generating a light ray having an angle smaller than the predetermined incident angle. A lighting device characterized by the following. According to a second aspect of the present invention, a hologram color filter that diffracts the three primary color lights and emits the light in predetermined directions, a pixel electrode of a corresponding color disposed in the emission direction, and a hologram color filter and the pixel electrode An illumination device for causing the three primary color lights to enter at a predetermined incident angle with respect to a spatial light modulating device having a light modulation layer provided therein, wherein the optical path generates a light beam having an angle larger than the predetermined incident angle. An illumination device comprising: a blue band cut filter disposed therein; and a yellow band cut filter disposed in an optical path for generating a light beam having an angle smaller than the predetermined incident angle. The third invention is
A light source, a hologram color filter that diffracts the three primary color lights and emits the light in predetermined directions, a pixel electrode of a corresponding color arranged in the emission direction, and a light source provided between the hologram color filter and the pixel electrode. A spatial light modulator having a light modulating layer, a first lens array sequentially arranged from the light source side between the light source and the spatial light modulator, a second lens array, and a condenser lens. A lighting device for causing the three primary color lights to enter the spatial light modulation device at a predetermined incident angle, wherein a light beam having an incident angle of a color light component of the three primary color lights larger than the predetermined angle is used. A blue band cut filter disposed over the corresponding lens segment of the first lens array to be generated, or light having an incident angle of a color light component of the three primary color lights smaller than the predetermined angle. To provide a lighting apparatus characterized by having a yellow band cut filter disposed over the corresponding lens segments of the second lens array that generates. A fourth invention provides a light source, a hologram color filter that diffracts three primary color lights and emits the light in predetermined directions, a pixel electrode of a corresponding color arranged in the emission direction, the hologram color filter and the pixel electrode. A spatial light modulation device having a light modulation layer provided between,
A first lens array, a second lens array, and a condenser lens sequentially arranged from the light source side between the light source and the spatial light modulator; An illumination device for emitting primary color light at the predetermined incident angle, wherein the blue band cut filter is disposed over a corresponding lens segment of the first lens array that generates a light ray larger than the predetermined incident angle. And a yellow band cut filter disposed over a corresponding lens segment of the second lens array that generates a light ray smaller than the predetermined angle of incidence.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG.
This will be described with reference to FIGS. First, FIGS. 1 and 2
The outline of an illumination device applied to a spatial light modulator provided with a hologram color filter will be described below. FIG.
FIG. 2 is a plan view showing a schematic configuration of a lighting device. FIG.
FIG. 3 is a schematic plan view illustrating the principle of generating a cone angle component in illumination light. As shown in FIG. 1, the lighting device includes:
A spatial light modulator 1, a light source 2, a collimator lens 3 for converting convergent light emitted from the light source 2 side into a parallel light between the spatial light modulator 1 and the light source 2, and a spatial light modulator 1 , A color separation unit 5 for separating white light emitted from the light source 2 into three primary colors of RGB, and a condenser lens 6.
The spatial light modulator 1 arranged at an angle to the optical axis of the illumination device is illuminated from an oblique direction.

The integrator 4 includes a first lens array 41 having a plurality of lens segments having end surfaces corresponding to the shape of the illumination area of the spatial light modulator 1, and a lens segment of the first lens array 41. Lens array 4 having lens segments corresponding to
The second lens array 42 has an effect of forming an image of the lens segment of the first lens array 41 at a position of the virtual illumination target 7 perpendicular to the optical axis of the illumination device.

Further, the color separating means 5 includes a G dichroic mirror 5R on the outermost surface as an R dichroic mirror 5R.
The G and B dichroic mirrors 5B are arranged in a stacked manner with a predetermined spacing therebetween. Note that a broadband reflection mirror may be provided instead of the B dichroic mirror 5B.

Here, the manner in which white light is color-separated into three primary colors of RGB and enters the spatial light modulator 1 at a predetermined incident angle will be described. The white light emitted from the integrator 4 enters the R dichroic mirror 5R of the color separation means 5, where only the R light is selectively reflected. Next, R
Of the G light and the B light transmitted through the dichroic mirror 5R, the G light is reflected by the G dichroic mirror 5G, and the B light transmitted through the G dichroic mirror 5G is reflected by the B dichroic mirror 5B. In this way,
The white light is decomposed into the three primary colors of RGB, and
Is emitted.

Next, the color-separated light of the three primary colors enters the condenser lens 6. Here, the incident position of the principal ray of each color light on the condenser lens 6 is different. That is, the principal ray of the G light coincides with the optical axis of the condenser lens 6 at the point a, the principal ray of the B light is at the point b above the point a, and the principal ray of the R light is at the point a. Also enter the lower point c. The condensing lens 6 is arranged so as to converge the parallel light to the point d of the spatial light modulator 1, so that each principal ray of the RGB light emitted from the condensing lens 6 is Each is incident on a point d.
Therefore, the incident angle of each color light with respect to the surface normal P of the spatial light modulator 1 is α ₀ for G light, α ₁ for B light, and R ₁ for R light.
It becomes α ₂ for light, and each has a different incident angle.

Next, the principle of generating the cone angle component will be described with reference to FIG. The same components as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted. In addition,
In FIG. 2, the color separation means is omitted for convenience of explanation. In FIG. 2, the first lens array 41 includes lens segments 41a, 41b, and 41c (here, 3
(Shown by two lens segments) in an array.
The lens segments 42a, 42b, 42c are provided in an array corresponding to the lens segments 41a, 41b, 41c. The focus positions of the lens segments 41a, 41b, 41c of the first lens array 41 are set near the surfaces of the corresponding lens segments 42a, 42b, 42c of the second lens array 42.

In such a configuration, when light is incident on the first lens array 41, firstly, the light emitted from the central lens segment 41a converges near the surface of the corresponding lens segment 42a of the second lens array. Light.
Then, an image of the end face of the lens segment 41a is formed at the position of the virtual illumination target 7 by the light beam emitted from the lens segment 42a. Similarly, end images of the lens segments 41 b and 41 c are formed at the position of the virtual illumination target 7. By the way, since the condensing lens 6 arranged on the emission side of the second lens array 42 condenses the parallel light to the point d of the spatial light modulator 1 as described above,
The end face images of the lens segments 41a, 41b, 41c are
The condensing lens 6 forms an image at the position of the virtual illumination target 7 so as to overlap with each other.

Therefore, assuming that the incident angle of the principal ray having passed through the central lens segment 41a of the first lens array 41 with respect to the spatial light modulator 1 is θ ₀ , the principal ray has entered the spatial light modulator 1 through the lens segment 41b. The incident angle of the principal ray is θ ₁ smaller than θ ₀ . Further, the angle of incidence of the chief ray incident on the spatial light modulator 1 passes through the lens segments 41c becomes larger theta ₂ of angle than theta _0. As described above, the light beam that has passed through the lens segments around the first lens array 41 causes the light beam incident on the spatial light modulator 1 to have an angle component other than the predetermined incident angle θ ₀ ,
A so-called cone angle component is generated.

Next, FIG. 3 shows the first embodiment of the present invention.
This will be described with reference to FIGS. FIG. 3 is a schematic plan view showing a main part of the lighting device according to the first embodiment of the present invention. FIG. 4 is a diagram illustrating the spectral characteristics of the blue cut filter applied to the first embodiment of the present invention. FIG. 5 is a diagram showing a comparison of spectral characteristics of B light on the surface of the pixel electrode broom of the spatial light modulator before and after the illumination device according to the first embodiment of the present invention is applied. The same components as those in FIG. 2 are denoted by the same reference numerals, and description thereof will be omitted.

The first embodiment of the present invention shows a configuration for removing a cone angle component having an incident angle larger than a predetermined incident angle. In FIG. 3, reference numeral 8 denotes a band cut filter, which has a function of selectively absorbing and removing light beams in a predetermined wavelength band. The band cut filter 8 is disposed so as to cover a corresponding lens segment (the lens segment 41c in FIG. 3) of the first lens array 41 that generates a cone angle component larger than a predetermined angle of incidence on the spatial light modulator 1. I have.

Here, R which is a problem in the prior art is
A solution to the mixing of the short wavelength component of the B light into the pixel electrode 923R will be described with reference to the application of the first embodiment of the present invention. As described above, the reason that the B light component is mixed into the R pixel electrode 923R is that the diffraction and emission direction of the B light is partially changed due to the presence of the B light incident on the hologram color filter at an angle larger than the predetermined incident angle. This is because the wavelength shifts to the short wavelength side, and as a result, the short wavelength component of the B light is mixed into the adjacent R pixel electrode 923R (see FIGS. 10 and 11).

Therefore, in order to solve the above-mentioned problem of the conventional example, as a band cut filter 8 in FIG. 3, for example, a spectral filter as shown in FIG. What is necessary is just to apply the blue cut filter which has a characteristic. This removes the short-wavelength component of the B light with respect to the light beam (shown by a broken line in the drawing) having an incident angle θ ₂ larger than the predetermined incident angle θ ₀ of the B light. The mixing of the short wavelength component of the B light into the R pixel electrode 923R is prevented, and the color reproduction of the B light is improved.

As shown in FIG. 5, it was confirmed that the application of the first embodiment of the present invention reduced the mixing of the short wavelength component of the B light into the R pixel electrode 923R. In FIG. 5, the thin line is before application of the first embodiment of the present invention, and the thick line is after application.

(Specific Example of First Embodiment) Next, a specific example of the first embodiment of the present invention will be described.
According to the illumination device designed by the present inventors, the incident angle of the B light with respect to the spatial light modulator 1 is 49
° to 59 °. The blue cut filter shown in FIG.
The corresponding lens segment of the first lens array 41 that generates a cone angle component of ° -59 ° was covered, and the short wavelength component of B light was cut. As a result, the xy chromaticity of the R light is (0.
582, 0.329) to (0.594, 0.345)
And the color reproduction of the R light was improved.

Next, a second embodiment of the present invention will be described with reference to FIGS. FIG. 6 shows a second embodiment of the present invention.
It is an outline top view showing the important section of the lighting installation concerning an embodiment. FIG. 7 is a diagram illustrating the spectral characteristics of the yellow cut filter applied to the second embodiment of the present invention. FIG.
It is a figure showing comparison of G light of the pixel electrode layer surface of the spatial light modulator before and after application of the lighting device of a 1st embodiment of the present invention. The same components as those in FIG. 2 are denoted by the same reference numerals, and description thereof will be omitted. Here, only portions different from FIG. 3 will be described.

The second embodiment of the present invention shows a configuration for removing a cone angle component having an incident angle smaller than a predetermined incident angle. In FIG. 6, reference numeral 9 denotes a band cut filter, which has a function of selectively absorbing and removing light beams in a predetermined wavelength band. The band cut filter 9 is disposed so as to cover the corresponding lens segment (the lens segment 41b in FIG. 6) of the first lens array 41 that generates a cone angle component smaller than a predetermined incident angle with respect to the spatial light modulator 1. ing.

Here, G which is a problem in the prior art is used.
A solution to the increase in the yellow component, which is the long wavelength component of the G light itself, in the pixel electrode 923G will be described with reference to the application of the second embodiment of the present invention. As described above, the yellow component of the G light increases due to the presence of the G light incident on the hologram color filter at an angle smaller than the predetermined incident angle, and the diffracted emission direction of the G light is partially changed to the long wavelength side. , And as a result, the yellow component which is a long-wavelength component of the G light increases (see FIGS. 10 and 11).

Therefore, in order to solve the problem of the conventional example, the band cut filter 9 shown in FIG.
What is necessary is just to apply the yellow cut filter which has a spectral characteristic as shown in FIG. 7 which removes the wavelength component of 0 nm. As a result, with respect to a light beam having an incident angle θ ₁ smaller than the predetermined incident angle θ ₀ of the G light (shown by a broken line in the drawing), the yellow component of the long wavelength component of the G light is removed, and the color reproduction of the G light is improved. You.

As shown in FIG. 8, it was confirmed that the application of the second embodiment of the present invention reduced the yellow component in the spectral characteristics of the G light. The R light partially including the yellow component was not affected by the application of the yellow cut filter. In FIG. 8, the thin line is before application of the second embodiment of the present invention, and the thick line is after application.

(Specific Example of Second Embodiment) Next, a specific example of the second embodiment of the present invention will be described.
According to the lighting device designed by the inventor, the incident angle of the G light with respect to the spatial light modulator is 55 ° around 60 °.
~ 67 ° distributed. Applying the yellow cut filter shown in FIG.
The corresponding lens segment of the first lens array 41 that generates a cone angle component of 5 ° to 58 ° was covered, and the yellow component of the G light was cut. As a result, when the xy chromaticity of the G light is compared before and after the application of the yellow cut filter,
(0.270, 0.565) to (0.278, 0.6
05), and the color reproduction of G light was improved. The band cut filter 8 according to the first embodiment of the present invention covers the lens segment 41c of the first lens array, and the band cut filter 9 according to the second embodiment of the present invention covers the lens segment 41b of the first lens array. It may be arranged in such a manner.

[0035]

As described in detail above, the present invention provides
An illuminating device in which three primary color lights of RGB are respectively incident at a predetermined incident angle with respect to a spatial light modulation device provided with a hologram color filter, and in an optical path for generating a light beam having an angle larger than the predetermined incident angle. And a yellow band cut filter disposed in an optical path for generating a light ray having an angle smaller than the predetermined angle of incidence, which has been a problem in the related art. Has been solved, and it has become possible to provide a projection display device excellent in color reproduction.

[Brief description of the drawings]

FIG. 1 is a plan view showing a schematic configuration of a lighting device.

FIG. 2 is a schematic plan view illustrating a principle of generating a cone angle component in illumination light.

FIG. 3 is a schematic plan view illustrating a main part of the lighting device according to the first embodiment of the present invention.

FIG. 4 is a diagram illustrating spectral characteristics of a blue cut filter applied to the first embodiment of the present invention.

FIG. 5 is a diagram illustrating a comparison of spectral characteristics of B light on a pixel electrode broom surface of a spatial light modulator before and after application of the illumination device according to the first embodiment of the present invention.

FIG. 6 is a schematic plan view illustrating a main part of a lighting device according to a second embodiment of the present invention.

FIG. 7 is a diagram illustrating spectral characteristics of a yellow cut filter applied to a second embodiment of the present invention.

FIG. 8 is a diagram showing a comparison of G light on the pixel electrode layer surface of the spatial light modulator before and after application of the illumination device according to the first embodiment of the present invention.

FIG. 9 is a schematic diagram of a spatial light modulator including a hologram color filter previously proposed by the present applicant.

FIG. 10 is a schematic diagram showing a state in which the diffracted emission light is wavelength-dispersed and spreads in a fan shape.

FIG. 11 is a diagram showing RGB spectral characteristics on the surface of a pixel electrode layer when a conventional lighting device is applied.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Spatial light modulator, 2 ... Light source, 6 ... Condensing lens, 7 ...
Virtual illumination target, 8, 9 band cut filter, 41 first lens array, 42 second lens array, 41a, 4
1b, 41c: lens segment, 91: hologram color filter, 912a: hologram lens, 92: reflective spatial light modulator, 923: pixel electrode layer, 923R ...
R pixel electrode (pixel electrode), 923G ... G pixel electrode (pixel electrode), 923B ... G pixel electrode (pixel electrode), 925 ...
Light modulation layer

Continued on front page F term (reference) 2H048 BA01 BA64 BB02 BB22 BB42 CA01 CA14 CA19 CA24 2H049 CA01 CA05 CA08 CA11 CA15 CA22 2H052 BA02 BA06 BA11

Claims (4)

[Claims] 1. A hologram color filter that diffracts three primary color lights and emits the light in predetermined directions, a pixel electrode of a corresponding color arranged in the emission direction, and a light source provided between the hologram color filter and the pixel electrode. A spatial light modulation device having a light modulation layer provided thereon, and the three primary color lights are incident at a predetermined incident angle, wherein the light path generates an optical ray having an angle larger than the predetermined incident angle. Or a yellow band cut filter disposed in an optical path for generating a light beam having an angle smaller than the predetermined incident angle. 2. A hologram color filter which diffracts three primary color lights and emits the light in respective predetermined directions, a pixel electrode of a corresponding color arranged in the emission direction, and a light source provided between the hologram color filter and the pixel electrode. A spatial light modulation device having a light modulation layer provided thereon, and the three primary color lights are incident at a predetermined incident angle, wherein the light path generates an optical ray having an angle larger than the predetermined incident angle. And a yellow band cut filter disposed in an optical path for generating a light ray having an angle smaller than the predetermined incident angle. 3. A light source, a hologram color filter that diffracts three primary color lights and emits the light in predetermined directions, a pixel electrode of a corresponding color arranged in the emission direction, and the hologram color filter and the pixel electrode. A spatial light modulation device having a light modulation layer provided between the first light source and a first light source sequentially arranged from the light source side between the light source and the spatial light modulation device;
A lens array, a second lens array, and a condenser lens, wherein the three primary color lights are incident on the spatial light modulator at a predetermined incident angle; A blue band cut filter disposed over a corresponding lens segment of the first lens array for generating a light ray having an incident angle of the color light component larger than the predetermined angle, or a color light component of the three primary color lights An illumination device comprising: a yellow band cut filter disposed over a corresponding lens segment of the second lens array that generates a light beam having an incident angle smaller than the predetermined angle. 4. A light source, a hologram color filter that diffracts three primary color lights and emits the light in predetermined directions, a pixel electrode of a corresponding color disposed in the emission direction, and the hologram color filter and the pixel electrode. A spatial light modulation device having a light modulation layer provided between the first light source and a first light source sequentially arranged from the light source side between the light source and the spatial light modulation device;
A lens array, a second lens array, and a condenser lens, wherein the three primary color lights are incident on the spatial light modulator at the predetermined incident angle, wherein the predetermined incident angle The first to produce a larger ray than
A blue band cut filter disposed over a corresponding lens segment of the lens array and a yellow band disposed over a corresponding lens segment of the second lens array that produces light rays smaller than the predetermined angle of incidence. An illumination device comprising a cut filter.