JP6928780B2 - Projection type image display device - Google Patents

Description

The present disclosure relates to a projection type image display device using a light source device including a light source that emits blue excitation light and a light emitting body that emits light in response to the excitation light.

Patent Document 1 provides a blue laser light emitter as an excitation light source, diffuses the emitted light from the excitation light source by a diffuser plate, and uses the diffused light as a light source light in the blue wavelength band. A projector capable of projecting a high-quality color image by providing a light source device having a wide wavelength distribution in the light source light is disclosed.

Japanese Unexamined Patent Publication No. 2011-128521

The present disclosure provides a projection type image display device capable of optimizing the chromaticity of blue light.

The projection type image display device of the present disclosure includes a solid-state light source that emits blue light having a first wavelength band, a transmitting portion that transmits blue light, and a first light emitter that emits emitted light by irradiating blue light. A second wavelength band that emits emitted light in a second wavelength band that is on the longer wavelength side than the first wavelength band and is adjacent to the first wavelength band by irradiating the wheel and the blue light that has passed through the transmission portion. A light-emitting body, blue light, a light homogenizing element that homogenizes the light emitted from the first light-emitting body and the second light-emitting body, and a light-modulating element that modulates the light homogenized by the light-uniformizing element. , A projection unit that projects light modulated by an optical modulation element.

According to the present disclosure, the chromaticity of blue light displayed on a projection type image display device can be improved.

The figure which shows the projection type image display device in Embodiment 1. The figure which shows the phosphor wheel in Embodiment 1. The figure which shows the fluorescent plate in Embodiment 1. The figure which shows the color wheel in Embodiment 1. Spectral diagram of yellow component light in the projection type image display device of the first embodiment Spectral diagram of green component light in the projection type image display device of the first embodiment Spectral diagram of blue component light in the projection type image display device of the first embodiment The figure which shows the chromaticity diagram for demonstrating the effect of Embodiment 1. The figure which shows the projection type image display device in Embodiment 2. The figure which shows the color wheel in Embodiment 2.

Hereinafter, embodiments will be described in detail with reference to the drawings as appropriate. However, more detailed explanation than necessary may be omitted. For example, detailed explanations of already well-known matters and duplicate explanations for substantially the same configuration may be omitted. This is to avoid unnecessary redundancy of the following description and to facilitate the understanding of those skilled in the art.

It should be noted that the accompanying drawings and the following description are provided for those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the claims.

[Embodiment 1]
(Projection type video display device)
Hereinafter, the configuration of the projection type image display device according to the first embodiment will be described with reference to FIGS. 1 to 6. FIG. 1 is a diagram showing an optical configuration of the projection type image display device 100 according to the first embodiment. In the first embodiment, when red component light R, green component light G, blue component light B (first blue component light B ₁ + second blue component light B ₂ ), and yellow component light Y are used as the image light. Illustrate.

As shown in FIG. 1, first, the projection type image display device 100 includes a light source unit 10, a dichroic mirror 20, a phosphor wheel 30, a fluorescent plate 40, a color wheel 50, a rod integrator 60, and a DMD. It has a (Digital Mirror Device) 70 and a projection unit 80.

The light source unit 10 is composed of, for example, a plurality of solid-state light sources such as a laser diode (LD: Laser Diode) and a light emitting diode (LED: Light Emitting Diode). In this embodiment, a laser diode, particularly a laser diode 11 that emits blue light, is used as a solid-state light source.

The light emitted from the light source unit 10 is blue light having a wavelength of 455 nm, and is used as image light (first blue component light B ₁ ) and also as excitation light for exciting a phosphor. However, the wavelength of the light emitted from the light source unit 10 is not limited to 455 nm, and may be, for example, a wavelength of 440 to 460 nm. The wavelength of this blue light is an example of the first wavelength band.

The blue light emitted from the light source unit 10 passes through the lens 111, the lens 112, and the diffuser plate 141 and is incident on the dichroic mirror 20. The dichroic mirror 20 reflects the first blue component light B ₁ (excitation light). The first blue component light B ₁ reflected by the dichroic mirror 20 is focused by the lenses 113 and 114 to excite the phosphor of the phosphor wheel 30 to emit light.

The dichroic mirror 20 is transmitted through the light-emitting light Y and green emission light G ₁ yellow emitted in the phosphor wheel 30.

As shown in FIG. 2, the phosphor wheel 30 comprises a substrate 31, a reflective film 32 formed on the substrate 31, a phosphor film 33 formed by coating on the reflective film 32 in an annular shape, and the substrate 31. It is composed of a motor 35 for rotating. FIG. 2A is a view of the phosphor wheel viewed in the −x direction of FIG. 1, and FIG. 2B is a view of the phosphor wheel viewed in the z direction of FIG.

The substrate 31 has an opening 31B and transmits excitation light. The phosphor film 33 is composed of a yellow fluorescent film 33Y and a green fluorescent film 33G. In (a) of FIG. 2 and (a) of FIG. 3, the parenthesized reference numerals mean that the components of the reference numerals without parentheses are located on the upper layer side thereof. That is, in FIG. 2A, the reflective film 32 is arranged on the substrate 31, and the yellow fluorescent film 33Y and the green fluorescent film 33G are located on the reflective film 32. The phosphor film 33 is an example of the first light emitter, and the phosphor wheel 30 is an example of a wheel.

The phosphor film 33 can be produced, for example, by mixing ceramic phosphor powder with an adhesive (silicone resin), applying it to a substrate, and curing it at a high temperature. Examples of the ceramic phosphor used for the phosphor film 33 include a YAG phosphor and a LAG phosphor, which are active garnet-structured phosphors with cerium.

As shown in FIG. 2A, the phosphor wheel 30 is composed of four segments in the circumferential direction. The first segment (angle region θ _R ) is a region for generating the red component light R. The second segment (angle region θ _G ) is a region for generating the green component light G. The third segment (angle region θ _B ) is a region for generating the blue component light B. The fourth segment (angle region θ _Y ) is a region for generating the yellow component light Y.

The yellow phosphor film 33Y has a phosphor Y that emits yellow emission light Y in response to _{the first blue component light B 1} (excitation light) emitted from the light source unit 10. The yellow phosphor film 33Y is formed in a fourth segment and a first segment (predetermined angle region θ _Y + θ _R) in the annular region in which the phosphor film 33 is formed. _{The yellow phosphor film 33Y is a region to which the first blue component light B 1} (excitation light) is irradiated while the phosphor wheel 30 is rotating. In other words, on the yellow phosphor film 33Y, first blue component light _{B 1} by the lens 114 is focused.

Green phosphor layer 33G has a phosphor G ₁ for emitting green light beam G ₁ according to the first blue component light B _{1 (excitation} light) emitted from the light source unit 10. Green phosphor layer 33G, of the annular region where the phosphor film 33 is formed, is formed in the second segment (predetermined angular region theta _{G). The green phosphor film 33G is a region to which the first blue component light B 1} (excitation light) is irradiated while the phosphor wheel 30 is rotating. In other words, the first blue component light B ₁ is focused by the lens 114 on the green phosphor film 33G.

Opening 31B is a substrate aperture region passes through the first blue component light B _1. The opening 31B is formed in a predetermined angular region theta _B. The opening 31B is an example of a transmissive portion.

Thus, with the rotation of the phosphor wheel 30 and is emitted in a time division yellow emitted light Y, green light beam G ₁ and the first blue component light B ₁ is. However, it should be noted that the yellow emission light Y and the green emission light G ₁ are reflected and the first blue component light B _{1 is transmitted.}

Returning to FIG. 1, the first blue component light B ₁ transmitted through the aperture 31B of the phosphor wheel 30 is parallelized by the lens 115 and the lens 116, reflected by the mirror 121 and the mirror 122, and collected by the lens 117 and the lens 118. It is illuminated and incident on the fluorescent screen 40. Here, the mirror 122 is a dichroic mirror that reflects only _{the first blue component light B 1} and the second blue component light B _{2 described later.}

As shown in the plan view of FIG. 3A and the side view of FIG. 3B, the fluorescent plate 40 is composed of a light transmissive substrate 41, a dichroic film 42, and a phosphor film 43. The light transmissive substrate 41 can be made of, for example, glass or sapphire. The dichroic film 42 has a spectral characteristic of transmitting blue light (430 to 470 nm) and reflecting light in the wavelength band of 471 to 680 nm.

Phosphor film 43 is composed of a phosphor _{G 2} which emits emission light _{G 2} in the green wavelength band (460nm~750nm). _{Here, the phosphor G 2} used for the phosphor film 43 is the same _{as the phosphor G 1} used for the green phosphor film 33G of the phosphor wheel 30. However, different phosphors can also be used in order to efficiently extract light in the wavelength band of 471 to 680 nm. Further, the film thickness and the phosphor concentration of the phosphor film 43 are adjusted so that only a part of the incident blue light is absorbed to emit emitted light and the rest is transmitted. More specifically, the phosphor film 43 is adjusted so as to absorb 10 to 60% of the incident blue light and transmit the remaining blue light. The phosphor film 43 is an example of a second light emitter, and the wavelength band of the emitted light of the phosphor film 43 is 460 nm to 750 nm, which is an example of a second wavelength band.

Emission light emitted from the phosphor film 43, the dichroic film 42, and the first blue incidence direction of the light component B ₁ is emitted in the opposite direction. Further, the first blue component light B _{1 that} is not absorbed by the phosphor film 43 passes through the dichroic film 42.

Returning to FIG. 1, the luminescent light-emitting light Y and green emission light G ₁ yellow is (in FIG. 1 indicated by a dotted line) from the phosphor wheel 30 is transmitted through the dichroic mirror 20, transmitted through the lens 131 The light is reflected by the mirror 124 to change the 90 ° optical path, passes through the lens 132, and is incident on the color wheel 50.

On the other hand, the first blue component light B ₁ (shown by the solid line in FIG. 1) transmitted through the phosphor wheel 30 is incident on the fluorescent plate 40. As described above, since the first blue component light B ₁ is absorbed or transmitted by the fluorescent plate 40, the green emitted light G ₂ emitted from the fluorescent plate 40 is seconded by the mirror 122 (dichroic mirror). Only the blue component light B ₂ is reflected. Here, the wavelength band of 460 nm to 560 nm of the second blue component light B ₂ having a main wavelength of 515 nm is an example of the third wavelength band. The second blue component light B ₂ passes through the opening 31B of the phosphor wheel 30 and passes through the dichroic mirror 20. The second blue component light B ₂ travels in the optical path indicated by the alternate long and short dash line in FIG.

On the other hand, the first blue component light B ₁ (indicated by the solid line in the figure) transmitted through the fluorescent screen 40 passes through the lens 119 and is reflected by the mirror 123 and the dichroic mirror 20. At this time, the first blue component light B ₁ transmitted through the fluorescent screen 40 and the second blue component light B ₂ extracted from the emitted light G _{2 of the} fluorescent plate 40 are combined by the dichroic mirror 20 and transmitted through the lens 131. It is reflected by the mirror 124, passes through the lens 132, and enters the color wheel 50. That is, as the phosphor wheel 30 rotates, it constitutes a yellow emission light Y including a red component light R and a yellow component light Y, a green emission light G ₁ including a green component light G, and a blue component light B. The first blue component light B ₁ and the second blue component light B ₂ are emitted in a time-divided manner.

In this way, the chromaticity of the blue component light B as the image light _{becomes the chromaticity obtained by combining the first blue component light B 1} and the second blue component light B _2, and the second blue component light B 2 is converted into the second blue component light B ₂ . _{By mixing the color with the first blue component light B 1} having a main wavelength of 455 nm, the optimum blue tint is adjusted.

In the present embodiment, the main wavelength of the second blue component light B ₂ is 515 nm, but the present invention is not limited to this. _{It is desirable to select the phosphor G 2} and design the spectral characteristics of the mirror 122 (dichroic mirror) so that the main wavelength of the second blue component light B ₂ is within the range of 470 to 530 nm.

Here, the positional relationship between the phosphor wheel 30 and the fluorescent plate 40 is substantially conjugated. Therefore, the light source image in the first of the blue component light B _1, the position of the phosphor wheel 30 emitted from the phosphor wheel 30 is transferred onto the fluorescent screen 40. Further, the light source image of the green emitted light G ₂ from the fluorescent plate 40 at the position of the fluorescent plate 40 is transferred onto the phosphor wheel 30.

As shown in FIG. 4, the color wheel 50 includes a transparent substrate 51, a dielectric multilayer film 52 formed on the substrate 51, and a motor 53 for rotating the substrate 51. FIG. 4A is a view of the color wheel viewed in the z direction of FIG. 1, and FIG. 4B is a view of the color wheel viewed in the −y direction of FIG.

The dielectric multilayer film 52 includes a red transmissive dichroic film 52R formed in _{a predetermined angle region θ R} (first segment) and a green transmissive dichroic film formed in _{a predetermined angle region θ G (second segment).} It is composed of 52G and an antireflection film 52C formed in a predetermined angle region θ _B (third segment) and a predetermined angle region θ _{Y (fourth segment).}

The color wheel 50 is controlled so that its rotation is synchronized with the phosphor wheel 30. That is, at the timing when the light is incident on the angle region θ _R of the phosphor wheel 30, the light is incident on the angle region θ _R of the color wheel 50. At the timing when the light is incident on the angle region θ _G of the phosphor wheel 30, the light is incident on the angle region θ _G of the color wheel 50. At the timing when the light is incident on the angle region θ _B of the phosphor wheel 30, the light is incident on the angle region θ _B of the color wheel 50. At the timing when the light is incident on the angle region θ _Y of the phosphor wheel 30, the light is incident on the angle region θ _Y of the color wheel 50.

In this way, the light generated by the phosphor wheel 30 and the color wheel 50 in the angle regions θ _R , θ _G , θ _B , and θ _Y is emitted in a time-division manner. That is, each color component light including the red component light R, the green component light G, the blue component light B, and the yellow component light Y is generated by the phosphor wheel 30 and the color wheel 50 and emitted in a time-divided manner.

The color generation in each angle region (segment) will be described below with reference to the spectra shown in FIGS. 5A to 5C.

In the angle region θ _R , yellow emission light Y (solid line in FIG. 5A) is emitted from the yellow phosphor film 33Y of the phosphor wheel 30, and is transmitted through the red transmissive dichroic film 52R of the color wheel 50 to form a red component. Light R (broken line in FIG. 5A). By adjusting the spectral characteristics of the red transmission dichroic film 52R of the color wheel 50, the color purity of the red component light R can be adjusted.

In the angle region θ _{G , green emitted light G 1} (solid line in FIG. 5B) is emitted from the green phosphor film 33 G of the phosphor wheel 30, and is transmitted through the green transmissive dichroic film 52 G of the color wheel 50 to be green. It becomes the component light G (broken line in FIG. 5B). By adjusting the spectral characteristics of the green transmissive dichroic film 52G of the color wheel 50, the color purity of the green component light G can be adjusted.

In the angle region θ _B , the first blue component light B ₁ transmitted through the opening 31 B of the phosphor wheel 30 is incident on the fluorescent plate 40. _{The first blue component light B 1} (one-dot chain line in FIG. 5C) that has passed through the fluorescent plate 40 passes through the antireflection film 52C of the color wheel 50. On the other hand, the emitted light G ₂ (solid line in FIG. 5C) _{emitted from the fluorescent screen 40 becomes the second blue component light B 2} (broken line in FIG. 5C) through the mirror 122, passes through the opening 31B again, and the color wheel 50. It passes through the antireflection film 52C of. The color change caused by the first blue component light B ₁ and the second blue component light B ₂ passing through the antireflection film 52C of the color wheel 50 is at a negligible level. In FIG. 5C, the _{scale of the first blue component light B 1} is 1/100.

In the angular region θ _Y , yellow emission light Y is emitted from the yellow phosphor film 33Y of the phosphor wheel 30, and passes through the antireflection film 52C of the color wheel 50 to become yellow component light Y. The change in color due to the yellow emitted light Y passing through the antireflection film 52C of the color wheel 50 is at a negligible level.

Returning to FIG. 1, the light emitted from the color wheel 50 is incident on the rod integrator 60. The rod integrator 60 is a solid rod made of a transparent member such as glass. The rod integrator 60 equalizes the light emitted from the light source unit 10 and the light emitted from the phosphor wheel 30. The rod integrator 60 may be a hollow rod whose inner wall is formed of a mirror surface. The rod integrator 60 is an example of a light homogenizing element.

The light emitted from the rod integrator 60 passes through the lens 151, the lens 152, and the lens 153, is incident on the total reflection prism composed of the triangular prism 161 and the triangular prism 162, and then is incident on the DMD 70.

The DMD 70 modulates each color component light generated by the light source unit 10, the phosphor wheel 30, and the color wheel 50 in a time division manner. Specifically, the DMD 70 is composed of a plurality of micromirrors, and the plurality of micromirrors are movable. Each micromirror basically corresponds to one pixel. The DMD 70 switches whether or not to reflect light to the projection unit 80 side by a modulation operation that changes the angle of each minute mirror according to the video signal.

The DMD 70 expresses the gradation of each color corresponding to _{the angle regions θ R} , θ _G , θ _B , and θ _Y described with reference to FIGS. 2 and 4. That is, the red component light R (image light) is modulated during the time when the angle region θ _{R is irradiated with light.} During the time when the angle region θ _G is irradiated with light, the green component light G (image light) is modulated. During the time when the angle region θ _B is irradiated with light, the blue component light B (image light) is modulated. During the time when the angle region θ _Y is irradiated with light, the yellow component light Y (image light) is modulated. The DMD 70 is an example of a light modulation element.

The video light modulated by the DMD 70 passes through the triangular prisms 161 and 162 and is incident on the projection unit 80. The image light incident on the projection unit 80 is magnified and projected on a screen (not shown).

FIG. 6 shows a chromaticity diagram, and as shown in this chromaticity diagram, the color gamut A of the projection type image display device 100 of the present embodiment includes sRGB (only each color point is shown in FIG. 6). You can see that it is doing. The chromaticity of the second blue component light B ₂ is a point indicated by a triangle in FIG. 6, and the blue chromaticity is optimized by mixing the color with _{the first blue component light B 1.}

On the other hand, it can be seen that the color gamut B in the case where only the first blue component light B _{1 is used as the image light without using the fluorescent plate 40 has a region that does not include sRGB.}

(Action and effect)
In the first embodiment, by using a fluorescent plate 40, a first blue component light B ₁ it can be mixed a second blue component light B _2, include sRGB that could not be included in the first blue component light B ₁ The color gamut to be achieved becomes feasible.

[Embodiment 2]
Hereinafter, the second embodiment will be described with reference to FIGS. 7 and 8. In the following, the differences from the first embodiment will be mainly described.

FIG. 7 is a diagram showing a projection type image display device 101 according to the second embodiment. FIG. 8 is a color wheel 57 used in the second embodiment, which is used in place of the color wheel 50 (FIG. 4) of the projection type image display device 100 (FIG. 1) described in the first embodiment. It is a thing. In the color wheel 57, the dielectric multilayer film 52 has a red transmissive dichroic film 52R formed in _{a predetermined angle region θ R} , a green transmissive dichroic film 52G formed in _{a predetermined angle region θ G, and a predetermined angle region.} composed of the anti-reflection film 52C formed in the cyan transmission dichroic film 52Cy a predetermined angular region theta _Y formed in theta _B. In other words, in that the cyan transmission dichroic film 52Cy is formed in the angular region theta _B, differs from the first embodiment.

Further, in the first embodiment, the mirror 122 shown in FIG. 1 has been described as a dichroic mirror, but in the second embodiment, a total reflection mirror is used as the mirror 122 shown in FIG. In this case, the spectral change (chromaticity change) due to the reflection of the mirror 122 (total reflection mirror) is at a negligible level.

_{In the first embodiment, the second blue component light B 2} is extracted from the green light emitting light G ₂ emitted from the fluorescent screen 40 by the mirror 122 (dichroic mirror), but in the second embodiment, the second blue component light B 2 in the color wheel 50 is extracted. _{The second blue component light B 2} is extracted by the cyan-transmitted dichroic film 52Cy provided in the segment 3. That is, as shown in FIG. 7, the green light emitting light G ₂ emitted from the fluorescent plate 40 is reflected by the mirror 122 (total reflection mirror) and the mirror 121, and is transmitted through the opening 31B of the phosphor wheel 30 and the dichroic mirror 20. , Reflected by the mirror 124 and incident on _{the angle region θ B of the color wheel 57.} Green light beam G ₂ incident on the color wheel 57, second blue component light B ₂ is extracted by the cyan transmission dichroic film 52Cy, green second blue component light B only ₂ color wheel of emitted light G ₂ It passes through 57. The cyan-transmitted dichroic film 52Cy _{extracts the second blue component light B 2} and transmits the first blue component light B _1.

_{The second blue component light B 2} emitted from the color wheel 57 constitutes the blue component light B together with the first blue component light B ₁ , and is incident on the rod integrator 60 to be homogenized.

[Other embodiments]
As described above, Embodiments 1 and 2 have been described as examples of the techniques disclosed in the present application. However, the technique in the present disclosure is not limited to this, and can be applied to embodiments in which changes, replacements, additions, omissions, etc. have been made. It is also possible to combine the components described in the first and second embodiments to form a new embodiment. Therefore, other embodiments will be illustrated below.

In the first and second embodiments, the DMD 70 is exemplified as the light modulation element, but the embodiment is not limited to this. The light modulation element may be one liquid crystal panel or three liquid crystal panels (red liquid crystal panel, green liquid crystal panel and blue liquid crystal panel). The liquid crystal panel may be a transmissive type or a reflective type.

In the first and second embodiments, the phosphor wheel is exemplified as the phosphor that generates the emitted light, but the embodiment is not limited to this. The phosphor may be a static inorganic phosphor ceramic.

Since the above-described embodiment is for exemplifying the technique in the present disclosure, various changes, replacements, additions, omissions, etc. can be made within the scope of claims or the equivalent scope thereof.

The present disclosure can be applied to a projection type image display device such as a projector.

10 Light source unit 20 Dichroic mirror 30 Dichroic wheel 31 Substrate 31B Opening 32 Reflective film 33 Fluorescent film 33Y Yellow phosphor film 33G Green phosphor film 35, 53 Motor 40 Fluorescent plate 41 Light transmitting substrate 42 Dichroic film 43 Fluorescent film 50 , 57 Color wheel 51 Substrate 52 Dielectric multilayer film 52R Red transmissive dichroic film 52G Green transmissive dichroic film 52C Anti-reflection film 52C Cyan transmissive dichroic film 60 Rod integrator 70 DMD
80 Projection unit 100, 101 Projection type image display device 111, 112, 113, 114, 115, 116, 117, 118, 119 Lens 121, 122, 123, 124 Mirror 131, 132 Lens 141 Diffusing plate 151, 152, 153 Lens 161 and 162 Triangular prism B ₁ 1st blue component light B ₂ 2nd blue component light

Claims (7)

A solid-state light source that emits blue light having a first wavelength band,
A wheel having a transmitting portion that transmits blue light and a first light emitting body that emits emitted light by irradiating the blue light.
By irradiating the blue light transmitted through the transmission portion, a second emission light emitted from a second wavelength band located on the longer wavelength side than the first wavelength band and adjacent to the first wavelength band is emitted. A fluorescent plate with a body and
The blue light, a light homogenizing element that homogenizes the emitted light from the first light emitting body and the second light emitting body, and the like.
An optical modulation element that modulates the light homogenized by the optical homogenization element, and
E Bei and a projection unit that projects the light modulated by the light modulation device,
A projection type image display device in which the positional relationship between the wheel and the fluorescent plate is substantially conjugated. The projection type image display device according to claim 1, wherein the second light emitter absorbs 10 to 60% of the blue light. The emitted light in the second wavelength band includes light in a third wavelength band adjacent to the first wavelength band.
1. A dichroic mirror comprising a dichroic mirror that extracts light in the third wavelength band included in the light emitted from the second light emitter in the optical path between the first light emitting body and the second light emitting body. The projection type image display device described in 1. Further provided with a color wheel in which the blue light and the light emitted from the first light emitting body and the second light emitting body are incident.
The emitted light in the second wavelength band includes light in a third wavelength band adjacent to the first wavelength band.
The projection type according to claim 1, wherein a predetermined segment of the color wheel into which the blue light and the light emitted from the second light emitter are incident transmits the blue light and light in the third wavelength band. Video display device. Further provided with a color wheel in which the blue light and the light emitted from the first light emitting body and the second light emitting body are incident.
The emitted light in the second wavelength band includes light in a third wavelength band adjacent to the first wavelength band.
The projection type image display device according to claim 1, wherein the color wheel includes a dichroic film that extracts light in the third wavelength band included in the light emitted from the second light emitter. The projection type image display device according to any one of claims 3 to 5, wherein the light in the third wavelength band has a main wavelength in the range of 470 nm to 530 nm. The wheel emits each color component light including at least red component light, green component light, and blue component light in a time-divided manner, and the blue component light is light in the first wavelength band and the third wavelength band. The projection type image display device according to any one of claims 3 to 5, which comprises the light of.

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