JP2018146691A - Projection-type image display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a projection-type image display device capable of improving color chromaticity of blue light.SOLUTION: The projection-type image display device 100 includes: a light source unit 10 constituted of a laser diode for emitting blue light; a dichroic mirror 20; a phosphor wheel 30; a fluorescent plate 40; a motor 210 for driving the fluorescent plate 40; a controller for driving the motor; a color wheel 50; a rod integrator 60; a DMD (Digital Mirror Device) 70; and a projection unit 80. A beam of blue light emitted from the light source unit 10 transmits an opening 31B in the phosphor wheel 30 and is incident on a fluorescent body film 32 formed over the fluorescent plate 40. The controller controls the motor to adjust the position between the fluorescent body film 32 and the optical path of the blue light.SELECTED DRAWING: Figure 1

Description

  The present disclosure relates to a projection display apparatus using a light source device including a light source that emits blue excitation light and a light emitter that emits light according to the excitation light.

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

JP 2011-128521 A

  The present disclosure provides a projection display apparatus capable of optimizing the chromaticity of blue light.

  A projection display apparatus according to the present disclosure includes a solid-state light source that emits blue light having a first wavelength band, a transmissive portion that transmits blue light, and a first light emitter that emits emitted light when irradiated with blue light. A second wheel that emits emitted light in a second wavelength band that is longer than the first wavelength band and adjacent to the first wavelength band by irradiation with blue light that has passed through the transmission portion and the rotating wheel A light-emitting plate provided with a light-emitting plate, a light-emitting plate driving unit for driving the light-emitting plate to adjust the position of the optical path of the blue light with the second light-emitting body, a controller for controlling the light-emitting plate driving unit, and blue light A light uniformizing element that uniformizes the light emitted from the first light emitter and the second light emitter, a light modulating element that modulates the light uniformized by the light uniformizing element, and modulation by the light modulating element And a projection unit for projecting the emitted light.

  According to the present disclosure, it is possible to improve the chromaticity of blue light displayed on the projection display apparatus.

FIG. 5 shows a projection display apparatus according to Embodiment 1; The figure which shows the fluorescent substance wheel in Embodiment 1. The figure which shows the fluorescent screen in Embodiment 1. The figure which shows the color wheel in Embodiment 1. Spectrum diagram in the projection display apparatus of the first embodiment The figure which shows the chromaticity diagram for demonstrating the effect of Embodiment 1. FIG. The figure which shows the color wheel in Embodiment 2. The figure which shows the fluorescent screen in Embodiment 3. The figure which shows the fluorescent screen in Embodiment 4.

  Hereinafter, embodiments will be described in detail with reference to the drawings as appropriate. However, more detailed description than necessary may be omitted. For example, detailed descriptions of already well-known matters and repeated descriptions for substantially the same configuration may be omitted. This is to avoid the following description from becoming unnecessarily redundant and to facilitate understanding by those skilled in the art.

  The accompanying drawings and the following description are provided to enable 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 image display device)
The configuration of the projection display apparatus according to Embodiment 1 will be described below with reference to FIGS. FIG. 1 is a diagram showing an optical configuration of a projection display apparatus 100 according to the first embodiment. In the first embodiment, red component light R, green component light G ₁ , blue component light B (first blue component light B ₁ + second blue component light B ₂ ), and yellow component light Y are used as video light. The case is illustrated. The first blue component light is an example of blue light.

  As shown in FIG. 1, first, the projection display apparatus 100 includes a light source unit 10, a dichroic mirror 20, a phosphor wheel 30, a phosphor plate 40, a color wheel 50, a rod integrator 60, a DMD. (Digital Mirror Device) 70, a projection unit 80, a motor 210 that drives the fluorescent screen 40, and a controller 220 that outputs a control signal for controlling the motor 210 in response to a user input from an input device such as a remote controller (not shown). . The phosphor wheel is an example of a rotating wheel.

  The light source unit 10 includes a plurality of solid light sources such as a laser diode (LD) and a light emitting diode (LED). In the present embodiment, a laser diode, in particular, 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 (first blue component light B ₁ ), and this blue light is also used as excitation light for exciting the phosphor. However, the wavelength of the emitted light 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 455 nm of blue light is an example of the first wavelength band.

  Blue light emitted from the light source unit 10 passes through the lens 111, the lens 112, and the diffusion plate 141 and enters 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 condensed by the lenses 113 and 114 to excite the phosphor of the phosphor wheel 30 to emit light. The dichroic mirror 20 transmits the yellow component light Y and the green component light G ₁ emitted from the phosphor wheel 30.

  As shown in FIG. 2, the phosphor wheel 30 includes a substrate 31, a reflection film 34 formed on the substrate 31, a phosphor film 32 formed in an annular shape on the reflection film 34, and the substrate 31. The motor 33 is configured to rotate. 2A is a view of the phosphor wheel as viewed in the −x direction of FIG. 1, and FIG. 2B is a view of the phosphor wheel as viewed in the z direction of FIG. 1. The substrate 31 has an opening 31B and transmits excitation light. The phosphor film 32 is composed of a yellow phosphor film 32Y and a green phosphor film 32G. 2 (a) and 4 (a), the reference numerals with parentheses mean that the constituent elements with reference numerals without parentheses are located on the upper layer side. That is, FIG. 2A shows that the reflective film 34 is disposed on the substrate 31, and the yellow phosphor film 32Y and the green phosphor film 32G are located on the reflective film 34.

  The phosphor film 32 can be produced, for example, by mixing phosphor powder in a silicone resin, applying it to a substrate, and curing it at a high temperature. The phosphor used for the phosphor film 32 is, for example, a YAG phosphor or a LAG phosphor that is a cerium-activated garnet structure phosphor. The phosphor film 32 is an example of a first light emitter, and the phosphor wheel 30 is an example of a wheel.

The yellow phosphor film 32 </ b> Y has a phosphor Y that emits yellow component 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 32Y is formed in a predetermined angular region θ _Y + θ _R in the annular region where the phosphor film 32 is formed. The yellow phosphor film 32 </ b> Y is a region irradiated with the first blue component light B ₁ (excitation light) while the phosphor wheel 30 is rotating. In other words, on the yellow phosphor film 32Y, first blue component light _{B 1} by the lens 114 is focused.

Green phosphor layer 32G has a phosphor G ₁ which emits green component light G ₁ in response to a first blue component light B _{1 (excitation} light) emitted from the light source unit 10. Green phosphor layer 32G, of the annular region where the phosphor film 32 is formed, is formed in a predetermined angular region theta _G. The green phosphor film 32G is a region to be irradiated with the first blue component light B ₁ (excitation light) while the phosphor wheel 30 is rotating. In other words, on the green phosphor film 32G, the first blue component light _{B 1} is being focused by the lens 114.

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 transmission part.

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

The first blue component light B ₁ transmitted through the opening 31B of the phosphor wheel 30 is collimated by the lens 115 and the lens 116, reflected by the mirror 121 and the mirror 122, collected by the lens 117 and the lens 118, and condensed by the fluorescent plate 40. Is incident on. Here, the mirror 122, a first blue component light B _1, a dichroic mirror which reflects only the second blue component light to be described later.

As shown in the plan view of FIG. 3A and the side view of FIG. 3B, the fluorescent plate 40 includes a drop-shaped light-transmitting 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 having a wavelength band of 471 to 680 nm. Phosphor film 43 is composed of a phosphor _{G 2} which emits a 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 32 G of the phosphor wheel 30. However, different phosphors can be used in order to efficiently extract light in the wavelength band of 471 to 680 nm. The phosphor film 43 is adjusted in film thickness and phosphor concentration so as to absorb only a part of the incident blue light, emit emitted light, and transmit the rest. 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 fluorescent plate 40 is an example of a light emitter. The wavelength band 460 nm to 750 nm of the emitted light of the phosphor film 43 is an example of the second wavelength band.

A rotating shaft 210 </ b> A of a motor 210 is attached to one end side of the fluorescent plate 40. The motor 210 is an example of a light emitting plate driving unit. Motor 210 is controlled by signals from the controller 220 drives the fluorescent plate 40 as rotated by a predetermined angle, to adjust the position of the optical path of the fluorescent film 43 and the first blue component light B _1. Specifically, the fluorescent plate 40 is irradiated with a first position where the first blue component light B ₁ is irradiated to the phosphor film 43 of the fluorescent plate 40, the phosphor film 43 of the first blue component light B ₁ is a fluorescent screen 40 Is moved to the second position (indicated by a broken line in FIG. 3).

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. The first blue component light B _{1 that} has not been absorbed by the phosphor film 43 passes through the dichroic film 42.

Returning to FIG. 1, emitted light Y and emitted light G ₁ that are emitted light from the phosphor wheel 30 (shown by dotted lines in the figure) are transmitted through the dichroic mirror 20, transmitted through the lens 131, and reflected by the mirror 124. The 90 ° optical path is changed, and the light passes through the lens 132 and enters the color wheel 50. On the other hand, the first blue component light B ₁ (shown by a solid line in the figure) that has passed through the phosphor wheel 30 is incident on the phosphor plate 40. As described above, the first blue component light B ₁ represents either be absorbed by the fluorescent screen 40, or because the transmitted, emitted light G ₂ from the fluorescent plate 40, when reflected by a mirror 122 (dichroic mirror), the Only the 2 blue component light B ₂ is reflected. Here, the wavelength band 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, passes through the dichroic mirror 20. Emitting light G ₁ and Y, in the second blue component light B ₂ both in FIG. 1, it travels in the optical path indicated by a chain line. On the other hand, the first blue component light B ₁ (shown by the solid line in the figure) that has passed through the fluorescent plate 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 plate 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. The light is reflected by the mirror 124, passes through the lens 132, and enters the color wheel 50. That is, the phosphor wheel 30 includes yellow component light (emission light Y) including red component light, green component light (emission light G ₁ ), and blue component light (first blue component light B ₁ and The second blue component light B ₂ ) is emitted in a time division manner.

In this way, the chromaticity of the blue component light B as image light, the first blue component light B ₁ and the second blue component light B ₂ is a synthetic chromaticity, a second blue component light B _2, By mixing the first blue component light B ₁ having the main wavelength of 455 nm, the optimum blue chromaticity is adjusted.

In this embodiment, the dominant wavelength of the second blue component light B ₂ is 515 nm, but is not limited thereto. It is desirable to select the phosphor G ₂ and design the spectral characteristics of the mirror 122 so that the dominant wavelength of the second blue component light B ₂ is in the range of 470 to 530 nm.

Here, the positional relationship between the phosphor wheel 30 and the phosphor plate 40 is substantially conjugated. Therefore, the light source image of the first blue component light B ₁ emitted from the phosphor wheel 30 at the position of the phosphor wheel 30 is transferred onto the phosphor plate 40. The light source image of the 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 substrate 51, a dielectric multilayer film 52 formed on the substrate 51, and a motor 53 for rotating the substrate 51. 4A is a view of the color wheel as viewed in the z direction of FIG. 1, and FIG. 4B is a view of the color wheel as viewed in the y direction of FIG. The dielectric multilayer film 52 has a red transmission dichroic film 52R formed in a predetermined angular region theta _R, green transmissive dichroic film 52G formed in a predetermined angular region theta _G, it is formed in a predetermined angular region theta _B was composed of AR (Anti Reflection) film 52C ₁ and AR film 52C ₂ formed in a predetermined angular region theta _Y.

The color wheel 50 is controlled to synchronize with the phosphor wheel 30 in rotation. In other words, at the timing when light is incident on the angular region theta _R phosphor wheel 30, light is incident on the angular region theta _R of the color wheel 50. At the timing at which light is incident on the angular region theta _G phosphor wheel 30, light is incident on the angular region theta _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 at which light is incident on the angular region theta _Y of the phosphor wheel 30, light is incident on the angular region theta _Y of the color wheel 50.

As described above, the light generated by the phosphor wheel 30 and the color wheel 50 is emitted in a time division manner in the light generated in the angle regions θ _R , θ _G , θ _B , and θ _Y. That is, the phosphor wheel 30 and the color wheel 50 generate each color component light including red component light, green component light, blue component light, and yellow component light and emit them in a time division manner.

  Hereinafter, color generation in each angle region (segment) will be described with reference to the spectrum shown in FIG.

In angular region theta _R, emitted light Y (FIG. 5 (a)) is emitted from the yellow phosphor film 32Y of the phosphor wheel 30, by passing through the red transmission dichroic film 52R of the color wheel 50, the red component light R (FIG. 5A). By adjusting the spectral characteristics of the red transmitting dichroic film 52R of the color wheel 50, the color purity of the red component light R can be adjusted.

In angular region theta _G, emitting light G _{1 (FIG.} 5 (b)) is emitted from the green phosphor layer 32G of the phosphor wheel 30, by passing through the green transmissive dichroic film 52G of the color wheel 50, green component It becomes the light G ₁ (FIG. 5B). By adjusting the spectral characteristics of the green transmissive dichroic film 52G of the color wheel 50, it is possible to adjust the color purity of the green component light G _1.

In the angle region θ _B , the first blue component light B ₁ transmitted through the opening 31B of the phosphor wheel 30 enters the fluorescent plate 40. The first blue component light B ₁ (FIG. 5C) transmitted through the fluorescent plate 40 is transmitted through the AR film 52C ₁ of the color wheel 50. On the other hand, the emitted light G ₂ (FIG. 5C) emitted from the fluorescent plate 40 becomes the second blue component light B ₂ (FIG. 5C) through the mirror 122, and is transmitted again through the opening 31B. It passes through the AR film 52C ₁ of the wheel 50. The change in color due to the transmission of the first blue component light B ₁ and the second blue component light B ₂ through the AR film 52C ₁ of the color wheel 50 is at a negligible level. Incidentally, in FIG. 5 (c), the first blue component light _{B 1} represents is the scale 1/100.

In angular region theta _Y, emitted light Y is emitted from the yellow phosphor film 32Y of the phosphor wheel 30, the yellow component light Y by passing through the AR film 52C ₁ of the color wheel 50. Color change due to the emitted light Y is transmitted through the AR film 52C ₁ of the color wheel 50 is negligible.

  The light emitted from the color wheel 50 enters the rod integrator 60. The rod integrator 60 is a solid rod made of a transparent member such as glass. The rod integrator 60 makes the light emitted from the light source unit 10 and the light emitted from the phosphor wheel 30 uniform. The rod integrator 60 may be a hollow rod whose inner wall is constituted by a mirror surface. The rod integrator 60 is an example of a light uniformizing element.

  The light emitted from the rod integrator 60 passes through the lens 151, the lens 152, and the lens 153, enters the total reflection prism including the triangular prism 161 and the triangular prism 162, and then enters 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 includes a plurality of minute mirrors, and the plurality of minute mirrors are movable. Each micromirror basically corresponds to one pixel. The DMD 70 switches whether to reflect light to the projection unit 80 side by a modulation operation that changes the angle of each micromirror according to the video signal. The DMD 70 is an example of a light modulation element.

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

FIG. 6 shows a chromaticity diagram. As shown in this chromaticity diagram, the color gamut A of the projection display apparatus 100 of the present embodiment includes sRGB (only the respective color points are shown in the figure). You can see that On the other hand, without using a fluorescent plate 40, the color gamut B in the case of using only the first blue component light B ₁ as image light, it can be seen that there is a region that does not include the sRGB.

(Function 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 Color gamut to be realized.

Also, can choose whether or not to place the phosphor layer of the fluorescent plate 40 in the optical path of the first blue component light B _1, setting the blue chromaticity user's preference, it is not set.

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

  FIG. 7 shows a color wheel 50 used in the second embodiment, which is used in the projection display apparatus shown in FIG. 1 in place of the color wheel 50 shown in FIG.

In the second embodiment, in the color wheel 50, the dielectric multilayer film 52 has a predetermined and red transmissive dichroic film 52R formed in angular region theta _R, a predetermined angular region theta green transmissive dichroic film formed at _G 52G When composed of AR film 52C formed in the cyan transmission dichroic film 52Cy a predetermined angular region theta _Y formed in a predetermined angular region theta _B.

  In the first embodiment, the mirror 122 in FIG. 1 has been described as a dichroic mirror. However, in the second embodiment, a total reflection mirror is used as the mirror in FIG. ) Is a negligible level.

As described above, in the first embodiment, the second blue component light B ₂ is extracted from the emitted light G ₂ of the fluorescent plate 40 by the mirror 122 (dichroic mirror). the second blue component light B ₂ is extracted by the cyan transmission dichroic film 52Cy provided One segment. Incidentally, the cyan transmission dichroic film 52Cy is configured to extract the second blue component light _{B 2,} also passes through the first blue component light _{B 1.}

[Embodiment 3]
FIG. 8 shows the configuration of the fluorescent plate 40A used in the third embodiment. Also in this embodiment, it is composed of a light-transmitting substrate 41 having a drop shape, a dichroic film, and a phosphor film 43. The phosphor film 43 includes fan-shaped phosphor parts 43A, 43B, and 43C, which are three light emitting parts having different phosphor mixture concentrations.

  The motor 210 is driven by the control signal from the controller 220 so that the fluorescent plate 40A is positioned to selectively irradiate one of the phosphor portions 43A, 43B, and 43C with the blue light. In this embodiment, the phosphor portion 43A has the highest concentration, the phosphor portion 43C has the lowest concentration, and the phosphor portion 43B has an intermediate concentration between the phosphor portion 43A and the phosphor portion 43C. It is arranged to be. Therefore, the blue chromaticity adjustment obtained by rotating + θ and −θ with A0 as the reference position can be adjusted in three stages.

  Alternatively, the phosphor portions 43A, 43B, and 43C may have the same phosphor concentration in the phosphor film 43 and different film thicknesses. In this case, the phosphors are arranged such that the phosphor part 43A is the thickest, the phosphor part 43C is the thinnest, and the phosphor part 43B has an intermediate thickness between the phosphor part 43A and the phosphor part 43C. By doing so, the blue chromaticity obtained can be adjusted.

[Embodiment 4]
FIG. 9 shows the configuration of the fluorescent plate 40B used in the fourth embodiment. FIG. 9A is a plan view and FIG. 9B is a side view. The fluorescent plate 40B of this embodiment is a disc-shaped wheel, and includes a light-transmitting substrate 41, a dichroic film 42, and a phosphor film 43 as in the first embodiment. The phosphor film 43 includes fan-shaped phosphor parts 43A, 43B, and 43C, which are three light emitting parts having different phosphor mixture concentrations. These phosphor unit 43A, 43B, 43C are formed in the phosphor same angular region and the opening 31B of the wheel 30 theta _B shown in FIG. The controller 220 controls the motor 210 so that the fluorescent plate 40B rotates in synchronization with the phosphor wheel 30 in a predetermined phase relationship.

  That is, the motor 210 is rotationally driven by the control signal from the controller 220 so that the first blue component light is selectively irradiated to any one of the phosphor parts 43A, 43B, and 43C. In this embodiment, the phosphor portion 43A has the highest concentration, the phosphor portion 43C has the lowest concentration, and the phosphor portion 43B has an intermediate concentration between the phosphor portion 43A and the phosphor portion 43C. It is arranged to be. Accordingly, the phase of the motor is adjusted so that the first blue component light from the opening of the phosphor wheel 30 is selected and irradiated on any one of the phosphor part 43A, the phosphor part 43B, and the phosphor part 43C. The wheel is rotated synchronously. In this embodiment, a transmissive portion 43D in which no phosphor is provided is further provided in the circumferential direction in which the phosphor portions are arranged, and the first blue component light from the opening of the phosphor wheel 30 is transmitted through the transmissive portion 43D. When the phase is adjusted so as to pass through, a state where the blue chromaticity is not adjusted can be obtained. Further, if the rotary drive is performed as in the fluorescent plate 40B, an effect of cooling the heat generated by the phosphor is obtained, and the problem of temperature quenching of the phosphor can be avoided.

  Similarly to the third embodiment, the phosphor chromaticity of the phosphor film 43 is the same, and the phosphor portions 43A, 43B, and 43C having different film thicknesses are used to adjust the obtained blue chromaticity. It is also possible.

[Other embodiments]
As described above, Embodiments 1 to 4 have been described as examples of the technology disclosed in the present application. However, the technology in the present disclosure is not limited to this, and can also be applied to embodiments that have been changed, replaced, added, omitted, and the like. Moreover, it is also possible to combine each component demonstrated in the said Embodiment 1-4 and it can also be set as a new embodiment.

  Therefore, other embodiments will be exemplified below.

  In the embodiment, 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 (a red liquid crystal panel, a green liquid crystal panel, and a blue liquid crystal panel). The liquid crystal panel may be transmissive or reflective.

  In the embodiment, the phosphor wheel 30 is exemplified as the phosphor that generates the emitted light, but the embodiment is not limited to this.

  The above-described embodiments are for illustrating the technique in the present disclosure, and various modifications, replacements, additions, omissions, and the like can be made within the scope of the claims and their equivalents.

  The present disclosure can be applied to a projection display apparatus such as a projector.

DESCRIPTION OF SYMBOLS 10 Light source unit 20 Dichroic mirror 30 Phosphor wheel 31 Substrate 31B Aperture 32 Phosphor film 32Y Yellow phosphor film 32G Green phosphor film 33 Motor 40, 40A, 40B Fluorescent plate 41 Light transmissive substrate 42 Dichroic film 43 Phosphor film 50 Color Wheel 51 Substrate 52 Dielectric multilayer film 52R Red transmitting dichroic film 52G Green transmitting dichroic film 52C, 52C _1, 52C ₂ AR film 53 Motor 60 Rod integrator 70 DMD
80 Projection unit 100 Projection display apparatus 111, 112, 113, 114, 115, 116, 117, 118, 119 Lens 121, 123, 124 Mirror 122 Mirror 131, 132 Lens 141 Diffuser plate 151, 152, 153 Lens 161, 162 Triangular prism 210 Motor 220 Controller B ₁ First blue component light B ₂ Second blue component light

Claims (9)

A solid-state light source that emits blue light having a first wavelength band;
A rotating wheel having a transmission part that transmits the blue light and a first light emitter that emits emitted light by irradiation of the blue light;
Second light emission 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 irradiation with blue light transmitted through the transmission portion A light emitting plate provided with a body;
A light emitting plate driving unit that drives the light emitting plate to adjust the position of the optical path of the second light emitter and the blue light;
A controller for controlling the light emitting plate driving unit;
A light homogenizing element for homogenizing light emitted from the blue light and the first light emitter and the second light emitter;
A light modulation element that modulates the light homogenized by the light homogenization element;
And a projection unit that projects the light modulated by the light modulation element.   The light emitting plate drive unit irradiates the light emitting plate with a control signal from the controller, a first position where the blue light irradiates the second light emitter, and the blue light irradiates the second light emitter. The projection display apparatus according to claim 1, further comprising: a motor that moves the second position to a second position that is not set. The second light emitter provided on the light emitting plate is composed of a plurality of light emitting portions made of phosphors having different mixed concentrations,
2. The motor according to claim 1, wherein the light-emitting plate driving unit includes a motor that drives the light-emitting plate so that the blue light selectively irradiates one of a plurality of light-emitting units according to a control signal from the controller. The projection-type image display device described. The light-emitting plate is a disc-shaped wheel, and the second light-emitting body provided on the light-emitting plate has a plurality of light-emitting portions made of phosphors having different mixing concentrations arranged in the circumferential direction.
The light emitting plate driving unit is a motor that drives the light emitting plate in synchronization with the rotating wheel so that the blue light selectively irradiates one of a plurality of light emitting units according to a control signal from the controller; The projection display apparatus according to claim 1, comprising:   The projection display apparatus according to claim 1, wherein the second light emitter absorbs 10 to 60% of the blue light.   The emitted light of the second wavelength band includes light of a third wavelength band adjacent to the first wavelength band, and in the optical path between the first light emitter and the second light emitter, The projection display apparatus according to claim 1, further comprising a dichroic mirror that extracts light in the third wavelength band included in light emitted from the two light emitters.   A color wheel on which the blue light and the light emitted from the first light emitter and the second light emitter are incident; and the light emitted from the second wavelength band is adjacent to the first wavelength band. 3. One of the segments of the color wheel including light in the third wavelength band and receiving the blue light and the light emitted from the second light emitter transmits the blue light and the light in the third wavelength band. Item 4. The projection display apparatus according to Item 1.   The projection display apparatus according to claim 6 or 7, wherein the light in the third wavelength band has a dominant wavelength in a range of 470 nm to 530 nm.   The rotating wheel emits each color component light including at least red component light, green component light, and blue component light in a time-sharing manner, and the blue component light includes light in the first wavelength band and the third wavelength. The projection display apparatus according to claim 6 or 7, comprising a band of light.