JP2014186081A - Light source device and projection video display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light source device allowing a plurality of colour reproduction modes with a simple configuration, and provide a projection video display device using the light source device.SOLUTION: The light source device comprises: a blue semiconductor laser 101 emitting light; a phosphor wheel 200 which is provided rotatably and includes a phosphor excited by light to emit fluorescent light; a colour trim wheel 300 which is provided rotatably, and removes some wavelength bands of the fluorescent light and has a region transmitting the light therethrough; and phase adjustment means which adjusts phases of the phosphor wheel and the colour trim wheel.

Description

  The present disclosure relates to a light source device using a laser and a phosphor, and more particularly to a light source device that emits visible light such as red, green, and blue, and a projection display apparatus using the light source device.

  2. Description of the Related Art Today, projectors are widely used as projection display devices that enlarge and project various images and the like onto a screen. In accordance with the video signal, light emitted from the light source is modulated by a spatial light modulation element such as a digital micromirror device (DMD) or a liquid crystal display element and displayed on a screen.

  In projectors, high-intensity ultra-high-pressure water source lamps have been used as light sources to obtain bright and large-screen images, but when ultra-high-pressure mercury lamps are used as light sources, the life of the light source is short and the surface tension is complicated. There was a problem of becoming.

  In order to solve these problems, a new projection display apparatus using a solid-state laser and a phosphor instead of an ultra-high pressure mercury lamp has been proposed (for example, Patent Document 1).

JP 2012-212129 A

  A light source device using a phosphor can obtain high-intensity light with a small emission area by using laser light that can be condensed at high density as excitation light. However, since the fluorescent light emitted from the phosphor is light in a very wide wavelength range compared to the laser light, the light source of the image display device is a means for removing a part of the fluorescent light and extracting light in the necessary wavelength range. It is necessary to provide.

  As a conventional technique, a phosphor layer is formed on a first wheel using a disc-shaped transparent substrate using two wheels, and the phosphor layer is irradiated with excitation light to emit fluorescence. A dichroic filter layer is formed on a second wheel using a disc-shaped transparent substrate, and a light having a specific wavelength is transmitted through the dichroic layer, and the first and second wheels are synchronized to obtain a desired light source. A configuration of a light source device that emits light has been proposed.

  The light source device is intended to be applied to an image display device. By synchronizing two wheels, light in a specific wavelength range of at least three colors of red, green, and blue can be emitted. However, by synchronizing, the light amount of each color is uniquely determined, and in order to have multiple color reproduction modes, the light amount of other colors can be reduced based on the light amount of a specific color that is rate-limiting. realizable. However, in that case, a problem of light quantity reduction occurs.

  The present disclosure is for solving the above-described problems, and in a light source device using a phosphor wheel and a dichroic wheel, a light source device capable of realizing a plurality of color reproduction modes with a simple configuration and the light source device are used. An object is to provide a projection display apparatus.

  A light source device (for example, the light source device 10) according to the present disclosure includes a light source (for example, a blue semiconductor laser 101) that emits light and a phosphor that is rotatably provided and emits fluorescence when excited by light. And a wavelength-selective wheel (for example, a color trim wheel) that is rotatably provided and has a region that removes a part of the wavelength band of the fluorescence and transmits light. 300) and phase adjusting means for adjusting the phases of the phosphor wheel and the wavelength selective wheel.

  According to the present disclosure, by adjusting the phases of the phosphor wheel and the wavelength selective wheel, the timing of the color light emitted from the light source device can be changed with a simple configuration, and the user's request and video can be adaptively adjusted. Multiple color reproduction modes can be realized.

  In the above-described light source device, the wavelength selective wheel removes the first wavelength band from the fluorescence and transmits the light (for example, the green non-transmissive region 703), and the second wavelength of the fluorescence. A second region that removes the band and transmits light (for example, a red light non-transmissive region 704) may be included.

  A projection display apparatus according to the present disclosure (for example, the projection display apparatus 1) is provided so as to be rotatable with a light source (for example, a blue semiconductor laser 101) that emits light, and is excited by light to emit fluorescence. A phosphor wheel (for example, phosphor wheel 200) provided with a phosphor that emits light, and a wavelength-selective wheel that is rotatably provided and has a region that removes a part of the wavelength band of the fluorescence and transmits light. (For example, color trim wheel 300), a light source unit (for example, light source device 10) having phase adjusting means for adjusting the phases of the phosphor wheel and the wavelength selective wheel, and light emitted from the light source unit in space. An image generation unit (for example, DMD 124) that generates an image by modulation and a projection lens (for example, projection lens 125) that projects the image generated by the image generation unit are provided. It is intended.

  According to the present disclosure, it is possible to provide a light source device that realizes a plurality of color reproduction modes with a simple configuration. In addition, a projection display apparatus having a plurality of color reproduction modes can be provided by using this light source device.

1 is an external perspective view of a projection display apparatus according to the present disclosure. It is a block diagram which shows the optical structure of the projection type video display apparatus concerning this indication. It is a block diagram which shows the optical structure of the light source device which concerns on this indication. It is a schematic diagram which shows the structure of the phosphor wheel which concerns on 1st Embodiment. It is a schematic diagram which shows the structure of the color trim wheel which concerns on 1st Embodiment. It is a schematic diagram explaining the drive principle of the color priority mode which concerns on 1st Embodiment. It is a schematic diagram explaining the drive principle of the brightness priority mode which concerns on 1st Embodiment. It is a schematic diagram which shows the structure of the phosphor wheel which concerns on 2nd Embodiment. It is a schematic diagram which shows the structure of the color trim wheel which concerns on 2nd Embodiment. It is a schematic diagram explaining the drive principle of the color priority mode which concerns on 2nd Embodiment. It is a schematic diagram explaining the drive principle of the brightness priority mode which concerns on 2nd Embodiment.

  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 applicant provides the accompanying drawings and the following description in order for those skilled in the art to fully understand the present disclosure, and is not intended to limit the subject matter described in the claims. Absent.
(Configuration of projection display device)
An outline of the projection display apparatus 1 will be described with reference to FIGS. 1 and 2. FIG. 1 is an external perspective view of the projection display apparatus 1. The projection display apparatus 1 includes a light source device 10, a digital mirror device (hereinafter referred to as DMD) 124, and a projection lens 125. The projection display apparatus 1 generates an image by reflecting light emitted from the light source device 10 with the DMD 124. The projection display apparatus 1 projects the generated image on the screen via the projection lens 125.

  FIG. 2 is a schematic diagram for explaining the optical configuration of the projection display apparatus 1. For the following explanation, in FIG. 2, the XYZ orthogonal coordinate system shown in the figure is taken. Details of the light source device 10 will be described later.

  The light emitted from the rod integrator 118 of the light source device 10 relays the exit opening of the rod integrator 118 to the DMD 124 using a relay lens system composed of the condensing lenses 119, 120 and 121. Note that after exiting the condenser lens 121 that forms a part of the relay lens system, the light enters the total reflection prism 122 composed of two triangular prisms.

  The total reflection prism 122 is formed by two triangular prisms and an air layer 123 provided therebetween, and the light transmitted through the condenser lens 121 and incident on the total reflection prism 122 is reflected at the interface with the air layer 123. , Change its direction and enter the DMD 124.

  The DMD 124 is formed by two-dimensionally arranging micromirrors, and each mirror forms a signal light that is temporally modulated by changing its inclination according to red, green, and blue video input signals. To do. When the DMD 124 is driven by a red video signal, the light source device 10 described later is controlled to output red light.

Similarly, when the DMD 124 is driven by green and blue video signals, the light source device 10 is controlled to output green and blue light. The signal light modulated by the DMD 124 is projected onto a screen (not shown) by the projection lens 125.
(Configuration of light source device)
FIG. 3 shows a configuration diagram of the light source device 10 according to the present embodiment. The output light of the light source device 10 is composed of laser light and fluorescence, and can be used as illumination light for the projection display apparatus 1 and the like.

  The laser light source is a blue semiconductor laser 101, and includes a plurality of blue semiconductor lasers 101 in order to realize a high-intensity light source device. The laser light emitted from each blue semiconductor laser 101 is collimated by the corresponding collimator lens 102. The light emitted from the collimator lens 102 is a substantially parallel light beam.

  The entire luminous flux is collected by the condenser lens 103, passes through the diffuser plate 104, and is then converted into substantially parallel light again by the afocal lens 105. The laser beam converted into substantially parallel light by the afocal lens 105 is incident on a dichroic mirror 106 disposed at approximately 45 degrees on the optical axis. The diffusion plate 104 is a glass flat plate, and a diffusion surface with fine irregularities is formed on one side.

  The dichroic mirror 106 has a characteristic of reflecting light in the wavelength range of blue light emitted from the blue semiconductor laser 101. At the same time, the blue light emitted from the blue semiconductor laser 101 has a transmission characteristic with respect to the fluorescence excited by a phosphor described later.

  Light incident on the dichroic mirror 106 from the −X direction in the figure is reflected by the dichroic mirror 106, changes its traveling direction by 90 degrees, and is emitted in the −Z direction in the figure. Thereafter, the light is condensed by the condensing lenses 107 and 108 and condensed onto the phosphor formed on the phosphor wheel 200.

  The fluorescence (yellow, green) emitted from the phosphor wheel 200 in the + Z direction in the drawing passes through the condenser lenses 108 and 107 and enters the dichroic mirror 106. The dichroic mirror 106 has a characteristic of transmitting fluorescence (yellow, green) excited by blue light emitted from the blue semiconductor laser 101. Therefore, the fluorescence (yellow, green) incident on the dichroic mirror 106 passes through the dichroic mirror 106, passes through the condenser lens 117, and enters the color trim wheel 300.

  On the other hand, the blue light emitted from the blue semiconductor laser 101 that has passed through the blue transmission region 205 (opening) of the phosphor wheel 200 is emitted in the -Z direction in the figure, and forms a part of the relay lens system. After passing through 109 and 110, it enters the total reflection mirror 111. The light incident on the total reflection mirror 111 changes its traveling direction by 90 degrees, is emitted in the -X direction in the figure, passes through a condenser lens 112 constituting a part of the relay lens system and a diffusion plate (not shown), The light enters the reflection mirror 113. The light incident on the total reflection mirror 113 changes its traveling direction by 90 degrees, is emitted in the + Z direction in the figure, passes through the condenser lens 114 constituting a part of the relay lens system, and enters the total reflection mirror 115. . The light incident on the total reflection mirror 115 is changed by 90 degrees in the traveling direction by the total reflection mirror 115, is emitted in the + X direction in the figure, passes through the condensing lens 116 constituting the relay lens system, and enters the dichroic mirror 106. Incident.

The dichroic mirror 106 has a characteristic of reflecting light in the wavelength range of blue light emitted from the blue semiconductor laser 101. Therefore, the blue light incident on the dichroic mirror 106 changes its traveling direction by 90 degrees and is emitted in the + Z direction in the figure. Thereafter, the light is condensed by the condenser lens 117 and enters the color trim wheel 300.
(First embodiment)
[Configuration of wheel]
Details of the phosphor wheel 200 according to the first embodiment will be described with reference to FIG. FIG. 4A is a side view of the phosphor wheel 200. The phosphor wheel 200 has a configuration in which a base material 202 is attached to a motor 201. The base material 202 is provided with a yellow phosphor 203 and a green phosphor 204. FIG. 4B is a front view of the phosphor wheel 200, and a blue transmissive region 205 in which a part of a hollow circumference is hollowed on a base material 202 attached on a motor 201 provided at the center; Similarly, a yellow phosphor 203 and a green phosphor 204 are provided as part of the hollow circumference.

  The yellow phosphor 203 is a phosphor that is excited by blue light emitted from the blue semiconductor laser 101 and emits fluorescence in the yellow wavelength region. On the other hand, the green phosphor 204 is a phosphor that is excited by blue light emitted from the blue semiconductor laser 101 and emits fluorescence in the green wavelength region.

  Details of the color trim wheel 300 according to the first embodiment will be described with reference to FIG. FIG. 5A is a side view of the color trim wheel 300, and the color trim wheel has a configuration in which a base material 302 having a property of transmitting light is attached to a motor 301. FIG. 5B is a front view of the color trim wheel 300, and the blue light emitted from the blue semiconductor laser 101 and the fluorescence in all the wavelength ranges are emitted to the base material 302 attached to the motor 301 provided at the center. Two regions are provided: a blue light transmission region 305 that transmits light, and a green light non-transmission region 303 that transmits blue light emitted from the blue semiconductor laser 101 and light in the red wavelength region and does not transmit light in the green region. ing. The green light non-transmissive region 303 is formed of a multilayer dielectric multilayer film on a base material 302 formed of a material that transmits light.

  Here, the phase of the color trim wheel 300 is adjusted with respect to the phosphor wheel 200 by a phase adjustment circuit (not shown). The present disclosure is characterized in that the state of the emitted light as the light source system can be changed by adjusting the phase. The details of the method of changing the color state by phase adjustment will be described below with reference to FIGS.

[Wheel operation]
1. Color Priority Mode With reference to FIG. 6, a mode used when displaying a colorful video will be described. For convenience, this mode is hereinafter referred to as a color priority mode. FIG. 6A shows the state of the phosphor wheel 200 in the color priority mode. FIG. 6B shows the state of the color trim wheel 300 in the color priority mode. The phosphor wheel 200 and the color trim wheel 300 are rotated in the direction of the solid line arrow in the figure. The phases of the phosphor wheel 200 and the color trim wheel 300 are the start timing of the yellow phosphor 203 on the phosphor wheel 200 and the start timing of the green light non-transmissive region 303 of the color trim wheel 300 at a position in the 0 o'clock direction. It is driven in synchronism by a phase adjustment circuit (not shown).

  FIG. 6C shows the timing of emitted light formed by the phosphor wheel 200 shown in FIG. 6A and the color trim wheel 300 shown in FIG. 6B.

  From the 0 o'clock direction, yellow fluorescent light is emitted from the phosphor wheel 200, and the color trim wheel 300 starts the green light non-transmitting region 303 at the same timing, and the red color obtained by removing the green fluorescent region from the yellow fluorescent light is emitted. FIG. 6C shows the timing as a red emission region 401. Subsequently, after the timing when the green light non-transmissive region 303 of the color trim wheel 300 ends, yellow fluorescence emitted from the phosphor wheel 200 is emitted as it is. FIG. 6C shows the timing as a yellow emission region 402.

  After the yellow phosphor 203 of the phosphor wheel 200 is finished and the green phosphor 204 is started, green fluorescence is emitted from the phosphor wheel 200, passes through the color trim wheel 300 as it is, and green fluorescence is emitted as it is. In FIG. 6C, the timing is indicated by a green emission region 403.

  In the phosphor wheel 200, the green phosphor 204 ends, and then the blue light emitted from the blue semiconductor laser 101 is emitted from the phosphor wheel 200, and the color trim wheel 300 is emitted from the blue semiconductor laser 101. Blue light is transmitted and emitted as it is. In FIG. 6C, the timing is indicated by a blue emission region 404.

  Thus, the phosphor wheel 200 and the color trim wheel 300 make a round, return to the direction of 0 o'clock, and then repeat the above-described behavior. Therefore, as shown in FIG. 6C, light is emitted in the order of the red emission region 401, the yellow emission region 402, the green emission region 403, and the blue emission region 404. FIG. 6D shows the amount of emitted light of each color emitted at the timing of this color priority mode.

2. Brightness Priority Mode A mode different from the color priority mode will be described with reference to FIG. Here, in order to distinguish from the color priority mode, it is referred to as a brightness priority mode. In addition, it demonstrates below that this mode becomes bright with respect to a color priority mode.

  FIG. 7A shows the state of the phosphor wheel 200. Here, for the sake of explanation, the phosphor wheel 200 has the position where the yellow phosphor 203 starts as the 0 o'clock direction, as in the color priority mode shown in FIG. FIG. 7B shows the color trim wheel 300. In the color trim wheel 300, the angle of the green light non-transmissive region 303 is the same in both the color priority mode and the brightness priority mode. However, in the brightness priority mode, the phase is advanced in the counterclockwise direction with respect to the color priority mode by a phase adjustment circuit (not shown) as indicated by a dotted arrow in the figure.

  FIG. 7 (c) shows the timing of the emitted light formed by the phosphor wheel 200 shown in FIG. 7 (a) and the color trim wheel 300 shown in FIG. 7 (b).

  From the 0 o'clock direction, yellow fluorescent light is emitted from the phosphor wheel 200, and the color trim wheel 300 has the green light non-transmissive region 303 at the same timing, and the red color obtained by removing the green fluorescent region from the yellow fluorescent light is emitted. FIG. 7C shows the timing as a red emission region 411.

  After the timing when the green light non-transmission region 303 of the color trim wheel 300 ends, the yellow fluorescence emitted from the phosphor wheel 200 is emitted as it is. FIG. 7C shows the timing as a yellow emission region 412.

  After the yellow phosphor 203 of the phosphor wheel 200 is finished and the green phosphor 204 is started, green fluorescence is emitted from the phosphor wheel 200, passes through the color trim wheel 300 as it is, and green fluorescence is emitted as it is. FIG. 7C shows the timing with a green emission region 413.

  In the phosphor wheel 200, the green phosphor 204 ends, and then the blue light emitted from the blue semiconductor laser 101 is emitted from the phosphor wheel 200. FIG. 7C shows the timing as a blue emission region 414.

  In the color trim wheel 300, the green light non-transmission region 303 starts. At that time, the light emitted from the phosphor wheel 200 is blue light emitted from the blue semiconductor laser 101, and the green light of the color trim wheel 300 is displayed. The non-transmissive region 303 is transmitted as it is. Therefore, the blue emission region 414 is shown in FIG.

  Thus, the phosphor wheel 200 and the color trim wheel 300 make a round, return to the direction of 0 o'clock, and then repeat the above-described behavior. Therefore, as shown in FIG. 7C, light is emitted in the order of the red emission region 411, the yellow emission region 412, the green emission region 413, and the blue emission region 414. FIG. 7D shows the amount of emitted light of each color emitted at the timing of this brightness priority mode.

  Here, comparing FIG. 6C and FIG. 7C, the red emission region is smaller in the red emission region 411 in FIG. 7C than in the red emission region 401 in FIG. 6C. Yes. On the other hand, in the yellow emission region, the yellow emission region 412 in FIG. 7C is larger than the yellow emission region 402 in FIG. Therefore, when FIG. 6D is compared with FIG. 7D, the light amount 501 surrounded by the dotted line of the red light amount in FIG. 7D disappears, whereas the light amount 502 surrounded by the solid line of the yellow light amount. It is increased by the amount. In the case of red and yellow, the amount of light in red is reduced by the amount obtained by removing green from the color trim wheel 300.

  Therefore, the configuration shown in FIG. 7 is brighter than the configuration shown in FIG. On the contrary, the configuration of FIG. 6 has a larger amount of red than the configuration of FIG. Therefore, the configuration of FIG. 6 is the color priority mode, and the configuration of FIG. 7 is the brightness priority mode.

  In the description of this configuration, the timing of the phosphor wheel 200 is fixed and the timing of the color trim wheel 300 is changed by shifting the phase. However, the present invention is not limited to this configuration, and the timing of the color trim wheel 300 is fixed. Then, by shifting the phase of the phosphor wheel 200, the same effect as described above can be realized.

  The phase shift of the color trim wheel 300 with respect to the phosphor wheel 200 can be freely changed by a phase adjustment circuit (not shown), and a mode configuration other than the color priority mode and the brightness priority mode is employed. Can do.

Returning to FIG. 2, the light emitted from the color trim wheel 300 is incident on the rod integrator 118 as light uniformizing means. The rod integrator 118 is a solid square columnar glass component. The light that has entered the rod integrator 118 is totally reflected at the interface of the rod integrator 118, thereby realizing uniformization without loss of light quantity and exiting from the exit surface of the rod integrator 118.
(Second Embodiment)
[Configuration of wheel]
Details of the phosphor wheel 600 according to the second embodiment will be described with reference to FIG. FIG. 8A is a side view of the phosphor wheel 600, and FIG. 8B is a front view of the phosphor wheel 600. In this embodiment, since the phosphor wheel 600 and the color trim wheel 700 are used in place of the phosphor wheel 200 and the color trim wheel 300 of FIG. 3, the description of the optical configuration of the light source device is omitted, and the first Differences from the phosphor wheel 200 and the color trim wheel 300 of the embodiment will be mainly described.

  The phosphor wheel 600 has a configuration in which a substrate 602 is attached to a motor 601. The base material 602 has a hollow shape, and is attached to a motor 601 provided at the center of the phosphor wheel 600 so as to fit the hollow portion. The base material 602 is provided with a blue transmission region 605 in which a part of the circumference is hollowed out, and a yellow phosphor 603 in the other part of the circumference. The yellow phosphor 603 is a phosphor that is excited by blue light emitted from the blue semiconductor laser 101 and emits fluorescence in the yellow wavelength region.

  Details of the color trim wheel 700 according to the second embodiment will be described with reference to FIG. FIG. 9A is a side view of the color trim wheel 700, and FIG. 9B is a front view of the color trim wheel 700.

The color trim wheel 700 has a structure in which a base material 702 having a characteristic of transmitting light is attached to a motor 701. The base material 702 has a hollow shape, and is attached to a motor 701 provided at the center of the color trim wheel 700 so as to fit the hollow portion.
The substrate 702 includes a blue light transmission region 705 that transmits light in all the wavelength ranges of blue light and fluorescence emitted from the blue semiconductor laser 101, and blue light and red light in the red wavelength region emitted from the blue semiconductor laser 101. The green light non-transmissive region 703 that transmits the light in the green region, the blue light emitted from the blue semiconductor laser 101 and the light in the green wavelength region, and the red light non-transmissive that does not pass the light in the red region. Three types of areas, the area 704, are provided.

  Further, as shown in FIG. 9B, two blue light transmission regions 705 that transmit blue light emitted from the blue semiconductor laser 101 and light in all the wavelength regions of fluorescence are provided. The green light non-transmissive region 703 and the red light non-transmissive region 704 are each formed of a multilayer dielectric film on a base material 702 that transmits light.

  Here, the phase of the color trim wheel 700 is adjusted with respect to the phosphor wheel 600 by a phase adjustment circuit (not shown). The present disclosure is characterized in that the state of the emitted light as the light source system can be changed by adjusting the phase. The details of the method of changing the color state by phase adjustment will be described below with reference to FIGS.

[Wheel operation]
1. Color priority mode A mode used when displaying a colorful image will be described with reference to FIG. For convenience, this mode is hereinafter referred to as a color priority mode. FIG. 10A shows a state of the phosphor wheel 600 in the color priority mode. FIG. 10B shows the state of the color trim wheel 700 in the color priority mode. The phosphor wheel 600 and the color trim wheel 700 are rotated in the direction of solid arrows in the drawing. The phases of the phosphor wheel 600 and the color trim wheel 700 show the start timing of the yellow phosphor 603 in the phosphor wheel 600 and the start timing of the green light non-transmission region 703 of the color trim wheel in the position of the 0 o'clock direction. It is driven in synchronism by a phase adjustment circuit that is not implemented.

  FIG. 10 (c) shows the timing of the emitted light formed by the phosphor wheel 600 shown in FIG. 10 (a) and the color trim wheel 700 shown in FIG. 10 (b).

  From the 0 o'clock direction, yellow fluorescent light is emitted from the phosphor wheel 600, and the color trim wheel 700 starts the green light non-transmissive region 703 at the same timing, and the red color obtained by removing the green light region from the yellow fluorescent light is emitted. FIG. 10C shows the timing as a red emission region 801. Subsequently, after the timing when the green light non-transmissive region 703 of the color trim wheel 700 ends, yellow fluorescence emitted from the phosphor wheel 600 is emitted as it is. FIG. 10C shows the timing as a yellow emission region 802.

  Next, at the timing when the red light non-transmission region 704 of the color trim wheel 700 starts, yellow fluorescence is emitted from the phosphor wheel 600, and the color trim wheel 700 is the red light non-transmission region 704. Green light except light is emitted. FIG. 10C shows the timing as a green emission region 803. At the timing when the yellow phosphor 603 of the phosphor wheel 600 ends and the blue light transmission region 705 starts, the color trim wheel 700 is still the red light non-transmission region 704.

  At the timing when the blue light transmission region 705 starts, the light emitted from the phosphor wheel 600 is blue light emitted from the blue semiconductor laser 101, and the color trim wheel 700 has a characteristic of not transmitting green light. At timing 704, the blue light is transmitted as it is. FIG. 10C shows the timing as a blue emission region 804. At the timing when the red light non-transmission region 704 of the color trim wheel 700 ends and the blue light transmission region 705 starts, the phosphor wheel 600 is the blue transmission region 605.

  At this timing, blue light emitted from the blue semiconductor laser 101 is emitted from the phosphor wheel 600, passes through the blue light transmission region 705 of the color trim wheel 700, and the blue light emitted from the blue semiconductor laser 101 is emitted. . In FIG. 10C, the blue emission region 804 is continuously shown.

  Thus, the phosphor wheel 600 and the color trim wheel 700 make a round, return to the direction of 0 o'clock, and then repeat the above-described behavior. Therefore, as shown in FIG. 10C, light is emitted in the order of the red emission region 801, the yellow emission region 802, the green emission region 803, and the blue emission region 804. FIG. 10D shows the amount of emitted light of each color emitted at the timing of this color priority mode.

2. Brightness Priority Mode A mode different from the color priority mode will be described with reference to FIG. Here, in order to distinguish from the color priority mode, it is referred to as a brightness priority mode. In addition, it demonstrates below that this mode becomes bright with respect to a color priority mode.

  FIG. 11A shows the state of the phosphor wheel 600. Here, for the sake of explanation, the phosphor wheel 600 sets the position where the yellow phosphor 603 starts as the 0 o'clock direction, as in the color priority mode shown in FIG. FIG. 11B shows a color trim wheel 700. In the color trim wheel 700, the angle of the green light non-transmissive region 703 and the red light non-transmissive region 704 is the same in both the color priority mode and the brightness priority mode. However, in the brightness priority mode, the phase is advanced in the counterclockwise direction with respect to the color priority mode by a phase adjustment circuit (not shown) as indicated by a dotted arrow in the figure.

  FIG. 11 (c) shows the timing of the emitted light formed by the phosphor wheel 600 shown in FIG. 11 (a) and the color trim wheel 700 shown in FIG. 11 (b).

  From the 0 o'clock direction, yellow fluorescent light is emitted from the phosphor wheel 600, and the color trim wheel 700 has the green light non-transmissive region 703 at the same timing, and the red color obtained by removing the green light region from the yellow fluorescent light is emitted. FIG. 11C shows the timing as a red emission region 811.

  After the timing when the green light non-transmissive region 703 of the color trim wheel 700 ends, the yellow fluorescence emitted from the phosphor wheel 600 is emitted as it is. FIG. 11C shows the timing as a yellow emission region 812.

  The color trim wheel 700 ends the blue light transmission region 705 and the red light non-transmission region 704 begins. After this timing, green light from which red light is omitted by the color trim wheel 700 is emitted from the yellow fluorescence emitted from the phosphor wheel 600. FIG. 11C shows the timing as a green emission region 813.

  In the phosphor wheel 600, the yellow phosphor 603 ends, and then the blue light emitted from the blue semiconductor laser 101 is emitted from the phosphor wheel 600. In FIG. 10C, the timing is indicated by a blue emission region 814. At this timing, since the color trim wheel 700 is the blue light transmission region 705, the blue light emitted from the blue semiconductor laser 101 that has passed through the phosphor wheel 600 passes through the color trim wheel 700.

  In the color trim wheel 700, the green light non-transmissive region 703 starts. At that time, the light emitted from the phosphor wheel 600 is blue light emitted from the blue semiconductor laser 101, and the green light of the color trim wheel 700 is emitted. The non-transmissive region 703 transmits as it is. Therefore, the blue emission region 814 is shown in FIG.

  As described above, the phosphor wheel 600 and the color trim wheel 700 make a round, return to the direction of 0 o'clock, and thereafter repeat the above-described behavior. Therefore, as shown in FIG. 11C, light is emitted in the order of the red emission area 811, the yellow emission area 812, the green emission area 813, and the blue emission area 814. FIG. 11D shows the amount of emitted light of each color emitted at the timing of the brightness priority mode.

  Here, comparing FIG. 10C and FIG. 11C, the red emission region 811 in FIG. 11C is smaller in the red emission region than in the red emission region 801 in FIG. 10C. Yes. On the other hand, in the green emission region, the green emission region 813 in FIG. 11C is larger than the green emission region 803 in FIG. Therefore, when FIG. 10D and FIG. 11D are compared, the light amount 901 surrounded by the dotted line of the red light amount in FIG. 11D disappears, whereas the light amount 902 surrounded by the solid line of the green light amount. Has only increased. In red and green, even in the same angle region, the amount of light in green is greater than that in red.

  Therefore, the configuration of FIG. 11 is brighter than the configuration of FIG. On the contrary, in the configuration of FIG. 10, the amount of red contained in the configuration of FIG. Therefore, the configuration of FIG. 10 is a color priority mode, and the configuration of FIG. 11 is a brightness priority mode.

  In the description of this configuration, the timing of the phosphor wheel 600 is fixed and the timing of the color trim wheel 700 is changed by shifting the phase. However, the present invention is not limited to this configuration, and the timing of the color trim wheel 700 is fixed. In addition, by shifting the phase of the phosphor wheel 600, the same effect as described above can be realized.

The phase shift of the color trim wheel 700 with respect to the phosphor wheel 600 can be freely changed by a phase adjustment circuit, and other mode configurations can be adopted besides the color priority mode and the brightness priority mode.
(Other forms)
In each of the above-described embodiments, description has been made so as to be configured by three colors of red, green, and blue. However, in addition to the three colors, configurations of four or more colors including yellow, cyan, magenta, and white are added. It may be. Moreover, although the structure which provides an opening part in a base material in the timing which blue light radiate | emits from a fluorescent substance wheel was demonstrated, it is good also as a permeation | transmission area | region using only a transparent base material.

  In each of the above-described embodiments, the rod integrator has been described as a solid glass quadrangular prism, but any other component that can achieve the same effect can be substituted. Specifically, a configuration in which a reflecting surface is disposed on the inner surface in a hollow quadrangular prism shape may be used. Moreover, although the incident surface and exit surface of the rod integrator have been described as having the same shape, the sizes of the entrance surface and the exit surface may be changed.

  As described above, the embodiment considered as the best mode and other embodiments are provided by the accompanying drawings and the detailed description. These are provided to those skilled in the art to illustrate the claimed subject matter by reference to specific embodiments. Therefore, various modifications, replacements, additions, omissions, and the like can be made to the above-described embodiments within the scope of the claims or an equivalent scope thereof.

  The present disclosure can be applied to a projection display apparatus using a light valve.

DESCRIPTION OF SYMBOLS 1 Projection type image display apparatus 10 Light source apparatus 101 Blue semiconductor laser 102 Collimator lens 103 Condensing lens 104 Diffuser plate 105 Afocal lens 106 Dichroic mirror 107, 108, 109, 110, 112, 114, 116, 117, 119, 120, 121 Condenser lenses 111, 113, 115 Total reflection mirror 118 Rod integrator 122 Total reflection prism 123 Air layer 124 DMD
125 Projection lens 200, 600 Phosphor wheel 201, 301, 601, 701 Motor 202, 602 Base material 203, 603 Yellow phosphor 204 Green phosphor 205, 605 Blue transmission region 300, 700 Color trim wheel 302, 702 Base material 303 , 703 Green light non-transmission area 305, 705 Blue light transmission area 401, 411, 801, 811 Red emission area 402, 412, 802, 812 Yellow emission area 403, 413, 803, 813 Green emission area 404, 414, 804, 814 Blue emission area 501, 502, 901, 902 Light quantity 704 Red light non-transmission area

Claims (3)

A light source that emits light;
A phosphor wheel provided so as to be rotatable, and a phosphor wheel that is excited by the light and emits fluorescence; and
A wavelength-selective wheel that is rotatably provided and has a region that removes a part of the wavelength band of the fluorescence and transmits the light;
Phase adjusting means for adjusting the phase of the phosphor wheel and the wavelength selective wheel;
A light source device comprising: The light source device according to claim 1,
The wavelength selective wheel removes a first wavelength band from the fluorescence and transmits the light, and removes a second wavelength band from the fluorescence and transmits the light. Two regions,
A light source device comprising: A light source that emits light;
A phosphor wheel provided so as to be rotatable, and a phosphor wheel that is excited by the light and emits fluorescence; and
A wavelength-selective wheel that is rotatably provided and has a region that removes a part of the wavelength band of the fluorescence and transmits the light;
A phase adjusting means for adjusting the phase of the phosphor wheel and the wavelength selective wheel, and a light source unit,
A video generation unit that generates a video by spatially modulating light emitted from the light source unit;
A projection lens that projects the image generated by the image generation unit;
A projection-type image display device comprising:

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