JP2001264880A - Projection type display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the utilization efficiency of the energy of luminous flux emitted from a light source while keeping the safety of an observer and the durability of optical parts. SOLUTION: This projection type display device is equipped with a metal halide lamp 11, liquid crystal panels 31 to 33 optically modulating the luminous flux emitted from the lamp 11 in accordance with video information, and a projection lens 5 enlarging and projecting video light modulated by the panels 31 to 33 to a screen. Then, a wavelength converting element 13 selectively converting the ultraviolet light component and the infrared light component of luminous flux emitted from the lamp 11 into visible light is arranged between the lamp 11 and the panels 31 to 33.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projection display apparatus for enlarging and projecting image light obtained by optically modulating a light beam emitted from a light source onto a screen.

[0002]

2. Description of the Related Art Generally, in this type of projection display device,
In order to effectively use the luminous flux emitted radially from the light source,
A quadratic reflector is provided around the light source. In this reflector, a so-called cold mirror process that removes an ultraviolet light component that adversely affects the human body and optical components and an infrared light component that becomes heat and causes a temperature rise from a light beam emitted from a light source and reflects only a visible light component is performed. Is being done.

Further, of the light beam reflected by the reflector, ultraviolet and infrared light components that cannot be completely removed by the reflector alone are removed by a UV / IR cut filter.

[0004] Only the remaining visible light components, from which the ultraviolet light component and the infrared light component have been removed by the reflector and the UV / IR cut filter, are radiated to a light modulation element such as a liquid crystal panel, where the light modulation element is adapted to image information. Modulation is performed. The modulated image light is enlarged and projected on a screen by an enlarged projection optical system such as a projection lens.

[0005]

However, in such a conventional projection display device, the ultraviolet light component of the luminous flux emitted from the light source, which has an adverse effect on the human body and optical components, becomes heat and becomes red, which causes a temperature rise. Since the external light component is removed, the safety of the observer and the durability of the optical components can be maintained, but there is a problem that the efficiency of using the energy of the light flux emitted from the light source is reduced.

Accordingly, the present invention has been made in view of the above problems, and has been made to reduce the energy use efficiency of the luminous flux emitted from the light source while maintaining the safety of the observer and the durability of the optical components. The purpose is to improve.

[0007]

According to a first aspect of the present invention, there is provided a projection display apparatus including a light source, a light modulation element for optically modulating a light beam emitted from the light source in accordance with image information, and the light modulation element. And a projection optical system for enlarging and projecting the image light modulated on the screen,
A wavelength conversion element is provided between the light source and the light modulation element, which selectively converts ultraviolet light and infrared light components of the light flux emitted from the light source into visible light and transmits the visible light as it is. .

[0008] With this configuration, the ultraviolet light and infrared light components, which have been removed as unnecessary light, are used for displaying an image, and the energy of the light beam emitted from the light source is used efficiently. become.

Further, the wavelength conversion element converts an ultraviolet light component and an infrared light component into a blue component and a red component.

In general, it is considered that the ratio of the light amounts of the respective color components when performing color display is desirably red: green: blue = 2: 7: 1. However, a light source often used in this type of projection display device is described. In addition, the ratio of the light amount of the green light component tends to be larger than that of the other red light component and blue light component.
For this reason, the color balance is improved by using the energy of the ultraviolet light component and the infrared light component to supplement the light amounts of the red light component and the blue light component, which have smaller light amounts than the green light component.

In addition, there is provided a reflector for reflecting a light beam emitted from the light source toward the light modulation element. And is specularly reflected.

With this configuration, the light beam emitted from the light source is reflected toward the light modulation element by the reflector without removing the ultraviolet light component and the infrared light component.

According to a second aspect of the present invention, there is provided a projection display apparatus, comprising: a light source; a color separation unit for separating a light beam emitted from the light source into R, G, and B color components which are three primary colors of light; Three light modulation elements that optically modulate the light flux of each color component separated by the unit according to the video information corresponding to each of the light modulation elements;
A projection system comprising: a color synthesizing unit for synthesizing the image light of each color component modulated by the three light modulating elements; and a projection optical system for enlarging and projecting the image light synthesized by the color synthesizing unit onto a screen. A first wavelength conversion element and a light source, which are disposed between the color separation unit and the B light modulation element and selectively convert an ultraviolet light component included in the light flux of the B color component into blue light. A second wavelength conversion element or a light source which is disposed between the light source and the R color separation unit and selectively converts a yellow light component, which has been conventionally used as G to increase the color purity of R, into red light. And at least one of a third wavelength conversion element that is disposed between the ultraviolet light component and a color separation unit that separates ultraviolet light and selectively converts the ultraviolet light component and the infrared light included in the light beam into red light. It is characterized by being.

In such a configuration, when the first wavelength conversion element is used, the ultraviolet light component removed as unnecessary light is used for displaying an image, and the third wavelength conversion element is used. In this case, the ultraviolet light component and the infrared light that have been removed as unnecessary light are used for displaying an image, and the energy of the light beam emitted from the light source is used efficiently. Further, when the second wavelength conversion element is used, the light amount of the red component having a smaller light amount than that of the green component is supplemented.

In addition, a reflector for reflecting a light beam emitted from the light source toward the color separation unit is provided. It is characterized by specular reflection.

With such a configuration, the light beam emitted from the light source is reflected toward the color separation section by the reflector without removing the ultraviolet light component and the infrared light component.

Further, the light-emitting body of the light source contains mercury, and the second wavelength conversion element converts the light flux near the mercury emission peak wavelength region into a red light component.

With this configuration, the luminous flux near the emission line peak of mercury contained in the wavelength range of the green light component is converted into a red light component, the green light component decreases, and the red component increases. Thereby, the color balance is improved.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) The configuration of a projection display according to a first embodiment of the present invention will be described below with reference to the drawings.

In this embodiment, FIG. 1 is a block diagram showing a configuration of a projection display device, and FIGS. 2 to 6 are graphs showing spectral characteristics of a light source used in the projection display device.

The projection display device according to the present embodiment
As shown in FIG. 1, a light source unit 1 and a color separation unit 2 (21 to 2)
6), a light modulation section 3 (31 to 33), a dichroic prism 4 as a color synthesis section, and a projection lens 5 as a projection optical system.

The light source unit 1 includes a metal halide lamp 11
, A reflector 12, a wavelength conversion element 13, and a condenser lens 14.

As shown in FIG. 2, the wavelength of the light beam emitted from the metal halide lamp 11 is distributed over a wide band from ultraviolet light to infrared light and has a wavelength of 545 nm.
It shows spectral characteristics having peaks in the vicinity and near the wavelength of 575 nm.

FIG. 2 is a characteristic diagram of the wavelength-light intensity P (λ), and the light amount I (λ) actually sensed by the human eye is
Using the relative luminous efficiency V (λ) shown in FIG.

[0025]

(Equation 1)

FIG. 4 shows the wavelength-light amount characteristics obtained by the above equation (1).

The reflector 12 reflects not only visible light but also all light beams including infrared light and ultraviolet light.

The wavelength conversion element 13 is made of a functional fluorescent glass. This functional fluorescent glass contains rare earth ions in the glass, and the rare earth ions are excited by ultraviolet rays and infrared rays to emit fluorescence (phosphorescence).
And emits visible light. The emission spectrum can be changed depending on the type of rare earth ions contained in the glass. As shown in FIG. 5, the spectral characteristics obtained by converting the ultraviolet light component and the infrared light component into visible light via the wavelength conversion element 13 are such that the red light component and the blue light component are increased by the amounts of light indicated by oblique lines. FIG. 6 shows the wavelength-light amount characteristics obtained by the above equation 1 using the relative luminous efficiency shown in FIG. 3 as the wavelength-light intensity characteristics. Compared with the conventional wavelength-light amount characteristic shown at the same time, the light amounts of red light and blue light indicated by oblique lines increase.

In the light source unit 1 having such a configuration,
The light beam emitted from the metal halide lamp 11 is totally reflected by the reflector 12 and irradiates the wavelength conversion element 13. The luminous flux applied to the wavelength conversion element 13 has its ultraviolet light component converted to the wavelength of the blue light component, and the ultraviolet light component and the infrared light component converted to the wavelength of the red light component. Is emitted toward the color separation unit 2.

The color separation section 2 includes first to third reflection mirrors 2.
1,23,25 and dichroic mirror 24 for red color separation
And a dichroic mirror 22 for green color separation.

The red separating dichroic mirror 24 is
While selectively reflecting a red light beam and transmitting a light beam in a wavelength range smaller than the red light beam, the dichroic mirror 25 for separating green selectively reflects a green light beam and has a wavelength other than green. It transmits the luminous flux of the region.

In the color separation section 2 having such a configuration, the light beam emitted from the light source section 1 is first irradiated on the red separation dichroic mirror 24 at an angle of 45 degrees, and the red light component is incident. The light is reflected and separated at an angle of 90 degrees with respect to the light, and the remaining cyan light component (a composite component of the green light component and the blue light component) is transmitted and separated. The red light component reflected and separated enters the first reflection mirror 21 at an angle of 45 degrees, is reflected at an angle of 90 degrees with respect to the incident light, and is emitted toward the light modulation unit 3. .

The transmitted and separated cyan light component is applied to the green separation dichroic mirror 22 at an angle of 45 degrees, and the green light component is reflected and separated at an angle of 90 degrees with respect to the incident light so as to emit light. The light is emitted toward the modulator 3 and the remaining blue light component is transmitted and separated. The transmitted and separated blue light component is incident on the second reflection mirror 23 at an angle of 45 degrees, is reflected at an angle of 90 degrees with respect to the incident light, and is further reflected on the third reflection mirror 25. Is incident at an angle of 45 degrees, is reflected at an angle of 90 degrees with respect to the incident light, and is emitted toward the light modulation unit 3.

The light modulating section 3 includes a liquid crystal panel 31 for red,
The liquid crystal panel 32 includes a green liquid crystal panel 32 and a blue liquid crystal panel 33. The red liquid crystal panel 31 has a red light component reflected and separated by the red separation dichroic mirror 24 after passing through a polarizing plate (not shown). The green liquid crystal panel 32 is irradiated with the green light component reflected and separated by the green light separating dichroic mirror 22 after passing through a polarizing plate (not shown).
3 is irradiated after the blue light component transmitted through the green separation dichroic mirror 22 passes through a polarizing plate (not shown). In each of the liquid crystal panels 31 to 33, the illuminated color light is optically modulated based on the video information for each color component supplied from a video information processing unit (not shown), and the video light for each color is provided on the emission side. After passing through a polarizing plate (not shown), the light is emitted toward the dichroic prism 4.

Each image light optically modulated by the liquid crystal panels 31 to 33 enters from three main surfaces of the dichroic prism 4 opposed to the liquid crystal panels 31 to 33, respectively, and the color light from the remaining one main surface. The light is emitted toward the projection lens 5 as image light.

The color image light incident on the projection lens 5 is
The image is enlarged and projected, and an image is formed on a screen (not shown).

As described above, according to the present embodiment, of the luminous flux emitted from the metal halide lamp 11, the infrared light component and the ultraviolet light component which have not been used for display are converted into visible light for display. Therefore, the use efficiency of the energy of the light beam emitted from the light source can be improved. This makes it possible to improve the brightness of the display image displayed on the projection display device.

Further, according to the present embodiment, since the infrared light component and the ultraviolet light component are converted into the red light component and the blue light component of the visible light, the light amount is smaller than that of the green light component. The light amounts of the small red light component and the blue light component are increased, and the color balance can be improved. As a result, the image quality of the display image displayed on the projection display device can be improved.

According to the present embodiment, since the reflector 12 is configured to reflect not only visible light but also infrared light and ultraviolet light, the ultraviolet light component contained in the light beam emitted from the metal halide lamp 11 Irradiation to the wavelength conversion element 13 can be performed without impairing the infrared light component. Thereby, it is possible to further improve the utilization efficiency of the light flux emitted from the light source.

In this embodiment, the wavelength conversion element 13 is disposed between the metal halide lamp 11 and the condenser lens 14. However, the present invention is not limited to this. It may be arranged at any position between them.

In this embodiment, a so-called three-panel projection display device using three liquid crystal panels 31 to 33 has been described. However, the present invention is not limited to this.
The present invention may be applied to a so-called single-panel projection display device using one liquid crystal panel. In that case, the wavelength conversion element may be arranged at any position between the light source and the liquid crystal panel.

Further, in the present embodiment, the metal halide lamp 11 is used as a light source, but various lamps can be used without being limited thereto. (Second Embodiment) In the first embodiment described above, the case where the wavelength conversion element 13 is disposed between the metal halide lamp 11 as the light source and the color separation section 2 has been described. In the embodiment, instead of the wavelength conversion element 13, the first separation between the color separation unit 2 and the light modulation unit 3 is performed.
And the case where the second wavelength conversion element is disposed. Note that the same components as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

The projection display device according to the present embodiment
As shown in FIG. 7, a first wavelength conversion element 111 and a second
Wavelength conversion element 112. The first wavelength conversion element 111 is disposed between the first reflection mirror 21 and the liquid crystal panel 31 for red light, and of the infrared light component and the red light component reflected and separated by the red separation dichroic mirror 24. It converts an infrared light component into a wavelength of a red light component. Further, the second wavelength conversion element 112 is disposed between the third reflection mirror 25 and the blue liquid crystal panel 33,
It converts the ultraviolet light component of the ultraviolet light component and the blue light component transmitted and separated by the green separation dichroic mirror 22 into the wavelength of the blue light component.

In the projection display device having such a configuration, the light beam emitted from the metal halide lamp 11 is totally reflected by the reflector 12 including not only the visible light component but also the ultraviolet light component and the infrared light component. After that, the light is emitted toward the color separation unit 2 through the condenser lens 14.

In the color separation unit 2, the light beam emitted from the light source unit 1 is irradiated to the red separation dichroic mirror 24 at an angle of 45 degrees, and the infrared light component and the red light component are incident on the incident light. While being reflected and separated at an angle of 90 degrees, the remaining combined component of the green light component, the blue light component, and the ultraviolet light component is transmitted and separated. The reflected and separated infrared light component and red light component are incident on the first reflection mirror 21 at an angle of 45 degrees, are reflected at an angle of 90 degrees with respect to the incident light, and then are reflected by the first reflection mirror 21. The light is applied to the wavelength conversion element 111. In the first wavelength conversion element 111, the infrared light component of the infrared light component and the red light component is selectively converted into the wavelength of the red light component, the red light component is transmitted, and both red light components are transmitted. Are combined and applied to the light modulation unit 3.

The synthesized component of the green light component, the blue light component, and the ultraviolet light component that has been transmitted and separated is applied to the green separation dichroic mirror 22 at an angle of 45 degrees, and the green light component is incident on the incident light. The light is reflected and separated at an angle of 90 degrees and irradiates the light modulating unit 3, and the remaining blue light component and ultraviolet light component are transmitted and separated. The transmitted and separated blue light component and ultraviolet light component are sequentially reflected by the second and third reflection mirrors 23 and 25 at an angle of 90 degrees, and then reflected by the second and third reflection mirrors 23 and 25.
Is irradiated on the wavelength conversion element 112. In the second wavelength conversion element 112, the ultraviolet light component of the ultraviolet light component and the blue light component is selectively converted into the wavelength of the blue light component, the blue light component is transmitted, and the two blue light components are combined. Then, the light is irradiated on the light modulation unit 3.

The red light component, the green light component, and the blue light component pass through a polarizing plate (not shown) and then form a light modulator 3 and are optically converted by liquid crystal panels 31 to 33 corresponding to the respective color components. The light is modulated, synthesized by the dichroic prism 4, and enlarged and projected from the projection lens 5 onto a screen (not shown).

As described above, according to the present embodiment, the reflector 12 reflects not only visible light but also infrared light and ultraviolet light in the light flux emitted from the metal halide lamp 11 and has been used for display. The missing infrared light component and ultraviolet light component are converted into the first and second wavelength conversion elements 111 and 112.
Are converted into a red light component and a blue light component, so that the same effects as in the first embodiment described above can be obtained.

In this embodiment, the first wavelength conversion element 111 is arranged between the first reflection mirror 21 and the liquid crystal panel 31 for red, and the second wavelength conversion element 112 is Has been described between the reflection mirror 23 and the liquid crystal panel 33 for blue, but the present invention is not limited to this. The metal halide lamp 11 and the liquid crystal panel 31 for red And the second wavelength conversion element may be disposed at any position between the metal halide lamp 1 and the second wavelength conversion element.
1 and any position between the blue liquid crystal panel 33.

In the present embodiment, the first wavelength conversion element 111 for converting an infrared light component into a red light component is used.
And a case where both the second wavelength conversion element 112 for converting the ultraviolet light component to the blue light component are provided, but the same effect can be obtained if only one of them is provided. However, when only the first wavelength conversion element 111 is used, the ultraviolet light component included in the light flux of the metal halide lamp 11 is removed by the reflector 12 or the like, and when only the second wavelength conversion element 112 is used,
It is necessary for the reflector 12 and the like to remove infrared light components contained in the light flux of the metal halide lamp 11.

In the present embodiment, the metal halide lamp 11 is used as a light source, but the invention is not limited to this, and various lamps can be used. (Third Embodiment) In the above-described first and second embodiments, the case where infrared light and ultraviolet light are converted into visible light has been described. Is converted into a red light component. The same components as those in the first and second embodiments are denoted by the same reference numerals, and description thereof is omitted.

The projection type display device according to the present embodiment
As shown in FIG. 8, a dichroic mirror 124 for separating red and yellow light and a third wavelength conversion element 113 are provided. Dichroic mirror 124 for red and yellow separation
Is not only the luminous flux in the wavelength range corresponding to the infrared light component and the red light component, but also a part of the yellow light component having a wavelength of 560 nm to 590 nm, which has been conventionally used as the green light component in order to secure red purity. It selectively reflects and transmits light in other wavelength ranges. The third wavelength conversion element 113 is disposed between the first reflection mirror 21 and the liquid crystal panel 31 for red, and the infrared light component transmitted and separated by the dichroic mirror 124 for separating red and yellow, red light, It converts a part of the infrared light component and the yellow light component of the light component and the yellow light component into the wavelength of the red light component.

In the projection display device having such a configuration, the light beam emitted from the metal halide lamp 11 is totally reflected by the reflector 12 including not only the visible light component but also the ultraviolet light component and the infrared light component. After that, the light is emitted toward the color separation unit 2 through the condenser lens 14.

In the color separation section 2, the light beam emitted from the light source section 1 is converted into a red and yellow separation dichroic mirror 12.
4 at an angle of 45 degrees, the infrared light component, the red light component, and the yellow light component are reflected and separated at an angle of 90 degrees with respect to the incident light, and the remaining green light component and blue light component Then, the synthesized component of the ultraviolet light component is transmitted and separated. The infrared light component, the red light component, and the yellow light component that have been reflected and separated enter the first reflection mirror 21 at an angle of 45 degrees, and are reflected at an angle of 90 degrees with respect to the incident light. The third wavelength conversion element 113 is irradiated. Third wavelength conversion element 11
In 3, in the infrared light component, the red light component, and the yellow light component, the infrared light component and the yellow component are selectively converted into the wavelength of the red light component, and the red light component is transmitted, and all of the red light components are transmitted. The light components are combined and irradiated to the light modulation unit 3.

The synthesized component of the green light component, the blue light component, and the ultraviolet light component, which has been transmitted and separated, is applied to the green separation dichroic mirror 22 at an angle of 45 degrees, and the green light component is incident on the incident light. The light is reflected and separated at an angle of 90 degrees and irradiates the light modulating unit 3, and the remaining blue light component and ultraviolet light component are transmitted and separated. The transmitted and separated blue light component and ultraviolet light component are sequentially reflected by the second and third reflection mirrors 23 and 25 at an angle of 90 degrees, and then reflected by the second and third reflection mirrors 23 and 25.
Is irradiated on the wavelength conversion element 112. In the second wavelength conversion element 112, the ultraviolet light component of the ultraviolet light component and the blue light component is selectively converted into the wavelength of the blue light component, the blue light component is transmitted, and all the blue light components are converted. The light is combined and emitted to the light modulation unit 3.

The red light component, the green light component, and the blue light component pass through a polarizing plate (not shown), and then form a light modulator 3 and are optically converted by liquid crystal panels 31 to 33 corresponding to the respective color components. After being modulated, the light passes through a polarizing plate (not shown), is synthesized by a dichroic prism 4, and is enlarged and projected from a projection lens 5 onto a screen (not shown).

As described above, according to the present embodiment, of the luminous flux emitted from the metal halide lamp 11, only the infrared light component and the ultraviolet light component which have not been used for display are converted into visible light. In addition, since the yellow light component, which was conventionally used as the green light component, is converted into a red light component and used for display, not only is the energy efficiency of the light flux emitted from the light source improved, but also the green light component is improved. It is possible to increase the light amounts of the red light component and the blue light component, which have smaller light amounts than that of the first embodiment, and to improve the color balance.

In this embodiment, the case where the third wavelength conversion element 113 is disposed between the first reflection mirror 21 and the liquid crystal panel 31 for red has been described.
The third wavelength conversion element 11 is not limited thereto.
3 is a metal halide lamp 11 and a liquid crystal panel 3 for red.
1 may be arranged at any position.

Also, in the present embodiment, the case where both the infrared light component and the yellow light component are converted into the red component as the third wavelength conversion element 113 has been described.
Even if the wavelength conversion element converts only the yellow light component to the red light component, the same effect can be obtained. However, in this case, it is necessary to remove the infrared light component included in the light flux of the metal halide lamp 11 by the reflector 12 or the like.

In this embodiment, the metal halide lamp 11 is used as a light source. However, the present invention is not limited to this, and various lamps can be used.

Further, in the above-described first embodiment, the wavelength conversion element for converting the infrared light component and the ultraviolet light component into the wavelengths of the red light component and the blue light component, and in the second embodiment, A wavelength conversion element that converts an ultraviolet light component into a wavelength of a blue light component and a wavelength conversion element that converts an infrared light component into a red light component. In the third embodiment, the infrared light component and the yellow light component are converted into red light. Although a case has been described in which a wavelength conversion element that converts a light component and a wavelength conversion element that converts an ultraviolet light component into a blue light component are used, these wavelength conversion elements may be used alone or in combination.

[0062]

According to the present embodiment, of the luminous flux emitted from the light source, the infrared light component and the ultraviolet light component, which have not been used for display, are converted into visible light and used for display. Therefore, the utilization efficiency of the energy of the light flux emitted from the light source can be improved, and thereby the brightness of the display image displayed on the projection display device can be improved.

[Brief description of the drawings]

FIG. 1 is a configuration diagram illustrating a configuration of a projection display device according to a first embodiment of the present invention.

FIG. 2 shows a spectral characteristic (wavelength-light intensity) of a luminous flux of a metal halide lamp used in the projection display apparatus of FIG.
FIG.

FIG. 3 is a graph showing a relative luminosity curve.

FIG. 4 is a graph showing the amount of light perceived by the human eye as a luminous flux of a metal halide lamp used in the projection display of FIG. 1;

5 is a graph showing a spectral characteristic (wavelength-light intensity) of a light beam when a wavelength conversion element is mounted on a metal halide lamp used in the projection display device of FIG.

6 is a graph showing the amount of light perceived by human eyes when a wavelength conversion element is mounted on a metal halide lamp used in the projection display apparatus of FIG.

FIG. 7 is a configuration diagram illustrating a configuration of a projection display device according to a second embodiment of the present invention.

FIG. 8 is a configuration diagram illustrating a configuration of a projection display device according to a third embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 light source unit 11 metal halide lamp 12 reflector 13 wavelength conversion element 14 condenser lens 2 color separation unit 21 first reflection mirror 22 green separation dichroic mirror 23 second reflection mirror 24 red separation dichroic mirror 25 third reflection mirror 3 Light modulator 31 Liquid crystal panel for red color 32 Liquid crystal panel for green color 33 Liquid crystal panel for blue color 4 Dichroic prism 5 Projection lens

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Kensuke Konishi 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. F-term (reference) 2H088 EA14 EA15 HA13 HA21 HA24 MA20 2H091 FA01Z FA05X FA05Z FA17Z FA26Z FA41Z FA50Z FD05 LA01 LA03 LA04

Claims (6)

[Claims] 1. A light source, a light modulation element for optically modulating a light beam emitted from the light source in accordance with image information, and a projection optics for enlarging and projecting the image light modulated by the light modulation element onto a screen. And a wavelength conversion device for selectively converting an ultraviolet light component and an infrared light component of a light flux emitted from the light source between the light source and the light modulation element into visible light. A projection type display device comprising an element. 2. The projection display device according to claim 1, wherein the wavelength conversion element converts the ultraviolet light component and the infrared light component into a blue component and a red component. 3. A reflector for reflecting a light beam emitted from the light source toward the light modulation element, wherein the reflector includes not only a visible light component but also an ultraviolet light component and an infrared light component of the light beam emitted from the light source. 3. The projection display apparatus according to claim 1, wherein the projection display apparatus performs specular reflection including light components. 4. A light source, a color separation unit that separates a light beam emitted from the light source into first to third color components, and a light beam of each of the color components separated by the color separation unit. First to third optically modulating according to the obtained video information
Light modulating element, a color synthesizing unit for synthesizing the image light of each color component modulated by the first to third light modulating elements, and enlarging and projecting the image light synthesized by the color synthesizing unit onto a screen A projection optical system, comprising: a projection optical system configured to select an infrared light component that is disposed between the color separation unit and the first light modulation element and that is included in the light flux of the first color component. A first wavelength conversion element for selectively converting to red light, disposed between the color separation unit and the first light modulation element, for selectively converting a part of the second color component to red light; A second wavelength conversion element, or a second wavelength conversion element that selectively converts an ultraviolet light component included in the light flux of the third color component into blue light between the color separation unit and the third light modulation element. A projection display device comprising at least one of the three wavelength conversion elements. 5. A reflector for reflecting a light beam emitted from the light source toward the color separation unit, wherein the reflector includes not only a visible light component but also an ultraviolet light component and an infrared light component of the light beam emitted from the light source. 5. The projection type display device according to claim 4, wherein specular reflection is performed including light components. 6. The light source of the light source contains mercury, and the second wavelength conversion element converts a luminous flux in a yellow wavelength region near a mercury emission line peak into a red light component. 6. The projection display device according to 4 or 5.