KR20120103072A - Light source apparatus and method for manufacturing the same - Google Patents

Abstract

PURPOSE: A light apparatus and a manufacturing method thereof are provided to block foreign materials flowing through a via hole. CONSTITUTION: A light apparatus(100) comprises a light source(110), an optical system(120), and a color wheel(130). The light source emits excitation light. The optical system images excitation light. The color wheel emits colored lights based on the imaged excitation light. The color wheel comprises a fluorescent layer and a first dichroic member. The fluorescent layer changes the wavelength of the excitation light. The first dichroic member reflects or projects the specific wavelength of the changed excitation light.

Description

LIGHT SOURCE APPARATUS AND METHOD FOR MANUFACTURING THE SAME

The present specification relates to a light source device and a method of manufacturing the same.

In general, the light source device according to the prior art separates the excitation light of the light source into a plurality of color lights and emits the plurality of color lights.

It is an object of the present specification to provide a light source device and a method of manufacturing the same that can efficiently improve color reproducibility through a light source and a wavelength converting material.

A light source device according to embodiments of the present disclosure includes a light source for generating excitation light; An optical system for forming the excitation light; A color wheel for generating a plurality of color lights based on the formed excitation light, the color wheel comprising: a fluorescent layer for converting a wavelength of the excitation light; The wavelength may include a first dichroic member that transmits or reflects a specific wavelength band of the converted light.

As an example related to the present invention, the light source device is provided between the light source and the optical system, and reflects the excitation light toward the optical system and transmits a plurality of dichroic light generated by the color wheel. The member may further include.

As an example related to the present invention, the color wheel further includes a transparent plate positioned between the fluorescent layer and the first dichroic member, wherein the first dichroic member is the wavelength transmitted through the transparent plate. The specific wavelength band of the converted light can be transmitted or reflected.

As an example related to the present invention, the fluorescent layer generates red light, and the first dichroic member reflects wavelengths of 460 nm or less and more than 600 nm in the red light, and exceeds 460 nm and is 600 nm or less. Can be transmitted.

As an example related to the present invention, the fluorescent layer may generate green light, and the first dichroic member may reflect a wavelength of 590 nm or less among wavelengths of the green light, and transmit a wavelength exceeding 590 nm.

As an example related to the present invention, the fluorescent layer generates yellow light, and the first dichroic member reflects wavelengths of 480 nm or less and 500 nm or more in the yellow light, and transmits a wavelength exceeding 480 nm and less than 500 nm. You can.

As an example related to the present invention, the color wheel further includes a transparent plate, and the first dichroic member is located between the transparent plate and the fluorescent layer, and the wavelength of the light converted by the fluorescent layer is specified. It can transmit or reflect the wavelength band.

As an example related to the present invention, the color wheel is formed on the first dichroic member, has a via hole, and further comprises a metal plate for transmitting the light passing through the first dichroic member through the via hole. The first dichroic member may be positioned between the fluorescent layer and the metal plate, and may transmit or reflect a specific wavelength band of light whose wavelength is converted by the fluorescent layer.

As an example related to the present invention, the metal plate may further include a transparent plate covering the via hole.

As an example related to the present invention, the color wheel may include: a light absorbing part formed on the first dichroic member and absorbing light passing through the first dichroic member; And a metal plate formed on the light absorbing part, wherein the first dichroic member is positioned between the fluorescent layer and the light absorbing part and has a specific wavelength band of light whose wavelength is converted by the fluorescent layer. Can be transmitted or reflected.

As an example related to the present invention, the light absorbing part may be a black paint absorbing light transmitted by the first dichroic member or a pigment selectively absorbing a specific wavelength band.

A method of manufacturing a light source device according to embodiments of the present disclosure includes: imaging an excitation light generated by a light source through an optical system; Forming a fluorescent layer converting the wavelengths of the excitation light formed through the optical system into a plurality of color lights; And forming a first dichroic member on the flat plate that transmits or reflects a specific wavelength band of each of the plurality of color lights, and the fluorescent layer may be formed on the flat plate or the first dichroic member. .

The light source device and the manufacturing method according to the embodiments of the present invention, a wavelength conversion material (for example, a fluorescent layer) for converting the wavelength of the excitation light, and a dichro to selectively separate the wavelength region of the wavelength-converted light The blade member has an effect of efficiently improving color reproducibility.

A light source device and a manufacturing method according to embodiments of the present invention may be formed on the dichroic member, have a via hole (or through hole), and transmit the light passing through the dichroic member to the via hole. There is also an effect that can quickly cool the heat generated in the fluorescent layer through a metal plate to transmit through.

The light source device and the manufacturing method according to the embodiments of the present invention also have the effect of blocking the foreign matter flowing through the via hole through the transparent plate covering the via hole of the metal plate.

1 is a configuration diagram schematically illustrating a projection system to which a light source device is applied according to embodiments of the present invention.
2 is a front view showing a color wheel of a light source device according to embodiments of the present invention.
3 is a block diagram showing a color wheel of the light source device according to the first embodiment of the present invention.
4 and 5 are diagrams showing the spectrum and reflectance of red light according to embodiments of the present invention.
6 and 7 illustrate spectra and reflectances of green light according to embodiments of the present invention.
8 and 9 illustrate spectra and reflectances of yellow light according to embodiments of the present invention.
10 is a configuration diagram showing a color wheel of the light source device according to the second embodiment of the present invention.
11 is a configuration diagram showing a color wheel of the light source device according to the third embodiment of the present invention.
12 is a configuration diagram showing a color wheel of the light source device according to the fourth embodiment of the present invention.
13 is a configuration diagram illustrating a color wheel of the light source device according to the fifth embodiment of the present invention.

Hereinafter, a light source device and a method thereof capable of efficiently improving color reproducibility through light sources and wavelength converting materials (Phosphor, Quantum dots) will be described with reference to FIGS. 1 to 13.

1 is a configuration diagram schematically illustrating a projection system to which a light source device is applied according to embodiments of the present invention.

As shown in FIG. 1, a projection system (for example, a projector) to which a light source device according to embodiments of the present invention is applied includes: a light source 110; Optics (eg, focusing optics) 120; A color wheel 130 having a wavelength converting material; A light integrator 202; Delay optics or collecting optics 204; A prism 206; Microdisplay imager 208 and projection lens 210. Since the projection system is also disclosed in Korean Patent Publication No. 10-2010-0037646, a detailed description thereof will be omitted.

Light (light) output from the light source 110 becomes a plurality of color light through the color wheel 130, and passes through the light concentrator 202 for high intensity homogenization (scrambling). The light source 110 may be a general lamp or a semiconductor solid state light source including a laser diode and a light emitting diode (LED). The light wavelength of the semiconductor light source may generally have a range of 300 nm to 800 nm or more. For example, a light emitting diode (eg, a blue LED) may be used as the semiconductor light source, a deep blue LED may be used, an ultraviolet (UV) LED may be used, or a laser diode may be used.

The delay optical system 204 forms (condenses) the scrambled light through the prism 206 into the microdisplay imager 208.

Light modulated by the microdisplay imager 208 is projected through the projection lens 210 onto the display screen.

The multicolor image is obtained through synchronization between the microdisplay imager 208 and the color wheel 130 (the signal processor controlling the color wheel 130 and the microdisplay imager is not shown).

The light source device 100 according to the embodiments of the present invention includes a light source 110 for generating excitation light; An optical system 120 for forming the excitation light; And a color wheel (130) for generating a plurality of color lights based on the formed excitation light, the color wheel (130) comprising: a fluorescent layer for converting wavelengths of the excitation light; It may include a dichroic member (first dichroic member) for selectively separating the wavelength region of the wavelength-converted light. The dichroic member transmits or reflects a specific wavelength band of the light whose wavelength is converted.

In addition, the light source device 100 may further include a dichroic filter (second dichroic member) 140 installed between the light source and focusing optics. The dichroic filter is a material that transmits or reflects a part of the excitation light according to a wavelength. The dichroic filter transmits light of a short wavelength, reflects light of a long wavelength, or reflects light of a short wavelength, It can also transmit light. The second dichroic member reflects the excitation light toward the optical system and transmits a plurality of color lights generated by the color wheel.

The light source 110 may be one or a plurality of laser diodes or light emitting diodes.

The color wheel 130 includes respective wavelength converting materials for converting the excitation light of the light source 110 into different kinds of wavelengths in order to realize illumination. For example, the color wheel 130 is rotated by a motor (rotation or linear vibration) to sequentially separate the color from the excitation light to generate a plurality of high-intensity color light (multicolor light). The color wheel 130 may apply light emitted from the wavelength converting material to the light concentrator 202.

Since the wavelength converting material generally has a wide spectral distribution, color reproducibility may be improved by using a dichroic filter that removes a portion of the spectrum. However, the location where a dichroic filter can be used is limited because light having multiple colors must pass through the same optical path. In addition, the light source device generates high-temperature heat by condensing high power light to the wavelength conversion material in order to construct a high brightness light source. When the dichroic filter is applied, such a wavelength conversion material Cooling should also be considered.

2 is a front view showing a color wheel of a light source device according to embodiments of the present invention.

As shown in Fig. 2, the color wheel 130 of the light source device according to the embodiment of the present invention is circular divided into two or more (eg, four) segments each containing a wavelength conversion material. It may be a structure. The color wheel 130 rotates to sequentially generate light of different colors over time by different wavelength converting materials.

For example, the color wheel 130 may be formed of red, green, blue and yellow wavelength converting materials (for example, four different colors). It may be divided into four segments each containing a fluorescent layer). Angular size of the parts may be the same or may be different. The blue segment may be simply a transparent material without a blue wavelength converting material when a blue light source is used. The blue segment may include a material such as a diffuser that diffuses light.

The wavelength conversion material may be a phosphorescent material including nanomaterials such as quantum dots and phosphors. In addition, the wavelength conversion material may be a fluorescent material.

Hereinafter, the color wheel of the light source device according to the first embodiment of the present invention will be described with reference to FIG.

3 is a block diagram showing a color wheel of the light source device according to the first embodiment of the present invention.

As shown in FIG. 3, the color wheel 130 of the light source device according to the first embodiment of the present invention includes a wavelength conversion material (eg, a fluorescent layer) 131 for converting the wavelength of the excitation light; A transparent plate 132 for transmitting the light whose wavelength is converted; The dichroic member 133 may selectively include a wavelength region of the wavelength-transformed light transmitted through the flat plate 132. The light source 110 may be one or a plurality of laser diodes or light emitting diodes. The dichroic member 133 transmits or reflects a specific wavelength band of the light whose wavelength is converted.

In FIG. 3, a denotes excitation light of the light source 110, b denotes light emitted by converting the wavelength by the fluorescent layer 131, and c denotes light converted by the fluorescent layer 131. Represents light reflected by the dichroic member 133, and d represents light transmitted through the dichroic member 133. Here, the light b reflected by the dichroic member 133 among the light b whose wavelength is converted and emitted by the fluorescent layer 131 and the light whose wavelength is converted by the fluorescent layer 131 is detected. ) Can be used as the light used in the projector.

The fluorescent layer 131 emits the omnidirectional light after the excitation light a is converted by the wavelength conversion material therein and is reflected in the direction in which the excitation light a is incident. Since the amount of light is about 60 to 70% of the excitation light a, the light efficiency is improved by using the light reflected from the color wheel 130 as in the present invention.

Light traveling in the fluorescent layer 131 in the direction (Y direction) of the flat plate 132 is reflected by the dichroic member 133 and travels in the X direction. That is, since the light c is emitted by being combined with the light b, the light efficiency is increased.

The plate 132 may be formed of a light transmitting material such as glass, quartz, plastic such as polymethly methacrylate (PMMA), or the like.

The wavelength conversion material (fluorescent layer) 131 may be deposited or doped on the surface of the flat plate 132. The wavelength conversion material 131 is excited by excitation light emitted from the light source 110 to emit light having a wavelength range different from that emitted from the light source 110.

The wavelength conversion material (eg, the fluorescent layer) 131 is formed on a portion of the surface of the flat plate 132. For example, the wavelength conversion material (for example, four different fluorescent layers) of the red, green, blue, and yellow portions of the red segment may be formed on the flat plate ( Formed on a portion of the first surface (eg, bottom surface) of 132.

The dichroic member 133 transmits or reflects a specific wavelength band of the light whose wavelength is converted, and is formed on a portion of the surface of the flat plate 132. For example, each of the red, green, blue, and yellow portions of the wavelength converting material (for example, four different fluorescent layers) coincide with each other. It is located in a direction opposite to the size, and is formed on a part of the surface of the second surface (for example, the upper surface) of the plate 132. That is, the plate 132 is positioned (formed) between the dichroic member 133 and the wavelength conversion material (for example, the fluorescent layer) 131. The dichroic member 133 and / or the wavelength conversion material (eg, the fluorescent layer) 131 may be formed on the flat plate 132 in a film form or deposited through a conventional semiconductor process.

Hereinafter, the spectrum and the reflectance according to the wavelength of the light whose wavelength is converted by the fluorescent layer 131 will be described with reference to FIGS. 4 to 9. The light whose wavelength is converted by the fluorescent layer 131 may have a wide band.

4, 6, and 8 are diagrams showing spectra of wavelength converted light through a fluorescent layer. Red light shows 450 ~ 750nm, green light shows 470 ~ 660nm and yellow light shows 490 ~ 680nm. As described above, when the band distribution of each light is mixed, various colors are mixed, and there is a problem of low color purity.

4 and 5 are diagrams showing the spectrum and reflectance of red light according to embodiments of the present invention.

As shown in FIG. 4, the red light wavelength-converted by the fluorescent layer 131 may have a 450 to 750 nm band. That is, since red light is converted into light of a wide band (approximately 450 to 750 nm band), in order to increase color purity, impure light is removed through the dichroic member 133.

As shown in FIG. 5, the dichroic member 133 reflects wavelengths of less than 460 nm and more than 600 nm among red light of 450 to 750 nm band wavelength-converted by the fluorescent layer 131, and reflects 460 nm. It exceeds and transmits the wavelength which is 600 nm or less, and color purity is improved.

6 and 7 illustrate spectra and reflectances of green light according to embodiments of the present invention.

As shown in FIG. 6, the green light wavelength-converted by the fluorescent layer 131 has a band of 470 nm to 660 nm. That is, since green light is converted into light of a wide band (approximately 470-660 nm band), in order to increase color purity, the impure light is removed through the dichroic member 133.

As shown in FIG. 7, the dichroic member 133 reflects a wavelength of 590 nm or less in the green light of 470-660 nm band that is wavelength-converted by the fluorescent layer 131, and a wavelength exceeding 590 nm. By transmitting, color purity is improved.

8 and 9 illustrate spectra and reflectances of yellow light according to embodiments of the present invention.

As shown in FIG. 8, the yellow light wavelength-converted by the fluorescent layer 131 has a band of 490 nm to 680 nm. That is, since yellow light is converted into light of a wide band (approximately 490-680 nm band), in order to increase color purity, impure light is removed through the dichroic member 133.

As shown in FIG. 9, the dichroic member 133 reflects wavelengths of 480 nm or less and 500 nm or more among yellow light of 490-680 nm band wavelength-converted by the fluorescent layer 131, and exceeds 480 nm. The color purity is improved by transmitting a wavelength of less than 500 nm. The light d passing through the dichroic member 133 is discarded.

Therefore, the light source device according to the first embodiment of the present invention, a wavelength conversion material (for example, a fluorescent layer) 131 for converting the wavelength of the excitation light, and a transparent flat plate for transmitting the light converted to the wavelength ( 132 and the dichroic member 133 for selectively separating the wavelength region of the light whose wavelength is transmitted through the flat plate 132 can be efficiently improved color reproducibility.

Hereinafter, the color wheel of the light source device according to the second embodiment of the present invention will be described with reference to FIG.

10 is a configuration diagram showing a color wheel of the light source device according to the second embodiment of the present invention.

As shown in FIG. 10, the color wheel 130 of the light source device according to the second embodiment of the present invention includes a wavelength conversion material (for example, a fluorescent layer) 131 for converting the wavelength of the excitation light; A dichroic member (133) for selectively separating the wavelength region of the light whose wavelength is converted by the wavelength conversion material (131); The dichroic member 133 may include a transparent plate 132 that transmits light. The dichroic member 133 and the wavelength conversion material (for example, a fluorescent layer) 131 may be formed on the flat plate 132 in the form of a film or may be deposited through a semiconductor process.

The light source 110 may be one or a plurality of laser diodes or light emitting diodes. The dichroic member 133 transmits or reflects a specific wavelength band of the light whose wavelength is converted.

In FIG. 10, a denotes excitation light of the light source 110, b denotes light emitted by converting wavelength by the fluorescent layer 131, and c denotes light converted by wavelength by the fluorescent layer 131. Represents light reflected by the dichroic member 133, and d represents light transmitted through the dichroic member 133. Here, the light b reflected by the dichroic member 133 among the light b whose wavelength is converted and emitted by the fluorescent layer 131 and the light whose wavelength is converted by the fluorescent layer 131 is detected. ) Can be used as the light used in the projector.

Since the amount of light reflected by the fluorescent layer 131 in the direction in which the excitation light a is incident is about 60 to 70%, light efficiency is improved by using light reflected from the color wheel 130 as in the present invention. .

Light traveling in the fluorescent layer 131 in the direction (Y direction) of the flat plate 132 is reflected by the dichroic member 133 and travels in the X direction. That is, since the light c is emitted by being combined with the light b, the light efficiency is increased.

The flat plate 132 may be formed of a light transmitting material such as glass, quartz, plastic such as polymethly methacrylate (PMMA), or the like.

The wavelength conversion material (fluorescent layer) 131 may be deposited or doped on the surface of the dichroic member 133. The wavelength conversion material 131 is excited by excitation light emitted from the light source 110 to emit light having a wavelength range different from that emitted from the light source 110.

The wavelength conversion material (eg, the fluorescent layer) 131 is formed on a part of the surface of the dichroic member 133. For example, the red, green, blue, and yellow portions of the wavelength converting material (e.g., four different fluorescent layers) may each be the dike. It is formed on the surface of the rotor member 133.

The dichroic member 133 transmits or reflects a specific wavelength band of the light whose wavelength is converted, and is disposed between a portion of the surface of the plate 132 and the wavelength conversion material (eg, a fluorescent layer) 131. Is formed. Here, the wavelength conversion material (for example, the fluorescent layer) 131 may be formed smaller or the same as the dichroic member 133.

Therefore, the light source device according to the second embodiment of the present invention, the wavelength conversion material (for example, the fluorescent layer) 131 for converting the wavelength of the excitation light and the wavelength conversion material 131 by the wavelength conversion material 131 Color reproducibility can be efficiently improved through the dichroic member 133 that selectively separates the wavelength region of the converted light and the transparent plate 132 that transmits the light passing through the dichroic member 133. .

Hereinafter, the color wheel of the light source device according to the third embodiment of the present invention will be described with reference to FIG.

11 is a configuration diagram showing a color wheel of the light source device according to the third embodiment of the present invention.

As shown in Fig. 11, the color wheel 130 of the light source device according to the third embodiment of the present invention includes a wavelength conversion material (e.g., a fluorescent layer) 131 for converting the wavelength of the excitation light; A dichroic member 133 formed on the wavelength conversion material (for example, a fluorescent layer) 131 and selectively separating a wavelength region of the light whose wavelength is converted by the wavelength conversion material 131; ; Light formed on the dichroic member 133 and having a via hole (or through hole) 330-1 and passing through the dichroic member 133 to the via hole 330-1. It may include a metal plate 330 to transmit through). The dichroic member 133 and the wavelength conversion material (eg, the fluorescent layer) 131 may be formed on the flat plate 132 in the form of a film or may be deposited through a conventional semiconductor process. The via hole 330-1 may be formed through a conventional semiconductor process.

The light source 110 may be one or a plurality of laser diodes or light emitting diodes. The dichroic member 133 transmits or reflects a specific wavelength band of the light whose wavelength is converted.

In FIG. 11, a denotes excitation light of the light source 110, b denotes light emitted by converting the wavelength by the fluorescent layer 131, and c denotes light converted by the fluorescent layer 131. The light reflected by the dichroic member 133 is represented, and d represents light transmitted through the dichroic member 133 and the via hole 330-1 of the metal plate 330. Here, the light b reflected by the dichroic member 133 among the light b whose wavelength is converted and emitted by the fluorescent layer 131 and the light whose wavelength is converted by the fluorescent layer 131 is detected. ) Can be used as the light used in the projector.

Since the amount of light reflected by the fluorescent layer 131 in the direction in which the excitation light a is incident is about 60 to 70%, light efficiency is improved by using light reflected from the color wheel 130 as in the present invention. .

Light traveling in the fluorescent layer 131 in the direction (Y direction) of the flat plate 132 is reflected by the dichroic member 133 and travels in the X direction. That is, since the light c is emitted by being combined with the light b, the light efficiency is increased.

The metal plate 330 may be formed of various metals such as copper, silver, gold, and the like, and have a via hole 330-1 through which the light transmitted through the dichroic member 133 passes.

The wavelength conversion material (fluorescent layer) 131 may be deposited or doped on the surface of the dichroic member 133. The wavelength conversion material 131 is excited by excitation light emitted from the light source 110 to emit light having a wavelength range different from that emitted from the light source 110.

The wavelength conversion material (eg, the fluorescent layer) 131 is formed on a part of the surface of the dichroic member 133. For example, the red, green, blue, and yellow portions of the wavelength converting material (e.g., four different fluorescent layers) may each be the dike. It is formed on the surface of the rotor member 133.

The dichroic member 133 transmits or reflects a specific wavelength band of the wavelength-converted light and is disposed between a portion of the surface of the metal plate 330 and the wavelength conversion material (eg, a fluorescent layer) 131. Is formed. Here, the wavelength conversion material (for example, the fluorescent layer) 131 may be formed smaller or the same as the dichroic member 133.

Therefore, the light source device according to the third embodiment of the present invention, the wavelength conversion material (for example, the fluorescent layer) 131 for converting the wavelength of the excitation light and the wavelength conversion material (for example, the fluorescent layer) A dichroic member 133 formed on the 131 and selectively separating the wavelength region of the light whose wavelength is converted by the wavelength conversion material 131, and formed on the dichroic member 133. And a metal plate 330 having a via hole (or through hole) 330-1 and transmitting light passing through the dichroic member 133 through the via hole 330-1. Through this, color reproducibility can be efficiently improved.

In addition, the light source device according to the third embodiment of the present invention is formed on the dichroic member 133, has a via hole (or through hole) 330-1, and the dichroic The heat generated in the fluorescent layer may be rapidly cooled through the metal plate 330 that transmits the light passing through the member 133 through the via hole 330-1. For example, the heat generated by the fluorescent layer can be cooled faster when the metal flat plate is used than the transparent flat plate made of the glass, quartz, or transparent plastic.

Hereinafter, the color wheel of the light source device according to the fourth embodiment of the present invention will be described with reference to FIG.

12 is a configuration diagram showing a color wheel of the light source device according to the fourth embodiment of the present invention.

As shown in FIG. 12, the color wheel 130 of the light source device according to the fourth embodiment of the present invention includes a wavelength converting material (for example, a fluorescent layer) 131 for converting the wavelength of the excitation light; A dichroic member 133 formed on the wavelength conversion material (for example, a fluorescent layer) 131 and selectively separating a wavelength region of the light whose wavelength is converted by the wavelength conversion material 131; ; A transparent plate 330-2 formed on the dichroic member 133 and covering a via hole (or through hole) 330-1 and the via hole 330-1; The metal plate 330 may transmit the light passing through the dichroic member 133 through the via hole 330-1 and the transparent plate 330-2. The dichroic member 133 and / or the wavelength conversion material (eg, the fluorescent layer) 131 may be formed on the flat plate 132 in the form of a film or may be deposited through a conventional semiconductor process. The via hole 330-1 may be formed through a conventional semiconductor process.

The metal plate 33 is a transparent plate 330 such as transparent glass, transparent crystal, transparent plastic, etc. covering the via hole 330-1 to prevent foreign substances from flowing through the via hole 330-1. It may further comprise -2). For example, transparent to cover the via hole 330-1 by adhering any one of transparent glass, transparent crystal, and transparent plastic to the metal plate 33 to cover the via hole 330-1. The plate 330-2 may be formed on the metal flat plate 33.

The light source 110 may be one or a plurality of laser diodes or light emitting diodes. The dichroic member 133 transmits or reflects a specific wavelength band of the light whose wavelength is converted.

In FIG. 12, a denotes excitation light of the light source 110, b denotes light emitted by converting the wavelength by the fluorescent layer 131, and c denotes light converted by the fluorescent layer 131. The light reflected by the dichroic member 133 is represented, and d represents light transmitted through the dichroic member 133 and the via hole 330-1 of the metal plate 330. Here, the light b reflected by the dichroic member 133 among the light b whose wavelength is converted and emitted by the fluorescent layer 131 and the light whose wavelength is converted by the fluorescent layer 131 is detected. ) Can be used as the light used in the projector.

Since the amount of light reflected by the fluorescent layer 131 in the direction in which the excitation light a is incident is about 60 to 70%, light efficiency is improved by using light reflected from the color wheel 130 as in the present invention. .

Light traveling in the fluorescent layer 131 in the direction (Y direction) of the flat plate 132 is reflected by the dichroic member 133 and travels in the X direction. That is, since the light c is emitted by being combined with the light b, the light efficiency is increased.

The metal plate 330 may be formed of various metals such as copper, silver, gold, and the like, and have a via hole 330-1 through which the light transmitted through the dichroic member 133 passes.

The wavelength conversion material (fluorescent layer) 131 may be deposited or doped on the surface of the dichroic member 133. The wavelength conversion material 131 is excited by excitation light emitted from the light source 110 to emit light having a wavelength range different from that emitted from the light source 110.

The wavelength conversion material (eg, the fluorescent layer) 131 is formed on a part of the surface of the dichroic member 133. For example, the red, green, blue, and yellow portions of the wavelength converting material (e.g., four different fluorescent layers) may each be the dike. It is formed on the surface of the rotor member 133.

The dichroic member 133 transmits or reflects a specific wavelength band of the wavelength-converted light and is disposed between a portion of the surface of the metal plate 330 and the wavelength conversion material (eg, a fluorescent layer) 131. Is formed. Here, the wavelength conversion material (for example, the fluorescent layer) 131 may be formed smaller or the same as the dichroic member 133.

Therefore, the light source device according to the fourth embodiment of the present invention, the wavelength conversion material (for example, the fluorescent layer) 131 for converting the wavelength of the excitation light and the wavelength conversion material (for example, the fluorescent layer) A dichroic member 133 formed on the 131 and selectively separating the wavelength region of the light whose wavelength is converted by the wavelength conversion material 131, and formed on the dichroic member 133. Light having a via hole (or through hole) 330-1 and a transparent plate 330-2 covering the via hole 330-1 and passing through the dichroic member 133. The color reproducibility may be efficiently improved through the metal plate 330 transmitting through the metal plate 330 transmitting through the via hole 330-1 and the transparent plate 330-2.

In addition, the light source device according to the fourth embodiment of the present invention may quickly cool the heat generated in the fluorescent layer through the metal plate 330.

In addition, the light source device according to the fourth exemplary embodiment of the present invention may block foreign substances introduced through the via holes through the transparent plate 330-2 covering the via holes 330-1 of the metal flat plate 330. .

Hereinafter, the color wheel of the light source device according to the fifth embodiment of the present invention will be described with reference to FIG.

13 is a configuration diagram illustrating a color wheel of the light source device according to the fifth embodiment of the present invention.

As shown in FIG. 13, the color wheel 130 of the light source device according to the fifth embodiment of the present invention includes a wavelength conversion material (for example, a fluorescent layer) 131 for converting the wavelength of the excitation light; A dichroic member 133 formed on the wavelength conversion material (for example, a fluorescent layer) 131 and selectively separating a wavelength region of the light whose wavelength is converted by the wavelength conversion material 131; ; A light absorbing part (400) formed on the dichroic member (133) and absorbing light transmitted through the dichroic member (133); It may include a metal plate 330 formed on the light absorbing portion 400. The dichroic member 133, the wavelength conversion material (eg, the fluorescent layer) 131, and / or the light absorbing part 400 may be formed on the flat plate 132 in a film form or may be a conventional semiconductor process. It may be deposited through.

The light absorbing part 400 is formed between the metal plate 330 and the dichroic member 133. In addition, the light absorbing part 400 is a black painting that absorbs the light transmitted through the dichroic member 133, or selectively absorbs light of a specific (partial) wavelength band (wavelength region). It may be a pigment. The black paint or the pigment is formed on the metal plate 330.

The light source 110 may be one or a plurality of laser diodes or light emitting diodes. The dichroic member 133 transmits or reflects a specific wavelength band of the light whose wavelength is converted.

In FIG. 13, a represents excitation light of the light source 110, b represents light emitted by converting the wavelength by the fluorescent layer 131, and c represents light converted by the fluorescent layer 131. Light reflected by the dichroic member 133 is shown. The light transmitted through the dichroic member 133 is absorbed by the light absorbing part 400. Here, the light b reflected by the dichroic member 133 among the light b whose wavelength is converted and emitted by the fluorescent layer 131 and the light whose wavelength is converted by the fluorescent layer 131 is detected. ) Can be used as the light used in the projector.

Since the amount of light reflected by the fluorescent layer 131 in the direction in which the excitation light a is incident is about 60 to 70%, light efficiency is improved by using light reflected from the color wheel 130 as in the present invention. .

Light traveling in the fluorescent layer 131 in the direction (Y direction) of the flat plate 132 is reflected by the dichroic member 133 and travels in the X direction. That is, since the light c is emitted by being combined with the light b, the light efficiency is increased.

The metal plate 330 may be various metals such as copper, silver, and gold.

The wavelength conversion material (fluorescent layer) 131 may be deposited or doped on the surface of the dichroic member 133. The wavelength conversion material 131 is excited by excitation light emitted from the light source 110 to emit light having a wavelength range different from that emitted from the light source 110.

The wavelength conversion material (eg, the fluorescent layer) 131 is formed on a part of the surface of the dichroic member 133. For example, the red, green, blue, and yellow portions of the wavelength converting material (e.g., four different fluorescent layers) may each be the dike. It is formed on the surface of the rotor member 133.

The dichroic member 133 transmits or reflects a specific wavelength band of the light whose wavelength is converted, and is formed between the light absorbing part 400 and the wavelength converting material (eg, a fluorescent layer) 131. do. Here, the wavelength conversion material (for example, the fluorescent layer) 131 may be formed smaller or the same as the dichroic member 133.

Therefore, the light source device according to the fifth embodiment of the present invention, the wavelength conversion material (for example, the fluorescent layer) 131 for converting the wavelength of the excitation light and the wavelength conversion material (for example, the fluorescent layer) A dichroic member 133 formed on the 131 and selectively separating the wavelength region of the light whose wavelength is converted by the wavelength conversion material 131, and formed on the dichroic member 133. And a metal plate 330 transmitting through the light absorbing unit 400 absorbing the light transmitted through the dichroic member 133 and the metal plate 330 formed on the light absorbing unit 400. Through this, color reproducibility can be efficiently improved.

As described above, the light source device and the manufacturing method according to the embodiments of the present invention, the wavelength conversion material (for example, a fluorescent layer) for converting the wavelength of the excitation light, and the wavelength region of the wavelength-converted light The color reproducibility can be efficiently improved through the dichroic member which selectively separates.

A light source device and a manufacturing method according to embodiments of the present invention may be formed on the dichroic member, have a via hole (or through hole), and transmit the light passing through the dichroic member to the via hole. The heat generated in the fluorescent layer may be rapidly cooled through the metal plate transmitted through the film.

The light source device and the manufacturing method according to the embodiments of the present invention may block foreign substances introduced through the via hole through the transparent plate covering the via hole of the metal plate.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

110: light source 120: optical system
130: color wheel 140: dichroic filter
202: optical focuser 204: delay optical system
206: prism 208: microdisplay imager
210: projection lens

Claims (16)

A light source for generating excitation light;
An optical system for forming the excitation light;
A color wheel for generating a plurality of color lights based on the formed excitation light, the color wheel comprising: a fluorescent layer for converting a wavelength of the excitation light; And a first dichroic member transmitting or reflecting a specific wavelength band of the light whose wavelength is converted. The method of claim 1, wherein the light source device,
And a second dichroic member disposed between the light source and the optical system, the second dichroic member reflecting the excitation light toward the optical system and transmitting a plurality of color lights generated by the color wheel. The method of claim 1, wherein the color wheel,
And a transparent plate positioned between the fluorescent layer and the first dichroic member, wherein the first dichroic member transmits or reflects a specific wavelength band of the wavelength-converted light transmitted through the transparent plate. Light source device, characterized in that. The method of claim 1, wherein the fluorescent layer generates red light, and the first dichroic member reflects a wavelength of 460 nm or less and more than 600 nm in the red light, and transmits a wavelength of more than 460 nm and 600 nm or less. Or the fluorescent layer generates green light, and the first dichroic member reflects a wavelength of 590 nm or less in the wavelength of the green light, transmits a wavelength exceeding 590 nm, or the fluorescent layer is yellow light. Wherein the first dichroic member reflects wavelengths of 480 nm or less and 500 nm or more in the yellow light, and transmits a wavelength exceeding 480 nm and less than 500 nm. The method of claim 1, wherein the color wheel,
A metal plate formed on the first dichroic member, the via plate having a via hole and transmitting light passing through the first dichroic member through the via hole, wherein the first dichroic member includes: A light source device positioned between a fluorescent layer and the metal plate, and transmitting or reflecting a specific wavelength band of light whose wavelength is converted by the fluorescent layer. The method of claim 5, wherein the metal plate,
The light source device further comprises a transparent plate covering the via hole. The method of claim 1, wherein the color wheel,
A light absorbing part formed on the first dichroic member and absorbing light passing through the first dichroic member;
And a metal plate formed on the light absorbing part, wherein the first dichroic member is positioned between the fluorescent layer and the light absorbing part and has a specific wavelength band of light whose wavelength is converted by the fluorescent layer. A light source device, characterized in that the transmission or reflection. The method of claim 10, wherein the light absorption unit,
And a black paint absorbing light transmitted by the first dichroic member or a pigment selectively absorbing a specific wavelength band. Imaging the excitation light generated by the light source through an optical system;
Forming a fluorescent layer converting the wavelengths of the excitation light formed through the optical system into a plurality of color lights;
And forming a first dichroic member on the plate for transmitting or reflecting a specific wavelength band of each of the plurality of color lights, wherein the fluorescent layer is formed on the plate or the first dichroic member. The manufacturing method of the light source apparatus made into. 10. The method of claim 9,
And positioning a second dichroic member that reflects the excitation light toward the optical system and transmits the plurality of color lights between the light source and the optical system. The method of claim 9, wherein the forming of the first dichroic member on a flat plate comprises:
And forming a transparent plate between the fluorescent layer and the first dichroic member, wherein the first dichroic member transmits or reflects a specific wavelength band of each light transmitted through the transparent plate. The manufacturing method of the light source apparatus made into. The method of claim 9, wherein the fluorescent layer generates red light, and the first dichroic member reflects wavelengths of 460 nm or less and more than 600 nm in the red light, and transmits a wavelength of more than 460 nm and 600 nm or less. Or the fluorescent layer generates green light, and the first dichroic member reflects a wavelength of 590 nm or less in the wavelength of the green light, transmits a wavelength exceeding 590 nm, or the fluorescent layer is yellow light. Wherein the first dichroic member reflects wavelengths of 480 nm or less and 500 nm or more in the yellow light, and transmits a wavelength exceeding 480 nm and less than 500 nm. The method of claim 9, wherein the plate,
A metal plate formed on the first dichroic member and having a via hole and transmitting light passing through the first dichroic member through the via hole, wherein the first dichroic member is formed of the fluorescent layer; A method of manufacturing a light source device, which is formed between the metal plates and transmits or reflects a specific wavelength band of the respective light that has passed through the via hole of the metal plate. The method of claim 13,
And forming a transparent plate covering the via hole in the metal plate. 10. The method of claim 9,
And forming a light absorbing part for absorbing the light passing through the first dichroic member between the first dichroic member and the flat plate. The method of claim 15, wherein the light absorbing unit,
A black coating material for absorbing light transmitted by the first dichroic member or a pigment for selectively absorbing a specific wavelength band.

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