KR101804123B1 - Light source device and projector comprising the same - Google Patents

Light source device and projector comprising the same Download PDF

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Publication number
KR101804123B1
KR101804123B1 KR1020150156916A KR20150156916A KR101804123B1 KR 101804123 B1 KR101804123 B1 KR 101804123B1 KR 1020150156916 A KR1020150156916 A KR 1020150156916A KR 20150156916 A KR20150156916 A KR 20150156916A KR 101804123 B1 KR101804123 B1 KR 101804123B1
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KR
South Korea
Prior art keywords
light source
light
shape
phosphor
excitation light
Prior art date
Application number
KR1020150156916A
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Korean (ko)
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KR20170054149A (en
Inventor
강호중
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액츠 주식회사
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
    • F21S2/005—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction of modular construction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K2/00—Non-electric light sources using luminescence; Light sources using electrochemiluminescence
    • F21K2/06—Non-electric light sources using luminescence; Light sources using electrochemiluminescence using chemiluminescence
    • F21K2/08—Non-electric light sources using luminescence; Light sources using electrochemiluminescence using chemiluminescence activated by an electric field, i.e. electrochemiluminescence
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/02—Controlling the distribution of the light emitted by adjustment of elements by movement of light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
    • F21V19/003—Fastening of light source holders, e.g. of circuit boards or substrates holding light sources
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B15/00—Special procedures for taking photographs; Apparatus therefor
    • G03B15/02—Illuminating scene
    • G03B15/03—Combinations of cameras with lighting apparatus; Flash units
    • G03B15/04—Combinations of cameras with non-electronic flash apparatus; Non-electronic flash units
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B2215/00—Special procedures for taking photographs; Apparatus therefor
    • G03B2215/05—Combinations of cameras with electronic flash units
    • G03B2215/0564—Combinations of cameras with electronic flash units characterised by the type of light source

Abstract

The present invention provides a light source device for emitting light of at least three colors, comprising a first light source module for emitting red light, wherein the first light source module comprises an excitation light source for irradiating excitation light and And a phosphor substrate including a phosphor layer for converting a wavelength of the excitation light to emit red light.

Description

TECHNICAL FIELD [0001] The present invention relates to a light source device and an image projection device including the light source device.

The present invention relates to a light source apparatus and an image projection apparatus including the same.

As the information age rapidly develops, the importance of a display device that realizes a large screen is emphasized. As an example of a device for realizing such a large screen, there is a projector having a function of enlarging and projecting an image.

Such a projector is becoming increasingly smaller and lighter in weight, and currently, miniature projectors such as a mini projector and a pico projector are being researched and developed.

In such a trend, the optical system of the conventional projector uses a red LED, a green LED, and a blue LED as light sources.

1 is a view showing an optical system of an image projecting apparatus including a conventional light source apparatus, specifically showing an optical system of an image projecting apparatus using a reflective display.

1, the conventional image projection apparatus 1 includes a red light source 11 (which may be a red LED), a green light source (which may be a green LED, for example) 12 And a blue light source (which may be a blue LED, for example) are all used.

However, when the red LED is used as the light source, the following problems may occur.

2A is a graph showing the thermal characteristics of a red LED, wherein an X axis indicates a junction temperature (Tj), and a Y axis indicates a light amount based on 25 deg.

As shown in FIG. 2A, since the amount of light is fixed by the junction temperature of the LED, the junction temperature of the LED must be maintained at 45 ° C or lower in order to maintain the light amount of the red LED at 80% or more based on 25 ° C.

Therefore, since the red LED needs to be cooled well, a large-capacity cooling apparatus is required for the image projection apparatus to satisfy such a cooling condition, and accordingly, a large-capacity fan is required.

In the case of the conventional image projection apparatus 1, there is a limit to the downsizing and lightening of the image projection apparatus, and vibration and noise are inevitably generated due to driving of the large-capacity fan.

Therefore, there is a need for a technique for effectively solving such a problem.

An object of the present invention is to provide a light source device capable of securing a maximum amount of light even in an environment using a low-capacity cooling device, and an image projection device including the same.

The present invention provides a light source device for emitting light of at least three colors, comprising a first light source module for emitting red light, wherein the first light source module comprises an excitation light source for irradiating excitation light and And a phosphor substrate including a phosphor layer for converting a wavelength of the excitation light to emit red light.

According to an embodiment, the light source device may further include a second light source module for emitting green light and a third light source module for emitting blue light.

According to one embodiment, the light source device may further include a driving unit for causing the phosphor substrate to oscillate back and forth in one direction.

According to one embodiment, the phosphor substrate may have a plate shape having a long polygonal shape or an elliptical shape in the vibration direction by the driving unit.

According to one embodiment, the incident surface of the phosphor layer with respect to the excitation light may be a non-planar surface.

According to one embodiment, the phosphor substrate further includes a transparent substrate arranged in a direction in which the excitation light is incident on the phosphor layer and transmitting the excitation light, wherein the excitation light transmits through the transparent substrate, Plane may be a non-planar surface.

According to one embodiment, the non-planar vertical cross-section may be a '∩' shape, a '

Figure 112015109010382-pat00001
'Shape,' ∪ 'shape,' ∨ 'shape, and'
Figure 112015109010382-pat00002
Shaped " shape. ≪ / RTI >

The present invention also provides an image projection apparatus including the light source device and an image conversion device that forms an image using light incident from the light source device.

According to one embodiment, the image converting apparatus may use any one of a reflective display panel, a transmissive display panel, and a DLP (Digital Light Processor) display panel.

According to the present invention, it is possible to stabilize the thermal characteristics of the LED, especially the red LED, even at a high temperature, so that the maximum amount of light can be ensured even in an environment using a low-capacity cooling device.

Further, according to the present invention, since the phosphor substrate rotates or linearly moves by the driving unit, the reliability of the phosphor substrate can be ensured even in the optical system of a small space.

Further, by reducing the energy of the excitation light incident on the phosphor layer of the phosphor substrate per unit area, the reliability of the phosphor substrate can be secured.

1 is a view showing an optical system of an image projection apparatus including a conventional light source apparatus.
2A is a graph showing the thermal characteristics of a red LED.
2B is a graph showing the thermal characteristics of the green LED.
2C is a graph showing the thermal characteristics of the blue LED.
3 is a graph showing the thermal characteristics of a blue ELD.
4 is a view illustrating an optical system of an image projection apparatus including a light source device according to an embodiment of the present invention.
5 is a conceptual diagram of a part of a light source device according to an embodiment of the present invention.
6A and 6B are diagrams illustrating driving examples of a phosphor substrate according to an embodiment of the present invention.
7 is a vertical cross-sectional view of a conventional phosphor substrate and a phosphor substrate according to an embodiment of the present invention.
8A to 8C are vertical cross-sectional views of a phosphor substrate according to an embodiment of the present invention.
9 is a conceptual diagram of a phosphor layer composition according to an embodiment of the present invention.
10A to 10C are vertical cross-sectional views of a phosphor substrate without a transparent substrate according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals are used to designate identical or similar elements, and redundant description thereof will be omitted. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role. In the following description of the embodiments of the present invention, a detailed description of related arts will be omitted when it is determined that the gist of the embodiments disclosed herein may be blurred. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. , ≪ / RTI > equivalents, and alternatives.

Terms including ordinals, such as first, second, etc., may be used to describe various elements, but the elements are not limited to these terms.

The terms are used only for the purpose of distinguishing one component from another.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The singular expressions include plural expressions unless the context clearly dictates otherwise.

In this specification, the terms "comprises" or "having ", and the like, are intended to specify the presence of stated features, integers, steps, operations, elements, parts, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

1st Example

4 is a view illustrating an optical system of an image projection apparatus including a light source device according to an embodiment of the present invention.

4, an image projection apparatus 100 according to an exemplary embodiment of the present invention includes a light source unit 110, 120, and 130, and includes a color combination unit 200, an illumination system 300, And a projection lens unit 400 may be included.

However, it is needless to say that the components shown in FIG. 4 are not essential, so that an image projection apparatus having more or fewer components can be implemented.

Hereinafter, each component will be described.

The light source devices 110, 120, and 130 may include at least one light source capable of outputting light of different wavelengths. The light source may be a light emitting diode (LED), but not limited thereto, a laser, a laser diode (LD), an organic light emitting diode (OLED), a non-solid light source, an ultra high pressure (UHP) Lamp. At this time, the light source devices 110, 120, and 130 may further include at least one condenser lens for collecting light from at least one light source.

The light source devices 110, 120 and 130 include a first light source module 110 for emitting red light, a second light source module 120 for emitting green light, and a third light source module 130 for emitting blue light can do.

The first light source module 110 may include an excitation light source 111 and a phosphor substrate 112 to emit excitation light to solve the above-described conventional problems.

The excitation light source 111 may be a UV light source, a blue light emitting diode (LED), a laser diode (LD), or the like using an InGaN-based material. According to one embodiment, the excitation light source 111 is preferably a blue laser diode.

The thermal characteristics of the blue laser diode (or blue ELD) are such that as the temperature Tc increases, the blue laser diode generates a current for applying the same light amount Po to the blue laser diode (If) is changed, it is not impossible to reach the maximum amount of light output by the blue laser diode.

The phosphor substrate 112 may include a phosphor layer 112a that converts the wavelength of the excitation light to emit red light to convert the wavelength of the light incident from the excitation light source 111 into visible light.

The phosphor layer 112a may be a layer formed by applying a fluorescent material to at least a part of a region of a transparent substrate or may be a layer having a predetermined shape by curing a powder type phosphor mixed with an organic binder such as silicon Reference).

In this case, the phosphor layer 112a is for converting the excitation light into the red visible light. The phosphor layer 112a is composed of (Ca, Sr, Ba) 2Si5 (N, (Ca, Sr) S: Eu, (La, Y) 2 O 2 S: Eu, K 2 SiF 6 : Mn, CaAlSiN: Eu can be used.

5, since the first light source module 110 emits red light by using the blue laser diode and the phosphor substrate 112, the thermal characteristics of the light source are stabilized even at a high temperature Thus, even when a low-capacity cooling device is used, the maximum light amount of the light source can be ensured when applied to an image projection apparatus.

At least one of the second light source module 120 and the third light source module 130 may convert the excitation light source and the wavelength of the excitation light into green or blue visible light and emit the visible light as in the first light source module 110 The second light source module 120 and the third light source module 130 may each include a light source such as a light emitting diode (LED) that emits green and blue visible light.

This is because, as shown in Figs. 2B and 2C, the green LED and the blue LED are stable even at a high temperature.

2B and 2C are graphs showing the thermal characteristics of the green LED and blue LED, respectively. As shown in FIGS. 2B and 2C, unlike the red LED (see FIG. 2A), the green LED and the blue LED have a junction temperature of 120? Even the LED 25? The reference light quantity is maintained at 90% or more.

Therefore, it is preferable that the second light source module 120 and the third light source module 130 have no additional configuration like the phosphor substrate 112 like the first light source module 110.

The color combining unit 200 is disposed between the light source apparatuses 110, 120, and 130 and the illumination system 300 including the image converting apparatus, so as to combine at least two colors, Can be combined and transmitted to the image conversion apparatus.

That is, the color combining unit 200 may be colored light or white light having two or more different colors combined, and the light irradiated by the plurality of light source modules may be cross-output light according to time. At this time, it is needless to say that the light output by the color combining unit 200 is not limited to visible light, but may be infrared light or ultraviolet light.

The illumination system 300 may include an image conversion device and may be configured to form an image using light incident from the light source devices 110, 120, and 130. At this time, the image conversion device can perform color conversion or color separation on the light incident from the light source devices 110, 120 and 130, for example, and convert the light into an image using the display device.

The image converting apparatus can use various methods for giving images to light. For example, the image converting apparatus can use any one of a reflective display panel (e.g., LCOS), a transmissive display panel (e.g., HTPS-LCD), and a DLP have.

Hereinafter, it will be described based on the case where the illumination system 300 uses the reflective display panel 350, but the scope of the present invention is not intended to be limited thereto.

The illumination system 300 includes a fly's eye array (FEA) that optically homogenizes the light emitted from the color combination unit 200 to improve illumination and color uniformity with respect to light emitted from the color combination unit 200, : Fly's Eye Array 310). The fly eye array may be a square in which a plurality of convex micro lenses are arrayed. A fly eye array in which a plurality of micro lenses are arranged may include an objective array arranged in the order in which light from the light source is incident, array and a field array.

When the reflective display panel 350 is used in the image conversion apparatus, the illumination system 300 is provided with a polarizing plate 300 for reducing light loss on one side (specifically, the display panel side) of the fly's eye array 310, The conversion device 320 may further be included. The polarized light conversion apparatus may be constituted by a polarizing beam splitter array (PBSA) comprising a plurality of polarizing beam splitters arranged in parallel, and the polarizing beam splitter array includes a polarizing separation film and a retardation plate (1/2?) . Each polarization splitting film of the polarizing beam splitter array may pass, for example, P polarized light among the light from the fly's eye lens 310 and change the S polarized light to 90 degrees. The S-polarized light whose optical path has been changed is reflected by the adjacent polarization splitting film and is output as it is, and the P-polarized light transmitted through the polarization splitting film is converted into S-polarized light by the phase difference plate provided on the front side (light output side) That is, according to one example, the light from the fly's eye lens 310 can be polarized into S polarized light.

Accordingly, the illumination system 300 transmits the light emitted from the polarizing beam splitter array to the reflective display panel 350, enters the light having the image formed by the reflective display panel 350, 400, as shown in FIG.

On the other hand, the DMD of the reflective display panel does not use polarized light, so that the polarization beam splitter array is not used, and may include only a fly's eye array. The beam splitter cube 360 may be replaced with a total internal reflection prism that separates the path of the beam according to the angle.

The projection lens unit 400 can enlarge and project the image input from the polarization beam splitter cube 360, such as an external screen, to the illumination system 300 in detail.

As described above, the present embodiment is based on the case where the illumination system 300 uses an image conversion apparatus using a reflective display panel, but the scope of the present invention is not limited to this, and the transmissive display panel, The present invention can be applied to a light source device using different colors as a light source and an image projection device including the same.

Second Example

As described above, the first light source module 110 according to an exemplary embodiment of the present invention may include an excitation light source 111 and a phosphor substrate 112.

At this time, the phosphor substrate 112 may be fixedly disposed on the front surface of the excitation light source 111 to excite light from the excitation light source 111 according to an embodiment. In order to minimize the space, the weight or the power required by providing the driving unit in the image projection apparatus 1, a driving unit (not shown) is required to drive the phosphor substrate 112, (112) may be fixedly disposed on the front surface of the excitation light source (111).

On the other hand, in the case of the phosphor substrate 112 including the red phosphor layer 112a, the light efficiency is about 70%, and the remaining 30% of the blue laser diode is absorbed or transmitted.

At this time, the absorbed blue laser diode light can increase the temperature of the phosphor layer, which may cause reliability problems with the phosphor substrate 112.

Therefore, in the phosphor layer formed in at least a part of the region of the phosphor substrate 112, the region from which the light from the excitation light source 111 (for example, blue laser diode) (Not shown) drives the phosphor substrate 112 so that the phosphor substrate 112 can be changed.

6A, a driving unit including a driving device such as a motor can rotate the phosphor substrate 112 in at least one direction about one rotation axis R. [

Accordingly, reliability problems that may occur in the phosphor substrate 112 by the excitation light source 111 can be solved.

6A, in order for the phosphor substrate 112 to rotate about one rotation axis R, the phosphor substrate 112 is attached to the first light source module 110 or the image projection apparatus 100 including the first light source module 110, A space for rotatable is required.

6B, the driving unit may include a first light source module 110 or an image projection device (e.g., a light source) including the first light source module 110, 100).

At this time, the phosphor substrate 112 is more preferably a plate type having a polygonal shape or an elliptical shape, which is longer in the vibration direction by the driving portion than the disk type, in view of minimizing the space occupied by the driven phosphor substrate.

As described above, according to the present embodiment, the phosphor substrate may be fixed according to the conditions and specifications required for the image projection apparatus 100, and in order to ensure the reliability of the phosphor substrate in the optical system with a small space, You can also exercise or straighten.

Third Example

As described above, the first light source module 110 according to an exemplary embodiment of the present invention may include an excitation light source 111 and a phosphor substrate 112.

As described above, according to the embodiment of the present invention, the light efficiency of the phosphor substrate 112 including the red phosphor layer is about 70%, and the light of the remaining 30% blue laser diode is absorbed or transmitted. At this time, the absorbed blue laser diode light can increase the temperature of the phosphor layer, which causes a reliability problem with respect to the phosphor substrate 112.

In order to solve such a problem, in the above-described embodiment, the driving unit is used to measure the unit area per unit area of the phosphor layer The energy of excitation light received per hour is divided in time to reduce energy.

Alternatively, in this embodiment, the incident surface of the phosphor layer to the excitation light or the outgoing surface of the transparent substrate facing the phosphor layer is a non-planar surface, and the surface area of the phosphor layer with respect to the excitation light By reducing the energy of the excitation light incident on a unit area, the energy change efficiency of the phosphor layer can be increased, and reliability of the phosphor substrate 112 can be ensured. The smaller the energy of the excitation light per unit area is, the more energy conversion efficiency of the phosphor layer is increased.

Here, the transparent substrate 112b is a substrate disposed in the direction in which the excitation light enters the phosphor layer 112a. As described above, the phosphor layer 112a is formed on the transparent substrate 112b by being formed .

The transparent substrate 112b is a material that can transmit the excitation light from the excitation light source 111, and fused silica, quartz glass, or the like can be used so as to be transparent to ultraviolet light.

Accordingly, the phosphor substrate 112 may further include a visible light reflection film (not shown) on the surface of the transparent substrate 112b on the side of the excitation light source 111. The visible light reflective film may be a band-pass filter composed of a cold mirror or a dielectric multilayer film that reflects visible light.

The surface of the transparent substrate 112b on the side of the phosphor layer 112a or the interface between the phosphor layer 112a and the transparent substrate 112b is in contact with the surface on which the excitation light is incident on the phosphor layer 112a, 8a to 8c, the non-planar surface may have a vertical cross section of '∩', '∧', '

Figure 112015109010382-pat00003
'Shape,' ∪ 'shape,' ∨ 'shape, and'
Figure 112015109010382-pat00004
Quot; shaped " shape. ≪ / RTI >

Meanwhile, as described above, the phosphor layer 112a may have a predetermined shape by curing the powder-type phosphor mixed with an organic binder such as silicon, glass, ceramics, etc. In this case, the transparent substrate 112b It is not a required configuration.

Accordingly, one surface of the phosphor layer 112a may be non-planar. For example, as shown in FIGS. 10A to 10, the vertical cross section may be a shape of '∩', '

Figure 112015109010382-pat00005
'Shape,' ∪ 'shape,' ∨ 'shape, and'
Figure 112015109010382-pat00006
Shaped " shape. ≪ / RTI >

As described above, according to this embodiment, there is an effect that the reliability of the phosphor substrate can be secured by reducing the energy incident on the unit area of the excitation light incident on the phosphor layer.

The preferred embodiments of the present invention have been described in detail with reference to the drawings. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims.

Accordingly, the scope of the present invention is defined by the appended claims rather than the foregoing detailed description, and all changes or modifications derived from the meaning, range, and equivalence of the claims are included in the scope of the present invention Should be interpreted.

1: image projection device 110, 120, 130: light source device
110: first light source module 111: excitation light source
112: phosphor substrate 112a: phosphor layer
112b: transparent substrate 120: second light source module
130: third light source module 200: color combining unit
300: Illumination system 310: fly eye array
320: polarized light conversion device 350: reflective type display panel
360: polarization beam splitter cube 400: projection lens unit

Claims (10)

delete delete delete A light source device for emitting light of at least three colors,
A first light source module for emitting red light;
≪ / RTI >
The first light source module includes:
An excitation light source for irradiating an excitation light; And
A phosphor substrate including a phosphor layer for converting a wavelength of the excitation light to emit red light;
/ RTI >
The light source device includes:
A second light source module for emitting green light; And
A third light source module for emitting blue light;
Further comprising:
The light source device includes:
A driving unit for causing the phosphor substrate to oscillate back and forth in one direction;
Further comprising:
In the phosphor substrate,
Wherein the light source device is a plate type having a long polygonal or elliptical shape in the vibration direction by the driving part. 5. The method of claim 4,
The phosphor layer is formed,
A powder-type phosphor mixed in an organic binder is cured to have a certain shape,
Wherein an incident surface of the phosphor layer with respect to the excitation light is a non-planar surface. 5. The method of claim 4,
In the phosphor substrate,
A transparent substrate arranged in a direction in which the excitation light is incident on the phosphor layer and transmitting the excitation light;
, ≪ / RTI >
Wherein a plane through which the excitation light passes through the transparent substrate is a non-planar surface. 6. The method of claim 5,
The non-planar vertical cross-
'∩' shape, '∧' shape, '
Figure 112017034617812-pat00007
'Shape,' ∪ 'shape,' ∨ 'shape, and'
Figure 112017034617812-pat00008
And a shape that is bent in at least one of the shape of the light source unit. The method according to claim 6,
The non-planar vertical cross-
'∩' shape, '∧' shape, '
Figure 112017034617812-pat00026
'Shape,' ∪ 'shape,' ∨ 'shape, and'
Figure 112017034617812-pat00027
And a shape that is bent in at least one of the shape of the light source unit. 9. A light source apparatus according to at least one of claims 4 to 8; And
An image converting device for forming an image using light incident from the light source device;
And an image projection device. 10. The method of claim 9,
Wherein the image conversion apparatus comprises:
A reflection type display panel, a transmissive display panel, and a DLP (Digital Light Processor) display panel.





KR1020150156916A 2015-11-09 2015-11-09 Light source device and projector comprising the same KR101804123B1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004325874A (en) 2003-04-25 2004-11-18 Seiko Epson Corp Projection type display device
JP2011215531A (en) * 2010-04-02 2011-10-27 Seiko Epson Corp Projector
US20130286360A1 (en) 2012-04-25 2013-10-31 Seiko Epson Corporation Projector

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004325874A (en) 2003-04-25 2004-11-18 Seiko Epson Corp Projection type display device
JP2011215531A (en) * 2010-04-02 2011-10-27 Seiko Epson Corp Projector
US20130286360A1 (en) 2012-04-25 2013-10-31 Seiko Epson Corporation Projector

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