CN107608166A - Light supply apparatus and projection type image display apparatus - Google Patents
Light supply apparatus and projection type image display apparatus Download PDFInfo
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- CN107608166A CN107608166A CN201710519311.2A CN201710519311A CN107608166A CN 107608166 A CN107608166 A CN 107608166A CN 201710519311 A CN201710519311 A CN 201710519311A CN 107608166 A CN107608166 A CN 107608166A
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- light
- polarizer
- supply apparatus
- plate
- polarization
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- 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
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2073—Polarisers in the lamp house
-
- 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
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2066—Reflectors in illumination beam
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Projection Apparatus (AREA)
- Liquid Crystal (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Transforming Electric Information Into Light Information (AREA)
Abstract
A kind of light supply apparatus and projection type image display apparatus are provided, light supply apparatus utilizes the polarization characteristic of the light projected from solid light source and used the inexpensive polarizer of excellent in te pins of durability, and projection type image display apparatus has used the light supply apparatus.In light supply apparatus (40), from semiconductor laser (21) project P polarization blue light through collector lens (23), lens (26), lens (27), the 1st diffuser plate (28) and incide dichronic mirror (29).Dichronic mirror (29) makes the part transmission of the blue light of P polarization, and reflects remaining light.Passed through the blue light of dichronic mirror (29) turns into converging light by collector lens (36) optically focused, and incides reflecting plate (39) through quarter-wave plate (38).Through quarter-wave plate (38) and incided collector lens (36) as the blue light of diverging light by baffle reflection and be transformed to directional light.
Description
Technical field
The present invention relates to being irradiated with illumination light to the image formed on small-sized bulb, shielded by projection lens
The projection type image display apparatus of enlarging projection is carried out on curtain.
Background technology
Shown as the porjection type of bulb of the DMD (DMD) of mirror deflection type, liquid crystal panel has been used
The light source of device, disclose many semiconductor lasers for having used the long-life, light emitting diode solid light source light source dress
Put.Wherein, Patent Document 1 discloses a kind of light supply apparatus, the light supply apparatus is small-sized, and is projected using from solid light source
Light polarization characteristic, the light from solid light source is efficiently subjected to optically focused.
In addition, Patent Document 2 discloses a kind of small-sized and efficient light supply apparatus, the light supply apparatus has used two points
One of wave plate, half wave plate convert the light from fixed light source polaried orientation, the P-polarization component of dichronic mirror will be incided
It is certain ratio with S-polarization component control.
Citation
Patent document
Patent document 1：TOHKEMY 2012-137744 publications
Patent document 2：TOHKEMY 2014-209184 publications
The content of the invention
The present invention provides a kind of polarization characteristic using the light projected from solid light source and has used excellent in te pins of durability and low
The light supply apparatus of the polarizer of cost and the projection type image display apparatus for having used the light supply apparatus.
The 1st light supply apparatus of the present invention possesses：Solid light source；The optically focused member of optically focused is carried out to the light from solid light source
Part；Linearly polarized light is transformed to the polarizer of circularly polarized light；And reflecting plate, polarizer collective optics and reflecting plate it
Between, configure in the incident position of converging light or diverging light.
In addition, the 2nd light supply apparatus of the present invention possesses：Solid light source；The polaried orientation of the light from solid light source is converted,
By P polarization and the light-operated polarizer for being made as certain ratio of S-polarization component；Divide with polarization is carried out to the light from polarizer
From dichronic mirror, polarizer configured in the incident position of converging light or diverging light between solid light source and dichronic mirror.
Invention effect
It is small-sized so as to form due to the position by the way that polarizer configuration to be formed in light optically focused according to the present invention
And cheap light supply apparatus, therefore long-life, bright and low cost projection type image display apparatus can be realized.
Brief description of the drawings
Fig. 1 is the structure chart of the light supply apparatus in embodiments of the present invention 1.
Fig. 2 is the figure for the dichroism for representing the dichronic mirror in embodiment 1.
Fig. 3 is the figure of the interdependent characteristic of angle for the polarized light transmission rate for representing polarizer.
Fig. 4 is the structure chart of the light supply apparatus in embodiments of the present invention 2.
Fig. 5 is the figure for the dichroism for representing the dichronic mirror in embodiment 2.
Fig. 6 is the structure chart of the projection type image display apparatus in embodiments of the present invention 3.
Fig. 7 is the structure chart of the projection type image display apparatus in embodiments of the present invention 4.
Symbol description
21st, 51 semiconductor laser
22nd, 52 heat sink
23rd, 53 collector lens
24th, 54 fin
25th, 55 light beam
26th, 27 lens
28th, 60 the 1st diffuser plate
29th, 61 dichronic mirror
30th, 31,36,56,59,62,63,68 collector lens
32nd, 64 luminescent coating
33rd, 65 aluminium base
34th, 66 motor
35th, 67 fluorescent plate
37th, 69 the 2nd diffuser plate
38 quarter-wave plates
39th, 71 reflecting plate
40th, 72 light supply apparatus
57 speculums
58 half wave plates
70 quarter-wave plates
80th, 90 projection type image display apparatus
100 collector lenses
101 rods
102nd, 209,210 relay lens
103rd, 206,207,208 speculum
104th, 211,212,213 field lens
105 total reflection prisms
106 air layers
107 color prisms
108th, 204 blue reflecting dichroic mirror
109 red reflex dichronic mirrors
110、111、112 DMD
113rd, 224 projection lens
200 the 1st lens array plates
201 the 2nd lens array plates
202 polarization conversion devices
203 overlapping use lens
205 green reflecting dichroic mirrors
214th, 215,216 light incident side polarization plate
217th, 218,219 liquid crystal panel
220th, 221,222 emitting side polarization plate
223 color synthetic prisms
Embodiment
Hereinafter, suitably referring to the drawings, embodiment is described in detail.But omission be present and be excessively described in detail
Situation.For example, presence is omitted for having been well known the detailed description of item, the repetition of substantially the same structure is said
Bright situation.This be in order to avoid following explanation becomes excessively tediously long, make skilled addressee readily understands that.
In addition, accompanying drawing and following explanation are in order to which those skilled in the art fully understand the present invention and provide, purport
The theme described in claims be not defined by these contents.
(embodiment 1)
Fig. 1 is the structure chart of the light supply apparatus involved by embodiments of the present invention 1.The light supply apparatus 40 of embodiment 1
Including：As the semiconductor laser 21 of solid light source, heat sink 22, collector lens 23, fin 24, lens 26, lens 27,
1st diffuser plate 28, dichronic mirror 29, the collector lens 30 as the 1st collective optics, 31, by foring reflectance coating and fluorophor
Fluorescent plate 35, the collector lens 36 as the 2nd collective optics, the 2nd diffuser plate that the aluminium base 33 and motor 34 of layer 32 are formed
37th, the quarter-wave plate 38 and reflecting plate 39 as polarizer.It is each figure 1 illustrates being projected from solid light source
The pattern of light beam 25 and the polarization direction of light that is incident to dichronic mirror 29 and projecting.
To be square be configured with 24 (6 × 4) semiconductor laser 21 and collector lens 23 with fixed intervals two-dimensionally
Configuration is on heat sink.Fin 24 is used to cool down semiconductor laser 21.Semiconductor laser 21 sends with 447nm~
The blue light of 462nm wavelength width, and project linearly polarized light.Each semiconductor laser is configured to from semiconductor laser 21
The polarised light of injection turns into P polarization light relative to the plane of incidence of dichronic mirror 29.
The light projected from multiple semiconductor lasers 21 by optically focused and is transformed to put down by corresponding collector lens 23 respectively
Capable light beam 25.Light beam 25 groups, further by path, incides the 1st expansion by the lens 26 on convex surface and the lens 27 of concave surface
Fall apart 28.1st diffuser plate 28 is glass system, spreads light by the fine concaveconvex shape on surface.As diffusion light
As low as about 3 degree of the diffusion angle of the half value angular breadth of the 50% of maximum intensity, keep polarization characteristic.Penetrated from the 1st diffuser plate 28
The light gone out incides dichronic mirror 29.
The dichroism of dichronic mirror is shown in Fig. 2.Dichroism shows the transmissivity relative to wavelength.Point of dichronic mirror
Light characteristic is that the P polarization for the semiconductor laser for making 447~462nm of wavelength is (average through (average 18%), reflection with certain ratio
82%) and S-polarization is made with the characteristic of more than 95% high reflectance reflection.And then the P polarization of green light and red light, S are inclined
Shake is with the characteristic of more than 96% high-transmission rate transmission.
The blue light of 82% P polarization reflected by dichronic mirror 29 carries out optically focused by collector lens 30,31, if by luminous intensity
Spot diameter is defined as 13.5% diameter relative to peak strength, then overlapping is that spot diameter is 1.5mm~2.5mm
Point light, and incide fluorescent plate 35.1st diffuser plate 28 makes light diffusion so that the diameter of the light turns into desired diameter.
Fluorescent plate 35 is that possess the aluminium base 33 that forms reflectance coating and luminescent coating 32 and in the electronic of central portion
The circular substrate that can control rotation of machine 34.The reflectance coating of fluorescent plate 35 is the metal film or dielectric for reflecting visible ray
Film, formed on aluminium base.And then luminescent coating 32 is formed on the reflecting film.Form to be entered by blue light in luminescent coating 32
Row energization and launch comprising green, red component sodium yellow Ce activation YAG class yellow fluorophors.The crystal of the fluorophor is female
The representational chemistry tissue of body is Y3Al5O12.Luminescent coating 32 is formed as circular.Sent out by the luminescent coating 32 of a light stimulus
Penetrate the sodium yellow of the light comprising green, red component.Fluorescent plate 35 is aluminium base, and by making its rotation, so as to press down
The temperature of luminescent coating 32 caused by excitation light processed rises, and can stably maintain fluorescence conversion efficiency.
The light for inciding luminescent coating 32 carries out fluorescence radiation to the coloured light of green, red component, is projected from fluorescent plate 35.
In addition, the light launched to reflectance coating side is reflected by reflectance coating, projected from fluorescent plate 35.From fluorescent plate 35 project green light and
Red light turns into natural light (non-polarized light), carries out optically focused by collector lens 30,31 again, and after being transformed to almost parallel light,
Through dichronic mirror 29.
On the other hand, the blue light through 18% P polarization of dichronic mirror 29 incides the optically focused as the 2nd collective optics
Lens 36, turned into converging light by optically focused.The focal length of collector lens 36 is set to optically focused angle as less than 40 degree, is reflecting
Focal point is formed near plate 39.2nd diffuser plate 37 is incided by the converging light of the optically focused of collector lens 36.2nd diffuser plate 37 makes
Incident light is diffused, and homogenizes light intensity distributions, and eliminate the speckle of laser.Glass of 2nd diffuser plate 37 in thin plate
Glass surface forms diffusingsurface by fine concaveconvex shape.2nd diffuser plate 37 is following diffuser plate, i.e. at 1 time of diffusingsurface
Transmitted light there are the diffusion angles of substantially 4 degree, and maintain polarization characteristic.The light for having passed through the 2nd diffuser plate 37 incides conduct
The quarter-wave plate 38 of polarizer.Quarter-wave plate 38 is the phase near the centre of luminescence wavelength of semiconductor laser 21
Potential difference turns into the polarizer of 1/4 wavelength.
In the case where the P polarization direction in Fig. 1 is set into 0 degree, quarter-wave plate 38 configures optical axis at 45 degree.Four
/ mono- wave plate 38 is the birefringent film phase difference plate that make use of the oblique evaporation based on dielectric substance (with reference to TOHKEMY
2012-242449 publications).Film phase difference plate is made up of inorganic material, the inorganic optical crystal such as durability, reliability and crystal
It is same excellent.In addition, film wavelength plate to be formed due to being laminated with sufficiently thin thickness compared with the wavelength of light, thus as oblique
Integrally there is the polarizer of an optical axis to evaporation layer.Therefore, phase difference is inorganic relative to the change of incidence angle and crystal etc.
The polarizer of optical crystal is compared, very small.
The angle of film phase difference plate (solid line) and the polarized light transmission rate in crystal polarizer (dotted line) is shown in Fig. 3
One of dependence.Linearly polarized light will be made to incide polarizer and be transformed to a linearly polarized light component after circularly polarized light
Transmissivity as polarized light transmission rate, show the polarized light transmission rate relative to incidence angle.By the situation that incidence angle is 0 degree
Under polarized light transmission rate be set to 1.0 to be standardized.Film phase difference plate is in the case where incidence angle is ± 30 degree of scope
Polarized light transmission rate declines 6%, in contrast, polarized light transmission of the crystal polarizer in the case where incidence angle is ± 5 degree of scope
Rate declines 12%.Because film phase difference plate is the very small polarizer of incident angle dependency, even if configuration is being assembled
Light or the position of diverging light incidence, also the linearly polarized light of incidence can be efficiently transformed to circularly polarized light.Further, since configuration
In the incident position of converging light or diverging light, therefore compared with situation of the conventional configuration in the incident position of directional light, four/
The size of one wave plate 38 small-sized can turn to less than 1/2 size, and cost can be greatly reduced in quarter-wave plate.
Through quarter-wave plate 38 and be transformed to circularly polarized light light by foring the anti-of aluminium or multilayer dielectric film etc.
Penetrating the reflecting plate 39 of film makes phasing back, turns into diverging light as reverse circularly polarized light, becomes through quarter-wave plate 38
It is changed to S-polarization light.And then the component of polarised light is upset due between quarter-wave plate 38 and reflecting plate 39, not configuring, because
This efficiently can be transformed to S-polarization light from P polarization light.
After S-polarization light after being converted by quarter-wave plate 38 is diffused by the 2nd diffuser plate 37 again, by collector lens
36 are transformed to directional light, and are reflected by dichronic mirror 29.
So, the fluorescence light from fluorescent plate 35 and efficiently carry out polarisation transformation after blue light carried out by dichronic mirror 29
Synthesis, is projected as white light.Green, the sodium yellow of red component and semiconductor laser 21 are included by fluorescence radiation
Blue light, so as to obtain the characteristics of luminescence of good white balance.Even if the luminosity spectral characteristic is shown by porjection type
The optical system of device is separated into 3 blue, green, red primitive color lights, can also obtain the monochromatic light of desired chromaticity coordinate.
Be illustrated for quarter-wave plate using film phase difference plate, but can also use make use of by with light
The equal following fine periodical configuration of wavelength caused by birefringent microstructure polarizer.Microstructure phase difference
Plate is due to the equal following microstructure of the wavelength with light, thus, polarized light transmission same with the film phase difference plate shown in Fig. 3
The interdependent characteristic of incident angle of rate is small, can configure in the incident position of converging light.
As described above, the light supply apparatus of the present invention is due to being carried out the light from multiple semiconductor lasers by dichronic mirror
Separation, the light by the side isolated is entered into the luminous green light of row energization, red light and by configuring in the incident position of converging light
The small-sized polarizer put carries out the light i.e. blue light of the opposing party after polarisation transformation and efficiently optically focused and is synthesized into white
Coloured light, therefore small-sized, efficient and cheap light supply apparatus can be formed.
(embodiment 2)
Fig. 4 is the structure chart of the light supply apparatus involved by embodiments of the present invention 2.
The light supply apparatus 72 of embodiment 2 includes：Semiconductor laser 51, heat sink 52, collector lens 53, fin
54th, collector lens 56,59, speculum 57, half wave plate 58, the 1st diffuser plate 60, dichronic mirror as the 1st polarizer
61st, the collector lens 62 as the 1st collective optics, 63, fluorescent plate 67, the collector lens the 68, the 2nd as the 2nd collective optics expand
Fall apart 69, quarter-wave plate 70 and reflecting plate 71 as the 2nd polarizer.Show from solid light source and penetrate in figure
The pattern of each light beam 55 gone out and the polarization direction of light that is incident to dichronic mirror 61 and projecting.Fluorescent plate 67 is by foring reflection
The aluminium base 65 and motor 66 of film and luminescent coating 64 are formed.
The identical structure of light supply apparatus 40 with embodiments of the present invention 1 is semiconductor laser 51, heat sink 52, gathered
Optical lens 53, fin 54, the 1st diffuser plate 60, collector lens 62,63, fluorescent plate 67, collector lens 68, the 2nd diffuser plate 69,
Quarter-wave plate 70, reflecting plate 71 as the 2nd polarizer.
To be square be configured with 24 (6 × 4) semiconductor laser 51 and collector lens 53 with fixed intervals two-dimensionally
Configuration is on heat sink 52.Fin 54 is used to cool down semiconductor laser 51.Semiconductor laser 51 sends with 447nm~
The blue light of 462nm wavelength width, and project linearly polarized light.Each semiconductor laser is configured to from semiconductor in Fig. 4
The polarised light that laser 51 projects turns into P polarization in the state of not via polarizer relative to the plane of incidence of dichronic mirror 61
Light.The light projected from multiple semiconductor lasers 51 by optically focused and is transformed to parallel by corresponding collector lens 53 respectively
Light beam 55.Light beam 55 groups carries out optically focused by the collector lens 56 on convex surface, and is reflected by speculum 57.Converging light after reflection
After carrying out optically focused, turn into diverging light and incide the half wave plate 58 as the 1st polarizer.To half wave plate 58
Light incidence angle be less than 40 degree.Half wave plate 58 is the phase near the centre of luminescence wavelength of semiconductor laser 51
Difference turns into the polarizer of 1/2 wavelength.Half wave plate 58, will in the case where the P polarization direction in Fig. 4 is set into 0 degree
Optical axis is configured to 32.5 degree.Half wave plate 58 sets adjustment mechanism to direction of rotation, enabling adjusts matching somebody with somebody for its optical axis
Angle setting degree.
P polarization light from semiconductor laser 51 is transformed to 65 degree so as to polaried orientation by half wave plate 58, P
The luminous intensity of polarized component turns into 18%, and the luminous intensity of S-polarization component turns into 82%.
Half wave plate 58 is the birefringent film phase difference plate that make use of the oblique evaporation based on dielectric substance.
Film phase difference plate is made up of inorganic material, and the inorganic optical crystal such as durability, reliability and crystal is same excellent.It is in addition, thin
Film wavelength plate to be formed due to being laminated with sufficiently thin thickness compared with the wavelength of light, thus phase difference is relative to the incidence angle of light
Change is very small compared with the polarizer of the inorganic optical crystals such as crystal.Therefore, even in configuration in the light assembled or dissipated
In the case of incident position, also rotation transformation efficiently can be carried out to the P polarization orientation from semiconductor laser 51.This
Outside, due to half wave plate 58 is configured in the incident position of converging light, therefore with conventional configuration in directional light incidence
The situation of position is compared, and the size of half wave plate 58 small-sized can turn to less than 1/2, and half wave plate can significantly drop
Low cost.
Almost parallel light is transformed to by collector lens 59 through the light of half wave plate 58, incides the 1st diffuser plate 60,
Spread and incide dichronic mirror 61.
The spectral transmission characteristic of dichronic mirror 61 is shown in Fig. 5.Dichronic mirror 61 has the property that：Transmissivity is 50%
Wavelength is 465nm in S-polarization light and is 442nm in P polarization light, and pass through blue light, reflection and for comprising green
Color, the coloured light of red component pass it through with more than 96%.The S-polarization component for inciding the light of dichronic mirror 61 is reflected, P polarization
Component passes through.Due to the optical axis of half wave plate 58 is configured into 32.5 degree, therefore the polaried orientation of incident light turns into 65 degree,
The luminous intensity of S-polarization component and P-polarization component respectively becomes 82%, 18%.
The light of the S-polarization reflected by dichronic mirror 61 by collector lens 62,63 carry out optically focused, it is overlapping for luminous intensity relative to peak
It is worth intensity and a diameter of 1.5mm~2.5mm as 13.5% point light, and incides fluorescent plate 67.1st diffuser plate 60 makes light
Diffusion is so that the diameter of the light turns into desired diameter.Fluorescent plate 67 is that possess to form reflectance coating and luminescent coating 64
Aluminium base 65 and motor 66 in central portion the circular substrate that can control rotation.The reflectance coating of fluorescent plate 67 is anti-
The metal film or dielectric film of visible ray are penetrated, is formed on aluminium base.And then luminescent coating 64 is formed on the reflecting film.Glimmering
The Ce for being entered row energization by blue light and being launched the sodium yellow comprising green, red component is formd in body of light layer 64 and activates YAG classes
Yellow fluorophor.The representational chemistry tissue of the crystal matrix of the fluorophor is Y3Al5O12.Luminescent coating 64 is formed as annulus
Shape.
Launch the sodium yellow of the light comprising green, red component by the luminescent coating 64 of a light stimulus.Fluorescent plate 67 is aluminium
Substrate, and by making its rotation, rise so as to suppress the temperature of the luminescent coating 64 caused by excitation light, can stablize
Ground maintains fluorescence conversion efficiency.Incide the light of luminescent coating 64 and fluorescence radiation is carried out to the coloured light of green, red component, from glimmering
Tabula rasa 67 projects.In addition, the light launched to reflectance coating side is reflected by reflectance coating, projected from fluorescent plate 67.Projected from fluorescent plate 67
Green light and red light turn into natural light, optically focused is carried out by collector lens 62,63 again, and is transformed to almost parallel light
Afterwards, through dichronic mirror 61.
On the other hand, the blue light through 18% P polarization of dichronic mirror 61 incides the optically focused as the 2nd collective optics
Lens 68, carry out optically focused.The focal length of collector lens 68 is set to optically focused angle as less than 40 degree, near reflecting plate 71
Form focal point.2nd diffuser plate 69 is incided by the converging light of the optically focused of collector lens 68.2nd diffuser plate 69 enters the light of incidence
Row diffusion, homogenizes light intensity distributions, and eliminate the speckle of laser.2nd diffuser plate 69 thin plate glass surface by micro-
Thin concaveconvex shape forms diffusingsurface.2nd diffuser plate 69 is following diffuser plate, i.e. is had in the transmitted light of 1 time of diffusingsurface
There is the diffusion angle of substantially 4 degree, and maintain polarization characteristic.
The light for having passed through the 2nd diffuser plate 69 incides quarter-wave plate 70 as the 2nd polarizer.Quarter-wave
Piece 70 is the polarizer that phase difference turns into 1/4 wavelength near the centre of luminescence wavelength of semiconductor laser 51.By in Fig. 4
P polarization direction be set to 0 degree in the case of, quarter-wave plate 70 by optical axis configure at 45 degree.Quarter-wave plate 70 is profit
With the birefringent film phase difference plate of the oblique evaporation based on dielectric substance.Film phase difference plate is by inorganic material structure
It is same excellent into the inorganic optical crystal such as, durability, reliability and crystal.
Through quarter-wave plate 70 and be transformed to circularly polarized light light by foring the anti-of aluminium or multilayer dielectric film etc.
Penetrating the reflecting plate 71 of film makes phasing back, turns into diverging light as reverse circularly polarized light, becomes through quarter-wave plate 70
It is changed to S-polarization light.And then the component of polarised light is upset due between quarter-wave plate 70 and reflecting plate 71, not configuring, because
This efficiently can be transformed to S-polarization light from P polarization light.
After the S-polarization light converted by quarter-wave plate 70 is diffused by the 2nd diffuser plate 69 again, by collector lens 68
Directional light is transformed to, and is reflected by dichronic mirror 61.
So, the fluorescence light from fluorescent plate 67 and efficiently carry out polarisation transformation after blue light carried out by dichronic mirror 61
Synthesis, is projected as white light.Green, the sodium yellow of red component and semiconductor laser 51 are included by fluorescence radiation
Blue light, so as to obtain the characteristics of luminescence of good white balance.Even if the luminosity spectral characteristic is shown by porjection type
The optical system of device is separated into 3 blue, green, red primitive color lights, can also obtain the monochromatic light of desired chromaticity coordinate.
In embodiments of the present invention 1, the segregation ratio of blue light is special by the transmissivity of the blue wave band of dichronic mirror 29
Property determines, can slightly deviation on segregation ratio.On the other hand, in embodiments of the present invention 2, because use can adjust
The half wave plate 58 of the arrangement angles of whole optical axis controls the segregation ratio of blue light for being passed through, being reflected to dichronic mirror 61
Rate, thus the deviation of segregation ratio is very small.Therefore, the deviation of white balance characteristic becomes very small.
Be illustrated for half wave plate 58 using film phase difference plate, but can also use make use of by with
Birefringent microstructure polarizer caused by the equal following fine periodical configuration of the wavelength of light.
In embodiment 2, half wave plate 58 has been used as the 1st polarizer, but four points can also be used
One of wave plate as the 1st polarizer, it is configured to from semiconductor laser 51 project polarised light turn into S-polarization light, and
The arrangement angles of adjustment optical axis cause the S-polarization component of the blue light after passing through and P-polarization component to turn into requirement ratio.
In addition, in embodiment 2, as shown in figure 4, illustrating to configure half wave plate 58 in diverging light incidence
The structure of opening position, but half wave plate 58 can also be configured in the incident position of converging light.For example, it is also possible to by anti-
Penetrate the nearby place that the converging light after mirror 57 reflects carries out optically focused, configuration half wave plate 58.
As described above, the light supply apparatus of the present invention is due to the light from multiple semiconductor lasers being assembled by configuring
The small-sized half wave plate and dichronic mirror of the incident position of light or diverging light carry out polarization separation with certain ratio, and will be by
The light for the side that polarization separation goes out enters the luminous blue light comprising green, red sodium yellow and the opposing party of row energization efficiently
Carry out optically focused, be synthesized into white light, therefore the light source that the deviation that can form white balance is smaller, small-sized, efficient and cheap
Device.
(embodiment 3)
Fig. 6 is the figure for the structure for representing the 1st projection type image display apparatus involved by embodiments of the present invention 3.As figure
As forming element, use as TN patterns or VA patterns and formd the active matrix mode of thin film transistor (TFT) in pixel region
Transmission-type liquid crystal panel.
Light supply apparatus 40 includes：Semiconductor laser 21, heat sink 22, collector lens 23, fin 24, the lens of blueness
26th, the 27, the 1st diffuser plate 28, dichronic mirror 29, collector lens 30,31, the aluminium base by foring reflectance coating and luminescent coating 32
33 and motor 34 form fluorescent plate 35, collector lens 36, the 2nd diffuser plate 37, quarter-wave plate 38, reflecting plate 39.By
In above is the light supply apparatus 40 of embodiments of the present invention 1, so omit its repeat specification.
The projection type image display apparatus 80 of embodiment 3 also includes：1st lens array plate 200, the 2nd lens array plate 201,
Polarization conversion device 202, it is overlapping with lens 203, blue reflecting dichroic mirror 204, green reflecting dichroic mirror 205, speculum 206,207,
208th, relay lens 209,210, field lens 211,212,213, light incident side polarization plate 214,215,216, liquid crystal panel 217,
218th, 219, emitting side polarization plate 220,221,222, the color that is made up of red reflex dichronic mirror and blue reflecting dichroic mirror synthesize rib
Mirror 223 and projection lens 224.
White light from light supply apparatus 40 incides the 1st lens array plate 200 being made up of multiple lens elements.It is incident
Light beam to the 1st lens array plate 200 is divided into the light beam of many.The many light beams being partitioned into are converged on by multiple lens
The 2nd lens array plate 201 formed.The lens element of 1st lens array plate 200 is similar to liquid crystal panel 217,218,219
The opening shape of shape.The lens element of 2nd lens array plate 201 determines that its focal length causes the 1st lens array plate 200
Turn into substantially conjugate relation with liquid crystal panel 217,218,219.
The light projected from the 2nd lens array plate 201 incides polarization conversion device 202.Polarization conversion device 202 is by polarizing
Separate prism and half wave plate is formed, the natural light from light source is transformed to the light of a polarization direction.Fluorescence light by
Then natural light, so be a polarization direction by polarisation transformation, and blue light is incident with the light of S-polarization, becomes without polarization
Change and projected with S-polarization light.
Light from polarization conversion device 202 incides overlapping lens 203.It is overlapping with lens 203 be used for will be from the 2nd
Lens of the overlapping illumination of light that each lens element of lens array plate 201 projects on liquid crystal panel 217,218,219.By the 1st
The lens array plate 201 of lens array plate 200 and the 2nd, polarization conversion device 202 and overlapping it is set to light optics with lens 203
System.
Carry out self-overlapped and pass through the blue reflecting dichroic mirror 204 for being used as color resolution element, green reflecting dichroic mirror by the use of the light of lens 203
205, and it is separated into blue light, green light, red light.Green light is incident through field lens 211, light incident side polarization plate 214
To liquid crystal panel 217.After blue light is reflected by speculum 206, through field lens 212, light incident side polarization plate 215 and incide
Liquid crystal panel 218.Red light is occurred through refraction and reflection, and thoroughly by relay lens 209,210, speculum 207,208
Field lens 213, light incident side polarization plate 216 are crossed, incides liquid crystal panel 219.
3 pieces of liquid crystal panels 217,218,219 apply alive control to make by corresponding with signal of video signal to pixel
The polarization state of incident light changes, and by being respectively configured as in the both sides of each liquid crystal panel 217,218,219
The combination of the orthogonal light incident side polarization plate 214,215,216 of axle and emitting side polarization plate 220,221,222 is penetrated to adjust
Light processed, form green, blue, red image.Pass through color synthetic prisms through the white light of emitting side polarization plate 220,221,222
223, red, blue white light is reflected by red reflex dichronic mirror, blue reflecting dichroic mirror respectively, is synthesized green light, is incided projection
Lens 224.The light amplification for inciding projection lens 224 is transmitted on screen (not shown).
Light supply apparatus by multiple solid light sources it is small-sized form, and efficiently project the white light of good white balance, because
This can realize the projection type image display apparatus of long-life and high brightness.Further, since used in image formation component using inclined
Shake light and not 3 pieces of liquid crystal panels of time-division system, therefore achromatization fracture can be obtained and color reproduction is good, bright and high-precision
Thin projects images.Further, since compared with having used the situation of 3 DMD elements, it is not necessary to which total reflection prism, color synthesis are used
Prism turn into the small-sized prisms of 45 degree incidence, therefore projection type image display apparatus can be configured to small-sized.
As described above, the 1st projection type image display apparatus of the present invention uses a kind of light supply apparatus, the light supply apparatus can pass through
As the solid light source and dichronic mirror of semiconductor laser, the light of the P polarization from semiconductor laser is pressed into certain intensity ratio
Rate is separated, and by the light by the side isolated enter the luminous sodium yellow comprising green and red component of row energization and
The blue light after polarisation transformation is efficiently carried out by the light of the opposing party of small-sized quarter-wave plate to isolating to close
Into and obtain white light.Therefore, it is possible to form small-sized and cheap projection type image display apparatus.Figure has been used as light supply apparatus
Light supply apparatus 40 shown in 1, but the light supply apparatus 72 shown in Fig. 4 can also be used.In this case, what light supply apparatus projected is white
The deviation of the white balance of coloured light is very small, can form cheap light supply apparatus and projection type image display apparatus.
The liquid crystal panel of transmission-type has been used as image formation component, but the liquid crystal panel of reflection-type can also be used
To form.By using the liquid crystal panel of reflection-type, smaller and fine projection type image display apparatus can be formed.
(embodiment 4)
Fig. 7 is the 2nd projection type image display apparatus involved by embodiments of the present invention 4.2nd projection type image display apparatus 90 makes
Image formation component is used as by the use of 3 DMD.
Light supply apparatus 40 includes：Semiconductor laser 21, heat sink 22, collector lens 23, fin 24, the lens of blueness
26th, the 27, the 1st diffuser plate 28, dichronic mirror 29, collector lens 30,31, the aluminium base by foring reflectance coating and luminescent coating 32
33 and motor 34 form fluorescent plate 35, collector lens 36, the 2nd diffuser plate 37, quarter-wave plate 38 and reflecting plate
39.Above is the light supply apparatus 40 of embodiments of the present invention 1.
The white light projected from light supply apparatus 40 incides collector lens 100, is converged to rod (rod) 101.To rod 101
Incident light makes light intensity distributions homogenize and project by carrying out multiple reflections inside rod.Injection light from rod 101 is in
Optically focused is carried out after lens 102, and after being reflected by speculum 103, through field lens 104, incides total reflection prism 105.Here,
Collector lens 100, rod 101, relay lens 102, speculum 103 and field lens 104 are one of lamp optical system.
Total reflection prism 105 is made up of 2 prisms, and thin air layer 106 is formd in the approaching face of prism each other.Air layer
106 pairs are totally reflected with the incident light of angle more than critical angle.Light from field lens 104 is totally reflected prism 105
Fully reflecting surface reflects, and incides color prism 107.
Color prism 107 is made up of 3 prisms, and blue reflecting dichroic mirror 108 and red is formd in the approaching face of each prism
Reflecting dichroic mirror 109.By the blue reflecting dichroic mirror 108 and red reflex dichronic mirror 109 of color prism 107, so as to be separated into indigo plant
Coloured light, red light, green light, and DMD110,111,112 are incided respectively.DMD110,111,112 make micro- according to signal of video signal
Mirror deflects, and is reflected into the light that is injected into projection lens 113 and the light of effective outer traveling to projection lens 113.By DMD110,
111st, the light after 112 reflections is again passed through color prism 107.Through during color prism 107, separation it is blue, red, green
White light be synthesized, and incide total reflection prism 105.
The light of total reflection prism 105 is incided due to incide air layer 106 below critical angle, therefore transmission and incidence
To projection lens 113.So, the image light formed by DMD110,111,112 is exaggerated and is transmitted on screen (not shown).
Light supply apparatus is made up of multiple solid light sources, and efficiently projects the white light of good white balance, therefore can
Realize the projection type image display apparatus of long-life and high brightness.Further, since DMD has been used in image formation component, therefore with making
Compared with the image formation component of liquid crystal, the high projection type image display apparatus of light resistance, heat resistance can be formed.And then due to
3 DMD have been used, therefore can obtain that color reproduction is good, bright and fine projects images.
As described above, the 2nd projection type image display apparatus of the present invention uses a kind of light supply apparatus, the light supply apparatus can pass through
As the solid light source and dichronic mirror of semiconductor laser, by the light of the P polarization from semiconductor laser with certain intensity ratio
Rate is separated, and by the light by the side isolated enter the luminous sodium yellow comprising green and red component of row energization and
The blue light after polarisation transformation is efficiently carried out by the light of the opposing party of small-sized quarter-wave plate to isolating to close
Into and obtain white light.Therefore, it is possible to form small-sized and cheap projection type image display apparatus.Figure has been used as light supply apparatus
Light supply apparatus 40 shown in 1, but the light supply apparatus 72 shown in Fig. 4 can also be used.In this case, what light supply apparatus projected is white
The deviation of the white balance of coloured light is very small, can form cheap light supply apparatus and projection type image display apparatus.
As described above, the illustration as disclosed technology in this application, embodiment 1~4 is illustrated.But
It is that the technology in the present invention is not limited to this, can also apply to carry out the embodiment party of change, displacement, additional, omission etc.
Formula.
The present invention can be applied to the light supply apparatus for having used the projection type image display apparatus of image formation component.
Claims (16)
1. a kind of light supply apparatus, possesses：
Solid light source；
Collective optics, it carries out optically focused to the light from the solid light source；
Polarizer, linearly polarized light is transformed to circularly polarized light by it；With
Reflecting plate,
The polarizer is configured in the incident position of converging light and diverging light between the collective optics and the reflecting plate
Put.
2. light supply apparatus according to claim 1, the polarizer is quarter-wave plate.
3. a kind of light supply apparatus, possesses：
Solid light source；
Polarizer, it converts the polaried orientation of the light from the solid light source, by the photocontrol of P polarization and S-polarization component
For certain ratio；With
Dichronic mirror, it carries out polarization separation to the light from the polarizer,
The polarizer is configured in the incident position of converging light or diverging light between the solid light source and the dichronic mirror
Put.
4. light supply apparatus according to claim 3, the polarizer is half wave plate or quarter-wave plate.
5. the light supply apparatus according to claim 1 or 3, the polarizer configuration turns into less than 40 degree in incident angle of light
Position.
6. the light supply apparatus according to claim 1 or 3, the polarizer is to have used the birefringence based on oblique evaporation
Film phase difference plate or used the birefringent microstructure polarizer based on microstructure.
7. a kind of light supply apparatus, possesses：
Solid light source；
1st polarizer, it converts the polaried orientation of the light from the solid light source, by the light-operated of P polarization and S-polarization component
It is made as certain ratio；
Dichronic mirror, it carries out polarization separation to the light from the 1st polarizer；
Collective optics, it carries out optically focused to the light from the dichronic mirror；
2nd polarizer, linearly polarized light is transformed to circularly polarized light by it；With
Reflecting plate,
1st polarizer configures incident in converging light or diverging light between the solid light source and the dichronic mirror
Position,
2nd polarizer configures incident in converging light and diverging light between the collective optics and the reflecting plate
Position.
8. light supply apparatus according to claim 7, the 1st polarizer is half wave plate or quarter-wave
Piece.
9. light supply apparatus according to claim 7, the 2nd polarizer is quarter-wave plate.
10. light supply apparatus according to claim 7, in the 1st polarizer and the 2nd polarizer at least
One configuration turns into less than 40 degree of position in incident angle of light.
11. light supply apparatus according to claim 7, in the 1st polarizer and the 2nd polarizer at least
One is to have used birefringent film phase difference plate based on oblique evaporation or used based on the birefringent of microstructure
Microstructure polarizer.
12. according to the light supply apparatus described in claim 1,3 or 7, the solid light source is blue semiconductor laser.
13. according to the light supply apparatus described in claim 1,3 or 7, the just linearly polarized light projected from the solid light source.
14. a kind of projection type image display apparatus, possesses：
Light source；
Lamp optical system, the light from the light source is carried out optically focused and illuminable area is illuminated by it；
Image formation component, it forms image according to signal of video signal；With
Projection lens, it is amplified projection to forming the image that element formed by described image,
The light source is the light supply apparatus described in claim 1,3 or 7.
15. projection type image display apparatus according to claim 14, it is liquid crystal panel that described image, which forms element,.
16. projection type image display apparatus according to claim 14, described image forms the number that element is mirror deflection type
Word micro mirror element is DMD.
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| CN202210543671.7A CN114721213B (en) | 2016-07-12 | 2017-06-29 | Light source device and projection display device |
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| JP2016-137293 | 2016-07-12 | ||
| JP2016137293 | 2016-07-12 | ||
| JP2017-073479 | 2017-04-03 | ||
| JP2017073479A JP6893298B2 (en) | 2016-07-12 | 2017-04-03 | Light source device and projection type display device |
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| CN107608166A true CN107608166A (en) | 2018-01-19 |
| CN107608166B CN107608166B (en) | 2022-08-16 |
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| CN201710519311.2A Active CN107608166B (en) | 2016-07-12 | 2017-06-29 | Light source device and projection display device |
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| JP (3) | JP6893298B2 (en) |
| CN (2) | CN114721213B (en) |
| PH (1) | PH12017000156B1 (en) |
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| CN111624838A (en) * | 2019-02-28 | 2020-09-04 | 中强光电股份有限公司 | Projection system and driving method of projection system |
| WO2020186843A1 (en) * | 2019-03-20 | 2020-09-24 | 青岛海信激光显示股份有限公司 | Laser light source and laser projection apparatus |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2022093391A (en) | 2022-06-23 |
| CN107608166B (en) | 2022-08-16 |
| JP2021120757A (en) | 2021-08-19 |
| PH12017000156A1 (en) | 2018-07-23 |
| JP7312944B2 (en) | 2023-07-24 |
| CN114721213B (en) | 2024-10-25 |
| PH12017000156B1 (en) | 2018-07-23 |
| JP6893298B2 (en) | 2021-06-23 |
| JP2018013764A (en) | 2018-01-25 |
| CN114721213A (en) | 2022-07-08 |
| JP7108828B2 (en) | 2022-07-29 |
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