CN108957921A - Excitating light strength control system and optical projection system - Google Patents
Excitating light strength control system and optical projection system Download PDFInfo
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- CN108957921A CN108957921A CN201710349016.7A CN201710349016A CN108957921A CN 108957921 A CN108957921 A CN 108957921A CN 201710349016 A CN201710349016 A CN 201710349016A CN 108957921 A CN108957921 A CN 108957921A
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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
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2033—LED or laser light sources
- G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
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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
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Abstract
The present invention relates to a kind of excitating light strength control systems, including illumination portion, imaging section and control unit, illumination portion includes light source and light-dividing device, imaging section includes three-chip type optical modulator, three-chip type color conversion element and conjunction color device, the exciting light of the light source outgoing device that is split is divided into after three beams and imports three-chip type optical modulator and be modulated, the pixel of three-chip type color conversion element is excited to generate three color stimulated lights after ovennodulation, it closes color device and three colors is excited a branch of outgoing of photosynthesis, control unit controls the excitating light strength of three-chip type optical modulator outgoing.Using the present invention, optical energy utilization efficiency and image quality can be improved, the present invention also provides a kind of optical projection systems.
Description
Technical field
The present invention relates to field of projection display more particularly to a kind of system with excitating light strength control and application are described sharp
The optical projection system of luminous intensity control system.
Background technique
In current display field, mainly using DMD or LCD as optical modulator, to illumination light be modulated to
Image light is obtained, so problem relatively low as the generally existing efficiency of display equipment of optical modulator using DMD or LCD at present.
Specifically, it is being generated in display equipment of the polychromatic light as light source using LASER Excited Fluorescence material, lasing fluorescence member
The light that part issues reaches fluorescent material through optical element, such as optics, beam shaping device, and efficiency is about 90%, through glimmering
Illumination light is obtained after luminescent material conversion, again is coupled to optical-mechanical system (such as 3DMD optical-mechanical system, 3LCD optical-mechanical system), efficiency is about
94%, it is modulated into image light through optical-mechanical system, efficiency is about 30%~40%, then projected on screen via projection lens,
It can be seen that optical-mechanical system low efficiency, make to show that device efficiency is low accordingly.
Summary of the invention
In view of the above situation, the present invention provides a kind of excitating light strength control system that optical energy utilization efficiency is high and projection system
System.
On the one hand, the present invention provides a kind of excitating light strength control system, including illumination portion, imaging section and control unit, institute
Stating illumination portion includes light source and light-dividing device, the imaging section include three-chip type optical modulator, three-chip type color conversion element with
Color device is closed, the exciting light being emitted from the light source is divided into three beams by the light-dividing device, and the three beams exciting light is imported into institute
It states three-chip type optical modulator to be modulated, the pixel of three-chip type color conversion element described in the excitation through ovennodulation
Point generates three color stimulated lights, and photosynthesis is a branch of, and the control unit is for controlling for three color to be excited for the conjunction color device
The excitating light strength of the three-chip type optical modulator outgoing.
On the other hand, the present invention also provides a kind of optical projection system, the optical projection system includes above-mentioned excitating light strength control
System processed and projection lens, the light beam being emitted from the excitating light strength control system through the projection lens projects to screen,
Color image is presented.
The advantages of optical projection system provided in an embodiment of the present invention, is: in imaging section, using three-chip type optical modulator and three
Chip color conversion element, separately setting conjunction color device is merged into the three beams coloured light that three-chip type color conversion element exports a branch of,
Close color device uses X-type to close color filtering apparatus, three-chip type color conversion element and three-chip type light modulation in some embodiments
Device closes color filtering apparatus three weeks around X-type is set to, and realizes to the seamless spliced of light mixing, makes excitating light strength control system knot
Structure is more compact；In illumination portion, light source outgoing beam is divided by three beams by light-dividing device, and three light beams are directed into three respectively
Chip optical modulator, by the way that light-dividing device is rationally arranged, can reasonable distribution three-beam light splitting ratio, can such as make to enter
The light beam of the optical modulator of corresponding modulating G (green) picture signal is bigger in three-chip type optical modulator, therefore passes through rationally setting point
Light ratio can make light-use reasonable, promote the efficiency of light energy utilization；In control unit, by raw image data and it is coated on three-chip type
The excitating light strength of fluorescent material/scattering material response curve control optical modulator outgoing on color conversion element, is promoted
It is emitted to the image quality of screen.
Detailed description of the invention
Fig. 1 is the system block diagram of the excitating light strength control system in embodiment of the present invention.
Fig. 2 is the specific system architecture diagram of the first embodiment of excitating light strength control system shown in Fig. 1.
Fig. 3 is the specific system architecture diagram of second of embodiment of excitating light strength control system shown in Fig. 1.
Fig. 4 is the specific system architecture diagram of the third embodiment of excitating light strength control system shown in Fig. 1.
Fig. 5 and Fig. 6 is the light splitting schematic diagram of the beam splitter of excitating light strength control system shown in Fig. 4.
Fig. 7 is the schematic diagram of the light-dividing device of the 4th kind of embodiment of excitating light strength control system shown in Fig. 1.
Fig. 8 is exciting light when being blue laser, and red, green, blue fluorescent material/scattering material illustrates the response curve of exciting light
Figure.
Fig. 9 is that exciting light is UV light time, response curve schematic diagram of the red, green, blue fluorescent material to exciting light.
Figure 10 is the method flow diagram that the relation list of image signal value and LCD signal value is obtained by detection mode.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein " and/or " it include one or more relevant institute's lists
Any and all combinations of purpose.
Refering to Figure 1, the box that Fig. 1 is the excitating light strength control system in the first embodiment of the invention shows
It is intended to, the excitating light strength control system 1 can be applied in optical projection system 2.The excitating light strength control system 1 includes
Illumination portion, imaging section and control unit, specifically, in the present embodiment, the illumination portion includes light source 10 and light-dividing device
11, the imaging section includes three-chip type optical modulator 12 and three-chip type color conversion element 13 and Multiplexing apparatus 14, the control
Portion processed includes controller 15.The light source 10 issues exciting light, and the exciting light that light source issues is divided into three by the light-dividing device 11
Beam, the three beams exciting light respectively enter three-chip type optical modulator 12, and the controller 15 receives original image number to be shown
According to according to the excitating light strength being emitted at raw image data adjusting three-chip type optical modulator 12, in the control of the controller 15
Under system, for each frame image, per a piece of optical modulator metering needle to the excitating light strength of respective pixel, via swashing after adjusting
It shines and enters corresponding color translation element, excitation color translation element generates primary colours stimulated light, such as R (red), G (green) or B
(indigo plant) stimulated light, the primary colours stimulated light generated per a piece of color conversion element, which enters, closes color device 14, closes via Multiplexing apparatus 14
Color forms a branch of.In the present embodiment, the excitating light strength control system fills in optical projection system 2 via color is closed
The light beam for setting 14 generations is finally emitted to screen (not shown) through the projection lens 20 of optical projection system 2, so that one frame of output is colored
Image.
It please refers to shown in Fig. 2, is the system architecture of the first embodiment of excitating light strength control system 1 shown in Fig. 1
Figure, in the present embodiment, the light source 10a are emitted using blue laser or ultraviolet (UV) light source, the indigo plant laser or UV light source
Light beam be divided into three-beam through light-dividing device 11a, the three-beam respectively enters three-chip type optical modulator 12.In present embodiment
In, the light-dividing device 11a includes first order light splitting piece 111a and second level light splitting piece 112a, and first order light splitting piece 111a will be from
The blue laser or UV light beam of light source 10a incidence separate two light beams, wherein the first light beams are reflected by first order light splitting piece 111a
Into one first optical channel, the blue light optical modulator 121 of three-chip type optical modulator 12 is entered via the first optical channel.Another light beam
Second level light splitting piece 112a is transmitted by first order light splitting piece 111a, second level light splitting piece 112a continues from incident light beam
Separate two light beams, wherein a branch of be reflected into one second optical channel by second level light splitting piece 112a, via the second optical channel into
Enter the green light optical modulator 122 of three-chip type optical modulator 12, another light beams are transmitted into one by second level light splitting piece 112a
Three optical channels enter the feux rouges optical modulator 123 of three-chip type optical modulator 12 via third optical channel.
The three-chip type optical modulator 12 is 3LCD optical modulator 12a in the present embodiment, wherein blue light optical modulator
121 be blue light transmission type LCD optical modulator, and green light optical modulator 122 is green light transmission formula LCD optical modulator, feux rouges light modulation
Device 123 is red transmission formula LCD optical modulator.Certainly, the 3LCD optical modulator 12a is only citing, in other implementations
In mode, the three-chip type optical modulator 12 is also possible to 3DMD optical modulator or 3LCOS optical modulator.The three-chip type color
Conversion element 13 is made of three-chip type Fluorescence chip 13a in the present embodiment, in the present embodiment, three-chip type Fluorescence chip
13a includes blue Fluorescence chip 131, green fluorescence chip 132 and red Fluorescence chip 133, in the present embodiment, it should be noted that,
Blue, green, the red Fluorescence chip 131,132,133 be on a substrate by coating corresponding color fluorescent material and/or
Scattering material is made in a manner of forming multiple pixels, and multiple blue pixels, Mei Gelan are distributed on the indigo plant Fluorescence chip 131
Pixel is coated with blue phosphor, and multiple green pixel points are distributed on green fluorescence chip 132, and each green pixel point is coated with green fluorescence
Powder is distributed multiple red pixels on all red red Fluorescence chips 133 of pixel, and each red pixel is coated with red fluorescence powder.
Under the exciting light irradiation of 3LCD optical modulator 12a outgoing, the blue pixel on blue Fluorescence chip 131 generates blue and is excited
The red pixel in the green stimulated light of green pixel point generation, red Fluorescence chip 133 on light, green fluorescence chip 132 generates red
Stimulated light.
First optical channel, the second optical channel, third optical channel are respectively that blue and green light and feux rouges leave light-dividing device
The optical path for entering corresponding blue light optical modulator 121, green light optical modulator 122 and feux rouges optical modulator 123 after 11, according to need
It wants, optical device, such as reflective mirror can be set in the optical path, any optical device can also be not provided with.Such as in this implementation
In mode, reflective mirror, not set optical device on the second optical channel are provided on the first optical channel and third optical channel.
In the present embodiment, the first order light splitting piece 111a and incident beam direction are substantially in 45 degree of angles settings, if
The reflective mirror 161 being placed on the first optical channel is substantially arranged in parallel with first order light splitting piece 111a.Second level light splitting piece 112a with
Incident beam direction is substantially in the setting of 45 degree of angles, on third optical channel by light beam by sequencing be equipped with reflective mirror 162 with
163, wherein reflective mirror 162 and second level light splitting piece 112a is arranged substantially in parallel, and reflective mirror 163 is substantially vertical with reflective mirror 162
Setting.Closing color device 14 in the present embodiment is that X-type closes color filtering apparatus 14, closes three side shapes of color filtering apparatus 14 in X-type
Light-emitting window is formed at three light inlets, in the 4th side.Three light inlets positioned at three sides correspond to three-chip type color conversion element 13,
The light inlet setting that X-type closes color filtering apparatus 14 is wherein corresponded to per a piece of color conversion element.By three-chip type color conversion
R, G, B primary colours stimulated light that element 13 is emitted are entered by three light inlets that X-type closes color filtering apparatus 14 respectively, and X-type closes color filter
Electro-optical device 14 the three beams primary colours stimulated light from three light inlets is pooled by way of transmission or reflection it is a branch of, by going out light
Mouth is emitted to projection lens 20.In the present embodiment, X-type, which closes color filtering apparatus 14, can be x-cube, can also be with
It is the light-splitting color-combination plate group being made of two panels light-splitting color-combination plate, such as, but not limited to light splitting piece square crossing.
The corresponding three-chip type color conversion element 13 of three-chip type optical modulator 12 is arranged, specifically, just per a piece of optical modulator
Corresponding color conversion element is arranged, i.e., are as follows: the setting of 121 face indigo plant Fluorescence chip 131 of blue light transmission type LCD optical modulator,
The setting of 122 face green fluorescence chip 132 of green light transmission formula LCD optical modulator, red transmission formula LCD 123 faces of optical modulator are red
Fluorescence chip 133 is arranged.Reflective mirror 161 positioned at the first optical channel is towards blue light transmission type LCD optical modulator 121 and opposite
The setting of the generally ramped 45 degree of angles of blue light transmission type LCD optical modulator 121, second level light splitting piece 112a is towards green light transmission formula LCD
Optical modulator 122 and the opposite generally ramped 45 degree of angles of green light transmission formula LCD optical modulator 122 setting, positioned at third optical channel
Reflective mirror 163 substantially inclines towards red transmission formula LCD optical modulator 123 and relative to red transmission formula LCD optical modulator 123
Oblique 45 degree of angles setting.
In the above-described embodiment, the light splitting ratio of light-dividing device 11a is with the first order light splitting piece 111a of selection and second
Grade light splitting piece 112a is related, for example, the first order light splitting piece 111a and second level light splitting piece 112a in selection have suitable film
After layer material and thicknesses of layers, it can make to be incident to red transmission formula LCD optical modulator 123, green light transmission formula LCD light modulation respectively
The brightness ratio substantially 32:63:5 of exciting light on device 122 and blue light transmission type LCD optical modulator 121, and finally filled by conjunction color
Set the brightness ratio substantially 20:72:8 of the red, green, blue image light of 14 outgoing.It is appreciated that there is different film layers by selecting
The first order light splitting piece 111a of material or thickness, second level light splitting piece 112a, can be changed above-mentioned light splitting ratio.Therefore, by right
Light-dividing device is rationally arranged, can reasonable distribution three-beam light splitting ratio, can such as make enter three-chip type optical modulator in it is right
The light beam that the optical modulator of G (green) picture signal should be modulated is bigger, therefore can make light-use by rationally setting light splitting ratio
Rationally, the efficiency of light energy utilization is promoted.
In the above-described embodiment, it will be understood that per a piece of optical modulator with corresponding per a piece of color conversion element phase
The position of light inlet can be exchanged, correspondingly, first order light splitting piece 111 and the position of second level light splitting piece 112 can be exchanged
Or other light splitting pieces can be changed to.
In addition, in the present embodiment, the three-chip type color conversion element 13 is transmission-type, so in other embodiments
In, the three-chip type color conversion element 13 can also be reflective, reach three-chip type from three-chip type optical modulator 12 in light beam
Color conversion element 13 and by three-chip type color conversion element 13 to close color device 14 optical path in, as needed, Ke Yishe
Set necessary optical device.Splicing structure is arranged by multi-disc color conversion element in addition, can also be per a piece of color conversion element
At.It is also possible to be arranged by multi-disc optical modulator per a piece of optical modulator and is spliced to form.
It please refers to shown in 3, is the system architecture diagram of second of embodiment of excitating light strength control system 1 shown in Fig. 1,
Different from the first embodiment, in the present embodiment, the light source 10b uses monochromatic source, and the light-dividing device 11b is adopted
The monochromatic light is divided into three beams with light splitting device and phase delaying device appropriate and is respectively provided with special polarization state
Polarised light, to realize light splitting, specifically in the present embodiment, the light-dividing device 11b includes first order polarization spectroscope
(Polarization Beam Splitter, call PBS in the following text) 111b, second level PBS 112b and it is set to first order PBS
Phase delay device 113 between 111b and second level PBS 112b.First order PBS 111b will be from the monochromatic light of light source 10b incidence
It is divided into the light of two beam different polarization states, respectively P polarization state light (calling P light in the following text) (is called in the following text with S-polarization state light in the present embodiment
S light), wherein S light is reflected into the first optical channel by first order PBS 111b, enters three-chip type light modulation via the first optical channel
The blue light optical modulator 121 of device 12.P light is transmitted through phase delay device 113 by first order PBS 111b, by phase delay device 113
It is incident to second level PBS 112b after postponing certain phase angle, second level PBS 112b continues to separate P from incident light beam
Light and S light, wherein S light is reflected into the second optical channel by second level PBS 112b, enters three-chip type light via the second optical channel
The green light optical modulator 122 of modulator 12, P light are transmitted into third optical channel by second level PBS 112b, logical via third light
Road enters the feux rouges optical modulator 123 of three-chip type optical modulator 12.
In the present embodiment, first order PBS 111b and incident beam direction are substantially in that 45 degree of angles are arranged, phase delay
Phase 113 is substantially vertical with incident beam direction, and second level PBS 112b and incident beam direction are substantially in that 45 degree of angles are arranged.
In the present embodiment, the phase delay device 113 can select quarter-wave plate, half wave plate or liquid
Brilliant wave plate, or above-mentioned wave plate is selected to carry out any appropriate combination, certainly, the phase delay device 113 can also select other
Suitable optical element device achievees the purpose that incident beam phase delay.
In the present embodiment, other component such as three-chip type optical modulator 12, three-chip type color conversion element 13 and conjunction
Structure, function and the arrangement position of color device 14 can refer to the first embodiment, can also be in the first embodiment
On the basis of make in change appropriate, such as three-chip type optical modulator 12 per a piece of optical modulator and three-chip type color conversion member
The position of color device 14 of being involutory per a piece of color conversion element in part 13 can do corresponding variation, as needed whether,
In first, second, third optical channel can with or be not provided with optical device.
In the present embodiment, the light splitting ratio of light-dividing device 11b and the specific PBS of selection and phase delaying device phase
It closes, the light splitting ratio of light-dividing device 11b can be changed in the PBS and/or phase delaying device that change selection.
It please refers to shown in Fig. 4, is the system architecture of the third embodiment of excitating light strength control system 1 shown in Fig. 1
Figure.Different from first two embodiment, in the present embodiment, the light source 10c uses linear polarization light source, the light-dividing device
11c realizes light splitting using white glass, and specifically in the present embodiment, the light-dividing device 11c includes first order white glass point
Electro-optical device 111c and second level white glass light-dividing device 112c.First order white glass light-dividing device 111c will be incident from light source 10c
Linearly polarized light fractional transmission and part reflection be divided into two-way, wherein reflect all the way enter the first optical channel, via the first light
Channel enters the blue light optical modulator 121 of three-chip type optical modulator 12；Transmission enters second level white glass light-dividing device all the way
112c is continued to be divided into two-way by second level white glass light-dividing device 112c in such a way that fractional transmission and part reflect, wherein
Reflection enters the second optical channel all the way, and the green light optical modulator 122 of three-chip type optical modulator 12 is entered via the second optical channel,
Transmission enters third optical channel all the way, and the feux rouges optical modulator 123 of three-chip type optical modulator 12 is entered via third optical channel.
In the present embodiment, first order white glass light-dividing device 111c is substantially in that 45 degree of angles are set with incident beam direction
It sets, second level white glass light-dividing device 112c is also substantially in 45 degree of angle settings with incident beam direction.The light source 10c outgoing
Linearly polarized light can be P light, S light or a combination thereof.
Please refer to shown in Fig. 5 and Fig. 6, for white glass transmit with the schematic diagram that reflects incident linearly polarized light, wherein Fig. 5,
The white glass illustrated in Fig. 6 is monolithic, and refractive index is 1.5, is substantially in that 45 degree of angles are arranged with incident light beam.In Fig. 5, enter
Penetrating is P light, and 50 first face of white glass is by the 1% of incident beam reflection, another 99% transmission, and the second face of white glass 50 will be from the
0.99% reflection of 1% in light beam, i.e. incident beam that transmit on one side, remaining 98.01% transmission, therefore, incident P
Wide cause has 1.99% to be transmitted by the reflection of white glass 50,98.01%.It is incident for S light, 60 first face of white glass general in Fig. 6
9% reflection of incident beam, another 91% transmission, the second face of white glass 60 by light beam that the transmission of the first face comes 9%, be into
8.19% reflection of irradiating light beam, remaining 82.81% transmission, therefore, the wide cause of incident S have 17.19% anti-by white glass 60
It penetrates, 82.81% is transmitted.
There is certain reflection and transmission proportion to incident P light, S light based on white glass, therefore in the present embodiment
It can be changed point by the white glass the piece number in transformation first order white glass device 111b and/or second level white glass device 112b
The light splitting ratio of electro-optical device 11b.What it is in light source 10c outgoing is P light and S light time, can also by the ratio of change P light and S light come
Achieve the purpose that change light-dividing device 11b light splitting ratio.Other component such as three-chip type optical modulator 12, three in present embodiment
Chip color conversion element 13 and the structure, function and arrangement position for closing color device 14 can refer to the first embodiment party
Formula can also make change appropriate on the basis of the first embodiment.Details are not described herein.
It please refers to shown in Fig. 7, is the light splitting dress in the 4th kind of embodiment of excitating light strength control system 1 shown in Fig. 1
The schematic diagram set.In the present embodiment, the light source 10d uses white light source, and the light-dividing device 11d is a diffraction device
111d, the diffraction device are automatically controlled device, are controlled using a control unit 112, in the control of described control unit 114
Under, the diffraction device 111d is emitted three roadbed color stimulated light R, G, B, and described three roadbeds color stimulated light R, G, B is via three light
Channel is suitably guided to three-chip type optical modulator 12.Other component can refer to other embodiments in present embodiment,
Details are not described herein.
In the above-described embodiment, the controller 15 can be according to raw image data and three-chip type color conversion element 13
The excitating light strength that the phosphor characteristic curve controlled being coated with is emitted from optical modulator 12 promotes the image product for being emitted to screen
Matter.Still by taking 3LCD optical modulator 12a as an example, each R, G, B image signal value (i.e. R, G, B of corresponding each frame image data
Pixel value), controller 15 can control the signal value of 3LCD optical modulator 12a, so that control is emitted from every a piece of LCD optical modulator
Excitating light strength.Wherein, each picture signal of corresponding each frame image, the signal value of the 3LCD optical modulator 12a is just
Than corresponding to voltage value (or current value etc.) on light valve in being added on 3LCD optical modulator 12a.The following specifically describes controllers 15 such as
What control 3LCD optical modulator 12a.
The signal value of the 3LCD optical modulator 12a is by controller 15 according to image signal value and three-chip type color conversion member
The specific fluorescent material (as yellow, green, red, blue fluorescent material) and/or the response curve of scattering material that are coated on part 13 determines.
For different fluorescent material and scattering material, the response curve of different exciting lights is saturated and the factors such as light saturation by its heat
Influence, please refer to shown in Fig. 8 and Fig. 9, respectively red, green, blue fluorescent material, scattering material are respectively blue laser to exciting light
With the response curve of UV light.Its middle line x and x1 represents the response curve of blue scattering material and blue fluorescent material, and y and y1 are represented
The response curve of green fluorescence material, z and z1 represent the response curve of red fluorescent material, it can be seen that in same excitation light intensity
Under degree, what corresponding red, green, blue fluorescent material or scattering material generated is excited luminous intensity difference, so as to cause the image of outgoing
Brightness value also can be different, in addition, under the excitation of different exciting lights, using fluorescent material and using the response song of scattering material
Line is also different, and if Fig. 8 is using blue laser, the response curve that polarization-maintaining scatters powder is substantially linear incremental, and UV light is used in Fig. 9
Excitated blue fluorescent powder, blue colour fluorescent powder generates heat, therefore the response curve of blue colour fluorescent powder is in the trend, non-linear of saturation
It is incremented by.
In one embodiment, the response curve data of corresponding fluorescent material/scattering material can be stored in controller
15 or other devices that can get of controller 15 in, by the signal value and the image signal value that are related to 3LCD optical modulator 12a with
And the relevant formula of fluorescence/scattering material response curve parameter is also stored in controller 15 or other the retrievable dresses of controller 15
In setting, to can be calculated by controller 15 when being directed to different R, G, B image signal values and obtain corresponding red, green, blue picture
The signal value of vegetarian refreshments, to control the excitating light strength of 3LCD optical modulator 12a outgoing.For example, being directed to specific R picture signal
When value, it can be obtained according to the response curve parameter of red fluorescence material with the specific R image signal value calculating by controller 15
Obtain the signal value of accordingly red pixel；It, can be by controller 15 according to green fluorescent material when for specific G image signal value
Response curve parameter and the specific G image signal value calculate the signal value of the corresponding green pixel point of acquisition；And so on, it can
Signal value required for obtaining, thus the excitating light strength that control is emitted from 3LCD optical modulator 12a.
It further, in another embodiment, can also be according to the response curve number of specific fluorescent material/scattering material
According to the relation list for the signal value for making every R, G, a B image signal value (i.e. R, G, B pixel value) and 3LCD optical modulator 12a,
The list is stored in other devices that controller 15 or controller 15 can be got, and for a frame image, controller 15 can root
The list is inquired according to image signal value to obtain the signal value of the corresponding 3LCD optical modulator 12a of all image signal values, from
And control the excitating light strength being emitted from 3LCD optical modulator 12a.
In a kind of mode, can by controller 15 according to the response curve data of specific fluorescent material/scattering material calculate it is red,
The signal value of the corresponding 3LCD optical modulator 12a of green, blue each image signal value 0-255, then by each image signal value with
The signal value one-to-one correspondence of 3LCD optical modulator 12a is fabricated to the relation list.
In another way, it can detect by other means and obtain each image signal value and 3LCD optical modulator 12a's
The relation list of signal value please refers to shown in Figure 10, and Figure 10 shows the process that a kind of detection mode obtains the relation list
Then figure is examined firstly, the screen that will test is tuned into red, complete green or full indigo plant picture (step S1001) entirely using detection instrument
Survey the corresponding excitation light intensity angle value (step of each image signal value 0-255 of red, complete green or full indigo plant picture sub-screen entirely
S1002), furthermore, calculated according to excitation light intensity angle value and obtain corresponding LCD signal value (step S1003), finally, establishing each
The relation list (step S1004) of the signal value of image signal value and 3LCD optical modulator 12a.It, can also in above-mentioned detection mode
Each image signal value 0-255 to be directly entirely red, the complete green or complete blue picture sub-screen using detection instrument detection is corresponding
The signal value of 3LCD optical modulator 12a so avoids subsequent calculating step.
In conclusion excitating light strength control system provided in an embodiment of the present invention and optical projection system are used in imaging section
Three-chip type optical modulator and three-chip type color conversion element, another setting close color device exports three-chip type color conversion element three
Beam coloured light is merged into a branch of, closes color device and X-type is used to close color filtering apparatus, three-chip type color conversion member in some embodiments
Part and three-chip type optical modulator close color filtering apparatus three weeks around X-type is set to, and realize to the seamless spliced of light mixing, make to excite
Luminous intensity Control system architecture is more compact；In illumination portion, light source outgoing beam is divided by three beams by light-dividing device, and respectively will
Three light beams are directed into three-chip type optical modulator, by the way that light-dividing device is rationally arranged, can reasonable distribution three-beam point
Light ratio can such as make the light beam for entering the optical modulator of corresponding modulating G (green) picture signal in three-chip type optical modulator bigger, because
This can make light-use reasonable by rationally setting light splitting ratio, promote the efficiency of light energy utilization；In control unit, pass through original image number
According to what is be emitted with the fluorescent material/scattering material response curve control optical modulator being coated on three-chip type color conversion element
Excitating light strength improves the image quality for being emitted to screen.
Embodiment of above is only used to illustrate the technical scheme of the present invention and not to limit it, although referring to the above preferable embodiment party
Formula describes the invention in detail, those skilled in the art should understand that, it can be to technical solution of the present invention
It modifies or equivalent replacement should not all be detached from the spirit and scope of technical solution of the present invention.
Claims (20)
1. a kind of excitating light strength control system, including illumination portion, imaging section and control unit, which is characterized in that the illumination portion
Including light source and light-dividing device, the imaging section includes three-chip type optical modulator, three-chip type color conversion element and closes color device,
The exciting light being emitted from the light source is divided into three beams by the light-dividing device, and the three beams exciting light is imported into the three-chip type light
Modulator is modulated, and three-chip type color conversion element described in the excitation through ovennodulation generates three color stimulated lights,
The conjunction color device is used to for three color being excited a branch of outgoing of photosynthesis, and the control unit is for controlling the three-chip type light tune
The excitating light strength of device outgoing processed.
2. excitating light strength control system as described in claim 1, which is characterized in that the light-dividing device includes light splitting piece,
Exciting light sent from the light source is divided into three beams by light splitting piece.
3. excitating light strength control system as claimed in claim 2, which is characterized in that the exciting light that the light source issues is indigo plant
The blue laser or ultraviolet light are divided into three beams by laser or ultraviolet light, the light splitting piece.
4. excitating light strength control system as claimed in claim 2, which is characterized in that the light splitting piece includes first order light splitting
The light beam that the light source is emitted is divided into two beams by piece and second level light splitting piece, the first order light splitting piece, wherein a branch of enter institute
The wherein a piece of of three-chip type optical modulator is stated, another beam enters the second level light splitting piece, is divided by the second level light splitting piece
The other two panels of the three-chip type optical modulator is respectively enterd after two beams.
5. excitating light strength control system as described in claim 1, which is characterized in that the light-dividing device includes polarization spectro
Exciting light sent from the light source is divided into three beams by light splitting device by device and phase delaying device.
6. excitating light strength control system as claimed in claim 5, which is characterized in that the exciting light that the light source issues is single
The monochromatic light is divided into the polarised light that three beams is respectively provided with special polarization state by coloured light, the light splitting device.
7. excitating light strength control system as claimed in claim 5, which is characterized in that the light-dividing device includes that the first order is inclined
Vibration spectroscope, second level polarization spectroscope and the phase being set between first order polarization spectroscope and second level polarization spectroscope
Position delayer, the light beam that the light source is emitted is divided into two beam polarised lights by the first order polarization spectroscope, wherein a branch of entrance
The three-chip type optical modulator it is wherein a piece of, phase delay device described in another Shu Jing postpone phase after enter the second level polarization point
Light microscopic, is continued to be divided into after two beam polarised lights and respectively enters other the two of the three-chip type optical modulator by the second level light splitting piece
Piece.
8. excitating light strength control system as claimed in claim 7, which is characterized in that the phase delay device using four/
One wave plate, half wave plate and/or liquid crystal wave plate.
9. excitating light strength control system as described in claim 1, which is characterized in that the light-dividing device includes white glass dress
It sets, exciting light sent from the light source is divided by three beams by the white glass device.
10. excitating light strength control system as claimed in claim 9, which is characterized in that the exciting light that the light source issues is
The linearly polarized light is divided into three beams in such a way that fractional transmission and part reflect by linearly polarized light, the white glass device.
11. excitating light strength control system as claimed in claim 9, which is characterized in that the light-dividing device includes the first order
The light beam that the light source is emitted is divided into two by white glass device and second level white glass device, the first order white glass device
Beam, wherein a branch of into the wherein a piece of of the three-chip type optical modulator, another beam enters the second level white glass device, quilt
The second level white glass device is divided into the other two panels that the three-chip type optical modulator is respectively enterd after two beams.
12. excitating light strength control system as claimed in claim 11, which is characterized in that the first order white glass device packet
One or more white glass is included, the second level white glass device includes one or more white glass.
13. excitating light strength control system as described in claim 1, which is characterized in that the light-dividing device includes diffractometer
The exciting light being emitted from the light source is divided into three in the control of described control unit by part and a control unit, the diffractive optical element
Beam.
14. excitating light strength control system as claimed in claim 13, which is characterized in that the exciting light that the light source issues is
The white light is divided into red, green, blue three beams primary lights by white light, the diffractive optical element.
15. excitating light strength control system as described in claim 1, which is characterized in that the conjunction color device is that an X-type closes color
Filtering apparatus, three sides that the X-type closes color filtering apparatus are equipped with light inlet, the other side is equipped with light-emitting window, the three-chip type color
The three pieces color conversion element of conversion element respectively corresponds the light inlet setting that the X-type closes color filtering apparatus.
16. excitating light strength control system as claimed in claim 15, which is characterized in that the X-type closes color filtering apparatus and is
One x-cube is a light-splitting color-combination plate group.
17. excitating light strength control system as described in claim 1, which is characterized in that the three-chip type color conversion element
Per a kind of pixel is arranged on a piece of color conversion element, every kind of pixel is coated with by corresponding fluorescent material or scattering material
Formed, the control unit for receiving raw image data, according to the raw image data and corresponding fluorescent material or
The excitating light strength of the outgoing of three-chip type optical modulator described in the response curve state modulator of scattering material.
18. excitating light strength control system as claimed in claim 17, which is characterized in that the control unit is according to described original
The image signal value of image data and the fluorescent material being coated on the three-chip type color conversion element and/or scattering
The response curve parameter of material calculates the signal value of the three-chip type optical modulator, and the three-chip type optical modulator is according to the letter
Number value control outgoing excitating light strength.
19. excitating light strength control system as described in claim 1, which is characterized in that the optical modulator is LCD light modulation
Device.
20. a kind of optical projection system, which is characterized in that the optical projection system includes the exciting light as described in claim 1-19 is any
Intensity control system and projection lens, the light beam being emitted from the excitating light strength control system is through the projection lens projects
To screen, color image is presented.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710349016.7A CN108957921B (en) | 2017-05-17 | 2017-05-17 | Excitation light intensity control system and projection system |
| PCT/CN2017/095421 WO2018209818A1 (en) | 2017-05-17 | 2017-08-01 | Excitation light intensity control system and projection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710349016.7A CN108957921B (en) | 2017-05-17 | 2017-05-17 | Excitation light intensity control system and projection system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108957921A true CN108957921A (en) | 2018-12-07 |
| CN108957921B CN108957921B (en) | 2021-05-04 |
Family
ID=64273269
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710349016.7A Active CN108957921B (en) | 2017-05-17 | 2017-05-17 | Excitation light intensity control system and projection system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN108957921B (en) |
| WO (1) | WO2018209818A1 (en) |
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| CN108957921B (en) | 2021-05-04 |
| WO2018209818A1 (en) | 2018-11-22 |
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