CN108957922A - 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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- CN108957922A CN108957922A CN201710349594.0A CN201710349594A CN108957922A CN 108957922 A CN108957922 A CN 108957922A CN 201710349594 A CN201710349594 A CN 201710349594A CN 108957922 A CN108957922 A CN 108957922A
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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
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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
-
- 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
- G03B21/2053—Intensity control of illuminating light
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Optics & Photonics (AREA)
- Projection Apparatus (AREA)
Abstract
The present invention relates to a kind of excitating light strength control systems, including illumination portion, imaging section and control unit, the illumination portion includes at least light source, the imaging section includes at least optical modulator and color conversion element, the exciting light being emitted from the light source is imported into the optical modulator and is modulated, color conversion element described in the excitation through ovennodulation generates polychrome stimulated light, multiple pixels are arranged on the color conversion element, each pixel includes 1 sub-pixel points, every sub-pixel point is coated with by corresponding phosphor material powder to be formed, the control unit is for receiving raw image data, the excitating light strength that the excitating light strength or the control light source being emitted according to optical modulator described in the response curve state modulator of corresponding fluorescent powder are emitted.Using the present invention, optical energy utilization efficiency can be improved, the present invention also provides a kind of optical projection systems using the laser light intensity control system.
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 the imaging section includes optical modulator and color conversion element, the exciting light being emitted from the light source
The optical modulator is imported into be modulated, color conversion element described in the excitation through ovennodulation generate polychrome by
Laser, is arranged multiple pixels on the color conversion element, and each pixel includes 1 sub-pixel points, and every kind
Sub-pixel point is coated with by corresponding phosphor material powder to be formed, and the control unit is for receiving raw image data, according to corresponding
The excitation of the excitating light strength of the outgoing of optical modulator described in the response curve state modulator of fluorescent powder or the control light source outgoing
Luminous intensity.
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 exciting light being emitted from the excitating light strength control system is through the projection lens projects to screen
Curtain, color image is presented.
The advantages of excitating light strength control system and optical projection system provided in an embodiment of the present invention, is: by according to original
Image data and the fluorescent material/scattering material response curve data specifically used swash optical modulator or light source outgoing
Luminous intensity is controlled, and not only ensure that the image for being emitted to screen is undistorted, and improve optical energy utilization efficiency.
Detailed description of the invention
Fig. 1 is the system block diagram of the excitating light strength control system of the first embodiment of the invention.
Fig. 2 is the schematic diagram of the illumination portion of excitating light strength control system shown in Fig. 1 and the index path of part before imaging section.
Fig. 3 be Fig. 1 shown in excitating light strength control system imaging section after part index path schematic diagram.
Fig. 4 is the pixel distribution schematic diagram of the Fluorescence chip of excitating light strength control system shown in Fig. 1.
Fig. 5 be the excitating light strength control system in second of embodiment of the invention imaging section after part index path
Schematic diagram.
Fig. 6 is exciting light when being blue laser, and red, green, blue fluorescent material/scattering material illustrates the response curve of exciting light
Figure.
Fig. 7 is that exciting light is UV light time, response curve schematic diagram of the red, green, blue fluorescent material to exciting light.
Fig. 8 is the method flow diagram that the relation list of image signal value and LCD signal value is obtained by detection mode.
Fig. 9 is the system block diagram of the excitating light strength control system of the third embodiment of the invention.
Figure 10 is to excite excitating light strength contrast schematic diagram required for red, green, blue for identical image signal value.
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 include at least light source 10, it is described at
Picture portion includes at least optical modulator 11 and color conversion element 12, and the control unit includes controller 13.The controller 13 connects
Raw image data to be shown is received, the exciting light at optical modulator 11 and/or at light source 10 is adjusted according to raw image data
Intensity, under the control of the controller 13, for each frame image, 11 metering needle of optical modulator to each pixel (or
Sub-pixel) excitating light strength, enter color translation element 12 via the exciting light after adjusting, excitation color translation element 12 produces
Raw polychrome stimulated light forms a color image frame such as R (red), G (green), B (indigo plant) stimulated light.In the present embodiment, described to swash
Luminous intensity control system is in an optical projection system, and the color image generated by color translation element 12 is via projection system
The projection lens 20 of system 2 is finally emitted to screen (not shown).In the present embodiment, the excitating light strength control system 1
It further include the relay system 14 being set between light source 10 and optical modulator 11.
It please refers to shown in Fig. 2, is the index path and imaging section of the illumination portion of excitating light strength control system 1 shown in Fig. 1
Path-splitting diagram in front is intended to, and as exciting light is emitted to the light path part before color translation element 12.In present embodiment
In, the light source 10 uses laser light source, and is blue laser light source.Therefore, the exciting light is blue laser.In present embodiment
In, the relay system 14 includes fly eye lens array 141, convex lens 142 and reflective mirror 143.The fly eye lens array
141, convex lens 142 and 143 sequential of reflective mirror, the blue laser being emitted from the light source 10 enter fly eye lens array 141,
After fly eye lens array 141 improves uniformity and brightness, into convex lens 142.The indigo plant of 142 pairs of convex lens entrance swashs
Light carries out the hot spot that shaping forms suitable 11 size shape of optical modulator, and the hot spot enters described after the reflection of reflective mirror 143
Optical modulator 11.In the present embodiment, the fly eye lens array 141 is double fly eye lens array.The fly's-eye lens
Array 141 is arranged substantially in parallel with convex lens 142, and optical axis direction substantially overlaps, and the optical modulator 11 and the compound eye are saturating
Lens array 141, the substantially vertical setting of convex lens 142, the reflective mirror 143 and the convex lens 142, optical modulator 11 are inclined
Setting such as is substantially arranged in 45 degree angles with the convex lens 142, optical modulator 11, reflecting surface 1431 while inclination towards
The convex lens 142 and optical modulator 11, with the blue laser reflection that will be emitted from convex lens 142 to optical modulator 11.
It is appreciated that other optical components composition can also be used in relay system, or different arrangement modes is used, only
Need it the exciting light that light source issues suitably can be directed into optical modulator 11.
The optical modulator 11 is LCD optical modulator 11a, certainly, the LCD optical modulator 11a in the present embodiment
It is only citing, in other embodiments, the optical modulator 11 is also possible to DMD optical modulator or LCOS light modulator
Deng.The LCD optical modulator 11a is under the control of controller 13, for the image data of each frame image, to from reflective mirror
The 143 blue laser for being emitted to LCD optical modulator 11a are modulated, to be allowed to carry image information, the blue laser through ovennodulation
Including two parts, two parts enter a polarization spectroscope (Polarization Beam Splitter, call PBS in the following text) 16.
The PBS 16 by two parts indigo plant separation by laser through ovennodulation at the first polarised light and the second polarised light, in the present embodiment
The light (hereinafter referred to as S light) that first polarised light is the light (hereinafter referred to as P light) of P polarization state, the second polarised light is S-polarization state,
Middle S light enters color conversion element 12.In the present embodiment, the PBS 16 is set to the light side out of LCD optical modulator 11a
To including opposite first surface 161 and second surface 162.The PBS 16 and LCD optical modulator 11a is inclined to set, such as
It is arranged in 45 degree of angles, first surface 161 is towards LCD optical modulator 11a, and second surface is backwards to LCD optical modulator 11.The PBS
16 separation P light and S light, wherein P light is transmitted to be reflected from the outgoing of second surface 162, S light from first surface 161 and is emitted.
It please refers to shown in Fig. 3, is that the rear portion path-splitting of the imaging section of excitating light strength control system 1 shown in Fig. 1 illustrates meaning
Figure, in the present embodiment, the rear portion path-splitting of the imaging section shows the color conversion element 12, quarter wave plate 17
And dichroic piece 18, the color conversion element 12 is Fluorescence chip 12a in the present embodiment, and is reflective fluorescent core
Piece.The quarter wave plate 17 is arranged substantially in parallel with the Fluorescence chip 12a, and the dichroic piece 18 enters towards the S light simultaneously
Direction is penetrated with the quarter wave plate 17 and is inclined to set with S light incident direction and quarter wave plate 17, such as with S light incident direction
And quarter wave plate 17 is arranged at 45 degree of angles.
In the present embodiment, it should be noted that, fluorescent material and/or scattering material are coated with by passing through on a substrate
Multiple pixels are formed, so that the Fluorescence chip 12a be made, each pixel is made of 3 sub-pixel point of RGB, often
It is respectively coated corresponding fluorescent material and/or scattering material on sub-pixel point, therefore, under excitation, Fluorescence chip
Each sub-pixel point of 12a generates red, green, blue stimulated light or scattering stimulated light respectively, to keep Fluorescence chip 12a outgoing colored
Image light.In other embodiments, sub-pixel point type, quantity and the color of Fluorescence chip can be changed as needed, for example,
Each pixel only includes 2 sub-pixel points or more sub-pixel point, and the quantity of every sub-pixel is one or more, often
A pixel includes other color sub-pixels points different from redgreenblue.
It please refers to shown in Fig. 4, is R, G, B sub-pixel point distribution schematic diagram on the Fluorescence chip 12a in present embodiment,
The Fluorescence chip 12a be used under the excitation of the exciting light, generate R, G, B stimulated light or generate R, G stimulated light and
The exciting light is scattered, color image is formed.It include multiple pixel S on the Fluorescence chip 12a, the pixel S presses square
Battle array arrangement, each pixel S include 1 sub-pixel points, and every sub-pixel point is coated with shape by corresponding phosphor material powder
At alternatively, being coated with corresponding scattering material, in the present embodiment, each pixel S specifically includes a red sub-pixels point
R, a two green sub-pixel point G and blue sub-pixel point B.In the effect of exciting light, red sub-pixels point R generates feux rouges, green son
Pixel G generates green light, and indigo plant sub-pixel point B generates the blue laser of blue light or scattering incidence, respectively according to each sub-pixel point
Bright intensity, each pixel present needed for color, so that Fluorescence chip 12a be made to be emitted to screen by projection lens 20
Image be a color image frame.
It is appreciated that the pixel S can be regularly arranged by other, for example, pixel might not be finally arranged in
For matrix, may be arranged in as other desired shape, such as round, each pixel S only needs simultaneously to include two seed pictures
Vegetarian refreshments includes 3 sub-pixel point of red, green, blue simultaneously, can be according to practical need as the quantity and ratio of every sub-pixel point
It chooses.
Referring again to shown in Fig. 3, the dichroic piece 18 reflects S light, transmission P light and R (red), G (green) light.By PBS
After the S light of 16 outgoing reaches dichroic piece 18, the quarter wave plate 17 is reflexed to by dichroic piece 18, the S light passes through 1/
Become circularly polarized light after 4 wave plates 17, after the circularly polarized light reaches Fluorescence chip 12a, corresponding red, the green sub-pixel point R of excitation,
G generates feux rouges and green light, the feux rouges and green light are transmitted after quarter wave plate 17 by the dichroic piece 18.Separately in this embodiment party
Blue sub-pixel point B coating polarization-maintaining, the i.e. constant scattering powder in guarantee polarization direction, therefore circular polarization in formula, on Fluorescence chip 12a
On light arrival Fluorescence chip 12 after corresponding blue sub-pixel point B, is scattered by polarization-maintaining, become P light, institute after quarter wave plate 17 again
P light is stated to be transmitted by the dichroic piece 18.
It is appreciated that the difference arranged according to optical path direction, the dichroic piece 18 is also possible to transmit exciting light, reflection
The light that the light and transmitting that stimulated light, i.e. transmission are entered by illumination portion are emitted by Fluorescence chip 12a.
It is appreciated that the quantity of Fluorescence chip 12a is also not necessarily limited to a piece of, it is also possible to two panels or multi-disc, by certain
Rule is arranged.Such as, two panels Fluorescence chip 12a can be arranged side by side.
Although dichroic piece 18 is most it is appreciated that in above embodiment being using S light is incident to dichroic piece 18
Eventually outgoing P light and red, green light so be also possible to for P light to be incident to dichroic piece, dichroic piece 18 finally outgoing S light and it is red,
Green light.In addition, can also have different Scheme Choices based on its polarization state when using other primary lights as exciting light.
It is appreciated that transmission-type Fluorescence chip can also be used, the one side of exciting light from transmission-type Fluorescence chip is incident, is excited
Light is emitted from the other side of transmission-type Fluorescence chip, at this point it is possible to omit the use of dichroic piece and wave plate.
It is appreciated that can also be other suitable sources, for example, ultraviolet (UV) light source in addition to red, green, blue primary lights.
It please refers to shown in Fig. 5, for the rear portion path-splitting figure for utilizing UV light source imaging section in second of embodiment of the invention
Schematic diagram.Imaging section rear portion path-splitting shows dichroic piece 31 and Fluorescence chip 32, and the dichroic piece 31 is simultaneously
It is inclined to set towards UV light incident direction and Fluorescence chip 32 and with UV light incident direction and Fluorescence chip 32.Described two to
Color chips 31 reflects UV light, transmits red, green, blue.The UV light that UV light source issues is being believed by light modulator modulates at image is carried
After breath, Fluorescence chip 32 is reflected by dichroic piece 31, red, green, blue sub-pixel point R, G, B minute on the Fluorescence chip 32
It is not coated with red fluorescent material, green fluorescence material and blue fluorescent material, it is corresponding on Fluorescence chip 32 under the excitation of UV exciting light
Red, green, blue sub-pixel point R, G, B generate red, green, blue, and the red, green, blue is transmitted by the dichroic piece 31, and is passed through
Projection lens is emitted to screen to form a color image frame.
In the present embodiment, the controllable excitating light strength being emitted from optical modulator 11 of the controller 13.Still with LCD
For optical modulator 11a, each R, G, B image signal value (i.e. sub-pixel value) of corresponding each frame image data, controller
The signal value of 13 controllable LCD optical modulators 11, thus the excitating light strength that control is emitted from LCD optical modulator 11a.Wherein,
Each picture signal of corresponding each frame image, the LCD signal value, which is proportional to, to be added on LCD optical modulator 11a and corresponds on light valve
Voltage value (or current value etc.).The following specifically describes controllers how to control LCD optical modulator 11a.
The LCD signal value is by controller 13 according to the specific phosphor being coated on image signal value and Fluorescence chip 12a
(such as yellow, green, red, blue fluorescent material) or the response curve of scattering material are expected to determine.For different fluorescent materials and scattering
Material is influenced the response curve of different exciting lights with factors such as light saturations by its heat saturation, please refers to Fig. 6 and Fig. 7 institute
Show, respectively the response curve of red, green, blue fluorescent material or scattering material to exciting light respectively blue laser and UV light.Its
Middle line x and x1 respectively represents the response curve of blue scattering material and blue fluorescent material, and the response that y and y1 represent green fluorescence material is bent
Line, z and z1 represent the response curve of red fluorescent material, it can be seen that under same excitating light strength, corresponding red, green, blue
What fluorescent material or scattering material generated is excited luminous intensity difference, also can be different so as to cause the image brightness values of outgoing, in addition,
It is also different from using the response curve of scattering material using fluorescent material under the excitation of different exciting lights, if Fig. 6 is to use
Blue laser is exciting light, and the response curve that polarization-maintaining scatters powder is substantially linear incremental, and UV light excitated blue fluorescence is used in Fig. 7
Material, blue fluorescent material generates heat, therefore the response curve of blue fluorescent material is in the trend of saturation, non-linear increasing.
In one embodiment, the response curve data of corresponding fluorescent material/scattering material can be stored in controller
13 or other devices that can get of controller 13 in, LCD signal value and image signal value and fluorescent material/scattering will be related to
The relevant formula of response curve parameter of material is also stored in controller 13 or other the retrievable devices of controller 13, thus
When for different R, G, B image signal values, the LCD for obtaining corresponding red, green, blue sub-pixel point can be calculated by controller 13
Signal value, the excitating light strength of control LCD optical modulator 11a outgoing.For example, when being directed to specific R image signal value, Ke Yiyou
Controller 13 calculates the corresponding red pieces of acquisition according to the response curve parameter of red fluorescence material and the specific R image signal value
The LCD signal value of pixel；It, can be by controller 13 according to the sound of green fluorescent material when for specific G image signal value
Parameter of curve and the specific G image signal value is answered to calculate the LCD signal value of the corresponding green sub-pixel point of acquisition；And so on,
LCD signal value required for can get, thus the excitating light strength that control is emitted from LCD optical modulator 11a.
It further, in another embodiment, can also be according to the response curve data creating figure of specific fluorescent material
As the relation list of signal value (i.e. sub-pixel value) and LCD signal value, the list is stored in controller 13 or controller 13 and can obtain
In other devices got, for a frame image, it is all to obtain that controller 13 can inquire the list according to image signal value
The corresponding LCD signal value of image signal value, thus the excitating light strength that control is emitted from LCD optical modulator 11a.
Believe specifically, each image of R, G, B can be calculated according to the response curve data of specific fluorescent material by controller 13
Number corresponding LCD signal value of value 0-255, then each image signal value and LCD signal value one-to-one correspondence are fabricated to the relationship
List.
Alternatively, the relation list for obtaining each image signal value and LCD signal value can also be detected by other means, please join
It reads shown in Fig. 8, Fig. 8 shows a kind of detection mode and obtains the flow chart of the relation list, firstly, the screen tune that will test
Red, complete green or complete blue picture (step S801) is helped, then, is shielded under entirely red, complete green or complete blue picture using detection instrument detection
The corresponding excitation light intensity angle value (step S802) of each image signal value 0-255 of curtain, furthermore, it is calculated according to excitation light intensity angle value
Corresponding LCD signal value (step S803) is obtained, finally, establishing the relation list (step of each image signal value and LCD signal value
Rapid S804).In above-mentioned detection mode, it is also possible to that detection instrument is directly utilized to detect red, complete green or full indigo plant picture sub-screen entirely
The corresponding LCD signal value of each image signal value 0-255, so avoid subsequent calculating step.
It please refers to shown in Fig. 9, is the system block diagram of the excitating light strength control system in the third embodiment of the invention,
The excitating light strength control system 4 includes light source 40, optical modulator 41, Fluorescence chip 42 and controller 43, with the first
Embodiment is different, and in present embodiment, controller 43 is outside one's consideration except the excitation light intensity that control optical modulator 41 is emitted, also control light
The excitating light strength that source 40 is emitted.Certainly, the excitating light strength control system 4 in present embodiment can also be in light source 40 and light
It include a relay system (not shown) between modulator 41, in addition, the excitating light strength control system 4 in present embodiment uses
Timing goes out the mode of light.
It please refers to shown in Figure 10, to excite red, green, blue for identical image signal value 255 (i.e. sub-pixel value 255)
Required excitating light strength comparison diagram.It can be seen from the chart, for identical image signal value 255, excite red, green, blue
Required excitating light strength is significantly different, wherein excitating light strength needed for excitation green light is up to I, is excited needed for feux rouges
Excitating light strength be about 0.5 times, i.e. 0.5I of green light, excitating light strength needed for exciting blue light is about the 0.3 of green light
Times, i.e. 0.3I.It therefore, in the present embodiment, can be according to specific picture signal in the case where going out light for red, green, blue timing
Value and corresponding fluorescent powder response curve data, the corresponding excitating light strength for controlling light source 40 and being emitted.In the present embodiment,
For according in same timing all image signal values Maximum constraint light source 40 be emitted excitating light strength, for example, a certain
Feux rouges goes out in light sequential, according to the maximum value in the image signal value for corresponding to all red sub-pixels points in the timing, controls light source
The excitating light strength of 40 outgoing.Light source 40 be emitted excitating light strength be conditioned in the case where, the controller 43 again according to
According to the signal value of specific image signal value control optical modulator 41, thus the excitating light strength that control is emitted from optical modulator 41.
For example, going out in light sequential in a certain feux rouges, for the image signal value 20 of specific red sub-pixels point, the controller 43 is controlled
The corresponding signal value of optical modulator 41 processed is 20, and is directed to the image signal value 255 of specific red sub-pixels point, the control
It is 255 that device 23, which controls the corresponding signal value of optical modulator 41,；Go out in light sequential in green light, for the green sub-pixel point of a specific G
Image signal value 100, it is 100 that the controller 43, which controls the corresponding signal value of optical modulator 41, and green for specific one
The image signal value 255 of sub-pixel point, it is 255 that the controller 43, which controls the corresponding signal value of optical modulator 41,；Go out in blue light
In light sequential, for the image signal value 50 of specific one blue sub-pixel point, it is corresponding that the controller 43 controls optical modulator 41
Signal value be 50, and for the image signal value 250 of specific one blue sub-pixel point, the controller 43 controls optical modulator
41 corresponding signal values are 250.Therefore, either which goes out in light sequential, and for image signal value 0-255, controller 43 is equal
The signal value that optical modulator 41 need to only be controlled mutually should be 0-255.
In conclusion excitating light strength control system provided in an embodiment of the present invention and optical projection system, according to original image
The excitating light strength that data and the fluorescent material/scattering material specifically used are emitted optical modulator and/or light source is controlled
System, not only ensure that the image for being emitted to screen is undistorted, and improve optical energy utilization efficiency.
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 (15)
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 at least light source, the imaging section includes at least optical modulator and color conversion element, the exciting light being emitted from the light source
The optical modulator is imported into be modulated, color conversion element described in the excitation through ovennodulation generate polychrome by
Laser, is arranged multiple pixels on the color conversion element, and each pixel includes 1 sub-pixel points, and every kind
Sub-pixel point is coated with by corresponding phosphor material powder to be formed, and the control unit is for receiving raw image data, according to corresponding
The excitation of the excitating light strength of the outgoing of optical modulator described in the response curve state modulator of fluorescent powder or the control light source outgoing
Luminous intensity.
2. excitating light strength control system as described in claim 1, which is characterized in that the color conversion element is fluorescent core
Piece.
3. excitating light strength control system as described in claim 1, which is characterized in that the illumination portion further includes a relaying system
System, the relay system are placed between the light source and the optical modulator.
4. excitating light strength control system as described in claim 1, which is characterized in that the imaging section further includes dichroic
Piece, the dichroic piece are set between the optical modulator and the color conversion element, for transmiting by the light modulation
The stimulated light that the exciting light of device outgoing feeds them into color conversion element and reflection is emitted by the color conversion element, or it is anti-
It penetrates to be fed them into color conversion element by the exciting light that the optical modulator is emitted and transmitted and be emitted by the color conversion element
Stimulated light.
5. excitating light strength control system as described in claim 1 or 4, which is characterized in that the imaging section further includes setting
Polarization spectroscope after the optical modulator, the polarization spectroscope are used to swash what is come out from the optical modulator
It shines and is separated into the first polarised light and the second polarised light, wherein second polarised light is converted into first partially in the imaging section
It is emitted after vibration light from the imaging section.
6. excitating light strength control system as claimed in claim 5, which is characterized in that the light source is emitted blue laser, described
The second polarised light that blue laser obtains after the polarization spectroscope is converted into the first polarised light by the imaging section, it is described at
First polarised light and/or other at least one color of light as the blue laser of portion's outgoing.
7. excitating light strength control system as claimed in claim 6, which is characterized in that imaging section further includes being set to described two
Quarter wave plate between color chips and the color conversion element.
8. excitating light strength control system as claimed in claim 7, which is characterized in that each on the color conversion element
Pixel includes blue sub-pixel point, wherein coating polarization-maintaining scatters powder on the indigo plant sub-pixel point.
9. excitating light strength control system as described in claim 1 or 4, which is characterized in that the light source is emitted UV light.
10. excitating light strength control system as described in claim 1, which is characterized in that the control element is according to the original
The response curve parameter of the image signal value of beginning image data and the fluorescent powder being coated on the color conversion element
The signal value of the optical modulator is calculated, and further controls the excitating light strength of the light source outgoing according to the signal value.
11. excitating light strength control system as described in claim 1, which is characterized in that the excitating light strength control system
For timing light extraction mode, in going out in light sequential for each specific light, the control unit is according to the figure of the raw image data
As the response curve state modulator institute of signal value and the corresponding fluorescent powder being coated on the Fluorescence chip of the specific light
State the excitating light strength of light source outgoing.
12. excitating light strength control system as claimed in claim 11, which is characterized in that the controller is also according to the original
The image signal value of beginning image data controls the signal value of the optical modulator.
13. excitating light strength control system as claimed in claim 12, which is characterized in that the corresponding raw image data
Image signal value 0-255, the signal value that the controller controls the optical modulator correspond to 0-255.
14. excitating light strength control system as described in claim 1, which is characterized in that the optical modulator is LCD light modulation
Device.
15. a kind of optical projection system, which is characterized in that the optical projection system includes the exciting light as described in claim 1-14 is any
Intensity control system and projection lens, the exciting light being emitted from the excitating light strength control system are thrown through the projection lens
It is incident upon screen, color image is presented.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710349594.0A CN108957922B (en) | 2017-05-17 | 2017-05-17 | Excitation light intensity control system and projection system |
| PCT/CN2017/094801 WO2018209812A1 (en) | 2017-05-17 | 2017-07-28 | Excitation light intensity control system and projection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710349594.0A CN108957922B (en) | 2017-05-17 | 2017-05-17 | Excitation light intensity control system and projection system |
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| Publication Number | Publication Date |
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| CN108957922A true CN108957922A (en) | 2018-12-07 |
| CN108957922B CN108957922B (en) | 2020-12-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710349594.0A Active CN108957922B (en) | 2017-05-17 | 2017-05-17 | Excitation light intensity control system and projection system |
Country Status (2)
| Country | Link |
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| CN (1) | CN108957922B (en) |
| WO (1) | WO2018209812A1 (en) |
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| CN108957922B (en) | 2020-12-18 |
| WO2018209812A1 (en) | 2018-11-22 |
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