CN206321932U - A kind of projection display system - Google Patents
A kind of projection display system Download PDFInfo
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- CN206321932U CN206321932U CN201621408142.2U CN201621408142U CN206321932U CN 206321932 U CN206321932 U CN 206321932U CN 201621408142 U CN201621408142 U CN 201621408142U CN 206321932 U CN206321932 U CN 206321932U
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Abstract
The utility model protects a kind of projection display system, including：For the light-emitting device according to the light of sequential outgoing first and the second light；Light-dividing device, for the first light to be divided into the first wave length scope light along the first light path outgoing and the second wave length scope light along the second light path outgoing, and guides at least part light of the second light along the first light path outgoing；First optical modulator is used to modulate the light along the first light path outgoing, second optical modulator is used to modulate the light along the second light path outgoing, after the first light modulator modulates the light of outgoing with after the second light modulator modulates the actinic light of outgoing obtain the 3rd light along the 3rd light path outgoing；3rd optical modulator is located in the light path between light-emitting device and light-dividing device, and the first light and the second light of light-emitting device outgoing are modulated, or the 3rd optical modulator is located in the 3rd light path, and the 3rd light is modulated.The projection display system improves imaging effect, reduces light loss, and simplifies closing light light path, reduction design complexities.
Description
Technical field
The utility model is related to field of projection display, more particularly to a kind of projection display system.
Background technology
In the prior art, projector equipment is entered using list LCD (Liquid Crystal Display, liquid crystal display) system
Row image procossing, or image procossing is carried out using 3LCD systems.
When carrying out image procossing using single LCD system, red, green, blue three coloured light by LCD processing, obtains RGB in turn
Three images, the coloured image shown at human eye according to required for synthesizing the persistence of vision, under the technical scheme, image it is aobvious
Show that quality is very low, for example, the low problem of flicker, brightness occurs.
When carrying out image procossing using 3LCD systems, same time, each LCD only handles a kind of color of light, Ran Houhe
Outgoing obtains coloured image after light, and equivalent to three LCD have carried out parallel connection.Although the technical scheme solves image flicker and bright
The problem of spending low, but the contrast of the contrast of image and single LCD system is not almost distinguished, consuming high cost does not have but
Gratifying display effect is brought, suitable for application in high-end in the market.
As shown in figure 1, being the light channel structure schematic diagram of projection display system of the prior art, white light W is through wavelength light splitting
Device is divided into gold-tinted Y and blue light B, and wherein gold-tinted Y is further split into feux rouges R and green glow G, blue light B, green glow G and feux rouges R difference
Incide on LCD1, LCD2 and LCD3, bluish-green red respective image three-colo(u)r light is formed after LCD modulation treatments, then through X-Cube
Image is formed on screen by projection lens after closing light.In the technical scheme, always there is the light of a color (red in such as figure
Light R) optical length of the light path compared with other two-beams, by way of lens it is more, cause that the light loss of the light is big, image quality is poor.
In addition, in the technical scheme, X-Cube is using four triangular prism splicings, the surface that each triangular prism is contacted with other triangular prisms
Plated film is needed, plated film is difficult, and each have gap between splicing prism, further result in light loss.To sum up a variety of factor shadows
Ring, cause the display effect of 3LCD projection display system not good.
Therefore, a kind of higher display effect projection display system is urgently developed.
Utility model content
For the low defect of the projection display system contrast of above-mentioned prior art, the utility model provides one kind and can carried
For the projection display system of more high-contrast, including：
Light-emitting device, for the first light and the second light according to sequential outgoing different colours；Light-dividing device, for by described
One light is divided into the first wave length scope light along the first light path outgoing and the second wave length scope light along the second light path outgoing, is additionally operable to
At least part light of second light is guided along the first light path outgoing；First optical modulator, in first light path, is used for
Modulate the light along the first light path outgoing, the second optical modulator, in second light path, for modulating along the second light path outgoing
Light, the light of outgoing and the actinic light of the outgoing after second light modulator modulates are obtained after first light modulator modulates
To the 3rd light along the 3rd light path outgoing；3rd optical modulator, the light between the light-emitting device and the light-dividing device
Lu Shang, is modulated for the first light and the second light to the light-emitting device outgoing；Or the 3rd optical modulator be located at it is described
In 3rd light path, for being modulated to the 3rd light.
In one embodiment, first light is gold-tinted, and second light is blue light, the first wave length scope light
For feux rouges or green glow.
In one embodiment, the light-dividing device is additionally operable to being divided into second light into along the first light path outgoing
Wavelength range light and the 4th wave-length coverage light along the second light path outgoing.
In one embodiment, first light is gold-tinted, and second light is green light, the first wave length scope light
For feux rouges, the second wave length scope light is green glow, and the wavelength range light is blue light, and the 4th wave-length coverage light is
Green glow；Or first light is gold-tinted, second light is magenta light, and the first wave length scope light is feux rouges, described the
Two wave-length coverage lights are green glow, and the wavelength range light is feux rouges, and the 4th wave-length coverage light is blue light.
In one embodiment, the light-dividing device is additionally operable to second light being divided into respectively along first light path
With the light of two beam same colors of the second light path outgoing.
In one embodiment, the light-dividing device includes color-selective polarization device and polarizing beam splitter, the color
Selection polarizer is used for the first wave length scope light and the second polarization state that first light is converted to the first polarization state
The closing light of the second wave length scope light, the polarizing beam splitter is used to being divided into the closing light into the first wave along the first light path outgoing
Long scope light and the second wave length scope light along the second light path outgoing.
In one embodiment, also including control device, the open and close for controlling the light-emitting device so that
During the optical modulator is in rising edge or trailing edge, light-emitting device is closed.
In one embodiment, the equivalent optical path of first light path and second light path.
In one embodiment, first optical modulator and second optical modulator be transmission liquid crystal light valve,
One kind in reflective liquid crystal light valve and digital micro-mirror device, the 3rd optical modulator is transmission liquid crystal light valve, reflective
One kind in liquid crystal light valve and digital micro-mirror device.
In one embodiment, first optical modulator and second optical modulator are digital micro-mirror device, and
First optical modulator and second optical modulator are located in the emergent light light path of the 3rd optical modulator；Or it is described
3rd optical modulator is digital micro-mirror device, and the 3rd optical modulator is located at first optical modulator and second light
In the emergent light light path of modulator.
Compared with prior art, the first light of the different colours that the utility model sends light-emitting device and the second light when
Sequence light is divided into the emergent light along the first light path and the second light path by light-dividing device, by the first light modulator modulates along the first light
The light on road, the light by the second light modulator modulates along the second light path, then by the first optical modulator and the second optical modulator
The light of outgoing light compositing the 3rd, while the 3rd optical modulator to be arranged to the light between the light-emitting device and the light-dividing device
Lu Shang, is modulated to the light of the light-emitting device outgoing, or the 3rd optical modulator is arranged in the 3rd light path, is used
It is modulated in the 3rd light.Hereby it is achieved that following beneficial effect：In the case of using only three optical modulators, both made
The light of each color is obtained all by two light modulator modulates, to add the contrast range of projection display system, is caused again each
The equivalent optical path of the light of color, to improve imaging effect, reduce light loss, also simplify closing light light path, reduction design multiple
Miscellaneous degree.
Brief description of the drawings
Fig. 1 is the light channel structure schematic diagram of projection display system of the prior art.
Fig. 2 is the structural representation of an embodiment of the utility model projection display system.
Fig. 3 be Fig. 2 embodiments in light-emitting device emergent light timing diagram.
Fig. 4 be Fig. 2 embodiments in light-emitting device structural representation.
Fig. 5 is the structural representation of the Wavelength converter of the light-emitting device shown in Fig. 4.
Fig. 6 is the timing diagram cut-off with the switch of light-emitting device of optical modulator.
Fig. 7 is the structural representation of another embodiment of the utility model projection display system.
Fig. 8 is the structural representation of another embodiment of the utility model projection display system.
Fig. 9 is the structural representation of another embodiment of the utility model projection display system.
Figure 10 is the structural representation of another embodiment of the utility model projection display system.
Figure 11 is the structural representation of another embodiment of the utility model projection display system.
Figure 12 is the structural representation of another embodiment of the utility model projection display system.
Figure 13 is the structural representation of another embodiment of the utility model projection display system.
Embodiment
For in the projection display system of prior art, three optical modulators " parallel connection " and the contrast brought it is not high, one
The problems such as coloured light loss is excessive is planted, the utility model is changed the relation of three optical modulators.Master of the present utility model
Want inventive concept, be exactly that two optical modulators are subjected to " parallel connection ", then by the optical modulator of this pair " parallel connection " again with addition
One optical modulator carries out " series connection ".By the technical scheme, in the case where not increasing cost, projection display system is improved
Display effect, be a kind of economical and practical technical scheme.
So-called " parallel connection of optical modulator " is that light beam is divided into two-beam, makes two-beam respectively through two light modulations
Closing light again after device modulation；So-called " series connection of optical modulator " is to make light beam successively by two optical modulators.
In projection display system of the present utility model, any coloured light all at least through two optical modulators modulation then
Outgoing, if adjustable tonal range of previous optical modulator is 0~N1, adjustable tonal range of latter optical modulator
For 0~N2, then incite somebody to action both " series connection " so that light first passes through previous optical modulator, then by latter optical modulator, then whole system
The adjustable tonal range of system is changed into 0~N1 × N2, adds the dynamic range of projection display system, reduces minimum brightness list
Position, substantially increases the display effect and contrast of projection display system.
Moreover, two optical modulators are only carried out " parallel connection " by the utility model, it is to avoid three light modulations in the prior art
The problem of light loss of a certain light that light path during device " parallel connection " is inconsistent and brings is excessive, image quality is poor；Avoid three tunnels
The problem of Multiplexing apparatus designs complexity, has additional light loss during actinic light.
In the utility model, " light path upstream " refers to along the position of the relatively close light emitting source of optical path direction, and " optical path downstream " refers to
Along the position of the relatively close exit end of optical path direction.
The utility model embodiment is described in detail with embodiment below in conjunction with the accompanying drawings.
Such as relating to the description of " first ", " second ", " the 3rd " etc. is only used for describing purpose in the utility model, in order to
Description is convenient, and it is not intended that indicating or implying its relative importance or the implicit number for indicating indicated technical characteristic
Amount.Thus, at least one this feature can be expressed or implicitly include by defining " first ", " second ", the feature of " the 3rd ".
Fig. 2 is referred to, Fig. 2 is the structural representation of an embodiment of the utility model projection display system.Projection Display
System 10 includes light-emitting device 110, light-dividing device 120, the first optical modulator 131, the second optical modulator 132, the 3rd light modulation
Device 133 and Multiplexing apparatus 140.
In the present embodiment, the first light and the second light of the outgoing of light-emitting device 110 are incided on the 3rd optical modulator 133, warp
After the modulation of 3rd optical modulator 133, the first light and the second light incide light-dividing device 120.120 pair of first light of light-dividing device is according to ripple
Long scope carries out light splitting, is divided into the first wave length scope light and the second ripple along the second light path outgoing along the first light path outgoing
Long scope light, and light-dividing device 120 also guides at least part light of the second light along the first light path outgoing.First optical modulator
131 are located in the first light path, and at least part light of first wave length scope light and the second light incides the first light along the first light path to be adjusted
Device 131 processed is simultaneously modulated by it；Second optical modulator 132 is located in the second light path, and second wave length scope light is incident along the second light path
Modulated to the second optical modulator 132 and by it.Through the first optical modulator 131 modulate after outgoing light with through the second optical modulator
The light of outgoing closing light at Multiplexing apparatus 140, obtains the 3rd light along the 3rd light path outgoing after 132 modulation.3rd light is through throwing
The equipment such as shadow camera lens are projected on screen, form display image.Each device is described one by one below.
<Light-emitting device>
Light-emitting device 110 is used for the first light and the second light according to sequential outgoing different colours, in the present embodiment, such as Fig. 3
It is shown, light-emitting device 110 according to timing cycles the smooth gold-tinted of outgoing first and the second smooth blue light.The structure of light-emitting device 110 is shown
It is intended to as shown in figure 4, including luminescence unit 111 and Wavelength converter 112, luminescence unit 111 sends exciting light, and exciting light enters
Wavelength converter 112 is mapped to, Wavelength converter 112 is moved under the driving of drive device, makes its different zones in difference
Time exposed to exciting light irradiation under, so as to produce the first smooth gold-tinted and the second smooth blue light of sequential.
Luminescence unit 111 is a LASER Light Source, and a specially diode laser matrix light source is arranged in array by many
Laser diode is constituted, and the light source has the advantages that the angle of divergence is small, electro-optical efficiency is high, monochromaticjty is good etc., suitable for high brightness
The application such as display.In other embodiment of the present utility model, luminescence unit can also be the laser diode of single, may be used also
To be solid state laser light source, LED light source or LED array light source are can also be, the technical scheme of subsequent optical path system is not influenceed
Implement.
The structural representation of Wavelength converter 112 is as shown in figure 5, Wavelength converter 112 includes two regions：Gold-tinted
Region Y and blue region B, for receiving the light that luminescence unit 111 is sent, and the smooth gold-tinted of outgoing first and the second light are blue respectively
Light.In the present embodiment, the light that luminescence unit 111 is sent is blue light, correspondingly, and yellow region Y is yellow fluorescence region, comprising
Yellow fluorescent material (such as, but not limited to YAG:Ce fluorescent material), blue light can be absorbed and the gold-tinted of wide spectrum is converted into
(spectral region covers red color segment and green segment)；Blue region B be regional transmission, the blue light that luminescence unit 111 is sent transmitted through
Blue region B, forms the second smooth blue light.In an embodiment of the present utility model, blue region B includes scattering material,
For the light distribution for the blue light for changing incidence, make it more uniform, and to blue light progress eliminating coherence (if blue light is laser).
It is appreciated that in another embodiment of the present utility model, the emergent light of luminescence unit can also be other light
The light of spectrum, such as but is not limited to ultraviolet light；Two regions of Wavelength converter can also all be wavelength conversion region, to incident light
Carry out wavelength convert；In addition, two regions of Wavelength converter can also be the region of other color of light of outgoing.
In the present embodiment, Wavelength converter 112 is colour wheel, around its axis under the driving of drive device (such as motor)
Rotate.In another embodiment of the present utility model, Wavelength converter can also be color bucket/color tin, including along bucket/cylinder face
Around multiple regions of distribution, color bucket/color cylinder swashs around the rotation of its axis direction so that the plurality of region is according to timing cycles
Under luminous irradiation；Or, Wavelength converter can also be colour table, including multiple areas that direction is arranged successively along a straight line
Domain, colour table is along the rectilinear direction linear oscillator, so that the plurality of region is according to timing cycles under the irradiation of exciting light.
Light-emitting device 110 in the present embodiment is the light-emitting device that luminescence unit 111 is combined with Wavelength converter 112,
Using the motion of Wavelength converter 112 according to the light of sequential outgoing first and the second light, be only it is a kind of specifically can embodiment, its
Advantage is that once set at the motion week of angle and Wavelength converter 112 shared by each region of Wavelength converter 112
Phase, you can the sequential of the first light of control and the second light, without complicated Electronic Control.It is appreciated that due to of the present utility model
The effect of light-emitting device is the first light and the second light for producing sequential, and in other embodiments, light-emitting device can also be
Other can arbitrarily realize the device of the function.For example：Light-emitting device can be comprising the luminous of multiple transmitting different colours light
The device in source, the plurality of light emitting source is opened and closed under control of the control means, so that according to the light of sequential outgoing first and second
Light.
In further embodiments of the present utility model, light-emitting device can also be on the basis of the light-emitting device shown in Fig. 4
Increase supplement light source, such as, including luminescence unit and supplement light source, the light that wherein luminescence unit is sent passes through Wavelength converter
Produce the sequential light of different colours, the sequential actinic light that the light that supplement light source is sent is sent with Wavelength converter, so as to obtain
According to the first light and the second light of the different colours of sequential outgoing.Here, the light and luminescence unit that supplement light source is sent can both have been made
The light sent closing light before Wavelength converter is incided, and together incide Wavelength converter；It can also turn in wavelength
After changing device light extraction, the actinic light for making the light that supplement light source is sent be sent with Wavelength converter.In an instantiation,
Luminescence unit sends blue light, and Wavelength converter includes gold-tinted light extraction region and blue light light extraction region, and supplement light source is feux rouges, from
And the light that light-emitting device is sent is the first smooth gold-tinted (or orange light) and the second smooth magenta light of sequential, the technical scheme can be improved
The feux rouges display effect of projection display system.
<Light-dividing device>
In the present embodiment, light-dividing device 120 is dichroic piece, reflection first wave length scope light and the second light, and transmits the
Two wave-length coverage lights.It is appreciated that in another embodiment of the utility model, by the way that light path is exchanged, can also set
Penetrate first wave length scope light and the second light and reflect the dichroic piece of second wave length scope light.Dichroic piece can be in transparent base
Device of multilayer dielectric film etc. is coated with plate.
In the outgoing light direction of light-dividing device 120, i.e. the first light path and the second light path, it can also set anti-as shown in the figure
Mirror is penetrated, for being guided to light path, can also further increase the optical element (not shown) such as lens.
<Optical modulator>
In the present embodiment, during a two field picture, the 3rd optical modulator 133 is according to the related data of the image respectively to hair
The first light and the second light of the outgoing of electro-optical device 110 are modulated.Specifically, processor will be related to the first light color in the image
Data handled, the first light modulating signal of generation is simultaneously conveyed to the 3rd optical modulator, processor by the image with second
The related data of light color are handled, and are generated the second light modulating signal and are conveyed to the 3rd optical modulator, the 3rd optical modulator
The first light and the second light are modulated respectively according to the modulated signal of input.Should during, the 3rd optical modulator 133 is by incidence
To an equally distributed light of its plane of incidence, the uneven light of the spatial distribution of the exit facet of the 3rd optical modulator 133 is converted to
(in the case of image ninsolid color image).The first light and the color of the second light sent due to light-emitting device is different, therefore warp
3rd optical modulator 133 is modulated, and the first light and the second light of sequential outgoing are modulated into the first monochrome in sequential priority outgoing
Image and the second monochrome image.The uniform light of the optical modulator plane of incidence is referred to as " illumination light ", the space point of optical modulator exit facet
The uneven light of cloth is referred to as " image light " (meaning figuratum light).It is uniform to obtain in the embodiment of the utility model one
Illumination light, light balancing device, light beam can also be included between the optical modulator 133 of light-emitting device 110 and the 3rd and reduce/enlarge device
Deng other optics, such as diffusion sheet, lens group, speculum group, here is omitted.
Then, the light of the outgoing of the 3rd optical modulator 133 device 120 that is split is divided into after two-beam and is imaged onto the first light respectively
The plane of incidence of the optical modulator 132 of modulator 131 and second.Specifically, the first of the outgoing of the 3rd optical modulator 133 the smooth gold-tinted is through dividing
The light splitting of electro-optical device 120, forms the feux rouges of first wave length scope and the green glow of second wave length scope.Can be the 3rd optical modulator
The first monochrome image (yellow image) of 133 exit facets regards two images as --- the superposition of red image and green image, then
They are imaged onto the plane of incidence of the first optical modulator 131 and the second optical modulator 132 from the exit facet of the 3rd optical modulator 133 respectively
The plane of incidence.The second monochrome image (blue image) that second smooth blue light of the outgoing of the 3rd optical modulator 133 is formed in exit facet, warp
Light-dividing device 120 is along the first light path imaging to the plane of incidence of the first optical modulator 131.
When first wave length scope light and the second light incide the first optical modulator 131, the first optical modulator 131 is according to same
Related data in one image is modulated to first wave length scope light and the second light respectively；When second wave length scope light is incided
During the second optical modulator 132, related data of second optical modulator 132 in same image is carried out to second wave length scope light
Modulation.Same image herein, refers to the first optical modulator, the second optical modulator and the 3rd optical modulator during a two field picture
Modulation instructions to the modulation institute foundation of its incident light are based on same image data source, and the image data source at least includes red green
The view data of blue each color component.For example, red component image data of first optical modulator 131 in image data source
First wave length scope light is modulated, green component image of second optical modulator 132 in same image data source
Data are modulated to second wave length scope light, red and green component of the 3rd optical modulator 133 in image data source
View data is modulated to the first light.
Specifically, in one embodiment, for each pixel, the 3rd optical modulator 133 should according to image data source
The larger color of gray value is modulated in the red and green of pixel.If a pixel is only single red or green, then
3rd optical modulator 133 directly coordinates the first optical modulator 132 or second empty according to the red or green gray value of the pixel
Between the synchronous modulation of optical modulator 132 so that the brightness that the pixel is finally shown is consistent with the gray value of the frame image data.It is false
If a pixel is red and green secondary colour, the 3rd optical modulator 133 is according to gray value is larger in red and green one
It is individual to be modulated, and the first optical modulator 132 of cooperation or the synchronous modulation of second space optical modulator 132 cause the gray scale of the pixel
The brightness that the larger color of value is shown is consistent with the gray value of the color of the frame image data；It is less simultaneously for gray value
Color, by obtaining red and green gray value ratio, adjusts corresponding first optical modulator of the color or second accordingly
The light percent of pass (reducing light percent of pass as appropriate) of optical modulator so that the color can finally be shown and the frame image data
The gray value being consistent.
In the present embodiment, the first optical modulator 131, the second optical modulator 132 and the 3rd optical modulator 133 are all transmissions
Formula liquid crystal light valve LCD, the light light transmittance of each pixel is controlled by adjusting the liquid crystal arrangement direction in LCD.In the present embodiment
In, it is desirable to light-emitting device 110 provides polarised light, could be modulated by LCD.
Fig. 6 is referred to, due to in each two field picture modulated process, cut-offfing for LCD has a rising edge and one
Trailing edge, in rising edge or trailing edge, optical modulator is not modulated to light, causes the waste of light, and may cause projection
The contrast reduction of display system.In an embodiment of the present utility model, projection display system also includes control device,
Open and close for controlling light-emitting device, light-emitting device is then turned on after LCD is fully opened, when LCD is begun to shut off
Light-emitting device is closed, so that light-emitting device is closed during LCD rising edge and trailing edge, energy has both been saved
Source, turn avoid contrast reduction.DMD (Digital Micromirro Device, digital micro-mirror device) etc. is other kinds of
Optical modulator equally exists rising edge and trailing edge, and the open and close of light-emitting device can be controlled by control device, so that
When optical modulator is in rising edge or trailing edge device, light-emitting device is closed.
<Multiplexing apparatus>
Modulation through the first optical modulator 131 and the second optical modulator 132 and the image light of outgoing, incide Multiplexing apparatus
140, overlap and be combined into a branch of colored light of image light the 3rd, projected through follow-up light path on screen, so as to realize that image shows
Show.In the present embodiment, Multiplexing apparatus 140 is spliced for two right-angle prisms, and ripple is coated with by closing on face in two right-angle prisms
Long selective membrane so that light transmission and so that the light reflection from the second optical modulator 132 from the first optical modulator 131.Should
The technical scheme (namely using Multiplexing apparatus of 4 triangular prism splicings) of compared to three optical modulators " parallel connection " of structure is significantly simple
Change, reduce faying face and handing-over is stitched, decrease plated film area, simplified structure.Further, the two of Multiplexing apparatus 140
Closing between face for individual right-angle prism has air-gap, in favor of the realization of the function of wavelength selective membrane.
In another embodiment of the present utility model, Multiplexing apparatus includes polarization spectro piece, the polarization spectro piece energy
Enough polarization states according to incident light carry out light splitting closing light.Make the first optical modulator and the light of the second optical modulator outgoing by setting
Polarization state is different (such as one is S light, and one is P light), it is possible to achieve the closing light of the image light of both outgoing.
In the present embodiment, the illumination light for carrying out selfluminous device 110 passes through the 3rd optical modulator 133, is further divided into two-beam point
Not Jin Ru the first optical modulator 131 and the second optical modulator 132, be then combined into again a branch of.During being somebody's turn to do, any color
The light path of light is all equal (not considering the optical path difference problem brought the light velocity because of the light of different wave length in media as well is different), namely
The imaging process of the light of any color is essentially identical, and relay imaging device is additionally increased and band in the absence of because of a certain color of light
The problem of coming.Moreover, the light of any color is all respectively through two optical modulators, such as the 3rd optical modulator 133 and first
Optical modulator 131, or the 3rd optical modulator 133 and the second optical modulator 132 so that the contrast range of display image is significantly
Increase so that the projection display system can realize that HDR (High-Dynamic Range, HDR) is shown.So as to,
In the case of not increasing cost, image display effect greatly improved.Further, since in the utility model, the light of light path upstream
The image light of modulator (the 3rd optical modulator 133 in such as the present embodiment) exit facet is imaged onto the optical modulator of optical path downstream
The plane of incidence of (the first optical modulator 131 and the second optical modulator 132 in such as the present embodiment), therefore only each color of light light path
In the case of equal, the pixel modulating unit of the optical modulator of the optical path downstream image light essence incident with its plane of incidence just can guarantee that
Quasi- correspondence, just can guarantee that image quality.Specifically, the equivalent optical path of the first light path and the second light path, i.e., each color of light is from light splitting
The Exit positions of device are to the equivalent optical path (light path be the 3rd light path) after closing light between the position of closing light again.
In another embodiment of the present utility model, the first light is gold-tinted, and the second light is blue light, first wave length scope light
For green glow, during second wave length scope light is feux rouges, the technical scheme, the first optical modulator is modulated to green glow and blue light, and
Second optical modulator is modulated to feux rouges.Because the fuel factor of feux rouges is stronger with respect to blue light and green glow so that modulation feux rouges
Optical modulator heat production is more, easily influences the service life of the optical modulator.The setting of present embodiment causes the few indigo plant of heat production
Light and green glow are by a light modulator modulates, and the feux rouges more than heat production has shared the production of heat by another light modulator modulates
It is raw so that the service life extension of projection display system.It is additionally, since when the first optical modulator is modulated to blue light, uses
Idle state is in the second optical modulator of modulation feux rouges, the second optical modulator can be made more fully to radiate.
In embodiment of above, light-dividing device has only carried out light splitting to the first light, and does not carry out light splitting to the second light so that
There is free time in the second optical modulator.In following embodiments of the present utility model, light-dividing device is divided the second light
Light, is divided into the wavelength range light and the 4th wave-length coverage along the second light path outgoing along the first light path outgoing by the second light
Light.
In an embodiment of the present utility model, the first light is gold-tinted, and the second light is green light, first wave length scope light
For feux rouges, second wave length scope light is green glow, wherein the second smooth green light is split, device is divided into the 3rd along the first optical path direction
Wave-length coverage light blue light and the 4th wave-length coverage light green glow along the second optical path direction.In the technical scheme, the first light modulation
Device is modulated to feux rouges and blue light, and the second optical modulator is modulated to green glow, the technical scheme considerably increase green glow into
Point, because green glow is maximum to the white brightness contribution of projection display system, also just considerably increase the output of projection display system
Brightness.
In an embodiment of the present utility model, the first light is gold-tinted, and the second light is magenta light, first wave length scope
Light is feux rouges, and second wave length scope light is green glow.Second smooth magenta light be split device be divided into along the first optical path direction the 3rd
Wave-length coverage light feux rouges and the 4th wave-length coverage light blue light along the second optical path direction.In the technical scheme, the first light modulation
Device is modulated to feux rouges, and the second optical modulator is modulated to green glow and blue light.The technical scheme adds red color light component, gram
The defect of red display effect difference of projection display system in the prior art has been taken (especially because the red color light component in yellow fluorescence
Less, red light emitting phosphor efficiency is low).
In an embodiment of the present utility model, light-dividing device be used for by the second light be divided into respectively along the first light path and
The light of two beam same colors of the second light path outgoing, so as to shorten the modulation time of the second light, to improve projection display system
The luminous flux of unit interval output, and then improve the output intensity of projection display system.In a detailed embodiment,
One light is gold-tinted, and the second light is blue light, and first wave length scope light is feux rouges, and second wave length scope light is green glow.Wherein, the second light
Blue light be split device be divided into the first blue light along the first light path and the second blue light along the second light path (can be using polarization state point
Into the light of different polarization states, the beam of wavelength properties identical two can also be divided into using the reflection and refraction action of light-dividing device medium
Light).In the technical scheme, the first optical modulator and the second optical modulator are all modulated to blue light, when shortening blue light modulation
Between, so as to improve the luminous flux of the unit interval output of projection display system, improve the light intensity of projection display system.
Fig. 7 is referred to, Fig. 7 is the structural representation of another embodiment of the utility model projection display system.Projection is aobvious
Show that system 20 includes light-emitting device 210, light-dividing device 220, the first optical modulator 231, the second optical modulator 232, the 3rd light and adjusted
Device 233 and Multiplexing apparatus 240 processed.
In the present embodiment, light-emitting device 210 incides light splitting according to the first light and the second light of the different colours of sequential outgoing
Device 220,220 pair of first light of light-dividing device carries out light splitting according to wave-length coverage, is divided into the first wave along the first light path outgoing
Long scope light and the second wave length scope light along the second light path outgoing, and light-dividing device 220 also guides at least portion of the second light
Light splitting is along the first light path outgoing.First optical modulator 231 is located in the first light path, and first wave length scope light and the second light are at least
Part light incides the first optical modulator 231 along the first light path and modulated by it；Second optical modulator 232 is located at the second light path
On, second wave length scope light incides the second optical modulator 232 along the second light path and modulated by it.Through the first optical modulator 231
After modulation the light of outgoing with through the second optical modulator 232 modulate after outgoing light at Multiplexing apparatus 240 closing light, obtain along the 3rd
3rd light of light path outgoing.3rd optical modulator 133 is located in the 3rd light path, and the 3rd light of the outgoing of Multiplexing apparatus 240 is carried out
Modulation, afterwards, the 3rd light is projected on screen through the first-class equipment of projection lens, forms display image.
In the present embodiment, the illumination light for carrying out selfluminous device 210 is divided into two-beam and respectively enters the He of the first optical modulator 231
Second optical modulator 232, be then combined into again it is a branch of, then by the 3rd optical modulator 233.During being somebody's turn to do, with above-described embodiment one
Sample, the light path of the light of any color is all equal (not to be considered to bring the light velocity because of the light of different wave length in media as well is different
Optical path difference problem), namely the imaging process of the light of any color is essentially identical, additionally increases in the absence of because of a certain color of light
Plus relay imaging device and the problem of bring.Moreover, the light of any color is all respectively through two optical modulators, such as first
The optical modulator 233 of optical modulator 231 and the 3rd, or the second optical modulator 232 and the 3rd optical modulator 233 so that display figure
The contrast range of picture is greatly increased so that the projection display system can realize that HDR is shown.So as to not increase cost
In the case of, image display effect greatly improved.Further, since in the utility model, optical modulator (such as this reality of light path upstream
Apply the first optical modulator 231 and the second optical modulator 232 in example) image light of exit facet is imaged onto the light modulation of optical path downstream
The plane of incidence of device (the 3rd optical modulator 233 in such as the present embodiment), therefore in the case of only each color of light equivalent optical path,
It can guarantee that the pixel modulating unit of the optical modulator of the optical path downstream image light incident with its plane of incidence is precisely corresponding, just can guarantee that
Image quality.
Compared with the embodiment shown in above-mentioned Fig. 2, the difference of this case is that the 3rd optical modulator 233 is adjusted positioned at the first light
After the optical modulator 232 of device 231 and second processed rather than in light path before.In the technical scheme, the light that light-emitting device is sent point
Incide two different optical modulators after into two-way, it is modulated after obtain the image light of remitted its fury, image light re-incident
It is modulated to the 3rd optical modulator so that the heat production of three optical modulators is more uniform, slow down optical modulator because of fuel factor
Caused by aging, so as to extend the service life of optical modulator.By contrast, in the technical scheme of Fig. 2 embodiments, light
The light that device is sent directly fully incides the 3rd optical modulator first so that the quantity of heat production of the 3rd optical modulator is much big
In the first optical modulator and the second optical modulator, the aging speed of the 3rd optical modulator can be caused faster.
In the present embodiment, the characteristic such as light-emitting device, light-dividing device, Multiplexing apparatus, structure function of optical modulator and each
The color selection for planting light (such as the first light, the second light, first wave length scope light, second wave length scope light ...) refers to above-mentioned reality
Apply the description in mode.
Fig. 8 is referred to, Fig. 8 is the structural representation of another embodiment of the utility model projection display system.Projection is aobvious
Show that system 30 includes light-emitting device 310, light-dividing device 320, the first optical modulator 331, the second optical modulator 332 and the 3rd light and adjusted
Device 333 processed.
In the present embodiment, the first light and the second light of the outgoing of light-emitting device 310 are incided on the 3rd optical modulator 333, warp
After the modulation of 3rd optical modulator 333, the first light and the second light incide light-dividing device 320.320 pair of first light of light-dividing device is according to ripple
Long scope carries out light splitting, is divided into the first wave length scope light and the second ripple along the second light path outgoing along the first light path outgoing
Long scope light, and light-dividing device 320 also guides at least part light of the second light along the first light path outgoing.First optical modulator
331 are located in the first light path, and at least part light of first wave length scope light and the second light incides the first light along the first light path to be adjusted
Device 331 processed is simultaneously modulated by it；Second optical modulator 332 is located in the second light path, and second wave length scope light is incident along the second light path
Modulated to the second optical modulator 332 and by it.Through the first optical modulator 331 modulate after outgoing light with through the second optical modulator
The light of outgoing closing light at light-dividing device 320, obtains the 3rd light along the 3rd light path outgoing after 332 modulation.3rd light is through throwing
The equipment such as shadow camera lens are projected on screen, form display image.
Compared with the embodiment shown in above-mentioned Fig. 2, difference in this case is that, the first optical modulator 331 and the second light
Modulator 332 replaces with digital micro-mirror device DMD, and the optical modulator is in ON states and OFF shapes by controlling each micro mirror
The time accounting of state adjusts the gray value of the micro mirror respective pixel.In the present embodiment, the light that light-emitting device 310 is sent is first passed through
LCD light modulator modulates, are then divided into two-way respectively by two DMD light modulator modulates.Light is controlled relative to LCD optical modulators
Transmissivity control to light be directed to non-exit channel under the light and shade of image, the OFF state of DMD optical modulators, what it was obtained
The dark portion of projected image is darker, i.e. black image of the black image of DMD optical modulators outgoing relative to LCD optical modulator outgoing
" more black ".Therefore, the present embodiment is conducive to obtaining smaller minimum using DMD optical modulators as the optical modulator of optical path downstream
Brightness, so as to increase the contrast of projection display system.
In the present embodiment, light-dividing device 320 is two TIR (Total Internal Reflection, total internal reflection) ribs
The combination of mirror, while undertaking light splitting and the effect of closing light.
In the present embodiment, the characteristic such as light-emitting device, light-dividing device, Multiplexing apparatus, structure function of optical modulator and each
The color selection for planting light (such as the first light, the second light, first wave length scope light, second wave length scope light ...) refers to above-mentioned reality
Apply the description in mode.
Fig. 9 is referred to, Fig. 9 is the structural representation of another embodiment of the utility model projection display system.Projection is aobvious
Show that system 40 includes light-emitting device 410, light-dividing device 420, the first optical modulator 431, the second optical modulator 432 and the 3rd light and adjusted
Device 433 processed.
Compared with the embodiment shown in Fig. 8, difference in this case is that, the 3rd optical modulator 433 is adjusted positioned at the first light
After the optical modulator 432 of device 431 and second processed rather than in light path before.In the technical scheme, the light that light-emitting device is sent point
Incide two different optical modulators after into two-way, it is modulated after obtain the image light of remitted its fury, image light re-incident
It is modulated to the 3rd optical modulator so that the heat production of three optical modulators is more uniform, slow down optical modulator because of fuel factor
Caused by aging, so as to extend the service life of optical modulator.
In the present embodiment, the characteristic such as light-emitting device, light-dividing device, Multiplexing apparatus, structure function of optical modulator and each
The color selection for planting light (such as the first light, the second light, first wave length scope light, second wave length scope light ...) refers to above-mentioned reality
Apply the description in mode.
Figure 10 is referred to, Figure 10 is the structural representation of another embodiment of the utility model projection display system.Projection
Display system 50 includes light-emitting device 510, light-dividing device 520, the first optical modulator 531, the second optical modulator 532, the 3rd light
Modulator 533 and Multiplexing apparatus 540.
Compared with the embodiment shown in Fig. 2, difference in this case is that, the 3rd optical modulator 533 is DMD light modulations
Device.
Figure 11 is referred to, Figure 11 is the structural representation of another embodiment of the utility model projection display system.Projection
Display system 60 includes light-emitting device 610, light-dividing device 620, the first optical modulator 631, the second optical modulator 632, the 3rd light
Modulator 633 and Multiplexing apparatus 640.
Compared with the embodiment shown in Figure 10, difference in this case is that, the 3rd optical modulator 633 is adjusted positioned at the first light
After the optical modulator 632 of device 631 and second processed rather than in light path before.In the technical scheme, the light that light-emitting device is sent point
Incide two different optical modulators after into two-way, it is modulated after obtain the image light of remitted its fury, image light re-incident
It is modulated to the 3rd optical modulator so that the heat production of three optical modulators is more uniform, slow down optical modulator because of fuel factor
Caused by aging, so as to extend the service life of optical modulator.
Meanwhile, the 3rd optical modulator 633 of DMD types is located at optical path downstream, is conducive to obtaining smaller minimum brightness, from
And increase the contrast of projection display system.Because DMD cost is higher with respect to LCD, the technical scheme is used only one
DMD, it is used in combination with two LCD, while improving brightness, contrast, has taken into account cost, with actual practical meaning
Justice.
Figure 12 is referred to, Figure 12 is the structural representation of another embodiment of the utility model projection display system.Projection
Display system 70 includes light-emitting device 710, light-dividing device 720, the first optical modulator 731, the second optical modulator 732, the 3rd light
Modulator 733 and Multiplexing apparatus 740.Compared with the embodiment shown in Fig. 7, the 3rd light is adjusted in differing only in for the present embodiment
The type of device processed replaces with reflective liquid crystal light valve LCOS (Liquid Crystal on Silicon).LCOS is relative to LCD's
Display contrast more preferably, can make it that the contrast of projection display system is higher, and LCOS and LCD are similarly liquid crystal modulator
Part, matching is more preferably.In the technical program, similarly, the light that light-emitting device is sent be divided into incided after two-way two it is different
Optical modulator, it is modulated after obtain the image light of remitted its fury, the image light is again incident on the 3rd optical modulator and is modulated, makes
The heat production for obtaining three optical modulators is more uniform, optical modulator is slow down because of aging caused by fuel factor, so as to extend light
The service life of modulator.
Similarly, in any of the above-described embodiment, the 3rd optical modulator can be replaced with reflective liquid crystal light valve
LCOS, and accordingly change light path does adaptations, here is omitted.
Figure 13 is referred to, Figure 13 is the structural representation of another embodiment of the utility model projection display system.Projection
Display system 80 includes light-emitting device 810, light-dividing device 820, the first optical modulator 831, the second optical modulator 832 and the 3rd light
Modulator 833.
From unlike the various embodiments described above, in the present embodiment technical scheme, the first optical modulator 831 and the second light modulation
Device 832 is all reflective liquid crystal light valve LCOS.
In the present embodiment, light-dividing device 820 includes a color-selective polarization device 821, incides color-selective polarization device
821 light is the linearly polarized light of the first polarization state, and color-selective polarization device changes the polarization state of second wave length scope light, without changing
Become the polarization state of first wave length scope light.When the first light of linear polarization passes through color-selective polarization device 821, first is converted into
The closing light of the first wave length scope light of polarization state and the second wave length scope light of the second polarization state, wherein the first polarization state and second
Polarization state is orthogonal polarization state.Light-dividing device 820 also includes polarizing beam splitter, for by the first wave length model of the first polarization state
Enclose light guiding and incide the first optical modulator 831 and by the guiding of the second wave length scope light of the second polarization state along the along the first light path
Two light paths incide the second optical modulator 832.First wave length scope light and second wave length scope light are respectively through the first optical modulator
831 and second optical modulator 832 modulate after, polarization state changes, so that closing light is the at the polarizing beam splitter of light-dividing device 820
Three smooth outgoing.
The present embodiment is first with color-selective polarization device by the polarization state of first wave length scope light and second wave length scope light
Be converted to two different polarization states, recycle polarizing beam splitter to carry out separation/combination, it is to avoid use wavelength light splitting piece point
In the technical scheme of light/closing light because the angular for inciding wavelength light splitting piece it is big caused by optical filtering curve drift phenomenon, protect
Demonstrate,prove under the premise of first wave length scope light and second wave length scope light light splitting accurately, reduce technological requirement.
, equally can be by the way of color-selective polarization device be combined with polarizing beam splitter in other above-mentioned each embodiments
Light splitting is carried out, to cause the light splitting of first wave length scope light and second wave length scope light more accurate.
In Figure 13 the present embodiment, the 3rd optical modulator 833 is transmission liquid crystal light valve LCD, the image light of its outgoing
For the linearly polarized light of single polarization state, the light-dividing device 820 of the present embodiment can be directly used for.In other embodiments,
Three optical modulators may be replaced by reflective liquid crystal light valve LCOS or digital micro-mirror device DMD, corresponding to change light path.
In Figure 13 the present embodiment, the 3rd optical modulator is arranged on the upstream of the first optical modulator and the second optical modulator
Light path.In other embodiments, the 3rd optical modulator can also be arranged on the light of the first optical modulator and the second optical modulator
Road downstream, but should be noted that when the 3rd optical modulator is liquid crystal light valve, it is necessary to increase in the light incident side of the 3rd optical modulator
Plus a color-selective polarization device, so that the light for inciding the 3rd optical modulator is the light of single polarization state.
Projection display system of the present utility model both can apply to projector's such as theatre projector, engineering projector, micro-
Type projector, education projector, Pin Qiang projectors, laser television etc., can also be applied to image illumination such as image projection lamp, hand over
The scenes such as logical instrument (car and boat aircraft) lamp, searchlight, stage lighting.
The embodiment of each in this specification is described by the way of progressive, and what each embodiment was stressed is and other
Between the difference of embodiment, each embodiment identical similar portion mutually referring to.
Embodiment of the present utility model is the foregoing is only, the scope of the claims of the present utility model is not thereby limited, it is all
It is the equivalent structure or equivalent flow conversion made using the utility model specification and accompanying drawing content, or directly or indirectly uses
In other related technical fields, similarly it is included in scope of patent protection of the present utility model.
Claims (10)
1. a kind of projection display system, it is characterised in that including：
Light-emitting device, for the first light and the second light according to sequential outgoing different colours；
Light-dividing device, for first light to be divided into along the first wave length scope light of the first light path outgoing and gone out along the second light path
The second wave length scope light penetrated, is additionally operable to guide at least part light of second light along the first light path outgoing；
First optical modulator, in first light path, for modulating the light along the first light path outgoing, the second optical modulator,
In second light path, for modulating the light along the second light path outgoing, the outgoing after first light modulator modulates
Light with after second light modulator modulates actinic light of outgoing obtain the 3rd light along the 3rd light path outgoing；
In 3rd optical modulator, the light path between the light-emitting device and the light-dividing device, for the luminous dress
The first light and the second light for putting outgoing are modulated；Or the 3rd optical modulator be located at the 3rd light path on, for described
3rd light is modulated.
2. projection display system according to claim 1, it is characterised in that first light is gold-tinted, second light
For blue light, the first wave length scope light is feux rouges or green glow.
3. projection display system according to claim 1, it is characterised in that the light-dividing device is additionally operable to described second
Light is divided into wavelength range light and the 4th wave-length coverage light along the second light path outgoing along the first light path outgoing.
4. projection display system according to claim 3, it is characterised in that first light is gold-tinted, second light
For green light, the first wave length scope light is feux rouges, and the second wave length scope light is green glow, and the wavelength range light is
Blue light, the 4th wave-length coverage light is green glow；
Or first light is gold-tinted, second light is magenta light, and the first wave length scope light is feux rouges, described second
Wave-length coverage light is green glow, and the wavelength range light is feux rouges, and the 4th wave-length coverage light is blue light.
5. projection display system according to claim 1, it is characterised in that the light-dividing device is additionally operable to described second
Light is divided into respectively along first light path and the light of two beam same colors of the second light path outgoing.
6. projection display system according to claim 1, it is characterised in that the light-dividing device includes color-selective polarization
Device and polarizing beam splitter, the color-selective polarization device are used for the first wave that first light is converted to the first polarization state
The closing light of long scope light and the second wave length scope light of the second polarization state, the polarizing beam splitter is used to the closing light being divided into
First wave length scope light along the first light path outgoing and the second wave length scope light along the second light path outgoing.
7. projection display system according to claim 1, it is characterised in that also including control device, described for controlling
The open and close of light-emitting device so that during the optical modulator is in rising edge or trailing edge, light-emitting device, which is in, to close
Closed state.
8. projection display system according to claim 1, it is characterised in that first light path and second light path
Equivalent optical path.
9. projection display system according to claim 1, it is characterised in that first optical modulator and second light
Modulator is one kind in transmission liquid crystal light valve, reflective liquid crystal light valve and digital micro-mirror device, the 3rd optical modulator
For one kind in transmission liquid crystal light valve, reflective liquid crystal light valve and digital micro-mirror device.
10. projection display system according to claim 9, it is characterised in that first optical modulator and described second
Optical modulator is digital micro-mirror device, and first optical modulator and second optical modulator are located at the 3rd light modulation
In the emergent light light path of device；Or
3rd optical modulator is digital micro-mirror device, and the 3rd optical modulator is located at first optical modulator and institute
State in the emergent light light path of the second optical modulator.
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| CN201621408142.2U CN206321932U (en) | 2016-12-21 | 2016-12-21 | A kind of projection display system |
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Address after: 518000 20-22, 20-22 headquarters building, 63 high tech Zone, Xuefu Road, Nanshan District, Guangdong Province, Guangdong. Patentee after: APPOTRONICS Corp.,Ltd. Address before: 518000 20-22, 20-22 headquarters building, 63 high tech Zone, Xuefu Road, Nanshan District, Guangdong Province, Guangdong. Patentee before: SHENZHEN GUANGFENG TECHNOLOGY Co.,Ltd. |
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Address after: 518000 20-22, 20-22 headquarters building, 63 high tech Zone, Xuefu Road, Nanshan District, Guangdong Province, Guangdong. Patentee after: SHENZHEN GUANGFENG TECHNOLOGY Co.,Ltd. Address before: 518055 Guangdong province Shenzhen Nanshan District Xili town Cha Guang road Shenzhen integrated circuit design application Industrial Park 401 Patentee before: APPOTRONICS Corp.,Ltd. |
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