CN103728726A - Display light source - Google Patents
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- CN103728726A CN103728726A CN201210389881.1A CN201210389881A CN103728726A CN 103728726 A CN103728726 A CN 103728726A CN 201210389881 A CN201210389881 A CN 201210389881A CN 103728726 A CN103728726 A CN 103728726A
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Abstract
A display light source comprises a light source body, a color wheel, an optical module and a driver. The light source body is used for providing light beams. The color wheel comprises a first path area and a second path area. The first path area and the second path area respectively comprise a reflection area and at least one smoothing area. The optical module is arranged between the light source body and the color wheel and used for guiding the light beams to the color wheel. The driver is used for driving the color wheel to rotate. When the light beams irradiate the smoothing area of the first path area, the light beams pass through the smoothing area within the first path area and are filtered into first primary-color light beams. When the light beams irradiate within the reflection area of the first path area, the light beams will be reflected back to the optical module, the optical module will guide the reflected light beams to the smoothing area of the second path area, so that the reflected light beams pass through the smoothing area of the second path area and are filtered into second primary-color light beams.
Description
Technical field
The present invention relates to a kind of display light source.
Background technology
Utilize the mankind's binocular parallax, existing 3 d display device is to provide respectively two different images of audience to reach stereo display.And the naked display of looking of solid wherein as its name suggests, need to be distinguished right and left eyes image with glasses unlike other 3 d display device, three-dimensional nakedly depending on display, allow audience be subject to stereopsis with naked visual sense.
Solid is naked provides multiple images depending on display with multiple light sources, and these images are projected to respectively different locus.When audience's right and left eyes lays respectively at wherein two locus, eyes can receive different images, and then experience stereopsis.Also because three-dimensional naked look display by multiple image projections to the different visual angle of audience, be therefore also referred to as various visual angles three-dimensional display.
The naked light source using depending on display of traditional solid mostly is cathode-ray tube (CRT), and each cathode-ray tube (CRT) provides an image, therefore causes overall volume excessive.And because solid is naked, depending on display, in arbitrary sequential, only by a light source, provide image, and in all cresteds of other light source of same sequential, therefore cause the unnecessary waste of energy.On the other hand, need be by through particular design in order to the projection lens of the cathode-ray tube (CRT) of arranging in pairs or groups, and build is huge.The picture renovation speed of adding cathode-ray tube (CRT) also has its restriction, therefore how to design small size and the dynamical light source of while tool, is the target that industry is made joint efforts.
Summary of the invention
Therefore, what the object of the invention is to provides a kind of display light source, is applicable to three-dimensional naked looking in display, in order to solve the difficulties such as the waste that light source is bulky, energy is unnecessary that above prior art mentions.
According to an embodiment of the present invention, a kind of display light source comprises light source, colour wheel, optical module and driver.Light source is in order to provide light beam.Colour wheel comprises the first path district and the second path district.The first path district and the second path district all comprise echo area and at least one filtering district.Optical module is placed between light source and colour wheel, in order to light beam is directed to colour wheel.Driver is in order to drive colour wheel to rotate, and light beam is beaten in the echo area in the first path district and the second path district and filtering district wherein at least one.When light beam is beaten the filtering district in the first path district, light beam will pass through the filtering district in the first path district, and is filtered into the first primary colour beam.When light beam is beaten the echo area in the first path district, light beam will be reflected back optics module, and optical module can be directed to the light beam after reflection the filtering district in the second path district, make the light beam after reflection pass through the filtering district in the second path district, and be filtered into the second primary colour beam.
In one or more embodiment of the present invention, the first path district is positioned at the inner ring of colour wheel, and the second path district is positioned at the outer ring of colour wheel.
In one or more embodiment of the present invention, the filtering district in the first path district radially aligns with the echo area in the second path district along colour wheel.
In one or more embodiment of the present invention, the echo area in the first path district radially aligns with the filtering district in the second path district along colour wheel.
In one or more embodiment of the present invention, the filtering district in the first path district comprises multiple primary colors filtering district.
In one or more embodiment of the present invention, the filtering district in the second path district comprises multiple primary colors filtering district.
In one or more embodiment of the present invention, optical module comprises isoceles triangle prism, a pair of prism wedge and collector lens.The bottom surface of isoceles triangle prism is plane of refraction.The long side surface of each prism wedge is incidence surface, and another long side surface of prism wedge, respectively with two central planes of isoceles triangle prism, forms total reflection gap therebetween.Collector lens is placed between isoceles triangle prism and colour wheel.Collector lens can be focused to colour wheel by the light of the plane of refraction from isoceles triangle prism, and the photoconduction of the echo area from first via footpath district and the second path district can be caused to the plane of refraction of isoceles triangle prism.
In one or more embodiment of the present invention, the angle between two long side surfaces of arbitrary prism wedge meets following equation:
θ=-tan
-1((n cos 3 φ+sin φ)/(n sin 3 φ+cos φ)), angle between two long side surfaces that wherein θ is arbitrary prism wedge, n is the refractive index of isoceles triangle prism and prism wedge, and φ is the angle at arbitrary base angle of isoceles triangle prism.
In one or more embodiment of the present invention, collector lens is collimation lens.
In one or more embodiment of the present invention, light source is high-pressure sodium lamp.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the display light source of an embodiment of the present invention.
Fig. 2 is the front elevation of the colour wheel in Fig. 1.
Fig. 3 is the enlarged diagram in the P region in Fig. 1.
Fig. 4 is the light path schematic diagram of the first half structure of the isoceles triangle prism in Fig. 1.
Fig. 5 is the schematic diagram of the Multi-view angle display of the display light source of application drawing 1.
Fig. 6 is projection lens in Fig. 5 schematic diagram when projection.
Wherein, description of reference numerals is as follows:
100: light source
110: the first primary colour beams
120: the second primary colour beams
122,122a, 124,126,128: light beam
200: colour wheel
210: the first paths district
212,222: echo area
214,224: filtering district
215,225: blue primary filtering district
216,226: green primary color filtering district
217,227: red primaries filtering district
220: the second paths district
300: optical module
310: isoceles triangle prism
312: bottom surface
313,315,323: normal
314: central plane
316: total reflection gap
320: prism wedge
322,324: long side surface
330: collector lens
332: convex surface
334: concave surface
400: driver
500: polarization spectro module
510: directional light element
520: total-reflection prism group
530: the first guide elements
540: the second guide elements
550: polarization spectro element
600: the first liquid crystal spectral modules
610,630,710,730: catoptron
620,650: convex lens
640,720: liquid crystal slot set
642,644,646,648: liquid crystal area
660,680,740,760: prism
670,750: photomodulator
700: the second liquid crystal spectral modules
800: polarization closes optical element
850: projection lens
852: image light source region
900: screen
910,930: lens pillar group
912,932: lens pillar
950: view and admire face
A, B, α, β, X1, X2, Y1, Y2, Y3, φ, φ 1, φ 2, θ, ψ, ψ 1: angle
I-I: Viewing Area
P: region
Embodiment
Below will be with graphic exposure multiple embodiments of the present invention, as clearly stated, the details in many practices will be explained in the following description.But, should be appreciated that, the details in these practices does not apply to limit the present invention.That is to say, in part embodiment of the present invention, the details in these practices is non-essential.In addition,, for the purpose of simplicity of illustration, some existing usual structures and element are graphic middle illustrating in the mode of simply illustrating.
Referring to Fig. 1 and Fig. 2.Fig. 1 is the schematic diagram of the display light source of an embodiment of the present invention.Fig. 2 is the front elevation of the colour wheel 200 in Fig. 1.Display light source comprises light source 100, colour wheel 200, optical module 300 and driver 400.Light source 100 is in order to provide light beam.Colour wheel 200 comprises the first path district 210 and the second path district 220.The first path district 210 comprises echo area 212 and at least one filtering district 214.The second path district 220 comprises echo area 222 and at least one filtering district 224.Optical module 300 is placed between light source 100 and colour wheel 200, in order to light beam is directed to colour wheel 200.Driver 400 is in order to drive colour wheel 200 to rotate, and light beam is beaten in the echo area 212,222 in the first path district 210 and the second path district 220 and filtering district 214,224 wherein at least one.When light beam is beaten the filtering district 214 in the first path district 210, light beam will pass through the filtering district 214 in the first path district 210, and is filtered into the first primary colour beam 110.And when light beam is beaten the echo area 212 in the first path district 210, light beam will be reflected back optics module 300, and optical module 300 can be directed to the light beam after reflection the filtering district 224 in the second path district 220, make the light beam after reflection pass through the filtering district 224 in the second path district 220, and be filtered into the second primary colour beam 120.
Detailed says, for example, in a certain sequential, light beam is beaten in the filtering district 214 in the first path district 210 and the echo area 222 in the second path district 220 simultaneously, as shown in solid arrow path.Beat at the light beam in the filtering district 214 in the first path district 210 and will directly be filtered into the first primary colour beam 110, and beat at the light beam of the echo area 222 in the second path district 220, will be reflected.First the light beam being reflected can be got back in optical module 300, after the interior a series of reflection of optical module 300 and refraction means, light beam will be directed to the filtering district 214 in the first path district 210 by optical module 300, make the light beam being reflected be filtered into equally the first primary colour beam 110.
Otherwise in another sequential, driver 400 is by make light beam beat in the echo area 212 in the first path district 210 and the filtering district 224 in the second path district 220 simultaneously, as shown in dotted arrow path.Beat at the light beam in the filtering district 224 in the second path district 220 and will directly be filtered into the second primary colour beam 120, and beat at the light beam of the echo area 212 in the first path district 210, will be reflected.First the light beam being reflected can be got back in optical module 300, after the interior a series of reflection of optical module 300 and refraction means, light beam will be directed to the filtering district 224 in the second path district 220 by optical module 300, make the light beam being reflected be filtered into equally the second primary colour beam 120.Should be appreciated that, above-mentioned solid arrow path and dotted arrow path all schematically illustrate the travel path of beam edge.
Thus, by the cooperation in the echo area 212,222 on optical module 300 and colour wheel 200 and filtering district 214,224, the light beam that light source 100 sends can become the first different primary colour beam 110 of position and the second primary colour beam 120 according to sequential.On the other hand, because beating at the segment beam of echo area 212,222, can see through optical module 300 Steerable filter districts 224,214, therefore the first primary colour beam 110 of producing and the second primary colour beam 120 will roughly keep light source 100 brightness originally, and unlikely significantly decay.
As shown in Figure 2, the first above-mentioned path district 210 is positioned at the inner ring of colour wheel 200, and the second path district 220 is positioned at the outer ring of colour wheel 200.Detailed says, the filtering district 214 in the first path district 210 radially aligns with the echo area 222 in the second path district 220 along colour wheel 200, the echo area 212 in the first path district 210 is along radially the aligning with the filtering district 224 in the second path district 220 of colour wheel 200, but the present invention is not as limit.As long as in a sequential in office, light beam is got to the echo area in arbitrary path district and the filtering district in another path district simultaneously, and the light of echo area is reflexed to the filtering district in another path district, all can reach identical result, persond having ordinary knowledge in the technical field of the present invention, should look actual needs, the arrangement position in Flexible Design colour wheel 200Shang Ge district and order.
In order to make display light source that color light source can be provided, filtering district 214 and 224 can comprise respectively multiple primary colors filtering district.These primary colors filtering districts can become filtered light beam the primary colour beam of tool different-waveband.In the present embodiment, above-mentioned primary colors filtering district for example can be blue primary filtering district 215,225, green primary color filtering district 216,226 and/or red primaries filtering district 217,227, therefore the first primary colour beam 110 can be the first blue primary light beam, the first green primary color light beam or the first red primaries light beam, and the second primary colour beam 120 can be the second blue primary light beam, the second green primary color light beam or the second red primaries light beam.But, in one or more embodiment, primary colors filtering district can add xanthan look filtering district again, to increase the vividness of picture.It should be noted, the color in above-mentioned lifted primary colors filtering district is only for illustrating, and not in order to limit the present invention, persond having ordinary knowledge in the technical field of the present invention, should look actual needs, the color in Flexible Design primary colors filtering district.
Then referring to Fig. 1 and Fig. 3.Fig. 3 illustrates the enlarged diagram into the P region in Fig. 1.In the present embodiment, optical module 300 comprises isoceles triangle prism 310, a pair of prism wedge 320 and collector lens 330.The bottom surface 312 of isoceles triangle prism 310 is a plane of refraction.The long side surface 322 of each prism wedge 320 is incidence surface, and the long side surface 324 of prism wedge 320, respectively with two central planes 314 of isoceles triangle prism 310, forms total reflection gap 316 therebetween.Collector lens 330 is placed between isoceles triangle prism 310 and colour wheel 200.Collector lens 330 can be focused to colour wheel 200 by the light of the plane of refraction from isoceles triangle prism 310, and the photoconduction of the echo area from first via footpath district 210 and the second path district 220 212 and 222 can be caused to the plane of refraction of isoceles triangle prism 310.
In one or more embodiment, collector lens 330 can be collimation lens.Collimation lens has a convex surface 332 and a concave surface 334.When after convex surface 332 incidents of a directional light self-focus lens, can be by concave surface 334 by this parallel light focusing to one focus point.Contrary, after concave surface 334 incidents of a pointolite self-focus lens, can diverge to a directional light by convex surface 332.In addition, above-mentioned light source 100 can be a high-pressure sodium lamp, and making the light beam that light source 100 provides is directional light, but the present invention is not as limit.
Should be appreciated that, for example, at prism (: isoceles triangle prism 310 or prism wedge 320) and the interface of air, have an angle of total reflection, and the size of the angle of total reflection is relevant with used prism material.With the light that is greater than angle of total reflection incident interface in prism, will produce total reflection, and will penetrate with the light that is less than angle of total reflection incident interface in prism.
Below how explanation is suitably designed to isoceles triangle prism 310 and prism wedge 320, to reach above-mentioned refraction and reflecting mechanism.Should be appreciated that, the solid arrow path and the dotted arrow path that due to Fig. 1, illustrate have roughly the same path, and only the direction of propagation of segment beam is contrary, and therefore following narration all only coordinates solid arrow path to be illustrated.
In the present embodiment, the light beam being sent by light source 100 is directional light.The prism forming because of isoceles triangle prism 310 and a pair of prism wedge 320 combines, height with respect to the bottom surface 312 of isoceles triangle prism 310 is mirror image symmetry, and therefore light beam 122 and 124 has identical refraction angle with respect to bottom surface 312 (as shown in Figure 3).In addition, in order to coordinate collimation lens, light beam 122 and 126 can be designed to one group of parallel beam, and light beam 124 and 128 can be designed to another group parallel beam.Wherein light beam 122 and 126 is positioned at the second path district 220 (as shown in Figure 2) of colour wheel 200 with respect to the focus point of collimation lens, and light beam 124 and 128 is positioned at the first path district 210 of colour wheel 200 with respect to the focus point of collimation lens.Therefore light beam 122,124,126 and 128 all has identical refraction angle with respect to bottom surface 312.
As mentioned above, because prism combination is mirror image symmetry with respect to the height of isoceles triangle prism 310, therefore the narration below only explains with the P region in Fig. 1 (being defined as the first half structure of prism combination in this narration), and the Lower Half structure of prism combination also has identical result, just repeat no more.For the sake of clarity, first consider refraction and the reflecting mechanism of light beam in isoceles triangle prism 310.Fig. 4 is the light path schematic diagram of the first half structure of the isoceles triangle prism 310 in Fig. 1.Isoceles triangle prism 310 has refractive index n, and the angle at arbitrary base angle is φ.Arbitrary central plane 314 of isoceles triangle prism 310 has normal 315, and the bottom surface 312 of isoceles triangle prism 310 has normal 313.When not adding prism wedge 320 (as shown in Figure 3), light beam 128 is from the angle incident isoceles triangle prism 310 rear arrival central planes 314 of 312Yi angle, bottom surface Y1.Because light beam 128 is greater than the angle of total reflection at central plane 314 interfaces with respect to the incident angle (X1+X2+ β) of normal 315, therefore light beam 128 will be totally reflected.Light beam 128 after total reflection is parallel with bottom surface 312, and again because reflection angle equates with incident angle, therefore can obtain φ 1=φ=φ 2.On the other hand, light beam 122a is the angle incident isoceles triangle prism 310 with angle α from central plane 314, arrives afterwards behind bottom surface 312, with the angle refraction of angle Y2, leaves isoceles triangle prism 310.As mentioned above, in order to make light beam 128 and 122a have identical refraction angle in bottom surface 312, therefore setting Y1=Y2, is that ear law (Snell ' s law) and parallel theorem can obtain X1=X2 by department.In addition, according to similar triangles law, can obtain (X2+ β)=φ, therefore X1=90 ° of-2 φ.
Thus, according to department, be ear law:
sinα=n?sinβ，
Sin α=n sin (φ-90 °+2 φ), therefore can obtain:
α=-sin
-1(n?cos3φ)。
Get back to Fig. 3.Then consider refraction and reflecting mechanism in prism combination that light beam forms in isoceles triangle prism 310 and prism wedge 320.Prism wedge 320 has refractive index n, and the angle between long side surface 322 and 324 is θ.Add after prism wedge 320, light beam 122 is able to be parallel to the direction incident (incident direction of the parallel light beam namely providing in above-mentioned light source 100) of normal 313, and penetrates isoceles triangle prism 310 with the angle of Y3=Y1.The incident angle of light beam 122 is A, and light beam 122 enters isoceles triangle prism 310 and has refraction angle B.According to parallel theorem and similar triangles law, can obtain respectively ψ=ψ 1, and φ=X3+B+ θ.Because of Y3=Y1, can obtain X3=X1 again, therefore B=3 φ-90 °-θ, and A=90 °-ψ=90 °-ψ 1=90 °-(90 °-φ+θ)=φ-θ.
According to department, be ear law:
sinA=n?sinB，
Sin (φ-θ)=n sin (3 φ-90 °-θ), therefore can obtain:
θ=-tan
-1((n?cos?3φ+sinφ)/(n?sin?3φ+cosφ))。
In the present embodiment, if n=1.5168 can obtain φ=41.2452 °, α=57.39 °, and θ=5.14 °.
Fig. 5 is the schematic diagram of the Multi-view angle display of the display light source of application drawing 1.Multi-view angle display comprises display light source, polarization spectro module 500, the first liquid crystal spectral module 600, the second liquid crystal spectral module 700, polarization and closes optical element 800 and projection lens 850.
Polarization spectro module 500 is placed in the rear of colour wheel 200, in order to the travel path of the first primary colour beam 110 and the second primary colour beam 120 is separated.Polarization spectro module 500 comprises directional light element 510, total-reflection prism group 520, the first guide element 530, the second guide element 540 and polarization spectro element 550.The first primary colour beam 110 and the second primary colour beam 120 are injected total-reflection prism group 520 with directional light state after by directional light element 510.Total-reflection prism group 520 comprises two prisms that adjoin in opposite directions, and the interface of this two prism is a total reflection gap.The first primary colour beam 110 with wide-angle incident total reflection gap will be reflected onto the first guide element 530, and will penetrate into the second guide element 540 with second primary colour beam 120 in low-angle incident total reflection gap.The first guide element 530 and the second guide element 540 are directed to the first primary colour beam 110 and the second primary colour beam 120 respectively two crossing sides of polarization spectro element 550, and polarization spectro element 550 is divided into the light of tool the first polarization state and the light of tool the second polarization state by the first primary colour beam 110 and the second primary colour beam 120 respectively.The first primary colour beam 110 of tool the first polarization state and the second primary colour beam 120 of tool the second polarization state then enter the first liquid crystal spectral module 600, and the first primary colour beam 110 of tool the second polarization state and the second primary colour beam 120 of tool the first polarization state then enter the second liquid crystal spectral module 700, carry out further light splitting.
The first liquid crystal spectral module 600 comprises catoptron 610 and 630, convex lens 620 and 650, liquid crystal slot set 640, prism 660 and 680 and photomodulator 670.First the first primary colour beam 110 of tool the first polarization state and the second primary colour beam 120 of tool the second polarization state are directed to liquid crystal slot set 640 by catoptron 610 and 630, and assemble light beam via convex lens 620.Liquid crystal slot set 640 comprises at least four liquid crystal areas 642,644,646 and 648, and convex lens 620 are directed to liquid crystal area 642 and 644 by the first primary colour beam 110 of tool the first polarization state, and the second primary colour beam 120 of tool the second polarization state is directed to liquid crystal area 646 and 648.Light beam can form four road light beams according to sequential after by liquid crystal slot set 640, and these light beams then diverge to after directional light through convex lens 650, then be directed to photomodulator 670 by prism 660.It is the light of tool different images that photomodulator 670 is modulated respectively four road light beams, spreads out of the first liquid crystal spectral module 600 more afterwards via prism 680.
In one or more embodiment, liquid crystal area 642,644,646 and 648 is when opening, the polarization state of light beam can be changed, the light that is about to tool the first polarization state is transformed into the light of tool the second polarization state, or the light of tool the second polarization state is transformed into the light of tool the first polarization state.On the other hand, liquid crystal area 642,644,646 and 648 respectively comprises a polarization plates, is placed in respectively the side of liquid crystal area 642,644,646 and 648 near convex lens 650, with so that the light of the light of tool the first polarization state or tool the second polarization state one of them pass through.
Therefore take the first primary colour beam 110 of tool the first polarization state as example, the polarization plates of liquid crystal area 642 and 644 can select to allow the light of tool the first polarization state pass through.In the first sequential, liquid crystal area 642 is in opening, and liquid crystal area 644 is in closed condition.The first primary colour beam 110 of tool the first polarization state arrives behind liquid crystal area 642 and 644, the light beam that is positioned at liquid crystal area 642 will change the first primary colour beam 110 of tool the second polarization state into, and the light beam that is positioned at liquid crystal area 644 will maintain the first primary colour beam 110 of tool the first polarization state, but because the polarization plates of liquid crystal area 642 and 644 is merely able to allow the light of tool the first polarization state pass through, therefore the light that is positioned at liquid crystal area 642 will be fallen by gear, and the light that is positioned at liquid crystal area 644 will pass through.
In next sequential, liquid crystal area 642 is in closed condition, and liquid crystal area 644 is in opening.The first primary colour beam 110 of tool the first polarization state arrives behind liquid crystal area 642 and 644, the light beam that is positioned at liquid crystal area 642 will maintain the first primary colour beam 110 of tool the first polarization state, and the light beam that is positioned at liquid crystal area 644 will change the first primary colour beam 110 of tool the second polarization state into, therefore the light that is positioned at liquid crystal area 644 will be fallen by gear, and the light that is positioned at liquid crystal area 642 will pass through.The liquid crystal area 646 and 648 of impact impact for the first primary colour beam 110 of tool the first polarization state as liquid crystal area 642 and 644 as for to(for) the second primary colour beam 120 of tool the second polarization state, therefore just repeats no more.Thus, the first liquid crystal spectral module 600 can pass through Si road light beam from liquid crystal area 642,644,646 and 648 respectively according to timing sequence generating.
In one or more embodiment, liquid crystal area can more comprise half-wavelength phase delay device (half wave phase retardar) to reach the object of above-mentioned light splitting.Half-wavelength phase delay device can change the polarization state of light beam, and the light that is about to the first polarization state is transformed into the light of the second polarization state, or the light of the second polarization state is transformed into the light of the first polarization state.
For example, liquid crystal area 644 and 648 can more comprise half-wavelength phase delay device, and is placed in respectively a side of the incidence surface of liquid crystal area 644 and 648.Therefore take the first primary colour beam 110 of tool the first polarization state as example, in the first sequential, liquid crystal area 642 and 644 is all in opening.The first primary colour beam 110 of tool the first polarization state arrives behind liquid crystal area 642 and 644, and the light beam that is positioned at liquid crystal area 642 will change the first primary colour beam 110 of tool the second polarization state into.And the light beam of half-wavelength phase delay device that arrives liquid crystal area 644 can first change the first primary colour beam 110 of tool the second polarization state into, rear arrival liquid crystal area 644 after transform back into once again the first primary colour beam 110 of tool the first polarization state.Because the polarization plates of liquid crystal area 642 and 644 is merely able to allow the light of the first polarization state pass through, the light that is therefore positioned at liquid crystal area 642 will be fallen by gear, and the light that is positioned at liquid crystal area 644 will pass through.
In next sequential, liquid crystal area 642 and 644 is all in closed condition.The first primary colour beam 110 of tool the first polarization state arrives behind liquid crystal area 642 and 644, the light beam that is positioned at liquid crystal area 642 will maintain the first primary colour beam 110 of tool the first polarization state, and the light beam of half-wavelength phase delay device that arrives liquid crystal area 644 can change the first primary colour beam 110 of tool the second polarization state into, arrive afterwards the first primary colour beam 110 that still maintains tool the second polarization state behind liquid crystal area 644.Therefore the light that is positioned at liquid crystal area 644 will be fallen by gear, and the light that is positioned at liquid crystal area 642 will pass through.The liquid crystal area 646 and 648 of impact impact for the first primary colour beam 110 of tool the first polarization state as liquid crystal area 642 and 644 as for to(for) the second primary colour beam 120 of tool the second polarization state, therefore just repeats no more.Thus, the first liquid crystal spectral module 600 can pass through Si road light beam from liquid crystal area 642,644,646 and 648 respectively according to timing sequence generating.
It should be noted, the light splitting mode of above-mentioned liquid crystal slot set 640 is only for illustrating, and not in order to limit the present invention, persond having ordinary knowledge in the technical field of the present invention, should look actual needs, the light splitting mode of Flexible Design liquid crystal slot set 640.
The second liquid crystal spectral module 700 comprises catoptron 710 and 730, liquid crystal slot set 720, prism 740 and 760 and photomodulator 750.First the first primary colour beam 110 of tool the second polarization state and the second primary colour beam 120 of tool the first polarization state are directed to liquid crystal slot set 720 by catoptron 710 and 730.Liquid crystal slot set 720 comprises at least four liquid crystal areas, and the first primary colour beam 110 of the second polarization state and the second primary colour beam 120 of the first polarization state will be directed to respectively two adjacent liquid crystal areas.Light beam can form four road light beams according to sequential after by liquid crystal slot set 720, and these light beams are directed to photomodulator 750 by prism 740.It is the light of tool different images that photomodulator 750 is modulated respectively four road light beams, after via prism 760, spread out of the second liquid crystal spectral module 700 again.And because the process of liquid crystal slot set 720 light splitting is because of similar to liquid crystal slot set 640, therefore just repeat no more.
Through the light splitting of above-mentioned liquid crystal slot set 640 and 720, by the light beam of the first liquid crystal spectral module 600 and the second liquid crystal spectral module 700, can be divided into respectively four road light beams.Zhe Ba road light beam becomes after image light, and through polarization, close optical element 800 respectively and reach arbitrary image light source region 852 of 850 li of projection lens, therefore in same projection lens 850, can be according to eight images of timing sequence generating.What is more, in same sequential, the first liquid crystal spectral module 600 and the second liquid crystal spectral module 700 can respectively provide an image simultaneously.That is to say, the switching rate of photomodulator 670 and 750 respectively only need to be higher than 240Hz, and eight images can reach the minimum requirements (the minimum 60Hz of need of each image) of image renewal rate.
Fig. 6 is projection lens 850 in Fig. 5 schematic diagram when projection.Projection lens 850 can be by image projecting to screen 900 in image light source region 852.In order to reach the image of various visual angles, screen 900 can comprise cylindrical lens group 910 and 930 and diffuser plate 920.Cylindrical lens group 910 comprises multiple cylindrical lens 912, and each cylindrical lens 912 is in order to be focused to diffuser plate 920 with imaging by the image projecting from projection lens 850.Image on diffuser plate 920 can be dispersed by arbitrary cylindrical lens 932 of cylindrical lens group 930.Therefore when audience's eyes are positioned at arbitrary Viewing Area I-I of sightingpiston 950, just can receive wantonly two images that project from projection lens 850, to experience stereopsis.
Although the present invention discloses as above with embodiment; but it is not in order to limit the present invention; anyly have the knack of this skill person; without departing from the spirit and scope of the present invention; when being used for a variety of modifications and variations, the scope that therefore protection scope of the present invention ought define depending on appending claims is as the criterion.
Claims (10)
1. a display light source, comprises:
One light source, in order to provide a light beam;
One colour wheel, comprises one first path district and one second path district, and this first path district and this second path district all comprise an echo area and at least one filtering district;
One optical module, is placed between this light source and this colour wheel, in order to this light beam is directed to this colour wheel; And
One driver, in order to drive this colour wheel to rotate, this light beam is beaten in the described echo area in this first path district and this second path district and described filtering district wherein at least one, when this light beam is beaten this filtering district in this first path district, this light beam will pass through this filtering district in this first path district, and be filtered into one first primary colour beam, when this light beam is beaten this echo area in this first path district, this light beam will be reflected back this optical module, and this optical module can be directed to this light beam after reflection this filtering district in this second path district, make this light beam after reflection pass through this filtering district in this second path district, and be filtered into one second primary colour beam.
2. display light source as claimed in claim 1, wherein this first path district is positioned at the inner ring of this colour wheel, and this second path district is positioned at the outer ring of this colour wheel.
3. display light source as claimed in claim 2, wherein this filtering district in this first path district radially aligning with this echo area in this second path district along this colour wheel.
4. display light source as claimed in claim 2, wherein this echo area in this first path district radially aligning with this filtering district in this second path district along this colour wheel.
5. display light source as claimed in claim 1, wherein this filtering district in this first path district comprises multiple primary colors filtering district.
6. display light source as claimed in claim 1, wherein this filtering district in this second path district comprises multiple primary colors filtering district.
7. display light source as claimed in claim 1, wherein this optical module comprises:
One isoceles triangle prism, the bottom surface of this isoceles triangle prism is a plane of refraction;
A pair of prism wedge, a long side surface of every a pair of prism wedge is an incidence surface, and this another long side surface to prism wedge, respectively with two central planes of this isoceles triangle prism, forms a total reflection gap therebetween; And
One collector lens, be placed between this isoceles triangle prism and this colour wheel, this collector lens can be focused to this colour wheel by the light of this plane of refraction from these lumbar triangle prisms, and the photoconduction of the described echo area from this first path district and this second path district can be caused to this plane of refraction of this isoceles triangle prism.
8. display light source as claimed in claim 7, wherein the angle between two long side surfaces of arbitrary described prism wedge meets following equation:
θ=-tan
-1((n cos 3 φ+sin φ)/(n sin 3 φ+cos φ)), angle between two long side surfaces that wherein θ is arbitrary described prism wedge, n is this isoceles triangle prism and this refractive index to prism wedge, and φ is the angle at arbitrary base angle of this isoceles triangle prism.
9. display light source as claimed in claim 1, wherein this collector lens is a collimation lens.
10. display light source as claimed in claim 1, wherein this light source is a high-pressure sodium lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210389881.1A CN103728726B (en) | 2012-10-15 | 2012-10-15 | Display light source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210389881.1A CN103728726B (en) | 2012-10-15 | 2012-10-15 | Display light source |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103728726A true CN103728726A (en) | 2014-04-16 |
| CN103728726B CN103728726B (en) | 2016-03-09 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210389881.1A Expired - Fee Related CN103728726B (en) | 2012-10-15 | 2012-10-15 | Display light source |
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| Country | Link |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2324166A (en) * | 1997-04-09 | 1998-10-14 | Samsung Electronics Co Ltd | Reflection projector having image generation unit and critical angle prism |
| EP1219978A2 (en) * | 2000-12-29 | 2002-07-03 | Lg Electronics Inc. | Total reflection prism and reflection type projector using such a prism |
| JP3335961B2 (en) * | 1999-09-24 | 2002-10-21 | エヌイーシービューテクノロジー株式会社 | Time-division video projector |
| CN1570708A (en) * | 2003-07-15 | 2005-01-26 | 台达电子工业股份有限公司 | Display system |
-
2012
- 2012-10-15 CN CN201210389881.1A patent/CN103728726B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2324166A (en) * | 1997-04-09 | 1998-10-14 | Samsung Electronics Co Ltd | Reflection projector having image generation unit and critical angle prism |
| JP3335961B2 (en) * | 1999-09-24 | 2002-10-21 | エヌイーシービューテクノロジー株式会社 | Time-division video projector |
| EP1219978A2 (en) * | 2000-12-29 | 2002-07-03 | Lg Electronics Inc. | Total reflection prism and reflection type projector using such a prism |
| CN1570708A (en) * | 2003-07-15 | 2005-01-26 | 台达电子工业股份有限公司 | Display system |
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| Publication number | Publication date |
|---|---|
| CN103728726B (en) | 2016-03-09 |
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