CN103728726B - Display light source - Google Patents
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- CN103728726B CN103728726B CN201210389881.1A CN201210389881A CN103728726B CN 103728726 B CN103728726 B CN 103728726B CN 201210389881 A CN201210389881 A CN 201210389881A CN 103728726 B CN103728726 B CN 103728726B
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Abstract
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.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 rotates in order to drive colour wheel.When light beam is beaten when the filtering district in the first path district, light beam by the filtering district by the first path district, and is filtered into the first primary colour beam.When light beam is beaten when the echo area in the first path district, light beam will be reflected back optical module, and the light beam after reflection can be directed to the filtering district in the second path district by optical module, make the light beam after reflecting by the filtering district in the second path district, and be filtered into the second primary colour beam.
Description
Technical field
The present invention relates to a kind of display light source.
Background technology
Utilize the binocular parallax of the mankind, existing 3 d display device is to provide image that audience two is different to reach stereo display respectively.And the naked display of looking of solid wherein, as the term suggests the 3 d display device unlike other needs to use glasses to distinguish right and left eyes image, solid is naked allows audience can be subject to stereopsis with naked visual sense depending on display.
Solid is naked provides multiple image depending on display with multiple light source, and these images are projected to different locus respectively.When the right and left eyes of audience lay respectively at wherein two locus time, eyes can receive different images, and then experience stereopsis.Also because three-dimensional nakedly look display by multiple image projection to the different visual angle of audience, therefore multi-view stereoscopic display is also referred to as.
The naked light source used 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 only by a light source provide image depending on display in arbitrary sequential because solid is naked, and in other light source all cresteds of same sequential, therefore cause the waste that energy is unnecessary.On the other hand, the projection lens in order to cathode-ray tube (CRT) of arranging in pairs or groups need by through particular design, and build is huge.The picture renovation speed of adding cathode-ray tube (CRT) also has it limit, and therefore how designing small size and the simultaneously dynamical light source of tool, is the target of industry 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 nakedly look 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.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 rotates in order to drive colour wheel, 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 when the filtering district in the first path district, light beam by the filtering district by the first path district, and is filtered into the first primary colour beam.When light beam is beaten when the echo area in the first path district, light beam will be reflected back optical module, and the light beam after reflection can be directed to the filtering district in the second path district by optical module, make the light beam after reflecting by 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 aligns along the radial direction of colour wheel and the echo area in the second path district.
In one or more embodiment of the present invention, the echo area in the first path district aligns along the radial direction of colour wheel and the filtering district in the second path district.
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 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.The light of the plane of refraction from isoceles triangle prism can be focused to colour wheel by collector lens, and the photoconduction of the echo area from first via footpath district and the second path district can be caused 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((ncos3 φ+sin φ)/(nsin3 φ+cos φ)), wherein θ is the angle between two long side surfaces of 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 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 the schematic diagram of projection lens in time projecting in Fig. 5.
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 beam splitter
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 with graphic exposure multiple embodiment 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 is not applied to limit the present invention.That is, in some embodiments 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 illustrate in the mode simply illustrated in the drawings.
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.First path district 210 comprises echo area 212 and at least one filtering district 214.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 rotates in order to drive colour wheel 200, 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 when the filtering district 214 in the first path district 210, light beam by the filtering district 214 by the first path district 210, and is filtered into the first primary colour beam 110.And when light beam is beaten when the echo area 212 in the first path district 210, light beam will be reflected back optical module 300, and the light beam after reflection can be directed to the filtering district 224 in the second path district 220 by optical module 300, make the light beam after reflecting by the filtering district 224 in the second path district 220, and be filtered into the second primary colour beam 120.
Specifically, such as, in a certain sequential, light beam beats the echo area 222 in filtering district 214 in the first path district 210 and the second path district 220 simultaneously, as shown in solid line arrow path.Beat 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 and will be reflected at the light beam of the echo area 222 in the second path district 220.First can be got back in optical module 300 by the light beam reflected, after reflection a series of in 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 to be filtered into the first primary colour beam 110 equally by the light beam reflected.
Otherwise in another sequential, the filtering district 224 that driver 400 will make light beam beat echo area 212 in the first path district 210 and the second path district 220, as shown in dotted arrow path simultaneously.Beat 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 and will be reflected at the light beam of the echo area 212 in the first path district 210.First can be got back in optical module 300 by the light beam reflected, after reflection a series of in 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 to be filtered into the second primary colour beam 120 equally by the light beam reflected.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 and the second primary colour beam 120 of position according to sequential.On the other hand, because of beat segment beam in echo area 212,222 can through optical module 300 Steerable filter district 224,214, therefore the first produced primary colour beam 110 and the second primary colour beam 120 roughly will keep light source 100 brightness originally, and unlikelyly 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 then positioned at the outer ring of colour wheel 200.Specifically, the filtering district 214 in the first path district 210 aligns along the radial direction of colour wheel 200 and the echo area 222 in the second path district 220, the echo area 212 in the first path district 210 then aligns along the filtering district 224 in the radial direction of colour wheel 200 and the second path district 220, 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, actual needs should be looked, the arrangement position in Flexible Design colour wheel 200 Shang Ge district and order.
In order to enable display light source provide color light source, filtering district 214 and 224 can comprise multiple primary colors filtering district respectively.Filtered light beam can be become the primary colour beam of tool different-waveband by these primary colors filtering districts.In the present embodiment, above-mentioned primary colors filtering district such as 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 illustration, and is not used to limit the present invention, and 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 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.The light of the plane of refraction from isoceles triangle prism 310 can be focused to colour wheel 200 by collector lens 330, and the photoconduction of the echo area 212 and 222 from first via footpath district 210 and the second path district 220 can be caused the plane of refraction of isoceles triangle prism 310.
In one or more embodiment, collector lens 330 can be collimation lens.Collimation lens has convex surface 332 and a concave surface 334.After convex surface 332 incidence of a directional light self-focus lens, can by concave surface 334 by this parallel light focusing to one focus point.Contrary, after concave surface 334 incidence of a pointolite self-focus lens, a directional light can be diverged to by convex surface 332.In addition, above-mentioned light source 100 can be a high-pressure sodium lamp, and the light beam that light source 100 is provided is directional light, but the present invention is not as limit.
Should be appreciated that, there is an angle of total reflection at prism (such as: isoceles triangle prism 310 or prism wedge 320) and the interface of air, and the size of the angle of total reflection is relevant with used prism material.With the light being greater than the angle of total reflection incident interface in prism, generation is totally reflected, and will penetrates with the light being less than the angle of total reflection incident interface in prism.
Below will illustrate and how suitably to design isoceles triangle prism 310 and prism wedge 320, to reach above-mentioned refraction and reflecting mechanism.Should be appreciated that, the solid arrow path illustrated due to Fig. 1 and dotted arrow path have roughly the same path, and only the direction of propagation of segment beam is contrary, and therefore following describing all only coordinates solid arrow path to be illustrated.
In the present embodiment, the light beam sent by light source 100 is directional light.Because of the prism arrangement that isoceles triangle prism 310 and a pair prism wedge 320 form, be specular relative to the height of the bottom surface 312 of isoceles triangle prism 310, therefore light beam 122 and 124 has identical refraction angle relative 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 relative 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 relative to the focus point of collimation lens.Therefore light beam 122,124,126 and 128 all has identical refraction angle relative to bottom surface 312.
As mentioned above, because prism arrangement is specular relative to the height of isoceles triangle prism 310, describing therefore only explains with the P region (being defined as the first half structure of prism arrangement in this describes) in Fig. 1, and the Lower Half structure of prism arrangement also has identical result, just repeat no more.For the sake of clarity, first the refraction of light beam in isoceles triangle prism 310 and reflecting mechanism is considered.Fig. 4 is the light path schematic diagram of the first half structure of 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 arrives central plane 314 from bottom surface 312 so that the incident isoceles triangle prism of the angle of angle Y1 310 is rear.Because light beam 128 to be greater than the angle of total reflection at central plane 314 interface relative 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 is equal with incident angle, therefore can obtain φ 1=φ=φ 2.On the other hand, light beam 122a with the incident isoceles triangle prism 310 of the angle of angle α, after arriving bottom surface 312 afterwards, leaves isoceles triangle prism 310 with the angle refraction of angle Y2 from central plane 314.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 ' slaw) and parallel theorem can obtain X1=X2 by department.In addition, (X2+ β)=φ can be obtained according to similar triangles law, therefore X1=90 ° of-2 φ.
Thus, be ear law according to department:
sinα=nsinβ，
Sin α=nsin (φ-90 ° of+2 φ), therefore can obtain:
α=-sin
-1(ncos3φ)。
Get back to Fig. 3.Then the refraction in the prism arrangement that light beam forms in isoceles triangle prism 310 and prism wedge 320 and reflecting mechanism is considered.Prism wedge 320 has refractive index n, and the angle between long side surface 322 and 324 is θ.After adding prism wedge 320, light beam 122 is able to be parallel to the direction incidence (incident direction of the parallel light beam namely provided in above-mentioned light source 100) of normal 313, and with the angle of Y3=Y1 injection isoceles triangle prism 310.The incident angle of light beam 122 is A, and light beam 122 enters isoceles triangle prism 310 has refraction angle B.According to parallel theorem and similar triangles law, ψ=ψ 1 can be obtained respectively, and φ=X3+B+ θ.Again because of Y3=Y1, can X3=X1 be obtained, therefore B=3 φ-90 ° of-θ, and A=90 °-ψ=90 °-ψ 1=90 °-(90 ° of-φ+θ)=φ-θ.
Be ear law according to department:
sinA=nsinB，
Sin (φ-θ)=nsin (3 φ-90 °-θ), therefore can obtain:
θ=-tan
-1((ncos3φ+sinφ)/(nsin3φ+cosφ))。
In the present embodiment, if n=1.5168, then 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, first liquid crystal spectral module 600, second liquid crystal spectral module 700, polarization conjunction optical element 800 and projection lens 850.
Polarization spectro module 500 is placed in the rear of colour wheel 200, in order to be separated by the travel path of the first primary colour beam 110 and the second primary colour beam 120.Polarization spectro module 500 comprises directional light element 510, total-reflection prism group 520, first guide element 530, second guide element 540 and polarization beam splitter 550.First primary colour beam 110 and the second primary colour beam 120 are by injecting total-reflection prism group 520 with directional light state after directional light element 510.Total-reflection prism group 520 comprises two prisms adjoined in opposite directions, and the interface of this two prism is a total reflection gap.The first guide element 530 will be reflected onto with first primary colour beam 110 in large angle incidence total reflection gap, and the second guide element 540 will be penetrated into second primary colour beam 120 in low-angle incidence total reflection gap.First primary colour beam 110 and the second primary colour beam 120 are directed to two sides of intersecting of polarization beam splitter 550 by the first guide element 530 and the second guide element 540 respectively, and namely the first primary colour beam 110 and the second primary colour beam 120 are divided into the light of tool first polarization state and the light of tool second polarization state by polarization beam splitter 550 respectively.First primary colour beam 110 of tool first polarization state and the second primary colour beam 120 of tool second polarization state then enter the first liquid crystal spectral module 600, and the second primary colour beam 120 of the first primary colour beam 110 of tool second polarization state and tool first polarization state then enters the second liquid crystal spectral module 700, carries out further light splitting.
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 first primary colour beam 110 of tool first polarization state and the second primary colour beam 120 of tool 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 the first primary colour beam 110 of tool first polarization state is directed to liquid crystal area 642 and 644 by convex lens 620, and the second primary colour beam 120 of tool second polarization state is directed to liquid crystal area 646 and 648.Light beam is by forming four road light beams according to sequential after liquid crystal slot set 640, and these light beams then after convex lens 650 diverge to directional light, then are directed to photomodulator 670 by prism 660.The light that four road light beams are tool different images modulated respectively by photomodulator 670, 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 by tool first polarization state is transformed into the light of tool second polarization state, or the light of tool second polarization state is transformed into the light of tool first polarization state.On the other hand, liquid crystal area 642,644,646 and 648 respectively comprises a polarization plates, is placed in liquid crystal area 642,644,646 and 648 respectively near the side of convex lens 650, and in order to make the light of the light of tool first polarization state or tool second polarization state, one of them passes through.
Therefore for the first primary colour beam 110 of tool first polarization state, the polarization plates of liquid crystal area 642 and 644 can be selected to allow the light of tool 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.After first primary colour beam 110 of tool first polarization state arrives liquid crystal area 642 and 644, the light beam being positioned at liquid crystal area 642 will change the first primary colour beam 110 of tool second polarization state into, and the light beam being positioned at liquid crystal area 644 will maintain the first primary colour beam 110 of tool first polarization state, but the polarization plates because of liquid crystal area 642 and 644 is merely able to allow the light of tool first polarization state pass through, therefore the light being positioned at liquid crystal area 642 will be fallen by gear, and the light being 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.After first primary colour beam 110 of tool first polarization state arrives liquid crystal area 642 and 644, the light beam being positioned at liquid crystal area 642 will maintain the first primary colour beam 110 of tool first polarization state, and the light beam being positioned at liquid crystal area 644 will change the first primary colour beam 110 of tool second polarization state into, therefore the light being positioned at liquid crystal area 644 will be fallen by gear, and the light being positioned at liquid crystal area 642 will pass through.As for liquid crystal area 646 and 648 for the impact of the second primary colour beam 120 of tool second polarization state as the impact of liquid crystal area 642 and 644 for the first primary colour beam 110 of tool first polarization state, therefore just repeat no more.Thus, the first liquid crystal spectral module 600 can produce according to sequential the four road light beams passed through from liquid crystal area 642,644,646 and 648 respectively.
In one or more embodiment, liquid crystal area more can comprise half-wavelength phase delay device (halfwavephaseretardar) to reach the object of above-mentioned light splitting.The polarization state of light beam can change by half-wavelength phase delay device, and the light by 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.
Such as, liquid crystal area 644 and 648 can more comprise half-wavelength phase delay device, and is placed in the side of the incidence surface of liquid crystal area 644 and 648 respectively.Therefore for the first primary colour beam 110 of tool first polarization state, in the first sequential, liquid crystal area 642 and 644 is all in opening.After first primary colour beam 110 of tool first polarization state arrives liquid crystal area 642 and 644, the light beam being positioned at liquid crystal area 642 will change the first primary colour beam 110 of tool second polarization state into.And the light beam arriving the half-wavelength phase delay device of liquid crystal area 644 first can change the first primary colour beam 110 of tool second polarization state into, rear arrival liquid crystal area 644 after transform back into the first primary colour beam 110 of tool first polarization state once again.Polarization plates because of liquid crystal area 642 and 644 is merely able to allow the light of the first polarization state pass through, and the light being therefore positioned at liquid crystal area 642 will be fallen by gear, and the light being positioned at liquid crystal area 644 will pass through.
In next sequential, liquid crystal area 642 and 644 is all in closed condition.After first primary colour beam 110 of tool first polarization state arrives liquid crystal area 642 and 644, the light beam being positioned at liquid crystal area 642 will maintain the first primary colour beam 110 of tool first polarization state, and the light beam arriving the half-wavelength phase delay device of liquid crystal area 644 can change the first primary colour beam 110 of tool second polarization state into, after arriving liquid crystal area 644 afterwards, still maintain the first primary colour beam 110 of tool second polarization state.Therefore the light being positioned at liquid crystal area 644 will be fallen by gear, and the light being positioned at liquid crystal area 642 will pass through.As for liquid crystal area 646 and 648 for the impact of the second primary colour beam 120 of tool second polarization state as the impact of liquid crystal area 642 and 644 for the first primary colour beam 110 of tool first polarization state, therefore just repeat no more.Thus, the first liquid crystal spectral module 600 can produce according to sequential the four road light beams passed through from liquid crystal area 642,644,646 and 648 respectively.
It should be noted, the spectroscopic modes of above-mentioned liquid crystal slot set 640 is only illustration, and is not used to limit the present invention, and persond having ordinary knowledge in the technical field of the present invention, should look actual needs, the spectroscopic modes of Flexible Design liquid crystal slot set 640.
Second liquid crystal spectral module 700 comprises catoptron 710 and 730, liquid crystal slot set 720, prism 740 and 760 and photomodulator 750.First first primary colour beam 110 of tool second polarization state and the second primary colour beam 120 of tool 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 second primary colour beam 120 of the first primary colour beam 110 of the second polarization state and the first polarization state will be directed to two adjacent liquid crystal areas respectively.Light beam is by forming four road light beams according to sequential after liquid crystal slot set 720, and these light beams are directed to photomodulator 750 by prism 740.The light that four road light beams are tool different images modulated respectively by photomodulator 750, after spread out of the second liquid crystal spectral module 700 via prism 760 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, four road light beams can be divided into respectively by the light beam of the first liquid crystal spectral module 600 and the second liquid crystal spectral module 700.After this eight roads light beam becomes image light, reach arbitrary image light source region 852 of projection lens 850 li respectively through polarization closes optical element 800, therefore in same projection lens 850, eight images can be produced according to sequential.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, the switching rate of photomodulator 670 and 750 only needs higher than 240Hz respectively, and eight images can reach the minimum requirements (each image is minimum needs 60Hz) of image renewal rate.
Fig. 6 is the schematic diagram of projection lens 850 in time projecting in Fig. 5.Projection lens 850 can 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 projected from projection lens 850.Image on diffuser plate 920 is dispersed by arbitrary cylindrical lens 932 of cylindrical lens group 930.Therefore, when the eyes of audience are positioned at arbitrary Viewing Area I-I of sightingpiston 950, wantonly two images projected from projection lens 850 can just be received, to experience stereopsis.
Although the present invention discloses as above with embodiment; but itself and be not used to limit the present invention; anyly have the knack of this those skilled in the art; 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 (9)
1. a display light source, comprises:
One light source, in order to provide a light beam;
Color 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, rotate in order to drive this colour wheel, this light beam is made to beat echo area in this first path district, the echo area at least one filtering district and this second path district, in these districts of at least one filtering district at least one, when this light beam is beaten when at least one filtering district in this first path district, this light beam is by least one filtering district by this first path district, and be filtered at least one first primary colour beam accordingly, when this light beam is beaten when this echo area in this first path district, this light beam will be reflected back this optical module, and this light beam after reflection can be directed at least one filtering district in this second path district by this optical module, make this light beam after reflecting by least one filtering district in this second path district, and be filtered at least one second primary colour beam accordingly,
Wherein this optical module comprises:
One isoceles triangle prism, the bottom surface of this isoceles triangle prism is a plane of refraction;
A pair prism wedge, this is an incidence surface to a long side surface of prism wedge, and this is to another long side surface of 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, the light of this plane of refraction from these lumbar triangle prisms can be focused to this colour wheel by this collector lens, and the photoconduction of the described echo area from this first path district and this second path district can be caused this plane of refraction of this isoceles triangle prism.
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 aligns along the radial direction of this colour wheel and this echo area in this second path district.
4. display light source as claimed in claim 2, wherein this echo area in this first path district aligns along the radial direction of this colour wheel and this filtering district in this second path district.
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, the angle between two long side surfaces of wherein arbitrary described prism wedge meets following equation:
θ=-tan
-1((ncos3 φ+sin φ)/(nsin3 φ+cos φ)), wherein θ is the angle between two long side surfaces of arbitrary described prism wedge, n is this isoceles triangle prism and this is to the refractive index of prism wedge, and φ is the angle at arbitrary base angle of this isoceles triangle prism.
8. display light source as claimed in claim 1, wherein this collector lens is collimating lens.
9. 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 CN103728726A (en) | 2014-04-16 |
| CN103728726B true 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 |
|---|---|
| CN103728726A (en) | 2014-04-16 |
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