CN203786454U - Illumination system and projection device - Google Patents
Illumination system and projection device Download PDFInfo
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- CN203786454U CN203786454U CN201420010730.5U CN201420010730U CN203786454U CN 203786454 U CN203786454 U CN 203786454U CN 201420010730 U CN201420010730 U CN 201420010730U CN 203786454 U CN203786454 U CN 203786454U
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- 238000005286 illumination Methods 0.000 title abstract description 4
- 230000003287 optical effect Effects 0.000 claims abstract description 73
- 230000035515 penetration Effects 0.000 claims description 36
- 238000007598 dipping method Methods 0.000 claims description 8
- 238000009826 distribution Methods 0.000 abstract description 24
- 230000000694 effects Effects 0.000 abstract description 5
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 14
- YNPNZTXNASCQKK-UHFFFAOYSA-N phenanthrene Chemical compound C1=CC=C2C3=CC=CC=C3C=CC2=C1 YNPNZTXNASCQKK-UHFFFAOYSA-N 0.000 description 10
- 230000000149 penetrating effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- 238000000034 method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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Abstract
An illumination system comprises a light source module and a refraction component group. The light source module provides an area source for an object plane. The refraction component group projects the area source on the object plane on an image plane. The refraction component group has an aspheric plane, so that the radius of a root-mean square of a central light spot generated by one point of the area source at an intersection of the image plane and the optical axis of the refraction component group is larger than the average of radiuses of root-mean squares of a plurality of edge light spots generated by other points of the area source on the edge of the image plane, thereby providing the area source of which the central brightness is larger than the edge brightness in terms of brightness distribution, and further compensating an effect that the degree of the edge brightness is decreased greatly due to a screen.
Description
Technical field
The utility model relates to a kind of optical system and display device, and particularly relevant for a kind of illuminator and projection arrangement.
Background technology
Under the development of science and technology now, the display device of large scale, high-res is mostly the video wall (Video wall) that the display device by some is spliced.Owing to needing to have the consistance of color and brightness in the splicing of a plurality of display device, so back-projection system (Rear-projection system) becomes the technical scheme of applicable video wall by the consistance on its light source.
In order to promote brightness that observer sees and the uniformity coefficient of color, the penetration screen of back-projection system substantially all has a slice phenanthrene and pinches your lens (Fresnel lens) and a slice lens pillar (Lenticular lens), phenanthrene is pinched chief ray (chief ray) shaping of dispersing that your lens send projection lens becomes vertical screen direction, lens pillar receives from phenanthrene and pinches the light of your lens and control the subtended angle of beam projecting screen, namely increases the visible angle of screen.
In the uniformity coefficient of screen intensity, best uniformity coefficient is 100%ANSI(American National Standards Institute) uniform luminance distribution, namely the brightness of whole screen-picture is in full accord.Yet the light that back-projection system sends, when penetrating penetration screen, can be created in the characteristic that center brightness in Luminance Distribution is better than periphery brightness.That is to say, due to the periphery of penetration screen, because the increase of angle of incidence of light degree, its light quantity that penetrates penetration screen also reduces relatively, so the periphery brightness of penetration screen reduces.This phenomenon is more aobvious serious in short Jiao's optical projection system, also therefore cannot design by the projection of short burnt formula the back-projection system of small size, wherein yet has extra electric signal and processes to improve this phenomenon and then increase its cost of manufacture.
United States Patent (USP) has disclosed a kind of rear projection display apparatus No. 5868481, and United States Patent (USP) has disclosed a kind of lamp optical system No. 4824225, and United States Patent (USP) has disclosed a kind of optical projection system No. 7023619.
Utility model content
The utility model provides a kind of illuminator, its be suitable for providing one in Luminance Distribution central brightness be greater than the area source of edge brightness, and then the edge brightness that causes of the compensation screen more effect that detracts.
The utility model provides a kind of projection arrangement, and it is suitable for providing an image with uniform luminance.
An embodiment of the present utility model provides a kind of illuminator, comprise a light source module and a dioptric element group, light source module provides an area source on an object plane, dioptric element group is projeced into a picture plane by the area source being positioned on object plane, wherein dioptric element group has an aspheric surface, so that be a bit greater than the mean value of the r.m.s. radius of other on area source a plurality of edges hot spots of producing at the edge as plane at the r.m.s. radius of a centre spot of the intersection place of the optical axis as plane and dioptric element group generation on area source.
An embodiment of the present utility model provides a kind of projection arrangement, comprises a light valve, an illuminator, a projection lens and a penetration screen.Illuminator comprises a light source module and a dioptric element group, light source module provides an area source on an object plane, dioptric element group is projeced into the area source being positioned on object plane on the active surface of light valve, wherein dioptric element group has an aspheric surface, so that be a bit greater than the mean value of the r.m.s. radius of other on area source a plurality of edges hot spots of producing at the edge of active surface at the r.m.s. radius of a centre spot of the intersection place generation of an optical axis of active surface and dioptric element group on area source.Light valve converts area source to an image strip, and projection lens is disposed on the bang path of image strip, and penetration screen is disposed on the bang path from the image strip of projection lens.
In an embodiment of the present utility model, dioptric element group comprises a plurality of lens of being arranged toward picture plane (active surface) from object plane, and the surface towards picture plane (active surface) of the lens of the most close picture plane (active surface) is aspheric surface, or the surface towards object plane of the lens of close object plane is aspheric surface.
In an embodiment of the present utility model, light source module comprises a light-emitting component and a light uniformization element, light-emitting component is in order to send an illuminating bundle, and light uniformization element is disposed on the bang path of illuminating bundle, and wherein object plane is positioned at the bright dipping side of light uniformization element.
In an embodiment of the present utility model, how much spot radius (Geometric spot radius) of centre spot are large compared with the mean value of how much spot radius of these edge hot spots.
In an embodiment of the present utility model, illuminator meets I
1/ I
0>1.05, wherein I
0for the relative exposure of picture plane (active surface) with the optical axis confluce of dioptric element group, and I
1relative exposure for picture plane (active surface) edge.
In an embodiment of the present utility model, centre spot and these edge hot spots respectively have a border circular areas, the center of circle of these border circular areas is positioned at the central point of centre spot and these edge hot spots separately, and the luminous energy having in the border circular areas of centre spot accounts for the α % of total luminous energy of centre spot, the luminous energy having in the border circular areas of each edge hot spot in these edge hot spots accounts for the α % of total luminous energy of edge hot spot, wherein the radius of the border circular areas of centre spot is greater than the radius of the border circular areas of each edge hot spot, and 50≤α≤95.
In an embodiment of the present utility model, the part of the optical axis near dioptric element group of aspheric surface is a curved concave, and the part of the optical axis away from dioptric element group of aspheric surface is a toroidal bend convex surface around curved concave.
In an embodiment of the present utility model, the part near the optical axis of dioptric element group of aspheric surface is a surface for projection slightly, and the part of the optical axis away from dioptric element group of aspheric surface is one around the surperficial toroidal bend convex surface of projection slightly.Wherein, the side-play amount of the each point that in aspheric surface, R value is 0.3 (sag value) ratio is less than 0.1, the side-play amount ratio of the each point that in aspheric surface, R value is 0.5 is less than 0.2, the side-play amount ratio of the each point that in aspheric surface, R value is 0.7 is less than 0.5, wherein in aspheric surface, the R value of any is point and the ratio of the distance of optical axis and the ultimate range of aspheric surface and optical axis, and the side-play amount ratio of point is the side-play amount of the point on optical axis direction in aspheric surface and the ratio of the maximum offset of aspheric surface on optical axis direction.
In an embodiment of the present utility model, aspheric surface meets aspheric surface formula
Wherein Z is the side-play amount on optical axis direction in aspheric surface, and c is the inverse of the radius of osculating sphere, and K is quadric surface coefficient, and y is the side-play amount in the direction of vertical aspheric optical axis, and A
1, A
2, A
3, A
4, A
5for asphericity coefficient, wherein-0.025<c<-0.005 and-500<K<-40, A
1, A
2, A
3, A
4, A
5in at least one of them is contrary with the sign of c, the corresponding Z value in position of the y=0 of aspheric surface is not maximal value, aspheric surface comprises that a slope is 0 position, slope is that 0 position refers to the position that Z is 0 with respect to the first order derivative of y, and the position that slope is 0 is to drop on y=0.3 γ to y=0.7 γ place, wherein γ be aspheric surface with respect to optical axis the ultimate range in y direction (maximum radius).
In an embodiment of the present utility model, dioptric element group comprises at least one catoptron, and the aspheric surface reflecting surface that is catoptron.
In an embodiment of the present utility model, penetration screen comprises a Fresnel Lenses surface and lens pillar surface, Fresnel Lenses surface configuration is on the bang path of image strip, lens pillar surface configuration is on the bang path of the image strip from Fresnel Lenses surface, wherein lens pillar surface has a plurality of column microlens structures, each column microlens structure extends along a first direction, and these column microlens structures are arranged along a second direction.
In an embodiment of the present utility model, projection arrangement also comprises an inner full-reflection prism, is disposed on the light path between dioptric element group and light valve, be disposed on the bang path of image strip, and between light valve and projection lens.
Based on above-mentioned, illuminator in embodiment of the present utility model and projection arrangement are by the aspheric surface of above-mentioned dioptric element group, can make area source that light source module provides in Luminance Distribution, there is the characteristic that edge brightness is greater than central brightness penetrating after thering is aspheric dioptric element group, and then the edge brightness that causes of the compensation screen more effect that detracts.Thus, when image strip penetrates after penetration screen, just can produce the uniform image of a brightness.
Accompanying drawing explanation
For above-mentioned feature and advantage of the present utility model can be become apparent, special embodiment below, and coordinate accompanying drawing to be described in detail below:
Figure 1A is the schematic diagram of illuminator in embodiment of the present utility model.
Figure 1B is from the past front elevation as in-plane of dioptric element group in embodiment of the present utility model.
Fig. 2 is the sectional view that in the first embodiment of the present utility model, surface has aspheric lens.
Fig. 3 A is the schematic diagram of projection arrangement in the first embodiment of the present utility model.
Fig. 3 B is the schematic diagram of projection arrangement in another embodiment of the present utility model.
Fig. 4 is a sectional view with aspheric lens in the utility model one embodiment.
Fig. 5 is about the graph of a relation of aspheric surface offsets amount in the utility model one embodiment.
Fig. 6 is the schematic diagram of relative exposure (Relative illumination) on the active surface of light valve in projection arrangement in the first embodiment of the present utility model.
Fig. 7 A is for the front elevation of the active surface of light valve in the first embodiment of the present utility model.
Fig. 7 B is for the hot spot schematic diagram of each point on the active surface of light valve in the first embodiment of the present utility model.
Fig. 8 is the light energy distribution figure corresponding in the first embodiment of the present utility model as each hot spot on the active surface of plane or light valve.
Fig. 9 is the partial schematic diagram of projection arrangement in another embodiment of the present utility model.
Figure 10 is the partial schematic diagram of projection arrangement in another embodiment of the present utility model.
Embodiment
Figure 1A is the schematic diagram of illuminator in embodiment of the present utility model, and Figure 1B is from the past front elevation as in-plane of dioptric element group in embodiment of the present utility model.Please refer to Figure 1A and Figure 1B, illuminator 100 comprises light source module 110 and dioptric element group 120, and wherein light source module 110 provides an area source (not shown) at object plane 121, from the illuminating bundle L of area source
1from object plane 121, enter dioptric element group 120, dioptric element group 120 is projeced into picture plane 123 by the area source being positioned on object plane 121.Please refer to Figure 1A and Figure 1B, in the present embodiment, dioptric element group 120 has aspheric surface 122, and it is configured near as plane 123 and in the face of as one end of plane 123 and be suitable for illuminated light beam L
1penetrate, aspheric surface 122 is suitable for allowing a bit at least forming in the confluce as plane 123 and the optical axis B of dioptric element group 120 on area source be positioned at as the centre spot 130 of plane 123 middle sections and be suitable for allowing other points of area source form a plurality of edge hot spot 132(in the present embodiment as plane 123 upper edge region, Figure 1B illustrates three edge hot spots as signal), and the r.m.s. of centre spot 130 (Root Mean Square, RMS) radius is greater than the mean value of the r.m.s. radius of these edge hot spots 132, therefore in the illuminator 100 of the present embodiment, light beam from the area source on object plane 121 has in the Luminance Distribution as in plane 123 characteristic that edge brightness is greater than central brightness.
In more detail, the illuminator 100 of the present embodiment provides a kind of illuminating bundle L of the characteristic that generation center is dark in Luminance Distribution, edge is brighter on as plane 123
1and this specific character to be suitable for being applied in be for example on penetration projection screen, the characteristic that is greater than central brightness by above-mentioned edge brightness can not affect the uniformity coefficient after penetrating because of the difference of incident angle in light beam after can allowing the light beam from area source penetrate optical element.In other words, illuminating bundle L in the present embodiment
1after penetrating as plane, for example arrive a penetration screen, it has a plurality of optical microstructures and is distributed in surface, as light beam L
1while being delivered to the one side of penetration screen, in the surrounding of penetration screen (that is away from optical axis B fringe region), be easy to because the angle of light beam incident screen is compared with large and have and penetrate inefficient light compared with the light in center Screen region and penetrate efficiency, namely the other one side at screen can present the image that edge brightness is lower, therefore the light beam that, has by light source module provide in the present embodiment a characteristic that center is dark, edge is brighter in Luminance Distribution can effectively improve the shown luminance uniformity going out of screen.
Fig. 2 is the sectional view that in the first embodiment of the present utility model, surface has aspheric lens.Please refer to Fig. 2, the optical element of one of them in the dioptric element group 120 that in the present embodiment, lens 220 are Fig. 1, lens 220 have an aspheric surface 122, and near dioptric element group 120(, illustrate as Fig. 1 in aspheric surface 122) the part of optical axis B be a curved concave, and in aspheric surface 122, away from dioptric element group 120(, illustrate as Fig. 1) the part of optical axis B be a toroidal bend convex surface around above-mentioned curved concave, that is this aspheric surface 122 is for having the surface of contrary flexure speciality.In more detail, with reference to Fig. 2, the present embodiment is according to z direction d2 and y direction d1, aspheric surface 122 coincidence formulas
Wherein Z is the side-play amount on z direction d2, and c is the inverse of the radius of osculating sphere, and K is quadric surface coefficient, and y is the side-play amount on y direction d1, and A
1, A
2, A
3, A
4, A
5for asphericity coefficient, wherein-0.025<c<-0.005 and-500<K<-40, and asphericity coefficient A
1, A
2, A
3, A
4, A
5in at least one of them is contrary with the sign of the c reciprocal of the radius of osculating sphere, aspheric surface is not maximal value in the corresponding z value in the position of y=0, aspheric surface comprises that a slope is 0 position, slope is that 0 position refers to the position that z is 0 with respect to the first order derivative of y, and the position that slope is 0 is the scope that drops on y=0.3 γ to y=0.7 γ, its middle distance γ be aspheric surface with respect to optical axis the ultimate range in y direction (maximum radius).In other words, please refer to Fig. 2, in the present embodiment, the variation by the aspheric surface 122 of lens 220 in the radius-of-curvature with respect to optical axis B, makes to penetrate aspheric surface 122 and near the surperficial light beam of optical axis B, concentrates compared with aspheric surface 122 away from the surperficial light beam of optical axis B.
Fig. 3 A is the schematic diagram of projection arrangement in the first embodiment of the present utility model, and Fig. 3 B is the schematic diagram of projection arrangement in another embodiment of the present utility model.Please refer to Fig. 3 A, projection arrangement 300 in the first embodiment of the present utility model has illuminator, light valve 310, inner full-reflection prism 330, projection lens 320 and penetration screen 340, illuminator comprises light source module 110 and dioptric element group 120, and light source module 110 comprises light-emitting component 112 and light uniformization element 114.Dioptric element group 120 comprises that lens 210A, lens 210B, lens 210D, lens 210E, catoptron 210C and surface have the lens 220 of aspheric surface 122.In the present embodiment, lens 220 have the cross section identical with Fig. 2, and the aspheric surface 122 of lens 220 is identical with the aspheric surface of Fig. 2 in variation and the accessible effect of radius-of-curvature, but is not limited to this.In other embodiments, the aspheric surface 122 of lens 220 more can have at its curved concave and toroidal bend convex surface other radius-of-curvature.In the present embodiment, light-emitting component 112 is for example light-emittingdiode (Light Emitting Diode, LED), but be not limited to this, in other embodiments light-emitting component can be more organic light emitting diode (Organic Light Emitting Diode, OLED) etc. other be suitable for sending the element of light beam.In the present embodiment, light uniformization element 114 is for example solid or hollow optical integration pillar, but is not limited to this, in other embodiments light uniformization element can be more lens arra etc. other be suitable for the optical element of the light beam that homogenising sends from light-emitting component 112.
First for the part of illuminator in the utility model the first embodiment, in the present embodiment, please refer to Fig. 3 A, light-emitting component 112 sends an illuminating bundle L
2to light uniformization element 114, light beam L
2from the bright dipping side 116 of light uniformization element 114, be issued to dioptric element group 120 again.In more detail, light uniformization element 114 provides an area source in bright dipping side 116 in the present embodiment, that is to say that the object plane system of illuminator in the present embodiment is positioned at the bright dipping side 116 of light uniformization element 114.Please refer to Fig. 3 A, illuminating bundle L
2the lens 210A, the lens 210B that sequentially penetrate dioptric element group 120 are reflected mirror 210C reflection, the light beam L after reflection again
2sequentially penetrate lens 210D, lens 210E and lens 220 arrival inner full-reflection prisms 330, inner full-reflection prism 330 is by light beam L again
2reflex to light valve 310.In other words, the dioptric element group 120 of the present embodiment is by light beam L
2from the bright dipping side 116(object plane of the present embodiment namely) project an active surface 223 of light valve 310, active surface 223 can be rectangle, and the active surface 223 of light valve herein 310 is the picture plane that is positioned at dioptric element group 120.That is to say, in the present embodiment light beam L
2therefore because there is the aspheric surface 122 that penetrates lens 220, arrive the namely picture plane of the present embodiment of active surface 223() time illuminating bundle L
2in Luminance Distribution, there is the characteristic that edge brightness is greater than central brightness.
Then, in the first embodiment of the present utility model, illuminating bundle L
2after getting to the active surface 223 of light valve 310, be reflected as image strip L
3, image strip L
3sequentially penetrate inner full-reflection prism 330 and projection lens 320 and arrive penetration screen 340, here because light beam L
2in Luminance Distribution, there is the characteristic that edge brightness is greater than central brightness, therefore the image strip L after active surface 223 reflections by light valve 310
3also can in Luminance Distribution, there is the characteristic that corresponding edge brightness is greater than central brightness.In the present embodiment, lens 220 are the lens of the most close inner full-reflection prism 330 in dioptric element group 120, and the aspheric surface 122 of lens 220 is a side the face inside total reflection prisms 330 that are configured near inner full-reflection prism 330, but the configuration of above-mentioned aspheric surface in dioptric element group 120 is not limited to this.Please refer to Fig. 3 B, in other embodiments, lens 220 are the lens of the most close light uniformization element 114 in dioptric element group 120, and the aspheric surface 122 of lens 220 can also be disposed near one end of light uniformization element 114 and in the face of light uniformization element 114.Please refer to Fig. 3 A and Fig. 3 B, penetration screen 340 has phenanthrene and pinches your lens (Fresnel Lens) surface 342 and lens pillar (Lenticular lens) surface 344, phenanthrene is pinched your lens surface 342 and is suitable for allowing the light beam projecting from projection lens 320 focus on and collimate, and lens pillar surface 344 for example has a plurality of column microlens structures 346 parallel to each other, and these column microlens structures 346 are along second direction d
3arrange, and each column microlens structure 346 is along perpendicular to second direction d
3first direction extend (with reference to Fig. 3 A and Fig. 3 B, illustrate, first direction is for example the direction that vertically passes paper or vertically penetrate paper).Specifically, please refer to Fig. 3 A, in the present embodiment image strip L
3for example comprise light beam L
4and light beam L
5after arriving penetration screen 340, sequentially penetrate Fresnel Lenses surface 342 and lens pillar surface 344, and Fresnel Lenses surface 342 is suitable for to light beam L
4and light beam L
5focus on and collimation, and lens pillar surface 344 is suitable for divergent beams L
4and light beam L
5, be for example wherein light beam L
4angle on the light beam incident Fresnel Lenses surface 342 near penetration screen 340 fringe regions is more for example light beam L
5deng large near the beam incident angle degree of penetration screen 340 middle sections, thus the light of the fringe region of penetration screen 340 penetrate efficiency with respect to the light of the middle section of penetration screen 340, penetrate efficiency can be lower, and the above-mentioned image strip L that arranges in pairs or groups again
3in Luminance Distribution, there is the characteristic that edge brightness is greater than central brightness, therefore, image strip L
3penetrated after penetration screen 340, and still can be subject to the compensation of penetration screen 340 and form the uniform image of brightness.
Fig. 4 is a sectional view with aspheric lens in the utility model one embodiment.Please refer to Fig. 4, in the present embodiment, lens 222 have aspheric surface 124, and aspheric surface 124 please refer to Fig. 1 near dioptric element group 120() the part of optical axis B be a surface for projection slightly, and aspheric surface 124 please refer to Fig. 1 away from dioptric element group 120() the part of optical axis B be one around the surperficial toroidal bend convex surface of projection slightly.Specifically, Fig. 5 is about the graph of a relation of aspheric surface offsets amount in the utility model one embodiment, please refer to Fig. 4 and Fig. 5, distance in the aspheric surface 124 that wherein transverse axis R is Fig. 4 a bit and between optical axis B is divided by the value apart from γ, wherein, the value apart from γ is the ultimate range (maximum radius) of this aspheric surface 124 and optical axis B; And the longitudinal axis of Fig. 5 is off-set value (sag value) in optical axis B direction a bit in the aspheric surface 124 of Fig. 4, its be in aspheric surface 124 a bit with the axial distance of the straight line E value divided by distance h, wherein h value be in aspheric surface 124 a bit with the maximum axial distance of straight line E, and straight line E is perpendicular to optical axis B.In more detail, aspheric surface 124 is in the present embodiment less than 0.1 in its off-set value of the position of R=0.3 (sag value), in its off-set value of the position of R=0.5 (sag value), is less than 0.2, and in the position of R=0.7, its off-set value is less than 0.5.
Feature by the curvature of said lens 222, the utility model in other embodiments can similar Fig. 3 A and Fig. 3 B configuration, precisely because difference is lens 122 to be replaced as lens 222, for example lens 222 are in Fig. 3 A configuration, aspheric surface 124 is also towards inner full-reflection prism 330, and lens 222 are in Fig. 3 B configuration, aspheric surface 124 is also towards the even element 114 of light.In more detail, again in the lump with reference to Fig. 2 and Fig. 4, in embodiment of the present utility model, the surface curvature characteristic of aspheric surface 122 and aspheric surface 124 all has and can make light beam penetrate near behind the place of optical axis, there is lower optical energy density, and light beam is penetrated behind the place away from optical axis, there is higher optical energy density.Again furthermore, with reference to Fig. 3 A, in embodiment of the present utility model, projection arrangement 300 is because having above-mentioned aspheric surface is for example aspheric surface 122 or aspheric surface 124, and can make is for example light beam L
4amount relatively increase, and be for example light beam L
5amount relatively reduce, therefore can make the original screen that can present brightness irregularities because of the angle of refraction, reflection and the light beam incident screen of light beam in screen present the picture with uniform luminance.Further, the projection arrangement 300 of the present embodiment is for example rear-projection display device.
Next describe the effect that in embodiment of the present utility model, illuminator and projection arrangement can be reached in detail by collocation is graphic.Fig. 6 is the schematic diagram of relative exposure (Relative illumination) on the active surface of light valve in projection arrangement in the first embodiment of the present utility model, please refer to Fig. 3 A and Fig. 6, by being for example that the above-mentioned lens with aspheric surface 122 220 of the utility model or the lens 222 with aspheric surface 124 can make light beam L in projection arrangement
2it is for example the distribution relation of Fig. 6 that relative exposure on active surface 223 has, wherein the transverse axis of Fig. 6 be for example on active surface 223 reference point apart from light beam L
2the side-play amount of optical axis.In more detail, in the first embodiment of the present utility model, dioptric element group 120 can make the area source that light source module 110 sends at the relative exposure of the fringe region of picture plane (active surface 223), be greater than the relative exposure of central area, and the relative exposure of fringe region is greater than 1.05 divided by the relative exposure of central area.
Fig. 7 A be in the first embodiment of the present utility model for the front elevation of the active surface 223 of light valve, Fig. 7 B is for the hot spot schematic diagram of each point on the active surface 223 of light valve in the first embodiment of the present utility model.Please with reference to Fig. 7 A and Fig. 7 B, in the present embodiment, in Fig. 7 B, spot pattern has the distribution plan that wavelength is the light beam of 460nm, 540nm and 620nm, wherein edge hot spot distribution plan 501～508 corresponds to the edge light field 401～408 of active surface 223 upper edge region of light valve in Fig. 7 A separately, and centre spot distribution plan 509 corresponds to the central light field 409 of middle section on the active surface 223 of light valve in Fig. 7 A.With reference to Fig. 7 A and Fig. 7 B, can find out that the first embodiment of the present utility model is greater than the mean value of the r.m.s. radius of edge light field 401～408 at the r.m.s. radius (RMS radius) of central light field 409, and in the first embodiment, how much spot radius (Geometric spot radius) of central light field 409 are greater than the mean value of how much spot radius of edge light field 401～408.
The projection arrangement of the first embodiment of the present utility model is for (the American Nation Standards Institute of ANSI, ANSI) ordered light uniformity coefficient Mingguang City bundle penetrates the light uniformity coefficient of the position (plane) after penetration screen, wherein, when projection arrangement has above-mentioned aspheric surface but do not have penetration screen, the result of the light uniformity coefficient that it is corresponding is as following table.
In addition, when only thering is penetration screen but not thering is aspheric surface, be determined as follows table
Finally, there is at the same time aspheric projection arrangement and the situation of the penetration screen of arranging in pairs or groups under be determined as follows table
The formed imaging surface of light beam that does not have penetration screen in the present embodiment or penetrated after penetration screen is on average divided into the next reference point as measuring brightness of central point in Shi Ge region, nine regions with nine grids herein, add and respectively the distance of the central point of four drift angles and imaging surface is got to four points of 1/10th as the reference point that measures brightness, 13 reference point are calculated altogether.Please refer to table, wherein nine lattice in the middle of each table are the brightness that corresponds to nine blocks that light beam cuts apart with nine grids, and outermost four lattice are the brightness values of corner location that corresponds to 1/10th distances of four drift angles and central point.In addition, ANSI light uniformity coefficient is the mean value of relative brightness in nine points cutting apart divided by nine grids with the minimum value of four corresponding relative brightnesses of drift angle.By above table, can be found out, while thering is at the same time penetration screen and aspheric surface, can allow the light uniformity coefficient value of ANSI of projection arrangement of the present embodiment more approach 100%, namely the luminance uniformity of more approaching the best.
Fig. 8 is the light energy distribution figure that corresponds to each hot spot on picture plane or active surface in the first embodiment of the present utility model, the picture plane that each coordinate that wherein Fig. 8 top illustrates corresponds to for each lines or the coordinate points of active surface.In other words, each coordinate points of Fig. 8 top is all the central point of a hot spot, transverse axis is represented as with respect to the radius of the central point of hot spot, the longitudinal axis and is represented as the ratio that the energy that border circular areas was comprised being drawn with above-mentioned radius accounts for total light spot energy, and the center of circle of above-mentioned border circular areas is also all positioned at the central point of hot spot.With reference to Fig. 8, can find out on picture plane or active surface, centre mount is designated as the radius that accounts for the border circular areas that gross energy 50%～95% distributes in the centre spot of data line representative of (0.000,0.000) and all compared with the radius of other eight corresponding border circular areas of edge hot spot, wants large.
Fig. 9 is the partial schematic diagram of projection arrangement in another embodiment of the present utility model.In the present embodiment, please refer to Fig. 1 and Fig. 9, from object plane, the active surface toward light valve 670 sequentially has first lens 610 to projection arrangement 600, the second lens 620, the 3rd lens 630, catoptron 640, non-spherical lens 650, and inner full-reflection prism 660, illuminating bundle L2 equally sequentially penetrates and arrives light valve 670 from object plane according to the order of above-mentioned these optical elements, wherein first lens 610 has first surface S1 and second surface S2, the second lens 620 have the 3rd surperficial S3 and the 4th surperficial S4, the 3rd lens 630 have the 5th surperficial S5 and the 6th surperficial S6, catoptron 640 has reflecting surface, non-spherical lens 650 has the first aspheric surface S7 and the second aspheric surface S8, and first lens 610 is convex surface (second surface S2) concave-convex lens of object plane dorsad, the second lens 620 are convex surface (the 4th surperficial S4) meniscuses of object plane dorsad, the 3rd lens 630 are biconvex lens, the second aspheric surface S8 of non-spherical lens 650 is towards active surface.Following content will be enumerated an embodiment of projection arrangement 600, and wherein asphericity coefficient A1, A2, A3, A4, A5 also can be with reference to above-mentioned aspheric surface formula
The surperficial S10 of inner full-reflection prism 660 does not illustrate at Fig. 9, surface S10 is the inner full-reflection face of inner full-reflection prism 660 the insides, and listed data information is not in order to limit the utility model in following table one, table two and table three, under any, in technical field, have and conventionally know that the knowledgeable is after with reference to the utility model, when doing suitable change to its parameter or setting, precisely because must belong in category of the present utility model.
(table)
(table two)
(table three)
Above in table one, table two and table three, spacing means the air line distance on optical axis between two adjacently situated surfaces, for instance, the spacing of surperficial S1, surperficial S1 is to the air line distance on optical axis B between surperficial S2.And half bore (Semi-diameter) means a half value in the aperture on a surface.
Figure 10 is the partial schematic diagram of projection arrangement in another embodiment of the present utility model.Please refer to Figure 10, in the present embodiment, projection arrangement 700 has lens 710, lens 720, lens 730, lens 750 and catoptron 740, aspheric surface is the reflecting surface of catoptron 740, and it equally has, and can to correspond in above-mentioned other embodiment of the utility model be for example that the radius-of-curvature of aspheric surface 122 or aspheric surface 124 distributes.Therefore the radius-of-curvature that the present embodiment has by the reflecting surface of catoptron 740 distributes to make the illuminating bundle L2 after reflection can in Luminance Distribution, have the characteristic that edge brightness is greater than central brightness.
In sum, in embodiment of the present utility model, by aspheric design in dioptric element group, allow an area source can when arriving an active surface as plane or a light valve, in Luminance Distribution, there is the characteristic that edge brightness is greater than central brightness.In more detail, in embodiment of the present utility model by aspheric surface can provide one in Luminance Distribution central authorities toward the cumulative light beam of edge brightness, and project to a penetration screen can compensate screen fringe region because incident angle compared with impact large and Luminance Distribution inequality that bring, then and then the image with optimal brightness uniformity coefficient is provided; Projection arrangement in the utility model is rear-projection display device, can be applicable to the tiled display system (Video Wall System) being formed by least two group rear-projection display devices, utilize light beam that each projection arrangement projects in Luminance Distribution, to there is edge brightness and be greater than the characteristic of central brightness and see through the compensation of corresponding penetration screen and form the uniform image of brightness, and then make tiled display system also there is brightness to splice uniformly image frame.
Although the utility model discloses as above with embodiment; so it is not in order to limit the utility model; under any, in technical field, have and conventionally know the knowledgeable; within not departing from spirit and scope of the present utility model; when doing a little change and retouching, therefore protection domain of the present utility model is when being as the criterion depending on the accompanying claim person of defining.
Reference numerals list
B: optical axis
H, γ: distance
D1, d2, d3: direction
E: straight line
L
1, L
2: illuminating bundle
L
3: image strip
L
4, L
5: light beam
S1, S2, S3, S4, S5, S6, S7, S8, S9: surface
100: illuminator
110: light source module
112: light-emitting component
114: light uniformization element
116: bright dipping side
120: dioptric element group
121: object plane
122,124: aspheric surface
123: as plane
130: centre spot
132: edge hot spot
210A、210B、210C、210D、210E、220、222、610、620、630、650、710、
720,730,750: lens
223: active surface
300: projection arrangement
310,670: light valve
320: projection lens
330: inner full-reflection prism
340: penetration screen
342: Fresnel Lenses surface
344: lens pillar surface
401,402,403,408,405,406,407,408,409: light field
501,502,503,504,505,506,507,508,509: hot spot distribution plan
640,740: catoptron
650: non-spherical lens
Claims (24)
1. an illuminator, comprising: a light source module and a dioptric element group, wherein,
Described light source module provides an area source on an object plane, and
Described dioptric element group, the described area source being positioned on described object plane is projeced into a picture plane, wherein said dioptric element group has an aspheric surface, so that be a bit greater than the mean value of the r.m.s. radius of other on described area source a plurality of edges hot spots of producing at the edge of described picture plane at the r.m.s. radius of a centre spot of the intersection place of a described optical axis as plane and described dioptric element group generation on described area source.
2. illuminator as claimed in claim 1, it is characterized in that: described dioptric element group comprises a plurality of lens from described object plane toward described picture planar alignment, and the surface towards described picture plane of the described lens of the most close described picture plane is described aspheric surface, or the surface towards described object plane of the described lens of close described object plane is described aspheric surface.
3. illuminator as claimed in claim 1, it is characterized in that: described light source module comprises: a light-emitting component and a light uniformization element, described light-emitting component is in order to send an illuminating bundle, described light uniformization element is disposed on the bang path of described illuminating bundle, and wherein said object plane is positioned at the bright dipping side of described light uniformization element.
4. illuminator as claimed in claim 1, is characterized in that: how much spot radius of described centre spot are large compared with the mean value of how much spot radius of described a plurality of edges hot spot.
5. illuminator as claimed in claim 1, is characterized in that: described illuminator meets I
1/ I
0>1.05, wherein I
0for the relative exposure of the described optical axis confluce of described picture plane and described dioptric element group, and I
1relative exposure for described picture horizontal edge.
6. illuminator as claimed in claim 1, it is characterized in that: described centre spot and described a plurality of edges hot spot respectively have a border circular areas, the center of circle of described a plurality of border circular areas is positioned at the central point of described centre spot and described a plurality of edges hot spot separately, and the luminous energy having in the described border circular areas of described centre spot accounts for the α % of total luminous energy of described centre spot, the luminous energy having in the described border circular areas of a plurality of edges hot spot described in each in described a plurality of edges hot spot accounts for the α % of total luminous energy of described edge hot spot, the radius of the described border circular areas of wherein said centre spot is greater than the radius of the described border circular areas of a plurality of edges hot spot described in each, and 50≤α≤95.
7. illuminator as claimed in claim 1, it is characterized in that: the part of the described optical axis near described dioptric element group of described aspheric surface is a curved concave, and the part of the described optical axis away from described dioptric element group of described aspheric surface is a toroidal bend convex surface around this curved concave.
8. illuminator as claimed in claim 1, it is characterized in that: the part near the described optical axis of described dioptric element group of described aspheric surface is a surface for projection slightly, and the part of the described optical axis away from described dioptric element group of described aspheric surface is one around this surperficial toroidal bend convex surface of projection slightly.
9. illuminator as claimed in claim 8, it is characterized in that: the side-play amount ratio of the each point that in described aspheric surface, R value is 0.3 is less than 0.1, the side-play amount ratio of the each point that in described aspheric surface, R value is 0.5 is less than 0.2, the side-play amount ratio of the each point that in described aspheric surface, R value is 0.7 is less than 0.5, in wherein said aspheric surface, the R value of any is the ratio of the distance of described point and described optical axis and the ultimate range of described aspheric surface and described optical axis, the side-play amount ratio of described point is the side-play amount of the described point on optical axis direction in described aspheric surface and the ratio of the maximum offset of described aspheric surface on optical axis direction.
10. illuminator as claimed in claim 1, is characterized in that: described aspheric surface meets aspheric surface formula
Wherein Z is the side-play amount on optical axis direction in described aspheric surface, and c is the inverse of the radius of osculating sphere, and K is quadric surface coefficient, and y is the side-play amount on vertical described aspheric optical axis direction, and A
1, A
2, A
3, A
4, A
5for asphericity coefficient, wherein-0.025<c<-0.005 and-500<K<-40, asphericity coefficient A
1, A
2, A
3, A
4, A
5in at least one of them is contrary with the sign of c, the corresponding Z value in position of the y=0 of described aspheric surface is not maximal value, described aspheric surface comprises that a slope is 0 position, described slope is that 0 position refers to the position that Z is 0 with respect to the first order derivative of y, and the position that described slope is 0 is to drop on y=0.3 γ to y=0.7 γ place, wherein γ be described aspheric surface with respect to described optical axis the ultimate range in y direction.
11. illuminators as claimed in claim 1, is characterized in that: described dioptric element group comprises at least one catoptron, and the described aspheric surface reflecting surface that is described catoptron.
12. 1 kinds of projection arrangements, comprising: a light valve, an illuminator, a projection lens and a penetration screen, and wherein said illuminator comprises: a light source module, an and dioptric element group, wherein said light source module provides an area source on an object plane, and described dioptric element group is projeced into the described area source being positioned on described object plane on one active surface of described light valve, and described dioptric element group has an aspheric surface, so that be a bit greater than the mean value of the r.m.s. radius of other on described area source a plurality of edges hot spots of producing at the edge of described active surface at the r.m.s. radius of a centre spot of the intersection place generation of an optical axis of described active surface and described dioptric element group on described area source, and described light valve converts described area source to an image strip, and
Described projection lens is disposed on the bang path of described image strip, and described penetration screen is disposed on the bang path from the described image strip of described projection lens.
13. projection arrangements as claimed in claim 12, it is characterized in that: described dioptric element group comprises a plurality of lens of being arranged toward described active surface from described object plane, and the surface towards described active surface of the described lens of close described active surface is described aspheric surface, or the surface towards described object plane of the described lens of close described object plane is described aspheric surface.
14. projection arrangements as claimed in claim 12, it is characterized in that: described light source module comprises: a light-emitting component and a light uniformization element, wherein said light-emitting component is in order to send an illuminating bundle, and described light uniformization element is disposed on the bang path of described illuminating bundle, wherein said object plane is positioned at the bright dipping side of described light uniformization element.
15. projection arrangements as claimed in claim 12, is characterized in that: how much spot radius of described centre spot are large compared with the mean value of how much spot radius of described a plurality of edges hot spot.
16. projection arrangements as claimed in claim 12, is characterized in that: described projection arrangement meets I
1/ I
0>1.05, wherein I
0for the relative exposure of the described optical axis confluce of described active surface and described dioptric element group, and I
1relative exposure for described active surface edge.
17. projection arrangements as claimed in claim 12, it is characterized in that: described centre spot and described a plurality of edges hot spot respectively have a border circular areas, the center of circle of described a plurality of border circular areas is positioned at the central point of described centre spot and described a plurality of edges hot spot separately, and the luminous energy having in the described border circular areas of described centre spot accounts for the α % of total luminous energy of described centre spot, the luminous energy having in the described border circular areas of a plurality of edges hot spot described in each in described a plurality of edges hot spot accounts for the α % of total luminous energy of described edge hot spot, the radius of the described border circular areas of wherein said centre spot is greater than the radius of the described border circular areas of a plurality of edges hot spot described in each, and 50≤α≤95.
18. projection arrangements as claimed in claim 12, it is characterized in that: the part of the described optical axis near described dioptric element group of described aspheric surface is a curved concave, and the part of the described optical axis away from described dioptric element group of described aspheric surface is a toroidal bend convex surface around this curved concave.
19. projection arrangements as claimed in claim 12, it is characterized in that: the part near the described optical axis of described dioptric element group of described aspheric surface is a surface for projection slightly, and the part of the described optical axis away from described dioptric element group of described aspheric surface is one around this surperficial toroidal bend convex surface of projection slightly.
20. projection arrangements as claimed in claim 19, it is characterized in that: the side-play amount ratio of the each point that in described aspheric surface, R value is 0.3 is less than 0.1, the side-play amount ratio of the each point that in described aspheric surface, R value is 0.5 is less than 0.2, the side-play amount ratio of the each point that in described aspheric surface, R value is 0.7 is less than 0.5, in wherein said aspheric surface, the R value of any is the ratio of the distance of described point and described optical axis and the ultimate range of described aspheric surface and described optical axis, the side-play amount ratio of described point is the side-play amount of the described point on optical axis direction in described aspheric surface and the ratio of described aspheric surface maximum offset on optical axis direction.
21. projection arrangements as claimed in claim 12, is characterized in that: described aspheric surface meets aspheric surface formula
Wherein Z is the side-play amount on optical axis direction in described aspheric surface, and c is the inverse of the radius of osculating sphere, and K is quadric surface coefficient, and y is the side-play amount in the direction of vertical described aspheric optical axis, and A
1, A
2, A
3, A
4, A
5for asphericity coefficient ,-0.025<c<-0.005 and-500<K<-40, asphericity coefficient A
1, A
2, A
3, A
4, A
5in at least one of them is contrary with the sign of c, the corresponding Z value in position of the y=0 of described aspheric surface is not maximal value, described aspheric surface comprises that a slope is 0 position, described slope is that 0 position refers to the position that Z is 0 with respect to the first order derivative of y, and the position that described slope is 0 is to drop on y=0.3 γ to y=0.7 γ place, wherein γ be described aspheric surface with respect to described optical axis the ultimate range in y direction.
22. projection arrangements as claimed in claim 12, is characterized in that: described dioptric element group comprises at least one catoptron, and the described aspheric surface reflecting surface that is described catoptron.
23. projection arrangements as claimed in claim 12, it is characterized in that: described penetration screen comprises: a Fresnel Lenses surface and lens pillar surface, wherein said Fresnel Lenses surface configuration is on the bang path of described image strip, and described lens pillar surface configuration is on the bang path of the described image strip from described Fresnel Lenses surface, wherein said lens pillar surface has a plurality of column microlens structures, described in each, a plurality of column microlens structures extend along a first direction, and described a plurality of column microlens structure is arranged along a second direction.
24. projection arrangements as claimed in claim 12, it is characterized in that: also comprise an inner full-reflection prism, be disposed on the light path between described dioptric element group and described light valve, be disposed on the bang path of described image strip, and between described light valve and described projection lens.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420010730.5U CN203786454U (en) | 2014-01-08 | 2014-01-08 | Illumination system and projection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420010730.5U CN203786454U (en) | 2014-01-08 | 2014-01-08 | Illumination system and projection device |
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| CN203786454U true CN203786454U (en) | 2014-08-20 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107861253A (en) * | 2017-12-08 | 2018-03-30 | 青岛海信激光显示股份有限公司 | Laser projection device |
| CN109884842A (en) * | 2017-12-06 | 2019-06-14 | 扬明光学股份有限公司 | Projector |
| CN109884843A (en) * | 2017-12-06 | 2019-06-14 | 扬明光学股份有限公司 | Projector |
| CN110389487A (en) * | 2018-04-17 | 2019-10-29 | 深圳光峰科技股份有限公司 | Light supply apparatus and display equipment |
| WO2020151629A1 (en) * | 2019-01-25 | 2020-07-30 | 深圳光峰科技股份有限公司 | Light source control method for display device, and display device |
| CN114545637A (en) * | 2022-04-21 | 2022-05-27 | 业成科技（成都）有限公司 | Projection display device and vehicle with same |
-
2014
- 2014-01-08 CN CN201420010730.5U patent/CN203786454U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109884842A (en) * | 2017-12-06 | 2019-06-14 | 扬明光学股份有限公司 | Projector |
| CN109884843A (en) * | 2017-12-06 | 2019-06-14 | 扬明光学股份有限公司 | Projector |
| CN107861253A (en) * | 2017-12-08 | 2018-03-30 | 青岛海信激光显示股份有限公司 | Laser projection device |
| CN110389487A (en) * | 2018-04-17 | 2019-10-29 | 深圳光峰科技股份有限公司 | Light supply apparatus and display equipment |
| WO2020151629A1 (en) * | 2019-01-25 | 2020-07-30 | 深圳光峰科技股份有限公司 | Light source control method for display device, and display device |
| CN111487840A (en) * | 2019-01-25 | 2020-08-04 | 深圳光峰科技股份有限公司 | Light source control method of display device and display device |
| CN114545637A (en) * | 2022-04-21 | 2022-05-27 | 业成科技（成都）有限公司 | Projection display device and vehicle with same |
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