CN1523396A - Wide screen liquid crystal projection display lighting system - Google Patents
Wide screen liquid crystal projection display lighting system Download PDFInfo
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- CN1523396A CN1523396A CNA031509673A CN03150967A CN1523396A CN 1523396 A CN1523396 A CN 1523396A CN A031509673 A CNA031509673 A CN A031509673A CN 03150967 A CN03150967 A CN 03150967A CN 1523396 A CN1523396 A CN 1523396A
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- eye lens
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 30
- 238000006243 chemical reaction Methods 0.000 claims abstract description 9
- 230000010287 polarization Effects 0.000 claims abstract description 9
- 150000001875 compounds Chemical class 0.000 claims description 23
- 238000005286 illumination Methods 0.000 claims description 19
- 239000013078 crystal Substances 0.000 claims description 17
- 238000000034 method Methods 0.000 abstract description 2
- 230000003287 optical effect Effects 0.000 description 3
- 241000700608 Sagitta Species 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
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Abstract
本发明公开了一种宽银幕液晶投影显示照明系统。提出了在照明系统中引入柱面透镜、双圆锥透镜和其它类型的非球面透镜来提高能量利用率的方法。该系统依次具有光源、复眼透镜组、偏振转换系统、柱面透镜组(或非球面透镜组)、透镜和液晶板。本发明的优点是：1)运用长宽比在4∶3～16∶9之间的复眼透镜组都可得到16∶9的宽银幕投影显示；2)运用长宽比在4∶3～16∶9之间的复眼透镜组可以提高系统的能量利用率，减少能量损失；3)使用柱面透镜、双圆锥透镜和其他类型的非球面透镜的系统仍保持光分布均匀性。
The invention discloses a wide-screen liquid crystal projection display lighting system. A method of introducing cylindrical lens, biconical lens and other types of aspheric lens into the lighting system to improve energy utilization is proposed. The system sequentially has a light source, a fly-eye lens group, a polarization conversion system, a cylindrical lens group (or an aspheric lens group), a lens and a liquid crystal panel. The advantages of the present invention are: 1) wide-screen projection display of 16:9 can be obtained by using the fly-eye lens group with aspect ratio between 4:3～16:9; 2) using aspect ratio between 4:3～16 : The fly-eye lens group between 9 can improve the energy utilization rate of the system and reduce energy loss; 3) The system using cylindrical lenses, biconical lenses and other types of aspheric lenses still maintains the uniformity of light distribution.
Description
Technical field
The present invention relates to a kind of wide-screen crystal projection display illumination system.
Background technology
Liquid crystal projection apparatus is widely used in aspects such as electronic teaching, office, commercial affairs and advertisement recreational, and has progressively come into family.Adapt to the market demand miscellaneous in order to satisfy, the specification of projector and style are also ever-changing.With common projection picture is that 4: 3 projector is compared, and 16: 9 wide-screen projector has more wide visual field on Width, stronger visual effect can be provided, thereby progressively is subjected to the favor in market.The fly's-eye lens structure is a kind of the most common optical projection system lighting system.The scheme of this patent proposes just on this basis.
According to the principle of work of fly's-eye lens, the shape of each sub-lens must be identical with liquid crystal board among the compound eye array I, and for wide-screen liquid crystal projection apparatus, the length breadth ratio of each sub-lens also should be 16: 9.The design of traditional wide-screen projector is exactly that to adopt two sub-lens length breadth ratios be 16: 9 fly's-eye lens, fly's-eye lens I will be divided into many beamlets from the light beam that light source sends and focus on the fly's-eye lens II, fly's-eye lens II is imaged on the sub-compound eye among the corresponding fly's-eye lens I on the liquid crystal board simultaneously, different beamlets overlapped on liquid crystal board, thus uniform illumination is provided.Focus spot on the fly's-eye lens II is the picture of filament of light source, is ellipse, and its size depends primarily on the parameter of light source.In addition, in order to improve the luminous energy of system, the sub-compound eye among the fly's-eye lens I has all carried out off-centre usually, and the sub-compound eye optical centre among the fly's-eye lens II remains unchanged, and has increased off-axis aberration like this.Comprehensive above 2 points, the size of filament picture can be much larger than the sub-compound eye among the fly's-eye lens II usually, and the light that drops on outside the corresponding sub-compound eye can't be utilized by system, and this has just caused the loss of luminous energy.In addition, also have to rely on circuit control that screen is partitioned into 16: 9 in 4: 3 optical projection system, this method also can cause bigger energy loss.
Summary of the invention
The objective of the invention is to propose a kind of wide-screen crystal projection display illumination system.
A kind of wide-screen crystal projection display illumination system has light source, compound eye lens group, polarization conversion system, set of cylindrical lenses, lens and liquid crystal board successively, wherein, compound eye lens group is made up of fly's-eye lens I and fly's-eye lens II, and set of cylindrical lenses is made up of two cylindrical lenses.
Another kind of wide-screen crystal projection display illumination system has light source, compound eye lens group, polarization conversion system, non-spherical lens group, lens and liquid crystal board successively, wherein, compound eye lens group is made up of fly's-eye lens I and fly's-eye lens II, and the non-spherical lens group is made up of two non-spherical lenses.
Advantage of the present invention is:
1) compound eye lens group of utilization length breadth ratio between 4: 3～16: 9 all can obtain 16: 9 wide-screen Projection Display;
2) compound eye lens group of utilization length breadth ratio between 4: 3～16: 9 can improve the capacity usage ratio of system, reduces energy loss;
3) use the system of cylindrical lens, double cone lens and non-spherical lens still to keep the light distributing homogeneity.
Description of drawings
Fig. 1 is traditional wide-screen crystal projection display illumination system structural representation;
Fig. 2 is the hot spot distribution plan on the liquid crystal board in traditional wide-screen crystal projection display illumination system;
Fig. 3 is that the fly's-eye lens II of traditional wide-screen crystal projection display illumination system goes up the hot spot distribution plan;
Fig. 4 is to use the wide-screen crystal projection display illumination system structural representation of set of cylindrical lenses;
Fig. 5 is to use the hot spot distribution plan on the liquid crystal board of wide-screen crystal projection display illumination system of set of cylindrical lenses;
Fig. 6 is to use the wide-screen crystal projection display illumination system structural representation of non-spherical lens.
Embodiment
A kind of wide-screen crystal projection display illumination system has light source 1, compound eye lens group 3, polarization conversion system 4, set of cylindrical lenses 6, lens 8 and liquid crystal board 9 successively, wherein, compound eye lens group 3 is made up of fly's-eye lens I3a and fly's-eye lens II3b, and set of cylindrical lenses 6 is made up of cylindrical lens 6a, 6b.
Another kind of wide-screen crystal projection display illumination system has light source 1, compound eye lens group 3, polarization conversion system 4, non-spherical lens group 7, lens 8 and liquid crystal board 9 successively, wherein, compound eye lens group 3 is made up of fly's-eye lens I3a and fly's-eye lens II3b, and non-spherical lens group 7 is made up of non-spherical lens 7a, 7b.
The length breadth ratio scope of the sub-compound eye of fly's-eye lens that the present invention adopts is between 4: 3～16: 9, and the length breadth ratio of liquid crystal board is 16: 9.Principle of work according to the compound eye illumination, fly's-eye lens I neutron compound eye (4: 3～16: 9) to be imaged onto on the liquid crystal board (16: 9), the enlargement ratio that need this moment on length and width both direction is different, can carry out the amplification of different proportion to two orthogonal directions respectively by introducing two cylindrical lenses.Because set of cylindrical lenses object the meridian picture and the sagitta of arc picture that are become do not overlap, thus must use at least two components from cylindrical lens, fly's-eye lens I all can be imaged on the liquid crystal board on length and Width through behind the cylindrical lens.
The introducing of cylindrical lens makes the sub-compound eye length breadth ratio of fly's-eye lens can choose arbitrary proportion, can determine best sub-compound eye length breadth ratio according to the characteristics such as arc length of filament, principle is exactly that sub-compound eye in the fly's-eye lens is through after the off-centre, hot spot as much as possible concentrates on its corresponding sub-compound eye, reduces energy loss.
As shown in Figure 1, this system is made up of light source 1, compound eye lens group 2, polarization conversion system 4, lens 5, lens 8 and liquid crystal board 9, and wherein, compound eye lens group 2 is by fly's-eye lens I2a and fly's-eye lens II2b.The lamp bowl is chosen the parabolic bowl, and the light that light source sends is through being the class directional light after the reflector.The sub-compound eye length breadth ratio of fly's-eye lens I2a, II2b is 16: 9.Its principle of work is: the light that fly's-eye lens I will send from the lamp source is divided into many beamlets and focuses on compound eye array II.Converging light by fly's-eye lens II becomes linearly polarized light through polarization conversion system.Pass through lens 5 and lens 8 again, the sub-lens among the fly's-eye lens I all is imaged on the liquid crystal board, different beamlets overlapped on liquid crystal board, thus evenly thrown light on.In addition by fly's-eye lens II imaging, the circular light spot of light source is converted to the needed rectangular light spot of liquid crystal board, reduced energy loss.
As shown in Figure 2, can find out obviously among the figure that the energy band of two broads is arranged on the liquid crystal board Width, this part energy distribution can't be utilized outside liquid crystal board.These two energy bands are because the hot spot on the fly's-eye lens II causes greater than sub-compound eye.As seen from the figure, the loss of energy can show much larger than length direction on Width, and for each sub-compound eye, the luminous energy summation that drops on neighbouring sub-compound eye is greater than the luminous energy summation that drops on the adjacent sub-compound eye in the left and right sides.
As shown in Figure 3, the graticule line among the figure is the sub-compound eye of fly's-eye lens II.Can see that middle two row compound eye hot spots almost join together, and more energy distribution are arranged in neighbouring sub-compound eye.Hot spot of these two row is the main cause of two energy bands shown in causing on Fig. 2 Width.Next door two row hot spots can cause on Fig. 2 length direction two energy bands that form outside the liquid crystal board shape, because at this moment the energy outside the sub-compound eye is not high, so can not obviously find out in the drawings.In order to reduce the energy loss on the liquid crystal board Width, the utility model proposes and use the fly's-eye lens of length breadth ratio between 4: 3～16: 9, the sub-compound eye of fly's-eye lens II is broadened on Width, reduce the luminous energy that drops on other sub-compound eyes.
As shown in Figure 4, the label of all elements is corresponding with Fig. 1 among the figure, just the lens among Fig. 15 is split as two mutually perpendicular cylindrical lens 6a of bus and cylindrical lens 6b, is 16: 9 by cylindrical lens with 4: 3 spot shaping.For sub-compound eye is the fly's-eye lens I of any length breadth ratio, changes the focal length of two cylindrical lenses, can make it be imaged as the size of liquid crystal board.
Fig. 5 distributes for the hot spot of introducing on the cylindrical mirror liquid crystal board afterwards.Can find out obviously that compare with Fig. 4, the light that drops on outside the liquid crystal board has significantly reduced, total light energy output also improves greatly.
As seen from Figure 4, the clear aperture of cylindrical lens 6b is bigger, because light through first cylindrical lens 6a, has only the light on the length direction to assemble, the light of Width remains unchanged.In order to reduce the clear aperture of cylindrical lens 6b, cylindrical lens 6a can be improved to the non-spherical lens 7a of double cone lens or other type.Fig. 6 is the structure drawing of device after improving.Double cone lens after the improvement or non-spherical lens all have focal power at meridian and sagitta of arc both direction, can also limit the Width glazed thread, thereby reduce the bore of cylindrical lens 6b.
Claims (4)
1. wide-screen crystal projection display illumination system, it is characterized in that, it has light source (1), compound eye lens group (3), polarization conversion system (4), set of cylindrical lenses (6), lens (8) and liquid crystal board (9) successively, wherein, compound eye lens group (3) is made up of fly's-eye lens I (3a) and fly's-eye lens II (3b), and set of cylindrical lenses (6) is made up of cylindrical lens (6a), (6b).
2. a kind of wide-screen crystal projection display illumination system according to claim 1, the length breadth ratio scope that it is characterized in that said fly's-eye lens neutron compound eye is 4: 3～16: 9.
3. wide-screen crystal projection display illumination system, it is characterized in that, it has light source (1), compound eye lens group (3), polarization conversion system (4), non-spherical lens group (7), lens (8) and liquid crystal board (9) successively, wherein, compound eye lens group (3) is made up of fly's-eye lens I (3a) and fly's-eye lens II (3b), and non-spherical lens group (7) is made up of non-spherical lens (7a), (7b)
4. a kind of wide-screen crystal projection display illumination system according to claim 3, the length breadth ratio scope that it is characterized in that said fly's-eye lens neutron compound eye is 4: 3～16: 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031509673A CN1523396A (en) | 2003-09-10 | 2003-09-10 | Wide screen liquid crystal projection display lighting system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031509673A CN1523396A (en) | 2003-09-10 | 2003-09-10 | Wide screen liquid crystal projection display lighting system |
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| CN1523396A true CN1523396A (en) | 2004-08-25 |
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| CNA031509673A Pending CN1523396A (en) | 2003-09-10 | 2003-09-10 | Wide screen liquid crystal projection display lighting system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100538507C (en) * | 2006-07-18 | 2009-09-09 | 中华映管股份有限公司 | illumination system and projection system |
| CN107045255A (en) * | 2017-02-03 | 2017-08-15 | 中国电子科技集团公司第五十五研究所 | A kind of slim LC projection display LED polarization light sources |
| CN107589551A (en) * | 2017-07-24 | 2018-01-16 | 西安电子科技大学 | A kind of multiple aperture polarization imaging device and system |
-
2003
- 2003-09-10 CN CNA031509673A patent/CN1523396A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100538507C (en) * | 2006-07-18 | 2009-09-09 | 中华映管股份有限公司 | illumination system and projection system |
| CN107045255A (en) * | 2017-02-03 | 2017-08-15 | 中国电子科技集团公司第五十五研究所 | A kind of slim LC projection display LED polarization light sources |
| CN107589551A (en) * | 2017-07-24 | 2018-01-16 | 西安电子科技大学 | A kind of multiple aperture polarization imaging device and system |
| CN107589551B (en) * | 2017-07-24 | 2019-07-16 | 西安电子科技大学 | A multi-aperture polarization imaging device and system |
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