CN202281894U - Liquid-crystal projector and light source of same - Google Patents
Liquid-crystal projector and light source of same Download PDFInfo
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- CN202281894U CN202281894U CN2011203125551U CN201120312555U CN202281894U CN 202281894 U CN202281894 U CN 202281894U CN 2011203125551 U CN2011203125551 U CN 2011203125551U CN 201120312555 U CN201120312555 U CN 201120312555U CN 202281894 U CN202281894 U CN 202281894U
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Abstract
The utility model relates to a light source of a liquid-crystal projector. The light source of the liquid-crystal projector comprises a luminous source and a high-molecular polarized light conversion film arranged on the light source, wherein light emitted by the luminous source is emergent through the high-molecular polarized light conversion film; the luminous source is a plane light source or a plane-like light source, certain polarized light emitted by the luminous source is polarized light capable of being polarized through a polaroid, and the other part of the light emitted by the luminous source is polarized light incapable of being polarized through the polaroid; and the polarized light capable of being polarized through the polaroid is directly emergent through the polarized light conversion film, and the other part, namely the polarized light incapable of being polarized through the polaroid, is converted into the polarized light capable of being polarized through the polaroid by 90-degree phase rotation by the processing of the high-molecular polarized light conversion film, and then is emergent through the high-molecular polarized light conversion film. By utilization of the light source disclosed by the utility model, the light emitted by the luminous source can be applied to the projector completely, and the brightness of the projector can be doubled under the condition of not increasing the power of the luminous source. The utility model further comprises the liquid-crystal projector using the light source.
Description
Technical field
The utility model relates to a kind of projector light source and the liquid crystal projection apparatus that uses this light source.
Background technology
Liquid crystal projection apparatus is to utilize liquid crystal light valve technology, through light is modulated, realizes image projection; Can know that from the liquid crystal imaging principle the used liquid crystal light valve of liquid crystal projection apparatus has two kinds: through mode liquid crystal light valve LCD and reflective liquid crystal light valve LCOS.As shown in fig. 1; Through mode liquid crystal light valve LCD 100, the light beam that is sent by backlight 1 is through polaroid 8a down; Enter into through mode liquid crystal light valve LCD 100; Liquid crystal through light valve is inner is controlled, and finally appears through last polaroid 8b, just can be delivered in the projection lens at last and throw away.Shown in Fig. 2; In the projector that uses reflective liquid crystal light valve LCOS; The light beam that backlight 1 sends enters into reflective liquid crystal light valve LCOS 200, a series of mirror reflects of process in reflective liquid crystal light valve LCOS 200; And, arrive in the projection lens 7 through behind the polarizing transmission of a series of polaroids 8.Can find out that by above-mentioned two figure the liquid crystal projection apparatus that has used liquid crystal light valve all need become the polarized light of a certain polarised direction to ordinary light source through polarized light, could realize video picture.
As shown in Figure 3, at present, the mode that obtains polarized light generally is to utilize polaroid (PBS) 8; The polarized light absorption of certain direction of the light that sends light source 1; And letting the polarized light of other direction pass through, people generally are divided into natural light the both direction polarized light combination of P direction and S direction, utilize polarized light piece 8; Be free to determine the choice of P light or S light, to adapt to the needs of liquid crystal projection apparatus.From the above, the polarized light of certain polarization of the required usefulness of liquid crystal projection apparatus is obtained through polaroid.This is explanation just, and the maximum optical percent of pass of polaroid is 50%, so the light that liquid crystal projection apparatus institute can use only accounts for half that light source sends light, and the service efficiency of light is very low, not only influences the raising of projector's brightness, also causes great energy dissipation.At present, the method that improves the brightness of liquid crystal projection apparatus has two kinds of approach, and 1, be through improving light source power, 2, improve the light source service efficiency.Wherein, the method that improves source efficiency mainly is that optical polarization photoconverter (PCS) is set, promptly through complicated optical component is set in light path; With the polarized light indexing, improve its utilization factor, thereby the raising light efficiency; But because its component structure is complicated unusually; Receive restrictions such as price and technological means, general liquid crystal projection apparatus will improve brightness, normally adopts more high-power light source to realize; But the bigger power loss that then causes of light source power is then big more, and the energy dissipation that causes is bigger.In addition, the light source thermal value increases, and special cooling system need be set to keep the operate as normal of projector.
The utility model content
To the low problem of liquid crystal projection apparatus light source utilization factor in the prior art, the utility model provides a kind of liquid crystal projection apparatus light source and the liquid crystal projection apparatus that uses this light source (utility model can not guard method, so deletion herein).The utility model improves the liquid crystal projection apparatus light-source brightness through a slice macromolecule polarized light conversion film is set between projector light source and liquid crystal light valve.This macromolecule polarized light conversion film has sandwich construction; Except that the polarized light of the polarization that can pass through a direction, also can be with the polarized light half-twist of other part polarization, becoming all can be through the polarized light of polaroid; The light that is sent by light emitting source all can be absorbed through polaroid; Thereby improve light efficiency greatly, under the condition that does not increase light source power, can light-source brightness be increased 40--50% in theory; Thereby improve projector brightness greatly, the invention also discloses liquid crystal projection apparatus light source that utilizes above-mentioned principle and the liquid crystal projection apparatus that uses this light source.
A kind of liquid crystal projection apparatus light source, this liquid crystal projection apparatus light source comprise light emitting source and are arranged on the macromolecule polarized light conversion film on the light source that the light that said light emitting source sends all penetrates through macromolecule polarized light conversion film; Said light emitting source is a planar light source, and the polarized light of a certain polarization of the light that it sends is for passing through the polarized light of the polarization of polaroid, and another part is the polarized light that can't pass through the polarization of polaroid; The polarized light that can pass through the polarization of polaroid directly penetrates through said polarized light conversion film; And another part can't pass through the polarized light of the polarization of polaroid; After handling through macromolecule polarized light conversion film with the phase place half-twist; Become the polarized light that can pass through the polarization of polaroid, penetrate through macromolecule polarized light conversion film again.
Further, said macromolecule polarized light conversion film has selective transmission, reflection and polarized light spinfunction, and promptly light comprises two kinds of polarized lights in the natural light that is sent by light source when a side of macromolecule polarized light conversion film is injected; Wherein a kind of polarize light can penetrate through said macromolecule polarized light conversion film; And the polarized light of another polarization enters into said macromolecule polarized light conversion film; Got back in the macromolecule polarized light conversion film by outgoing one lateral reflection; And 90 ° polarization upset takes place in the process of incident and reflection and become the polarized light of polarization that can be through macromolecule polarized light conversion film, penetrate from macromolecule polarized light conversion film outgoing one side.
Further; Said macromolecule polarized light conversion film is through polarized light conversion film stationary installation; Be fixed on the light emitting source; The effect of said polarized light conversion film stationary installation is that macromolecule polarized light conversion film is played effect fixing and that support, it is launched in said light emitting source front portion, and the light that light emitting source is sent penetrates through macromolecule polarized light conversion film fully.
Further, the distance between said macromolecule polarized light conversion film and the light emitting source should be minimum under the condition that guarantees the light emitting source heat radiation.
Further, said liquid crystal projection apparatus light source also can be provided with a slice or some plano-convex lens/Fresnel Lenses; Said plano-convex lens/Fresnel Lenses is arranged on the front of macromolecule polarized light conversion film, and the optical axis of plano-convex lens/Fresnel Lenses belongs to the plane perpendicular to light emitting source, and through its central point; Through plano-convex lens/Fresnel Lenses is set in light source the light beam that is sent by light emitting source can excessively not dispersed, but through after plano-convex lens/Fresnel Lenses polymerization, the uniform beam that pools smaller angle penetrate.
Further; Said liquid crystal projection apparatus light source also is provided with a light tunnel and plano-convex lens/Fresnel Lenses, and said smooth tunnel is that an end opening is big, hollow tubaeform or round platform or terrace with edge shape that an end opening is little; Its osculum is the entry portal of light, and big mouthful is the exit wound of bullet of light; Also be provided with the reflection horizon on its inwall, be used for reflection of light; Said light emitting source is arranged on the entry portal place of light tunnel, and said macromolecule polarized light conversion film and plano-convex lens/Fresnel Lenses are set in turn in the light tunnel; Light emitting source sends has the light beam than wide-angle; At first pool the light beam of smaller angle through plano-convex lens/Fresnel Lenses; And then further converge and homogenizing through the reflection horizon of light tunnel inwall, form the light that evenly converges at endpiece at last and penetrate.
A kind of liquid crystal projection apparatus, the employed light source of this liquid crystal projection apparatus is the light source that has macromolecule polarized light conversion film.
The utility model through between liquid crystal projection apparatus light source and liquid crystal light valve, set up a kind of can be with the macromolecule polarized light conversion film of polarized light half-twist; The normal optical of being sent by light emitting source is handled through film polarized light conversion film all become the unidirectional polarize light that can pass through polaroid; Through the following polaroid of liquid crystal display, realize the maximum using of light source again, thereby improve luminous efficiency of source; And then increase projector screen brightness under the prerequisite that does not change light source power; Can brightness be improved 50% in theory, but in practical application, have some losses because of reasons such as reflections, its increase degree is more than 40%.
Description of drawings
Fig. 1 is through mode LCD liquid crystal light valve principle figure;
Fig. 2 is a reflective LCOS liquid crystal light valve projector schematic diagram;
Fig. 3 is for producing the method schematic diagram of polarized light;
Fig. 4 is a light-source structure synoptic diagram among the embodiment 1;
Fig. 5 improves liquid crystal projection apparatus light-source brightness schematic diagram for the utility model;
Fig. 6 is embodiment 2 light-source structure synoptic diagram;
Fig. 7 is embodiment 3 light-source structure synoptic diagram.
Embodiment
Below in conjunction with accompanying drawing the utility model embodiment is elaborated; And setting light emitting source 11 sends among the accompanying drawing 4-7 light beam, to penetrate direction be the place ahead, and all describe as the light source in the right the utility model of example in the following example with the liquid crystal projection apparatus that uses through mode liquid crystal light valve LCD.And all as example the light source in the utility model is described in the following example with the liquid crystal projection apparatus that uses through mode liquid crystal light valve LCD.
As shown in Figure 4, liquid crystal projection apparatus light source 1 comprises in the present embodiment: light emitting source 11, heating radiator 12 and Polarization converter 13.Light emitting source 11 is a planar light source, can be led light source or other planar light sources, and heating radiator 12 is used to assist 11 heat radiations of flat luminous source, to guarantee its operate as normal.On the flat luminous source 11 reflection horizon 18 is set also, the light that is sent by light emitting source 11 is all penetrated through Polarization converter 13.Polarization converter 13 is arranged on light emitting source 11 fronts, comprises macromolecule polarized light conversion film 14, polarized light conversion film stationary installation 15, height adjusting washer (disk) 16 and set bolt 17 etc.Polarized light conversion film stationary installation 15 is made up of two clamping plate; Through using clamping plate that macromolecule polarized light conversion film 14 edges are fixed to clamp; It is launched in light emitting source 11 fronts, make the light that sends by flat luminous source 11, all penetrate through macromolecule polarized light conversion film 14.Polarized light conversion film stationary installation 15 also can be other versions; Its effect is played effect fixing and that support to macromolecule polarized light conversion film; It is launched in light emitting source 11 front portions, and the light that light source is sent penetrates through this macromolecule polarized light conversion film 14 fully.Height adjusting washer (disk) 16 is used for fixedly macromolecule polarized light conversion film 14 and polarized light conversion film stationary installation 15 are fixedly supported on light emitting source 11 heating radiators 12 with fixed screw 17.It is a plurality of that height adjusting washer (disk) 16 and fixed screw 17 can be provided with along the edge of macromolecule polarized light conversion film 14, to guarantee the steady support of macromolecule polarized light conversion film 14 and polarized light conversion film stationary installation 15 and fixing.Distance between macromolecule polarized light conversion film 14 and the light emitting source 11, more little in theory good more, its distance can be adjusted through the length of adjustment height adjusting washer (disk) 16.But consider light source meeting heat release in luminescence process, heat can cause certain influence to macromolecule polarized light conversion film 14 work, so distance between the two can not be too near.
Macromolecule polarized light conversion film 14 has the conversion film that the macromolecule membrane of polarized light phase position adjusting function is formed by multilayer, with the light source that is applied in the liquid crystal projection apparatus that uses through mode liquid crystal light valve LCD 100 its principle of work is described.As shown in Figure 5, the light that is sent by light emitting source 11 is full light sources, promptly comprises the polarized light of the polarization of P light and S light both direction, suppose that P light can pass through the following polaroid 8a in the liquid crystal projection apparatus, and S light will be absorbed by polaroid 8a.Macromolecule polarized light conversion film 14 is a kind of films with selective transmission, reflection function; Be light from incident one side of macromolecule polarized light conversion film 14 (Fig. 4 for towards light emitting source 11 sides) when shining macromolecule polarized light conversion film 14; The polarized light P of the polarization of sending by light emitting source 11; Can all can pass through this macromolecule polarized light conversion film 14 through the polarized light of the polarization of polaroid 8a down, penetrate by its outgoing one side.And the polarized light S of another polarization; Promptly can't pass through the polarized light of the polarization of polaroid, can be got back in the macromolecule polarized light conversion film 14 by outgoing one lateral reflection, and in incident and reflection process; 90 ° polarization deflection has taken place and has become the polarized light P of polarization in the polarized light S of polarization; Blaze abroad from macromolecule polarized light conversion film 14 outgoing one side at last, through the effect of macromolecule polarized light conversion film 14, making the light that is sent by light emitting source 11 can be that projector is used through polaroid all.
Through using the above-mentioned light source that has macromolecule polarized light conversion film; Can be with before being mapped to polaroid in illumination; Will be carried out 90 ° polarization upset earlier by the polarity light that polaroid stops and become can be all the polarized light of polarization through polaroid; That is to say, macromolecule polarized light conversion film is set on light source can makes the light that sends by light source all be used for liquid crystal projection apparatus.In theory; Than the light source that does not use this macromolecule polarized light conversion film; Its brightness can double, and when promptly not using macromolecule polarized light conversion film, the light that light source sends only has 50% to throw away through polaroid; But used macromolecule polarized light conversion film can the light that sent by light source all be used for projector, theoretical utilization factor reaches 100%.Owing to certain light loss that causes of reflection, practical efficiency is 70-80% in actual the use.
Embodiment 2
Liquid crystal projection apparatus light source 1 is to have set up plano-convex lens/Fresnel Lenses 21 on the basis of liquid crystal projection apparatus light source in embodiment 1 in the present embodiment.As shown in Figure 6, light emitting source 11, macromolecule polarized light conversion film 14 and plano-convex lens/Fresnel Lenses 21 set gradually.The optical axis of plano-convex lens/Fresnel Lenses 21 is perpendicular to plane, light emitting source 11 place, and preferably through its central point.The light beam that is sent by light emitting source 1 through macromolecule polarized light conversion film 14 after, penetrate through after the adjustment of plano-convex lens/Fresnel Lenses 21 again.Through plano-convex lens/Fresnel Lenses 21 is set in light source the light beam that is sent by light emitting source 11 can excessively not dispersed, but through after plano-convex lens/Fresnel Lenses focusing, the uniform beam that pools smaller angle shine down on the polaroid 8a.
Embodiment 3
As shown in Figure 6, liquid crystal projection apparatus light source 1 is to have set up light tunnel 20 on the basis of liquid crystal projection apparatus light source in embodiment 2 in the present embodiment.Light tunnel 20 is that an end opening is big, hollow round platform or terrace with edge shape that the tubaeform or round platform that an end opening is little or the sidewall of terrace with edge constitute.Its small end is the entry portal of light, and its big end is the exit wound of bullet of light; Also be provided with the reflection that reflection horizon 22 is used for light beam on its inwall.Light emitting source 11 is arranged on the entry portal place of light tunnel 20, and Polarization converter 13 and plano-convex lens/Fresnel Lenses 21 are positioned at light tunnel 20.The effect of light tunnel 20 is to the light beam after converging through plano-convex lens/Fresnel Lenses 21; Be delivered to down on the polaroid 8a through light tunnel 20; Whole light of light beam all are enclosed in the light tunnel; Assurance all is used for liquid crystal projection apparatus by the light that light emitting source 11 sends, and does not have because light beam exhales and can't be used by liquid crystal projection apparatus owing to the distance relation between light emitting source and the polaroid makes a part of light.The light beam of propagating through light tunnel 20 further converges and homogenizing through the reflection horizon 22 of light tunnel inwall; Exit wound of bullet at light tunnel 20 forms the light ejaculation of more evenly converging at last; To realize higher light intensity more uniformly, the brightness of projector is further promoted.
Planar light source among above-mentioned each embodiment also can be the planar light source that pointolite forms through the conversion back.
Claims (8)
1. a liquid crystal projection apparatus light source is characterized in that, this liquid crystal projection apparatus light source comprises light emitting source and be arranged on the macromolecule polarized light conversion film on the light source that the light that said light emitting source sends all penetrates through macromolecule polarized light conversion film; Said light emitting source is a planar light source, and the polarized light of a certain polarization of the light that it sends is for passing through the polarized light of the polarization of polaroid, and another part is the polarized light that can't pass through the polarization of polaroid; The polarized light that can pass through the polarization of polaroid directly penetrates through said polarized light conversion film; And another part can't pass through the polarized light of the polarization of polaroid; After handling through macromolecule polarized light conversion film with the phase place half-twist; Become the polarized light that can pass through the polarization of polaroid, penetrate through macromolecule polarized light conversion film again.
2. according to the said a kind of liquid crystal projection apparatus light source of claim 1; It is characterized in that; Said macromolecule polarized light conversion film has selective transmission, reflection and polarized light spinfunction; Be light when a side of macromolecule polarized light conversion film is injected, comprise two kinds of polarized lights in the natural light that sends by light source; Wherein a kind of polarize light can penetrate through said macromolecule polarized light conversion film; And the polarized light of another polarization enters into said macromolecule polarized light conversion film; Got back in the macromolecule polarized light conversion film by outgoing one lateral reflection; And 90 ° polarization upset takes place in the process of incident and reflection and become the polarized light of polarization that can be through macromolecule polarized light conversion film, penetrate from macromolecule polarized light conversion film outgoing one side.
3. according to the said a kind of liquid crystal projection apparatus light source of claim 1, it is characterized in that said macromolecule polarized light conversion film is fixed on the light emitting source through polarized light conversion film stationary installation.
4. according to the said a kind of liquid crystal projection apparatus light source of claim 3, it is characterized in that said polarized light conversion film stationary installation comprises two clamping plates, the said light conversion film stationary installation of shaking is fixedly installed on the said light emitting source.
5. according to the said a kind of liquid crystal projection apparatus light source of claim 1, it is characterized in that the distance between said macromolecule polarized light conversion film and the light emitting source is more little good more.
6. according to the said a kind of liquid crystal projection apparatus light source of claim 1, it is characterized in that said liquid crystal projection apparatus light source also comprises plano-convex lens/Fresnel Lenses; Said plano-convex lens/Fresnel Lenses is arranged on the front of macromolecule polarized light conversion film, and the optical axis of plano-convex lens/Fresnel Lenses belongs to the plane perpendicular to light emitting source, and through its central point.
7. according to the said a kind of liquid crystal projection apparatus light source of claim 1, it is characterized in that the liquid crystal projection apparatus light source also comprises light tunnel and plano-convex lens/Fresnel Lenses; Hollow tubaeform or round platform or terrace with edge shape that one end opening is little, its osculum is the entry portal of light, big mouthful is the exit wound of bullet of light; Also be provided with the reflection horizon on its inwall, be used for reflection of light; Said light emitting source is arranged on the entry portal place of light tunnel, and said macromolecule polarized light conversion film and plano-convex lens/Fresnel Lenses are set in turn in the light tunnel; Light emitting source sends has the light beam than wide-angle; At first pool the light beam of smaller angle through plano-convex lens/Fresnel Lenses; And then further converge and homogenizing through the reflection horizon of light tunnel inwall, form the light that evenly converges at endpiece at last and penetrate.
8. a liquid crystal projection apparatus is characterized in that, the employed light source of said liquid crystal projection apparatus is arbitrary liquid crystal projection apparatus light source among the claim 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203125551U CN202281894U (en) | 2011-08-25 | 2011-08-25 | Liquid-crystal projector and light source of same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203125551U CN202281894U (en) | 2011-08-25 | 2011-08-25 | Liquid-crystal projector and light source of same |
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| CN202281894U true CN202281894U (en) | 2012-06-20 |
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| CN2011203125551U Expired - Fee Related CN202281894U (en) | 2011-08-25 | 2011-08-25 | Liquid-crystal projector and light source of same |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102314066A (en) * | 2011-08-25 | 2012-01-11 | 北京亚视创业科技发展有限公司 | Method for raising liquid crystal projector brightness, light source and liquid crystal projector |
| CN103543529A (en) * | 2012-07-16 | 2014-01-29 | 信泰光学(深圳)有限公司 | Projector |
| CN109188834A (en) * | 2018-09-03 | 2019-01-11 | 深圳小淼科技有限公司 | A kind of projector |
| CN109407452A (en) * | 2018-11-16 | 2019-03-01 | 深圳市高格投影科技有限公司 | A kind of LCD projection optical system and projector improving light source utilization rate |
| CN110824819A (en) * | 2018-08-07 | 2020-02-21 | 三星电子株式会社 | Structured light projector and electronic device including the same |
| CN114384750A (en) * | 2022-01-26 | 2022-04-22 | 深圳市科金明电子股份有限公司 | Projection device |
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2011
- 2011-08-25 CN CN2011203125551U patent/CN202281894U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102314066A (en) * | 2011-08-25 | 2012-01-11 | 北京亚视创业科技发展有限公司 | Method for raising liquid crystal projector brightness, light source and liquid crystal projector |
| CN103543529A (en) * | 2012-07-16 | 2014-01-29 | 信泰光学(深圳)有限公司 | Projector |
| CN103543529B (en) * | 2012-07-16 | 2016-05-18 | 信泰光学(深圳)有限公司 | Projector |
| CN110824819A (en) * | 2018-08-07 | 2020-02-21 | 三星电子株式会社 | Structured light projector and electronic device including the same |
| US11543740B2 (en) | 2018-08-07 | 2023-01-03 | Samsung Electronics Co., Ltd. | Structured light projector and electronic apparatus including the same |
| US11815795B2 (en) | 2018-08-07 | 2023-11-14 | Samsung Electronics Co., Ltd. | Structured light projector and electronic apparatus including the same |
| CN109188834A (en) * | 2018-09-03 | 2019-01-11 | 深圳小淼科技有限公司 | A kind of projector |
| CN109407452A (en) * | 2018-11-16 | 2019-03-01 | 深圳市高格投影科技有限公司 | A kind of LCD projection optical system and projector improving light source utilization rate |
| CN114384750A (en) * | 2022-01-26 | 2022-04-22 | 深圳市科金明电子股份有限公司 | Projection device |
| CN114384750B (en) * | 2022-01-26 | 2024-03-26 | 深圳市科金明电子股份有限公司 | Projection device |
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| GR01 | Patent grant | ||
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Granted publication date: 20120620 Termination date: 20120825 |