CN1200559C - Projection display equipment for displaying electronic image - Google Patents
Projection display equipment for displaying electronic image Download PDFInfo
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- CN1200559C CN1200559C CN 00126856 CN00126856A CN1200559C CN 1200559 C CN1200559 C CN 1200559C CN 00126856 CN00126856 CN 00126856 CN 00126856 A CN00126856 A CN 00126856A CN 1200559 C CN1200559 C CN 1200559C
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Abstract
The present invention relates to a projection display device for displaying an electronic image, which comprises light source which is used for generating red, green and blue polarize light of different polarities, three modulation units and a light splitting mirror set, wherein each modulation unit is used for modulating monochromatic polarize light in the method of reflection and changing the polarity of the monochromatic polarize light so as to display an electronic image. The light splitting mirror set comprises a first light splitting mirror, a third polarity splitting mirror, a first and a second polarity splitting mirrors and a first polarity inversion mirror which is arranged between the second and the third polarity splitting mirrors, wherein the first light splitting mirror and the third polarity splitting mirror are arrayed along one diagonal line, and the first and the second polarity splitting mirrors are arrayed along the other diagonal line. The red, green and the blue polarize light of the light source is divided into three monochromatic light of red, green and blue by the first light splitting mirror, the first and the second polarity splitting mirrors and the first polarity inversion mirror, and the three monochromatic light of red, green and blue is respectively led into the three modulation units to change the polarities of the three monochromatic light. Three modulated light is generated in the method of reflection and is input the third polarity splitting mirror. Then the three modulated light is combined into an output beam to display the electronic image.
Description
Technical field
The invention provides a kind of projection display equipment, a kind of projection display equipment of able to display electronic image especially is provided.
Background technology
With reference to Fig. 1.Fig. 1 is projection display equipment 10 structural representations of known liquid crystal projector.Projection display equipment 10 includes the light source 12 of a broken white, is used for producing light; One uniform irradiation electro-optical device 14, it is located at light source 12 the place aheads, is used for converting the light that light source 12 sends to illumination evenly and the light beam of squarish; One colour esensitized equipment 16 is used for the light that light source 12 is produced is divided into the input light of red (R), green (G), blue (B) three kinds of different colours; Three prisms 18 of one squarish, it comprises three input faces and an output face, is used for input light with RGB three beams different colours and synthesizes a branch of output light and export; Three optic modulating devices 20 are made of the single color LCD plate, are located at three input face the place aheads of three prisms 18 respectively, are used for modulating the light of three beams input, contain the output light of electron image with generation; Three focusing lens 17,19,21, be separately positioned on three optic modulating devices 20 before, in order to RGB three beams that colour esensitized equipment 16 is produced input light-ray condensing on three optic modulating devices 20; And a projection lens 22, be arranged on the place ahead of the output face of colour splitting prism 18, in order to output ray cast that three prisms 18 are produced to a screen 24.Wherein, optic modulating device 20 is made of transparent monochromatic liquid crystal display, in order to show the electron image of a monochrome.18 three monochromatic images that three monochromatic liquid crystal displays 20 are produced of three prisms synthesize a chromatic image, and by its output face output.
Colour esensitized equipment 16 comprises one first dichronic mirror 26, in order to isolate a kind of coloured light earlier in the square white light beam that uniform irradiation electro-optical device 14 is produced, mode that for example can transmission is told red input light earlier, one speculum 27, be used for the redness input light that dichronic mirror 26 is produced is reflexed to focusing lens 17, one second dichronic mirror 28, be used for separating remaining two kinds of coloured light, for example blueness is imported light by tell and reach focusing lens 19 in the reflection ray of dichronic mirror 26 with reflection way, green input light is then seen through by this second dichronic mirror 28, and imports focusing lens into via two lens 30 and two speculums 32.Structure by colour esensitized equipment 16 finds out that clearly the light path length that red, blue, green three looks input light is passed by is different in colour esensitized equipment 16.Redness and blueness input light are respectively through a dichronic mirror and a speculum, and both light paths about equally, and are then a lot of than optical length red and blueness input light but green is imported the light path of light.Because the different illumination that will influence light of distance.Therefore in order to remedy the illumination loss that green input light produces because of light path is long, two lens 30 are separately positioned on the front end of two speculums 32, are used for focused ray to produce the illumination deficiency problem different with the uniformity because of the distance of transmitting is long to solve green input light.Then the setting of two lens 30 make green input light the light path of process become more complicated, and make the cost raising of projection display equipment 10.These problems all are because red, blue, green three looks that colour esensitized equipment 16 is produced are imported light, short different in size the causing of the light of being passed by in colour esensitized equipment 16.
Summary of the invention
Therefore, main purpose of the present invention is to provide a kind of projection display equipment, and it can utilize an Amici prism to solve above-mentioned light path problem different in size, and can simplify the optical design of known projection display equipment 10.
The invention provides a kind of projection display equipment of able to display electronic image, it comprises a light source, in order to the different redgreenblue polarized light of polarization, it provides the three look polarized lights that are made of a monochromatic polarized light and a double-colored polarized light, and the polarised direction of the polarization of one in this double-colored polarized light coloured light must be different with other two polarization coloured light; Three modulating units, each modulating unit are used for modulating a monochromatic polarized light with reflection way, and change its polarity to show an electron image; One Amici prism group, it comprises one first dichronic mirror and one the 3rd polariscope of arranging along a diagonal, first and second polariscope of arranging along another diagonal, and be arranged on one first polar switching mirror (retarder film) between the second and the 3rd polariscope.Wherein, first dichronic mirror, first and second polariscope and the first polar switching mirror are to be divided into RGB three monochromatic light in order to the redgreenblue polarized light with light source, and it is imported three modulating units respectively, to change RGB three monochromatic polarity, and produce three light modulated with reflection way and import the 3rd polariscope, three light modulated are synthesized an output beam, with display electronic image.
Description of drawings
Fig. 1 is the structural representation of the projection display equipment of known liquid crystal projector;
Fig. 2 is the structural representation of the projection display equipment of liquid crystal projector of the present invention;
Fig. 3 is the structural representation of Amici prism group;
Fig. 4 is the structural representation of modulating unit;
Fig. 5 is the structural representation of the light supply apparatus of projection display equipment of the present invention;
Fig. 6 and Fig. 7 are respectively the structural representation of another embodiment of light supply apparatus of the present invention and projection display equipment.
Symbol description in the accompanying drawing:
40,110 projection display equipments, 42 light supply apparatuses
50 Amici prism groups, 52 projection lens
54 screens 60A～E prism
70 first polar switching mirrors
76 reflection type image modulating devices
78 quarter-wave deferred mounts, 80 light sources
The makeup of 82 auroral poles is put
44,46,48 modulating units
62,86,88,102,112 dichronic mirrors
64,66,68 polariscopes
84,100 light-dividing devices
90,92,104,106 speculums
94,1/108th 2 wavelength deferred mount
Embodiment
Arrive Fig. 4 with reference to Fig. 2.Fig. 2 is the structural representation of the projection display equipment 40 of liquid crystal projector of the present invention.Fig. 3 is the structural representation of Amici prism group 50.Fig. 4 is the structural representation of modulating unit.Projection display equipment 40 includes 42, three modulating units of a light supply apparatus 44,46 and 48, one Amici prism groups (dichroic-polarization beam splitter prism) 50, and a projection lens 52.Light supply apparatus 42 is used to produce the redgreenblue polarized light that illumination is even and polarity is different, that is to say, has the polarised direction of polarized light of the same colour different with the polarised direction of other two look polarized lights in the three look polarized lights of generation.The polarized light that light supply apparatus 42 for example of the present invention is produced is red (R), green (G*), blue (B) three look polarized lights, and the polarised direction of its medium green (G*) look polarized light is different with the polarised direction of red (G), blue (B) two look polarized lights.Modulating unit 44,46 and 48 is to be used for modulating a monochromatic polarized light and changing its polarization with reflection way.50 of Amici prism groups are to be used for accepting red (R), green (G*), blue (B) three look polarized lights, and it is imported respectively in three modulating units 44,46 and 48 to modulate, and three monochromatic polarized lights are synthesized a branch of output light output after changing its polarity again.Projection lens 52 is located at the place ahead of the output face of Amici prism group 50, is used for output ray cast to a screen 54 that Amici prism group 50 is produced.
Amici prism group 50 is to constitute, and plate one deck plated film as minute surface respectively on the contact-making surface of five prism 60A, 60B, 60C, 60D, 60E with five leg-of- mutton prism 60A, 60B, 60C, 60D, 60E.Amici prism group 50 comprises one first dichronic mirror, 62, one first polariscopes, 66, one second polariscopes 68, the 3rd polariscope 64, and one first polar switching mirror (retarder film) 70.First dichronic mirror 62, the 3rd polariscope 64 are arranged along the diagonal of Amici prism group 50 and are provided with, and first and second polariscope 66,68 is then arranged along another diagonal of Amici prism group 50 and is provided with.70 in the first polar switching mirror is arranged between the second and the 3rd polariscope 68,64.
Each modulating unit 44,46 and 48 all as shown in Figure 4, each unit comprises a reflection type image modulating device 76, be used for modulating an incident light to produce a reverberation with reflection way, an and quarter-wave deferred mount 78, be used for incident light and reverberation are respectively postponed quarter-wave, so that reverberation that modulating unit produced and incident light differ 1/2nd wavelength, thereby cause its polarity opposite.Wherein, reflection type image modulating device 76 can be made of a digital micro mirror device or a reflective liquid-crystal display.
As shown in Figure 2, illumination is even and polarity is different red (R), green (G*) that is produced when light supply apparatus 42, blue (B) three look polarized lights, after entering Amici prism group 50, first dichronic mirror 62 will be told indigo plant (B) look polarized light with reflection way, and reach first polariscope 66, red (G), green (G*) double-colored polarized light then transmission pass through first dichronic mirror 62, and reach second polariscope 68.At this, the plated film design of first polariscope 66, make reflection incident S type polarized light and penetrate P type polarized light, so first polariscope 66 minutes imports first modulating unit 48 with indigo plant (B) look polarized light with reflection way, and via after first modulating unit, the 48 change polarity, be reflected into indigo plant (B*) look light modulated and penetrated first polariscope 66, and the 3rd polariscope 64 that leads.The plated film design of second polariscope 68, also make reflection incident S type polarized light and penetrate P type polarized light, so after belonging to red (R) light of S type polarized light and reflexing to second modulating unit 44, again through modulation, to reflect and change its polarised direction be P type polarized light, penetrated second polariscope 68.Green (G*) light that belongs to P type polarized light originally then penetrated second polariscope, 68 to the 3rd modulating units 46 earlier, again through modulation, to reflect and change its polarised direction be S type polarized light and by the reflection of second polariscope 68.Then, from the redness (R* of second and third modulating unit 44,46 to penetrate back; The P type) and green (G; The S type) light modulated will be via the first polar switching mirror, 70 guiding the 3rd polariscope 64.The first polar switching mirror 70 is with red light modulated (R*; The P type) polarity transformation becomes another polarity (R; But do not change green light modulated (G the S type); The S type) polarity.The design of the 3rd polariscope 64 also make reflection incident S type polarized light and penetrate P type polarized light, so indigo plant (B*) the look light modulated from first polariscope 66 will be penetrated, then will be reflected from red (R) look of second polariscope 68, green (G*) look light modulated, and a synthetic jointly output beam enters in the projection lens 52.Like this, projection display equipment 40 of the present invention just simply utilizes Amici prism group 50, after red (R), green (G*), blue (B) three look polarized lights are injected first dichronic mirror 62, arrangement conversion through beam split, split pole, at last again by the 3rd polariscope 64 with indigo plant (B*), the photosynthetic output beam that becomes of green (G) and red (R) three color scheme system, see through projection lens 52 and be projected on the screen 54.
Because Amici prism group 50 is to utilize dichronic mirror 62 and polariscope 64,66,68 combination, with red in the white light, green, blue three beams different colours light is separated, and import respectively in the corresponding optic modulating device and modulate, therefore in the requirement of incident ray, light supply apparatus 42 must provide the three look polarized lights that are made of a monochromatic polarized light and a double-colored polarized light, and the polarised direction of the polarization of one in this double-colored polarized light coloured light, must be different with other two polarization coloured light, after just can making its beam split split pole, can be output into an output beam jointly according to design to projection lens 52 through Amici prism group 50.
With reference to Fig. 5, Fig. 5 is the structural representation of the light supply apparatus 42 of projection display equipment 40 of the present invention.Light supply apparatus 42 includes a fluorescent tube 80, be used for producing the white light of being formed by RGB (RGB) three looks non-polarized light, the makeup of one auroral poles puts 82, before being arranged on light source 80, be used for converting the white light WW* (RR*GG*BB*) that fluorescent tube 80 sends to RGB (RGB) three look polarized lights, and a light-dividing device 84, be used for the three look polarized lights (RGB) that polarity is identical to convert three look polarized lights (RG*B) of opposed polarity to.Light-dividing device 84 includes two dichronic mirrors 86,88, be used for red, green, blue three coloured light are separated or merge, two speculums 90,92, be used for reflection ray, and one 1/2nd wavelength deferred mount 94, be used for changing the polarity of monochromatic polarized light or double-colored polarized light, with the different redgreenblue polarized light of polarization.After three identical look polarized lights (RGB) of polarity enter light-dividing device 84, dichronic mirror 86 is told green glow (B) in the mode of transmission, and via speculum 72 reflections, pass the polarized light that 1/2nd wavelength deferred mounts 94 become green (G*) look, utilize dichronic mirror 88 reflection output light-dividing devices 84 again, red (R), blue (B) light are then successively by after dichronic mirror 86, speculum 90 reflections, penetrate dichronic mirror 88 output light-dividing devices 84, so just can obtain three different look polarized lights (RG*B) of polarity.Like this, the three look polarized lights (RG*B) that the polarity of light supply apparatus 42 generations is different are incident in the Amici prism group 50 by first dichronic mirror 62 of Fig. 2.
With reference to Fig. 6 and Fig. 7, it is the light-dividing device 100 of another embodiment of the present invention and the structural representation of projection display equipment 110.Light-dividing device 100 is with the difference of light-dividing device 84: light-dividing device 100 only comprises a dichronic mirror 102, two 104,106 and one 1/2nd wavelength deferred mounts 108 of speculum, get final product polarization different red (R), green (G*), blue (B) three look polarized lights, the outbound course of the polarized light of its line (G*) look polarized light and red (R), blue (B) two looks forms a vertical angle, is injected in first dichronic mirror 112 of Amici prism group 50 by two orthogonal input faces of Fig. 7 Amici prism group 50 then.The film coating composition of first dichronic mirror 112 of projection display equipment 110, different with the film coating composition of first dichronic mirror 62 of projection display equipment 40, first dichronic mirror 112 will reflect green (G*) light and indigo plant (B) light and allow red (R) transmittance pass; In addition, other element of projection display equipment 110 are then identical with projection display equipment 40.
In addition, the polarity transformation of the red beam after the above-mentioned first polar switching mirror 70 will be modulated becomes another polarity, but does not influence the polarity of green beam.Yet, also can adopt polarity transformation to become another polarity with green beam, but do not influence the first polar switching mirror 70 of red beam polarity, only need be provided with this polar switching mirror this moment between the first and the 3rd polariscope 66,64, to change the polarity of blue light beam, can make homogeneous beam (blueness) different with the polarity of double color laser (red and green), so, homogeneous beam (blueness) after the 3rd polariscope 64 can will be modulated in the mode that reflects and penetrate respectively synthesizes an output beam with double color laser (red and green), and is projected on the screen 54.
Can it is evident that from the structure of projection display equipment 40,110, the optical path length that red, green, blue three looks input light is passed through in projection display equipment 40,110 is approximately equal, and light path weak point very, therefore projection display equipment 40,110 does not need to use any unnecessary lens and the assembly of speculum, help separate each input light, or remedy the illumination change that produces because of the difference on the light path length.Compare with the projection display equipment 10 of known liquid crystal projector shown in Figure 1, the structure of projection display equipment of the present invention is very simple, and cost is lower, and effect is also relatively good.
The above only is the preferred embodiments of the present invention, and every equivalent variations that claim is made according to the present invention and modification all belong in the scope of the present invention.
Claims (12)
1. projection display equipment, it comprises:
One light source, in order to the different redgreenblue polarized light of polarization, it provides the three look polarized lights that are made of a monochromatic polarized light and a double-colored polarized light, and the polarised direction of the polarization of one in this double-colored polarized light coloured light, must be different with other two polarization coloured light;
First, second and third modulating unit, each modulating unit are to be used for modulating a monochromatic polarized light with reflection way, and change its polarity;
One Amici prism group, it comprises one first dichronic mirror, one first polariscope, one second polariscope, and one the 3rd polariscope, described first dichronic mirror and the 3rd polariscope are arranged along a diagonal, and described first and second polariscope is arranged along another diagonal;
One first polar switching mirror is located between the described second and the 3rd polariscope;
Wherein, described first dichronic mirror is divided into one first monochromatic light and a bi-coloured light in order to three look polarized lights with light source, and it is reached described first and second polariscope respectively, first polariscope is with first monochromatic light described first modulating unit that leads, and with first light modulated of this first modulating unit reflection the 3rd polariscope that leads, second polariscope is divided into two monochromatic light with bi-coloured light according to its polarity, and second and third modulating unit that leads respectively, and then with second and third light modulated of second and third modulating unit reflection, via the first polar switching mirror the 3rd polariscope that leads, the first polar switching mirror is with the polarity of the modulated beam of light in second and third modulated beam of light, be transformed into another polarity, and the 3rd polariscope is with first, second and third light modulated synthesizes an output beam.
2. projection display equipment as claimed in claim 1 wherein also comprises a projection lens, is used for the output beam of described the 3rd polariscope is projected to a screen.
3. projection display equipment as claimed in claim 1, wherein said Amici prism group is made of the Amici prism of a squarish, described first dichronic mirror and the 3rd polariscope are arranged along the diagonal of Amici prism group, and described first and second polariscope is arranged along another diagonal of Amici prism group.
4. projection display equipment as claimed in claim 1, three look polarized lights of wherein said light source are made of a monochromatic polarized light and a double-colored polarized light, so monochrome and double-colored polarized light are injected first dichronic mirror by the opposite sides of first dichronic mirror.
5. projection display equipment as claimed in claim 1, three look polarized lights of wherein said light source are single light beams, its one side by described first dichronic mirror is injected first dichronic mirror.
6. projection display equipment as claimed in claim 1, wherein said first polariscope conducts first monochromatic light to first modulating unit with reflection way, and first light modulated of first modulating unit reflection then sees through first polariscope and reaches the 3rd polariscope.
7. projection display equipment as claimed in claim 1, wherein said first polariscope conducts first monochromatic light to first modulating unit in the mode of transmission, and first light modulated of the first modulating unit transmission then sees through first polariscope and reaches the 3rd polariscope.
8. projection display equipment as claimed in claim 1, wherein said second polariscope with second monochromatic light in the bi-coloured light with reflection way second modulating unit that leads, and with the 3rd monochromatic light in the bi-coloured light with the mode of transmission the 3rd modulating unit that leads, second light modulated of second modulating unit reflection then sees through second polariscope and reaches the 3rd polariscope, the 3rd light modulated of the 3rd modulating unit reflection then by second polariscope with reflection way the 3rd polariscope that leads.
9. projection display equipment as claimed in claim 1, wherein each modulating unit comprises a reflection type image modulating device, modulate an incident light to produce a reverberation with reflection way, and quarter-wave deferred mount, in order to described incident light and reverberation are respectively postponed quarter-wave, so that the reverberation that modulating unit produced is opposite with the polarity of incident light.
10. projection display equipment as claimed in claim 9, wherein said reflection type image modulating device are digital type micro mirror device.
11. projection display equipment as claimed in claim 9, wherein said reflection type image modulating device is a reflective liquid-crystal display.
12. projection display equipment as claimed in claim 1, wherein said light source comprises a fluorescent tube, in order to produce non-polar redgreenblue light, the makeup of one auroral poles is put, in order to convert non-polar three coloured light to three look polarized lights, a spectroscope group, in order to three look polarized lights are divided into a monochromatic polarized light and a double-colored polarized light, and a wavelength deferred mount, in order to changing the polarity of this monochrome polarized light or double-colored polarized light, thus the different redgreenblue polarized light of polarization.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00126856 CN1200559C (en) | 2000-09-07 | 2000-09-07 | Projection display equipment for displaying electronic image |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00126856 CN1200559C (en) | 2000-09-07 | 2000-09-07 | Projection display equipment for displaying electronic image |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1342022A CN1342022A (en) | 2002-03-27 |
| CN1200559C true CN1200559C (en) | 2005-05-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00126856 Expired - Fee Related CN1200559C (en) | 2000-09-07 | 2000-09-07 | Projection display equipment for displaying electronic image |
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| Country | Link |
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| CN (1) | CN1200559C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100381866C (en) * | 2002-08-05 | 2008-04-16 | 株式会社日立制作所 | Projection type image display apparatus |
| KR100694068B1 (en) * | 2004-11-27 | 2007-03-12 | 삼성전자주식회사 | Illuminating unit and projection type image display apparatus employing the same |
| EP2100180A1 (en) * | 2006-12-18 | 2009-09-16 | Thomson Licensing | Wide color gamut projector |
| US9360609B2 (en) | 2006-12-18 | 2016-06-07 | Thomson Licensing | 2D/3D projector with rotating translucent cylinder for alternating light polarisation |
| EP2160647A1 (en) | 2007-06-25 | 2010-03-10 | Thomson Licensing | Video recording prevention system |
| GB0719721D0 (en) * | 2007-10-09 | 2007-11-21 | Seos Ltd | Image display apparatus |
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2000
- 2000-09-07 CN CN 00126856 patent/CN1200559C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1342022A (en) | 2002-03-27 |
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Granted publication date: 20050504 Termination date: 20100907 |