WO2021015101A1 - Dispositif d'affichage - Google Patents

Dispositif d'affichage Download PDF

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Publication number
WO2021015101A1
WO2021015101A1 PCT/JP2020/027733 JP2020027733W WO2021015101A1 WO 2021015101 A1 WO2021015101 A1 WO 2021015101A1 JP 2020027733 W JP2020027733 W JP 2020027733W WO 2021015101 A1 WO2021015101 A1 WO 2021015101A1
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WO
WIPO (PCT)
Prior art keywords
synthetic prism
substrate
prism
display device
beam splitter
Prior art date
Application number
PCT/JP2020/027733
Other languages
English (en)
Japanese (ja)
Inventor
翔吾 久保田
Original Assignee
ソニー株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ソニー株式会社 filed Critical ソニー株式会社
Priority to JP2021533991A priority Critical patent/JPWO2021015101A1/ja
Publication of WO2021015101A1 publication Critical patent/WO2021015101A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/16—Cooling; Preventing overheating
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor

Definitions

  • FIG. 1 shows an example of a configuration of the projector 1 as a display device according to the first embodiment of the present disclosure, in which red (R) colored light, green (G) colored light, and blue (B) are displayed in an all-white display state. It is shown together with the optical path of each colored light.
  • the panel core 30 is joined to a red panel 31R, a green panel 31G, a blue panel 31B, a polarization beam splitter (ch-PBS) 32, a polarization beam splitter (ch-PBS) 33, and a synthetic prism 34.
  • a substrate 35 and a bonding substrate 36 are provided.
  • the red panel 31R, the green panel 31G, and the blue panel 31B are each composed of, for example, a reflective liquid crystal panel (LCOS).
  • the phosphor wheel 14 is provided with a phosphor that is excited by blue light to emit yellow light including red light and green light.
  • the yellow light including the red light and the green light generated by the phosphor wheel 14 is condensed toward the dichroic mirror 15 by the condenser lens 17, and then reflected by the dichroic mirror 15 and incident on the illumination system 20.
  • the illumination system 20 generates uniform illumination light based on the light from the light source unit 10 and emits it toward the panel core 30.
  • the blue light emitted from the light source unit 10 and the yellow light including the red light and the green light are divided by the first fly-eye lens array 21 and the second fly-eye lens array 22 of the illumination system 20, and then the PS conversion element.
  • the polarization state is aligned in one direction (S polarization in the example of FIG. 1).
  • the S-polarized blue light and yellow light are incident on the dichroic mirror 25 via the condenser lens 24.
  • the lighting system 20 is not limited to the configuration of the fly-eye lighting system shown in FIG. 1, and may be a critical lighting system, a Koehler lighting system, a rod integrator lighting system, or the like. Further, the light source unit 10 and the illumination system 20 may include a diffuser plate and a beam shaping element for shaping the luminous flux into a desired angular distribution.
  • the panel core 30 may further include a compensation plate (retarder) (not shown).
  • the retarder for example, between ch-PBS32 and the red panel 31R, ch-PBS32 and blue to compensate for the phase difference due to the skew rays of ch-PBS32 and ch-PBS33 and the pre-tilt of the panel liquid crystal. It is arranged between the panel 31B and between the ch-PBS 33 and the green panel 31G.
  • the retarder a known retardation plate can be used.
  • the composite prism 34 has blue light. It may be a dichroic PBS that transmits both P-polarized light and S-polarized light, and transmits P-polarized light and reflects S-polarized light for red light and green light. Higher contrast can be obtained with dichroic PBS.
  • Comparative Example 1 In Comparative Example 1, the ch-PBS 32 and the two PBSs corresponding to the synthetic prism 34 are bonded to each other without providing the crystal substrate corresponding to the bonding substrate 35.
  • the glass material of PBS corresponding to ch-PBS32 and synthetic prism 34 was PBH56, and the thermal conductivity was 0.635 W / (m ⁇ K).
  • FIG. 6 shows an example of the configuration of the projector 1A as the display device according to the second embodiment together with the optical paths of the red light, the green light, and the blue light in the all-white display state.
  • the incident side substrate 37, ch-PBS 32, and the bonding substrate 35 are arranged on the optical path (RB-ch) of red light and blue light.
  • the transmittance of the blue band of the bonding portion is higher than that in the case of using an acrylic adhesive or the like. It gets higher. Therefore, the amount of heat generated at the joint is reduced, the generation of the thermal lens is suppressed, and the focus drift is further suppressed.
  • the blue light transmittance of the joint portion is high (the absorption of blue light is small), the progress of photodegradation of the joint portion is slowed down, and the light resistance of the panel core 30A can be improved.
  • the emitting side substrate 39 corresponds to a specific example of the "third substrate" in the technique of the present disclosure.
  • the synthetic prism 34 has a light emitting surface.
  • the emitting side substrate 39 is made of a material having a higher thermal conductivity than that of the synthetic prism 34, and is bonded to the light emitting surface of the synthetic prism 34.
  • the emitting side substrate 39 has optical characteristics as a depolarizing element that eliminates polarized light by giving different phase differences to light in the red band and green band depending on the wavelength. Such optical properties are usually obtained with a dielectric having birefringence, such as a single quartz substrate. Sapphire or the like is preferably used as a material other than quartz.
  • the projector 1D according to the fifth embodiment is suitable when the projection lens 41 is an ultrashort focus lens because polarization is eliminated by removing blue light by the emission side substrate 39 as a polarization elimination element. ..
  • Ultra-short focus lenses have a large incident angle with respect to the projection surface, and the range that can be taken by the incident angle tends to be large depending on the angle of view, so the difference in reflectance between P-polarized light and S-polarized light becomes large, and polarization is eliminated. If not, uneven brightness and uneven color are likely to occur.
  • the projector 1D according to the fifth embodiment can be suitably used for a projection surface having a low degree of depolarization.
  • the projector 1E according to the sixth embodiment includes a lighting system 20E instead of the lighting system 20 in the projector 1 according to the first embodiment. Further, the projector 1E according to the sixth embodiment includes a panel core 30E instead of the panel core 30 in the projector 1 according to the first embodiment.
  • the illumination system 20E includes a first fly-eye lens array 21, a second fly-eye lens array 22, a PS conversion element 23, a condenser lens 24, dichroic mirrors 61A and 61B, a reflection mirror 62, and a reflection mirror 63. ,
  • the dichroic mirror 64 is provided.
  • the configuration of the first fly-eye lens array 21 to the condenser lens 24 in the illumination system 20E is the same as that of the illumination system 20 in the first embodiment.
  • the panel core 30E includes a red panel 31R, a green panel 31G, a blue panel 31B, a red polarizing beam splitter (Rch-PBS) 32R, a green polarizing beam splitter (Gch-PBS) 32G, and blue. It is equipped with a polarizing beam splitter (Bch-PBS) 32B. Further, the panel core 30E includes a synthetic prism 34E, a red bonding substrate 35R, a green bonding substrate 35G, and a blue bonding substrate 35B.
  • Rch-PBS32R, Gch-PBS32G, and Gch-PBS32B each correspond to a specific example of a "polarizing beam splitter" in the technique of the present disclosure.
  • the synthetic prism 34E corresponds to a specific example of the "first synthetic prism” in the technique of the present disclosure.
  • the red bonding substrate 35R, the green bonding substrate 35G, and the blue bonding substrate 35B each correspond to a specific example of the "first substrate” in the technique of the present disclosure.
  • the Rch-PBS32R and the red bonding substrate 35R are arranged on the optical path (R-ch) of red light.
  • the red bonding substrate 35R is made of a material having a higher thermal conductivity than the synthetic prism 34E and Rch-PBS32R, and bonds the synthetic prism 34E and Rch-PBS32R.
  • the red bonding substrate 35R, the green bonding substrate 35G, and the blue bonding substrate 35B are arranged so as not to have an optical axis or to affect the polarization direction of the image light of each color.
  • a type of dichroic prism called a cross prism is used for the composite prism 34E.
  • the synthetic prism 34E synthesizes three colors of video light.
  • PBH56 is used for example, S-BSL7 or other optical glass is used for the synthetic prism 34E.
  • the red bonding substrate 35R and the blue bonding substrate 35B are provided with optical characteristics as a half-wave plate (phase difference plate with a phase difference of 90 °) so that the polarization directions of red light and blue light are rotated by 90 °. It may be arranged in any orientation. In this case, the reflection characteristics of red light and blue light in the synthetic prism 34E can be improved.
  • the synthetic prism 34E and the ch-PBS of each color are bonded via the bonding substrate of each color made of a material having high thermal conductivity. Changes in the internal temperature distributions of the synthetic prism 34E and ch-PBS of each color are suppressed, and it is possible to improve the deterioration of the image display state due to the temperature changes of the optical members.
  • FIG. 11 shows a configuration example of a main part of the projector 1F as a display device according to the seventh embodiment.
  • FIG. 11A shows a state in which the main part of the projector 1F is viewed from the upper surface direction.
  • FIG. 11B shows a state in which the main part of the projector 1F is viewed from the side surface.
  • the projector 1F according to the seventh embodiment includes a panel core 30F instead of the panel core 30E in the projector 1E according to the sixth embodiment.
  • the panel core 30F includes a first panel core 30F1, a second panel core 30F2, and a synthetic prism 70. Further, the panel core 30F includes a bonding substrate 71, a bonding substrate 72, and an emission side substrate 73.
  • the first panel core 30F1 corresponds to a specific example of the "first optical unit” in the technology of the present disclosure.
  • the second panel core 30F2 corresponds to a specific example of the "second optical unit” in the technique of the present disclosure.
  • the synthetic prism 70 corresponds to a specific example of the "second synthetic prism” in the technique of the present disclosure.
  • the bonded substrate 71 corresponds to a specific example of the "fourth substrate” in the technique of the present disclosure.
  • the bonded substrate 72 corresponds to a specific example of the "fifth substrate” in the technique of the present disclosure.
  • the emitting side substrate 73 corresponds to a specific example of the "sixth substrate” in the technique of the present disclosure.
  • the first panel core 30F1 includes a first red panel 31R1, a first green panel 31G1, a first blue panel 31B1, a first red polarization beam splitter (Rch-PBS) 32R1, and a first green polarization.
  • a beam splitter (Gch-PBS) 32G1 and a first blue polarized beam splitter (Bch-PBS) 32B1 are provided.
  • the first panel core 30F1 includes a first color composite prism 34F1, a first red bonding substrate 35R1, a first green bonding substrate 35G1, and a first blue bonding substrate 35B1.
  • the Rch-PBS32R1 and the first red bonding substrate 35R1 are arranged on the optical path (R-ch) of red light.
  • the first red bonding substrate 35R1 is made of a material having a higher thermal conductivity than the first color synthetic prism 34F1 and Rch-PBS32R1, and bonds the first color synthetic prism 34F1 and Rch-PBS32R1.
  • the Gch-PBS32G1 and the first green bonding substrate 35G1 are arranged on the optical path (G-ch) of green light.
  • the first green bonding substrate 35G1 is composed of a material having a higher thermal conductivity than the first color synthetic prism 34F1 and Gch-PBS32G1, and bonds the first color synthetic prism 34F1 and Gch-PBS32G1.
  • the first red bonding substrate 35R1, the first green bonding substrate 35G1, and the first blue bonding substrate 35B1 each have no optical axis or affect the polarization direction of the image light of each color. It is arranged so that it does not hold.
  • a type of dichroic prism called a cross prism is used for the first color composite prism 34F1.
  • the first color synthesis prism 34F1 synthesizes three colors of video light.
  • PBH56 is used.
  • S-BSL7 or other optical glass is used for the first color synthetic prism 34F1.
  • the Rch-PBS32R2 and the second red bonding substrate 35R2 are arranged on the optical path (R-ch) of red light.
  • the second red bonding substrate 35R2 is made of a material having a higher thermal conductivity than the second color synthetic prism 34F2 and Rch-PBS32R2, and bonds the second color synthetic prism 34F2 and Rch-PBS32R2.
  • the Gch-PBS32G2 and the second green bonding substrate 35G2 are arranged on the optical path (G-ch) of green light.
  • the second green bonding substrate 35G2 is composed of a material having a higher thermal conductivity than the second color synthetic prism 34F2 and Gch-PBS32G2, and bonds the second color synthetic prism 34F2 and Gch-PBS32G2.
  • the bonding substrate 71 is made of a material having a higher thermal conductivity than the first color synthetic prism 34F1 of the first panel core 30F1 and the synthetic prism 70, and joins the first color synthetic prism 34F1 of the first panel core 30F1 and the synthetic prism 70. To do.
  • the bonding substrate 71 is arranged so as not to have an optical axis or to affect the polarization direction of the image light of each color.
  • the emitting side substrate 73 optical characteristics as a quarter wave plate acting on each of the red, blue, and green wavelength bands, the images from the first panel core 30F1 and the second panel core 30F2, respectively.
  • Light may be converted into circularly polarized light in different directions of rotation.
  • the color synthesis prisms and the synthesis prisms 70 of the first panel core 30F1 and the second panel core 30F2 are formed of a bonded substrate made of a material having high thermal conductivity. Since the bonding is performed via 71 and 72, changes in the internal temperature distributions of the color synthesis prism and the synthesis prism 70 are suppressed, and the temperature gradient between the color synthesis prism and the synthesis prism 70 is reduced. As a result, focus drift is suppressed.
  • the emitting side substrate 73 made of a material having a higher thermal conductivity than that of the synthetic prism 70 is joined to the emitting surface of the synthetic prism 70. Heat is transferred from the central portion having a high temperature to the peripheral portion inside the exit side substrate 73, and the temperature gradient of the synthetic prism 70 is further reduced. As a result, focus drift is further suppressed.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Optics & Photonics (AREA)
  • Projection Apparatus (AREA)

Abstract

L'invention concerne un dispositif d'affichage comprenant : une pluralité de modulateurs spatiaux de lumière ; un premier prisme de synthèse qui synthétise une pluralité de faisceaux lumineux vidéo modulés par la pluralité de modulateurs spatiaux de lumière ; au moins un diviseur de faisceau à polarisation qui guide la pluralité de faisceaux lumineux vidéo modulés par la pluralité de modulateurs spatiaux de lumière vers le premier prisme de synthèse ; et au moins un premier substrat qui comprend un matériau ayant une conductivité thermique supérieure à celle du premier prisme de synthèse et du diviseur de faisceau à polarisation, et qui joint le premier prisme de synthèse et le diviseur de faisceau de polarisation.
PCT/JP2020/027733 2019-07-24 2020-07-16 Dispositif d'affichage WO2021015101A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2021533991A JPWO2021015101A1 (fr) 2019-07-24 2020-07-16

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019-136142 2019-07-24
JP2019136142 2019-07-24

Publications (1)

Publication Number Publication Date
WO2021015101A1 true WO2021015101A1 (fr) 2021-01-28

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002208139A (ja) * 2001-01-11 2002-07-26 Ricoh Co Ltd 情報記録方法、情報記録装置及び情報処理装置
JP2004020621A (ja) * 2002-06-12 2004-01-22 Hitachi Ltd 反射型映像投射装置と、それを用いた投写型映像ディスプレイ装置、及び、それに用いる光源装置
JP2005043656A (ja) * 2003-07-22 2005-02-17 Victor Co Of Japan Ltd 投射型立体画像表示装置
JP2005157293A (ja) * 2003-10-31 2005-06-16 Victor Co Of Japan Ltd 画像表示装置
US20050157265A1 (en) * 2000-03-31 2005-07-21 Sharp Laboratories Of America, Inc. Projection display systems for light valves
JP2015232073A (ja) * 2014-06-10 2015-12-24 株式会社フジクラ 難燃性樹脂組成物、及び、これを用いた成形体
WO2018020850A1 (fr) * 2016-07-29 2018-02-01 ソニー株式会社 Unité de système optique composite et projecteur
JP2019043800A (ja) * 2017-08-31 2019-03-22 株式会社オハラ 光学ガラス、プリフォーム及び光学素子

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050157265A1 (en) * 2000-03-31 2005-07-21 Sharp Laboratories Of America, Inc. Projection display systems for light valves
JP2002208139A (ja) * 2001-01-11 2002-07-26 Ricoh Co Ltd 情報記録方法、情報記録装置及び情報処理装置
JP2004020621A (ja) * 2002-06-12 2004-01-22 Hitachi Ltd 反射型映像投射装置と、それを用いた投写型映像ディスプレイ装置、及び、それに用いる光源装置
JP2005043656A (ja) * 2003-07-22 2005-02-17 Victor Co Of Japan Ltd 投射型立体画像表示装置
JP2005157293A (ja) * 2003-10-31 2005-06-16 Victor Co Of Japan Ltd 画像表示装置
JP2015232073A (ja) * 2014-06-10 2015-12-24 株式会社フジクラ 難燃性樹脂組成物、及び、これを用いた成形体
WO2018020850A1 (fr) * 2016-07-29 2018-02-01 ソニー株式会社 Unité de système optique composite et projecteur
JP2019043800A (ja) * 2017-08-31 2019-03-22 株式会社オハラ 光学ガラス、プリフォーム及び光学素子

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