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WO2025191957A1 - Lentille de condenseur et dispositif d'affichage de type à projection - Google Patents

Lentille de condenseur et dispositif d'affichage de type à projection

Info

Publication number
WO2025191957A1
WO2025191957A1 PCT/JP2024/044635 JP2024044635W WO2025191957A1 WO 2025191957 A1 WO2025191957 A1 WO 2025191957A1 JP 2024044635 W JP2024044635 W JP 2024044635W WO 2025191957 A1 WO2025191957 A1 WO 2025191957A1
Authority
WO
WIPO (PCT)
Prior art keywords
lens
illumination light
blue
incident
green
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
PCT/JP2024/044635
Other languages
English (en)
Japanese (ja)
Inventor
康貴 在原
愛美 新島
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JVCKenwood Corp
Original Assignee
JVCKenwood Corp
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
Priority claimed from JP2024040790A external-priority patent/JP2025141051A/ja
Priority claimed from JP2024040792A external-priority patent/JP2025141052A/ja
Application filed by JVCKenwood Corp filed Critical JVCKenwood Corp
Publication of WO2025191957A1 publication Critical patent/WO2025191957A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/02—Simple or compound lenses with non-spherical faces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/12—Fluid-filled or evacuated lenses
    • 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
    • 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

  • Patent Document 1 there is a projection display device that irradiates a phosphor with blue laser light emitted from a blue laser diode and projects an image using the illumination light emitted by the phosphor.
  • a projection display device such as that described in Patent Document 1
  • the red, green, and blue illumination light may travel with a slight misalignment with each other.
  • an aspherical lens is used as the condensing lens, the red, green, and blue illumination light will still be misaligned with each other.
  • a first aspect of one or more embodiments provides a focusing lens having a first surface onto which light containing components of the red, green, and blue bands is incident, and a second surface from which the incident light containing components of the red, green, and blue bands is emitted, with an aspherical convex lens portion formed in the center of the second surface and an aspherical concave lens portion formed around the convex lens portion.
  • a second aspect of one or more embodiments provides a projection display device comprising: a blue laser diode that emits blue laser light as blue illumination light containing components in the blue band; a phosphor that receives the blue illumination light, generates and reflects yellow illumination light containing the red band and the green band, or red illumination light containing the red band and green illumination light containing the green band, from a portion of the incident blue illumination light, and reflects another portion of the incident blue illumination light; and the above-mentioned condenser lens that is disposed between the blue laser diode and the phosphor so that the blue illumination light emitted by the blue laser diode is incident on the second surface, and the yellow illumination light, or the red illumination light and the green illumination light, and the blue illumination light reflected by the phosphor are incident on the first surface.
  • the focusing lens according to one or more embodiments can reduce the deviation between the light containing components of the red band, the green band, and the blue band that emerges and travels when light containing components of these bands is incident.
  • the projection display device according to one or more embodiments can project high-quality images.
  • FIG. 1 is a diagram illustrating a projection display device according to one or more embodiments.
  • FIG. 2 is a cross-sectional view of a collecting lens according to one or more embodiments.
  • FIG. 3 is an enlarged partial cross-sectional view of a collecting lens according to one or more embodiments.
  • FIG. 4A illustrates the chromatic aberration improvement benefits of a focusing lens according to one or more embodiments.
  • FIG. 4B is a diagram showing chromatic aberration when the comparative example of the condenser lens is used.
  • FIG. 5 illustrates a first example configuration of a collection lens formed from a liquid lens according to one or more embodiments.
  • FIG. 6 illustrates a second example configuration of a collection lens formed from a liquid lens according to one or more embodiments.
  • FIG. 7 is a diagram showing an example of a configuration for controlling the lens shape of a liquid lens in a projection display device that uses a liquid lens as a condenser lens.
  • the projection display device 100 of one or more embodiments includes a light source 1, a phosphor 2, a polarization conversion element (PCS (Polarization Conversion System)) 3, a dichroic mirror 4, a cross dichroic mirror 5, a dichroic mirror 6, reflective polarizers 7R, 7G, and 7B, a color synthesis prism 8, and image display elements 10R, 10G, and 10B.
  • the projection display device 100 also includes condenser lenses 20 and 21, a relay lens 23, condenser lenses 26-29, fly-eye lenses 24 and 25, a projection lens 30, and reflective mirrors 40-42.
  • the condenser lens 21 is a condenser lens according to one or more embodiments, and is configured as an aspherical lens.
  • the condenser lens 21 may be formed from glass, or, as will be described in detail later, may be configured as a liquid lens.
  • One or more further condenser lenses may be disposed between the phosphor 2 and the condenser lens 21.
  • the condenser lens 21 is both a condenser lens and a collimator lens.
  • Light source 1 is composed of, for example, a laser array in which multiple blue laser diodes BL are arranged. The number of blue laser diodes BL is not limited.
  • Light source 1 emits blue laser light as S-polarized blue illumination light.
  • B indicates blue illumination light or blue image light, which will be described later.
  • Condenser lens 20 collects the blue illumination light emitted from light source 1.
  • Dichroic mirror 4 reflects the S-polarized blue illumination light emitted from collector lens 20 and bends the optical path of the blue illumination light by 90 degrees.
  • Collector lens 21 collects the blue illumination light and directs the collected blue illumination light to phosphor 2.
  • Phosphor 2 has a fluorescent layer that generates yellow illumination light containing red and green band components with an intensity corresponding to the energy intensity of the incident blue illumination light, and a reflective surface. A portion of the incident blue illumination light is incident on the fluorescent layer of phosphor 2, generating the yellow illumination light. The reflective surface of phosphor 2 reflects the generated yellow illumination light and another portion of the incident blue illumination light. Therefore, phosphor 2 emits blue illumination light and yellow illumination light.
  • Y represents yellow illumination light. The reflected blue illumination light is scattered within phosphor 2 and contains P-polarized light.
  • phosphor 2 may have a fluorescent layer that generates red illumination light and a fluorescent layer that generates green illumination light, and may be configured to generate red illumination light and green illumination light separately. If phosphor 2 generates red illumination light and green illumination light separately, the yellow illumination light described below will be interpreted as red illumination light and green illumination light.
  • the phosphor 2 is circular, and Figure 1 shows the side of the circular phosphor 2.
  • the phosphor 2 is configured to rotate by a rotation mechanism (not shown).
  • the P-polarized blue and yellow illumination light emitted from the phosphor 2 passes through the condenser lens 21 and dichroic mirror 4 in that order and is incident on the relay lens 23.
  • the relay lens 23 directs the incident blue and yellow illumination light to the reflecting mirror 40. Note that if the size of the dichroic mirror 4 is limited relative to the cross section of the optical path, the blue and yellow illumination light, which contains both S-polarized and P-polarized light, passes outside the dichroic mirror 4 and is incident on the relay lens 23.
  • Reflecting mirror 40 reflects the blue and yellow illumination light, bending the optical paths of the blue and yellow illumination light by 90 degrees and allowing them to enter fly-eye lens 24. Fly-eye lenses 24 and 25 homogenize the illumination distribution of the incident blue and yellow illumination light.
  • PCS 3 converts the incident blue and yellow illumination light into p-polarized light.
  • the blue and yellow illumination light emitted from PCS 3 enters cross dichroic mirror 5 via condenser lens 26.
  • Cross dichroic mirror 5 separates the blue and yellow illumination light.
  • Reflecting mirror 41 reflects the separated yellow illumination light, bending the optical path of the yellow illumination light by 90 degrees and allowing it to enter dichroic mirror 6.
  • Dichroic mirror 6 reflects the green band components contained in the yellow illumination light as green illumination light and transmits the red band components contained in the yellow illumination light as red illumination light, separating the yellow illumination light into green illumination light and red illumination light.
  • G represents green illumination light or green image light, which will be described later
  • R represents red illumination light or red image light, which will be described later.
  • the red illumination light separated by the dichroic mirror 6 is incident on the reflective polarizer 7R via the condenser lens 27.
  • the red illumination light passes through the reflective polarizer 7R and is incident on the image display element 10R.
  • the image display element 10R optically modulates the incident red illumination light according to the red component of the image data and emits s-polarized red image light.
  • the red image light is reflected by the reflective polarizer 7R and is incident on the color synthesis prism 8.
  • the green illumination light separated by the dichroic mirror 6 is incident on the reflective polarizer 7G via the condenser lens 28.
  • the green illumination light passes through the reflective polarizer 7G and is incident on the image display element 10G.
  • the image display element 10G optically modulates the incident green illumination light according to the green component of the image data and emits s-polarized green image light.
  • the green image light is reflected by the reflective polarizer 7G and is incident on the color synthesis prism 8.
  • Reflecting mirror 42 reflects the blue illumination light separated by cross dichroic mirror 5, bending the optical path of the blue illumination light by 90 degrees and allowing it to enter reflective polarizing plate 7B via condenser lens 29.
  • the blue illumination light passes through reflective polarizing plate 7B and enters image display element 10B.
  • Image display element 10B optically modulates the incident blue illumination light according to the blue component of the image data and emits s-polarized blue image light.
  • the blue image light is reflected by reflective polarizing plate 7B and enters color synthesis prism 8.
  • Reflective polarizers 7R, 7G, and 7B can be constructed, for example, from a wire grid.
  • the color synthesis prism 8 reflects the blue and red image light and transmits the green image light, synthesizing the red, green, and blue image light.
  • the projection lens 30 projects the synthesized image light onto a screen (not shown) to display a full-color image.
  • the condenser lens 21 has a first surface 211 and a second surface 212 opposite the first surface 211.
  • the first surface 211 is an incident surface onto which the blue illumination light and yellow illumination light emitted from the phosphor 2 in Figure 1, i.e., light containing components of the red, green, and blue bands, are incident.
  • the second surface 212 is an exit surface from which the incident blue illumination light and yellow illumination light exit, and is also an incident surface onto which the blue illumination light emitted from the light source 1 (blue laser diode BL) in Figure 1 is incident.
  • the condenser lens 21 has a circular shape when viewed from the first surface 211 or the second surface 212.
  • the first surface 211 is flat, but the first surface 211 may also be convex.
  • An aspherical convex lens portion 213 is formed in the center of the second surface 212.
  • An aspherical concave lens portion 214 is formed around the convex lens portion 213 on the second surface 212.
  • the concave lens portion 214 is formed between the peripheral edge of the convex lens portion 213 and the peripheral edge 215 of the condenser lens 21.
  • the center of the convex lens portion 213 coincides with the center of the condenser lens 21.
  • the convex lens portion 213 and the concave lens portion 214 are connected to each other at the inflection point Pif.
  • the lowest point of the concave lens portion 214 that is closest to the first surface 211 is designated as P0.
  • the concave lens portion 214 has the shape shown by the solid line
  • the lowest point P0 is located relatively close to the convex lens portion 213.
  • the concave lens portion 214 has the shape shown by the dashed line
  • the lowest point P0 is located relatively close to the peripheral edge 215.
  • the concave lens portion 214 has the shape shown by the dotted line
  • the lowest point P0 is located at a position that coincides with the peripheral edge 215.
  • the inventors' testing has revealed that, in order to improve chromatic aberration, as described below, it is preferable for the lowest point P0 of the concave lens portion 214 to be located more inward than the peripheral edge 215.
  • the lowest point P0 is continuous in the circumferential direction, so the lowest point of the circle closest to the first surface 211 of the concave lens portion 214 is located more inward than the peripheral edge 215.
  • the effect of improving chromatic aberration achieved by the condenser lens 21 will be explained using Figure 4A and Figure 4B, which is a comparative example.
  • the first surface 211 is convex, specifically a spherical surface.
  • condenser lenses 22a and 22b are positioned between the phosphor 2 and the condenser lens 21.
  • Collecting lens 22a has a concave surface at the center of the light incident surface on the side facing phosphor 2, and a convex surface on the light exit surface.
  • Concentrating lens 22b has a concave surface at the center of the light incident surface on the side facing collecting lens 22a, and a convex surface on the light exit surface.
  • the concave and convex surfaces of collecting lens 22a and the concave and convex surfaces of collecting lens 22b are spherical.
  • the projection display device 100 comprises a blue laser diode BL and phosphor 2.
  • the blue laser diode BL emits blue laser light as blue illumination light containing a blue band component.
  • the phosphor 2 receives the blue illumination light and generates and reflects yellow illumination light containing a red band and a green band, or red illumination light containing a red band and green illumination light containing a green band, using a portion of the blue illumination light that has been incident on it.
  • the phosphor 2 also reflects the other portion of the blue illumination light that has been incident on it.
  • Projection display device 100 is equipped with a condenser lens 21 positioned between blue laser diode BL and phosphor 2.
  • Condenser lens 21 is an aspherical lens whose exit surface receives the blue illumination light emitted by blue laser diode BL, and whose entrance surface receives the yellow illumination light, red illumination light, and green illumination light reflected by phosphor 2, as well as the blue illumination light reflected by phosphor 2.
  • Condenser lens 21 has an aspherical convex lens portion 213 formed in the center of the exit surface, and an aspherical concave lens portion 214 formed around convex lens portion 213. This reduces the deviation of the red, green, and blue band components of light due to chromatic aberration as they exit the exit surface and travel.
  • Figure 5 shows liquid lens 21L1, which is a first configuration example that can be used to form the condenser lens 21
  • Figure 6 shows liquid lens 21L2, which is a second configuration example that can be used to form the condenser lens 21.
  • the liquid lens 21L1 comprises a first liquid storage section 2a and a second liquid storage section 2b.
  • the first liquid storage section 2a has a liquid sealed between a non-flexible transparent conductive plate 2a0 and an elastic transparent film 2a1.
  • a plurality of flexible transparent electrodes 2a21, 2a22, and 2a23 are attached to the upper surface of the transparent film 2a1.
  • the number of transparent electrodes attached to the upper surface of the transparent film 2a1 is not limited to three, and more transparent electrodes may be attached to the upper surface of the transparent film 2a1.
  • the transparent conductive plate 2a0 and the transparent electrodes 2a21, 2a22, and 2a23 are electrodes that face each other.
  • the shape of the first liquid storage section 2a can be precisely controlled. It is recommended that the transparent electrodes attached to the upper surface of the transparent film 2a1 be divided in the radial and circumferential directions.
  • the first liquid storage section 2a is connected to the liquid tank 2a5 by the connecting section 2a4.
  • the actuator 2a6 applies force to the liquid in the liquid tank 2a5.
  • a pressure sensor 2a7 is provided within the liquid tank 2a5.
  • DC variable voltage sources 2a31, 2a32, and 2a33 are connected between the transparent conductive plate 2a0 and the transparent electrodes 2a21, 2a22, and 2a23, respectively.
  • the first liquid storage section 2a When a voltage is applied between the transparent conductive plate 2a0 and the transparent electrodes 2a21, 2a22, and 2a23 by the variable voltage sources 2a31, 2a32, and 2a33, the first liquid storage section 2a functions as a capacitor, and is charged with opposite positive and negative charges, causing an electrostatic attraction force to act between the transparent conductive plate 2a0 and the transparent electrodes 2a21, 2a22, and 2a23.
  • the first liquid storage section 2a can displace the transparent film 2a1 to shorten the distance between the transparent conductive plate 2a0 and the transparent electrodes 2a21, 2a22, and 2a23 by strengthening the electrostatic attraction acting between the transparent conductive plate 2a0 and the transparent electrodes 2a21, 2a22, and 2a23.
  • the first liquid storage section 2a can displace the transparent film 2a1 to lengthen the distance between the transparent conductive plate 2a0 and the transparent electrodes 2a21, 2a22, and 2a23 by weakening the electrostatic attraction acting between the transparent conductive plate 2a0 and the transparent electrodes 2a21, 2a22, and 2a23.
  • the actuator 2a6 applies a force to the liquid in the liquid tank 2a5, thereby maintaining the shape of the first liquid storage section 2a.
  • the actuator 2a6 applies a force to the liquid in the liquid tank 2a5 in accordance with the pressure detected by the pressure sensor 2a7.
  • the second liquid storage section 2b has liquid sealed between non-flexible transparent conductive plates 2a0 and 2b0, an elastic transparent membrane 2b1, and a non-flexible, non-conductive side wall 2d.
  • a plurality of flexible transparent electrodes 2b21, 2b22, 2b23, and 2b24 are attached to the underside of the transparent membrane 2b1.
  • Transparent electrodes 2b21, 2b22, 2b23, and 2b24 may also be attached to the upper surface of the transparent membrane 2b1.
  • the number of transparent electrodes attached to the upper surface of the transparent membrane 2b1 is not limited to four, and more transparent electrodes may be attached to the upper surface of the transparent membrane 2b1.
  • the transparent conductive plates 2b0 and the transparent electrodes 2b21, 2b22, 2b23, and 2b24 are electrodes that face each other.
  • the second liquid storage section 2b is connected to the liquid tank 2b5 by the connecting section 2b4.
  • the actuator 2b6 applies force to the liquid in the liquid tank 2b5.
  • a pressure sensor 2b7 is provided within the liquid tank 2b5.
  • DC variable voltage sources 2b31, 2b32, 2b33, and 2b34 are connected between the transparent conductive plate 2b0 and the transparent electrodes 2b21, 2b22, 2b23, and 2b24, respectively.
  • the second liquid storage section 2b When a voltage is applied between the transparent conductive plate 2b0 and the transparent electrodes 2b21, 2b22, 2b23, and 2b24 by the variable voltage sources 2b31, 2b32, 2b33, and 2b34, the second liquid storage section 2b functions as a capacitor, and is charged with opposite positive and negative charges, causing an electrostatic attraction force to act between the opposing transparent conductive plate 2b0 and the transparent electrodes 2b21, 2b22, 2b23, and 2b24.
  • the second liquid storage section 2b can displace the transparent film 2b1 to shorten the distance between the transparent conductive plate 2b0 and the transparent electrodes 2b21, 2b22, 2b23, and 2b24 by strengthening the electrostatic attraction acting between the transparent conductive plate 2b0 and the transparent electrodes 2b21, 2b22, 2b23, and 2b24.
  • the second liquid storage section 2b can displace the transparent film 2b1 to lengthen the distance between the transparent conductive plate 2b0 and the transparent electrodes 2b21, 2b22, 2b23, and 2b24 by weakening the electrostatic attraction acting between the transparent conductive plate 2b0 and the transparent electrodes 2b21, 2b22, 2b23, and 2b24.
  • the actuator 2b6 applies a force to the liquid in the liquid tank 2b5, thereby maintaining the shape of the second liquid storage section 2b.
  • the actuator 2b6 applies a force to the liquid in the liquid tank 2b5 according to the pressure detected by the pressure sensor 2b7.
  • the lower surface of the transparent conductive plate 2b0 corresponds to the first surface 211 in the focusing lens 21 shown in Figure 2, and the transparent films 2a1 and 2b1 correspond to the second surface 212.
  • the transparent film 2a1 portion of the first liquid storage section 2a functions as a first lens section with a controllable lens shape, formed in the center of the second surface of the opposing first and second surfaces.
  • the first lens section is a convex lens section.
  • the transparent film 2b1 portion of the second liquid storage portion 2b functions as a second lens portion formed around the center of the second surface, the lens shape of which can be controlled independently of the first lens portion.
  • the second lens portion is a concave lens portion.
  • the liquid lens 21L2 comprises a first liquid storage section 2a, a second liquid storage section 2b, and a third liquid storage section 2c.
  • the second liquid storage section 2b has a liquid sealed between a non-flexible transparent conductive plate 2b0, an elastic transparent film 2b1, and a non-flexible, non-conductive side wall 2d.
  • the third liquid storage section 2c has a liquid sealed between a non-flexible transparent conductive plate 2a0 and elastic transparent films 2b1 and 2c1.
  • the third liquid storage section 2c is connected to the liquid tank 2c5 by a connecting section 2c4.
  • An actuator 2c6 applies force to the liquid in the liquid tank 2c5.
  • a pressure sensor 2c7 is provided within the liquid tank 2c5.
  • the third liquid storage section 2c may also be provided with a configuration for controlling its shape using electrostatic attraction.
  • the liquid lens 21L2 shown in Figure 6 makes it possible to control the shape of the second lens portion with greater precision than the liquid lens 21L1 shown in Figure 5.
  • the shapes of the first and second lens portions may be controlled by force from an actuator instead of electrostatic attraction.
  • the projection display device 100 can use the liquid lens 21L1 shown in FIG. 5 or the liquid lens 21L2 shown in FIG. 6 as the condenser lens 21.
  • the control unit 50 can control the lens shape of the liquid lens 21L1 or 21L2 in response to user input via the input unit 51.
  • the projection display device 100 may be able to select, for example, a mode in which an image is projected using the entire projectable range, or a mode in which a high-brightness image is projected using only the center of the projectable range.
  • the control unit 50 controls the lens shape of the liquid lens 21L1 or 21L2 so that the lens shape corresponds to the selected mode.
  • the control unit 50 may calculate the lens shape corresponding to the selected mode, or may select the lens shape corresponding to the selected mode from a table.
  • the control unit 50 When a mode in which an image is projected using the entire projectable range is selected, the control unit 50 should control the lens shape of the liquid lens 21L1 or 21L2 so that the lens shape minimizes chromatic aberration. When a mode in which a high-brightness image is projected using only the center of the projectable range is selected, the control unit 50 should control the lens shape of the liquid lens 21L1 or 21L2 so that the amount of light in the center is maximized.
  • control unit 50 and input unit 51 may be configured within the projection display device 100, or may be external devices such as a personal computer.
  • the image to be projected onto the screen may be captured by an imaging device, and the desired projection characteristics may be confirmed and fed back to the control unit 50.

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

Abstract

Une lentille de condenseur (21) comprend une première surface (211) et une seconde surface (212). La lumière comprenant des composantes de la bande rouge, de la bande verte et de la bande bleue est incidente sur la première surface (211). La lumière incidente comprenant les composantes de la bande rouge, de la bande verte et de la bande bleue est émise à partir de la seconde surface (212). Une section de lentille convexe asphérique (213) est formée au centre de la seconde surface (212). Une section de lentille concave asphérique (214) est formée autour de la section de lentille convexe (213).
PCT/JP2024/044635 2024-03-15 2024-12-17 Lentille de condenseur et dispositif d'affichage de type à projection Pending WO2025191957A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2024-040790 2024-03-15
JP2024-040792 2024-03-15
JP2024040790A JP2025141051A (ja) 2024-03-15 2024-03-15 集光レンズ及び投射型表示装置
JP2024040792A JP2025141052A (ja) 2024-03-15 2024-03-15 集光レンズ及び投射型表示装置

Publications (1)

Publication Number Publication Date
WO2025191957A1 true WO2025191957A1 (fr) 2025-09-18

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WO (1) WO2025191957A1 (fr)

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JP2014163963A (ja) * 2013-02-21 2014-09-08 Univ Of Tokyo 液体デバイス
JP2016170390A (ja) * 2015-03-09 2016-09-23 セイコーエプソン株式会社 光源装置及びプロジェクター
JP2017194523A (ja) * 2016-04-19 2017-10-26 キヤノン株式会社 光源装置および画像投射装置
US20220043190A1 (en) * 2019-01-07 2022-02-10 Lg Innotek Co., Ltd. Image capturing lens

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10221598A (ja) * 1998-03-06 1998-08-21 Hitachi Ltd 投写用レンズ装置及びそれを用いたプロジェクションテレビジョン装置
JP2002243918A (ja) * 2001-02-14 2002-08-28 Olympus Optical Co Ltd 可変焦点レンズ、光学特性可変光学素子及び光学装置
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