WO2015151255A1 - Plaque guide de lumière et dispositif l'utilisant - Google Patents

Plaque guide de lumière et dispositif l'utilisant Download PDF

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Publication number
WO2015151255A1
WO2015151255A1 PCT/JP2014/059823 JP2014059823W WO2015151255A1 WO 2015151255 A1 WO2015151255 A1 WO 2015151255A1 JP 2014059823 W JP2014059823 W JP 2014059823W WO 2015151255 A1 WO2015151255 A1 WO 2015151255A1
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WO
WIPO (PCT)
Prior art keywords
light
guide plate
light guide
grating
incident
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Application number
PCT/JP2014/059823
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English (en)
Japanese (ja)
Inventor
島野　健
Original Assignee
日立マクセル株式会社
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Publication date
Application filed by 日立マクセル株式会社 filed Critical 日立マクセル株式会社
Priority to PCT/JP2014/059823 priority Critical patent/WO2015151255A1/fr
Publication of WO2015151255A1 publication Critical patent/WO2015151255A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer

Definitions

  • the present invention relates to a color-forming light guide plate used for design illumination and the like, and an apparatus using the same.
  • the existing light guide plate is used for the backlight of the liquid crystal display, there is no wavelength selectivity regarding the emitted light. Therefore, the emitted light from such a light guide plate is generally the same color as the illumination light source. Therefore, the following techniques have been proposed as techniques for examining the wavelength selectivity of the emitted light in the light guide plate.
  • the light guide plate and a multilayer filter formed on at least one of the two opposing surfaces of the light guide plate and alternately laminated with a high refractive index dielectric layer and a low refractive index dielectric layer are provided.
  • an optical element see Patent Document 1 is proposed in which the film thickness is continuously changed within the at least one surface.
  • the emitted light can be colored, but energy loss of the wavelength absorbed by the color filter occurs.
  • the wavelength selectivity is maintained over a wide range of incident angles that are greater than the critical angle of total reflection due to the angle selectivity characteristic of the reflective volume hologram.
  • the degree of freedom in design is limited and the application range tends to be narrow.
  • an object of the present invention is to provide a technology of a light guide plate that can be applied to a light source having a wide light emission angle distribution and that is low in production cost and light amount loss accompanying wavelength selection.
  • the configuration described in the claims is adopted.
  • the present application includes a plurality of means for solving the above-mentioned problems.
  • the light guide plate includes diffraction gratings on the upper surface and the lower surface of the transparent substrate.
  • an illumination device using the light guide plate of the present invention includes a light guide plate having diffraction gratings on the upper surface and the lower surface of a transparent substrate, a light source that makes light incident on a predetermined end surface of the light guide plate, and a drive device for the light source. It is characterized by having.
  • the apparatus of the present invention includes a lighting device including a light guide plate having diffraction gratings on the upper surface and the lower surface of the transparent substrate, a light source that makes light incident on a predetermined end surface of the light guide plate, and a drive device for the light source. It is characterized by doing.
  • a light guide plate that can be applied to a light source having a wide light emission angle distribution and that has a small amount of light loss due to manufacturing cost and wavelength selection.
  • FIG. 1 is a diagram illustrating a configuration example of a light guide plate 100 in the first embodiment.
  • the light guide plate 100 shown in FIG. 1 is applicable to a light source having a wide light emission angle distribution, and is a light guide plate with little manufacturing cost and less light loss due to wavelength selection.
  • white light 103 incident light
  • a white LED light source 102 is incident on a transparent light guide plate substrate 101 included in the light guide plate 100.
  • the light incident surface 1013 of the light guide plate substrate 101 is obliquely cut away from the perpendicular 1014, and the light beam having the highest intensity of the incident white light 103 has a critical angle of total reflection in the light guide plate substrate 101. It is set to have a predetermined incident angle ⁇ 0 which is about the middle of 90 °.
  • the light guide plate substrate 101 includes lattice regions 104, 105, and 106 in which lattices having different lattice depths and lattice pitches are formed.
  • the grating regions 104, 105, and 106 are regions that emit light having different wavelengths, and the white light 103 incident from the incident surface 1013 is light having a wavelength for each region in the order in which the lattice regions 104 to 106 are arranged. Is continuously transmitted.
  • the inclination directions of the grating surfaces 1041 and 1042 are parallel to each other, and the grating pitch p and the grating depth d are made equal.
  • the inclination directions of the grating surfaces 1051 and 1052 are parallel to each other, and the grating pitch p and the grating depth d are respectively set. equal.
  • the diffraction angles by the blazed diffraction grating become ⁇ 1 , ⁇ 2 , and ⁇ 3 , they are diffracted in the opposite direction by the blazed diffraction grating facing the upper surface 1011 and the lower surface 1012.
  • the original incident angle ⁇ 0 is restored, and basically the diffracted light can be stably propagated through the light guide plate 10.
  • a blazed diffraction grating can obtain diffracted light with a diffraction efficiency of 100% in principle at an incident angle and wavelength satisfying the blaze condition if the reflectance at the interface is 100% due to total reflection or the like. Can do. Under such conditions, light can propagate with 100% efficiency in the light guide plate as described above with the blazed grating facing each other.
  • unit lattice regions 120 and 122 in which lattice grooves are continuously disposed are intermittently disposed with the planar regions 121 and 13 interposed therebetween. Further, the interval between the unit cell regions 120 and 122, that is, the planar regions 121 and 123 are gradually narrowed in the light guide direction.
  • This configuration is illustrated only for the lattice region 104 in FIG. 1, but the same applies to the other lattice regions 105 and 106.
  • the number of lattices in the rightmost unit lattice region 1201 in the drawing is larger than the number of lattices in the previous unit lattice regions 1202 and 1203.
  • the light is basically designed to be emitted only from the unit lattice region 120 on the upper surface 1011 of the light guide plate 100. Since the local emission efficiency is constant, the shorter the light guide distance is, the longer the lattice is. The emitted light intensity is increased. However, in the light guide plate 100, it is ideal that the output light intensity is equal regardless of the light guide distance. Thus, the unit cell region is made intermittent in this way, and the average output light intensity is made uniform by changing the interval. I am trying.
  • Such uniforming of the emitted light intensity may be achieved by gradually increasing the effective area where the grating is formed in the light guide direction of the light guide plate 100 as the distance from the incident surface 1013 increases. Therefore, instead of changing the interval between the unit lattice regions 120, 122 having the same number of lattices, that is, the size of the planar regions 121, 123, the interval between the unit lattice regions 120, 122 is the same, and each unit lattice region 120, The number of grids 122 may be gradually increased as the distance from the incident surface 1013 increases. However, in order to obtain the light diffraction effect, a certain number of continuous lattices of several tens are necessary (in the light guide plate 100 in FIG. 1, the number of lattices is smaller than the actual number for simplification. is doing).
  • the white incident light 103 incident on the incident surface 1013 of the light guide plate 100 from the LED light source 102 has light of three wavelength components of ⁇ 1, ⁇ 2, and ⁇ 3.
  • 106 are designed so that the wavelength regions of the light emitted from the upper surface 1011 are different by changing the groove shape of the grating. Since light in the wavelength band near ⁇ 1 is mainly emitted in the grating region 104, the remaining light in the wavelength bands of ⁇ 2 and ⁇ 3 is dominant in the light beam 113 incident on the grating region 105. In addition, in the grating region 105, light of ⁇ 2 is mainly emitted. Similarly, in the light beam 114 incident on the grating region 106, the remaining light in the wavelength band centering on ⁇ 3 is dominant, and in the grating region 106, light having a wavelength of ⁇ 3 is mainly emitted.
  • the diffracted light traveling from the unit cell region 122 on the lower surface 1012 toward the upper surface 1011 is incident again on the corresponding unit cell region 120 on the upper surface 1011, and the unit cell regions 120 on the upper surface 1011 and the lower surface 1012.
  • the boundary position 122 is shifted.
  • the diffraction angle from the blazed diffraction grating of the upper surface 1011 is ⁇ 0. Will not return. However, if it is a diffraction angle at which light can be guided stably, light guide is continued at that angle.
  • the light emitted from the upper surface 1011 of the light guide plate 100 causes the diffraction efficiency on the transmission side of the upper surface 1011 to be higher than other wavelengths at a specific wavelength due to the wavelength dependence of the diffraction angle of the blazed diffraction grating.
  • the condition is basically that no outgoing light is generated at a nearby wavelength, and thus the outgoing angle of the outgoing light is an outgoing angle with a large surface grazing of the light guide plate substrate 101. Therefore, in order for the observer to recognize the emitted light directly facing the surface of the light guide plate, a diffusion plate 115 is disposed on the emission surface with an air gap 118 interposed therebetween.
  • a support member 116 is disposed between the upper surface 1011 and the diffusion plate 115 to the extent that light emission is not hindered.
  • the lower surface 1012 is coated with a metal film 117 in order to reduce the light amount loss due to the transmitted light on the lower surface 1012.
  • FIG. 2 shows a blue light having a wavelength of 0.45 ⁇ m at an incident angle of 50 ° on an opposed blazed diffraction grating (corresponding to a unit grating region) having a medium refractive index of 1.5, a pitch of 2.4 ⁇ m, and a grating depth of 0.32 ⁇ m. It is a light ray figure of diffracted light at the time of making enter.
  • the light beam angle it is shown that from the second-order diffracted light to the 11th-order diffracted light can be emitted from the upper surface 1011 of the light guide plate 100, and the second-order diffracted light or less cannot be emitted and is totally reflected. Further, the ⁇ 1st order diffracted light of the first order diffracted light reflected by the upper surface 1011 is incident on the lower surface 1012 again at the same incident angle of 50 ° as the original incident light. That is, this becomes stable propagation light.
  • FIG. 3 shows the efficiency of each diffracted light beam emitted from the upper surface 1011 in FIG. 2 described above.
  • the second-order diffracted light is emitted from the upper surface 1011 with an efficiency of about 45%, but it can be seen that the efficiency of other orders is small.
  • FIG. 4 shows the efficiency of each order of light reflected by the upper surface 1011.
  • the first-order diffracted light is reflected into the light guide plate substrate 101 with a diffraction efficiency of 40%.
  • FIG. 5 shows a calculation result of diffraction efficiency in which the first-order diffracted light reflected from the upper surface 101 is diffracted by the blazed diffraction grating on the upper surface 101 when the intensity of the original incident light 103 is 1. It can be seen that the efficiency of ⁇ 1st order light that can be stably propagated is about 20%.
  • FIG. 6 is a ray diagram when red light having a wavelength of 0.65 ⁇ m is incident on the same grating at the same incident angle. It can be seen that the light rays that can be emitted from the upper surface 1011 are the second-order light to the seventh-order light, and the orders below the first-order diffracted light are also totally reflected in the light guide plate substrate 101.
  • FIG. 7 shows the efficiency of each order of diffracted light emitted from the upper surface 1011 in FIG. Like the blue light, the second-order diffracted light has the largest amount of light, but the efficiency is about 9%, which is much smaller than the blue light.
  • FIG. 8 shows each diffraction efficiency of the reflected light reflected from the upper surface 1011 in FIG. It can be seen that the first-order diffracted light is reflected into the light guide plate substrate 101 with an efficiency of about 80%.
  • FIG. 9 shows the diffraction efficiency when the first-order diffracted light reflected in FIG. 8 is diffracted by the diffraction grating on the upper surface 1011. It can be seen that while the efficiency is almost 80%, it is diffracted as ⁇ 1st order light and becomes propagating light at the same incident angle as the incident light 103.
  • FIG. 10 shows the top surface emission efficiency and propagation efficiency averaged over an angle range from 45 ° to 75 ° in the present embodiment. It can be seen from the horizontal axis of the graph of FIG. 10 that the blue light propagation efficiency corresponding to the short wavelength region is low and the emission efficiency is large.
  • FIG. 11 shows the light guide plate substrate 101 with a thickness of 3 mm and a structure in which diffraction regions are continuously formed (a structure that is not discrete and does not include the planar region 121) and is uniform from the amount of light emitted per propagation length. This is a logarithm of the light emission intensity per unit length with respect to the propagation distance when it is assumed that light is emitted. As shown in this graph, although the emission intensity of blue light is large at a propagation distance of 0, it can be seen that the intensity rapidly decreases as the propagation distance increases.
  • FIG. 12 shows the ratio of providing the diffraction grating region in the propagation distance in the light guide direction of the light guide plate 100 in order to improve the situation of FIG. 11 and make the light emission intensity uniform.
  • the ratio of the grating region is set to about 10% at the light incident position, and the ratio is set to gradually increase as the propagation distance increases from there.
  • the light emission intensity distribution in the light guide plate subjected to such measures is as shown in FIG.
  • FIG. 13 shows the emission intensity distribution in the light guide plate compensated based on the characteristics of FIG. 12 for each wavelength.
  • the vertical axis is not logarithmic but linear coordinates.
  • the intensity of blue light having a wavelength of 0.45 ⁇ m increases up to a propagation distance of about 50 mm.
  • FIG. 14 is a diagram showing an emission spectrum for each propagation distance in the compensated light guide plate. In this graph, it can be seen that blue light is dominant when the propagation distance is short, but red light becomes dominant as the propagation distance becomes longer.
  • FIG. 15 shows the top surface when blue light having a wavelength of 0.45 ⁇ m is incident on an opposing blazed diffraction grating having a medium refractive index of 1.5, a pitch of 2.4 ⁇ m, and a grating depth of 0.21 ⁇ m.
  • the efficiency of each diffracted light emitted from 1011 is shown. Although the diffracted light of the second order or higher is emitted, it can be seen that the efficiency is as small as 3% or less.
  • FIG. 16 shows the efficiency of each subsequent light reflected from the upper surface 1011.
  • the first-order diffracted light is reflected into the light guide plate substrate 101 with a diffraction efficiency of 80% or more.
  • FIG. 17 shows a calculation result of diffraction efficiency in which the first-order diffracted light reflected from the upper surface 1011 is diffracted by the blazed diffraction grating on the upper surface 1011 when the intensity of the original incident light 103 is 1.
  • the efficiency of ⁇ 1st order light that can be stably propagated is 80% or more.
  • FIG. 18 shows the efficiency of each order of diffracted light emitted from the upper surface 1011 when red light having a wavelength of 0.65 ⁇ m is incident on the same grating at the same incident angle.
  • red light having a wavelength of 0.65 ⁇ m is incident on the same grating at the same incident angle.
  • first-order diffracted light is emitted with an efficiency of 40% or more.
  • FIG. 19 shows the diffraction efficiency of the reflected light reflected from the upper surface 1011 shown in the graph of FIG. In this graph, it can be seen that the 0th order light and the 1st order diffracted light are reflected into the light guide plate substrate 101 with an efficiency of about 20%.
  • FIG. 20 shows the diffraction efficiency when the reflected first-order diffracted light shown in the graph of FIG. 19 is diffracted by the diffraction grating on the upper surface 1011.
  • the light is diffracted as ⁇ 1st order light with an efficiency of almost 20%, and becomes propagating light at the same incident angle as the incident light 103.
  • the graph of FIG. 19 since the 0th-order light has the same amount of light, the light propagating at the original incident angle is estimated to be about 40%.
  • FIG. 21 is a diagram showing the upper surface emission efficiency and propagation efficiency averaged over an angle range from an incident angle of 45 ° to 75 ° in the present example. Unlike the graph of FIG. 10, it can be seen that the propagation efficiency of red light is low and the amount of emitted light is large.
  • FIG. 22 shows a structure in which the light guide plate substrate 101 has a thickness of 3 mm and diffraction grating regions are continuously formed (a structure that is not discrete and does not include the planar region 121). It is the graph which showed the emitted light intensity per unit length with respect to propagation distance by the logarithm on the assumption that light is radiate
  • FIG. 23 shows the ratio of providing the diffraction grating region in the propagation distance in the light guide direction of the light guide plate 100 in order to improve the situation of FIG. 22 and make the light emission intensity uniform.
  • the ratio of the grating region is set to about 10% at the light incident position, and the ratio is set to gradually increase as the propagation distance increases from there.
  • the light emission intensity distribution in the light guide plate subjected to such measures is as shown in FIG.
  • FIG. 24 shows the emission intensity distribution in the light guide plate compensated based on the characteristics of FIG. 23 for each wavelength.
  • the vertical axis is not a logarithm but a linear coordinate. In the graph of FIG. 24, it can be seen that the intensity of red light having a wavelength of 0.6 to 0.65 ⁇ m is increased up to a propagation distance of about 80 mm.
  • FIG. 25 is a diagram showing an emission spectrum for each propagation distance. In this graph, it can be seen that red light is dominant when the propagation distance is short, but blue light becomes dominant as the propagation distance becomes longer.
  • FIG. 26 is a diagram illustrating a configuration example of an illumination device 200 using the light guide plate 100 in the present embodiment.
  • the conventional light guide plate 100 is often used as a monochromatic light source such as a backlight of a liquid crystal panel.
  • FIG. 26 shows an example in which the light guide plate 100 is mounted as the illumination device 200 that emits light of a plurality of colors.
  • the lighting device 200 includes a casing 210 made of resin or metal and having appropriate strength and heat dissipation efficiency, a glass panel 201 fitted in one surface of the casing 210, and the glass panel.
  • a light guide plate 100 that emits light via a diffuser plate 115, a white LED light source 102 that irradiates incident light on the end surface of the light guide plate 100, and the white LED light source 102 is driven and controlled.
  • An LED driving circuit 202 driving device such as a driver IC and a power source 205 that supplies electricity to the LED driving circuit 202 are configured.
  • FIG. 27 is a diagram illustrating a configuration example of the mobile terminal 300 using the lighting device 200 according to the present embodiment.
  • the example of the portable terminal 300 which incorporates the illuminating device 200 mentioned above and utilizes light emission for alerting a user or transmitting various information is shown.
  • the illumination device 200 incorporated in a part of the liquid crystal screen 301 emits uniform light in a wavelength selective manner regardless of the distance in the light guide direction.
  • the light guide plate 100 in the illumination device 200 emits a total of three colors of red, green, and blue.
  • the mounting example of such a light guide plate 100 is not limited to the above example.
  • the light guide plate 100 can be applied to display lamps (head lamps and tail lamps on the exterior of the vehicle body, turn indicators, interior lamps on the vehicle interior, and display instrument lamps) for various transport machines such as automobiles.
  • a light guide plate that can be applied to a light source having a wide light emission angle distribution and that has a small amount of light loss due to manufacturing cost and wavelength selection.
  • the diffraction grating is formed by unevenness of the transparent substrate.
  • the diffraction grating may be formed by discretely forming a plurality of grating regions formed by continuous groove-shaped gratings along the light guide direction.
  • the light emission intensity (outgoing light) can be made uniform along.
  • the interval between the plurality of discretely formed lattice regions may be gradually narrowed along the light guide direction.
  • the intensity of emitted light near the incident position on the light guide plate is appropriately suppressed, while the presence of the lattice area per unit light guide distance is suppressed.
  • an appropriate emitted light intensity can be obtained even at a position away from the incident position.
  • the number of lattices in each of the plurality of discretely formed lattice regions may be gradually increased along the light guide direction.
  • the intensity of the emitted light near the incident position on the light guide plate is appropriately suppressed, while by increasing the number of gratings in the grating region, the distance from the incident position is increased. An appropriate outgoing light intensity can be obtained even at the position.
  • the diffraction grating is a blazed diffraction grating, and the inclination directions of the grating surfaces are the same between the diffraction grating on the upper surface and the diffraction grating on the lower surface. It is.
  • the diffraction grating is a blazed diffraction grating, and one of the diffraction gratings on the upper surface and the lower surface has a large incident angle of light to be guided. It is preferable that the other lattice plane is inclined in the direction in which the incident angle of light to be guided is reduced.
  • the incident light incident from the end face of the light guide plate can continue to propagate between the grating surfaces of the diffraction gratings on the upper surface and the lower surface without disturbing the reflection angle.
  • the transmitted light can be transmitted to the light source, and the light amount loss can be further effectively reduced.
  • the grating surface inclined in the direction in which the incident angle of the light to be guided is reduced is assumed to be a metal film deposited. Is preferable.
  • the incident light incident from the end face of the light guide plate can continue to propagate between the grating surfaces of the diffraction gratings on the upper surface and the lower surface without disturbing the reflection angle.
  • a member having a diffusion surface is disposed on the outer surface of the light guide plate on the surface side close to the lattice surface inclined in the direction in which the incident angle of the light to be guided increases. If so, it is preferable.
  • a plurality of grating regions having different grating depths or grating pitches of the diffraction grating may be arranged along the light guide direction.
  • the angle of the end surface on which the light to be guided is incident with respect to the transparent substrate surface is an angle in a range where the propagation efficiency of the light guided in the light guide plate is equal to or greater than a predetermined value. If it is not vertical, it is preferable.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)

Abstract

Le problème posé par l'invention consiste à fournir une plaque guide de lumière pouvant être utilisée avec une source de lumière ayant une large distribution angulaire d'émission de lumière et pour laquelle les coûts de fabrication et la perte de quantité de lumière associée à la sélection de longueurs d'onde sont faibles. La solution de l'invention porte sur une plaque (100) guide de lumière ayant une configuration dans laquelle une pluralité de réseaux de diffraction (107-112) formés par des irrégularités dans un substrat transparent (101) sont distinctement prévus le long de la direction du guide de lumière sur la surface supérieure (1011) et la surface inférieure (1012) du substrat transparent (101).
PCT/JP2014/059823 2014-04-03 2014-04-03 Plaque guide de lumière et dispositif l'utilisant WO2015151255A1 (fr)

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PCT/JP2014/059823 WO2015151255A1 (fr) 2014-04-03 2014-04-03 Plaque guide de lumière et dispositif l'utilisant

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Application Number Priority Date Filing Date Title
PCT/JP2014/059823 WO2015151255A1 (fr) 2014-04-03 2014-04-03 Plaque guide de lumière et dispositif l'utilisant

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WO2015151255A1 true WO2015151255A1 (fr) 2015-10-08

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108603986A (zh) * 2016-01-30 2018-09-28 镭亚股份有限公司 具有转换视图的基于多波束元件的背光
US11143810B2 (en) * 2017-04-04 2021-10-12 Leia Inc. Unilateral backlight, multiview display, and method employing slanted diffraction gratings
JP2022530185A (ja) * 2019-04-03 2022-06-28 カール ツァイス イエナ ゲゼルシャフト ミット ベシュレンクテル ハフツング 光導波路を用いて配光を生成する装置
US11812738B2 (en) 2010-03-08 2023-11-14 Monsanto Technology Llc Polynucleotide molecules for gene regulation in plants
US12076572B2 (en) 2019-04-03 2024-09-03 Carl Zeiss Ag Device for supplying energy to an active eye implant

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002182201A (ja) * 2000-12-11 2002-06-26 Shigeto Omori 映像表示装置
JP2005115176A (ja) * 2003-10-09 2005-04-28 Internatl Business Mach Corp <Ibm> 分光素子、回折格子、複合回折格子、カラー表示装置、分波器、および回折格子の製造方法
WO2010010749A1 (fr) * 2008-07-22 2010-01-28 シャープ株式会社 Unité à rétroéclairage et dispositif d'affichage à cristaux liquides
JP2010040415A (ja) * 2008-08-07 2010-02-18 Sharp Corp バックライトユニットおよび液晶表示装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002182201A (ja) * 2000-12-11 2002-06-26 Shigeto Omori 映像表示装置
JP2005115176A (ja) * 2003-10-09 2005-04-28 Internatl Business Mach Corp <Ibm> 分光素子、回折格子、複合回折格子、カラー表示装置、分波器、および回折格子の製造方法
WO2010010749A1 (fr) * 2008-07-22 2010-01-28 シャープ株式会社 Unité à rétroéclairage et dispositif d'affichage à cristaux liquides
JP2010040415A (ja) * 2008-08-07 2010-02-18 Sharp Corp バックライトユニットおよび液晶表示装置

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11812738B2 (en) 2010-03-08 2023-11-14 Monsanto Technology Llc Polynucleotide molecules for gene regulation in plants
CN108603986A (zh) * 2016-01-30 2018-09-28 镭亚股份有限公司 具有转换视图的基于多波束元件的背光
CN108603986B (zh) * 2016-01-30 2021-06-01 镭亚股份有限公司 具有转换视图的基于多波束元件的背光
US11143810B2 (en) * 2017-04-04 2021-10-12 Leia Inc. Unilateral backlight, multiview display, and method employing slanted diffraction gratings
JP2022530185A (ja) * 2019-04-03 2022-06-28 カール ツァイス イエナ ゲゼルシャフト ミット ベシュレンクテル ハフツング 光導波路を用いて配光を生成する装置
US12076572B2 (en) 2019-04-03 2024-09-03 Carl Zeiss Ag Device for supplying energy to an active eye implant

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