WO2018220978A1 - 光学部材、発光装置、表示装置および照明装置 - Google Patents
光学部材、発光装置、表示装置および照明装置 Download PDFInfo
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- WO2018220978A1 WO2018220978A1 PCT/JP2018/013135 JP2018013135W WO2018220978A1 WO 2018220978 A1 WO2018220978 A1 WO 2018220978A1 JP 2018013135 W JP2018013135 W JP 2018013135W WO 2018220978 A1 WO2018220978 A1 WO 2018220978A1
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- axial direction
- light
- optical sheet
- transparent optical
- region
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S6/00—Lighting devices intended to be free-standing
- F21S6/005—Lighting devices intended to be free-standing with a lamp housing maintained at a distance from the floor or ground via a support, e.g. standing lamp for ambient lighting
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0273—Diffusing elements; Afocal elements characterized by the use
- G02B5/0284—Diffusing elements; Afocal elements characterized by the use used in reflection
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
- F21S8/04—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/008—Combination of two or more successive refractors along an optical axis
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/02—Refractors for light sources of prismatic shape
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
- G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
- G02B19/0028—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed refractive and reflective surfaces, e.g. non-imaging catadioptric systems
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
- G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
- G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/04—Prisms
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/04—Prisms
- G02B5/045—Prism arrays
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133504—Diffusing, scattering, diffracting elements
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
- G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
Definitions
- the present disclosure relates to an optical member that performs light distribution adjustment of incident light, and a light emitting device, a display device, and a lighting device including the optical member.
- Non-Patent Document 1 proposes various techniques that adjust the light distribution characteristics of transmitted light when transmitting incident light.
- an optical member that has a simple configuration and can obtain desired light distribution characteristics, and a light emitting device, a display device, and an illumination device including the optical member.
- An optical member overlaps with a first transparent optical sheet spreading along a first surface orthogonal to the first axial direction, and the first optical sheet in the first axial direction. And a second transparent optical sheet extending along the first surface.
- the first incident light traveling along the first axial direction is refracted in a first direction along a second axial direction parallel to the first surface.
- emits light contains the structure arrange
- a third incident light traveling along the first axial direction is refracted in a third direction along a third axial direction parallel to the first surface.
- emits light contains the structure arrange
- the angle formed by the third axial direction with respect to the second axial direction is not less than 0 ° and less than 45 °.
- the light condensing performance in the first axial direction is improved, for example, with a simple configuration.
- optical member as one embodiment of the present disclosure, desired light distribution characteristics can be obtained while having a simple configuration. Therefore, according to the display device including this optical member, for example, excellent viewing angle characteristics can be realized. Moreover, according to the illuminating device provided with this optical member, adjustment of the directivity of illumination light, such as relieving the bias of illumination light depending on the light distribution direction, can be realized. In addition, the effect of this indication is not limited to this, Any effect described below may be sufficient.
- FIG. 2 is a characteristic diagram showing a light intensity distribution of light emitted from the optical member shown in FIG.
- FIG. 2 is a characteristic diagram illustrating a relationship between an incident angle and an emission angle in the optical member illustrated in FIG. 1 (entire).
- FIG. 10 is another characteristic diagram showing the relationship between the incident angle and the exit angle in the optical member shown in FIG. 1 (entire).
- FIG. 10 is another characteristic diagram showing the relationship between the incident angle and the exit angle in the optical member shown in FIG. 1 (entire).
- FIG. 10 is another characteristic diagram showing the relationship between the incident angle and the exit angle in the optical member shown in FIG. 1 (entire).
- emitted from the light-emitting device shown in FIG. 14 is a perspective view illustrating an appearance of a display device according to a second embodiment of the present disclosure.
- FIG. FIG. 14 is an exploded perspective view of the main body shown in FIG. 13.
- FIG. 15 is an exploded perspective view illustrating the panel module illustrated in FIG. 14. It is a perspective view showing the external appearance of the tablet-type terminal device carrying the display apparatus of this indication.
- First embodiment (light emitting device)
- the example of the light-emitting device provided with the optical member which has two transparent optical sheets by which the uneven
- Second Embodiment (Liquid Crystal Display Device) An example of a liquid crystal display device including a light emitting device. 3.
- Application example of display device 4.
- Application example of lighting device Other variations
- FIG. 1 is a perspective view illustrating an overall configuration example of a light emitting device 100 according to the first embodiment of the present disclosure.
- the light emitting device 100 is used, for example, as a backlight that illuminates a transmissive liquid crystal panel from behind, or as an illumination device in a room or the like.
- the light emitting device 100 includes, for example, a light source 1 and an optical member 2.
- the light source 1 includes, for example, a substrate 1A and a plurality of light emitting units 1B arranged in a matrix on the substrate 1A.
- the optical member 2 includes an optical sheet 10 disposed in common so as to face the plurality of light emitting units 1 ⁇ / b> B, and an optical sheet 20 provided on the opposite side of the light source 1 when viewed from the optical sheet 10.
- 1 illustrates an example in which a plurality of light emitting units 1B are arranged along both the X-axis direction and the Y-axis direction orthogonal to each other on the substrate 1A, but the present disclosure is limited to this. It is not a thing. Further, another optical sheet or the like may be provided between the light emitting unit 1B and the optical member 2.
- the distance direction between the light source 1 and the optical member 2 is the Z-axis direction (front-rear direction or thickness direction), and the vertical direction on the main surface (widest surface) of the substrate 1A and the optical sheets 10 and 20 is X.
- the axial direction and the left-right direction are defined as the Y-axis direction.
- the Z-axis direction is a specific example corresponding to the “first axial direction” of the present disclosure
- the X-axis direction is a specific example corresponding to the “second axial direction” of the present disclosure
- An XY plane orthogonal to the Z-axis direction is a specific example corresponding to the “first surface” of the present disclosure.
- the light emitting unit 1B has a light emitting element constituted by, for example, an LED (Light Emitting Diode). Further, it is preferable that the light emitted from the light emitting unit 1B is distributed according to the Lambert law by interposing another optical sheet between the light emitting unit 1B and the optical member 2.
- the optical member 2 includes the optical sheet 10 and the optical sheet 20 that are arranged so as to overlap each other in the Z-axis direction and spread along the XY plane.
- the optical sheet 10 and the optical sheet 20 are both called prism sheets having a thickness in the Z-axis direction, and are made of a transparent material such as glass or a thermoplastic resin having a relatively high refractive index.
- the optical sheet 10 has a surface 10S1 opposite to the optical sheet 20, that is, a surface 10S1 facing the light emitting units 1B of the light source 1, and a surface 10S2 opposite to the surface 10S1 and facing the optical sheet 20.
- the optical sheet 10 is configured such that light from the light emitting unit 1B enters the surface 10S1 and then exits from the surface 10S2.
- the optical sheet 20 has a surface 20S1 facing the surface 10S2 of the optical sheet 10 and a surface 20S2 provided on the opposite side of the surface 20S1.
- the optical sheet 20 is configured such that light transmitted through the optical sheet 10 enters the surface 20S1, and then exits from the surface 20S2.
- the optical sheet 10 is a specific example corresponding to the “first transparent optical sheet” of the present disclosure
- the optical sheet 20 is a specific example corresponding to the “second transparent optical sheet” of the present disclosure.
- the surface 10S1 is a specific example corresponding to the “first light incident surface” of the present disclosure
- the surface 20S1 is a specific example corresponding to the “second light incident surface” of the present disclosure.
- FIG. 2 is an enlarged cross-sectional view of a part of the optical member 2 of the light emitting device 100, and shows a cross-section in the direction of the arrow along the line II-II shown in FIG.
- the optical sheet 10 includes a structure in which the region portions 11 and the region portions 12 are alternately arranged in the X-axis direction.
- the surface 10S1 is a flat surface parallel to the XY plane, while the surface 10S2 has a plurality of protrusions T1 arranged along the X-axis direction.
- Each protrusion T1 is, for example, a triangular prism-shaped portion extending in the Y-axis direction as a height direction, and includes a vertex P1 where the slope S1 and the slope S2 are in contact with each other so as to form an apex angle V1.
- the slope S1 occupies the region portion 11, and the slope S2 occupies the region portion 12.
- the optical sheet 20 includes a structure in which the region portions 21 and the region portions 22 are alternately arranged in the X-axis direction.
- the surface 20S1 is a flat surface parallel to the XY plane, and the surface 20S2 has a plurality of protrusions T2 arranged along the X-axis direction.
- Each protrusion T2 is a triangular prism-shaped portion extending in the Y-axis direction as a height direction, and includes a vertex P2 where the slope S3 and the slope S4 are in contact with each other so as to form an apex angle V2.
- the slope S3 occupies the region portion 21 and the slope S4 occupies the region portion 22.
- the apex angle V1 is preferably larger than the apex angle V2.
- the apex angle V1 is preferably 90 ° or more and 130 ° or less, and the apex angle V2 is preferably 90 ° or more and 95 ° or less.
- the plurality of region portions 11 all have substantially the same width W11 in the X-axis direction, and the plurality of region portions 12 all have substantially the same width W2 in the X-axis direction.
- the plurality of region portions 11 and the plurality of region portions 12 are preferably arranged at a constant pitch (width W1 + width W2) in the X-axis direction.
- the plurality of region portions 21 all have substantially the same width W3 in the X-axis direction
- the plurality of region portions 22 all have substantially the same width W4 in the X-axis direction. Good.
- the plurality of region portions 21 and the plurality of region portions 22 are preferably arranged at a constant pitch (width W3 + width W4) in the X-axis direction.
- 2A illustrates the case where the position of the region portion 11 in the X-axis direction matches the position of the region portion 21 in the X-axis direction, but the present disclosure is not limited to this.
- the case where the position of the region portion 12 in the X-axis direction matches the position of the region portion 22 in the X-axis direction is illustrated, but the present disclosure is not limited to this.
- the width W1 and the width W2 may be the same or different.
- the width W3 and the width W4 may be the same or different.
- the incident light L11A traveling along the Z-axis direction when the incident light L11A traveling along the Z-axis direction is incident from the surface 10S1, the emission light L11B refracted in the + X direction along the X-axis direction is out of the surface 10S2. Injected from the slope S1.
- the emitted light L12B refracted in the ⁇ X direction is emitted from the inclined surface S2 of the surface 10S2. It is injected.
- the incident light L11A and the incident light L12A are specific examples corresponding to the “first incident light” and the “second incident light” of the present disclosure, respectively.
- the incident light L21A traveling along the Z-axis direction when the incident light L21A traveling along the Z-axis direction is incident from the surface 20S1, the exit light L21B refracted in the + X direction along the X-axis direction is the surface 20S2.
- the emitted light L22B refracted in the ⁇ X direction is emitted from the inclined surface S4 of the surface 20S2. It is injected.
- the incident light L21A and the incident light L22A are specific examples corresponding to the “third incident light” and the “fourth incident light” of the present disclosure, respectively.
- the light emitting element of the light emitting unit 1B is a point light source
- the light source light emitted from the light emitting element of the light emitting unit 1B spreads in all directions of 360 °.
- the light source light directly enters the optical member 2 as it is, or passes through another optical sheet and then enters the optical member 2.
- the light incident on the optical member 2 sequentially passes through the optical sheet 10 and the optical sheet 20, then exits from the surface 20 ⁇ / b> S ⁇ b> 2 of the optical sheet 20, and is observed as light emission on the side opposite to the light source 1 when viewed from the optical member 2.
- the optical sheet 10 and the optical sheet 20 that are prism sheets that refract incident light and emit in the XZ plane are arranged so as to overlap in the Z-axis direction. For this reason, more components of the light source light emitted from the light source 1 can be condensed in the front direction (+ Z direction).
- FIG. 3A schematically shows a path of light source light when only the optical sheet 20 is used as a reference example.
- the light source light ⁇ 1> from the light source 1 has a light distribution angle distribution according to the Lambert rule, for example, as shown in FIG. 3B.
- FIG. 3B is a characteristic diagram schematically showing the relationship between the light distribution angle [deg] and the light intensity [ ⁇ ] of each light beam. For example, when the light source light ⁇ 1> is incident on the surface 20S1 and then totally reflected on the slope S3 or the slope S4, the light source light ⁇ 1> may return to the light source 1 side as return light ⁇ 2>.
- the return light ⁇ 2> is reflected and diffused by the substrate 1A of the light source 1 and the like, and becomes recycled light ⁇ 3> again and travels toward the optical member 2.
- the recycled light ⁇ 3> also has a light distribution angle distribution according to Lambert's law, similar to the light source light ⁇ 1>, but its intensity is smaller than the intensity of the light source light ⁇ 1>.
- a part of the light source light ⁇ 1> is directly emitted light ⁇ 4> that is directly transmitted through the slope S3 and the slope S4 without being totally reflected on the slope S3 and the slope S4.
- the return light ⁇ 3> finally becomes a component that is transmitted through the slope S3 and the slope S4 without being totally reflected on the slope S3 and the slope S4.
- the direct emission light ⁇ 4> and the return light ⁇ 3> contribute to the light emission performance of the light emitting device 100 as the emission light ⁇ 4A>.
- FIG. 3B also shows the relationship between the light distribution angle and the light intensity for the outgoing light ⁇ 4A>.
- FIG. 3C shows the relationship between the light distribution angle and the light intensity of each of the return light ⁇ 2>, the recycled light ⁇ 3>, and the direct emission light ⁇ 4>.
- a part of the light source light ⁇ 1> does not contribute to light emission in the + Z direction, for example, after being totally reflected at the slope S3 and then transmitted through the slope S4 and not in the + Z direction but in the + X direction.
- Lost light ⁇ 6> From the comparison between the light source light ⁇ 1> shown in FIG. 3B and the outgoing light ⁇ 4> shown in FIG. 3C, the component light exceeding the light distribution angle of 45 ° in the light source light ⁇ 1> is lost. I understand that.
- the optical sheet 10 is inserted between the optical sheet 20 and the light source 1, for example, as schematically shown in FIG. Loss of> can be reduced, and emission light ⁇ 5> having higher intensity can be obtained while narrowing the light distribution angle.
- FIG. 4 schematically shows the path of light transmitted through the optical member 2.
- nA is the refractive index of the medium (for example, air) between the light source 1 and the optical sheet 10
- nB is the refractive index of the medium (for example, air) between the optical sheet 10 and the optical sheet 20.
- NC is the refractive index of the medium (for example, air) between the optical sheet 20 and the observer.
- N1 is the refractive index of the optical sheet 10
- n2 is the refractive index of the optical sheet 20.
- ⁇ 1 and ⁇ 2 are incident angles of light
- ⁇ 1, ⁇ 2A, and ⁇ 2B are output angles of light.
- ⁇ 2 and ⁇ 1 are equal.
- a transmission mode I and a transmission mode II exist in the path of light that passes through the optical member 2.
- the transmission mode I for example, light transmitted through the slope S2 travels so as to pass through the slope S3.
- the transmission mode II for example, light transmitted through the slope S2 travels so as to pass through the slope S4.
- the emission angle ⁇ 1 in the optical sheet 10 is given by the following equation (1).
- ⁇ 1 arcsin (n1 / nb * sin ( ⁇ / 180 * ((arcsin (na / n1 * sin ( ⁇ 1 * ⁇ / 180))) * 180 / ⁇ (90 ⁇ 1 / 2)))) * 180 / ⁇ + (90 ⁇ 1 / 2) (1)
- ⁇ 2A arcsin (n2 / nc * sin ( ⁇ / 180 * ((arcsin (nb / n2 * sin ( ⁇ 2 * ⁇ / 180))) * 180 / ⁇ + (90 ⁇ 2 / 2)))) * 180 / ⁇ -(90- ⁇ 2 / 2) (2)
- the emission angle ⁇ 2B of the optical sheet 20 in the transmission mode II is given by the following equation (3).
- ⁇ 2B arcsin (n2 / nc * sin ( ⁇ / 180 * ((arcsin (nb / n2 * sin ( ⁇ 2 * ⁇ / 180))) * 180 / ⁇ (90 ⁇ 2 / 2)))) * 180 / ⁇ + (90 ⁇ 2 / 2) (3)
- FIG. 5 schematically shows a path of light source light when only the optical sheet 20 is used without using the optical sheet 10 as a reference example, and the incident angle [deg] of light incident on the optical sheet 20 and the optical The relationship with the emission angle [deg] of the light emitted from the sheet 20 is shown.
- the angle of inclination in the + X direction with the front direction (+ Z direction) as the reference (0 °) is positive, and the angle of inclination in the ⁇ X direction is negative, and the incident angle and the output angle are represented.
- FIG. 5 at an incident angle near ⁇ 90 ° to + 5 °, total reflection occurs on the slope S3 or slope S4, and no outgoing light appears.
- FIG. 6 schematically shows the path of the light source light in the transmission mode I described in FIG. 4 in the case where the optical member 2 in the present embodiment is used, and the incident angle of light incident on the optical sheet 10 [ deg] and the emission angle [deg] of the light emitted from the optical sheet 20 are shown.
- the apex angle V1 is 120 °
- the apex angle V2 is 90 °
- the refractive indexes n1 and n2 of the optical sheet 10 and the optical sheet 20 are both 1.48.
- FIG. 6 at an incident angle of ⁇ 90 ° to less than ⁇ 18 °, total reflection occurs on the inclined surface S1 or inclined surface S2 of the optical sheet 10, and no outgoing light appears.
- FIG. 7 schematically illustrates the path of the light source light in the transmission mode II described with reference to FIG. 4 in the case where the optical member 2 in the present embodiment is used, and the incident angle of the light incident on the optical sheet 10 [ deg] and the emission angle [deg] of the light emitted from the optical sheet 20 are shown. Also in this case, the apex angle V1 was 120 °, the apex angle V2 was 90 °, and the refractive indexes n1 and n2 of the optical sheet 10 and the optical sheet 20 were both 1.48. As shown in FIG.
- FIG. 8 shows the curve in the transmission mode I shown in FIG. 6 and the curve in the transmission mode II shown in FIG.
- the emitted light in the range of ⁇ 40 ° to + 25 ° is emitted. appear. That is, compared with the case of FIG. 5, light with a wider incident angle can be emitted in the front direction as outgoing light.
- the emitted light shown in FIGS. 6 and 7 corresponds to the emitted light ⁇ 5> described in FIG. 3D.
- incident light having an incident angle near 0 ° appears as outgoing light having a slightly inclined outgoing angle.
- incident light having an incident angle near + 11 ° to + 18 ° is not transmitted in either the transmission mode I or the transmission mode II. Therefore, if these can be improved, the front luminance can be further improved and the incident light utilization efficiency can be further improved.
- FIG. 9 shows an incident angle [deg] of light incident on the optical sheet 10 and an outgoing angle [deg] of light emitted from the optical sheet 20 when the apex angle V1 is 110 ° and the apex angle V2 is 95 °. This represents the relationship.
- the outgoing angle when the incident angle is 0 °, the outgoing angle is 0 °, and when the incident angle is in the range of ⁇ 11 ° to + 90 °, the outgoing angle is ⁇ 40 ° to + 25 °. A range of outgoing light appears.
- FIG. 10 shows the incident angle [deg] of light incident on the optical sheet 10 when the apex angle V1 is changed in the range of 90 ° to 120 ° and the apex angle V2 is fixed at 90 °, and the light is emitted from the optical sheet 20.
- FIG. 11 shows an incident angle [deg] of light incident on the optical sheet 10 when the apex angle V1 is fixed at 120 ° and the apex angle V2 is changed in the range of 90 ° to 95 °, and the light is emitted from the optical sheet 20.
- FIG. 12 is a characteristic diagram showing the relationship between the emission angle and the light intensity.
- a curve C12A represents the intensity distribution of the light source light emitted from the light source 1.
- a curve C12B represents the light intensity distribution obtained when the light source light is transmitted only through the optical sheet 20 (corresponding to FIG. 5).
- Curves C12C and C12D represent light intensity distributions obtained when the light source light is sequentially transmitted through the optical sheet 10 and the optical sheet 20 (corresponding to FIGS. 8 and 9, respectively). As shown in FIG. 12, it can be seen that in the curves C12C and C12D, the light intensity is improved while the spread of the emission angle is suppressed as compared with the curves C12A and C12B.
- the optical member 2 in which the optical sheet 10 and the optical sheet 20 are laminated is provided, desired light distribution characteristics can be obtained with a simple configuration. That is, for example, incident light, which is scattered light, can be distributed in the front direction to improve front luminance and use efficiency of incident light.
- FIG. 13 illustrates an appearance of the display device 101 according to the third embodiment of the present technology.
- the display device 101 includes a light emitting device 100 and is used as, for example, a thin television device, and has a configuration in which a flat main body 102 for image display is supported by a stand 103.
- the display device 101 is used as a stationary type with the stand 103 attached to the main body 102 and placed on a horizontal surface such as a floor, a shelf, or a stand, but the stand 103 is removed from the main body 102. It can also be used as a wall-hanging type.
- FIG. 14 is an exploded view of the main body 102 shown in FIG.
- the main body 102 has, for example, a front exterior member (bezel) 111, a panel module 112, and a rear exterior member (rear cover) 113 in this order from the front side (viewer side).
- the front exterior member 111 is a frame-shaped member that covers the peripheral edge of the front surface of the panel module 112, and a pair of speakers 114 are disposed below the front exterior member 111.
- the panel module 112 is fixed to the front exterior member 111, and a power supply board 115 and a signal board 116 are mounted on the rear surface thereof, and a mounting bracket 117 is fixed.
- the mounting bracket 117 is for mounting a wall-mounted bracket, mounting a board, etc., and mounting the stand 103.
- the rear exterior member 113 covers the back and side surfaces of the panel module 112.
- FIG. 15 is an exploded view of the panel module 112 shown in FIG.
- the panel module 112 includes, for example, an optical member 3 as a second optical member, a front housing (top chassis) 121, a liquid crystal panel 122, a frame-shaped member (middle chassis) 123, from the front side (viewer side).
- An optical member 2 as a first optical member, a light source 1, a rear housing (back chassis) 124, and a timing controller board 127 are provided in this order.
- a light emitting device 100 is configured by the optical member 2 and the light source 1.
- the optical member 3 is provided on the side opposite to the optical member 2 when viewed from the liquid crystal panel 122, and the image light incident from the liquid crystal panel 122 is emitted from the liquid crystal panel 122 in an output angle range wider than the incident angle range of the image light.
- the optical member 3 preferably has a light intensity light distribution characteristic approximate to a light intensity light distribution characteristic in accordance with, for example, Lambert's law.
- the front housing 121 is a frame-shaped metal part that covers the front peripheral edge of the liquid crystal panel 122.
- the liquid crystal panel 122 includes, for example, a liquid crystal cell 122A, a source substrate 122B, and a flexible substrate 122C such as a COF (Chip On On Film) that connects them.
- the frame-shaped member 123 is a frame-shaped resin component that holds the liquid crystal panel 122.
- the rear housing 124 is a metal part made of iron (Fe) or the like that houses the liquid crystal panel 122, the frame-shaped member 123, and the light emitting device 100.
- the timing controller board 127 is also mounted on the back surface of the rear housing 124.
- the light from the light emitting device 100 is selectively transmitted by the liquid crystal panel 122, thereby displaying an image.
- the light emitting device 100 having excellent light distribution characteristics and improved light emission efficiency is provided, an improvement in display quality of the display device 101 can be expected.
- display device 101 As described above to an electronic device will be described.
- the electronic device include a television device, a digital camera, a notebook personal computer, a mobile terminal device such as a mobile phone, or a video camera.
- the display device can be applied to electronic devices in various fields that display a video signal input from the outside or a video signal generated inside as an image or video.
- FIG. 16A shows the appearance of a tablet terminal device to which the display device 101 of the above embodiment is applied.
- FIG. 16B illustrates the appearance of another tablet terminal device to which the display device 101 of the above embodiment is applied.
- Each of these tablet-type terminal devices has, for example, a display unit 210 and a non-display unit 220, and the display unit 210 is configured by the display device 101 of the above embodiment.
- FIGS. 17 and 18 illustrate the appearance of a tabletop lighting device to which the light emitting device 100 or the like of the above embodiment is applied.
- the lighting device is a lighting device 843 attached to a support column 842 provided on a base 841.
- the lighting unit 843 includes the light emitting device 100 and the like.
- the illumination unit 843 can have an arbitrary shape such as a cylindrical shape illustrated in FIG. 17 or a curved surface shape illustrated in FIG. 18 by forming the substrate 1A, the optical member 2, and the like into a curved shape.
- FIG. 19 shows an appearance of an indoor lighting device to which the light emitting device 100 of the above embodiment is applied.
- This illuminating device includes an illuminating unit 844 including the light emitting device 100 and the like.
- the illumination units 844 are arranged at an appropriate number and interval on the ceiling 850A of the building. Note that the lighting unit 844 can be installed not only in the ceiling 850A but also in an arbitrary place such as a wall 850B or a floor (not shown) depending on the application.
- illumination is performed by light from the light emitting device 100 or the like.
- the illumination quality is improved because the light emitting device 100 is provided which has excellent luminous efficiency and obtains desired light distribution characteristics.
- the relative angle may be 0 ° or more and less than 45 °.
- incident light is refracted by providing the projection T1 on the surface 10S2 of the optical sheet 10 and providing the projection T2 on the surface 20S2 of the optical sheet 20.
- incident light is refracted by providing the projection T1 on the surface 10S2 of the optical sheet 10 and providing the projection T2 on the surface 20S2 of the optical sheet 20.
- a first transparent optical sheet using a first diffractive lens having a first dot pattern formed in the first region portion and a second dot pattern formed in the second region portion
- a second diffractive lens having a third dot pattern formed in the third region portion and a fourth dot pattern formed in the fourth region portion is used. May be. That is, as long as it causes an optical action, it is not limited to those provided with physical undulations.
- the first apex angle (vertical angle V1) is 90 ° or more and 130 ° or less
- the second apex angle (vertical angle V2) is 90 ° or more and 95 ° or less.
- the first apex angle and the second apex angle are not limited thereto.
- the first apex angle may be about 175 ° to 160 °.
- this technique can take the following structures. (1) A first transparent optical sheet extending along a first surface perpendicular to the first axial direction; A second transparent optical sheet disposed so as to overlap the first transparent optical sheet in the first axial direction and extending along the first surface; In the first transparent optical sheet, the first incident light traveling along the first axial direction is refracted in a first direction along a second axial direction parallel to the first surface. The first region portion that emits the first emitted light and the second incident light that travels along the first axial direction are refracted in a second direction opposite to the first direction.
- second region portions that emit the second emitted light include a structure in which the second region portions are alternately arranged in the second axial direction,
- the third incident light traveling along the first axial direction is refracted in a third direction along a third axial direction parallel to the first surface.
- the third region portion that emits the third emitted light and the fourth incident light that travels along the first axial direction are refracted in a fourth direction opposite to the third direction.
- the fourth region portion that emits the fourth emitted light includes a structure alternately arranged in the third axial direction, An angle formed by the third axial direction with respect to the second axial direction is not less than 0 ° and less than 45 °.
- the said angle is larger than 0 degree
- the plurality of first region portions all have substantially the same first width in the second axial direction
- the plurality of second region portions all have substantially the same second width in the second axial direction
- the plurality of first region portions and the plurality of second region portions are arranged at a first pitch in the second axial direction
- the plurality of third region portions all have substantially the same third width in the second axial direction
- a plurality of the fourth region portions all have substantially the same fourth width in the second axial direction
- the optical member according to (1) or (2), wherein the plurality of third region portions and the plurality of fourth region portions are arranged at a second pitch in the second axial direction.
- the first transparent optical sheet has a first slope occupying the first region portion and a second slope occupying the second region portion on the side facing the second transparent optical sheet.
- the second transparent optical sheet has a second slope occupying the third region portion and a fourth slope occupying the fourth region portion on the opposite side of the first transparent optical sheet.
- the first apex angle is not less than 90 ° and not more than 130 °; The optical member according to (4) or (5), wherein the second apex angle is not less than 90 ° and not more than 95 °.
- the first transparent optical sheet has a first light incident surface on the side opposite to the second transparent optical sheet, The optical member according to any one of (4) to (6), wherein the second transparent optical sheet has a second light incident surface on a side facing the first transparent optical sheet.
- the first transparent optical sheet is a first diffractive lens having a first dot pattern formed in the first region portion and a second dot pattern formed in the second region portion.
- the second transparent optical sheet is a second diffractive lens having a third dot pattern formed in the third region portion and a fourth dot pattern formed in the fourth region portion.
- the optical member according to any one of (1) to (3).
- (9) A light source and an optical member;
- the optical member is A first transparent optical sheet extending along a first surface perpendicular to the first axial direction;
- a second transparent optical sheet disposed so as to overlap the first transparent optical sheet in the first axial direction and extending along the first surface;
- the first transparent optical sheet has a first direction along a second axial direction in which the first incident light from the light source traveling along the first axial direction is parallel to the first surface.
- a first region portion that emits first emitted light that is refracted into the second direction, and second incident light from the light source that travels along the first axial direction is opposite to the first direction.
- a second region portion that emits second emitted light that is refracted in the second direction includes a structure in which the second region portions are alternately arranged in the second axial direction;
- the second transparent optical sheet has a third direction along a third axial direction in which the third incident light from the light source traveling along the first axial direction is parallel to the first surface.
- a third region that emits a third emission light that is refracted into the fourth direction, and a fourth incident light from the light source that travels along the first axial direction is opposite to the third direction.
- a fourth region portion that emits the fourth emission light that is refracted in the fourth direction includes a structure in which the fourth region portions are alternately arranged in the third axial direction; An angle formed by the third axial direction with respect to the second axial direction is not less than 0 ° and less than 45 °.
- the first optical member includes: A first transparent optical sheet extending along a first surface perpendicular to the first axial direction; A second transparent optical sheet disposed so as to overlap the first transparent optical sheet in the first axial direction and extending along the first surface;
- the first transparent optical sheet has a first direction along a second axial direction in which the first incident light from the light source traveling along the first axial direction is parallel to the first surface.
- a first region portion that emits first emitted light that is refracted toward the liquid crystal panel, and second incident light from the light source that travels along the first axial direction is the first region.
- the second transparent optical sheet has a third direction along a third axial direction in which the third incident light from the light source traveling along the first axial direction is parallel to the first surface.
- a third region that emits the third emitted light that is refracted toward the liquid crystal panel, and a fourth incident light from the light source that travels along the first axial direction is the third region.
- fourth region portions for emitting the fourth emission light refracted in the fourth direction opposite to the direction toward the liquid crystal panel are alternately arranged in the third axial direction.
- An angle formed by the third axial direction with respect to the second axial direction is not less than 0 ° and less than 45 °.
- a second optical member on the opposite side of the first optical member when viewed from the liquid crystal panel The display device according to (10), wherein the second optical member emits image light incident from the liquid crystal panel to an opposite side of the liquid crystal panel in an emission angle range wider than an incident angle range of the image light.
- a light emitting device having a light source and an optical member;
- the optical member is A first transparent optical sheet extending along a first surface perpendicular to the first axial direction;
- a second transparent optical sheet disposed so as to overlap the first transparent optical sheet in the first axial direction and extending along the first surface;
- the first transparent optical sheet has a first direction along a second axial direction in which the first incident light from the light source traveling along the first axial direction is parallel to the first surface.
- a first region portion that emits first emitted light that is refracted into the second direction, and second incident light from the light source that travels along the first axial direction is opposite to the first direction.
- a second region portion that emits second emitted light that is refracted in the second direction includes a structure in which the second region portions are alternately arranged in the second axial direction;
- the second transparent optical sheet has a third direction along a third axial direction in which the third incident light from the light source traveling along the first axial direction is parallel to the first surface.
- a third region that emits a third emission light that is refracted into the fourth direction, and a fourth incident light from the light source that travels along the first axial direction is opposite to the third direction.
- a fourth region portion that emits the fourth emission light that is refracted in the fourth direction includes a structure in which the fourth region portions are alternately arranged in the third axial direction; An angle formed by the third axial direction with respect to the second axial direction is not less than 0 ° and less than 45 °.
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Abstract
Description
なお、本開示の効果はこれに限定されるものではなく、以下に記載のいずれの効果であってもよい。
1.第1の実施の形態(発光装置)
射出面に凹凸構造がそれぞれ設けられた2つの透明光学シートを有する光学部材を備えた発光装置の例。
2.第2の実施の形態(液晶表示装置)
発光装置を備えた液晶表示装置の例。
3.表示装置の適用例
4.照明装置の適用例
5.その他の変形例
[1.1 発光装置100の構成]
図1は、本開示の第1の実施の形態としての発光装置100の全体構成例を表した斜視図である。この発光装置100は、例えば、透過型の液晶パネルを背後から照明するバックライトとして、あるいは室内等において照明装置として用いられるものである。発光装置100は、図1に示したように、例えば光源1と光学部材2とを有する。光源1は、例えば基板1Aと、基板1Aの上にマトリックス状に配列された複数の発光部1Bとを有する。光学部材2は、それら複数の発光部1Bと対向するように共通に配置された光学シート10と、その光学シート10から見て光源1と反対側に設けられた光学シート20とを有する。なお、図1では、基板1A上において複数の発光部1Bが互いに直交するX軸方向およびY軸方向の双方に沿って配列されている例を示しているが、本開示はこれに限定されるものではない。また、発光部1Bと光学部材2との間に他の光学シートなどを設けるようにしてもよい。
先に述べたように、光学部材2は、Z軸方向において互いに重なり合うように配置され、それぞれXY面に沿って広がる光学シート10および光学シート20を有している。光学シート10および光学シート20は、いずれもZ軸方向に厚みを有するプリズムシートと呼ばれるものであり、例えばガラスや比較的高い屈折率を有する熱可塑性樹脂などの透明体からなる。光学シート10は、光学シート20と反対側、すなわち光源1の複数の発光部1Bと向き合う面10S1と、面10S1と反対側であって光学シート20と向き合う面10S2とを有している。光学シート10は、発光部1Bからの光が面10S1から入射したのち、面10S2から出射されるようになっている。光学シート20は、光学シート10の面10S2と向き合う面20S1と、面20S1と反対側に設けられた面20S2とを有している。光学シート20は、光学シート10を透過した光が面20S1から入射したのち、面20S2から出射されるようになっている。
ここで、光学シート10が本開示の「第1の透明光学シート」に対応する一具体例であり、光学シート20が本開示の「第2の透明光学シート」に対応する一具体例である。また、面10S1が本開示の「第1の光入射面」に対応する一具体例であり、面20S1が本開示の「第2の光入射面」に対応する一具体例である。
であり、図1に示したII-II線に沿った矢視方向の断面を表している。
ここで、入射光L11Aおよび入射光L12Aは、それぞれ、本開示の「第1の入射光」および「第2の入射光」に対応する一具体例である。
ここで、入射光L21Aおよび入射光L22Aは、それぞれ、本開示の「第3の入射光」および「第4の入射光」に対応する一具体例である。
発光装置100では、発光部1Bの発光素子は点光源であるので、発光部1Bの発光素子から発せられた光源光は360°全方向に広がることとなる。その光源光はそのまま光学部材2へ直接入射し、あるいは他の光学シートなどを透過したのち、光学部材2へ入射することとなる。光学部材2へ入射した光は光学シート10と光学シート20とを順次透過したのち、光学シート20の面20S2から射出され、光学部材2から見て光源1と反対側において発光として観測される。
面20S1から入射したのち斜面S3または斜面S4において全反射すると、戻り光<2>となって光源1側へ戻る場合がある。その戻り光<2>は、光源1の基板1Aなどにおいて反射および拡散され、再度リサイクル光<3>となって光学部材2へ向かうこととなる。このリサイクル光<3>もまた、光源光<1>と同様にランバート則に従う配光角度分布を有するものであるが、その強度は光源光<1>の強度よりも小さい。光源光<1>の一部は、斜面S3および斜面S4において全反射せずに斜面S3および斜面S4を直接透過する直接出射光<4>となる。戻り光<3>は、最終的には、斜面S3および斜面S4において全反射せずに斜面S3および斜面S4を透過する成分となる。直接出射光<4>および戻り光<3>は、出射光<4A>として発光装置100の発光性能に寄与することとなる。図3Bに、出射光<4A>についての配光角度と光強度との関係を併せて示す。また図3Cに、戻り光<2>、リサイクル光<3>および直接出射光<4>の各々の配光角度と光強度との関係を表す。また、光源光<1>の一部は、例えば斜面S3において全反射したのち、斜面S4を透過して+Z方向へ進行せずに+X方向へ進行するなどして+Z方向への発光に寄与しない損失光<6>となってしまう。図3Bに示した光源光<1>と図3Cに示した出射光<4>との比較から、光源光<1>のうちの配光角度45°を超える成分光については損失となっていることがわかる。
図13は、本技術の第3の実施の形態に係る表示装置101の外観を表したものである。この表示装置101は、発光装置100を備え、例えば薄型テレビジョン装置として用いられるものであり、画像表示のための平板状の本体部102をスタンド103により支持した構成を有している。なお、表示装置101は、スタンド103を本体部102に取付けた状態で、床,棚または台などの水平面に載置して据置型として用いられるが、スタンド103を本体部102から取り外した状態で壁掛型として用いることも可能である。
以下、上記のような表示装置101の電子機器への適用例について説明する。電子機器としては、例えばテレビジョン装置,デジタルカメラ,ノート型パーソナルコンピュータ、携帯電話等の携帯端末装置あるいはビデオカメラ等が挙げられる。言い換えると、上記表示装置は、外部から入力された映像信号あるいは内部で生成した映像信号を、画像あるいは映像として表示するあらゆる分野の電子機器に適用することが可能である。
図17および図18は、上記実施の形態の発光装置100などが適用される卓上用の照明装置の外観を表したものである。この照明装置は、例えば、基台841に設けられた支柱842に、照明部843を取り付けたものであり、この照明部843は、発光装置100などにより構成されている。照明部843は、基板1Aおよび光学部材2などを湾曲形状とすることにより、図17に示した筒状、または図18に示した曲面状など、任意の形状とすることが可能である。
以上、実施の形態および変形例を挙げて本開示を説明したが、本開示は上記実施の形態等に限定されるものではなく、種々の変形が可能である。例えば、上記実施の形態において説明した光学シートの突起部の頂角や屈折率などは、上記したものに限定されるものではない。
(1)
第1の軸方向と直交する第1の面に沿って広がる第1の透明光学シートと、
前記第1の軸方向において前記第1の透明光学シートと重なり合うように配置され、前記第1の面に沿って広がる第2の透明光学シートと
を有し、
前記第1の透明光学シートは、前記第1の軸方向に沿って進行する第1の入射光が前記第1の面に平行な第2の軸方向に沿った第1の方向へ屈折してなる第1の射出光を射出する第1の領域部分と、前記第1の軸方向に沿って進行する第2の入射光が前記第1の方向と反対向きの第2の方向へ屈折してなる第2の射出光を射出する第2の領域部分とが、前記第2の軸方向において交互に配置された構造を含み、
前記第2の透明光学シートは、前記第1の軸方向に沿って進行する第3の入射光が前記第1の面に平行な第3の軸方向に沿った第3の方向へ屈折してなる第3の射出光を射出する第3の領域部分と、前記第1の軸方向に沿って進行する第4の入射光が前記第3の方向と反対向きの第4の方向へ屈折してなる第4の射出光を射出する第4の領域部分とが、前記第3の軸方向において交互に配置された構造を含み、
前記第2の軸方向に対する前記第3の軸方向のなす角度は0°以上45°未満である
光学部材。
(2)
前記角度は0°よりも大きい
上記(1)記載の光学部材。
(3)
複数の前記第1の領域部分は、いずれも、前記第2の軸方向において実質的に同じ第1の幅を有し、
複数の前記第2の領域部分は、いずれも、前記第2の軸方向において実質的に同じ第2の幅を有し、
前記複数の第1の領域部分および前記複数の第2の領域部分は、前記第2の軸方向において第1のピッチで配置され、
複数の前記第3の領域部分は、いずれも、前記第2の軸方向において実質的に同じ第3の幅を有し、
複数の前記第4の領域部分は、いずれも、前記第2の軸方向において実質的に同じ第4の幅を有し、
前記複数の第3の領域部分および前記複数の第4の領域部分は、前記第2の軸方向において第2のピッチで配置されている
上記(1)または(2)記載の光学部材。
(4)
前記第1の透明光学シートは、前記第2の透明光学シートと向き合う側に、前記第1の領域部分を占める第1の斜面と前記第2の領域部分を占める第2の斜面とが第1の頂角をなすように接する第1の頂点を含む第1の突起部を複数有し、
前記第2の透明光学シートは、前記第1の透明光学シートと反対側に、前記第3の領域部分を占める第3の斜面と前記第4の領域部分を占める第4の斜面とが第2の頂角をなすように接する第2の頂点を含む第2の突起部を複数有する
上記(1)から(3)のいずれか1つに記載の光学部材。
(5)
前記第1の頂角は前記第2の頂角よりも大きい
上記(4)記載の光学部材。
(6)
前記第1の頂角は90°以上130°以下であり、
前記第2の頂角は90°以上95°以下である
上記(4)または(5)記載の光学部材。
(7)
前記第1の透明光学シートは、前記第2の透明光学シートと反対側に、第1の光入射面を有し、
前記第2の透明光学シートは、前記第1の透明光学シートと向き合う側に、第2の光入射面を有する
上記(4)から(6)のいずれか1つに記載の光学部材。
(8)
前記第1の透明光学シートは、前記第1の領域部分に形成された第1のドットパターンと、前記第2の領域部分に形成された第2のドットパターンとを有する第1の回折レンズであり、
前記第2の透明光学シートは、前記第3の領域部分に形成された第3のドットパターンと、前記第4の領域部分に形成された第4のドットパターンとを有する第2の回折レンズである
上記(1)から(3)のいずれか1つに記載の光学部材。
(9)
光源と、光学部材とを備え、
前記光学部材は、
第1の軸方向と直交する第1の面に沿って広がる第1の透明光学シートと、
前記第1の軸方向において前記第1の透明光学シートと重なり合うように配置され、前記第1の面に沿って広がる第2の透明光学シートと
を有し、
前記第1の透明光学シートは、前記第1の軸方向に沿って進行する前記光源からの第1の入射光が前記第1の面に平行な第2の軸方向に沿った第1の方向へ屈折してなる第1の射出光を射出する第1の領域部分と、前記第1の軸方向に沿って進行する前記光源からの第2の入射光が前記第1の方向と反対向きの第2の方向へ屈折してなる第2の射出光を射出する第2の領域部分とが、前記第2の軸方向において交互に配置された構造を含み、
前記第2の透明光学シートは、前記第1の軸方向に沿って進行する前記光源からの第3の入射光が前記第1の面に平行な第3の軸方向に沿った第3の方向へ屈折してなる第3の射出光を射出する第3の領域部分と、前記第1の軸方向に沿って進行する前記光源からの第4の入射光が前記第3の方向と反対向きの第4の方向へ屈折してなる第4の射出光を射出する第4の領域部分とが、前記第3の軸方向において交互に配置された構造を含み、
前記第2の軸方向に対する前記第3の軸方向のなす角度は0°以上45°未満である
発光装置。
(10)
光源と、第1の光学部材と、液晶パネルとを順に備え、
前記第1の光学部材は、
第1の軸方向と直交する第1の面に沿って広がる第1の透明光学シートと、
前記第1の軸方向において前記第1の透明光学シートと重なり合うように配置され、前記第1の面に沿って広がる第2の透明光学シートと
を有し、
前記第1の透明光学シートは、前記第1の軸方向に沿って進行する前記光源からの第1の入射光が前記第1の面に平行な第2の軸方向に沿った第1の方向へ屈折してなる第1の射出光を前記液晶パネルへ向けて射出する第1の領域部分と、前記第1の軸方向に沿って進行する前記光源からの第2の入射光が前記第1の方向と反対向きの第2の方向へ屈折してなる第2の射出光を前記液晶パネルへ向けて射出する第2の領域部分とが、前記第2の
軸方向において交互に配置された構造を含み、
前記第2の透明光学シートは、前記第1の軸方向に沿って進行する前記光源からの第3の入射光が前記第1の面に平行な第3の軸方向に沿った第3の方向へ屈折してなる第3の射出光を前記液晶パネルへ向けて射出する第3の領域部分と、前記第1の軸方向に沿って進行する前記光源からの第4の入射光が前記第3の方向と反対向きの第4の方向へ屈折してなる第4の射出光を前記液晶パネルへ向けて射出する第4の領域部分とが、前記第3の軸方向において交互に配置された構造を含み、
前記第2の軸方向に対する前記第3の軸方向のなす角度は0°以上45°未満である
表示装置。
(11)
前記液晶パネルから見て前記第1の光学部材と反対側に第2の光学部材をさらに備え、
前記第2の光学部材は、前記液晶パネルから入射する画像光を、前記画像光の入射角度範囲よりも広い出射角度範囲で前記液晶パネルと反対側に出射する
上記(10)記載の表示装置。
(12)
光源と、光学部材とを有する発光装置を備え、
前記光学部材は、
第1の軸方向と直交する第1の面に沿って広がる第1の透明光学シートと、
前記第1の軸方向において前記第1の透明光学シートと重なり合うように配置され、前記第1の面に沿って広がる第2の透明光学シートと
を有し、
前記第1の透明光学シートは、前記第1の軸方向に沿って進行する前記光源からの第1の入射光が前記第1の面に平行な第2の軸方向に沿った第1の方向へ屈折してなる第1の射出光を射出する第1の領域部分と、前記第1の軸方向に沿って進行する前記光源からの第2の入射光が前記第1の方向と反対向きの第2の方向へ屈折してなる第2の射出光を射出する第2の領域部分とが、前記第2の軸方向において交互に配置された構造を含み、
前記第2の透明光学シートは、前記第1の軸方向に沿って進行する前記光源からの第3の入射光が前記第1の面に平行な第3の軸方向に沿った第3の方向へ屈折してなる第3の射出光を射出する第3の領域部分と、前記第1の軸方向に沿って進行する前記光源からの第4の入射光が前記第3の方向と反対向きの第4の方向へ屈折してなる第4の射出光を射出する第4の領域部分とが、前記第3の軸方向において交互に配置された構造を含み、
前記第2の軸方向に対する前記第3の軸方向のなす角度は0°以上45°未満である
照明装置。
Claims (12)
- 第1の軸方向と直交する第1の面に沿って広がる第1の透明光学シートと、
前記第1の軸方向において前記第1の透明光学シートと重なり合うように配置され、前記第1の面に沿って広がる第2の透明光学シートと
を有し、
前記第1の透明光学シートは、前記第1の軸方向に沿って進行する第1の入射光が前記第1の面に平行な第2の軸方向に沿った第1の方向へ屈折してなる第1の射出光を射出する第1の領域部分と、前記第1の軸方向に沿って進行する第2の入射光が前記第1の方向と反対向きの第2の方向へ屈折してなる第2の射出光を射出する第2の領域部分とが、前記第2の軸方向において交互に配置された構造を含み、
前記第2の透明光学シートは、前記第1の軸方向に沿って進行する第3の入射光が前記第1の面に平行な第3の軸方向に沿った第3の方向へ屈折してなる第3の射出光を射出する第3の領域部分と、前記第1の軸方向に沿って進行する第4の入射光が前記第3の方向と反対向きの第4の方向へ屈折してなる第4の射出光を射出する第4の領域部分とが、前記第3の軸方向において交互に配置された構造を含み、
前記第2の軸方向に対する前記第3の軸方向のなす角度は0°以上45°未満である
光学部材。 - 前記角度は0°よりも大きい
請求項1記載の光学部材。 - 複数の前記第1の領域部分は、いずれも、前記第2の軸方向において実質的に同じ第1の幅を有し、
複数の前記第2の領域部分は、いずれも、前記第2の軸方向において実質的に同じ第2の幅を有し、
前記複数の第1の領域部分および前記複数の第2の領域部分は、前記第2の軸方向において第1のピッチで配置され、
複数の前記第3の領域部分は、いずれも、前記第2の軸方向において実質的に同じ第3の幅を有し、
複数の前記第4の領域部分は、いずれも、前記第2の軸方向において実質的に同じ第4の幅を有し、
前記複数の第3の領域部分および前記複数の第4の領域部分は、前記第2の軸方向において第2のピッチで配置されている
請求項1記載の光学部材。 - 前記第1の透明光学シートは、前記第2の透明光学シートと向き合う側に、前記第1の領域部分を占める第1の斜面と前記第2の領域部分を占める第2の斜面とが第1の頂角をなすように接する第1の頂点を含む第1の突起部を複数有し、
前記第2の透明光学シートは、前記第1の透明光学シートと反対側に、前記第3の領域部分を占める第3の斜面と前記第4の領域部分を占める第4の斜面とが第2の頂角をなすように接する第2の頂点を含む第2の突起部を複数有する
請求項1記載の光学部材。 - 前記第1の頂角は前記第2の頂角よりも大きい
請求項4記載の光学部材。 - 前記第1の頂角は90°以上130°以下であり、
前記第2の頂角は90°以上95°以下である
請求項4記載の光学部材。 - 前記第1の透明光学シートは、前記第2の透明光学シートと反対側に、第1の光入射面を有し、
前記第2の透明光学シートは、前記第1の透明光学シートと向き合う側に、第2の光入射面を有する
請求項4記載の光学部材。 - 前記第1の透明光学シートは、前記第1の領域部分に形成された第1のドットパターンと、前記第2の領域部分に形成された第2のドットパターンとを有する第1の回折レンズであり、
前記第2の透明光学シートは、前記第3の領域部分に形成された第3のドットパターンと、前記第4の領域部分に形成された第4のドットパターンとを有する第2の回折レンズである
請求項1記載の光学部材。 - 光源と、光学部材とを備え、
前記光学部材は、
第1の軸方向と直交する第1の面に沿って広がる第1の透明光学シートと、
前記第1の軸方向において前記第1の透明光学シートと重なり合うように配置され、前記第1の面に沿って広がる第2の透明光学シートと
を有し、
前記第1の透明光学シートは、前記第1の軸方向に沿って進行する前記光源からの第1の入射光が前記第1の面に平行な第2の軸方向に沿った第1の方向へ屈折してなる第1の射出光を射出する第1の領域部分と、前記第1の軸方向に沿って進行する前記光源からの第2の入射光が前記第1の方向と反対向きの第2の方向へ屈折してなる第2の射出光を射出する第2の領域部分とが、前記第2の軸方向において交互に配置された構造を含み、
前記第2の透明光学シートは、前記第1の軸方向に沿って進行する前記光源からの第3の入射光が前記第1の面に平行な第3の軸方向に沿った第3の方向へ屈折してなる第3の射出光を射出する第3の領域部分と、前記第1の軸方向に沿って進行する前記光源からの第4の入射光が前記第3の方向と反対向きの第4の方向へ屈折してなる第4の射出光を射出する第4の領域部分とが、前記第3の軸方向において交互に配置された構造を含み、
前記第2の軸方向に対する前記第3の軸方向のなす角度は0°以上45°未満である
発光装置。 - 光源と、第1の光学部材と、液晶パネルとを順に備え、
前記第1の光学部材は、
第1の軸方向と直交する第1の面に沿って広がる第1の透明光学シートと、
前記第1の軸方向において前記第1の透明光学シートと重なり合うように配置され、前記第1の面に沿って広がる第2の透明光学シートと
を有し、
前記第1の透明光学シートは、前記第1の軸方向に沿って進行する前記光源からの第1の入射光が前記第1の面に平行な第2の軸方向に沿った第1の方向へ屈折してなる第1の射出光を前記液晶パネルへ向けて射出する第1の領域部分と、前記第1の軸方向に沿って進行する前記光源からの第2の入射光が前記第1の方向と反対向きの第2の方向へ屈折してなる第2の射出光を前記液晶パネルへ向けて射出する第2の領域部分とが、前記第2の軸方向において交互に配置された構造を含み、
前記第2の透明光学シートは、前記第1の軸方向に沿って進行する前記光源からの第3の入射光が前記第1の面に平行な第3の軸方向に沿った第3の方向へ屈折してなる第3の射出光を前記液晶パネルへ向けて射出する第3の領域部分と、前記第1の軸方向に沿って進行する前記光源からの第4の入射光が前記第3の方向と反対向きの第4の方向へ屈折してなる第4の射出光を前記液晶パネルへ向けて射出する第4の領域部分とが、前記第3の軸方向において交互に配置された構造を含み、
前記第2の軸方向に対する前記第3の軸方向のなす角度は0°以上45°未満である
表示装置。 - 前記液晶パネルから見て前記第1の光学部材と反対側に第2の光学部材をさらに備え、
前記第2の光学部材は、前記液晶パネルから入射する画像光を、前記画像光の入射角度範囲よりも広い出射角度範囲で前記液晶パネルと反対側に出射する
請求項10記載の表示装置。 - 光源と、光学部材とを有する発光装置を備え、
前記光学部材は、
第1の軸方向と直交する第1の面に沿って広がる第1の透明光学シートと、
前記第1の軸方向において前記第1の透明光学シートと重なり合うように配置され、前記第1の面に沿って広がる第2の透明光学シートと
を有し、
前記第1の透明光学シートは、前記第1の軸方向に沿って進行する前記光源からの第1の入射光が前記第1の面に平行な第2の軸方向に沿った第1の方向へ屈折してなる第1の射出光を射出する第1の領域部分と、前記第1の軸方向に沿って進行する前記光源からの第2の入射光が前記第1の方向と反対向きの第2の方向へ屈折してなる第2の射出光を射出する第2の領域部分とが、前記第2の軸方向において交互に配置された構造を含み、
前記第2の透明光学シートは、前記第1の軸方向に沿って進行する前記光源からの第3の入射光が前記第1の面に平行な第3の軸方向に沿った第3の方向へ屈折してなる第3の射出光を射出する第3の領域部分と、前記第1の軸方向に沿って進行する前記光源からの第4の入射光が前記第3の方向と反対向きの第4の方向へ屈折してなる第4の射出光を射出する第4の領域部分とが、前記第3の軸方向において交互に配置された構造を含み、
前記第2の軸方向に対する前記第3の軸方向のなす角度は0°以上45°未満である
照明装置。
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2018
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- 2018-03-29 EP EP18809769.5A patent/EP3633420A4/en not_active Ceased
- 2018-03-29 CN CN201880028207.6A patent/CN110573913B/zh active Active
- 2018-03-29 US US16/615,989 patent/US11079521B2/en active Active
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2020
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Also Published As
Publication number | Publication date |
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US11079521B2 (en) | 2021-08-03 |
JP7419066B2 (ja) | 2024-01-22 |
US20210109260A1 (en) | 2021-04-15 |
CN110573913B (zh) | 2022-07-22 |
CN110573913A (zh) | 2019-12-13 |
US20200081164A1 (en) | 2020-03-12 |
EP3633420A1 (en) | 2020-04-08 |
EP3633420A4 (en) | 2020-05-13 |
JPWO2018220978A1 (ja) | 2020-04-16 |
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