WO2011018961A1 - Plaque de commande de lumière complexe, dispositif de source de lumière de zone et dispositif d’affichage d’image de type à transmission - Google Patents

Plaque de commande de lumière complexe, dispositif de source de lumière de zone et dispositif d’affichage d’image de type à transmission Download PDF

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Publication number
WO2011018961A1
WO2011018961A1 PCT/JP2010/063112 JP2010063112W WO2011018961A1 WO 2011018961 A1 WO2011018961 A1 WO 2011018961A1 JP 2010063112 W JP2010063112 W JP 2010063112W WO 2011018961 A1 WO2011018961 A1 WO 2011018961A1
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WO
WIPO (PCT)
Prior art keywords
light
control plate
light control
plate
convex portion
Prior art date
Application number
PCT/JP2010/063112
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English (en)
Japanese (ja)
Inventor
寛史 太田
裕次郎 川口
武志 川上
Original Assignee
住友化学株式会社
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Publication of WO2011018961A1 publication Critical patent/WO2011018961A1/fr

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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
    • 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
    • G02F1/133611—Direct backlight including means for improving the brightness uniformity
    • 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

Definitions

  • the present invention relates to a composite light control plate, a surface light source device, and a transmissive image display device.
  • a light source (107) arranged on the back side of the transmissive image display unit (109) is widely used.
  • the transmissive image display unit (109) include a liquid crystal display panel in which linear polarizing plates (192, 192) are arranged on both surfaces of a liquid crystal cell (191).
  • the light source (107) a plurality of linear light sources such as a straight tube type cold cathode ray tube are arranged in parallel with each other.
  • the light emitting diode is usually a point light source, and is used by arranging it in a discrete manner.
  • the conventional deflection structure plate is used in a direct type image display device in combination with a point light source such as a light emitting diode, the light from the point light source cannot be made sufficiently uniform, and the transmission type The image displayed by the image display unit has a problem that the brightness differs between the vicinity of the point light source and the position away from the point light source.
  • the present inventor has intensively studied to develop a deflection structure plate capable of uniformly illuminating the transmissive image display unit by sufficiently uniformly dispersing the light from the point light source, resulting in the present invention.
  • light incident from the first surface (11, 21, 31, 41) can be emitted from the second surface (12, 22, 32, 42) located on the opposite side of the first surface.
  • the third light control plate (30) and the fourth light control plate (40) are a composite light control plate (1) formed by overlapping each other in this order, and the first light control plate
  • the plate (10) and the second light control plate (20) are each a light control plate defined as follows, and the second light control plate (20) has the first direction (X21) in the first direction (X21).
  • the first surface (21) is perpendicular to the first direction (X11) of the first light control plate (10), and the second surface (12) of the first light control plate (10). Facing each other
  • the third light control plate (30) has a first direction (X31) orthogonal to the first direction (X11) of the first light control plate (10) and the first surface (31 ) Face the second surface (22) of the second light control plate (20), and the fourth light control plate (40) has the first direction (X41) in the first light control plate.
  • a composite light control plate parallel to the first direction (X11) of (10) and having the first surface (41) facing the second surface (32) of the third light control plate Is to provide.
  • Light control plate In a cross section orthogonal to the first direction of the convex portion, an axis passing through both ends of the convex portion with respect to the second direction is defined as an x axis, and the center of the both ends is located on the x axis.
  • a composite light control plate capable of suppressing luminance unevenness more stably, and a surface light source device and a transmissive image display device including the composite light control plate.
  • the composite light control plate (1) of the present embodiment includes a first light diffusion plate (first light control plate) (10) and a second light diffusion plate (second light control plate).
  • Plate) (20), a third light diffusing plate (third light control plate) (30) and a fourth light diffusing plate (fourth light control plate) (40) are superimposed on each other. is there.
  • the overlapping order of the first light diffusing plate (10), the second light diffusing plate (20), the third light diffusing plate (30), and the fourth light diffusing plate (40) is as described above.
  • the first light diffusion plate (10) has a first surface (11) and a second surface (12).
  • the second surface (12) is a surface located on the opposite side to the first surface (11). Light incident from the first surface (11) can be emitted from the second surface (12).
  • the first surface (11) of the first light diffusing plate (10) is usually a flat surface, may be a mirror surface, or may be a surface having light diffusibility over the entire surface.
  • a convex portion (13) is formed on the second surface (12).
  • the convex portion (13) extends in the first direction (X11).
  • a plurality of the convex portions (13) are formed on the second surface (12), and are arranged in parallel in the second direction (X12).
  • the second direction (X12) is a direction orthogonal to the first direction (X11).
  • Cross-sectional shape of the plurality of convex portions (13) formed on a second surface (12), the convex portion (13) may be substantially identical between, the x-axis direction length (w a ) May be used in combination with a plurality of types of convex portions.
  • the thickness (d1) of the first light diffusing plate (10) is the distance from the first surface (11) to the top of the convex portion (13).
  • the first light diffusing plate (10) has a thickness (d1) of, for example, 0.1 mm to 5 mm, and may be a film or a sheet. ) Is a sheet shape of 1 mm or more.
  • the convex portion (13) formed on the second surface (12) of the first light diffusing plate (10) has a contour shape represented by z (x) that satisfies the following formula (1).
  • An example of the cross-sectional shape of such a convex portion (13) is shown in FIG. In FIG. 2, one convex portion (13) is shown enlarged.
  • the shape of this convex part (13) is demonstrated using the local xz coordinate system shown in FIG. In this xz coordinate system, the x-axis is a direction in which a plurality of convex portions (13) are arranged, and is an axis parallel to the second direction (X12).
  • the z-axis is an axis parallel to the thickness direction of the light diffusing plate (10), and is orthogonal to the first direction (X11) and the second direction (X12).
  • the cross-sectional shape of the convex portion (13) is such that both ends (13a, 13a) are located on the x-axis and the top portion (13b) is located on the z-axis.
  • the cross-sectional shape of the convex portion (13) has a contour line symmetrical with respect to the z-axis.
  • the contour when the convex portion in the x-axis direction length of (13) was w a, in the range of -0.475w a ⁇ x ⁇ 0.475w a, satisfying the following formula (1) z It is represented by (x).
  • z 0 (x) has the formula (2) (In the formula (2), h a is 0.25w a ⁇ 0.75w a, k a is 0 to less than -1.0.) Is defined by. ]
  • h a in the z 0 which defines a z (x) in equation (1) (x) is 0.525w a, it shows the case k a is -0.400.
  • w a is the length in the x-axis direction of the convex portion (13)
  • h a is the convex portion (13 when the convex portion (13) is shaped as z 0 (x). )
  • the contour of the convex portion (13) is the contour indicated by 0.95 ⁇ z 0 (x) when z 0 (x) is obtained for a certain width w a .
  • the width w a of the convex portion (13) is usually 40 ⁇ m or more, preferably 250 ⁇ m or more because the formation of the convex portion (13) is easy, and the pattern resulting from the convex portion (13) is visually Therefore, it is usually 800 ⁇ m or less, preferably 450 ⁇ m or less.
  • Convex portions (13) is preferably h a in the above formula (2) is 0.4w a ⁇ 0.7w a, k a is preferably -0.5 or more.
  • h a and k a are (A) h a is 0.4825 w a to 0.521 w a and k a is ⁇ 0.232 to ⁇ 0.227, or h a is 0.4852 w a to 0.521 w a , K a is -0.232 to -0.227, (B) h a is from 0.5966 w a to 0.6837 w a , and k a is from ⁇ 0.075 to ⁇ 0.069, (C) h a is 0.525 w a and k a is ⁇ 0.4, It is.
  • Be convex portion of the first light diffusing plate (10) (13) is in the range of h a and k a are represented by the (B), more preferably.
  • the second light diffusion plate (20) has a first surface (21) and a second surface (22).
  • the second surface (22) is a surface located on the opposite side to the first surface (21). Light incident from the first surface (21) can be emitted from the second surface (22).
  • the first surface (21) of the second light diffusing plate (20) is usually a flat surface, may be a mirror surface, or may be a surface having light diffusibility over the entire surface.
  • a convex portion (23) is formed on the second surface (22) of the second light diffusing plate (20).
  • the convex portion (23) extends in the first direction (X21).
  • a plurality of the convex portions (23) are formed on the second surface (22), and are arranged in parallel in the second direction (X22).
  • the second direction (X22) is a direction orthogonal to the first direction (X21).
  • Cross-sectional shape of the plurality of convex portions (23) formed on the second face (22), the convex portion (23) may be substantially identical between, the x-axis direction length (w a ) May be used in combination with a plurality of types of convex portions.
  • the thickness (d2) of the second light diffusing plate (20) is the distance from the first surface (21) to the top of the convex portion (23).
  • the second light diffusing plate (20) has a thickness (d2) of, for example, 0.1 mm to 5 mm, and may be a film or a sheet. ) Is a film of less than 1 mm.
  • the second light diffusing plate (20) is as defined above, and the convex portion (23) formed on the second surface (22) has a cross-sectional shape of the first light diffusing plate.
  • the convex portion (13) in (10) has the same shape as described above.
  • convex portion of the second light diffusing plate (20) (23) is in a range of h a and k a are represented by the (B).
  • the third light diffusion plate (30) has a first surface (31) and a second surface (32).
  • the second surface (32) is a surface located on the opposite side to the first surface (31). Light incident from the first surface (31) can be emitted from the second surface (32).
  • the first surface (31) of the third light diffusing plate (30) is usually a flat surface, may be a mirror surface, or may be a surface having light diffusibility over the entire surface.
  • a convex portion (33) is formed on the second surface (32) of the third light diffusion plate (30).
  • the convex portion (33) extends in the first direction (X31).
  • a plurality of the convex portions (33) are formed on the second surface (32), and are arranged in parallel in the second direction (X32).
  • the second direction (X32) is a direction orthogonal to the first direction (X31).
  • the cross-sectional shapes of the plurality of convex portions (33) formed on the second surface (32) may be substantially the same between the convex portions (33), or a plurality of different lengths in the x-axis direction.
  • a combination of types of convex portions may be used.
  • the thickness (d3) of the third light diffusion plate (30) is the distance from the first surface (31) to the top of the convex portion (33).
  • the third light diffusing plate (30) has a thickness (d3) of, for example, 0.1 mm to 5 mm, and may be a film or a sheet. ) Is a film of less than 1 mm.
  • the convex portion (33) formed on the second surface (32) of the third light diffusion plate (30) may be, for example, an isosceles triangle, and the cross-sectional shape thereof is the first light diffusion.
  • the convex portion (13) in the plate (10) may have the same shape as described above.
  • the fourth light diffusion plate (40) has a first surface (41) and a second surface (42).
  • the second surface (42) is a surface located on the opposite side to the first surface (41). Light incident from the first surface (41) can be emitted from the second surface (42).
  • the first surface (41) of the fourth light diffusing plate (40) is usually a flat surface, may be a mirror surface, or may be a surface having light diffusibility over the entire surface.
  • a convex portion (43) is formed on the second surface (42) of the fourth light diffusing plate (40).
  • the convex portion (43) extends in the first direction (X41).
  • a plurality of the convex portions (43) are formed on the second surface (42), and are arranged in parallel in the second direction (X42).
  • the second direction (X42) is a direction orthogonal to the first direction (X41).
  • Cross-sectional shape of the plurality of convex portions (43) formed on a second surface (42), the convex portion (43) may be substantially identical between, the x-axis direction length (w a ) May be used in combination with a plurality of different convex portions.
  • the thickness (d4) of the fourth light diffusion plate (40) is the distance from the first surface (41) to the top of the convex portion (43).
  • the fourth light diffusing plate (40) has a thickness (d4) of, for example, 0.1 mm to 5 mm, and may be a film or a sheet. ) Is a film of less than 1 mm.
  • the convex part (43) formed on the second surface (42) of the fourth light diffusion plate (40) may have an isosceles triangle, for example, or the first light diffusion.
  • the convex portions (13, 23) in the plate (10) and the second light diffusion plate (20) may have the same shape as described above.
  • the convex portion (33) of the third light diffusing plate (30) and the convex portion (43) of the fourth light diffusing plate (40) may have the same cross-sectional shape.
  • the cross-sectional shape may be different.
  • the first light diffusing plate (10), the second light diffusing plate (20), the third light diffusing plate (30), and the fourth light diffusing plate (40) are made of a transparent material.
  • the refractive index of the transparent material is, for example, 1.46 to 1.62, and the refractive index of the transparent material constituting the first light diffusing plate (10) is usually 1.56 to 1.62.
  • transparent materials include transparent resin materials and transparent glass materials.
  • transparent resin materials examples include polycarbonate resin (refractive index: 1.59), MS resin (methyl methacrylate-styrene copolymer resin) (refractive index: 1.56 to 1.59), polystyrene resin (refractive index: 1.59) and the like are exemplified, and polystyrene resin is preferred from the viewpoint of cost and low moisture absorption.
  • additives such as an ultraviolet absorber, an antistatic agent, an antioxidant, a processing stabilizer, a flame retardant, and a lubricant can be added to the transparent resin material. These additives can be used alone or in combination of two or more.
  • UV absorbers examples include benzotriazole UV absorbers, benzophenone meter UV absorbers, cyanoacrylate UV absorbers, malonic ester UV absorbers, oxalic anilide UV absorbers, and triazine UV absorbers. Preferred are benzotriazole ultraviolet absorbers and triazine ultraviolet absorbers.
  • the transparent resin material is usually used without adding a light diffusing agent as an additive, but may be added with a light diffusing agent as long as it is a slight amount that does not impair the object of the present invention.
  • a light diffusing agent used when adding a light diffusing agent to a transparent material a first light diffusing plate (10), a second light diffusing plate (20), a third light diffusing plate (30), and A powder having a refractive index different from that of the transparent material constituting the fourth light diffusion plate (40) is used, and the powder is used by being dispersed in the transparent material.
  • a light diffusing agent organic particles such as styrene resin particles and methacrylic resin particles, and inorganic particles such as calcium carbonate particles and silica particles are used, and the particle diameter is usually 0.8 ⁇ m to 50 ⁇ m.
  • the first light diffusing plate (10), the second light diffusing plate (20), the third light diffusing plate (30), and the fourth light diffusing plate (40) are each made of a single transparent material.
  • a layer board may be sufficient and the multilayer board of the structure where the layer comprised from the mutually different transparent material was laminated
  • stacked may be sufficient.
  • the light diffusing plate (10, 20, 30, 40) is a multilayer plate, one or both sides of the light diffusing plate (10, 20, 30, 40) usually have a thickness of 10 ⁇ m to 200 ⁇ m, preferably 20 ⁇ m to 100 ⁇ m. It is preferable to use a structure in which a skin layer is formed, and a transparent resin material to which the skin layer is formed is added with an ultraviolet absorber.
  • the light diffusing plate (10, 20, 30, 40) By adopting such a configuration, it is possible to prevent deterioration of the light diffusing plate (10, 20, 30, 40) due to ultraviolet light that may be included in the light source or light from the outside.
  • a fluorescent tube or the like is used as the light source.
  • a skin layer is formed on the first surface (11, 21, 31, 41) since deterioration due to ultraviolet rays from the fluorescent tube can be prevented.
  • the second surface (12 22, 32, 42) it is more preferable in terms of cost that no skin layer is formed.
  • the content of the ultraviolet absorber is usually 0.5% by mass to 5% by mass, preferably based on the transparent resin material. Is 1% by mass to 2.5% by mass.
  • the first light diffusing plate (10), the second light diffusing plate (20), the third light diffusing plate (30), and the fourth light diffusing plate (40) are coated with an antistatic agent on one side or both sides. May be. By applying an antistatic agent, dust adhesion due to static electricity can be prevented, and a decrease in light transmittance due to dust adhesion can be prevented.
  • the first light diffusing plate (10), the second light diffusing plate (20), the third light diffusing plate (30), and the fourth light diffusing plate (40) are manufactured by, for example, cutting out from a transparent material. can do. Moreover, when using a transparent resin material as a transparent material, it can manufacture by normal methods, such as an injection molding method, an extrusion molding method, a press molding method, a photopolymer method, for example.
  • the composite light control plate (1) of this embodiment includes the first light diffusing plate (10), the second light diffusing plate (20), the third light diffusing plate (30), and the fourth light diffusing plate. (40) are superimposed on each other in this order.
  • the second light diffusing plate (20) has a first direction (X21) in the first light diffusing plate (10). It is orthogonal to the direction (X11) of 1.
  • the first direction (X31) is orthogonal to the first direction (X11) of the first light diffusion plate (10).
  • the first direction (X41) is parallel to the first direction (X11) of the first light diffusion plate (10).
  • the second light diffusing plate (20) has a first surface (21) which is the first light diffusing plate (10). Facing the second face (12).
  • the second light diffusing plate (20) is usually superimposed on the first light diffusing plate (10) via an air layer, and the distance between the second light diffusing plates (20) is the second surface (12
  • the distance (d12) from the top portion (13b) of the convex portion (13) formed on the first surface (21) of the second light diffusion plate (20) is usually 5 mm or less, and the composite light From the viewpoint of making the control plate (1) compact, the distance (d12) is 0 mm, and the top portion (13b) of the convex portion (13) formed on the first light diffusion plate (10) is
  • the first light diffusion plate (20) may be in contact with the first surface (21).
  • the first surface (31) faces the second surface (22) of the second light diffusion plate (20).
  • the third light diffusing plate (30) is usually superimposed on the second light diffusing plate (20) via an air layer, and the distance between the third light diffusing plates (30) and the second surface (22) of the second light diffusing plate (20).
  • the distance (d23) from the top part (23b) of the convex part (23) formed on the first surface (31) of the third light diffusion plate (30) is usually 5 mm or less, and the composite light From the viewpoint of making the control plate (1) compact, the distance (d23) is 0 mm, and the top portion (23b) of the convex portion (23) formed on the second light diffusion plate (20) is
  • the third light diffusing plate (30) may be in contact with the first surface (31).
  • the first surface (41) faces the second surface (32) of the third light diffusion plate (30).
  • the fourth light diffusing plate (40) is usually superimposed on the third light diffusing plate (30) via an air layer, and the distance between the fourth light diffusing plate (40) and the second surface (32) of the third light diffusing plate (30).
  • the distance (d34) from the top (33b) of the convex part (33) formed on the first surface (41) of the fourth light diffusion plate (40) is usually 5 mm or less, and the composite light From the viewpoint of making the control plate (1) compact, the distance (d34) is 0 mm, and the top portion (33b) of the convex portion (33) formed on the third light diffusion plate (30) is
  • the first light diffusion plate (40) may be in contact with the first surface (41).
  • the first surface (31) of the third light diffusing plate (30) is preferably a surface having light diffusibility over the entire surface from the viewpoint that moiré can be prevented.
  • the first surface (31) may be constituted by a skin layer containing fine particles called a matting agent,
  • One surface (31) may be embossed or blasted, or a matting layer may be formed by applying a coating solution containing a matting agent and a binder.
  • the convex portion (23) formed on the second surface (22) of the second light diffusing plate (20) or the second portion of the third light diffusing plate (30) may be used.
  • the convex portion (33) formed on the surface (32) is composed of a plurality of types of convex portions (23, 33) having different widths, and the plurality of types of convex portions (23, 33). It is also preferable that they are arranged in parallel in an irregular order.
  • the first surface (41) of the fourth light diffusing plate (40) is preferably a surface having light diffusibility over the entire surface from the viewpoint of preventing the occurrence of moiré.
  • the first surface (41) may be constituted by a skin layer containing fine particles called a matting agent.
  • One surface (41) may be embossed or blasted, or a matting layer may be formed by applying a coating solution containing a matting agent and a binder.
  • the convex portion (13) formed on the second surface (12) of the first light diffusing plate (10) or the second portion of the fourth light diffusing plate (40) may be used.
  • the convex portion (43) formed on the surface (42) is composed of a plurality of types of convex portions (13, 43) having different widths, and the plurality of types of convex portions (23, 33). It is also preferable that they are arranged in parallel in an irregular order.
  • the convex portion (13) of the first light diffusing plate (10) and the convex portion (23) of the second light diffusing plate (20) may have the same cross-sectional shape or different from each other. It may have a cross-sectional shape.
  • the first surface (11) of the first light diffusing plate (10) and the first surface (21) of the second light diffusing plate (20) may be surfaces having light diffusibility.
  • the first surfaces (11, 21) are constituted by a skin layer containing fine particles called a matting agent.
  • the first surface (11, 21) may be embossed or blasted, or a matting agent may be mixed with a binder to form a coating solution, which is then used as the first surface ( 11, 21) may be applied to impart light diffusibility.
  • the composite light control plate (1) of the present embodiment is preferably used by being incorporated in the surface light source device (6).
  • the surface light source device (6) includes the composite light control plate (1) of the present embodiment and a light source (7).
  • the light source (7) supplies light to the first surface (11) of the first light diffusion plate (10) constituting the composite light control plate (1).
  • Examples of the light source (7) include a linear light source such as a cold cathode ray tube, and a point light source such as an LED (light emitting diode) is preferable.
  • the interval (L) between the plurality of light sources (7) is the distance between the light source centers, and is usually 10 mm to 150 mm.
  • the distance (D) from the center of the light source (7) to the first surface (11) of the first light diffusion plate (10) is usually 3 mm to 50 mm, and the ratio [L / D] is 2 or more. Furthermore, it is preferable that it is 2.5 or more from the point which can make a surface light source device thin.
  • the transmissive image display device (8) includes the surface light source device (6) and the transmissive image display unit (9).
  • the transmissive image display section (9) is exemplified by a transmissive liquid crystal display section composed of, for example, a liquid crystal cell (91) and linearly polarizing plates (92) arranged on both surfaces thereof.
  • the transmissive image display section (9) is illuminated with light transmitted through the composite light control plate (1) to display an image.
  • the light passing through the composite light control plate (1) is light output from a plurality of light sources (7) constituting the surface light source device (6).
  • the composite light control plate (1) may be arranged so that the first direction (X11) of the first light diffusion plate (10) is the horizontal direction of the screen. It may be arranged in the vertical direction.
  • the composite light control plate (1) of this embodiment is arranged so that the first direction (X11) of the first light diffusion plate (10) is in the horizontal direction of the screen, the first light diffusion plate (10) is arranged.
  • the second direction (X12) is the vertical direction, and the second direction (X22) of the second light diffusion plate (20) is the horizontal direction.
  • the composite light control plate (1) of the present embodiment is arranged so that the first direction (X11) of the first light diffusion plate (10) is the vertical direction of the screen, the first light diffusion plate (10) is arranged.
  • the second direction (X12) is the horizontal direction, and the second direction (X22) of the second light diffusing plate (20) is the vertical direction.
  • the luminance unevenness when viewed from the oblique horizontal direction because it can further suppress the first light diffusing plate h a and w ratio of a [R1 h a / w a] in equation (2) representing the contour shape of the convex portion (13) of (20)
  • k a in equation (2) representing the contour shape of the convex portion (13) of the first light diffuser plate (10) is convex portion of the second light diffusing plate (20) (23) is preferably smaller than k a in equation (2) representing the contour shape.
  • the light source interval (LV) in the vertical direction of the screen is equal to or larger than the light source interval (LH) in the horizontal direction. It is.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Planar Illumination Modules (AREA)
  • Liquid Crystal (AREA)

Abstract

L’invention concerne une plaque de commande de lumière complexe (1) comprenant une à quatre plaques de diffusion de lumière (10 à 40) stratifiées l’une sur l’autre dans l’ordre précité, chacune de la première et de la deuxième plaque de diffusion de lumière (10, 20) étant telle que définie ci-dessous. La première direction (X21) de la deuxième plaque de diffusion de lumière (20) est perpendiculaire à la première direction (X11) de la première plaque de diffusion de lumière (10), la première direction (X31) de la troisième plaque de diffusion de lumière (30) est perpendiculaire à la première direction (X11) de la première plaque de diffusion de lumière (10), et la première direction (X41) de la quatrième plaque de diffusion de lumière (40) est parallèle à la première direction (X11) de la première plaque de diffusion de lumière (10). Une plaque de diffusion de lumière, par rapport à une surface de section transversale de partie projetée formée par ladite plaque de diffusion de lumière (la surface de section transversale étant prise dans la direction perpendiculaire à la première direction), et à la forme de la surface de section transversale de la forme de contour de la surface de section transversale est représentée par z(x) qui satisfait à la formule (1) : 0,95 × z0(x) ≤ z(x) ≤ 1,05 × z0(x), [z0(x) étant défini par la formule (2)] dans une plage de -0,475wa ≤ x ≤ 0,475wa,et wa représentant la longueur de la partie projetée dans la seconde direction.
PCT/JP2010/063112 2009-08-10 2010-08-03 Plaque de commande de lumière complexe, dispositif de source de lumière de zone et dispositif d’affichage d’image de type à transmission WO2011018961A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009-185698 2009-08-10
JP2009185698 2009-08-10

Publications (1)

Publication Number Publication Date
WO2011018961A1 true WO2011018961A1 (fr) 2011-02-17

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PCT/JP2010/063112 WO2011018961A1 (fr) 2009-08-10 2010-08-03 Plaque de commande de lumière complexe, dispositif de source de lumière de zone et dispositif d’affichage d’image de type à transmission

Country Status (3)

Country Link
JP (1) JP2011059666A (fr)
TW (1) TW201207440A (fr)
WO (1) WO2011018961A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07218911A (ja) * 1994-02-08 1995-08-18 Hitachi Ltd 液晶表示装置およびその視野角設定方法
JPH08146225A (ja) * 1994-11-22 1996-06-07 Tosoh Corp バックライト
JP2590227Y2 (ja) * 1993-06-04 1999-02-10 株式会社エンプラス 面光源装置
JP2007286261A (ja) * 2006-04-14 2007-11-01 Sony Corp 光学シート、バックライト装置および液晶表示装置
JP2009075366A (ja) * 2007-09-20 2009-04-09 Toppan Printing Co Ltd 光学シート、バックライトユニット及び表示装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2590227Y2 (ja) * 1993-06-04 1999-02-10 株式会社エンプラス 面光源装置
JPH07218911A (ja) * 1994-02-08 1995-08-18 Hitachi Ltd 液晶表示装置およびその視野角設定方法
JPH08146225A (ja) * 1994-11-22 1996-06-07 Tosoh Corp バックライト
JP2007286261A (ja) * 2006-04-14 2007-11-01 Sony Corp 光学シート、バックライト装置および液晶表示装置
JP2009075366A (ja) * 2007-09-20 2009-04-09 Toppan Printing Co Ltd 光学シート、バックライトユニット及び表示装置

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JP2011059666A (ja) 2011-03-24
TW201207440A (en) 2012-02-16

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