WO2008047794A1 - Dispositif d'éclairage et dispositif d'affichage d'image associé - Google Patents

Dispositif d'éclairage et dispositif d'affichage d'image associé Download PDF

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Publication number
WO2008047794A1
WO2008047794A1 PCT/JP2007/070175 JP2007070175W WO2008047794A1 WO 2008047794 A1 WO2008047794 A1 WO 2008047794A1 JP 2007070175 W JP2007070175 W JP 2007070175W WO 2008047794 A1 WO2008047794 A1 WO 2008047794A1
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WO
WIPO (PCT)
Prior art keywords
light
control means
direction control
light source
diffusing
Prior art date
Application number
PCT/JP2007/070175
Other languages
English (en)
Japanese (ja)
Inventor
Yoshiki Mukoo
Ikuo Onishi
Original Assignee
Kuraray Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kuraray Co., Ltd. filed Critical Kuraray Co., Ltd.
Priority to JP2008539824A priority Critical patent/JPWO2008047794A1/ja
Publication of WO2008047794A1 publication Critical patent/WO2008047794A1/fr

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Classifications

    • 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
    • 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
    • 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
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/16—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 series; tandem

Definitions

  • the present invention relates to an illuminating device including a plurality of linear light sources and an image display device using the illuminating device. Particularly, the illuminating device is required to have a large size, high luminance, luminance uniformity, and high viewing angle.
  • the present invention relates to an illumination device and an image display device that are preferably used for a signboard device, a liquid crystal display device, and the like.
  • an edge light system in which light from a light source disposed on a side edge of a light guide plate is guided in the front direction by the light guide plate and uniformed by a diffusion sheet, and an illumination surface
  • a direct method in which a light source is arranged on the backside of the light source and the light is made uniform by a light diffusion plate.
  • the edge light method which is advantageous by providing the light source at the side edge, is mainly used in fields where thinness is required such as mobile phones and mopile personal computers. It was.
  • Figure 1 shows an example of this type of illumination method.
  • the illuminating device has a rectangular emission surface consisting of a width direction and a height direction perpendicular to the width direction, a plurality of linear light sources 1, a diffusion means 2 (light diffusion plate), and a reflection plate 6
  • the linear light source 1 is arranged in one imaginary plane parallel to the width direction and the height direction, and the linear light source 1 has a longitudinal direction arranged parallel to the width direction.
  • the diffusing means 2 is arranged on the emission surface side of the arranged linear light sources 1, and the main surface is linear.
  • the light source 1 is parallel to the virtual plane in which the light sources 1 are arranged, the reflector 4 is located on the opposite side of the diffuser 2 (light diffuser plate) across the arranged linear light sources 1, and
  • the main surface of the reflecting plate 6 is parallel to the virtual plane on which the linear light source 1 is arranged IJ.
  • the light diffusing agent is usually uniformly dispersed and has a uniform optical performance within the main surface.
  • exit surface on the rectangle is most common in many applications of the present illumination device such as an image cover device and an illumination signboard.
  • the linear light source is the most common light source for these illumination devices because it can easily eliminate unevenness of brightness and the wiring is short and easy compared to the point light source.
  • a cold cathode tube or the like is often used as the linear light source.
  • the linear light source is arranged parallel to the width direction of the rectangle of the exit surface. This is preferable because the number of linear light sources can be reduced.
  • luminance unevenness which is a problem by arranging linear light sources at equal intervals in the same plane, becomes periodic due to the arrangement of linear light sources, and is a light diffusing plate having uniform optical performance in the main surface.
  • the reflector is not essential, but it works to reflect the light emitted from the linear light source and the light diffusing plate in the direction opposite to the exit direction to the exit side and use it again as the exit light, improving the light utilization efficiency. Is advantageous.
  • the direct method is a method in which the use efficiency of light emitted from the light source, that is, the ratio of the light flux emitted from the emission surface to the light flux emitted from the light source is high, and the optical subtraction is freely increased. Therefore, the required high brightness can be easily obtained.
  • an illumination signboard has a simple structure, and a high brightness can be easily obtained without using a brightness enhancement film.
  • a light diffusion plate in which a light diffusing agent is dispersed in a base resin such as a methacrylic resin, a polycarbonate resin, a styrene resin, or a chlorinated resin is widely used.
  • a base resin such as a methacrylic resin, a polycarbonate resin, a styrene resin, or a chlorinated resin.
  • An example of a direct display device using a light diffusing plate is as already described with reference to FIG.
  • the method using these light diffusing agents is not preferable from the viewpoint of energy saving because it absorbs light into the light diffusing agent and diffuses light in unnecessary directions.
  • the lamp image can be reduced by arranging many light sources close to each other.
  • These diffusing plates can achieve the desired diffusivity while avoiding or reducing the use of a diffusing agent, so that the light utilization efficiency can be increased.
  • a diffusing agent so that the light utilization efficiency can be increased.
  • a prism sheet with low light loss is also proposed! / (For example, see Patent Document 7).
  • these prism sheets direct diffused light to the front. The purpose of this is to reduce the light loss, so it is impossible to eliminate the lamp image that occurs in the direct system.
  • the demand for thinning is not strict compared with mobile phones such as mopile PCs, so the distance between the light source and the light diffusion plate can be shortened, and the number of optical films can be reduced. This can be dealt with by reducing costs.
  • the direct method can increase the number of linear light sources as described above, and it is easy to obtain high brightness. From the viewpoint of energy saving, a large amount of light diffusing agent is used to cancel the lamp image. It must be suppressed to reduce the use efficiency.
  • Patent Document 1 Refer to Japanese Patent Laid-Open No. 2-17
  • Patent Document 2 Refer to Japanese Patent Laid-Open No. 54-155244
  • Patent Document 3 Refer to Japanese Patent No. 2852424
  • Patent Document 4 Japanese Patent Laid-Open No. 2000-338895
  • Patent Document 5 See Japanese Patent Application Laid-Open No. 2002-352611
  • Patent Document 6 See JP-A-10-123307
  • Patent Document 7 Refer to Japanese Patent No. 3455884
  • the present invention it is easy to cope with an increase in the size of the device with high luminance, particularly high front luminance, wide viewing angle, and high light utilization efficiency, and the exact position between the light source and other members. It is an object to provide an illumination device that eliminates uneven brightness in the front direction and is advantageous for productivity and thickness reduction, and an image display device using the same.
  • the present inventors arrange the above-mentioned first light beam control means and second light beam direction control means in a general direct lighting system as illustrated in FIG. I found that the problem was solved.
  • the first light beam control means restricts the viewing angle in the width direction, concentrates the front energy in the front direction, and is disposed on the exit surface of the first light beam control means.
  • the viewing angle in the height direction is controlled by the two-beam control means.
  • the viewing angle in the width direction narrowed by the first light control means is appropriately widened to increase the light utilization efficiency, while at the same time increasing the brightness, widening the viewing angle, Particularly, it is possible to achieve an improvement in front luminance suitable for many applications.
  • the second light beam direction control means a plurality of bowl-shaped convex portions and optimizing the cross-sectional shape thereof, at all points on the surface where light enters the second light beam direction control means. It is possible to provide a uniform property that controls the direction of light emission of incident light in the same way, and it is not necessary to align the light source in addition to being advantageous in changing the size.
  • the light intensity distribution in the front direction constant, luminance unevenness in the front direction can be eliminated.
  • the combined functions of the second light beam direction control means such as eliminating uneven brightness and improving brightness, can eliminate or reduce the use of other functional optical films, which is advantageous for productivity and thinning.
  • it is possible to increase the front intensity by increasing the ratio of light emission in the front direction of the second light direction control means.
  • an image display device can be obtained by arranging a transmissive display element on the outgoing light side of these illumination devices.
  • “several ridge-shaped protrusions” refers to protrusions that have a curved or polygonal cross section (excluding triangles) and extend in one direction.
  • the cross section has two straight lines excluding the main surface.
  • the so-called “prism” composed of is not included.
  • the illumination device provided by the present invention is a substantially rectangular parallelepiped illumination device having a width, a height, and a thickness that intersect perpendicularly to each other, and the illumination device includes a plurality of linear light sources, Light beam direction control means and second light beam direction control means, the first light beam direction control means is a member for narrowing the viewing angle characteristics in the width direction, and the second light beam direction control means is the width direction This is a member to moderately widen the viewing angle characteristics and eliminate luminance unevenness.
  • the distribution of the outgoing light intensity is almost constant, the luminance unevenness is eliminated and the luminance uniformity can be obtained.
  • the distribution of the light output intensity is the sum of the light output intensity distributions of the respective linear light sources. Is resolved.
  • the illumination device of the present invention eliminates uneven brightness in the front direction by making the light intensity distribution in the front direction substantially constant.
  • an image display device can be obtained by arranging a transmissive display element on the emission side of these illumination devices.
  • the front direction is the second light direction control hand. It means a small solid angle centered on the normal direction of the main surface of the step.
  • the present invention is a.
  • a linear light source, a first light direction control means, a second light direction control means are provided in this order toward the emission side in the thickness direction,
  • a plurality of the linear light sources are arranged in parallel over the entire area,
  • Each of the first light direction control means and the second light direction control means is a plurality of bowl-shaped protrusions
  • the first light direction control means controls the light direction from the linear light source along the width direction to the second light direction control means
  • the second light direction control means controls the light direction along the height direction of the light from the first light direction control means
  • a diffusing unit may be provided between the linear light source and the first light beam direction controlling unit.
  • cross-sectional shapes perpendicular to the longitudinal direction of the hook-shaped convex portions of the first light direction control means and the second light direction control means may be substantially the same.
  • the diffusing means is provided on a sheet-like member that is integral with the first light beam direction controlling means! /!
  • the diffusion means is provided on a sheet-like member different from the first light beam direction control means! /.
  • the diffusing unit may be fine particles dispersed in and / or on the surface of the sheet-like member, or the diffusing unit may be on the surface of the sheet-like member.
  • corrugated shape may be sufficient.
  • the present invention provides the illumination device, wherein the plurality of linear light sources include the illumination device. It may be arranged so as to be parallel to the width direction of the device and over substantially the entire width direction, and may be arranged IJ along the height direction.
  • the present invention provides an image display device characterized in that a transmissive display element is provided on the surface on which the second light direction control means is provided so as to cover the surface of the illumination device. It is a position.
  • the distribution of the intensity of light emission in the front direction in which the light use efficiency is high and the viewing angle is wide is made constant, so that there is no uneven brightness in the front direction such as a lamp image and the front direction.
  • a lighting device with high luminance is provided.
  • the same light control can be performed on the first light beam direction control means, the second light beam direction control means, and the light incident on the reflector plate at any place, the linear light source and other light sources can be controlled. There is no need for alignment with other members, and it is possible to immediately respond to changes in the display size and the number and arrangement of linear light sources, and to provide a lighting device that can be manufactured with high productivity.
  • the effects of the present invention are as follows. Since the width, height, and thickness values increase in this order and the width and height directions become the illumination surface, the display is thin and has a large screen, and the width direction is arranged horizontally, which is suitable for many display devices.
  • the first light direction control means can control the light direction along the width direction to obtain a high front luminance and a preferable horizontal viewing angle.
  • the second light direction control means can obtain a preferable vertical viewing angle by controlling the light direction along the height direction. Furthermore, the second light direction control means improves the diffusibility in the horizontal direction by returning part of the light to the first light direction control means, thereby eliminating unevenness in brightness desirable in many applications and obtaining uniform brightness.
  • a sheet-like portion in which the diffusing means is integral with the first light beam direction control means By being provided in the material, the number of members can be reduced, which is advantageous for thinning.
  • the diffusing means can be a support
  • the first light direction control means can be made thin, so that a change in optical characteristics caused by warping can be reduced, and the first light direction control means. It is advantageous in the manufacture of.
  • the diffusing means is a sheet-like member, mechanical strength can be ensured, and light diffusibility can be controlled by adjusting the concentration, size, refractive index, etc. of the fine particles, and uneven brightness in the front direction can be immediately observed. It is advantageous in eliminating it.
  • the diffusing means has a fine uneven shape provided on the surface of the sheet-like member, so that the manufacture becomes easy.
  • the linear light source is parallel to the rectangular width direction of the exit surface. Arrangement force This is preferable because the number of linear light sources can be reduced. Further, by arranging the linear light sources at equal intervals in the same plane, the luminance unevenness that is the subject of the present invention becomes periodic due to the arrangement of the linear light sources, and uniform optical performance in the main surface. It is easy to eliminate the uneven brightness with the beam direction control means having In addition, by arranging the linear light source in parallel with the width direction, the number of parts can be reduced as compared with the arrangement in the height direction.
  • the lighting device is a lighting device having a high front luminance and a uniform luminance distribution in the front direction.
  • the lighting device can be used as a preferable image display device.
  • the image display device refers to a display module in which an illumination device and a display device are combined, and a device having at least an image display function such as a television or a personal computer monitor using the display module.
  • FIG. 1 is a schematic view of a conventional direct illumination device.
  • FIG. 2 is a schematic diagram of a preferred example of a lighting device of the present invention, and a configuration diagram of a backlight device for a liquid crystal display device according to a second embodiment and a fourth embodiment, viewed from obliquely above.
  • FIG. 3 is a configuration diagram of a backlight device for a liquid crystal display device according to Example 1 and Example 3 as viewed from obliquely above.
  • FIG. 4 is a configuration diagram of a backlight device for a liquid crystal display device according to Example 5 as viewed obliquely from above.
  • FIG. 5 is a diagram showing the configuration of a backlight device for a liquid crystal display device according to Example 6 as viewed from diagonally above.
  • FIG. 6 is a diagram showing the configuration of the backlight device for a liquid crystal display device according to Comparative Example 1 as viewed from diagonally above.
  • FIG. 7 is a configuration diagram seen from diagonally above the backlight device for a liquid crystal display device according to Comparative Example 2.
  • FIG. 8 is a diagram seen from diagonally above the backlight device for a liquid crystal display device according to Comparative Example 3.
  • FIG. 5 is a diagram showing the configuration of a backlight device for a liquid crystal display device according to Example 6 as viewed from diagonally above.
  • FIG. 6 is a diagram showing the configuration of the backlight device for a liquid crystal display device according to Comparative Example 1 as viewed from diagonally above.
  • FIG. 7
  • FIG. 9 is a block diagram of the backlight device for a liquid crystal display device according to Comparative Example 4 as viewed from diagonally above.
  • FIG. 10 is a diagram of the backlight device for a liquid crystal display device according to Comparative Example 5 as viewed from diagonally above.
  • FIG. 11 is a view showing the configuration of the backlight device for a liquid crystal display device according to Comparative Example 6.
  • FIG. 12 is a view showing the configuration of the backlight device for a liquid crystal display device according to Comparative Example 7.
  • FIG. 13 is a configuration diagram viewed from above. [FIG. 13] A configuration of a backlight device for a liquid crystal display device according to Comparative Example 8 viewed from obliquely above. Description of Zudea sign
  • FIG. 2 shows an example of an embodiment of a lighting device provided by the present invention.
  • a lighting device having a rectangular emission surface composed of a width direction and a height direction perpendicular thereto, wherein the linear light source 1 has the width It is arranged in parallel to the height direction and along the width direction in one imaginary plane parallel to the direction and the height direction.
  • a first light beam direction control means 3 is provided in a single virtual plane parallel to the width direction and the height direction, in parallel with the height direction, from the linear light source 1 toward the exit surface.
  • the first light beam direction control member and the second light beam direction control member 4 are arranged in this order.
  • the diffusing means 2 in FIG. 2 is not necessarily essential in the present invention, but is preferably used because it has an effect of easily erasing the image of the linear light source.
  • the diffusing means 2 is not limited to the light diffusing plate as shown in FIG. 2, as will be described later.
  • the first light beam direction control means 3 As a suitable example of the first light beam direction control means 3, a plurality of micro-arrays arranged in parallel in the height direction on at least one of the main surfaces of the plate-like member provided with the main surface perpendicular to the thickness direction. And a ridge-like convex part.
  • the second light direction control means 4 a plurality of parallel arrangements in the width direction are arranged on at least one of the main surfaces of the plate-like member provided with the main surface perpendicular to the thickness direction. And a small bowl-shaped convex part.
  • the light direction control means is constituted by a convex portion provided on the main surface of the plate-like member.
  • the light beam direction control means can be provided on the incident surface located on the linear light source side and / or the exit surface located on the light exit surface side of the illumination device.
  • the cross-sectional shape of the convex portion can be selected from a polygon (excluding triangles), a curve, and a shape combining these.
  • a polygon excluding triangles
  • the polygon can be dispersed while controlling the light emission direction, so that highly uniform light emission can be obtained.
  • the angle of the adjacent side can be made relatively wide, it is preferable that it is difficult to break.
  • it is a curved surface, it is more preferable from the viewpoints of the uniformity and resistance to breakage.
  • the preferred curved surface shape includes a substantially semicircular shape, an elliptical shape, a parabolic shape, etc., where the inflection point is not practical, and a wave shape that gently curves near the valley. It is When the number of inflection points is small, the direction of the light beam can be easily controlled, and irregular reflection is less likely to occur. On the contrary, in order to improve the diffusibility, a plurality of inflection points can be provided.
  • a flat portion may be provided between the force convex portions arranged continuously.
  • Flat part By providing, it is advantageous because the convex portion of the mold has a shape that is difficult to deform. Further, since the light directly above the linear light source is emitted in the front direction, it is advantageous when only the luminance just above the linear light source is increased. Conversely, in the case of a shape that does not have a flat part, all the light can be controlled by the inclination of the slope of the convex part, so the light intensity distribution in the front direction is uniform.
  • the light exit direction distribution is determined by the slope angle distribution of the convex portion. Therefore, by adjusting the slope angle distribution, for example, the front luminance can be made uniform in the plane, so that it becomes a suitable surface light source. Further, since the second light direction control means controls the light direction in the height direction, it is possible to alleviate the luminance unevenness of the linear light source arranged in parallel to the width direction.
  • the second light beam direction control means reflects straight light from the linear light source causing the lamp image, that is, light incident on the second light beam direction control means at a small incident angle, and the second light beam direction control means. Luminance unevenness is mitigated by transmitting light incident at a large incident angle.
  • the second light direction control means can determine the ratio of reflection to the first light direction control means by the slope angle distribution.
  • the light reflected by the second light direction control member impinges on the first light direction control member to be transmitted and reflected, thereby increasing the diffusibility, further mitigating luminance unevenness, and also improving the luminance uniformity in the width direction.
  • the convex portions as the first light direction control means and / or the second light direction control means have the same cross-sectional shape. Because the optical properties of the second beam direction control means are uniform, alignment is not required, and it is possible to respond immediately to changes in the display size, the number of linear light sources and the arrangement, and to produce a lighting device with high productivity. be able to.
  • first light direction control means and / or the second light direction control means are hook-shaped convex portions
  • the first light direction control means and the second light direction control means are used as the base material of the optical member.
  • the material used can be preferably used and is usually a translucent thermoplastic tree. Fat is used.
  • (meth) acrylic resin for example, (meth) acrylic resin, (meth) acrylic styrene copolymer resin, styrene resin, aromatic bur resin, olefin resin, ethylene acetate butyl copolymer resin, chlorinated butyl resin, butyl ester
  • resins polycarbonates, fluorine resins, urethane resins, silicone resins, amide resins, imide resins, polyester resins, epoxy resins, phenol resins, urea resins, melamine resins, and the like. It is also possible to 2P-mold the first light direction control means or the second light direction control means on the film or sheet as the base material with an ultraviolet curable resin.
  • the first light direction control means and / or the second light direction control means of the present invention can be made using a plurality of different materials as required.
  • the support plate is aligned with the film surface on which the protrusions are not formed to control the light beam direction. It can also be a member.
  • the amount of the expensive ultraviolet curable resin used can be reduced by using a general-purpose translucent resin other than the vicinity of the convex portion.
  • the light diffusing means is in a plate-like member, and the first light direction control means and the second light direction control means are plate-like structures, these may be the same plate.
  • the base portion of the first light direction control means and / or the second light direction control means and the line of the first light direction control means and / or the second light direction control means may be a plurality of types of plates having different refractive indexes.
  • the light diffusing means for the first light direction control means and / or the second light direction control means of the present invention, it is possible to further improve the uniformity of luminance.
  • the light diffusing means includes a method of providing random irregularities such as embossing on the main surface of the plate member, a method of dispersing a small amount of light diffusing agent inside the structure, and a diffusion sheet on the incident side of the light control member. And / or a method of providing them on the exit side, such as! /, Is a combination of these.
  • Random irregularities can be formed by applying a solution in which fine particles are dispersed to the main surface or by transferring from a mold having irregularities.
  • These are light sources for light control members Can be provided on the side and / or on the exit surface side.
  • the degree of unevenness is preferably such that the arithmetic average roughness Ra is 3 in or less. If it is larger than this, the diffusion effect will be too great and the front brightness will decrease.
  • the incident surface is flat, light incident from various directions When entering the light control member, the light is condensed near the front to some extent due to refraction at the incident surface. Increase. For example, when the refractive index of the light control member is 1.55, the light is collected in an angle range within 40 degrees from the normal direction of the incident surface.
  • the light incident on the light control member is refracted at a wide angle and proceeds, so that the effect of increasing the light emission ratio in the front direction may be reduced.
  • the projection surface is provided with fine irregularities, the effect of increasing the light emission ratio in the front direction by the irregularities may be reduced due to refraction on the irregular surface. It is possible to adjust to a range suitable for the intended use from the balance between the obtained diffusibility and brightness unevenness elimination effect and front brightness.
  • the light diffusing agent When the light diffusing agent is applied, it is more preferable to apply the light diffusing agent to the emission surface side.
  • the light diffusing agent inorganic fine particles and crosslinked organic fine particles used in conventional light diffusing plates and diffusing sheets can be used. Compared to conventional light diffusion plates, the amount used is very small and the same or better diffusivity is obtained, and the transmittance is also very high.
  • the height of the hook-shaped convex portions of the first light direction control means and the second light direction control means is preferably 111 m to 500 111. If it exceeds 500 m, it will be easier to see the ridges when observing the exit surface, leading to a reduction in quality. On the other hand, when it is smaller than l ⁇ m, coloring occurs due to the diffraction phenomenon of light, and the quality deteriorates.
  • the width of the ridge-shaped convex portion in the height direction in the second light beam direction control means is the height direction of the liquid crystal. It is preferably 1/100 to 1 / 1.5 of the pixel pitch. If it is larger than this, moire occurs due to the relationship between the second light direction control member and the liquid crystal panel, and the image quality is greatly reduced.
  • random irregularities such as embossing are provided on the main surface of the plate-like member.
  • Random irregularities can be formed by applying a solution in which fine particles are dispersed to the main surface or transferring from a mold having irregularities. These can be provided on the light source side and / or the exit surface side of the light control member.
  • the degree of unevenness is preferably such that the arithmetic average roughness Ra is 3 111 or less. If it is larger than this, the diffusion effect will be too great, and the front luminance will decrease.
  • the incident surface When the incident surface is flat, light incident from various directions is condensed near the front to some extent due to refraction at the incident surface when entering the light control member. Will increase.
  • the refractive index of the light control member when the refractive index of the light control member is 1.55, the light is focused in an angle range within 40 degrees with the normal direction of the incident surface.
  • unevenness is given to the incident surface, the light incident on the light control member is refracted and travels at a wide angle, which may reduce the effect of increasing the light emission ratio in the front direction.
  • fine irregularities are provided on the exit surface, the effect of increasing the light emission ratio in the front direction due to the irregularities may be reduced due to refraction on the irregular surface.
  • the power S can be adjusted to a range suitable for the intended use from the balance between the obtained diffusibility, brightness unevenness elimination effect and front brightness.
  • a material usually used as a base material of an optical member can be preferably used, and a translucent thermoplastic resin is usually used.
  • a translucent thermoplastic resin is usually used.
  • acrylic resin (meth) acrylic resin, (meth) acryl styrene copolymer resin, styrene resin, aromatic bulle resin, olefin resin, ethylene acetate bur copolymer resin, chlorinated bur resin, burester resin
  • the light diffusing agent is dispersed in the structure as the diffusing means, there is no particular limitation, but the light diffusing agent is preferably 0.0 with respect to 100 parts by mass of the transparent resin; ! ⁇ 20 parts by mass, more preferably 0.;! ⁇ 15 parts by mass, more preferably 0.3 ⁇ ; 10 parts by mass.
  • the amount is less than 0.01 parts by mass, the light diffusibility is not sufficient, and if it exceeds 20 parts by mass, sufficient total light transmittance is obtained. In some cases, the strength may not be sufficient.
  • the particle size of the light diffusing agent is more preferably in the range of 2 to 20 m, preferably the average particle size is in the range of ! to 30, 1 m.
  • the average particle size of the light diffusing agent is smaller than 11 11 m, the light diffusing resin composition obtained by dispersing the light diffusing agent in the transparent resin selectively scatters short-wavelength light. The light is yellowish and not preferred.
  • the average particle size of the light diffusing agent exceeds SO ⁇ m, the light diffusing resin composition obtained by dispersing in the transparent resin has reduced light diffusibility or light has passed through the resin. Sometimes the light diffusing agent may be easily observed as a foreign substance, which is not preferable.
  • the shape of the light diffusing agent is more preferably an oval or spherical shape, more preferably a spherical shape.
  • the light diffusing agent usually, inorganic and / or organic transparent fine particles having a refractive index different from that of the transparent resin of the base material are used.
  • the absolute value is preferably 0.02 or more from the viewpoint of light diffusibility, and it is preferably 0.15 or less. It is preferable from the viewpoint of permeability.
  • the present invention by providing a difference in refractive index between the light diffusing agent and the substrate as described above, so-called internal diffusion can be imparted, but the light diffusing agent is raised on the surface of the substrate. Thus, by forming surface irregularities, so-called external diffusion can be imparted.
  • Examples of the inorganic light diffusing agent include calcium carbonate, barium sulfate, titanium oxide, aluminum hydroxide, silica, glass, talc, my strength, white carbon, magnesium oxide, and zinc oxide. These may be subjected to surface treatment with a fatty acid or the like.
  • Examples of the organic light diffusing agent include styrene polymer particles, acrylic polymer particles, siloxane polymer particles, fluorine polymer particles, and the like, and a 3% by mass reduction temperature in air.
  • a high heat-resistant light diffusing agent having a temperature of 250 ° C. or higher or a crosslinked polymer particle having a gel fraction of 10% or higher when dissolved in acetone is preferably used.
  • the first light direction control means, the second light direction control means or the diffusing means is a plate-like member, and is further arranged on the linear light source side! More preferred to be wood! Since the member on the side of the linear light source is a plate-like member, the mechanical strength is increased, and deterioration of optical characteristics due to warpage or the like can be prevented.
  • the thickness of the plate-like member is preferably 0.8 to 10mm, more preferably;! ⁇ 5mm.
  • the reflecting plate 6 By disposing the reflecting plate 6 on the side opposite to the emission side of the linear light source (back side), the light traveling from the linear light source 1 to the back side, the first light direction control means, and the second light direction control means Since the light is reflected and reflected on the back surface, and the reflected light is further reflected on the exit side, the light can be used effectively and the light utilization efficiency is increased.
  • the reflectance of the reflector 6 arranged in parallel on the back surface in the width direction and the height direction is 95% or more.
  • the material of the reflecting plate include metal foils such as aluminum, silver, and stainless steel, white coating, and foamed PET resin.
  • a reflector having a high reflectivity is preferable for improving the light utilization efficiency. From this viewpoint, silver, foamed PET resin and the like are preferable.
  • a material that diffuses and reflects light is preferred for improving the uniformity of the emitted light. From this point of view, foamed PET resin is preferred.
  • a light diffusion sheet having a light diffusion function may be provided on the incident surface side and / or the emission surface side of the first light beam direction control means, and on the incident surface side and / or the emission surface side of the second light beam means.
  • a more uniform front luminance distribution can be obtained by diffusion using the light diffusion sheet.
  • the image display device of the present invention is realized by a method such as using a transmissive liquid crystal display element on a lighting device, and is not particularly limited.
  • a transmissive display device a transmissive liquid crystal panel is used.
  • an image display device excellent in luminance uniformity on the display surface can be obtained.
  • T die T die, lip width 1000mm, lip spacing 5mm.
  • Roll 3 polishing rolls, vertical type.
  • the light diffusing plate used as the diffusing means between the linear light source and the first light beam direction control means was produced as follows.
  • Metatarylstyrene copolymer resin pellets (TX-800S: manufactured by Denki Kagaku Kogyo Co., Ltd., refractive index: 1.549)) and siloxane polymer particles (Tospearl 120: manufactured by GE Toshiba Silicon Co., Ltd.) refractive index: 1. 420) 1. after mixed-0 wt% and ultraviolet ray absorption agent 2- (5-methylcarbamoyl Honoré one 2-hydroxyphenyl) Henschel mixer and benzotriazole 0.1 mass 0/0, extrusion A light diffusion plate (P-1) having a width of 1000 mm and a thickness of 2 mm was obtained at an extrusion resin temperature of 235 ° C.
  • a member having a light beam direction control means characterized in that a flat surface is formed on the light incident surface and an elliptical shape is formed on the light output surface was produced as follows.
  • a female die having a cylindrical groove represented by the following formula was produced by cutting.
  • X is a coordinate orthogonal to the linear light source
  • y is the height from the bottom of the convex part.
  • the lens shape was symmetrical with respect to the mold surface, and the depth was constant within the surface.
  • a lens (B-1) having a light beam direction control means in which a lens shape is formed on the surface of a polycarbonate film having a thickness of 0.4 mm from a mold by using an ultraviolet curable resin, and a convex lens is formed. Obtained.
  • a member (B-2) having a light beam direction control means on which a convex lens was formed was bonded to one side of a light diffusion plate (P-2) obtained by extrusion molding.
  • the luminance and viewing angle of the molded specimen were measured by the following arrangement method using the following illumination device.
  • Illumination device The backlight device of a commercially available liquid crystal television set (Polyvision 27 "WLCD-TV N3272) was used. Measurement arrangement: Each member described in the examples and comparative examples described later was arranged in the illumination device and rotated. A luminance meter (BM-5A; manufactured by Topcon Corporation) was fixed at a position 500 mm away from the outermost surface (outgoing light side) of the member placed on the illumination device.
  • BM-5A manufactured by Topcon Corporation
  • the line connecting the center point of the illuminating device and the luminance meter was taken as the center line, the exit surface of the illuminating device was fixed in the direction perpendicular to the center line, and the angle was 0 degree.
  • the brightness of this state Measurement was taken as the center luminance.
  • the luminance value of the illuminating device was measured at intervals of 1 degree while rotating the rotary stage in the width direction of the illuminating device.
  • the half-value angle (width direction) is divided by the brightness value obtained at an angle of 0 degrees
  • the brightness value obtained at each measurement angle when the half-width angle (width direction) is rotated and scanned in the width direction is 1/2. Obtained as a measurement angle.
  • the luminance value of the illuminating device was measured at intervals of 1 degree while rotating the rotary stage in the height direction of the illuminating device. Then, the half-value angle (height direction) is 1/2 when the luminance value obtained at each measurement angle when rotated in the width direction is divided by the luminance value obtained at an angle of 0 degrees. Obtained as a measurement angle.
  • the luminance value at an angle of 0 degree on the outermost surface (outgoing light side) of the member arranged in the illuminating device was used and evaluated by symbols O, ⁇ , and X as follows.
  • Half-value angle (width direction) is 40 ° and / or Half-value angle (height direction) ⁇ 35 °
  • the viewing angle is narrow.
  • a backlight device of a commercially available liquid crystal television set (27-inch wide LCD—TV N3272 manufactured by Polyvision) was used as the illumination device of this example and the comparative example. That is, the light source C and the reflection plate D used in the backlight device were used as they were.
  • the configuration of the illumination device is shown in the schematic diagram of FIG. Details of the lighting device not shown are described below.
  • the length in the width direction was 620 mm
  • the length in the height direction was 355 mm
  • the length in the thickness direction perpendicular to the width direction and the height direction was 18 mm.
  • a white reflector 6 was provided so as to cover the bottom portion at a position facing the opening on the emission side of the backlight device.
  • the linear light source 1 is arranged in parallel with the reflecting plate with an interval of 2.5 mm on the exit side of the reflecting plate 6.
  • 16 cold-cathode tubes having a diameter of 3 mm and a length of 625 mm were arranged with the longitudinal direction parallel to the height direction and spaced by 24 mm along the width direction.
  • the diffusing means 2 (light diffusing plate) (P-1) obtained above is arranged on the light exit surface side of the backlight, and the diffusing means 5 (light diffusing sheet;
  • the first light direction control means 3 was disposed thereon.
  • a member (B-1) having a light beam direction control means on which a convex lens is formed is arranged so that the surface on which the convex lens is formed is opposite to the linear light source 1 side.
  • the longitudinal direction of the cold-cathode tube as the linear light source 1 and the convex lens ridge line are installed on the diffusing means 5 (light diffusing sheet) in a direction substantially perpendicular to the diffusing means 5.
  • the second light beam direction control means 4 is disposed thereon.
  • a member (B-1) having a light direction control means on which a convex lens is formed is opposite to the surface on which the convex lens is formed on the linear light source 1 side.
  • the longitudinal direction of the cold-cathode tube, which is the linear light source 1, and the convex lens ridge line are arranged on the first light beam direction control means 3 in a direction substantially parallel to the surface.
  • Table 1 shows the evaluation results.
  • First light direction control means arranged in a direction in which the longitudinal direction of the linear light source and the convex lens ridge line are substantially orthogonal to each other, and the longitudinal direction of the linear light source and the convex lens ridge Combined with a light beam diffusing plate (P-1) having a diffusing means between a linear light source and the first light beam direction control means in combination with a second light direction control member arranged in a direction in which the lines are substantially orthogonal
  • P-1 light beam diffusing plate having a diffusing means between a linear light source and the first light beam direction control means in combination with a second light direction control member arranged in a direction in which the lines are substantially orthogonal
  • the diffusing means 2 (light diffusing plate) (P-1) obtained above was placed on the exit surface side of the backlight.
  • the first light direction control means 3 was disposed thereon.
  • a member (B-1) having a light beam direction control means on which a convex lens is formed is arranged so that the surface on which the convex lens is formed is opposite to the linear light source 1 side.
  • the longitudinal direction of the cold-cathode tube, which is the linear light source 1, and the convex lens ridge line were installed on the diffusing means 2 (light diffusing plate) (P-1).
  • the second light beam direction control means 4 is disposed thereon.
  • a member (B-1) having a light direction control means on which a convex lens is formed is opposite to the surface on which the convex lens is formed on the linear light source 1 side.
  • the longitudinal direction of the cold-cathode tube, which is the linear light source 1, and the convex lens ridge line are arranged on the first light beam direction control means 3 in a direction substantially parallel to the surface.
  • Table 1 shows the evaluation results.
  • the first light beam direction control means arranged in the direction in which the longitudinal direction of the linear light source and the convex lens ridge line are substantially orthogonal to each other, and the second light beam direction control means arranged in the direction in which the longitudinal direction of the linear light source and the convex lens ridge line are substantially orthogonal.
  • a light direction control member and a light diffusing plate (P-1) having a diffusion means between the linear light source and the first light direction control means, the measured luminance is a high value, The half-value angle was wide and the light source image disappeared.
  • the diffusing means 2 (light diffusing plate) (P-2) obtained above is arranged on the light exit surface side of the backlight, and the diffusing means 5 (light diffusing sheet;
  • the first light direction control means 3 was disposed thereon.
  • the first light As the line direction control means 3, a member (B-1) having a light beam direction control means on which a convex lens is formed is directed so that the surface on which the convex lens is formed is directed opposite to the linear light source 1 side.
  • the longitudinal direction of the cold-cathode tube, which is the linear light source 1, and the convex lens ridge line were installed in a direction substantially orthogonal to each other.
  • the second light beam direction control means 4 is disposed thereon.
  • a member (B-1) having a light direction control means on which a convex lens is formed is opposite to the surface on which the convex lens is formed on the linear light source 1 side.
  • the longitudinal direction of the cold-cathode tube, which is the linear light source 1, and the convex lens ridge line are arranged on the first light beam direction control means 3 in a direction substantially parallel to the surface.
  • Table 1 shows the evaluation results.
  • the first light beam direction control means arranged in the direction in which the longitudinal direction of the linear light source and the convex lens ridge line are substantially orthogonal to each other, and the second light beam direction control means arranged in the direction in which the longitudinal direction of the linear light source and the convex lens ridge line are substantially orthogonal.
  • P-2 light diffusing plate
  • the diffusing means 2 (light diffusing plate) (P-3) obtained above was placed on the exit surface side of the backlight.
  • the first light direction control means 3 was disposed thereon.
  • a member (B-1) having a light beam direction control means on which a convex lens is formed is arranged so that the surface on which the convex lens is formed is opposite to the linear light source 1 side.
  • the longitudinal direction of the cold-cathode tube, which is the linear light source 1, and the convex lens ridge line were placed on the light diffusion plate 2 (P-3) in a direction substantially perpendicular to the light diffusion plate 2 (P-3).
  • the second light beam direction control means 4 is disposed thereon.
  • a member (B-1) having a light direction control means on which a convex lens is formed is opposite to the surface on which the convex lens is formed on the linear light source 1 side.
  • the longitudinal direction of the cold-cathode tube, which is the linear light source 1, and the convex lens ridge line are arranged on the first light beam direction control means 3 in a direction substantially parallel to the surface. Table 1 shows the evaluation results.
  • the first light beam direction control means arranged in the direction in which the longitudinal direction of the linear light source and the convex lens ridge line are substantially orthogonal to each other, and the second light beam direction control means arranged in the direction in which the longitudinal direction of the linear light source and the convex lens ridge line are substantially orthogonal.
  • the measured luminance is a high value, The half-value angle was wide and the light source image disappeared.
  • the diffusing means 2 (light diffusing plate) (P-1) obtained above was placed on the exit surface side of the backlight.
  • the first light beam direction control means 3 was disposed thereon.
  • a member (B-1) having a light beam direction control means on which a convex lens is formed is arranged so that the surface on which the convex lens is formed is opposite to the linear light source 1 side.
  • the longitudinal direction of the cold-cathode tube, which is the linear light source 1, and the convex lens ridge line were placed on the light diffusion plate 2 (P-1) in a direction substantially perpendicular to the light diffusion plate 2 (P-1).
  • a diffusion means 5 (light diffusion sheet; trade name “Opulse” BS-042) manufactured by Eiwa Co., Ltd.) was superimposed thereon.
  • the second light direction control means 4 is disposed thereon.
  • the second light beam direction control means 4 has a light beam direction control means on which a convex lens is formed.
  • the member (P-1) has a surface on which the convex lens is formed opposite to the linear light source 1 side.
  • the longitudinal direction of the cold-cathode tube, which is the linear light source 1, and the convex lens ridge line are placed on the light diffusion sheet 5 in a direction substantially parallel to the light diffusion sheet 5.
  • Table 1 shows the evaluation results.
  • the first light beam direction control means arranged in the direction in which the longitudinal direction of the linear light source and the convex lens ridge line are substantially orthogonal to each other, and the second light beam direction control means arranged in the direction in which the longitudinal direction of the linear light source and the convex lens ridge line are substantially orthogonal.
  • a light direction control means and a light diffusing plate (P-3) having a diffusion means between the linear light source and the first light direction control means, the measured luminance is sufficient for an illumination device.
  • the half-value angle was wide and the light source image disappeared.
  • Example 6 The member (B-2) having the first light beam direction control means 3 obtained as described above was arranged on the emission surface side of the backlight.
  • a member (B-2) having a light direction control means on which a convex lens is formed is arranged so that the surface on which the convex lens is formed is opposite to the linear light source 1 side.
  • the longitudinal direction of the cold-cathode tube as the linear light source 1 and the convex lens ridge line were installed in a direction substantially orthogonal to each other.
  • the diffusion means 5 (light diffusion sheet; trade name “Opulse” BS-042, manufactured by Ewa Co., Ltd.) was overlaid thereon.
  • the second light beam direction control means 4 is disposed thereon.
  • a member (B-1) having a light direction control means on which a convex lens is formed is opposite to the surface on which the convex lens is formed on the linear light source 1 side.
  • the longitudinal direction of the cold-cathode tube, which is the linear light source 1, and the convex lens ridge line were placed on the light diffusion sheet 5 in a direction substantially parallel to the light diffusion sheet 5.
  • Table 1 shows the evaluation results.
  • the first light beam direction control means arranged in the direction in which the longitudinal direction of the linear light source and the convex lens ridge line are substantially orthogonal to each other, and the second light beam direction control means arranged in the direction in which the longitudinal direction of the linear light source and the convex lens ridge line are substantially orthogonal.
  • the measured luminance had a sufficient value as a lighting device, the half-value angle was wide, and the light source image disappeared.
  • the diffusing means 2 (light diffusing plate) (P-1) obtained above is placed on the exit surface side of the backlight, and as shown in FIG. 6, the diffusing means 5 (light diffusing sheet; Eiwa) The product name "Opulse” BS-042) manufactured by Co., Ltd. was overlaid.
  • the first light direction control means 3 was disposed thereon.
  • a member (B-1) having a light beam direction control means on which a convex lens is formed is arranged so that the surface on which the convex lens is formed is opposite to the linear light source 1 side.
  • the longitudinal direction of the cold-cathode tube, which is the linear light source 1, and the convex lens ridge line are installed on the light diffusion sheet 5 in a direction substantially perpendicular to the light diffusion sheet 5.
  • Table 1 shows the evaluation results.
  • a light diffusing plate (P-1) having a diffusing means in between When combined with a light diffusing plate (P-1) having a diffusing means in between, the half-value angle was narrow and the light source image was visible, which was not preferable as a lighting device.
  • the diffusing means 2 (light diffusing plate) (P-1) obtained above is placed on the exit surface side of the backlight, and as shown in FIG. 7, the diffusing means 5 (light diffusing sheet; Eiwa)
  • the product name "Opulse” BS-042) manufactured by Co., Ltd. was overlaid.
  • the second light direction control means 4 was disposed thereon.
  • the second light beam direction control means 4 has a light beam direction control means on which a convex lens is formed.
  • the member (B-1) is arranged so that the surface on which the convex lens is formed is opposite to the linear light source 1 side.
  • the longitudinal direction of the cold-cathode tube, which is the linear light source 1, and the convex lens ridge line are placed on the light diffusion sheet 5 in a direction substantially parallel to the light diffusion sheet 5.
  • Table 1 shows the evaluation results. Light diffusion having a diffusing means between the second light source direction control means arranged in a direction in which the longitudinal direction of the linear light source and the convex lens ridge line are substantially parallel, and the linear light source and the second light direction control means. In combination with the plate (P-1), the measured luminance was lowered, which was not preferable as a lighting device.
  • the diffusing means 2 (light diffusing plate) (P-1) obtained above is placed on the light exit surface side of the backlight, and as shown in FIG. 8, the diffusing means 5 (light diffusing sheet; Eiwa)
  • the product name "Opulse” BS-042) manufactured by Co., Ltd. was overlaid.
  • the first light direction control means 3 was disposed thereon.
  • a member (B-1) having a light beam direction control means on which a convex lens is formed is arranged so that the surface on which the convex lens is formed is opposite to the linear light source 1 side.
  • the longitudinal direction of the cold-cathode tube, which is the linear light source 1, and the convex lens ridge line are installed on the light diffusion sheet 5 in a direction substantially perpendicular to the light diffusion sheet 5.
  • a member having the second first light direction control means 3 is arranged thereon.
  • a member having a light beam direction control means (B-1) having a convex lens formed as the first light beam direction control means 3 is opposite to the surface on which the convex lens is formed.
  • the cold-cathode tube which is the linear light source 1 on the first light direction control means 3 Were installed in a direction in which the longitudinal direction of the lens and the convex lens ridge line were substantially orthogonal to each other.
  • Table 1 shows the evaluation results.
  • a combination of two first light beam direction control means arranged in a direction in which the longitudinal direction of the linear light source and the convex lens ridge line are substantially orthogonal to each other, and a diffusion means between the linear light source and the first light beam direction control means When combined with a light diffusing plate (P-1) having, the measured luminance was lowered, the half-value angle was narrow, and the light source image was visible, which was not preferable as a lighting device.
  • the diffusing means 2 (light diffusing plate) (P-1) obtained above is arranged on the light exit surface side of the backlight, and the diffusing means 5 (light diffusing sheet;
  • the second light direction control means 4 was disposed thereon.
  • the second light beam direction control means 4 has a light beam direction control means on which a convex lens is formed.
  • the member (B-1) is arranged so that the surface on which the convex lens is formed is opposite to the linear light source 1 side.
  • the longitudinal direction of the cold-cathode tube, which is the linear light source 1, and the convex lens ridge line are placed on the light diffusion sheet 5 in a direction substantially parallel to the light diffusion sheet 5.
  • a member having the second second light direction control means 4 is disposed thereon.
  • a member (B-1) having a light beam direction control means on which a convex lens is formed, and the surface on which the convex lens is formed is opposite to the linear light source 1 side.
  • the longitudinal direction of the cold-cathode tube, which is the linear light source 1, and the convex lens ridge line are placed on the second light beam direction control means 4 in a direction substantially parallel to the second light beam direction control means 4.
  • Table 1 shows the evaluation results.
  • Two second light direction control means arranged in a direction in which the longitudinal direction of the linear light source and the convex lens ridge line are substantially parallel are combined, and between the linear light source and the second light direction control means.
  • the measured luminance was lowered, which was not preferable as a lighting device.
  • moire caused by interference with the arrangement period of the convex portions of the two second light beam direction control means occurred.
  • the diffusing means 2 (light diffusing plate) (P-1) obtained above is connected to the exit surface of the backlight.
  • the diffusion means 5 (light diffusion sheet; trade name “Opulse” BS-042, manufactured by Ewa Co., Ltd.) was overlaid thereon.
  • the second light direction control means 4 was disposed thereon.
  • a member (B-1) having a light direction control means on which a convex lens is formed is opposite to the surface on which the convex lens is formed on the linear light source 1 side.
  • the longitudinal direction of the cold-cathode tube, which is the linear light source 1 and the convex lens ridge line were placed on the light diffusion sheet 5 in a direction substantially parallel to the light diffusion sheet 5.
  • a member having the first light beam direction control means 3 was disposed thereon.
  • a member (B-1) having a light direction control means on which a convex lens is formed is directed so that the surface on which the convex lens is formed is opposite to the linear light source 1 side.
  • the long light direction of the cold cathode tube, which is the linear light source 1, and the convex lens ridge line were installed on the second light beam direction control means 4 in a direction substantially orthogonal to each other.
  • Table 1 shows the evaluation results.
  • the first light beam direction control means disposed in a direction in which the longitudinal direction of the linear light source and the convex lens ridge line are substantially orthogonal to each other, and the first light beam direction control means disposed in a direction in which the longitudinal direction of the linear light source and the convex lens ridge line are substantially parallel.
  • the two light beam direction control members are combined so as to overlap with the embodiment, and when combined with a light diffusion plate (P-1) having a diffusion means between the linear light source and the first light beam direction control means
  • the half-value angle was not preferable as a narrow illumination device.
  • the diffusing means 2 (light diffusing plate) (P-1) obtained above was placed on the exit surface side of the backlight.
  • the second light direction control means 4 was disposed thereon.
  • a member (B-1) having a light direction control means on which a convex lens is formed is opposite to the surface on which the convex lens is formed on the linear light source 1 side.
  • the longitudinal direction of the cold-cathode tube, which is the linear light source 1, and the convex lens ridge line were placed on the light diffusing plate 2 (P-1) so as to be substantially parallel.
  • a member having the first light beam direction control means 3 was disposed thereon.
  • the first light direction control means 3 the light direction in which a convex lens is formed A cold cathode as the linear light source 1 on the second light direction control means 4 with the member (B-1) having the control means facing the surface on which the convex lens is formed opposite to the linear light source 1 side
  • the tube was installed in the direction in which the longitudinal direction of the tube and the convex lens ridge line were approximately orthogonal.
  • Table 1 shows the evaluation results.
  • the first light beam direction control means disposed in a direction in which the longitudinal direction of the linear light source and the convex lens ridge line are substantially orthogonal to each other, and the first light beam direction control means disposed in a direction in which the longitudinal direction of the linear light source and the convex lens ridge line are substantially parallel.
  • the two light beam direction control members are combined so as to overlap with the embodiment, and when combined with a light diffusion plate (P-1) having a diffusion means between the linear light source and the first light beam direction control means
  • the half-value angle was not preferable as a narrow illumination device.
  • the diffusing means 2 (light diffusing plate) (P-1) obtained above is placed on the exit surface side of the backlight, and as shown in FIG. 12, the diffusing means 5 (light diffusing sheet; Eiwa) The product name "Opulse” BS-042) manufactured by Co., Ltd. was overlaid.
  • the first light direction control means 3 was disposed thereon.
  • a prism sheet (trade name “BEFIII-10T” manufactured by 3M Co., Ltd.) is placed on the prism sheet so that the surface on which the prism is formed is opposite to the linear light source 1 side.
  • the light source 1 was installed in the direction in which the longitudinal direction of the cold-cathode tube and the convex lens ridge line were substantially orthogonal.
  • the second light direction control means 4 is arranged thereon.
  • the second light direction control means 4 a prism sheet (trade name “BE FIII-10T” manufactured by 3M Co., Ltd.) is placed so that the surface on which the prism is formed is opposite to the linear light source 1 side, and the first direction control is performed.
  • the longitudinal direction of the cold-cathode tube as the linear light source 1 and the convex lens ridge line were set in a direction substantially parallel to each other.
  • Table 1 shows the evaluation results.
  • a first light beam direction control means disposed in a direction in which the longitudinal direction of the linear light source and the prism ridge line are substantially orthogonal; a second light beam direction control member disposed in a direction in which the longitudinal direction of the linear light source and the prism ridge line are substantially parallel;
  • P-1 light diffusing plate having a diffusing means between the linear light source and the first light beam direction control means
  • the measured luminance was very high, but half-value The corner was not preferred as a very narrow lighting device.
  • the diffusing means 2 (light diffusing plate) (P-1) obtained above is placed on the exit surface side of the backlight, and as shown in FIG. 13, the diffusing means 5 (light diffusing sheet; Eiwa) Three pieces of product name "Opulse” BS-042) manufactured by Co., Ltd. were overlaid.
  • Table 1 shows the evaluation results. When the first beam direction control means and the second beam direction control member were not used, the measured luminance was very low, which was a preferable force for an illumination device.
  • Light source image -Shi o Light source image 'disappeared

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Abstract

L'objet de la présente invention est un dispositif d'éclairage qui présente une forte luminosité, en particulier une forte luminosité avant, qui présente un haut rendement d'utilisation optique, dont les dimensions sont faciles à agrandir, qui résout une luminosité irrégulière dans la direction avant sans alignement strict entre une source lumineuse et d'autres éléments, qui présente un grand angle de visibilité, et qui est avantageux en ce qui concerne la productivité et la faible épaisseur. Un angle de vision dans la direction de largeur est limité par un premier moyen de commande de direction de faisceau lumineux pour collecter l'énergie avant sur la direction avant et un angle dans la direction de hauteur est limité par un second moyen de commande de direction de faisceau lumineux disposé sur une surface saillante du premier moyen de commande de direction de faisceau lumineux pour collecter l'énergie avant sur la direction avant alors que, dans le même temps, l'angle de vision est élargi de façon appropriée dans la direction de largeur limitée par le premier moyen de commande de direction de faisceau lumineux, ce qui permet de résoudre le problème.
PCT/JP2007/070175 2006-10-17 2007-10-16 Dispositif d'éclairage et dispositif d'affichage d'image associé WO2008047794A1 (fr)

Priority Applications (1)

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JP2008539824A JPWO2008047794A1 (ja) 2006-10-17 2007-10-16 照明装置及びそれを用いた画像表示装置

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JP2010140889A (ja) * 2008-08-12 2010-06-24 Sumitomo Chemical Co Ltd 照明装置
JP2010210826A (ja) * 2009-03-09 2010-09-24 Asahi Kasei Corp 光線制御ユニット
EP2293139A1 (fr) 2009-08-01 2011-03-09 Bayer MaterialScience AG Unité d'éclairage multicouche doté de propriétés améliorées et son utilisation
WO2018193691A1 (fr) * 2017-04-21 2018-10-25 シャープ株式会社 Dispositif d'éclairage, dispositif d'affichage, et dispositif récepteur de télévision
JP2019046566A (ja) * 2017-08-30 2019-03-22 シャープ株式会社 照明装置、表示装置及びテレビ受信装置
JP2019200358A (ja) * 2018-05-17 2019-11-21 ミネベアミツミ株式会社 プリズムプレート及び光照射装置

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CN103838034A (zh) * 2014-02-07 2014-06-04 京东方科技集团股份有限公司 背光模组以及双视显示装置

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JPH11133214A (ja) * 1997-08-26 1999-05-21 Dainippon Printing Co Ltd 光学シート、光学シート積層体、面光源装置、及び、透過型表示装置
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JPH07151909A (ja) * 1993-11-29 1995-06-16 Dainippon Printing Co Ltd フィルムレンズ及びそれを用いた面光源
JPH11133214A (ja) * 1997-08-26 1999-05-21 Dainippon Printing Co Ltd 光学シート、光学シート積層体、面光源装置、及び、透過型表示装置
JP2005148095A (ja) * 2003-11-11 2005-06-09 Toppan Printing Co Ltd 光学シートとそれを用いたバックライトユニットおよびディスプレイ
WO2007049511A1 (fr) * 2005-10-28 2007-05-03 Hitachi Maxell, Ltd. Dispositif de rétroéclairage, dispositif d'affichage et élément optique

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JP2010140889A (ja) * 2008-08-12 2010-06-24 Sumitomo Chemical Co Ltd 照明装置
JP2010210826A (ja) * 2009-03-09 2010-09-24 Asahi Kasei Corp 光線制御ユニット
EP2293139A1 (fr) 2009-08-01 2011-03-09 Bayer MaterialScience AG Unité d'éclairage multicouche doté de propriétés améliorées et son utilisation
EP2293140A1 (fr) 2009-08-01 2011-03-09 Bayer MaterialScience AG Unité d'éclairage multicouche doté de propriétés améliorées et son utilisation
WO2018193691A1 (fr) * 2017-04-21 2018-10-25 シャープ株式会社 Dispositif d'éclairage, dispositif d'affichage, et dispositif récepteur de télévision
JP2019046566A (ja) * 2017-08-30 2019-03-22 シャープ株式会社 照明装置、表示装置及びテレビ受信装置
JP2019200358A (ja) * 2018-05-17 2019-11-21 ミネベアミツミ株式会社 プリズムプレート及び光照射装置
WO2019220870A1 (fr) * 2018-05-17 2019-11-21 ミネベアミツミ株式会社 Plaque de prisme et dispositif de projection de lumière

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