WO2011001750A1 - 照明装置、表示装置、及びテレビ受信装置 - Google Patents
照明装置、表示装置、及びテレビ受信装置 Download PDFInfo
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- WO2011001750A1 WO2011001750A1 PCT/JP2010/058285 JP2010058285W WO2011001750A1 WO 2011001750 A1 WO2011001750 A1 WO 2011001750A1 JP 2010058285 W JP2010058285 W JP 2010058285W WO 2011001750 A1 WO2011001750 A1 WO 2011001750A1
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- light source
- light
- region
- lighting device
- reflectance
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- 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
- G02F1/133603—Direct backlight with LEDs
-
- 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
- G02F1/133604—Direct backlight with lamps
-
- 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
- G02F1/133605—Direct backlight including specially adapted reflectors
-
- 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
- G02F1/133628—Illuminating devices with cooling means
Definitions
- the present invention relates to a lighting device, a display device, and a television receiver.
- a backlight device is separately required as a lighting device.
- This backlight device is well known to be installed on the back side of the liquid crystal panel (opposite the display surface), and is housed in the chassis as a lamp having an opening on the liquid crystal panel side surface.
- a large number of light sources for example, cold cathode tubes
- an optical member such as a diffusion plate
- the linear light is converted into planar light by an optical member, thereby making the illumination light uniform.
- an optical member thereby making the illumination light uniform.
- the conversion into the planar light is not sufficiently performed, a striped lamp image is generated along the arrangement of the light sources, and the display quality of the liquid crystal display device is deteriorated.
- the number of light sources to be arranged can be increased to reduce the distance between adjacent light sources, or the diffusion degree of the diffusion plate can be increased. desirable.
- increasing the number of light sources increases the cost of the backlight device and increases the power consumption.
- a backlight device disclosed in Patent Document 1 below is known as a backlight device that maintains luminance uniformity while suppressing power consumption.
- the backlight device described in Patent Document 1 includes a diffusion plate arranged in the light projecting direction of a plurality of light sources, and the diffusion plate has a total light transmittance (aperture ratio) of 62 to 71%, and A light control dot pattern having a haze value of 90 to 99% is printed.
- the dot diameter is large immediately above the light source, and the dot diameter decreases as the distance from the light source increases. According to such a configuration, the light emitted from the light source is efficiently used to irradiate light having a sufficient luminance value and uniform luminance without increasing the power consumption of the light source. It is supposed to be possible.
- an object of the present invention is to provide an illuminating device that realizes high brightness in an intended region such as the central portion of an irradiation surface. Moreover, an object of this invention is to provide the display apparatus provided with such an illuminating device, and also the television receiver provided with such a display apparatus.
- an illumination device has a light source, a chassis that houses the light source and has an opening for emitting the light, a shape that faces the light source and covers the opening.
- An optical member disposed in the chassis, and the chassis is formed with a light source arrangement area in which the light source is arranged and a light source non-arrangement area in which the light source is not arranged,
- a light source superimposing unit that overlaps with the light source arrangement region, and a light source non-superimposing unit that overlaps with the light source non-arrangement region, and the light source superimposing unit faces the light source as compared with the light source non-superimposing unit.
- the light reflectance on the surface is relatively large, and the light source overlapping portion has a low light reflection on the surface facing the light source that is relatively small compared to the surrounding area in the light source overlapping portion. Characterized by a rate domain
- the light emitted from the light source arranged in the light source arrangement region first reaches the light source superimposing portion having a relatively high light reflectivity among the optical members, so that most of the light is reflected. (That is, it is not transmitted), and the luminance of the illumination light is suppressed with respect to the amount of light emitted from the light source.
- the light reflected here may be reflected in the chassis and reach the light source non-arrangement region.
- the light source non-overlapping portion that overlaps the light source non-arranged region of the optical member has a relatively low light reflectance, so that more light is transmitted and the luminance of the predetermined illumination light can be obtained. .
- the light source superimposing portion having a relatively high light reflectance a large amount of light is reflected, so that the luminance is likely to be lowered.
- the luminance of a predetermined portion such as the central portion of the irradiation surface can be intentionally improved.
- the light source overlapping portion of the optical member is configured to form a low light reflectance region having a relatively small light reflectance as compared to the surrounding region in the light source overlapping portion. In the low light reflectance region, light from the light source is difficult to be reflected. Therefore, by arranging the low light reflectance region in a predetermined region, it is possible to achieve high brightness of the intended region.
- the low light reflectance region may be formed in a region including the center of the optical member. According to such a structure, it becomes possible to improve the brightness
- the light source may have a longitudinal shape, and the low light reflectance region may be formed in a longitudinal shape extending along the longitudinal direction of the light source. According to such a configuration, since the longitudinal direction of the low light reflectance region matches the longitudinal direction of the light source, light can be efficiently transmitted to the low light reflectance region.
- the low light reflectance region may be elliptical, and the long axis direction thereof may coincide with the longitudinal direction of the light source. In this manner, the low light reflectance region can be an ellipse whose major axis direction coincides with the longitudinal direction of the light source.
- a light reflecting portion that reflects light from the light source may be formed on at least a surface of the optical member that faces the light source in the light source superimposing portion.
- the light reflectance on the light source side surface of the optical member can be appropriately changed depending on the mode of the light reflecting portion.
- the said light reflection part shall be formed in the area
- the said light reflection part shall be comprised by the dot pattern provided with the light reflectivity.
- the degree of reflection can be controlled by the pattern mode (number (density), area, etc.), and the intended area can be easily brightened. It can be realized.
- the light reflecting portion may be formed such that the light reflectance on the surface of the optical member facing the light source gradually decreases gradually in a direction away from the light source.
- the said light reflection part shall be formed so that the light reflectivity in the surface facing the said light source of the said optical member may become small sequentially in the direction away from the said light source. .
- the brightness distribution of the illumination light can be made smooth by decreasing the light reflectance of the optical member in a gradation, more specifically, gradually gradually or stepwise.
- the area of the light source arrangement region may be smaller than the area of the light source non-arrangement region.
- the chassis has at least a portion facing the optical member, a first end, a second end located at an end opposite to the first end, the first end, and the second end.
- a central portion sandwiched between end portions, the central portion being the light source placement region, and the first end portion and the second end portion being the light source non-placement region. can do. In this way, sufficient luminance can be ensured in the central portion of the lighting device, and the luminance of the display central portion can be ensured even in a display device including the lighting device. Can be obtained.
- the optical member may be a light diffusing member that diffuses light from the light source.
- the light diffusing member in addition to controlling the light transmittance for each region in the optical member by the light reflectance distribution of the optical member, the light diffusing member can diffuse the light. Can be made more uniform.
- the light source may be a hot cathode tube. In this way, it is possible to increase the brightness.
- the light source may be a cold cathode tube. By doing so, it is possible to extend the life and to easily perform light control.
- the light source may include a plurality of LEDs arranged in parallel. In this way, it is possible to extend the life and reduce power consumption.
- a display device of the present invention includes the above-described lighting device and a display panel that performs display using light from the lighting device. According to such a display device, since it is possible to increase the brightness of an intended region such as the central portion in the lighting device, it is possible to realize a good display in which the central portion is also brightened in the display device. It becomes possible.
- a liquid crystal panel can be exemplified as the display panel.
- Such a display device can be applied as a liquid crystal display device to various uses such as a display of a television or a personal computer, and is particularly suitable for a large screen.
- the television receiver of this invention is provided with the said display apparatus. According to such a television receiver, it is possible to provide a device with excellent visibility.
- the lighting device of the present invention it is possible to increase the brightness of an intended region. Further, according to the display device of the present invention, since such an illumination device is provided, for example, the central portion of the display screen can be increased in brightness, and the visibility can be improved. Further, according to the television receiver of the present invention, since such a display device is provided, it is possible to provide a device with excellent visibility.
- FIG. 1 is an exploded perspective view showing a schematic configuration of a television receiver according to Embodiment 1 of the present invention.
- the exploded perspective view which shows schematic structure of the liquid crystal display device with which a television receiver is equipped Sectional drawing which shows the cross-sectional structure along the short side direction of a liquid crystal display device Sectional drawing which shows the cross-sectional structure along the long side direction of a liquid crystal display device.
- the top view which shows schematic structure of the chassis with which a liquid crystal display device is equipped
- the schematic diagram which shows the arrangement
- the schematic diagram which shows the arrangement
- FIG. 8 is a graph showing a change in light reflectance at the AA line of the diffusion plate of FIG.
- FIG. 8 is a graph showing a change in light reflectance at the BB line of the diffusion plate of FIG.
- FIG. 11 is a graph showing a change in light reflectance at line CC of the diffusion plate of FIG.
- FIG. 7 is an exploded perspective view showing a schematic configuration of a liquid crystal display device according to Embodiment 3 of the present invention.
- the schematic plan view of the chassis which shows the arrangement
- Schematic diagram showing a variation of the arrangement of LED light sources Schematic diagram showing a variation of different arrangement of LED light sources
- the television receiver TV including the liquid crystal display device 10
- the television receiver TV includes a liquid crystal display device 10, front and back cabinets Ca and Cb that are accommodated so as to sandwich the liquid crystal display device 10, a power source P, a tuner T, And a stand S.
- the liquid crystal display device (display device) 10 has a horizontally long rectangular shape as a whole and is accommodated in a vertically placed state.
- the liquid crystal display device 10 includes a liquid crystal panel 11 that is a display panel and a backlight device (illumination device) 12 that is an external light source, which are integrated by a frame-like bezel 13 or the like. Is supposed to be retained.
- the liquid crystal panel 11 and the backlight device 12 constituting the liquid crystal display device 10 will be described (see FIGS. 2 to 4).
- the liquid crystal panel (display panel) 11 is configured such that a pair of glass substrates are bonded together with a predetermined gap therebetween, and liquid crystal is sealed between the glass substrates.
- One glass substrate is provided with a switching element (for example, TFT) connected to a source wiring and a gate wiring orthogonal to each other, a pixel electrode connected to the switching element, an alignment film, and the like.
- the substrate is provided with a color filter and counter electrodes in which colored portions such as R (red), G (green), and B (blue) are arranged in a predetermined arrangement, and an alignment film.
- polarizing plates 11a and 11b are disposed outside both substrates (see FIGS. 3 and 4).
- the backlight device 12 covers the chassis 14 having a substantially box shape having an opening 14 b on the light emitting surface side (the liquid crystal panel 11 side), and the opening 14 b of the chassis 14.
- a frame 16 that holds the long side edge portion of the diffusion plate 15a with the chassis 14 therebetween.
- a hot cathode tube (light source) 17 for attaching the hot cathode tube 17 to the chassis 14, and a relay for relaying electrical connection at each end of the hot cathode tube 17.
- a connector 19 and a holder 20 that collectively covers the end of the hot cathode tube 17 and the relay connector 19 are provided.
- the diffusion plate 15 a side is the light emission side from the hot cathode tube 17.
- the chassis 14 is made of metal, and as shown in FIGS. 3 and 4, a rectangular bottom plate 30, and a folded outer edge portion 21 that rises from each side and is folded back in a substantially U shape (folded outer edge in the short side direction).
- a sheet metal is formed into a shallow substantially box shape including a portion 21a and a folded outer edge portion 21b) in the long side direction.
- the bottom plate 30 of the chassis 14 has a plurality of attachment holes 22 for attaching the relay connector 19 to both ends in the long side direction.
- a fixing hole 14c is formed in the upper surface of the folded outer edge portion 21b of the chassis 14, and the bezel 13, the frame 16, the chassis 14 and the like are integrated with, for example, screws. Is possible.
- a reflection sheet 23 is disposed on the inner surface side of the bottom plate 30 of the chassis 14 (the surface side facing the hot cathode tube 17).
- the reflection sheet 23 is made of synthetic resin, and the surface thereof is white with excellent light reflectivity.
- the reflection sheet 23 is laid so as to cover almost the entire area along the inner surface of the bottom plate 30 of the chassis 14. As shown in FIG. 4, the long side edge portion of the reflection sheet 23 rises so as to cover the folded outer edge portion 21b of the chassis 14 and is sandwiched between the chassis 14 and the diffusion plate 15a. By this reflection sheet 23, it is possible to reflect the light emitted from the hot cathode tube 17 toward the diffusion plate 15a.
- One hot cathode tube 17 is accommodated in the chassis 14 with its longitudinal direction (axial direction) coinciding with the long side direction of the chassis 14. More specifically, as shown in FIG. 5, the bottom plate 30 of the chassis 14 (the portion facing the diffusion plate 15a) is opposite to the first end 30A in the short side direction and the first end 30A. When divided into a second end portion 30B located at the end portion on the side and a central portion 30C sandwiched between them, the hot cathode tube 17 is disposed in the central portion 30C of the bottom plate 30, and the light source arrangement region LA is provided here. Is formed.
- the hot cathode tube 17 is not disposed at the first end 30A and the second end 30B of the bottom plate 30, and a light source non-arrangement region LN is formed here. That is, the hot-cathode tube 17 forms the light source arrangement area LA so as to be unevenly distributed in the central portion of the bottom plate 30 of the chassis 14 in the short side direction.
- the area of the light source arrangement area LA is the area of the light source non-arrangement area LN It is supposed to be smaller than that.
- the ratio of the area of the light source arrangement area LA to the area of the bottom plate 30 of the chassis 14 may vary depending on the number of the hot cathode tubes 17, but it is in the range of 4% to 37% from the viewpoint of saving power and ensuring luminance. In this embodiment, it is set to 4%.
- FIGS. 3 and 4 on the outer surface side of the bottom plate 30 of the chassis 14 (the side opposite to the side where the hot cathode tube 17 is disposed), more specifically, at a position overlapping the light source arrangement area LA.
- An inverter board 29 is attached at a position overlapping the end of the hot cathode tube 17, and drive power is supplied from the inverter board 29 to the hot cathode tube 17.
- Each end of the hot cathode tube 17 is provided with a terminal (not shown) for receiving driving power, and the terminal and a harness 29a (see FIG. 4) extending from the inverter board 29 are electrically connected. It is possible to supply high-voltage driving power.
- Such electrical connection is formed in the relay connector 19 into which the end of the hot cathode tube 17 is fitted, and a holder 20 is attached so as to cover the relay connector 19.
- the holder 20 that covers the end of the hot cathode tube 17 and the relay connector 19 is made of a white synthetic resin, and has a long and narrow box shape extending along the short side direction of the chassis 14 as shown in FIG. Yes.
- the holder 20 has a stepped surface on which the diffusion plate 15 a or the liquid crystal panel 11 can be placed in a stepwise manner, and is flush with the folded outer edge portion 21 a in the short side direction of the chassis 14. They are arranged in a state where the portions overlap each other, and constitute the side wall of the backlight device 12 together with the folded outer edge portion 21a.
- An insertion pin 24 protrudes from a surface of the holder 20 facing the folded outer edge portion 21a of the chassis 14, and the insertion pin 24 is inserted into an insertion hole 25 formed on the upper surface of the folded outer edge portion 21a of the chassis 14.
- the holder 20 is attached to the chassis 14.
- the stepped surface of the holder 20 covering the end portion of the hot cathode tube 17 is composed of three surfaces parallel to the bottom plate 30 of the chassis 14, and the short side edge of the diffusion plate 15 a is formed on the first surface 20 a at the lowest position. It is placed. Further, an inclined cover 26 that extends toward the bottom plate 30 of the chassis 14 extends from the first surface 20a. The short side edge portion of the liquid crystal panel 11 is placed on the second surface 20 b of the stepped surface of the holder 20. The third surface 20 c at the highest position among the stepped surfaces of the holder 20 is arranged at a position overlapping the folded outer edge portion 21 a of the chassis 14 and is in contact with the bezel 13.
- an optical sheet group 15 including a diffusion plate (optical member, light diffusion member) 15a and an optical sheet 15b is disposed on the opening 14b side of the chassis 14.
- the diffusion plate 15a is formed by dispersing and scattering light scattering particles in a synthetic resin plate-like member, and has a function of diffusing linear light emitted from the hot cathode tube 17 serving as a linear light source. It also has a light reflecting function for reflecting the light emitted from the tube 17.
- the short side edge portion of the diffusion plate 15a is placed on the first surface 20a of the holder 20, and is not subjected to vertical restraining force. In this way, the diffusion plate 15 a covers the opening 14 b of the chassis 14.
- the optical sheet 15b disposed on the diffusion plate 15a is a laminate of a diffusion sheet, a lens sheet, and a reflective polarizing plate in order from the diffusion plate 15a side.
- the optical sheet 15b is emitted from the hot cathode tube 17 and passes through the diffusion plate 15a. It has a function of converting the light that has passed through into planar light.
- the liquid crystal panel 11 is installed on the upper surface side of the optical sheet 15 b, and the optical sheet 15 b is sandwiched between the diffusion plate 15 a and the liquid crystal panel 11.
- FIG. 6 is a schematic diagram showing an arrangement mode of the light reflecting portion formed on the end side of the diffuser plate
- FIG. 7 is a schematic diagram showing an arrangement mode of the light reflecting portion formed on the center side of the diffuser plate.
- FIG. 8 is a plan view for explaining the distribution of light reflectance on the surface of the diffuser plate facing the hot cathode tube
- FIG. 9 is a graph showing the change in light reflectivity along the line AA of the diffuser plate in FIG.
- FIG. 10 is a graph showing a change in light reflectance at the BB line of the diffusion plate of FIG.
- the long side direction of the diffusion plate is the X-axis direction
- the short side direction is the Y-axis direction.
- the horizontal axis indicates the Y-axis direction (short-side direction), and the Y1-side end (indicated by A) from the Y-axis direction to the center, and the end from the center to the Y2 side (indicated by A). It is a graph in which the light reflectance up to display) is plotted. Further, in FIG.
- the horizontal axis indicates the X-axis direction (long-side direction), and the X1-side end (indicated by B) in the X-axis direction and the center, and the end from the center to the X2-side (in B It is a graph in which the light reflectance up to display) is plotted.
- a light reflecting portion 40 that forms a white dot pattern is formed on the diffusion plate 15 a on the surface facing the hot cathode tube 17.
- each dot of the light reflecting portion 40 has a round shape.
- the dot pattern of the light reflecting portion 40 is formed by printing, for example, a paste containing a metal oxide (such as titanium oxide) on the surface of the diffusion plate 15a.
- a paste containing a metal oxide such as titanium oxide
- the light reflecting portion 40 has a light reflectance in the surface facing the hot cathode tube 17 of 80%, and the light reflectance in the surface of the diffusion plate 15a itself is 30%.
- the light reflectance is relatively large.
- the light reflectance of each material is the average light reflectance within the measurement diameter measured by LAV (measurement diameter ⁇ 25.4 mm) of CM-3700d manufactured by Konica Minolta.
- the light reflectivity of the light reflecting portion 40 itself is a value obtained by forming the light reflecting portion 40 over the entire surface of the glass substrate and measuring the formation surface based on the measuring means.
- the light reflectivity of the light reflecting portion 40 itself is preferably 80% or more, and more preferably 90% or more.
- the diffuser plate 15 a has a distribution in which the light reflectance of the surface facing the hot cathode tube 17 varies from region to region, according to the change of the dot pattern of the light reflecting portion 40. That is, the diffuser plate 15a has a light reflectance of a portion (hereinafter referred to as a light source overlapping portion DA) that overlaps the light source arrangement area LA (a portion where the hot cathode tube 17 is disposed) on the surface facing the hot cathode tube 17.
- a light source overlapping portion DA a portion that overlaps the light source arrangement area LA (a portion where the hot cathode tube 17 is disposed) on the surface facing the hot cathode tube 17.
- a light source non-overlapping portion DN configured to have a larger light reflectance than a portion overlapping the light source non-arrangement region LN (a portion where the hot cathode tube 17 is not disposed) (hereinafter referred to as a light source non-overlapping portion DN). More specifically, as shown in FIGS. 8 and 9, in the light source overlapping portion DA of the diffusion plate 15a, the light reflectance is 50% as a whole, and the maximum light reflectance is shown in the diffusion plate 15a. . On the other hand, in the light source non-overlapping part DN of the diffuser plate 15a, the light reflectance gradually decreases gradually from the side closer to the light source overlapping part DA toward the side farther from the light source non-overlapping part DN.
- the light reflecting portion 40 is formed so that the light reflectance on the surface of the diffusion plate 15a facing the hot cathode tube 17 gradually decreases toward the direction away from the hot cathode tube 17. .
- the diffuser plate 15 a has a light reflectance that is relatively low in the light source overlapping portion DA compared to the surrounding region in the light source overlapping portion DA.
- the light reflectance region LR is included.
- the low light reflectance region LR is formed in a region including the center of the diffusion plate 15a, and has a longitudinal shape extending along the longitudinal direction of the hot cathode tube 17, more specifically, the major axis direction is the longitudinal direction of the hot cathode tube 17. It is supposed to form an ellipse that matches the direction.
- the light reflecting portion 40 is not formed as shown in FIG.
- the light reflection part 40 is formed in the area
- region LR is small compared with the light reflectance in the surrounding area
- the light reflectance of the light source overlapping portion DA is 50%, whereas the light reflectance of the low light reflectance region LR is 30%, and diffusion is performed. It is almost the same as the minimum value of the light reflectance of the entire plate 15a (light reflectance at both ends in the short side direction of the diffusion plate 15a).
- the light reflectance distribution of the diffusing plate 15a as described above is determined by the area of each dot of the light reflecting portion 40. That is, since the light reflectance of the light reflecting portion 40 itself is larger than the light reflectance of the diffusion plate 15a itself, if the area of the dots of the light reflecting portion 40 is relatively large, the light reflecting portion 40 The rate can be made relatively large, and the light reflectance can be made relatively small if the area of the dots of the light reflecting portion 40 is made relatively small.
- the diffuser plate 15a has a relatively large dot area of the light reflecting unit 40 in the light source overlapping part DA and is the same, and the boundary between the light source overlapping part DA and the light source non-overlapping part DN.
- the dot area of the light reflecting portion 40 is continuously reduced toward both end portions in the short side direction.
- the area of each dot of the light reflection part 40 is made the same, and it is good also as what changes the space
- the diffusion plate 15a includes the light source overlapping part DA that overlaps the light source arrangement area LA and the light source non-overlapping part DN that overlaps the light source non-arrangement area LN.
- the light source overlapping portion DA has a relatively high light reflectance on the surface facing the hot cathode tube 17 as compared with the light source non-superimposing portion DN.
- the light source overlapping portion DA faces the hot cathode tube 17.
- region LR in which the light reflectance in the surface to perform is relatively small compared with the surrounding area
- the light emitted from the hot cathode tube 17 arranged in the light source arrangement area LA first reaches the light source overlapping part DA having a relatively large light reflectance in the diffusion plate 15a. Most of the light is reflected (that is, not transmitted), and the luminance of the illumination light is suppressed with respect to the amount of light emitted from the hot cathode tube 17.
- the light reflected here may be reflected in the chassis 14 and reach the light source non-arrangement region LN.
- the light source non-overlapping portion DN that overlaps with the light source non-arrangement region LN in the diffusion plate 15a has a relatively low light reflectance, so that more light is transmitted and the luminance of the predetermined illumination light is obtained.
- the light source overlapping part DA having a relatively large light reflectance a large amount of light is reflected, so that the brightness is likely to be lowered.
- the brightness of a predetermined portion such as the central part of the irradiation surface is intentionally improved. Is difficult. Therefore, in the present embodiment, the light source overlapping portion DA of the diffusion plate 15a is configured to form a low light reflectance region LR having a relatively low light reflectance compared to the surrounding region in the light source overlapping portion DA. .
- the low light reflectivity region LR In the low light reflectivity region LR, the light from the hot cathode tube 17 is difficult to be reflected. Therefore, by arranging the low light reflectivity region LR in a predetermined region, it is possible to achieve high brightness in the intended region. It becomes possible.
- the low light reflectance region LR is formed in a region including the center of the diffusion plate 15a. According to such a configuration, it is possible to improve the luminance of the central portion of the irradiation surface of the backlight device 12. Therefore, also in the liquid crystal display device 10 provided with the backlight device 12, the central portion of the display screen is increased in luminance. Since the human eye usually pays attention to the central portion of the display screen, the central portion of the display screen has high brightness, and thus it is possible to obtain good visibility.
- the low light reflectance region LR is formed in a longitudinal shape extending along the longitudinal direction of the hot cathode tube 17. According to such a configuration, since the longitudinal direction of the low light reflectance region LR and the longitudinal direction of the hot cathode tube 17 coincide with each other, light can be efficiently transmitted to the low light reflectance region LR. Become.
- the low light reflectance region LR has an elliptical shape, and the major axis direction thereof coincides with the longitudinal direction of the hot cathode tube 17. As described above, the low light reflectance region LR may be elliptical.
- a light reflecting portion 40 that reflects light from the hot cathode tube 17 is formed on at least a surface of the diffusion plate 15a facing the hot cathode tube 17 in the light source overlapping portion DA.
- the light reflectance on the surface of the diffusion plate 15a on the hot cathode tube 17 side can be appropriately changed depending on the mode of the light reflecting portion 40.
- the light reflecting portion 40 is formed in a region excluding the low light reflectance region LR in the diffusion plate 15a. According to such a configuration, it is possible to secure a sufficient amount of transmitted light in the low light reflectance region LR, and it is possible to further increase the luminance in the light reflectance region LR.
- the light reflecting portion 40 is configured by a dot pattern having light reflectivity.
- the degree of reflection can be controlled by the pattern mode (number (density), area, etc.), and the intended area can be easily brightened. Can be realized.
- the light reflecting portion 40 is formed so that the light reflectance on the surface of the diffusion plate 15a facing the hot cathode tube 17 becomes gradually smaller toward the direction away from the hot cathode tube 17.
- the brightness distribution of the illumination light can be made smooth by decreasing the light reflectance of the diffuser plate 15a in a gradation manner, more specifically, continuously and gradually.
- the area of the light source arrangement area LA is smaller than the area of the light source non-arrangement area LN.
- the area of the light source arrangement region LA is smaller than the area of the light source non-arrangement region LN.
- the chassis 14 has at least a portion facing the diffusion plate 15a at the first end 30A and the second end 30B located at the end opposite to the first end 30A,
- the first end portion 30A and the second end portion 30B are divided into a central portion 30C.
- the central portion 30C is a light source arrangement area LA, while the first end portion 30A and the second end portion 30B are divided.
- the light source non-arrangement region LN is used. In this way, sufficient luminance can be secured in the central portion of the backlight device 12, and the luminance of the display central portion can be secured also in the liquid crystal display device 10 including the backlight device 12. Therefore, good visibility can be obtained.
- the diffusion plate 15a is a light diffusion member that diffuses light from the hot cathode tube 17.
- the light diffuser can be diffused by the light diffusing member in addition to controlling the light transmittance for each region in the diffusing plate 15a by the light reflectance distribution of the diffusing plate 15a.
- the in-plane luminance at can be made more uniform.
- the hot cathode tube 17 as a light source, it is possible to achieve high brightness.
- FIG. 11 is a schematic diagram showing the arrangement of the light reflecting portions formed on the diffusion plate according to this modification
- FIG. 12 is a graph showing the change in the light reflectance at the line CC of the diffusion plate of FIG.
- the long side direction of the diffusion plate is the X-axis direction
- the short side direction is the Y-axis direction.
- the horizontal axis indicates the Y-axis direction (short-side direction), and the Y1-side end (indicated by C) from the Y-axis direction to the center, and the Y-side end from the center (indicated by C It is a graph in which the light reflectance up to display) is plotted.
- symbol is attached
- a low light reflectance region LR-1 is formed on the surface of the diffusion plate 150a facing the hot cathode tube 17.
- a light reflecting portion 40 is formed as shown in FIG.
- the area of each dot of the light reflecting portion 40 formed in the low light reflectance region LR-1 is equal to the area of each dot of the light reflecting portion 40 formed in the region around the low light reflectance region LR-1. It is said that it is small compared.
- the light reflectance in the low light reflectance region LR-1 is smaller than the light reflectance in the surrounding region and is smaller than the minimum value of the light reflectance in the diffusion plate 150a. It is a large value.
- the light reflectance in the area around the low light reflectance area LR-1 is, for example, 50%, and the minimum value of the light reflectance in the diffusion plate 150a is, for example, 30%.
- the light reflectance in the low light reflectance region LR-1 is set to 35%, for example.
- the dots of the light reflecting portion 40 formed in the low light reflectivity region LR-1 have the same area, so that the light reflectivity in the low light reflectivity region LR-1 is the low light reflectivity.
- the reflectance region LR-1 is almost constant over the entire area.
- the light reflecting portion 40 is also provided in the low light reflectance region LR-1 of the diffusion plate 150a.
- the difference in the amount of transmitted light between the low light reflectance region LR-1 and the surrounding region can be suitably reduced by the aspect of the light reflecting portion 40 provided in the low light reflectance region LR-1. .
- FIG. 13 is a plan view showing a modification of the light reflectance distribution on the surface of the diffusion plate facing the hot cathode tube according to this modification
- FIG. 14 shows the light reflection at the DD line of the diffusion plate of FIG.
- FIG. 15 is a graph showing the change in the light reflectance at the EE line of the diffusion plate of FIG. 13 to 15, the long side direction of the diffusion plate is the X-axis direction, and the short side direction is the Y-axis direction.
- the horizontal axis indicates the Y-axis direction (short side direction), and the Y1-side end (indicated by D) in the Y-axis direction and the center, and the end from the center to the Y2 side (indicated by D It is a graph in which the light reflectance up to display) is plotted. Further, in FIG. 15, the horizontal axis indicates the Y-axis direction (short-side direction), and the Y1-side end (indicated by E) from the Y-axis direction to the center, and the end from the center to the Y2 side (indicated by E). It is a graph in which the light reflectance up to display) is plotted.
- symbol is attached
- the diffusion plate 250a has a light source overlapping portion DA (a portion overlapping with the hot cathode tube 17) having the highest light reflectance, while a light source non-overlapping portion DN (heat In the portion that does not overlap with the cathode tube 17), the light reflectance gradually decreases stepwise from the side closer to the light source overlapping portion DA toward the side farther from it. More specifically, as shown in FIG. 13, a first region 51 having a relatively high light reflectivity is formed in the light source overlapping portion DA located at the center of the diffuser plate 250 a and surrounds the first region 51. Thus, a second region 52 having a light reflectance that is relatively smaller than that of the first region 51 is formed.
- a third region 53 having a light reflectance that is relatively smaller than that of the second region 52 of the skull is formed so as to surround the second region 52, and relative to the third region so as to surround the third region 53.
- a fourth region 54 having a small light reflectance is formed.
- a fifth region 55 having a light reflectance that is relatively smaller than that of the fourth region is formed on the outer edge portion of the diffusion plate 250 a so as to surround the fourth region 54. That is, the light reflectance on the surface of the diffusion plate 250a facing the hot cathode tube 17 is gradually reduced in a direction away from the hot cathode tube 17.
- the light reflectance (light reflectance in the DD line) in the short side direction of the diffusion plate 250a is as shown in FIG.
- the first area 51 is 50%
- the second area 52 is 45%
- the third area 53 is 40%
- the fourth area 54 is 35%
- the fifth area 55 is 30%.
- the light reflectance is determined by changing the dot area of the light reflecting portion 40, and the light reflecting portion 40 is formed in the fifth region 55. In other words, it indicates the light reflectance of the diffusion plate 250a itself.
- a low light reflectance region LR is formed in a region including the center of the diffusion plate 250a.
- the light reflection part 40 is not formed in the low light reflectance region LR, and the light reflectance in the low light reflectance region LR indicates the light reflectance of the diffusion plate 250a itself.
- the light reflectance at the center of the diffuser plate 250a (light reflectivity at the EE line) is, as shown in FIG. 15, the ends in the short side direction of the diffuser plate 250a (Y1 end, Y2 end). 30%, and gradually increases from the end toward the center.
- the light reflectance is a small thing compared with the circumference
- the diffusion plate 250 a is formed with a plurality of regions 52, 53, 54, and 55 having different light reflectivities, and the light is emitted in the order of the second region 52 ⁇ the third region 53 ⁇ the fourth region 54 ⁇ the fifth region 55.
- the light reflectivity can be successively reduced stepwise from the side closer to the light source overlapping portion DA (the hot cathode tube 17) toward the far side.
- the luminance distribution of illumination light in the light source non-overlapping portion DN (light source non-arrangement region LN) can be made smooth, and as a result, a gentle illumination luminance distribution is realized as the entire backlight device 12. It becomes possible.
- the manufacturing method of the diffusion plate 250a becomes simple, which can contribute to cost reduction. Become.
- FIG. 16 is a plan view showing a schematic configuration of a chassis provided in the backlight device
- FIG. 18 is a schematic view showing an arrangement mode of light reflecting portions formed on a surface of the diffuser plate facing the cold cathode tube.
- the cold-cathode tube 70 has an elongated tubular shape with a diameter of 4.0 mm, and a large number (six in this case) are mutually connected in a state where the length direction (axial direction) coincides with the long side direction of the chassis 14. It is housed in a form that is unevenly distributed in the chassis 14 in a state of being arranged in parallel. More specifically, as shown in FIG. 16, the bottom plate 31 of the chassis 14 (the portion facing the diffusion plate 350a) is opposite to the first end 31A and the first end 31A in the short side direction.
- the cold cathode fluorescent lamp 70 is arranged at the central part 31C of the bottom plate 31 when divided equally into the second end part 31B located at the end part on the side and the central part 31C sandwiched between them. Region LA-1 is formed.
- the cold cathode tube 70 is not disposed at the first end portion 31A and the second end portion 31B of the bottom plate 31, and a light source non-arrangement region LN-1 is formed here. Note that the ratio of the area of the light source arrangement area LA-1 to the area of the bottom plate 31 of the chassis 14 may vary depending on the number of the cold cathode tubes 70, but 20% to 60% from the viewpoint of saving power and ensuring luminance. In this embodiment, it is 30%.
- the cold cathode tube 70 is held by a lamp clip (not shown) so that a slight gap is provided between the cold cathode tube 70 and the bottom plate 31 of the chassis 14. It is supported by. Further, a heat transfer member 71 is interposed in the gap so as to contact a part of the cold cathode tube 70 and the bottom plate 31. Through this heat transfer member 71, heat is transferred from the cold cathode tube 70, which has been heated at the time of lighting, to the chassis 14, and therefore, the temperature of the cold cathode tube 70 is lowered at the portion where the heat transfer member 71 is disposed, and forced. Thus, the coldest spot can be formed. As a result, it is possible to improve the luminance per one cold cathode tube 70 and contribute to power saving.
- the mountain-shaped reflecting portion 72 is made of synthetic resin, the surface thereof is white with excellent light reflectivity, the two inclined surfaces 72 a facing the cold cathode tube 70 and inclined toward the bottom plate 31, 72a.
- the mountain-shaped reflecting portion 72 has a longitudinal direction along the axial direction of the cold cathode tube 70 arranged in the light source arrangement region LA-1, and the light emitted from the cold cathode tube 70 is inclined by one angle.
- the surface 72a is directed toward the diffusion plate 350a.
- the inclined surface 72a of the mountain-shaped reflecting portion 72 can reflect the emitted light from the cold cathode fluorescent lamp 70 toward the diffusion plate 350a, so that the emitted light can be used effectively.
- a light reflecting portion 40 having a white dot pattern is formed on the surface of the diffusion plate 350 a facing the cold cathode tube 70.
- This dot pattern is formed by printing a paste containing a metal oxide (such as titanium oxide) excellent in light reflectivity on the surface of the diffusion plate 350a.
- the light reflecting portion 40 is formed in such a manner that the area of each dot is different for each region of the diffusion plate 350a. That is, in the short side direction of the diffuser plate 350a (the direction perpendicular to the longitudinal direction of the cold cathode tube 70, the Y-axis direction), the area of the dots of the light reflecting portion 40 is a portion overlapping the cold cathode tube 70 (hereinafter referred to as the light source).
- the light source non-superimposing portion DN-1 In a portion that is the largest in the superimposing portion DA-1 and does not overlap with the cold cathode tube 70 (hereinafter referred to as the light source non-superimposing portion DN-1), it is directed from the side closer to the light source overlapping portion DA-1 to the far side. Continuously smaller. Therefore, the light reflectance of the diffusion plate 350a is the highest in the light source superimposing part DA-1, and the light source non-superimposing part DN-1 is continuously small from the side closer to the light source superimposing part DA-1 to the side farther from it. It has become.
- an elliptical low light reflectance region LR is formed in a region including the center of the diffusion plate 350a.
- the light reflection part 40 is not formed in the low light reflectance region LR, and the light reflectance of the low light reflectance region LR is compared with the light reflectance of the surrounding region in the light source overlapping portion DA-1.
- the light reflectance of the low light reflectance region LR is the light reflectance of the diffusion plate 350a itself, and shows a minimum value in the diffusion plate 350a.
- the light emitted from the cold cathode tube 70 first reaches the light source overlapping part DA-1 of the diffusion plate 350a. Since this light source overlapping portion DA-1 has a high light reflectivity due to the formation of the light reflecting portion 40, much of the light that has arrived is reflected, and the amount of light emitted from the cold cathode tube 70 is reflected. Thus, the brightness of the illumination light is suppressed.
- the light reflected here may be reflected again in the chassis 14 and reach the light source non-overlapping portion DN-1. Since the light source non-overlapping portion DN-1 has a relatively small light reflectance, more light is transmitted, and the luminance of predetermined illumination light can be obtained.
- a substantially uniform illumination luminance distribution can be obtained for the entire backlight device 12.
- a low light reflectance region LR having a relatively small light reflectance compared to the surrounding region in the light source overlapping portion DA-1 is formed in the light source overlapping portion DA-1 of the diffusion plate 350a. It is configured to do. In the low light reflectivity region LR, light from the cold cathode fluorescent lamp 70 is not easily reflected. Therefore, by arranging the low light reflectivity region LR in a predetermined region, it is possible to achieve high brightness in the intended region. It becomes possible.
- the cold cathode tube 70 as a light source, it is possible to achieve a long life and to easily perform dimming.
- FIGS. 18 is an exploded perspective view showing a schematic configuration of the liquid crystal display device
- FIG. 19 is a schematic plan view of a chassis showing an arrangement mode of the LED light source
- FIG. 20 is a light reflection formed on a surface of the diffusion plate facing the LED light source. It is a schematic diagram which shows the arrangement
- an LED substrate 81 to which an LED light source (light source) 80 is attached is disposed on the inner surface side of the bottom plate 33 of the chassis 14.
- the LED substrate 81 includes a reflection sheet 82 laid on the light emission side surface, that is, the surface side facing the diffusion plate 450a, and an opening (see FIG. And a plurality of LED light sources 80 arranged so as to be exposed from (not shown).
- the LED light sources 80 are arranged in parallel so as to form a longitudinal shape along the long side direction of the bottom plate 33 of the chassis 14.
- the LED board 81 has a single-sheet specification with respect to the liquid crystal panel 11.
- the LED board 81 is divided into a plurality of parts, and the plurality of LED boards 81 are arranged in a plane. A thing may be adopted.
- the reflection sheet 82 disposed on the LED substrate 81 is made of synthetic resin, and the surface thereof is white with excellent light reflectivity, and the LED substrate 81 is almost excluding the portion where the LED light source 80 is disposed. It is laid to cover the whole area.
- the LED light source 80 emits white light.
- the LED light source 80 may have a configuration in which three types of LED chips of red, green, and blue are surface-mounted, or a configuration in which a blue LED chip and a yellow phosphor are combined. Good.
- the LED light source 80 is disposed at the center portion 33C of the bottom plate 33 of the chassis 14, thereby forming a light source arrangement region LA-2.
- the first end portion 33A and the second end portion 33B of the bottom plate 33 serve as a light source non-arrangement region LN-2 in which the LED light source 80 is not disposed.
- the LED light sources 80 are arranged in a hexagonal close-packed plane, and the distances between adjacent LED light sources 80 and 80 are all equal.
- a light reflecting portion 40 having a white dot pattern is formed as shown in FIG.
- This dot pattern is formed by printing a paste containing a metal oxide (titanium oxide or the like) excellent in light reflectivity on the surface of the diffusion plate 450a.
- the light reflecting portion 40 is formed in such a manner that the area of each dot is different for each region of the diffusion plate 450a. That is, in the part of the diffuser plate 450a that overlaps with the light source arrangement area LA-2 (hereinafter referred to as the light source overlapping part DA-2), the area of each dot of the light reflecting part 40 is relatively large.
- each dot of the light reflecting portion 40 is relatively small at a portion overlapping the light source non-arrangement region LN-2 (hereinafter referred to as a light source non-overlapping portion DN-2). More specifically, in the light source overlapping portion DA-2, the light reflecting portion 40 is formed in a form in which each dot is solidly applied without any gap over the entire portion overlapping the LED light source 80. In the light reflection part 40, in the light source non-overlapping part DN-2, the area of each dot is continuously reduced in the direction away from the light source overlapping part DA-2.
- an elliptical low light reflectance region LR is formed in a region including the center of the diffusion plate 450a.
- the light reflection part 40 is not formed in the low light reflectance region LR, and the light reflectance of the low light reflectance region LR is compared with the light reflectance of the surrounding region in the light source overlapping portion DA-2.
- the light reflectance of the low light reflectance region LR is the light reflectance of the diffusion plate 450a itself, and shows a minimum value in the diffusion plate 450a.
- the light emitted from the LED light source 80 first reaches the light source overlapping part DA-2 of the diffusion plate 450a. Since this light source overlapping part DA-2 has a high light reflectivity due to the formation of the light reflecting part 40, much of the light that has arrived is reflected, and the amount of light emitted from the LED light source 80 is reduced. The brightness of the illumination light is suppressed. On the other hand, the light reflected here may be reflected again in the chassis 14 and reach the light source non-overlapping portion DN-2. Since the light source non-overlapping portion DN-2 has a relatively low light reflectance, more light is transmitted, and the luminance of predetermined illumination light can be obtained.
- a substantially uniform illumination luminance distribution can be obtained for the entire backlight device 12.
- a low light reflectance region LR having a relatively small light reflectance is formed in the light source overlapping portion DA-2 of the diffusion plate 450a as compared with the surrounding region in the light source overlapping portion DA-2. It is configured to do. Since the light from the LED light source 80 is difficult to be reflected in the low light reflectance region LR, it is possible to increase the brightness of the intended region by arranging the low light reflectance region LR in a predetermined region. It becomes.
- the LED light source 80 in which the light sources are arranged in parallel, it is possible to extend the life and reduce the power consumption.
- a mode as shown in FIG. 21 or FIG. 22 may be adopted. That is, in the third embodiment, the LED light sources 80 are arranged so as to be in a hexagonal close-packed arrangement, in other words, the distances between the adjacent LED light sources 80 are all equal. However, as shown in FIG. Can also be arranged in a grid by aligning them vertically and horizontally. Alternatively, as shown in FIG. 22, although the LED light sources 80 are aligned in the vertical and horizontal directions, the positions of the LED light sources 80 may be staggered in adjacent rows.
- Embodiment 2 In Embodiment 2 described above, the configuration in which six cold cathode tubes are arranged is illustrated, but the number of cold cathode tubes can be changed as appropriate, such as four or eight.
- the present invention includes a type using a discharge tube (such as a mercury lamp) other than the fluorescent tube.
- Embodiment 3 an LED that is a kind of point light source is used as the light source.
- an LED that uses another type of point light source is also included in the present invention.
- a planar light source such as an organic EL can be used.
- each dot of the dot pattern constituting the light reflecting portion has a round shape, but the shape of each dot is not limited to this, and a polygonal shape such as a square shape or the like. Any shape can be selected.
- the light reflecting portion is formed on the surface of the diffuser plate facing the light source.
- the light reflecting portion is formed on the surface of the diffuser plate opposite to the light source. It is good.
- the configuration in which the light source arrangement area is formed at the center of the bottom plate of the chassis has been exemplified.
- the light source arrangement area is formed at the end of the bottom plate, or at the center and one end.
- the present invention includes a design in which the light source arrangement region is appropriately changed in accordance with the light amount of the light source, the use conditions of the backlight device, and the like.
- the low light reflectance region is elliptical, but the shape of the low light reflectance region is not limited to this, and may be any polygonal shape such as a quadrangle, for example. It can be a shape.
- a light reflecting portion is formed over substantially the entire diffusion plate, and the light reflectance is small compared to the surrounding region due to the presence or absence of the light reflecting portion or a change in area.
- the configuration in which the reflectance region is formed is illustrated, it is not always necessary to form the light reflecting portion on the diffusion plate.
- the light reflectance may be different for each region of the diffusion plate. It is good also as a structure made into a low light reflectance area
- SYMBOLS 10 Liquid crystal display device (display device), 11 ... Liquid crystal panel (display panel), 12 ... Backlight device (illumination device), 14 ... Chassis, 14b ... Opening part of chassis, 15a ... Diffusing plate (Optical member, Light scattering) Member), 17 ... hot cathode tube (light source), 30A ... first end portion of the bottom plate of the chassis, 30B ... second end portion of the bottom plate of the chassis, 30C ... central portion of the bottom plate of the chassis, 40 ... light reflecting portion, 70 ... Cold cathode tube (light source), 80 ... LED light source (light source), DA ... Light source superimposing part, DN ... Light source non-superimposing part, LA ... Light source arrangement area, LN ... Light source non-arrangement area, LR ... Low light reflectance area, TV ... TV receiver
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Abstract
Description
しかしながら、特許文献1に開示の装置では、光源の直上に大きな径のドットが形成されるため、光源からの光がドットにより反射され、光源の直上の輝度が低下し易い。ここで、例えば、光源がバックライト装置の中央部に置かれた場合には、照射面の中央部の輝度が低下し得ることとなる。当該バックライト装置が表示装置に用いられる場合、人間の目は、通常、表示画面の中央部に注意が注がれるため、当該中央部の輝度が小さいと、低輝度領域が目立ち易く、著しく視認性が低下するという課題がある。
上記課題を解決するために、本発明の照明装置は、光源と、前記光源を収容し、その光を出射するための開口部を有するシャーシと、前記光源と対向し、前記開口部を覆う形で配される光学部材と、を備え、前記シャーシには、前記光源が配置されている光源配置領域と、前記光源が配置されていない光源非配置領域と、が形成され、前記光学部材は、前記光源配置領域と重畳する光源重畳部と、前記光源非配置領域と重畳する光源非重畳部と、を有し、前記光源重畳部は、前記光源非重畳部に比して前記光源と対向する面における光反射率が相対的に大きいものとされ、当該光源重畳部には、前記光源と対向する面における光反射率が当該光源重畳部内の周囲の領域に比べて相対的に小さい低光反射率領域が含まれていることを特徴とする。
このような構成によれば、当該照明装置の照射面の中心部の輝度を向上させることが可能となる。したがって、当該照明装置を備えた表示装置においても、表示画面の中心部が高輝度化する。人間の目は、通常、表示画面の中央部に注意が注がれるため、表示画面の中心部が高輝度化することにより、良好な視認性を得ることが可能となる。
このような構成によれば、低光反射率領域の長手方向と光源の長手方向とが一致するため、低光反射率領域に対して効率良く光を透過することが可能となる。
このように、低光反射率領域を、その長軸方向が光源の長手方向と一致する楕円形とすることも可能である。
この場合、光反射部の態様によって光学部材の光源側の面における光反射率を適宜変化させることが可能となる。
このような構成によれば、低光反射率領域における透過光量を十分に確保することができ、当該光反射率領域において高輝度化をより一層実現することが可能となる。
このように、光反射部をドットパターンにより構成することにより、そのパターンの態様(数(密度)、面積等)により反射の程度を制御することができ、意図した領域の高輝度化を容易に実現することが可能となる。
また、前記光反射部は、前記光源から遠ざかる方向に向けて、前記光学部材の前記光源と対向する面における光反射率が段階的に逐次小さくなるように形成されているものとすることができる。
このように、光学部材の光反射率をグラデーションをなすように、より具体的には連続的に漸次、あるいは段階的に逐次小さくすることにより、照明光の輝度分布をなだらかにすることができる。
このように、光源配置領域の面積が光源非配置領域の面積よりも小さいものとすることにより、光源の数を低減することができ、低コスト化及び省電力化において大きな効果が期待できる。
このようにすれば、当該照明装置の中央部に十分な輝度を確保することができ、当該照明装置を備える表示装置においても表示中央部の輝度が確保されることとなるため、良好な視認性を得ることが可能となる。
この場合、光学部材の光反射率分布によって、当該光学部材における領域ごとに光透過率をコントロールすることに加えて、光拡散部材によって光の拡散が可能となるため、当該照明装置における面内輝度を一層均一化することが可能となる。
このようにすれば、高輝度化などを図ることができる。
このようにすれば、長寿命化などを図ることができ、また調光を容易に行うことが可能となる。
このようにすれば、長寿命化並びに低消費電力化などを図ることができる。
このような表示装置によると、照明装置において例えば中央部などの意図した領域の輝度を高めること可能となるため、当該表示装置においても中央部が高輝度化された良好な表示を実現することが可能となる。
このようなテレビ受信装置によると、視認性に優れた装置を提供することが可能となる。
本発明の照明装置によると、意図した領域を高輝度化させることが可能となる。また、本発明の表示装置によると、そのような照明装置を備えてなるため、例えば表示画面の中央部を高輝度化することができ、視認性を高めることが可能となる。また、本発明のテレビ受信装置によると、そのような表示装置を備えてなるため、視認性に優れた装置を提供することが可能となる。
本発明の実施形態1を図1ないし図10によって説明する。
まず、液晶表示装置10を備えたテレビ受信装置TVの構成について説明する。
本実施形態に係るテレビ受信装置TVは、図1に示すように、液晶表示装置10と、当該液晶表示装置10を挟むようにして収容する表裏両キャビネットCa,Cbと、電源Pと、チューナーTと、スタンドSとを備えて構成される。液晶表示装置(表示装置)10は、全体として横長の方形を成し、縦置き状態で収容されている。この液晶表示装置10は、図2に示すように、表示パネルである液晶パネル11と、外部光源であるバックライト装置(照明装置)12とを備え、これらが枠状のベゼル13などにより一体的に保持されるようになっている。
液晶パネル(表示パネル)11は、一対のガラス基板が所定のギャップを隔てた状態で貼り合わせられるとともに、両ガラス基板間に液晶が封入された構成とされる。一方のガラス基板には、互いに直交するソース配線とゲート配線とに接続されたスイッチング素子(例えばTFT)と、そのスイッチング素子に接続された画素電極、さらには配向膜等が設けられ、他方のガラス基板には、R(赤色),G(緑色),B(青色)等の各着色部が所定配列で配置されたカラーフィルタや対向電極、さらには配向膜等が設けられている。なお、両基板の外側には偏光板11a,11bが配されている(図3及び図4参照)。
図6は拡散板のうち端部側に形成された光反射部の配置態様を示す模式図、図7は拡散板のうち中央部側に形成された光反射部の配置態様を示す模式図、図8は拡散板のうち熱陰極管と対向する面における光反射率の分布態様を説明する平面図、図9は図8の拡散板のA-A線における光反射率の変化を示すグラフ、図10は図8の拡散板のB-B線における光反射率の変化を示すグラフである。なお、図6ないし図10においては、拡散板の長辺方向をX軸方向とし、短辺方向をY軸方向としている。また、図9は、横軸がY軸方向(短辺方向)を示しており、Y軸方向のY1側の端部(Aで表示)から中央、及び中央からY2側の端部(Aで表示)までの光反射率をプロットしたグラフとなっている。さらに、図10は、横軸がX軸方向(長辺方向)を示しており、X軸方向のX1側の端部(Bで表示)から中央、及び中央からX2側の端部(Bで表示)までの光反射率をプロットしたグラフとなっている。
実施形態1の第1変形例について図11及び図12を用いて説明する。ここでは、低光反射率領域LR‐1にも光反射部40を形成した構成を示す。図11は本変形例に係る拡散板に形成された光反射部の配置態様について示す模式図、図12は図11の拡散板のC-C線における光反射率の変化を示すグラフである。なお、図11及び図12においては、拡散板の長辺方向をX軸方向とし、短辺方向をY軸方向としている。また、図12は、横軸がY軸方向(短辺方向)を示しており、Y軸方向のY1側の端部(Cで表示)から中央、及び中央からY2側の端部(Cで表示)までの光反射率をプロットしたグラフとなっている。なお、本例において、上記実施形態1と同一の構成要素・構成部材については同一の符号を付して説明を省略している。
実施形態1の第2変形例について図13ないし図15を用いて説明する。ここでは、拡散板250aの熱陰極管17側の面における光反射率の分布を変更したものを示す。図13は本変形例に係る拡散板の熱陰極管と対向する面における光反射率の分布態様の一変形例について示す平面図、図14は図13の拡散板のD-D線における光反射率の変化を示すグラフ、図15は図13の拡散板のE-E線における光反射率の変化を示すグラフである。なお、図13ないし図15においては、拡散板の長辺方向をX軸方向とし、短辺方向をY軸方向としている。また、図14は、横軸がY軸方向(短辺方向)を示しており、Y軸方向のY1側の端部(Dで表示)から中央、及び中央からY2側の端部(Dで表示)までの光反射率をプロットしたグラフとなっている。さらに、図15は、横軸がY軸方向(短辺方向)を示しており、Y軸方向のY1側の端部(Eで表示)から中央、及び中央からY2側の端部(Eで表示)までの光反射率をプロットしたグラフとなっている。なお、本例において、上記実施形態1と同一の構成要素・構成部材については同一の符号を付して説明を省略している。
このような構成によれば、光源非重畳部DN(光源非配置領域LN)における照明光の輝度分布をなだらかにすることができ、ひいては当該バックライト装置12全体としてなだらかな照明輝度分布を実現することが可能となる。さらに、このように光反射率が異なる複数の領域52,53,54,55を形成する手段によれば、当該拡散板250aの製造方法が簡便なものとなり、コスト削減に寄与することが可能となる。
次に、本発明の実施形態2を図16及び図17によって説明する。この実施形態2では、実施形態1から光源の配置態様を変更したものを示し、その他は前記実施形態1と同様である。前記実施形態1と同一部分には、同一符号を付して重複する説明を省略する。
図16はバックライト装置に備わるシャーシの概略構成を示す平面図、図18は拡散板のうち冷陰極管と対向する面に形成された光反射部の配置態様を示す模式図である。
次に、本発明の実施形態3を図18ないし図20によって説明する。この実施形態3では、実施形態1からさらに光源の配置態様を変更したものを示し、その他は前記実施形態1と同様である。前記実施形態1と同一部分には、同一符号を付して重複する説明を省略する。
図18は液晶表示装置の概略構成を示す分解斜視図、図19はLED光源の配置態様を示すシャーシの概略平面図、図20は拡散板のうちLED光源と対向する面に形成された光反射部の配置態様を示す模式図である。
実施形態3におけるLED基板81上のLED光源80の配置態様として、図21又は図22に示すような態様を採用することもできる。すなわち、実施形態3では六方最密配置となるように、言い換えれば隣接するLED光源80間の距離が全て等しくなるように当該LED光源80を配置したが、図21に示すように各LED光源80を縦横方向に整列して格子状に配列することもできる。あるいは、図22に示すように、各LED光源80を縦横方向に整列させるものの、隣り合う列同士でLED光源80の位置を互い違いにずらした配列とすることもできる。
以上、本発明の実施形態について示したが、本発明は上記記述及び図面によって説明した実施形態に限定されるものではなく、例えば次のような実施形態も本発明の技術的範囲に含まれる。
Claims (18)
- 光源と、
前記光源を収容し、その光を出射するための開口部を有するシャーシと、
前記光源と対向し、前記開口部を覆う形で配される光学部材と、を備え、
前記シャーシには、前記光源が配置されている光源配置領域と、前記光源が配置されていない光源非配置領域と、が形成され、
前記光学部材は、前記光源配置領域と重畳する光源重畳部と、前記光源非配置領域と重畳する光源非重畳部と、を有し、
前記光源重畳部は、前記光源非重畳部に比して前記光源と対向する面における光反射率が相対的に大きいものとされ、当該光源重畳部には、前記光源と対向する面における光反射率が当該光源重畳部内の周囲の領域に比べて相対的に小さい低光反射率領域が含まれていることを特徴とする照明装置。 - 前記低光反射率領域は、前記光学部材の中心を含む領域に形成されていることを特徴とする請求項1に記載の照明装置。
- 前記光源は長手状をなし、
前記低光反射率領域は、前記光源の長手方向に沿って延びる長手状に形成されていることを特徴とする請求項1又は請求項2に記載の照明装置。 - 前記低光反射率領域は、楕円形をなし、その長軸方向が前記光源の長手方向と一致することを特徴とする請求項3に記載の照明装置。
- 前記光学部材のうち少なくとも前記光源重畳部における前記光源と対向する面には、前記光源からの光を反射する光反射部が形成されていることを特徴とする請求項1から請求項4のいずれか1項に記載の照明装置。
- 前記光反射部は、前記光学部材のうち前記低光反射率領域を除いた領域に形成されていることを特徴とする請求項5に記載の照明装置。
- 前記光反射部は、光反射性を備えたドットパターンにより構成されていることを特徴とする請求項5又は請求項6に記載の照明装置。
- 前記光反射部は、前記光源から遠ざかる方向に向けて、前記光学部材の前記光源と対向する面における光反射率が連続的に漸次小さくなるように形成されていることを特徴とする請求項5から請求項7のいずれか1項に記載の照明装置。
- 前記光反射部は、前記光源から遠ざかる方向に向けて、前記光学部材の前記光源と対向する面における光反射率が段階的に逐次小さくなるように形成されていることを特徴とする請求項5から請求項7のいずれか1項に記載の照明装置。
- 前記シャーシにおいて、前記光源配置領域の面積は、前記光源非配置領域の面積よりも小さいことを特徴とする請求項1から請求項9のいずれか1項に記載の照明装置。
- 前記シャーシは、前記光学部材と対向する部分が少なくとも、第1端部と、前記第1端部とは反対側の端部に位置する第2端部と、前記第1端部と前記第2端部とに挟まれる中央部とに区分されており、
前記中央部が前記光源配置領域とされる一方、前記第1端部及び前記第2端部が前記光源非配置領域とされることを特徴とする請求項1から請求項10のいずれか1項に記載の照明装置。 - 前記光学部材は、前記光源からの光を拡散する光拡散部材であることを特徴とする請求項1から請求項11のいずれか1項に記載の照明装置。
- 前記光源は、熱陰極管とされることを特徴とする請求項1から請求項12のいずれか1項に記載の照明装置。
- 前記光源は、冷陰極管とされることを特徴とする請求項1から請求項12のいずれか1項に記載の照明装置。
- 前記光源は、複数のLEDが並列配置されてなることを特徴とする請求項1から請求項12のいずれか1項に記載の照明装置。
- 請求項1から請求項15のいずれか1項に記載の照明装置と、
前記照明装置からの光を利用して表示を行う表示パネルと、を備えることを特徴とする表示装置。 - 前記表示パネルが液晶を用いた液晶パネルであることを特徴とする請求項16に記載の表示装置。
- 請求項16又は請求項17に記載された表示装置を備えることを特徴とするテレビ受信装置。
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US13/378,708 US8558957B2 (en) | 2009-06-30 | 2010-05-17 | Lighting device, display device and television receiver |
BRPI1012265A BRPI1012265A2 (pt) | 2009-06-30 | 2010-05-17 | dispositivo de iluminação, dispositivo de exibição e receptor de televisão. |
JP2011520827A JP5144810B2 (ja) | 2009-06-30 | 2010-05-17 | 照明装置、表示装置、及びテレビ受信装置 |
EP10793921A EP2434198A1 (en) | 2009-06-30 | 2010-05-17 | Lighting device, display apparatus, and television receiving equipment |
RU2011153355/07A RU2487295C1 (ru) | 2009-06-30 | 2010-05-17 | Устройство освещения, устройство отображения и телевизионный приемник |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202012010460U1 (de) | 2012-10-31 | 2012-11-22 | Michael Feldhege | Multifunktionales, druckbasiertes Mehrkammersystem zur kontrollierten Freisetzung verschiedenartiger Formulierungen zur Anwendung in Haus und Garten sowie in der Schädlingsbekämpfung |
US8994896B2 (en) | 2011-05-31 | 2015-03-31 | Panasonic Intellectual Property Management Co., Ltd. | Surface light source and liquid crystal display device |
JP5849192B2 (ja) * | 2011-05-31 | 2016-01-27 | パナソニックIpマネジメント株式会社 | 面光源および液晶ディスプレイ装置 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09236803A (ja) * | 1996-02-28 | 1997-09-09 | Victor Co Of Japan Ltd | 液晶ディスプレイ用バックライト |
JP2005117023A (ja) | 2003-09-19 | 2005-04-28 | Sony Corp | バックライト装置及び液晶表示装置 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2172974C2 (ru) * | 1999-04-20 | 2001-08-27 | ОПТИВА, Инк. | Жидкокристаллический дисплей |
CN1853068A (zh) * | 2003-09-19 | 2006-10-25 | 索尼株式会社 | 背光装置和液晶显示装置 |
EP1788302A4 (en) * | 2004-09-06 | 2011-08-24 | Fujifilm Corp | TRANSMITTANCE SETTING UNIT, PLAN LIGHTING DEVICE, LIQUID CRYSTAL DISPLAY DEVICE USING THE DEVICE AND METHOD FOR PROVIDING TRANSMITTANCE SETTING SYSTEM |
KR20080088821A (ko) * | 2007-03-30 | 2008-10-06 | 엘지디스플레이 주식회사 | 백라이트 유닛 및 이를 구비한 액정표시장치 |
CN101828067B (zh) * | 2007-10-19 | 2013-03-27 | 夏普株式会社 | 照明装置、显示装置、电视接收装置 |
CN101883949B (zh) * | 2007-12-07 | 2012-11-07 | 夏普株式会社 | 照明装置、显示装置和电视接收装置 |
RU2463517C2 (ru) * | 2008-03-05 | 2012-10-10 | Шарп Кабусики Кайся | Устройство освещения, дисплейное устройство и телевизионный приемник |
CN102016391A (zh) * | 2008-04-28 | 2011-04-13 | 夏普株式会社 | 照明装置、显示装置以及电视接收装置 |
RU83680U1 (ru) * | 2008-12-08 | 2009-06-10 | Александр Андреевич Петров | Светильник |
RU83587U1 (ru) * | 2009-01-20 | 2009-06-10 | Общество с ограниченной ответственностью "Технологии Энергосбережения" | Светильник уличный светодиодный |
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- 2010-05-17 US US13/378,708 patent/US8558957B2/en not_active Expired - Fee Related
- 2010-05-17 CN CN2010800268602A patent/CN102459996A/zh active Pending
- 2010-05-17 RU RU2011153355/07A patent/RU2487295C1/ru not_active IP Right Cessation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09236803A (ja) * | 1996-02-28 | 1997-09-09 | Victor Co Of Japan Ltd | 液晶ディスプレイ用バックライト |
JP2005117023A (ja) | 2003-09-19 | 2005-04-28 | Sony Corp | バックライト装置及び液晶表示装置 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8994896B2 (en) | 2011-05-31 | 2015-03-31 | Panasonic Intellectual Property Management Co., Ltd. | Surface light source and liquid crystal display device |
JP5849192B2 (ja) * | 2011-05-31 | 2016-01-27 | パナソニックIpマネジメント株式会社 | 面光源および液晶ディスプレイ装置 |
DE202012010460U1 (de) | 2012-10-31 | 2012-11-22 | Michael Feldhege | Multifunktionales, druckbasiertes Mehrkammersystem zur kontrollierten Freisetzung verschiedenartiger Formulierungen zur Anwendung in Haus und Garten sowie in der Schädlingsbekämpfung |
Also Published As
Publication number | Publication date |
---|---|
RU2487295C1 (ru) | 2013-07-10 |
JPWO2011001750A1 (ja) | 2012-12-13 |
EP2434198A1 (en) | 2012-03-28 |
CN102459996A (zh) | 2012-05-16 |
BRPI1012265A2 (pt) | 2016-04-05 |
US20120086874A1 (en) | 2012-04-12 |
US8558957B2 (en) | 2013-10-15 |
JP5144810B2 (ja) | 2013-02-13 |
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