WO2012070442A1 - Dispositif d'éclairage et dispositif d'affichage - Google Patents

Dispositif d'éclairage et dispositif d'affichage Download PDF

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Publication number
WO2012070442A1
WO2012070442A1 PCT/JP2011/076376 JP2011076376W WO2012070442A1 WO 2012070442 A1 WO2012070442 A1 WO 2012070442A1 JP 2011076376 W JP2011076376 W JP 2011076376W WO 2012070442 A1 WO2012070442 A1 WO 2012070442A1
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WO
WIPO (PCT)
Prior art keywords
light
guide plate
light guide
light source
pattern portion
Prior art date
Application number
PCT/JP2011/076376
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English (en)
Japanese (ja)
Inventor
中村真由美
Original Assignee
シャープ株式会社
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 シャープ株式会社 filed Critical シャープ株式会社
Publication of WO2012070442A1 publication Critical patent/WO2012070442A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0091—Positioning aspects of the light source relative to the light guide

Definitions

  • the present invention relates to an illuminating device, and more particularly to an illuminating device including a light source and a light guide plate that emits light from the light source to an irradiated object such as a liquid crystal panel, and a display device using the illuminating device.
  • liquid crystal display devices have been widely used in liquid crystal televisions, monitors, mobile phones and the like as flat panel displays having features such as thinness and light weight compared to conventional cathode ray tubes.
  • a liquid crystal display device includes an illumination device (backlight) that emits light and a liquid crystal panel that displays a desired image by serving as a shutter for light from a light source provided in the illumination device. It is.
  • the illumination device is roughly classified into a direct type and an edge light type depending on the arrangement of the light source with respect to the liquid crystal panel as an object to be irradiated with light.
  • mobile devices such as mobile phones, notebook PCs, and PDAs are used.
  • an edge light type that is easy to be thinned compared to a direct type is generally used. That is, in the edge light type illumination device, the light source is arranged on the side of the liquid crystal panel to reduce the thickness, and a light guide plate having a light emitting surface arranged to face the non-display surface of the liquid crystal panel is provided. The light from the light source is applied to the liquid crystal panel.
  • the light source for example, a plurality of point light sources such as LEDs, or a linear light source between cold cathodes is used.
  • a plurality of point light sources are arranged, brightness unevenness occurs in the vicinity of the incident surface of the light guide plate during lighting. If the luminance is uneven, the display quality is lowered.
  • the present invention provides an illumination device excellent in light emission quality capable of preventing the occurrence of luminance unevenness while suppressing a decrease in luminance of illumination light, and a display device using the same. With the goal.
  • An illuminating device disclosed in the present application is an illuminating device including a plurality of light sources arranged side by side and a light guide plate that guides light from the light sources in a predetermined propagation direction and emits the light to an irradiated object side.
  • the light guide plate is disposed opposite to the light source, and has a light incident surface that receives light from the light source, and an output surface that emits light to the irradiated object side,
  • a pattern portion is provided that is subjected to patterning for changing the propagation direction of light, A distance L between the light source side end of the pattern portion and the light source and a distance p between adjacent light sources satisfy the relationship of the following formula (1).
  • an end portion on the light source side of the pattern portion is located on the inner side of the light incident surface of the light guide plate.
  • the lighting device includes a light source substrate having an attachment surface to which the light source is attached, and the light source is arranged so that the attachment surface of the light source substrate is parallel to the light incident surface of the light guide plate. It can be set as the aspect arrange
  • the display device of the present invention is characterized by using any one of the lighting devices described above.
  • the display device configured as described above, since an illumination device with excellent light emission quality that can prevent uneven brightness in the illumination light to the irradiated object is used, a display with excellent display quality is used.
  • the apparatus can be easily configured.
  • a liquid crystal panel may be used as the irradiated object.
  • liquid crystal display device excellent in display quality can be easily configured.
  • FIG. 1 is a diagram for explaining an illumination device and a liquid crystal display device according to a first embodiment of the present invention.
  • FIG. 2 is a diagram for explaining the configuration of the liquid crystal panel shown in FIG.
  • FIG. 3 is a plan view illustrating an arrangement example of the light emitting diode, the light guide plate, and the pattern portion.
  • FIG. 4 is an enlarged side view for explaining a main configuration of the lighting apparatus shown in FIG.
  • FIG. 5 is a graph showing the results of examining the unevenness level when p / L is changed.
  • FIG. 6 is an enlarged side view illustrating the configuration of the main part of the illumination device according to the second embodiment of the present invention.
  • FIG. 1 is a diagram for explaining an illumination device and a liquid crystal display device according to a first embodiment of the present invention.
  • FIG. 2 is a diagram for explaining the configuration of the liquid crystal panel shown in FIG.
  • FIG. 3 is a plan view illustrating an arrangement example of the light emitting diode, the light guide plate
  • FIG. 1 is a diagram for explaining an illumination device and a liquid crystal display device according to a first embodiment of the present invention.
  • the liquid crystal display device 1 according to the present embodiment includes a liquid crystal panel 2 in which the upper side of FIG. 1 is installed as a viewing side (display surface side), and a non-display surface side of the liquid crystal panel 2 (lower side of FIG. 1).
  • an illuminating device 3 of the present invention that generates illumination light for illuminating the liquid crystal panel 2.
  • the liquid crystal panel 2 and the illumination device 3 are assembled to each other, and are integrated as a transmissive liquid crystal display device 1 in which illumination light from the illumination device 3 enters the liquid crystal panel 2. ing.
  • the liquid crystal panel 2 includes a liquid crystal layer and an active matrix substrate and a color filter substrate as a pair of substrates that sandwich the liquid crystal layer (not shown).
  • the active matrix substrate pixel electrodes, thin film transistors (TFTs), etc. (not shown) are formed between the liquid crystal layers in accordance with a plurality of pixels included in the display surface of the liquid crystal panel 2.
  • TFTs thin film transistors
  • the color filter substrate a color filter, a counter electrode, and the like are formed between the liquid crystal layer (not shown).
  • the liquid crystal panel 2 is provided with a control device (not shown) that controls the driving of the liquid crystal panel 2, and operates the liquid crystal layer in units of pixels to drive the display surface in units of pixels. A desired image is displayed on the display surface.
  • the liquid crystal mode and pixel structure of the liquid crystal panel 2 are arbitrary. Moreover, the drive mode of the liquid crystal panel 2 is also arbitrary. That is, as the liquid crystal panel 2, any liquid crystal panel that can display information can be used. Therefore, the detailed structure of the liquid crystal panel 2 is not shown in FIG.
  • liquid crystal panel 2 of the present embodiment will be specifically described with reference to FIG.
  • FIG. 2 is a diagram for explaining the configuration of the liquid crystal panel shown in FIG.
  • the liquid crystal display device 1 (FIG. 1) includes a panel control unit 16 that performs drive control of the liquid crystal panel 2 (FIG. 1) as the display unit that displays information such as characters and images, and the panel control.
  • a source driver 17 and a gate driver 18 that operate based on an instruction signal from the unit 16 are provided.
  • the panel control unit 16 is provided in the control device, and receives a video signal from the outside of the liquid crystal display device 1. In addition, the panel control unit 16 performs predetermined image processing on the input video signal to generate each instruction signal to the source driver 17 and the gate driver 18, and the input video signal. And a frame buffer 16b capable of storing display data for one frame included. Then, the panel control unit 16 controls the driving of the source driver 17 and the gate driver 18 according to the input video signal, so that information corresponding to the video signal is displayed on the liquid crystal panel 2.
  • the source driver 17 and the gate driver 18 are installed on the active matrix substrate, for example. Specifically, the source driver 17 is installed on the surface of the active matrix substrate so as to extend along the lateral direction of the liquid crystal panel 2 in the outer area of the effective display area A of the liquid crystal panel 2 as a display panel. Further, the gate driver 18 is installed on the surface of the active matrix substrate so as to be along the vertical direction of the liquid crystal panel 2 in the outer region of the effective display region A.
  • the source driver 17 and the gate driver 18 are drive circuits for driving a plurality of pixels P provided on the liquid crystal panel 2 side by pixel, and the source driver 17 and the gate driver 18 include a plurality of source lines S1 to S1.
  • SM is an integer of 2 or more, hereinafter collectively referred to as “S”
  • G gate wirings G1 to GN
  • S and G constitute a data wiring and a scanning wiring, respectively, on a transparent glass material or a transparent synthetic resin substrate (not shown) included in the active matrix substrate. They are arranged in a matrix so as to cross each other.
  • the source wiring S is provided on the substrate so as to be parallel to the matrix-like column direction (vertical direction of the liquid crystal panel 2), and the gate wiring G is arranged in the matrix-like row direction (horizontal of the liquid crystal panel 2). Is provided on the substrate so as to be parallel to (direction).
  • the thin film transistor 19 as a switching element and the pixel P having the pixel electrode 20 connected to the thin film transistor 19 are provided.
  • the common electrode 21 is configured to face the pixel electrode 20 with the liquid crystal layer provided on the liquid crystal panel 2 interposed therebetween. That is, in the active matrix substrate, the thin film transistor 19, the pixel electrode 20, and the common electrode 21 are provided for each pixel.
  • a plurality of pixel P regions are formed in each region partitioned in a matrix by the source wiring S and the gate wiring G.
  • the plurality of pixels P include red (R), green (G), and blue (B) pixels. These RGB pixels are sequentially arranged in this order, for example, in parallel with the gate wirings G1 to GN. Further, these RGB pixels can display corresponding colors by a color filter layer (not shown) provided on the color filter substrate side.
  • the gate driver 18 scans a gate signal of the corresponding thin film transistor 19 with respect to the gate wirings G1 to GN (gate signal) based on an instruction signal from the image processing unit 16a. ) Are output sequentially.
  • the source driver 17 also supplies a data signal (voltage signal (gradation voltage)) corresponding to the luminance (gradation) of the display image to the corresponding source wirings S1 to SM based on the instruction signal from the image processing unit 16a. Output.
  • the lighting device 3 shown in FIG. 1 is an example of a so-called edge light module.
  • the illumination device 3 includes a light emitting diode 4 as an example of a light source, an LED substrate 5 as a light source substrate on which the light emitting diode 4 is mounted, and light from the light emitting diode 4 in a predetermined propagation direction (left and right direction in FIG. 1). And a light guide plate 6 for emitting the light on the liquid crystal panel (irradiated object) 2 side.
  • the light guide plate 6 is made of, for example, a synthetic resin such as a transparent acrylic resin having a rectangular cross section.
  • the light guide plate 6 is disposed so as to face the light emitting diode 4, and light from the light emitting diode 4 is used.
  • the light emitting surface 6 b is the exit surface of the light guide plate 6, and the facing surface 6 c is the bottom surface of the light guide plate 6.
  • the surface that does not face the light incident surface 6a, that is, the surface perpendicular to the light incident surface 6a is the light emitting surface 6b.
  • patterning can be performed on the facing surface 6c.
  • the pattern part 30 which patterned for changing the propagation direction of light is formed in the opposing surface 6c which opposes the light emission surface 6b which is the light emission surface of the light-guide plate 6. As shown in FIG. .
  • a reflector 8 is provided below the light emitting diode 4 and the light guide plate 6 in the lighting device 3.
  • the reflecting plate 8 reflects light from the light emitting diode 4 and the light guide plate 6.
  • a reflecting plate 9 as a reflecting portion that reflects light from the light emitting diode 4 is also provided on the liquid crystal panel 2 side of the light emitting diode 4.
  • a diffusion sheet 10, a prism sheet 11, and a reflective polarizing sheet 12 are sequentially provided from the light guide plate 6 side as optical members provided between the light guide plate 6 and the liquid crystal panel 2. ing. By these optical members, the light from the light emitting surface 6b of the light guide plate 6 is changed to the above-mentioned planar illumination light having uniform luminance and is given to the liquid crystal panel 2.
  • FIG. 3 is a plan view showing an arrangement example of the light emitting diode 4, the light guide plate 6, and the pattern unit 30 when viewed from the liquid crystal panel 2 side.
  • the plurality of light emitting diodes 4 are arranged along the light incident surface 6 a of the light guide plate 6 at intervals p.
  • the interval p (pitch) is, for example, the distance between the center lines CL of the adjacent light emitting diodes 4.
  • the distance L between the light emitting diode 4 side end of the pattern unit 30 and the light emitting diode 4 and the distance p between the adjacent light emitting diodes 4 satisfy the relationship of the following formula (1).
  • p / L ⁇ 2.0 ⁇ (1)
  • the lighting device 3 includes a bottomed chassis 13 that houses the light emitting diode 4, the light guide plate 6, the diffusion sheet 10, the prism sheet 11, and the reflective polarizing sheet 12, and an L-shaped cross section having an opening.
  • a bezel 14 which is assembled to the chassis 13 and constitutes an outer container of the lighting device 3 is provided.
  • a P (plastic) chassis 15 is installed on the bezel 14, and the liquid crystal panel 2 is placed on the P chassis 15. 3 are assembled together.
  • FIG. 4 is an enlarged side view for explaining a main configuration of the lighting apparatus shown in FIG.
  • FIG. 4 only the diffusion sheet 10 out of the diffusion sheet 10, the prism sheet 11, and the reflective polarizing sheet 12 as optical members is illustrated and described for the sake of simplification of the drawing (see below). The same applies to FIGS. 6, 7 and 8.)
  • a light emitting diode 4 that emits white light is used.
  • the light emitting diode 4 is disposed to face the light incident surface 6 a of the light guide plate 6. Further, the center line CL of the light emitting diode 4 is arranged in a state where the center line CL in the thickness direction of the light guide plate 6 (vertical direction in FIG. 4) coincides with the center in the same direction.
  • the light emitting diode 4 faces the light guide plate 6 so that the mounting surface (attachment surface to which the light source is attached) 5 a of the LED substrate 5 is parallel to the light incident surface 6 a of the light guide plate 6. Has been placed.
  • the end surface 10 a on the light emitting diode 4 side of the diffusion sheet 10 is separated from the light incident surface 6 a of the light guide plate 6 by a predetermined distance W2 from the light emitting diode 4 side.
  • the light emitting diode 4 is provided so that the distance L between the light emitting diode 4 side end of the pattern portion 30 and the light emitting diode 4 satisfies the relationship of the above formula (1).
  • the pattern unit 30 is arranged so that the end of the pattern unit 30 on the light emitting diode 4 side is located inside the light incident surface 6 a of the light guide plate 6.
  • the pattern part 30 can be formed by, for example, printing a paint on the surface of the light guide plate 6, but the patterning method in the pattern part 30 is not limited to a specific one.
  • patterning for example, convex portions or concave portions of about 0.01 to 0.09 mm can be distributed on the surface of the light guide plate.
  • the pattern unit 30 can be formed by printing a paint having a refractive index of 1.0 or more on the surface of the light guide plate 6.
  • Such convex portions or concave portions may be distributed so as to become denser as the distance from the light incident surface 6 a of the light guide plate 6 increases, for example.
  • the range in which the pattern part 30 is formed affects the light emission range from the light emitting surface 6b.
  • the pattern portion 30 is preferably provided corresponding to the emission range.
  • the pattern part 30 may be formed so that the edge part by the side of the light source of the pattern part 30 may be located in the light-incidence surface 6a of the light-guide plate 6.
  • the distance L between the end portion of the pattern portion 30 and the light emitting diode 4 and the pitch p are set as described above.
  • the illumination device 3 it is possible to prevent luminance unevenness from occurring in the illumination light to the liquid crystal panel (object to be irradiated) 2, and to suppress reduction in luminance and narrow frame. . As a result, it is possible to configure the lighting device 3 having excellent light emission quality.
  • FIG. 5 is a graph showing the result of examining the unevenness level when the relationship between the distance L between the light incident surface 6a of the light guide plate 6 and the light emitting diode 4 and the interval p between the light emitting diodes 4 is changed.
  • the line K indicates the level of unevenness that has passed the subjective evaluation.
  • p / L> 2.0 luminance unevenness is seen in the vicinity of the light emitting diode 4 and the display quality is deteriorated.
  • the unevenness level can be evaluated, for example, as follows.
  • luminance distribution data of those that are considered to have good unevenness levels are collected.
  • the brightness position is constant regardless of the location.
  • the brightness distribution data is taken again by changing the LED pitch.
  • the unevenness level at the pitch can be evaluated. For example, if the luminance distribution data after the pitch change is not constant compared to the luminance distribution data acquired in advance, it can be determined that the unevenness level is bad.
  • the display quality is excellent.
  • the liquid crystal display device 1 can be easily configured.
  • FIG. 6 is an enlarged side view illustrating the configuration of the main part of the illumination device according to the second embodiment of the present invention.
  • the pattern portion 31 is formed by processing the facing surface 6 c of the light guide plate 6.
  • the pattern portion 31 is a region where fine concave portions are distributed on the facing surface 6 c.
  • Such a pattern part 31 can be formed by laser processing, for example.
  • the light guide plate 6 provided with the pattern portions 31 can also be made by a method in which the light guide plate material is poured into a mold and hardened. Moreover, it can replace with or add to the structure which forms a recessed part in the surface of a light-guide plate as mentioned above, and can also form a convex part.
  • This embodiment is an example of the case where the pattern portion is formed by providing irregularities on the surface of the light guide plate. Even in such a configuration, the relationship between the distance L between the end portion of the pattern portion 31 and the light emitting diode 4 and the interval p between the light emitting diodes 4 is set to the relationship shown in the above (1). The same effect as the form can be obtained.
  • FIG. 7 is an enlarged side view explaining the principal part structure of the illuminating device concerning the 3rd Embodiment of this invention.
  • the same members as those in FIG. 7 the main difference between the present embodiment and the first embodiment is that the pattern portion 32 is formed of an optical sheet.
  • a prism sheet including an interface having irregularities with respect to the facing surface 6 c is provided as the pattern portion 32 on the facing surface 6 c. The light totally reflected at the interface of the prism sheet changes in the propagation direction at random, so that the light directed toward the light emitting surface 6b increases.
  • FIG. 8 is an enlarged side view explaining the principal part structure of the illuminating device concerning the 4th Embodiment of this invention.
  • a prism sheet including an interface having irregularities with respect to the light emitting surface 6b is provided as the pattern portion 33 on the light emitting surface 6b.
  • the light totally reflected at the interface of the prism sheet changes in the propagation direction at random, so that the light toward the facing portion 6c increases.
  • the light traveling toward the facing surface 6c is reflected by the reflecting sheet 8 and travels toward the light emitting surface 6b. Therefore, as a result, the light toward the light emitting surface 6b increases.
  • this embodiment is an example in which the pattern portion is provided on the light exit surface (front surface) of the light guide plate. Also in the present embodiment, the relationship between the distance L between the end portion of the pattern portion 33 and the light emitting diode 4 and the interval p between the light emitting diodes 4 is the relationship shown in the above (1), so that the first The same effect as the embodiment can be obtained.
  • FIG. 9 is a top view explaining the principal part arrangement
  • the same members as those in FIG. In FIG. 9, the main difference between the present embodiment and the first embodiment is that the end of the pattern unit 30 on the light emitting diode 4 side is not linear but formed in a curved shape. That is, when viewed from the light emitting surface side of the light guide plate 6, the end portion of the pattern portion 30 is formed in a shape recessed inward at a position corresponding to the light emitting diode 4.
  • the distance L between the light emitting diode 4 and the end of the pattern unit 30 is defined by, for example, the distance between the end of the pattern unit 30 facing the light emitting diode 4 and the end located closest to the light emitting diode 4. can do.
  • the relationship between the distance L between the end portion of the pattern portion 30 and the light emitting diode 4 and the interval p between the light emitting diodes 4 defined as described above is set to the relationship shown in the above (1). The same effect as the form can be obtained.
  • the method for defining the distance L is not limited to the above example.
  • the average value of the distance between the light emitting diode 4 and the pattern portion may be the distance L.
  • the present invention is applied to a transmissive liquid crystal display device.
  • the lighting device of the present invention is not limited to this, and a transflective liquid crystal display device or a liquid crystal display device is not limited thereto.
  • the present invention can be applied to various display devices such as a projection display device using a panel as a light valve.
  • the present invention is installed on a light box for illuminating X-ray film or photographic negatives for irradiating light to make it easy to see, or on a signboard or a wall in a station. It can be suitably used as a lighting device for a light emitting device that illuminates advertisements and the like.
  • the light emitting diode is used as the light source.
  • the light source of the present invention is not limited to this, and a discharge tube such as a cold cathode fluorescent tube or a hot cathode fluorescent tube is used. You can also
  • the LED substrate (light source substrate) having the mounting surface (mounting surface) is provided, and the light emitting diode (light source) is arranged so that the mounting surface of the LED substrate is parallel to the light incident surface of the light guide plate.
  • the structure provided so that the attachment surface of a light source substrate may become a predetermined angle with respect to the light-incidence surface of a light-guide plate may be sufficient.
  • the narrow frame can be easily achieved.
  • the configuration in which the pattern portion is provided on the opposing surface 6c of the light guide plate 6 and the configuration in which the pattern portion is provided on the light emitting surface 6b have been described.
  • the pattern portion is provided on both the opposing surface 6c and the light emitting surface 6b. May be.
  • the light source is installed so as to face one side surface of the light guide plate.
  • the present invention is not limited to this, and the light source is provided on at least one side surface of the light guide plate. What is necessary is just to oppose.
  • the present invention is useful for an illuminating device excellent in light emission quality capable of preventing unevenness in luminance of illumination light and a display device using the same.
  • Liquid crystal display device Liquid crystal panel (object to be irradiated) 3 Lighting device 4 Light emitting diode (light source) 5 LED board (light source board) 5a Mounting surface (mounting surface) 6 Light guide plate 6a Light incident surface (incident surface) 6b Light emitting surface (outgoing surface) 6c Opposing surface 30, 31, 32, 33 Pattern part

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

Abstract

L'invention porte sur un dispositif d'éclairage (3), qui comporte une pluralité de sources de lumière (4) et une plaque de guidage de lumière (6), la plaque de guidage de lumière (6) ayant une surface d'entrée de lumière (6a) où entre une lumière provenant des sources de lumière (4) et une surface de sortie (6b) où une lumière sort sur le côté vers un objet à irradier. Une partie à motifs (30) pour laquelle une réalisation de motifs pour altérer la direction de propagation de la lumière a été réalisée, est disposée sur la surface de sortie (6b) ou sur la surface (6c) sur le côté opposé à celle-ci. Une distance (L) entre une partie d'extrémité de la partie à motifs (30) et les sources de lumière (4) et une distance (p) entre des sources de lumière adjacentes satisfont à la relation : p/L ≤ 2,0. Par conséquent, des apparitions de variations de luminosité sont empêchées, tout en supprimant des réductions de la luminosité de la lumière d'éclairage dans le dispositif d'éclairage.
PCT/JP2011/076376 2010-11-25 2011-11-16 Dispositif d'éclairage et dispositif d'affichage WO2012070442A1 (fr)

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JP2010262578 2010-11-25
JP2010-262578 2010-11-25

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WO2012070442A1 true WO2012070442A1 (fr) 2012-05-31

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200115451A (ko) * 2018-01-31 2020-10-07 니폰 덴키 가라스 가부시키가이샤 유리 롤, 유리 롤의 제조 방법 및 품질 평가 방법

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010153103A (ja) * 2008-12-24 2010-07-08 Furukawa Electric Co Ltd:The 照明装置及び照明装置の導光体の製造方法
JP2010251026A (ja) * 2009-04-13 2010-11-04 Victor Co Of Japan Ltd バックライト装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010153103A (ja) * 2008-12-24 2010-07-08 Furukawa Electric Co Ltd:The 照明装置及び照明装置の導光体の製造方法
JP2010251026A (ja) * 2009-04-13 2010-11-04 Victor Co Of Japan Ltd バックライト装置

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200115451A (ko) * 2018-01-31 2020-10-07 니폰 덴키 가라스 가부시키가이샤 유리 롤, 유리 롤의 제조 방법 및 품질 평가 방법
JPWO2019151246A1 (ja) * 2018-01-31 2020-12-03 日本電気硝子株式会社 ガラスロール、ガラスロールの製造方法および品質評価方法
JP7324424B2 (ja) 2018-01-31 2023-08-10 日本電気硝子株式会社 ガラスロール、ガラスロールの製造方法および品質評価方法
KR102665650B1 (ko) 2018-01-31 2024-05-14 니폰 덴키 가라스 가부시키가이샤 유리 롤, 유리 롤의 제조 방법 및 품질 평가 방법

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