WO2017204413A1 - Unité de rétroéclairage et dispositif d'affichage utilisant ladite unité de rétroéclairage - Google Patents

Unité de rétroéclairage et dispositif d'affichage utilisant ladite unité de rétroéclairage Download PDF

Info

Publication number
WO2017204413A1
WO2017204413A1 PCT/KR2016/009184 KR2016009184W WO2017204413A1 WO 2017204413 A1 WO2017204413 A1 WO 2017204413A1 KR 2016009184 W KR2016009184 W KR 2016009184W WO 2017204413 A1 WO2017204413 A1 WO 2017204413A1
Authority
WO
WIPO (PCT)
Prior art keywords
adhesive
guide plate
light guide
light
light source
Prior art date
Application number
PCT/KR2016/009184
Other languages
English (en)
Korean (ko)
Inventor
안기태
이승호
이윤희
오채영
Original Assignee
엘지전자 주식회사
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 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Publication of WO2017204413A1 publication Critical patent/WO2017204413A1/fr

Links

Images

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • 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
    • 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
    • G02F2202/00—Materials and properties
    • G02F2202/28—Adhesive materials or arrangements

Definitions

  • the present invention relates to a backlight unit and a display device using the same.
  • the backlight unit used in the LCD may be classified into an edge type backlight unit and a direct type backlight unit according to the position of the light source.
  • the light source is disposed on the left and right sides or the top and bottom sides of the LCD panel and the light is evenly distributed on the front surface using the light guide plate, so that the light uniformity is excellent and the panel thickness can be made ultra thin.
  • the direct method is a technology generally used for a display of 20 inches or more. Since a plurality of light sources are disposed under the panel, the direct light method has an advantage of superior light efficiency compared to an edge method and is mainly used for a large display requiring high brightness.
  • LED Light Emitting Diode
  • the LED array can be partially turned on and off, which greatly reduces the power consumption.
  • RGB LEDs can exceed 100% of the NTSC (National Television System Committee) color gamut specification to provide consumers with more vivid picture quality.
  • the backlight unit when the backlight unit is mounted on the display device, depending on the thickness and the light efficiency of the backlight unit, the backlight unit may greatly affect the thickness and the image quality of the display device.
  • Another object of the present invention is to provide a backlight unit and a display device using the same, by disposing an adhesive pattern having an air gap between the light guide plate and the reflecting plate, thereby improving the structure, slimming, and light efficiency.
  • Still another object is to provide a backlight unit and a display device using the same, which increase the density of the adhesive pattern in a region far from the light source rather than an area adjacent to the light source to uniformly diffuse the light.
  • Still another object is to provide a backlight unit and a display apparatus using the same by disposing an adhesive layer having a plurality of holes, which are air gaps, between the light guide plate and the reflecting plate to simultaneously improve the adhesive force and light efficiency and simplify the process.
  • a backlight unit includes a reflector, a light guide plate disposed on the light guide plate, an optical member disposed on the light guide plate, and a light source module disposed at a side of the light guide plate, and between the reflector plate and the light guide plate, Adherence patterns can be formed.
  • a display apparatus using a backlight unit includes a display panel and a backlight unit for irradiating light to the display panel, wherein the backlight unit includes a reflector, a light guide plate disposed on the reflector, and an optical member disposed on the light guide plate.
  • the optical member includes a light source module disposed on a side of the light guide plate, and a plurality of adhesion patterns may be formed between the reflective plate and the light guide plate.
  • the structure by disposing an adhesive pattern having an air gap between the light guide plate and the reflecting plate, the structure may be simplified, the thickness may be reduced, and the light efficiency may be improved.
  • the density of the adhesive pattern may be higher in the area far from the light source than in the area adjacent to the light source, thereby uniformly spreading the light as a whole.
  • an adhesive layer having a plurality of holes, which are air gaps, may be disposed between the light guide plate and the reflecting plate, thereby simultaneously improving adhesion and light efficiency and simplifying the process.
  • the light guide plate and the reflecting plate are attached by an adhesive pattern or a pressure-sensitive adhesive layer, the light guide plate and the reflecting plate can be integrated, so that the large area is easy, and thus the size of the light guide plate is large It can be applied to large TVs.
  • FIG. 1 is a structural cross-sectional view showing a backlight unit according to the present invention.
  • FIG. 2 is a plan view illustrating an adhesive layer according to a first exemplary embodiment of the present invention and showing an adhesive pattern arranged on a lower surface of the light guide plate.
  • 3 to 7 are views showing an adhesive layer according to a second embodiment of the present invention.
  • 13 to 17 is a view showing an adhesive layer according to a fourth embodiment of the present invention.
  • 18 is a side view showing the shape of the adhesive pattern according to the present invention.
  • 19 and 20 are views showing an adhesive layer according to a fifth embodiment of the present invention.
  • 21 to 23 are views showing an adhesive layer according to a sixth embodiment of the present invention.
  • 24 to 28 are views showing an adhesive layer according to a seventh embodiment of the present invention.
  • 29 is a view showing an adhesive layer according to an eighth embodiment of the present invention.
  • FIG. 30 is a view showing an adhesive layer according to a ninth embodiment of the present invention.
  • 31 is an exploded view showing a display device using the backlight unit according to the present invention.
  • FIG. 1 is a structural cross-sectional view showing a backlight unit according to the present invention.
  • the backlight unit of the present invention may include a reflecting plate 10, a light guide plate 30, an optical member 20, and a light source module 40.
  • an adhesive layer including a plurality of adhesion patterns 50 may be formed between the reflective plate 10 and the light guide plate 30.
  • the light guide plate 30 may be disposed above the reflective plate 10, and the exterior member 70 may be disposed below the reflective plate 10.
  • the adhesive layer 80 may be formed between the reflective plate 10 and the exterior member 70.
  • the reflector 10 may include at least one of a metal or a metal oxide, and has a metal or metal oxide having high reflectance such as aluminum (Al), silver (Ag), gold (Au), or titanium dioxide (TiO 2 ). It may be configured to include.
  • the reflector 10 may have a thickness of about 100 ⁇ m to about 300 ⁇ m, and the reflector 10 may be surface-treated with a bid or the like in order to improve a reflection diffusion function.
  • the exterior member 70 may be any one selected from polycarbonate (PC), polyethylene terephthlate (PET), advanced composite materials (ACM), and the like.
  • the exterior member 70 can be applied to the flame retardant grade of about V0 or more, for example, may be applied to the V2 or more. This is because the exterior member 70 can protect the adhesive pattern 50 located inside by blocking the external heat.
  • the exterior member 70 may have a thickness of about 50 ⁇ m to about 5 mm. For example, about 125 ⁇ m to about 500 ⁇ m may be applied.
  • the exterior member 70 may apply surface treatment to block fingerprints, scratches, and the like.
  • the light guide plate 30 may be formed of glass, an acrylic resin such as polymethylmethacrylate (PMMA), polyethylene terephthlate (PET), cyclic olefin copolymers (COC), polyethylene naphthalate (PEN), polycarbonate (PC), polystyrene (PS), and It may be any one of the MS (Mathacylate styrene) resin.
  • the light guide plate 30 may have a thickness of about 25 ⁇ m to about 2500 ⁇ m. For example, a thickness of about 1000 ⁇ m to about 2000 ⁇ m may be applied.
  • the optical member 20 may be disposed on the light guide plate 30.
  • the optical member 20 is to diffuse light emitted through the light guide plate 30, and may have an uneven pattern on the upper surface to increase the diffusion effect.
  • the optical member 20 may be formed of several layers, and the uneven pattern may be on the surface of the uppermost layer or any one layer.
  • the uneven pattern may have a stripe shape disposed along the light source module 40.
  • the uneven pattern has a protrusion on the surface of the optical member 20, the protrusion is composed of a first surface and a second surface facing each other, the angle between the first surface and the second surface may be an obtuse angle or an acute angle.
  • the optical member 20 includes at least one sheet, and may optionally include a diffusion sheet, a prism sheet, a brightness enhancement sheet, and the like.
  • the diffusion sheet diffuses the light emitted from the light source
  • the prism sheet guides the diffused light to the light emitting region
  • the luminance diffusion sheet enhances the luminance.
  • the light source module 40 may be disposed on the side surface of the light guide plate 30.
  • the light source module 40 may include a substrate and at least one light source disposed on the substrate.
  • an adhesive layer including a plurality of adhesion patterns 50 may be formed between the reflective plate 10 and the light guide plate 30.
  • an air gap 60 may be formed between the adhesion patterns 50 adjacent to each other.
  • the adhesive pattern 50 may be a mixed material in which a predetermined additive is mixed in a pressure-sensitive adhesive.
  • the pressure-sensitive adhesive may be at least one selected from acrylic pressure-sensitive adhesive, polysiloxane pressure-sensitive adhesive, polyester pressure-sensitive adhesive.
  • the additive may be at least one of TiO 2 and silicon.
  • the reason for mixing the additive in the pressure-sensitive adhesive is because the refractive and diffusing characteristics of the light passing through the pressure-sensitive adhesive pattern 50 can be improved.
  • the ratio of the additive mixed in the pressure-sensitive adhesive may be about 30% or less. This is because the luminance may be lowered if it is about 30% or more. In some cases, the additive may not be mixed in the adhesive pattern 50.
  • the optical refractive index of the adhesive pattern 50 may be about 1.1 to about 1.65, because the luminance may be sharply reduced when the optical refractive index of the adhesive pattern 50 is about 1.65 or more.
  • the adhesive pattern 50 may have a diameter of about 25 ⁇ m to about 800 ⁇ m, for example, 50 ⁇ m to 300 ⁇ m. The reason is that when the diameter of the adhesion pattern 50 is about 25 ⁇ m or less, the adhesive force between the reflecting plate 10 and the light guide plate 30 is lowered, and when the diameter of the adhesive pattern 50 is about 800 ⁇ m or more, the light guide characteristics may be reduced.
  • the thickness of the adhesive pattern 50 may be about 3 ⁇ m or more. This is because by securing an air gap between the reflecting plate 10 and the light guide plate 30, the light efficiency can be improved by uniformly diffusing the light onto the light guide plate 30.
  • the adhesive patterns 50 may be arranged at predetermined intervals along the row direction and the column direction of the reflective plate 10 or the light guide plate 30.
  • the first row of adhesive patterns 50 and the second row of adhesive patterns 50 may be arranged to be offset from each other, or the first row of adhesive patterns 50 and the second row of adhesive
  • the patterns 50 may be arranged to be offset from each other.
  • the first row of adhesive patterns 50 and the second row of adhesive patterns 50 may be arranged in parallel with each other, or the first row of adhesive patterns 50 and the adjacent rows of adhesive patterns 50 Two rows of adhesive patterns 50 may be arranged in a line with each other.
  • the side surface of the adhesive pattern 50 may be formed to be inclined with respect to the surface of the reflective plate 10 or the light guide plate 30. This is because the refractive index of the light passing through the adhesive pattern 50 can be improved to uniformly diffuse the light onto the light guide plate 30.
  • the area ratio of the adhesive pattern 50 that occupies the upper surface of the reflector 10 or the lower surface of the light guide plate 30 may be higher in the area farther from the light source module 40 than in the area adjacent to the light source module 40. have. This is because the light can be uniformly diffused through the light guide plate 30, and the light efficiency can be improved.
  • the size of the adhesive pattern 50 that occupies the upper surface of the reflector 10 or the lower surface of the light guide plate 30 may be larger than the region adjacent to the light source module 40. .
  • the number of adhesive patterns 50 occupying the upper surface of the reflector 10 or the lower surface of the light guide plate 30 may be larger in the area farther from the light source module 40 than in the area adjacent to the light source module 40. Can be.
  • the distance between the adhesive patterns 50 occupying the upper surface of the reflector plate 10 or the lower surface of the light guide plate 30 is farther away from the light source module 40 than the region adjacent to the light source module 40. It can be narrower.
  • the light refractive index of the adhesive pattern 50 occupying the upper surface of the reflector 10 or the lower surface of the light guide plate 30 is farther away from the light source module 40 than the region adjacent to the light source module 40. Can be higher.
  • the mixing ratio of the additive mixed in the adhesive pattern 50 may be higher in the area farther from the light source module 40 than in the area adjacent to the light source module 40. This is because the refractive index of the light can be increased in a region far from the light source module 40 to uniformly diffuse the light.
  • the adhesion between the reflective plate 10 and the light guide plate 30 by the adhesive pattern 50 may be about 300 g / 25 mm to about 700 g / 25 mm or more.
  • an adhesive layer 80 may be formed between the reflective plate 10 and the exterior member 70.
  • the adhesive layer 80 may be made of the same material as the adhesive pattern 50 disposed between the reflecting plate 10 and the light guide plate 30.
  • the adhesive layer 80 may use a material different from that of the adhesive pattern 50 disposed between the reflective plate 10 and the light guide plate 30.
  • the adhesion between the reflective plate 10 and the exterior member 70 by the adhesive layer 80 may be about 300 g / 25 mm to about 700 g / 25 mm or more.
  • the adhesion between the reflective plate 10 and the exterior member 70 by the adhesive layer 80 may be different from the adhesion between the reflective plate 10 and the light guide plate 30 by the adhesive pattern 50.
  • the adhesion between the reflective plate 10 and the exterior member 70 may be greater than the adhesion between the reflective plate 10 and the light guide plate 30. This is because the exterior member 70 such as glass having excellent rigidity must be able to withstand external impacts.
  • FIG. 2 is a plan view illustrating an adhesive layer according to a first exemplary embodiment of the present invention and showing an adhesive pattern arranged on a lower surface of the light guide plate.
  • the pressure-sensitive adhesive layer including the pressure-sensitive adhesive pattern 50 may be disposed on the surface of the reflective plate or the light guide plate 30. That is, the light guide plate 30 may include a plurality of adhesive patterns 50 formed on the lower surface facing the reflective plate.
  • the plurality of adhesive patterns 50 may occupy about 15% to about 25% of the total area of the lower surface of the light guide plate 30. The reason is that if the adhesive patterns 50 are about 15% or less of the total area of the lower surface of the light guide plate 30, the uniformity of light is lowered, and about 25% of the total area of the lower surface of the light guide plate 30 is reduced. This is because the luminance can be lowered if it is above. That is, when the area occupied by the air gap formed between the adhesive patterns 50 is secured to a certain range, it is possible to secure the adhesive force between the reflecting plate and the light guide plate 30 without decreasing the uniformity and brightness of the light.
  • the adhesion patterns 50 may be arranged at predetermined intervals along the row direction and the column direction of the light guide plate 30, and the adhesion pattern 50 and the second column (a) of the first row A adjacent to each other may be arranged.
  • the adhesive patterns 50 of B) may be arranged to be offset from each other.
  • the adhesive pattern 50 of the first row and the adhesive pattern 50 of the second row that are adjacent to each other may also be arranged to be offset from each other.
  • the adhesive patterns 50 may be arranged at predetermined intervals along the row direction and the column direction of the light guide plate 30, and the adhesive patterns 50 and the second column A adjacent to each other may be arranged at predetermined intervals.
  • the adhesion patterns 50 in the row B may be arranged side by side with each other.
  • the adhesion pattern 50 in the first row and the adhesion pattern 50 in the second row may be arranged in parallel with each other.
  • the area ratio of the adhesive pattern 50 that occupies the lower surface of the light guide plate 30 includes a region adjacent to the light source module 40 and the light source module 40 among the lower surfaces of the light guide plate 30. Regions far from can be identical to each other.
  • the size of the adhesive pattern 50 may be the same as the area adjacent to the light source module 40 and the area far from the light source module 40 among the lower surfaces of the light guide plate 30.
  • the number of the adhesive patterns may be the same as the area adjacent to the light source module 40 and the area far from the light source module 40 among the lower surfaces of the light guide plate 30.
  • the distances d1 and d2 between the adhesive patterns 50 may have the same area adjacent to the light source module 40 and a region far from the light source module 40 among the lower surfaces of the light guide plate 30.
  • the light refractive index of the adhesive pattern 50 may be the same as the region adjacent to the light source module 40 and the region far from the light source module 40 among the lower surfaces of the light guide plate 30.
  • the adhesive pattern 50 may be at least one selected from an acrylic adhesive, a polysiloxane adhesive, and a polyester adhesive.
  • the pressure-sensitive adhesive pattern 50 may be a mixed material in which a predetermined additive is mixed in the pressure-sensitive adhesive, but the mixing ratio of the additive mixed in the pressure-sensitive adhesive pattern 50 is in the lower surface of the light guide plate 30.
  • the adhesive pattern 50 positioned in an area adjacent to the light source module 40 and the adhesive pattern 50 located in an area far from the light source module 40 may be identical to each other.
  • the pressure-sensitive adhesive may be at least one selected from acrylic pressure-sensitive adhesive, polysiloxane pressure-sensitive adhesive, polyester pressure-sensitive adhesive, the additive may be at least one of TiO 2 and silicon.
  • the structure can be simplified, the thickness can be reduced, and the light efficiency can be improved.
  • FIGS. 3 to 7 are diagrams illustrating an adhesive layer according to a second embodiment of the present invention
  • FIGS. 3 to 5 are plan views illustrating an adhesive pattern arranged on a lower surface of the light guide plate
  • FIGS. 6 and 7 are views between the light guide plate and the reflective plate. It is a side view which shows the adhesive pattern arrange
  • the light guide plate 30 may include a plurality of adhesive patterns 50 formed on a lower surface facing the reflective plate.
  • the area ratio of the adhesive pattern 50 that occupies the lower surface of the light guide plate 30 may increase in a gradient from the lower surface of the light guide plate 30 as it moves away from the light source module 40. The reason is to uniformly transmit the light from the region adjacent to the light source module 40 to the region far from the light source module 40. Therefore, the uniformity of the light transmitted to the upper portion of the light guide plate 30 may be improved.
  • the adhesive patterns 50 may occupy about 15% to about 25% of the total area of the lower surface of the light guide plate 30. The reason is that if the adhesive patterns 50 are about 15% or less of the total area of the lower surface of the light guide plate 30, the uniformity of light is lowered, and about 25% of the total area of the lower surface of the light guide plate 30 is reduced. This is because the luminance can be lowered if it is above. That is, when the area occupied by the air gap formed between the adhesive patterns 50 is secured to a certain range, it is possible to secure the adhesive force between the reflecting plate and the light guide plate 30 without decreasing the uniformity and brightness of the light.
  • the distances d3 and d4 between the adhesive patterns 50 that occupy the lower surface of the light guide plate 30 may be gradually narrowed away from the light source module 40.
  • the size of the adhesive pattern 50 that occupies the lower surface of the light guide plate 30 may increase in a gradient from the lower surface of the light guide plate 30 to a distance from the light source module 40. It may be.
  • the number of adhesive patterns 50 occupying the lower surface of the light guide plate 30 may increase in a gradient as the distance from the light source module 40 increases.
  • a plurality of adhesive patterns 50 may be formed between the reflective plate 10 and the light guide plate 30, and an air gap may be formed between the adhesive patterns 50 adjacent to each other.
  • the light refractive index of the adhesive pattern 50 may increase in a gradient as it moves away from the light source module 40.
  • the optical refractive index of the adhesive pattern 50-2 disposed in the area far from the light source module 40 is higher than the optical refractive index of the adhesive pattern 50-1 disposed in the area adjacent to the light source module 40. .
  • the reason is to uniformly transmit the light from the region adjacent to the light source module 40 to the region far from the light source module 40.
  • the uniformity of the light transmitted to the upper portion of the light guide plate 30 is increased by increasing the diffusion rate of light in the area far from the light source module 40. Can be improved.
  • the adhesive pattern 50 may be at least one selected from an acrylic adhesive, a polysiloxane adhesive, and a polyester adhesive.
  • a plurality of adhesive patterns 50 may be formed between the reflective plate 10 and the light guide plate 30, and an air gap may be formed between the adhesive patterns 50 adjacent to each other.
  • the adhesive pattern 50 may be a mixed material in which a predetermined additive 55 is mixed in the adhesive 53 at a predetermined ratio.
  • the mixing ratio of the additive 55 mixed in the adhesive pattern 50 may increase in a gradient as the adhesive pattern 50 moves away from the light source module 40.
  • the mixing ratio of the additive 55 of the adhesive pattern 50-2 disposed in the area far from the light source module 40 is equal to that of the adhesive pattern 50-1 disposed in the region adjacent to the light source module 40. Higher than the mixing ratio of the additives 55.
  • the additive 55 reflects the light to increase the diffusion of the light, so that the light is uniformly transmitted from the area adjacent to the light source module 40 to the area far from the light source module 40. That is, by increasing the light diffusion rate of the adhesive pattern 50 located in a region far from the light source module 40, the uniformity of light transmitted to the upper portion of the light guide plate 30 may be improved.
  • the adhesive 53 of the adhesive pattern 50 may be at least one selected from an acrylic adhesive, a polysiloxane adhesive, and a polyester adhesive, and the additive 55 may be at least one of TiO 2 and silicon. However, it is not limited thereto.
  • the area ratio of the adhesive pattern 50 occupying the lower surface of the light guide plate 30 is adjusted by adjusting the interval, size, and number of the adhesive pattern 50.
  • the lower surface of the as far away from the light source module 40 can be controlled to increase the gradient (gradient).
  • the density of the adhesion pattern is further increased in the area far from the light source than in the area adjacent to the light source, so that the light can be uniformly spread throughout.
  • the second embodiment of the present invention adjusts the light refractive index of the adhesive pattern 50 and the mixing ratio of the additives, thereby increasing the light diffusivity further in a region farther from the light source than in the region adjacent to the light source, thereby uniformizing the light as a whole. Can spread.
  • FIGS. 8 to 12 illustrate a pressure-sensitive adhesive layer according to a third exemplary embodiment of the present invention
  • FIGS. 8 to 10 are plan views illustrating a pressure-sensitive adhesive pattern arranged on a lower surface of the light guide plate
  • FIGS. 11 and 12 show a gap between the light guide plate and the reflector. It is a side view which shows the adhesive pattern arrange
  • the light guide plate 30 may include a plurality of adhesive patterns 50 formed on a lower surface facing the reflective plate.
  • the lower surface of the light guide plate 30 may include a first region 91 adjacent to the light source module 40 and a second region 92 far from the light source module 40.
  • An area ratio of the adhesive pattern 50 occupying 92 may be higher than an area ratio of the pattern 50 gradually occupying the first region 91.
  • the area ratio of the adhesive pattern 50 to occupy the first region 91 may be about 1% to about 10%
  • the area ratio of the adhesive pattern 50 to occupy the second region 92 may be: About 20%-about 49%. This is because the density of the adhesion pattern 50 can be made higher in the area far from the light source than in the area adjacent to the light source, so that the light can be uniformly diffused as a whole.
  • the interval d2 between the adhesive patterns 50 occupying the second region 92 of the light guide plate 30 is the adhesive pattern 50 occupying the first region 91 of the light guide plate 30. It may be narrower than the distance d1 between the).
  • the size of the adhesive pattern 50 occupying the second region 92 of the light guide plate 30 is the adhesive pattern 50 occupying the first region 91 of the light guide plate 30. It may be larger than the size of.
  • the ratio of the size of the adhesive pattern 50 to the first region 91 and the size of the adhesive pattern 50 to the second region 92 may be about 0.5: 1 to about 0.9: 1. .
  • the number of adhesive patterns 50 occupying the second region 92 of the light guide plate 30 is the adhesive patterns 50 occupying the first region 91 of the light guide plate 30. May be more than the number of.
  • the ratio of the number of adhesive patterns 50 occupying the first region 91 and the number of adhesive patterns 50 occupying the second region 92 may be about 0.5: 1 to about 0.9: 1. .
  • a plurality of adhesive patterns 50 may be formed between the reflective plate 10 and the light guide plate 30, and an air gap may be formed between the adhesive patterns 50 adjacent to each other.
  • the optical refractive index of the adhesive pattern 50 occupying the second region 92 of the light guide plate 30 may be greater than the optical refractive index of the adhesive pattern 50 occupying the first region 91 of the light guide plate 30.
  • the optical refractive index of the adhesive pattern 50-2 disposed in the second region 91 is higher than the optical refractive index of the adhesive pattern 50-1 disposed in the region adjacent to the light source module 40.
  • the reason for this is to uniformly transmit light from the light source module 40 to the second region 92 far from the light source module 40 in the first region 91 adjacent to the light source module 40. That is, by increasing the refractive index of the adhesive pattern 50 positioned in the second region 92 far from the light source module 40, the light guide plate is increased by increasing the diffusion rate of light in the second region 92 far from the light source module 40. The uniformity of the light transmitted to the upper portion of 30 may be improved.
  • the adhesive pattern 50 may be at least one selected from an acrylic adhesive, a polysiloxane adhesive, and a polyester adhesive.
  • a plurality of adhesive patterns 50 may be formed between the reflective plate 10 and the light guide plate 30, and an air gap may be formed between the adhesive patterns 50 adjacent to each other.
  • the adhesive pattern 50 may be a mixed material in which a predetermined additive 55 is mixed in the adhesive 53 at a predetermined ratio. And the ratio of the additive 55 mixed in the adhesive pattern 50 which occupies the 2nd area
  • the mixing ratio of the additive 55 of the adhesive pattern 50-2 disposed in the second region 92 far from the light source module 40 is in the first region 91 adjacent to the light source module 40. It is higher than the mixing ratio of the additive 55 of the adhesion pattern 50-1 arrange
  • the reason is that since the additive 55 reflects the light to increase the diffusion of the light, the light is transferred from the first area 91 adjacent to the light source module 40 to the second area 92 away from the light source module 40. To deliver uniformly. That is, by increasing the light diffusion rate of the adhesive pattern 50 positioned in the second region 92 far from the light source module 40, the uniformity of light transmitted to the upper portion of the light guide plate 30 may be improved.
  • the adhesive 53 of the adhesive pattern 50 may be at least one selected from an acrylic adhesive, a polysiloxane adhesive, and a polyester adhesive, and the additive 55 may be at least one of TiO 2 and silicon. However, it is not limited thereto.
  • the density of the adhesion pattern is further increased in the second region far from the light source than in the first region adjacent to the light source, so that the light can be uniformly diffused as a whole.
  • the third embodiment of the present invention by adjusting the light refractive index of the adhesive pattern 50 and the mixing ratio of the additive, to further increase the light diffusion rate in the second region far from the light source than the first region adjacent to the light source,
  • the light can be spread uniformly throughout.
  • FIGS. 13 to 17 illustrate a pressure-sensitive adhesive layer according to a fourth exemplary embodiment of the present invention.
  • FIGS. 13 to 15 are plan views illustrating a pressure-sensitive adhesive pattern arranged on a lower surface of the light guide plate, and FIGS. 16 and 17 show a gap between the light guide plate and the reflector. It is a side view which shows the adhesive pattern arrange
  • the light guide plate 30 may include a plurality of adhesive patterns 50 formed on a lower surface facing the reflecting plate.
  • the lower surface of the light guide plate 30 is a third region 93 disposed between the first region 91 adjacent to the light source module 40 and the second region 92 far from the light source module 40. It may include.
  • the area ratio of the adhesive pattern 50 to occupy the first region 91 may be about 1% to about 10%
  • the area ratio of the adhesive pattern 50 to occupy the third region 93 may be: About 10% to about 20%
  • the area ratio of the adhesive pattern 50 to occupy the second region 92 may be about 20% to about 49%. This is because the density of the adhesion pattern 50 can be made higher in the area far from the light source than in the area adjacent to the light source, so that the light can be uniformly diffused as a whole.
  • the interval d3 between the adhesive patterns 50 occupying the third region 93 of the light guide plate 30 is the adhesive pattern 50 occupying the first region 91 of the light guide plate 30.
  • the gaps may be narrower than the gap d1 between the gaps) and wider than the gap d2 between the adhesion patterns 50 occupying the second area 92 of the light guide plate 30.
  • the size of the adhesive pattern 50 occupying the third region 93 of the light guide plate 30 is the adhesive pattern 50 occupying the first region 91 of the light guide plate 30. It may be larger than the size of, and smaller than the size of the adhesive pattern 50 occupying the second area 92 of the light guide plate 30.
  • the ratio of the size of the adhesive pattern 50 to the first region 91 and the size of the adhesive pattern 50 to the third region 93 may be about 0.5: 1 to about 0.9: 1.
  • the ratio of the size of the adhesive pattern 50 to the third region 93 and the size of the adhesive pattern 50 to the second region 92 may be about 0.5: 1 to about 0.9: 1.
  • the number of adhesive patterns 50 occupying the third region 93 of the light guide plate 30 is the adhesive patterns 50 occupying the first region 91 of the light guide plate 30. It may be greater than the number of, and may be less than the number of adhesive patterns 50 occupying the second region 92 of the light guide plate 30.
  • the ratio of the number of adhesive patterns 50 occupying the first region 91 and the number of adhesive patterns 50 occupying the third region 93 may be about 0.5: 1 to about 0.9: 1.
  • the ratio of the number of adhesive patterns 50 occupying the third region 93 and the number of adhesive patterns 50 occupying the second region 92 may be about 0.5: 1 to about 0.9: 1.
  • a plurality of adhesive patterns 50 may be formed between the reflective plate 10 and the light guide plate 30, and an air gap may be formed between the adhesive patterns 50 adjacent to each other.
  • the optical refractive index of the adhesive pattern 50 occupying the third region 93 of the light guide plate 30 is greater than the optical refractive index of the adhesive pattern 50 occupying the first region 91 of the light guide plate 30,
  • the light refractive index of the pressure-sensitive adhesive pattern 50 may occupy the second region 92 of the light guide plate 30.
  • the reason is that by increasing the refractive index of the adhesive pattern 50 located in the area far from the light source module 40, the diffusion rate of light in the area far from the light source module 40 is increased to be transmitted to the upper portion of the light guide plate 30. Uniformity of light can be improved.
  • the adhesive pattern 50 may be at least one selected from an acrylic adhesive, a polysiloxane adhesive, and a polyester adhesive.
  • a plurality of adhesive patterns 50 may be formed between the reflective plate 10 and the light guide plate 30, and an air gap may be formed between the adhesive patterns 50 adjacent to each other.
  • the adhesive pattern 50 may be a mixed material in which a predetermined additive 55 is mixed in the adhesive 53 at a predetermined ratio.
  • the ratio of the additive 55 mixed in the adhesive pattern 50 occupying the third region 93 of the light guide plate 30 is equal to the adhesive pattern 50 occupying the first region 91 of the light guide plate 30. It may be higher than the ratio of the additive 55 to be mixed and lower than the ratio of the additive 55 to be mixed in the adhesive pattern 50 occupying the second region 92 of the light guide plate 30.
  • the additive 55 reflects the light to increase the diffusion of the light, so that the light is uniformly transmitted from the area adjacent to the light source module 40 to the area far from the light source module 40. That is, by increasing the light diffusion rate of the adhesive pattern 50 located in a region far from the light source module 40, the uniformity of light transmitted to the upper portion of the light guide plate 30 may be improved.
  • the adhesive 53 of the adhesive pattern 50 may be at least one selected from an acrylic adhesive, a polysiloxane adhesive, and a polyester adhesive, and the additive 55 may be at least one of TiO 2 and silicon. However, it is not limited thereto.
  • the density of the adhesive pattern is further increased in the area far from the light source than in the area adjacent to the light source, and the light can be uniformly diffused throughout.
  • the fourth embodiment of the present invention adjusts the light refractive index of the adhesive pattern 50 and the mixing ratio of the additives to further increase the light diffusion rate in a region farther from the light source than in the region adjacent to the light source, thereby uniformizing the light as a whole. Can spread.
  • 18 is a side view showing the shape of the adhesive pattern according to the present invention.
  • the cross section of the adhesive pattern 50 may be manufactured in various shapes such as hemispherical shape, square shape, and trapezoidal shape.
  • the side surface of the adhesive pattern 50 may be formed to be inclined with respect to the surface of the light guide plate 30. This is because the refractive index of the light passing through the adhesive pattern 50 can be improved to uniformly diffuse the light onto the light guide plate 30.
  • the light refractive index of the adhesive pattern 50 may be about 1.1 to about 1.65, since the brightness may be sharply lowered when the light refractive index of the adhesive pattern 50 is about 1.65 or more.
  • the diameter D of the adhesive pattern 50 may be about 25um to about 800um, for example, may be applied to 50um-300um. The reason is that when the diameter of the adhesion pattern 50 is about 25 ⁇ m or less, the adhesive force between the reflecting plate 10 and the light guide plate 30 is lowered, and when the diameter of the adhesive pattern 50 is about 800 ⁇ m or more, the light guide characteristics may be reduced.
  • the upper diameter D1 of the pressure-sensitive adhesive pattern 50 and the lower diameter D2 of the pressure-sensitive adhesive pattern 50 may be the same, but may be different from each other in some cases.
  • the thickness t of the adhesive pattern 50 may be about 3 ⁇ m or more. This is because by securing an air gap between the reflecting plate 10 and the light guide plate 30, the light efficiency can be improved by uniformly diffusing the light onto the light guide plate 30.
  • 19 and 20 are diagrams illustrating an adhesive layer according to a fifth exemplary embodiment of the present invention, and a plan view illustrating an adhesive pattern arranged on a lower surface of the light guide plate.
  • the light guide plate 30 may include a plurality of adhesive patterns 50 formed on a lower surface facing the reflective plate.
  • a bridge 57 connecting the adhesive patterns 50 may be disposed between the adhesive patterns 50.
  • an air gap 60 may be formed between the bridges 57.
  • the bridge 57 may be made of the same material as the adhesive pattern 50, but may be different from each other.
  • the bridge 57 may be at least one selected from an acrylic pressure sensitive adhesive, a polysiloxane pressure sensitive adhesive, and a polyester pressure sensitive adhesive.
  • the reason for forming the bridge 57 is that not only can the adhesion between the reflecting plate and the light guide plate be improved, but also the light efficiency can be increased by increasing the light diffusion.
  • FIG. 19 is an embodiment in which the density of the adhesion pattern 50 in the area adjacent to the light source module 40 and the area far from the light source module 40 is the same, and FIG. 20 shows the light source module rather than the area adjacent to the light source module 40.
  • the embodiment has a higher density of the adhesive pattern 50 in the region far from 40.
  • FIG. 21 to 23 show a pressure-sensitive adhesive layer according to a sixth embodiment of the present invention
  • FIG. 21 is a perspective view of the pressure-sensitive adhesive layer
  • FIG. 22 is a cross-sectional view of the pressure-sensitive adhesive layer
  • FIG. 23 is a plan view of the pressure-sensitive adhesive layer.
  • an adhesive layer 100 having a plurality of holes 110 may be formed between the reflective plate 10 and the light guide plate 30.
  • the plurality of holes 110 may occupy about 15% to about 25% of the total area of the adhesive layer 100. The reason is that if the holes 110 are about 15% or less of the total area of the adhesive layer 100, the luminance is lowered. If the holes 110 are about 25% or more of the total area of the adhesive layer 100, the uniformity of light is This can be lowered. That is, when the area occupied by the air gap 60 formed in the holes 110 is secured to a certain range, it is possible to secure the adhesive force between the reflecting plate and the light guide plate 30 without decreasing the uniformity and brightness of the light.
  • the holes 110 may be arranged at predetermined intervals along the row direction and the column direction of the adhesive layer 100.
  • the holes 110 and the second column B of the first column A adjacent to each other may be arranged.
  • Holes 110) may be arranged to be offset from each other.
  • the holes 110 in the first row and the holes 110 in the second row adjacent to each other may be arranged to be offset from each other.
  • the holes 110 may be arranged at predetermined intervals along the row direction and the column direction of the adhesive layer 100, and the holes 110 and the second row of the first row A adjacent to each other may be arranged.
  • the holes 110 in (B) may be arranged side by side with each other.
  • the holes 110 in the first row and the holes 110 in the second row adjacent to each other may also be arranged side by side.
  • the area ratio of the holes 110 occupying the adhesive layer 100 may be the same as the area adjacent to the light source module 40 and the area far from the light source module 40.
  • the size of the hole 110 may be the same as the area adjacent to the light source module 40 and the area far from the light source module 40.
  • the number of the holes 110 may be the same as the area adjacent to the light source module 40 and the area far from the light source module 40.
  • the distances d1 and d2 between the holes 110 may be the same as the area adjacent to the light source module 40 and the area far from the light source module 40.
  • the light refractive index of the adhesive layer 100 may be the same as the region adjacent to the light source module 40 and the region far from the light source module 40.
  • the pressure-sensitive adhesive layer 100 may be at least one selected from acrylic pressure sensitive adhesive, polysiloxane pressure sensitive adhesive, and polyester pressure sensitive adhesive.
  • the adhesive layer 100 may be a mixed material in which a predetermined additive is mixed in a pressure-sensitive adhesive, but the mixing ratio of the additive mixed in the adhesive layer 100 is a region adjacent to the light source module 40.
  • the area far from the light source module 40 may be identical to each other.
  • the pressure-sensitive adhesive may be at least one selected from acrylic pressure-sensitive adhesive, polysiloxane pressure-sensitive adhesive, polyester pressure-sensitive adhesive, the additive may be at least one of TiO 2 and silicon.
  • an adhesive layer having a plurality of holes which are air gaps, may be disposed between the light guide plate and the reflecting plate, thereby simultaneously improving adhesion and light efficiency and simplifying the process.
  • FIGS. 24 to 28 are views illustrating an adhesive layer according to a seventh embodiment of the present invention
  • FIGS. 24 to 26 are plan views illustrating an adhesive pattern arranged on a lower surface of the light guide plate
  • FIGS. 27 and 28 are between the light guide plate and the reflecting plate. It is a side view which shows the adhesive pattern arrange
  • the adhesive layer 100 may include a plurality of holes 110.
  • the area ratio of the holes 110 occupying the adhesive layer 100 may increase in a gradient as the distance from the light source module 40 increases. The reason is to uniformly transmit the light from the region adjacent to the light source module 40 to the region far from the light source module 40.
  • the holes 110 may occupy about 15% to about 25% of the total area of the adhesive layer 100. The reason is that if the holes 110 are about 15% or less of the total area of the adhesive layer 100, the luminance is lowered. If the holes 110 are about 25% or more of the total area of the adhesive layer 100, the uniformity of light is This can be lowered. That is, when the area occupied by the air gap formed in the hole 110 is secured to a certain range, it is possible to secure the adhesive force between the reflecting plate and the light guide plate without lowering the uniformity and brightness of the light.
  • the distances d3 and d4 between the holes 110 occupying the adhesive layer 100 may be narrower as the distance from the light source module 40 increases.
  • the size of the hole 110 occupying the adhesive layer 100 may increase in a gradient as the distance from the light source module 40 increases.
  • the number of holes 110 occupying the adhesive layer 100 may increase in a gradient as the distance from the light source module 40 increases.
  • an adhesive layer 100 having a plurality of holes 110 is formed between the reflecting plate 10 and the light guide plate 30, and an air gap may be formed in the hole 110.
  • the optical refractive index of the adhesive layer 100 may increase in a gradient as it moves away from the light source module 40.
  • the optical refractive index of the adhesive layer 100 in the region far from the light source module 40 is higher than the optical refractive index of the adhesive layer 100 in the region adjacent to the light source module 40. The reason is to uniformly transmit the light from the region adjacent to the light source module 40 to the region far from the light source module 40.
  • the uniformity of the light transmitted to the upper portion of the light guide plate may be improved by increasing the diffusion rate of light in the area far from the light source module 40. Can be.
  • the adhesive layer 100 may be at least one selected from an acrylic adhesive, a polysiloxane adhesive, and a polyester adhesive.
  • the adhesive layer 100 may be a mixed material in which a predetermined additive 55 is mixed in the adhesive 53 in a predetermined ratio.
  • the mixing ratio of the additives 55 mixed in the adhesive layer 100 may increase in a gradient as the distance from the light source module 40 increases.
  • the mixing ratio of the additive 55 of the adhesive layer 100 in the region far from the light source module 40 is greater than the mixing ratio of the additive 55 in the adhesive layer 100 in the region adjacent to the light source module 40.
  • the additive 55 reflects the light to increase the diffusion of the light, so that the light is uniformly transmitted from the area adjacent to the light source module 40 to the area far from the light source module 40. That is, by increasing the light diffusion rate of the adhesive pattern 50 located in a region far from the light source module 40, the uniformity of light transmitted to the upper portion of the light guide plate may be improved.
  • the pressure sensitive adhesive 53 of the pressure sensitive adhesive layer 100 may be at least one selected from acrylic pressure sensitive adhesive, polysiloxane pressure sensitive adhesive, and polyester pressure sensitive adhesive, and the additive 55 may be at least one of TiO 2 and silicon. However, it is not limited thereto.
  • the distance, size, and number of the holes 110 are adjusted so that the ratio of the area of the holes 110 occupying the adhesive layer 100 is farther away from the light source module 40. Can be controlled to increase.
  • the density of the holes can be made higher in the area far from the light source than in the area adjacent to the light source, so that the light can be uniformly spread throughout.
  • the present invention can adjust the light refractive index of the pressure-sensitive adhesive layer and the mixing ratio of the additives to further increase the light diffusion rate in a region farther from the light source than in the region adjacent to the light source, thereby spreading the light uniformly as a whole.
  • 29 is a view showing an adhesive layer according to an eighth embodiment of the present invention.
  • the adhesive layer 100 may include a first region 91 adjacent to the light source module 40 and a second region 92 far from the light source module 40.
  • An area ratio of the holes 110 occupying the second region 92 may be higher than an area ratio of the holes 110 occupying the first region 91.
  • the area ratio of the holes 110 occupying the first region 91 may be about 1% to about 10%
  • the area ratio of the holes 110 occupying the second region 92 is about 20. %-About 49%. This is because the density of the holes 110 can be made higher in the area far from the light source than in the area adjacent to the light source, so that light can be uniformly diffused as a whole.
  • the interval between the holes 110 occupying the second region 92 of the adhesive layer 100 may be narrower than the interval between the holes 110 occupying the first region 91 of the adhesive layer 100. have.
  • the diameter of the hole 110 occupying the second region 92 of the adhesive layer 100 may be larger than the diameter of the hole 110 occupying the first region 91 of the adhesive layer 100.
  • the ratio of the diameter of the hole 110 occupying the first region 91 and the diameter of the hole 110 occupying the second region 92 may be about 0.5: 1 to about 0.9: 1.
  • the number of holes 110 occupying the second region 92 of the adhesive layer 100 may be greater than the number of holes 110 occupying the first region 91 of the adhesive layer 100.
  • a ratio of the number of holes 110 occupying the first region 91 and the number of holes 110 occupying the second region 92 may be about 0.5: 1 to about 0.9: 1.
  • the optical refractive index of the second region 92 of the adhesive layer 100 may be greater than the optical refractive index of the first region 91 of the adhesive layer 100.
  • the optical refractive index of the adhesive layer 100 of the second region 91 is higher than the optical refractive index of the adhesive layer 100 of the region adjacent to the light source module 40.
  • the reason for this is to uniformly transmit light from the light source module 40 to the second region 92 far from the light source module 40 in the first region 91 adjacent to the light source module 40. That is, by increasing the refractive index of the adhesive layer 100 positioned in the second region 92 far from the light source module 40, the light guide plate is increased by increasing the diffusion rate of light in the second region 92 far from the light source module 40. The uniformity of the light delivered to the top of the can be improved.
  • the adhesive layer 100 may be at least one selected from an acrylic adhesive, a polysiloxane adhesive, and a polyester adhesive.
  • the adhesive layer 100 may be a mixed material in which a predetermined additive is mixed in a pressure-sensitive adhesive.
  • the ratio of the additive mixed in the adhesive layer 100 of the second region may be higher than the ratio of the additive mixed in the adhesive layer 100 of the first region 91.
  • the mixing ratio of the additive of the adhesive layer 100 in the second region 92 far from the light source module 40 is an additive of the adhesive layer 100 in the first region 91 adjacent to the light source module 40. Is higher than the mixing ratio. The reason is that since the additive reflects the light and increases the diffusion of the light, the light is uniformly transmitted from the first region 91 adjacent to the light source module 40 to the second region 92 far from the light source module 40. To do this. That is, by increasing the light diffusion rate of the adhesive layer 100 positioned in the second region 92 far from the light source module 40, the uniformity of light transmitted to the upper portion of the light guide plate may be improved.
  • the pressure-sensitive adhesive of the pressure-sensitive adhesive layer 100 may be at least one selected from acrylic pressure-sensitive adhesives, polysiloxane pressure-sensitive adhesives, polyester pressure-sensitive adhesives, and the additive may be at least one of TiO 2 and silicon, but is not limited thereto. Do not.
  • the present invention can increase the density of the holes 110 in the second region farther from the light source than in the first region adjacent to the light source, so that the light can be uniformly spread throughout.
  • the present invention by adjusting the light refractive index and the mixing ratio of the additive of the adhesive layer 100, by increasing the light diffusion rate in the second region far from the light source than the first region adjacent to the light source, the light uniformly as a whole Can spread.
  • FIG. 30 is a view showing an adhesive layer according to a ninth embodiment of the present invention.
  • the adhesive layer 100 includes a third region disposed between the first region 91 adjacent to the light source module 40 and the second region 92 far from the light source module 40.
  • Region 93 may be included.
  • the area ratio of the holes 110 occupying the first region 91 may be about 1% to about 10%
  • the area ratio of the holes 110 occupying the third region 93 is about 10. % To about 20%
  • the area ratio of the holes 110 to occupy the second area 92 may be about 20% to about 49%. This is because the density of the holes 110 can be made higher in the area far from the light source than in the area adjacent to the light source, so that light can be uniformly diffused as a whole.
  • the interval d3 between the holes 110 occupying the third region 93 of the adhesive layer 100 is greater than the interval d1 between the holes 110 occupying the first region 91 of the adhesive layer 100. It may be narrower and wider than the distance d2 between the holes 110 occupying the second region 92 of the adhesive layer 100.
  • the diameter of the hole 110 occupying the third region 93 of the adhesive layer 100 is larger than the diameter of the hole 110 occupying the first region 91 of the adhesive layer 100, It may be smaller than the diameter of the hole 110 occupying the second region 92 of 100.
  • the ratio of the diameter of the hole 110 occupying the first region 91 and the diameter of the hole 110 occupying the third region 93 may be about 0.5: 1 to about 0.9: 1.
  • the ratio of the diameter of the hole 110 occupying the three regions 93 and the diameter of the hole 110 occupying the second region 92 may be about 0.5: 1 to about 0.9: 1.
  • the number of holes 110 occupying the third region 93 of the adhesive layer 100 is greater than the number of holes 110 occupying the first region 91 of the adhesive layer 100, and the adhesive layer It may be less than the number of holes 110 occupying the second area 92 of the 100.
  • a ratio of the number of holes 110 occupying the first region 91 and the number of holes 110 occupying the third region 93 may be about 0.5: 1 to about 0.9: 1.
  • the ratio of the number of the holes 110 occupying the three regions 93 and the number of the holes 110 occupying the second region 92 may be about 0.5: 1 to about 0.9: 1.
  • the light refractive index of the pressure-sensitive adhesive layer 100 of the third region 93 is larger than the light refractive index of the pressure-sensitive adhesive layer 100 of the first region 91, and the pressure-sensitive adhesive layer 100 of the second region 92. It may be smaller than the optical refractive index of. The reason is that by increasing the refractive index of the adhesive layer 100 located in a region far from the light source module 40, the uniformity of the light transmitted to the upper portion of the light guide plate is increased by increasing the diffusion rate of light in the region far from the light source module 40. Can be improved.
  • the adhesive layer 100 may be at least one selected from an acrylic adhesive, a polysiloxane adhesive, and a polyester adhesive.
  • the adhesive layer 100 may be a mixed material in which a predetermined additive is mixed in a pressure-sensitive adhesive.
  • the proportion of the additive mixed in the pressure-sensitive adhesive layer 100 of the third region 93 is higher than the ratio of the additive mixed in the pressure-sensitive adhesive layer 100 of the first region 91 and the second region 92. It may be lower than the ratio of the additive mixed in the adhesive layer 100 of the. This is because the additive reflects the light and increases the diffusion of the light, so that the light is uniformly transmitted from the region adjacent to the light source module 40 to the region far from the light source module 40. That is, by increasing the light diffusion rate of the adhesive layer 100 located in a region far from the light source module 40, the uniformity of light transmitted to the upper portion of the light guide plate may be improved.
  • the pressure-sensitive adhesive of the pressure-sensitive adhesive layer 100 may be at least one selected from acrylic pressure-sensitive adhesives, polysiloxane pressure-sensitive adhesives, polyester pressure-sensitive adhesives, and the additive may be at least one of TiO 2 and silicon, but is not limited thereto. Do not.
  • the present invention can increase the density of the holes 110 in a region far from the light source than in the region adjacent to the light source, thereby allowing the light to be uniformly spread throughout.
  • the light diffusion rate is further increased in a region farther from the light source than in the region adjacent to the light source, thereby making it possible to uniformly diffuse the light as a whole.
  • 31 is an exploded view showing a display device using the backlight unit according to the present invention.
  • the display apparatus 300 may include a display panel 200 and a backlight unit that irradiates light onto the display panel 200.
  • the backlight unit may include a reflector 10, a light guide plate 30, an optical member 20, and a light source module disposed on the side surface of the light guide plate 30.
  • the display panel 200 may include a lower polarizer 201, a circuit board 202, a liquid crystal layer 203, a color filter layer 204, and an upper polarizer 205.
  • a plurality of adhesive patterns and an air gap are formed between the reflecting plate 10 and the light guide plate 30 to bond the reflecting plate 10 and the light guide plate 30 to improve the light diffusion rate.
  • the plurality of adhesive patterns may occupy about 15% to about 25% of the total area of the lower surface of the light guide plate 30. The reason is that if the adhesive patterns are about 15% or less of the total area of the lower surface of the light guide plate 30, the uniformity of light is lowered, and if it is about 25% or more of the total area of the lower surface of the light guide plate 30, This is because the luminance may be lowered.
  • an adhesive layer having a plurality of holes may be formed between the reflective plate 10 and the light guide plate 30 to bond the reflective plate 10 and the light guide plate 30 to improve the light diffusion rate.
  • the plurality of holes may occupy about 15% to about 25% of the total area of the adhesive layer. The reason is that if the holes are about 15% or less of the total area of the adhesive layer, the brightness is lowered. If the holes are about 25% or more of the total area of the lower surface of the light guide plate 30, the uniformity of light may be lowered. Because.
  • an adhesive layer may be formed between the reflective plate 10 and the exterior member 70.
  • the adhesive layer may use the same material as the adhesive pattern disposed between the reflecting plate 10 and the light guide plate 30.
  • the pressure-sensitive adhesive layer may use a material different from that of the pressure-sensitive adhesive pattern disposed between the reflective plate 10 and the light guide plate 30.
  • the display device using the backlight of the present invention the luminance is uniform as a whole, the image quality of the image can be improved.
  • the display device can be made slim and large in area, it is possible to apply a small mobile terminal to a large TV.
  • the present invention is used in the field related to the backlight unit and the display device using the same.

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)

Abstract

La présente invention concerne une unité de rétroéclairage et un dispositif d'affichage utilisant ladite unité de rétroéclairage. L'unité de rétroéclairage comprend une plaque réfléchissante, une plaque de guidage de lumière placée sur la plaque réfléchissante, un élément optique placé sur la plaque de guidage de lumière, et un module de source de lumière placé sur un côté de la plaque de guidage de lumière, une pluralité de motifs d'adhérence pouvant être formée entre la plaque réfléchissante et la plaque de guidage de lumière. Le dispositif d'affichage utilisant l'unité de rétroéclairage comprend un panneau d'affichage, et une unité de rétroéclairage permettant d'irradier de la lumière vers le panneau d'affichage, l'unité de rétroéclairage comprenant une plaque réfléchissante, une plaque de guidage de lumière placée sur la plaque réfléchissante, un élément optique placé sur la plaque de guidage de lumière, et un module de source de lumière placé sur un côté de la plaque de guidage de lumière, une pluralité de motifs d'adhérence pouvant être formée entre la plaque réfléchissante et la plaque de guidage de lumière.
PCT/KR2016/009184 2016-05-26 2016-08-19 Unité de rétroéclairage et dispositif d'affichage utilisant ladite unité de rétroéclairage WO2017204413A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020160064952A KR102504351B1 (ko) 2016-05-26 2016-05-26 백라이트 유닛 및 그를 이용한 디스플레이 장치
KR10-2016-0064952 2016-05-26

Publications (1)

Publication Number Publication Date
WO2017204413A1 true WO2017204413A1 (fr) 2017-11-30

Family

ID=60412430

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2016/009184 WO2017204413A1 (fr) 2016-05-26 2016-08-19 Unité de rétroéclairage et dispositif d'affichage utilisant ladite unité de rétroéclairage

Country Status (2)

Country Link
KR (1) KR102504351B1 (fr)
WO (1) WO2017204413A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113168050A (zh) * 2018-12-06 2021-07-23 日东电工株式会社 光学层叠体

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200024982A (ko) 2018-08-28 2020-03-10 삼성디스플레이 주식회사 백라이트 유닛 및 이를 구비한 표시 장치
TW202141095A (zh) * 2020-03-27 2021-11-01 日商日東電工股份有限公司 光學構件以及使用該光學構件之背光單元及影像顯示裝置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101082907B1 (ko) * 2004-02-18 2011-11-11 삼성전자주식회사 백라이트 어셈블리 및 이를 갖는 액정 표시 장치
KR20110123183A (ko) * 2010-05-06 2011-11-14 엘지디스플레이 주식회사 백라이트 유닛 및 이를 구비한 액정표시장치
KR20120037672A (ko) * 2010-10-12 2012-04-20 엘지디스플레이 주식회사 백라이트 유닛 및 액정표시장치
KR20150094486A (ko) * 2014-08-07 2015-08-19 주식회사스마트엘이디 도광판용 시트 결합체
WO2015152498A1 (fr) * 2014-04-03 2015-10-08 주식회사 에이치지엠 Unité de plaque de guidage de lumière ayant un élément de diffusion de lumière complexe et son procédé de fabrication

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101082907B1 (ko) * 2004-02-18 2011-11-11 삼성전자주식회사 백라이트 어셈블리 및 이를 갖는 액정 표시 장치
KR20110123183A (ko) * 2010-05-06 2011-11-14 엘지디스플레이 주식회사 백라이트 유닛 및 이를 구비한 액정표시장치
KR20120037672A (ko) * 2010-10-12 2012-04-20 엘지디스플레이 주식회사 백라이트 유닛 및 액정표시장치
WO2015152498A1 (fr) * 2014-04-03 2015-10-08 주식회사 에이치지엠 Unité de plaque de guidage de lumière ayant un élément de diffusion de lumière complexe et son procédé de fabrication
KR20150094486A (ko) * 2014-08-07 2015-08-19 주식회사스마트엘이디 도광판용 시트 결합체

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113168050A (zh) * 2018-12-06 2021-07-23 日东电工株式会社 光学层叠体

Also Published As

Publication number Publication date
KR102504351B1 (ko) 2023-02-28
KR20170133757A (ko) 2017-12-06

Similar Documents

Publication Publication Date Title
WO2013055020A1 (fr) Ensemble optique, unité de retro-éclairage équipée de celui-ci et appareil d'affichage associé
WO2018212436A1 (fr) Unité de rétroéclairage et élément de commande de flux lumineux pour gradation locale
WO2012138038A1 (fr) Élément optique et dispositif d'affichage contenant ledit élément
WO2011025175A2 (fr) Unité de rétroéclairage et dispositif d'affichage
WO2011132833A1 (fr) Appareil d'affichage
WO2011025172A2 (fr) Unité de rétroéclairage et dispositif d'affichage
WO2010140749A1 (fr) Unité de rétroéclairage à del et dispositif d'affichage
WO2012161395A1 (fr) Élément optique, dispositif d'affichage le comprenant, et procédé de fabrication correspondant
WO2011115351A1 (fr) Unité de rétroéclairage et appareil d'affichage la comportant
WO2010150965A1 (fr) Ensemble optique, unite de compensation de contre-jour comportant un tel ensemble, et appareil d’affichage comprenant l’unite de compensation de contre-jour
WO2010126226A2 (fr) Unité de rétroéclairage et dispositif d'affichage l'utilisant
WO2010027240A2 (fr) Feuille optique et feuille composite avec frange de moiré, et ensemble rétroéclairage doté de celles-ci
WO2021080245A1 (fr) Dispositif d'affichage ayant une taille de cadre réduite
WO2017204413A1 (fr) Unité de rétroéclairage et dispositif d'affichage utilisant ladite unité de rétroéclairage
WO2019059605A2 (fr) Module intégré de feuille optique et unité de rétroéclairage le comprenant
WO2020055026A1 (fr) Unité de rétroéclairage et dispositif d'affichage comprenant celle-ci
WO2019132367A1 (fr) Feuille de diffusion ayant une performance de protection améliorée et unité de rétroéclairage la comprenant
WO2016204340A1 (fr) Plaque de guidage de lumière à motif complexe et procédé de fabrication associé
WO2012091255A1 (fr) Appareil d'affichage
WO2011013889A1 (fr) Unité de rétroéclairage et appareil d'affichage la comprenant
WO2021162142A1 (fr) Dispositif d'affichage
WO2020130497A1 (fr) Dispositif d'affichage
WO2020027609A1 (fr) Dispositif d'affichage
WO2020017737A1 (fr) Dispositif d'affichage à cristaux liquides
WO2017222156A1 (fr) Dispositif d'affichage

Legal Events

Date Code Title Description
NENP Non-entry into the national phase

Ref country code: DE

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16903261

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 16903261

Country of ref document: EP

Kind code of ref document: A1