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WO2019135455A1 - Dispositif d'affichage - Google Patents

Dispositif d'affichage Download PDF

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Publication number
WO2019135455A1
WO2019135455A1 PCT/KR2018/007474 KR2018007474W WO2019135455A1 WO 2019135455 A1 WO2019135455 A1 WO 2019135455A1 KR 2018007474 W KR2018007474 W KR 2018007474W WO 2019135455 A1 WO2019135455 A1 WO 2019135455A1
Authority
WO
WIPO (PCT)
Prior art keywords
guide plate
light guide
region
area
light
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/KR2018/007474
Other languages
English (en)
Korean (ko)
Inventor
김근환
김민호
정주영
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LG Electronics Inc
Original Assignee
LG Electronics Inc
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 LG Electronics Inc filed Critical LG Electronics Inc
Publication of WO2019135455A1 publication Critical patent/WO2019135455A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer
    • 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
    • G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
    • 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
    • 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
    • G02F1/133524—Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides

Definitions

  • the present invention relates to a display device.
  • PDP electro luminescent display
  • VFD vacuum fluorescent display
  • PDP liquid crystal display
  • a liquid crystal panel of an LCD includes a TFT substrate and a color filter substrate facing each other with a liquid crystal layer and a liquid crystal layer interposed therebetween, and an image can be displayed using light provided from the backlight unit.
  • the present invention is directed to solving the above-mentioned problems and other problems.
  • Another object may be to improve the contrast ratio of the display device.
  • Yet another object is to efficiently drive the local dimming of the display device.
  • a display panel comprising: a display panel; A light guide plate positioned behind the display panel; A first optical assembly positioned at one side of the light guide plate; A second optical assembly positioned on the other side of the light guide plate; A first direction reflection protrusion located on a lower surface of the light guide plate and reflecting the light provided by the first light assembly toward the display panel; And a second direction reflection protrusion which is disposed on a lower surface of the light guide plate and reflects light provided by the second light assembly toward the display panel.
  • the first direction reflection protrusion has a first inclined surface inclined from the lower surface of the light guide plate toward the first optical assembly, and the second direction reflection protrusion is formed on the lower surface of the light guide plate And a second inclined surface inclined from the first optical assembly toward the second optical assembly.
  • one side of the light guide plate and the other side of the light guide plate may face each other.
  • the density of the plurality of first direction reflection protrusions increases as the distance from the one side of the light guide plate increases.
  • the density of the plurality of first direction reflection protrusions may be lowered toward the other side of the light guide plate.
  • the density of the plurality of second direction reflection protrusions increases as the distance from the other side of the light guide plate increases.
  • the density of the plurality of second direction reflection protrusions may be lowered toward the one side of the light guide plate.
  • the first direction reflection protrusion and the second direction reflection protrusion may be engraved on the lower surface of the light guide plate.
  • the first direction reflection projection includes a first rear surface that is connected to the first inclined surface and faces the second optical assembly
  • the second direction reflection projection includes: And a second rear surface coupled to the sloped surface and facing the first optical assembly.
  • At least one of the first inclined surface and the second inclined surface may have an obtuse angle with respect to a lower surface of the light guide plate.
  • At least one of the first back surface and the second back surface may have a right angle or an acute angle with respect to a lower surface of the light guide plate.
  • the light guide plate includes: a first region adjacent to one side of the light guide plate; A second region adjacent to the other side of the light guide plate; And a third region positioned between the first region and the second region, wherein the first direction reflection projection is located in the first region and the third region, and the second direction reflection projection The second region, and the third region.
  • the sum of the first and second direction reflection protrusions may be higher than the first region or the second region.
  • the density of the sum of the first direction and the second direction reflection protrusions located in the third region is greater than the density of the sum of the first region and the second region,
  • the area located between the adjacent areas may be lower.
  • the contrast ratio of the display device can be improved.
  • the local dimming of the display device can be efficiently driven.
  • FIG 1 and 2 are views showing a display device related to the present invention.
  • 3 to 9 are views showing the configuration of a display device related to the present invention.
  • FIGS. 10 to 14 are views showing examples of a light guide plate according to an embodiment of the present invention.
  • 15 to 23 are views showing examples of a light guide plate pattern according to an embodiment of the present invention.
  • 24 to 31 are diagrams showing examples of local dimming according to an embodiment of the present invention.
  • liquid crystal display device LCD
  • the display panel applicable to the present invention is not limited to the liquid crystal panel, but may be a plasma display panel, P), a field emission display (FED), and an organic light emitting diode (OLED).
  • P plasma display panel
  • FED field emission display
  • OLED organic light emitting diode
  • the display device includes a first long side (LS1), a second long side (LS2), a first long side (LS1) and a second long side (LS2) opposite to the first long side
  • LS1 first long side
  • LS2 second long side
  • LS1 first long side
  • LS2 second long side
  • first short side SS1 is referred to as a first side area
  • second short side SS2 is referred to as a second side area against the first side area
  • 1 long side area LS1 is referred to as a third side area adjacent to the first side area and the second side area and located between the first side area and the second side area
  • the second long side area LS2 may be referred to as a fourth side area adjacent to the first side area and the second side area and located between the first side area and the second side area and against the third side area .
  • first and second long sides LS1 and LS2 are longer than the lengths of the first and second short sides SS1 and SS2 according to the convenience of the description, LS2 may be substantially equal to the lengths of the first and second short sides SS1 and SS2.
  • a first direction (DR1) is a direction parallel to a long side (LS1, LS2) of the display panel 100 and a second direction (DR2) May be in a direction parallel to the short side (SS1, SS2).
  • the third direction DR3 may be a direction perpendicular to the first direction DR1 and / or the second direction DR2.
  • the first direction DR1 and the second direction DR2 may collectively be referred to as a horizontal direction.
  • the third direction DR3 may be referred to as a vertical direction.
  • the side on which the display device displays an image may be referred to as a front side or a front side.
  • a side on which an image can not be observed can be referred to as a rear side or a rear side.
  • the first long side LS1 side can be referred to as the upper side or the upper side.
  • the second long side LS2 can be referred to as the lower side or the lower side.
  • the first short side SS1 may be referred to as the left side or the seat side
  • the second short side SS2 may be referred to as the right side or the right side.
  • first long side LS1, the second long side LS2, the first short side SS1, and the second short side SS2 may be referred to as the edges of the display device.
  • a corner where the first long side LS1, the second long side LS2, the first short side SS1, and the second short side SS2 meet with each other can be referred to as a corner.
  • a point where the first long side LS1 and the first short side SS1 meet is a first corner C1
  • a point where the first long side LS1 and the second short side SS2 meet is a second corner C2
  • a point where the second short side SS2 meets the second long side LS2 is a third corner C3 and a point where the second long side LS2 and the first short side SS1 meet is a fourth corner C4.
  • the direction from the first short side SS1 to the second short side SS1 or the direction from the second short side SS2 to the first short side SS1 can be referred to as the left and right direction LR.
  • the direction from the first long side LS1 to the second long side LS2 or the direction from the second long side LS2 to the first long side LS1 may be called the up and down direction UD.
  • a display device 100 may include a display panel 110 and a back cover 150 behind the display panel 110.
  • the back cover 150 may be connected to the display panel 110 in a sliding manner in a direction from the first long side LS1 toward the second long side LS2, that is, in the second direction DR2.
  • the back cover 150 is attached to the first short side SS1 of the display panel 110, the second short side SS2 against the first short side SS1 and the first short side SS1, And can be fitted in a sliding manner from the first long side LS1 located between the first short side SS1 and the second short side SS2.
  • the back cover 150 and / or other structures adjacent thereto may include projections, sliding portions, engaging portions, and the like.
  • the display device 100 may include a front cover 105, a display panel 110, a backlight unit 120, a frame 130, and a back cover 150.
  • the front cover 105 may cover at least a part of the front surface and the side surface of the display panel 110.
  • the front cover 105 may be in the form of a rectangular frame having a hollow center. Since the center of the front cover 105 is empty, the image of the display panel 110 can be displayed externally.
  • the front cover 105 can be divided into a front cover and a side cover. That is, it can be divided into a front cover positioned on the front side of the display panel 110 and a side cover positioned on the side of the display panel 110.
  • the front cover and the side cover may be separately configured. Either the front cover or the side cover may be omitted. For example, for the purpose of aesthetic design or the like, it means that there is no front cover, but only a side cover exists.
  • the display panel 110 is provided on the front surface of the display device 100 and images can be displayed.
  • the display panel 110 divides the image into a plurality of pixels, and outputs the image by adjusting the color, brightness, and saturation of each pixel.
  • the display panel 110 may be divided into an active area in which an image is displayed and a de-active area in which an image is not displayed.
  • the display panel 110 may include a front substrate and a rear substrate facing each other with a liquid crystal layer interposed therebetween.
  • the front substrate may include a plurality of pixels consisting of red (R), green (G) and blue (B) sub-pixels.
  • the front substrate can generate an image corresponding to the color of red, green, or blue according to a control signal.
  • the back substrate may include switching elements.
  • the rear substrate can switch the pixel electrodes.
  • the pixel electrode can change the molecular arrangement of the liquid crystal layer according to a control signal applied from the outside.
  • the liquid crystal layer may include a plurality of liquid crystal molecules. The liquid crystal molecules can change the arrangement in accordance with the voltage difference generated between the pixel electrode and the common electrode.
  • the liquid crystal layer can transmit light provided from the backlight unit 120 to the front substrate.
  • the backlight unit 120 may be positioned behind the display panel 110.
  • the backlight unit 120 may include a plurality of light sources.
  • the light source of the backlight unit 120 may be arranged in a direct-type or an edge-type.
  • a diffusion plate may be further included.
  • the backlight unit 120 may be coupled to the front and side surfaces of the frame 130.
  • a plurality of light sources may be disposed within one side of the frame 130, and in such a case may be referred to as an edge type backlight unit.
  • the backlight unit 120 may be driven by a whole driving method or a partial driving method such as local dimming, impulsive, or the like.
  • the backlight unit 120 may include an optical sheet 125 and an optical layer 123.
  • the optical sheet 125 may allow light from the light source to be uniformly transmitted to the display panel 110.
  • the optical sheet 125 may be composed of a plurality of layers. For example, at least one prism sheet and / or at least one diffusion sheet.
  • the optical sheet 125 may have at least one engagement portion 125d.
  • the engaging portion 125d can be engaged with the front cover 105 and / or the back cover 150. [ That is, directly to the front cover 105 and / or the back cover 150. [ Alternatively, the engagement portion 125d may be coupled to the structure coupled to the front cover 105 and / or the back cover 150. [ That is, to the front cover 105 and / or the back cover 150.
  • the optical layer 123 may include a light source or the like. The specific structure of the optical layer 123 will be described in corresponding portions.
  • the frame 130 may serve to support the components of the display device 100.
  • a configuration such as the backlight unit 120 may be coupled to the frame 130.
  • the frame 130 may be made of a metal such as an aluminum alloy.
  • the back cover 150 may be positioned on the rear surface of the display device 100. [ The back cover 150 can protect the internal structure from the outside. At least a portion of the back cover 150 may be coupled to the frame 130 and / or the front cover 105.
  • the back cover 150 may be an injection-molded material of a resion.
  • the optical sheet 125 may be positioned in front of the frame 130.
  • FIG. The optical sheet 125 can engage with the frame 130 at the edge of the frame 130.
  • the optical sheet 125 can be directly seated on the edge of the frame 130. [ That is, the optical sheet 125 can be supported by the frame 130.
  • the edge surface of the reflective sheet 125 can be wrapped by the first guide panel 117.
  • the optical sheet 125 may be positioned between the edge of the frame 130 and the flange 117a of the first guide panel 117.
  • the display panel 110 may be positioned on the front surface of the optical sheet 125.
  • the edge of the display panel 110 may be coupled to the first guide panel 117. That is, the display panel 110 can be supported by the first guide panel 117.
  • An edge region of the front surface of the display panel 110 can be enclosed by the front cover 105.
  • the display panel 110 can be positioned between the first guide panel 117 and the front cover 105.
  • the display device may further include a first guide panel 100 and a second guide panel 113.
  • the optical sheet 125 can be coupled to the second guide panel 113. That is, it means that the second guide panel 113 is coupled to the frame 130 and the optical sheet 125 is coupled to the second guide panel 113.
  • the second guide panel 113 may be made of a different material from the frame 130.
  • the frame 130 may be configured to enclose the first and second guide panels 117 and 113.
  • the first or second guide panel 117 or 113 may be referred to as a holder or a support member.
  • the front cover 105 may not cover the front surface of the display panel 110 in the display device 100 according to an embodiment of the present invention. That is, one end of the front cover 105 can be positioned on the side of the display panel 110.
  • the optical layer 123 may include a substrate 122, a reflective sheet 126, an optical assembly 124, and a light guide plate 128.
  • the optical layer 123 may be positioned in front of the frame 130.
  • the optical layer 123 may be positioned between the frame 130 and the optical sheet 125.
  • the optical layer 123 may be supported by the frame 130.
  • the substrate 122 may be located inside the frame 130.
  • the substrate 122 may be coupled to the first guide panel 117.
  • the substrate 122 may be directly coupled to the first guide panel 117.
  • the substrate 122 may be configured to be coupled to at least one of the first guide panel 117, the frame 130, and the top case 105.
  • the substrate 124 may be positioned adjacent the side of the reflective sheet 126 and / or the light guide plate 128. That is, it means that the front surface of the substrate 124 can be directed to the optical layer 123.
  • the substrate 124 and the reflective sheet 126 and / or the light guide plate 128 may be spaced apart from each other by a predetermined distance. The specific configuration of the substrate 122 and the optical layer 123 will be described in corresponding portions.
  • the backlight unit 120 includes an optical layer 123 including a substrate 122, at least one optical assembly 124, a reflective sheet 126, and a light guide plate 128, And an optical sheet 125 positioned on the front side of the layer 123.
  • the substrate 122 may be located on at least one side of the other configuration of the optical layer 123.
  • the substrate 122 may extend in the width direction of the other configuration of the optical layer 123.
  • At least one optical assembly 124 may be mounted on the substrate 122.
  • An electrode pattern for connecting the adapter and the optical assembly 124 may be formed on the substrate 122.
  • a carbon nanotube electrode pattern may be formed on the substrate 122 to connect the optical assembly 124 and the adapter.
  • the substrate 122 may be composed of at least one of polyethylene terephthalate (PET), glass, polycarbonate (PC), and silicon.
  • the substrate 122 may be a printed circuit board (PCB) on which at least one optical assembly 124 is mounted.
  • PCB printed circuit board
  • the optical assembly 124 may be disposed on the substrate 122 with a predetermined gap therebetween.
  • the longitudinal width of the optical assembly 124 may be smaller than the thickness direction width of the light guide plate 128. Therefore, most of the light emitted from the optical assembly 124 can be transmitted to the inside of the light guide plate 128.
  • the optical assembly 124 may be a light emitting diode (LED) chip or a light emitting diode package including at least one light emitting diode chip.
  • LED light emitting diode
  • the optical assembly 124 may be comprised of a colored LED or white LED emitting at least one color from among colors such as red, blue, green, and the like.
  • the colored LED may include at least one of a red LED, a blue LED, and a green LED.
  • the light source included in the optical assembly 124 may be a COB (Chip On Board) type.
  • the COB type may be a form in which an LED chip, which is a light source, is directly coupled to the substrate 122. Thus, the process can be simplified. In addition, the resistance can be lowered, thereby reducing energy lost by heat. That is, it means that the power efficiency of the optical assembly 124 can be increased.
  • the COB type can provide a brighter light.
  • the COB type can be realized thinner and lighter than the conventional one.
  • the light guide plate 128 may be positioned in front of the optical assembly 124.
  • the light guide plate 128 may serve to spread light incident from the optical assembly 124 widely.
  • the light guide plate 128 may have a stepped shape adjacent to the optical assembly 124.
  • the lower surface of the light guide plate 128 is inclined upward and can reflect light incident from the optical assembly 124 forward.
  • the reflective sheet 126 may be positioned behind the light guide plate 128.
  • the reflective sheet 126 may reflect light emitted from the optical assembly 124 forward.
  • the reflective sheet 126 can reflect the light reflected from the light guide plate 128 forward.
  • the reflective sheet 126 may comprise at least one of a metal and a metal oxide which are reflective materials.
  • the reflective sheet 126 may include a metal and / or a metal oxide having a high reflectance such as at least one of aluminum (Al), silver (Ag), gold (Au), and titanium dioxide (TiO2) can do.
  • the reflective sheet 126 may be formed by depositing and / or coating a metal or metal oxide.
  • the reflective sheet 126 may be printed with an ink containing a metal material.
  • the reflection sheet 126 may have a vapor deposition layer formed by a vacuum vapor deposition method such as a thermal vapor deposition method, an evaporation method, or a sputtering method.
  • the reflection sheet 126 may be formed with a coating layer and / or a printing layer using a printing method, a gravure coating method, or a silk screen method.
  • a diffusion plate (not shown) may be further provided on the entire surface of the light guide plate 128.
  • the diffuser plate can diffuse the light emitted from the light guide plate 128 forward.
  • an air gap may be located between the light guide plate 128 and the optical sheet 125.
  • the air gap can serve as a buffer through which light emitted from the optical assembly 124 can spread widely.
  • the resin can be deposited on the optical assembly 124 and / or the reflective sheet 126. The resin may serve to diffuse the light emitted from the optical assembly 124.
  • the optical sheet 125 may be positioned in front of the light guide plate 128. [ The rear surface of the optical sheet 125 is in close contact with the light guide plate 128 and the front surface of the optical sheet 125 is in close contact with the rear surface of the display panel 110.
  • the optical sheet 125 may include at least one sheet.
  • the optical sheet 125 may include one or more prism sheets and / or one or more diffusion sheets.
  • the plurality of sheets included in the optical sheet 125 may be in an adhered and / or adhered state.
  • the optical sheet 125 may be composed of a plurality of sheets having different functions.
  • the optical sheet 125 may include first to third optical sheets 125a to 125c.
  • the first optical sheet 125a has the function of a diffusing sheet and the second and third optical sheets 125b and 125c can function as a prism sheet.
  • the number and / or position of the diffusion sheet and prism sheet may be varied.
  • a first optical sheet 125a which is a diffusion sheet
  • a second optical sheet 125b which is a prism sheet.
  • the diffusion sheet can prevent the light coming from the light guide plate 128 from being partially concentrated, thereby making the brightness of the light more uniform.
  • the prism sheet can condense the light coming from the diffusion sheet and allow light to enter the display panel 110 vertically.
  • the engaging portion 125d may be formed on at least one of the corners of the optical sheet 125. [ The engaging portion 125d may be formed on at least one of the first to third optical sheets 125a to 125c.
  • the engaging portion 125d may be formed at a long side edge of the optical sheet 125.
  • the engaging portion 125d formed on the side of the first long side and the engaging portion 125d formed on the side of the second long side may be asymmetric.
  • the position and / or number of the engaging portion 125d of the first long side and the engaging portion 125d of the second long side may be different from each other.
  • the substrate 122 and the optical assembly 124 may be positioned in the direction of the lower side 110c of the display panel 110.
  • FIG. An edge type backlight unit in which the optical assembly 124 is disposed on the side of the display panel 110 can be referred to as an edge type backlight unit.
  • the optical assembly 124 may emit light from the lower side 110c to the upper side 110d of the display panel 110.
  • the present invention is not limited thereto, and the optical assembly 124 may be positioned on the upper side 110d of the display panel 110.
  • the optical assembly 124 may be located on the right side 110a of the display panel 110.
  • FIG. the present invention is not limited thereto, and the optical assembly 124 may be located on the left side 110b of the display panel 110.
  • the optical assembly 124 may be positioned on the lower side 110c and the upper side 110d of the display panel 110.
  • FIG. 9 (c) the optical assembly 124 may be positioned on the right side 110a and the left side 110b of the display panel 110.
  • FIG. 9 (c) the optical assembly 124 may be positioned on the right side 110a and the left side 110b of the display panel 110.
  • the optical assembly 124 is disposed on opposite sides of the display panel 110 as a dual type backlight unit.
  • the dual type backlight unit can easily diffuse the light to the front surface of the display panel 110 even in the weaker light.
  • the optical assembly 124 may be located on a slope of the display panel 110. If the optical assembly 124 is located on a slope of the display panel 110, it is easier to diffuse the light than other backlight units.
  • the first optical assembly 224a may be positioned at one side 228S1 of the light guide plate 228 and the second optical assembly 224b may be positioned at the other side 228S2 of the light guide plate 228 have.
  • the other side 228S2 of the light guide plate 228 may face or face one side 228S1 of the light guide plate 228.
  • the light guide plate 228 may include reflection protrusions 310 and 320.
  • the reflective protrusions 310 and 320 may be positioned adjacent to the lower surface 228R of the light guide plate 228 or may be formed on the lower surface 228R of the light guide plate 228.
  • the lower surface 228R or the rear surface 228R of the light guide plate 228 may face or face the upper surface 228F or the front surface 228F of the light guide plate 228.
  • the plurality of reflecting protrusions 310 and 320 may be plural, and the plurality of reflecting protrusions 310 and 320 may form a pattern.
  • the cross-section of the reflecting protrusions 310 and 320 may be rectangular, and may be circular or elliptical.
  • the plurality of reflection protrusions 310 and 320 may include a first direction reflection protrusion 310 and a second direction reflection protrusion 320.
  • the plurality of reflecting protrusions 310 and 320 may be directional.
  • the first direction reflective protrusion 310 may reflect light provided by the first optical assembly 224a and the second direction reflective protrusion 320 may reflect light provided by the second optical assembly 224b Can be reflected.
  • the reflective sheet 226 may be positioned adjacent to the lower surface 228R of the light guide plate 228. [ The reflective sheet 226 may be configured to receive light incident on the light guide plate 228 from the first light assembly 224a and / or the second light assembly 224b toward the front of the light guide plate 228 or the display panel 110 .
  • the reflective protrusions 310 and 320 may have bottom surfaces 312 and 322, rear surfaces 316 and 326, and inclined surfaces 314 and 324.
  • the sloped surfaces 314 and 324 can be referred to as effective reflecting surfaces 314 and 324.
  • the rear surfaces 316 and 326 may be referred to as invalid reflective surfaces 316 and 326.
  • the first direction reflective protrusion 310 may have a first bottom surface 312, a first back surface 316 and a first inclined surface 314 and the second direction reflective protrusion 320 may have a second bottom surface 322 A second rear surface 326, and a second sloped surface 324.
  • the second back surface 326
  • the first direction reflection protrusion 310 may be engraved on the lower surface 228R or the rear surface 228R of the light guide plate 228.
  • the first bottom surface 312 may be an empty space.
  • the first inclined surface 314 may be inclined at an angle ata1 with respect to the lower surface 228R or the rear surface 228R of the light guide plate 228 and the light provided from the first light assembly 224a may be inclined by the light guide plate 228, Toward the front surface 228F or the top surface 228F or the display panel 110 (see Fig. 5).
  • a certain angle (theta1) may be an obtuse angle.
  • the first rear surface 316 may be tilted by a predetermined angle ata2 with respect to the lower surface 228R or the rear surface 228R of the light guide plate 228 and the light provided by the second light assembly 224b may be inclined by the light guide plate 228, To the lower surface 228R or to the back surface 228R or to the second optical assembly 224b.
  • the angle ata2 may be a right angle or an acute angle.
  • the first direction reflection protrusion 310 can reflect the light provided from the first optical assembly 224a toward the front surface 228F or the top surface 228F of the light guide plate 228, but the second optical assembly 224b may not be reflected toward the front surface 228F or the top surface 228F of the light guide plate 228.
  • the second direction reflection protrusion 320 may be engraved on the lower surface 228R or the rear surface 228R of the light guide plate 228.
  • the second bottom surface 322 may be an empty space.
  • the second inclined surface 324 may be inclined at an angle ata1 with respect to the lower surface 228R or the rear surface 228R of the light guide plate 228 and the light provided from the second light assembly 224b may be inclined by the light guide plate 228, Toward the front surface 228F or the top surface 228F or the display panel 110 (see Fig. 5).
  • a certain angle (theta1) may be an obtuse angle.
  • the second rear surface 326 may be inclined at an angle ata2 with respect to the lower surface 228R or the rear surface 228R of the light guide plate 228 and the light provided from the first light assembly 224a may be tilted by the light guide plate 228, In the direction of the lower surface 228R or the back surface 228R or the first optical assembly 224a.
  • the angle ata2 may be a right angle or an acute angle.
  • the second direction reflection protrusion 320 can reflect the light provided by the second optical assembly 224b toward the upper surface 228F or the front surface 228F of the light guide plate 228, but the first optical assembly 224a may not be reflected toward the upper surface 228F or the front surface 228F of the light guide plate 228.
  • the first direction reflection protrusion 310 may be imprinted on the lower surface 228R or the rear surface 228R of the light guide plate 228.
  • the first bottom surface 312 may be an empty space.
  • the first inclined surface 314 may be inclined at an angle ata1 with respect to the rear surface or the bottom surface of the imprinting layer IP and the light provided from the first light assembly 224a may be inclined to the front surface 228F Or the upper surface 228F or the display panel 110 (see Fig. 5).
  • a certain angle (theta1) may be an obtuse angle.
  • the first rear surface 316 may be tilted by a certain angle theta2 with respect to the imprinting layer IP and the light provided by the second optical assembly 224b may be tilted downward, 2 optical assembly 224b.
  • the angle ata2 may be a right angle or an acute angle.
  • the first direction reflection protrusion 310 can reflect the light provided from the first optical assembly 224a toward the front surface 228F or the top surface 228F of the light guide plate 228, but the second optical assembly 224b may not be reflected toward the front surface 228F or the top surface 228F of the light guide plate 228.
  • the second direction reflection protrusion 320 may be imprinted on the lower surface 228R or the rear surface 228R of the light guide plate 228. As shown in FIG. If the second direction reflective protrusion 320 is engraved, the second bottom surface 322 may be an empty space.
  • the second inclined surface 324 may be inclined at an angle ata1 with respect to the rear surface or the bottom surface of the imprinting layer IP and the light provided from the second light assembly 224b may be inclined to the front surface 228F Or the upper surface 228F or the display panel 110 (see Fig. 5).
  • a certain angle (theta1) may be an obtuse angle.
  • the second rear surface 326 may be tilted by a predetermined angle theta2 with respect to the rear or bottom surface of the imprinting layer IP and the light provided by the first optical assembly 224a may be tilted Or back or toward the first optical assembly 224a.
  • the angle ata2 may be a right angle or an acute angle.
  • the second direction reflection protrusion 320 can reflect the light provided by the second optical assembly 224b toward the upper surface 228F or the front surface 228F of the light guide plate 228, but the first optical assembly 224a may not be reflected toward the upper surface 228F or the front surface 228F of the light guide plate 228.
  • the pattern of the first direction reflection protrusions 310 and / or the pattern of the second direction reflection protrusions 320 may have a uniform distribution.
  • the pattern of the first direction reflection protrusions 310 and / or the pattern of the second direction reflection protrusions 320 may have a constant density.
  • the pattern of the first direction reflection protrusions 310 and / or the pattern of the second direction reflection protrusions 320 may have a constant distribution regardless of the change in the longitudinal direction L or the width direction W of the light guide plate 228 Density. Density may include density due to the number of protrusions and density due to size.
  • the pattern of the first direction reflection protrusions 310 and / or the pattern of the second direction reflection protrusions 320 may have a non-uniform distribution.
  • the pattern of the first direction reflection protrusions 310 and / or the pattern of the second direction reflection protrusions 320 may have varying densities.
  • the pattern of the first direction reflection protrusions 310 and / or the pattern of the second direction reflection protrusions 320 may have a linearity according to the change of the longitudinal direction L or the width direction W of the light guide plate 228 And may have non-linearity. Density may include density due to the number of protrusions and density due to size.
  • first direction reflection protrusion 310 and / or the second direction reflection protrusion 320 may be referred to as a dot.
  • the dot DT may be disposed in the dot region DA.
  • the adjacent dots DT may be spaced apart from each other by the first interval O1. That is, the interval between the dots DT can be constant.
  • the interval between the dots DT may affect the reflectance or the like. For example, if the distance between the dots DT is dense, the reflectance can be increased.
  • some of the adjacent dots DT may be spaced apart by a first interval O1, and in other cases may be spaced apart by a second interval O2. That is, the intervals between the dots DT may be different from each other.
  • the dot area DA may be divided into a plurality of areas.
  • the dot area DA may be divided into a first area P1 and a second area P2.
  • the dots DT included in the first area P1 and the second area P2 may have different attributes.
  • the number density or size of the first dot DT1 in the first area P1 may be different from the number density or size of the second dot DT2 in the second area P2.
  • the dot area DA may be divided into a plurality of areas.
  • the dot area DA may be divided into the first to third areas P1 to P3.
  • the first to third dots DT1 to DT3 included in the first to third regions P1 to P3 may have different attributes.
  • the second dot DT2 may be larger than the first dot DT1
  • the third dot DT3 may be larger than the second dot DT2.
  • the sizes of the first to third dots DT1 to DT3 are the same, but the number density in the second region P2 is different from the number density in the first region P1 and the number density in the second region P2, 3 region P3 may be different.
  • Another example means that the number density in the second region P2 is larger than the number density in the first region P1 and the number density in the third region P3 may be larger than the number density in the second region P2.
  • the dot area DA may not be clearly divided into a plurality of areas. However, at least one of the size, the number density, and the reflectance of the dot DT included in the dot area DA may be different. For example, as the direction of the X-axis increases, the size of the dots DT may gradually increase or the number of dots DT of the same size may increase.
  • the density of the dots DT may vary along the X direction.
  • the light guide plate 228 includes a first area AR1, a second area AR2, a third area AR3, a fourth area AR4, a fifth area AR5, a sixth area AR6, and / And a seventh area AR7.
  • the first to fourth regions AR1 to AR7 may be sequentially arranged from the first optical assembly 224a toward the second optical assembly 224b.
  • the density of the dots DT in the second area AR2 may be larger than the density of the dots DT in the first area AR1.
  • the density of the dots DT in the third area AR3 may be larger than the density of the dots DT in the second area AR2.
  • the density of the dots DT in the fourth area AR4 may be smaller than the density of the dots DT in the third area AR3.
  • the fourth region AR4 may be a central region of the light guide plate 228.
  • the density of the dots DT of the fifth region AR5 may be greater than the density of the dots DT of the fourth region AR4.
  • the density of the dots DT of the sixth region AR6 may be smaller than the density of the dots DT of the fifth region AR5.
  • the density of the dots DT in the seventh area AR7 may be smaller than the density of the dots DT in the sixth area AR6.
  • the first area AR1 and / or the seventh area AR7 may be the outermost area of the light guide plate 228.
  • the density of the dots DT of the light guide plate 228 may be symmetrical around the fourth area AR4.
  • the first direction reflection protrusion 310 may include a first area AR1, a second area AR2, a third area AR3, a fourth area AR4, a fifth area AR5, and / Or the sixth region AR6.
  • the second direction reflection protrusion 320 includes a seventh area AR7, a sixth area AR6, a fifth area AR5, a fourth area AR4, a third area AR3, and / Or in the second region AR2.
  • the first direction reflection protrusion 310 may include a first area AR1, a second area AR2, a third area AR3, a fourth area AR4, and / May be formed in the region AR5.
  • the second direction reflection protrusion 320 includes a seventh area AR7, a sixth area AR6, a fifth area AR5, a fourth area AR4, and / or a third area AR3. As shown in FIG.
  • the first optical assembly 224a may provide light to the light guide plate 228.
  • FIG. The dot DT that is, the first direction reflection protrusion 310 (see FIG. 10), may reflect light provided from the first optical assembly 224a to the light guide plate 228.
  • the first area AR1, the second area AR2, the third area AR3, and / or the fourth area AR4 of the light guide plate 228 may be brightened.
  • the second optical assembly 224b may provide light to the light guide plate 228.
  • FIG. The dot DT that is, the second direction reflection protrusion 320 (see FIG. 10), may reflect light provided from the second optical assembly 224b to the light guide plate 228.
  • the fourth region AR4, the fifth region AR5, the sixth region AR6, and / or the seventh region AR7 of the light guide plate 228 may be brightened.
  • the first optical assembly 224a and the second optical assembly 224b may provide light to the light guide plate 228.
  • the dot (DT) that is, the first direction reflection protrusion 310 (see FIG. 10) reflects light provided from the first light assembly 224a to the light guide plate 228, and the second direction reflection protrusion 320 May reflect light provided to the light guide plate 228 from the second optical assembly 224b.
  • the second to sixth areas AR2 to AR6 of the light guide plate 228 may be brighter, and the third area AR3 to the fifth area AR5 may be the second area AR2 and / Or the sixth region AR6.
  • the light guide plate 228 may include a first light guide plate 2281 and a second light guide plate 2282.
  • the first light guide plate 2281 may be physically isolated or optically isolated from the second light guide plate 2282.
  • the first light guide plate 2281 may be positioned between the first optical assembly 224a1 and the second optical assembly 224b1.
  • the second light guide plate 2282 may be positioned between the third optical assembly 224a2 and the fourth optical assembly 224b2.
  • the first optical assembly 224a1 and the fourth optical assembly 224b2 may provide light.
  • the dot DT formed on the first light guide plate 2281 that is, the first direction reflection protrusion 310 (see FIG. 10) may reflect the light provided by the first light assembly 224a.
  • the dot DT formed on the second light guide plate 2282 that is, the second direction reflection protrusion 320 (see FIG. 10) can reflect the light provided by the fourth light assembly 224b2.
  • the first area AR1, the second area AR2, the third area AR3, and / or the fourth area AR4 may be brighter.
  • the second LGP may be illuminated in the fourth area AR4, the fifth area AR5, the sixth area AR6, and / or the seventh area AR7.
  • the second optical assembly 224b and the third optical assembly 224a2 may provide light.
  • the dot DT formed on the second light guide plate 2282 that is, the first direction reflection protrusion 310 (see FIG. 10) may reflect light provided by the third light assembly 224a2.
  • the dot DT formed on the first light guide plate 2281 that is, the second direction reflection protrusion 320 (see FIG. 10) may reflect light provided by the second light assembly 224b.
  • the second light guide plate 2282 can illuminate the first area AR1, the second area AR2, the third area AR3, and / or the fourth area AR4.
  • the first light guide plate 2281 may illuminate the fourth region AR4, the fifth region AR5, the sixth region AR6, and / or the seventh region AR7.
  • the first optical assembly 224a and the second optical assembly 224b may provide light.
  • the dot DT formed on the first light guide plate 2281 that is, the first direction reflection protrusion 310 (see FIG. 10) may reflect the light provided by the first light assembly 224a.
  • the dot DT formed on the first light guide plate 2281 that is, the second direction reflection protrusion 320, may reflect the light provided by the second light assembly 224b.
  • the second area AR2, the third area AR3, the fourth area AR4, the fifth area AR5, and / or the sixth area AR6 are brighter Can be.
  • the first area AR1 and / or the seventh area AR7 of the first light guide plate 2281 may be made brighter than the second area AR2 through the sixth area AR6 of the first light guide plate 2281. However, It can be relatively dark.
  • the third optical assembly 224a2 and the fourth optical assembly 224b2 may provide light.
  • the dot DT formed on the second light guide plate 2282 that is, the first direction reflection protrusion 310 (see FIG. 10) may reflect light provided by the third light assembly 224a2.
  • the dot DT formed on the second light guide plate 2282 that is, the second direction reflection protrusion 320 (see FIG. 10) can reflect the light provided by the fourth light assembly 224b2.
  • the second light guide plate 2282 may be configured such that the second area AR2, the third area AR3, the fourth area AR4, the fifth area AR5, and / or the sixth area AR6 are brighter Can be.
  • the first area AR1 and / or the seventh area AR7 of the second light guide plate 2282 may be made brighter than the second area AR2 through the sixth area AR6 of the second light guide plate 2282. However, It can be relatively dark.
  • a first optical assembly 224a, a second optical assembly 224b, a third optical assembly 224a2, and a fourth optical assembly 224b2 may all provide light.
  • the dot DT formed on the first light guide plate 2281, that is, the first direction reflection protrusion 310 (see FIG. 10) can reflect the light provided by the first light assembly 224a and the second direction reflection protrusion 320, see FIG. 10) may reflect light provided by the second optical assembly 224b.
  • the dot DT formed on the second light guide plate 2282, that is, the first direction reflection protrusion 310 (see FIG. 10) can reflect light provided by the third light assembly 224a2 and the second direction reflection protrusion 320, see FIG. 10) may reflect light provided by the fourth optical assembly 224b2.
  • the second area AR2, the third area AR3, the fourth area AR4, the fifth area AR5, and / or the second area AR2 of the first light guide plate 2281 and the second light guide plate 2282 6 region AR6 can be brightened.
  • the third area AR3, the fourth area AR4, and / or the fifth area AR5 may be relatively brighter than the second area AR2 and / or the sixth area AR6.

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

Abstract

La présente invention concerne un dispositif d'affichage qui peut comprendre : un panneau d'affichage ; une plaque de guidage de lumière située à l'arrière du panneau d'affichage ; un premier ensemble optique situé sur un côté de la plaque de guidage de lumière ; un second ensemble optique situé sur l'autre côté de la plaque de guidage de lumière ; une première protubérance à réflexion de direction située sur la surface inférieure de la plaque de guidage de lumière et réfléchissant, vers le panneau d'affichage, la lumière provenant du premier ensemble optique ; et une seconde protubérance à réflexion de direction située sur la surface inférieure de la plaque de guidage de lumière et réfléchissant, vers le panneau d'affichage, la lumière provenant du second ensemble optique.
PCT/KR2018/007474 2018-01-08 2018-07-02 Dispositif d'affichage Ceased WO2019135455A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2018-0002422 2018-01-08
KR1020180002422A KR20190084545A (ko) 2018-01-08 2018-01-08 디스플레이 디바이스

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WO2019135455A1 true WO2019135455A1 (fr) 2019-07-11

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KR (1) KR20190084545A (fr)
WO (1) WO2019135455A1 (fr)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
FR3133071A1 (fr) * 2022-02-28 2023-09-01 Valeo Vision Pièce optique avec plusieurs zones de sortie en série

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KR20110133747A (ko) * 2010-06-07 2011-12-14 엘지이노텍 주식회사 도광판 구조 및 이를 이용한 백라이트 유닛
KR101144093B1 (ko) * 2011-05-27 2012-05-24 주식회사 엘에스텍 하이브리드 방식에 의한 도광판의 패턴 형성 방법
KR20140072324A (ko) * 2012-11-30 2014-06-13 엘지디스플레이 주식회사 백 라이트 유닛과 이를 포함하는 액정표시장치 및 백라이트 유닛의 제조방법
US20150168630A1 (en) * 2013-12-17 2015-06-18 Samsung Display Co. Ltd. Light guide panel, backlight unit, and liquid crystal display

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KR20080004133A (ko) * 2006-07-04 2008-01-09 삼성에스디아이 주식회사 백라이트 유니트의 도광판 및 이를 구비한 백라이트 유니트
KR20110133747A (ko) * 2010-06-07 2011-12-14 엘지이노텍 주식회사 도광판 구조 및 이를 이용한 백라이트 유닛
KR101144093B1 (ko) * 2011-05-27 2012-05-24 주식회사 엘에스텍 하이브리드 방식에 의한 도광판의 패턴 형성 방법
KR20140072324A (ko) * 2012-11-30 2014-06-13 엘지디스플레이 주식회사 백 라이트 유닛과 이를 포함하는 액정표시장치 및 백라이트 유닛의 제조방법
US20150168630A1 (en) * 2013-12-17 2015-06-18 Samsung Display Co. Ltd. Light guide panel, backlight unit, and liquid crystal display

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3133071A1 (fr) * 2022-02-28 2023-09-01 Valeo Vision Pièce optique avec plusieurs zones de sortie en série

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