KR20130000815A - Backlight unit - Google Patents

Backlight unit Download PDF

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Publication number
KR20130000815A
KR20130000815A KR1020110061570A KR20110061570A KR20130000815A KR 20130000815 A KR20130000815 A KR 20130000815A KR 1020110061570 A KR1020110061570 A KR 1020110061570A KR 20110061570 A KR20110061570 A KR 20110061570A KR 20130000815 A KR20130000815 A KR 20130000815A
Authority
KR
South Korea
Prior art keywords
film
light
pattern
light source
backlight unit
Prior art date
Application number
KR1020110061570A
Other languages
Korean (ko)
Inventor
진홍범
Original Assignee
엘지이노텍 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 엘지이노텍 주식회사 filed Critical 엘지이노텍 주식회사
Priority to KR1020110061570A priority Critical patent/KR20130000815A/en
Publication of KR20130000815A publication Critical patent/KR20130000815A/en

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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
    • G02B6/0051—Diffusing 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
    • G02B6/0058—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide
    • 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
    • G02B6/0066—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 characterised by the light source being coupled to the light guide
    • G02B6/0073—Light emitting diode [LED]
    • 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
    • G02F1/133553—Reflecting elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side

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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)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Planar Illumination Modules (AREA)

Abstract

The backlight unit according to the embodiment is adjacent to the light source module, the light source module, a pattern film having a plurality of patterns formed on the upper surface, and a transmissive film disposed on the upper surface of the pattern film, and transmits a part of the light reflected from the pattern film Include.

Description

BACKLIGHT UNIT [0001]

The present invention relates to a backlight unit.

Light Emitting Diode (LED) is a device that converts an electric signal into a light form using the characteristics of a compound semiconductor, and is used for home appliances, remote controllers, electronic displays, indicators, and various automation devices. There is a trend.

The backlight unit to which the light emitting diode is applied can be used in a display device such as a liquid crystal display device, and can be used in a lighting device in a wide variety of fields. BACKGROUND ART A backlight unit which is generally used is composed of a light source, a light guide plate for diffusing light of a light source, and an optical sheet having a function of diffusing or condensing light emitted from the light guide plate.

As a light source of the backlight unit, low voltage driving and a high efficiency light emitting diode (LED) may be applied. The light emitting diode is a two-terminal diode device including a compound semiconductor such as gallium arsenide (GaAs), gallium nitride (GaN), and indium gallium nitride (InGaN). When power is applied to the cathode terminal and the anode terminal of the light emitting diode, the light emitting diode emits visible light as light energy generated when electrons and holes combine.

The backlight unit is divided into the edge type and the direct type according to the position of the light source.

The edge type backlight unit is mainly applied to a liquid crystal display device of a comparatively small size such as a monitor of a laptop type computer and a desktop type computer, and has advantages of uniformity of light, long life, and advantageous in thinning of a liquid crystal display device .

When configuring the backlight unit to which the light emitting element is applied, it is necessary to guide the light generated in the light emitting element in a predetermined direction and to ensure uniform light emission over the display area of the backlight unit. In addition, in order to improve productivity and facilitate user convenience, thinning and weight reduction of the backlight unit are important issues.

The embodiment provides a backlight unit having light generated from the light source module of the backlight unit in the form of a surface light source using a pattern of a pattern film, and transmitting light without loss to the transmission film to improve light reliability.

The backlight unit according to the embodiment is adjacent to the light source module, the light source module, a pattern film having a plurality of patterns formed on the upper surface, and a transmissive film disposed on the upper surface of the pattern film, and transmits a part of the light reflected from the pattern film Include.

The backlight unit according to the embodiment may slim the product by omitting the light guide plate and simplify the process.

The backlight unit according to the embodiment may convert the light incident from the light source module into a surface light source using the pattern of the pattern film.

The backlight unit according to the embodiment may transmit the light without loss using the transmissive film.

1A is an exploded perspective view illustrating a backlight unit according to an embodiment;
1B is an exploded partial sectional view showing a backlight unit according to an embodiment;
1C is a perspective view illustrating a part of a backlight unit according to an embodiment;
1D is a perspective view illustrating a part of a backlight unit according to an embodiment;
2 is an exploded perspective view illustrating an image display device including a backlight unit according to an embodiment;
3 is a conceptual diagram illustrating an electronic device including a backlight unit according to an embodiment.

In the description of the embodiments, it is to be understood that each layer (film), region, pattern or structure is formed "on" or "under" a substrate, each layer The terms " on "and " under " encompass both being formed" directly "or" indirectly " In addition, the criteria for above or below each layer will be described with reference to the drawings.

The thickness and size of each layer in the drawings are exaggerated, omitted, or schematically shown for convenience and clarity of explanation. In addition, the size of each component does not necessarily reflect the actual size.

Hereinafter, embodiments will be described in detail with reference to the drawings.

1A is an exploded perspective view of a backlight unit 100 according to an embodiment of the present invention. 1B is a partially exploded perspective view illustrating a backlight unit 100 according to an embodiment, FIG. 1C is a perspective view illustrating a part of a backlight unit 100 according to an embodiment, and FIG. 1D illustrates a portion of a backlight unit according to an embodiment. It is a perspective view shown.

1A, 1B, 1C, and 1D, the backlight unit 100 according to the embodiment is adjacent to the light source module 110 and the light source module 110, and a pattern in which a plurality of patterns are formed on an upper surface thereof. The film 124, and a transmissive film 122 disposed on an upper surface of the pattern film 124 and transmitting a portion of the light reflected by the pattern film 124.

Hereinafter, for convenience of description, the pattern film 124 and the transmissive film 122 are referred to as the light guide 120, but the present invention is not limited thereto.

The backlight unit 100 is a means for providing light to the liquid crystal display (not shown), and may be located on the rear surface of the liquid crystal display (not shown). The backlight unit 100 may supply light having high luminance to a liquid crystal display (not shown) while securing an appropriate viewing angle.

The light source module 110 may include a light emitting device package 112 and a printed circuit board 116 provided with the light emitting device package 112. The light source module 110 may be disposed in a direction crossing the reflective sheet 140 so that the light emitting surface of the light emitting device package 112 provided on the printed circuit board 116 may face the pattern film 124. Can be. For example, the light source module 110 may be disposed such that the light emitting surface of the light emitting device package 112 faces one side surface of the pattern film 124 and the transmissive film 122. A surface provided with the light emitting device package 112 of the light source module 110 may face one side surface of the pattern film 124 and the transmissive film 122. For example, an upper surface on which the package 112 of the light source module 110 is mounted, and one side surface of the transmissive film 122 and the pattern film 124 may be parallel to each other. Light generated by the light source module 110 may be incident into a gap between the transmission film 122 and the pattern film 124.

The light emitting device package 112 according to the embodiment may include a light emitting device (not shown), and each of the light emitting device packages 112 may generate white light, or may generate predetermined colored light. For example, the light emitting device package 112 may include R, G, and B light emitting devices (not shown) that form light of green and blue red, respectively. The light emitting device (not shown) mounted inside the light emitting device package 112 may be a light emitting diode (LED) light emitting device, but is not limited thereto.

The light emitting device package 112 is electrically connected to a body in which a cavity is formed (not shown), first and second electrodes (not shown) and first and second electrodes (not shown) mounted in the body (not shown). An encapsulant (not shown) formed in the light emitting device (not shown) and the cavity may be included, and the encapsulant (not shown) may include a phosphor (not shown).

The light emitting device package 112 may be electrically connected to the printed circuit board 116. The light emitting device package 110 may receive light from the outside to generate light to provide light to the transmissive film 122 and the pattern film 124. The light emitting device package 112 may be provided on the printed circuit board 116 to form one column, but is not limited thereto. The light emitting device package 112 may form an array having several columns. The light emitting device package 112 may be provided to have a predetermined angle, and the shape of the light emitting device package 112 may be disposed.

The light emitting device (not shown) may be connected to a lead frame (not shown) and a wire terminal (not shown). Instead of a lead frame (not shown), a conductive pattern formed on an upper surface of the package body may be used, or a light emitting device (not shown) may be directly connected to the printed circuit board 116 using flip chip bonding, but is not limited thereto.

The printed circuit board 116 may include several light emitting device packages 112. The printed circuit board 116 may be a metal printed circuit board (MPCB) having excellent heat dissipation performance or an FR4 PCB, but is not limited thereto. The MPCB can form a stacked structure of a metal base layer / insulation layer / copper etch circuit. The insulating layer (not shown) may use an epoxy or silicone resin filled with thermally conductive particles to increase thermal conductivity. The printed circuit board 116 may include an electrode pattern (not shown), and the electrode pattern (not shown) and the light emitting device package 112 may be electrically connected to each other. Power may be supplied to the light emitting device package 112 through an electrode pattern (not shown).

The transmissive film 122 and the pattern film 124 may be adjacent to the light source module 110. The transmissive film 122 and the pattern film 124 may face one side of the light emitting surface emitting light of the light emitting device package 112. The transmission film 122 and the pattern film 120 may receive light emitted from the light source module 110.

The transmissive film 122 and the pattern film 124 may overlap. There may be a gap between the transparent film 122 and the pattern film 124. An arbitrary pattern 126 may be formed on the upper surface of the pattern film 124. The upper surface of the pattern film 124 may form an inclination angle with the lower surface.

The transmissive film 122 and the pattern film 124 may receive light generated by the light source module 110 as a gap therebetween. The transmissive film 122 may pass light. The transmissive film 122 may emit light to the upper surface. The transmissive film 122 may receive light that is diffusely reflected from the pattern film 124. The transmissive film 122 may pass a portion of the light diffused by the pattern 126 of the pattern film 124 to the upper surface and pass the reflected light to the upper surface of the pattern film 124. The pattern film 124 may form light in the form of a surface light source with an arbitrary pattern 126 formed on the upper surface.

The light guide 120 may receive light as a gap between the transmission film 122 and the pattern film 124 to emit light diffused by the pattern film 124 through the transmission film 122. The light guide 120 may reflect light due to a difference in refractive index between air and films in a gap between the transmissive film 122 and the pattern film 124. The light guide 120 may convert the light incident from the light source module 110 into a surface light source through reflection.

The transmissive film 122 may be provided in pairs with the pattern film 124. The transmissive film 122 may transmit the surface light source made from the pattern film 124 without loss. The transmissive film 122 may be formed of a transparent material. The transmissive film 122 may have any shape. The transmissive film 122 may evenly distribute the surface light source.

The transmissive film 122 may reflect light generated from the light source module 110. The transmissive film 122 may reflect a portion of light and transmit a portion thereof. The transmissive film 122 may reflect a portion of the light to be sent to the pattern film 124 facing the lower surface of the transmissive film 122.

The transmissive film 122 may have any pattern. The transmissive film 122 may have a pattern formed in an intaglio or an embossed form, or an arbitrary pattern may be provided with ink, but is not limited thereto. The transmissive film 122 may have an arbitrary pattern so that light is uniformly emitted from the entire area of the transmissive film 122. The transmissive film 122 can make the surface light source uniform.

The pattern film 124 may be provided in pair with the transmission film 122. The pattern film 124 may form a gap between the transmission film 122. The pattern film 124 may have an arbitrary pattern 126. The pattern film 124 may include a pattern 126 in the form of dots or lines on the top surface, but is not limited thereto. The pattern film 124 may form a groove to reflect light incident from the light source module 110, but is not limited thereto. The pattern film 124 may form the pattern 126 itself, or may be formed by applying another material, but is not limited thereto.

The pattern film 124 may have a dot pattern 126 on the top surface. The pattern film 124 has a dot pattern of acrylic resin, styrene resin, silicone resin, synthetic silica, glass beads, aluminum oxide (Al203), silicon oxide (SiO2), titanium oxide (TiO2), zinc oxide (ZnO), To be formed from one or more of barium sulfate (BaSO 4), calcium carbonate (CaCO 3), magnesium carbonate (MgCO 3), aluminum hydroxide (Al (OH) 3), barium carbonate (BaCO 3), barium titanate (BaTiO 3), and clay But it is not limited thereto. The pattern film 124 may be printed in a silkscreen manner using a scattering ink on the pattern 126 of the dot form, but is not limited thereto.

The pattern film 124 may have an inclination angle. The upper surface of the pattern film 124 facing the transmissive film 122 may form an inclination angle with the lower surface. The pattern film 124 may form a plurality of patterns on an upper surface having an inclination angle to direct light generated from the light source module 110 to the transmissive film 122. The pattern film 124 may be thicker as it moves away from the light source module 110.

The pattern film 124 may reflect light generated from the light source module 110. The pattern film 124 may include a pattern 126 on an upper surface facing the transmissive film 122. The pattern film 124 may be a surface light source by reflecting the light generated from the light source module 110 by the pattern 126. The pattern film 124 diffusely reflects the light incident from the light source module 110 and the light reflected from the transmissive film 122 using the pattern 126 to uniformly disperse the light. In the pattern film 124, the pattern 126 provided on the upper surface may reflect light toward the transmissive film 122.

The pattern film 124 may form an inclination angle to uniformly reflect the light generated by the light source module 110. The pattern film 124 may be thicker as the upper surface thereof has an inclination angle and moves away from the light source module 110.

Referring to FIG. 1C, the pattern film 124 according to the embodiment may have a larger size of a dot pattern as the luminous flux of light generated by the light source module 110 decreases.

Referring to FIG. 1D, the pattern film 124 according to the embodiment may be closer as the plurality of patterns 126 provided on the upper surface of the pattern film 124 moves away from the light source module 110. The pattern film 124 may be denser as the light beam of light generated by the light source module 110 decreases.

According to an embodiment, the closer to the light source module 110, the pattern film 124 reduces the amount of light reflected by reducing the number of patterns 126, and the greater the pattern 126 as it moves away from the light source module 110. The amount of light emitted to the upper surface of the pattern film 124 may be increased to increase.

The pattern film 124 may densely arrange the plurality of patterns 126 formed on the upper surface to reflect more light toward the transmissive film 122. The pattern film 124 may reflect more light toward the bottom surface of the transmissive film 122 as the size of the upper pattern 126 increases. The pattern film 124 may uniformly emit light to the light transmitting film 122 by adjusting the size and density of the pattern 126 on the upper surface.

The optical sheets 140, 150, and 160 may be disposed on the transparent film 122. The optical sheets 140, 150, and 160 may evenly diffuse the light emitted from the upper surface of the transparent film 122. The optical sheets 140, 150, and 160 may be diffused film 140 containing diffused particles such as beads to diffuse light from the upper portion of the transmissive film 122, and to collect light from the upper portion of the diffused film 140. The prism film 150 having a prism pattern formed on an upper surface thereof, and a protective film 160 stacked thereon to protect the prism film 150, and the prism film 150 may contribute to the improvement of brightness of light. . The optical sheets 140, 150, and 160 may diffuse and condense the light emitted from the light source module 110 and guided by the transmission film 122 and the pattern film 124 to secure luminance and viewing angles.

The diffusion film 140 may scatter and condense the light from the light source module 110 and the feedback light from the prism film 150 to make the luminance uniform. The diffusion film 140 may improve the viewing angle. The diffusion film 140 may prevent the patterns 126 of the pattern film 124 from being seen from the outside.

The diffusion film 140 may have a thin sheet shape and may be formed of a transparent resin. For example, the diffusion film 140 may be formed by coating a light scattering resin and a light collecting resin on a film made of polycarbonate or polyester.

The prism film 150 forms a prism pattern vertically or horizontally on the surface of the optical film and condenses the light output from the diffusion film 140.

The prism pattern of the prism film 150 may be formed to have a triangular cross section in order to increase the light collecting efficiency, and the best luminance may be obtained when using a right angle prism having a 90 ° vertex angle.

The protective film 160 may be stacked on top of the prism film 150 to protect the prism film 150.

Reflective sheet 130 is formed on the lower (back) of the backlight unit 100, and reflects the light generated from the light source module 110 to the front of the backlight unit 100 to increase the light transmission efficiency.

2 is an exploded perspective view of the liquid crystal display 200 including the backlight unit 270 according to an embodiment of the present invention. The foregoing description is not explained in further detail.

FIG. 2 is an edge-lit liquid crystal display device 200, and may include a liquid crystal display panel 210 and a backlight unit 270 for providing light to the liquid crystal display panel 210.

The liquid crystal display panel 210 may display an image using light provided from the backlight unit 270. The liquid crystal display panel 210 may include a color filter substrate 212 and a thin film transistor substrate 314 facing each other with the liquid crystal interposed therebetween.

The color filter substrate 212 may implement a color of an image displayed through the liquid crystal display panel 210.

The thin film transistor substrate 214 is electrically connected to the printed circuit board 218 on which a plurality of circuit components are mounted through the driving film 217. The thin film transistor substrate 214 may apply the driving voltage provided from the printed circuit board 218 to the liquid crystal in response to the driving signal provided from the printed circuit board 218.

The thin film transistor substrate 214 may include a thin film transistor and a pixel electrode formed of a thin film on another substrate of a transparent material such as glass or plastic.

The backlight unit 270 converts the light provided from the light source module 220 and the light source module 220 into a surface light source to provide the liquid crystal display panel 210 with the transmissive film 232 and the pattern film ( 234, the optical sheets 250, 260, 264 and the pattern film 234 that are uniformly distributed in the luminance distribution of the light provided from the transmissive film 232 and the pattern film 234 and are emitted to the rear surface of the pattern film 234. The reflective sheet 240 reflects light toward the pattern film 234. The light source module 220 may include a printed circuit board 222 such that a plurality of light emitting device packages 224 and a plurality of light emitting device packages 224 may be mounted to form a module.

The backlight unit 270 according to the embodiment may include a transmissive film 232 and a pattern film 234. The transmissive film 232 and the pattern film 234 may make the light incident from the light source module 220 a surface light source.

The pattern film 234 may diffusely reflect the light incident from the light source module 220 in a pattern. The transmissive film 232 may emit part of the light reflected from the pattern film 234 to the upper surface, and the rest may be returned to the pattern film 234. The transmission film 232 and the pattern film 234 may be a surface light source of light incident from the light source module 220.

The backlight unit 270 according to the embodiment may be slimmed by using the transmissive film 232 and the pattern film 234, and may ensure light reliability.

3 is a cross-sectional view illustrating an electronic device including a backlight unit (not shown) according to an embodiment of the present invention.

Referring to FIG. 3, an example of an electronic device including a backlight unit (not shown) according to another embodiment is illustrated as a mobile communication terminal 300, but is not limited to this embodiment.

The mobile communication terminal 300 according to the embodiment includes a receiver 380 for outputting a voice signal of a call counterpart, a screen 360 that can be used as a display device, and an operation switch 370 for ending a call and a call. And a camera 310 for taking a video call or a picture. In addition, the screen 360 may include a touch panel to be used as an input device as well as a display device.

A liquid crystal display (not shown) may be provided inside the screen 360, and the liquid crystal display (not shown) may include a backlight unit (not shown).

The backlight unit according to the embodiment may include a transmissive film (not shown) and a pattern film (not shown). The transmission film (not shown) and the pattern film (not shown) may make the light incident from the light source module (not shown) a surface light source.

The pattern film (not shown) may diffusely reflect light incident from the light source module (not shown) into the pattern (not shown). The transmission film (not shown) may emit part of the light reflected from the pattern film (not shown) to the upper surface, and the rest may be returned to the pattern film (not shown). The transmissive film (not shown) and the pattern film (not shown) may make the surface light source of the light incident from the light source module (not shown).

The backlight unit (not shown) according to the embodiment may be slimmed by using a transmissive film (not shown) and a pattern film (not shown), and may ensure light reliability.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It should be understood that various modifications may be made by those skilled in the art without departing from the spirit and scope of the present invention.

100: backlight unit 110: light source module
120: light guide 122: transmissive film
124: pattern film 130: reflective sheet
140: diffusion film 150: prism film
160: protective film

Claims (11)

A light source module;
A pattern film adjacent to the light source module and having a plurality of patterns formed on an upper surface thereof; And
The backlight unit is disposed on an upper surface of the pattern film, and includes a transmissive film that transmits a part of the light reflected from the pattern film. The method of claim 1,
The pattern film has a back surface unit to form an inclination angle. The method of claim 1,
The pattern film is a backlight unit that is thicker the further away from the light source module. The method of claim 1,
The pattern provided on the pattern film is a backlight unit. 5. The method of claim 4,
The pattern increases in the distance away from the light source module. The method of claim 1,
The backlight unit is spaced apart from the transmissive film and the pattern film. The method according to claim 6,
The pattern film is a backlight unit that the distance to the transmissive film is reduced away from the light source module. The method of claim 1,
And a plurality of patterns formed on the pattern film, the distances of which are reduced from each other as the distance from the light source module decreases. The method of claim 1,
The backlight unit further comprises a reflective sheet disposed on the lower surface of the pattern film. The method of claim 1,
The backlight unit further comprises an optical sheet disposed on the upper surface of the transmissive film. The method of claim 1,
The transmissive film is a backlight unit having a plurality of patterns.
KR1020110061570A 2011-06-24 2011-06-24 Backlight unit KR20130000815A (en)

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KR1020110061570A KR20130000815A (en) 2011-06-24 2011-06-24 Backlight unit

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Application Number Priority Date Filing Date Title
KR1020110061570A KR20130000815A (en) 2011-06-24 2011-06-24 Backlight unit

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KR20130000815A true KR20130000815A (en) 2013-01-03

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KR1020110061570A KR20130000815A (en) 2011-06-24 2011-06-24 Backlight unit

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD895608S1 (en) * 2019-05-31 2020-09-08 Apple Inc. Electronic device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD895608S1 (en) * 2019-05-31 2020-09-08 Apple Inc. Electronic device

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