KR101644856B1 - Polarized back light unit and display device including the same - Google Patents

Polarized back light unit and display device including the same Download PDF

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Publication number
KR101644856B1
KR101644856B1 KR1020150080974A KR20150080974A KR101644856B1 KR 101644856 B1 KR101644856 B1 KR 101644856B1 KR 1020150080974 A KR1020150080974 A KR 1020150080974A KR 20150080974 A KR20150080974 A KR 20150080974A KR 101644856 B1 KR101644856 B1 KR 101644856B1
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KR
South Korea
Prior art keywords
light
unit
polarized
light guide
present
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KR1020150080974A
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Korean (ko)
Inventor
이재갑
소회섭
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국민대학교산학협력단
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Priority to KR1020150080974A priority Critical patent/KR101644856B1/en
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Publication of KR101644856B1 publication Critical patent/KR101644856B1/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/13362—Illuminating devices providing polarized light, e.g. by converting a polarisation component into another one
    • 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
    • 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
    • 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

Abstract

A polarizing backlight unit, and a polarizing backlight unit.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polarizing backlight unit and a display device including the polarizing backlight unit.

The present invention relates to a polarizing backlight unit and a display device including the polarizing backlight unit.

2. Description of the Related Art [0002] Recently, various portable electronic devices such as a mobile phone, a PDA, and a notebook computer have been developed, and a demand for a light and thin flat panel display device . As such flat panel displays, liquid crystal displays (LCDs), plasma display panels (PDPs), field emission displays (FEDs) and vacuum fluorescent displays (VFDs) have been actively studied. Liquid crystal display devices (LCDs) are in the spotlight at present due to reasons such as realization of high image quality and realization of a large area screen.

The liquid crystal display displays an image using a liquid crystal interposed between two electrodes. However, the liquid crystal constituting the display element of such a liquid crystal display device does not emit light by itself, but merely performs a function of transmitting or blocking light according to an applied electric signal. Therefore, in order to display information on the liquid crystal panel, a so-called backlight unit (hereinafter also referred to as BLU), which is a surface emitting device for illuminating the liquid crystal panel from behind, must be separately included in the liquid crystal display. It is preferable that such a BLU should increase the brightness of light and uniformly illuminate the liquid crystal panel by forming a uniform planar light source, which is very important from the viewpoint of the quality of the product.

In general, various components, such as a light source, a light guiding plate, a reflection sheet, a diffusion sheet, a prism sheet, and a protective sheet, And a single BLU is formed. Here, the light guide plate serves to guide light evenly from the light source to all directions. The reflective sheet reflects the light coming out from the lower surface of the light guide plate back to the light guide plate, and the diffusion sheet diffuses the light, And the prism sheet functions to improve the brightness by refracting light by vertically and horizontally. In addition, the protective sheet protects foreign matter such as dust from being adhered to grooves between the mountains and the mountains of the prism sheet and prevents scratches from occurring.

However, in the conventional BLU, a method of scattering, refracting, or diffusing light is used in order to equalize brightness.

In this regard, Korean Patent Registration No. 1219591 relates to a backlight light guide plate. Even if light is incident on a backlight system from a light source, the light is lost due to scattering, refraction, or diffusion of light.

The present application is intended to provide a polarizing backlight unit and a display device including the polarizing backlight unit.

However, the problems to be solved by the present invention are not limited to the above-mentioned problems, and other problems not mentioned can be clearly understood by those skilled in the art from the following description.

According to a first aspect of the present invention, there is provided a light guide plate including a light guide portion including a light guide portion that totally reflects light emitted from a light source, and a light extracting portion that is integrated on the light guide portion; A polarization unit formed between the light guide unit and the light extracting unit; And a reflecting film including a half wave plate formed on one side surface of the light guide unit so as to face the light source, wherein the polarizing unit separates the polarized light component of the light, and the effective polarized light is reflected by the light extracting unit And the invalid polarized light totally reflected by the polarizing section is converted into effective polarized light by the half-wave plate. The polarized-light backlight unit according to claim 1, do.

A second aspect of the invention provides a display device comprising a polarizing backlight unit according to the first aspect of the present application.

According to one embodiment of the present invention, not only effective polarized light but also invalid polarized light can be converted into effective polarized light by separating the polarized light component of the light by the polarized light portion. Accordingly, the light which can not be used in the past can be reproduced and used, and the luminance can be improved by about two times or more. Accordingly, a display device with maximized optical efficiency can be manufactured.

In addition, the power consumption of the backlight of the same brightness can be reduced by half.

In addition, by eliminating a separate physical space for reproducing light, the size and thickness of the display device can be reduced.

1 is a schematic diagram of a polarization backlight unit according to an embodiment of the present invention.
2 is a schematic diagram of a polarization backlight unit according to an embodiment of the present invention.
3 is a schematic diagram of a polarization backlight unit according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. It should be understood, however, that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, the same reference numbers are used throughout the specification to refer to the same or like parts.

Throughout this specification, when a part is referred to as being "connected" to another part, it is not limited to a case where it is "directly connected" but also includes the case where it is "electrically connected" do.

Throughout this specification, when a member is " on " another member, it includes not only when the member is in contact with the other member, but also when there is another member between the two members.

Throughout this specification, when an element is referred to as " including " an element, it is understood that the element may include other elements as well, without departing from the other elements unless specifically stated otherwise. The terms " about ", " substantially ", etc. used to the extent that they are used throughout the specification are intended to be taken to mean the approximation of the manufacturing and material tolerances inherent in the stated sense, Accurate or absolute numbers are used to help prevent unauthorized exploitation by unauthorized intruders of the referenced disclosure. The word " step (or step) " or " step " used to the extent that it is used throughout the specification does not mean " step for.

Throughout this specification, the term " combination (s) thereof " included in the expression of the machine form means a mixture or combination of one or more elements selected from the group consisting of the constituents described in the expression of the form of a marker, Quot; means at least one selected from the group consisting of the above-mentioned elements.

Throughout this specification, the description of "A and / or B" means "A or B, or A and B".

In the present specification as a whole, " light guide plate " is a part that performs the brightness and uniform lighting function of the backlight unit, and specifically, a part of the backlight unit, which is assembled inside a backlight unit for guiding light to the liquid crystal in a liquid crystal display Means an object to be injected, and may confine the light emitted from the light source to uniformly transmit the light, but the present invention is not limited thereto.

Throughout this specification, the term "light extractor" refers to "nano-sized fine pattern or micro-sized fine pattern". The micropattern includes a fine pattern such as a truncated cone shape, a polygonal prism shape, a pyramid shape, a prism shape, or a lenticular shape, and the nano-sized fine pattern includes a size of about 1 nm to about 999 nm, Sized fine pattern comprises a size of from about 1 [mu] m to about 1,000 [mu] m.

Throughout the present specification, " lenticular " means that a columnar shape is arranged side by side in a plurality of rows. Since a stereoscopic effect or a transformation can be realized according to a viewing angle, , And a sheet, but the present invention is not limited thereto.

Hereinafter, embodiments and examples of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to these embodiments and examples and drawings.

According to a first aspect of the present invention, there is provided a light guide plate including a light guide portion including a light guide portion that totally reflects light emitted from a light source, and a light extracting portion that is integrated on the light guide portion; A polarization unit formed between the light guide unit and the light extracting unit; And a reflection film including a half wave plate formed on one side surface of the light guide unit so as to face the light source, wherein the polarizer unit separates the polarization component of the light by the polarization unit, And the invalid polarized light is totally reflected by the polarizing section into the light guide section, and the invalid polarized light totally reflected by the polarizing section is converted into effective polarized light by the half-wave plate. A polarizing backlight unit is provided.

In this regard, Figures 1 and 2 are schematic diagrams of a polarization backlight unit according to one embodiment of the present application. The polarizing backlight unit according to an embodiment of the present invention includes a light guide plate including a light guide unit 100 for totally reflecting light and a light extractor 200; A polarization unit 300 formed between the light guiding unit 100 and the light extracting unit 200; And a reflection film 400 including a half wave plate 410 formed on one side of the light guide unit 100 and facing the light source 500.

In one embodiment of the present invention, the light source 500 may be disposed on one side of the light guide unit 100. As the light source 500, a point light source such as a light emitting diode (LED) may be used. In addition, a plurality of point light sources may be used, or means for converting the point light source into linear fluorescent light together with the point light source may be used together, but the present invention is not limited thereto.

In one embodiment of the present invention, the light guide plate may have a shape in which the light extracting unit 200 is integrated with the light guiding unit 100, but the present invention is not limited thereto.

In one embodiment of the present invention, the light extracting unit 200 may be integrated with the light guiding unit 100 by a transparent adhesive, heat fusion, or chemical fusion, but the present invention is not limited thereto.

In one embodiment of the present invention, the transparent adhesive may be selected from the group consisting of a pressure sensitive adhesive, an optical transparent adhesive, a UV tape, an acrylic ultraviolet curing base, and combinations thereof, but is not limited thereto .

In one embodiment of the present invention, the light guiding unit 100 confines the light incident from the light source 500 and outputs a necessary amount of light through the light extracting unit 200 arranged at the calculated density and size , But may not be limited thereto.

In one embodiment of the present invention, the light incident into the light guide unit 100 in the light source 500 disposed on one side of the light guide unit 100 is totally reflected from both the upper and lower surfaces of the light guide unit 100 The light emitted from the light extracting unit 200 may travel to the inside of the light guiding unit 100 without any loss and may be emitted to the outside of the light guiding plate 200 without reflection. Accordingly, the intensity of light emitted to the outside of the backlight unit is determined according to the size and density of the light extractor 200. By designing the size and density of the light extracting unit 200, it is possible to manufacture a light guide plate having uniform luminance and high light efficiency, and the light traveling inside the light guide plate minimizes random diffuse reflection, .

In one embodiment of the present invention, the light guiding unit 100 guides light incident from the light source 500, and is formed of a plastic material such as acryl, which is one of the transmissive materials capable of transmitting light But may not be limited thereto. For example, the light guiding portion 100 may be formed of a material selected from the group consisting of polymethylmethacrylate (PMMA) series, polycarbonate (PC), polyacrylate (PA), polyurethane, But are not limited to, those selected from the group consisting of combinations of < RTI ID = 0.0 > For example, when the PMMA series having excellent weatherability and colorability is used as the light guiding portion 100, it is not easily broken or deformed due to its high mechanical strength, is lightweight, has high chemical resistance, and has low transparency to light in the visible light region And gloss can be excellent.

The light extracting unit 200 may include a fine pattern 220 formed on the substrate 210 and the light extracting unit 200 may be configured to refract and / So that the luminance of the light can be increased.

In an embodiment of the present invention, the base 210 of the light extracting unit 200 may be made of a transparent material capable of transmitting light. For example, the substrate 210 may be formed of a material selected from the group consisting of a polycarbonate series, a polysulfone series, a polyacrylate series, a polystyrene series, a polyvinylchloride series, a polyvinyl alcohol selected from the group consisting of polyvinyl alcohol series, polynorbornene series, polyester series, polyurethane, polyethyleneterephtalate, polyethylenenaphthalate, and combinations thereof. But may not be limited thereto.

In one embodiment of the present application, the substrate 210 may be a substrate 210 of a common thickness used in the light extractor 200 of the backlight unit, and the substrate 210 may have a thickness of about 10 To about 2,000 < RTI ID = 0.0 > um, < / RTI > The substrate 210 may have a thickness of from about 10 microns to about 2,000 microns, from about 10 microns to about 1,800 microns, from about 10 microns to about 1,600 microns, from about 10 microns to about 1,400 microns, from about 10 microns to about 1,200 microns From about 10 탆 to about 100 탆, from about 10 탆 to about 100 탆, from about 10 탆 to about 800 탆, from about 10 탆 to about 600 탆, from about 10 탆 to about 400 탆, May have a thickness of from about 10 [mu] m to about 50 [mu] m, but may not be limited thereto. The substrate 210 is excellent in mechanical strength and thermal stability in the thickness range, can have appropriate flexibility, and has low loss of transmitted light. That is, mechanical strength may be weak at thicknesses less than about 10 micrometers, and mechanical and optical problems at the time of realization of display devices at thicknesses greater than about 2,000 micrometers.

In one embodiment of the present invention, the fine pattern 220 included in the light extracting unit 200 includes a plurality of truncated cones, a polygonal prism, a pyramid, a prism, a lenticular, and combinations thereof A shape selected from the group consisting of a plurality of regions, and a reverse phase thereof.

In one embodiment of the present invention, the brightness and / or the viewing angle distribution of light output to the outside of the backlight unit may be determined depending on the size or density of the light extracting unit 200, but the present invention is not limited thereto.

In an embodiment of the present invention, the light extracting unit 200 may have a predetermined width or pitch, but the present invention is not limited thereto.

In one embodiment of the present invention, the light extracting unit 200 may be one in which the fine patterns 220 are arranged one-dimensionally on one side of the substrate 210, but the present invention is not limited thereto. In one embodiment of the present invention, the spacing between the fine patterns 220 formed on one side of the substrate 210 may be about 5 μm to about 500 μm, but is not limited thereto. For example, the spacing between the fine patterns 220 may range from about 5 占 퐉 to about 500 占 퐉, from about 5 占 퐉 to about 400 占 퐉, from about 5 占 퐉 to about 300 占 퐉, from about 5 占 퐉 to about 200 占 퐉, About 100 microns, about 100 microns to about 500 microns, about 200 microns to about 500 microns, about 300 microns to about 500 microns, or about 400 microns to about 500 microns. For example, if the spacing between the fine patterns 220 is less than about 5 占 퐉, total reflection may be difficult, and if the spacing between the fine patterns 220 is greater than about 500 占 퐉, light focusing may be difficult. In one embodiment of the invention, the width of the fine pattern 220 may be between about 5 microns and about 500 microns, and the height of the fine pattern 220 may be between about 5 microns and about 500 microns But may not be limited thereto.

In one embodiment of the present invention, when the light incident from the light source 500 and totally reflected in the light guide unit 100 is emitted to the outside of the backlight unit through the light extractor 200, May be separated into two polarization components orthogonal to each other by the polarization unit 300 formed between the light guide unit 100 and the light extractor 200, but the present invention is not limited thereto. The two polarized light components may be effective polarized light and reactive polarized light, and the effective polarized light is transmitted through the polarized light portion 300 and emitted to the outside of the light guide plate by the light extracting portion 200, And may be totally reflected by the polarization unit 300 into the light guide unit 100, but the present invention is not limited thereto.

In one embodiment of the present invention, the light incident from the light source 500 into the light guide unit 100 may be separated into the effective polarized light and the reactive polarized light by the polarizer 300, have. In one embodiment of the present invention, the effective polarized light may be polarized in a transverse magnetic mode. The effective polarized light means light indicated by a solid line in Figs. In one embodiment of the present invention, the invalid polarized light may be polarized in a TE mode (transverse electric mode). The invalid polarized light means light indicated as a dotted line in Figs.

In one embodiment of the invention, the polarizer 300 may comprise a nanowire grid. For example, the polarization unit 300 may include, but is not limited to, a silver nanowire grid.

1, the polarizing unit 300 may be formed on the light guiding unit 100 or may be formed on the light guiding unit 100 and the light guiding unit 100 as shown in FIG. May be formed on the mounting surface of the light extracting unit 200, but the present invention is not limited thereto.

3, the reactive polarized light totally reflected by the polarization unit 300 into the light guiding unit 100 is not scattered, refracted, or diffused, and is reflected by the light guiding unit 100. In this embodiment, Is reflected by the reflective film 400 formed on the one side of the light guide unit 100 so as to face the light source 500 and is reflected by the half wave plate 410 The polarization direction is switched. Accordingly, the invalid polarized light may be switched to the effective polarized light. Specifically, the half-wave plate 410 may output the invalid polarized light by changing the half-wave length, and thus the invalid polarized light may be converted into effective polarized light.

The converted effective polarized light may be totally reflected in the light guide unit 100 and then emitted to the outside of the backlight unit by the light extractor 200. Accordingly, by converting the invalid polarized light absorbed by the polarized light portion into the effective polarized light in the conventional polarized backlight, it is possible to provide a backlight with improved light efficiency such as luminance and power consumption.

A second aspect of the present invention provides a display device comprising a backlight unit according to the first aspect of the present application. Although a detailed description of the display device according to the second aspect of the present invention is omitted for the description of the first aspect of the present invention, the description of the first aspect of the present application is omitted in the second aspect of the present invention The same can be applied.

In one embodiment of the present invention, the display device may include an LCD display device, an LED display device, or an electronic paper, but the present invention is not limited thereto.

In one embodiment of the present invention, the display device may be manufactured by a method adopted in a general display process including the polarization backlight unit, but the present invention is not limited thereto.

It will be understood by those of ordinary skill in the art that the foregoing description of the embodiments is for illustrative purposes and that those skilled in the art can easily modify the invention without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

100: light-
200: light extracting unit
210: substrate
220: fine pattern
300:
400: reflective film
410: Half wave plate
500: light source

Claims (9)

A light guide plate including a light guide portion for totally reflecting the light emitted from the light source and a light extracting portion integrated on the light guide portion;
A polarization unit formed between the light guide unit and the light extracting unit; And
And a reflecting film including a half-wave plate formed on one side surface of the light guide unit so as to face the light source
/ RTI >
And the polarized light component of the light is separated by the polarizing section so that the effective polarized light is output to the outside of the light guide plate by the light extracting section and the reactive polarized light is totally reflected by the polarizing section into the light guide section,
Wherein the ineffective polarized light totally reflected by the polarizing unit is converted to effective polarized light by changing the polarized direction of the invalid polarized light by outputting the invalid polarized light by changing the half-
Polarized backlight unit.
The method according to claim 1,
Wherein the effective polarized light is polarized in a transverse magnetic mode.
The method according to claim 1,
And the reactive polarized light is polarized in a TE mode (transverse electric mode).
The method according to claim 1,
Wherein the polarizing portion comprises a nanowire grid.
The method according to claim 1,
Wherein the light extracting portion includes a shape selected from the group consisting of a plurality of truncated cone shapes, a polygonal prism shape, a pyramid shape, a prism shape, a lenticular shape, and combinations thereof, and a reverse phase thereof.
The method according to claim 1,
Wherein the light extracting portion has a constant width or pitch.

The method according to claim 1,
Wherein the light extracting unit is integrated with the light guiding unit by a transparent adhesive, heat welding, or chemical welding.
8. The method of claim 7,
Wherein the transparent adhesive includes one selected from the group consisting of a pressure sensitive adhesive, an optical transparent adhesive, a UV tape, an acrylic ultraviolet curing base, and combinations thereof.
A display device comprising a polarizing backlight unit according to any one of claims 1 to 8.
KR1020150080974A 2015-06-09 2015-06-09 Polarized back light unit and display device including the same KR101644856B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018070551A1 (en) * 2016-10-10 2018-04-19 국민대학교산학협력단 Back-light unit comprising single optical sheet that has light extraction parts formed thereon, and back-light unit for mobile phone comprising linear light source that has light extraction parts formed therein
KR20190123497A (en) * 2018-04-24 2019-11-01 국민대학교산학협력단 Light Guide Plate And Backlight Unit Including The Same

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19980065367A (en) * 1996-06-02 1998-10-15 오평희 Backlight for LCD
JP2010091621A (en) * 2008-10-03 2010-04-22 Asahi Kasei E-Materials Corp Absorptive wire-grid polarizer
KR20130126546A (en) * 2012-05-10 2013-11-20 주식회사 엘지화학 Optical films laminate and backlight unit having enhanced optical performance

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19980065367A (en) * 1996-06-02 1998-10-15 오평희 Backlight for LCD
JP2010091621A (en) * 2008-10-03 2010-04-22 Asahi Kasei E-Materials Corp Absorptive wire-grid polarizer
KR20130126546A (en) * 2012-05-10 2013-11-20 주식회사 엘지화학 Optical films laminate and backlight unit having enhanced optical performance

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018070551A1 (en) * 2016-10-10 2018-04-19 국민대학교산학협력단 Back-light unit comprising single optical sheet that has light extraction parts formed thereon, and back-light unit for mobile phone comprising linear light source that has light extraction parts formed therein
KR20190123497A (en) * 2018-04-24 2019-11-01 국민대학교산학협력단 Light Guide Plate And Backlight Unit Including The Same
KR102165229B1 (en) * 2018-04-24 2020-10-13 국민대학교산학협력단 Light Guide Plate And Backlight Unit Including The Same

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