KR20100108962A - Light guide plate for backlight unit - Google Patents

Light guide plate for backlight unit Download PDF

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Publication number
KR20100108962A
KR20100108962A KR1020090027303A KR20090027303A KR20100108962A KR 20100108962 A KR20100108962 A KR 20100108962A KR 1020090027303 A KR1020090027303 A KR 1020090027303A KR 20090027303 A KR20090027303 A KR 20090027303A KR 20100108962 A KR20100108962 A KR 20100108962A
Authority
KR
South Korea
Prior art keywords
guide plate
light guide
light source
backlight unit
led light
Prior art date
Application number
KR1020090027303A
Other languages
Korean (ko)
Inventor
박성진
Original Assignee
박성진
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 박성진 filed Critical 박성진
Priority to KR1020090027303A priority Critical patent/KR20100108962A/en
Publication of KR20100108962A publication Critical patent/KR20100108962A/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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0016—Grooves, prisms, gratings, scattering particles or rough surfaces
    • 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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0031—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
    • G02B6/005—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
    • G02B6/0066—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
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S362/00—Illumination
    • Y10S362/80—Light emitting diode

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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)
  • Light Guides In General And Applications Therefor (AREA)
  • Planar Illumination Modules (AREA)

Abstract

The present invention relates to a light guide plate of a backlight unit used for illumination, and more particularly, by installing the LED light source 30 to the side of the light guide plate 20 coupled to the frame 10 from the LED light source 30 Illuminated by reflecting the light to the front, but the V-shaped or round-shaped grooves on the back of the light guide plate 20 to form a straight, wavy in one direction, cross direction, or irregular grooves, regular or irregular, A reflection pattern portion 22 formed by surface sanding to reflect light from the LED light source 30 forward, and the light from the LED light source 30 to the surface of the reflection pattern part forward Since the Al reflection layer 25 having Al deposited to be provided so as to be formed in duplicate, it has a characteristic of maximizing the lighting efficiency by improving the luminance by doubling the reflection efficiency of the LED light source.

Description

Light guide plate of backlight unit for illumination {LIGHT GUIDE PLATE FOR BACKLIGHT UNIT}

The present invention relates to a light guide plate of a backlight unit used for lighting, and more particularly, by forming a reflective pattern portion for reflecting the LED light source to the back surface of the light guide plate and Al reflective layer having Al deposited on the surface of the reflective pattern portion. It relates to a light guide plate of a backlight backlight unit for maximizing the brightness improvement by doubling the reflection efficiency of the LED light source by the reflection pattern portion and the Al reflection layer.

In general, a back light unit used for lighting mainly uses a light guide plate.

That is, as shown in FIGS. 1 and 2, the LED light source 3 is installed on the side of the light guide plate 2 coupled to the frame 1 to reflect the light flowing from the LED light source 3 forward. To illuminate.

In this case, since the reflective pattern part 5 is formed on the rear surface of the light guide plate to reflect the light flowing from the LED light source 3 forward, the light reflected from the LED light source 3 is reflected to improve luminance. Achieved.

Alternatively, a reflection sheet is installed on the rear surface of the light guide plate instead of the reflection pattern portion to reflect the light flowing from the LED light source 3 forward to achieve luminance improvement.

However, in the case where the reflective pattern portion is formed on the rear surface of the light guide plate, it is difficult to install the reflective sheet in close contact with the reflective pattern portion. Therefore, the reflective pattern portion or the reflective sheet may only be adopted on the rear surface of the light guide plate. As a result, the brightness improvement of the light guide plate was limited, which caused a problem that the lighting efficiency was not maximized.

The present invention has been invented to solve all the problems of the prior art, a reflective pattern for reflecting the LED light source to the back of the light guide plate of the backlight unit used for illumination and Al deposited Al on the surface of the reflective pattern portion The purpose is to maximize the luminance improvement by doubling the reflection efficiency of the LED light source by forming the reflective layer double and the reflection pattern portion and the Al reflection layer.

This invention,

By installing an LED light source to the side of the light guide plate coupled to the frame to reflect the light flowing from the LED light source to the front,

The reflective pattern portion for reflecting the light from the LED light source forwardly reflected on the back surface of the light guide plate, and the Al reflection layer on which Al is deposited to reflect the light from the LED light source to the front surface of the reflective pattern part. It is characterized by providing brightness enhancement.

The reflective pattern portion of the present invention is formed by forming a plurality of V-shaped or round-shaped uneven grooves in one direction or cross in a straight or wavy form, or by forming a plurality of irregular grooves irregularly or by sanding the surface. It has its features.

The present invention is formed by forming a plurality of V-shaped or round-shaped uneven grooves in a straight or wavy form to cross the light guide plate of the backlight unit used for illumination in one direction or cross, or to form a recessed groove. The reflective pattern portion formed by irregularly forming a large number or by the surface sanding process and the Al reflective layer on which Al is deposited on the surface of the reflective pattern portion are doubled to double the reflection efficiency of the LED light source by the reflective pattern portion and the Al reflective layer to increase luminance. The improvement is to provide the effect of maximizing the lighting efficiency.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

That is, the light guide plate of the backlight unit for illumination of the present invention, as shown in FIGS. In reflecting the light coming from the front to the front,

A reflection pattern part 22 for reflecting forward light reflected from the LED light source 30 of the light guide plate 20;

The reflective pattern portion is formed by double forming an Al reflection layer 25 deposited with Al so as to reflect the light flowing from the LED light source 30 forward.

That is, the reflective pattern portion is formed on the rear surface of the light guide plate 20 by forming an Al reflective layer 25 in which Al is deposited instead of the conventional reflective sheet which cannot be installed in close contact with the surface of the reflective pattern portion together with the reflective pattern portion 22. The light reflected from the LED light source 30 by the 22 and the Al reflection layer 25 is reflected to the front to illuminate.

In this case, the reflective pattern 22 is formed by forming a plurality of V-shaped or round-shaped uneven grooves 22a in one direction or intersecting in a straight line as shown in FIGS. 5A, B, C, D, E, F. Or a plurality of V-shaped or round-shaped concave-convex grooves 22a are formed in one direction or to cross each other, or a plurality of concave concave grooves 22b are formed in a regular or irregular manner, or are formed by the surface sanding process 22c. This is accomplished.

As the reference numeral 32, 32 represents the PCB of the LED light source (30).

Hereinafter, the operation and operation of the present invention will be described.

First, in the present invention, the reflective pattern part 22 is formed on the rear surface of the light guide plate 20 to improve luminance.

At this time, the reflective pattern part 22 is formed by forming a plurality of V-shaped or round-shaped uneven grooves 22a in a straight line to cross in one direction, or by forming a V-shaped or round-shaped uneven groove 22a in a wave shape in one direction. Or a plurality of intersecting grooves, or a plurality of concave grooves 22b are formed regularly or irregularly, or are formed by the surface sanding process 22c.

Then, the Al reflection layer 25 in which Al is further deposited on the surface of the reflective pattern part 22 is formed.

That is, according to the present invention, the reflective pattern portion 22 and the Al reflective layer 25 having a reflective function are formed in duplicate.

The light guide plate 20 of the present invention is formed by forming a plurality of light flowing from the LED light source 30 on the side of the V-shaped or round-shaped uneven grooves 22a in a straight line in one direction or intersecting, or V-shaped or rounded. Reflective pattern portion 22 formed by forming a plurality of irregular grooves 22a having a wavy shape in one direction or intersecting, or forming a plurality of concave grooves 22b regularly or irregularly, or formed by surface sanding process 22c. ) Reflects variously toward the front, and Al reflects the Al reflection layer 25 on which Al is deposited forward.

In other words, since the light flowing from the LED light source 30 is effectively reflected by the reflection pattern portion 22 and the Al reflection layer 25 on which Al is deposited, the light is effectively reflected by the reflection efficiency. It will maximize the lighting effect.

In particular, since the reflective sheet cannot be closely attached to the reflective pattern portion 22 on the rear surface of the light guide plate 20, it is difficult to install the double structure, and thus, the reflective pattern portion 22 or the reflective sheet is constituted alone. Since the Al reflection layer 25 formed by depositing Al on the surface of the reflective pattern part 22 provides a dual structure, it effectively reflects the light flowing from the LED light source 30 to the front to maximize the luminance improvement. will be.

Meanwhile, FIG. 6 shows another embodiment of the present invention. Instead of forming a reflective pattern on the rear surface of the light guide plate 20, only Al reflective layer 25 'on which Al is deposited is directly formed to the side LED light source 30 of the light guide plate. It is to improve the brightness by reflecting the light flowing from the front to the Al reflection layer (25 ') deposited Al alone.

1 is a plan view showing a backlight unit for a conventional lighting.

2 is a cross-sectional view of FIG.

Figure 3 is a cross-sectional view showing a backlight unit for illumination of the present invention.

4 is a process chart showing a manufacturing process of the light guide plate of FIG.

5a, b, c, d, e, and f are rear views illustrating various embodiments of the reflective pattern unit of the present invention.

6 is a cross-sectional view showing another embodiment of the present invention.

** Description of the symbols for the main parts of the drawings **

10: frame 20: light guide plate

30: LED light source 22: reflection pattern portion

25,25 ': Al reflective layer

Claims (7)

In the light guide plate of the backlight unit for illumination to install the LED light source 30 to the side of the light guide plate 20 coupled to the frame 10 to reflect the light flowing from the LED light source 30 to the front, A reflection pattern portion 22 for reflecting forward light reflected from the LED light source 30 to the rear surface of the light guide plate 20; The light guide plate of the backlight unit for illumination, characterized in that formed by the double reflection of the Al reflecting layer 25 is deposited to reflect the light flowing from the LED light source 30 to the front of the reflective pattern portion.  The method of claim 1, The reflective pattern part 22 is a light guide plate of the backlight unit for illumination, characterized in that formed by forming the V-shaped or round uneven groove (22a) in a straight direction in one direction.  The method of claim 1, The reflective pattern part 22 is a light guide plate of the backlight unit for illumination, characterized in that formed by forming a wavy or V-shaped grooves (22a) of the round shape. The method according to claim 2 or 3, The uneven groove of the reflective pattern part is further formed in an orthogonal direction crossing with one direction, the light guide plate of the backlight unit for illumination. The method of claim 1, The reflective pattern part 22 is a light guide plate of the backlight unit for illumination, characterized in that formed by forming the recessed grooves (22b). The method of claim 1, The reflective pattern portion 22 is a light guide plate of the backlight unit for illumination, characterized in that formed by the surface sanding processing portion (22c). In the light guide plate of the lighting backlight unit for installing the LED light source 30 to the side of the light guide plate 20 coupled to the frame 10 to reflect the light flowing from the LED light source 30 to the front, It is formed to directly reflect the Al reflecting layer 25 deposited Al on the light guide plate directly to the light flowing from the side LED light source 30 of the light guide plate to the Al reflecting layer 25 deposited Al alone forward. A light guide plate of a backlight unit for illumination.
KR1020090027303A 2009-03-31 2009-03-31 Light guide plate for backlight unit KR20100108962A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020090027303A KR20100108962A (en) 2009-03-31 2009-03-31 Light guide plate for backlight unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020090027303A KR20100108962A (en) 2009-03-31 2009-03-31 Light guide plate for backlight unit

Publications (1)

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KR20100108962A true KR20100108962A (en) 2010-10-08

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102840511A (en) * 2012-08-06 2012-12-26 京东方科技集团股份有限公司 Backlight module and display device
KR101278440B1 (en) * 2012-01-30 2013-07-01 주식회사 에스폴리텍 Light guide panel that v-groove formed on
US20170003437A1 (en) * 2015-03-03 2017-01-05 Boe Technology Group Co., Ltd. Composite light guide plate and manufacturing method thereof, backlight module, and display device
KR20200077330A (en) * 2018-12-20 2020-06-30 주식회사 엘지화학 Light guide plate having air permability and air purifying filter including the same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101278440B1 (en) * 2012-01-30 2013-07-01 주식회사 에스폴리텍 Light guide panel that v-groove formed on
CN102840511A (en) * 2012-08-06 2012-12-26 京东方科技集团股份有限公司 Backlight module and display device
US20170003437A1 (en) * 2015-03-03 2017-01-05 Boe Technology Group Co., Ltd. Composite light guide plate and manufacturing method thereof, backlight module, and display device
KR20200077330A (en) * 2018-12-20 2020-06-30 주식회사 엘지화학 Light guide plate having air permability and air purifying filter including the same

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E601 Decision to refuse application