KR20140046817A - Reflector plate and backlight unit including the plate - Google Patents

Reflector plate and backlight unit including the plate Download PDF

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Publication number
KR20140046817A
KR20140046817A KR1020120112960A KR20120112960A KR20140046817A KR 20140046817 A KR20140046817 A KR 20140046817A KR 1020120112960 A KR1020120112960 A KR 1020120112960A KR 20120112960 A KR20120112960 A KR 20120112960A KR 20140046817 A KR20140046817 A KR 20140046817A
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KR
South Korea
Prior art keywords
reflector
light source
light
plate
reflecting
Prior art date
Application number
KR1020120112960A
Other languages
Korean (ko)
Inventor
안경수
정윤모
박상준
이동현
김태경
Original Assignee
엘지이노텍 주식회사
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Publication date
Application filed by 엘지이노텍 주식회사 filed Critical 엘지이노텍 주식회사
Priority to KR1020120112960A priority Critical patent/KR20140046817A/en
Publication of KR20140046817A publication Critical patent/KR20140046817A/en

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    • 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
    • G02F1/133615—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 present invention relates to a reflecting plate and a backlight unit including the same. The reflecting plate according to the present invention includes: an optical source; and a reflecting unit which includes the optical source in the center thereof and a rising unit which rises from the center with the optical source to both ends thereof.

Description

Reflector and backlight unit including the same {Reflector plate and backlight unit including the plate}

The present invention relates to a reflective plate and a backlight unit including the same, and more particularly, to a reflective plate capable of minimizing the width of a bezel and removing a light guide plate, and a backlight unit including the same.

2. Description of the Related Art Generally, a liquid crystal display (LCD) is one of flat panel display devices for displaying images using a liquid crystal, and is thinner and lighter than other display devices, has advantages of low power consumption and low driving voltage And is widely used throughout the industry.

Such a liquid crystal display device is composed of a liquid crystal display panel for displaying an image and a backlight unit for providing light to the liquid crystal display panel.

The backlight unit may include a light source for generating light, a light guide plate that changes a path of light incident from the light source, and emits light toward the liquid crystal display panel, and a plurality of optical sheets and storage containers for improving luminance characteristics of light emitted from the light guide plate. Include. Here, the plurality of optical sheets include a diffusion sheet for diffusing light and a prism sheet for condensing light.

Such a backlight unit may be employed and used in any device using an LCD panel as well as a liquid crystal display device.

By the way, the light guide plate generally used in the backlight unit causes a problem of increasing the manufacturing cost and weight of the backlight unit. To overcome this, there was a need for a structure of a backlight unit without a light guide plate.

1 to 3 illustrate a backlight unit according to the prior art.

As shown in FIG. 1, the backlight unit according to the related art is configured such that a light source is provided under the bezel 111 at both ends.

As illustrated in FIGS. 2 and 3, a heat bar 120 is disposed below the bezel 111 of the backlight unit, and a light source 130 is disposed at the bottom and the inside of the heat bar 120. .

The light source 130 is generally implemented as a light emitting diode (LED), and the heat bar 120 functions to emit heat generated from the image and the light source 130 to the outside.

The light source 130 of the backlight unit configured as described above is configured in plural, as shown in FIG. 2, disposed at both ends of the backlight unit to emit light toward the center of the backlight unit.

However, according to the related art, a separate light guide plate for evenly diffusing the light from the light source 130 must be provided in the backlight unit, and a light source disposed at both ends of the backlight unit. Due to the configuration of the 130 and the heat bar 120, there was a limit in reducing the width of the bezel 111.

The present invention has been made to solve the above-described problem, by arranging a light source in the center of the reflecting plate to uniformly diffuse the light from the light source to the optical sheet side, the backlight unit comprising the reflecting plate is a separate light guide plate To avoid the need to have a (Light Guide Plate).

In addition, the present invention is configured to further include a reflecting member in the reflecting plate to remove the dark portion formed on the upper portion of the light source and to improve the uniformity of light from the light source.

In addition, the present invention is to minimize the width of the bezel (bezel) in the light source is disposed in the center of the reflector of the backlight unit, compared to the conventional backlight unit is installed at both ends or one end.

Reflector according to an embodiment of the present invention for solving the above problems, the light source; A reflection unit having the light source disposed at a center portion and having a rising portion rising from both ends at the center of the light source; And a reflection member provided on the reflection portion.

According to another embodiment of the present invention, the reflective member is configured such that the reflective surface reflects light from the light source to the top of the support member.

According to another embodiment of the present invention, the reflecting member is a pair of the first reflecting member and the second reflecting member, the first reflecting member and the second reflecting member is disposed at the same distance around the light source do.

According to another embodiment of the present invention, the rising part is formed to have a rising curvature toward both ends from the central portion where the light source is disposed.

According to another embodiment of the present invention, the reflector is configured to gradually increase in thickness from the central portion where the light source is disposed to both ends of the reflector.

According to another embodiment of the present invention, a plurality of light sources are provided in a row at a central portion of the reflecting unit.

According to another embodiment of the present invention, the light source includes: a first LED emitting light to first ends of both ends of the reflector; And a second LED emitting light to second ends of both ends of the reflector.

According to another embodiment of the present invention, the first LED and the second LED are alternately arranged in a row.

According to another embodiment of the present invention, the light source is composed of a double-sided LED that emits light to both ends of the reflector.

According to another embodiment of the present invention, the light source is a pair of cross-sectional LED for emitting light to the cross-section, and emits light to both ends of the reflector.

The backlight unit according to an embodiment of the present invention includes a reflector according to the above embodiment.

The backlight unit according to another exemplary embodiment of the present invention may further include an optical sheet disposed on the reflective plate.

According to the present invention, since a light source is disposed at the center of the reflecting plate to uniformly diffuse the light from the light source toward the optical sheet, the backlight unit including the reflecting plate does not need to have a separate light guide plate.

In addition, according to the present invention can be configured to further include a reflecting member in the reflecting plate to remove the dark portion formed on the upper portion of the light source and to improve the uniformity of light from the light source.

In addition, since the light source is disposed at the center of the reflector in the backlight unit using the reflector according to the present invention, the width of the bezel may be minimized as compared with the backlight unit having the light sources installed at both ends or one end of the related art.

1 to 3 illustrate a backlight unit according to the prior art.
4 is a top view of a reflector according to an embodiment of the present invention.
5 is a cross-sectional view of a reflector according to an embodiment of the present invention.
6 is a cross-sectional view of a reflector according to another embodiment of the present invention.
7 to 9 are views for explaining a method of arranging a light source according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail to avoid unnecessarily obscuring the subject matter of the present invention. In addition, the size of each component in the drawings may be exaggerated for the sake of explanation and does not mean a size actually applied.

A reflective plate according to an embodiment of the present invention will be described with reference to FIGS. 4 and 5.

4 is a top view of a reflecting plate according to an embodiment of the present invention, and FIG. 5 is a cross-sectional view of the reflecting plate according to an embodiment of the present invention.

4 and 5, the reflector plate 400 according to the exemplary embodiment of the present invention is configured such that the light source 420 is disposed at the center of the reflector 440.

The light source 420 is disposed at the center of the reflector 440 to emit light toward both ends of the reflector 440 and the reflector 440. Accordingly, the light from the light source 420 is reflected by the reflector 440 and evenly spreads to the front surface of the optical sheet 430.

The light source 420 is attached to the support member 410 provided on the reflector 440.

In this case, a light emitting diode (LED) may be used as the light source 420.

As shown in FIG. 4, the reflector 440 is provided with rising portions that rise from both ends of the center where the light source 420 is disposed, and the rising portion of the reflecting portion 440 is supported by the light source 420. It is configured to be symmetrical to both sides with respect to the member 410.

As illustrated in FIG. 4, a plurality of light sources 420 are provided in the center of the reflector 440 to emit light to both ends of the reflector 440.

As shown in FIG. 5, the rising part of the reflecting part 440 may be formed to have a rising curvature toward both ends of the reflecting part 440 from the center where the light source 420 is disposed. The thickness is gradually increased from the center where the 420 is disposed to both ends of the reflector 440.

In another embodiment, the rising portion of the reflector 440 may be formed in a straight line having a predetermined slope, or may be formed of a plurality of linear reflectors having different inclinations.

The reflector 440 is configured to send as much light as possible from the light source 420 to a region far from the light source, that is, to both ends of the reflector 440.

The optical sheet 430 is disposed on the upper portion of the reflector plate 400 configured as described above and included in the backlight unit, and the prism sheet and the protective sheet are further disposed on the optical sheet 430. Can be. However, according to the present invention, since the light source 420 is disposed at the center of the reflecting plate 400 to uniformly diffuse the light from the light source toward the optical sheet 430, there is no need for a separate light guide plate.

In addition, since the light source 420 is disposed at the center of the reflector 400 in the backlight unit using the reflector according to the present invention, a bezel is compared with a backlight unit provided with light sources at both ends or one end of the conventional reflector. The width of the can be minimized.

6 is a cross-sectional view of a reflector according to another embodiment of the present invention.

Hereinafter, with reference to Figure 6 will be described a reflecting plate according to another embodiment of the present invention.

In the embodiment shown in FIG. 6, the reflector 440 is provided on the reflector plate 400, and the light source 420 is disposed at the center of the reflector 440.

The light source 420 is disposed at the center of the reflector 440 and emits light to both ends of the reflector 440 and the reflector 440.

In this case, as shown in FIG. 6, the light source 420 is attached to the support member 410 provided on the reflector 440, and the reflector 440 is positive from the center where the light source 420 is disposed. A rising part that is raised to an end is provided, and the rising part of the reflecting part 440 is configured to be symmetric with respect to the support member 410 on which the light source 420 is installed. The plurality of light sources 420 are provided in a row at the center of the reflector 440 to emit light at both ends of the reflector 440.

The rising part of the reflecting part 440 may be formed to have a rising curvature from the center where the light source 420 is disposed to both ends of the reflecting part 440, and from the center where the light source 420 is disposed. The thickness is gradually increased at both ends of the reflector 440.

In this case, in the embodiment of FIG. 6, the reflective member 445 is provided on the reflective part 440.

When the light source 420 is configured to be attached to the support member 410 on the reflector 440, light is emitted from the light source 420 toward both ends of the reflector 440, so that the light source 420 is Darkness may occur on the top of the arrangement.

However, when the reflective member 445 is formed on the reflective part 440, the light emitted from the light source 420 is reflected by the reflective member 445 to remove the dark part generated on the light source 420. can do.

In addition, the reflective member 445 is a pair of the first reflecting member and the second reflecting member, the first reflecting member and the second reflecting member is disposed at the same distance with respect to the light source 420.

Meanwhile, in the embodiment of FIG. 6, the rising part of the reflecting part 440 may be formed in a straight line having a predetermined slope, or may be formed of a plurality of linear reflecting parts having different inclinations.

In addition, as in the embodiment illustrated in FIG. 5, an optical sheet 430 is disposed on the reflective plate 400 to form a backlight unit, and a prism sheet and a protective sheet are disposed on the optical sheet 430. The light guide plate may be uniformly diffused toward the optical sheet 430 even without a separate light guide plate.

7 to 9 are views for explaining a method of arranging a light source according to another embodiment of the present invention.

The light source 420 is disposed at the center of the reflector 440 of the reflector 400, and emits light to both ends of the reflector 440.

In this case, the light source 420 may be attached to the support member 410 provided on the reflector 440, and a light emitting diode (LED) may be used as the light source 420.

The plurality of light sources 420 are provided in the center of the reflector 440 in a row, and are configured to emit light to both ends of the reflector 440.

In this case, as illustrated in FIG. 7, the light source 420 may be configured as a double-sided LED emitting light to both ends of the reflector 440.

In another embodiment, as shown in FIG. 8, a first LED emitting light to first ends of both ends of the reflector 440 and a second LED emitting light to second ends of both ends. It may be configured to include an LED, wherein the first LED and the second LED may be arranged in a row alternately on the support member 410.

In addition, in another embodiment, as shown in FIG. 9, the LEDs that emit light only in the cross section may be configured to form a pair, and may be configured to emit light to both ends of the reflector 440.

In the foregoing detailed description of the present invention, specific examples have been described. However, various modifications are possible within the scope of the present invention. The technical spirit of the present invention should not be limited to the above-described embodiments of the present invention, but should be determined by the claims and equivalents thereof.

400: reflector
410: support member
420: Light source
430: optical sheet
440: reflector
445: reflective member

Claims (13)

Light source;
A reflection unit having the light source disposed at a center portion and having a rising portion rising from both ends at the center of the light source; And
A reflection member provided on the reflection part;
Reflector configured to include. The method according to claim 1,
A support member provided on the reflector to which the light source is attached;
Reflector comprising more. The method according to claim 2,
Wherein the reflective member comprises:
A reflecting plate, the reflecting plate is configured to reflect light from the light source to the top of the support member. The method according to claim 1,
Wherein the reflective member comprises:
A reflector plate having a pair of first reflecting members and a second reflecting member, wherein the first reflecting member and the second reflecting member are disposed at the same distance around the light source. The method according to claim 1,
The rising portion,
Reflecting plate is formed to have a rising curvature toward both ends of the reflecting portion from the center of the light source is disposed. The method according to claim 1,
The reflector includes:
A reflector plate that gradually increases in thickness from the center of the light source is disposed to both ends of the reflector. The method according to claim 1,
The light source includes:
Reflector plate provided in a plurality in a row at the center of the reflector. The method according to claim 1,
The light source includes:
First LEDs emitting light to first ends of both ends of the reflector; And
Second LEDs emitting light to second ends of both ends of the reflector;
Reflector comprising a. The method according to claim 8,
The first LED and the second LED,
Alternating reflectors arranged in a row. The method according to claim 1,
The light source includes:
Reflector consisting of a double-sided LED for emitting light to both ends of the reflector. The light source includes:
A reflector plate which emits light to both ends of the reflector in a pair of cross-sectional LED for emitting light to the cross-section. A backlight unit comprising the reflector according to any one of claims 1 to 11. The method of claim 12,
An optical sheet disposed on the reflective plate;
A backlight unit further comprising.
KR1020120112960A 2012-10-11 2012-10-11 Reflector plate and backlight unit including the plate KR20140046817A (en)

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KR1020120112960A KR20140046817A (en) 2012-10-11 2012-10-11 Reflector plate and backlight unit including the plate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020120112960A KR20140046817A (en) 2012-10-11 2012-10-11 Reflector plate and backlight unit including the plate

Publications (1)

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KR20140046817A true KR20140046817A (en) 2014-04-21

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160016020A (en) * 2014-08-01 2016-02-15 엘지디스플레이 주식회사 Reflector for uniform brightness and liquid crystal display device having thereof
KR101677860B1 (en) * 2015-09-17 2016-11-21 희성전자 주식회사 Backlight unit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160016020A (en) * 2014-08-01 2016-02-15 엘지디스플레이 주식회사 Reflector for uniform brightness and liquid crystal display device having thereof
KR101677860B1 (en) * 2015-09-17 2016-11-21 희성전자 주식회사 Backlight unit

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