KR20120072472A - Backlight unit and display apparatus comprising the same - Google Patents

Backlight unit and display apparatus comprising the same Download PDF

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Publication number
KR20120072472A
KR20120072472A KR1020100134235A KR20100134235A KR20120072472A KR 20120072472 A KR20120072472 A KR 20120072472A KR 1020100134235 A KR1020100134235 A KR 1020100134235A KR 20100134235 A KR20100134235 A KR 20100134235A KR 20120072472 A KR20120072472 A KR 20120072472A
Authority
KR
South Korea
Prior art keywords
light source
substrate
source module
support member
connector
Prior art date
Application number
KR1020100134235A
Other languages
Korean (ko)
Inventor
이강석
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 KR1020100134235A priority Critical patent/KR20120072472A/en
Publication of KR20120072472A publication Critical patent/KR20120072472A/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/0075—Fastening of light sources or lamp holders of tubular light sources, e.g. ring-shaped fluorescent light sources
    • F21V19/008—Fastening of light sources or lamp holders of tubular light sources, e.g. ring-shaped fluorescent light sources of straight tubular light sources, e.g. straight fluorescent tubes, soffit lamps
    • F21V19/009—Fastening of light sources or lamp holders of tubular light sources, e.g. ring-shaped fluorescent light sources of straight tubular light sources, e.g. straight fluorescent tubes, soffit lamps the support means engaging the vessel of the source
    • 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
    • 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
    • G02F1/133608—Direct backlight including particular frames or supporting means
    • 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
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/46—Fixing elements

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

Abstract

According to an embodiment of the present invention, at least one light source module having a plurality of light emitting elements positioned on a substrate, an upper surface of the substrate, and a connector electrically connected to the light emitting elements on a lower surface thereof, corresponding to one surface of the substrate A backlight unit is provided and includes a support member having a plurality of connector insertion holes into which the connector can be inserted.

Description

BACKLIGHT UNIT AND DISPLAY APPARATUS COMPRISING THE SAME}

Embodiments include a backlight unit and a display device including the same.

A light emitting diode (LED) is an energy device that converts electrical energy into light energy, and has low power consumption and long life, and thus can be operated at low cost.

Recently, as the advantages of such light emitting diodes have been highlighted, technologies for using them as backlight units (BLUs) such as liquid crystal displays (LCDs) have been actively studied.

In general, a backlight unit for a liquid crystal display device has a direct light type in which the light source is arranged directly under the liquid crystal panel, and an edge type in which the light source is provided at the side of the light guide plate according to the installation form of the light source constituting the backlight. Edge light type).

The direct-type backlight unit is capable of increasing the size of the liquid crystal panel, and the dimming technology of the light emitting device according to the position is possible according to the brightness of the image.

In recent years, the size of the display device including the backlight unit is becoming very diverse. In order to make a backlight unit to be included in a display device of various sizes, it is necessary to design various substrates and light source modules for each size. Therefore, the substrate and the light sources disposed thereon must be manufactured in different shapes according to the sizes of the display devices. As a result, a manufacturing cost increases and a light source manufactured to a useless size has to be discarded.

The embodiment enables the backlight unit to be manufactured in various sizes by appropriately disposing a light source module manufactured to a standardized size.

The embodiment provides a backlight unit that is easily coupled and disassembled in part, so that only a corresponding part can be replaced when a failure occurs, thereby reducing the manufacturing cost of the entire backlight unit and the display device including the same.

An embodiment of the present invention is a substrate, a plurality of light emitting elements are located on the upper surface of the substrate, at least one light source module having a connector that is electrically connected to the light emitting elements is located on the lower surface, corresponding to one surface of the substrate And a support member having a plurality of connector insertion holes into which the connector can be inserted.

According to another exemplary embodiment of the present invention, a display device including the backlight unit is provided.

According to the embodiment, a light source module manufactured to a standardized size may be appropriately arranged to variously implement a backlight unit having a desired size.

In addition, according to the embodiment, since the light source module of the backlight unit can be partially combined and dismantled, only a corresponding part needs to be replaced when a failure occurs.

On the other hand, according to the embodiment, it is possible to manufacture a new size backlight unit without the development of new components.

1 is a cross-sectional view showing the configuration of a backlight unit according to an embodiment of the present invention.
2 is a perspective view illustrating a coupling relationship between a support member and a light source module according to an exemplary embodiment of the present invention.
3 is a plan view showing a configuration of a supporting member according to an embodiment of the present invention.
Figure 4a is a plan view showing the configuration of a light source module according to an embodiment of the present invention.
4B is a cross-sectional view of the light source module of FIG. 4A.

In the drawings, the thickness or size of each layer is exaggerated, omitted, or schematically illustrated for convenience and clarity of description. In addition, the size of each component does not necessarily reflect the actual size.

In the description of the embodiment according to the present invention, when described as being formed on the "on or under" of each element, the (on) or (under) (on) or under) includes both two elements being directly contacted with each other or one or more other elements are formed indirectly between the two elements. In addition, when expressed as "on" or "under", it may include the meaning of the downward direction as well as the upward direction based on one element.

Hereinafter, a backlight unit according to an embodiment of the present invention will be described with reference to the accompanying drawings.

1 is a cross-sectional view showing the configuration of a backlight unit according to an embodiment of the present invention.

Referring to FIG. 1, the backlight unit is coupled to the light source module 110, the light source module 110, a support member 120 supporting the light source module 110, and a transparent plate 130 disposed on the light source module 110. It may be configured to include).

The light source module 110 may include a plurality of light emitting devices. According to the exemplary embodiment of the present invention, the light source module 110 may include a plurality of light emitting elements 112 formed on the substrate 111. The plurality of light emitting devices 112 may be light emitting diode (LED) devices that emit monochromatic light, but may be implemented as other devices. For example, the plurality of light emitting devices 112 may be implemented as light emitting diode devices that emit light of the same color, but light emitting diodes emitting light of different colors (for example, R, G, and B). It can be implemented as an element. In this case, light of different colors may be combined to implement light of various colors such as white light. According to the exemplary embodiment of the present invention, the light source module 110 may be provided on at least one supporting member 120. One or more light source modules 110 are coupled to the support member 120. A detailed configuration of the support member 120 and the light source module 110 and a combination method of the two will be described later in detail.

The transparent plate 130 is disposed above the light source module 110 and is formed of a flat plate member having a predetermined thickness. For example, the transparent plate 130 may be made of transparent acrylic, polymethylmethacrylate (PMMA), plastic, glass, or the like. Some of the light emitted from the light source module 110 and directed toward the transparent plate 130 may be reflected from the surface of the transparent plate 130 to be directed toward the light source module 110, which is then directed toward the transparent plate 130. A reflective plate (not shown) may be further formed on the bottom surface of the light source module 110 to reflect in the direction. The reflector may be disposed on the bottom surface of the light source module 110 in the form of a thin film or a sheet, and may be coated with a reflective material.

2 is a perspective view showing the configuration of the support member 120 and the light source module 110 and the coupling relationship between the two according to an embodiment of the present invention, Figure 3 is a plan view showing the configuration of the support member 120. 4A is a plan view illustrating the configuration of the light source module 110, and FIG. 4B is a cross-sectional view of the light source module 110 of FIG. 4A taken along line a-a '.

2 to 4, the light source module 110 according to the embodiment of the present invention is formed in a specific size. For example, a specific number (for example, eight) of the light emitting elements 112 may be disposed on the substrate 111 having a constant size. The light emitting devices 112 may be connected in series with each other on one substrate 111. A connector 111a for coupling with the support member 120 is formed on the bottom surface of the substrate 111 of the light source module 110. The connector 111a is electrically connected to the light emitting devices 112 of the light source module 110, and may be formed at one end of the substrate 111 as shown in the drawing. It may be formed in the part. The light source module 110 according to the embodiment of the present invention is coupled to the support member 120 through the connector 111a. Specifically, the light source module 110 is coupled to the support member 120 by inserting the connector 111a on the bottom surface of the substrate 111 into the connector insertion hole 120a formed in the support member 120. The connector insertion hole 120a of the supporting member 120 is formed at regular intervals so that the light source module 110 may be disposed adjacent to each other. For example, in FIG. 3, the distance between the connector insertion holes 120a in the horizontal direction may be the same as the length of the substrate 111.

The outer surface of the connector 111a is formed of a conductive material, and the connectors 111a may be electrically connected to an external driving circuit (not shown) for driving the light emitting device 112 of the light source module 110. Accordingly, the light source module 110 coupled to the support member 120 may be driven by receiving power from an external driving circuit through the connector 111a. Electrical connection between the connector 111a inserted into the connector insertion hole 120a and the external driving circuit may be made through a flexible flat cable (FFC) or a flexible printed circuit board (FPCB). On the other hand, the coupling holes (111b, 120b) or coupling to the predetermined region of the substrate 111 and the support member 120 of the light source module 110 for a stable mechanical coupling between the light source module 110 and the support member 120 Grooves may be formed. The coupling member 140 may be inserted into the coupling holes 111b and 120b to firmly bond the light source module 110 to the support member 120. The coupling member 140 may couple the light source module 110 and the support member 120 through the coupling holes 111b and 120b by a rotation insertion method. Coupling member 140 may be formed of a member of a screw, nail or bolt and nut form. The coupling holes 111b formed in the substrate 111 may be formed at both sides of the substrate 111 in the longitudinal direction of the substrate 111, and may be formed at a predetermined interval d. In addition, the coupling hole 120b or the coupling groove of the support member 120 may be formed to correspond to the coupling hole 111b of the light source module 110 when the light source module 110 is arranged. However, the distance d between the coupling holes 120b formed in the support member 120 may be the same as the distance d between the coupling holes 111b formed in the substrate 111, but may be formed differently. . That is, when the light source module 110 is coupled to the support member 120, the coupling hole 120b formed in the support member 120 is coupled to a position corresponding to the coupling hole 111b of the substrate 111. If more than one hole 120b exists, it is sufficient. Preferably, the shortest distance between the connector 111a and the coupling hole 111b on the substrate 111 is the same as the distance between the connector insertion hole 120a and the coupling hole 120b on the support member 120. Can be.

According to the exemplary embodiment of the present invention, since the backlight unit is made only by inserting the light source module 110 having a specific size into the support member 120 in a desired shape, the backlight unit having a desired size can be freely implemented. . That is, by coupling the light source module 110 manufactured to a standardized size to the support member 120, it is possible to freely manufacture a backlight unit having a desired shape or size as needed. According to this, there is no need to manufacture a separate light source module 110 according to the size of the backlight unit required, it is possible to simplify the design or manufacturing, the light source module 110 is produced in a standardized size Since it can also be used for the manufacture of a backlight unit of size, the material lost or the like can be reduced. In addition, by using the backlight unit, display devices of various sizes can be manufactured without manufacturing a separate light source module for each size.

In addition, since the light source module is easily coupled and disassembled in part, only a corresponding part needs to be replaced when a defect occurs, thereby reducing the manufacturing cost of the backlight unit and the display device including the same.

Although the above description has been made with reference to the embodiments, these are only examples and are not intended to limit the present invention, and those of ordinary skill in the art to which the present invention pertains should not be exemplified above without departing from the essential characteristics of the present embodiments. It will be appreciated that many variations and applications are possible. For example, each component specifically shown in the embodiments can be modified and implemented. And differences relating to such modifications and applications will have to be construed as being included in the scope of the invention defined in the appended claims.

110: light source module
111: substrate
112: light emitting element
120: support member
130: transparent plate

Claims (8)

Board;
At least one light source module having a plurality of light emitting elements positioned on an upper surface of the substrate, and a connector electrically connected to the light emitting elements on a lower surface thereof; And
And a support member positioned corresponding to one surface of the substrate and having a plurality of connector insertion holes into which the connector can be inserted. The method of claim 1,
The plurality of connector insertion holes are formed at regular intervals so that the plurality of light source modules can be disposed adjacent to each other on the support member. The method of claim 1,
The connector is electrically connected to the external driving circuit. The method of claim 1,
The connector is formed on one end of the substrate. The method of claim 1,
And a coupling hole formed at the side of the substrate and at least one coupling hole or coupling groove formed in the support member corresponding to the coupling hole. The method of claim 5,
The substrate and the support member,
And a coupling member penetrating through a coupling hole on the substrate and coupled by a coupling member inserted into a coupling hole or a coupling groove of the support member corresponding to the coupling hole on the substrate. The method of claim 1,
And the plurality of light source modules includes the same number of light emitting elements. A display device comprising the backlight unit according to any one of claims 1 to 7.


KR1020100134235A 2010-12-24 2010-12-24 Backlight unit and display apparatus comprising the same KR20120072472A (en)

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KR1020100134235A KR20120072472A (en) 2010-12-24 2010-12-24 Backlight unit and display apparatus comprising the same

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Application Number Priority Date Filing Date Title
KR1020100134235A KR20120072472A (en) 2010-12-24 2010-12-24 Backlight unit and display apparatus comprising the same

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KR20120072472A true KR20120072472A (en) 2012-07-04

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9472602B2 (en) 2013-02-04 2016-10-18 Xiaomi Inc. Display systems and devices having array of photovoltaic material configured to absorb and convert light into electronic current
CN113763813A (en) * 2021-06-30 2021-12-07 深圳市南极光电子科技股份有限公司 Straight following formula mini LED backlight unit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9472602B2 (en) 2013-02-04 2016-10-18 Xiaomi Inc. Display systems and devices having array of photovoltaic material configured to absorb and convert light into electronic current
RU2608976C2 (en) * 2013-02-04 2017-01-30 Сяоми Инк. Display device and principle
CN113763813A (en) * 2021-06-30 2021-12-07 深圳市南极光电子科技股份有限公司 Straight following formula mini LED backlight unit

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