KR20120039243A - Backlight module - Google Patents

Backlight module Download PDF

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Publication number
KR20120039243A
KR20120039243A KR1020100100835A KR20100100835A KR20120039243A KR 20120039243 A KR20120039243 A KR 20120039243A KR 1020100100835 A KR1020100100835 A KR 1020100100835A KR 20100100835 A KR20100100835 A KR 20100100835A KR 20120039243 A KR20120039243 A KR 20120039243A
Authority
KR
South Korea
Prior art keywords
backlight module
auxiliary
auxiliary reflecting
light emitting
reflection
Prior art date
Application number
KR1020100100835A
Other languages
Korean (ko)
Inventor
웨이-쉥 웽
Original Assignee
론게발 프리시전 테크널러지컬 코포레이션
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
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Application filed by 론게발 프리시전 테크널러지컬 코포레이션 filed Critical 론게발 프리시전 테크널러지컬 코포레이션
Priority to KR1020100100835A priority Critical patent/KR20120039243A/en
Publication of KR20120039243A publication Critical patent/KR20120039243A/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
    • G02B6/0013—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
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0073—Light emitting diode [LED]
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133553—Reflecting elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side

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

Abstract

The present invention provides a backlight module that is easy to assemble, has a low incidence of defective products, can be reduced in cost, and can be reduced in weight. In the incidence plane of the light guiding means having an incidence plane, an outgoing plane and a reflection plane in the mounting frame, a plurality of light emitting units are mounted on one surface of the circuit board. A backlight module for guiding the light into the plane light after being emitted, and exiting the mounting frame from the exit surface, wherein the mounting frame has a first auxiliary reflecting surface made of plastic and facing the incident surface. At the same time, the first auxiliary reflecting means arranged to be inserted into the plurality of light emitting units of the light emitting means, and the second auxiliary reflecting surface made of a plastic material and facing the peripheral circumference adjacent to the incident surface on the exit surface It provides a backlight module having a second secondary reflecting means arranged to have.

Description

Backlight Module {BACKLIGHT MODULE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a backlight module, and more particularly, to a backlight module suitable for using a light emitting diode and capable of being lightweight.

In the liquid crystal display, the use of a cold cathode tube as a light emitting means in the backlight module has been mainstream, but recently, a white LED which is easy to be miniaturized is also adopted.

However, in order to replace the cold cathode tube which is a linear light source with the LED which is a point light source, a design change is necessary, for example, in addition to arranging LEDs in a line, it is necessary to hold them together with reflecting means.

By the way, in patent document 1, the reflecting means which has flexibility by apply | coating a reflecting paint to a polyethylene terephthalate sheet is disclosed. If such a configuration is adopted in the reflecting means of the backlight module, the light emission of the LED can be concentrated and sent to the light guiding means of the backlight module, but since it is flexible, it is easy to deform and arrange the LEDs in a line. It is difficult to form the structure which can hold | maintain one member stably. Therefore, the structure of the backlight module shown in FIG. 5 was disclosed in the industry.

The backlight module 1 includes a metal frame 11, a metal supporter 12 disposed in the metal frame 11, having an opening at one side thereof, and having a cross-section formed in a c-shape, and a metal supporter 12. The light emitting means 13 mounted on the bottom surface (that is, the surface on the opposite side of the opening) and the bottom wall 145 having the opening on one side and the opposite side of the opening are the light emitting means 13. The metal supporter 12 is formed to have a through hole 143 exposing the light emitting part 132 of the light emitting part 132, and the side wall 145 contacts the circuit board 131 of the light emitting means 13. In the reflective sheet 14 which is sandwiched inside and supported by the metal supporter 12, the plastic frame 16 coupled to the metal frame 11, the metal frame 11 and the plastic frame 16. The light guide means 15 is sandwiched by the light emitting portion 132 of the light emitting portion 132. . The reflective sheet 14 includes a polyethylene terephthalate layer 141 and a reflective paint layer 142, and the reflective paint layer 142 receives light from the light emitting portion 132 of the light emitting means 13. 15 is coated on the surface of the polyethylene terephthalate layer 141 facing the light emitting portion 132 and the light guiding means 15.

With this configuration, since the reflective sheet 14 formed of the flexible material is supported by the metal supporter 12, the assembling work can be simplified and the incidence of defective products can be effectively suppressed.

Taiwan Utility Model Notification M344443

In the configuration shown in Fig. 5, the problem that the reflective means having flexibility is easily deformed has been solved, but there is a problem that the weight becomes heavy because the metal material is multipurpose. Moreover, since the cost of a metal raw material is comparatively high and there are many fluctuations, there existed a problem also from the point of stable supply.

In order to solve the above problems, the present invention further improves the conventional LED type backlight module, easy to assemble, low incidence of defective products, low cost and light weight light emitting device and the light emitting device that can be reduced An object of the present invention is to provide a backlight module.

In order to achieve the above object, the present invention provides a plurality of light emission on one surface of a circuit board in the incidence surface of the light guiding means having an incidence surface, an outgoing surface and a reflection surface in the installation frame. A backlight module for guiding the light to be distributed by the light emitting means on which the unit is mounted, to be dispersed into the plane light, and exiting from the installation frame out of the installation frame.

A first auxiliary reflecting means made of a plastic material and having a first auxiliary reflecting surface facing the incidence surface and arranged so as to be inserted into the plurality of light emitting units of the light emitting means; And an auxiliary reflecting mechanism comprising second auxiliary reflecting means made of ash and arranged to have a second auxiliary reflecting surface that faces a peripheral periphery adjacent to the incident surface at the exit surface. It provides a backlight module, characterized in that.

In the backlight module, the first auxiliary reflecting means and the second auxiliary reflecting means may be integrally formed, and may be configured such that the auxiliary reflecting surfaces each have are perpendicular to each other.

In the backlight module, the first auxiliary reflecting means comprises a first supporting sheet and a first reflecting film adhered to the first supporting sheet, and the first auxiliary reflecting surface is the first reflecting film. The second auxiliary reflecting means consists of a 2nd support sheet and the 2nd reflecting film adhere | attached to the said 2nd support sheet, The said 2nd auxiliary reflecting surface is the said 2nd reflection It may also be configured to consist of the exposed surface of the film.

In the backlight module, the first auxiliary reflecting means may be configured to be a reflective film coated on the one surface of the circuit board.

In the backlight module, the second auxiliary reflecting means may be configured to be a reflective film interposed between the mounting frame and a peripheral circumference adjacent to the incident surface on the exit surface.

In the backlight module, it is preferable that a reflection sheet is interposed between the installation frame and the reflection surface.

The backlight module of the present invention having the above-described configuration does not require the step of installing the circuit board and the reflective sheet of the light emitting means in the metal supporter, which simplifies the assembly work, thereby lowering the incidence of defective products, reducing the cost, and reducing the weight. A backlight module can be provided.

1 is an exploded view showing the configuration of a first embodiment of a backlight module of the present invention.
2 is a cross-sectional view showing the configuration of a first embodiment of a backlight module of the present invention.
3 is a cross-sectional view showing the configuration of a second embodiment of a backlight module of the present invention.
4 is a cross-sectional view showing the configuration of a third embodiment of the backlight module of the present invention.
5 is a cross-sectional view showing an example of the configuration of a conventional backlight module.

EMBODIMENT OF THE INVENTION Hereinafter, each preferred embodiment of the backlight module of this invention is described in detail, referring drawings.

1 and 2 show the configuration of the first embodiment of the backlight module of the present invention, Figure 1 is an exploded view, Figure 2 is a cross-sectional view.

As shown in Figs. 1 and 2, the backlight module of the present invention is assembled by the first frame body 31 and the second frame body 32, and the opening is formed on the second frame body 32 side. In the mounting frame 3, one surface 412 of the circuit board 41 at the entrance surface 511 of the light guiding means 51 having the entrance surface 511, the exit surface 513, and the reflection surface 512. A backlight module that guides the light emitting means 4 having a plurality of light emitting units 42 mounted thereon so as to be dispersed into planar light, and exits from the opening of the installation frame 3 serving as the emission surface 513. to be. The reflective sheet 63 is interposed between the first frame 31 and the reflective surface 512 of the light guide means 51.

In the mounting frame 3, the first auxiliary reflective surface 614, which is made of a plastic material and also faces the incident surface 511 of the light guiding means 51, has a plurality of light emitting means 4. A first auxiliary reflecting means 61 having a plurality of through holes 613 inserted in correspondence to the two light emitting units 42, a plastic material, and an exit surface 513 of the light guiding means 51; 2nd auxiliary reflection arrange | positioned so that it may have the 2nd auxiliary reflection surface 624 facing the part covered by the 2nd frame body 32 in the periphery which adjoins the incident surface 511 in the surface. An auxiliary reflecting mechanism 6 having means 62 is incorporated.

In this first embodiment, the first auxiliary reflecting means 61 is composed of a first support sheet 611 and a first reflective film 612 bonded to the first support sheet 611, and the first The auxiliary reflective surface 614 is partitioned by the exposed surface of the first reflective film 612. The 2nd auxiliary reflection means 62 consists of the 2nd reflection film 622 adhere | attached on the 2nd support sheet 621 and the 2nd support sheet 621, The 2nd auxiliary reflection surface 624, It is partitioned by the exposed surface of the 2nd reflective film 622. FIG.

In addition, the first auxiliary reflecting means 61 and the second auxiliary reflecting means 62 are integrally formed, and the first auxiliary reflecting surface 614 and the second auxiliary reflecting surface 624 each of which are integral with each other. It can be configured to be orthogonal.

3 shows a configuration of a second embodiment of the backlight module of the present invention.

As shown, this second embodiment has a configuration similar to that of the first embodiment, and therefore the differences thereof will be described in detail below.

In the second embodiment, unlike the first embodiment, the first auxiliary reflecting means 61 and the second auxiliary reflecting means 62 are not integral but are arranged independently of each other.

The first auxiliary reflecting means 61 is constituted by the first supporting sheet 611 and the first reflective film 612 adhered to the first supporting sheet 611 as in the first embodiment, but the second auxiliary reflecting means 61 The reflecting means 62 is a portion covered by the second frame body 32 and a second frame around the periphery adjacent to the incident surface 511 on the exit surface 513 of the light guide means 51. It is comprised by the reflective film 623 interposed between the sieve 32. As shown in FIG.

4 shows a configuration of a third embodiment of the backlight module of the present invention.

As shown, this third embodiment has a configuration similar to that of the second embodiment, and therefore, the differences will be described in detail below.

In this third embodiment, the first auxiliary reflecting means 61 is constituted by a reflecting film 615 coated on the one surface 412 of the circuit board 41 of the light emitting means 4. It is.

As for the second auxiliary reflecting means 62, similarly to the second embodiment, the second frame body (at a peripheral circumference adjacent to the incident surface 511 on the exit surface 513 of the light guide means 51) It is comprised by the reflective film 623 interposed between the part covered by 32 and the 2nd frame body 32. As shown in FIG.

[Industrial Availability]

The backlight module of this invention by the said structure does not require the process of providing the circuit board of a light emitting means and a reflection sheet in a metal supporter, but also makes assembly work simpler, and the incidence of defective products is low, low cost, and light weight are reduced. A backlight module can be provided.

3: installation frame
31: first frame
32: second frame
4: light emitting means
41: circuit board
412: one side
42: light emitting unit
51: light guiding means
511: entrance face
512: reflecting surface
513: exit surface
6: auxiliary reflector
61: first auxiliary reflecting means
611: first support sheet
612: first reflective film
613: through
614: First auxiliary reflective surface
615: reflective film
62: second auxiliary reflecting means
621: second support sheet
622: second reflective film
623: reflective film
624: second auxiliary reflective surface
63: reflective sheet

Claims (6)

Light emitting means in which a plurality of light emitting units are mounted on one surface of a circuit board in the incidence surface of the light guiding means having an incidence surface, an outgoing surface and a reflection surface in the mounting frame. As a backlight module for guiding to be dispersed into the plane light after receiving the light emitted from, and exiting the installation frame from the exit surface,
In the installation frame,
A first auxiliary reflecting means made of a plastic material and having a first auxiliary reflecting surface facing the incident surface and arranged to be inserted into the plurality of light emitting units of the light emitting means;
An auxiliary reflecting mechanism comprising a second auxiliary reflecting means made of a plastic material and arranged to have a second auxiliary reflecting surface facing a peripheral circumference adjacent to the incident surface at the exit surface; That is, the backlight module. The method of claim 1,
The first auxiliary reflecting means and the second auxiliary reflecting means are integrally formed, and the auxiliary reflecting surfaces each have are perpendicular to each other. The method of claim 1,
The first auxiliary reflecting means comprises a first supporting sheet and a first reflecting film adhered to the first supporting sheet, and the first auxiliary reflecting surface is made of an exposed surface of the first reflecting film. ,
The said 2nd auxiliary reflection means consists of a 2nd support sheet and the 2nd reflection film adhere | attached to the said 2nd support sheet, The said 2nd auxiliary reflection surface becomes the exposed surface of the said 2nd reflection film. , Backlight module. The method of claim 1,
The said 1st auxiliary reflection means is a backlight module which is apply | coated and formed in the said one surface in the said circuit board. The method of claim 1,
The second auxiliary reflecting means is a backlight module which is interposed between the mounting frame and a peripheral circumference adjacent to the incident surface on the exit surface. The method of claim 1,
A backlight module, wherein a reflection sheet is interposed between the installation frame and the reflection surface.
KR1020100100835A 2010-10-15 2010-10-15 Backlight module KR20120039243A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020100100835A KR20120039243A (en) 2010-10-15 2010-10-15 Backlight module

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020100100835A KR20120039243A (en) 2010-10-15 2010-10-15 Backlight module

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KR20120039243A true KR20120039243A (en) 2012-04-25

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KR1020100100835A KR20120039243A (en) 2010-10-15 2010-10-15 Backlight module

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102767759A (en) * 2012-07-04 2012-11-07 深圳市华星光电技术有限公司 Liquid crystal display device and backlight module thereof
CN103629599A (en) * 2013-11-08 2014-03-12 深圳市华星光电技术有限公司 Backlight module

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102767759A (en) * 2012-07-04 2012-11-07 深圳市华星光电技术有限公司 Liquid crystal display device and backlight module thereof
CN103629599A (en) * 2013-11-08 2014-03-12 深圳市华星光电技术有限公司 Backlight module
US9417374B2 (en) 2013-11-08 2016-08-16 Shenzhen China Star Optoelectronics Technology Co., Ltd. Backlight module

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