KR20080063969A - Backlight unit and liquid crystal display using the same - Google Patents

Backlight unit and liquid crystal display using the same Download PDF

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Publication number
KR20080063969A
KR20080063969A KR1020070000626A KR20070000626A KR20080063969A KR 20080063969 A KR20080063969 A KR 20080063969A KR 1020070000626 A KR1020070000626 A KR 1020070000626A KR 20070000626 A KR20070000626 A KR 20070000626A KR 20080063969 A KR20080063969 A KR 20080063969A
Authority
KR
South Korea
Prior art keywords
wiring
wire
opening
liquid crystal
crystal display
Prior art date
Application number
KR1020070000626A
Other languages
Korean (ko)
Inventor
최영준
Original Assignee
삼성전자주식회사
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 삼성전자주식회사 filed Critical 삼성전자주식회사
Priority to KR1020070000626A priority Critical patent/KR20080063969A/en
Publication of KR20080063969A publication Critical patent/KR20080063969A/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
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0083—Details of electrical connections of light sources to drivers, circuit boards, or the like
    • 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/50—Protective arrangements

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

Abstract

The present invention relates to a backlight unit and a liquid crystal display device having the same, and more particularly, to a backlight unit having a wiring alignment portion in which a wiring lead portion is located in a light source direction, and a liquid crystal display device having the same. According to the present invention, since the wire inlet of the wire alignment unit is formed in a direction different from the inlet of the opening, the wire fixed to the wire alignment unit does not protrude to the outside of the opening, so that the wire is damaged at the edge of the upper housing member fastened to the lower housing member. It is possible to provide a backlight unit and a liquid crystal display device having the same, which can prevent the reworking cost due to wiring damage. In addition, the present invention can provide a backlight unit and a liquid crystal display device having the same that can prevent the interference of the wiring when fastening the upper housing member and the lower housing member to improve the assembly workability.

Description

BACKLIGHT UNIT AND LIQUID CRYSTAL DISPLAY USING THE SAME}

1 is a schematic exploded perspective view of a backlight unit according to the present invention;

FIG. 2 is a schematic rear view illustrating an enlarged area A of FIG. 1; FIG.

3 is a schematic exploded perspective view of a liquid crystal display device according to the present invention;

4 is an enlarged schematic plan view of a region B of FIG. 3.

<Explanation of symbols for the main parts of the drawings>

100: wiring 200: lower housing member

202: opening 220: wiring alignment

220a: wiring alignment area 220b: wiring entry area

300: lamp unit 400: light guide plate

500: optical sheet 2200: liquid crystal display panel

2400: upper housing member

The present invention relates to a backlight unit and a liquid crystal display device having the same, and more particularly, to a backlight unit having a wiring alignment portion in which a wiring lead portion is located in a light source direction, and a liquid crystal display device having the same.

In general, the liquid crystal display (LCD) is expanding its application range due to features such as lightweight, thin, low-power drive, full-color, high-resolution implementation. Currently, liquid crystal displays are used in computers, notebooks, PDAs, telephones, TVs, and audio / video devices. Such a liquid crystal display displays a desired image on a liquid crystal display panel in which light transmittance is adjusted according to image signals applied to a plurality of control switches arranged in a matrix form.

The liquid crystal display includes a liquid crystal display panel for displaying an image and a backlight unit provided under the liquid crystal display panel to supply light to the liquid crystal display panel. In this case, an upper accommodating member is provided at an upper portion of the liquid crystal display panel to protect and accommodate the liquid crystal display panel and the backlight unit, and a lower accommodating member is provided at the lower portion of the backlight unit.

In addition, the backlight unit of the liquid crystal display according to the prior art as described above includes a light source and an optical sheet for improving the quality of light emitted from the light source, the light source is provided on the side of the optical sheet according to the type and position of the light source The edge type backlight unit and the light source may be divided into a direct type backlight unit provided on the lower surface of the optical sheet.

In this case, the liquid crystal display including the edge type backlight unit using the lamp as a light source connects the wire connected to the external power source to the lamp through an opening in which a wire alignment part is formed in the lower housing member.

However, in the liquid crystal display device having the backlight unit according to the related art, as the wiring lead portion of the wiring alignment portion is formed in the direction of the upper housing member, the assemblability is degraded by the wiring when the upper housing member is fastened and fixed to the wiring alignment portion. If the wire is protruded there is a problem that can be damaged at the edge of the upper housing member.

In addition, due to such wiring damage, there is a problem that the manufacturing cost increases due to an increase in the cost of lighting of the lamp and replacement of damaged wiring.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art, and to provide a backlight unit in which wiring is not damaged by an upper accommodating member and a liquid crystal display device having the same.

In addition, another object of the present invention is to provide a backlight unit and a liquid crystal display device having the same, which enables fastening of the upper housing member by fixing the wiring efficiently.

In order to achieve the above object, the present invention provides a light source, an accommodating member accommodating the light source, and an opening formed at one side thereof, a wire connected to the light source to supply power to the light source, and exposed to the outside through the opening; The backlight unit is formed in the opening to fix the wiring, and the wiring inlet includes a wiring alignment unit having a direction different from that of the opening of the opening.

The wire aligning part is formed at one side thereof, and the wire aligning part is formed to surround a partial region of the wire so that the wire can be fixed.

In this case, the wire alignment unit may be a "c" shape, but is not limited thereto. The wire alignment unit may be formed in a "b" shape, and may be attached to the opening to form a wire lead-in part.

In addition, the present invention is to receive the light source and the light source and the lower housing member having an opening formed on one side and the light source for supplying power to the light source and to secure the wiring and the wire exposed to the outside through the opening; A liquid crystal display device comprising: a backlight unit formed in the opening and including a wiring alignment part having a wiring entry part different from an opening of the opening, and a liquid crystal display panel for receiving light from the backlight unit and displaying an image. to provide.

In this case, the liquid crystal display panel may further include an upper accommodating member coupled to a lower accommodating member.

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

However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms, and only the embodiments are intended to complete the disclosure of the present invention, and to those skilled in the art to fully understand the scope of the invention. It is provided to inform you. Like reference numerals in the drawings refer to like elements.

1 is a schematic exploded perspective view of a backlight unit according to the present invention, and FIG. 2 is an enlarged schematic rear view of a region A of FIG. 1.

As shown in FIGS. 1 and 2, the backlight unit according to the present invention includes a light guide plate 400, a lamp unit 300 provided on a side surface of the light guide plate 400, and upper and lower portions of the light guide plate 400. The optical sheet 500 is provided, and a wiring 100 for applying power to the lamp unit 300. In addition, the light guide plate 400 and a lower accommodating member 200 for accommodating the light source and the optical sheet 500 are included.

The light guide plate 400 is for converting light emitted from the light source into a surface light source, and is made of a transparent material having a constant refractive index, such as polyolefin or polycarbonate, which is usually an acrylic resin, PMMA (Poly Methy Methacrylate). The light guide plate 400 as described above may include at least one of a molded light guide plate, a light scattering light guide plate, and a hollow light guide plate.

The lamp unit 300 is a light source of the backlight unit according to the present exemplary embodiment, and may include a lamp 310 and a lamp cover 320 provided on the light incident surface of the light guide plate 400. In this embodiment, the light incident surface will be described by taking an edge type backlight unit positioned on the side of the light guide plate 400 as an example, and the light emitted from the lamp unit 300 is incident on the light incident surface of the light guide plate 400. And is emitted upward through the light guide plate 400. In FIG. 1, the light incident surface of the light guide plate 400 is illustrated as one side, but is not limited thereto. The light incident surface of the light guide plate 400 may be one side and the other side facing the light guide plate 400.

The lamp 310 mainly uses a cold cathode fluorescent lamp, each of the lamps 310 is composed of a glass tube, the inert gas contained in the glass tube, the negative electrode and the positive electrode is provided at both ends of the glass tube. At this time, the phosphor is coated on the inner wall of the glass tube. In addition, although one lamp is used in FIG. 1, the present invention is not limited thereto, and the number of lamps 310 may be determined according to the required luminance.

The lamp cover 320 reflects the light that is not incident on the light incident surface of the light guide plate 400 among the light emitted from the lamp 310 to re-inject into the light guide plate 400, and surrounds the lamp 310. The light emitted from the lamp 310 may be formed in a 'c' shape so that the light emitted from the lamp 310 may be incident on the light incident surface of the light guide plate 400.

The optical sheet 500 is to improve the quality and efficiency of the light emitted through the light guide plate 400 in the lamp unit, which is a light source, and in this embodiment, the diffusion sheet 520, the prism sheet 510, and the reflective sheet ( 530 may be included.

The diffusion sheet 520 is positioned on the upper surface of the light guide plate 400 to uniformly diffuse the light emitted from the light guide plate 400 and transmit the light toward the front direction of the prism sheet 510 and the liquid crystal display panel (not shown). In order to widen and reduce diffusion of bright spots, bright lines, and stains, the light guide plate 400 is preferably located between the prism sheet 510. The diffusion sheet 520 may be manufactured using polycarbonate (PC) resin or polyester (PET) resin.

The prism sheet 510 is intended to be incident on a liquid crystal display panel (not shown) by increasing the luminance by refracting and condensing the light emitted from the light guide plate 400. For this purpose, the upper surface of the light guide plate 400, that is, the light guide plate ( It is preferably located between 400 and a liquid crystal display panel (not shown). As the prism sheet 510, a strip-shaped micro-prism is formed on a base material such as polyester, and two horizontal and vertical sheets may be used as one set.

The reflective sheet 530 reflects light exiting to the lower surface of the light guide plate 400 to be incident into a liquid crystal display panel (not shown) and prevents light spots. The light guide plate 400 may be positioned on a bottom surface of the light guide plate 400. The reflective sheet 530 may be manufactured using, for example, white foamed PET, and it is preferable to increase the reflectance by forming a multilayer air layer. In this case, the reflective sheet 530 may be omitted by forming a material having excellent reflection efficiency on the bottom surface of the lower housing member 200. In addition, the reflective sheet 530 may be integrally formed with the lower accommodating member 200.

The lower accommodating member 200 is for accommodating the light guide plate 400, the light source, and the optical sheet 500, and includes a flat base portion, a sidewall extending from the base portion, and a partial region of the base portion and the sidewalls. It includes an opening 202 formed in. The opening 202 may be formed at one side of the lower accommodating member 200 that is close to the area where the lamp is provided, and may be formed by removing a portion of the base portion and a portion of the sidewall of the lower accommodating member 200. In addition, the opening 202 is divided into a wire alignment unit region 220a in which a wire alignment unit 220 is formed and a wire insertion region 220b which is a space for inserting the wire 100 into the wire alignment unit 220. Can be.

The wire alignment unit 220 is to align the wire 100 to the opening 202 formed in the lower housing member 200 and to protect the wire 100 from the sharp edge of the opening 202. A hook having a shape of "c" having an opening and having a wire lead portion 221 may be used. However, the present invention is not limited thereto, and the wire alignment unit 220 may block a portion of the inlet direction of the opening 202 by using a hook of the "a" shape to form a wire lead-in to accommodate the wire.

In this case, the wire lead-in part 221 may be smaller than the diameter of the wire 100 so that the wire 100 may be fixed in the wire alignment unit 220. In addition, the wire alignment unit 220 according to the present invention is formed so as to face the wire lead-in area 220b so that the wire lead-in portion 221 is formed in a direction different from the inlet of the opening 202.

As such, the present invention is connected to the lamp 310 through the wiring alignment unit 220 formed in the opening 202 in the rear of the lower housing member 200 is connected to the lamp driving unit (not shown) such as an inverter Thus, the wiring 100 positioned on the rear surface of the lower housing member 200 may be easily aligned.

In addition, the wiring alignment unit 220 may be formed in the opening 202 such that the wiring 100 may not be damaged at the edge of the opening 202, and the wiring lead 221 of the wiring alignment unit 220 may be damaged. May be formed in a direction different from that of the opening of the opening 202 so that the wiring 100 fixed to the wiring alignment unit 220 may not be bent to the outside of the opening 202 to protrude.

Next, a liquid crystal display having a backlight unit according to the present invention will be described with reference to the accompanying drawings. Descriptions overlapping with the description of the backlight unit according to the present invention described above will be omitted or briefly described.

3 is a schematic exploded perspective view of a liquid crystal display according to the present invention, and FIG. 4 is an enlarged schematic plan view of a region B of FIG. 3.

3 and 4, the liquid crystal display according to the present invention includes a liquid crystal display panel 2200 and a wiring 100 for supplying light to the liquid crystal display panel 2200 and applying power to a light source. It includes a backlight unit 1000 including. In addition, the LCD panel 2200 includes an upper accommodating member 2400 and a lower accommodating member 200 for accommodating the liquid crystal display panel 2200 and the backlight unit 1000.

The liquid crystal display panel 2200 is for displaying an image, and includes a thin film transistor substrate 2220 and a data side and gate side tape carrier package (TCP) 2260a connected to the thin film transistor substrate 2220. 2280a, the data side and gate side printed circuit boards 2260b and 2280b connected to the data side and gate side tape carrier packages 2260a and 2280a, respectively, and the color filter substrate 2240 corresponding to the thin film transistor substrate 2220. And a liquid crystal layer (not shown) injected between the thin film transistor substrate 2220 and the color filter substrate 2240. The display device may further include a polarizer (not shown) formed to correspond to the upper portion of the color filter substrate 2240 and the lower portion of the thin film transistor substrate 2220, respectively.

The color filter substrate 2240 is a substrate in which red (R), green (G), and blue (B) pixels, which are color pixels in which a predetermined color is expressed while light passes, are formed by a thin film process. A common electrode (not shown) made of a transparent conductor such as indium tin oxide (ITO) or indium zinc oxide (IZO), which is a transparent conductive thin film, is formed on an entire surface of the color filter substrate 2240. .

The thin film transistor substrate 2220 is a transparent glass substrate in which a thin film transistor (TFT) and a pixel electrode are formed in a matrix form. The data line is connected to the source terminal of the thin film transistors, and the gate line is connected to the gate terminal. In addition, a pixel electrode (not shown) made of a transparent electrode made of a transparent conductive material is connected to the drain terminal. When an electrical signal is input to the data line and the gate line, each thin film transistor is turned on or turned off to apply an electrical signal necessary for pixel formation to a drain terminal.

The backlight unit 1000 may include a light guide plate 400, a lamp unit 300 provided on a side surface of the light guide plate 400, an optical sheet 500 provided on upper and lower portions of the light guide plate 400, and The light guide plate 400, a lower accommodating member 200 for accommodating the light source and the optical sheet 500, and a wiring 100 for applying power to the lamp unit 300 are included.

The upper accommodating member 2400 is to protect the liquid crystal display panel 2200. The upper accommodating member 2400 may be formed in a rectangular window frame to cover an edge of the liquid crystal display panel 2200.

The lower accommodating member 200 is for accommodating the light guide plate 400, the light source, and the optical sheet 500, and is fastened to the upper accommodating member 2400. The lower accommodating member 200 includes a flat base portion, sidewalls extending from the base portion, and an opening 202 formed in a portion of the base portion and the sidewalls. The opening 202 is formed at one side of the lower housing member 200 close to the area where the lamp 310 is provided, and may be formed by removing a portion of the base portion and a portion of the side wall of the base of the lower housing 200. have. In addition, the opening 202 is divided into a wire alignment unit region 220a in which a wire alignment unit 220 is formed and a wire insertion region 220b which is a space for inserting the wire 100 into the wire alignment unit 220. Can be.

The wiring alignment unit 220 is to fix and align the wiring 100 to the opening 202 formed in the lower accommodating member 200 and to protect the wiring 100 from the sharp edge of the opening 202. As described above, a hook having a “c” shape in which one side is opened and a wiring lead portion 221 is formed may be used. In addition, the wire alignment unit 220 according to the present invention is formed so that the wire lead-in portion 221 faces the wire lead-in area 220b of the opening 202 in a direction different from the opening of the opening 202. Accordingly, since the wire 100 fixed to the wire alignment unit 220 does not protrude to the outside of the opening 202, the wire 100 at the edge of the upper housing member 2400 fastened to the lower housing member 200. This damage can be prevented and the cost of rework due to damage to the wiring 100 can be reduced.

In addition, the wiring lead portion 221 of the wiring alignment portion 220 is formed in a direction different from the entrance of the opening 202 so that the wiring 100 fixed to the wiring alignment portion 220 is bent to the outside of the opening 202. It can be prevented from protruding. In addition, since the wiring 100 does not protrude to the outside of the opening 202 as described above, when the upper accommodating member 2400 is fastened to the lower accommodating member 200, interference of the wiring 100 may be prevented. Can improve.

Although described above with reference to the drawings and embodiments, those skilled in the art can be variously modified and changed within the scope of the invention without departing from the spirit of the invention described in the claims below. I can understand.

As described above, in the present invention, since the wire inlet of the wire alignment unit is formed in a direction different from the inlet of the opening, the wire fixed to the wire alignment unit does not protrude to the outside of the opening, so that the wire is connected to the edge of the upper housing member fastened to the lower housing member. It is possible to provide a backlight unit and a liquid crystal display device having the same, which can prevent the damage and reduce the cost of rework due to wiring damage.

In addition, the present invention can provide a backlight unit and a liquid crystal display device having the same that can prevent the interference of the wiring when fastening the upper housing member and the lower housing member to improve the assembly workability.

Claims (6)

Light source, An accommodating member accommodating the light source and having an opening formed at one side thereof; A wire connected to the light source to supply power to the light source and exposed to the outside through the opening; And a wiring alignment portion formed in the opening to fix the wiring and having a wire entry portion different in direction from the entrance of the opening. The method according to claim 1, The wire alignment portion has a wire lead portion formed on one side, And a portion of the wiring so as to fix the wiring. The method according to claim 2, And the wiring alignment unit is a "c" shape. The method according to claim 1, The wiring alignment portion is formed in a "b" shape, And a backlight unit attached to the opening to form a wiring lead portion. A lower accommodating member accommodating a light source and the light source and an opening formed at one side thereof, and connected to a light source for supplying power to the light source, and formed in the opening to fix the wire exposed to the outside through the opening and the wire. A backlight unit including a lead alignment portion having a wiring alignment portion different in direction from the entrance of the opening portion; And a liquid crystal display panel for receiving light from the backlight unit to display an image. The method according to claim 5, And an upper accommodating member accommodating the liquid crystal display panel and fastened to a lower accommodating member.
KR1020070000626A 2007-01-03 2007-01-03 Backlight unit and liquid crystal display using the same KR20080063969A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020070000626A KR20080063969A (en) 2007-01-03 2007-01-03 Backlight unit and liquid crystal display using the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020070000626A KR20080063969A (en) 2007-01-03 2007-01-03 Backlight unit and liquid crystal display using the same

Publications (1)

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KR20080063969A true KR20080063969A (en) 2008-07-08

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