KR20080095065A - Led back-light unit and liquid crystal display device with the same - Google Patents

Led back-light unit and liquid crystal display device with the same Download PDF

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Publication number
KR20080095065A
KR20080095065A KR1020070039392A KR20070039392A KR20080095065A KR 20080095065 A KR20080095065 A KR 20080095065A KR 1020070039392 A KR1020070039392 A KR 1020070039392A KR 20070039392 A KR20070039392 A KR 20070039392A KR 20080095065 A KR20080095065 A KR 20080095065A
Authority
KR
South Korea
Prior art keywords
backlight unit
light
light source
led
led backlight
Prior art date
Application number
KR1020070039392A
Other languages
Korean (ko)
Inventor
안응수
Original Assignee
삼성전기주식회사
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 삼성전기주식회사 filed Critical 삼성전기주식회사
Priority to KR1020070039392A priority Critical patent/KR20080095065A/en
Publication of KR20080095065A publication Critical patent/KR20080095065A/en

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Classifications

    • 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
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • 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
    • 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
    • G02F1/133611—Direct backlight including means for improving the brightness uniformity
    • 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
    • G02F1/133621—Illuminating devices providing coloured light

Abstract

The present invention relates to an LED backlight unit and a liquid crystal display device having the same.

The present invention is a hollow housing as an outer frame; A metal core printed circuit board (MCPCB) mounted at a lower end of the housing and provided with a plurality of LED light source members on an upper surface thereof and provided with a plurality of driving members for driving the LED light source members; A diffusion plate provided in the housing to convert light incident from the light source member into white light and to emit the light; And an LED backlight unit on the optical plate of the LED backlight unit, the LED backlight unit configured to include an optical plate provided on the diffusion plate and condensing white light transmitted through the diffusion plate in a viewing angle range. The present invention relates to a liquid crystal display device which is characterized by incident white light.

According to the present invention, it is possible to provide a slim LED backlight unit and a liquid crystal display device having the same, which are slim and can obtain uniformity of luminance without a conventional thick bottom cover.

Description

LED backlight unit and liquid crystal display device having same {LED Back-light unit and liquid crystal display device with the same}

1 is a perspective view showing a conventional LED backlight unit.

2 is a cross-sectional view for explaining an LED backlight unit and a liquid crystal display according to an exemplary embodiment of the present invention.

3 is a cross-sectional view for describing an LED backlight unit and a liquid crystal display according to another exemplary embodiment of the present invention.

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

100, 200: liquid crystal display 110, 210: housing

120, 220: MCPCB 130, 230: light source member

140 and 240: driving members 150 and 250: diffusion plate

160 and 260: optical plates 170 and 270: liquid crystal panel

The present invention relates to an LED backlight unit and a liquid crystal display device having the same, and more particularly, to an LED backlight unit and a liquid crystal display device having the same, which can obtain a slim and uniform emission luminance.

In general, a liquid crystal display such as a liquid crystal display (LCD) requires a light source to visually display an image on the back of the liquid crystal display, and uses a backlight unit as the light source. The backlight unit mainly uses a cold cathode fluorescent lamp (CCFL), and transmits the light generated from the cold cathode fluorescent lamp through a light-gaid panel (LGP) to form a liquid crystal display under the liquid crystal display. Will be projected on.

The backlight unit of the liquid crystal display device includes a light guide plate for transmitting light generated from a fluorescent lamp as a light source, a reflector plate disposed on a bottom surface of the light guide plate to reflect light transmitted from the light guide plate to a liquid crystal display, a diffuser plate disposed on an upper surface of the light guide plate, and a prism A plate, a protective plate, and the like are laminated and assembled on the mold frame in a top down manner, and at the bottom thereof, a metal back cover is disposed. In addition, an inverter for controlling light intensity variably by receiving AC power is provided.

However, the cold cathode fluorescent lamp (CCFL) contains mercury at 2.5 to 3.5 mg per lamp, which is subject to environmental regulations, and there is a risk of current leakage because wires are required for connection with the inverter. However, it has a disadvantage that it is not applied for TV in terms of lifespan with 10,000 to 50,000 hours lifespan. In addition, it is weak in vibration and shock in terms of reliability, and in terms of color reproducibility, it also has a disadvantage in that visibility is much lower than that of existing CRTs.

Therefore, as an alternative to satisfy the high reliability conditions that can overcome the disadvantages of such cold cathode fluorescent lamps (CCFL) LED was used as the backlight source of the LCD.

1 is a perspective view showing a conventional LED backlight unit.

As shown in FIG. 1, the conventional LED backlight unit includes a LED array 21 formed of a plurality of LEDs for generating light, and a PCB (Printed Circuit Board) formed to light and have an LED array 21 on the front thereof. ), A reflective sheet 22 formed in an area excluding the portion where the LED of the LED array 21 is formed on the front surface of the PCB 26, and an upper portion of the LED array 21 to provide nonuniformity of light generated from the LED array 21. The prism sheet 24, which is provided on the diffusion sheet 23, the diffusion sheet 23 to relax, and raises the brightness by collecting light in the up / down / left / right directions, and the prism sheet 24 And a protector 25 for protecting and increasing the viewing angle.

Meanwhile, the conventional LED backlight unit configured as described above is further provided with a fixing bottom cover 27, and an LED driving IC chip for driving the LED array 21 on the lower surface of the fixing bottom cover 27 (not shown). And a connector (not shown) and the like, and each LED of the LED array 21 generates red light, green light, and blue light as a point light source.

The PCB 26 includes a circuit for controlling the LED array 21, and is formed to protrude from a circuit included on the surface of a predetermined region of the PCB 26 to transmit and support a control signal to each LED. An electrode portion (not shown) is provided. As a result, the PCB 26 controls the light emission of the LED through the control circuit and the electrode portion.

The diffusion sheet 23 is disposed at a predetermined distance from the LED array 21 so that light from the LED array 21 has a uniform distribution, and the reflective sheet 22 is formed on the front surface of the PCB 26. As a result, the light reflected from the diffused sheet 23 and reflected toward the PCB 26 is reflected again.

As a result, the light transmitted through the diffusion sheet 23 in the light generated from the LED array 21 diffuses onto the liquid crystal panel (not shown), and does not pass through the diffusion sheet 23 and is incident to the PCB 26. Is reflected back by the reflective sheet 22 and proceeds to the diffusion sheet 23.

However, the liquid crystal display device having the LED backlight unit as described above is increasing in accordance with the trend of slimming, and the demand for slim backlight unit without the bottom cover 27 is increasing.

An object of the present invention is to provide an LED backlight unit that can obtain a slim and uniform light emission luminance without a conventional fixing bottom cover.

Another object of the present invention is to provide a liquid crystal display device having an LED backlight unit that can achieve a slim and uniform emission luminance.

The present invention for achieving the above object is a hollow housing as an outer frame; A metal core printed circuit board (MCPCB) mounted at a lower end of the housing and provided with a plurality of LED light source members on an upper surface thereof and provided with a plurality of driving members for driving the LED light source members; A diffusion plate provided in the housing to convert light incident from the light source member into white light and to emit the light; And an LED backlight unit on the optical plate of the LED backlight unit, the LED backlight unit including an optical plate provided on the diffusion plate and condensing white light transmitted through the diffusion plate in a viewing angle range to emit light. The present invention relates to a liquid crystal display device comprising white light incident on a panel.

In the present invention, the MCPCB is provided with a reflective sheet between the LED light source member and the MCPCB with respect to the surface provided with the LED light source member.

In the present invention, the MCPCB is mounted to the lower end of the housing using a coupling member or an adhesive.

In the present invention, the MCPCB is characterized in that both ends are engaged with the coupling step provided deeper than the thickness of the MCPCB at the lower end of the housing is mounted using an adhesive or a coupling member.

In the present invention, the diffusion plate is provided with a plurality of scattering patterns on the bottom surface to scatter the light incident from the light source member, irregular in the form of a layer or inside the phosphor for converting the scattered light into white light It is characterized by containing in a distributed form.

In the present invention, the optical plate is characterized in that the MLAF (Micro Lans Array Film) provided with a plurality of hemispherical lenses on the surface from which the white light.

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

2 is a cross-sectional view for describing an LED backlight unit and a liquid crystal display according to an exemplary embodiment of the present invention.

As shown in FIG. 2, the LED backlight unit and the liquid crystal display device 100 including the LED backlight unit according to an exemplary embodiment of the present invention include a housing 110 and a housing 110 that are provided in a hollow form as an external frame as an LED backlight unit. MCPCB (Metal Core Printed Circuit Board) 120 including a plurality of light source members 130 including upper LEDs at a lower end thereof and a lower driving member 140 for driving each light source member 130. ), A diffuser plate 150 for converting the light incident from the plurality of light source members 130 into white light and outputting the light, and the white light provided on the diffuser plate 150 and transmitted through the diffuser plate 150 in a viewing angle range. The liquid crystal display device 100 may include an optical plate 160 for emitting light, and the LCD panel 100 may be further provided on the optical plate 160 for the LED backlight unit.

The MCPCB 120 includes a plurality of light source members 130 including an LED on the upper side and a driving member 140 such as a driving IC chip for driving each light source member 130 on the lower side. 130 is a printed circuit board having a reflective sheet having a high reflectance on a surface having a surface, and as shown in FIG. 2, a housing formed by a coupling member 121 such as a bolt and a rivet at a lower end of the housing 110. It may be coupled to 110 or mounted using an adhesive.

As shown in FIG. 2, the light source member 130 is a light source member having a structure in which packages including LEDs are mounted on the upper side of the MCPCB 120, respectively, and a plurality of light source members are mounted at predetermined intervals on the upper side of the MCPCB 120. It may be provided to inject light to 150.

The diffuser plate 150 is a plate-shaped member made of a plastic material such as transparent epoxy or silicon that scatters light incident from the light source member 130 and emits light into surface light. The diffuser plate 150 scatters light incident from the light source member 130. A plurality of scattering patterns (not shown) are provided on the lower surface, and phosphors for converting light incident from the light source member 130 into white light are provided in the form of a layer or irregularly distributed therein.

The optical plate 160 is a member of a MLAF (Micro Lens Array Film) that condenses and emits white light transmitted through the diffusion plate 150 in a viewing angle range, for example, on a surface that derives white light as shown in FIG. 2. A plurality of lenses having a lens pitch of about 10 mu m, a lens thickness of 25 mu m to 50 mu m, and a lens height of about 3 mu m are arranged at predetermined intervals. Here, the optical plate 160 material of MLAF is a lens material having a light transmittance and a light condensing function, and may be formed using, for example, polycarbonate (PC), silicon epoxy, or the like. It can also be formed to have a lens effect due to the refractive index dispersion by.

In the LED backlight unit according to the exemplary embodiment of the present invention configured as described above, the liquid crystal panel 170 is further provided on the optical plate 160 to be manufactured as the liquid crystal display device 100 and the upper and lower sides of the MCPCB 120. Each of the LED light source member 130 and the driving member 140 is provided to support.

Accordingly, the MCPCB 120 may be supported by the MCPCB 120 without the conventional thick bottom cover 27, and the MCPCB 120 may be removed without a wire connecting the driver IC chip and the connector. Through the electrical connection is made, there is no need for a stud (stud) for providing a drive IC chip in the prior art can manufacture a slim LED backlight unit, a slim liquid crystal display device using such a slim LED backlight unit (100) Can be implemented.

In addition, since the white light transmitted through the diffusion plate 150 is condensed by the MLAF optical plate 160 in the viewing angle range, light is emitted, thereby preventing luminance from being lowered due to a decrease in light transmission efficiency. It becomes possible.

Hereinafter, an LED backlight unit and a liquid crystal display according to another exemplary embodiment of the present invention will be described with reference to FIG. 3.

3 is a cross-sectional view for describing an LED backlight unit and a liquid crystal display according to another exemplary embodiment of the present invention.

As shown in FIG. 3, the LED backlight unit and the liquid crystal display device 200 having the same according to an exemplary embodiment of the present invention include a housing 210 having an external frame as an LED backlight unit and a lower end of the housing 210. MCPCB having a plurality of light source members 230 configured to include an LED coupled to the coupling step 221 of the upper side and a lower driving member 240 connected to each of the light source members 230 to drive them. (Metal Core Printed Circuit Board: 220), a diffusion plate 250 for converting the light incident from the plurality of light source members 230 to white light and outputting it, and a diffusion plate 250 provided on the diffusion plate 250 to transmit And an optical plate 260 for condensing and emitting one white light at a viewing angle range, and further comprising a liquid crystal panel 270 on the optical plate 260 for the LED backlight unit. Can be configured.

The MCPCB 220 includes a plurality of light source members 230 including LEDs on the upper side and a plurality of driving members 240 for driving the respective light source members 230 on the lower side and supports the light source members 130. A printed circuit board having a reflective sheet having a high reflectance on a surface having a surface, and as shown in FIG. 3, a coupling step provided with a depth longer than the thickness of the MCPCB 220 at the lower end of the housing 210. 221 is engaged at both ends and can be mounted using adhesive. Here, the MCPCB 220 may be coupled to both ends of the lower end of the housing 210 by a coupling member such as a bolt or a rivet.

As illustrated in FIG. 3, the light source member 230 is a light source member having a structure in which a package including an LED is mounted on an upper side of the MCPCB 220, respectively, and a plurality of light source members are mounted at predetermined intervals on the upper side of the MCPCB 220. The light may be provided to inject light into the 250.

The diffusion plate 250 is a plate-shaped member made of a plastic material such as transparent epoxy or silicon that scatters the light incident from the light source member 230 and emits the light as white light. The diffusion plate 250 has a lower surface to scatter the light incident from the light source member 230. It is provided with a plurality of scattering patterns (not shown), and the phosphor for converting the light incident from the light source member 130 to white light is provided in the form of a layer or irregularly distributed therein.

The optical plate 260 is a member of a MLAF (Micro Lens Array Film) for condensing and emitting white light transmitted through the diffusion plate 250 in a viewing angle range. For example, a lens pitch of about 10 μm on a surface from which white light is derived, A plurality of lenses having a lens thickness of 25 μm to 50 μm and a lens height of about 3 μm are formed by being arranged at predetermined intervals. The optical plate 260 of MLAF is a lens material having a light transmitting property and a light condensing function, and may be formed using, for example, polycarbonate (PC), silicon epoxy, or the like and diffuse impurities in a glass substrate in consideration of thermal expansion. It may be formed to have a lens effect due to refractive index dispersion by impurities.

In the LED backlight unit according to another embodiment of the present invention configured as described above, a liquid crystal panel 270 is further provided on the optical plate 260 to be manufactured as the liquid crystal display device 200, and both ends of the MCPCB 220 are provided. Is coupled to the coupling step 221 of the lower end of the housing 210 to support a plurality of LED light source member 230 and the driving member 240 in the upper and lower, respectively, without the conventional thick bottom cover 27 The MCPCB 220 may be used to perform a supporting function.

Therefore, the electrical connection is made through the MCPCB 220 without the need for a wire connecting the driver IC chip and the connector in the past, and there is no need for a stud for providing the driver IC chip in the related art. Thus, a slim LED backlight unit may be manufactured, and a slim liquid crystal display device 200 using the slim LED backlight unit may be implemented.

In addition, since the white light transmitted through the diffusion plate 250 is condensed by the MLAF optical plate 260 in the viewing angle range, light emission is prevented, and luminance uniformity is prevented by lowering light transmission efficiency. It becomes possible.

Although the technical spirit of the present invention has been described in detail according to the above-described preferred embodiment, it should be noted that the above-described embodiments are for the purpose of description and not of limitation.

In addition, those skilled in the art will understand that various implementations are possible within the scope of the technical idea of the present invention.

As described above, the present invention can provide a slim LED backlight unit using a MCPCB and a liquid crystal display device having the same without a thick bottom cover of the related art.

In addition, the present invention condenses and emits white light transmitted through the diffusion plate by the MLAF optical plate in the viewing angle range, and thus, a slim type which can obtain luminance uniformity by preventing luminance decrease due to a decrease in light transmission efficiency. An LED backlight unit and a liquid crystal display device having the same may be provided.

Claims (8)

A hollow housing with an outer frame; And MCPCB (Metal Core Printed Circuit Board) which is mounted on the lower end of the housing and provided with a plurality of LED light source members on the upper surface and a plurality of driving members for driving the LED light source member LED backlight unit configured to include. The method of claim 1, And the MCPCB includes a reflective sheet between the LED light source member and the MCPCB with respect to a surface having the LED light source member. The method of claim 1, A diffusion plate provided in the housing to convert light incident from the light source member into white light and to emit the light; And An optical plate provided on the diffusion plate to condense and emit white light transmitted through the diffusion plate in a viewing angle range LED backlight unit characterized in that it is provided further comprising. The method of claim 1, The MCPCB is mounted to the lower end of the housing using a bonding member or adhesive, LED backlight unit, characterized in that. The method of claim 1, The MCPCB is LED backlight unit, characterized in that the both ends are engaged with the coupling step provided deeper than the thickness of the MCPCB at the lower end of the housing using an adhesive or a coupling member. The method of claim 3, wherein The diffuser plate has a plurality of scattering patterns on the lower surface to scatter the light incident from the light source member, and the LED backlight unit, characterized in that provided with a phosphor for converting the scattered light into white light therein. The method of claim 3, wherein The optical plate is an LED backlight unit, characterized in that the MLAF (Micro Lans Array Film) provided with a plurality of hemispherical lenses on the surface for emitting white light. A hollow housing with an outer frame; A metal core printed circuit board (MCPCB) mounted at a lower end of the housing and provided with a plurality of LED light source members on an upper surface and a plurality of driving members for driving the LED light source members; A diffusion plate provided in the housing to convert light incident from the light source member into white light and to emit the light; And An LED backlight unit provided on the diffuser plate and including an optical plate configured to condense and emit white light transmitted through the diffuser plate in a viewing angle range, And a white light incident to the liquid crystal panel including a liquid crystal panel on the optical plate.
KR1020070039392A 2007-04-23 2007-04-23 Led back-light unit and liquid crystal display device with the same KR20080095065A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130201425A1 (en) * 2010-12-16 2013-08-08 Panasonic Corporation Backlight device and liquid crystal display apparatus
US9791737B2 (en) 2014-07-14 2017-10-17 Samsung Display Co., Ltd. Display device
CN110043830A (en) * 2019-04-11 2019-07-23 广东美的厨房电器制造有限公司 Lighting device and micro-wave oven
CN111856815A (en) * 2020-08-10 2020-10-30 深圳市宝明科技股份有限公司 Backlight module and display device
KR20230016892A (en) 2021-07-27 2023-02-03 주식회사 신영아이템산업 Potable Hydrogen Bubble Generator

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130201425A1 (en) * 2010-12-16 2013-08-08 Panasonic Corporation Backlight device and liquid crystal display apparatus
US9791737B2 (en) 2014-07-14 2017-10-17 Samsung Display Co., Ltd. Display device
CN110043830A (en) * 2019-04-11 2019-07-23 广东美的厨房电器制造有限公司 Lighting device and micro-wave oven
CN111856815A (en) * 2020-08-10 2020-10-30 深圳市宝明科技股份有限公司 Backlight module and display device
CN111856815B (en) * 2020-08-10 2021-07-02 深圳市宝明科技股份有限公司 Backlight module and display device
KR20230016892A (en) 2021-07-27 2023-02-03 주식회사 신영아이템산업 Potable Hydrogen Bubble Generator

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