WO2008082115A1 - Backlight unit and display device having the same - Google Patents

Backlight unit and display device having the same Download PDF

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Publication number
WO2008082115A1
WO2008082115A1 PCT/KR2007/006745 KR2007006745W WO2008082115A1 WO 2008082115 A1 WO2008082115 A1 WO 2008082115A1 KR 2007006745 W KR2007006745 W KR 2007006745W WO 2008082115 A1 WO2008082115 A1 WO 2008082115A1
Authority
WO
WIPO (PCT)
Prior art keywords
case
led
backlight unit
led module
reflective sheet
Prior art date
Application number
PCT/KR2007/006745
Other languages
French (fr)
Inventor
Deung Kwan Kim
Original Assignee
Lg Innotek Co., Ltd
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 Lg Innotek Co., Ltd filed Critical Lg Innotek Co., Ltd
Publication of WO2008082115A1 publication Critical patent/WO2008082115A1/en

Links

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
    • G02F1/133608—Direct backlight including particular frames or supporting means

Definitions

  • the embodiment relates to a backlight unit and a display device having the same.
  • FIG. 1 is a schematic view showing a part of a conventional backlight unit and FIG.
  • FIG. 2 is a view showing a section of I-I' in FIG. 1.
  • a conventional backlight unit comprises a case 10, an
  • the LED module 20 that provides light comprises a PCB (printed circuit board) 21, an LED 23 formed on the PCB 21 and a mold part 25 formed on the LED 23.
  • PCB printed circuit board
  • the fixing part 30 fixes the LED module 20 to the case 10.
  • the case 10 may be a cover bottom.
  • the fixing part 30 includes a screw.
  • the backlight unit having the structure as described above comprises a plurality of LED modules 20.
  • defects of the LED modules 20 may be detected during an inspection process for product release.
  • the case 10 must be disassembled and the fixing parts 30 must be separated from the LED modules 20 in order to replace the LED modules 20 with new ones.
  • the fixing parts 30 must be separated from the LED modules 20 as shown in FIGS. 1 and 2.
  • replacement of the LED modules 20 may be frequently required due to defects detected when the backlight unit is used by a user.
  • a reflective sheet 40 formed with an opening for exposing the
  • the LED 23 is formed on the LED module 20.
  • the reflective sheet 40 reflects light, which is emitted from the LED 23, in the upward direction.
  • the fixing part 30 fixes the reflective sheet 40 and the LED module 20 to the case
  • the fixing part 30 includes a screw.
  • the fixing part 30 has a reflectivity of about 60% to 70%.
  • the embodiment provides a backlight unit, which can facilitate replacement of parts and prevent a reflective sheet from being deformed during the manufacturing process thereof, and a display device having the same.
  • a backlight unit comprising: a case comprising a plurality of openings; and an LED module comprising an LED under the case such that the LED is accommodated into the opening of the case.
  • a display device comprising: a backlight unit including a case comprising a plurality of openings, and an LED module comprising an LED under the case such that the LED is accommodated into the opening of the case; and a display unit displaying an image.
  • FIG. 1 is a schematic view showing a part of a conventional backlight unit
  • FIG. 2 is a view showing a section of I-I' in FIG. 1;
  • FIG. 3 is a sectional view showing a coupling structure of a reflective sheet in a conventional backlight unit
  • FIG. 4 is a schematic view showing a part of a backlight unit according to an embodiment
  • FIG. 5 is a view showing a section of II- II' in FIG. 4.
  • FIG. 6 is a schematic view showing a backlight unit according to another embodiment. Mode for the Invention
  • FIG. 4 is a schematic view showing a part of a backlight unit according to an em- bodiment and FIG. 5 is a view showing a section of II-II' in FIG. 4.
  • the backlight unit comprises a case 110, an LED module 120, a fixing part 30 and a reflective sheet 140.
  • the LED module 120 that provides light comprises a PCB 121, an LED 123 formed on the PCB 121 and a mold part 125 formed on the LED 123.
  • the LED 123 may be mounted on the PCB 121.
  • the LED module 120 may be formed as the plural number, and at least one LED module 120 comprises a plurality of LEDs. And the LED module 120 may be formed as the plural number, and each LED module 120 comprises a single LED.
  • the case 110 has a plurality of openings 150.
  • the case 110 may be formed of SUS material.
  • the LED module 120 is provided with the LED 123.
  • the LED module 120 is located on the bottom surface of the case 110 such that the LED 123 can be inserted into the opening 150 of the case 110.
  • the reflective sheet 140 has a plurality of openings 150 for exposing the LED 123.
  • the reflective sheet 140 reflects light, which is emitted from the LED 123, in the upward direction.
  • the fixing part 130 fixes the LED module 120 to the case 110.
  • the case 110 may be a cover bottom.
  • the fixing part 130 may be formed as a screw, a nail.
  • the fixing part 130 is designed such that the LED module 120 can be fixed to the bottom of the case 110 by means of the fixing part 130.
  • the fixing part 130 can be inserted into the case 110 or can extend by passing through the case 110.
  • the coupling position of the fixing part 130 may be varied according to the design of the backlight unit.
  • the LED module 120 that provides light can be located out of the case 110.
  • the LED module 120 can be exchanged through a simple process of separating the fixing part 130 from the case 110.
  • the LED module 120 can be easily separated from the case 110 and then exchanged.
  • the reflective sheet 140 can be integrally formed with the case 110 through coating on the upper surface of the case 110. Further, the reflective sheet 140 can also be formed on the case 110 as an additional member. When the reflective sheet 140 is formed as the additional member as described above, the reflective sheet 140 can be fixed to the upper surface of the case 110 by using an adhesive member.
  • the backlight unit according to the embodiment includes a guide pin.
  • the guide pin fixes the reflective sheet 140 to the case 110.
  • the guide pin can support an optical sheet, such as a diffusion sheet, which is to be located on the guide pin.
  • the guide pin has a reflectivity equal to or similar to that of the reflective sheet 140.
  • the guide pin can be inserted into the case 110 or can extend by passing through the case 110.
  • the reflective sheet 140 According to the backlight unit of the embodiment as described above, it is not necessary to fix the reflective sheet 140 to the case 110 by using the fixing part 130 such as a screw. Accordingly, during the manufacturing process thereof, the reflective sheet 140 can be prevented from being crushed or wrinkled due to fastening of the fixing part 130.
  • the backlight unit having the structure as described above can have a plurality of
  • LED modules 120 The number of the LED modules 120 may be varied according to examples to which the backlight unit is applied, and the alignment thereof may be varied.
  • the backlight unit according to the embodiment can be applied to various display devices requiring a light source.
  • the backlight unit can be applied to a liquid crystal device provided with a liquid crystal panel.
  • the liquid crystal device can display an image on the display unit of the liquid crystal panel by using light provided from the backlight unit.
  • FIG. 6 is a schematic view showing a backlight unit according to another embodiment.
  • the backlight unit according to the embodiment comprises a case
  • an LED module 220 an LED module 220, a fixing part 230 and a reflective sheet 240.
  • the LED module 220 that provides light comprises a PCB 221, an LED 223 formed on the PCB 221 and a mold part 225 formed on the LED 223.
  • the LED 223 can be mounted on the PCB 221.
  • the LED module 220 may be formed as the plural number, and at least one LED module 220 comprises a plurality of LEDs. And the LED module 220 may be formed as the plural number, and each LED module 220 comprises a single LED.
  • the case 210 has a plurality of openings 250.
  • the case 210 may be formed of SUS material.
  • the LED module 220 is provided with the LED 223.
  • the LED module 220 is located on the bottom surface of the case 210 such that the LED 223 can be inserted into the opening 250 of the case 210.
  • the reflective sheet 240 has a plurality of openings 250 for exposing the LED 223.
  • the reflective sheet 240 reflects light, which is emitted from the LED 223, in the upward direction.
  • the case 210 has a concave section at the lower portion thereof and the LED module 220 can be inserted into the concave section of the case 210.
  • the fixing part 230 fixes the LED module 220 to the outer surface of the case 210.
  • the case 210 may be a cover bottom.
  • the fixing part 130 may be formed as a screw, a nail.
  • the fixing part 230 is designed such that the LED module 220 can be fixed to the bottom of the case 210 by using the fixing part 230.
  • the fixing part 230 can be inserted into the case 210 or can extend by passing through the case 210.
  • the coupling position of the fixing part 230 may be varied according to the design of the backlight unit.
  • the LED module 220 that provides light can be located out of the case 210.
  • the LED module 220 can be exchanged through a simple process of separating the fixing part 230 from the case 210.
  • the LED module 220 can be easily separated from the case 210 and then exchanged.
  • the reflective sheet 240 can be integrally formed with the case 210 through coating on the upper surface of the case 210. Further, the reflective sheet 240 can also be formed on the case 210 as an additional member. When the reflective sheet 240 is formed as the additional member as described above, the reflective sheet 240 can be fixed to the upper surface of the case 210 by using an adhesive member. The reflective sheet 240 can be formed on the entire inner surface of the case 210.
  • the backlight unit according to the embodiment includes a guide pin.
  • the guide pin fixes the reflective sheet 240 to the case 210.
  • the guide pin can support an optical sheet, such as a diffusion sheet, which is to be located on the guide pin.
  • the guide pin has a reflectivity equal to or similar to that of the reflective sheet 240.
  • the guide pin can be inserted into the case 210 or can extend by passing through the case 210.
  • the reflective sheet 240 According to the backlight unit of the embodiment as described above, it is not necessary to fix the reflective sheet 240 to the case 210 by using the fixing part 230 such as a screw. Accordingly, during the manufacturing process thereof, the reflective sheet 240 can be prevented from being crushed or wrinkled due to fastening of the fixing part 230.
  • the backlight unit having the structure as described above can have a plurality of
  • the number of the LED modules 220 may be varied according to examples to which the backlight unit is applied, and the alignment thereof may be varied.
  • the backlight unit according to the embodiment can be applied to various display devices requiring a light source.
  • the backlight unit can be applied to a liquid crystal device provided with a liquid crystal panel.
  • the liquid crystal device can display an image on the display unit of the liquid crystal panel by using light provided from the backlight unit.
  • example embodiment means that a particular feature, structure, or characteristic described in connection with the embodiment is comprised in at least one embodiment of the invention.
  • the appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the purview of one skilled in the art to effect such feature, structure, or characteristic in connection with other ones of the embodiments.

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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)
  • Planar Illumination Modules (AREA)

Abstract

Disclosed is a backlight unit. The backlight unit comprises a case comprising a plurality of openings and an LED module comprising an LED under the case such that the LED is accommodated into the opening of the case.

Description

Description
BACKLIGHT UNIT AND DISPLAY DEVICE HAVING THE
SAME
Technical Field
[1] The embodiment relates to a backlight unit and a display device having the same.
Background Art
[2] FIG. 1 is a schematic view showing a part of a conventional backlight unit and FIG.
2 is a view showing a section of I-I' in FIG. 1.
[3] As shown in FIGS. 1 and 2, a conventional backlight unit comprises a case 10, an
LED module 20 and a fixing part 30.
[4] The LED module 20 that provides light comprises a PCB (printed circuit board) 21, an LED 23 formed on the PCB 21 and a mold part 25 formed on the LED 23.
[5] The fixing part 30 fixes the LED module 20 to the case 10. The case 10 may be a cover bottom. For example, the fixing part 30 includes a screw. The backlight unit having the structure as described above comprises a plurality of LED modules 20.
[6] Meanwhile, defects of the LED modules 20 may be detected during an inspection process for product release. When the defects of the LED modules 20 are detected as described above, the case 10 must be disassembled and the fixing parts 30 must be separated from the LED modules 20 in order to replace the LED modules 20 with new ones. However, in order to disassemble the case 10 and separate the LED modules 20 from the case 10, it is inconvenient in that the fixing parts 30 must be separated from the LED modules 20 as shown in FIGS. 1 and 2. In addition, after the produce release, replacement of the LED modules 20 may be frequently required due to defects detected when the backlight unit is used by a user.
[7] As shown in FIG. 3, a reflective sheet 40 formed with an opening for exposing the
LED 23 is formed on the LED module 20. The reflective sheet 40 reflects light, which is emitted from the LED 23, in the upward direction.
[8] The fixing part 30 fixes the reflective sheet 40 and the LED module 20 to the case
10. An upper portion of the fixing part 30 is exposed on the reflective sheet 40. For example, the fixing part 30 includes a screw. In general, the fixing part 30 has a reflectivity of about 60% to 70%. When the reflective sheet 40 is fixed to the case 10 by using the fixing part 30 such as a screw, the reflective sheet 40 may be crushed or wrinkled.
[9] Thus, a backlight unit, in which the LED module 20 can be easily separated from the case 10 and then replaced with new one, is required. Further, a scheme for preventing the reflective sheet 40 from being deformed during the manufacturing process of a backlight unit is also required. Disclosure of Invention
Technical Problem
[10] The embodiment provides a backlight unit, which can facilitate replacement of parts and prevent a reflective sheet from being deformed during the manufacturing process thereof, and a display device having the same.
Technical Solution [11] A backlight unit according to an embodiment comprising: a case comprising a plurality of openings; and an LED module comprising an LED under the case such that the LED is accommodated into the opening of the case. [12] A display device according to an embodiment comprising: a backlight unit including a case comprising a plurality of openings, and an LED module comprising an LED under the case such that the LED is accommodated into the opening of the case; and a display unit displaying an image.
Advantageous Effects
[13] According to the backlight unit and the display device having the same of the embodiment, parts can be easily exchanged and a reflective sheet can be prevented from being deformed during the manufacturing process thereof. Brief Description of the Drawings
[14] FIG. 1 is a schematic view showing a part of a conventional backlight unit;
[15] FIG. 2 is a view showing a section of I-I' in FIG. 1;
[16] FIG. 3 is a sectional view showing a coupling structure of a reflective sheet in a conventional backlight unit;
[17] FIG. 4 is a schematic view showing a part of a backlight unit according to an embodiment;
[18] FIG. 5 is a view showing a section of II- II' in FIG. 4; and
[19] FIG. 6 is a schematic view showing a backlight unit according to another embodiment. Mode for the Invention
[20] In the description of an embodiment, it will be understood that, when a layer (or film), a region, a pattern, or a structure is referred to as being "on" or "under" another substrate, another layer (or film), another region, another pad, or another pattern, it can be "directly" or "indirectly" on the other substrate, layer (or film), region, pad, or pattern, or one or more intervening layers may also be present.
[21] Hereinafter, an embodiment will be described with reference to the accompanying drawings.
[22] FIG. 4 is a schematic view showing a part of a backlight unit according to an em- bodiment and FIG. 5 is a view showing a section of II-II' in FIG. 4.
[23] As shown in FIGS. 1 and 2, the backlight unit according to the embodiment comprises a case 110, an LED module 120, a fixing part 30 and a reflective sheet 140.
[24] The LED module 120 that provides light comprises a PCB 121, an LED 123 formed on the PCB 121 and a mold part 125 formed on the LED 123. The LED 123 may be mounted on the PCB 121.
[25] The LED module 120 may be formed as the plural number, and at least one LED module 120 comprises a plurality of LEDs. And the LED module 120 may be formed as the plural number, and each LED module 120 comprises a single LED.
[26] The case 110 has a plurality of openings 150. For example, the case 110 may be formed of SUS material. The LED module 120 is provided with the LED 123. The LED module 120 is located on the bottom surface of the case 110 such that the LED 123 can be inserted into the opening 150 of the case 110. Further, the reflective sheet 140 has a plurality of openings 150 for exposing the LED 123. The reflective sheet 140 reflects light, which is emitted from the LED 123, in the upward direction.
[27] The fixing part 130 fixes the LED module 120 to the case 110. The case 110 may be a cover bottom. For example, the fixing part 130 may be formed as a screw, a nail.
[28] The fixing part 130 is designed such that the LED module 120 can be fixed to the bottom of the case 110 by means of the fixing part 130. The fixing part 130 can be inserted into the case 110 or can extend by passing through the case 110. The coupling position of the fixing part 130 may be varied according to the design of the backlight unit.
[29] According to the backlight unit of the embodiment, the LED module 120 that provides light can be located out of the case 110. Thus, when the LED module 120 must be exchanged, disassembling the case 110 is not necessary. Further, since the LED module 120 is located out of the case 110, the LED module 120 can be exchanged through a simple process of separating the fixing part 130 from the case 110.
[30] According to the backlight unit of the embodiment as described above, the LED module 120 can be easily separated from the case 110 and then exchanged.
[31] According to the backlight unit of the embodiment, the reflective sheet 140 can be integrally formed with the case 110 through coating on the upper surface of the case 110. Further, the reflective sheet 140 can also be formed on the case 110 as an additional member. When the reflective sheet 140 is formed as the additional member as described above, the reflective sheet 140 can be fixed to the upper surface of the case 110 by using an adhesive member.
[32] The backlight unit according to the embodiment includes a guide pin. The guide pin fixes the reflective sheet 140 to the case 110. The guide pin can support an optical sheet, such as a diffusion sheet, which is to be located on the guide pin. The guide pin has a reflectivity equal to or similar to that of the reflective sheet 140. The guide pin can be inserted into the case 110 or can extend by passing through the case 110.
[33] According to the backlight unit of the embodiment as described above, it is not necessary to fix the reflective sheet 140 to the case 110 by using the fixing part 130 such as a screw. Accordingly, during the manufacturing process thereof, the reflective sheet 140 can be prevented from being crushed or wrinkled due to fastening of the fixing part 130.
[34] The backlight unit having the structure as described above can have a plurality of
LED modules 120. The number of the LED modules 120 may be varied according to examples to which the backlight unit is applied, and the alignment thereof may be varied.
[35] The backlight unit according to the embodiment can be applied to various display devices requiring a light source. For example, the backlight unit can be applied to a liquid crystal device provided with a liquid crystal panel. The liquid crystal device can display an image on the display unit of the liquid crystal panel by using light provided from the backlight unit.
[36] FIG. 6 is a schematic view showing a backlight unit according to another embodiment.
[37] As shown in FIG. 6, the backlight unit according to the embodiment comprises a case
210, an LED module 220, a fixing part 230 and a reflective sheet 240.
[38] The LED module 220 that provides light comprises a PCB 221, an LED 223 formed on the PCB 221 and a mold part 225 formed on the LED 223. The LED 223 can be mounted on the PCB 221.
[39] The LED module 220 may be formed as the plural number, and at least one LED module 220 comprises a plurality of LEDs. And the LED module 220 may be formed as the plural number, and each LED module 220 comprises a single LED.
[40] The case 210 has a plurality of openings 250. For example, the case 210 may be formed of SUS material. The LED module 220 is provided with the LED 223. The LED module 220 is located on the bottom surface of the case 210 such that the LED 223 can be inserted into the opening 250 of the case 210. Further, the reflective sheet 240 has a plurality of openings 250 for exposing the LED 223. The reflective sheet 240 reflects light, which is emitted from the LED 223, in the upward direction.
[41] Further, the case 210 has a concave section at the lower portion thereof and the LED module 220 can be inserted into the concave section of the case 210.
[42] The fixing part 230 fixes the LED module 220 to the outer surface of the case 210.
The case 210 may be a cover bottom. For example, the fixing part 130 may be formed as a screw, a nail. [43] The fixing part 230 is designed such that the LED module 220 can be fixed to the bottom of the case 210 by using the fixing part 230. The fixing part 230 can be inserted into the case 210 or can extend by passing through the case 210. The coupling position of the fixing part 230 may be varied according to the design of the backlight unit.
[44] According to the backlight unit of the embodiment, the LED module 220 that provides light can be located out of the case 210. Thus, when the LED module 220 must be exchanged, disassembling the case 210 is not necessary. Further, since the LED module 220 is located out of the case 210, the LED module 220 can be exchanged through a simple process of separating the fixing part 230 from the case 210.
[45] According to the backlight unit of the embodiment as described above, the LED module 220 can be easily separated from the case 210 and then exchanged.
[46] According to the backlight unit of the embodiment, the reflective sheet 240 can be integrally formed with the case 210 through coating on the upper surface of the case 210. Further, the reflective sheet 240 can also be formed on the case 210 as an additional member. When the reflective sheet 240 is formed as the additional member as described above, the reflective sheet 240 can be fixed to the upper surface of the case 210 by using an adhesive member. The reflective sheet 240 can be formed on the entire inner surface of the case 210.
[47] The backlight unit according to the embodiment includes a guide pin. The guide pin fixes the reflective sheet 240 to the case 210. The guide pin can support an optical sheet, such as a diffusion sheet, which is to be located on the guide pin. The guide pin has a reflectivity equal to or similar to that of the reflective sheet 240. The guide pin can be inserted into the case 210 or can extend by passing through the case 210.
[48] According to the backlight unit of the embodiment as described above, it is not necessary to fix the reflective sheet 240 to the case 210 by using the fixing part 230 such as a screw. Accordingly, during the manufacturing process thereof, the reflective sheet 240 can be prevented from being crushed or wrinkled due to fastening of the fixing part 230.
[49] The backlight unit having the structure as described above can have a plurality of
LED modules 220. The number of the LED modules 220 may be varied according to examples to which the backlight unit is applied, and the alignment thereof may be varied.
[50] The backlight unit according to the embodiment can be applied to various display devices requiring a light source. For example, the backlight unit can be applied to a liquid crystal device provided with a liquid crystal panel. The liquid crystal device can display an image on the display unit of the liquid crystal panel by using light provided from the backlight unit. [51] Any reference in this specification to "one embodiment", "an embodiment",
"example embodiment", etc., means that a particular feature, structure, or characteristic described in connection with the embodiment is comprised in at least one embodiment of the invention. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the purview of one skilled in the art to effect such feature, structure, or characteristic in connection with other ones of the embodiments.
[52] Although embodiments have been described with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure. More particularly, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, alternative uses will also be apparent to those skilled in the art. Industrial Applicability
[53] According to the backlight unit and the display device having the same of the embodiment, parts can be easily exchanged and a reflective sheet can be prevented from being deformed during the manufacturing process thereof.

Claims

Claims
[ 1 ] A backlight unit comprising: a case comprising a plurality of openings; and an LED module comprising an LED under the case such that the LED is accommodated into the opening of the case. [2] The backlight unit as claimed in claim 1, wherein the LED module comprises a printed circuit board, the LED on the printed circuit board, and a mold part on the LED. [3] The backlight unit as claimed in claim 1, comprising a reflective sheet comprising an opening for exposing the LED on the case. [4] The backlight unit as claimed in claim 3, wherein the reflective sheet is integrally formed with the case through coating on the upper surface of the case. [5] The backlight unit as claimed in claim 3, wherein the reflective sheet is formed with a member separated from the case. [6] The backlight unit as claimed in claim 3, wherein the reflective sheet reflects light, which is emitted from the LED, in an upward direction. [7] The backlight unit as claimed in claim 1, wherein the case is formed of SUS material. [8] The backlight unit as claimed in claim 1, wherein the case comprises a concave section at a lower portion thereof and the LED module is accommodated into the concave section. [9] The backlight unit as claimed in claim 1, comprising a fixing part fixing the LED module under the case. [10] The backlight unit as claimed in claim 1, wherein the LED module is formed as the plural number, and at least one LED module comprises a plurality of LEDs. [11] A display device comprising: a backlight unit including a case comprising a plurality of openings, and an LED module comprising an LED under the case such that the LED is accommodated into the opening of the case; and a display unit displaying an image. [12] The display device claimed in claim 11, wherein the display unit comprises a liquid crystal panel. [13] The display device claimed in claim 11, wherein the LED module comprises a printed circuit board, the LED on the printed circuit board, and a mold part on the LED. [14] The display device claimed in claim 11, comprising a reflective sheet comprising an opening for exposing the LED on the case. [15] The display device claimed in claim 14, wherein the reflective sheet is integrally formed with the case through coating on the upper surface of the case. [16] The display device claimed in claim 14, wherein the reflective sheet is formed with a member separated from the case. [17] The display device claimed in claim 11, wherein the LED module is formed as the plural number, and at least one LED module comprises a plurality of LEDs. [18] The display device claimed in claim 11, wherein the case is formed of SUS material. [19] The display device claimed in claim 11, wherein the case has a concave section at a lower portion thereof and the LED module is accommodated into the concave section. [20] The display device claimed in claim 11, comprising a fixing part fixing the LED module under the case.
PCT/KR2007/006745 2006-12-29 2007-12-21 Backlight unit and display device having the same WO2008082115A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR20060138966 2006-12-29
KR10-2006-0138966 2006-12-29

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WO2008082115A1 true WO2008082115A1 (en) 2008-07-10

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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