KR101808842B1 - Light guide plate holder and backlight unit having the same - Google Patents

Light guide plate holder and backlight unit having the same Download PDF

Info

Publication number
KR101808842B1
KR101808842B1 KR1020160010578A KR20160010578A KR101808842B1 KR 101808842 B1 KR101808842 B1 KR 101808842B1 KR 1020160010578 A KR1020160010578 A KR 1020160010578A KR 20160010578 A KR20160010578 A KR 20160010578A KR 101808842 B1 KR101808842 B1 KR 101808842B1
Authority
KR
South Korea
Prior art keywords
guide plate
light guide
light
vertical portion
cover bottom
Prior art date
Application number
KR1020160010578A
Other languages
Korean (ko)
Other versions
KR20170090543A (en
Inventor
장영호
Original Assignee
희성전자 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 희성전자 주식회사 filed Critical 희성전자 주식회사
Priority to KR1020160010578A priority Critical patent/KR101808842B1/en
Publication of KR20170090543A publication Critical patent/KR20170090543A/en
Application granted granted Critical
Publication of KR101808842B1 publication Critical patent/KR101808842B1/en

Links

Images

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
    • 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
    • G02F1/133524—Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides
    • 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
    • G02F2001/133325—

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light guide plate holder having a function of blocking light leaked to a light receiving surface of a light guide plate, and a backlight device having the same. A light guide plate that is seated in a receiving space of the cover bottom; A light source module disposed at one side of the light guide plate in the accommodating space of the cover bottom; And the upper end of the vertical portion and the upper and lower horizontal portions of the vertical portion extend inward, and the end portion of the light guide plate of the region where the light source module is not disposed is inserted into the space between the upper and lower horizontal portions, A light guide plate holder; An optical sheet laminated on the light guide plate; And a guide panel fastened along an edge of the cover bottom at an upper side of the optical sheet.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light guide plate holder and a backlight unit having the same,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a backlight device, and more particularly, to a backlight device having a light guide plate holder having a function of blocking light leaking to a light-receiving surface of a light guide plate, and a backlight device having the same.

Unlike other display devices, a liquid crystal display (LCD) device, which is a flat display device, can not emit light itself, and therefore an external light source is necessarily required to realize an image . Therefore, the LCD further includes a backlight unit as an external light source in addition to the liquid crystal panel, and the backlight unit uniformly supplies the high brightness light to the liquid crystal panel, thereby realizing a high-quality image.

As described above, the backlight device refers to a surface light source unit installed on the back surface of a liquid crystal panel in order to realize an image of a display device such as an LCD, and a light emitting diode (LED) It is mainly used. The backlight device is classified into a direct lighting type or an edge lighting type backlight device depending on the position of the LED light source. In the direct type backlight device, a point light source is disposed under the diffusion plate, In a side-type backlight device, a point light source is disposed on the side of the light guide plate and indirectly illuminates the light through the light guide plate and the optical sheet. In recent years, a side-type backlight device which is advantageous for slimming and exhibits uniform optical characteristics is mainly used as a planar light source of an LCD.

FIG. 1 is an exploded perspective view showing a conventional side-type backlight device, and FIG. 2 is a cross-sectional view illustrating a carrying-in light side area, which is a main part of the backlight device of FIG. 1, taken along the line I-I in FIG.

1, the side-type backlight device includes a reflective sheet 2 and a light-guiding plate 3 mounted on a square-shaped cover bottom 1, and a light source module (not shown) is mounted on at least one side of the light- 4) are disposed. In the backlight device, the optical sheet 5 is laminated on the upper surface of the light guide plate 3, and the guide panel 6 is fastened to the cover bottom 1 on the upper side.

Generally, when the backlight device is driven, much heat is generated in the light source module 4, and such heat can be transmitted to the light guide plate 3. Also, the light emitted from the light source module 4 travels while repeating total internal reflection within the light guide plate 3, and heat is generated inside the light guide plate 3 in this process.

Since the light guide plate 3 is made of resin such as PMMA, the heat generated by the light source module 4 or the light generated in the light guide plate 3 inflates the light guide plate 3. Since the thermal expansion of the light guide plate 3 changes the optical characteristics of the backlight device, the side light guide backlight device is further provided with a light guide plate holder 7 for preventing the light guide plate 3 from flowing due to thermal expansion. That is, the light guide plate holder 7 is fastened to the cover bottom 1 in the area of the light receiving surface 3b of the light guide plate 3, and is provided at a predetermined interval along the side of the light guide plate 3 Module is disposed and light is incident on the light guide plate, and the receiving light surface region refers to the remaining side surface of the light guide plate where no light is incident).

2, the light guide plate holder 7 is in contact with the mounting surface 7a on which the end portion of the light guide plate 3 can be placed and the light-receiving surface 3b of the light guide plate 3, A contact surface 7b for preventing flow is provided. The light guide plate holder 7 is preferably made of an elastic material such as silicon in order to correspond to the thermal expansion of the light guide plate 3. Further, since the plurality of light guide plate holders 7 are composed of individual blocks, hook-shaped fastening protrusions 7c are formed on the back surface of the light guide plate holder 7 so as to be fastened to the cover bottom 1. As described above, the light guide plate holder 7 having the fastening protrusions 7c is required to form a hook on the back surface, which is disadvantageous in that the manufacturing process is complicated. In addition, since the conventional backlight device requires each individual light guide plate holder 7 to be fastened to the cover bottom 1, it takes a lot of time to fasten the light guide plate holder 7, thereby deteriorating the productivity.

Meanwhile, in the side-type backlight device, light emitted from the LED is incident on the light guide plate while passing through the light-incident surface, and is converted into a surface light source while being totally reflected along the inside of the light guide plate. At this time, most of the light totally reflected in the light guide plate is converted to the surface light source and is emitted to the upper surface, but a part of light leaks to the receiving light surface and disappears. In order to prevent this, a side reflector 3 'is provided on the light-incoming surface 3b of the light guide plate 3 in order to shield the leaked light. The side reflector 3 'is made of a thin sheet having a high reflectance and adheres to the light-incoming surface 3b of the light-guide plate 3 or a material having a high light reflectance is applied to the light-incoming surface 3b of the light- ≪ / RTI >

The side reflector formed on the light receiving surface of the light guide plate shields light leaking to the side of the light guide plate to improve the light conversion efficiency and brightness. However, since a separate light reflection member is attached or coated on the side surface of the light guide plate, There is a problem that the manufacturing process becomes complicated. Further, in recent years, the light guide plate is formed to be thinner like a sheet in accordance with the slimming tendency of the backlight device, and this step of forming the side reflector becomes more difficult.

Korean Registered Patent No. 10-1246237 (Registered on March 13, 2015, Fixed Structure of Light Guide Plate of Backlight Device)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a light guide plate holder and a backlight device having the same which can be easily manufactured without forming a separate structure for fastening to a cover bottom.

Another object of the present invention is to provide a light guide plate holder and a backlight device having the light guide plate holder, which can be effectively prevented from leaking light without being attached to the light guide plate by a side light reflector.

According to an aspect of the present invention, there is provided a light guide plate holder comprising: a vertical portion having a predetermined height and formed in a longitudinal direction of a light guide plate receiving light surface; An upper horizontal portion extending from the upper end of the vertical portion to one side; And a lower horizontal part extending from the lower end of the vertical part to the same side as the horizontal part, and fastened to the light guide plate so that the end part of the light guide plate is inserted into the space part between the upper horizontal part and the lower horizontal part.

In this case, the vertical portion forms a hollow portion inside, and is divided into an outer vertical portion and an inner vertical portion, and a reflective layer is formed on the inner surface of the space portion.

According to another aspect of the present invention, there is provided a backlight device including: a cover bottom for forming a storage space therein; A light guide plate that is seated in a receiving space of the cover bottom; A light source module disposed at one side of the light guide plate in the accommodating space of the cover bottom; And the upper end of the vertical portion and the upper and lower horizontal portions of the vertical portion extend inward, and the end portion of the light guide plate of the region where the light source module is not disposed is inserted into the space between the upper and lower horizontal portions, A light guide plate holder; An optical sheet laminated on the light guide plate; And a guide panel fastened along an edge of the cover bottom at an upper side of the optical sheet.

Here, the light guide plate holder is made of a silicon material, and the upper and lower horizontal portions are fastened to elastically press the upper and lower surfaces of the light guide plate.

In addition, the guide panel is fastened to the cover bottom while elastically pressing the upper surface of the light guide plate holder.

The light guide plate holder of the present invention has a cross section of 'C' shape to facilitate manufacture of the light guide plate holder. The light guide plate holder is fastened so as to insert the light receiving side end portion of the light guide plate, thereby simplifying the assembling process of the backlight device.

In addition, according to the present invention, the light guide plate holder is fastened along the longitudinal direction of the light guide plate carry-in light surface, so that light leaked from the light guide plate carry-in light side is effectively blocked to improve the light utilization efficiency.

1 is an exploded perspective view showing a side-view backlight device according to a conventional technique,
Fig. 2 is an engaging cross-sectional view of a receiving optical surface area, which is a main part of Fig. 1,
3 is an exploded perspective view showing a side-view backlight device according to an embodiment of the present invention,
4 is an engaging cross-sectional view showing the importing light-surface area of the backlight device which is the main part of Fig. 3, and Fig.
5 is an assembled cross-sectional view illustrating a fastening structure of a light guide plate holder according to another embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 3 is an exploded perspective view illustrating a side-type backlight device according to an embodiment of the present invention. FIG. 4 is an engaging cross-sectional view illustrating a light-receiving surface area of the backlight device, Respectively.

As shown in these figures, the backlight device according to the embodiment of the present invention includes a cover bottom 110 forming a storage space therein, a reflective sheet 120 sequentially placed in a receiving space of the cover bottom, a light guide plate 130 An optical sheet 150, a light source module 140 disposed on at least one side of the light guide plate, a light guide plate holder 170 that is fastened to the light guide plate end portion of the light receiving surface area where the light source module is not disposed, And a guide panel 160 to be fastened thereto.

Specifically, the cover bottom 110 houses the optical members such as the reflection sheet 120, the light guide plate 130, the optical sheet 150, and the light source module 140, . The cover bottom 110 is formed with a sidewall extending upward from the edge of the square plate on the plate, and a storage space is formed therein with the top opened.

The reflective sheet 120 reflects the light emitted downward from the light guide plate 130 to the inside of the light guide plate 130 to improve the brightness of the backlight unit. The reflective sheet 120 may be made of a metal sheet having excellent light reflectance or may be formed of a sheet having a surface coated with a light reflecting material such as Ag.

The light guide plate 130 is a light diverting device that converts light from a plurality of point light sources incident from the light source module 140 into total light through a total internal reflection and provides the light to the liquid crystal panel. The light guide plate 130 is made of a transparent acrylic resin having a predetermined refractive index and may be made of resin such as polymethylmethacrylate (PMMA), poly styrene (PS), metastyrene (MS), or polycarbonate have.

The optical sheet 150 condenses and diffuses the light emitted from the light guide plate 130, thereby improving the uniformity of brightness and brightness of the backlight unit. The optical sheet 150 may be composed of a plurality of light control sheets including a prism sheet and a diffusion sheet.

The light source module 140 may be a light source of a backlight unit that provides light to the inside of the light guide plate 130, and may be an LED array in which a plurality of LEDs are mounted on a substrate. The light source module 140 is disposed on one side or opposite sides of the storage space of the cover bottom 110 and is disposed such that the light emitting surface of the LED faces the light incident surface of the light guide plate 130. At this time, one side or both sides of the light guide plate on which the light source module 140 is disposed forms the light incidence surface, and the other side where the light source module 140 is not disposed forms the light incidence surface.

The light guide plate holder 170 is configured to prevent the flow of light due to the thermal expansion of the light guide plate 130 and to block the light leaking to the receiving light surface to improve the light efficiency. The light source module 140 is disposed on the rectangular light guide plate And functions as a side reflector that is coupled to an end of the light receiving surface 130b and blocks leakage of light to the light receiving surface 130b of the light guide plate 130. [ The light guide plate holder 170 is formed into a frame having a length corresponding to the longitudinal direction of the light guide plate receiving light surface 130b in a cross section. That is, the light guide plate holder 170 includes a vertical portion 171 having a predetermined height and being elongated in the longitudinal direction, an upper horizontal portion 172 extending inward from the upper end of the vertical portion 171, And a lower horizontal portion 173 extending inwardly from the lower end of the upper horizontal portion 172 in parallel with the upper horizontal portion 172. [

The light guide plate holder 170 having such a configuration is fastened so that the end of the light receiving surface 130b of the light guide plate 130 is inserted into the space formed by the vertical portion 171, the upper horizontal portion 172 and the lower horizontal portion 173 . At this time, the light guide plate holder 170 is fastened so that a predetermined gap is formed between the light entrance surface 130b and the inner surface of the vertical portion 171 so that thermal expansion of the light guide plate 130 is not disturbed. The light guide plate holder 170 is made of an elastic material such as silicon and the interval between the upper horizontal portion 172 and the lower horizontal portion 173 is equal to or slightly smaller than the thickness of the light guide plate 130 . When the light receiving surface 130b of the light guide plate 130 is inserted into the space portion, the upper horizontal portion 172 and the lower horizontal portion 173 elastically press the upper and lower surfaces of the light guide plate 130, 130 so that the light leakage phenomenon does not occur between the light guide plate 130 and the upper horizontal portion 172 or the lower horizontal portion 173.

When the guide panel 160 is fastened to the cover bottom 110 at the upper portion of the light guide plate holder 170 of the present invention, the upper horizontal portion 172 and the lower portion 172 are separated by the guide panel 160 and the cover bottom 110, And the horizontal portion 173 are elastically pressed. Thus, even if the fixing means is not provided, the fixing member can be stably fixed in the cover bottom 110.

The guide panel 160 is configured to stably fix various optical members stored in the cover bottom 110 by being fastened along the edges of the cover bottom 110. The guide panel 160 is formed of a rectangular frame having a central portion opened to form a window, and the cross section has a shape of 'A' connecting the horizontal portion and the vertical portion. The guide panel 160 is vertically coupled to the side wall of the cover bottom 110, and the horizontal portion elastically presses and fixes the LGP holder 170.

5 is an assembled cross-sectional view illustrating a fastening structure of a light guide plate holder according to another embodiment of the present invention.

The light guide plate holder 170 according to another embodiment of the present invention is configured such that the hollow portion 174 is formed inside the vertical portion 171 and the vertical portion 171 is formed by the outer vertical portion 171a and the inner vertical portion 171b Respectively. The hollow portion 174 provides a space in which the inner vertical portion 171b is pushed outward and the inner vertical portion 171b is easily pushed by the light guide plate carry-in light surface 130b when the light guide plate 130 thermally expands, The thermal expansion of the light guide plate 130 is not disturbed even if the light receiving surface 130b comes into contact with the inner surface of the inner vertical portion 171b.

The light guide plate holder 170 has a reflective layer 175 formed on the inner surface of the vertical portion 171. The reflective layer 175 reflects light leaking to the light guide plate carry-in light surface 130b into the light guide plate 130 to prevent leakage and improve the brightness of the backlight device. The reflective layer 175 may be formed by applying a material having a high reflectivity such as Ag to the inner surface of the vertical portion. The light guide plate holder 170 itself is made of a material having a high reflectance. However, since the reflective layer 175 is formed on the inner surface of the vertical portion 171 as described above, a more excellent reflection function can be exhibited.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.

110: cover bottom 120: reflective sheet
130: light guide plate 140: light source module
150: optical sheet 160: guide panel
170: light guide plate holder 171:
172: upper horizontal portion 173: lower horizontal portion
174: hollow part 175: reflective layer

Claims (7)

delete delete delete A light source module disposed in a space for accommodating the cover bottom at one side of the light guide plate, a light source module disposed at a side of the light guide plate in an area where the light source module is not disposed, An optical sheet laminated on the light guide plate and a guide panel fastened along an edge of the cover bottom at an upper side of the optical sheet,
The light guide plate holder includes:
An elastic member having a vertical portion formed in a longitudinal direction of the light guide plate carrying light surface at a predetermined height, an upper horizontal portion extending from the upper end of the vertical portion to the inside of the light guide plate, and a lower horizontal portion extending from the lower end of the vertical portion to the inside of the light guide plate Lt; / RTI >
Wherein the upper horizontal portion and the lower horizontal portion are coupled to an end of the light guide plate to elastically press the upper and lower surfaces of the edge of the light guide plate to block light leaking to the receiving light surface of the light guide plate,
The vertical portion is divided into an outer vertical portion and an inner vertical portion, and a hollow portion is formed between the outer vertical portion and the inner vertical portion.
The guide panel and the cover bottom may be formed,
Wherein the light guide plate holder is fastened to the upper horizontal portion and the lower horizontal portion of the light guide plate holder so as to elastically press the upper and lower horizontal portions, respectively. The light guide plate holder according to claim 4,
And a reflective layer is formed on an inner surface of the space portion between the upper horizontal portion and the lower horizontal portion.

delete delete
KR1020160010578A 2016-01-28 2016-01-28 Light guide plate holder and backlight unit having the same KR101808842B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020160010578A KR101808842B1 (en) 2016-01-28 2016-01-28 Light guide plate holder and backlight unit having the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020160010578A KR101808842B1 (en) 2016-01-28 2016-01-28 Light guide plate holder and backlight unit having the same

Publications (2)

Publication Number Publication Date
KR20170090543A KR20170090543A (en) 2017-08-08
KR101808842B1 true KR101808842B1 (en) 2017-12-14

Family

ID=59652852

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020160010578A KR101808842B1 (en) 2016-01-28 2016-01-28 Light guide plate holder and backlight unit having the same

Country Status (1)

Country Link
KR (1) KR101808842B1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101577335B1 (en) 2014-07-09 2015-12-15 희성전자 주식회사 Assembling Structure of Backlight unit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101577335B1 (en) 2014-07-09 2015-12-15 희성전자 주식회사 Assembling Structure of Backlight unit

Also Published As

Publication number Publication date
KR20170090543A (en) 2017-08-08

Similar Documents

Publication Publication Date Title
US9535207B2 (en) Backlight unit for liquid crystal display device
TW201525587A (en) Edge-type backlighting module and light guide plate thereof
JP4645314B2 (en) Light guide plate, edge light type surface light source and liquid crystal display device using the same
KR101835116B1 (en) Light guide plate holder and Planar light source device the same
KR101651888B1 (en) Backlight unit
KR101562360B1 (en) Backlight unit and Assembly Method of the Same
KR20130053061A (en) Light guiding plate, backlight unit and liquid crystal display device using the sames
KR101662237B1 (en) Back Light Unit
KR101808842B1 (en) Light guide plate holder and backlight unit having the same
KR20170099011A (en) Liquid crystal display apparatus
KR101721663B1 (en) Guide panel assembly and assembling method of backlight unit using the same
KR101749714B1 (en) Display apparatus
KR101212798B1 (en) Light guide plate and manufacturing method thereof
WO2011099330A1 (en) Backlight device, liquid crystal display device and television receiver
KR20170088459A (en) Liquid crystal display apparatus
KR101548650B1 (en) Assembling Structure of Backlight unit
KR101810124B1 (en) Assembly structure for Backlight unit
KR102415255B1 (en) Backlight unit
KR101491465B1 (en) Light Converting Module with Cover Buttom
KR101601633B1 (en) Backlight unit
KR20140108764A (en) Backlight Unit
KR101779930B1 (en) Light guide plate and Planar light source device the same
KR20160049588A (en) Backlight Unit
KR102443151B1 (en) Light guide plate and backlight unit having the same
KR20220007794A (en) Guide block and Backlight unit with the same

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E90F Notification of reason for final refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant