KR101808842B1 - Light guide plate holder and backlight unit having the same - Google Patents
Light guide plate holder and backlight unit having the same Download PDFInfo
- 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
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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
-
- 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—
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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
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
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
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
Since the
2, the light guide plate holder 7 is in contact with the
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
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.
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
Specifically, the
The
The
The
The
The light
The light
When the
The
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
The light
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)
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.
And a reflective layer is formed on an inner surface of the space portion between the upper horizontal portion and the lower horizontal portion.
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 |
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KR20170090543A KR20170090543A (en) | 2017-08-08 |
KR101808842B1 true KR101808842B1 (en) | 2017-12-14 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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KR1020160010578A KR101808842B1 (en) | 2016-01-28 | 2016-01-28 | Light guide plate holder and backlight unit having the same |
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Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101577335B1 (en) | 2014-07-09 | 2015-12-15 | 희성전자 주식회사 | Assembling Structure of Backlight unit |
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2016
- 2016-01-28 KR KR1020160010578A patent/KR101808842B1/en active IP Right Grant
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101577335B1 (en) | 2014-07-09 | 2015-12-15 | 희성전자 주식회사 | Assembling Structure of Backlight unit |
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KR20170090543A (en) | 2017-08-08 |
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