KR20170090298A - Back light unit for liquid display panel - Google Patents
Back light unit for liquid display panel Download PDFInfo
- Publication number
- KR20170090298A KR20170090298A KR1020160010975A KR20160010975A KR20170090298A KR 20170090298 A KR20170090298 A KR 20170090298A KR 1020160010975 A KR1020160010975 A KR 1020160010975A KR 20160010975 A KR20160010975 A KR 20160010975A KR 20170090298 A KR20170090298 A KR 20170090298A
- Authority
- KR
- South Korea
- Prior art keywords
- light
- guide plate
- light guide
- resin
- liquid crystal
- 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
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- 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
- G02F1/133602—Direct backlight
- G02F1/133605—Direct backlight including specially adapted reflectors
-
- G02F2001/133607—
Landscapes
- 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
Description
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a backlight device applied to a liquid crystal display panel, and a backlight device capable of improving luminance distribution.
Since the liquid crystal material injected between the TFT substrate and the color filter is not a luminescent material that self-luminesces but a light-absorbing material that displays the amount of light coming from the outside and displays on the screen, unlike other display devices, A separate device for irradiating light, that is, a backlight device is necessarily required.
1 is a cross-sectional view showing a configuration of a conventional liquid crystal display device.
The liquid crystal display device 1 includes a
The
The
The optical sheets 17 include a
However, since the optical sheets 17 made of such composite sheets use two or three sheets of fabric in the manufacturing process, the cost of the product due to the cost of the fabric is high, and a process of joining a plurality of sheets is essential. There is a problem that causes a lot of defects in the process.
SUMMARY OF THE INVENTION It is an object of the present invention to provide a light guide plate capable of diffusing light in a light guide plate applied to a backlight unit.
Embodiments of the present invention provide a light source that provides light; A light guide plate for changing a distribution of light provided from the light source; A reflective sheet laminated on a lower surface of the light guide plate and reflecting the light emitted to the lower surface of the light guide plate to the upper surface of the light guide plate; And a prism sheet laminated on the upper surface of the light guide plate and collecting light diffused from the upper surface of the light guide plate and transmitting the condensed light to the liquid crystal display panel. The prism sheet uniformly distributes the light luminance from the light source, And the transparent substrate film is coated on the upper surface.
And a pattern is formed on the upper surface of the transparent base film.
The pattern may be a dot pattern or a prism pattern.
The transparent base film may include any one of a fluorene resin, an epoxy acrylate resin, a modified polyester type oligomer resin, and a monomer resin, a photoinitiator, a UV absorber, and an antioxidant.
Wherein the transparent base film is a film obtained by mixing 0.5 to 7% by weight of a photoinitiator, 0.5 to 2% by weight of an UV absorber, 0.5 to 2% by weight of an antioxidant, and a fluorene resin, an epoxy acrylate resin, or a modified polyester type oligomer resin By weight of a resin of 2 to 80% by weight.
The transparent base film may be characterized by having 0.5 to 7% by weight of a photoinitiator, 0.5 to 2% by weight of an UV absorber, 0.5 to 2% by weight of an antioxidant, and 20 to 80% by weight of a monomer resin.
According to the embodiment of the present invention, since the transparent substrate film attached to the upper surface of the light guide plate is provided, the light emitted from the light guide plate used in the backlight device of the liquid crystal display device can be diffused evenly and brightness can be improved without the diffusion sheet.
1 is a cross-sectional view showing a configuration of a conventional liquid crystal display device.
2 is a cross-sectional view showing a configuration of a liquid crystal display device according to an embodiment of the present invention.
3 is a view showing a state in which a dot-shaped pattern is formed on an upper surface of a transparent substrate film according to an embodiment of the present invention.
4 is a view showing a state in which a prism-shaped pattern is formed on the upper surface of a transparent substrate film according to an embodiment of the present invention.
5 is a view showing an optical path of a light guide plate with a transparent substrate film on which a prism pattern is formed according to an embodiment of the present invention.
BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and how to achieve them, will be apparent from the following detailed description of embodiments thereof taken in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the exemplary embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concept of the invention to those skilled in the art. And the present invention is only defined by the scope of the claims. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.
2 is a cross-sectional view showing a configuration of a liquid crystal display device according to an embodiment of the present invention.
Hereinafter, a liquid crystal display device will be taken as an example of a display device, and a backlight device will be described by taking an edge type light source as an example, but it may be applied to a vertical light source as well.
The liquid crystal display device includes a
The
The
The
A light guide plate (LGP) 130 changes the distribution of light provided from the light source. Accordingly, the
The
The
The
Meanwhile, a conventional backlight unit (BLU) has a separate diffusion sheet between the
In this case, however, it becomes an obstacle to the slim of the backlight device. Thus, the present invention coating a transparent resin material for diffusion function on the upper surface of the
To this end, the present invention coats the
It is preferable that a pattern is formed on the upper surface of the
A dot or prism pattern is formed on the upper surface of the
As described above, the
That is, the
The
The
The
On the other hand, as a result of the experiment, it was found that the weight ratio of the resins contained in the
That is, the respective weight ratio of the resins contained in the
Each weight ratio of the resins contained in the
The weight ratio of each of the resins contained in the
On the other hand, when an aliphatic or aromatic monomer resin other than a fluorene resin, an epoxy acrylate resin or a modified polyester type oligomer resin is used, it is preferable that the aliphatic and aromatic monomer resin is contained in an amount of 20 to 80% by weight.
Therefore, each weight ratio of the resins contained in the
The embodiments of the present invention described above are selected and presented in order to facilitate the understanding of those skilled in the art from a variety of possible examples. The technical idea of the present invention is not necessarily limited to or limited to these embodiments Various changes, modifications, and other equivalent embodiments are possible without departing from the spirit of the present invention.
100: backlight device 110: light source
120: reflective sheet 130: light guide plate
131: transparent substrate film
Claims (6)
A light guide plate for changing a distribution of light provided from the light source;
A reflective sheet laminated on a lower surface of the light guide plate and reflecting the light emitted to the lower surface of the light guide plate to the upper surface of the light guide plate; And
And a prism sheet stacked on the upper surface of the light guide plate to condense the light diffused from the upper surface of the light guide plate and transmit the condensed light to the liquid crystal display panel,
Wherein the transparent substrate film is coated on the upper surface to uniformly distribute the luminance of the light from the light source and improve vertical incidence.
Wherein a pattern is formed on an upper surface of the transparent base film.
Wherein the backlight device has a dot-like pattern or a prism-like pattern.
A backlight device for a liquid crystal display panel comprising a resin selected from a fluorene resin, an epoxy acrylate resin, a modified polyester type oligomer resin and a monomer resin, a photoinitiator, a UV absorber and an antioxidant.
0.5 to 2% by weight of a photoinitiator, 0.5 to 2% by weight of an UV absorber, 0.5 to 2% by weight of an antioxidant, and 2 to 80% by weight of a fluorene resin, an epoxy acrylate resin or a modified polyester- % Of the thickness of the liquid crystal layer.
, 0.5 to 7 wt% of a photoinitiator, 0.5 to 2 wt% of an UV absorber, 0.5 to 2 wt% of an antioxidant, and 20 to 80 wt% of a monomer resin.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020160010975A KR20170090298A (en) | 2016-01-28 | 2016-01-28 | Back light unit for liquid display panel |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020160010975A KR20170090298A (en) | 2016-01-28 | 2016-01-28 | Back light unit for liquid display panel |
Publications (1)
Publication Number | Publication Date |
---|---|
KR20170090298A true KR20170090298A (en) | 2017-08-07 |
Family
ID=59653853
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020160010975A KR20170090298A (en) | 2016-01-28 | 2016-01-28 | Back light unit for liquid display panel |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR20170090298A (en) |
-
2016
- 2016-01-28 KR KR1020160010975A patent/KR20170090298A/en not_active Application Discontinuation
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