KR20080075976A - Backlight unit for liquid crystal display device - Google Patents
Backlight unit for liquid crystal display device Download PDFInfo
- Publication number
- KR20080075976A KR20080075976A KR1020070015265A KR20070015265A KR20080075976A KR 20080075976 A KR20080075976 A KR 20080075976A KR 1020070015265 A KR1020070015265 A KR 1020070015265A KR 20070015265 A KR20070015265 A KR 20070015265A KR 20080075976 A KR20080075976 A KR 20080075976A
- Authority
- KR
- South Korea
- Prior art keywords
- lamp
- liquid crystal
- fluorescent lamps
- backlight unit
- lamp guide
- Prior art date
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V19/00—Fastening of light sources or lamp holders
- F21V19/0075—Fastening of light sources or lamp holders of tubular light sources, e.g. ring-shaped fluorescent light sources
- F21V19/008—Fastening of light sources or lamp holders of tubular light sources, e.g. ring-shaped fluorescent light sources of straight tubular light sources, e.g. straight fluorescent tubes, soffit lamps
- F21V19/009—Fastening of light sources or lamp holders of tubular light sources, e.g. ring-shaped fluorescent light sources of straight tubular light sources, e.g. straight fluorescent tubes, soffit lamps the support means engaging the vessel of the source
-
- 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
- G02F1/133604—Direct backlight with lamps
-
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133608—Direct backlight including particular frames or supporting means
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133611—Direct backlight including means for improving the brightness uniformity
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)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Planar Illumination Modules (AREA)
Abstract
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device. More specifically, in a direct backlight unit of a liquid crystal display device, a lamp is capable of reducing luminance unevenness due to screening to a minimum while directly holding a fluorescent lamp that emits light. A lamp guide including a holder.
A feature of the present invention is that the first and second lamp holders of the lamp guide that supports a plurality of fluorescent lamps and prevents sagging of the optical sheet, etc. are sequentially arranged side by side at intervals of one pitch. Of the third fluorescent lamps, only the first and the third fluorescent lamps are respectively fixed.
As a result, more uniform and higher luminance can be realized by minimizing luminance non-uniformity caused by obscuring the fluorescent lamp.
In addition, by controlling the distance between the optical sheet and the fluorescent lamp within a desired range to realize a uniform surface light source, it is possible to greatly reduce the shaking or breakage of the fluorescent lamp due to external impact.
Description
1 is a cross-sectional view of a liquid crystal display device using a general direct type backlight unit.
2 is a partial cross-sectional view of a backlight unit including a general lamp guide.
3 is a plan view illustrating a luminance distribution according to a light emitting state of a general backlight unit;
4 is an exploded perspective view of a liquid crystal display module according to the present invention.
5a and 5b are respectively a perspective view and a front view of the lamp guide according to the present invention.
6 is a plan view showing a luminance distribution according to the light emission state of the backlight unit according to the present invention.
<Description of the symbols for the main parts of the drawings>
124: fluorescent lamp 160: lamp guide
162: support 164: fixed end
166a, 166b: first and second lampholders
168 support part
BACKGROUND OF THE
In line with the recent information age, the display field has also been rapidly developed, and as a flat panel display device (FPD) having advantages of thinning, light weight, and low power consumption, a liquid crystal display device: LCD, Plasma Display Panel (PDP), Electroluminescence Display (ELD), Field Emission Display (FED), etc. : It is rapidly replacing CRT.
Among them, LCDs are excellent in moving image display and are most actively used in notebooks, monitors, TVs, etc. due to high contrast ratio. The LCDs are devices that do not have their own light emitting elements. It requires a light source. As a result, a backlight unit having a fluorescent lamp is provided on the rear surface to irradiate light toward the front of the liquid crystal panel, thereby realizing an image of identifiable luminance. In this case, a cold cathode fluorescent lamp (CCFL) or an external electrode fluorescent lamp (EEFL) is used as a light source for generating light.
Meanwhile, a general backlight unit is classified into an edge type and a direct type according to the arrangement of fluorescent lamps. The edge type has a structure in which one or a pair of lamps is disposed at one side of the light guide plate. Alternatively, two or two pairs of lamps may be disposed on both sides of the light guide plate, and the direct type may have a structure in which several lamps are disposed below the optical sheet.
In this case, the edge type has an advantage of being easy to manufacture while disadvantageous to a large screen, but the direct type has a relatively advantageous advantage for a large liquid crystal display with respect to high uniformity of light.
1 is a cross-sectional view of a liquid crystal display using a general direct type backlight unit.
As shown, a general liquid crystal display module includes a
The
The
The most important role of the
In particular, considering that the size of the
Accordingly, by preventing the deflection of the
2 is a view schematically illustrating a structure of a
Therefore, when using the
However, such a
That is, FIG. 3 shows luminance distribution according to the light emission state of the
The present invention is to solve the above problems, by realizing a uniform surface light source by preventing the deflection phenomenon of the optical sheet and at the same time to minimize the light loss due to the obstruction of the fluorescent lamp can achieve a more uniform and high brightness It is an object to provide a lamp guide.
In order to achieve the object as described above, the present invention is a reflection plate; First to third fluorescent lamps sequentially arranged side by side at a pitch interval on the reflecting plate; And a lamp guide configured with first and second lamp holders for preventing the flow of the first to third fluorescent lamps, wherein the first and second lamp holders of the lamp guide are configured at intervals of two pitches. Thus, the backlight unit for the liquid crystal display device is characterized in that the first and third fluorescent lamps are respectively fixed.
The lamp guide is positioned on one side of the first and third fluorescent lamps, further comprising the fourth fluorescent lamp and the second lamp guide, wherein the second and fourth fluorescent lamps are the second lamp It is characterized by being fixed through the guide.
In addition, the second lamp guide is located on the other side of the second and fourth fluorescent lamps, characterized in that not located on a straight line in the arrangement direction of the lamp guide and the first to fourth fluorescent lamps, The lamp guide is characterized in that it comprises a support, a support and a fixed end.
At this time, the support portion is characterized in that it protrudes higher than the lamp holder, the first and second lamp holder is characterized in that the ring shape of one direction is opened.
In addition, the lamp guide is characterized in that the synthetic resin material of white or silver, and further comprises a diffuser plate and a plurality of optical sheets located on the fluorescent lamp, the fixing end of the lamp guide penetrates through the reflective sheet It is characterized by.
In addition, the present invention and the liquid crystal panel; A plurality of optical sheets provided below the liquid crystal panel; A plurality of optical sheets provided on the lower part of the liquid crystal panel, a reflecting plate provided below the liquid crystal panel, first to third fluorescent lamps sequentially arranged side by side at a pitch interval on the reflecting plate, and a first A backlight unit including a lamp guide configured with a second lamp holder; A support main covering an edge of the liquid crystal panel and the backlight unit; A cover bottom adhered to the rear surface of the reflector; And a top cover covering a front edge of the liquid crystal panel, wherein the lamp guide is configured such that the first and second lamp holders are pitched at a pitch of two pitches to fix the first and third fluorescent lamps. A liquid crystal display module is provided.
At this time, the lamp guide is characterized in that it comprises a support, a support and a fixed end, the fixed end is characterized in that the penetrating through the reflecting plate and the cover bottom.
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
4 is an exploded perspective view schematically illustrating a liquid crystal display module according to an exemplary embodiment of the present invention.
As illustrated, the liquid crystal display module includes a
The
In addition, the
The
In this case, when the interval between the adjacent
In addition, the gap between the
The plurality of lamp guides 160 are configured such that the plurality of
In this case, the
In addition, the
That is, the plurality of lamp guides 160 are not positioned in line with each other in the arrangement direction of the
5a to 5b are a perspective view and a front view schematically showing a lamp guide according to the present invention.
As shown in FIG. 5A, the
In addition, the back of the
The
In addition, the first and
The first and
As shown in FIG. 5B, the first and second lampholders 166a and 166b are spaced apart from each other at different intervals around the
In addition, the second gap d corresponds to one half of the pitch between the
Accordingly, the first and
Accordingly, the first and
In this case, the second
Accordingly, when using the
As shown in FIG. 6, it can be seen that the circular shape unevenness (e) due to the obstruction of the light emitting area of the
At this time, the specific shape of the lamp holder (166a, 166b of Figure 5a) can be modified as much as possible, in particular, the shape of the support portion (168 of Figure 5a), including the fixed end (164 of Figure 5a) varies as desired Can be changed.
As described above, as described above, the present invention by preventing the deflection of the optical sheet, by controlling the distance between the optical sheet and the fluorescent lamp uniformly within the desired range to realize a uniform surface light source There is an effect that can greatly reduce the possibility of shaking or breakage of the fluorescent lamp by an external impact.
In addition, there is an effect that can realize a more uniform and high brightness by minimizing the unevenness by the obstruction of the fluorescent lamp.
Claims (13)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020070015265A KR20080075976A (en) | 2007-02-14 | 2007-02-14 | Backlight unit for liquid crystal display device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020070015265A KR20080075976A (en) | 2007-02-14 | 2007-02-14 | Backlight unit for liquid crystal display device |
Publications (1)
Publication Number | Publication Date |
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KR20080075976A true KR20080075976A (en) | 2008-08-20 |
Family
ID=39879312
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020070015265A KR20080075976A (en) | 2007-02-14 | 2007-02-14 | Backlight unit for liquid crystal display device |
Country Status (1)
Country | Link |
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KR (1) | KR20080075976A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103090277A (en) * | 2013-01-30 | 2013-05-08 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display device |
-
2007
- 2007-02-14 KR KR1020070015265A patent/KR20080075976A/en not_active Application Discontinuation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103090277A (en) * | 2013-01-30 | 2013-05-08 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display device |
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