CN104345494A - Backlight module - Google Patents
Backlight module Download PDFInfo
- Publication number
- CN104345494A CN104345494A CN201310327777.4A CN201310327777A CN104345494A CN 104345494 A CN104345494 A CN 104345494A CN 201310327777 A CN201310327777 A CN 201310327777A CN 104345494 A CN104345494 A CN 104345494A
- Authority
- CN
- China
- Prior art keywords
- lens
- light
- diffuser plate
- backlight module
- emitting diode
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
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- 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
- F21V5/00—Refractors for light sources
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2101/00—Point-like light sources
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
Abstract
A backlight module comprises a plurality of LEDs, a plurality of lenses and a diffuser. Each lens comprises a light incoming face and a light outgoing face. The diffuser also comprises a light incoming face and a light outgoing face. The light outgoing face of every lens faces the light incoming face of the diffuser. The light incoming face of every lens faces the LEDs. The LEDs are in one-to-one correspondence with the lenses. Beams from the LEDs enter the light incoming faces of the lenses and exit from the light outgoing faces of the lenses; the beams exiting from the light outgoing faces of the lenses perpendicularly enter the light incoming face of the diffuser and exit from the light outgoing face of the diffuser; a path of each beam in the diffuser is greatly shortened, the rate of the beams penetrating the diffuser is greatly increased, and light utilization efficiency of the backlight module is improved accordingly.
Description
Technical field
The present invention relates to the backlight module of liquid crystal display, particularly relate to a kind of backlight module with multiple light emitting diode.
Background technology
A kind of down straight aphototropism mode set for liquid crystal display of the prior art comprises multiple light emitting diode, be positioned at a diffuser plate above this light emitting diode.Usually, down straight aphototropism mode set uses less light emitting diode, the light sent to make light emitting diode can reach diffuser plate and obtain area source, and on light emitting diode, also cover is put light that diverging lens makes light emitting diode send and before entering diffuser plate, is first diffused lens changes incident angle when entering diffuser plate.But, the light that light emitting diode sends is all very large at the incident angle entering diffuser plate after diverging lens, and the larger light of incident angle is longer through the path of diffuser plate, the penetrance making light pass diffuser plate declines, and causes the light utilization ratio of backlight module greatly to reduce.
Summary of the invention
In view of this, the backlight module providing a kind of smooth utilization ratio higher is necessary.
A kind of backlight module, it comprises multiple light emitting diode, multiple lens and a diffuser plate, each lens have an incidence surface and an exiting surface, this diffuser plate has an incidence surface and an exiting surface, the exiting surface of these lens is towards the incidence surface of this diffuser plate, the incidence surface of these lens is towards light emitting diode, light emitting diode and lens are arranged correspondingly, the light that light emitting diode sends is incident from the incidence surface of lens, from the exiting surface outgoing of lens, from the light of the exiting surface outgoing of lens vertically enter diffuser plate incidence surface and from the exiting surface outgoing of diffuser plate.
In backlight module of the present invention, the light that light emitting diode sends is converted to the light of the incidence surface perpendicular to diffuser plate before entering diffuser plate by lens, make vertically to enter diffuser plate from the light of lens outgoing, substantially reduce the stroke of light in diffuser plate, substantially increase the penetrance of light through diffuser plate, and then improve the light utilization ratio of backlight module.
Accompanying drawing explanation
The structural representation of the backlight module that Fig. 1 provides for one embodiment of the invention.
Main element symbol description
Following embodiment will further illustrate the present invention in conjunction with above-mentioned accompanying drawing.
Embodiment
Refer to Fig. 1, the down straight aphototropism mode set 10 being used as the backlight of liquid crystal display that one embodiment of the invention provides, this backlight module 10 comprises a light source 11 and is arranged on the optical membrane plate group 12 on this light source 11.This light source 11 comprises a substrate 112 and is located at multiple light emitting diodes 114 of arrangement on this substrate 112, in matrix.This optical membrane plate group 12 comprises multiple lens 122, diffuser plate 124 and two brightness enhancement film 126,128.
This diffuser plate 124 has an incidence surface 125 and an exiting surface 127 relative with this incidence surface 125.This incidence surface 125 and this exiting surface 127 are plane, and are parallel to each other.As required, a large amount of scattering particles 129 is filled with in order to scattered beam between the incidence surface 125 of diffuser plate 124 and exiting surface 127.
Described brightness enhancement film 126,128 is arranged on this diffuser plate 124, for concentrating the area source for having specific angle to penetrate to liquid crystal panel the homogenising light from diffuser plate 124 outgoing again.
Lens 122 are between described light source 11 and diffuser plate 124.Each lens 122 have an incidence surface 121 and an exiting surface 123 relative with this incidence surface 121.This exiting surface 123 is a plane, and it is towards the incidence surface 125 of this diffuser plate 124.In the present embodiment, this exiting surface 123 is just relative with the incidence surface 125 of this diffuser plate 124, and the exiting surface 123 of each lens 122 is sticked on the incidence surface 125 of this diffuser plate 124.This incidence surface 121 is a curved surface protruded towards light emitting diode 114.
The number of light emitting diode 114 is consistent with the number of lens 122.Light emitting diode 114 and lens 122 are all in rectangular arrangement, and light emitting diode 114 and lens 122 are arranged correspondingly.Each light emitting diode 114 is arranged on the focus place of lens 122 accordingly.The light that light emitting diode 114 sends is incident from the incidence surface 121 of lens 122, then from exiting surface 123 outgoing of lens 122.Be parallel to each other from the light of exiting surface 123 outgoing of lens 122, and enter diffuser plate 124 with the angle of the incidence surface 125 perpendicular to diffuser plate 124, such light is the shortest through the path of diffuser plate 124.
Backlight module 10 of the present invention is by being arranged at the focal position place of corresponding each lens 122 by light emitting diode 114 array, the light that light emitting diode 114 is sent is converted to the light of the incidence surface 125 perpendicular to diffuser plate 124 before entering diffuser plate 124 by lens 122, make vertically to enter diffuser plate 124 from the light of lens 122 outgoing, substantially reduce the stroke of light in diffuser plate 124, thus substantially increase the penetrance of light through diffuser plate 124, and then improve the light utilization ratio of backlight module 10.
Be understandable that, for the person of ordinary skill of the art, other various corresponding change and distortion can be made by technical conceive according to the present invention, and all these change the protection domain that all should belong to the claims in the present invention with distortion.
Claims (10)
1. a backlight module, it comprises multiple light emitting diode, multiple lens and a diffuser plate, it is characterized in that, each lens have an incidence surface and an exiting surface, this diffuser plate has an incidence surface and an exiting surface, the exiting surface of these lens is towards the incidence surface of this diffuser plate, the incidence surface of these lens is towards light emitting diode, light emitting diode and lens are arranged correspondingly, the light that light emitting diode sends is incident from the incidence surface of lens, from the exiting surface outgoing of lens, from the light of the exiting surface outgoing of lens vertically enter diffuser plate incidence surface and from the exiting surface outgoing of diffuser plate.
2. backlight module as claimed in claim 1, is characterized in that, each light emitting diode is arranged on the focus place of corresponding lens.
3. backlight module as claimed in claim 1, it is characterized in that, incidence surface and the exiting surface of this diffuser plate are plane, and are parallel to each other.
4. backlight module as claimed in claim 3, it is characterized in that, the exiting surface of these lens is a plane, is sticked on the incidence surface of this diffuser plate.
5. backlight module as claimed in claim 4, it is characterized in that, the incidence surface of these lens is a curved surface protruded towards this light emitting diode.
6. backlight module as claimed in claim 1, it is characterized in that, this light emitting diode and this lens are all in rectangular arrangement.
7. backlight module as claimed in claim 1, it is characterized in that, also comprise a substrate, this light emitting diode is located on this substrate.
8. backlight module as claimed in claim 1, is characterized in that, also comprise two brightness enhancement film be arranged on this diffuser plate.
9. backlight module as claimed in claim 1, is characterized in that, be filled with scattering particle between the incidence surface of this diffuser plate and exiting surface.
10. backlight module as claimed in claim 1, it is characterized in that, the number of this light emitting diode is consistent with the number of these lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310327777.4A CN104345494A (en) | 2013-07-31 | 2013-07-31 | Backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310327777.4A CN104345494A (en) | 2013-07-31 | 2013-07-31 | Backlight module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104345494A true CN104345494A (en) | 2015-02-11 |
Family
ID=52501447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310327777.4A Pending CN104345494A (en) | 2013-07-31 | 2013-07-31 | Backlight module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104345494A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080225207A1 (en) * | 2007-03-14 | 2008-09-18 | Lg Electronics Inc. | Optical sheet and liquid crystal display using the same |
| CN101346582A (en) * | 2005-12-27 | 2009-01-14 | 松下电器产业株式会社 | Planar lighting device and liquid crystal display device using the same |
| CN101351739A (en) * | 2005-10-21 | 2009-01-21 | 罗门哈斯丹麦金融有限公司 | Backlight arrangement for uniform illumination using surface-emitting light source |
| KR20090044244A (en) * | 2007-10-31 | 2009-05-07 | 삼성정밀화학 주식회사 | Prism sheet having lengthwise wave patterned prisms and convex diffusers, back light unit having the prism sheet and liquid crystal display device having the back light unit |
| CN101889167A (en) * | 2007-12-07 | 2010-11-17 | 索尼公司 | Light source apparatus and display apparatus |
-
2013
- 2013-07-31 CN CN201310327777.4A patent/CN104345494A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101351739A (en) * | 2005-10-21 | 2009-01-21 | 罗门哈斯丹麦金融有限公司 | Backlight arrangement for uniform illumination using surface-emitting light source |
| CN101346582A (en) * | 2005-12-27 | 2009-01-14 | 松下电器产业株式会社 | Planar lighting device and liquid crystal display device using the same |
| US20080225207A1 (en) * | 2007-03-14 | 2008-09-18 | Lg Electronics Inc. | Optical sheet and liquid crystal display using the same |
| KR20090044244A (en) * | 2007-10-31 | 2009-05-07 | 삼성정밀화학 주식회사 | Prism sheet having lengthwise wave patterned prisms and convex diffusers, back light unit having the prism sheet and liquid crystal display device having the back light unit |
| CN101889167A (en) * | 2007-12-07 | 2010-11-17 | 索尼公司 | Light source apparatus and display apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150211 |
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| WD01 | Invention patent application deemed withdrawn after publication |