CN103836439A - Backlight module - Google Patents
Backlight module Download PDFInfo
- Publication number
- CN103836439A CN103836439A CN201210474803.1A CN201210474803A CN103836439A CN 103836439 A CN103836439 A CN 103836439A CN 201210474803 A CN201210474803 A CN 201210474803A CN 103836439 A CN103836439 A CN 103836439A
- Authority
- CN
- China
- Prior art keywords
- light
- projection
- backlight module
- incidence surface
- face
- 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.)
- Granted
Links
Images
Abstract
The invention relates to a backlight module. The backlight module comprises a light guide plate and only one light source. The light guide plate comprises a body and a plurality of protrusions. The body comprises a light outlet face, a light inlet face, a first side face and a second side face, wherein the light inlet face, the first side face and the second side face are connected to the same side of the light outlet face, the light inlet face is connected with the first side face and the second side face, the included angle between the light inlet face and the first side face and the included angle between the light inlet face and the second side face are obtuse angles, and the first side face and the second side face are used for reflecting incident light coming to the surface of the first side face and the surface of the second side face so as to prevent the light from exiting from the body. The protrusions are arranged on the light inlet face at equal intervals and used for diverging the light emitted by the light source and guiding the light into the body. The light source faces the protrusions. The light outlet face is provided with an effective light outlet area and an edge area surrounding the effective light outlet area. The edge area comprises a light extension area close to the light inlet face and the first side face. The incident light coming to the body is repeatedly reflected in the light extension area so as to enter the effective light outlet area so that the light exiting from the effectively light outlet area can be uniform.
Description
Technical field
The present invention relates to backlight module, relate in particular to the backlight module that only uses a light source.
Background technology
The incidence surface of present LGP is generally larger, and the region that single source can irradiate is smaller, and in order to ensure the illuminance distribution of effective output optical zone of exiting surface of LGP, a side of incidence surface must arrange multiple light sources, thus consume electric power.
Summary of the invention
In view of this, be necessary to provide a kind of backlight module that makes the brightness of effective output optical zone be uniformly distributed and can effectively save electric energy.
A kind of backlight module, it comprises a LGP and a light source only.This LGP comprises a body and multiple projection.This body comprises an exiting surface, an incidence surface, first side and second side.This incidence surface, this first side and this second side are connected to the same side of this exiting surface, and this incidence surface connects this first side and this second side.The angle of this incidence surface and this first side is obtuse angle, and the angle of this incidence surface and this second side is obtuse angle.This first side and this second side, for reflecting inciding its surperficial light, prevent that light from penetrating from this body.The plurality of projection is set in qually spaced on this incidence surface, and this surface of light source arranges to the plurality of projection.The plurality of projection is dispersed and this light is imported in this body for the light that this light source is launched.This exiting surface has an effective output optical zone and a marginal zone around this effective output optical zone.This marginal zone comprises a light expansion area.This light expansion area, near this incidence surface and this first side, is injected this intrinsic light and in this light expansion area, is carried out multiple reflections to enter this effective output optical zone.
Compared with prior art, LGP of the present invention, by the plurality of projection being set at this incidence surface, the light that this light source is launched is dispersed and this light of major part is imported in this body, this light expansion area is also set simultaneously near this incidence surface, the light of injecting this body is carried out to multiple reflections, make from the light of this effective output optical zone outgoing more even.And owing to only using a light source, reduce the quantity of light source, can effectively save electric energy.
Brief description of the drawings
Fig. 1 is the structural representation of the backlight module of preferred embodiments of the present invention.
Fig. 2 is the top view of the LGP of the backlight module of Fig. 1.
Fig. 3 is the partial enlarged drawing at the III place of the LGP of Fig. 2.
Fig. 4 is the structural representation of each projection of the LGP of Fig. 2.
Main element symbol description
| |
100 |
| LGP | 10 |
| |
11 |
| Exiting |
101 |
| The |
102 |
| |
103 |
| The |
111 |
| The |
112 |
| The |
113 |
| The |
114 |
| Effectively output |
105 |
| |
106 |
| |
107 |
| |
16 |
| Bottom surface | 161 |
| Periphery | 162 |
| Stationary plane | 163 |
| Base | 164 |
| |
20 |
Following detailed description of the invention further illustrates the present invention in connection with above-mentioned accompanying drawing.
Detailed description of the invention
Referring to Fig. 1-2, is a kind of backlight module 100 that embodiment of the present invention provides, and it comprises a LGP 10 and a light source 20 only.In the present embodiment, this light source 20 is light emitting diode (Light emitting diode, LED).
This LGP 10 is made up of light transmissive material, such as acrylic resin, and Merlon, polyvinyl resin etc.This LGP 10 comprises a body 11 and multiple protruding 16.This body 11 is pentagonal prism tabular, and comprises an exiting surface 101, back side 102, incidence surface 103, first side 111, second side 112, the 3rd side 113 and the 4th side 114.This back side 102 is parallel to each other with this exiting surface 101.This incidence surface 103, this first side 111, this second side 112, the 3rd side 113 and the 4th side 114 all vertically connect this exiting surface 101 and this back side 102.This incidence surface 103 connects this first side 111 and this second side 112.This incidence surface 103 is obtuse angle with the angle theta 1 of this first side 111, and this incidence surface 103 is obtuse angle with the angle theta 2 of this second side 112.The 3rd side 113 is with this opposing setting in the first side 111 and be parallel to each other, and is connected with this second side 112.The 3rd side 113 is obtuse angle with the angle theta 3 of this second side 112.The 4th side 114 and this first side 111 and the 3rd side 113 is vertical is connected.In the present embodiment, θ 1=125 degree, θ 2=136 degree, θ 3=99 degree.
On this exiting surface 101, there is an effective output optical zone 105 and the marginal zone 106 around this effective output optical zone 105.This effective output optical zone 105 is rectangle, and wherein three articles of limits are parallel with this first side 111, the 3rd side 113 and the 4th side 114 respectively.This marginal zone 106 also comprises a light expansion area 107.This light expansion area 107 is near this incidence surface 103 and this second side 112.
Shown in Fig. 3-4, the plurality of protruding 16 are set in qually spaced on this incidence surface 103.In the present embodiment, the plurality of protruding 16 with this body 11 structure that is formed in one.Each protruding 16 are along being parallel to a less part in two parts that volume that a cylindrical short transverse is cut into this cylinder do not wait or along one of them semicylinder being parallel in two semicylinders that a cylindrical short transverse is cut into this cylinder.Each protruding 16 comprise the stationary plane 163 of the periphery 162 of the bottom surface 161 of two opposing settings, an arc and and these periphery 162 opposing settings.This periphery 162 and this stationary plane 163 all connect this two bottom surfaces 161.This stationary plane 163 is plane, and is arranged on this incidence surface 103.Each protruding 16 central shaft X0 is perpendicular to this exiting surface 101, and this central shaft X0 extends along the direction of the height h of this projection 16, and each protruding 16 height h equals the thickness H of this incidence surface 103 along the direction perpendicular to this exiting surface 101.Ultimate range between this periphery 162 and this stationary plane 163 is L.In the present embodiment, the radius of this bottom surface 161 is 97.5 microns of (μ m), h=450 μ m, L=60 μ m.
Each bottom surface 161 includes a base 164, and this base 164 is the limit crossing with corresponding stationary plane 163, each bottom surface 161.The length on this base 164 is D1, and the spacing between adjacent two projections 16 is D2, and the plurality of protruding 16 cycle D is the length D1 on each base 164 and space D 2 sums of every adjacent two projections 16, and 190um≤D < 280um.
This light source 20 arranges towards the plurality of protruding 16.The plurality of protruding 16 disperse and this light of major part are imported in this body 11 for the light that this light source 20 is launched.The light of injecting this LGP 10 carries out multiple reflections in this light expansion area 107, makes from the light of these effective output optical zone 105 outgoing more even.The utilization rate of light, for reflecting being incident upon its surperficial light, to prevent that light from penetrating from this back side 102, is improved in this back side 102.This effective output optical zone 105 is for deriving a part that incides its surperficial light this body 11, another part reflexes on this back side 102, make light can in this body 11, pass through multiple reflections, to be delivered to the one end at 114 places, the 4th side from the one end at these incidence surface 103 places.This first side 111, this second side 112, the 3rd side 113 and the 4th side 114 are for reflecting inciding its surperficial light, to prevent that light from penetrating from this body 11.
Experiment showed, that, in the time of D=180um, the light of the mid portion of this effective output optical zone 105 is fewer, in the time of D=280um, the light of the marginal portion of this effective output optical zone 105 is fewer, and as 190um≤D < 280um, the light of this effective output optical zone 105 is more even.Compared with prior art, backlight module 100 of the present invention, by arrange the plurality of protruding 16 at this incidence surface, the light that this light source 20 is launched is dispersed and this light of major part is imported in this body 11, this light expansion area 107 is also set simultaneously near this incidence surface 103, the light of injecting this body 11 is carried out to multiple reflections, make from the light of these effective output optical zone 105 outgoing more even.And owing to having reduced the quantity of light source 20, can effectively save electric energy.
Be understandable that, for the person of ordinary skill of the art, can make other various corresponding changes and distortion 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 (8)
1. a backlight module, it comprises a LGP and a light source only, and this LGP comprises a body and multiple projection, and this body comprises an exiting surface, an incidence surface, first side and second side; This incidence surface, this first side and this second side are connected to the same side of this exiting surface, and this incidence surface connects this first side and this second side, and the angle of this incidence surface and this first side is obtuse angle, and the angle of this incidence surface and this second side is obtuse angle; This first side and this second side, for reflecting inciding its surperficial light, prevent that light from penetrating from this body; The plurality of projection is set in qually spaced on this incidence surface, and this surface of light source arranges to the plurality of projection; The plurality of projection is dispersed and this light is imported in this body for the light that this light source is launched; This exiting surface has an effective output optical zone and a marginal zone around this effective output optical zone, this marginal zone comprises a light expansion area, this light expansion area, near this incidence surface and this first side, is injected this intrinsic this light and in this light expansion area, is carried out multiple reflections to enter this output optical zone.
2. backlight module as claimed in claim 1, it is characterized in that, each projection of the plurality of projection is all along the wherein part being parallel in two parts that a cylindrical short transverse is cut into this cylinder, each projection comprises the stationary plane of the bottom surface of two opposing settings, circular-arc periphery and and the opposing setting of this periphery, and this periphery and this stationary plane all connect this two bottom surfaces; This stationary plane is plane and is arranged on this incidence surface; The intersection of each bottom surface and this incidence surface is base, the length that the cycle D of the plurality of projection is each this base and every adjacent two these protruding spacing sums and 190um≤D < 280um.
3. backlight module as claimed in claim 2, is characterized in that, the central shaft of each projection is perpendicular to this exiting surface, and this central shaft extends along this protruding short transverse, and the height of each projection equals this incidence surface along the thickness perpendicular to this exiting surface direction.
4. backlight module as claimed in claim 2, it is characterized in that, each projection is along being parallel to a less part in two parts that volume that a cylindrical short transverse is cut into this cylinder do not wait or along one of them semicylinder being parallel in two semicylinders that a cylindrical short transverse is cut into this cylinder.
5. backlight module as claimed in claim 1, it is characterized in that, this body also comprise one with the back side of the opposing setting of this exiting surface, this incidence surface, this first side and this second side all connect this back side, this back side, for reflecting inciding its surperficial light, prevents that light from penetrating from this LGP.
6. backlight module as claimed in claim 5, it is characterized in that, this body also comprises the 3rd side and the 4th side, and the 3rd side and the 4th side all connect this exiting surface and this bottom surface, the 3rd side and this opposing setting in the first side and be parallel to each other, and be connected with this second side; The 4th side connects this first side and the 3rd side; The 3rd side and the 4th side, for reflecting inciding its surperficial light, prevent that light from penetrating from this LGP.
7. backlight module as claimed in claim 1, is characterized in that, the plurality of projection and this body structure that is formed in one.
8. backlight module as claimed in claim 1, is characterized in that, this light source is light emitting diode.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810036568.7A CN108227069A (en) | 2012-11-21 | 2012-11-21 | Backlight module |
| CN201210474803.1A CN103836439B (en) | 2012-11-21 | 2012-11-21 | Backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210474803.1A CN103836439B (en) | 2012-11-21 | 2012-11-21 | Backlight module |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810036568.7A Division CN108227069A (en) | 2012-11-21 | 2012-11-21 | Backlight module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103836439A true CN103836439A (en) | 2014-06-04 |
| CN103836439B CN103836439B (en) | 2018-01-26 |
Family
ID=50800202
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210474803.1A Active CN103836439B (en) | 2012-11-21 | 2012-11-21 | Backlight module |
| CN201810036568.7A Withdrawn CN108227069A (en) | 2012-11-21 | 2012-11-21 | Backlight module |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810036568.7A Withdrawn CN108227069A (en) | 2012-11-21 | 2012-11-21 | Backlight module |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN103836439B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001357714A (en) * | 2000-06-15 | 2001-12-26 | Yuka Denshi Kk | Surface illumination device and a liquid crystal display using it |
| US20050259438A1 (en) * | 2003-02-21 | 2005-11-24 | Minebea Co., Ltd. | Spread illuminating apparatus with light conductive plate having polygonal configuration |
| US20070091640A1 (en) * | 2005-10-20 | 2007-04-26 | Hwan-Jin Kim | Light guide unit for point light source, backlight assembly having the light guide unit and display device having the same |
| CN201035177Y (en) * | 2007-01-19 | 2008-03-12 | 台湾奈普光电科技股份有限公司 | Improved structure of light conducting plate |
| CN101750666A (en) * | 2008-12-05 | 2010-06-23 | 清华大学 | Light guide plate and backlight module using thereof |
| TWI337277B (en) * | 2005-07-22 | 2011-02-11 | Hon Hai Prec Ind Co Ltd | Light guide plate and backlight module |
| KR20120022367A (en) * | 2010-09-02 | 2012-03-12 | 엘지이노텍 주식회사 | A back light unit |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101988686A (en) * | 2009-08-03 | 2011-03-23 | 友达光电股份有限公司 | Light guide plate |
| CN102168841A (en) * | 2010-02-26 | 2011-08-31 | 中强光电股份有限公司 | Light guide plate and backlight module |
-
2012
- 2012-11-21 CN CN201210474803.1A patent/CN103836439B/en active Active
- 2012-11-21 CN CN201810036568.7A patent/CN108227069A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001357714A (en) * | 2000-06-15 | 2001-12-26 | Yuka Denshi Kk | Surface illumination device and a liquid crystal display using it |
| US20050259438A1 (en) * | 2003-02-21 | 2005-11-24 | Minebea Co., Ltd. | Spread illuminating apparatus with light conductive plate having polygonal configuration |
| TWI337277B (en) * | 2005-07-22 | 2011-02-11 | Hon Hai Prec Ind Co Ltd | Light guide plate and backlight module |
| US20070091640A1 (en) * | 2005-10-20 | 2007-04-26 | Hwan-Jin Kim | Light guide unit for point light source, backlight assembly having the light guide unit and display device having the same |
| CN201035177Y (en) * | 2007-01-19 | 2008-03-12 | 台湾奈普光电科技股份有限公司 | Improved structure of light conducting plate |
| CN101750666A (en) * | 2008-12-05 | 2010-06-23 | 清华大学 | Light guide plate and backlight module using thereof |
| KR20120022367A (en) * | 2010-09-02 | 2012-03-12 | 엘지이노텍 주식회사 | A back light unit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103836439B (en) | 2018-01-26 |
| CN108227069A (en) | 2018-06-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101750666B (en) | Light guide plate and backlight module using thereof | |
| US7254308B2 (en) | Light guide plate and backlight module using the same | |
| CN202267758U (en) | Light guide plate, backlight source and display device | |
| US20140321157A1 (en) | Back light unit with light guide plate preventing dark area between leds | |
| JP2015527687A (en) | Light guiding device, light emitting device, electronic device, and key | |
| CN102052634A (en) | Structure for predominating light-emitting brightness or uniformization of light guide plate | |
| CN104456425A (en) | Planar light source | |
| CN201589201U (en) | Structure for enhancing or homogenizing brightness of light guide plate | |
| US20110157912A1 (en) | Light guide plate and related backlight module | |
| CN101761829A (en) | Backlight module and display device using same | |
| CN103048727A (en) | LGP (Light Guide Plate), backlight source and LCD (Liquid Crystal Display) device | |
| US20140313777A1 (en) | Light guiding plate and backlight module using same | |
| US9028124B2 (en) | Light guide plate and backlight module including same | |
| CN105473933A (en) | Light guide plate, planar light source device, and transmissive image display device | |
| CN103836439A (en) | Backlight module | |
| US9354380B2 (en) | Light diffusion plate and backlight module using same | |
| CN202057825U (en) | Light guide plate and backlight module | |
| CN103968294A (en) | Backlight module and light guide plate thereof | |
| US9004735B2 (en) | Backlight module having uniform light emission | |
| CN202600177U (en) | Light guide plate, edge-type backlight module and display device | |
| CN103453342A (en) | Backlight module and liquid crystal display device | |
| US20090303696A1 (en) | Diffusion plate and backlight module using the same | |
| CN102116454A (en) | Light guide plate and backlight module using same | |
| CN207895100U (en) | Light guide plate | |
| US20140301105A1 (en) | Back light unit with light guide plate preventing dark area between leds |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20170929 Address after: Guangdong province Shenzhen city Longhua District Dalang street community of Longsheng gold dragon road e-commerce incubator exhibition Tao Commercial Plaza E block 706 Applicant after: Shenzhen step Technology Transfer Center Co., Ltd. Address before: 518109 Guangdong city of Shenzhen province Baoan District Longhua Town Industrial Zone tabulaeformis tenth East Ring Road No. 2 two Applicant before: Hongfujin Precise Industry (Shenzhen) Co., Ltd. Applicant before: Hon Hai Precision Industry Co., Ltd. |
|
| TA01 | Transfer of patent application right | ||
| CB03 | Change of inventor or designer information |
Inventor after: Liao Weijun Inventor before: Chen Baizhou |
|
| CB03 | Change of inventor or designer information | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20171123 Address after: 200331 Shanghai, Qilian Mountains, South Road, No. 2889, building 3, building on the west side of the building, 3 Applicant after: China (Shanghai) Optoelectronics Technology Co., Ltd. Address before: 518000 Guangdong Province, Shenzhen New District of Longhua City, Dalang street, Longsheng Gold Dragon Road community e-commerce incubator exhibition Tao Commercial Plaza E block 706 Applicant before: Shenzhen step Technology Transfer Center Co., Ltd. |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |