CN103899974B - Backlight module - Google Patents
Backlight module Download PDFInfo
- Publication number
- CN103899974B CN103899974B CN201210568852.1A CN201210568852A CN103899974B CN 103899974 B CN103899974 B CN 103899974B CN 201210568852 A CN201210568852 A CN 201210568852A CN 103899974 B CN103899974 B CN 103899974B
- Authority
- CN
- China
- Prior art keywords
- guide plate
- light
- light guide
- groove
- backlight module
- 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.)
- Expired - Fee Related
Links
Abstract
A backlight module comprises a light guide plate and a plurality of light-emitting diode light sources arranged in the side direction of the light guide plate. The light guide plate is provided with a top surface and a bottom surface opposite to the top surface. A groove sunken in the direction far away from the light-emitting diode light sources is formed in one side, close to the light-emitting diode light sources, of the light guide plate. The extension direction of the groove and the arrangement direction of the light-emitting diode light sources are the same. The groove enables external light shining on the groove to be refracted, and then the original direction of the light is changed. A reflection layer is arranged on the bottom surface.
Description
Technical field
The present invention relates to a kind of backlight module, the backlight module of more particularly, to a kind of utilization rate improving light.
Background technology
Compared to traditional light emitting source, light emitting diode（Light Emitting Diode, LED）There is lightweight, small volume, the low, life-span length of pollution, it, as a kind of new light emitting source, has been applied in the middle of each field more and more.
However, the backlight module of liquid crystal panel generally includes a light guide plate and is arranged on the lateral some LED sources of this light guide plate.This some LED source is transversely arranged, so that the light being partly parallel to the top surface of this light guide plate cannot be derived from the top surface of this light guide plate after injecting light guide plate, and directly send away from the side of this LED source from this light guide plate, so, this some light cannot be utilized, so that the light efficiency of backlight module reduces.
Content of the invention
In view of this, the present invention is intended to provide a kind of improve light utilization rate backlight module.
A kind of backlight module, including a light guide plate with located at the lateral some LED sources of this light guide plate, this light guide plate has a top surface and a bottom surface relative with this top surface, this light guide plate is provided with the groove to the direction depression away from this some LED source near the side of this some LED source, and the bearing of trend of this groove is consistent with the orientation of this some LED source, and this groove makes external incident light thereon reflect, and then changing the original direction of this light, this bottom surface is provided with reflecting layer.
Pass through the groove near the oriented side depression away from this LED source of one side setting of this some LED source in this light guide plate in the present invention, this groove makes incident light thereon refraction occur and then change direction, the light making the top surface parallel to this light guide plate that this LED source sends forms a fixed inclination with the top surface of this light guide plate under the refraction of this groove, a portion projects this top surface and goes out light, avoid optical loss, improve the luminous efficiency of this backlight module.
Brief description
The structural representation of the backlight module that Fig. 1 provides for a preferred embodiment of the present invention.
Fig. 2 is the inversion figure of backlight module in Fig. 1.
Fig. 3 is the side view of backlight module and light path schematic diagram in Fig. 1.
Main element symbol description
| Backlight module | 1 |
| Light guide plate | 10 |
| Top surface | 11 |
| Bottom surface | 12 |
| Raised line | 121 |
| Leading flank | 13 |
| Groove | 131 |
| Upper surface | 132 |
| Lower surface | 133 |
| Trailing flank | 14 |
| Left surface | 15 |
| Right flank | 16 |
| LED source | 20 |
Following specific embodiment will further illustrate the present invention in conjunction with above-mentioned accompanying drawing.
Specific embodiment
As depicted in figs. 1 and 2, the backlight module 1 that a preferred embodiment of the present invention provides, it includes a light guide plate 10, is arranged on lateral some LED sources 20 of light guide plate 10.
Light guide plate 10 is in substantially a rectangular panel body, and its interior light is incident upon and occurs the critical angle being totally reflected to be β during air.Light guide plate 10 has a top surface 11 and a bottom surface 12 relative with top surface 11, and a leading flank 13, a trailing flank 14, a left surface 15 and the right flank 16 connecting top surface 11 and bottom surface 12.
Top surface 11 is in smooth surfaces shape, and bottom surface 12 is provided with some raised lines 121 of continuous adjacent setting, and which is provided with reflecting layer.This some raised line 121 extends to right flank 16 from the left surface 15 of light guide plate 10, and arranged in parallel.In the present embodiment, the section of raised line 121 is curved.Certainly, the section of raised line 121 also can V-shaped or other shapes.The centre position of leading flank 13 longitudinal direction is provided with the groove 131 to trailing flank 14 side depression, and the bearing of trend of groove 131 is identical with the bearing of trend of raised line 121.Groove 131 makes incident light thereon reflect, and then changes its incident direction.In the present embodiment, the section of groove 131 is V-shaped, and groove 131 has a upper surface 132 of the top surface 11 of close light guide plate 10 and a lower surface 133 of the bottom surface 12 near light guide plate 10.Certainly, the section of groove 131 also can curved, zigzag or other shapes.
This some LED sources 20 groove 131 just to light guide plate 10, and it is horizontally arranged at interval.
Please refer to Fig. 3, when backlight module 1 works, the light that this some LED source 20 sends is incident upon the groove 131 of light guide plate 10 from all directions, and then is refracted to the inside of light guide plate 10.Wherein behind the upper surface 132 of the light directive groove 131 of the top surface 11 parallel to light guide plate 10 that LED source 20 sends or lower surface 133, refraction due to upper surface 132 or lower surface 133, and make this some light deviate original direction, and then the top surface 11 of directive light guide plate 10 or bottom surface 12.Below, it is described with the light being incident to the top surface 11 of light guide plate 10.When the top surface 11 of light directive light guide plate 10, if incidence angle is less than β, light directly projects top surface 11 and goes out light；If incidence angle is more than or equal to β, light is totally reflected, and then is directed to the bottom surface 12 of light guide plate 10.Reflecting layer is coated due on bottom surface 12, and which is provided with spaced some raised lines 121, therefore the light that this part is directed to bottom surface 12 can be reflected towards top surface 11 again by bottom surface 12, and this light is when being again incident on top surface 11, because the shape of raised line 121 leads to its incidence angle being again incident on during top surface 11 to change, this some light is possibly realized via top surface 11 outgoing, if the incidence angle after changing is still above critical angle beta, will be again by top surface 11 guide floor 12, so repeatedly until light is via top surface 11 outgoing.Likewise, the path of the light of bottom surface 12 being incident to light guide plate 10 that LED source 20 sends is ibid similar.So, the light of the top surface 11 parallel to light guide plate 10 that script LED source 20 sends is under the upper surface 132 of groove 131 or the refraction of lower surface 133, again through some raised lines 121 of bottom surface 12 and the effect of reflector layer of light guide plate 10, major part projects top surface 11 and goes out light, avoid light directly to lose from trailing flank 14 outgoing, improve the light utilization ratio of backlight module 1.
In the present invention, light guide plate 10 passes through the groove 131 in the oriented side depression away from LED source 20 of one side setting near this some LED source 20, this groove 131 makes incident light thereon refraction occur and then change direction, and the bottom surface 12 of light guide plate 10 is provided with reflecting layer and some raised lines 121, so, the light of the top surface 11 parallel to light guide plate 10 that script LED source 20 sends is under the refraction of groove 131, again through some raised lines 121 of bottom surface 12 and the effect of reflector layer of light guide plate 10, it is incident to the incidence angle of top surface 11 by repeatedly changing it until it is less than critical angle beta, finally via top surface 11 outgoing, avoid light directly to lose from trailing flank 14 outgoing, improve the light utilization ratio of backlight module 1.
It is to be appreciated that some raised lines 121 on the bottom surface 12 of light guide plate 10 can also interval setting.Fig. 1 to Fig. 3 is only for compactly showing the principle of backlight module 1, do not show that the other structures of backlight module 1, therefore in the present invention, backlight module 1 is not limited to only include the structure shown by figure, and it can also include liquid crystal panel and other supporting construction, will not be described here.
The technology contents of the present invention and technical characterstic are disclosed above, but those skilled in the art are still potentially based on teachings of the present invention and announcement and make a variety of replacements without departing substantially from spirit of the present invention and modification.Therefore, protection scope of the present invention should be not limited to the content disclosed in embodiment, and should include the various replacements without departing substantially from the present invention and modification, and is covered by appended claim.
Claims (8)
1. a kind of backlight module, including a light guide plate and located at this light guide plate lateral some luminous two
Pole pipe light source, this light guide plate has a top surface and a relative bottom surface parallel with this top surface, its feature
It is：This light guide plate is provided with groove near the side of this some LED source, and this groove has
There is a lower surface of the upper surface of top surface near this light guide plate and the bottom surface near this light guide plate,
This upper surface tilts to extend from this top surface to the direction of this bottom surface, and this lower surface is from this bottom surface to this top
The direction in face tilts to extend, and this lower surface intersects with this upper surface, and the bearing of trend of this groove and
The orientation of this some LED source is consistent, and this groove makes external incident light thereon
Line reflects, and then changes the original direction of this light, and this bottom surface is provided with reflecting layer.
2. backlight module as claimed in claim 1 it is characterised in that：If being provided with this bottom surface
Dry raised line, this reflecting layer is arranged on this some raised line, and this some raised line is along LED source
Orientation extend to its relatively opposite side from the side of this light guide plate, and the extension of each raised line
Direction is consistent with the bearing of trend of this groove.
3. backlight module as claimed in claim 2 it is characterised in that：The section of this raised line is in arc
Shape.
4. backlight module as claimed in claim 2 it is characterised in that：The section of this raised line is in V
Shape.
5. backlight module as claimed in claim 2 it is characterised in that：This some raised line continuously sets
Put on this bottom surface.
6. backlight module as claimed in claim 2 it is characterised in that：This some raised line interval sets
Put on this bottom surface.
7. backlight module as claimed in claim 1 it is characterised in that：The section of this groove is in V
Shape.
8. backlight module as claimed in claim 1 it is characterised in that：The section of this groove is in arc
Shape or zigzag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210568852.1A CN103899974B (en) | 2012-12-25 | 2012-12-25 | Backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210568852.1A CN103899974B (en) | 2012-12-25 | 2012-12-25 | Backlight module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103899974A CN103899974A (en) | 2014-07-02 |
| CN103899974B true CN103899974B (en) | 2017-02-08 |
Family
ID=50991470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210568852.1A Expired - Fee Related CN103899974B (en) | 2012-12-25 | 2012-12-25 | Backlight module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103899974B (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3180147B2 (en) * | 1994-12-21 | 2001-06-25 | 株式会社北斗製作所 | Light guide plate for liquid crystal display |
| CN2763838Y (en) * | 2004-09-18 | 2006-03-08 | 清华大学 | Light guiding board |
| CN100426087C (en) * | 2006-01-06 | 2008-10-15 | 清华大学 | Light guide plate and backlight module using same |
| CN101900299A (en) * | 2009-05-26 | 2010-12-01 | 鸿富锦精密工业（深圳）有限公司 | Light guide plate and backlight module |
-
2012
- 2012-12-25 CN CN201210568852.1A patent/CN103899974B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN103899974A (en) | 2014-07-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI414673B (en) | Light guide microstructure plate, light guiding method, and application on window structure | |
| CN103363448A (en) | Light guide element, lighting module and panel lamp | |
| CN201053627Y (en) | Backlight board for decoration | |
| CN102893075A (en) | Backlight device and liquid crystal display device | |
| TWI522572B (en) | Illumination apparatus | |
| CN202647428U (en) | Laterally-entering type backlight module and display unit | |
| US20190278016A1 (en) | Light guide plate, backlight module and display device | |
| US20130114267A1 (en) | Converging illuminant device | |
| CN202305872U (en) | Light guide plate and light source module | |
| US8031405B2 (en) | Optical adjusting apparatus with composite pattern structure | |
| CN103629600A (en) | Backlight module | |
| CN101660705A (en) | Polarized-light illuminating optical lens | |
| CN104235758B (en) | Lens, the light-guiding shade with the lens and the lighting device using the lens | |
| CN102588802A (en) | LED planar lamp | |
| TWI539114B (en) | Light source module and light emitting device having same | |
| TWI536335B (en) | Light emitting diode display unit and light emitting diode display | |
| US8858056B2 (en) | Light guide plate and corresponding backlight module | |
| CN103899974B (en) | Backlight module | |
| CN103899975A (en) | Backlight module | |
| CN202008043U (en) | Light emitting diode (LED) panel lamp | |
| CN104808280B (en) | Light guide plate and the backlight module for using the light guide plate | |
| TWM451470U (en) | Reflection sheet with light guide points, LED flat planar light source, LED flat lamp and plate LED lamp | |
| CN203082798U (en) | Electric bicycle light-emitting diode (LED) light guiding bar | |
| CN103968331A (en) | Light guide device and light source device | |
| CN102606926A (en) | Panel LED (light emitting diode) lamp |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170208 Termination date: 20171225 |