CN102128415A - Light guide plate, backlight module and liquid crystal display device - Google Patents
Light guide plate, backlight module and liquid crystal display device Download PDFInfo
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- CN102128415A CN102128415A CN2010100016482A CN201010001648A CN102128415A CN 102128415 A CN102128415 A CN 102128415A CN 2010100016482 A CN2010100016482 A CN 2010100016482A CN 201010001648 A CN201010001648 A CN 201010001648A CN 102128415 A CN102128415 A CN 102128415A
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- light incident
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Abstract
The invention discloses a light guide plate, a backlight module and a liquid crystal display device. The light guide plate comprises a body and a plurality of mesh points, wherein the body is provided with a light entering side face, a first surface and a second surface opposite to the first surface; the first surface is a rough surface; the plurality of mesh points are formed on the first surface; and the density of the mesh points close to the light entering side face is greater than the density of the mesh points far away from the light entering side face. Due to the arrangement of the rough surface and the mesh points, the loss of light rays in the light guide plate can be reduced and the light emitting efficiency can be improved; and moreover, the density of the mesh points close to a light source side is greater than the density of the mesh points far away from the light source side, so that the light guide plate can emit light uniformly.
Description
Technical field
The present invention, particularly about a kind of LGP with site configuration and can be used in backlight module and the liquid crystal indicator about a kind of LGP.
Background technology
In recent years, because the development of Display Technique, traditional cathode-ray display unit is replaced by liquid crystal indicator gradually.General liquid crystal indicator is mainly combined by a display panels (liquidcrystal display panel) and a backlight module (backlight module).Wherein, backlight module is in order to provide uniform surface light source, and light cooperates upper and lower polaroid just can produce image via the modulation of display panels again.
Wherein, according to the position that light source is provided with, backlight module can be divided into straight-down negative (direct type) and side-light type (edge light type).In side light type back light module, because light source is arranged on the side of backlight module, so need to come leaded light to produce uniform surface light source by optical sheet, that this kind optical sheet claims is LGP (light guide plate).
Please refer to shown in Figure 1ly, a kind of known LGP 1 is wedge shape, and has a light incident sides 11, a reflecting surface 12 and an exiting surface 13.Light source (not shown) neighbour is located at light incident sides 11 and launches light and enters in the LGP 1, and light penetrates towards exiting surface 13 by reflecting surface 12 reflections.
Because light after light incident sides 11 enters LGP 1, carries out total reflection easily in LGP 1, make light penetrate LGP 1 so need to destroy total reflection by being provided with of site 14.A plurality of sites 14 are arranged on the reflecting surface 12 of LGP 1, when light is mapped to the site 14 of LGP 1, can produces scattering and destroy the total reflection phenomenon of light, and make the part light refraction go out the exiting surface 13 of LGP 1.
Be to produce uniform area light source, site 14 density is set also along with different with the distance of light source (from sparse to dense) along the direction of arrow of Fig. 1.From the nearer zone of light incident sides 11, because near light source, its light intensity is stronger, so site 14 is less in this regional density, so that the light of ejaculation LGP 1 is less; And from light incident sides 11 zone far away because away from light source, its light intensity a little less than, so site 14 is bigger in this regional density, so that the light of ejaculation LGP 1 is more, whereby to reach uniform surface light source.
The design of known site is in order to the total reflection of destruction light in LGP, and makes light by penetrating in the LGP.But this kind design, often light extraction efficiency is relatively poor, can't reach needed brightness, so that needs to supply brightness of backlight module with expensive blooming piece or the energy that increases light source.
Therefore, how to provide a kind of LGP to reduce the consumption of light in LGP, real is one of current important topic.
Summary of the invention
The purpose of this invention is to provide a kind of LGP, backlight module, liquid crystal indicator, LGP wherein can provide uniform brightness, and reduces cost.
The present invention can realize by the following technical solutions.
A kind of LGP of the present invention comprises a body and a plurality of site.Body has at least one light incident sides and the relative second surface that is provided with at described first surface with of a first surface, and wherein first surface is a matsurface.Described site is arranged on first surface, and described site is extremely dredged by close from the density of extremely relative described another light incident sides of described light incident sides.
Aforesaid LGP, wherein, the described site on the described LGP is extremely dredged by close from the density of another extremely relative light incident sides of described light incident sides.
Aforesaid LGP, wherein, the roughness of described matsurface is between 0.5～20 μ m.
Aforesaid LGP, wherein, described first surface comprises a plurality of micro-structurals.
Aforesaid LGP, wherein, described second surface has at least one micro-structural.
Aforesaid LGP, wherein, described micro-structural has a long axis direction, and described long axis direction is vertical with a long axis direction of described light incident sides.
Aforesaid LGP, wherein, described micro-structural has a long axis direction, and described long axis direction is parallel with a long axis direction of described light incident sides.
A kind of backlight module of the present invention comprises a light source; An and LGP.LGP comprises a body and a plurality of site.Body has a light incident sides and the relative second surface that is provided with at described first surface with of a first surface, and the light source neighbour is located at light incident sides, and first surface is a matsurface.The site is arranged on first surface, and described site near the density of light incident sides greater than density away from light incident sides.
Aforesaid backlight module, wherein, the described site on the described LGP is extremely dredged by close from the density of another extremely relative light incident sides of described light incident sides.
Aforesaid backlight module, wherein, the roughness of described matsurface is between 0.5～20 μ m.
Aforesaid backlight module, wherein, described first surface comprises a plurality of micro-structurals.
Aforesaid backlight module, wherein, described second surface has at least one micro-structural.
Aforesaid backlight module, wherein, described micro-structural has a long axis direction, and described long axis direction is vertical with a long axis direction of described light incident sides.
Aforesaid backlight module, wherein, described micro-structural has a long axis direction, and described long axis direction is parallel with a long axis direction of described light incident sides.
A kind of liquid crystal indicator of the present invention comprises a display panels and a backlight module, and itself and display panels are oppositely arranged.Backlight module comprises a light source and a LGP.LGP comprises a body and a plurality of site.Body has a light incident sides and the relative second surface that is provided with at described first surface with of a first surface, and the light source neighbour is located at light incident sides, and first surface is a matsurface.The site is arranged on first surface, and described site near the density of light incident sides greater than density away from light incident sides.
Aforesaid liquid crystal indicator, wherein, the roughness of described matsurface is between 0.5～20 μ m.
By technique scheme, LGP of the present invention, backlight module and liquid crystal indicator have following advantage at least:
After on the matsurface of LGP a plurality of sites being set, described site can part planarization matsurface, and then increases light that the zone that the site is provided with is arranged carries out total reflection in LGP degree.Therefore, by the density that the site is provided with, can adjust the amount of light at the LGP inner full-reflection.In the present invention, the site near the density of light incident sides greater than density away from light incident sides, so the more ， of the light total reflection in the zone of close light incident sides Er Yuan is less from the light total reflection in the zone of light incident sides, and then reach uniform bright dipping.So, by being equipped with of matsurface and site, can reduce light in LGP loss and increase light extraction efficiency, even can reduce the cost that needs other blooming piece of buying.
Description of drawings
Fig. 1 is a kind of schematic diagram of known LGP;
Fig. 2 and Fig. 3 are the schematic diagrames of the LGP of first embodiment of the invention;
Fig. 4 to Fig. 6 is the schematic diagram of different aspects of the LGP of second embodiment of the invention;
Fig. 7 A and Fig. 7 B are the schematic diagrames that LGP of the present invention has different micro-structurals;
Fig. 8 is the schematic flow sheet of the manufacturing method of light conducting board of the preferred embodiment of the present invention;
Fig. 9 is the schematic diagram of the backlight module of the preferred embodiment of the present invention; And
Figure 10 is the schematic diagram of the liquid crystal indicator of the preferred embodiment of the present invention.
The main element symbol description:
1,2,2a, 2b, 2c, 2d, 3: LGP
11,211,311: light incident sides
12: reflecting surface
13: exiting surface
14,22,32: the site
21,21a, 21b, 31: body
212,312: first surface
213,213a, 213b, 213c, 213d, 313: second surface
215: another light incident sides
4: backlight module
41, L: light source
42: reflector
43: reflector plate
44: optical diaphragm group
5: display panels
6: liquid crystal indicator
MS: micro-structural
S01, S02: the step of manufacturing method of light conducting board
The specific embodiment
Hereinafter with reference to correlative type, a kind of LGP, backlight module and the liquid crystal indicator of the preferred embodiment of the present invention is described, wherein identical assembly will be illustrated with identical symbol.
First embodiment
Please refer to Fig. 2 and shown in Figure 3, wherein Fig. 2 is the schematic perspective view of the LGP 2 of present embodiment, and Fig. 3 is the generalized section of LGP 2.Present embodiment does not also limit the range of application of LGP 2, and it can be applicable to general backlight module, for example is the backlight module of lighting device, advertising lamp box, medical lamp box or liquid crystal indicator.
LGP 2 comprises a body 21 and a plurality of site 22.Body 21 has at least one light incident sides, and wherein a light incident sides is the relative second surface 213 that is provided with at described first surface with of a light incident sides 211 and a first surface 212 in an embodiment of the present invention.Body 21 can for example be rectangle or wedge shape or other geometry, and at this, body 21 is an example with rectangle.One light source L can the neighbour be located at light incident sides 211, and the light that light source L is sent enters LGP 2 by light incident sides 211.First surface 212 and second surface 213 one of them can be used as exiting surface at least, at this, be example with first surface 212 as exiting surface, and second surface 213 is bottom surfaces.
Site 22 is arranged on first surface 212, and described site 22 near the density of light incident sides 211 greater than density away from light incident sides 211, that is to say, site 22 in first surface 212 unit ares distributes, can be in quantity greater than quantity away from light incident sides 211 near light incident sides 211, in addition, better, the described site 22 on the LGP 2 from light incident sides 211 density to another relative light incident sides 215 by close to dredging.In the present embodiment, it is smooth having the zone of site 22 can make the zone of matsurface become, and increasing the chance of light in body 21 inner total reflections of LGP 2, the destruction of light in body 21 inner total reflections of LGP 2 then can be caused by matsurface in the zone of no site 22.And, the site 22 of present embodiment near the density of light incident sides 211 greater than density, so when light was incident upon close light incident sides 211 regional, it was more to carry out total reflection away from light incident sides 211; And light She Zhi Yuan is when light incident sides 211 regional, and total reflection is damaged, so it is more to penetrate the body 21 of LGP 2.Thus, can make light can form uniform surface light source when penetrating LGP 2 by suitably distributing the distribution of site 22 at first surface 212.In the present embodiment, site 22 can be ultraviolet optical cement or heat-curable glue, solidifies by ultraviolet light or heat respectively.Site 22 also can comprise a filler, and filler can comprise titanium oxide (TiO2) and/or silica (SiO2) and/or polymethyl methacrylate (PMMA) particle.
Second embodiment
Please refer to shown in Figure 4, the schematic perspective view of the LGP 2a of present embodiment.Different with the LGP 2 of first embodiment is that the second surface 213a of LGP 2a has at least one micro-structural (micro-structure) MS, is example at this with a plurality of micro-structurals.Micro-structural MS can comprise prism (prism), vee-cut (V-cut) or lenticule (micro-lens) or biconvex lens (lenticular) or its combination, at this being example near the biconvex lens that is arranged in parallel mutually.In addition, described micro-structural MS, also can be spaced, shown in Fig. 7 A near being arranged in parallel except mutually, the micro-structural MS that shows second surface 213c is that a plurality of lenticules are provided with at interval, and Fig. 7 B shows that then the micro-structural MS of second surface 213d is that vee-cut is provided with at interval.
Referring again to shown in Figure 4, micro-structural MS has a long axis direction, and long axis direction is vertical with a long axis direction of light incident sides 211 (or light source L), has the effect that light is concentrated on the vertical angle of view whereby.In addition, Fig. 5 and Fig. 6 show the LGP 2b of another aspect, its micro-structural MS has a long axis direction, and long axis direction is parallel with a long axis direction of light incident sides 211 (or light source L), by micro-structural MS, light can be done the change of optical characteristics, and reduce the loss of light in LGP 2a～2d, and be lifted out optical efficiency.
Below, please refer to relevant indicators, with the embodiment of a kind of manufacturing method of light conducting board of explanation the present invention.
Please refer to shown in Figure 8ly, the method for manufacturing light guide plate of the preferred embodiment of the present invention comprises step S01 and S02.Please be simultaneously with reference to Fig. 2 and shown in Figure 3, step S01 forms the first surface 212 of a matsurface at the body 21 of a LGP 2, and body 21 also has at least one light incident sides.Step S02 is provided with a plurality of sites 22 on first surface 212, and described site 22 is extremely dredged by close from the density of extremely relative described another light incident sides of a described light incident sides.Because the technical characterictic of the structure division that step S01 and S02 are included describes in detail at the foregoing description, so do not repeat them here.In the present embodiment, matsurface can or be carved by sandblast or grinding or roller and form.Described site 22 can or be coated with by printing or ink-jet and form.
Please refer to Fig. 5 and shown in Figure 6, manufacturing method of light conducting board also can comprise at least one micro-structural MS of formation on the second surface 213b of body 21b, and second surface 213b and first surface 212 are oppositely arranged.In the present embodiment, micro-structural MS can form by roll extrusion.
Please refer to shown in Figure 9ly, a kind of backlight module 4 of the preferred embodiment of the present invention comprises a light source 41 and a LGP 3.In the present embodiment, backlight module 4 can be used as general illumination device, lamp box or backlight, at this being example as backlight.Light source 41 can be any illuminator, and for example hot-cathode fluorescent lamp (HCFL) or cold-cathode fluorescence lamp (CCFL) or light emitting diode (LED) are example with the cold-cathode fluorescence lamp in this.Light source 41 neighbours are located at the light incident sides 311 of LGP 3.The technical characterictic of LGP 3 has been chatted bright at the foregoing description, so do not repeat them here.In addition, backlight module 4 also can comprise a reflector 42, coat light source 41 to the small part periphery, in order to the light of reflection source 41, with the light incident LGP 3 of guiding light source 41.
Please refer to shown in Figure 10ly, a kind of liquid crystal indicator 6 of the preferred embodiment of the present invention comprises a display panels 5 and a backlight module 4, and 3 of LGPs are at backlight module 4.Display panels 5 is oppositely arranged with backlight module 4.Backlight module 4 is as backlight module, and can comprise that also a reflector plate 43 neighbours are located at the second surface 313 of LGP 3, in order to light again in the reflected back LGP 3.Backlight module 4 also can comprise an optical diaphragm group 44, and the neighbour is located at the first surface 312 of LGP 3, and in order to adjust the optical property of light, optical diaphragm group 44 can comprise diffusion sheet, diffusion sheet, brightness enhancement film or its combination etc. down.
In sum, in LGP of the present invention, backlight module, the Liquid crystal disply device and its preparation method, matsurface is in order to destroy the total reflection of light in LGP, so after on the matsurface of LGP a plurality of sites being set, described site can part planarization matsurface, and then increases light that the zone that the site is provided with is arranged carries out total reflection in LGP degree.Therefore, by the density that the site is provided with, can adjust the amount of light at the LGP inner full-reflection.In the present invention, the site near the density of light incident sides greater than density away from light incident sides, so the more ， of the light total reflection in the zone of close light incident sides Er Yuan is less from the light total reflection in the zone of light incident sides, and then reach uniform bright dipping.In addition, by being equipped with of matsurface and site, can reduce light in LGP loss and increase light extraction efficiency, even can reduce the cost that needs other blooming piece of buying.
The above only is an illustrative, but not is restricted person.Anyly do not break away from spirit of the present invention and category, and, all should be included in the claim institute restricted portion its equivalent modifications of carrying out or change.
Claims (16)
1. a LGP is characterized in that, comprising:
One body has a light incident sides and a first surface and a second surface with respect to described first surface setting, and described first surface is a matsurface; And
A plurality of sites are arranged on described first surface, and described site near the density of described light incident sides greater than density away from described light incident sides.
2. LGP according to claim 1 is characterized in that, the described site on the described LGP is extremely dredged by close from the density of another extremely relative light incident sides of described light incident sides.
3. LGP according to claim 1 is characterized in that, the roughness of described matsurface is between 0.5～20 μ m.
4. LGP according to claim 1 is characterized in that described first surface comprises a plurality of micro-structurals.
5. LGP according to claim 1 is characterized in that described second surface has at least one micro-structural.
6. LGP according to claim 5 is characterized in that described micro-structural has a long axis direction, and described long axis direction is vertical with a long axis direction of described light incident sides.
7. LGP according to claim 5 is characterized in that described micro-structural has a long axis direction, and described long axis direction is parallel with a long axis direction of described light incident sides.
8. a backlight module is characterized in that, comprising:
One light source; And
One LGP comprises:
One body has a light incident sides and a first surface and a second surface with respect to described first surface setting, and described light source is adjacent to described light incident sides, and described first surface is a matsurface; And
A plurality of sites are arranged on described first surface, and described site near the density of described light incident sides greater than density away from described light incident sides.
9. backlight module according to claim 8 is characterized in that, the described site on the described LGP is extremely dredged by close from the density of another extremely relative light incident sides of described light incident sides.
10. backlight module according to claim 8 is characterized in that, the roughness of described matsurface is between 0.5～20 μ m.
11. backlight module according to claim 8 is characterized in that, described first surface comprises a plurality of micro-structurals.
12. backlight module according to claim 8 is characterized in that, described second surface has at least one micro-structural.
13. backlight module according to claim 12 is characterized in that, described micro-structural has a long axis direction, and described long axis direction is vertical with a long axis direction of described light incident sides.
14. backlight module according to claim 12 is characterized in that, described micro-structural has a long axis direction, and described long axis direction is parallel with a long axis direction of described light incident sides.
15. a liquid crystal indicator is characterized in that, comprising:
One display panels; And
One backlight module is oppositely arranged with described display panels, and comprises:
One light source; And
One LGP comprises:
One body has a light incident sides and a first surface and a second surface with respect to described first surface setting, and described light source neighbour is located at described light incident sides, and described first surface is a matsurface; And
A plurality of sites are arranged on described first surface, and described site near the density of described light incident sides greater than density away from described light incident sides.
16. liquid crystal indicator according to claim 15 is characterized in that, the roughness of described matsurface is between 0.5～20 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010100016482A CN102128415A (en) | 2010-01-19 | 2010-01-19 | Light guide plate, backlight module and liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010100016482A CN102128415A (en) | 2010-01-19 | 2010-01-19 | Light guide plate, backlight module and liquid crystal display device |
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| Publication Number | Publication Date |
|---|---|
| CN102128415A true CN102128415A (en) | 2011-07-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010100016482A Pending CN102128415A (en) | 2010-01-19 | 2010-01-19 | Light guide plate, backlight module and liquid crystal display device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103185912A (en) * | 2011-12-29 | 2013-07-03 | 奇美实业股份有限公司 | Microstructure light guide plate and side light type backlight module |
| WO2013135054A1 (en) * | 2012-03-12 | 2013-09-19 | 京东方科技集团股份有限公司 | Color deviation balance thin film, side-type backlight module and liquid crystal display device |
| CN103471037A (en) * | 2013-09-09 | 2013-12-25 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display device comprising same |
| CN104375236A (en) * | 2014-11-26 | 2015-02-25 | 深圳市华星光电技术有限公司 | Light guide plate, backlight module and display |
| CN105022186A (en) * | 2014-04-23 | 2015-11-04 | 群创光电股份有限公司 | Display device and processing machine bench for same |
| CN105511009A (en) * | 2015-12-22 | 2016-04-20 | 武汉华星光电技术有限公司 | Light guide plate, backlight module and liquid crystal display |
| WO2017020353A1 (en) * | 2015-07-31 | 2017-02-09 | 深圳市华星光电技术有限公司 | Light guide plate, backlight module and display device |
-
2010
- 2010-01-19 CN CN2010100016482A patent/CN102128415A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103185912A (en) * | 2011-12-29 | 2013-07-03 | 奇美实业股份有限公司 | Microstructure light guide plate and side light type backlight module |
| CN103185912B (en) * | 2011-12-29 | 2014-12-24 | 奇美实业股份有限公司 | Microstructure light guide plate and side light type backlight module |
| WO2013135054A1 (en) * | 2012-03-12 | 2013-09-19 | 京东方科技集团股份有限公司 | Color deviation balance thin film, side-type backlight module and liquid crystal display device |
| US9291766B2 (en) | 2012-03-12 | 2016-03-22 | Boe Technology Group Co., Ltd. | Color deviation balance thin film, side-type backlight module and liquid crystal display device |
| CN103471037A (en) * | 2013-09-09 | 2013-12-25 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display device comprising same |
| CN105022186A (en) * | 2014-04-23 | 2015-11-04 | 群创光电股份有限公司 | Display device and processing machine bench for same |
| CN104375236A (en) * | 2014-11-26 | 2015-02-25 | 深圳市华星光电技术有限公司 | Light guide plate, backlight module and display |
| WO2017020353A1 (en) * | 2015-07-31 | 2017-02-09 | 深圳市华星光电技术有限公司 | Light guide plate, backlight module and display device |
| CN105511009A (en) * | 2015-12-22 | 2016-04-20 | 武汉华星光电技术有限公司 | Light guide plate, backlight module and liquid crystal display |
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Application publication date: 20110720 |