CN103343923A - Backlight module and liquid crystal display device with backlight module - Google Patents
Backlight module and liquid crystal display device with backlight module Download PDFInfo
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- CN103343923A CN103343923A CN2013102910327A CN201310291032A CN103343923A CN 103343923 A CN103343923 A CN 103343923A CN 2013102910327 A CN2013102910327 A CN 2013102910327A CN 201310291032 A CN201310291032 A CN 201310291032A CN 103343923 A CN103343923 A CN 103343923A
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Abstract
The invention belongs to the technical field of liquid crystal displaying, and particularly relates to a backlight module. The backlight module comprises a light guiding plate and a light source, wherein the light source is arranged on the side of the light inlet face of the light guiding plate. The backlight module further comprises a reflection device, wherein the position of the reflection device can be adjusted, the reflection face of the reflection device and the light-emitting face of the light source are oppositely arranged, and the reflection device can be adjusted to enable incidence angles of light on the light inlet face to be equal and acute angles. The problems that light emitted by an LED lamp in the prior art is insufficient in light mixing in a narrow-border space, and two adjacent LED lamps have luminance differences or color differences so that the uneven luminance phenomenon is formed are solved, the light mixing distance of the reflection device is shortened within the narrow-border scope, the size of the backlight module is reduced, the manufacturing cost of the backlight module is reduced, the product structure is optimized, and the market competitive rate of products is promoted. By means of the backlight module and a liquid crystal display device with the backlight module, the problems that, in the narrow-border process of the backlight module, light-and-shade alternated lamp shades are easily caused, or the light easily leaks from the borders at the periphery, or bright borders are easily caused are solved, and the market competitiveness of the liquid crystal display device is improved.
Description
Technical field
The invention belongs to technical field of liquid crystal display, relate in particular to module backlight and liquid crystal indicator thereof.
Background technology
Liquid crystal indicator has that fuselage is thin, power saving, numerous advantages such as radiationless, be widely used, in the side entrance back module, it is a side of light source led lamp bar being located at the LGP incidence surface, the light that LED lamp bar sends enters in the LGP from incidence surface, penetrate from the LGP exiting surface through reflection and diffusion, offer liquid crystal panel through optical diaphragm group to form area source again.
Current market trend is the narrow frameization of module backlight, narrow frame causes the distance between LED lamp and the LGP incidence surface more and more littler, and then cause light that the LED lamp sends mixed light deficiency spatially, thereby, the difference that presents brightness or color between adjacent two LED lamp, form bright dark uneven phenomenon, in addition, because the structural design of narrow frame causes the light that is radiated on the incidence surface phenomenons such as light leak to occur.How realizing the even mixing of light between the LED lamp and can not produce light leakage phenomena in the frame scope of narrow frame is a very stubborn problem.
Summary of the invention
The object of the present invention is to provide module backlight, be intended to solve the problem that the light of how realizing between the LED lamp evenly mixes and avoid light leak in the frame scope of narrow frame.
The present invention realizes like this, module backlight, comprise LGP and light source, described light source is arranged at incidence surface one side of described LGP, the reflection unit that also comprises position-adjustable, the reflecting surface of described reflection unit and the light-emitting area of described light source are oppositely arranged, and regulate described reflection unit so that the incidence angle of described light on described incidence surface equates and be acute angle.
Further, the incidence surface of described LGP is vertically to arrange, and regulates described reflection unit and makes described light tilt evenly to inject in the described incidence surface.
Particularly, the incidence surface of described LGP is regulated described reflection unit described light level is evenly injected in the described incidence surface for being obliquely installed.
Preferably, the inclination angle of described incidence surface is α and 80 °≤α＜90 °.
Further, described incidence surface surface is provided with microstructure.
Preferably, described microstructure is the concave point of a plurality of regularly arranged or irregular alignments.
Particularly, described reflection unit is for regulating the reflector plate of its setting angle, and described reflecting surface is coated with reflectance coating.
Preferably, described reflecting surface is arcwall face.
Further, described reflecting surface smooth surface.
Another object of the present invention is to provide liquid crystal indicator, adopt above-mentioned module backlight.
The beneficial effect of module backlight provided by the invention is: with the reflecting surface of the reflection unit light-emitting area over against light source, the position of accommodation reflex device, the light that light source is sent evenly reflexes on the incidence surface of LGP, realize that in the frame scope of narrow frame the light between the LED lamp evenly mixes, shorten light mixing distance, reduce module size backlight, reduce the cost of manufacture of module backlight, optimize product structure, solved the light that the LED lamp sends in prior art mixed light deficiency in narrow frame space, the difference that presents brightness or color between adjacent two LED lamp, form bright dark uneven phenomenon, in addition, the incidence angle of light on incidence surface that reflects through reflection unit is acute angle, according to the refraction principle of light as can be known, when light is slanted through another kind of medium from a kind of medium, deviation takes place in the direction of propagation, refract light is full of whole LGP, and secondary reflection takes place in the frame place at LGP, therefore near frame, can not form very strong display defects such as bright line, improve the phenomenon of LGP luminance nonuniformity, simultaneously, be provided with microstructure at incidence surface, this microstructure can make light after incidence surface reflects, change the direction of propagation of light, inject in the LGP with divergent shape, light after the refraction is full of whole LGP inside, eliminate the too high problem of LGP local luminance, the light that makes entire aphototropism mould send is evenly soft, adopt the liquid crystal indicator of above-mentioned module backlight, eliminate module backlight and in narrow frame process, be prone to light and dark lamp shadow or frame light leak all around, problems such as bright border.
Description of drawings
Fig. 1 is the module floor map backlight that first embodiment of the invention provides;
Fig. 2 is the local enlarged diagram at A place among Fig. 1;
Fig. 3 is the floor map of the module backlight that provides of second embodiment of the invention.
The specific embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the present invention, and be not used in restriction the present invention.
See also Fig. 1 and Fig. 2, the module backlight 1 that first embodiment of the invention provides, comprise LGP 11 and light source 12, the reflection unit 13 that also comprises position-adjustable, the reflecting surface 131 of reflection unit 13 is oppositely arranged with the light-emitting area 121 of light source 12, accommodation reflex device 13 is so that the incidence angle of light on incidence surface 111 equates and be acute angle, according to the operation principle of side entrance back module as can be known, light source 12 is arranged on a side of incidence surface 111, the light that light source 12 sends exposes in the LGP 11 via reflection unit 13, in the present embodiment, reflection unit 13 receives the light that light source 12 sends, and at reflecting surface 131 generation reflection of lights, change in the existing module 1 backlight, the light direct irradiation incidence surface 111 that light source 12 sends, enter the inside of LGP 111, produce defectives such as bright line at the frame place of module 1 backlight easily, light is radiated on the reflecting surface 131, reflection of light takes place, in reflection process, realization light mixes, the emergent ray light intensity is more even, the principle analysis that module backlight 1 is produced lamp shadow as can be known, because the light intensity difference of the luminous all angles of LED, the intermediate angle light intensity is bigger, the difference that presents brightness or color between adjacent two LED lamp, therefore form bright dark uneven phenomenon, therefore, the module backlight 1 that present embodiment provides is implemented in realizes in the frame scope of narrow frame that the light between the LED lamp evenly mixes, eliminate display defects such as lamp shadow, the position of reflection unit 13 can manual adjustments, so that light tilts evenly to be incident upon on the incidence surface 111, reflection ray is radiated on the incidence surface 111 with collimated light beam, guarantee that namely the incidence angle on the incidence surface 111 is identical, according to the refraction principle of light as can be known, when light is slanted through another kind of medium from a kind of medium, deviation takes place in the direction of propagation, the light that deviation takes place exposes to the inside of LGP 11 with identical refraction angle, refract light is carrying out secondary reflection in LGP 11, and then improve the phenomenon of LGP 11 luminance nonuniformities, avoid the inside of light direct projection LGP 11 to produce light leakage phenomena such as frame bright line, the light-emitting area 121 that 13 reflectings surface of putting 131 and light source 12 are adorned in reflection is oppositely arranged, and better accepts the reflection of the concurrent third contact of a total solar or lunar eclipse of light that light source 12 sends.
See also Fig. 1, in the present embodiment, the inclination angle of incidence surface 111 is α and 80 °≤α＜90 °, be that LGP 11 scopes of cutting are 0～10 °, particularly, the inclination angle of incidence surface 111 can be set according to the light that emitter 13 reflects, and the light that assurance emitter 13 reflects all arrives the inside of LGP 11, simultaneously, avoid irradiation light at incidence surface 111 total reflection phenomenon to take place, accommodation reflex device 13, so that the emergent ray along continuous straight runs exposes to incidence surface 111 places, cut angle as can be known according to LGP 11, the incidence angle of light on incidence surface 111 is the inclination angle, the light that light source 12 sends exposes on the reflecting surface 131 of reflection unit 13, the reflection unit of setting up 13 can incidence angle is different light be adjusted to collimated light beam after reflection, reflect at incidence surface 111 with identical incidence angle, light after the refraction is radiated on the incidence surface 11, Secondary Emission takes place in the inside at LGP 11, be full of the inside of LGP 11, thereby avoid forming very strong light leakage phenomena such as bright line near the frame, improve the phenomenon of LGP 11 luminance nonuniformities, cutting in the process LGP 11, the assurance section is smooth, and it is unsuitable excessive to cut angle, otherwise the light after the refraction can't be full of the inside of module 1 backlight.
See also Fig. 1, in the present embodiment, the angle of inclination of incidence surface 111 is 80 °, expose to light generation deviation on the incidence surface 111 by reflection unit 13 light reflected along continuous straight runs, because the inclination angle of incidence surface 111 is acute angle, after refracted ray can arrive the edge of LGP 11, can this secondary reflection take place again, make that LGP 11 inner brightness are more even, avoid occurring defectives such as lamp shadow.
See also Fig. 1, in the present embodiment, reflecting surface 131 is arcwall face, reflecting surface 131 is over against the light-emitting area 121 of light source 12, reflecting surface 131 receives the light that light source 12 sends, reflecting surface 131 is designed to arc, reflecting surface 131 can realize farthest accepting the light that light source 12 sends, light is radiated on the reflecting surface 131, light reflected is mixed more even, be implemented in that the light between the LED lamp evenly mixes in the frame scope of narrow frame, solve light mixed light deficiency in narrow frame space that the LED lamp sends in the prior art, the difference that presents brightness or color between adjacent two LED lamp, form bright dark uneven phenomenon, and, at reflection unit 12 light reflected takes place be radiated on the incidence surface 111 with collimated light beam, assurance light uniform irradiation avoids occurring the display defects such as appearance lamp shadow of LGP 11 to LGP 11.According to shape facility, reflecting surface 131 has the degree of depth and curvature, concrete, suppose that certain light and horizontal direction angle that light source 12 sends are θ, so the curvature of reflecting surface 131 is tan (90 °-θ/2), light via reflecting surface 131 reflections after, become horizontal direction, enter in the LGP 111, though provide reflecting surface 131 to be arc in the present embodiment, the shape that can accept the light function to greatest extent that designs other according to this all can.
See also Fig. 1 and Fig. 2, in the present embodiment, the surface of incidence surface 111 is provided with microstructure 110, reflection ray reflects on the surface of low-light structure 110, change emergent ray at the refraction angle at incidence surface 111 places, because the refraction angle difference, then the light after the refraction is full of the inside of whole LGP 11, eliminates the defective of LGP 11 inner brightness disproportionations.
See also Fig. 2, in the present embodiment, microstructure 110 is the concave point of a plurality of regularly arranged or irregular alignments, and according to the law of refraction, light is radiated on the concave point surface with same incidence angle, deviation takes place at the concave point place, because the shape of concave point can arrange arbitrarily, the refraction angle is different, therefore in the light directive LGP 11 after the refraction everywhere, be full of whole LGP 11 inside, can the designing according to the size of LGP 11 of the shape of concave point, quantity and density.
In the present embodiment, reflection unit 13 is for regulating the reflector plate of its setting angle, can realize by adjustment structure, be connected by screw with the backboard that is used for the installation reflector plate as reflector plate, adjust the setting angle of reflector plate on backboard, by nut reflector plate is locked again, perhaps, one turning rack is installed between reflector plate and backboard, reflector plate is fixedly mounted on the turning rack, by adjusting the setting angle of turning rack, realizes adjusting the setting angle of reflector plate, reflector plate receives the light that light source 12 sends, and at reflecting surface 131 reflection of light takes place.Reflector plate is formed by producing the slide that reflects by its back side, slide has a front of partially or completely being made up of a plurality of composite surfaces, each composite surface is all served as reasons only to the face of cylinder that a direction tilts and curved surface or the plane composition that tilts to opposite direction, above-mentioned composite surface or continuous or be inserted with the plane therebetween, and its structure is most of area that the face of cylinder accounts for composite surface, and above-mentioned slide also has one by a plurality of back sides that constitute in abutting connection with right-angle prism, reflector plate is easy to use, and install simple, be convenient to implement, simultaneously, be coated with reflectance coating on the reflecting surface 131, be used for the light that reflection source 12 sends, for example aluminium film or copper film, the light that makes light source 12 send reflexes to incidence surface 111 places fully after reflecting surface 131 mixes, at this moment, the inside of LGP 11 no longer includes lamp shadow and produces, and guarantees that namely light evenly penetrates from the exiting surface (not shown) of LGP 11, improves the brightness of module 1 backlight.
Further, the smooth surface of reflecting surface 131 guarantees that the light that is sent by light source 12 is radiated on the reflecting surface 131, the diffuse reflection phenomenon can not take place, and light can all reflex on the incidence surface 111, guarantees light intensity.
Further, see also Fig. 3, the module backlight 1 that the module backlight 2 that second embodiment of the invention provides and first embodiment provide is roughly the same, its difference is: the incidence surface 211a of LGP 21a is for vertically arranging, accommodation reflex device 23a makes light tilt evenly to be incident upon on the incidence surface 211a, accommodation reflex device 23a, after the light that light source 22a sends is radiated at reflecting surface 231a and reflects, change the direction of propagation of light, with the collimated light beam oblique illumination on incidence surface 211a, refraction principle according to light, when light is slanted through another kind of medium from a kind of medium, deviation takes place in the direction of propagation, and the light that deviation takes place enters the inside of LGP 21a, changes in the existing module backlight, the inside of light direct projection LGP 21a produces light leakage phenomena such as frame bright line, and the light after the refraction is more prone to carry out secondary reflection in LGP 21a, and then improves the phenomenon of LGP 21a luminance nonuniformity, avoids the inside of light direct projection LGP 21a to produce light leakage phenomena such as frame bright line simultaneously.
Another purpose of the embodiment of the invention is to provide liquid crystal indicator, adopts module 1(2 backlight), avoid module 1(2 backlight) in narrow frame process, be prone to light and dark lamp shadow or problems such as frame light leak, bright border all around, improve its market competitiveness.
The above only is preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. module backlight, comprise LGP and light source, described light source is arranged at incidence surface one side of described LGP, it is characterized in that: the reflection unit that also comprises position-adjustable, the reflecting surface of described reflection unit and the light-emitting area of described light source are oppositely arranged, and regulate described reflection unit so that the incidence angle of described light on described incidence surface equates and be acute angle.
2. module backlight as claimed in claim 1 is characterized in that: the incidence surface of described LGP is regulated described reflection unit and is made described light tilt evenly to inject in the described incidence surface for vertically arranging.
3. module backlight as claimed in claim 1, it is characterized in that: the incidence surface of described LGP is regulated described reflection unit described light level is evenly injected in the described incidence surface for being obliquely installed.
4. module backlight as claimed in claim 3 is characterized in that: the inclination angle of described incidence surface is α and 80 °≤α＜90 °.
5. as claim 2 or 3 described modules backlight, it is characterized in that: described incidence surface surface is provided with microstructure.
6. module backlight as claimed in claim 5 is characterized in that: described microstructure is the concave point of a plurality of regularly arranged or irregular alignments.
7. module backlight as claimed in claim 1 is characterized in that: described reflection unit is for regulating the reflector plate of its setting angle, and described reflecting surface is coated with reflectance coating.
8. module backlight as claimed in claim 7, it is characterized in that: described reflecting surface is arcwall face.
9. module backlight as claimed in claim 8 is characterized in that: described reflecting surface smooth surface.
10. liquid crystal indicator is characterized in that: comprise as each described module backlight in the claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2013102910327A CN103343923A (en) | 2013-07-11 | 2013-07-11 | Backlight module and liquid crystal display device with backlight module |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013102910327A CN103343923A (en) | 2013-07-11 | 2013-07-11 | Backlight module and liquid crystal display device with backlight module |
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| CN103343923A true CN103343923A (en) | 2013-10-09 |
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| CN2013102910327A Pending CN103343923A (en) | 2013-07-11 | 2013-07-11 | Backlight module and liquid crystal display device with backlight module |
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| CN103955092A (en) * | 2014-04-15 | 2014-07-30 | 京东方科技集团股份有限公司 | Backlight module and display panel |
| CN114755752A (en) * | 2022-04-14 | 2022-07-15 | 武汉华星光电技术有限公司 | Backlight module |
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| CN101865376A (en) * | 2010-04-21 | 2010-10-20 | 友达光电股份有限公司 | Backlight module, display and manufacturing method of reflecting cover of backlight module |
| CN201652190U (en) * | 2010-05-13 | 2010-11-24 | 北京京东方光电科技有限公司 | Light guide plate and backlight module |
| CN102213386A (en) * | 2011-06-08 | 2011-10-12 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103955092A (en) * | 2014-04-15 | 2014-07-30 | 京东方科技集团股份有限公司 | Backlight module and display panel |
| CN114755752A (en) * | 2022-04-14 | 2022-07-15 | 武汉华星光电技术有限公司 | Backlight module |
| CN114755752B (en) * | 2022-04-14 | 2023-11-28 | 武汉华星光电技术有限公司 | Backlight module |
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Application publication date: 20131009 |