CN102798043A - Direct-lighting type backlight module - Google Patents
Direct-lighting type backlight module Download PDFInfo
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- CN102798043A CN102798043A CN2012102731286A CN201210273128A CN102798043A CN 102798043 A CN102798043 A CN 102798043A CN 2012102731286 A CN2012102731286 A CN 2012102731286A CN 201210273128 A CN201210273128 A CN 201210273128A CN 102798043 A CN102798043 A CN 102798043A
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- aphototropism mode
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Abstract
The invention provides a direct-lighting type backlight module which comprises a back plate, a reflector plate, a plurality of light sources, a grid layer and an optical sheet, wherein one end of the reflector plate is connected with the periphery of the back plate so as to form a containing cavity with the back plate; the plurality of light sources and the grid layer are positioned in the containing cavity; the optical sheet is supported at the other end of the reflector plate and covers the containing cavity; the outer surface of the grid layer is a reflecting plane; the grid layer comprises a plurality of diaphragm plates and a plurality of longitudinal diaphragms which are arranged in a criss-cross way to form a plurality of containing squares; and each light source is positioned in one corresponding containing square. According to the direct-lighting type backlight module, since the grid layer changes the light, the light is only transmitted at a lightened part and only few light is diffused to a light source turn-off part, so that a 3D display effect can be enhanced and a 2D display effect is not influenced.
Description
Technical field
The invention relates to field of liquid crystal display, and particularly about a kind of down straight aphototropism mode set that is used for liquid crystal indicator.
Background technology
The principle of fast gate-type (Shutter Glass) 3D technology is according to human eye the refresh time of image frequency to be realized; Through improving the quick refresh rate (will reach 120Hz at least) of picture; Left eye and right eye each with the refreshing image fast and just can let the people can not produce shake sense of 60Hz to image, and the maintenance frame number identical with the 2D video, two eyes of spectators are seen the different pictures of quick switching; And in brain, produce illusion, just watch stereopsis.
Because liquid crystal scanning is carried out line by line, and remain to after having scanned when next field signal sends over always and just change.Therefore, if do not add control, get some time points to backlight; The image that we see be that a last field picture and next field picture are seen simultaneously all the time, and 3D requires some time points; Can only see one image, for example left-eye image or eye image are crosstalked with reduction.Therefore, need ask to be used for illumination from said certain time point to liquid crystal that provide the down straight aphototropism mode set of illumination can close respective regions at, make said zone be black, eyes can only be seen a complete image like this.
But, in the present down straight aphototropism mode set, generally adopt the structure of straight-down negative lamp bar, usually, there is not barrier between lamp bar and the lamp bar, light can freely be propagated.Even only open a street lamp pipe; Light also can propagate into whole zone; That is to say at said certain time point and close the illumination of respective regions and keep under the situation that other light source opens that the light source of these unlatchings can scatter to said zone with most of light, thus the black effect of influence; And then influence the 3D display effect, even can't realize the 3D display effect.
Summary of the invention
To the problems referred to above, the purpose of this invention is to provide a kind of down straight aphototropism mode set that can overcome the problems referred to above.
A kind of down straight aphototropism mode set comprises: backboard, reflector plate, a plurality of light source, grid layer and blooming piece; One end of said reflector plate is connected with the periphery of said backboard and said backboard forms containing cavity; Said a plurality of light source and said grid layer are positioned at said containing cavity; Said blooming piece is carried on the other end of said reflector plate and covers said containing cavity; The outer surface of said grid layer is a reflecting surface, and said grid layer comprises that a plurality of diaphragm plates and crisscross setting of a plurality of midfeather form a plurality of ccontaining grids, and each said light source is positioned at a ccontaining grid corresponding with it.
In one embodiment of the invention, said a plurality of light source is light emitting diode.
In one embodiment of the invention, the rising angle of said a plurality of light sources is θ, θ>pi/2.
In one embodiment of the invention, the light-emitting area of said light source and said blooming piece are H near the distance of said light source one side, are A along the distance between the center of two light sources of the adjacent arrangement of first direction in said a plurality of light sources; Be B along the distance between the center of two light sources of the adjacent arrangement of first direction in said a plurality of light source, said ccontaining grid is a along the width of said first direction, and said ccontaining grid is b along the width of said second direction; A=A, b=B, H>1.1A; If A>B; Then < < if H is A < B, then 0.5Bcot (θ/>2) < h < H for h for 0.5Acot (θ/>2).
In one embodiment of the invention, said diaphragm plate and said midfeather comprise that the said reflecting layer of support covers said support.
In one embodiment of the invention, the material in said reflecting layer is the long reflectivity of all-wave greater than 75% reflecting material.
In one embodiment of the invention, said grid layer is formed greater than the direct injection moulding of 75% reflecting material by the long reflectivity of all-wave.
In one embodiment of the invention, the outer surface of said grid layer is through polishing or electroplating processes.
In one embodiment of the invention, said reflector plate and said back shaped meeting at right angles or the obtuse angle.
In one embodiment of the invention, said blooming piece is one or more the combination in diffusion sheet, prismatic lens, the brightness enhancement film.
With respect to prior art, adopt down straight aphototropism mode set of the present invention, receive the change of grid layer to light, light only in a bright parts transmission, has only few light to be diffused into light source and closes the place.And through simulated experiment checking, can find out that said down straight aphototropism mode set can strengthen the 3D display effect on the one hand, can not influence the 2D display effect again on the other hand because having increased grid layer.
Above-mentioned explanation only is the general introduction of technical scheme of the present invention; Understand technological means of the present invention in order can more to know; And can implement according to the content of specification, and for let above and other objects of the present invention, feature and advantage can be more obviously understandable, below special act embodiment; And conjunction with figs., specify as follows.
Description of drawings
Fig. 1 is the structural representation of down straight aphototropism mode set preferred embodiment provided by the invention.
Fig. 2 is the part decomposing schematic representation of the down straight aphototropism mode set of Fig. 1.
Fig. 3 is the schematic cross-section along the III-III line of the down straight aphototropism mode set of Fig. 1.
Fig. 4 is the Illumination Distribution figure that the down straight aphototropism mode set of Fig. 1 is in first kind of illuminating state.
Fig. 5 is the Illumination Distribution figure that the down straight aphototropism mode set of Fig. 1 is in second kind of illuminating state.
The specific embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention; Below in conjunction with accompanying drawing and preferred embodiment; The specific embodiment, structure, characteristic and effect thereof to the down straight aphototropism mode set that proposes according to the present invention specify as follows:
Relevant aforementioned and other technology contents, characteristics and effect of the present invention can be known to appear in the following detailed description that cooperates with reference to graphic preferred embodiment.Through the explanation of the specific embodiment, when can being to reach technological means and the effect that predetermined purpose takes to be able to more deeply and concrete understanding to the present invention, yet the appended graphic usefulness that only provides reference and explanation be not to be used for the present invention is limited.
Fig. 1 is the structural representation of down straight aphototropism mode set preferred embodiment provided by the invention; Fig. 2 is the part decomposing schematic representation of the down straight aphototropism mode set of Fig. 1; Fig. 3 is the schematic cross-section along the III-III line of the down straight aphototropism mode set of Fig. 1.Please referring to figs. 1 through Fig. 3, a kind of down straight aphototropism mode set 100 of the embodiment of the invention, it comprises base plate 102, a plurality of light source 104, grid layer 106 and blooming piece 108.
Said base plate 102 comprises rectangle backboard 121 and four reflector plates 122 that are connected with four edges of said backboard 121 respectively.Shape has a certain degree between said four reflector plates 122 and the said rectangle backboard 121, for example can be right angle as shown in the figure, also can set according to concrete needs for obtuse angle etc., and the present invention is not as limit.In addition, rectangle backboard 121 and four reflector plates 122 also can be integrated, form needed angle through the mode that bends.Said backboard 121 and said four reflector plates 122 surround containing cavity 123 jointly.Said a plurality of light source 104 and said grid layer 106 are positioned at said containing cavity 123.Preferably, have hole (figure does not show that hole is in the place of light source 104) on the backboard 121, can light source 104 is fixing.Preferably, backboard 121 one side that light source 104 is set also can be reflecting surface.The material of backboard 121 and reflector plate 122 can but be not limited to poly terephthalic acid class plastics (Polyethylene terephthalate is called for short PET or PETP) or Merlon (Polycarbonate is called for short PC).
Said blooming piece 108 is supported and is carried on the said base plate 102 by the other end of said four reflector plates 122; To cover said containing cavity 123; That is to say; Said base plate 102 is oppositely arranged with said backboard 121, and said a plurality of light sources 104 and said grid layer 106 are between said backboard 121 and said blooming piece 108.In present embodiment, said blooming piece 108 is a diffusion sheet.Certainly, said blooming piece 108 is not limited to be merely diffuser plate, also can be prismatic lens or brightness enhancement film, perhaps is several kinds combination in diffusion sheet, prismatic lens, the brightness enhancement film, and the present invention is not as limit.
In present embodiment, the outer surface of grid layer 106 is a reflecting surface, and grid layer 106 comprises a plurality of diaphragm plates 161 and a plurality of midfeathers 162, that is to say that a plurality of diaphragm plates 161 and the outer surface of a plurality of midfeathers 162 are reflecting surface.A plurality of diaphragm plates 161 and a plurality of midfeather 162 are arranged on the backboard 121 and crisscross the setting forms a plurality of ccontaining grids 163; Each light source 104 is positioned at a ccontaining grid 163 corresponding with it, make said a plurality of light source 104 with array distribution be arranged on the said backboard 121.A plurality of diaphragm plates 161 are not staggered mutually with the end of a plurality of midfeathers 162; But a plurality of diaphragm plates 161 are resisted against on the reflector plate 122 with the end of a plurality of midfeathers 162, and therefore adjacent two diaphragm plates 161 or midfeather 162 also form ccontaining grid 163 with reflector plate 122.
Concrete, in present embodiment, grid layer 106 has a plurality of ccontaining grid 163 of arranging along first direction and second direction.It (is in this embodiment that said first direction is parallel to said ccontaining grid 163 cross direction profiles directions; The long side direction of backboard 121); Said second direction is parallel to said ccontaining grid 163 vertical distribution arrangements (being in this embodiment, the narrow edge direction of backboard 121).Please with reference to Fig. 2, a is the width of ccontaining grid 163 along said first direction; B is the width degree of ccontaining grid 163 along second direction; A is the distance between the center of two light sources 104 adjacent in a plurality of light sources 104 of same horizontally-arranged/row, in just a plurality of light sources 104 along the distance between the center of two Light-Emitting Diodes 104 of the adjacent arrangement of first direction; B is the distance between the center of two light sources 104 adjacent in a plurality of light sources 104 of same vertical row/row, in just a plurality of light sources 104 along the distance between the center of two Light-Emitting Diodes 104 of the adjacent arrangement of second direction.In present embodiment; Preferably; A=A, b=B that is to say; Ccontaining grid 163 equals in a plurality of light sources 104 along the distance A between the center of two Light-Emitting Diodes 104 of the adjacent arrangement of first direction along the width a of said first direction, ccontaining grid 163 along the width b of second direction equal in a plurality of light sources 104 along between the center of two Light-Emitting Diodes 104 of the adjacent arrangement of second direction apart from B.Please with reference to Fig. 3, h representes the height of ccontaining grid 163, the mist degree that the choosing of the optimum upper limit of h is decided by diffuser plate and the reflectivity of reflecting material.
In present embodiment, light source 104 is a light emitting diode, for example is white light-emitting diodes; Certainly, according to actual needs, also can be the Light-Emitting Diode of colors such as red, green, blue; Or the light-emitting component of forming by above-mentioned light emitting diode, the present invention is not as limit.See also Fig. 3, H is the light-emitting area 141 of light source 104 and the distance of blooming piece 108 bottom surfaces, that is to say that H is the light-emitting area 141 and the distance of blooming piece 108 near light source 104 1 sides of light source 104.In present embodiment, H>A, that is to say light source 104 light-emitting area 141 and blooming piece 108 bottom surfaces distance greater than in a plurality of light sources 104 along the distance between the center of two Light-Emitting Diodes 104 of the adjacent arrangement of first direction, preferred, H>1.1A.θ is the rising angle of said light source 104.The rising angle of light source 104 with subjective unshadowed, satisfy optical demands and is as the criterion during selection.
In present embodiment, diaphragm plate 161 comprises support and reflecting layer with midfeather 162, and the reflecting layer covers support.The material in said reflecting layer is the long reflectivity of all-wave greater than 75% reflecting material, more preferably selects the long reflectivity of all-wave greater than 90% material, optimally is chosen as the long reflectivity of all-wave greater than 98% material.In other embodiments, grid layer 106 can also adopt the long reflectivity of all-wave to process through direct injection moulding greater than 75% reflecting material, or grid layer 106 adopts surface finish or electroplating processes to reach the requirement to reflectivity.Need to prove that a plurality of diaphragm plates 161 are not limited to above several kinds of forms with the formation method of the reflecting surface of a plurality of midfeathers 162 among the present invention, and the material of reflecting surface there is not special qualification, as long as satisfy corresponding reflectivity.
In present embodiment, preferred, said down straight aphototropism mode set 100 satisfies following relational expression: H simultaneously>1.1A, θ>pi/2, a=A, if b=B is A>B, then < < if H is A < B, then 0.5Bcot (θ/>2) < h < H for h for 0.5Acot (θ/>2).Please join Fig. 4,, be about 74mm at H through experimental simulation; A is about 65mm, and B is about 63mm, under the situation of θ=120 °; When the light source 104 of down straight aphototropism mode set 100 was all opened, experimental result obtained the emitting uniform area source, and can find out through analysis chart 4; Though increased grid layer, the optics homogeneity is not affected, and is consistent with common 2D display effect; That is to say that grid layer does not influence the normally luminous of each light source, just the light that each light source sent is concentrated on outgoing in the corresponding zone of its place grid.Please with reference to Fig. 5, under identical experiment condition, when light source 104 parts of down straight aphototropism mode set 100 are opened; When part is closed; As in Fig. 2, the light source 104 shown in the dotted line in the zone is opened, and the light source 104 of dotted line exterior domain is closed; Experimental result obtains shown in the dotted line place corresponding in the zone and obtains the emitting uniform area source, and the dotted line exterior domain be even portion secretly.Can see, receive the change of 106 pairs of light of grid layer, light only in a bright parts transmission, has only few light can be diffused into light source and closes the place.Through above-mentioned simulated experiment, can find out that down straight aphototropism mode set 100 provided by the invention has reached the effect of theory demands fully.
In sum, with respect to prior art, adopt down straight aphototropism mode set of the present invention, receive the change of grid layer to light, light only in a bright parts transmission, has only few light to be diffused into light source and closes the place.And through simulated experiment checking, can find out that said down straight aphototropism mode set can strengthen the 3D display effect on the one hand, not influence the 2D display effect on the other hand again.
The above only is embodiments of the invention, is not the present invention is done any pro forma restriction; Though the present invention discloses as above with embodiment; Yet be not in order to limiting the present invention, anyly be familiar with the professional and technical personnel, in not breaking away from technical scheme scope of the present invention; When the technology contents of above-mentioned announcement capable of using is made a little change or is modified to the equivalent embodiment of equivalent variations; In every case be not break away from technical scheme content of the present invention, to any simple modification, equivalent variations and modification that above embodiment did, all still belong in the scope of technical scheme of the present invention according to technical spirit of the present invention.
Claims (10)
1. down straight aphototropism mode set; It is characterized in that; Comprise: backboard, reflector plate, a plurality of light source, grid layer and blooming piece, an end of said reflector plate are connected with the periphery of said backboard and said backboard forms containing cavity, and said a plurality of light sources and said grid layer are positioned at said containing cavity; Said blooming piece is carried on the other end of said reflector plate and covers said containing cavity; The outer surface of said grid layer is a reflecting surface, and said grid layer comprises that a plurality of diaphragm plates and crisscross setting of a plurality of midfeather form a plurality of ccontaining grids, and each said light source is positioned at a ccontaining grid corresponding with it.
2. down straight aphototropism mode set as claimed in claim 1 is characterized in that, said a plurality of light sources are light emitting diode.
3. down straight aphototropism mode set as claimed in claim 2 is characterized in that, the rising angle of said a plurality of light sources is θ, θ>pi/2.
4. down straight aphototropism mode set as claimed in claim 3 is characterized in that, the light-emitting area of said light source and said blooming piece are H near the distance of said light source one side; Being A along the distance between the center of two light sources of the adjacent arrangement of first direction in said a plurality of light source, is B along the distance between the center of two light sources of the adjacent arrangement of first direction in said a plurality of light sources, and said ccontaining grid is a along the width of said first direction; Said ccontaining grid is b along the width of said second direction, a=A, b=B; H>1.1A, if A>B, then 0.5Acot (θ/2) < h < H; If A < B, then 0.5Bcot (θ/>2) < h < H.
5. down straight aphototropism mode set as claimed in claim 1 is characterized in that, said diaphragm plate and said midfeather comprise support and cover the reflecting layer of said support.
6. down straight aphototropism mode set as claimed in claim 5 is characterized in that, the material in said reflecting layer is the long reflectivity of all-wave greater than 75% reflecting material.
7. down straight aphototropism mode set as claimed in claim 1 is characterized in that, said grid layer is formed greater than the direct injection moulding of 75% reflecting material by the long reflectivity of all-wave.
8. down straight aphototropism mode set as claimed in claim 1 is characterized in that, said grid layer surface is through polishing or electroplating processes.
9. down straight aphototropism mode set as claimed in claim 1 is characterized in that, said reflector plate and said back shaped meeting at right angles or the obtuse angle.
10. down straight aphototropism mode set as claimed in claim 1 is characterized in that, said blooming piece is one or more the combination in diffusion sheet, prismatic lens, the brightness enhancement film.
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| CN2012102731286A CN102798043A (en) | 2012-08-02 | 2012-08-02 | Direct-lighting type backlight module |
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| CN2012102731286A CN102798043A (en) | 2012-08-02 | 2012-08-02 | Direct-lighting type backlight module |
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| CN104884860A (en) * | 2012-12-20 | 2015-09-02 | 齐扎拉光系统有限责任公司 | Light-emitting unit comprising a light guide unit for a projector lamp |
| CN105242455A (en) * | 2015-10-27 | 2016-01-13 | 深圳市华星光电技术有限公司 | Backlight module and display device |
| CN106609959A (en) * | 2016-12-27 | 2017-05-03 | 广州弥德科技有限公司 | A direct type directional backlight source |
| CN108445628A (en) * | 2018-02-28 | 2018-08-24 | 厦门天马微电子有限公司 | Backing structure and display device for mounting on vehicle |
| TWI665500B (en) * | 2017-06-29 | 2019-07-11 | 中強光電股份有限公司 | Light source module |
| CN110967875A (en) * | 2019-12-30 | 2020-04-07 | 深圳市瀚达美电子有限公司 | Vehicle-mounted direct type backlight module and display device |
| CN111061091A (en) * | 2019-12-31 | 2020-04-24 | 厦门天马微电子有限公司 | Optical module and display device |
| CN114002881A (en) * | 2021-06-02 | 2022-02-01 | 友达光电股份有限公司 | Backlight module |
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| CN114002881A (en) * | 2021-06-02 | 2022-02-01 | 友达光电股份有限公司 | Backlight module |
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Application publication date: 20121128 |