CN201795430U - Bottom lighting light guide plate of LED backlight module - Google Patents

Bottom lighting light guide plate of LED backlight module Download PDF

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Publication number
CN201795430U
CN201795430U CN2009202691140U CN200920269114U CN201795430U CN 201795430 U CN201795430 U CN 201795430U CN 2009202691140 U CN2009202691140 U CN 2009202691140U CN 200920269114 U CN200920269114 U CN 200920269114U CN 201795430 U CN201795430 U CN 201795430U
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CN
China
Prior art keywords
guide plate
light guide
direct type
type light
projection
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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
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CN2009202691140U
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Chinese (zh)
Inventor
彭晖
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Jin Pi
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Jin Pi
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Filing date
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Priority to CN2009202691140U priority Critical patent/CN201795430U/en
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Publication of CN201795430U publication Critical patent/CN201795430U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses a bottom lighting light guide plate and an LED backlight module. The bottom lighting light guide plate and the LED backlight module are substantially characterized in that a plurality of recesses are formed at the inner bottom of the light guide plate, an inverted conical projection is formed or arranged on the inside of each recess, reflecting films are formed on the surfaces of the inverted conical projections, and LED light sources are arranged in a manner of the bottom lighting LED backlight module and correspond to the inverted conical projection in a one-to-one manner. Major components of light emitted by the LED light sources enter the light guide plate through the bottom, and irradiate on the lateral surfaces of the inverted conical projections, direction of propagation is changed, the light is propagated in a direction nearly parallel to a light emergent surface of the light guide plate in the light guide plate, and screen dots reflect the light irradiating thereon towards the light emergent surface of the light guide plate, thereby the light guide plate is named as the bottom lighting light guide plate. The LED backlight module adopting the bottom lighting light guide plate simultaneously has the advantages of the bottom lighting LED backlight module and an edge lighting LED backlight module while avoiding the shortcomings of the bottom lighting LED backlight module and the edge lighting LED backlight module.

Description

A kind of direct type light guide plate of LED-backlit module
Technical field
The utility model discloses and a kind ofly to have both side entering type LED-backlit module and direct-light type LED backlight module both sides' advantage and do not have the direct type light guide plate of a kind of LED-backlit module of their shortcomings separately, belongs to technical field of liquid crystal display
Background technology
LED has been widely used in the backlight arrangement of liquid crystal display, and the commercialization form in LED-backlit source mainly contains two kinds, and the one, side entering type LED-backlit module, the one, direct-light type LED backlight module.The major defect of side entering type LED-backlit module is to carry out light local area control (local dimming), the difficult backlight that is applicable to arbitrary dimension.The major defect of direct-light type LED backlight module is to be difficult for slimming and to adopt more led light source.
Therefore, need a kind of major defect that had not both had side entering type LED-backlit module and direct-light type LED backlight module, the LED-backlit module that keeps both major advantages (that is slimming,, adopt less led light source, light local area control, be applicable to the backlight of arbitrary dimension) again.
The utility model content
The direct type light guide plate of LED-backlit module of the present utility model has light-guiding function, essential characteristic is as follows, a plurality of recesses are formed on the bottom of the inside of LGP, form or be provided with the projection of a back taper build in each recess, form site (dot pattern) on the bottom of LGP.It is corresponding one by one with the projection of back taper build that the mode of employing direct-light type LED backlight module is provided with led light source, the led light source issued light enters LGP by the bottom, be mapped on the side of projection of back taper build, because the reflectance coating on the side of the projection of back taper build, changed the direction of propagation of the main component of light, make the direction propagation almost parallel of its edge in LGP with the light output surface of LGP, the site is reflected the light that is mapped on it to the top of LGP (light output surface), have the function of LGP.Therefore, be called direct type light guide plate.
In addition, by the light diffusing particles of mixing in LGP, direct type light guide plate of the present utility model has the function of diffusion.
Direct type light guide plate of the present utility model and LED-backlit module, wherein,
(A) shape of the bottom surface of recess is to select from one group of shape, and this group shape includes, but are not limited to:
(1) circle; (2) polygon; Only show quadrangle and hexagon among the figure, other polygon is not showed in the drawings.
(B) method of the formation of the projection of back taper build or setting comprises, when (1) made LGP, the projection of back taper build and recess one-shot forming formed reflectance coating on the projection of back taper build;
(2) make the projection of LGP and the back taper build have recess respectively, and on the raised surface of back taper build, form reflectance coating, the projection of back taper build is arranged in the recess, an embodiment, the bottom adhesive of the projection of back taper build is on the bottom surface of recess.
(C) shape of the side in the cross section of the projection of back taper build is to select from one group of shape, and this group shape comprises: (a) straight line; (b) curve.The shape of the side in the cross section of the projection of back taper build can be other shapes (not showing in the drawings), the main component of the light at directive top is in the side of the inside of direct type light guide plate guiding direct type light guide plate as long as the side of the projection of back taper build can enter the bottom from direct type light guide plate, promptly, the side of the projection of back taper build has changed the direction of propagation of the main component of light, makes the direction propagation almost parallel with the light output surface of LGP of its edge in LGP.
(D) projection of back taper build has identical distribution with recess, be from a component cloth, to select, this component cloth includes, but are not limited to: periodic polygonal summit (comprising periodic vertex of a triangle and periodic rectangular summit), non-periodic distribution.
(E) the minimum dimension of the bottom surface of the projection of back taper build is more than or equal to the maximum dimension of the light output surface of led light source.
(F) setting of direct type light guide plate is to select from one group is provided with, and the setting of this group comprises:: (1) transparent direct type light guide plate; (2) the inside doping light diffusing particles (light-scattering particle) of direct type light guide plate; (3) top coating one deck light diffusing particles (diffusion particle) of direct type light guide plate; (4) the inside doping light diffusing particles of direct type light guide plate and top coating one deck light diffusing particles.The difference setting of direct type light guide plate has determined direct type light guide plate to have two types, and direct type light guide plate adopts when (1) is set, and does not have diffusion function.Direct type light guide plate adopts when (2), (3), (4) are set, and has diffusion function (or being referred to as: diffusion type-direct type light guide plate, scattering-type light-guide plate).
(G) setting of the light output surface of direct type light guide plate is to select from one group is provided with, and the setting of this group comprises the surface that (1) is smooth; (2) form concaveconvex structure on the surface, comprise alligatoring structure and photon crystal structure.
(H) height of the projection of back taper build equals less than concave depth.
The dimension of the bottom surface of any one recess among the projection of any one back taper build or the distribution of recess, above-mentioned (E) among the shape of the side in the cross section of the projection of any one back taper build among the formation of the projection of any one back taper build among the shape of the bottom surface of any one recess in above-mentioned (A), above-mentioned (B) or the method for setting, above-mentioned (C), above-mentioned (D); An embodiment of the direct type light guide plate that promptly constitutes LED-backlit of the present utility model source is combined in the setting of the light output surface of any one direct type light guide plate among the setting of any one direct type light guide plate in above-mentioned (F), above-mentioned (G).
The purpose of this utility model and every effect that can reach are as follows:
(1) direct type light guide plate and the LED-backlit module that adopts the utility model to provide, the advantage of maintenance side entering type LED-backlit module, that is, and slimming and the less led light source of employing.
(2) adopt direct type light guide plate of the present utility model and LED-backlit module, the advantage that keeps the direct-light type LED backlight module: light local area control, good heat dissipation, and be applicable to large-sized backlight, promptly, even for the large scale backlight, also can provide sufficient brightness and excellent luminance uniformity.
(3) direct type light guide plate and the LED-backlit module that adopts the utility model to provide can use the lower led chip of brightness.
(4) the LED-backlit module that adopts the utility model to provide, being evenly distributed of light.
(5) direct type light guide plate and the LED-backlit module that provide of the utility model is easy to produce in batches.
The utility model and its feature and benefit will better be showed in the following detailed description.
Description of drawings
Fig. 1 a shows the top view of an embodiment of direct type light guide plate of the present utility model.
Fig. 1 b shows the top view of an embodiment of direct type light guide plate of the present utility model.
Fig. 2 a shows the sectional view of an embodiment of direct type light guide plate of the present utility model.
Fig. 2 b shows the sectional view of an embodiment of direct type light guide plate of the present utility model.
Fig. 2 c shows the schematic diagram of an embodiment of direct type light guide plate of the present utility model.
Fig. 3 a shows the sectional view of an embodiment of led light source.
Fig. 3 b shows the sectional view of an embodiment of led light source.
Fig. 3 c shows the schematic diagram of an embodiment of LED face type lamp plate.
Fig. 3 d shows the schematic diagram of an embodiment of LED stripe shape lamp plate.
Fig. 4 a shows the sectional view of an embodiment of LED-backlit module of the present utility model.
Fig. 4 b shows the sectional view of an embodiment of LED-backlit module of the present utility model.
Fig. 4 c shows the sectional view of an embodiment of LED-backlit module of the present utility model.
Specific embodiment
Though embodiment of the present utility model will be described below, following description just illustrates principle of the present utility model, rather than limitation the utility model is in the description of following embodiment.
Attention: following all embodiment that are applicable to direct type light guide plate of the present utility model and LED-backlit module:
(1) ratio of each several part is not represented the true ratio of the each several part of embodiment among each figure.
(2) LCDs have the LED-backlit module that the single or multiple direct type light guide plates of single or multiple employings are formed.
(3) do not draw among the figure miscellaneous part of LED-backlit module, miscellaneous part comprises, diffusion sheet, light-collecting piece, polaroid, reflector plate, framework, etc.
(4) has the site on the bottom of direct type light guide plate.
(5) form recess in the bottom of the inside of direct type light guide plate, in recess, form or be provided with the projection of back taper build.The side of the projection of back taper build the bottom from direct type light guide plate is entered and the main component of the light at directive top in the side of the inside of direct type light guide plate guiding direct type light guide plate, promptly, incident light enters after the direct type light guide plate, penetrate on the side of the projection of back taper build, under its effect, the main component of light is in the direction propagation almost parallel with the light output surface of direct type light guide plate of the edge, inside of direct type light guide plate.Therefore, direct type light guide plate has the function of LGP.
(6) the formation method of the projection of back taper build comprises, when (1) made LGP, the projection of back taper build and recess one-shot forming formed reflectance coating on the projection of back taper build; (2) make the projection of LGP and the back taper build have recess respectively, and on the raised surface of back taper build, form reflectance coating, the projection of back taper build is arranged in the recess, an embodiment, the bottom adhesive of the projection of back taper build is on the bottom surface of recess.
(7) height of the projection of back taper build is less than the thickness of direct type light guide plate.
(8) preferred embodiment, the height of the projection of back taper build equals concave depth.
(9) (for example, for rounded bottom surface, its minimum dimension is its diameter to the minimum dimension of the bottom surface of the projection of back taper build; For rectangular bottom surface, its minimum dimension is the length of side of its minor face.) (for example, for circular light output surface, its maximum dimension is its diameter more than or equal to the maximum dimension of the light output surface of led light source; For the rectangle light output surface, its maximum dimension is its diagonal).
(10) shape of the bottom surface of the projection of back taper build is to select from one group of shape, and this group shape includes, but are not limited to: (a) circle; (b) polygon; Only show rectangle and regular hexagon among the figure, other regular polygon is not showed.
(11) shape of the side in the cross section of the projection of back taper build is to select from one group of shape, and this group shape includes, but are not limited to: (a) straight line; (b) curve.The light at directive top becomes the light of the side of directive direct type light guide plate at the inner transformation of direct type light guide plate as long as the side of the projection of back taper build can enter most bottom from direct type light guide plate, promptly, as long as make the main component of incident light enter after the direct type light guide plate, the side of the projection of back taper build has changed the direction of propagation of the main component of light, makes the direction propagation almost parallel with the light output surface of LGP of its edge in LGP.
(12) distribution of the projection of back taper build in direct type light guide plate is to select from a component cloth, this component cloth comprises, but be not limited to periodic polygonal summit (comprising periodic orthohexagonal summit, periodic foursquare summit, periodic vertex of a triangle), non-periodic distribution.
(13) thickness of direct type light guide plate depends on the dimension of the light output surface of led light source.
(14) setting of direct type light guide plate is to select from one group is provided with, and the setting of this group comprises:: (a) transparent direct type light guide plate; (b) the inside doping light diffusing particles of direct type light guide plate; (c) top coating one deck light diffusing particles of direct type light guide plate; (d) the inside doping light diffusing particles of direct type light guide plate and top coating one deck light diffusing particles.The difference setting of direct type light guide plate has determined direct type light guide plate to have two types, when direct type light guide plate adopts being provided with of (a), does not have diffusion function.When direct type light guide plate adopts (b), (c) and being provided with (d), has diffusion function (also can be referred to as: diffusion type-direct type light guide plate, to show difference).
(15) light is subjected to scattering and reflex simultaneously when the internal communication of diffusion type-direct type light guide plate, and penetrates from the top of direct type light guide plate.
(16) cooperate the led light source that adopts, the height of the projection of selection back taper build and the size of bottom surface, make the side of projection of back taper build change the direction of propagation of the main component of light, make the direction propagation almost parallel of its edge in LGP with the light output surface of LGP,, make that the bright dipping of direct type light guide plate is even.
(17) the suitable light scattering that direct type light guide plate (diffusion type-direct type light guide plate) is set is than (optical diffusion ratio), light transmission (total optical transmission), the feature of recess and the shape and the density of distribution and site, to reach the brightness uniformity of emergent light.For example, the light scattering ratio may be selected between 5% to 90%, and light transmission may be selected between 40% to 95%.For example, for the PMMA material, when the doping light diffusing particles, make the light scattering ratio be about at 45% o'clock, its light transmission is about 80%.
(18) feature of the suitable recess that direct type light guide plate (non-diffusion type-direct type light guide plate) is set and the shape and the density of distribution and site are to reach the brightness uniformity of emergent light.
(19) material of direct type light guide plate is to select from one group of material, this group material comprises, polymethyl methacrylate (PMMA), polycarbonate (PC), polystyrene (PS), MS (styrenemethacrylate), MMA (methacrylacidmethyl), cycloolefine polymer (COP), cyclenes copolymer COC etc.
(20) form concaveconvex structure on the light output surface of direct type light guide plate, comprise alligatoring structure and photon crystal structure.
(21) adopt the embodiment of the LED-backlit module of direct type light guide plate (not show whole in the drawings, only in Fig. 4, showed the partial circuit plate and on led light source and the part direct type light guide plate and on the projection of back taper build), comprise, direct type light guide plate and at least one lamp plate fit together them.Lamp plate comprises circuit board and led light source fixed thereon.Lamp plate is to select from one group of lamp plate, and this group lamp plate comprises stripe shape lamp plate and face type lamp plate.Circuit board is to select from the set of circuits plate, and this group circuit board comprises stripe shape circuit board and face type circuit board.Face type lamp plate (as area source) comprises, a face type circuit board and at least three led light sources that are not arranged in straight line fixed thereon.Stripe shape lamp plate (as line source) comprises, a strip circuit plate and the led light source that is arranged in straight line fixed thereon.
(22) the LED-backlit module weight in the LED-backlit source of employing direct type light guide plate and a plurality of stripe shape lamp plates is lighter.
(23) the LED-backlit module good heat dissipation effect in the LED-backlit source of employing direct type light guide plate and single or multiple type lamp plates.
(24) for the LED-backlit module that comprises a plurality of lamp plates, both can carry out electrical connection between each lamp plate, also can be electrically connected with extraneous power supply implementation respectively by each lamp plate, or the combination of above-mentioned two kinds of connected modes.Circuit is set, makes and to carry out the light local area control to the LED-backlit module that adopts direct type light guide plate and lamp plate.
(25) led light source of Cai Yonging is to select from one group of encapsulation, and the encapsulation of this group comprises: comprise the encapsulation of LED surface-emitting type, have the LED surface-emitting type encapsulation of coarse surface, the LED that has lens encapsulates.A LED encapsulation can be adopted the chip of a bill coloured light, also can adopt the chip (forming the single encapsulation of RGB) of a plurality of bill coloured light.Monochromatic chip comprises ruddiness, blue light, green glow chip.
(26) encapsulation of LED surface-emitting type emits white light.
(27) light output surface that is fixed on the led light source on the circuit board can touch the bottom of direct type light guide plate, therefore, the thickness that adopts the LED-backlit module of direct type light guide plate and led light source composition is the thickness that the thickness of direct type light guide plate adds led light source, need not between direct type light guide plate and led light source, to keep big space, realize slimming, and can carry out the light local area control.
Fig. 1 shows the embodiment top view of direct type light guide plate of the present utility model.
Fig. 1 a is illustrated in the bottom view of an embodiment of the projection of the back taper build in the direct type light guide plate.Straight-down negative light-emitting component 101 comprises, be formed on its inside the bottom recess and formation or be arranged on the projection of the back taper build in the recess.The shape of the bottom of recess includes, but not limited to circular 103y, quadrangle 103f, hexagon 103L (below, be referred to as recess 103).The shape of the bottom of the projection of back taper build includes, but not limited to circular 102y, quadrangle 102f, hexagon 102L (below, be referred to as the projection 102 of back taper build).The distribution of the projection 102 of back taper build in direct type light guide plate 101 forms quadrangle, and the projection 102 of back taper build is positioned at tetragonal summit.Fig. 1 a shows the combination of projection 102 of the back taper build of difform recess 103 and different bottom shapes.
Fig. 1 b is illustrated in the bottom view of an embodiment of the projection of the back taper build in the direct type light guide plate.Straight-down negative light-emitting component 101 comprises, is formed on the recess 103 and the projection 102 that forms or be arranged on the back taper build in the recess 103 of the bottom of its inside.For simplifying, adopting circular depressions 103 and bottom is the projection 102 of the back taper build of circle.The distribution of the projection 102 of back taper build in direct type light guide plate 101 forms triangle, and the projection 102 of back taper build is positioned at the summit of triangle.
Notice that the distribution on direct type light guide plate of the projection of back taper build or recess can be other periodic distribution or non-periodic distribution.
Fig. 2 shows sectional view and the schematic diagram of the embodiment of direct type light guide plate of the present utility model.The bottom of direct type light guide plate has the site, but in order to simplify picture, among several embodiment of the direct type light guide plate in Fig. 2 and Fig. 4, does not all draw the site.
Fig. 2 a shows that the projection of back taper build and recess form simultaneously in the manufacture process of direct type light guide plate.Recess 203 is formed on the bottom of the inside of direct type light guide plate, forms the projection 202 of back taper build in recess 203.The bottom of the projection 202 of the bottom of recess 203 and back taper build is on same plane.Form reflectance coating 202f on the side of the projection 202 of back taper build.Led light source matches with the projection 202 of each back taper build.
Fig. 2 b shows that recess 203 forms in the manufacture process of direct type light guide plate 201, the projection 202 of back taper build forms separately, and forms reflectance coating 202f on its surface.The projection 202 of back taper build is arranged in the recess 203, and for example, the bottom surface 202b of the projection 202 of back taper build is bonded on the 203b of the bottom of recess 203.The side in the cross section of the projection 202 of back taper build is straight line 202z or curve 202q.Led light source matches with the projection of each back taper build.
Fig. 2 c shows the schematic diagram of the embodiment of direct type light guide plate of the present utility model.Recess 203 is formed on the bottom of the inside of direct type light guide plate 201, forms or be provided with the projection 202 of back taper build in recess 203.
Preferred embodiment, the angle between the side in the cross section of the projection 202 of inverted cone build and the end face 201t of direct type light guide plate equals 45 °.
Fig. 3 shows the embodiment of led light source, LED face type lamp plate and stripe shape lamp plate.
Fig. 3 a shows an embodiment of led light source 304, comprises support 306, filler 305, at least one led chip 307.
Fig. 3 b shows other embodiment of led light source 304, comprises that support 306, filler 305, at least one led chip 307 is characterized in that the light output surface of filler 305 has alligatoring structure 308.
An embodiment of Fig. 3 c display surface type lamp plate comprises, face type circuit board 309m and at least three led light sources 304 that are not arranged in straight line fixed thereon.
Fig. 3 d shows an embodiment of stripe shape lamp plate, comprises strip circuit plate 309t and the led light source that is arranged in straight line 304 fixed thereon.
Fig. 4 shows the embodiment of LED-backlit module of the present utility model.
Lamp plate comprises face type lamp plate and stripe shape lamp plate.Be referred to as lamp plate below.
Fig. 4 a shows an embodiment of LED-backlit module.The LED-backlit module comprises direct type light guide plate and lamp plate (comprising the led light source that is fixed thereon).Direct type light guide plate 401 comprises the projection 402 of recess 403, back taper build, and the surface of the projection 402 of back taper build forms reflectance coating 402f.Led light source 404 is fixed on the circuit board 409.Form the site on the bottom of direct type light guide plate 401.
The center of the light output surface of led light source 404 is corresponding to the projection 402 of back taper build.The light 410 that sends from the light output surface of led light source 404 enters direct type light guide plate 401 from the bottom, the side with reflectance coating of the projection 402 of back taper build is light 410 deflections, make it in the direction propagation almost parallel of the edge, inside of direct type light guide plate 401 with the light output surface 401t of direct type light guide plate 401, site on the bottom is the light reflection light output surface 401t to direct type light guide plate 401, and penetrates from light output surface 401t.
For the direct type light guide plate of doping light diffusing particles, part light directly is scattered out the light output surface 401t of direct type light guide plate, and part light is dispersed into the site of direct type light guide plate bottom, is reflected direct type light guide plate by the site again.The direct type light guide plate of doping light diffusing particles has leaded light and diffusion dual-use function.
Fig. 4 b shows another embodiment of LED-backlit module.The embodiment of it and Fig. 4 a is basic identical, and unique is not both: what Fig. 4 b adopted is the led light source 404 that light output surface has alligatoring structure 408, and optical efficiency is higher.
Fig. 4 c shows another embodiment of LED-backlit module.The embodiment of it and Fig. 4 a is basic identical, and unique is not both: what Fig. 4 c adopted is the led light source 404 that has lens 411.
Top concrete description does not limit scope of the present utility model, and only provides some specific illustrations of the present utility model.Therefore covering scope of the present utility model should be determined by claim and their legal equivalents, rather than by above-mentioned specific detailed description and embodiment decision.

Claims (9)

1. the direct type light guide plate of a LED-backlit module comprises a LGP; It is characterized in that the bottom of the inside of described LGP has at least one recess; The projection that has the back taper build in the described recess; The raised surface of described back taper build has reflectance coating; The bottom surface of described LGP has the site.
2. direct type light guide plate according to claim 1, it is characterized in that, the material of described LGP is to select from one group of material, and this group material comprises, polymethyl methacrylate, polycarbonate, polystyrene, MS, MMA, cycloolefine polymer, cyclenes copolymer.
3. direct type light guide plate according to claim 1 is characterized in that, the shape of the bottom surface of the projection of described back taper build is to select from one group of shape, and this group shape comprises: (a) circle; (2) polygon.
4. direct type light guide plate according to claim 1 is characterized in that, the shape of the side in the cross section of the projection of described back taper build is to select from one group of shape, and this group shape comprises: (a) straight line; (b) curve.
5. direct type light guide plate according to claim 1 is characterized in that, the shape of the bottom surface of described recess is circle or polygon.
6. direct type light guide plate according to claim 1 is characterized in that, the distribution of the projection of described back taper build in described LGP is to select from a component cloth, and this component cloth comprises, periodic polygonal summit, non-periodic distribution.
7. direct type light guide plate according to claim 1 is characterized in that, the setting of the light output surface of described direct type light guide plate is to select from one group is provided with, and the setting of this group comprises the surface that (1) is smooth; (2) form concaveconvex structure on the surface.
8. direct type light guide plate according to claim 7 is characterized in that described concaveconvex structure comprises alligatoring structure and photon crystal structure.
9. direct type light guide plate according to claim 1, it is characterized in that, the setting of described LGP is to select from one group is provided with, and the setting of this group comprises: the inside doping light diffusing particles of top coating one deck light diffusing particles of the inside doping light diffusing particles of transparent light guide plate, described LGP, described LGP, described LGP and top coating one deck light diffusing particles.
CN2009202691140U 2009-12-27 2009-12-27 Bottom lighting light guide plate of LED backlight module Expired - Fee Related CN201795430U (en)

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Application Number Priority Date Filing Date Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106090730A (en) * 2016-07-04 2016-11-09 京东方科技集团股份有限公司 A kind of backlight module and display device
CN106842710A (en) * 2017-03-27 2017-06-13 京东方科技集团股份有限公司 A kind of backlight module, its preparation method and display device
CN109085719A (en) * 2018-08-10 2018-12-25 深圳市华星光电技术有限公司 Direct LED backlight

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106090730A (en) * 2016-07-04 2016-11-09 京东方科技集团股份有限公司 A kind of backlight module and display device
CN106842710A (en) * 2017-03-27 2017-06-13 京东方科技集团股份有限公司 A kind of backlight module, its preparation method and display device
WO2018176825A1 (en) * 2017-03-27 2018-10-04 京东方科技集团股份有限公司 Backlight module, manufacturing method thereof and display device
CN106842710B (en) * 2017-03-27 2019-05-03 京东方科技集团股份有限公司 A kind of backlight module, its production method and display device
US10613382B2 (en) 2017-03-27 2020-04-07 Boe Technology Group Co., Ltd. Backlight module and method for manufacturing the same, and display device
CN109085719A (en) * 2018-08-10 2018-12-25 深圳市华星光电技术有限公司 Direct LED backlight
CN109085719B (en) * 2018-08-10 2021-03-16 Tcl华星光电技术有限公司 Direct type LED backlight source

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