CN201803317U - Direct type light guide plate, with groove at the bottom, of LED backlight module - Google Patents

Direct type light guide plate, with groove at the bottom, of LED backlight module Download PDF

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Publication number
CN201803317U
CN201803317U CN2010200038256U CN201020003825U CN201803317U CN 201803317 U CN201803317 U CN 201803317U CN 2010200038256 U CN2010200038256 U CN 2010200038256U CN 201020003825 U CN201020003825 U CN 201020003825U CN 201803317 U CN201803317 U CN 201803317U
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China
Prior art keywords
guide plate
light guide
direct type
type light
led
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Expired - Fee Related
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CN2010200038256U
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Chinese (zh)
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彭晖
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Jin Pi
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Jin Pi
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Abstract

The utility model discloses a direct type light guide plate of an LED backlight module, and is characterized in that at least one recess is formed at the bottom inside the direct type light guide plate; and mesh points are formed at the bottom of the direct type light guide plate. LED packaging is arranged in a direct type backlight module way to correspond to the recess. The main component of light emitted by the LED packaging is refracted by the side surface of the recess, and total internal reflection is formed at the top inside the direct type light guide plate till the mesh points scatter and reflect light emitted on the mesh points to the top (light outlet surface) of the light guide plate. Therefore, the light guide plate is called a direct type light guide plate. By adopting the method that light scattering particles are mixed to the direct type light guide plate, the direct type light guide plate also has a scattering function. The LED backlight module adopting the direct type light guide plate simultaneously has the advantages of a direct type backlight module and a side entering type backlight module, and avoids the disadvantages of the direct type backlight module and the side entering type backlight module.

Description

The reeded direct type light guide plate in the bottom of LED-backlit module
Technical field
The utility model disclose a kind of LGP of the LED of having both side entrance back module and LED down straight aphototropism mode set LED encapsulation distribution mode advantage and do not have the direct type light guide plate of LED-backlit module of their shortcoming, belong to technical field of liquid crystal display
Background technology
LED has been widely used in the backlight module device of liquid crystal display, and the commercialization form of LED-backlit module mainly contains two kinds, and the one, LED side entering type (edge backlight) module backlight, the one, LED straight-down negative (directbacklight) module backlight.The major defect of LED side entrance back module is to carry out light local area control (local dimming), the difficult backlight that is applicable to arbitrary dimension.The major defect of down straight aphototropism mode set is to be difficult for slimming and to adopt more LED encapsulation.
Therefore, need a kind of major defect that had not both had LED side entrance back module and LED down straight aphototropism mode set, the LED-backlit module that keeps the major advantage (that is slimming,, adopt less LED encapsulation, light local area control, be applicable to the backlight of arbitrary dimension) of side entrance back module and down straight aphototropism mode set 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, the bottom of the inside of LGP forms at least one cone-shaped recess and (has funnel shaped, promptly, there is not base area, have only bottom profile), form site (dot pattern) on the bottom of LGP.The mode of employing down straight aphototropism mode set is provided with the LED encapsulation makes it corresponding with recess, LED encapsulation issued light is mapped on the side of recess, owing to enter optically denser medium from optically thinner medium, the main component of light is reflected by the side, total internal reflection is formed on the top in the inside of direct type light guide plate, until the site being mapped to light on it to (light output surface) scattering of the top of LGP and reflection.Therefore, have the function of LGP, be called direct type light guide plate.In addition, by using light diffusing particles, can be so that direct type light guide plate has the function of diffusion simultaneously.
The direct type light guide plate of LED-backlit module of the present utility model, wherein,
(A) shape of the profile of the bottom surface of recess is to select from one group of shape, and this group shape includes, but are not limited to: (a) circular (202a among Fig. 2 b); (3) polygon; Only show triangle (202g among Fig. 2 b), quadrangle (202b among Fig. 2 b) and hexagon (202c among Fig. 2 b) among the figure, other polygon is not showed in the drawings.Be referred to as below: recess 202.
(B) shape of the side in the cross section of recess is to select from one group of shape, and this group shape comprises: (1) straight line (203z among Fig. 2 c and Fig. 2 d); (2) curve (203q among Fig. 2 e and Fig. 2 f); (3) broken line (203t among Fig. 2 g).The shape of the side in the cross section of recess can be other shapes (not showing in the drawings), thereby as long as the side of recess can be the refraction of the main component of the light that enters at the top of the inside of direct type light guide plate by total internal reflection, promptly, the side of recess has changed the direction of propagation of the main component of light, make its in LGP inside by total internal reflection.
(C) distribution of recess is to select from a component cloth, and this component cloth includes, but are not limited to: (1) periodic polygonal summit (comprising periodic vertex of a triangle and periodic rectangular summit); (2) non-periodic distribution.
(D) the minimum dimension of the bottom surface of recess is more than or equal to the maximum dimension of the light output surface of LED encapsulation.
(E) 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-scatteringparticle) of direct type light guide plate; (3) top coating one deck light diffusing particles (diffusionparticle) 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, when direct type light guide plate adopts being provided with of (1), does not have diffusion function.When direct type light guide plate adopts being provided with of (2), (3) and (4), has diffusion function (or being referred to as: diffusion type-direct type light guide plate, scattering-typelight-guide plate).
(F) form the convex-concave micro-structural on the surface of the side of recess, make the light of incident be scattered, reduce reflection.
(G) form the convex-concave micro-structural on the surface at the top of direct type light guide plate, improve light extraction efficiency.
The setting of any one direct type light guide plate among the minimum dimension of the bottom surface of any one recess among the distribution of any one recess among the shape of the side in the cross section of any one recess among the shape of the bottom surface of any one recess in above-mentioned (A), above-mentioned (B), above-mentioned (C), above-mentioned (D), above-mentioned (E) is combined an embodiment of the direct type light guide plate that promptly constitutes LED-backlit module of the present utility model.
The purpose of this utility model and every effect that can reach are as follows:
(1) adopt the direct type light guide plate of the LED-backlit module that the utility model provides, keep the advantage of LED side entrance back module, that is, and slimming and adopt less LED encapsulation.
(2) direct type light guide plate of employing LED-backlit module of the present utility model, the advantage that keeps the LED down straight aphototropism mode set: 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) adopt the direct type light guide plate of the LED-backlit module that the utility model provides, can use the lower led chip of brightness.
(4) adopt the direct type light guide plate of the LED-backlit module that the utility model provides, being evenly distributed of light.
(5) direct type light guide plate of the LED-backlit module that provides 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 straight-down negative light-emitting component in LED-backlit source formerly
Fig. 1 b shows the side-lighting type light-emitting element in LED-backlit source formerly
Fig. 2 a shows the top view of an embodiment of the direct type light guide plate of LED-backlit module of the present utility model.
Fig. 2 b shows the top view of an embodiment of the direct type light guide plate of LED-backlit module of the present utility model.
Fig. 2 c shows the sectional view of an embodiment of the direct type light guide plate of LED-backlit module of the present utility model.
Specific embodiment
Fig. 2 d shows the schematic diagram of an embodiment of the recess that is shaped as cone of the direct type light guide plate of LED-backlit module of the present utility model.
Fig. 2 e shows the sectional view of an embodiment of the direct type light guide plate of LED-backlit module of the present utility model.
Fig. 2 f shows the schematic diagram of an embodiment of the recess that is shaped as cone of the direct type light guide plate of LED-backlit module of the present utility model.
Fig. 2 g shows the sectional view of an embodiment of the direct type light guide plate of LED-backlit module of the present utility model.
Fig. 2 h shows the sectional view of an embodiment of the direct type light guide plate of LED-backlit module of the present utility model.
Fig. 2 j shows the sectional view of an embodiment of the direct type light guide plate of LED-backlit module of the present utility model.
Fig. 2 k shows the schematic diagram of an embodiment of the direct type light guide plate of LED-backlit module of the present utility model.
Fig. 3 a shows the sectional view of an embodiment of LED surface-emitting type (top view) encapsulation.
Fig. 3 b shows the sectional view of an embodiment of LED surface-emitting type (top view) encapsulation.
The schematic diagram of an embodiment of Fig. 4 a show luminous board.
Fig. 4 b shows the schematic diagram of an embodiment of lamp bar.
Fig. 5 a shows the sectional view of an embodiment of the LED-backlit module that adopts direct type light guide plate of the present utility model.
Fig. 5 b shows the sectional view of an embodiment of the LED-backlit module that adopts direct type light guide plate of the present utility model.
Although 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 the reeded direct type light guide plate in bottom in LED-backlit of the present utility model source:
(1) ratio of each several part is not represented the true ratio of the each several part of embodiment among each figure.
(2) module backlight that adopts single or multiple direct type light guide plates to form constitutes the LED-backlit source of LCD.
(3) do not draw among Fig. 5 miscellaneous part of LED-backlit module, miscellaneous part comprises, diffusion sheet, light-collecting piece, polaroid, reflector plate, framework, etc.
(4) recess that forms in the bottom of the inside of direct type light guide plate, LED encapsulation issued light is mapped on the side of recess, owing to enter optically denser medium from optically thinner medium, the main component of light is reflected by the side, total internal reflection is formed on the top in the inside of direct type light guide plate, being mapped to light on it to (light output surface) scattering of the top of LGP and reflection, therefore, direct type light guide plate has the function of LGP until the site.
(5) recess is shaped as cone (funnel shaped promptly, does not have base area, has only bottom profile).
(6) height of recess is less than or equal to the thickness of direct type light guide plate.
(7) (for example, for rounded bottom surface, its minimum dimension is its diameter to the minimum dimension of the bottom surface of recess; 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 encapsulation; For the rectangle light output surface, its maximum dimension is its diagonal).
(8) shape of the profile of the bottom surface of recess is to select from one group of shape, and this group shape includes, but are not limited to: (a) circular (202a among Fig. 2 b); (b) polygon; Only show triangle (202g among Fig. 2 b), quadrangle (202b among Fig. 2 b) and hexagon (202c among Fig. 2 b) among the figure, other regular polygon is not showed.。
(9) shape of the side in the cross section of recess is to select from one group of shape, and this group shape includes, but are not limited to: (a) straight line (203z among Fig. 2 d); (b) curve (203q among Fig. 2 f); (c) broken line (203t among Fig. 2 g).As long as LED encapsulation issued light is mapped on the side of recess, the main component of light is reflected by the side, total internal reflection is formed on the top in the inside of direct type light guide plate, until the site light that is mapped on it is got final product to the top of LGP (light output surface) scattering and reflection.
(10) distribution of the recess in the direct type light guide plate is to select from a component cloth, this component cloth comprises, but be not limited to, (a) periodic polygonal summit (comprises periodic orthohexagonal summit (in the drawings show), periodic foursquare summit (Fig. 2 a), periodic vertex of a triangle (Fig. 2 b)); (b) non-periodic distribution (not showing in the drawings).
(11) material of direct type light guide plate is to select from one group of material, this group material comprises, poly-methylacrylic acid methyl esters (PMMA), polycarbonate (PC), polystyrene (PS), MS (styrenemethacrylate), MMA (methacrylacidmethyl), cycloolefine polymer (COP), cyclenes copolymer COC etc.
(12) 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).
(13) 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.
(14) cooperate the LED encapsulation of adopting, the height of the recess of selection direct type light guide plate and the size of bottom surface make that the bright dipping of direct type light guide plate is even.
(15) 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%.
(16) 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.
(17) form the convex-concave micro-structural on the surface of the side of recess, make the light of incident be scattered, reduce reflection (not showing in the drawings).
(18) form the convex-concave micro-structural on the surface at the top of direct type light guide plate, improve light extraction efficiency (only in Fig. 2 c, showing).
(19) adopt two embodiment of the light-emitting component of direct type light guide plate (not show whole in the drawings, only in Fig. 5, showed the partial circuit plate and on LED encapsulation and the part direct type light guide plate and on a recess), comprise, direct type light guide plate and at least one lamp plate fit together them.Lamp plate comprises circuit board and LED encapsulation fixed thereon.Lamp plate is to select from one group of lamp plate, and this group lamp plate comprises, some type lamp plate, 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, some type circuit board, stripe shape circuit board and face type circuit board.Point type lamp plate (not showing in the drawings) comprises, a some type circuit board and a LED encapsulation fixed thereon.(Fig. 4 a) comprises face type lamp plate, a face type circuit board and at least three LED encapsulation that are not arranged in straight line fixed thereon.Stripe shape lamp plate (Fig. 4 b) comprises, a strip circuit plate and the LED encapsulation that is arranged in straight line fixed thereon.
(20) adopt the LED-backlit module weight of direct type light guide plate and a plurality of stripe shape lamp plates lighter.
(21) the LED-backlit module good heat dissipation effect of employing direct type light guide plate and single or multiple type lamp plates.
(22) for the module backlight 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.
(23) the LED encapsulation of adopting is to select from one group of encapsulation, and this group encapsulation 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.The encapsulation of LED surface-emitting type also can emit white light.
(24) light output surface that is fixed on the LED encapsulation 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 encapsulation composition is the thickness that the thickness of direct type light guide plate adds the LED encapsulation, need not between direct type light guide plate and LED encapsulation, to keep very large space, realize slimming, and can carry out the light local area control.
(25) thickness of direct type light guide plate depends on the dimension of the light output surface of LED encapsulation.
Fig. 1 shows the schematic diagram of LED-backlit module formerly.
Fig. 1 a shows the sectional view of an embodiment of LED down straight aphototropism mode set formerly.The LED down straight aphototropism mode set comprises, face type lamp plate and diffuser plate 101a.Wherein, face type lamp plate comprises face type circuit board 109 and not point-blank at least three LED encapsulation 108 fixed thereon.Its shortcoming is, the slimming of LED down straight aphototropism mode set has been limited in the space 124 between lamp plate and the diffuser plate 101a, and needs to adopt more LED encapsulation, makes the cost height.Its advantage is good heat dissipation, can carries out the local LED-backlit source of controlling and being applicable to virtually any size of light.
Fig. 1 b shows the sectional view of an embodiment of LED side entrance back module formerly.LED side entrance back module comprises, stripe shape lamp plate and LGP 101b.Wherein, the stripe shape lamp plate comprises stripe shape circuit board 110 and at least one LED encapsulation 108 fixed thereon.LGP 101b comprises top 106 and bottom 105.Form the site on the bottom 105.Its shortcoming is, can not carry out the local control of light and difficulty be applied to large-sized LED-backlit source.Its advantage is the slimming of LED side entrance back module, and adopts less LED encapsulation, makes cost lower.
Fig. 2 shows several embodiment of LED 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, does not all draw the site.
Fig. 2 a and Fig. 2 b show the bottom view (that is, direct type light guide plate 201 upsets, making its bottom upwards) of the embodiment of LED direct type light guide plate of the present utility model.At least one recess 202 is formed on the bottom in the inside of direct type light guide plate 201, and it is shaped as cone (funnel shaped promptly, does not have base area, has only bottom profile).
Notice that the distribution of (1) recess 202 on direct type light guide plate can be any other periodic distribution or non-periodic distribution.(2) shape of the bottom surface of recess 202 includes, but not limited to circular depressions (202a) and polygon (only showing triangle recess (202g), quadrangle recess (202b), hexagonal recess 202c among Fig. 2 b).
The recess 202 of the direct type light guide plate 201 that Fig. 2 a shows is distributed in periodic foursquare summit.Recess 202 in the direct type light guide plate that Fig. 2 b shows is distributed in periodic vertex of a triangle.The LED encapsulation matches with each recess, as light source.
Fig. 2 c to Fig. 2 j shows the sectional view of embodiment of the direct type light guide plate in LED-backlit of the present utility model source.Direct type light guide plate 201 is characterised in that, forms at least one cone-shaped recess 202, the light diffusing particles of can mixing in the inside of direct type light guide plate 201 in the bottom of the inside of direct type light guide plate 201.
Fig. 2 c shows an embodiment of direct type light guide plate 201, it is characterized in that, forms the recess 202 of at least one circular cone build in the bottom of the inside of direct type light guide plate 201, and the side 203z in the cross section of recess 202 is a straight line.Convex-concave micro-structural 221 is arranged at the top 206 of direct type light guide plate 201, and site 204 is arranged at bottom 205.
Note, can form the convex-concave micro-structural on the surface of the side of recess, make the light of incident be scattered, reduce reflection (not showing in the drawings).Can form convex-concave micro-structural (or being called alligatoring) on the surface at the top of direct type light guide plate, improve light extraction efficiency.
The schematic diagram of the embodiment of the recess 202 of the cone that Fig. 2 d exploded view 2c shows.Among the figure, the profile of the bottom surface of recess 202 be shaped as rounded bottom surface 202a, the diameter of rounded bottom surface 202a is 202d, the high 202e of recess 202 is the distances from the summit 202f of recess 202 to bottom surface 202a).
Notice that the cross section of recess is by the summit of recess and the plane vertical with the bottom surface.
An embodiment, (for circular exiting surface, its full-size be the diameter of circle to diameter 202d more than or equal to the full-size of the exiting surface of LED encapsulation.For the rectangle exiting surface, its full-size is diagonal).
Fig. 2 e shows an embodiment of direct type light guide plate 201.At least one recess 202 is formed on the bottom of the inside of direct type light guide plate 201, it is characterized in that, the side 203q in the cross section of recess 202 is a curve.
The schematic diagram of the recess 202 that Fig. 2 f exploded view 2e shows, among the figure, the profile of the bottom surface of recess 202 be shaped as circular 202a, it is characterized in that the side 203q in the cross section of recess 202 is a curve.
Fig. 2 g shows an embodiment of direct type light guide plate 201.At least one recess 202 is formed on the bottom of the inside of direct type light guide plate 201, it is characterized in that, the side 203t in the cross section of recess 202 is a broken line.
Note, in the description afterwards, all different recesses are referred to as recess 202.
Fig. 2 h shows an embodiment of the setting of direct type light guide plate 201.Top coating one deck scattering particles 201a of direct type light guide plate 201, at least one recess 202 is formed on the bottom of its inside.
Fig. 2 j shows an embodiment of the setting of direct type light guide plate 201.The direct type light guide plate 201b of inner doping light diffusing particles, at least one recess 202 is formed on the bottom of its inside.
Note, in the description afterwards, all different direct type light guide plates that are provided with are referred to as direct type light guide plate 201.
Fig. 2 k shows the schematic diagram of an embodiment of direct type light guide plate 201.This schematic diagram is direct type light guide plate 201 upsets, makes its bottom upwards.The bottom of the inside of direct type light guide plate 201 has cone-shaped recess 202, is distributed in rectangular four summits.
Fig. 3 a shows an embodiment of LED encapsulation 308, comprises support 323, filler 322 and at least one led chip 330.
Fig. 3 b shows other embodiment of LED encapsulation 308, comprises that support 323, filler 322 and at least one led chip 330 is characterized in that the light output surface of filler 322 has alligatoring structure 321.
Fig. 4 display surface type lamp plate and stripe shape lamp plate.The distribution of the recess on the position that is fixed on the LED encapsulation on the lamp plate and the direct type light guide plate is corresponding.
Fig. 4 a display surface type lamp plate comprises, face type circuit board 409 and at least three LED encapsulation 408 that are not arranged in straight line fixed thereon.
Fig. 4 b shows the stripe shape lamp plate, comprises strip circuit plate 410 and at least two LED encapsulation 408 that are arranged in straight line fixed thereon.
Fig. 5 shows the embodiment of the LED-backlit module that adopts direct type light guide plate and lamp plate composition.
Fig. 5 a shows an embodiment of the LED-backlit module that adopts direct type light guide plate and lamp plate (comprising the luminous encapsulation of LED face that is fixed thereon) composition.The part that includes only a luminous encapsulation 508 of LED face of the part that includes only a recess 502 of Fig. 5 a displaying direct type light guide plate 501 and the circuit board 511 corresponding with it.Form site 504 on the bottom 505 of direct type light guide plate 501.The center of the light output surface of the filler 522 of the luminous encapsulation 508 of LED face is corresponding to recess 502.The light 525 directive direct type light guide plates 501 that send from the light output surface of the filler 522 of the luminous encapsulation 508 of LED face, be mapped on the side 503 of recess 502, owing to be to enter optically denser medium from optically thinner medium, the main component 525 of light is reflected by side 503, total internal reflections are formed on the top 506 in the inside of direct type light guide plate 501, until site 504 being mapped to light on it to (light output surface) scattering of the top of LGP 501 and reflection.The light output surface of the luminous encapsulation 508 of LED face has alligatoring structure 521, and optical efficiency is higher.
Expanding formula-direct type light guide plate for the doping light diffusing particles, part light directly is scattered out the top 506 of expanding formula-direct type light guide plate, part light is dispersed into the site 504 of expanding formula-direct type light guide plate bottom, is reflected expanding formula-direct type light guide plate by site 504 again.Expanding formula-the direct type light guide plate of doping light diffusing particles has leaded light and diffusion dual-use function.
Fig. 5 b shows another embodiment of the LED-backlit module of the lamp plate composition that adopts direct type light guide plate and comprise the luminous encapsulation of LED face.The embodiment of it and Fig. 5 a is basic identical, and unique is not both: what Fig. 5 b adopted is the LED encapsulation 508 that lens 526 are arranged.
When assembling, the light output surface that LED is encapsulated is close to the bottom of direct type light guide plate, make the light-emitting component in LED-backlit source reach: to realize that slimming, implementation light local area control, good heat dissipation effect, the less LED encapsulation of employing, cost reduce, in addition, because the LED encapsulation is arranged on the below of direct type light guide plate, therefore, be applicable to large-sized LED-backlit source.
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 cone-shaped recess; The bottom of described LGP has the site; Wherein, the main component that is mapped to the light on the side of described recess is reflected by the side, and form total internal reflection at the top of the inside of described LGP, until described site being mapped to of light output surface scattering and the reflection of the main component of the light on it to described LGP.
2. the direct type light guide plate of the LED-backlit module of 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. the direct type light guide plate of the LED-backlit module of 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: inside doping light diffusing particles and top coating one deck light diffusing particles of the inside doping light diffusing particles of transparent LGP, LGP, top coating one deck light diffusing particles of LGP, LGP.
4. the direct type light guide plate of the LED-backlit module of claim 1 is characterized in that, the shape of the profile of the bottom surface of described recess is to select from one group of shape, and this group shape comprises: (a) circle; (2) polygon.
5. the direct type light guide plate of the LED-backlit module of claim 1 is characterized in that, the shape of the side in the cross section of described recess is to select from one group of shape, and this group shape comprises: (a) straight line; (b) curve; (c) broken line.
6. the direct type light guide plate of the LED-backlit module of claim 1 is characterized in that, forms the convex-concave micro-structural on the surface of the side of described recess.
7. the direct type light guide plate of the LED-backlit module of claim 1 is characterized in that, forms the convex-concave micro-structural on the surface at the top of described LGP.
8. the direct type light guide plate of the LED-backlit module of claim 1 is characterized in that, the height of recess is less than the thickness of described LGP.
9. the direct type light guide plate of the LED-backlit module of claim 1 is characterized in that, the distribution of described recess in described LGP is to select from a component cloth, and this component cloth comprises, periodic polygonal summit, non-periodic distribution.
CN2010200038256U 2010-01-12 2010-01-12 Direct type light guide plate, with groove at the bottom, of LED backlight module Expired - Fee Related CN201803317U (en)

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Cited By (4)

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Publication number Priority date Publication date Assignee Title
CN107024797A (en) * 2011-11-07 2017-08-08 Lg伊诺特有限公司 Optical sheet and display device and light-emitting device with the optical sheet
CN108388047A (en) * 2018-02-24 2018-08-10 惠科股份有限公司 A kind of backlight module and display device
CN110352319A (en) * 2016-11-18 2019-10-18 康宁股份有限公司 Micro-structural light guide plate and device comprising it
CN112558213A (en) * 2019-09-26 2021-03-26 夏普株式会社 Illumination device and display device

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107024797A (en) * 2011-11-07 2017-08-08 Lg伊诺特有限公司 Optical sheet and display device and light-emitting device with the optical sheet
CN107024797B (en) * 2011-11-07 2021-02-23 Lg伊诺特有限公司 Optical sheet, and display device and light-emitting device provided with same
CN110352319A (en) * 2016-11-18 2019-10-18 康宁股份有限公司 Micro-structural light guide plate and device comprising it
US11092733B2 (en) 2016-11-18 2021-08-17 Corning Incorporated Microstructured light guide plates and devices comprising the same
CN108388047A (en) * 2018-02-24 2018-08-10 惠科股份有限公司 A kind of backlight module and display device
WO2019161629A1 (en) * 2018-02-24 2019-08-29 惠科股份有限公司 Backlight module and display device
US11092847B2 (en) 2018-02-24 2021-08-17 HKC Corporation Limited Backlight module and display device
CN112558213A (en) * 2019-09-26 2021-03-26 夏普株式会社 Illumination device and display device

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