CN201593724U - Luminous element adopting direct light guide plate with concave part of LED backlight source - Google Patents
Luminous element adopting direct light guide plate with concave part of LED backlight source Download PDFInfo
- Publication number
- CN201593724U CN201593724U CN2009202763420U CN200920276342U CN201593724U CN 201593724 U CN201593724 U CN 201593724U CN 2009202763420 U CN2009202763420 U CN 2009202763420U CN 200920276342 U CN200920276342 U CN 200920276342U CN 201593724 U CN201593724 U CN 201593724U
- Authority
- CN
- China
- Prior art keywords
- guide plate
- recess
- light guide
- light
- led
- Prior art date
- 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
Links
Images
Landscapes
- Planar Illumination Modules (AREA)
Abstract
The utility model discloses a luminous element comprising a direct light guide plate, a transparent adhesive layer, a circuit board and an LED encapsulation, wherein a concave part is formed at the inner top of the direct light guide plate; the transparent adhesive layer bonds the light emergence surface of the LED encapsulation with the corresponding light incidence bottom surface of the direct light guide plate, so as to lead the LED encapsulation and the concave parts to correspond one by one, and air does not exist between the light emergence surface of the LED encapsulation and the light incidence bottom surface of the direct light guide plate. The filler of the LED encapsulation, the transparent adhesive layer and the direct light guide plate has same or approximate refraction coefficients, therefore, light is emitted out by the chip of the LED encapsulation, and enters the light guide plate after passing through the filler of the LED encapsulation and the transparent adhesive layer; the light has no total internal reflection at the boundary between the filler and the transparent adhesive layer as well as the boundary between the transparent adhesive layer and the light incidence bottom surface, thus leading the light emitted by the LED chip to completely enter the light guide plate and penetrate onto the side surface of the concave part; and the principal components of the light change the transmission direction, thus leading the light to be transmitted along the almost parallel direction of the inner edge of the light guide plate and the light emergence surface.
Description
Technical field
The employing that the utility model discloses a kind of LED-backlit source has the light-emitting component of the direct type light guide plate of recess, belongs to technical field of liquid crystal display
Background technology
LED has been widely used in the backlight arrangement of liquid crystal display, the commercialization form in LED-backlit source mainly contains two kinds, the one, the side-light type in LED-backlit source (edge backlight) light-emitting component, the one, the straight-down negative in LED-backlit source (direct backlight) light-emitting component.The major defect of the side-lighting type light-emitting element in LED-backlit source comprises can not carry out light local area control (local dimming), difficulty is applicable to large-sized backlight.The major defect of straight-down negative light-emitting component comprises and is difficult for slimming and adopts more LED encapsulation.
A kind of both do not had the side-lighting type light-emitting element in LED-backlit source and a major defect of straight-down negative light-emitting component, keep the LGP that has recess (light Guide Plate) in LED-backlit source of the major advantage (that is slimming,, adopt less LED encapsulation, light local area control, be applicable to the backlight of arbitrary dimension) of side-lighting type light-emitting element and straight-down negative light-emitting component to be suggested again.
The method of traditional assembling straight-down negative light-emitting component, be the lamp plate that has LED encapsulation is arranged on diffuser plate (Diffuser Plate) the below of bottom surface to form light-emitting component, between the light output surface of LED encapsulation and the diffuser plate the air gap is arranged.Its weak point is: the refractive index of the filler of LED encapsulation is about n=1.5, and the light that led chip sends has a total internal reflection at the interface the light output surface of the filler of LED encapsulation and air, and therefore, the light extraction efficiency that LED encapsulates can also improve again.
The method of traditional assembling side-lighting type light-emitting element is that the lamp bar (Light Bar) that has the LED encapsulation is arranged on the side of LGP to form light-emitting component.
Therefore, need a kind of straight-down negative light-emitting component that adopts LGP, make: (1) avoids the major defect of side-lighting type light-emitting element and straight-down negative light-emitting component; The major advantage that keeps both simultaneously promptly, slimming, adopts less LED encapsulation, light local area control, is applicable to the backlight of arbitrary dimension, so reduces cost.(2) avoid the total internal reflection at the interface of light that led chip sends, improve the light extraction efficiency of LED encapsulation, reduce heating at the light output surface and the air of filler; (3) avoid the reflection of light, improve the coupling efficiency (couplingefficiency) between led light source and the LGP at the light-entering surface place of LGP.
The utility model content
The employing in LED-backlit of the present utility model source has the light-emitting component of the direct type light guide plate of recess, comprises direct type light guide plate, at least one lamp plate and substratum transparent.It is characterized in that, lamp plate comprises circuit board and at least one LED encapsulation fixed thereon, the recess of at least one reverse taper shape is formed on the top of the inside of direct type light guide plate, form site (dot pattern) on the bottom of direct type light guide plate, the light output surface of the filler of LED encapsulation is bonding by the light inlet bottom surface of a substratum transparent and corresponding direct type light guide plate, makes that the LED encapsulation is corresponding one by one with recess.Filler, substratum transparent and the direct type light guide plate of LED encapsulation (for example have identical or close refraction coefficient, difference is at 0-10%), this substratum transparent bonds together the light output surface of the filler of LED encapsulation and the corresponding light inlet bottom surface of direct type light guide plate, making does not have air between the corresponding light inlet bottom surface of the light output surface of filler and direct type light guide plate, therefore, light sends from the chip of LED encapsulation, filler and substratum transparent through the LED encapsulation enter direct type light guide plate.
Preferred embodiment: the refraction coefficient of filler is equal to or less than the refraction coefficient of substratum transparent, and light does not have a total internal reflection at the interface between filler and substratum transparent; The refraction coefficient of substratum transparent is equal to or less than the refraction coefficient of direct type light guide plate, light does not have a total internal reflection at the interface between the light inlet bottom surface of substratum transparent and direct type light guide plate, thereby makes the light of light output surface that arrives the filler of LED encapsulation from led chip all enter direct type light guide plate.
Even filler, substratum transparent and the direct type light guide plate of LED encapsulation have close refraction coefficient, for example, difference is 5%, and light also is very little by the part of total internal reflection.An embodiment: the refraction coefficient of substratum transparent be filler refraction coefficient 95%, when the refraction coefficient of filler is n=1.5, the refraction coefficient of substratum transparent then is n=95%x1.5=1.425, at the interface the alinternal reflection angle of light between filler and substratum transparent is 72 °, enter 42 ° of the alinternal reflection angles of air much larger than light from filler, therefore, very little by the luminous flux of total internal reflection.
LED encapsulation issued light enters direct type light guide plate by the bottom, be mapped on the side of recess, because reflectance coating on the total internal reflection of the side of recess or the side of recess or the reflecting object in the recess, changed the direction of propagation of the main component of light, make the direction propagation almost parallel with the light output surface of direct type light guide plate of its edge in direct type light guide plate, the site is reflected the light that is mapped on it to the top of direct type light guide plate (light output surface).The utility model is characterized in that,
(A) substratum transparent is to select from one group of material, and this group material includes, but not limited to silica gel, silicone adhesive, epoxy resin, etc.
(B) preferred embodiment: the refraction coefficient of filler is equal to or less than the refraction coefficient of substratum transparent.
(C) preferred embodiment: the refraction coefficient of substratum transparent is equal to or less than the refraction coefficient of LGP.
(D) thickness of substratum transparent as thin as a wafer, micron dimension to the millimeter magnitude.
(E) preferred embodiment: the refraction coefficient of the filler of the refraction coefficient of LGP, LED encapsulation, the refraction coefficient of substratum transparent are all between n=1.47 to n=1.53.
(F) LED face luminous (top view) encapsulation, preferred embodiment: the luminous encapsulation of SMD (SMD) face are adopted in the LED encapsulation.After this, be called for short the LED encapsulation.LED encapsulation comprises, support (support has groove), is fixed at least one led chip and filler on the support; Filler is filled in the groove and covers led chip.A LED encapsulation can be adopted the chip of a bill coloured light, also can adopt the chip of a plurality of bill coloured light.Monochromatic chip comprises ruddiness, blue light, green glow chip.The LED encapsulation also can emit white light.The filler of LED encapsulation has the single or multiple lift structure, and the material of each layer filler is to select from one group of material, and this group material comprises, transparency material, is mixed with the transparency material of fluorescent material.Transparency material is to select from one group of material, and this group material includes, but not limited to silica gel, epoxy resin.
(G) adopt the light-emitting component of direct type light guide plate to comprise, direct type light guide plate and at least one lamp plate adopt substratum transparent that they are fitted together.The structure of lamp plate comprises circuit board and LED encapsulation fixed thereon.The shape of lamp plate comprises a type lamp plate, stripe shape lamp plate and face type lamp plate.Point type lamp plate comprises, a circuit board and a LED encapsulation fixed thereon.Stripe shape lamp plate (as line source) comprises, a strip circuit plate and at least two LED encapsulation that are arranged in straight line fixed thereon.Face type lamp plate (as area source) comprises, a face type circuit board and at least three LED encapsulation that are not arranged in straight line fixed thereon.
(H) recess of direct type light guide plate has the reverse taper shape, and the shape of its bottom surface is to select from one group of shape, and this group shape includes, but are not limited to: (1) circular (therefore, recess shapes is the inverted cone shape); (2) polygon comprises, equilateral triangle (therefore, recess shapes is the shape of falling the triangular pyramid), square (therefore, recess shapes is the shape of falling the rectangular pyramid), regular hexagon (therefore, recess shapes is the shape of falling the hexagonal pyramid) and other polygon.Notice that the recess of (1) direct type light guide plate has the shape of funnel, the bottom surface of recess is not a face, has only profile, does not have area, in order to simplify, still is called the bottom surface of recess; (2) shape of the bottom surface of recess comprises ellipse, in order to simplify, rounded bottom surface and oval bottom surface is referred to as rounded bottom surface.
(I) shape of the side in the cross section of the recess of direct type light guide plate is to select from one group of shape, and this group shape comprises: (1) straight line; (b) curve; (c) broken line.The shape of the side in the cross section of recess 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 recess can enter the bottom from direct type light guide plate, promptly, the side of recess 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.
(J) distribution of the recess of direct type light guide plate is to select from a component cloth, this component cloth comprises, but be not limited to: the polygonal summit of polygonal summit, periodic distribution (comprising the rectangular summit of the vertex of a triangle of periodic distribution and periodic distribution), non-periodic distribution.
(K) the minimum dimension of the bottom surface of the recess of direct type light guide plate is more than or equal to the maximum dimension of the light output surface of LED encapsulation.
(L) setting in the recess of direct type light guide plate is to select from one group is provided with, and the setting of this group comprises: non-filler in (1) recess; (2) form one deck reflectance coating on the recess side; (3) reflecting object identical shaped with recess is set in the recess, the top of this reflecting object is equal substantially with the top of LGP; (4) reflecting object identical shaped with recess is set in the recess, the top of this reflecting object is lower than the top of LGP, fill and the filler of LGP same material or the filler that thermal expansion factor is equal to or less than LGP in the over top of reflecting object, the top of filler is equal substantially with the top of LGP.Avoid above reflecting object, forming the dark space.Wherein, the material of reflectance coating is to select from one group of material, and this group material comprises that metal or nonmetal, metal comprise silver, aluminium, nickel, chromium, gold, etc., nonmetally comprise white PET, etc.The material of reflecting object is to select from one group of material, this group material comprises, metal material or nonmetallic materials, metal material comprises silver, aluminium, Deng, nonmetallic materials comprise the material that is equal to or less than the thermal expansion factor of LGP with LGP identical materials, thermal expansion factor, for nonmetallic materials, will form one deck reflective metal material or white PET material on its surface.
(M) 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.
(N) 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, 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-type light-guide plate).
The purpose of this utility model and every effect that can reach are as follows:
(1) adopts the employing in the LED-backlit source that the utility model provides to have the light-emitting component of the direct type light guide plate of recess, reduce light, improve the light extraction efficiency of LED encapsulation in the filler of LED encapsulation and the total internal reflection at the interface between the substratum transparent.Reduce at the interface the total internal reflection of light between the light inlet bottom surface of substratum transparent and LGP, improve the coupling efficiency between led light source and the LGP.The light-emitting component of the direct type light guide plate in the LED-backlit source that employing the utility model provides can use the lower led chip of brightness, or adopts less LED encapsulation, reduces cost.
(2) employing in the LED-backlit source that provides of the utility model has the light-emitting component of the direct type light guide plate of recess, keeps the advantage of the side-lighting type light-emitting element in LED-backlit source, that is, and and slimming and adopt less LED encapsulation.
(3) employing in the LED-backlit source that provides of the utility model has the light-emitting component of the direct type light guide plate of recess, the advantage that keeps the straight-down negative light-emitting component in LED-backlit source: the light local area control, be applicable to large-sized backlight, promptly, even for the large scale backlight, also can provide sufficient brightness and excellent luminance uniformity.
(4) employing in the LED-backlit source that provides of the utility model has the light-emitting component of the direct type light guide plate of recess, and lightness distribution is even.
(5) employing in the LED-backlit source that provides of the utility model has the light-emitting component of the direct type light guide plate of recess, 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 shows the direct type light guide plate in LED-backlit source formerly.
Fig. 2 shows the embodiment of the employing lamp plate of the present utility model and the light-emitting component of the direct type light guide plate that has recess.
Fig. 3 shows the embodiment of the employing lamp bar of the present utility model and the light-emitting component of the direct type light guide plate that has recess.
Fig. 4 shows the embodiment of distribution of the recess of the direct type light guide plate have recess.
Fig. 5 shows the embodiment of reverse taper shape of the recess of the direct type light guide plate have recess.
Fig. 6 shows the embodiment of shape of side in cross section of the recess of the direct type light guide plate have recess.
Fig. 7 shows the embodiment of setting of the recess of the direct type light guide plate have recess.
Fig. 8 shows the embodiment of the setting of the direct type light guide plate that has recess.
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: the following employing lamp plate in LED-backlit of the present utility model source and all embodiment of the light-emitting component of the direct type light guide plate that has recess of being applicable to:
(1) ratio of each several part is not represented the true ratio of the each several part of embodiment among each figure.
(2) the LED-backlit source of LCD comprises that single or multiple light-emitting components of the present utility model constitute.
(3) do not draw among Fig. 2 and Fig. 3 miscellaneous part of light-emitting component in LED-backlit source, miscellaneous part comprises, diffusion sheet, light-collecting piece, polaroid, reflector plate, framework, etc.
(4) material of substratum transparent is to select from one group of material, and this group material includes, but not limited to silica gel, silicone adhesive, epoxy resin, etc.
(5) preferred embodiment: the refraction coefficient of filler is equal to or less than the refraction coefficient of substratum transparent.
(6) preferred embodiment: the refraction coefficient of substratum transparent is equal to or less than the refraction coefficient of LGP.
(7) preferred embodiment: the refraction coefficient of the filler of the refraction coefficient of LGP, LED encapsulation, the refraction coefficient of substratum transparent are all between n=1.47 to n=1.53.
(8) thickness of substratum transparent micron dimension to the millimeter magnitude.
(9) size of substratum transparent is equal to or greater than the size of the light output surface of LED encapsulation.
(10) form recess at the top of the inside of direct type light guide plate, the side of recess 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 side at recess, 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.
(11) recess of direct type light guide plate has reverse taper shape (shape of funnel), and the bottom surface of reverse taper shape is the bottom surface of recess.The cross section of recess was the summit of recess and the plane vertical with the bottom surface of recess.The bottom surface of recess and the light output surface of LGP are in same plane.The bottom surface of recess is not a face, and the bottom surface of recess is as the opening part of funnel, and unactual area has only profile.In order to simplify, still be called the bottom surface of recess.
(12) height of recess is less than or equal to the thickness of direct type light guide plate.
(13) dimension of the bottom surface of recess depends on the dimension of the light output surface of LED encapsulation, and (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).
(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 the side of recess change the direction of propagation of the main component of light, make the direction propagation almost parallel of its edge in direct type light guide plate with the light output surface of direct type light guide plate,, make that the bright dipping of direct type light guide plate is even.
(15) 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: (a) circular (therefore, recess shapes is the inverted cone shape); (b) polygon comprises, equilateral triangle (therefore, recess shapes is the shape of falling the triangular pyramid), square (therefore, recess shapes is the shape of falling the rectangular pyramid), regular hexagon (therefore, recess shapes is the shape of falling the hexagonal pyramid) and other polygon.Notice that the shape of the bottom surface of recess comprises ellipse, in order to simplify, rounded bottom surface and oval bottom surface is referred to as rounded bottom surface.
(16) 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; (b) curve; (c) broken line; The main component of 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 recess can enter the 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 recess has changed the direction of propagation of the main component of light, makes the direction propagation almost parallel with the light output surface of direct type light guide plate of its edge in direct type light guide plate.
(17) setting in the recess is to select from one group is provided with, and the setting of this group comprises: (a) non-filler in the recess; (b) form reflectance coating on the recess side, wherein, the material of reflectance coating is to select from one group of material, and this group material comprises that metal or nonmetal, metal comprise silver, aluminium, nickel, chromium, gold, etc., nonmetally comprise white PET, etc.; (c) reflecting object identical shaped with recess is set in the recess, the top of this reflecting object is equal substantially with the top of direct type light guide plate; (d) reflecting object identical shaped with recess is set in the recess, the top of this reflecting object is lower than the top of direct type light guide plate, fill the filler identical with the direct type light guide plate material or the thermal expansion factor filler smaller or equal to the direct type light guide plate material in the over top of reflecting object, the top of filler is equal substantially with the top of direct type light guide plate.Avoid above reflecting object, forming the dark space.The material of reflecting object is to select from one group of material, this group material comprises, metal material or nonmetallic materials, metal material comprises silver, aluminium, Deng, nonmetallic materials comprise the material that is equal to or less than the thermal expansion factor of direct type light guide plate with direct type light guide plate identical materials, thermal expansion factor, for nonmetallic materials, will form one deck reflective metal material or white PET material on its surface.
(18) 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 the polygonal summit of polygonal summit (Fig. 2 and Fig. 3 show tetragonal summit), periodic distribution (comprising the orthohexagonal summit of periodic distribution, the foursquare summit of periodic distribution, the vertex of a triangle of periodic distribution), non-periodic distribution (not showing in the drawings).
(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) 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), do 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).
(21) 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.
(22) 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%.
(23) 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.
(24) the light-emitting component weight in the LED-backlit source of employing direct type light guide plate and a plurality of stripe shape lamp plates is lighter.
(25) the light-emitting component good heat dissipation effect in the LED-backlit source of employing direct type light guide plate and single or multiple type lamp plates.
(26) for the light-emitting component 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 light-emitting component in the LED-backlit source of adopting direct type light guide plate and lamp plate.
(27) adopting the thickness of the light-emitting component in the LED-backlit source that direct type light guide plate and lamp plate form is the thickness that thickness that the thickness of direct type light guide plate adds the LED encapsulation adds circuit board, need not between direct type light guide plate and LED encapsulation, to keep big space, promptly realize slimming, carried out the light local area control again.A preferred embodiment: the thickness of the SMD encapsulation of LED surface launching is 0.5 millimeter, and the thickness of circuit board is 1 millimeter.
(28) thickness of direct type light guide plate depends on the dimension of the light output surface of LED encapsulation.
(29) structure of lamp plate comprises circuit board and LED encapsulation fixed thereon.Point type lamp plate (not showing in the drawings) comprises, a circuit board and a LED encapsulation fixed thereon.Stripe shape lamp plate (as line source) comprises, a strip circuit plate and at least two LED encapsulation that are arranged in straight line fixed thereon.Face type lamp plate (as area source) comprises, a face type circuit board and at least three LED encapsulation that are not arranged in straight line fixed thereon.
(30) LED encapsulation can be adopted the chip of a bill coloured light, also can adopt the chip of a plurality of bill coloured light.Monochromatic chip comprises ruddiness, blue light, green glow chip.The LED encapsulation also can emit white light.The filler of LED encapsulation has the single or multiple lift structure, and the material of each layer filler is to select from one group of material, and this group material comprises, transparency material, is mixed with the transparency material of fluorescent material.Transparency material is to select from one group of material, and this group material includes, but not limited to silica gel, epoxy resin.
Fig. 1 shows an embodiment of the direct type light guide plate that has recess in LED-backlit source formerly.
Fig. 1 a shows the schematic diagram of an embodiment of direct type light guide plate formerly.Direct type light guide plate is characterised in that, forms the recess 102 of 4 reverse taper shapes at the top of the inside of direct type light guide plate 101.
Fig. 1 b exploded view 1a shows the A-A sectional view of direct type light guide plate embodiment formerly.Form the recess 102 of reverse taper shape at the top of the inside of direct type light guide plate 101.
Fig. 2 shows that employing of the present utility model has the embodiment of light-emitting component of the direct type light guide plate of recess.Direct type light guide plate adopts the embodiment among Fig. 1, and direct type light guide plate has the site, but in order to simplify picture, among the embodiment of the direct type light guide plate in Fig. 2, does not all draw the site.Light-emitting component comprises single or multiple type lamp plates.
Fig. 2 a and Fig. 2 b show that respectively employing of the present utility model has the schematic diagram and the sectional view of embodiment of light-emitting component of the direct type light guide plate of recess.The light-emitting component of the employing direct type light guide plate that Fig. 2 a shows comprises direct type light guide plate 201 and face type lamp plate.Face type lamp plate comprises face type circuit board 206 and at least three not point-blank LED encapsulation 204 fixed thereon.Form at the top of the inside of direct type light guide plate 201 recess 202 and LED encapsulate 204 corresponding, recess 202 be shaped as the reverse taper shape.Substratum transparent 203 (only showing in Fig. 2 b) is bonding with recess 202 corresponding light inlet bottom surfaces the light output surface of the filler 205 of LED encapsulation 204 and direct type light guide plate, makes that LED encapsulation 204 is corresponding one by one with recess 202.Filler 205, substratum transparent 203 and the direct type light guide plate 201 of LED encapsulation 204 (for example have identical or close refraction coefficient, difference is 0-10%), substratum transparent 203 bonds together the light output surface of the filler 205 of LED encapsulation 204 and the corresponding light inlet bottom surface of direct type light guide plate 201, and making does not have air between the corresponding light inlet bottom surface of the light output surface of filler 205 and direct type light guide plate 201.
Preferred embodiment: filler 205, substratum transparent 203 and direct type light guide plate 201 have identical refraction coefficient, light sends from the chip of LED encapsulation 204, through filler 205 and substratum transparent 203, enter direct type light guide plate 201, light does not have a total internal reflection at the interface between filler 205 and substratum transparent 203, light not reflecting at the interface between the light inlet bottom surface of substratum transparent 203 and direct type light guide plate 201 do not have total internal reflection yet, thereby the feasible light that arrives the light output surface of filler 205 all enters direct type light guide plate 201.
LED encapsulates 204 issued lights and enters direct type light guide plate 201 by the bottom, penetrate on the 202a of the side of recess 202, under the effect of recess 202, the main component 220 of light is in the direction propagation almost parallel with the light output surface 201a of direct type light guide plate 201 of the edge, inside of direct type light guide plate 201.Simultaneously, the site is reflected the light that is mapped on it to the top of direct type light guide plate (light output surface).
Fig. 3 shows that the employing in LED-backlit of the present utility model source has another embodiment of light-emitting component of the direct type light guide plate of recess.Direct type light guide plate has the site, but in order to simplify picture, among the embodiment of the direct type light guide plate in Fig. 3, does not all draw the site.The embodiment of the light-emitting component that Fig. 3 shows is substantially the same with the embodiment of the light-emitting component that Fig. 2 shows, unique difference is: the lamp plate that the light-emitting component that Fig. 2 shows adopts is a face type lamp plate, and the lamp plate that the light-emitting component that Fig. 3 shows adopts is at least one stripe shape lamp plate.
Show an embodiment of light-emitting component among Fig. 3, comprise two stripe shape lamp plates, a light-emitting component can comprise a plurality of stripe shape lamp plates.Fig. 3 a and Fig. 3 b show that respectively the employing in LED-backlit of the present utility model source has the schematic diagram and the sectional view of embodiment of light-emitting component of the direct type light guide plate of recess.The light-emitting component of the direct type light guide plate that Fig. 3 a shows comprises direct type light guide plate 301 and stripe shape lamp plate.The stripe shape lamp plate comprises stripe shape circuit board 306 and at least two LED encapsulation 304 point-blank fixed thereon.LED encapsulation 304 be bonded in direct type light guide plate 301 by substratum transparent 303 with recess 302 corresponding bottom surfaces on.
Notice that among (1) Fig. 2 and Fig. 3, recess is distributed in tetragonal summit on the direct type light guide plate, forms a luminescence unit.The distribution of recess on direct type light guide plate can be other shapes, for example, triangle, hexagon, etc.A light-emitting component comprises at least one luminescence unit, for the light-emitting component that comprises a plurality of luminescence units, and a plurality of luminescence unit periodic distribution or periodic arrangement.(2) shape of the bottom surface of recess includes, but not limited to circle and polygon.
Fig. 4 a shows the top view of the embodiment of the distribution of recess on direct type light guide plate.Recess 402 is distributed in the tetragonal summit of periodic distribution on direct type light guide plate 401, dotted line 440 connects together 4 recesses, represent that these 4 recesses constitute a luminescence unit, the luminescence unit that comprises a plurality of periodic distribution on the direct type light guide plate 401, two adjacent luminescence units are shared a pair of recess.Correspondingly, the LED encapsulation also is distributed in the tetragonal summit of identical periodic distribution, makes that the LED encapsulation is corresponding one by one with recess.
Fig. 4 b shows the top view of the embodiment of the distribution of recess on direct type light guide plate.Recess 402 is distributed in the summit of the triangle of periodic distribution on direct type light guide plate 401, dotted line 440 connects together 3 recesses, represent that these 3 recesses constitute a luminescence unit, the luminescence unit that comprises a plurality of periodic distribution on the direct type light guide plate 401, two adjacent luminescence units are shared a pair of recess.Correspondingly, be distributed in the summit of the triangle of identical periodic distribution in the LED encapsulation also.
Fig. 5 shows the schematic diagram of embodiment of the reverse taper shape of recess.Fig. 5 a shows that the shape of recess is the schematic diagram of the shape of falling the triangular pyramid 502.The bottom surface 502a of the shape of falling the triangular pyramid 502 is a triangle, represents bottom surface 502a with a filling pattern.Fig. 5 b shows that the shape of recess is the schematic diagram of the shape of falling the rectangular pyramid 502.The bottom surface 502b of the shape of falling the rectangular pyramid 502 is a quadrangle, represents bottom surface 502b with a filling pattern.Fig. 5 c shows that the shape of recess is the schematic diagram of the shape of falling the hexagonal pyramid 502.The bottom surface 502c of the shape of falling the hexagonal pyramid 502 is a hexagon, represents bottom surface 502c with a filling pattern.The shape of recess can also be other reverse taper shapes.
The embodiment of the side in the cross section of the recess of Fig. 6 a to Fig. 6 f displaying direct type light guide plate.Direct type light guide plate 601 is characterised in that, forms reverse taper shaped recess 602 at the top of the inside of direct type light guide plate 601.
Fig. 6 a and Fig. 6 b show the embodiment of side in cross section of the recess of direct type light guide plate 601, it is characterized in that, form recess 602z at the top of the inside of direct type light guide plate 601, and the side 603z in the cross section of recess 602z is a straight line.Direct type light guide plate 601 has top 601a and bottom 601b.The schematic diagram of the embodiment of the recess 602z that Fig. 6 b exploded view 6a shows, wherein, the bottom surface 602a of recess 602z is shaped as circle, and bottom surface 602a has diameter 602d, and recess 602z has high 602e (distance from the summit 602f of recess 602z to bottom surface 602a).The side 603z in the cross section of recess 602z is a straight line.The cross section of recess is by the summit face vertical with the bottom surface.
An embodiment, the angle between high 602e and the side 603z equals 45 °.
Fig. 6 c shows the embodiment of the recess 602q at the top that is formed on direct type light guide plate 601 inside, it is characterized in that the side 603q in the cross section of recess 602q is a curve.The schematic diagram of the embodiment of the recess 602q that Fig. 6 d exploded view 6c shows, wherein, the bottom surface 602a of recess 602q is shaped as circle, and the side 603q in the cross section of recess 602q is a curve.
Fig. 6 e shows the sectional view of the embodiment of recess 602t, it is characterized in that the side 603t in the cross section of recess 602t is a broken line.The schematic diagram of the embodiment of the recess 602t that Fig. 6 f exploded view 6e shows, wherein, the bottom surface 602a of recess 602t is shaped as circle, and the side 603t in the cross section of recess 602t is a broken line.
The shape of the bottom surface of the recess that Fig. 6 shows can be chosen wantonly, is not limited to the shape shown in the figure.
Fig. 7 a shows the embodiment of setting of the recess 702 at the top be formed on direct type light guide plate 701 inside, it is characterized in that, applies reflectance coating 707 on the side of recess 702.
Fig. 7 b shows the embodiment of setting of the recess at the top be formed on direct type light guide plate 701 inside, it is characterized in that, a reflecting object 708 identical shaped with recess is set in recess, and the top 708a of this reflecting object 708 is equal substantially with the top 701a of direct type light guide plate 701.
Fig. 7 c shows the embodiment of setting of the recess at the top be formed on direct type light guide plate 701 inside, it is characterized in that, a reflecting object 709 identical shaped with recess is set in recess, its top is lower than the top 701a of direct type light guide plate 701, fill and the filler 710 of direct type light guide plate 701 same materials or the filler 710 that thermal expansion factor is equal to or less than direct type light guide plate 701 in the over top of reflecting object 709, the top 710a of filler 710 is equal substantially with the top 701a of direct type light guide plate 701.Therefore, can avoid the dark space of reflecting object 709 tops.
Fig. 8 a shows an embodiment of the setting of direct type light guide plate 801, it is characterized in that, and except that the side of recess 802, top coating one deck scattering particles 801a of direct type light guide plate 801.
Fig. 8 b shows an embodiment of the setting of direct type light guide plate 801b, it is characterized in that the inside doping light diffusing particles of direct type light guide plate 801b has recess 802.
Fig. 8 c shows an embodiment of the setting of direct type light guide plate, it is characterized in that, and the inside doping light diffusing particles of direct type light guide plate 801b, top coating one deck scattering particles 801a of direct type light guide plate 801b has recess 802.
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 (10)
1. the employing in a LED-backlit source has the light-emitting component of the direct type light guide plate of recess, comprises LGP, at least one lamp plate and substratum transparent; It is characterized in that the recess of at least one reverse taper shape is formed on the top of the inside of described LGP; The bottom surface of described LGP has the site; Described lamp plate comprises circuit board and at least one LED encapsulation that is fixed on the described circuit board; Described LED encapsulation comprises support, at least one led chip and filler; Wherein, described support has groove, and described led chip is fixed on the described support, and described filler is filled in the described groove and covers described led chip; Described substratum transparent is bonded in the light output surface of described filler on the bottom of described LGP and the corresponding position of described recess, makes that described LED encapsulation is corresponding one by one with described recess.
2. the light-emitting component in the LED-backlit source of claim 1 is characterized in that, the material of described substratum transparent is to select from one group of material, and this group material comprises, silica gel, silicone adhesive, epoxy resin.
3. the light-emitting component in the LED-backlit source of claim 1 is characterized in that, the shape of the bottom surface of described recess is to select from one group of shape, and this group shape comprises: (1) circle; (2) polygon.
4. the light-emitting component in the LED-backlit source 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: straight line, curve, broken line.
5. the light-emitting component in the LED-backlit source of claim 1 is characterized in that, the setting in the described recess is to select from one group is provided with, and the setting of this group comprises: non-filler in (1) described recess; (2) form one deck reflectance coating on the side of described recess; (3) reflecting object identical shaped with recess is set in the described recess, the top of described reflecting object is equal substantially with the top of described LGP; (4) reflecting object identical shaped with recess is set in the recess, the top of described reflecting object is lower than the top of described LGP, fill and the filler of described LGP same material or the filler that thermal expansion factor is equal to or less than described LGP the top at the top of described reflecting object, and the top of described filler is equal substantially with the top of described LGP.
6. the light-emitting component in the LED-backlit source 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, (1) polygonal summit; (2) the polygonal summit of periodic distribution; (3) non-periodic distribution.
7. the light-emitting component in the LED-backlit source 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.
8. the light-emitting component in the LED-backlit source of claim 1 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 LGP that (1) is transparent; (2) the inside doping light diffusing particles of described LGP; (3) top coating one deck light diffusing particles of described LGP; (4) the inside doping light diffusing particles of described LGP and top coating one deck light diffusing particles.
9. the light-emitting component in the LED-backlit source of claim 1 is characterized in that, described led chip is to select from one group of led chip, and this core assembly sheet comprises, red light chips, blue chip, green glow chip; Described filler has the single or multiple lift structure, and the material of each layer filler is to select from one group of material, and this group material comprises, transparency material, is mixed with the transparency material of fluorescent material; Described transparency material is to select from one group of material, and this group material comprises, silica gel, epoxy resin.
10. the light-emitting component in the LED-backlit source of claim 1 is characterized in that, the shape of described lamp plate is to select from one group of shape, and this group shape comprises, some type lamp plate, stripe shape lamp plate and face type lamp plate; Wherein, described some type lamp plate comprises, a circuit board and a LED encapsulation fixed thereon; Described stripe shape lamp plate comprises, a strip circuit plate and at least two LED encapsulation that are arranged in straight line fixed thereon; Described type lamp plate comprises, a face type circuit board and at least three LED encapsulation that are not arranged in straight line fixed thereon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202763420U CN201593724U (en) | 2009-12-05 | 2009-12-05 | Luminous element adopting direct light guide plate with concave part of LED backlight source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202763420U CN201593724U (en) | 2009-12-05 | 2009-12-05 | Luminous element adopting direct light guide plate with concave part of LED backlight source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201593724U true CN201593724U (en) | 2010-09-29 |
Family
ID=42775791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202763420U Expired - Fee Related CN201593724U (en) | 2009-12-05 | 2009-12-05 | Luminous element adopting direct light guide plate with concave part of LED backlight source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201593724U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102767751A (en) * | 2012-06-18 | 2012-11-07 | 创维液晶器件(深圳)有限公司 | Backlight module and display device including backlight module |
| CN104272009A (en) * | 2012-04-30 | 2015-01-07 | 高通Mems科技公司 | Array illumination system |
| CN105074945A (en) * | 2013-03-29 | 2015-11-18 | 皇家飞利浦有限公司 | Light emitting device comprising wavelength converter |
| CN105388555A (en) * | 2014-08-20 | 2016-03-09 | 三菱电机株式会社 | Surface light source device and liquid crystal display device |
| CN109031510A (en) * | 2018-08-24 | 2018-12-18 | 京东方科技集团股份有限公司 | A kind of light guide plate and preparation method thereof, backlight module and display device |
| CN109445180A (en) * | 2018-10-31 | 2019-03-08 | 厦门天马微电子有限公司 | A kind of backlight module and display device |
| CN113075815A (en) * | 2020-01-06 | 2021-07-06 | 中强光电股份有限公司 | Light source module |
| CN113820887A (en) * | 2021-09-06 | 2021-12-21 | 苏州天禄光科技股份有限公司 | Straight following formula even worn-out fur of mini LED and including backlight unit of this even worn-out fur |
| WO2022111679A1 (en) * | 2020-11-30 | 2022-06-02 | 华为技术有限公司 | Backlight module and display screen |
-
2009
- 2009-12-05 CN CN2009202763420U patent/CN201593724U/en not_active Expired - Fee Related
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104272009A (en) * | 2012-04-30 | 2015-01-07 | 高通Mems科技公司 | Array illumination system |
| CN104272009B (en) * | 2012-04-30 | 2018-06-01 | 追踪有限公司 | Array irradiation system |
| CN102767751B (en) * | 2012-06-18 | 2015-03-18 | 创维液晶器件(深圳)有限公司 | Backlight module and display device including backlight module |
| CN102767751A (en) * | 2012-06-18 | 2012-11-07 | 创维液晶器件(深圳)有限公司 | Backlight module and display device including backlight module |
| CN105074945A (en) * | 2013-03-29 | 2015-11-18 | 皇家飞利浦有限公司 | Light emitting device comprising wavelength converter |
| CN105074945B (en) * | 2013-03-29 | 2018-02-02 | 飞利浦照明控股有限公司 | Luminaire including wavelength shifter |
| CN105388555A (en) * | 2014-08-20 | 2016-03-09 | 三菱电机株式会社 | Surface light source device and liquid crystal display device |
| CN105388555B (en) * | 2014-08-20 | 2019-05-28 | 三菱电机株式会社 | Planar light source device and liquid crystal display device |
| US10782469B2 (en) | 2018-08-24 | 2020-09-22 | Boe Technology Group Co., Ltd. | Light guide plate and its fabricating method, as well as backlight module |
| CN109031510A (en) * | 2018-08-24 | 2018-12-18 | 京东方科技集团股份有限公司 | A kind of light guide plate and preparation method thereof, backlight module and display device |
| CN109031510B (en) * | 2018-08-24 | 2020-06-30 | 京东方科技集团股份有限公司 | Light guide plate and manufacturing method thereof, backlight module and display device |
| CN109445180A (en) * | 2018-10-31 | 2019-03-08 | 厦门天马微电子有限公司 | A kind of backlight module and display device |
| CN109445180B (en) * | 2018-10-31 | 2022-06-10 | 厦门天马微电子有限公司 | Backlight module and display device |
| CN113075815A (en) * | 2020-01-06 | 2021-07-06 | 中强光电股份有限公司 | Light source module |
| CN113075815B (en) * | 2020-01-06 | 2024-02-02 | 中强光电股份有限公司 | Light source module |
| WO2022111679A1 (en) * | 2020-11-30 | 2022-06-02 | 华为技术有限公司 | Backlight module and display screen |
| CN113820887A (en) * | 2021-09-06 | 2021-12-21 | 苏州天禄光科技股份有限公司 | Straight following formula even worn-out fur of mini LED and including backlight unit of this even worn-out fur |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201593724U (en) | Luminous element adopting direct light guide plate with concave part of LED backlight source | |
| CN201680228U (en) | Light-emitting component of LED backlight source adopting light guide plate with V-shaped groove | |
| US20110134626A1 (en) | Illumination system using phosphor remote form light source | |
| US8172447B2 (en) | Discrete lighting elements and planar assembly thereof | |
| CN101369619B (en) | Surface labeling type LED component and LED back light module unit | |
| CN201661930U (en) | Light-emitting element of LED side-light type backlight source | |
| CN101639181A (en) | Direct type backlighting system | |
| CN100587567C (en) | LED back light module | |
| CN201526868U (en) | Direct type backlight system | |
| JP2006148036A (en) | Light emitting source and light emitting source array | |
| CN201425257Y (en) | Led light source device | |
| CN201599653U (en) | Light-emitting element adopting direct-type light-guiding plate with reflecting object array of LED backlight source | |
| CN101561085A (en) | Wide-angle LED light source | |
| CN108845461B (en) | Backlight module and liquid crystal display device | |
| CN201680225U (en) | Hybrid light-emitting component of LED backlight source | |
| CN101228464A (en) | Illumination device | |
| CN213395154U (en) | Backlight lens applied to thin display | |
| CN201803317U (en) | Direct type light guide plate, with groove at the bottom, of LED backlight module | |
| CN101532642B (en) | Luminescence unit | |
| CN201739957U (en) | Light guide plate with V-shaped groove of LED backlight source | |
| CN201715364U (en) | Luminescent element of light guide plate with new structure of LED backlight | |
| CN102062355A (en) | Direct illumination type light guide plate of light-emitting diode (LED) backlight | |
| US10782469B2 (en) | Light guide plate and its fabricating method, as well as backlight module | |
| CN101520570A (en) | Light emitting device, backlight module and a flat panel display | |
| CN201795430U (en) | Bottom lighting light guide plate of LED backlight module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100929 Termination date: 20121205 |