CN101075605B - Structure for packing light-emitting diodes, backlight module and liquid crystal display device thereof - Google Patents
Structure for packing light-emitting diodes, backlight module and liquid crystal display device thereof Download PDFInfo
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- CN101075605B CN101075605B CN2006100819973A CN200610081997A CN101075605B CN 101075605 B CN101075605 B CN 101075605B CN 2006100819973 A CN2006100819973 A CN 2006100819973A CN 200610081997 A CN200610081997 A CN 200610081997A CN 101075605 B CN101075605 B CN 101075605B
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Abstract
A LBD packing structure includes a base, noumenon and several LBD. The noumenon is installed on the base with a circle groove on one side. LBD are fixed in the groove to supply a lateral light for the packing structure. The invention also provides an optical pipe which includes a column and several prisms. The column is of an outer side and an inner reflecting side. The prisms are installed in between the outer and inner sides. By combining the LBD package and the optical pipe, the package is capable of generating diffusion light and be used in apheliotropic module and LCD displayer.
Description
Technical field
The present invention relates to a kind of module backlight and use the liquid crystal indicator of this module backlight, but relate in particular to a kind of lateral direction light emission package structure for LED and can be with the ring-like light guiding for the light pipe of the light of similar fluorescent tube with use the module backlight and the liquid crystal indicator of this light pipe.
Background technology
Along with the liquid crystal indicator manufacturing technology is progressive fast, with and possess frivolous, power saving and advantage such as radiationless arranged, make LCD be applied in large quantities personal digital assistant (personal digitalassistant, PDA), in the various electronic products such as notebook computer, digital camera, Digital Video, mobile phone, computer screen and LCD TV.Add the positive input research and development of industry and adopt the production equipment that maximizes, the quality of liquid crystal indicator is constantly promoted, and the lasting decline of price, therefore make the application of liquid crystal indicator enlarge rapidly.But, need could produce the function that shows by the light that module backlight provided because the display panels in the liquid crystal indicator is the display panel of non-self-luminosity.Wherein, traditional module backlight system with cold cathode fluorescent lamp pipe or hot-cathode fluorescent light tube as light source.
Yet,, be difficult for resource after permanent the use to reclaim, and cause environmental pollution easily because cold cathode fluorescent lamp pipe or hot-cathode fluorescent light tube have the material of hostile environment such as mercury.In addition, surging and red-hot along with global environmental consciousness, and the modern stresses for electronic product under the trend that can resource reclaims, and with mercurous cold cathode fluorescent lamp pipe or the hot-cathode fluorescent light tube module backlight as light source, will seem does not quite conform with environmental protection.Thus, will reduce the practicality of module backlight and liquid crystal indicator widely.
Summary of the invention
In view of this, purpose of the present invention is exactly to provide a kind of package structure for LED and light pipe and application its module backlight and liquid crystal indicator.But the package structure for LED that is somebody's turn to do lateral direction light emission sees through the effect of light pipe for light, can be as the fluorescent tube scattered beam.As seen, the light source module that package structure for LED of the present invention and light pipe are arranged in pairs or groups and formed is broken away from the yoke of the design of traditional light source widely.In addition, the light source module that module application package structure for LED backlight of the present invention and light pipe are arranged in pairs or groups and formed can shorten the light mixing distance between package structure for LED and the diffuser plate.Thus, can reduce the thickness of module backlight greatly, and then improve the practicality of module backlight and liquid crystal indicator.In addition, package structure for LED can directly be substituted on module backlight via the through hole of framework, seems quite convenient.Moreover present embodiment uses light-emitting diode chip for backlight unit with as light source, can exempt the resource that faces as fluorescent tube and reclaim difficulty and mercury pollution problem of environment, quite meets the environmental protection demand.
According to purpose of the present invention, a kind of package structure for LED is proposed, comprise a base, a body and several light-emitting diode chip for backlight unit.Body is arranged on the base, and has a side, and this side has an edge around groove.These light-emitting diode chip for backlight unit are arranged at this edge ring on the bottom land of groove, in order to the side direction light of package structure for LED to be provided.
According to another object of the present invention, a kind of light pipe is proposed, comprise a cylinder and several prism structures.Cylinder has in a peripheral sides and one and encloses reflecting surface, in enclose reflecting surface in order to reflection ray.These prism structures be arranged at peripheral sides and in enclose between the reflecting surface, in order to interfere the light that light pipe received.
According to another purpose of the present invention, a kind of module backlight is proposed, comprise a framework, a light pipe and a package structure for LED.Framework has a base plate and side plate, and base plate and side plate define an accommodation space.Light pipe comprises a cylinder and several prism structures, and cylinder is arranged in the accommodation space, and is positioned on the base plate.Cylinder has in a peripheral sides and one and encloses reflecting surface, in enclose reflecting surface in order to reflection ray.These prism structures be arranged at peripheral sides and in enclose between the reflecting surface, in enclose reflecting surface in order to reflection ray, in order to interfere the light that light pipe received.Package structure for LED comprises a base, a body, several first light-emitting diode chip for backlight unit and several second light-emitting diode chip for backlight unit, and base is arranged on the base plate.Body is arranged on the base, and run through peripheral sides and in be inserted in the cylinder after enclosing reflecting surface.Body has one first side and one second side, first side and second side have respectively one first edge ring around groove and one second edge ring around groove.These first light-emitting diode chip for backlight unit are arranged at first edge ring on the bottom land of groove, in order to emitting side to light to an end of light pipe.These second light-emitting diode chip for backlight unit are arranged at second edge ring on the bottom land of groove, in order to emitting side to light to the other end of light pipe.
According to a further object of the present invention, a kind of liquid crystal indicator is proposed, comprise a module backlight, one first Polarizer, a display panels and one second Polarizer.Module backlight comprises a framework, a light pipe and a package structure for LED.Framework has a base plate and side plate, and base plate and side plate define an accommodation space.Light pipe comprises a cylinder and several prism structures, and cylinder is arranged in the accommodation space, and is positioned on the base plate.Cylinder has in a peripheral sides and one and encloses reflecting surface, in enclose reflecting surface in order to reflection ray.These prism structures be arranged at peripheral sides and in enclose between the reflecting surface, in enclose reflecting surface in order to reflection ray, in order to interfere the light that light pipe received.Package structure for LED comprises a base, a body, several first light-emitting diode chip for backlight unit and several second light-emitting diode chip for backlight unit, and base is arranged on the base plate.Body is arranged on the base, and run through peripheral sides and in be inserted in the cylinder after enclosing reflecting surface.Body has one first side and one second side, first side and second side have respectively one first edge ring around groove and one second edge ring around groove.These first light-emitting diode chip for backlight unit are arranged at first edge ring on the bottom land of groove, in order to emitting side to light to an end of light pipe.These second light-emitting diode chip for backlight unit are arranged at second edge ring on the bottom land of groove, in order to emitting side to light to the other end of light pipe.First Polarizer is arranged on the module backlight, and display panels is arranged on first Polarizer, and second Polarizer is arranged on the display panels.
Description of drawings
Further specify the features and advantages of the present invention below in conjunction with the drawings and specific embodiments, wherein:
Figure 1A illustrates the front elevation according to the package structure for LED of embodiments of the invention one;
Figure 1B illustrates the side view of the package structure for LED of Figure 1A;
Fig. 1 C illustrates the base of package structure for LED of Figure 1A and the stereographic map of body;
The front elevation of the state the when light emitting diode construction that Fig. 1 D illustrates Figure 1A also comprises phosphor powder and colloid;
The rear view of the state the when light emitting diode construction that Fig. 1 E illustrates Figure 1A also comprises phosphor powder and colloid;
Fig. 2 A illustrates the stereographic map according to the light pipe of embodiments of the invention two;
It is to cut open the plane and the sectional view of the light pipe looked toward light pipe by-x direction that Fig. 2 B illustrates yz plane with Fig. 2 A;
It is to cut open the plane and the amplification profile of the light pipe looked toward light pipe by-y direction that Fig. 2 C illustrates xz plane with Fig. 2 A;
Fig. 2 D illustrate Fig. 2 B in the synoptic diagram of state when enclosing reflecting surface and in cylinder, forming by reflection tube;
Fig. 3 illustrates the sectional view according to the light pipe of embodiments of the invention three;
Fig. 4 A illustrates the stereographic map according to the light pipe of embodiments of the invention four;
It is to cut open the plane and the sectional view of the light pipe looked toward light pipe by-x direction that Fig. 4 B illustrates yz plane with Fig. 4 A;
Fig. 5 illustrates the stereographic map according to the light pipe of embodiments of the invention five;
Fig. 6 illustrates the sectional view according to the light pipe of embodiments of the invention six;
Fig. 7 illustrates the sectional view according to the light pipe of embodiments of the invention seven;
Fig. 8 illustrates the sectional view according to the light pipe of embodiments of the invention eight;
Fig. 9 A illustrates the synoptic diagram according to the module backlight of embodiments of the invention nine;
Fig. 9 B illustrates the combination stereogram of framework, package structure for LED and the light pipe of Fig. 9 A;
The side view of the state when Fig. 9 C illustrates the package structure for LED of Fig. 9 B and light pipe and makes up on framework;
The enlarged diagram of the subregion when Fig. 9 D illustrates the package structure for LED of Fig. 9 C and light pipe and makes up on framework;
Fig. 9 E illustrates the synoptic diagram of the framework of Fig. 9 B;
Figure 10 A illustrates the synoptic diagram according to the module backlight of embodiments of the invention ten;
Figure 10 B～10C illustrates two decomposing schematic representations of package structure for LED, framework and the light pipe of Figure 10 A;
Figure 10 D illustrates the stereographic map of the framework of Figure 10 A; And
Figure 11 illustrates the synoptic diagram according to the liquid crystal indicator of embodiments of the invention 11.
10: package structure for LED
11: base
12: body
12a: first side
12b: second side
12c: first edge ring is around groove
12d: second limit is former in groove
13a: first light-emitting diode chip for backlight unit
13b: second light-emitting diode chip for backlight unit
14,23: reflecting material
15: phosphor powder
16: colloid
20a, 20b, 20c, 20d, 20e, 20f, 20g: light pipe
21: cylinder
21a: peripheral sides
21b: in enclose reflecting surface
21c: perforation
22a, 22b, 22c, 22d, 22e, 22f, 22g: prism structure
24: reflection tube
90,100: module backlight
91,101: framework
91a, 101a: base plate
91b, 101b: side plate
91c, 101c: accommodation space
91d: top board
91e, 101e: through hole
97,107: reflector plate
98,108: diffuser plate
99,109: optic film set
106: light guide plate
106a: first surface
106b: second surface
106c: the 3rd surface
106d: site
110: liquid crystal indicator
111: the first Polarizers
112: display panels
113: the second Polarizers
Embodiment
Embodiment one
Please be simultaneously with reference to Figure 1A～1E, Figure 1A illustrates the front elevation according to the package structure for LED of embodiments of the invention one, and Figure 1B illustrates the side view of the package structure for LED of Figure 1A.Fig. 1 C illustrates the base of package structure for LED of Figure 1A and the stereographic map of body, the rear view of the state the when light emitting diode construction that the front elevation of the state the when light emitting diode construction that Fig. 1 D illustrates Figure 1A also comprises phosphor powder and colloid, Fig. 1 E illustrate Figure 1A also comprises phosphor powder and colloid.
Shown in Figure 1A～1B, package structure for LED 10 comprises a base 11, a body 12 and several first light-emitting diode chip for backlight unit 13a.Body 12 is arranged on the base 11, and has one first side 12a, and the first side 12a has an edge around groove 12c.The first light-emitting diode chip for backlight unit 13a is arranged at first edge ring on the bottom land of groove 12c, in order to the one-sided to light of package structure for LED 10 to be provided, as the side direction light of+y direction.Wherein, package structure for LED 10 can send the one-sided to light of ring-type at least.
Wherein, body 12 can be a right cylinder or a polygon cylinder, is that example explains with the right cylinder at this.In addition, the first light-emitting diode chip for backlight unit 13a comprises the matched combined of white led chip or redness (R), green (G) and blue (B) light-emitting diode chip for backlight unit, and the first light-emitting diode chip for backlight unit 13a can be staggered up and down corresponding arrangement of the orders such as RGB of the linear array of order such as the RGB of delegation or two row.In addition, body 12 comprises Heat Conduction Material, reflecting material or stupalith, and base 12 comprises radiator structure (heat sink), uses for package structure for LED 10 heat conducting and radiatings and uses.And base 12 and body 12 can be integrated structures.Moreover on the base 12 or inside also has a circuit board, and circuit board uses positive and negative extreme and a power supply or the converter (converter) for the first light-emitting diode chip for backlight unit 13a to electrically connect, and above-mentioned circuit board can be flexible circuit board or printed circuit board (PCB).
In addition, shown in Fig. 1 C, package structure for LED 10 also comprises a reflecting material 14, and reflecting material 14 is arranged at first edge ring on the cell wall of groove 12c, and reflecting material 14 for example is aluminium or silver-colored contour reflective metal or metal alloy.In addition, shown in Fig. 1 D, package structure for LED 10 also comprises at least one phosphor powder 15 and colloid 16, and phosphor powder 15 is coated on the first light-emitting diode chip for backlight unit 13a.Colloid 16 is filled in first edge ring in groove 12c, and covers the first light-emitting diode chip for backlight unit 13a and phosphor powder 16.For example, the first light-emitting diode chip for backlight unit 13a comprises blue led chips, and phosphor powder 15 comprises yellow phosphor powder.Therefore, the blue light that blue led chips is sent promptly produces white light after running into yellow phosphor powder, and then package structure for LED 10 can send one-sided to white light at least.
Have a variety ofly as for the collocation of the first light-emitting diode chip for backlight unit 13a and phosphor powder 15, for example blue LED collocation green and red fluorescent powder, violet light diode chip for backlight unit collocation green and red fluorescent powder or the collocation of violet light diode chip for backlight unit are red, green and blue-fluorescence powder.Moreover colloid 16 comprises epoxy resin (epoxy), polymethylmethacrylate (poly (meihyl methacrylate), PMMA, be commonly called as acryl), polycarbonate (polycarbonate, PC) or white colloid, not influence the luminescent properties of package structure for LED 10.
Shown in Fig. 1 E, body 12 also has one second side 12b with respect to the first side 12a, and the second side 12b also has one second edge circle zone 12d corresponding to the first edge circle zone 12b.Package structure for LED 10 also comprises several second light-emitting diode chip for backlight unit 13b, and the second light-emitting diode chip for backlight unit 13b is arranged among the second edge circle zone 12d.The second light-emitting diode chip for backlight unit 13b is in order to providing the one-sided to light of package structure for LED 10, as the side direction light of-y direction.Therefore, package structure for LED 10 can send bilateral to light.Wherein, second edge ring also can have another reflecting material on the cell wall of groove 12d, also can be coated with another phosphor powder on the second light-emitting diode chip for backlight unit 13b, and the second light-emitting diode chip for backlight unit 13a and on phosphor powder also can be filled in the colloid of second edge ring in groove 12d and cover by another.In addition, the second light-emitting diode chip for backlight unit 13b comprises the matched combined of white led chip or redness (R), green (G) and blue (B) light-emitting diode chip for backlight unit, and the second light-emitting diode chip for backlight unit 13b can be staggered up and down corresponding arrangement of the orders such as RGB of the linear array of order such as the RGB of delegation or two row.In addition, the positive and negative extreme of the second light-emitting diode chip for backlight unit 13b also can see through on the base plate 12 or inner circuit board and power supply or converter electric connection.
Embodiment two
Please be simultaneously with reference to Fig. 2 A～2C, Fig. 2 A illustrates the stereographic map according to the light pipe of embodiments of the invention two.It is to cut open the plane and the sectional view of the light pipe looked toward light pipe by+x direction that Fig. 2 B illustrates yz plane with Fig. 2 A, and it is to cut open the plane and the amplification profile of the light pipe looked toward light pipe by+y direction that Fig. 2 C illustrates xz plane with Fig. 2 A.Shown in Fig. 2 A～2C, light pipe 20a is in order to receive the light that a light source sent and to carry out the light interference effect in the one termination at least.Light pipe 20a comprises a cylinder 21 and several prism structures 22a.Cylinder 21 has in a peripheral sides 21a and one and encloses reflecting surface 21b, in enclose the light that reflecting surface 21b is received in order to reflection light pipe 20a.Prism structure 22a be arranged at peripheral sides 21a and in enclose between the reflecting surface 21b, in order to the light of interfering light pipe 20a to be received, make light pipe 20a scatter light to extraneous via peripheral sides 21a.Wherein, cylinder 21 and prism structure 22a can be integrated structures, and cylinder 21 can be right cylinder or polygon cylinder, are that example explains with the right cylinder at this.
In the present embodiment, prism structure 22a is arranged on the peripheral sides 21a, and prism structure 22a comprises several sites, and these sites can be salient point.Suppose that light source is positioned at the end of light pipe 20a, though be that example explains in this site with the homogeneous size, for the distribution situation of prism structure 22a on peripheral sides 21a of site is not confined to this.For example, with the y direction, for the prism structure 22a of site more near this light source place, the size of site can be more little, and the calibration of site is thinner.Therefore, can make incident ray can arrive effective range of application of light pipe 20a equably.And getting over away from this light source place, the size of site can be big more, and the distribution of site is closeer, makes that the scattering area of incident ray is bigger.Therefore, can strengthen the refraction effect of light pipe 20a for incident ray.In the present embodiment, though for the prism structure 22a of site in the even distribution of being distributed as of x direction, for the prism structure 22a of site can suitably adjust according to practical application in the distribution of x direction.Therefore, can reach the control of the light intensity of special angle.In addition, above-mentioned is that the prism structure 22a of site can be circle or polygon, is that example explains with the circle at this.And the light pipe 20a of present embodiment can be made by optical grade acryl (PMMA) or polycarbonate pc (PC), and light pipe 20a can be solid construction or hollow structure.
As for interior generation type of enclosing reflecting surface 21b, be simply described as follows at this, but the technology of present embodiment is not confined to this.For example, cylinder 21 also has a perforation 21c, and light pipe 20a also comprises a reflecting material 23.Reflecting material 23 is arranged on the inwall of perforation 21c, encloses reflecting surface 21b to form in cylinder 21 in above-mentioned.
Please refer to Fig. 2 D, its illustrate Fig. 2 B in the synoptic diagram of state when enclosing reflecting surface and in cylinder, forming by reflection tube.Light pipe 20a also comprises a reflection tube 24, and reflection tube 24 inserts in the perforation 21c along the direction of arrow, encloses reflecting surface 21b to form in cylinder 21 in above-mentioned.Wherein, cylinder 21 can be adorned reflection tube 24 earlier in mould, remake the secondary injection molding, so that cylinder 21 and reflection tube 24 is one-body molded.Or reflection tube 24 can be that the reflector plate that cuts is rolled up folded forming, behind cylinder 21 injection moldings with cylinder 21 one-body molded and setting.
When light pipe 20a is hollow structure, then can in a tubing string, imbed another tubing string, in mould, do to form light pipe 20a behind the secondary injection molding.Or, extruding earlier the plates that are shaped, this plates surface has prism structure 22a, towards the mode in the external world plates bending is formed light pipe 20a with prism structure 22a again.In addition, the prism structure 22a for the site can see through injection molding, printing, extrude or roll modes such as printing ink and be formed on the peripheral sides 21a of cylinder 21.
In the light pipe 20a of present embodiment because peripheral sides 21a is provided with prism structure 22a, make light pipe 20a go for any corresponding to peripheral sides 21a and in enclose the ring-type light source in zone between the reflecting surface 21b.For example, when the peripheral sides 21a of light pipe 20a and in enclose zone between the reflecting surface 21b corresponding to first edge ring of the package structure for LED 10 of embodiment one during around groove 12c, the side direction light of the ring-type that package structure for LED 10 is sent can via the peripheral sides 21a of light pipe 20a and in the zone of enclosing between the reflecting surface 21b enter light pipe 20a.Therefore, see through prism structure 22a, in enclose reflecting surface 21b and cylinder 21 materials own for the effect of light, make light pipe 20a scatter light to extraneous via peripheral sides 21a.So the light pipe 20a of present embodiment can be adjusted into the light that similar fluorescent tube sends with the package structure for LED 10 of embodiment one or the ring-like light of other light sources.
Embodiment three
Please refer to Fig. 3, it illustrates the sectional view according to the light pipe of embodiments of the invention three.What the light pipe 20b of present embodiment was different with the light pipe 20a of embodiment two is in prism structure 22b, continues to continue to use label as for other identical constitutive requirements, and repeats no more.
Shown in 3 figure, though the prism structure 22a of the prism structure 22b of present embodiment and embodiment two is the site, the site of present embodiment is a concave point, and promptly prism structure 22b is a concave point.As for the generation type of light pipe 20b, the generation type with the light pipe 20a of embodiment two is identical haply, does not repeat them here.In addition, as for distribution situation and the generation type of prism structure 22b, distribution situation and the generation type with the prism structure 22a of embodiment two is identical haply, does not repeat them here.In addition, above-mentioned is that the prism structure 22b of site can be circle or polygon, is that example explains with the circle at this.And the light pipe 20b of present embodiment can be made by optical grade acryl or polycarbonate pc.Moreover light pipe 20b can be solid construction or hollow structure, and prism structure 22b and cylinder 21 can be integrated structures.
Embodiment four
Please be simultaneously with reference to Fig. 4 A～4B, Fig. 4 A illustrates the stereographic map according to the light pipe of embodiments of the invention four, and it is to cut open the plane and the sectional view of the light pipe looked toward light pipe by+x direction that Fig. 4 B illustrates yz plane with Fig. 4 A.Different being in prism structure 22c of light pipe 20c of the light pipe 20c of present embodiment and the light pipe 20a of embodiment two and embodiment three continues to continue to use label as for other identical constitutive requirements, and repeats no more.
Shown in 4A～4B figure, the prism structure 22c of present embodiment can be the screw thread prism, and this screw thread prism comprises recessed screw thread prism.In addition, the screw thread of each screw thread prism is continuous or discontinuous, is that example explains at this with continuous screw thread prism.Suppose the light source position outside the end of light pipe 20a, light pipe 22c is in order to the light receiving this light source in the one termination and send and carry out the light interference effect.Though at this screw thread prism with homogeneous pitch is that example explains, for the distribution situation of prism structure 22c on peripheral sides 21a of screw thread prism is not confined to this.For example, with the y direction, for the prism structure 22c of screw thread prism in that the pitch near this light source place can be more little more, and the calibration of screw thread prism is thinner.Therefore, make incident ray can arrive effective range of application of light pipe 20c equably.And in that the size away from the pitch at this light source place can be big more more, and the distribution of screw thread prism is closeer.Therefore, make that the scattering area of incident ray is bigger, to strengthen the refraction effect of light pipe 20c for incident ray.In the present embodiment, though for the prism structure 22c of screw thread prism in the continuous structure that is distributed as of x direction, for the prism structure 22c of screw thread prism can suitably be adjusted to discontinuous structure according to practical application in the distribution of x direction.Therefore, can reach the control of the light intensity of special angle.
In addition, the light pipe 20c of present embodiment can be made by optical grade acryl or polycarbonate pc.In addition, light pipe 20c can be solid construction or hollow structure, and prism structure 22c and cylinder 21 can be integrated structures.As for the generation type of light pipe 20c, the generation type with the light pipe 20a of embodiment two is identical haply, does not repeat them here.
Embodiment five
Please refer to Fig. 5, it illustrates the stereographic map according to the light pipe of embodiments of the invention five.What the light pipe 20d of present embodiment was different with the light pipe 20c of embodiment four is in prism structure 22d, continues to continue to use label as for other identical constitutive requirements, and repeats no more.
As shown in Figure 5, though the prism structure 22c of the prism structure 22d of present embodiment and embodiment four is the screw thread prism, the screw thread prism of present embodiment is the convex thread prism, and promptly prism structure 22d is the convex thread prism.As for the generation type of light pipe 20d, the generation type with the light pipe 20c of embodiment four is identical haply, does not repeat them here.In addition, as for distribution situation and the generation type of prism structure 22d, distribution situation and the generation type with the prism structure 22c of embodiment four is identical haply, does not repeat them here.In addition, each can be continuous or discontinuous structure for the prism structure 22d of screw thread prism, and the light pipe 20d of present embodiment can be made by optical grade acryl or polycarbonate pc.Moreover light pipe 20d can be solid construction or hollow structure, and prism structure 22d and cylinder 21 can be integrated structures.
Embodiment six
Please refer to 6 figure, it illustrates the sectional view according to the light pipe of embodiments of the invention six.Reflecting surface 21b is enclosed in being in that the light pipe 20e of present embodiment is different with the light pipe 20a of embodiment two in prism structure 22e is adjacent to, continue to continue to use label as for other identical constitutive requirements, and repeat no more.
Shown in 6 figure, the prism structure 22e of present embodiment comprises the site, and this site is concave point, and promptly prism structure 22e is the concave point that encloses reflecting surface 21b in being adjacent to.Generation type as for light pipe 20b is simply described as follows at this.Extrude the plates that are shaped earlier, this plates surface has prism structure 22e, towards the mode in the external world plates bending is not formed light pipe 20e with prism structure 22e again.Or, first injection molding one reflective structure, its peripheral sides has prism structure 22e.Again this reflective structure is inserted in the mould, going into the secondary injection molding of formula as Pliers, and obtain light pipe 20e.In addition, as for the distribution situation of prism structure 22e, the distribution situation with the prism structure 22a of embodiment two is identical haply, does not repeat them here.In addition, above-mentioned is that the prism structure 22e of site can be circle or polygon, is that example explains with the circle at this.The light pipe 20e of present embodiment can be made by optical grade acryl or polycarbonate pc.Moreover light pipe 20e can be solid construction or hollow structure.
Embodiment seven
Please refer to Fig. 7, it illustrates the sectional view according to the light pipe of embodiments of the invention seven.What the light pipe 20f of present embodiment was different with the light pipe 20e of embodiment six is in prism structure 22f, continues to continue to use label as for other identical constitutive requirements, and repeats no more.
As shown in Figure 7, though the prism structure 22e of the prism structure 22f of present embodiment and embodiment six is the site, the site of present embodiment is a concave point, and promptly prism structure 22f is a concave point.As for the generation type of light pipe 20f, the generation type with the light pipe 20e of embodiment six is identical haply, does not repeat them here.In addition, as for the distribution situation of prism structure 22f, the distribution situation with the prism structure 22b of embodiment three is identical haply, does not repeat them here.In addition, above-mentioned is that the prism structure 22f of site can be circle or polygon, is that example explains with the circle at this.Moreover the light pipe 20f of present embodiment can be made by optical grade acryl or polycarbonate pc, and light pipe 20f can be solid construction or hollow structure.
Embodiment eight
Please refer to Fig. 8, it illustrates the sectional view according to the light pipe of embodiments of the invention eight.Reflecting surface 21b is enclosed in being in that the light pipe 20g of present embodiment is different with the light pipe 20c of embodiment four in prism structure 22g is adjacent to, continue to continue to use label as for other identical constitutive requirements, and repeat no more.
As shown in Figure 8, the prism structure 22g of present embodiment comprises the screw thread prism, and this screw thread prism is recessed screw thread prism, and promptly prism structure 22g is the recessed screw thread prism that encloses reflecting surface 21b in being adjacent to.As for the generation type of light pipe 20g, the generation type with the light pipe 20e of embodiment six is identical haply, does not repeat them here.In addition, as for the distribution situation of prism structure 22g, the distribution situation with the prism structure 22c of embodiment four is identical haply, does not repeat them here.In addition, the light pipe 20g of present embodiment can be made by optical grade acryl or polycarbonate pc.Moreover light pipe 20g can be solid construction or hollow structure.
According to present embodiment and the rest may be inferred, for the prism structure of recessed screw thread prism also can be adjacent to cylinder 21 in enclose reflecting surface 21b, to form the light pipe of different kenels.The generation type of this light pipe, the generation type with the light pipe 20e of embodiment six is identical haply, does not repeat them here.This light pipe can be made by optical grade acryl or polycarbonate pc, and this light pipe can be solid construction or hollow structure.As for enclosing reflecting surface 21b in being adjacent to and being the distribution situation of the prism structure of recessed screw thread prism, the distribution situation with the prism structure 22d of embodiment five is identical haply, does not repeat them here.
The light source module that arbitrary light pipe of package structure for LED of the foregoing description one and embodiment two～eight is arranged in pairs or groups and formed can be applied on the lighting devices such as module backlight of daylight lamp group, indoor special lighting combination, outdoor advertising billboard, electric torch combination or liquid crystal indicator.
Embodiment nine
Please be simultaneously with reference to Fig. 9 A～9E, Fig. 9 A illustrates the synoptic diagram according to the module backlight of embodiments of the invention nine, and Fig. 9 B illustrates the combination stereogram of framework, package structure for LED and the light pipe of Fig. 9 A.The side view of the state when Fig. 9 C illustrates the package structure for LED of Fig. 9 B and light pipe and makes up on framework, the enlarged diagram of the subregion when Fig. 9 D illustrates the package structure for LED of Fig. 9 C and light pipe and makes up on framework, Fig. 9 E illustrates the synoptic diagram of the framework of Fig. 9 B.
Shown in Fig. 9 A～9E, module 90 backlight comprises a framework 91, at least one light pipe and at least one package structure for LED, is that example explains at this module backlight 90 with the down straight aphototropism mode set.The package structure for LED of module 90 backlight is that example explains with the package structure for LED 10 of embodiment one, package structure for LED 10 can send one-sided to light or bilateral to light.The light pipe of module 90 backlight can be light pipe a kind of light pipe wherein of the foregoing description two～eight, is that example explains at this with 6 light pipe 20a.Each light pipe 20a is that example explains with 5 package structure for LED 10 of arranging in pairs or groups, but the technology of present embodiment is not confined to this.Because the structure of package structure for LED 10 and light pipe 20a respectively at disclosing among the embodiment one～two and explanation, does not repeat them here.
Framework 91 has a base plate 91a and side plate 91b, and base plate 91a and side plate 91b define a recessed accommodation space 91c.The cylinder 21 of light pipe 20a is arranged among the accommodation space 91c, and is positioned on the base plate 91a, and the base 11 of package structure for LED 10 is arranged on the base plate 91a.Shown in Fig. 9 C～9D, the body 12 of package structure for LED 10 along the direction of arrow run through light pipe 20a peripheral sides and in enclose reflecting surface after, and be inserted in the cylinder 21.Therefore, make 3 package structure for LED 10 being arranged in the centre position first edge ring around groove and second edge ring around groove corresponding to peripheral sides 21a and in enclose zone between the reflecting surface 21b, and be arranged in the outermost position 2 package structure for LED 10 first edge ring around groove or second edge ring around groove corresponding to peripheral sides 21a and in enclose zone between the reflecting surface 21b.In each light pipe 20a, be arranged in 3 package structure for LED 10 in centre position, will be with direction towards two ends of light pipe 20a, penetrate bilateral to light to light pipe 20a.2 package structure for LED 10 that are arranged in the outermost position are at least in the mode towards light pipe 20a, penetrate one-sided to light to light pipe 20a.
In the present embodiment, package structure for LED 10 is connected with base plate 91a after can running through base plate 91a, as package structure for LED 10 run through behind the base plate 91a with base plate 91a snapping, gluing, be spirally connected, pin joint, welding, clamping, riveted joint or socket.Wherein, the screw hole of base plate 91a can be blind hole but not be through hole, so can reduce dust to enter among the accommodation space 91c, and reduce the generation probability of light leakage phenomena.Shown in Fig. 9 E, base plate 91a has several through holes 91e, and each through hole 91e uses the package structure for LED 10 for part to run through base plate 91a.Therefore, make package structure for LED 10 in module 90 backlight, directly to substitute, quite convenient.In addition, module 90 backlight also comprises a reflector plate 97 or a reflection horizon, and reflector plate 97 is arranged on base plate 91a and the side plate 91b, in order to reflection ray.The reflection horizon is coated on base plate 91a and the side plate 91b, also can be in order to reflection ray.Wherein, package structure for LED 10 runs through behind reflector plate 97 or the reflection horizon and is convexly set on reflector plate 97 or the reflection horizon.Moreover framework 91 is tool one top board 91d also, and top board 91d is connected with base plate 91a by side plate 91b.Module 90 backlight also comprises a diffuser plate 98, and diffuser plate 98 is arranged on the top board 91d, and seals the opening of accommodation space 91c, in order to diffusion light.Module 90 backlight also comprises an optical diaphragm group 99, and optical diaphragm group 99 is arranged on the diffuser plate 98, and comprises optical thin films such as diffusion sheet, prismatic lens or bright enhancement film, is treated to plane light in order to the light that will be received.Above-mentioned base plate 91a, side plate 91b and top board 91d can be integrated structures, and can comprise metal or Heat Conduction Material.
The module backlight 90 of present embodiment is used the arrange in pairs or groups light source module of composition of package structure for LED 10 and light pipe 20a because of it, can shorten the light mixing distance between package structure for LED 10 and the diffuser plate 98.Thus, can reduce the thickness of module 90 backlight greatly, and improve the practicality of module 90 backlight.
Embodiment ten
Please be simultaneously with reference to Figure 10 A～10D, Figure 10 A illustrates the synoptic diagram according to the module backlight of embodiments of the invention ten.Figure 10 B～10C illustrates two decomposing schematic representations of package structure for LED, framework and the light pipe of Figure 10 A, and Figure 10 D illustrates the stereographic map of the framework of Figure 10 A.Shown in Figure 10 A～10D, module 100 backlight comprises a framework 101, at least one light pipe and at least one package structure for LED, is that example explains at this module 100 backlight with side formula module backlight.The package structure for LED of module 100 backlight is that example explains with the package structure for LED 10 of embodiment one, package structure for LED 10 can send one-sided to light or bilateral to light.The light pipe of module 100 backlight can be light pipe a kind of light pipe wherein of the foregoing description two～eight, is that example explains at this with 2 light pipe 20a.These two light pipe 20a can send bilateral, and can to send one-sided package structure for LED 10 to light to the package structure for LED 10 of light and 2 be that example explains to arrange in pairs or groups 1, but the technology of present embodiment is not confined to this.Because the structure of package structure for LED 10 and light pipe 20a respectively at disclosing among the embodiment one～two and explanation, does not repeat them here.
Framework 101 has a base plate 101a and side plate 101b, and base plate 101a and side plate 101b define a recessed accommodation space 101c.The cylinder 21 of two light pipe 20a is arranged among the accommodation space 101c in the mode of being connected in series, and is positioned on the base plate 101a, and the base 11 of package structure for LED 10 is arranged on the base plate 101a.Shown in Figure 10 B～10C, the body 12 of package structure for LED 10 run through light pipe 20a peripheral sides 21a and in enclose reflecting surface 21b after, and be inserted in the cylinder 21.Therefore, make 1 package structure for LED 10 being arranged in the centre position first edge ring around groove and second edge ring around groove correspond respectively to 2 light pipe 20a peripheral sides 21a and in enclose zone between the reflecting surface 21b, and be arranged in the outermost position 2 package structure for LED 10 first edge ring around groove or second edge ring around groove correspond respectively to 2 light pipe 20a peripheral sides 21a and in enclose zone between the reflecting surface 21b.Be arranged in 1 package structure for LED 10 in centre position, will penetrate bilateral in light to 2 a light pipe 20a with direction towards relative two ends of 2 light pipe 20a.2 package structure for LED 10 that are arranged in the outermost position penetrate one-sided in light to 2 a light pipe 20a respectively in the mode towards 2 light pipe 20a.
In the present embodiment, package structure for LED 10 is connected with base plate 101a after can running through base plate 101a, as package structure for LED 10 run through behind the base plate 101a with base plate 101a snapping, gluing, be spirally connected, pin joint, welding, clamping, riveted joint or socket.Wherein, the screw hole of base plate 101a can be blind hole but not be through hole, so can reduce dust to enter among the accommodation space 101c, and reduce the generation probability of light leakage phenomena.Shown in Figure 10 C～10D, base plate 101a has several through holes 101e, and each through hole 101e uses the package structure for LED 10 for part to run through base plate 101a.Therefore, make package structure for LED 10 in module 100 backlight, directly to substitute, quite convenient.In addition, module 100 backlight also comprises a light guide plate 106 and a reflector plate 107, and light guide plate 106 has a first surface 106a, a second surface 106b and one the 3rd surperficial 106c.Second surface 106b connects first surface 106a and the 3rd surperficial 106c, and corresponding to the opening setting of accommodation space 101c.Reflector plate 107 is arranged on the 3rd surperficial 106c, in order to reflection ray, the light that enters light guide plate 106 via second surface 106b is penetrated to extraneous from first surface 106a.Wherein, have site 106d on the 3rd surperficial 106c, more little as salient point from the site that second surface 106b is near more, and network point distribution is closeer.In addition, big more from the site that second surface 106b is far away more, and network point distribution is loose.Module 100 backlight also comprises a diffuser plate 108, and diffuser plate 108 is arranged on the first surface 106a, in order to diffusion light.Module 100 backlight also comprises an optical diaphragm group 109, and optical diaphragm group 109 is arranged on the diffuser plate 108, and comprises optical thin films such as diffusion sheet, prismatic lens or bright enhancement film, is treated to plane light in order to the light that will be received.
Please refer to Figure 11, it illustrates the synoptic diagram according to the liquid crystal indicator of embodiments of the invention 11.In 11 figure, liquid crystal indicator 110 comprises one first Polarizer 111, a display panels 112, one second Polarizer 113 and a module backlight.Wherein, the module backlight of liquid crystal indicator 100 can be the module backlight 90 of embodiment nine or the module backlight 100 of embodiment ten, is that example explains at this with module 90 backlight.First Polarizer 111 is arranged on the module 90 backlight, and display panels 112 is arranged on first Polarizer 111, and second Polarizer 113 is arranged on the display panels 112.Wherein, the light penetrating shaft of first Polarizer 111 and second Polarizer 113 is vertical in fact mutually.
Its module backlight and liquid crystal indicator of disclosed package structure for LED of the above embodiment of the present invention and light pipe and application, but the package structure for LED of its lateral direction light emission sees through the effect of light pipe for light, can be as the fluorescent tube scattered beam.As seen, the light source module that the package structure for LED of present embodiment and light pipe are arranged in pairs or groups and formed is broken away from the yoke of the design of traditional light source widely.In addition, the module backlight of present embodiment is used package structure for LED and light pipe and is arranged in pairs or groups behind the light source module of composition, can shorten the light mixing distance between package structure for LED and the diffuser plate.Thus, can reduce the thickness of module backlight greatly, and then improve the practicality of module backlight and liquid crystal indicator.In addition, package structure for LED can directly be substituted on module backlight via the through hole of framework, seems quite convenient.Moreover present embodiment uses light-emitting diode chip for backlight unit with as light source, can exempt the resource that faces as fluorescent tube and reclaim difficulty and mercury pollution problem of environment, quite meets the environmental protection demand.
In sum; though the present invention discloses as above with preferred embodiment; but these embodiment are not in order to limit the present invention; any those skilled in the art; without departing from the spirit and scope of the present invention; can make the replacement and the modification of all equivalences, thus protection scope of the present invention with appending claims the person of being defined be as the criterion.
Claims (47)
1. a package structure for LED is characterized in that, comprising:
One base;
One body is arranged on the described base, and has one first side, and described first side has one first edge ring around groove; And
A plurality of first light-emitting diode chip for backlight unit are arranged at described first edge ring on the bottom land of groove, in order to the side direction light of described package structure for LED to be provided.
2. package structure for LED as claimed in claim 1 is characterized in that, described body is a right cylinder or a polygon cylinder.
3. package structure for LED as claimed in claim 1 is characterized in that described first light-emitting diode chip for backlight unit comprises the matched combined of white led chip or redness, green and blue led chips.
4. package structure for LED as claimed in claim 1 is characterized in that described body comprises Heat Conduction Material, reflecting material or stupalith.
5. package structure for LED as claimed in claim 1 is characterized in that, also comprises:
One reflecting material is arranged at described first edge ring on the cell wall of groove.
6. package structure for LED as claimed in claim 1 is characterized in that, also comprises:
Phosphor powder is coated on described first light-emitting diode chip for backlight unit; And
Colloid is filled in described first edge ring in groove, and covers described first light-emitting diode chip for backlight unit and described phosphor powder.
7. package structure for LED as claimed in claim 6 is characterized in that, described first light-emitting diode chip for backlight unit comprises blue led chips, and described phosphor powder comprises yellow phosphor powder.
8. package structure for LED as claimed in claim 6 is characterized in that described colloid comprises epoxy resin, polymethylmethacrylate or white colloid.
9. package structure for LED as claimed in claim 1 is characterized in that described base comprises radiator structure.
10. package structure for LED as claimed in claim 1, it is characterized in that, described body also has one second side with respect to described first side, described second side has one second edge circle zone corresponding to the described first edge circle zone, and described package structure for LED also comprises:
A plurality of second light-emitting diode chip for backlight unit are arranged in the described second edge circle zone, in order to the side direction light of described package structure for LED to be provided.
11. a module backlight is characterized in that, comprising:
One framework has a base plate and side plate, and described base plate and described side plate define an accommodation space;
Light pipe comprises:
One cylinder is arranged in the described accommodation space, and is positioned on the described base plate, and described cylinder has in a peripheral sides and one and encloses reflecting surface, encloses reflecting surface in order to reflection ray in described; And
A plurality of prism structures, be arranged at described peripheral sides and described in enclose between the reflecting surface, enclose reflecting surface in order to reflection ray in described, in order to the light of interfering described light pipe to receive; And
Package structure for LED comprises:
One base is arranged on the described base plate;
One body, be arranged on the described base, and run through described peripheral sides and described in be inserted in the described cylinder after enclosing reflecting surface, described body has one first relative side and one second side, described first side and described second side have respectively one first edge ring around groove and one second edge ring around groove, described first edge ring is relative around groove with described second edge ring around groove;
A plurality of first light-emitting diode chip for backlight unit are arranged at described first edge ring on the bottom land of groove, in order to emitting side to light to the end of described light pipe; And
A plurality of second light-emitting diode chip for backlight unit are arranged at described second edge ring on the bottom land of groove, in order to emitting side to light to the other end of described light pipe.
12. module backlight as claimed in claim 11 is characterized in that, described package structure for LED also comprises:
One reflecting material is arranged at described first edge ring on the cell wall of groove.
13. module backlight as claimed in claim 11 is characterized in that, described package structure for LED also comprises:
Phosphor powder is coated on described first light-emitting diode chip for backlight unit; And
Colloid is filled in described first edge ring in groove, and covers described first light-emitting diode chip for backlight unit and described phosphor powder.
14. module backlight as claimed in claim 11 is characterized in that described cylinder also has a perforation, described light pipe also comprises:
One reflecting material is arranged on the inwall of described perforation, encloses reflecting surface to form in described cylinder in described.
15. module backlight as claimed in claim 11 is characterized in that described cylinder also has a perforation, described light pipe also comprises:
One reflection tube inserts in the described perforation, encloses reflecting surface to form in described cylinder in described.
16. module backlight as claimed in claim 11 is characterized in that, described prism structure is arranged on the described peripheral sides or is adjacent to and encloses reflecting surface in described.
17. module backlight as claimed in claim 16 is characterized in that described prism structure comprises a plurality of sites.
18. module backlight as claimed in claim 17 is characterized in that, described site is salient point or concave point.
19. module backlight as claimed in claim 16 is characterized in that, described prism structure comprises a plurality of screw thread prisms.
20. module backlight as claimed in claim 19 is characterized in that, described screw thread prism comprises recessed screw thread prism or convex thread prism.
21. module backlight as claimed in claim 19 is characterized in that, the screw thread of each screw thread prism is continuous or discontinuous.
22. module backlight as claimed in claim 11 is characterized in that, described package structure for LED is connected with described base plate after running through described base plate.
23. module backlight as claimed in claim 11 is characterized in that, also comprises:
One reflector plate is arranged on described base plate and the described side plate, and in order to reflection ray, described package structure for LED runs through behind the described reflector plate and is convexly set on the described reflector plate.
24. module backlight as claimed in claim 11 is characterized in that described framework also has a top board, described top board is connected with described base plate by described side plate, and described module backlight also comprises:
One diffuser plate is arranged on the described top board, and seals the opening of described accommodation space, in order to diffusion light.
25. module backlight as claimed in claim 24 is characterized in that, also comprises:
One optical diaphragm group is arranged on the described diffuser plate.
26. module backlight as claimed in claim 11 is characterized in that, also comprises:
One light guide plate has a first surface, a second surface and one the 3rd surface, and described second surface connects described first surface and described the 3rd surface, and corresponding to the opening setting of described accommodation space; And
One reflector plate is arranged on described the 3rd surface, in order to reflection ray, the light that enters described light guide plate via described second surface is penetrated to extraneous from described first surface.
27. module backlight as claimed in claim 11 is characterized in that, also comprises:
One diffuser plate is arranged on the described first surface, in order to diffusion light.
28. module backlight as claimed in claim 27 is characterized in that, also comprises:
One optical diaphragm group is arranged on the described diffuser plate.
29. a liquid crystal indicator is characterized in that, comprising:
One module backlight comprises:
One framework has a base plate and side plate, and described base plate and described side plate define an accommodation space;
Light pipe comprises:
One cylinder is arranged in the described accommodation space, and is positioned on the described base plate, and described cylinder has in a peripheral sides and one and encloses reflecting surface, encloses reflecting surface in order to reflection ray in described; And
A plurality of prism structures, be arranged at described peripheral sides and described in enclose between the reflecting surface, enclose reflecting surface in order to reflection ray in described, in order to the light of interfering described light pipe to receive; And
Package structure for LED comprises:
One base is arranged on the described base plate;
One body, be arranged on the described base, and run through described peripheral sides and described in be inserted in the described cylinder after enclosing reflecting surface, described body has one first relative side and one second side, described first side and described second side have respectively one first edge ring around groove and one second edge ring around groove, described first edge ring is relative around groove with described second edge ring around groove;
A plurality of first light-emitting diode chip for backlight unit are arranged at described first edge ring on the bottom land of groove, in order to emitting side to light to the end of described light pipe; And
A plurality of second light-emitting diode chip for backlight unit are arranged at described second edge ring on the bottom land of groove, in order to emitting side to light to the described light pipe other end;
One first Polarizer is arranged on the described module backlight;
One display panels is arranged on described first Polarizer; And
One second Polarizer is arranged on the described display panels.
30. liquid crystal indicator as claimed in claim 29 is characterized in that, described package structure for LED also comprises:
One reflecting material is arranged at described first edge ring on the cell wall of groove.
31. liquid crystal indicator as claimed in claim 29 is characterized in that, described package structure for LED also comprises:
Phosphor powder is coated on described first light-emitting diode chip for backlight unit; And
Colloid is filled in described first edge ring in groove, and covers described first light-emitting diode chip for backlight unit and described phosphor powder.
32. liquid crystal indicator as claimed in claim 29 is characterized in that, described cylinder also has a perforation, and described light pipe also comprises:
One reflecting material is arranged on the inwall of described perforation, encloses reflecting surface to form in described cylinder in described.
33. liquid crystal indicator as claimed in claim 29 is characterized in that, described cylinder also has a perforation, and described light pipe also comprises:
One reflection tube inserts in the described perforation, encloses reflecting surface to form in described cylinder in described.
34. liquid crystal indicator as claimed in claim 29 is characterized in that, described prism structure is arranged on the described peripheral sides or is adjacent to and encloses reflecting surface in described.
35. liquid crystal indicator as claimed in claim 34 is characterized in that, described prism structure comprises a plurality of sites.
36. liquid crystal indicator as claimed in claim 35 is characterized in that, described site is salient point or concave point.
37. liquid crystal indicator as claimed in claim 34 is characterized in that, described prism structure comprises a plurality of screw thread prisms.
38. liquid crystal indicator as claimed in claim 37 is characterized in that, described screw thread prism comprises recessed screw thread prism or convex thread prism.
39. liquid crystal indicator as claimed in claim 37 is characterized in that, the screw thread of each screw thread prism is continuous or discontinuous.
40. liquid crystal indicator as claimed in claim 29 is characterized in that, described package structure for LED is connected with described base plate after running through described base plate.
41. liquid crystal indicator as claimed in claim 29 is characterized in that, described module backlight also comprises:
One reflector plate is arranged on described base plate and the described side plate, and in order to reflection ray, described package structure for LED runs through behind the described reflector plate and is convexly set on the described reflector plate.
42. liquid crystal indicator as claimed in claim 29 is characterized in that, described framework is tool one top board also, and described top board is connected with described base plate by described side plate, and described module backlight also comprises:
One diffuser plate is arranged on the described top board, and seals the opening of described accommodation space, in order to diffusion light.
43. liquid crystal indicator as claimed in claim 42 is characterized in that, described module backlight also comprises:
One optical diaphragm group is arranged on the described diffuser plate.
44. liquid crystal indicator as claimed in claim 29 is characterized in that, described module backlight also comprises:
One light guide plate has a first surface, a second surface and one the 3rd surface, and described second surface connects described first surface and described the 3rd surface, and corresponding to the opening setting of described accommodation space; And
One reflector plate is arranged on described the 3rd surface, in order to reflection ray, the light that enters described light guide plate via described second surface is penetrated to extraneous from described first surface.
45. liquid crystal indicator as claimed in claim 29 is characterized in that, described module backlight also comprises:
One diffuser plate is arranged on the described first surface, in order to diffusion light.
46. liquid crystal indicator as claimed in claim 45 is characterized in that, described module backlight also comprises:
One optical diaphragm group is arranged on the described diffuser plate.
47. liquid crystal indicator as claimed in claim 29 is characterized in that, the light penetrating shaft of described first Polarizer and described second Polarizer is vertical mutually.
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| CN2006100819973A CN101075605B (en) | 2006-05-15 | 2006-05-15 | Structure for packing light-emitting diodes, backlight module and liquid crystal display device thereof |
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