CN105627250A - Optical assembly and illuminating device with same - Google Patents
Optical assembly and illuminating device with same Download PDFInfo
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- CN105627250A CN105627250A CN201410620057.1A CN201410620057A CN105627250A CN 105627250 A CN105627250 A CN 105627250A CN 201410620057 A CN201410620057 A CN 201410620057A CN 105627250 A CN105627250 A CN 105627250A
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Abstract
The invention discloses an optical assembly and an illuminating device. The optical assembly comprises a body, a light entering surface and a light exiting surface. Concave space is formed in the bottom of the body. The light entering surface is defined by the concave space of the body, so that light can enter the light entering surface, moreover, the light entering surface is provided with an annular region, a plurality of micro-structures are arranged on the annular region of the light entering surface at least, and each micro-structure is provided with a cambered surface. The light exiting surface is formed on the outer surface of the body, and the bottom edge of the outer surface is adjacently connected to the outer edge of the bottom of the body. The illuminating device comprises the optical assembly and a light source. By the optical assembly and the illuminating device, yellow ring circumstances can be reduced, the utilization rate of light is improved, and the problem of central bright spots is solved.
Description
[technical field]
The present invention relates to a kind of optical module and there is the illuminator of described optical module, particularly relating to light-entering surface and be provided with the optical module of micro structure and there is the illuminator of described optical module.
[background technology]
Along with light emitting diode (light-emitteddiode, LED) backlight module of TV constantly towards large scale, lightweight, thickness is thin and the various demands of high-performance etc., how promoting these design requirements further has become the new trend of LED television backlight module development in recent years. At present, when the light emitting diode that LED backlight module uses contains fluorescent material and because LED is very close to diffuser plate, easily produce uneven imaging in diffuser plate at light by backlight lens and produce yellow to enclose phenomenon, affecting the display quality of TV.
As shown in Figure 1, in the backlight lens 100 of known techniques, for solving above-mentioned problem, lightening hole 102 is to change reflection and the refraction of LED106 light by single curved surface 104, the lightening hole 102 of usual lower semisection 103 is for going straight up to (skyrocketing) shape (namely slope is bigger), partially yellow light 105 is made to get out toward the both sides of backlight lens 100 to the direction outside target projected area, with the problem reducing yellow circle; Although aforesaid way can solve the effect of the yellow circle of a part, but the waste of a part of light during partially yellow light 105 projected outward, will be caused. Furthermore, backlight module mostly arranges multiple LED, simultaneously need to multiple backlight lens 100 of arranging in pairs or groups, therefore, these are directly got out the hot spot that partially yellow light 105 is likely to affect the target projected area of other backlight lens, consequently, it is possible to cause the colourity of its hot spot uneven. In addition, the lightening hole 102 of lower semisection 103 is the state of going straight up to, after the light of a part gets to the sidewall reflection of lightening hole 102, it is directly toward the top 110 of lightening hole 102 through going and causing the hot spot of imaging to have central bright spot, additionally the center of light output surface must be made concave surface 108 to avoid central bright spot, it is necessary to higher cost and more complicated fabrication steps.
It is thus desirable to develop a kind of new-type optical module and illuminator to solve the problems referred to above.
[summary of the invention]
One of present invention purpose is in that provide a kind of optical module and have the illuminator of this optical module, by being at least provided with several micro structures with cambered surface in the annular of light-entering surface, to reduce yellow circle phenomenon, promote light utilization and solve the problem that optical module causes central bright spot.
For reaching above-mentioned purpose, preferable embodiment provides a kind of optical module, including: body, a matrix space is formed on the bottom of described body; Light-entering surface, defined by the described matrix space of described body, for a light, and described light-entering surface has an annular region, wherein said light-entering surface is at least provided with several micro structures in described annular region, and each some micro structures have a cambered surface; And light output surface, it being formed at the outer surface of described body, the root edge of wherein said outer surface adjoins the outer rim of the bottom of described body.
In one embodiment, each some micro structures towards described matrix space depression by described body or are protruded and are formed.
In one embodiment, the described cambered surface of each some micro structures is defined by each some micro structures interface between described body and described matrix space, and the cambered surface altimeter in arbitrary some micro structures at described interface place is shown as H, cambered surface width means in arbitrary some micro structures at described interface place is W, wherein 0.01 mm H 0.2 millimeter, and 0.01 millimeter of W 0.8 millimeter.
In one embodiment, the described cambered surface of each some micro structures is defined by each some micro structures interface between described body and described matrix space, and it is expressed as R at the cambered surface height H of arbitrary some micro structures of described interface divided by the ratio of the cambered surface width W of described arbitrary some micro structures, wherein 0.003 R 1.2.
In one embodiment, some micro structures are several concentric circles from described matrix Space View.
In one embodiment, some micro structures are corrugated.
In one embodiment, some micro structures are regularly arranged or irregular alignment on described light-entering surface.
In one embodiment, described matrix space has an opening, with the plane definition by described opening peristoma for datum level, has identical geometry relative to the described datum level position arbitrary some micro structures in sustained height position.
In one embodiment, described matrix space has an opening, it is defined as datum mark with the geometric center of described opening peristoma, with the plane definition by described opening peristoma for datum level, it is defined as reference axis with the straight line by described datum mark vertical described datum level, with by a plane definition of described reference axis for cross section, described cross section divides described light-entering surface with described reference axis and forms a first area and a second area, described first area has some cavity disperse characteristic parts and forms a cavity disperse characteristic section, the one end being closer to described reference axis in the two ends of described cavity disperse characteristic section is defined as described first end points, the line of described first end points and described datum mark and described datum level form the distribution angle �� of some micro structures, wherein, 20 degree of �� 90 degree.
In one embodiment, 20 degree of �� 60 degree.
In one embodiment, being defined as one second end points further away from one end of described reference axis in the two ends of described cavity disperse characteristic section, described second end points is H along the distance definition of the direction extremely described datum level of described reference axisL, wherein 0 mm HL5 millimeters.
In one embodiment, described matrix space has an opening, it is defined as datum mark with the geometric center of described opening peristoma, with the plane definition by described opening peristoma for datum level, it is defined as reference axis with the straight line by described datum mark vertical described datum level, with by a plane definition of described reference axis for cross section, described cross section divides described light-entering surface with described reference axis and forms a first area and a second area, described first area has some cavity disperse characteristic parts and forms a cavity disperse characteristic section, the line of described cavity disperse characteristic section head and end and described datum level form the tilt angle alpha of some micro structures, wherein 10 degree of �� 80 degree.
In one embodiment, 30 degree of �� 60 degree.
In one embodiment, described matrix space has an opening, it is defined as datum mark with the geometric center of described opening peristoma, with the plane definition by described opening peristoma for datum level, be defined as reference axis with the straight line by described datum mark vertical described datum level, described in go out surface, in described reference axis and described light output surface intersection, there is a par.
In one embodiment, described par is smooth surface.
In one embodiment, described light-entering surface has a concave regions of adjacent described annular region, and the junction of described annular region and described concave regions forms turnover, the more described concave regions of described annular region is close to the bottom of described body, and described concave regions is formed by described body recess.
In one embodiment, described concave regions forms one first opening in the described junction with described annular region, and described annular region forms one second opening further away from described concave regions place, described second opening of wherein said annular region is more than described first opening of described concave regions.
In one embodiment, described light-entering surface has a concave regions of adjacent described annular region, and described concave regions is smooth surface, the more described concave regions of described annular region is close to the bottom of described body, and described concave regions is formed by described body recess.
In one embodiment, described light-entering surface has a concave regions of adjacent described annular region, and described concave regions is atomization surface, the more described concave regions of described annular region is close to the bottom of described body, and described concave regions is formed by described body recess.
In one embodiment, described matrix space has an opening, and with the plane definition by described opening peristoma for datum level, the diameter of the opening peristoma in described matrix space is DI, the height of described light-entering surface is HI, wherein 0.2 HI/DI3, the height H of described light-entering surfaceIFor any point on described light-entering surface along the direction of vertical described datum level to the maximum of distance of described datum level.
In one embodiment, described matrix space has an opening, and with the plane definition by described opening peristoma for datum level, the diameter of the opening peristoma in described matrix space is DI, the height of described light-entering surface is HI, wherein 0.2 HI/DI3, the height H of described light-entering surfaceIFor any point on described light-entering surface along the direction of vertical described datum level to the maximum of distance of described datum level.
In one embodiment, wherein 0.2 HI/DI�Q0.8��
In one embodiment, the bottom of described body has a bottom surface, and described bottom surface stretches out from the root edge of described light-entering surface and is directly or indirectly connected with described light output surface, and the diameter of described bottom surface outer rim is DO, the height of described light output surface is HO, wherein 0.2 HO/DO0.8, the height H of described light output surfaceOFor any point on described light output surface along the direction of vertical described datum level to the maximum of distance of described datum level.
In one embodiment, described matrix space has an opening, with the plane by described opening peristoma for datum level, the described opening peristoma in described matrix space is non-circular, in described opening peristoma, the direction of the line of 2 of lie farthest away is for a first direction, and the maximum of described opening peristoma two lateral extent is first direction width D in said first direction1, with vertical described first direction for a second direction, the second direction width D that maximum is described opening peristoma of described opening peristoma two lateral extent in this second direction2, the height of described light-entering surface is HI, wherein 0.2 HI/D13,0.2 HI/D23, the height H of described light-entering surfaceIFor any point on described light-entering surface along the direction of vertical described datum level to the maximum of distance of described datum level.
In one embodiment, the described outer surface of described body comprises a reflecting surface, and the root edge of described reflecting surface is adjacent with the outer rim of the bottom of described body, and the apical margin of described reflecting surface is directly or indirectly connected with the outer rim of described light output surface.
In one embodiment, described light-entering surface has a concave regions of adjacent described annular region, a convex region or a flat site thrin, the more described concave regions of described annular region, described convex region or described flat site are close to the bottom of described body, and described concave regions is formed by described body recess.
In one embodiment, the material of described body is transparent material.
In one embodiment, this illuminator includes optical module and light emitting diode, and the light-emitting area of described light emitting diode is towards the described light-entering surface of described optical module. In one embodiment, described light emitting diode is polycrystalline light emitting diode.
In one embodiment, this illuminator includes optical module, light source and a diffuser plate, and described diffuser plate is located at the outside of the described light output surface of described optical module, injects for the light penetrated from described light output surface.
Based on above-mentioned, by the optical module of the present invention and have the design of illuminator of this optical module, following effect can be produced:
1. the light that light emitting diode sends can be broken up by the micro structure on light-entering surface, and again mixes, thus reducing yellow circle phenomenon.
2. the present invention is through micro structure and is broken up and mixed light by partially yellow light, and these partially yellow light still can project without wasting toward target projected area, therefore the present invention except can reduce yellow enclose phenomenon except, also can improve light utilization.
3., when the optical module of the present invention is applied in backlight module and arranges multiple, can avoid affecting these partially yellow light direct projected outward the hot spot of the target projected area of other optical module. These partially yellow direct projected outward of light are likely to affect the hot spot of the target projected area of other optical module, consequently, it is possible to cause the uneven problem of the colourity of its hot spot.
4. the light sent from light emitting diode both sides can be broken up by these micro structures and be less susceptible to directly toward the center of top traverse of light output surface, and the problem that central bright spot can be reduced.
[accompanying drawing explanation]
Above-mentioned purpose of the present invention, feature and advantage specifically will present with institute accompanying drawings in conjunction with described further below.
Fig. 1 is the sectional view of the backlight lens of known techniques.
Fig. 2 is the sectional view of the illuminator illustrating one embodiment of the invention.
Fig. 3 is the schematic perspective view illustrating the optical module in Fig. 2.
Fig. 4 is the fragmentary isometric views illustrating the optical module in Fig. 2.
Fig. 5 is the partial enlarged drawing illustrating Fig. 2.
Fig. 6 is the upward view illustrating the optical module in Fig. 2.
Fig. 7 A is the light path schematic diagram illustrating one embodiment of the invention.
Fig. 7 B is the partial enlarged drawing illustrating Fig. 7 A.
Fig. 8 is the sectional view of the optical module illustrating a present invention time embodiment.
Fig. 9 is the sectional view of the optical module illustrating further embodiment of this invention.
Figure 10 is the sectional view of the optical module illustrating another embodiment of the present invention.
Figure 11 is the design parameter schematic diagram illustrating the optical module in Figure 10.
Figure 12 is the distribution curve flux figure of the optical module in Figure 10.
Figure 13 is the illumination figure of the optical module in Figure 10.
Figure 14 is the sectional view of the optical module illustrating further embodiment of this invention.
Figure 15 is the matrix space openings peristoma schematic diagram illustrating the optical module in Figure 14.
Figure 16 is the sectional view of the optical module illustrating yet another embodiment of the invention.
Figure 17 is the sectional view of the optical module illustrating a present invention time embodiment.
Figure 18 is the sectional view of the optical module illustrating another embodiment of the present invention.
[detailed description of the invention]
Graphic below in conjunction with in the embodiment of the present invention, is clearly and completely described the technical scheme in the embodiment of the present invention, but described embodiment a part of embodiment that is only the present invention, rather than whole embodiments. Additionally, for the ease of illustrating or understanding the present invention, assembly similar or identical herein is use same or similar element numbers in different graphic or different embodiments.
Refer to shown in Fig. 2 to Fig. 4, wherein Fig. 2 is the sectional view of the illuminator 20 of one embodiment of the invention. Fig. 3 is the schematic perspective view illustrating the optical module 200a in Fig. 2. Fig. 4 is the sectional perspective side view illustrating the optical module 200a in Fig. 2. As shown in 2 to Fig. 4, in one embodiment, illuminator 20 includes optical module 200a and light source 302, wherein optical module 200a is commonly referred to as again lens, light source 302 is such as light emitting diode 302a, optical module 200a includes body 202, light-entering surface 204 and light output surface 206, the light-emitting area of light emitting diode 302a is towards the light-entering surface 204 of optical module 200a, and light emitting diode 302a sends in this embodiment light is partially white in central authorities, the then yellow partially of the light in the left and right sides. In one embodiment, the material of body 202 is transparent material. The material of body 202 is such as selected from polymethyl methacrylate (polymethylmethacrylate, PMMA), the group that Merlon (polycarbonate, PC), silica gel (silicone) and glass (glass) form. A matrix space 210 is formed, in one embodiment the similar shape hanging clock in this matrix space 210 from the bottom of body 202. Light-entering surface 204 is defined by the matrix space 210 of body 202. In other words, defining matrix space 210 from the bottom of body 202, the internal face in matrix space 210 defines light-entering surface 204. Light-entering surface 204 is available for light, and light-entering surface 204 has annular region 228, wherein light-entering surface 204 is at least provided with several micro structures 212 in annular region 228, and each micro structure 212 has a cambered surface 214, in one embodiment, cambered surface 214 is a part for circular arc. In other words, light-entering surface 204 except can being provided with several micro structures 212 in annular region 228, it is also possible to arranges micro structure in other region, for instance the light-entering surface 204 shown in Fig. 8. As in figure 2 it is shown, light output surface 206 is formed at the outer surface 216 of body 202, the outer rim of the bottom of the adjacent body 202 of the root edge of its outer surface 216. In this embodiment, outer surface 216 also comprises the step surface 217 connected with light output surface 206. Additionally, the light-entering surface 204 of optical module of the present invention still has other aspect with light output surface 206, in rear explanation.
Refer to shown in Fig. 2, Fig. 4 and Fig. 5, wherein Fig. 5 is the partial enlarged drawing illustrating Fig. 2. As it can be seen, in one embodiment, each micro structure 212 can be caved in towards matrix space 210 by body 202 or protrude and formed. In the embodiment shown in Figure 2, micro structure 212 is caved in towards matrix space 210 by body 202 and is formed. The cambered surface 214 of each micro structure 212 is defined by each micro structure 212 interface 213 between body 202 and matrix space 210, and the cambered surface altimeter in arbitrary micro structure 212 at interface 213 place is shown as H, cambered surface width means in arbitrary micro structure 212 at interface 213 place is W, H and W can be arbitrary size, is wherein preferably 0.01 mm H 0.2 millimeter. In a preferred embodiment, 0.01 millimeter of W 0.8 millimeter. In a further preferred embodiment, it is expressed as R at the cambered surface height H of arbitrary micro structure 212 of interface 213 divided by the ratio of the cambered surface width W of arbitrary micro structure 212, is wherein preferably 0.003 R 1.2.
Refer to shown in Fig. 2 and Fig. 6, wherein Fig. 6 is the upward view illustrating the optical module 200a in Fig. 2, and as shown in Figure 6, these micro structures 212 can be several concentric circles from matrix space 210 sight. Additionally, these micro structures 212 can be for example corrugated, corrugated can be for example the tetragon corrugated shown in Fig. 2, but is not limited to this, it is possible to for triangle corrugated, pentagon corrugated, hexagon corrugated or other polygon. It is regularly arranged that these micro structures 212 can be for example shown in Fig. 2 on light-entering surface 204, but is not limited to this, it is possible to being irregular alignment, regularly arranged being advantageous in that is easier to produce uniform hot spot. Micro structure 212 can be for example the concavees lens micro structure shown in Fig. 2, but may also be convex lens micro structure and formed. In addition as in figure 2 it is shown, in one embodiment, matrix space 210 has an opening 220, with by the plane definition of opening peristoma 222 for datum level B, relative to the datum level B position arbitrary micro structure 212 in sustained height position, there is identical geometry.
It is it should be noted that although known atomization surface also has micro structure, but different from the micro structure 212 of the present invention. The micro structure 212 of the present invention has a cambered surface 214, and this cambered surface 214 be can with the naked eye or the clear and definite identification of utensil such as magnifier out. In addition the micro structure 212 of the present invention is can to control geometry at the design initial stage, as shown in Figure 5, in this embodiment, this cambered surface 214 is a part for circular arc, and when design available mapping software accurately draw the distance between its radius of curvature, cambered surface height, width or adjacent microstructures 212 or several concentric circles, corrugated, etc. Boulez mode, and these geometries all can affect the effects such as refraction or the reflection of light, also available optical simulation software carries out emulating to grasp optical effect in addition. But the micro structure of atomization surface cannot with the naked eye or the utensil such as magnifier clearly picks out and has cambered surface, the micro structure of atomization surface is the surface of a kind of roughening, though available processing mode controls the degree of its roughening, but namely cannot determine the geometry of each micro structure accurately with mapping software at the design initial stage, therefore also more inconvenient in optical design. In addition, generally speaking, although smooth surface is because being not provided with, micro structure efficiency is high still cannot break up light (homogenization), relatively, light all can be broken up thus reaching effect of homogenization by the micro structure 212 of the light-entering surface 204 of the present invention and known atomization surface, but the micro structure 212 of the present invention more can use mapping software accurately control its geometry because having cambered surface 214, so mutually more conventional smooth surface and atomization surface are relatively easy to average out between the demand and the demand of light efficiency of homogenization, to meet design object.
Additionally, the micro structure of indication of the present invention is a kind of relative concept, that is the micro structure 212 of the present invention is small compared with body 202, specifically, as shown in Figure 2 and Figure 5, and the diameter D of the cambered surface width W of micro structure 212 and bottom surface 208 outer rim of body 202ORatio W/DOIt is between 0.0001 and 0.14.
With reference to shown in Fig. 2, Fig. 7 A and Fig. 7 B, wherein Fig. 7 A is the light path schematic diagram illustrating one embodiment of the invention, and Fig. 7 B is the partial enlarged drawing illustrating Fig. 7 A. in this embodiment, the light relative datum axle A that light-entering surface 204, light output surface 206 and light emitting diode 302a send is substantially symmetrical, thus Fig. 7 A and Fig. 7 B only illustrate reference axis A left field (that is first area R1) light path signal. as shown in figures 7 a and 7b, by light-entering surface 204 in annular region 228 at least provided with several micro structures 212, each micro structure 212 has a cambered surface 214, the light that light emitting diode 302a sends can be broken up by these micro structures 212, and again mix light, thereby can reach effect of equalizing light rays, specifically, these micro structures 212 can will be sent by both sides and partially yellow light Ly breaks up from light emitting diode 302a, then the inclined gold-tinted line Ly1 broken up, Ly2, Ly3 can respectively and from light emitting diode 302a near central authorities sent partially white light Lw1, Lw2, Lw3 is neutralized in the mixing of diffuser plate 304 place, thus reducing yellow circle phenomenon. the way of this minimizing Huang circle phenomenon is different from known, it is go straight up to shape and partially yellow light is directly projected toward the direction beyond target projected area and slatterns that known backlight lens are through the lower semisection of lightening hole, but the way of the present invention is through after partially yellow light Ly is broken up by micro structure 212 through mixed light, these partially yellow light Ly1, Ly2, Ly3 still can project without wasting toward target projected area, and therefore the present invention also can improve light utilization except can reducing yellow circle phenomenon. therefore, when the optical module 200a of the present invention is applied in backlight module and arranges multiple, can avoid affecting these partially yellow light direct projected outward the hot spot (these partially yellow direct projected outward of light are likely to affect the hot spot of target projected area of other optical module, thus causing the uneven problem of the colourity of its hot spot) of the target projected area of other optical module. additionally, the light sent from light emitting diode 302a both sides can be broken up by these micro structures 212 and be less susceptible to directly toward exiting surface center of top traverse, and the problem that central bright spot can be improved. relatively, the backlight lens of known techniques are the state of going straight up to because of its lightening hole lower half, so being easier to by luminous reflectance from exiting surface center of top traverse, and cause central bright spot.
As shown in Figure 2, in one embodiment, matrix space 210 has an opening 220, it is defined as datum mark O with the geometric center of opening peristoma 222, with by the plane definition of opening peristoma 222 for datum level B, be defined as reference axis A with the straight line by datum mark O vertical reference face B, with by a plane definition of reference axis A for section S, section S is subdivided into optical surface 204 with reference axis A and forms first area R1 and second area R2. As shown in Figure 2 and Figure 6, in this embodiment, the opening peristoma 222 of optical module 200a is circular, datum mark O is the center of circle, reference axis A is light-entering surface 204 and the axis of symmetry of light output surface 206, and these micro structures 212 are around reference axis A mono-and enclose and be distributed in the annular region 228 of light-entering surface 204, reference axis A runs through the center of light output surface 206 in addition. It addition, the bottom surface of light emitting diode 302a flushes with the bottom surface 208 of body 202.
As shown in Figure 2 and Figure 5, in one embodiment, first area R1 has these micro structures 212 be distributed part and form a cavity disperse characteristic section 224, the one end being closer to reference axis A in the two ends of cavity disperse characteristic section 224 is defined as the first end points P1, the line of the first end points P1 and datum mark O and datum level B form the distribution angle �� of these micro structures 212, in one embodiment, 20 degree of �� 90 degree. In a preferred embodiment, 20 degree of �� 60 degree, in the most preferred embodiment of Fig. 2, ��=42 degree. In the optical module 200a of the present invention, suitably adjust distribution angle �� and can effectively eliminate yellow circle phenomenon. As shown in the light path schematic diagram of Fig. 7 A and Fig. 7 B, due to light luminous in both sides for light emitting diode 302a, partially yellow central authorities are partially white, the light Ly that wherein two lateral deviations are yellow causes yellow circle phenomenon, these micro structures 212 of the present invention are primarily directed to the light Ly that these are partially yellow, broken up and played the effect of homogenization, but under certain conditions, if the words that the distribution angle �� of micro structure 212 is too big, then can break up light Lw1, Lw2, Lw3 that central authorities are partially white, the light efficiency being likely to make central authorities reduces, therefore, the size of distribution angle �� can be controlled especially when optical design.
As in figure 2 it is shown, in one embodiment, being defined as the second end points P2 further away from one end of reference axis A in the two ends of cavity disperse characteristic section 224, the second end points P2 is H along the direction of reference axis A to the distance definition of datum level BL, wherein 0 mm HL5 millimeters. In the embodiment of fig. 2, HLIt is about 0.65 millimeter, and the thickness of light emitting diode 302 approximates HL. In other words, light emitting diode 302a can be contained in matrix space 210, and light-entering surface 204 is smooth surface closing on the part of the light emitting diode 302a left and right sides, but does not limit with this, also can be atomization surface.
As shown in Figure 2 and Figure 5, in one embodiment, first area R1 has these micro structures 212 be distributed part and form a cavity disperse characteristic section 224, the line of cavity disperse characteristic section 224 head and end and datum level B form the tilt angle alpha of these micro structures 212, that is the line of cavity disperse characteristic section 224 head and end is tilt angle alpha with the datum level B angle formed, in one embodiment, 10 degree of �� 80 degree. Shown in Fig. 8, if tilt angle alpha increases to greater than 80 degree, light Ly1, Ly2, the Ly3 broken up by micro structure 212 can offset toward the direction away from reference axis A, and sheds toward both sides, becomes veiling glare and reduces light utilization. In one embodiment, 30 degree of �� 60 degree, light Ly owing to sending from the light emitting diode 302a left and right sides is partially yellow, when tilt angle alpha is in the scope of 30 degree to 60 degree, partially yellow light Ly can be played relatively straightforward effect by these micro structures 212, say, that, in optical design, the light emitting diode 302a left and right sides is allowed to be sent partially yellow light and to be closer to central authorities and send partially white light and mutually mix, can be relatively simple, thus being beneficial to minimizing Huang circle phenomenon. In the preferred embodiment of Fig. 2, the tilt angle alpha of these micro structures 212 is about 44 degree.
As shown in Figure 2 and Figure 4, in this embodiment, light-entering surface 204 has the position annular region 228 in lower half and adjacent annular region 228 and is positioned at the concave regions 230 of the first half, annular region 228 relatively concave regions 230 is close to the bottom of body 202, concave regions 230 is caved in by body 202 and is formed, in other words, matrix space 210 is surrounded by annular region 228 and concave regions 230. In one embodiment, the junction of annular region 228 and concave regions 230 forms turnover 215, but also can be formed without turnover, embodiment as shown in Figure 9. As shown in Figure 2 and Figure 4, specifically, concave regions 230 forms the first opening 232 in the junction with annular region 228, and annular region 228 forms the second opening 234 further away from concave regions 230 place, wherein the second opening 234 of annular region 228 is more than the first opening 232 of concave regions 230. The junction of annular region 228 and concave regions 230 forms turnover 215 and is advantageous in that, light-entering surface 206 can be made to have two sections can go design respectively, and can for the light of two parts, do more flexible adjustment respectively, and then be easy to allow the light of the two part do mixed light, to meet design object. Second opening 234 of annular region 228 can make the tilt angle alpha of these micro structures 212 be easier to be designed to 30 degree of �� 60 degree more than the first opening 232 of concave regions 230. As shown in Figure 2 and Figure 4, in this embodiment, concave regions 230 is smooth surface, but, concave regions 230 can be also atomization surface, refers to the following description.
Refer to shown in Figure 10, Figure 10 is the sectional view of the optical module 200b illustrating another embodiment of the present invention, light-entering surface 204 has the concave regions 230 of annular region 228 and adjacent annular region 228, and annular region 228 is provided with these micro structures 212, concave regions 230 is atomization surface, annular region 228 relatively concave regions 230 is close to the bottom of body 202, concave regions 230 is caved in by body 202 and is formed, and in this embodiment, the micro structure 212 in annular region 228 also has does atomization process. Light-entering surface 204 is not limited to this, also can be designed with several micro structures 212 in annular region 228 and concave regions 230 as shown in Figure 8. As in figure 2 it is shown, in one embodiment, the diameter of the opening peristoma 222 in matrix space 210 is DI, the height of light-entering surface 204 is HI, wherein 0.2 HI/DI3, the height H of light-entering surface 204IFor any point on light-entering surface 204 along the direction of vertical reference face B to the maximum of the distance of datum level B. In one embodiment, 0.2 HI/DI0.8, H in the embodiment of fig. 2 specificallyI/DIIt is about 0.56, in the embodiment in figure 10 HI/DIIt is about 0.69. HI/DIRatio can affect the shape in matrix space 210, work as HI/DIDuring more than 1, matrix space 210 can tend to point and alarm, and works as HI/DIDuring less than 1, matrix space 210 can tend to flat. Its H of backlight lens of known techniquesI/DIBoth being greater than greatly 1, and tend to point and alarm, this can be easy to be designed to its lightening hole lower semisection the state of going straight up to, but by H in the embodiment shown in Fig. 2 and Figure 10 of the present inventionI/DIThe inclined degree being designed to can make annular region 228 less than 1 is comparatively gentle, reduces the tilt angle alpha of these micro structures 212, thus light can be avoided directly to shed toward both sides, and then can increase light utilization.
As shown in Figure 2 and Figure 4, in one embodiment, the bottom of body 202 has a bottom surface 208, bottom surface 208 stretches out from the root edge of light-entering surface 204 and is directly or indirectly connected with light output surface 206, in embodiment shown in Fig. 2 to Fig. 4, bottom surface 208 is through a step surface 217 and is indirectly connected with light output surface 206, in other words, in this embodiment, outer surface 216 contains light output surface 206 and step surface 217, it may also be said to body 202 is surrounded by outer surface 216, bottom surface 208 and light-entering surface 204. Step surface 217 has subvertical turnover in the embodiment of fig. 2. As in figure 2 it is shown, the diameter of bottom surface 208 outer rim is DO, the height of light output surface 206 is HO, wherein 0.2 HO/DO0.8, the height H of light output surface 206OFor any point on light output surface 206 along the direction of vertical reference face B to the maximum of the distance of datum level B. As in figure 2 it is shown, this type of optical module 200a is flat, relatively it is suitable for the application of the big lighting angles of needs such as backlight module, advertising billboard, flat lamp and street lamp.
As in figure 2 it is shown, in one embodiment, light output surface 206 has a par 226 in the intersection of reference axis A Yu light output surface 206. In one embodiment, what the angle �� formed with the line of any point on the par 226 of datum mark O to light output surface 206 and reference axis A was expressed as par 226 contains angle, wherein 0 degree of �� 20 degree. In one embodiment, the par 226 of light output surface 206 is corresponding with light-entering surface 204. Owing to light-entering surface 204 is provided with several micro structures 212 at least annular region 228, and central bright spot can be reduced, therefore light output surface 206 can have par 226 without forming concave surface, thus can effectively simplify the processing procedure of optical module 200a and reduce production cost. In one embodiment, par 226 can be for example smooth surface, further, embodiment as shown in Figure 2, light output surface 206 can be for example smooth surface, and makes whole light output surface 206 all be not provided with any micro structure, and so this can further simplify processing procedure.
Shown in Figure 10, the optical module 200a Main Differences shown in optical module 200b and Fig. 2 shown in Figure 10 is in that, annular region 228 and the concave regions 230 of optical module 200b have atomization to process, but optical module 200a then without, in addition the matrix space 210 of optical module 200b comparatively point is alarmmed, and optical module 200a's is then comparatively flat. the design parameter of the optical module 200b of detailed row Figure 10 below, owing to the design parameter definition mode of optical module 200b and optical module 200a is identical, therefore please also refer to Fig. 2 and Fig. 5, the micro structure 212 cambered surface width W of optical module 200b is about 0.30 millimeter, micro structure 212 cambered surface height H is about 0.04 millimeter, the radius of curvature of micro structure 212 cambered surface be about 0.31 (this embodiment each micro structure 212 cambered surface radius of curvature all with, but it is not subject to the limits, also can be different), the distribution angle �� of these micro structures 212 is about 42 degree, the tilt angle alpha of these micro structures 212 is about 47 degree, HLIt is about 0.56 millimeter, the opening peristoma 222 diameter D in matrix space 210IIt is about 5.76 millimeters, the height H of light-entering surface 204IIt is about 3.96 millimeters, the diameter D of bottom surface 208 outer rimOIt is about 21.06 millimeters, the height H of light output surface 206OBeing about 5.34 millimeters, design above parameter all meets aforesaid correlation values scope. In addition the light output surface 206 of optical module 200b also has a par 226 in the intersection with reference axis A, and micro structure 212 is also arranged as several concentric circles.
Refer to shown in Figure 10 and Figure 11, wherein Figure 11 is the design parameter schematic diagram of the optical module 200b illustrating Figure 10. in the embodiment in figure 10, light-entering surface 204 and light output surface 206 are all formed rotationally symmetrical for rotation axes of symmetry with reference axis A, also formed symmetrical for axis of symmetry with reference axis A simultaneously, the X-axis that the straight line intersected with datum level B and section S is a rectangular coordinate, with the reference axis A Y-axis being this rectangular coordinate, and second area R2 is the first quartile of this rectangular coordinate, first area R1 is the second quadrant of this rectangular coordinate, wherein the X-coordinate of first quartile and Y coordinate be on the occasion of, the X-coordinate of the second quadrant is negative value, Y coordinate be on the occasion of, light-entering surface 204 comprises the point with following coordinate: (0, 3.96), (0.48, 3.86), (0.99, 3.48), (1.48, 2.85), (1.74, 2.21), (1.84, 1.63), (2.12, 1.43), (2.35, 1.22), (2.55, 0.99), (2.73, 0.74), (2.84, 0.56), light output surface 206 comprises the point with following coordinate: (0,5.34), (-3.22,5.18), (-4.42,4.90), (-5.56,4.42), (-6.62,3.73), (-7.54,2.86), (-8.14,2.13), (-8.61,1.30).
Refer to shown in Figure 12 and Figure 13, wherein Figure 12 is distribution curve flux figure, Figure 13 of the optical module 200b of Figure 10 is the illumination figure of the optical module 200b of Figure 10. Distribution curve flux figure by Figure 12, it is known that the lighting angle of the optical module 200b of the present invention may conform to backlight module, advertising billboard or flat lamp etc. needs the application of big lighting angle. Illumination figure through Figure 13, it is known that the optical module 200b of the present invention can produce the uniform light of Illumination Distribution.
As in figure 2 it is shown, in one embodiment, illuminator includes optical module 200a, light emitting diode 302a and circuit board 306, and the light-emitting area of light emitting diode 302a is towards the light-entering surface 204 of optical module 200a. Optical module 200a and light emitting diode 302a all may be disposed on the end face of circuit board 306, it may also be said to the bottom surface 208 of optical module 200a, the bottom surface of light emitting diode 302a and the end face of circuit board all flush with datum level B. Reference axis A by the geometric center of light emitting diode 302a bottom surface and with the plane perpendicular of described light emitting diode 302a. Light emitting diode 302a can be monocrystalline or polycrystalline light emitting diode. It is worth mentioning that, owing to the demand of high brightness is more and more general, therefore market adopt polycrystalline light emitting diode also to get more and more, but when adopting polycrystalline light emitting diode, the problem of chip imaging can be easier to occur, also even more serious, but, the present invention is provided with micro structure 212 in the annular region 228 of light-entering surface 204 and can be broken up and homogenization by the light of light emitting diode 302a, except can reducing yellow circle phenomenon, it is possible to the problem effectively reducing chip imaging.
In one embodiment, illuminator 20 includes optical module 200a, light source 302 and diffuser plate 304, and diffuser plate 304 is located at the outside of the light output surface 206 of optical module 200a, injects for the light penetrated from light output surface 206. The distance of the intersection point P3 of diffuser plate 302 and reference axis A to described datum level B is HP, wherein 15 mm HP500 millimeters, in this embodiment, HP=45 millimeters. This illuminator 20 useful application is in fields such as backlight module, advertising billboard or flat lamp, that is in this type of application, this illuminator 20 can as backlight. It is noted that in this type of application, except needing in brightness and colourity uniformly, slimming is also the trend in market, therefore it is also required to big lighting angle, and light-entering surface of the present invention 204 can be broken up light because having micro structure 212, so just may conform to these demands.
Refer to shown in Figure 14 and Figure 15, wherein Figure 14 is the sectional view of the optical module 200c illustrating further embodiment of this invention, and Figure 15 is matrix space 210 opening peristoma 222 schematic diagram illustrating the optical module 200c in Figure 14. In the embodiment shown in fig. 14, reference axis A, datum level B and light-entering surface 204 height HIDefinition mode and Fig. 2 shown in embodiment similar. That is, the matrix space 210 of optical module 200c has an opening 220, it is defined as datum mark O with the geometric center of opening peristoma 222, with by the plane definition of opening peristoma 222 for datum level B, it is defined as reference axis A, the height H of light-entering surface 204 with the straight line by datum mark O vertical reference face BIFor any point on light-entering surface 204 along the direction of vertical reference face B to the maximum of the distance of datum level B. As shown in the figure, the optical module 200a of similar Fig. 2 of optical module 200c of Figure 14, but the light output surface 206 of optical module 200c is asymmetric, and in reference axis A, the opening peristoma 222 in the matrix space 210 of optical module 200c is non-circular in addition, and can ellipse as shown in figure 15. This type of optical module 200c can be applicable to street lamp, so being frequently referred to street lamp lens. More particularly, in opening peristoma 222, the direction of the line of 2 of lie farthest away is a first direction 61, and the maximum of 61 222 liang of lateral extents of upper shed peristoma is first direction width D in a first direction1, with vertical first direction for a second direction 62, in the second direction width D that maximum is opening peristoma 222 of second direction 62 222 liang of lateral extents of upper shed peristoma2, wherein 0.2 HI/D13,0.2 HI/D23. refer to shown in Figure 16, it is the sectional view of the optical module 200d illustrating yet another embodiment of the invention. the light-entering surface 204 of the optical module 200d of Figure 16 is similar with the light-entering surface 204 of the optical module 200a of Fig. 2, the difference of optical module 200d and 200a is in that, the light output surface 208 of optical module 200d is flat condition, in addition, the outer surface 216 of optical module 200d also comprises a reflecting surface 400, the root edge of reflecting surface 400 is adjacent with the outer rim of the bottom of body 202, and the apical margin of reflecting surface 400 can directly or indirectly be connected with the outer rim of light output surface 206, in the embodiment of figure 16, the apical margin of reflecting surface 400 is through a step surface 218 and is indirectly connected with light output surface 206, and step surface 218 forms the turnover close to right angle. in this embodiment, optical module 200d is cup-shaped, and in one embodiment, reflecting surface 400d can be such as fully reflecting surface or coating reflection layer, and light can reflex to light output surface 206. optical module 200d can allow light concentrate, and can be applicable to a glass lamp, delineascope, is therefore frequently referred to again glass lamp lens.
Light-entering surface 204 also has other enforcement aspect, please with reference to shown in Figure 17 and Figure 18, as shown in the figure, light-entering surface 204 has an annular region 228 and a concave regions 230 of adjacent annular region 228, convex region 236 or flat site 238 thrin, and annular region 228 is provided with these micro structures 212, annular region 228 relatively concave regions 230, convex region or flat site are close to the bottom of body 202, and concave regions 230 is caved in by body 202 and formed. In other words, the annular region 228 of light-entering surface 204 is not limited to adjoin with concave regions 223, it is possible to adjoin with convex region 236 (as shown in figure 17) or flat site 238 (as shown in figure 18).
In simple terms, the present invention provides a kind of optical module and has the illuminator of this optical module, by being at least provided with several micro structures with cambered surface in the annular region of light-entering surface, to eliminate yellow circle phenomenon, to improve light utilization and the problem solving central bright spot.
The above is only the preferred embodiments of the present invention; it should be pointed out that, for those skilled in the art, under the premise without departing from the principles of the invention; can also making some improvements and modifications, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (29)
1. an optical module, it is characterised in that described optical module includes:
One body, forms a matrix space from the bottom of described body;
One light-entering surface, defined by the described matrix space of described body, for a light, and described light-entering surface has an annular region, wherein said light-entering surface is at least provided with several micro structures in described annular region, and each some micro structures have a cambered surface; And
One light output surface, is formed at the outer surface of described body, and wherein, the root edge of described outer surface adjoins the outer rim of the bottom of described body.
2. the optical module according to claim 1, it is characterised in that each some micro structures towards described matrix space depression by described body or are protruded and formed.
3. the optical module according to claim 2, it is characterized in that, the described cambered surface of each some micro structures is defined by each some micro structures interface between described body and described matrix space, and the cambered surface altimeter in arbitrary some micro structures at described interface place is shown as H, cambered surface width means in arbitrary some micro structures at described interface place is W, wherein 0.01 mm H 0.2 millimeter, and 0.01 millimeter of W 0.8 millimeter.
4. the optical module according to claim 2, it is characterized in that, the described cambered surface of each some micro structures is defined by each some micro structures interface between described body and described matrix space, and it is expressed as R at the cambered surface height H of arbitrary some micro structures of described interface divided by the ratio of the cambered surface width W of described arbitrary some micro structures, wherein 0.003 R 1.2.
5. the optical module according to claim 1, it is characterised in that some micro structures are several concentric circles from described matrix Space View.
6. the optical module according to claim 1, it is characterised in that some micro structures are corrugated.
7. the optical module according to claim 1, it is characterised in that some micro structures are regularly arranged or irregular alignment on described light-entering surface.
8. the optical module according to claim 1, it is characterized in that, described matrix space has an opening, with the plane definition by described opening peristoma for datum level, has identical geometry relative to the described datum level position arbitrary some micro structures in sustained height position.
9. the optical module according to claim 1, it is characterized in that, described matrix space has an opening, it is defined as datum mark with the geometric center of described opening peristoma, with the plane definition by described opening peristoma for datum level, it is defined as reference axis with the straight line by described datum mark vertical described datum level, with by a plane definition of described reference axis for cross section, described cross section divides described light-entering surface with described reference axis and forms a first area and a second area, described first area has some cavity disperse characteristic parts and forms a cavity disperse characteristic section, the one end being closer to described reference axis in the two ends of described cavity disperse characteristic section is defined as described first end points, the line of described first end points and described datum mark and described datum level form the distribution angle �� of some micro structures, wherein 20 degree of �� 90 degree.
10. the optical module according to claim 9, it is characterised in that 20 degree of �� 60 degree.
11. the optical module according to claim 9, it is characterized in that, being defined as one second end points further away from one end of described reference axis in the two ends of described cavity disperse characteristic section, described second end points is H along the distance definition of the direction extremely described datum level of described reference axisL, wherein 0 mm HL5 millimeters.
12. the optical module according to claim 1, it is characterized in that, described matrix space has an opening, it is defined as datum mark with the geometric center of described opening peristoma, with the plane definition by described opening peristoma for datum level, it is defined as reference axis with the straight line by described datum mark vertical described datum level, with by a plane definition of described reference axis for cross section, described cross section divides described light-entering surface with described reference axis and forms a first area and a second area, described first area has some cavity disperse characteristic parts and forms a cavity disperse characteristic section, the line of described cavity disperse characteristic section head and end and described datum level form the tilt angle alpha of some micro structures, wherein 10 degree of �� 80 degree.
13. the optical module according to claim 12, it is characterised in that 30 degree of �� 60 degree.
14. the optical module according to claim 1, it is characterized in that, described matrix space has an opening, it is defined as datum mark with the geometric center of described opening peristoma, with the plane definition by described opening peristoma for datum level, being defined as reference axis with the straight line by described datum mark vertical described datum level, described light output surface has a par in described reference axis and described light output surface intersection.
15. the optical module according to claim 14, it is characterised in that described par is smooth surface.
16. the optical module according to claim 1, it is characterized in that, described light-entering surface has a concave regions of adjacent described annular region, and the junction of described annular region and described concave regions forms turnover, the more described concave regions of described annular region is close to the bottom of described body, and described concave regions is formed by described body recess.
17. the optical module according to claim 16, it is characterized in that, described concave regions forms one first opening in the described junction with described annular region, and described annular region forms one second opening further away from described concave regions place, described second opening of wherein said annular region is more than described first opening of described concave regions.
18. the optical module according to any one of claim 1��15, it is characterized in that, described light-entering surface has a concave regions of adjacent described annular region, and described concave regions is smooth surface, the more described concave regions of described annular region is close to the bottom of described body, and described concave regions is formed by described body recess.
19. the optical module according to any one of claim 1��15, it is characterized in that, described light-entering surface has a concave regions of adjacent described annular region, and described concave regions is atomization surface, the more described concave regions of described annular region is close to the bottom of described body, and described concave regions is formed by described body recess.
20. the optical module according to any one of claim 1��6, it is characterised in that described matrix space has an opening, with the plane definition by described opening peristoma for datum level, the diameter of the opening peristoma in described matrix space is DI, the height of described light-entering surface is HI, wherein 0.2 HI/DI3, the height H of described light-entering surfaceIFor any point on described light-entering surface along the direction of vertical described datum level to the maximum of distance of described datum level.
21. the optical module according to claim 20, it is characterised in that 0.2 HI/DI�Q0.8��
22. the optical module according to claim 21, it is characterised in that the bottom of described body has a bottom surface, described bottom surface stretches out from the root edge of described light-entering surface and is directly or indirectly connected with described light output surface, and the diameter of described bottom surface outer rim is DO, the height of described light output surface is HO, wherein 0.2 HO/DO0.8, the height H of described light output surfaceOFor any point on described light output surface along the direction of vertical described datum level to the maximum of distance of described datum level.
23. the optical module according to any one of claim 1��6, it is characterized in that, described matrix space has an opening, with the plane by described opening peristoma for datum level, the described opening peristoma in described matrix space is non-circular, in described opening peristoma, the direction of the line of 2 of lie farthest away is for a first direction, and the maximum of described opening peristoma two lateral extent is first direction width D in said first direction1, with vertical described first direction for a second direction, the second direction width D that maximum is described opening peristoma of described opening peristoma two lateral extent in this second direction2, the height of described light-entering surface is HI, wherein 0.2 HI/D13,0.2 HI/D23, the height H of described light-entering surfaceIFor any point on described light-entering surface along the direction of vertical described datum level to the maximum of distance of described datum level.
24. the optical module according to any one of claim 1��15, it is characterized in that, the described outer surface of described body comprises a reflecting surface, the root edge of described reflecting surface is adjacent with the outer rim of the bottom of described body, and the apical margin of described reflecting surface is directly or indirectly connected with the outer rim of described light output surface.
25. the optical module according to any one of claim 1��15, it is characterized in that, described light-entering surface has a concave regions of adjacent described annular region, a convex region or a flat site thrin, the more described concave regions of described annular region, described convex region or described flat site are close to the bottom of described body, and described concave regions is formed by described body recess.
26. the optical module according to any one of claim 1��17, it is characterised in that the material of described body is transparent material.
27. an illuminator, it is characterised in that described illuminator includes:
One optical module according to any one of claim 1��15; And
One light emitting diode, the light-emitting area of described light emitting diode is towards the described light-entering surface of described optical module.
28. the illuminator according to claim 27, it is characterised in that described light emitting diode is polycrystalline light emitting diode.
29. an illuminator, it is characterised in that described illuminator includes:
One optical module according to claim 22;
One light source; And
One diffuser plate, is located at the outside of the described light output surface of described optical module, injects for the light penetrated from described light output surface.
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| CN201410620057.1A CN105627250A (en) | 2014-11-05 | 2014-11-05 | Optical assembly and illuminating device with same |
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| US11499696B2 (en) | 2018-03-15 | 2022-11-15 | Seoul Semiconductor Co., Ltd. | Light emitting module and lens |
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