CN205333903U - Equal worn -out fur of microlens array that concentric circular arc curve was arranged - Google Patents

Abstract

The utility model discloses an equal worn -out fur of microlens array that concentric circular arc curve was arranged, including the ya keli board, the lower surface of asia gram force board is the reflecting surface, and the upper surface is the light -emitting surface, and the side is surperficial for going into light, the light -emitting is carved with a plurality of v -shaped groove that are concentric circular arc curve form and arrange on the surface, v -shaped groove distribute shi yong yakeli board light -emitting surface with go into the not equidistant concentric circular arc curve of crest line central point as the centre of a circle that intersects on the light surface on, v -shaped groove extends to the terminal face of ya keli board by going into the light surface always. Equal worn -out fur to have LED light source number few, energy -efficient, light guide efficiency is high, the light -emitting is even, advantages such as luminance height.

Description

A kind of microlens array equal tabula rasa of isocentric circular arc curved arrangement

Technical field

This utility model relates to a kind of side equal tabula rasa of incident type LED planar lamp, belongs to LED illumination design and precise light electric parts manufactures field, be specifically related to the equal tabula rasa of microlens array of a kind of isocentric circular arc curved arrangement。

Background technology

LED belongs to total solids cold light source, has that energy-efficient, environmental protection, extra long life, light is healthy, protection vision, safety coefficient advantages of higher。According to the difference entering light mode, LED light guide plate is divided into straight-down negative and side incident type two kinds。This utility model relates generally to the design and fabrication method of a kind of side equal tabula rasa of incident type flat lamp。LED is positioned over the both sides up and down of backlight by side incident type, and the adjustment of layout greatly reduces the use of LED。Side entering type flat lamp lamp body is frivolous, it is simple to install, and good looking appearance, so side entering type flat lamp accounts for main equal status in the market。The processing method of the equal tabula rasa of current LED can be divided into silk-screen making, chemical etching, Laser Processing and micro-cutting processing。Silk-screen production method technology maturation, cost is low, is suitable for processing large-sized equal tabula rasa。But the making of the equal tabula rasa of silk-screen be unable to do without ink, and ink is volatile, all poor stabilities of light, and environmental pollution are serious, and service life is short。The equal tabula rasa of chemical etching mode can cut randomly size, splicing uses, and phototranstormation efficiency is high, can be made into abnormal shape。But its optical surface is coarse, its site degree of depth is by the restriction of site lateral dimension precision, and etching cost is high, and environmental pollution is serious。The equal tabula rasa long service life of laser processing mode, all light is uniform, good stability。But its production efficiency is low, it is difficult to produce in enormous quantities。Micro-cutting mode utilizes single-point diamond cutter to carry out forming and cutting, fine structure good forming effect on all light base boards, and phototranstormation efficiency is high, good stability。

For the shortcoming solving existing mainstream technology, this utility model have devised the equal tabula rasa of microlens array structure of a kind of isocentric circular arc curved surface arrangement, adopt single led as illuminating source, there is unilateral side entering type compared with mainstream technology luminous, light source led lamp number is few, energy-efficient, and cost is low, guide-lighting efficiency is high, the features such as luminescence is uniform；The equal tabula rasa of this utility model design uses micro-cutting processing method, and the dimensional accuracy of microlens array and form accuracy can accurately ensure, guide-lighting good stability。

Utility model content

The purpose of this utility model is in that to reduce the number of LED illuminating source in LED planar lamp, reduces the overall size of backlight module, and ensures the uniformity of light, solve equal tabula rasa making precision in prior art low, guide-lighting poor stability, guide-lighting efficiency is low, the problems such as outgoing light homogeneity is low。

Therefore, this utility model provides the equal tabula rasa of microlens array of a kind of isocentric circular arc curved arrangement, including unilateral side entering type acrylic board, the lower surface of described acrylic board is reflecting surface, upper surface is light output surface, side is the light-entering surface for placing LED light source, described light output surface is carved with some vee-cuts arranged in isocentric circular arc curve-like, described vee-cut is distributed on the isocentric circular arc curve of the unequal-interval that the crest line central point intersected with light-entering surface with acrylic board light output surface is the center of circle, described vee-cut is extended to acrylic board terminal surface by light-entering surface, the degree of depth h of described vee-cut is gradually increased to acrylic board terminal surface direction by light-entering surface, the spacing L of adjacent two vee-cuts is gradually reduced to acrylic board end face direction by light-entering surface。

Further, described vee-cut two sides adopt unsymmetric structure, two sides are mutually 120 ~ 150 degree of angles, 60 ~ 75 degree are become with normal angle near the side of light-entering surface, another side becomes 75 ~ 60 degree with normal angle, and near side and the normal angle of light-entering surface big and another side and normal angle。

Further, the degree of depth h of described vee-cut is gradually increased to acrylic board terminal surface direction by light-entering surface, and value is 100 ~ 600 μm。

Further, the spacing L of adjacent two vee-cuts successively decreases from light-entering surface successively to acrylic board terminal surface direction, spacing L span is 30 ~ 2000 μm, and spacing L successively decreases with 100 μm for interval in 100 ~ 2000 μ m, and spacing L successively decreases with 10 μm for interval in 30 ~ 100 μ m。

Further, the reflecting surface of described acrylic board is pasted with direct reflection paster。

Transmission scattering theory according to light, when light injects optically thinner medium from optically denser medium, when the angle of incidence of light reaches certain angle and critical angle, no longer has refraction light injection, and this time is totally reflected at optically thinner medium and optically denser medium interface。When light source is arranged on acrylic flat board one side, only it is not reaching to the total reflection condition of light near a pocket of light source and makes the light end face from plate and bottom surface reflect, most light is propagated forward in generation total reflection in acrylic board, so acrylic board end face is only luminous near the small part region of light source, and major part region not light penetrates and presents dark state, it is impossible to reach the requirement effect of area source。In order to break this rule, end face at acrylic board makes the vee-cut of a kind of circular curve arrangement as microlens structure, ensure the place equal with light source distance, exiting surface brightness is consistent, the lenticule structure on two sides on surface, lenticular spacing, the lenticular degree of depth is according to strict luminous intensity distribution design, the lenticule rough structural deterioration light path in acrylic board internal transmission, thus the total reflection condition having broken light makes the light end face injection from sub-gram plate, thus reaching the effect of leaded light。Paste reflective paster in the bottom surface of acrylic board, utilize the light that light source is launched to greatest extent, light downward for light path is reflexed on microlens structure, and then penetrate from the end face of acrylic board。

This utility model compared with prior art has the advantage that

(1) making with silk-screen compared with equal tabula rasa and the chemistry equal tabula rasa of making, the equal tabula rasa of this utility model design adopts micro-cutting processing, long service life, green non-pollution, environmental friendliness。

(2), compared with making equal tabula rasa, the equal tabula rasa of chemical etching with silk-screen and laser machining equal tabula rasa, dimensional accuracy and the form accuracy of the equal tabula rasa microlens array of this utility model design can accurately ensure, make the internal light path of equal tabula rasa strictly controlled。

(3), compared with making equal tabula rasa, the equal tabula rasa of chemical etching with silk-screen and laser machining equal tabula rasa, the equal tabula rasa leaded light efficiency of this utility model design is high, uniform in light emission, and brightness is high。

Accompanying drawing explanation

The equal tabula rasa three-dimensional appearance schematic diagram that Fig. 1 designs for this utility model。

The equal tabula rasa cross sectional shape schematic diagram that Fig. 2 designs for this utility model。

The equal tabula rasa leaded light principle schematic that Fig. 3 designs for this utility model。

The equal tabula rasa machining schematic diagram that Fig. 4 designs for this utility model。

Shown in figure it is: 1-acrylic board；2-V shape groove；3-LED light source；4-fixture；5-skive；6-is most advanced and sophisticated；7-rotation dish；8-Precision trimming rotation dish；9-the first side；10-the second side；11-light output surface；12-reflecting surface；13-light-entering surface；14-acrylic board terminal surface；15-central point。

Detailed description of the invention

In order to be best understood from this utility model, below in conjunction with drawings and Examples, this utility model is described further, but the scope that this utility model claims is not limited to the scope that embodiment represents。

As shown in Figure 1, a kind of microlens array equal tabula rasa of isocentric circular arc curved arrangement, including unilateral side entering type acrylic board 1, the lower surface of described acrylic board 1 is reflecting surface 12, and it is pasted with direct reflection paster, and upper surface is light output surface 11, side is the light-entering surface 13 for placing LED light source 3, single led light source 3 is placed on light-entering surface 13 point midway of acrylic board 1, and LED light source 3 is right against light-entering surface 13, and is 500 ~ 1000 μm with light-entering surface 13 distance。Described light output surface 11 is carved with some vee-cuts 2 arranged in isocentric circular arc curve-like, described vee-cut 2 is distributed on the isocentric circular arc curve of the unequal-interval that the crest line central point 15 intersected with light-entering surface 13 with acrylic board 1 light output surface 11 is the center of circle, described vee-cut 2 is extended to acrylic board terminal surface 14 by light-entering surface 13, the degree of depth h of described vee-cut 2 is gradually increased to acrylic board terminal surface 14 direction by light-entering surface 13, and the spacing L of adjacent two vee-cuts 2 is gradually reduced to acrylic board end face 14 direction by light-entering surface 13。

Specifically, as in figure 2 it is shown, described V groove 2 is made up of the first side 9 and the second side 10, away from the first side 9 and the light output surface 11 one-tenth 30 degree of light-entering surface 13, near the second side 10 and the exiting surface 11 one-tenth 15 degree of light-entering surface 13。

The degree of depth h of described vee-cut 2 is gradually increased to acrylic board terminal surface 14 direction by light-entering surface 13, and value is 100 ~ 600 μm。

The spacing L of adjacent two vee-cuts 2 successively decreases from light-entering surface 13 successively to acrylic board terminal surface 14 direction, spacing L span is 30 ~ 2000 μm, spacing L successively decreases with 100 μm for interval in 100 ~ 2000 μ m, and spacing L successively decreases with 10 μm for interval in 30 ~ 100 μ m。

As it is shown on figure 3, single led light source 3 is placed on the side of acrylic board 1, the light section mil(unit of angular measure) that LED light source 3 is launched becomes lambertian angle onwards transmission in acrylic board 1。Transmission dispersion theory according to light, a pocket near LED light source 3 is not reaching to the total reflection condition of light and makes light be refracted to light output surface 11 and the reflecting surface 12 of acrylic board 1, reflecting surface 12 is pasted with reflective paster so that the downward light direct reflection of all light paths is to each vee-cut 2。Light output surface 11 that other light launched by LED light source 3 make light be refracted to acrylic board 1 due to its full launching condition of action breaks down of vee-cut 2 and reflecting surface 12, the effect of reflecting surface 12 is to be transmitted on vee-cut 2 by light downward for light path used。Final light penetrates from the light output surface 11 of acrylic board 1, thus reaching the effect of leaded light。Vee-cut 2 is arranged on isocentric circular arc curve, it is possible to make the local luminosity equal with light source distance consistent。On light output surface 11, the size of vee-cut 2 distribution density directly affects the brightness in territory, output optical zone, and on light output surface 11, to be distributed more intensive corresponding territory, output optical zone brightness more high for vee-cut 2。So in order to equal tabula rasa exiting surface brightness is high and uniformly, less near the groove distribution density of light source, the groove distribution density away from light source is relatively big, and namely the spacing L of adjacent vee-cut 2 is gradually reduced to acrylic board end face 14 by light-entering surface 13。On light output surface 11, the size of the gash depth h of vee-cut 2 directly affects the uniformity of territory, output optical zone brightness, and vee-cut 2 gash depth h is gradually increased to acrylic board end face 14 by light-entering surface 13, it is possible to utilize light to greatest extent, makes exiting surface brightness uniformity。

As shown in Figure 4, the manufacture method of a kind of equal tabula rasa of microlens array as mentioned, including step:

1) utilizing oilstone that tip 6 accurate repair of skive 5 is made into predetermined V-arrangement, be then arranged on machine tool chief axis by skive 5, described skive 5 is made up of diamond abrasive and resinoid bond, and diamond abrasive granularity is 1500 ~ 4000 orders；

2) fixture 4 is used to be horizontally arranged on the rotating suction disc 7 on Precision trimming rotation dish 8 top by high printing opacity acrylic board 1, cushion block is utilized to make acrylic board 1 than clamping after the high 1 ~ 2mm of fixture 4, and make the central point 15 of acrylic board 1 overlap with Precision trimming rotation dish 8 center of circle, the top rotation dish 7 of Precision trimming rotation dish 8 can produce electromagnetic attraction, it is possible to fixture 4 adsorbed close that material is No. 45 steel is lived；

3) starting Precision trimming rotation dish 8 and do uniform rotation, its rotating speed n2 is 100 ~ 300r/min, starts skive 5 simultaneously and does downwards feed motion, and each feeding depth is 1 ~ 5 μm, is processed by vee-cut 2 successively。

Specifically, the rotating speed n1 of described skive 5 is 2000 ~ 5000r/min, and doing downwards straight-line feed speed v is 0.1 ~ 0.2m/min, makes to be water-cooled。

Skive 5 diameter after finishing is 60 ~ 120mm, and the most advanced and sophisticated 6 two sides angles of its V-arrangement are 30 ~ 60 degree。

Described equal tabula rasa adopts micro-cutting processing, and dimensional accuracy and the form accuracy of equal tabula rasa microlens array can accurately ensure, makes the internal light path of equal tabula rasa strictly controlled, and long service life, guide-lighting efficiency is high, uniform in light emission。

Above-described embodiment of the present utility model is only for clearly demonstrating this utility model example, and is not the restriction to embodiment of the present utility model。For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description。Here without also cannot all of embodiment be given exhaustive。All any amendment, equivalent replacement and improvement etc. made within spirit of the present utility model and principle, should be included within this utility model scope of the claims。

Claims (5)

1. the equal tabula rasa of the microlens array of an isocentric circular arc curved arrangement, including unilateral side entering type acrylic board (1), the lower surface of described acrylic board (1) is reflecting surface (12), upper surface is light output surface (11), side is for be used for placing the light-entering surface (13) of LED light source (3), it is characterized in that: described light output surface (11) is carved with some vee-cuts (2) arranged in isocentric circular arc curve-like, described vee-cut (2) is distributed on the isocentric circular arc curve of the unequal-interval that the crest line central point (15) intersected with light-entering surface (13) with acrylic board (1) light output surface (11) is the center of circle, described vee-cut (2) is extended to acrylic board terminal surface (14) by light-entering surface (13), the degree of depth h of described vee-cut (2) is gradually increased to acrylic board terminal surface (14) direction by light-entering surface (13), the spacing L of adjacent two vee-cuts (2) is gradually reduced to acrylic board end face (14) direction by light-entering surface (13)。

2. the equal tabula rasa of microlens array according to claim 1, it is characterized in that: described vee-cut (2) two sides adopt unsymmetric structure, two sides are mutually 120 ~ 150 degree of angles, 60 ~ 75 degree are become with normal angle near the side of light-entering surface (13), another side becomes 75 ~ 60 degree with normal angle, and near side and the normal angle of light-entering surface (13) big and another side and normal angle。

3. the equal tabula rasa of microlens array according to claim 1, it is characterized in that: the degree of depth h of described vee-cut (2) is gradually increased to acrylic board terminal surface (14) direction by light-entering surface (13), and value is 100 ~ 600 μm。

4. the equal tabula rasa of microlens array according to claim 1, it is characterized in that: the spacing L of adjacent two vee-cuts (2) successively decreases from light-entering surface (13) successively to acrylic board terminal surface (14) direction, spacing L span is 30 ~ 2000 μm, spacing L successively decreases with 100 μm for interval in 100 ~ 2000 μ m, and spacing L successively decreases with 10 μm for interval in 30 ~ 100 μ m。

5. the equal tabula rasa of microlens array according to claim 1, it is characterised in that: the reflecting surface (12) of described acrylic board (1) is pasted with direct reflection paster。