CN101464591A - Illumination unit and its optical film group - Google Patents
Illumination unit and its optical film group Download PDFInfo
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- CN101464591A CN101464591A CNA2007101599405A CN200710159940A CN101464591A CN 101464591 A CN101464591 A CN 101464591A CN A2007101599405 A CNA2007101599405 A CN A2007101599405A CN 200710159940 A CN200710159940 A CN 200710159940A CN 101464591 A CN101464591 A CN 101464591A
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- water chestnut
- chestnut mirror
- diffused component
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Abstract
The invention relates to an optical membrane group used for a luminescence unit. The luminescence unit is provided with at least two light sources and emits a light. The optical membrane group includes a first prism element and a first diffused component. The first prism element adopts a membrane piece with the thickness being less than 0.5 mm, and is provided with a first base material and at least one first prism layer arranged on the first base material. The first diffused component adopts a membrane piece with the thickness being less than 0.5 mm and abuts on the first prism element, wherein, the light is emitted directly onto the first prism element or the first diffused component, the light sources have a plurality of projection points projected onto a light-emitting surface of the optical membrane group, and the yield value of each projection point is smaller than 1.
Description
Technical field
The present invention relates to a kind of optical diaphragm group, particularly about a kind of optical diaphragm group that is used for the straight-down negative luminescence unit, i.e. luminescence unit and optical diaphragm group thereof.
Background technology
Owing to the development of lcd technology, traditional CRT display is replaced by liquid crystal indicator gradually in recent years.Wherein, because liquid crystal can't self luminous characteristic, therefore, in liquid crystal indicator, must utilize a backlight module as its backlight.
Please refer to shown in Figure 1ly, existing a kind of backlight module 1 comprises a plurality of light source S, an optical diaphragm group 10 and a diffuser plate B.Wherein, light source S is that example explains with the cold cathode fluorescent lamp pipe, and described light source S and to be spaced setting.Diffuser plate B then is arranged on the light source S, and above-mentioned optical diaphragm group 10 then is arranged on the diffuser plate B.
The directly-down light source S that diffuser plate B has backlight module 1 is scattered, and makes light source S form the function of uniform surface light source in diffuser plate B.In prior art, the spacing between the light source S is P, and the distance of light source S and diffuser plate B is D, and D/P must be more than or equal to just can go up forming one evenly and do not have the area source of shade (Mura) in diffuser plate B more than 0.65.Wherein uniform area light source is defined as: the amount of brightness measured value of any point must be more than or equal to 70% divided by the high-high brightness measuring value on the exiting surface of diffuser plate B on the exiting surface of diffuser plate B.Because the light type of outgoing diffuser plate B is bigger, therefore can optical diaphragm group 10 be set on diffuser plate B usually so that bright dipping light type is adjusted.
Generally speaking, optical diaphragm group 10 can be divided into water chestnut mirror diaphragm 11 and diffusion barrier sheet (diffusion sheet) 12,12 '.Therefore, for example can utilize two diffusion barrier sheets 12,12 ' folder to establish a water chestnut mirror diaphragm 11, make light, in by optical diaphragm group 10 time, form the light type and comparatively concentrate and uniform surface light source by diffuser plate B.In addition, backlight module 1 will design for considering more by force for the light intensity perpendicular to exiting surface F with the user, so each light source S is projected to the yield value (Gain) of the subpoint F1 on the exiting surface F of optical diaphragm group 10 greater than 1.Wherein, yield value is defined as: in the ray cast point F1 of light source S outgoing, and the luminous intensity of vertical exiting surface when the luminous intensity of vertical exiting surface was divided by no diffuser plate B and optical diaphragm group 10 when diffuser plate B and optical diaphragm group 10 were arranged.
Yet, (optical diaphragm group 10 and diffuser plate B among Fig. 1 do not draw according to actual ratio compared to the optical diaphragm group 10 of thinner thickness, in fact diffuser plate B should be thicker than the thickness of optical diaphragm group 10), diffuser plate B is because thicker (the about 1.5mm～2.0mm) of thickness, not only material cost is high, and because the thickness of diffuser plate B goes out many greatly than the thickness of optical diaphragm group 10, therefore the light R by light source S injection moulding also can produce more energy loss through diffuser plate B, and then also can cause the reduction of backlight module 1 brightness.Moreover because backlight module continues towards the progress of maximizing, incident is the demand of lightweight and slimming.The diffuser plate B of prior art makes in the mode of injection mo(u)lding or extrusion molding, can't continue to increase the concentration that diffusion particle adds owing to make the restriction of going up mobile (coefficient of viscosity), cause to increase dispersion effect and must increase thickness and weight, can cause the integral thickness of backlight module 1 to increase, and then influence the assembly cost and the design cost of liquid crystal indicator.
Therefore, how to design a kind of light diffusion, thinner thickness, weight of improving than light and lower-cost luminescence unit and optical diaphragm group thereof, real one of the present important topic that belongs to.
Summary of the invention
Because above-mentioned problem the objective of the invention is to overcome the deficiencies in the prior art and defective, a kind of light diffusion, thinner thickness, weight of improving is proposed than light and lower-cost luminescence unit and optical diaphragm group thereof.
For reaching above-mentioned purpose, the invention provides a kind of optical diaphragm group, be used for a luminescence unit, luminescence unit has at least two light sources and sends a light respectively, and optical diaphragm group comprises one first water chestnut mirror element and one first diffused component.The first water chestnut mirror element is a thickness less than 0.5 millimeter diaphragm, and has one first base material and at least one first water chestnut mirror layer, and the first water chestnut mirror layer is arranged on first base material.First diffused component is a thickness less than 0.5 millimeter diaphragm, and be adjacent to the first water chestnut mirror element, wherein light directly is incident upon the first water chestnut mirror element or first diffused component, and described light source has a plurality of subpoints on the exiting surface of the optical diaphragm group of being projected to, and the yield value of each subpoint is less than 1.
For reaching above-mentioned purpose, the present invention also provides a kind of luminescence unit, comprises at least two light sources and an optical diaphragm group.Described light source sends a light respectively, and light directly is incident upon optical diaphragm group, and described light source has a plurality of subpoints on the exiting surface of the optical diaphragm group of being projected to, and the yield value of each subpoint is less than 1.Optical diaphragm group is adjacent to described light source, and optical diaphragm group comprises one first water chestnut mirror element and one first diffused component.The first water chestnut mirror element is a thickness less than 0.5 millimeter diaphragm, and has one first base material and at least one first water chestnut mirror layer, and the first water chestnut mirror layer is arranged on first base material.First diffused component is a thickness less than 0.5 millimeter diaphragm, and is adjacent to the first water chestnut mirror element.
From the above, the present invention has following useful technique effect: the light that a kind of luminescence unit of the present invention and optical diaphragm group thereof are sent light source directly is incident upon thickness less than 0.5 millimeter the first water chestnut mirror element or first diffused component, the equalizing light rays that light source is sent.Compared with prior art, the light that the present invention utilizes the optical diaphragm group of thinner thickness that light source is sent produces diffusion and homogenising, so not only can reduce material cost, and can reduce light because of passing the energy loss that causes than heavy-gauge sheeting, and and then increase the emitting brightness of luminescence unit.
In addition, for strengthening the scattering function of optical diaphragm group, also can be by structural change, for example each water chestnut mirror diaphragm utilize the diffusion substrates of two water chestnut mirror layers, diffused component mix the diffusion material, change water chestnut mirror shape or increase by one second water chestnut mirror diaphragm and mode such as one second diffusion barrier sheet is reached.Again, by optical diaphragm group of the present invention, the light source of luminescence unit to the distance of optical diaphragm group can make luminescence unit form an area source divided by the spacing of light source less than 0.65 (being D/P＜0.65).Again, each light source is projected to a plurality of subpoints on the exiting surface of optical diaphragm group, and the luminous intensity yield value of the vertical exiting surface of each subpoint is less than 1.Its expression, optical diaphragm group produces the effect of beam split to light, to increase the non-light intensity of exiting surface when viewing and admiring that be right against of user.And more can be by a plurality of optical diaphragm group superimposed or fit (Roller to Roller) the mode of the present invention improves the light diffusion of luminescence unit, also can enhance productivity thus, reduces material cost and make the luminescence unit lightweight.
Description of drawings
Fig. 1 is a kind of backlight module synoptic diagram of prior art;
Fig. 2 A is a kind of luminescence unit synoptic diagram of first embodiment of the invention;
Fig. 2 B is the luminous intensity contrast synoptic diagram of luminescence unit of the present invention when not having optical diaphragm group;
Fig. 3 is that the luminescence unit one of first embodiment of the invention changes the aspect synoptic diagram;
Fig. 4 A to Fig. 4 C is the different aspect synoptic diagram that change of the cross sectional shape of the first water chestnut mirror element;
Fig. 5 A to Fig. 5 D is the different three-dimensional oblique views that change aspect of the first water chestnut mirror element;
Fig. 6 is another variation aspect synoptic diagram of first diffused component;
Fig. 7 A is a kind of luminescence unit synoptic diagram of second embodiment of the invention;
Fig. 7 B is a variation aspect synoptic diagram of the luminescence unit of second embodiment of the invention;
Fig. 8 is a kind of luminescence unit synoptic diagram of third embodiment of the invention;
Fig. 9 A is a kind of luminescence unit synoptic diagram of fourth embodiment of the invention;
Fig. 9 B and Fig. 9 C are other variation aspect synoptic diagram of luminescence unit of fourth embodiment of the invention;
Figure 10 is another variation aspect synoptic diagram of the luminescence unit of fourth embodiment of the invention;
Figure 11 is the another variation aspect of the luminescence unit of a fourth embodiment of the invention synoptic diagram;
Figure 12 is a kind of luminescence unit synoptic diagram of fifth embodiment of the invention.
Symbol description among the figure
1 backlight module
10,20,30,30 ', 40,50a～50e, 60 optical diaphragm group
11 water chestnut mirror diaphragms
12,12 ' diffusion barrier sheet
2,3,4,5,5a～5d, 6 luminescence units
21,21a～21g, 31,41,51,61 first water chestnut mirror elements
211,311,411,511 first base materials
212,212a～212g, 312,412,512 first water chestnut mirror layers
22,22 ', 22a, 32,42,52,62 first diffused components
221,321,421,521 first diffusion layers
222,222a, 322,422,522 first diffusion substrates
413 second water chestnut mirror layers
53 second water chestnut mirror elements
531 second base materials
532 Mitsubishi's mirror layers
54,64 second diffused components
541 second diffusion layers
542 second diffusion substrates
The A clearance
The B diffuser plate
The C adhesive agent
The D distance
The F exiting surface
F1, F2 subpoint
The G yield value
I
1, I
2Luminous intensity
L1, La～Lg first water chestnut mirror
The L2 second water chestnut mirror
L3 Mitsubishi mirror
O1 first optical element
O2 second optical element
The P spacing
R light
The U end face
The S light source
The θ angle
Embodiment
Hereinafter with reference to relevant drawings, illustrate that wherein similar elements is represented with same numeral according to luminescence unit of the present invention and optical diaphragm group thereof.
First embodiment
Please refer to shown in Fig. 2 A, a kind of luminescence unit 2 of first embodiment of the invention for example is a bottom-lighting type back light module, and it comprises at least two light source S and an optical diaphragm group 20.In present embodiment, be that example explains with a plurality of light source S.Certainly, luminescence unit 2 also can be the light source module of lighting device, billboards or other electronic installation.
Light source S for example is cold cathode fluorescent lamp pipe, hot-cathode fluorescent light tube, outer electrode fluorescent lamp, light emitting diode or Organic Light Emitting Diode, be that example explains with the cold cathode fluorescent lamp pipe in present embodiment, and described light source S sends a light R respectively.
Optical diaphragm group 20 is adjacent to described light source S, and optical diaphragm group 20 comprises one first water chestnut mirror element 21 and one first diffused component 22.The light R that described light source S is sent directly is incident upon the first water chestnut mirror element 21 or first diffused component 22, and being incident upon the first water chestnut mirror element 21 with light R earlier in this is that example explains.
The first water chestnut mirror element 21 is a thickness less than 0.5 millimeter diaphragm, and it has one first base material 211 and at least one first water chestnut mirror layer 212, in present embodiment, be that example explains with one first water chestnut mirror layer 212, the first water chestnut mirror layer 212 also is arranged on first base material 211.The first water chestnut mirror element 21 is fitted with first diffused component 22 with a surface of first base material 211 or is superimposed.
The material of first base material 211 for example is polystyrene (polystyrene, PS), polycarbonate (polycarbonate, PC), styrene-methyl methacrylate resin (methylstyrene, MS), polymethylmethacrylate (polymethylmethacrylate, PMMA) or polyethylene terephthalate (polyethylene terephthalate, PET) at least one of them.In addition, the first water chestnut mirror layer 212 except that can utilize a hot roll extrusion or a hot concora crush mode and first base material 211 integrally formed, also can utilize for example material such as ultraviolet light photopolymerization resin or thermosetting resin, cooperate UV cured mode to be formed on first base material 211 with roll extrusion again.Again, the first water chestnut mirror layer 212 has a plurality of first water chestnut mirror L1, the cross sectional shape of the described first water chestnut mirror L1 is selected from arc, semicircle, fan-shaped, triangle, polygon, irregular shape and group that combination constituted thereof, in present embodiment, the cross sectional shape of the described first water chestnut mirror L1 is that example explains with the triangle.
First diffused component 22 is a thickness less than 0.5 millimeter diaphragm, and it also is adjacent to the first water chestnut mirror element 21.First diffused component 22 can utilize an extrusion, to extrude extension, printing or coating method and form, and in this, first diffused component 22 has one first diffusion layer 221, and is formed at first base material 211 of the first water chestnut mirror element 21.Wherein, first diffusion layer 221 has a diffusion material, and the material of diffusion material for example is titania (TiO
2), barium sulphate (BaSO
4) or organic diffusion particle at least one of them.
Therefore, do the beam split and imaging to the first diffused component 22 of multi-angle via the water chestnut mirror structure main peak that light intensity is the highest of the first water chestnut mirror layer 212 of the first water chestnut mirror element 21, first diffusion layer 221 by first diffused component 22 spreads light R more equably again, and the light R that described light source S is sent changes uniform surface light source into by line source.And optical diaphragm group 20 by present embodiment, D represents the distance of light source S to optical diaphragm group 20, and P represents the spacing between each light source S, and the D/P value can form an area source less than 0.65, required D/P value than prior art must be little greater than 0.65, so can reduce the thickness of luminescence unit 2.In addition, each light source S has a plurality of subpoint F1 on the exiting surface F of optical diaphragm group of being projected to 20, and the yield value of each subpoint F1 is respectively less than 1.Wherein, please be simultaneously with reference to shown in Fig. 2 A and Fig. 2 B, yield value G is defined as, the light of light source S outgoing, the luminous intensity I of the subpoint F1 of vertical exiting surface when optical diaphragm group 20 is arranged
1The luminous intensity I of the subpoint F2 of vertical exiting surface during divided by no optical diaphragm group 20
2(G=I
1/ I
2).That is to say that optical diaphragm group 20 can produce the effect of beam split to light, to increase the non-light intensity of exiting surface F when viewing and admiring that be right against of user.
Please refer to shown in Figure 3, the first water chestnut mirror element 21 and first diffused component 22 ' relative position non-limiting, first diffused component 22 ' also can be arranged at a side in the face of light source S.Wherein, first diffused component 22 ' have one first diffusion layer 221 and one first diffusion substrates 222, and the material of first diffusion substrates 222 can be identical with first base material 211, for example be PS, PC, MS, PMMA or PET at least one of them, the first water chestnut mirror layer 212 combines with first diffusion substrates 222.Has an end face U respectively to the described first water chestnut mirror L1 of small part on the first water chestnut mirror layer 212, described end face U can utilize back processing or Mould design, make to the described end face U of small part and be positioned at same plane in fact, be beneficial to first diffusion substrates 222 coat adhesive agent C with combine to the described end face U of small part, it is example that Fig. 3 has an end face U respectively with the described first water chestnut mirror L1 whole on the first water chestnut mirror layer 212, and described end face U is positioned at same plane and is combined into example with first diffusion substrates 222.What wherein need specify is, does not all show adhesive agent in other is graphic, right if different elements is done combination in the bonding mode, still an adhesive agent should be arranged between two element.The first water chestnut mirror layer 212 is with after first diffusion substrates 222 combines, the first water chestnut mirror element 21 and first diffused component 22 ' between then form a plurality of clearance A.After the light that light source S penetrates is introduced into first diffused component 22 ' do the adjustment of light type, most of penetrate first diffused component 22 ' light can inject the first water chestnut mirror element 21 again through clearance A earlier, and by structure and refractive index difference between the clearance A and the first water chestnut mirror element 21, light type and light intensity are done the energy distribution in space, make the light scatter that penetrates the first water chestnut mirror element 21 get more even.
Then, please refer to Fig. 4 A, the various different aspects that change of the first water chestnut mirror element 21a, 21b, 21c and the first diffused component 22a are described respectively to shown in Figure 6.
, be other different aspects that change of cross sectional shape of the first water chestnut mirror layer of the first water chestnut mirror element please earlier with reference to shown in Fig. 4 A to Fig. 4 C.In Fig. 4 A, the described first water chestnut mirror La utilizes trapezoidal shape to constitute the first water chestnut mirror layer 212a.In Fig. 4 B, the described first water chestnut mirror Lb utilizes the shape of arc to constitute the first water chestnut mirror layer 212b.In Fig. 4 C, the described first water chestnut mirror Lc then mixes triangle, arc and shape such as trapezoidal constitutes the first water chestnut mirror layer 212c.Wherein, be noted that it is principle that the design of the cross sectional shape of the first water chestnut mirror layer 212a, 212b, 212c is no more than 90 degree with the angle theta of each first water chestnut mirror La, Lb, Lc and first base material 211.
In addition, please refer to Fig. 5 A to Fig. 5 D and be depicted as the first water chestnut mirror element 21d, 21e, 21f, the different schematic perspective views that change aspect of 21g.The described first water chestnut mirror Ld, Le, Lf, the Lg that the first water chestnut mirror layer 212d has can be a sphere, a semisphere (shown in Fig. 5 A), a cylindricality, a taper (shown in Fig. 5 B), a wedge shape (shown in Fig. 5 C) respectively or be constituted (shown in Fig. 5 D) by difformity combination institute.Wherein, be noted that, shape, the size of the described first water chestnut mirror Ld, Le, Lf, Lg, make up and put in order non-limiting, with the dispersion effect that can promote the first water chestnut mirror element 21d, 21e, 21f, 21g for preferentially considering.
Then, please refer to shown in Figure 6ly, is that another of the first diffused component 22a changes aspect.With first diffused component 22 among Fig. 3 ' compare, the diffusion material identical with first diffusion layer 221 of also can mixing of the first diffusion substrates 222a among the first diffused component 22a of this aspect can make light spread more evenly thus.
Second embodiment
Please refer to shown in Fig. 7 A, the luminescence unit 3 of second embodiment of the invention and the difference of first embodiment are: the first water chestnut mirror layer 312 on the first water chestnut mirror element 31 of optical diaphragm group 30 is provided with back to light source S, and also forms a plurality of clearance A between the first water chestnut mirror element 31 and first diffused component 32.
Thus, the light R that the first water chestnut mirror element 31 and first diffused component 32 similarly can make light source S be sent spreads equably, so that the light R that described light source S is sent changes uniform surface light source into by line source.Again, please refer to the optical diaphragm group 30 shown in Fig. 7 B ', the first water chestnut mirror element 31 can be arranged at the opposite side of first diffused component 32, also can produce same effect.
In addition, in the present embodiment, in first diffused component 32 except that first diffusion layer 321, first diffusion substrates 322 also can mix the diffusion material improve dispersion effect.
The 3rd embodiment
Please refer to shown in Figure 8, the luminescence unit 4 of third embodiment of the invention is with the difference of previous embodiment: the first water chestnut mirror element 41 of optical diaphragm group 40 has more one second water chestnut mirror layer, 413, the first base material 411 and is arranged between the first water chestnut mirror layer 412 and the second water chestnut mirror layer 413.Be formed with a plurality of clearance A between the first water chestnut mirror element 41 and first diffused component 42.Be noted that the first water chestnut mirror L1 and the second water chestnut mirror L2 of the first water chestnut mirror layer 412 and the second water chestnut mirror layer 413 can utilize identical or different shape to constitute respectively, are that example explains in this with identical triangle.
Thus, because the first water chestnut mirror element 41 has two water chestnut mirror layers 412,413, therefore the first water chestnut mirror element 41 more can greatly promote for the dispersion effect of light source S emitted light R.
In addition, identical with previous embodiment, the first water chestnut mirror element 41 also can be arranged at the opposite side of first diffused component 42, and first diffusion substrates 422 in first diffused component 42 also can improve dispersion effect by doping and first diffusion layer, 421 diffusion materials.
The 4th embodiment
Please refer to shown in Fig. 9 A, the luminescence unit 5a of fourth embodiment of the invention and the difference of previous embodiment are: the optical diaphragm group 50a of present embodiment more comprises one second water chestnut mirror element 53, be adjacent to the first water chestnut mirror element 51 or first diffused component 52, in present embodiment, the second water chestnut mirror element 53 is that example explains to be adjacent to first diffused component 52, makes to win diffused component 52 between the first water chestnut mirror element 51 and the second water chestnut mirror element 53.Wherein, the second water chestnut mirror element 53 has one second base material 531 and at least one Mitsubishi mirror layer 532.
The material of second base material 531 can be utilized the material identical with first base material 511, for example be PS, PC, MS, PMMA or PET at least one of them.Mitsubishi's mirror layer 532 is also identical with the first water chestnut mirror layer 512, except that can utilize a hot roll extrusion or a hot concora crush mode and second base material 531 integrally formed, also can utilize for example material such as ultraviolet light photopolymerization resin or thermosetting resin, cooperate UV cured mode to be formed on second base material 531 with roll extrusion again.Again, Mitsubishi's mirror layer 532 has a plurality of mirror L3 of Mitsubishi, the cross sectional shape of the described mirror L3 of Mitsubishi is selected from arc, semicircle, fan-shaped, triangle, polygon, irregular shape and group that combination constituted thereof, in present embodiment, the cross sectional shape of the described mirror L3 of Mitsubishi is that example explains with the triangle.Wherein, be noted that the mirror L3 of Mitsubishi can utilize the identical or different shape with the first water chestnut mirror L1, and second base material 531 also can utilize the material identical or different with first base material 511, in present embodiment, is that example explains with identical shape and material.
In addition, please refer to the first water chestnut mirror element 51 that Fig. 9 B and Fig. 9 C be depicted as luminescence unit 5b, 5c, first diffused component 52 and the different permutation and combination method of the second water chestnut mirror element 53.Wherein, Fig. 9 B is example with the second water chestnut mirror element 53 between first diffused component 52 and the first water chestnut mirror element 51; Fig. 9 C is example with the first water chestnut mirror element 51 between first diffused component 52 and the second water chestnut mirror element 53 then.
What deserves to be mentioned is that in this first water chestnut mirror layer 512 and Mitsubishi's mirror layer 532 also can be provided with back to light source S, and the surface of water chestnut mirror layer 512,532 and arbitrary base material applying or when superimposed, a plurality of clearance A all can be formed.Again, the second water chestnut mirror element 53 also can identically with the first water chestnut mirror element 41 have two water chestnut mirror layers that constitute with identical or different shape.In addition, in present embodiment, water chestnut mirror L1, L3 all are that example explains with the triangle.Because the various variation patterns of the structure of the first water chestnut mirror element 51 and the second water chestnut mirror element 53 describe in detail in previous embodiment, repeat no more in this.
Then, please refer to shown in Figure 10, the optical diaphragm group 50d of the luminescence unit 5d of present embodiment more can have one second diffused component 54, it is adjacent to the first water chestnut mirror element 51, first diffused component 52 or the second water chestnut mirror element 53, in present embodiment, second diffused component 54 is that example explains to be adjacent to the second water chestnut mirror element 53.Wherein, second diffused component 54 forms with first diffused component, 52 an identical extrusion or an extrusion extension, printing or the coating methods of utilizing, and it also has one second diffusion layer 541 and one second diffusion substrates 542.
The material of second diffusion substrates 542 can be utilized the material identical with first diffusion substrates 522, for example be PS, PC, MS, PMMA or PET at least one of them.Second diffusion layer 541 has a diffusion material, and the material of diffusion material for example is titania (TiO
2), barium sulphate (BaSO
4) or organic diffusion particle, and second diffusion layer 541 can utilize modes such as printing coating to be arranged on the surface of second diffusion substrates 542.Wherein, be noted that second diffusion layer 541 and first diffusion layer 521 can utilize identical or different material, second diffusion substrates 542 and first diffusion substrates 522 can be utilized identical or different material equally.Again, the structural change of the first water chestnut mirror element 51, first diffused component 52, the second water chestnut mirror element 53 and second diffused component 54 and arrangement mode is non-exceeds with present embodiment can be made different changes according to various variation structure of previous embodiment and arrangement mode.
Please refer to shown in Figure 11, the first water chestnut mirror element 51 and first diffused component 52 of optical diaphragm group 50e can form one first optical element O1, the second water chestnut mirror element 53 and second diffused component 54 can form one second optical element O2, and the first optical element O1 and the second optical element O2 can be superimposed with each other or fit to increase dispersion effect thus.Be superimposed as example and explain so that two first optical element O1 and two second optical element O2 are staggered in this, the arrangement mode of wherein said optical element O1, O2 is non-limiting, and the structure of each optical element O1, O2 can be made change according to the various variation structure of previous embodiment, repeats no more in this.
The 5th embodiment
Please refer to shown in Figure 12, the luminescence unit 6 of fifth embodiment of the invention and the difference of first embodiment are: the optical diaphragm group 60 of present embodiment more comprises one second diffused component 64, it is adjacent to the first water chestnut mirror element 61 or first diffused component 62, and being adjacent to first diffused component 62 in present embodiment with second diffused component 64 is that example explains.Thus, the dispersion effect of optical diaphragm group 60 is increased.
Again, the arrangement mode of the first water chestnut mirror element 61, first diffused component 62 and second diffused component 64 is non-limiting, and three's structure can be made change according to the various variation structure of previous embodiment.
At last, shown in Fig. 2 A, the present invention also discloses a kind of optical diaphragm group 20, be used for a luminescence unit 2, luminescence unit 2 has at least two light source S and sends a light R respectively, light R directly is incident upon optical diaphragm group 20, and described light source S has a plurality of subpoint F1 on the exiting surface F of optical diaphragm group of being projected to 20, and the yield value of each subpoint is less than 1.Optical diaphragm group 20 comprises one first water chestnut mirror element 21 and one first diffused component 22.The first water chestnut mirror element 21 is a thickness less than 0.5 millimeter diaphragm, and has one first base material 211 and at least one first water chestnut mirror layer, 212, the first water chestnut mirror layer 212 are arranged on first base material 211.First diffused component 22 is a thickness less than 0.5 millimeter diaphragm, and is adjacent to the first water chestnut mirror element 21.
The various variation aspects of optical diaphragm group 20, be exposed in optical diaphragm group 30,30 among above-mentioned each embodiment ', 40,50a, 50b, 50c, 50d, 50e, 60, repeat no more in this.
From the above, the light that light source is sent according to a kind of luminescence unit of the present invention and optical diaphragm group thereof directly is incident upon thickness less than 0.5 millimeter the first water chestnut mirror element or first diffused component, the equalizing light rays that light source is sent.Compared with prior art, the light that the present invention utilizes the optical diaphragm group of thinner thickness that light source is sent produces diffusion and homogenising, so not only can reduce material cost, and can reduce light because of passing the energy loss that causes than heavy-gauge sheeting, and and then increase the emitting brightness of luminescence unit.
In addition, for strengthening the scattering function of optical diaphragm group, also can be by structural change, for example each water chestnut mirror diaphragm utilize the diffusion substrates of two water chestnut mirror layers, diffused component mix the diffusion material, change water chestnut mirror shape or increase by one second water chestnut mirror diaphragm and mode such as one second diffusion barrier sheet is reached.Again, by optical diaphragm group of the present invention, the light source of luminescence unit to the distance of optical diaphragm group can make luminescence unit form an area source divided by the spacing of light source less than 0.65 (being D/P＜0.65).Again, each light source is projected to a plurality of subpoints on the exiting surface of optical diaphragm group, and the luminous intensity yield value of the vertical exiting surface of each subpoint is less than 1.Its expression, optical diaphragm group can produce the effect of beam split to light, to increase the non-light intensity of exiting surface when viewing and admiring that be right against of user.And the present invention more can be folded if the mode of fit (Roller to Roller) improves the light diffusion of luminescence unit by a plurality of optical diaphragm group, also can enhance productivity thus, reduces material cost and make the luminescence unit lightweight.
The above only is an illustrative, but not is restricted.Anyly do not break away from spirit of the present invention and category, and, all should be contained in the scope of claims its equivalent modifications of carrying out or change.
Claims (24)
1. an optical diaphragm group is used for a luminescence unit, and this luminescence unit has at least two light sources and sends a light respectively, it is characterized in that this optical diaphragm group comprises:
One first water chestnut mirror element is the diaphragm of thickness less than 0.5 millimeter, and has one first base material and at least one first water chestnut mirror layer, and this first water chestnut mirror layer is arranged on this first base material; And
One first diffused component is the diaphragm of thickness less than 0.5 millimeter, and is adjacent to this first water chestnut mirror element,
Wherein, this light directly is incident upon this first water chestnut mirror element or this first diffused component, and described light source has a plurality of subpoints on the exiting surface that is projected to this optical diaphragm group, and respectively the yield value of this subpoint is less than 1.
2. optical diaphragm group as claimed in claim 1, wherein, this first water chestnut mirror layer and this first base material are integrally formed.
3. optical diaphragm group as claimed in claim 1, wherein, this first water chestnut mirror element has more one second water chestnut mirror layer, and this first base material is arranged between this first water chestnut mirror layer and this second water chestnut mirror layer.
4. optical diaphragm group as claimed in claim 1, wherein, this first water chestnut mirror layer has a plurality of first water chestnut mirrors, has an end face respectively to the described first water chestnut mirror of small part, and to a surface engagement of the described end face of small part and this first diffused component.
5. optical diaphragm group as claimed in claim 1 wherein, forms a plurality of clearances between this first water chestnut mirror element and this first diffused component.
6. optical diaphragm group as claimed in claim 1, wherein, this first water chestnut mirror element is fitted with this first diffused component with a surface of this first base material or is superimposed.
7. optical diaphragm group as claimed in claim 1, wherein, this first diffused component has one first diffusion layer.
8. optical diaphragm group as claimed in claim 1, wherein, this first diffused component has one first diffusion substrates and one first diffusion layer, and this first diffusion layer is arranged at this first diffusion substrates.
9. optical diaphragm group as claimed in claim 1 wherein, more comprises:
One second water chestnut mirror element, and be adjacent to this first water chestnut mirror element or this first diffused component.
10. optical diaphragm group as claimed in claim 9, wherein, this second water chestnut mirror element has one second base material and at least one Mitsubishi mirror layer, and this Mitsubishi's mirror layer is arranged on this second base material.
11. optical diaphragm group as claimed in claim 9 wherein, more comprises:
One second diffused component, and be adjacent to this first water chestnut mirror element, this second water chestnut mirror element or this first diffused component.
12. optical diaphragm group as claimed in claim 1 wherein, more comprises:
One second diffused component, and be adjacent to this first water chestnut mirror element or this first diffused component.
13. a luminescence unit is characterized in that, comprises:
At least two light sources send a light respectively; And
One optical diaphragm group, be adjacent to described light source, described light directly is incident upon this optical diaphragm group, and described light source has a plurality of subpoints on the exiting surface that is projected to this optical diaphragm group, respectively the yield value of this subpoint is less than 1, and this optical diaphragm group comprises:
One first water chestnut mirror element is the diaphragm of thickness less than 0.5 millimeter, and has one first base material and at least one first water chestnut mirror layer, and this first water chestnut mirror layer is arranged on this first base material, and
One first diffused component is the diaphragm of thickness less than 0.5 millimeter, and is adjacent to this first water chestnut mirror element.
14. luminescence unit as claimed in claim 13, wherein, this first water chestnut mirror layer and this first base material are integrally formed.
15. luminescence unit as claimed in claim 13, wherein, this first water chestnut mirror element has more one second water chestnut mirror layer, and this first base material is arranged between this first water chestnut mirror layer and this second water chestnut mirror layer.
16. luminescence unit as claimed in claim 13, wherein, this first water chestnut mirror layer has a plurality of first water chestnut mirrors, has an end face respectively to the described first water chestnut mirror of small part, and to a surface engagement of the described end face of small part and this first diffused component.
17. luminescence unit as claimed in claim 13 wherein, forms a plurality of clearances between this first water chestnut mirror element and this first diffused component.
18. luminescence unit as claimed in claim 13, wherein, this first water chestnut mirror element is fitted with this first diffused component with a surface of this first base material or is superimposed.
19. luminescence unit as claimed in claim 13, wherein, this first diffused component has one first diffusion layer.
20. luminescence unit as claimed in claim 13, wherein, this first diffused component has one first diffusion substrates and one first diffusion layer, and this first diffusion layer is arranged at this first diffusion substrates.
21. luminescence unit as claimed in claim 13 wherein, more comprises:
One second water chestnut mirror element, and be adjacent to this first water chestnut mirror element or this first diffused component.
22. luminescence unit as claimed in claim 21, wherein, this second water chestnut mirror element has one second base material and at least one Mitsubishi mirror layer, and this Mitsubishi's mirror layer is arranged on this second base material.
23. luminescence unit as claimed in claim 21 wherein, more comprises:
One second diffused component, and be adjacent to this first water chestnut mirror element, this second water chestnut mirror element or this first diffused component.
24. luminescence unit as claimed in claim 13 wherein, more comprises:
One second diffused component, and be adjacent to this first water chestnut mirror element or this first diffused component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101599405A CN101464591A (en) | 2007-12-20 | 2007-12-20 | Illumination unit and its optical film group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101599405A CN101464591A (en) | 2007-12-20 | 2007-12-20 | Illumination unit and its optical film group |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101464591A true CN101464591A (en) | 2009-06-24 |
Family
ID=40805248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101599405A Pending CN101464591A (en) | 2007-12-20 | 2007-12-20 | Illumination unit and its optical film group |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101464591A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109188771A (en) * | 2018-10-15 | 2019-01-11 | 厦门天马微电子有限公司 | A kind of backlight module and display panel |
| CN111290061A (en) * | 2020-04-28 | 2020-06-16 | 深圳市汇顶科技股份有限公司 | Optical diffusion sheet, light source device, and distance measuring device |
| WO2021217406A1 (en) * | 2020-04-28 | 2021-11-04 | 深圳市汇顶科技股份有限公司 | Optical diffusion sheet, light source apparatus, and distance measurement apparatus |
-
2007
- 2007-12-20 CN CNA2007101599405A patent/CN101464591A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109188771A (en) * | 2018-10-15 | 2019-01-11 | 厦门天马微电子有限公司 | A kind of backlight module and display panel |
| CN111290061A (en) * | 2020-04-28 | 2020-06-16 | 深圳市汇顶科技股份有限公司 | Optical diffusion sheet, light source device, and distance measuring device |
| WO2021217406A1 (en) * | 2020-04-28 | 2021-11-04 | 深圳市汇顶科技股份有限公司 | Optical diffusion sheet, light source apparatus, and distance measurement apparatus |
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Open date: 20090624 |