CN102364239A - Optical film and backlight module using same - Google Patents
Optical film and backlight module using same Download PDFInfo
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- CN102364239A CN102364239A CN2011103647946A CN201110364794A CN102364239A CN 102364239 A CN102364239 A CN 102364239A CN 2011103647946 A CN2011103647946 A CN 2011103647946A CN 201110364794 A CN201110364794 A CN 201110364794A CN 102364239 A CN102364239 A CN 102364239A
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- 239000012788 optical film Substances 0.000 title abstract 6
- 238000009792 diffusion process Methods 0.000 claims abstract description 136
- 239000000758 substrate Substances 0.000 claims abstract description 102
- 238000005452 bending Methods 0.000 claims abstract 2
- 230000001186 cumulative effect Effects 0.000 claims description 14
- 230000000694 effects Effects 0.000 abstract description 17
- 238000007790 scraping Methods 0.000 abstract description 4
- 230000007423 decrease Effects 0.000 abstract description 3
- 208000027418 Wounds and injury Diseases 0.000 abstract 1
- 238000000889 atomisation Methods 0.000 abstract 1
- 230000006378 damage Effects 0.000 abstract 1
- 208000014674 injury Diseases 0.000 abstract 1
- 230000006870 function Effects 0.000 description 10
- 230000000007 visual effect Effects 0.000 description 6
- 238000007598 dipping method Methods 0.000 description 5
- 238000003306 harvesting Methods 0.000 description 5
- 241000191291 Abies alba Species 0.000 description 4
- 240000001439 Opuntia Species 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- 239000003595 mist Substances 0.000 description 4
- 239000012141 concentrate Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 2
- 238000010023 transfer printing Methods 0.000 description 2
- 238000005422 blasting Methods 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000002650 habitual effect Effects 0.000 description 1
- 238000010147 laser engraving Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0053—Prismatic sheet or layer; Brightness enhancement element, sheet or layer
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
- G02B5/0231—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures the surface having microprismatic or micropyramidal shape
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/04—Prisms
- G02B5/045—Prism arrays
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
- Led Device Packages (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
An optical film and a backlight module using the same are provided, wherein the optical film comprises a substrate and a plurality of first prism structures. The substrate is provided with a first side and a second side which are opposite. The first prism structures are arranged on the substrate and are arranged from the first side to the second side. Each first prism structure has a curved peak. The bending peaks have a degree of fluctuation. The degree of undulation of the first prism structure decreases from the first side toward the second side. The optical film provided by the invention can keep the original brightness of the central brightness of the whole backlight module under the condition of not influencing the brightness, and can achieve the obvious atomization effect on the hot spot phenomenon generated by the light emitting diode. The backlight module provided by the invention does not need to use an upper diffusion sheet, can avoid the problem of scraping injury between optical films, and can reduce the assembly time of the optical films and the overall thickness of the backlight module.
Description
Technical field
The present invention relates to a kind of blooming piece, particularly a kind of blooming piece that is applied to backlight module.
Background technology
Backlight module is one of key part and component of LCD.Because liquid crystal panel itself is the luminous ability of tool not, the function of backlight module promptly is well-off brightness and the light source that is evenly distributed, and makes normally display image of LCD.LCD has been widely used in the electronic product of tool growth potentiality such as monitor, notebook computer, digital camera and projector at present, and the demand that therefore drives backlight module and relevant spare part thereof continues to grow up.In general, the LCD of the purposes of display frame is provided, its backlight module can comprise diffusion sheet, brightness enhancement film (BEF) usually, go up diffusion sheet and light emitting source.At present, the trend of LCD is driven gesture and traditional cold-cathode tube (CCFL) light source is replaced as light emitting diode (LED) light source than power saving mostly.
Yet; Light emitting diode is a spot light; Be not to be line source, so arrangement spaced reciprocally can cause light source to disperse uneven problem between the light emitting diode, and this also is to cause light emitting diode to produce the main cause of focus (Hot Spot) phenomenon like traditional cold-cathode tube.In addition, in order to improve briliancy, backlight module regular meeting horizontal positioned brightness enhancement film, but brightness enhancement film has the effect of splitting picture (image splitting) again, therefore also indirectly hot spot phenomenon is become more serious.Moreover; Under the trend that reduces cost with material sorting; Backlight module regular meeting is integrated into a composite membrane to last diffusion sheet and brightness enhancement film; Therefore also cause the atomizing effect variation indirectly, equally also make the problem of hot spot phenomenon gradually serious, also cause the user can observe the phenomenon of bright dark inequality easily.Though LCD can enlarge the glue frame in order to cover focus, but this practice can cause the viewing area to diminish, or the size of panel module becomes big.
Summary of the invention
For solving the problem of known technology; One embodiment of the invention are a kind of blooming pieces; It mainly is the face mist degree distribution situation through the control blooming piece; And then the center briliancy of adjustment blooming piece and the mist degree at focus edge, make blooming piece can have the function of diffusion and light harvesting effect simultaneously concurrently.Therefore, blooming piece proposed by the invention can make the center brightness of whole backlight module can keep original due briliancy under the situation that does not influence briliancy, and can reach significant atomizing effect again for the hot spot phenomenon that light emitting diode produced simultaneously.
According to one embodiment of the invention, a kind of blooming piece comprises substrate and a plurality of first prism structure.Substrate has two relative first side and second sides.First prism structure is arranged in the substrate, and is arranged towards second side by first side.Each first prism structure has crooked crest.Crooked crest has degree of fluctuation.The degree of fluctuation of first prism structure by first side towards second side decrescence.
In one embodiment of the invention, the crooked crest of above-mentioned each has two-end-point.The end points definition average line of each crooked crest.The average line that each crooked crest is corresponding relatively forms a plurality of ripples.The ripple of each crooked crest has mean wavelength.Each degree of fluctuation reduces with the mean wavelength increase of correspondence.
In one embodiment of the invention, the central authorities of above-mentioned substrate have center line.Center line is between first side and second side.Be positioned at the mean wavelength of first prism structure of first side, be substantially first prism structure that is positioned at center line mean wavelength 10%～50%.
In one embodiment of the invention, the ripple of the crooked crest of above-mentioned each has mean amplitude of tide.Each degree of fluctuation increases with the mean amplitude of tide of correspondence.
In one embodiment of the invention, above-mentioned each first prism structure has the average vertical height.Mean amplitude of tide is less than 20% of the average vertical height.
In one embodiment of the invention, above-mentioned each first prism structure has the average level width.Mean amplitude of tide is less than 20% of the average level width.
In one embodiment of the invention, be positioned at the mean amplitude of tide of first prism structure of center line, be substantially first prism structure that is positioned at first side mean amplitude of tide 10%～50%.
In one embodiment of the invention, the first above-mentioned prism structure is between first side and center line.
In one embodiment of the invention, the degree of fluctuation of the first above-mentioned prism structure respectively by first side and second side towards center line decrescence.
In one embodiment of the invention, above-mentioned blooming piece further comprises a plurality of second prism structures.Second prism structure is arranged in the substrate.Each second prism structure has straight crest.Each second prism structure is between wantonly two adjacent first prism structures.And the quantity of second prism structure between wantonly two adjacent first prism structures is by second side towards first side decrescence.
In one embodiment of the invention, the second above-mentioned prism structure is between second side and center line.
In one embodiment of the invention, the quantity of the second above-mentioned prism structure between wantonly two adjacent first prism structures is cumulative towards center line by first side and second side respectively.
According to another embodiment of the present invention, a kind of blooming piece comprises substrate, a plurality of first prism structure and a plurality of little diffusion structure.Substrate has two relative first side and second sides.First prism structure is arranged in the substrate, and is arranged towards second side by first side.Little diffusion structure is arranged on the surface of first prism structure, causes each first prism structure to have the light diffusion.The light diffusion of first prism structure by first side towards second side decrescence.
In one embodiment of the invention, the little diffusion structure on the first above-mentioned prism structure has average projecting height.Each light diffusion reduces with the average projecting height of correspondence.
In one embodiment of the invention, the first above-mentioned prism structure has vertical height.Average projecting height is less than 80% of vertical height.
In one embodiment of the invention, be positioned at the average projecting height of little diffusion structure of first prism structure of first side, be substantially first prism structure that is positioned at center line little diffusion structure average projecting height 10%～50%.
In one embodiment of the invention, the little diffusion structure on above-mentioned each first prism structure has averag density.Averag density is the quantity of little diffusion structure included on the unit are.Each light diffusion reduces with the averag density of correspondence.
In one embodiment of the invention, be positioned at the averag density of the little diffusion structure on first prism structure of first side, be substantially the little diffusion structure on first prism structure that is positioned at center line averag density 10%～50%.
In one embodiment of the invention, the light diffusion of the first above-mentioned prism structure respectively by first side and second side towards center line decrescence.
In one embodiment of the invention, above-mentioned blooming piece further comprises a plurality of second prism structures.Second prism structure is arranged in the substrate.Each second prism structure has smooth surface.Each second prism structure is between wantonly two adjacent first prism structures.And the quantity of second prism structure between wantonly two adjacent first prism structures is by second side towards first side decrescence.
In one embodiment of the invention, above-mentioned little diffusion structure is ball-shaped or multiangular.
Another embodiment of the present invention is a kind of backlight module, and it mainly is through adopting the present invention can have the blooming piece of diffusion and light harvesting function simultaneously concurrently, and then can save and extraly add the conventional practice of diffusion sheet on one and reach the purpose that reduces cost.In other words; Backlight module proposed by the invention need not use diffusion sheet; So the backlight module that adopts traditional multi-layer optical membrane framework can reduce the quantity of piling up of blooming piece; Except avoiding producing the scratch problem of scraping between the blooming piece, also can reduce the built-up time of blooming piece and the integral thickness of backlight module.
According to another embodiment of the present invention, a kind of backlight module comprises LGP, a plurality of first light emitting diode, diffusion sheet and blooming piece.LGP has first incidence surface and exiting surface.First incidence surface is connected with exiting surface.First light emitting diode is arranged along first incidence surface.Diffusion sheet is arranged on the exiting surface.Blooming piece comprises substrate and a plurality of first prism structure.Substrate is arranged on the diffusion sheet.First prism structure is arranged in the substrate, and extends along the orientation of first light emitting diode.The diffusion of first prism structure in the zone of contiguous light emitting diode can be greater than the zone away from light emitting diode
In one embodiment of the invention, one of them of the first above-mentioned prism structure has curvilinear corner angle staff, to form different diffusions.
In one embodiment of the invention, one of them of the first above-mentioned prism structure has a plurality of little diffusion structures, to form different diffusions.
Description of drawings
Fig. 1 is the side view that illustrates according to the backlight module of one embodiment of the invention.
Fig. 2 is the stereogram that the blooming piece among Fig. 1 is shown.
Fig. 3 A is the vertical view that blooming piece one first prism structure wherein among Fig. 2 is shown.
Fig. 3 B is the stereogram that first prism structure among Fig. 3 A is shown, and wherein first prism structure is the form that deflects.
Fig. 3 C is the stereogram that another embodiment of first prism structure among Fig. 3 A is shown, and wherein first prism structure is the form of dipping and heaving.
Fig. 4 A is the vertical view that the blooming piece among Fig. 2 is shown.
Fig. 4 B is the vertical view that another embodiment of the blooming piece among Fig. 4 A is shown.
Fig. 4 C is the vertical view that another embodiment of the blooming piece among Fig. 4 A is shown.
Fig. 5 is the side view that illustrates according to the backlight module of another embodiment of the present invention.
Fig. 6 A is the vertical view that the blooming piece among Fig. 5 is shown.
Fig. 6 B is the vertical view that another embodiment of the blooming piece among Fig. 6 A is shown.
Fig. 7 is the side view that another embodiment of blooming piece one first prism structure wherein among Fig. 1 is shown.
Fig. 8 A is the vertical view that an embodiment of the blooming piece among Fig. 2 is shown, and it is first prism structure that adopts among Fig. 7.
Fig. 8 B is the vertical view that another embodiment of the blooming piece among Fig. 8 A is shown.
Fig. 8 C is the vertical view that another embodiment of the blooming piece among Fig. 8 A is shown.
Fig. 8 D is the vertical view that another embodiment of the blooming piece among Fig. 8 A is shown.
Fig. 8 E is the vertical view that another embodiment of the blooming piece among Fig. 8 A is shown.
Fig. 9 A is the vertical view that another embodiment of the blooming piece among Fig. 8 A is shown.
Fig. 9 B is the vertical view that another embodiment of the blooming piece among Fig. 9 A is shown.
Fig. 9 C is the vertical view that another embodiment of the blooming piece among Fig. 9 A is shown.
Fig. 9 D is the vertical view that another embodiment of the blooming piece among Fig. 9 A is shown.
Fig. 9 E is the vertical view that another embodiment of the blooming piece among Fig. 9 A is shown.
[main description of reference numerals]
1,3: backlight module 10: LGP
100a: the first incidence surface 100b: exiting surface
100c: second incidence surface 102: Christmas tree pattern
16a, 16b, 16c, 16d, 16e: blooming piece
160: substrate 160a: first side
160b: 162: the first prism structures of second side
162a: 164: the second prism structures of crooked crest
164a: 18: the second light emitting diodes of straight crest
36a, 36b, 36c, 36d, 36e: blooming piece
362,562: the first prism structure 362a, 562a: little diffusion structure
56a, 56b, 56c, 56d, 56e: blooming piece
A: amplitude C: center line
H: horizontal width L: average line
P: end points S: projecting height
V1: vertical height V2: vertical height
W: wavelength
The specific embodiment
Below will disclose a plurality of embodiment of the present invention with accompanying drawing, for the purpose of offering some clarification on, the details on many practices will explanation in the lump in following narration.Yet, should be appreciated that the details on these practices is not used with restriction the present invention.That is to say that in part embodiment of the present invention, the details on these practices is inessential.In addition, for the purpose of simplifying accompanying drawing, some known habitual structures and element will illustrate with the mode of simple signal in the accompanying drawings.
One embodiment of the invention are a kind of backlight modules.More particularly, it mainly is through adopting the present invention can have the blooming piece of diffusion and light harvesting function simultaneously concurrently, and then can save and extraly add the conventional practice of diffusion sheet on one and reach the purpose that reduces cost.In other words; Backlight module proposed by the invention need not use diffusion sheet; So the backlight module that adopts traditional multi-layer optical membrane framework can reduce the quantity of piling up of blooming piece; Except avoiding producing the scratch problem of scraping between the blooming piece, also can reduce the built-up time of blooming piece and the integral thickness of backlight module.
Please with reference to Fig. 1.Fig. 1 is the side view that illustrates according to the backlight module 1 of one embodiment of the invention.
As shown in Figure 1, in present embodiment, backlight module 1 comprises LGP 10, a plurality of first light emitting diode 12, diffusion sheet 14 and blooming piece 16a.The LGP 10 of backlight module 1 has the first incidence surface 100a and exiting surface 100b.The first incidence surface 100a of LGP 10 is connected with exiting surface 100b.First light emitting diode 12 of backlight module 1 is flatly arranged along the first incidence surface 100a of LGP 10.Because Fig. 1 is the side view of backlight module 1 of the present invention, therefore one first light emitting diode 12 only is shown.The diffusion sheet 14 of backlight module 1 is arranged on the exiting surface 100b of LGP 10.The blooming piece 16a of backlight module 1 is arranged on the diffusion sheet 14.In other words, the diffusion sheet 14 of backlight module 1 is from bottom to top arranged the exiting surface 100b top that is stacked in LGP 10 in regular turn with blooming piece 16a.In addition, LGP 10 bottoms of backlight module 1 also are provided with Christmas tree pattern 102.Whereby; After the light that first light emitting diode 12 of backlight module 1 is launched gets into LGP 10 through the first incidence surface 100a; Light can be positioned at Christmas tree pattern 102 reflections of LGP 10 bottoms immediately and leave LGP 10 through exiting surface 100b, and leaves backlight module 1 through diffusion sheet 14 with blooming piece 16a in regular turn.
Please with reference to Fig. 2.Fig. 2 is the stereogram that the blooming piece 16a among Fig. 1 is shown.
As shown in Figure 2, in present embodiment, the blooming piece 16a of backlight module 1 comprises substrate 160 and a plurality of first prism structure 162.The substrate 160 of blooming piece 16a is arranged on the diffusion sheet 14 of backlight module 1, and has the two relative first side 160a and second side 160b.First side 160a of substrate 160 and the first incidence surface 100a of LGP 10 are positioned at the same side, and contiguous first light emitting diode 12.First prism structure 162 of blooming piece 16a is arranged in the substrate 160.First prism structure 162 of blooming piece 16a extends along the orientation of first light emitting diode 12, and is arranged towards the second side 160b by the first side 160a of substrate 160.The diffusion of first prism structure 162 in the zone of contiguous light emitting diode 12 can be greater than the diffusion away from first prism structure 162 in the zone of light emitting diode 12.In present embodiment; Each first prism structure 162 has crooked crest 162a, and in present embodiment, each first prism structure 162 has curvilinear corner angle staff; And corner angle staff forms crooked crest 162a; In other words, crooked crest 162a is the curve with different curvature, non-specific crest and the wave trough position that means to point-like.The crooked crest 162a of first prism structure 162 has degree of fluctuation.In order to the means of the diffusion of adjusting first prism structure 162, can reach in the present embodiment through the degree of fluctuation that changes crooked crest 162a.The degree of fluctuation of first prism structure 162 is past away from the first incidence surface 100a decrescence by the first incidence surface 100a of contiguous LGP 10, that is the degree of fluctuation of first prism structure 162 of contiguous light emitting diode 12 can be greater than other zones.
Please with reference to Fig. 3 A, Fig. 3 B and Fig. 3 C.Fig. 3 A is the vertical view that blooming piece 16a one first prism structure 162 wherein among Fig. 2 is shown.Fig. 3 B is the stereogram that first prism structure 162 among Fig. 3 A is shown, wherein the form of first prism structure 162 for deflecting.Fig. 3 C is the stereogram that another embodiment of first prism structure 162 among Fig. 3 A is shown, and wherein first prism structure 162 is the form of dipping and heaving.
Shown in Fig. 3 A and Fig. 3 B, in present embodiment, the crooked crest 162a of each first prism structure 162 all has two-end-point P.The line of the two-end-point P of each crooked crest 162a may be defined as average line L.The crooked crest 162a of each first prism structure 162 average line L relatively separately can form a plurality of ripples.
By on the one hand, in the formed a plurality of ripples of each crooked crest 162a, each ripple has specific wavelength W, and after a plurality of specific wavelength W of same crooked crest 162a are obtained mean value, then is the mean wavelength Wm of crooked crest 162a.In other words, mean wavelength Wm can average through the wavelength of crooked crest 162a being gone up all ripples and obtain.The degree of fluctuation of each first prism structure 162 reduces with mean wavelength Wm increase separately.(annotate: Fig. 3 A is the vertical view of single first prism structure 162; Non-three crooked crests) in other words; If the ripple of crooked crest 162a has short mean wavelength Wm; More except the quantity of representing the ripple on the crooked crest 162a, also represent first prism structure 162 to have the bigger flexural oscillations trend of frequency.Because first light emitting diode 12 is over against the first incidence surface 100a of LGP 10, therefore focus (Hot spot) phenomenon that caused of first light emitting diode 12 can betide the first incidence surface 100a part of contiguous LGP 10.The first incidence surface 100a through making the most contiguous LGP 10 (that is; The first side 160a of substrate 160) first prism structure 162 has the shortest mean wavelength Wm; And the mean wavelength Wm that makes first prism structure 162 by the first incidence surface 100a of contiguous LGP 10 toward away from the first incidence surface 100a (that is; The second side 160b of substrate 160) cumulative; Except the hot spot phenomenon that can be effectively be caused first light emitting diode 12 produces atomizing effect and not obvious, also can make the light that penetrates by blooming piece 16a have continuous taste (that is, briliancy and colourity).In other words; First prism structure 162 that utilization has higher degree of fluctuation can atomize near the hot spot phenomenon of the side of going into the first light face 100a; First prism structure 162 of the degree of fluctuation through having graded can make briliancy and colourity that having of whole exiting surface 100b is continuous change simultaneously.
By on the other hand, in the formed a plurality of ripples of each crooked crest 162a, each ripple has particular amplitude A, and after a plurality of particular amplitude A of same crooked crest 162a are obtained mean value, then is the mean amplitude of tide Am of crooked crest 162a.In other words, mean amplitude of tide Am can obtain through last all wave amplitudes of crooked crest 162a are averaged.The degree of fluctuation of each first prism structure 162 increases with mean amplitude of tide Am separately.In other words, if the ripple of crooked crest 162a has bigger mean amplitude of tide Am,, also represent first prism structure 162 to have the flexural oscillations trend of big rise and fall except the total length of representing crooked crest 162a is longer.First prism structure 162 of the first incidence surface 100a through making the most contiguous LGP 10 has maximum mean amplitude of tide Am; And make the mean amplitude of tide Am of first prism structure 162 past decrescence away from the first incidence surface 100a by the first incidence surface 100a of contiguous LGP 10; Equally produce atomizing effect and not obvious, also can make the light that penetrates by blooming piece 16a have continuous taste except the hot spot phenomenon that can be caused first light emitting diode 12 effectively.
Shown in Fig. 3 A and Fig. 3 B, each first prism structure 162 of blooming piece 16a can have average vertical height V1m and average level width Hm.Further specify; If the form of first prism structure 162 of blooming piece 16a for deflecting; Then first prism structure 162 has a plurality of not wide triangular-sections; The horizontal width H of same first prism structure 162 each triangular-section is averaged, and then is the average level width Hm of first prism structure 162.In other words, average level width Hm is the mean value of the horizontal width of first prism structure, 162 relative substrates 160.
Shown in Fig. 3 C; If first prism structure 162 of blooming piece 16a is the form of dipping and heaving; Then first prism structure 162 has a plurality of high triangular-sections of not waiting; The vertical height V1 of same first prism structure 162 each triangular-section is averaged, and then is the average vertical height V1m of first prism structure 162.In other words, average vertical height V1m is the mean value of the vertical height of first prism structure, 162 relative substrates 160.
In present embodiment; First prism structure 162 on the blooming piece 16a causes the taste of the light that blooming piece 16a penetrates not good owing to degree of fluctuation is excessive; And can cause briliancy to descend; The mean amplitude of tide Am of each first prism structure 162 can be less than 20% of 20% or the average level width Hm of average vertical height V1m, and then simultaneously focus is reached the effect of atomizing, and the light that blooming piece 16a is penetrated has preferable taste.In present embodiment, first prism structure 162 of blooming piece 16a only be not limited to can dipping and heaving (shown in Fig. 3 A and Fig. 3 B) or about skew (shown in Fig. 3 C), also can at random swing up and down.In above-mentioned different embodiment; Utilize first prism structure 162 can have dipping and heaving, swing and cause different degree of fluctuation; In other words; Specific wavelength W (or mean wavelength Wm), particular amplitude A (or mean amplitude of tide Am), vertical height V (or the high Vm of average vertical) or the horizontal width H (or average level width Hm) of crooked crest 162a through changing first prism structure 162; Make first prism structure 162 have the corner angle staff of different curvature, and form different degree of fluctuation, to change the diffusion of first prism structure 162.
Please with reference to Fig. 4 A.Fig. 4 A is the vertical view that the blooming piece 16a among Fig. 2 is shown.
Shown in Fig. 4 A, substrate 160 central authorities of blooming piece 16a have center line C, and the center line C of substrate 160 is between the first side 160a and the second side 160b.In present embodiment, center line C is positioned in the middle of the first side 160a and the second side 160b, and substrate 160 is divided into two fifty-fifty.Be positioned at the mean wavelength Wm of first prism structure 162 of substrate 160 first side 160a; Be substantially first prism structure 162 that is positioned at substrate 160 center line C mean wavelength Wm 10%～50%, that is be positioned at the mean wavelength Wm of first prism structure 162 of the first side 160a can be greater than the mean wavelength Wm of first prism structure 162 that is positioned at center line C.Present embodiment only with Centromedian center line C between the first side 160a and the second side 160b as the line of demarcation, but not as limit, can adjust marginal position according to demand.For example, center line C can be positioned at the center of viewing area, and wherein the viewing area is the zone that has the demonstration effect in the display floater.In present embodiment; Because the degree of fluctuation of first prism structure 162 comparatively relaxes away from first incidence surface 100a gradient decrescence by the first incidence surface 100a of contiguous LGP 10 is past; Therefore the user can feel that observing the light time of being penetrated by blooming piece 16a light has more level and smooth taste.
On the other hand; For the degree of fluctuation that makes first prism structure 162 comparatively relaxes away from first incidence surface 100a gradient decrescence by the first incidence surface 100a of contiguous LGP 10 is past; And let the user observe the light time of penetrating by blooming piece 16a; Sensation light has more level and smooth taste; In an embodiment, also can make the mean amplitude of tide Am of first prism structure 162 that is positioned at substrate 160 first side 160a, be substantially first prism structure 162 that is positioned at substrate 160 center line C mean amplitude of tide Am 10%～50%.
Please with reference to Fig. 4 B.Fig. 4 B is the vertical view that another embodiment of the blooming piece 16a among Fig. 4 A is shown.
Shown in Fig. 4 B; In present embodiment; If toward the taste influence of the light that penetrates for blooming piece 16b away from first incidence surface 100a gradient decrescence significantly the time, first prism structure 162 of blooming piece 16b also can concentrate between the first side 160a and center line C of substrate 160 by the first incidence surface 100a of contiguous LGP 10 for the degree of fluctuation of first prism structure 162.Whereby, have the blooming piece 16b of less first prism structure, 162 quantity, on making, have the advantage of easy processing, and the fine ratio of product of blooming piece 16b also can obtain to promote.
Shown in Fig. 4 A and Fig. 4 B, blooming piece 16a and blooming piece 16b also comprise a plurality of second prism structures 164 except the substrate 160 and first prism structure 162.Second prism structure 164 is arranged in the substrate 160.Each second prism structure 164 has straight crest 164a.Because the straight crest 164a of second prism structure 164 does not have the function of the hot spot phenomenon that atomizing first light emitting diode 12 caused, therefore second prism structure 164 can be arranged towards the first side 160a of contiguous first light emitting diode 12 by the second side 160b of substrate 160 away from first light emitting diode 12.In present embodiment, the first side 160a and the second side 160b of the parallel substrate 160 of straight crest 164a of each second prism structure 164, but not as limit.In another embodiment, the straight crest 164a of each second prism structure 164 also can be parallel to each other, but not parallel with the second side 160b with the first side 160a of substrate 160.
Please with reference to Fig. 4 C.Fig. 4 C is the vertical view that another embodiment of the blooming piece 16a among Fig. 4 A is shown.
Shown in Fig. 4 C; In present embodiment; Each second prism structure 164 is between wantonly two adjacent first prism structures 162, and the quantity of second prism structure 164 between wantonly two adjacent first prism structures 162, is by the second side 160b of substrate 160 towards the first side 160a decrescence.The blooming piece 16c of present embodiment; Be through making the quantity between wantonly two adjacent first prism structures 162 cumulative towards the second side 160b by the first side 160a of substrate 160; As making the light that is penetrated by blooming piece 16c have the means of more level and smooth taste, it is past away from the first incidence surface 100a practice decrescence by the first incidence surface 100a of contiguous LGP 10 that its visual effect that can reach is similar to the degree of fluctuation that makes first prism structure 162.
Please with reference to Fig. 5.Fig. 5 is the side view that illustrates according to the backlight module 3 of another embodiment of the present invention.
As shown in Figure 5, in present embodiment, backlight module 3 also comprises a plurality of second light emitting diodes 18 except comprising LGP 10, a plurality of first light emitting diode 12, diffusion sheet 14 and blooming piece 16d equally.In addition, the LGP 10 of backlight module 3 also comprises the second incidence surface 100c except having the first incidence surface 100a and exiting surface 100b.The first incidence surface 100a and the second incidence surface 100c of LGP 10 are connected with exiting surface 100b respectively.First light emitting diode 12 of backlight module 3 is flatly arranged along the first incidence surface 100a of LGP 10, and second light emitting diode 18 is flatly arranged along the second incidence surface 100c of LGP 10.Because Fig. 5 is the side view of backlight module 3 of the present invention, therefore one first light emitting diode 12 and one second light emitting diode 18 only are shown.Whereby; After the light that first light emitting diode 12 and second light emitting diode 18 of backlight module 3 are launched gets into LGP 10 through the first incidence surface 100a and the second incidence surface 100c respectively; Light can be positioned at Christmas tree pattern 102 reflections of LGP 10 bottoms immediately and leave LGP 10 through exiting surface 100b, and leaves backlight module 3 through diffusion sheet 14 with blooming piece 16d in regular turn.
Please with reference to Fig. 6 A.Fig. 6 A is the vertical view that the blooming piece 16d among Fig. 5 is shown.
Shown in Fig. 6 A; In present embodiment; Because first light emitting diode 12 is over against the first incidence surface 100a of LGP 10; And second light emitting diode 18 is over against the second incidence surface 100c of LGP 10, and therefore the hot spot phenomenon that caused of first light emitting diode 12 and second light emitting diode 18 can betide the first incidence surface 100a and the second incidence surface 100c part of contiguous LGP 10 respectively.The first incidence surface 100a through making the most contiguous LGP 10 (that is; The first side 160a of substrate 160) with the second incidence surface 100c (that is; The second side 160b of substrate 160) first prism structure 162 has maximum degree of fluctuation (can make first prism structure 162 have the shortest mean wavelength Wm or maximum mean amplitude of tide Am); And make the degree of fluctuation of first prism structure 162 cumulative by the first incidence surface 100a and the second incidence surface 100c of contiguous LGP 10 respectively towards the center line C of substrate 160; Except the hot spot phenomenon that can be effectively first light emitting diode 12 and second light emitting diode 18 be caused produces atomizing effect and not obvious, also can make the light that penetrates by blooming piece 16d have continuous taste.
Please with reference to Fig. 6 B.Fig. 6 B is the vertical view that another embodiment of the blooming piece 16d among Fig. 6 A is shown.
Shown in Fig. 6 B; In present embodiment; Each second prism structure 164 is between wantonly two adjacent first prism structures 162; And the quantity of second prism structure 164 between wantonly two adjacent first prism structures 162 is cumulative towards center line C by the first side 160a and the second side 160b of substrate 160 respectively.The blooming piece 16e of present embodiment; Be through making the quantity between wantonly two adjacent first prism structures 162 cumulative by the first side 160a and the second side 160b of substrate 160 respectively towards center line C; As making the light that penetrates by blooming piece 16e have the means of more level and smooth taste, its visual effect that can reach be similar to make first prism structure 162 degree of fluctuation respectively by the first incidence surface 100a that is close to LGP 10 and the second incidence surface 100c towards the center line C of substrate 160 practice decrescence.
Please with reference to Fig. 7 and Fig. 8 A.Fig. 7 is the side view that another embodiment of blooming piece 16a one first prism structure 162 wherein among Fig. 1 is shown.Fig. 8 A is the vertical view that the embodiment of the blooming piece 16a among Fig. 2 is shown, and it adopts first prism structure 362 among Fig. 7.
Shown in Fig. 7 and Fig. 8 A, present embodiment is to improve to the blooming piece 16a among Fig. 1, particularly is directed against first prism structure 162 of blooming piece 16a.In present embodiment, blooming piece 36a comprises substrate 160 equally.First prism structure 362 of blooming piece 36a extends along the orientation of first light emitting diode 12, and is arranged towards the second side 160b by the first side 160a of substrate 160.The diffusion of first prism structure 362 in the zone of contiguous light emitting diode 12 can be greater than the diffusion away from first prism structure 362 in the zone of light emitting diode 12.In present embodiment, blooming piece 36a comprises a plurality of little diffusion structure 362a.Little diffusion structure 362a of blooming piece 36a is arranged on the surface of first prism structure 362, causes each first prism structure 362 to have the light diffusion.In order to the means of the diffusion of adjusting first prism structure 362, can reach in the present embodiment through the light diffusion that changes first prism structure 362.The light diffusion of first prism structure 362 by the first side 160a towards the second side 160b decrescence (that is, by the first incidence surface 100a of contiguous LGP 10 toward decrescence) away from the first incidence surface 100a.
As shown in Figure 7, in present embodiment, each little diffusion structure 362a has projecting height S.Projecting height S may be defined as the surface vertical height farthest of each little diffusion structure 362a distance first prism structure 362.Among first prism structure, 362 formed a plurality of little diffusion structure 362a; Each little diffusion structure 362a has specific projecting height S; And after the specific projecting height S of a plurality of little diffusion structure 362a on same first prism structure 362 obtained mean value, then be the average projecting height Sm of the little diffusion structure 362a on this first prism structure 362.In other words, the light diffusion of each first prism structure 362 reduces with the average projecting height Sm of separately little diffusion structure 362a.In other words, if the little diffusion structure 362a on first prism structure 362 has bigger average projecting height Sm,, also represent first prism structure 362 to have bigger light diffusivity except the size of representing little diffusion structure 362a is bigger.Because first light emitting diode 12 is over against the first incidence surface 100a of LGP 10, therefore the hot spot phenomenon that caused of first light emitting diode 12 can betide the first incidence surface 100a part of contiguous LGP 10.The first incidence surface 100a through making the most contiguous LGP 10 (that is; The first side 160a of substrate 160) the little diffusion structure 362a on first prism structure 362 has maximum average projecting height Sm; And the average projecting height Sm that makes little diffusion structure 362a by the first incidence surface 100a of contiguous LGP 10 toward away from the first incidence surface 100a (that is; The second side 160b of substrate 160) decrescence; Except the hot spot phenomenon that can be effectively be caused first light emitting diode 12 produces atomizing effect and not obvious, also can make the light that penetrates by blooming piece 36a have continuous taste.
Be shown in Fig. 7 equally, in present embodiment, first prism structure 362 has vertical height V2.Cause the taste of the light that blooming piece 36a penetrates not good owing to the light diffusion is excessive for fear of first prism structure 362; The average projecting height Sm of each little diffusion structure 362a is preferably less than 80% of the vertical height V2 of first prism structure 362; And then simultaneously focus is reached the effect of atomizing, and the light that blooming piece 36a is penetrated has preferable taste.
Be shown in Fig. 8 A equally; In present embodiment; Be positioned at the average projecting height Sm of the little diffusion structure 362a on first prism structure 362 of substrate 160 first side 160a; Be substantially first prism structure 362 that is positioned at substrate 160 center line C little diffusion structure 362a average projecting height Sm 10%～50%, that is the average projecting height Sm that is positioned at the little diffusion structure 362a of the first side 160a (the first incidence surface 100a) is greater than the little diffusion structure 362a that is positioned at center line C.Because the light diffusion of little diffusion structure 362a comparatively relaxes away from first incidence surface 100a gradient decrescence by the first incidence surface 100a of contiguous LGP 10 is past; Therefore the user can feel that observing the light time of being penetrated by blooming piece 36a light has more level and smooth taste.In addition; Be convenient explanation; This specification is only explained the relation of average projecting height Sm and distribution situation with the little diffusion structure 362a that in same prism structure, has same particle size; So the invention is not restricted to this, little diffusion structure 362a that can have different-grain diameter in same first prism structure 362 is to form average projecting height Sm.
Please with reference to Fig. 8 B.Fig. 8 B is the vertical view that another embodiment of the blooming piece 36a among Fig. 8 A is shown.
Shown in Fig. 8 B; In present embodiment; If toward the taste influence of the light that penetrates for blooming piece 36b away from first incidence surface 100a gradient decrescence significantly the time, first prism structure 362 of blooming piece 36b also can concentrate between the first side 160a and center line C of substrate 160 by the first incidence surface 100a of contiguous LGP 10 for the light diffusion of first prism structure 362.In other words, the average projecting height Sm that is positioned at the little diffusion structure 362a of the first side 160a (the first incidence surface 100a) is greater than the little diffusion structure 362a that is positioned at center line C, and the prism structure that is positioned at center line C can not have little diffusion structure 362a.Whereby, have the blooming piece 36b of less first prism structure, 362 quantity, on making, have the advantage of easy processing, and the fine ratio of product of blooming piece 36b also can obtain to promote.
Shown in Fig. 8 A and Fig. 8 B, blooming piece 36a and blooming piece 36b comprise a plurality of second prism structures 164 equally except the substrate 160 and first prism structure 362.Second prism structure 164 is arranged in the substrate 160.Each second prism structure 164 has smooth surface.In other words, second prism structure 164 does not have little diffusion particle or other can have the micro-structural of atomizing functions.Because the smooth surface of second prism structure 164 does not have the function of the hot spot phenomenon that atomizing first light emitting diode 12 caused, therefore second prism structure 164 can be arranged towards the first side 160a of contiguous first light emitting diode 12 by the second side 160b of substrate 160 away from first light emitting diode 12.
Please with reference to Fig. 8 C.Fig. 8 C is the vertical view that another embodiment of the blooming piece 36a among Fig. 8 A is shown.
Shown in Fig. 8 C; In present embodiment; Each second prism structure 164 is between wantonly two adjacent first prism structures 362, and the quantity of second prism structure 164 between wantonly two adjacent first prism structures 362, is by the second side 160b of substrate 160 towards the first side 160a decrescence.In present embodiment; Near the average projecting height Sm of the prism structure in first incidence surface 100a zone greater than other zones or center line C; This average projecting height Sm may be interpreted as many first prism structures 362 (promptly in the zone) and forms and get; Non-single first prism structure 362, that is average projecting height Sm is far away and successively decrease along with each region distance first incidence surface 100a.The blooming piece 36c of present embodiment; Be through making the quantity between wantonly two adjacent first prism structures 362 cumulative towards the second side 160b by the first side 160a of substrate 160; As making the light that is penetrated by blooming piece 36c have the means of more level and smooth taste, it is past away from the first incidence surface 100a practice decrescence by the first incidence surface 100a of contiguous LGP 10 that its visual effect that can reach is similar to the light diffusion that makes first prism structure 362.
Please with reference to Fig. 8 D.Fig. 8 D is the vertical view that another embodiment of the blooming piece 36a among Fig. 8 A is shown.
Shown in Fig. 8 D, the blooming piece 36d of present embodiment is suitable for being applied to the backlight module 3 that comprises first light emitting diode 12 and second light emitting diode 18 among Fig. 5.Because first light emitting diode 12 is over against the first incidence surface 100a of LGP 10; And second light emitting diode 18 is over against the second incidence surface 100c of LGP 10, and therefore the hot spot phenomenon that caused of first light emitting diode 12 and second light emitting diode 18 can betide the first incidence surface 100a and the second incidence surface 100c part of contiguous LGP 10 respectively.The first incidence surface 100a through making the most contiguous LGP 10 (that is; The first side 160a of substrate 160) with the second incidence surface 100c (that is; The second side 160b of substrate 160) first prism structure 362 has maximum light diffusion (making little diffusion structure 362a have maximum average projecting height Sm); And the light diffusion that makes first prism structure 362 respectively by the first incidence surface 100a of contiguous LGP 10 and the second incidence surface 100c towards the center line C of substrate 160 decrescence; Except the hot spot phenomenon that can be effectively first light emitting diode 12 and second light emitting diode 18 be caused produces atomizing effect and not obvious, also can make the light that penetrates by blooming piece 36d have continuous taste.
Please with reference to Fig. 8 E.Fig. 8 E is the vertical view that another embodiment of the blooming piece 36a among Fig. 8 A is shown.
Shown in Fig. 8 E; In present embodiment; Each second prism structure 164 is between wantonly two adjacent first prism structures 362; And the quantity of second prism structure 164 between wantonly two adjacent first prism structures 362 is cumulative towards center line C by the first side 160a and the second side 160b of substrate 160 respectively.The blooming piece 36e of present embodiment; Be through making the quantity between wantonly two adjacent first prism structures 362 cumulative by the first side 160a and the second side 160b of substrate 160 respectively towards center line C; As making the light that penetrates by blooming piece 36e have the means of more level and smooth taste, its visual effect that can reach be similar to make first prism structure 362 the light diffusion respectively by the first incidence surface 100a that is close to LGP 10 and the second incidence surface 100c towards the center line C of substrate 160 practice decrescence.
Please with reference to Fig. 9 A.Fig. 9 A is the vertical view that another embodiment of the blooming piece 36a among Fig. 8 A is shown.
Shown in Fig. 9 A, in present embodiment, adopt little diffusion structure 562a of same particle diameter on each first prism structure 562, and the little diffusion structure 562a on each first prism structure 562 has averag density.Averag density may be defined as the quantity of little diffusion structure 562a included on the unit are.The light diffusion of each first prism structure 562 reduces with the averag density of separately little diffusion structure 562a.In other words, if the little diffusion structure 562a on first prism structure 562 has bigger averag density, promptly represent first prism structure 562 to have bigger light diffusivity.Because first light emitting diode 12 is over against the first incidence surface 100a of LGP 10, therefore the hot spot phenomenon that caused of first light emitting diode 12 can betide the first incidence surface 100a part of contiguous LGP 10.The first incidence surface 100a through making the most contiguous LGP 10 (that is; The first side 160a of substrate 160) the little diffusion structure 562a on first prism structure 562 has maximum averag density; And the averag density that makes little diffusion structure 562a by the first incidence surface 100a of contiguous LGP 10 toward away from the first incidence surface 100a (that is; The second side 160b of substrate 160) decrescence; Except the hot spot phenomenon that can be effectively be caused first light emitting diode 12 produces atomizing effect and not obvious, also can make the light that penetrates by blooming piece 56a have continuous taste.
Be shown in Fig. 9 A equally; In present embodiment; Be positioned at the averag density of the little diffusion structure 562a on first prism structure 562 of substrate 160 first side 160a; Be substantially first prism structure 562 that is positioned at substrate 160 center line C little diffusion structure 562a averag density 10%～50%, that is the averag density of little diffusion structure 562a that is positioned at first side 160a zone is greater than the little diffusion structure 562a that is positioned at center line C zone.Because the light diffusion of little diffusion structure 562a comparatively relaxes away from first incidence surface 100a gradient decrescence by the first incidence surface 100a of contiguous LGP 10 is past; Therefore the user can feel that observing the light time of being penetrated by blooming piece 56a light has more level and smooth taste.
Please with reference to Fig. 9 B.Fig. 9 B is the vertical view that another embodiment of the blooming piece 56a among Fig. 9 A is shown.
Shown in Fig. 9 B; In present embodiment; If toward the taste influence of the light that penetrates for blooming piece 56b away from first incidence surface 100a gradient decrescence significantly the time, first prism structure 562 of blooming piece 56b also can concentrate between the first side 160a and center line C of substrate 160 by the first incidence surface 100a of contiguous LGP 10 for the light diffusion of first prism structure 562.Whereby, have the blooming piece 56b of less first prism structure, 562 quantity, on making, have the advantage of easy processing, and the fine ratio of product of blooming piece 56b also can obtain to promote.
Shown in Fig. 9 A and Fig. 9 B, blooming piece 56a and blooming piece 56b comprise a plurality of second prism structures 164 equally except the substrate 160 and first prism structure 562.Second prism structure 164 is arranged in the substrate 160.Each second prism structure 164 has smooth surface.Because the smooth surface of second prism structure 164 does not have the function of the hot spot phenomenon that atomizing first light emitting diode 12 caused, therefore second prism structure 164 can be arranged towards the first side 160a of contiguous first light emitting diode 12 by the second side 160b of substrate 160 away from first light emitting diode 12.
Please with reference to Fig. 9 C.Fig. 9 C is the vertical view that another embodiment of the blooming piece 56a among Fig. 9 A is shown.
Shown in Fig. 9 C; In present embodiment; Each second prism structure 164 is between wantonly two adjacent first prism structures 562, and the quantity of second prism structure 164 between wantonly two adjacent first prism structures 562, is by the second side 160b of substrate 160 towards the first side 160a decrescence.In present embodiment; Near the averag density of first prism structure 562 in first incidence surface 100a zone greater than other zones or center line C; This averag density may be interpreted as many first prism structures 562 (promptly in the zone) and forms and get; Non-single first prism structure 562, that is averag density is far away and successively decrease along with each region distance first incidence surface 100a.The blooming piece 56c of present embodiment; Be through making the quantity between wantonly two adjacent first prism structures 562 cumulative towards the second side 160b by the first side 160a of substrate 160; As making the light that is penetrated by blooming piece 56c have the means of more level and smooth taste, it is past away from the first incidence surface 100a practice decrescence by the first incidence surface 100a of contiguous LGP 10 that its visual effect that can reach is similar to the light diffusion that makes first prism structure 562.
Please with reference to Fig. 9 D.Fig. 9 D is the vertical view that another embodiment of the blooming piece 56a among Fig. 9 A is shown.
Shown in Fig. 9 D, the blooming piece 56d of present embodiment is suitable for being applied to the backlight module 3 that comprises first light emitting diode 12 and second light emitting diode 18 among Fig. 5.Because first light emitting diode 12 is over against the first incidence surface 100a of LGP 10; And second light emitting diode 18 is over against the second incidence surface 100c of LGP 10, and therefore the hot spot phenomenon that caused of first light emitting diode 12 and second light emitting diode 18 can betide the first incidence surface 100a and the second incidence surface 100c part of contiguous LGP 10 respectively.The first incidence surface 100a through making the most contiguous LGP 10 (that is; The first side 160a of substrate 160) with the second incidence surface 100c (that is; The second side 160b of substrate 160) first prism structure 562 has maximum light diffusion (making little diffusion structure 562a have maximum averag density); And the light diffusion that makes first prism structure 562 respectively by the first incidence surface 100a of contiguous LGP 10 and the second incidence surface 100c towards the center line C of substrate 160 decrescence; Except the hot spot phenomenon that can be effectively first light emitting diode 12 and second light emitting diode 18 be caused produces atomizing effect and not obvious, also can make the light that penetrates by blooming piece 56d have continuous taste.
Please with reference to Fig. 9 E.Fig. 9 E is the vertical view that another embodiment of the blooming piece 56a among Fig. 9 A is shown.
Shown in Fig. 9 E; In present embodiment; Each second prism structure 164 is between wantonly two adjacent first prism structures 562; And the quantity of second prism structure 164 between wantonly two adjacent first prism structures 562 is cumulative towards center line C by the first side 160a and the second side 160b of substrate 160 respectively.The blooming piece 56e of present embodiment; Be through making the quantity between wantonly two adjacent first prism structures 562 cumulative by the first side 160a and the second side 160b of substrate 160 respectively towards center line C; As making the light that penetrates by blooming piece 56e have the means of more level and smooth taste, its visual effect that can reach be similar to make first prism structure 562 the light diffusion respectively by the first incidence surface 100a that is close to LGP 10 and the second incidence surface 100c towards the center line C of substrate 160 practice decrescence.
In an embodiment, little diffusion structure 362a, 562a on first prism structure 362,562 can be ball-shaped or multiangular, but not as limit.
In an embodiment; In order to produce little diffusion structure 362a, 562a respectively on first prism structure 362,562 in Fig. 7 to Fig. 9 E; Can on the surface that fabrication tool-processing of blooming piece 36a～56e is taken turns, carry out blasting craft; And can adopt circular sand material or polygonal molding sand material in response to the shape of required little diffusion structure 362a, 562a, so as in substrate 160, producing first prism structure 362,562 that has little diffusion structure 362a, 562a respectively after the transfer printing.Perhaps, also can on the surface of processing wheel, carry out laser engraving technology, equally can be in substrate 160, producing first prism structure 362,562 after the transfer printing respectively with little diffusion structure 362a, 562a.
By above detailed description for specific embodiment of the present invention; Can find out significantly; Blooming piece of the present invention mainly is the face mist degree distribution situation through the control blooming piece; And then the center briliancy of adjustment blooming piece and the mist degree at focus edge, make blooming piece can have the function of diffusion and light harvesting effect simultaneously concurrently.Therefore, blooming piece proposed by the invention can make the center brightness of whole backlight module can keep original due briliancy under the situation that does not influence briliancy, and can reach significant atomizing effect again for the hot spot phenomenon that light emitting diode produced simultaneously.In addition, backlight module of the present invention mainly is through adopting the present invention can have the blooming piece of diffusion and light harvesting function simultaneously concurrently, and then can save and extraly add the conventional practice of diffusion sheet on one and reach the purpose that reduces cost.In other words; Backlight module proposed by the invention need not use diffusion sheet; So the backlight module that adopts traditional multi-layer optical membrane framework can reduce the quantity of piling up of blooming piece; Except avoiding producing the scratch problem of scraping between the blooming piece, also can reduce the built-up time of blooming piece and the integral thickness of backlight module.
Though the present invention with embodiment openly as above; Right its is not in order to limit the present invention; Any those of ordinary skills; Do not breaking away from the spirit and scope of the present invention, when can doing various changes and retouching, so protection scope of the present invention is as the criterion when looking appended the scope that claim defined.
Claims (27)
1. blooming piece comprises:
One substrate has two relative first side and second sides; And
A plurality of first prism structures are arranged in this substrate, and are arranged towards this second side by this first side, and each in said a plurality of first prism structures has a crooked crest, and this bending crest has a degree of fluctuation;
The said degree of fluctuation of wherein said a plurality of first prism structures by this first side towards this second side decrescence.
2. blooming piece as claimed in claim 1; In the wherein said crooked crest each has two-end-point; The said end points of each in the said crooked crest defines an average line; This corresponding relatively average line of in the said crooked crest each forms a plurality of ripples, and said a plurality of ripples of each in the said crooked crest have a mean wavelength, and each in the said degree of fluctuation reduces with this mean wavelength increase of correspondence.
3. blooming piece as claimed in claim 2; Wherein the central authorities of this substrate have a center line; This center line is between this first side and this second side; Be positioned at this mean wavelength of this first prism structure of this first side, be substantially this first prism structure that is positioned at this center line this mean wavelength 10%～50%.
4. blooming piece as claimed in claim 1; In the wherein said crooked crest each has two-end-point; The said end points of each in the said crooked crest defines an average line; This corresponding relatively average line of in the said crooked crest each forms a plurality of ripples, and said a plurality of ripples of each in the said crooked crest have a mean amplitude of tide, and each in the said degree of fluctuation increases with this mean amplitude of tide of correspondence.
5. blooming piece as claimed in claim 4, each structure in wherein said a plurality of first prisms has an average vertical height, and said mean amplitude of tide is less than 20% of this average vertical height.
6. blooming piece as claimed in claim 4, each in wherein said a plurality of first prism structures has an average level width, and said mean amplitude of tide is less than 20% of this average level width.
7. blooming piece as claimed in claim 4; Wherein the central authorities of this substrate have a center line; This center line is between this first side and this second side; Be positioned at this mean amplitude of tide of this first prism structure of this center line, be substantially this first prism structure that is positioned at this first side this mean amplitude of tide 10%～50%.
8. blooming piece as claimed in claim 1, wherein the central authorities of this substrate have a center line, and this center line is between this first side and this second side, and said a plurality of first prism structures are between this first side and this center line.
9. blooming piece as claimed in claim 1; Wherein the central authorities of this substrate have a center line; This center line is between this first side and this second side, and the said degree of fluctuation of said a plurality of first prism structures respectively by this first side and this second side towards this center line decrescence.
10. blooming piece as claimed in claim 1; Further comprise a plurality of second prism structures; Be arranged in this substrate, each in said a plurality of second prism structures has a straight crest, and each in said a plurality of second prism structures is between wantonly two adjacent said a plurality of first prism structures; And the quantity of said a plurality of second prism structure between wantonly two adjacent said a plurality of first prism structures is by this second side towards this first side decrescence.
11. blooming piece as claimed in claim 10, wherein the central authorities of this substrate have a center line, and this center line is between this first side and this second side, and said a plurality of second prism structures are between this second side and this center line.
12. blooming piece as claimed in claim 10; Wherein the central authorities of this substrate have a center line; This center line is between this first side and this second side; The quantity of said a plurality of second prism structure between wantonly two adjacent said a plurality of first prism structures is cumulative towards this center line by this first side and this second side respectively.
13. a blooming piece comprises:
One substrate has two relative first side and second sides;
A plurality of first prism structures are arranged in this substrate, and are arranged towards this second side by this first side; And
A plurality of little diffusion structures are arranged on the surface of said a plurality of first prism structures, cause in said a plurality of first prism structure each to have a smooth diffusion;
The said smooth diffusion of wherein said a plurality of first prism structures by this first side towards this second side decrescence.
14. blooming piece as claimed in claim 13, the said a plurality of little diffusion structures on each in said a plurality of first prism structures have an average projecting height, each in the said smooth diffusion reduces with this average projecting height of correspondence.
15. blooming piece as claimed in claim 14, wherein said a plurality of first prism structures have a vertical height, and said average projecting height is less than 80% of this vertical height.
16. blooming piece as claimed in claim 14; Wherein the central authorities of this substrate have a center line; This center line is between this first side and this second side; Be positioned at this average projecting height of said little diffusion structure of this first prism structure of this first side, be substantially this first prism structure that is positioned at this center line said little diffusion structure this average projecting height 10%～50%.
17. blooming piece as claimed in claim 13; Said little diffusion structure in wherein said a plurality of first prism structure each has an averag density; This averag density is the quantity of said little diffusion structure included on the unit are, and each in the said smooth diffusion reduces with this averag density of correspondence.
18. blooming piece as claimed in claim 17; Wherein the central authorities of this substrate have a center line; This center line is between this first side and this second side; Be positioned at this averag density of the said little diffusion structure on this first prism structure of this first side, be substantially the said little diffusion structure on this first prism structure that is positioned at this center line this averag density 10%～50%.
19. blooming piece as claimed in claim 13, wherein the central authorities of this substrate have a center line, and this center line is between this first side and this second side, and said a plurality of first prism structures are between this first side and this center line.
20. blooming piece as claimed in claim 13; Wherein the central authorities of this substrate have a center line; This center line is between this first side and this second side, and the said smooth diffusion of said a plurality of first prism structures respectively by this first side and this second side towards this center line decrescence.
21. blooming piece as claimed in claim 13; Further comprise a plurality of second prism structures; Be arranged in this substrate, each in said a plurality of second prism structures has smooth surface, and each in said a plurality of second prism structures is between wantonly two adjacent said a plurality of first prism structures; And the quantity of said a plurality of second prism structure between wantonly two adjacent said a plurality of first prism structures is by this second side towards this first side decrescence.
22. blooming piece as claimed in claim 21, wherein the central authorities of this substrate have a center line, and this center line is between this first side and this second side, and said a plurality of second prism structures are between this second side and this center line.
23. blooming piece as claimed in claim 21; Wherein the central authorities of this substrate have a center line; This center line is between this first side and this second side; The quantity of said a plurality of second prism structure between wantonly two adjacent said a plurality of first prism structures is cumulative towards this center line by this first side and this second side respectively.
24. blooming piece as claimed in claim 13, wherein said little diffusion structure is ball-shaped or multiangular.
25. a backlight module comprises:
One LGP has one first incidence surface and an exiting surface, and wherein this first incidence surface is connected with this exiting surface;
A plurality of first light emitting diodes are arranged along this first incidence surface;
One diffusion sheet is arranged on this exiting surface; And
One blooming piece comprises:
One substrate is arranged on this diffusion sheet; And
A plurality of first prism structures; Be arranged in this substrate; And extend along the orientation of said a plurality of first light emitting diodes, wherein the diffusion of said a plurality of first prism structures in the zone of contiguous said light emitting diode can be greater than the zone away from said light emitting diode.
26. backlight module as claimed in claim 25, one of them of wherein said a plurality of first prism structures has curvilinear corner angle staff, to form different diffusions.
27. backlight module as claimed in claim 25, one of them of wherein said a plurality of first prism structures have a plurality of little diffusion structures, to form different diffusions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410812362.0A CN104460113B (en) | 2011-10-04 | 2011-11-11 | Optical film and backlight module using same |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW100135899 | 2011-10-04 | ||
| TW100135899A TWI459043B (en) | 2011-10-04 | 2011-10-04 | Optical film and backlight module using the same |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410812362.0A Division CN104460113B (en) | 2011-10-04 | 2011-11-11 | Optical film and backlight module using same |
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| Publication Number | Publication Date |
|---|---|
| CN102364239A true CN102364239A (en) | 2012-02-29 |
| CN102364239B CN102364239B (en) | 2014-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110364794.6A Expired - Fee Related CN102364239B (en) | 2011-10-04 | 2011-11-11 | Optical film and backlight module using same |
| CN201410812362.0A Expired - Fee Related CN104460113B (en) | 2011-10-04 | 2011-11-11 | Optical film and backlight module using same |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410812362.0A Expired - Fee Related CN104460113B (en) | 2011-10-04 | 2011-11-11 | Optical film and backlight module using same |
Country Status (2)
| Country | Link |
|---|---|
| CN (2) | CN102364239B (en) |
| TW (1) | TWI459043B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102830460A (en) * | 2012-08-06 | 2012-12-19 | 北京京东方光电科技有限公司 | Light guide plate, prism film, backlight module and display device |
| CN103439830A (en) * | 2013-07-23 | 2013-12-11 | 宁波激智科技股份有限公司 | Multifunctional film applied to side-light type backlight module |
| CN103777259A (en) * | 2012-10-22 | 2014-05-07 | 嘉威光电股份有限公司 | Optical diaphragm suitable for edge-type backlight module |
| CN104459843B (en) * | 2014-12-16 | 2016-11-16 | 京东方科技集团股份有限公司 | Diffusion sheet and preparation method thereof, backlight module |
| CN103439830B (en) * | 2013-07-23 | 2016-11-30 | 宁波激智科技股份有限公司 | A kind of multifunctional membrane being applied to sidelight type backlight module |
| CN108957606A (en) * | 2018-07-05 | 2018-12-07 | 深圳创维－Rgb电子有限公司 | A kind of design method and compound film sheet of compound film sheet |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111681564A (en) * | 2020-06-12 | 2020-09-18 | 中山市宏晟祥光电照明科技有限公司 | Gradual change LED display screen |
| TWI838977B (en) * | 2022-11-25 | 2024-04-11 | 達運精密工業股份有限公司 | Light guide plate structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH112729A (en) * | 1997-06-11 | 1999-01-06 | Toshiba Lighting & Technol Corp | Backlight and liquid crystal display device using the same |
| CN1504808A (en) * | 2002-11-29 | 2004-06-16 | 富士通株式会社 | Light guiding plate , illumination apparatus and display apparatus |
| CN1788231A (en) * | 2003-07-01 | 2006-06-14 | Lgs有限公司 | Prism sheet of back light unit for LCD |
| US20070121227A1 (en) * | 2004-07-02 | 2007-05-31 | Efun Technology Co., Ltd. | Brightness enhancement film having curved prism units and light scattering particles |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050185112A1 (en) * | 2002-03-14 | 2005-08-25 | Nitto Denko Corporation | Back light and liquid crystal display unit using this |
| JP4181792B2 (en) * | 2002-05-21 | 2008-11-19 | 日本ライツ株式会社 | Light guide plate and flat illumination device |
| CN2588387Y (en) * | 2002-12-13 | 2003-11-26 | 鸿富锦精密工业（深圳）有限公司 | Light conducting board and plane illumination device |
| KR20060079234A (en) * | 2003-09-19 | 2006-07-05 | 소니 가부시끼 가이샤 | Backlight device and liquid crystal display |
| TWM331675U (en) * | 2007-11-30 | 2008-05-01 | Taiwan Nano Electro Opt Tech | Improved structure for light guide plate |
| TW201024810A (en) * | 2008-12-31 | 2010-07-01 | Univacco Technology Inc | Hybrid optical film and back light module using the same |
-
2011
- 2011-10-04 TW TW100135899A patent/TWI459043B/en not_active IP Right Cessation
- 2011-11-11 CN CN201110364794.6A patent/CN102364239B/en not_active Expired - Fee Related
- 2011-11-11 CN CN201410812362.0A patent/CN104460113B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH112729A (en) * | 1997-06-11 | 1999-01-06 | Toshiba Lighting & Technol Corp | Backlight and liquid crystal display device using the same |
| CN1504808A (en) * | 2002-11-29 | 2004-06-16 | 富士通株式会社 | Light guiding plate , illumination apparatus and display apparatus |
| CN1788231A (en) * | 2003-07-01 | 2006-06-14 | Lgs有限公司 | Prism sheet of back light unit for LCD |
| US20070121227A1 (en) * | 2004-07-02 | 2007-05-31 | Efun Technology Co., Ltd. | Brightness enhancement film having curved prism units and light scattering particles |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102830460A (en) * | 2012-08-06 | 2012-12-19 | 北京京东方光电科技有限公司 | Light guide plate, prism film, backlight module and display device |
| CN103777259A (en) * | 2012-10-22 | 2014-05-07 | 嘉威光电股份有限公司 | Optical diaphragm suitable for edge-type backlight module |
| CN103439830A (en) * | 2013-07-23 | 2013-12-11 | 宁波激智科技股份有限公司 | Multifunctional film applied to side-light type backlight module |
| CN103439830B (en) * | 2013-07-23 | 2016-11-30 | 宁波激智科技股份有限公司 | A kind of multifunctional membrane being applied to sidelight type backlight module |
| CN104459843B (en) * | 2014-12-16 | 2016-11-16 | 京东方科技集团股份有限公司 | Diffusion sheet and preparation method thereof, backlight module |
| US10317616B2 (en) | 2014-12-16 | 2019-06-11 | Boe Technology Group Co., Ltd. | Diffusion plate and manufacturing method thereof, backlight module |
| CN108957606A (en) * | 2018-07-05 | 2018-12-07 | 深圳创维－Rgb电子有限公司 | A kind of design method and compound film sheet of compound film sheet |
| CN108957606B (en) * | 2018-07-05 | 2021-03-30 | 深圳创维－Rgb电子有限公司 | Design method of composite diaphragm and composite diaphragm |
| US11947137B2 (en) | 2018-07-05 | 2024-04-02 | Shenzhen Skyworth-Rgb Electronic Co., Ltd | Method for composite membrane and composite membrane |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104460113A (en) | 2015-03-25 |
| TWI459043B (en) | 2014-11-01 |
| TW201316043A (en) | 2013-04-16 |
| CN102364239B (en) | 2014-11-26 |
| CN104460113B (en) | 2018-02-13 |
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