CN102364239B - Optical film and backlight module using same - Google Patents
Optical film and backlight module using same Download PDFInfo
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- CN102364239B CN102364239B CN201110364794.6A CN201110364794A CN102364239B CN 102364239 B CN102364239 B CN 102364239B CN 201110364794 A CN201110364794 A CN 201110364794A CN 102364239 B CN102364239 B CN 102364239B
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- 239000012788 optical film Substances 0.000 title abstract 6
- 238000009792 diffusion process Methods 0.000 claims abstract description 125
- 239000000758 substrate Substances 0.000 claims abstract description 97
- 238000005452 bending Methods 0.000 claims abstract 5
- 230000000694 effects Effects 0.000 abstract description 17
- 238000000889 atomisation Methods 0.000 abstract description 7
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- 230000001186 cumulative effect Effects 0.000 description 11
- 230000006870 function Effects 0.000 description 10
- 239000004973 liquid crystal related substance Substances 0.000 description 7
- 230000000007 visual effect Effects 0.000 description 6
- 238000007598 dipping method Methods 0.000 description 5
- 238000003306 harvesting Methods 0.000 description 5
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Classifications
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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
-
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/04—Prisms
- G02B5/045—Prism arrays
-
- 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
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 liquid crystal display.Due to the liquid crystal panel luminous ability of tool not itself, the function of backlight module is well-off brightness and the light source being evenly distributed, and makes liquid crystal display can normally show image.Liquid crystal display has been widely used in the electronic product of the tool growth potentiality such as monitor, notebook computer, digital camera and projector at present, therefore drives the demand Sustainable Growth of backlight module and relevant spare part thereof.In general, provide the liquid crystal display of the purposes of display frame, its backlight module can comprise diffusion sheet, brightness enhancement film (BEF), upper diffusion sheet and light emitting source conventionally.At present, the trend of liquid crystal display is driven gesture and mostly traditional cold-cathode tube (CCFL) light source has been replaced as to light emitting diode (LED) light source compared with power saving.
Yet, light emitting diode is pointolite, not if traditional cold-cathode tube is line source, so between light emitting diode, arrangement spaced reciprocally can cause light source to disperse uneven problem, and this is also to cause light emitting diode to produce the main cause of focus (Hot Spot) phenomenon.In addition, in order to improve briliancy, backlight module is often understood horizontal positioned brightness enhancement film, but brightness enhancement film has again the effect of splitting picture (image splitting), therefore also indirectly hot spot phenomenon is become to more serious.Moreover; under the trend reducing costs with material sorting; backlight module often can be integrated into a composite membrane upper diffusion sheet and brightness enhancement film; therefore also indirectly cause atomizing effect variation; equally also make the problem of hot spot phenomenon gradually serious, also cause user can observe easily the phenomenon of bright dark inequality.Although liquid crystal display can expand glue frame in order to cover focus, but this practice can cause viewing area to diminish, or the size of panel module becomes large.
Summary of the invention
For solving the problem of known technology, one embodiment of the invention are a kind of blooming pieces, it is mainly by controlling the face mist degree distribution situation of blooming piece, and then adjust the center briliancy of blooming piece and the mist degree at focus edge, make blooming piece can have the function of diffusion and light harvesting effect concurrently simultaneously.Therefore, blooming piece proposed by the invention can make the center brightness of whole backlight module can keep original due briliancy in the situation that not affecting briliancy, and the hot spot phenomenon producing for light emitting diode can reach significant atomizing effect again simultaneously.
According to one embodiment of the invention, a kind of blooming piece comprises substrate and a plurality of the first prism structure.Substrate has two relative the first side and the second sides.The first prism structure is arranged in substrate, and is arranged towards the second side by the first side.Each first prism structure has crooked crest.Crooked crest has degree of fluctuation.The degree of fluctuation of the first prism structure by the first side towards the second side decrescence.
In one embodiment of the invention, each above-mentioned crooked crest has two-end-point.The end points definition average line of each crooked crest.The average line that each crooked crest is relatively corresponding forms a plurality of ripples.The ripple of each crooked crest has mean wavelength.Each degree of fluctuation increases and reduces with corresponding mean wavelength.
In one embodiment of the invention, the central authorities of above-mentioned substrate have center line.Center line is between the first side and the second side.Be positioned at the mean wavelength of the first prism structure of the first side, be substantially the first prism structure that is positioned at center line mean wavelength 10%～50%.
In one embodiment of the invention, the ripple of each above-mentioned crooked crest has average amplitude.Each degree of fluctuation increases with corresponding average amplitude.
In one embodiment of the invention, above-mentioned each the first prism structure has average vertical height.Average amplitude is less than 20% of average vertical height.
In one embodiment of the invention, above-mentioned each the first prism structure has average level width.Average amplitude is less than 20% of average level width.
In one embodiment of the invention, be positioned at the average amplitude of the first prism structure of center line, be substantially the first prism structure that is positioned at the first side average amplitude 10%～50%.
In one embodiment of the invention, the first above-mentioned prism structure is between the first side and center line.
In one embodiment of the invention, the degree of fluctuation of the first above-mentioned prism structure respectively by the first side and the second side towards center line decrescence.
In one embodiment of the invention, above-mentioned blooming piece further comprises a plurality of the second prism structures.The second prism structure is arranged in substrate.Each second prism structure has straight crest.Each second prism structure is between wantonly two adjacent the first prism structures.And the quantity of the second prism structure between wantonly two adjacent the first prism structures, is by the second side towards the first side decrescence.
In one embodiment of the invention, the second above-mentioned prism structure is between the second side and center line.
In one embodiment of the invention, the quantity of the second above-mentioned prism structure between wantonly two adjacent the first prism structures, is cumulative towards center line by the first side and the second side respectively.
According to another embodiment of the present invention, a kind of blooming piece comprises substrate, a plurality of the first prism structure and a plurality of micro-diffusion structure.Substrate has two relative the first side and the second sides.The first prism structure is arranged in substrate, and is arranged towards the second side by the first side.Micro-diffusion structure is arranged on the surface of the first prism structure, causes each first prism structure to have light diffusion.The light diffusion of the first prism structure by the first side towards the second side decrescence.
In one embodiment of the invention, the micro-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 micro-diffusion structure of the first prism structure of the first side, be substantially the first prism structure that is positioned at center line micro-diffusion structure average projecting height 10%～50%.
In one embodiment of the invention, the micro-diffusion structure on above-mentioned each the first prism structure has average density.Average density is the quantity of micro-diffusion structure included in unit area.Each light diffusion reduces with corresponding average density.
In one embodiment of the invention, be positioned at the average density of the micro-diffusion structure on the first prism structure of the first side, be substantially the micro-diffusion structure on the first prism structure that is positioned at center line average density 10%～50%.
In one embodiment of the invention, the light diffusion of the first above-mentioned prism structure respectively by the first side and the second side towards center line decrescence.
In one embodiment of the invention, above-mentioned blooming piece further comprises a plurality of the second prism structures.The second prism structure is arranged in substrate.Each second prism structure has smooth surface.Each second prism structure is between wantonly two adjacent the first prism structures.And the quantity of the second prism structure between wantonly two adjacent the first prism structures, is by the second side towards the first side decrescence.
In one embodiment of the invention, above-mentioned micro-diffusion structure is ball-shaped or multiangular.
Another embodiment of the present invention is a kind of backlight module, and it is mainly by adopt the present invention can have the blooming piece of diffusion and light harvesting function concurrently simultaneously, and then can save and additionally add the conventional practice of diffusion sheet on one and reach the object reducing costs.In other words, backlight module proposed by the invention does not need to use diffusion sheet, so the backlight module that adopts traditional multi-layer optical membrane framework can reduce the stacking quantity of blooming piece, except avoiding producing the scratching of scraping between 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 light guide plate, a plurality of the first light emitting diode, diffusion sheet and blooming piece.Light guide plate has the first incidence surface and exiting surface.The first incidence surface is connected with exiting surface.The first light emitting diode is arranged along the first incidence surface.Diffusion sheet is arranged on exiting surface.Blooming piece comprises substrate and a plurality of the first prism structure.Substrate is arranged on diffusion sheet.The first prism structure is arranged in substrate, and extends along the orientation of the first light emitting diode.The diffusion of first prism structure in the region of contiguous light emitting diode can be greater than the region 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 micro-diffusion structures, to form different diffusions.
Accompanying drawing explanation
Fig. 1 is the side view illustrating according to the backlight module of one embodiment of the invention.
Fig. 2 is the stereographic map that the blooming piece in Fig. 1 is shown.
Fig. 3 A is the vertical view that blooming piece in Fig. 2 one first prism structure is wherein shown.
Fig. 3 B is the stereographic map that the first prism structure in Fig. 3 A is shown, and wherein the first prism structure is the form deflecting.
Fig. 3 C is the stereographic map that another embodiment of the first prism structure in Fig. 3 A is shown, the form that wherein the first prism structure is dipping and heaving.
Fig. 4 A is the vertical view that the blooming piece in Fig. 2 is shown.
Fig. 4 B is the vertical view that another embodiment of the blooming piece in Fig. 4 A is shown.
Fig. 4 C is the vertical view that another embodiment of the blooming piece in Fig. 4 A is shown.
Fig. 5 is the side view illustrating according to the backlight module of another embodiment of the present invention.
Fig. 6 A is the vertical view that the blooming piece in Fig. 5 is shown.
Fig. 6 B is the vertical view that another embodiment of the blooming piece in Fig. 6 A is shown.
Fig. 7 is the side view that another embodiment of blooming piece in Fig. 1 one first prism structure is wherein shown.
Fig. 8 A is the vertical view that an embodiment of the blooming piece in Fig. 2 is shown, and it is the first prism structure adopting in Fig. 7.
Fig. 8 B is the vertical view that another embodiment of the blooming piece in Fig. 8 A is shown.
Fig. 8 C is the vertical view that another embodiment of the blooming piece in Fig. 8 A is shown.
Fig. 8 D is the vertical view that another embodiment of the blooming piece in Fig. 8 A is shown.
Fig. 8 E is the vertical view that another embodiment of the blooming piece in Fig. 8 A is shown.
Fig. 9 A is the vertical view that another embodiment of the blooming piece in Fig. 8 A is shown.
Fig. 9 B is the vertical view that another embodiment of the blooming piece in Fig. 9 A is shown.
Fig. 9 C is the vertical view that another embodiment of the blooming piece in Fig. 9 A is shown.
Fig. 9 D is the vertical view that another embodiment of the blooming piece in Fig. 9 A is shown.
Fig. 9 E is the vertical view that another embodiment of the blooming piece in Fig. 9 A is shown.
[main description of reference numerals]
1,3: backlight module 10: light guide plate
100a: the first incidence surface 100b: exiting surface
100c: the second incidence surface 102: Christmas tree pattern
Within 12: the first, light emitting diode 14: diffusion sheet
16a, 16b, 16c, 16d, 16e: blooming piece
160: substrate 160a: the first side
160b: the second side 162: the first prism structure
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: micro-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
Embodiment
Below will disclose a plurality of embodiment of the present invention with accompanying drawing, as clearly stated, the details in many practices will be explained in the following description.Yet, should be appreciated that, the details in these practices does not apply to limit the present invention.That is to say, in part embodiment of the present invention, the details in these practices is non-essential.In addition,, for the purpose of simplifying accompanying drawing, some known habitual structures and element illustrate the mode simply to illustrate in the accompanying drawings.
One embodiment of the invention are a kind of backlight modules.More particularly, it is mainly by adopt the present invention can have the blooming piece of diffusion and light harvesting function concurrently simultaneously, and then can save and additionally add the conventional practice of diffusion sheet on one and reach the object reducing costs.In other words, backlight module proposed by the invention does not need to use diffusion sheet, so the backlight module that adopts traditional multi-layer optical membrane framework can reduce the stacking quantity of blooming piece, except avoiding producing the scratching of scraping between blooming piece, also can reduce the built-up time of blooming piece and the integral thickness of backlight module.
Please refer to Fig. 1.Fig. 1 is the side view illustrating according to the backlight module 1 of one embodiment of the invention.
As shown in Figure 1, in the present embodiment, backlight module 1 comprises light guide plate 10, a plurality of the first light emitting diode 12, diffusion sheet 14 and blooming piece 16a.The light guide plate 10 of backlight module 1 has the first incidence surface 100a and exiting surface 100b.The first incidence surface 100a of light guide plate 10 is connected with exiting surface 100b.The first light emitting diode 12 of backlight module 1 is flatly arranged along the first incidence surface 100a of light guide plate 10.Because Fig. 1 is the side view of backlight module 1 of the present invention, therefore first light emitting diode 12 is only shown.The diffusion sheet 14 of backlight module 1 is arranged on the exiting surface 100b of light guide plate 10.The blooming piece 16a of backlight module 1 is arranged on diffusion sheet 14.In other words, the diffusion sheet 14 of backlight module 1 from bottom to top sequentially arranges with blooming piece 16a the exiting surface 100b top that is stacked in light guide plate 10.In addition, light guide plate 10 bottoms of backlight module 1 are also provided with Christmas tree pattern 102.Whereby, after the light of launching at the first light emitting diode 12 of backlight module 1 enters light guide plate 10 by the first incidence surface 100a, light can be positioned at immediately Christmas tree pattern 102 reflections of light guide plate 10 bottoms and leave light guide plate 10 by exiting surface 100b, and sequentially by diffusion sheet 14, leaves backlight module 1 with blooming piece 16a.
Please refer to Fig. 2.Fig. 2 is the stereographic map that the blooming piece 16a in Fig. 1 is shown.
As shown in Figure 2, in the present embodiment, the blooming piece 16a of backlight module 1 comprises substrate 160 and a plurality of the first prism structure 162.The substrate 160 of blooming piece 16a is arranged on the diffusion sheet 14 of backlight module 1, and has two relative the first side 160a and the second side 160b.The first side 160a of substrate 160 and the first incidence surface 100a of light guide plate 10 are positioned at the same side, and contiguous the first light emitting diode 12.The first prism structure 162 of blooming piece 16a is arranged in substrate 160.The first prism structure 162 of blooming piece 16a extends along the orientation of the 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 region of contiguous light emitting diode 12 can be greater than the diffusion away from first prism structure 162 in the region of light emitting diode 12.In the present embodiment, each first prism structure 162 has crooked crest 162a, in the 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 meaning as point-like.The crooked crest 162a of the first prism structure 162 has degree of fluctuation.In the present embodiment, in order to adjust the means of the diffusion of the first prism structure 162, can reach by changing the degree of fluctuation of crooked crest 162a.The degree of fluctuation of the first prism structure 162 is from the first incidence surface 100a that is close to light guide plate 10 toward away from the first incidence surface 100a decrescence, that is the degree of fluctuation of the first prism structure 162 of contiguous light emitting diode 12 can be greater than other regions.
Please refer to Fig. 3 A, Fig. 3 B and Fig. 3 C.Fig. 3 A is the vertical view that blooming piece 16a in Fig. 2 one first prism structure 162 is wherein shown.Fig. 3 B is the stereographic map that the first prism structure 162 in Fig. 3 A is shown, wherein the form of the first prism structure 162 for deflecting.Fig. 3 C is the stereographic map that another embodiment of the first prism structure 162 in Fig. 3 A is shown, the form that wherein the first prism structure 162 is dipping and heaving.
As shown in Figure 3A and 3B, in the present embodiment, the crooked crest 162a of each the 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 the 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 a plurality of specific wavelength W of the crooked crest 162a of same are obtained after mean value, is the mean wavelength Wm of crooked crest 162a.In other words, mean wavelength Wm can be by averaging the wavelength of the upper all ripples of crooked crest 162a to obtain.The degree of fluctuation of each the first prism structure 162 reduces with mean wavelength Wm increase separately.(note: Fig. 3 A is the vertical view of single the first prism structure 162, non-three crooked crests) in other words, if the ripple of crooked crest 162a has shorter mean wavelength Wm, more except representing the quantity of the ripple on crooked crest 162a, also represent that the first prism structure 162 has the flexural oscillations trend that frequency is larger.Due to the first incidence surface 100a of the first light emitting diode 12 over against light guide plate 10, focus (Hot spot) phenomenon that therefore the first light emitting diode 12 causes can betide the first incidence surface 100a part of contiguous light guide plate 10.By make to be close to most light guide plate 10 the first incidence surface 100a (that is, the first side 160a of substrate 160) the first prism structure 162 has the shortest mean wavelength Wm, and the mean wavelength Wm that makes the first prism structure 162 from the first incidence surface 100a that is close to light guide plate 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 effectively cause the first light emitting diode 12 produces atomizing effect and not obvious, the light that also can make to be penetrated by blooming piece 16a has continuous taste (that is, briliancy and colourity).In other words, utilization have the first prism structure 162 of higher degree of fluctuation can atomization near the hot spot phenomenon that enters the side of the first light face 100a, by thering is the first prism structure 162 of the degree of fluctuation of graded, can make the continuous briliancy of having of whole exiting surface 100b and colourity 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 a plurality of particular amplitude A of the crooked crest 162a of same are obtained after mean value, is the average amplitude Am of crooked crest 162a.In other words, average amplitude Am can be by averaging the upper all wave amplitudes of crooked crest 162a to obtain.The degree of fluctuation of each the first prism structure 162 increases with average amplitude Am separately.In other words, if the ripple of crooked crest 162a has larger average amplitude Am, longer except representing the total length of crooked crest 162a, also represent that the first prism structure 162 has the flexural oscillations trend of big rise and fall.By making to be close to most the first prism structure 162 of the first incidence surface 100a of light guide plate 10, there is maximum average amplitude Am, and the average amplitude Am that makes the first prism structure 162 is from the first incidence surface 100a that is close to light guide plate 10 toward away from the first incidence surface 100a decrescence, not obvious except the hot spot phenomenon that can effectively cause the first light emitting diode 12 produces atomizing effect equally, also can make the light being penetrated by blooming piece 16a there is continuous taste.
As shown in Figure 3A and 3B, each first prism structure 162 of blooming piece 16a can have average vertical height V1m and average level width Hm.Further illustrate, if the form of the first prism structure 162 for deflecting of blooming piece 16a, the first prism structure 162 has a plurality of not wide triangular-sections, the horizontal width H of same first prism structure 162 each triangular-sections is averaged, and is the average level width Hm of the first prism structure 162.In other words, average level width Hm is the mean value of the horizontal width of the first prism structure 162 relative substrates 160.
As shown in Figure 3 C, if the form that the first prism structure 162 of blooming piece 16a is dipping and heaving, the first prism structure 162 has a plurality of not contour triangular-sections, the vertical height V1 of same first prism structure 162 each triangular-sections is averaged, and is the average vertical height V1m of the first prism structure 162.In other words, average vertical height V1m is the mean value of the vertical height of the first prism structure 162 relative substrates 160.
In the present embodiment, for fear of the first prism structure 162 on blooming piece 16a, because degree of fluctuation is excessive, cause the taste of the light that blooming piece 16a penetrates not good, and can cause briliancy to decline, the average amplitude Am of each the first prism structure 162 can be less than average vertical height V1m 20% or average level width Hm 20%, and then focus is reached the effect of atomization, and the light that blooming piece 16a is penetrated has preferably taste simultaneously.In the present embodiment, the first prism structure 162 of blooming piece 16a is only not limited to can dipping and heaving (as shown in Fig. 3 A and Fig. 3 B) or left and right skew (as shown in Figure 3 C), also can at random swing up and down.In above-mentioned different embodiment, utilize the first prism structure 162 can there is dipping and heaving, swing to cause different degree of fluctuation, in other words, by changing specific wavelength W (or mean wavelength Wm), particular amplitude A (or average amplitude Am), vertical height V (or the high Vm of average vertical) or the horizontal width H (or average level width Hm) of the crooked crest 162a of the first prism structure 162, make the first prism structure 162 there is the corner angle staff of different curvature, and form different degree of fluctuation, to change the diffusion of the first prism structure 162.
Please refer to Fig. 4 A.Fig. 4 A is the vertical view that the blooming piece 16a in Fig. 2 is shown.
As shown in Figure 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 the 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 the first prism structure 162 of substrate 160 first side 160a, be substantially the first prism structure 162 that is positioned at substrate 160 center line C mean wavelength Wm 10%～50%, that is the mean wavelength Wm that is positioned at the first prism structure 162 of the first side 160a can be greater than the mean wavelength Wm of the first prism structure 162 that is positioned at center line C.The present embodiment is only usingd between the first side 160a and the second side 160b Centromedian center line C as separatrix, but not as limit, can adjust according to demand marginal position.For example, center line C can be positioned at the center of viewing area, and wherein viewing area is in display panel, to have the region of demonstration effect.In the present embodiment, because the degree of fluctuation of the first prism structure 162 is from the first incidence surface 100a that is close to light guide plate 10 toward comparatively relaxing away from the first incidence surface 100a gradient decrescence, therefore user, observing the light time of being penetrated by blooming piece 16a, can feel that light has more level and smooth taste.
On the other hand, in order to make the degree of fluctuation of the first prism structure 162 from the first incidence surface 100a that is close to light guide plate 10 toward comparatively relaxing away from the first incidence surface 100a gradient decrescence, and allow user observe the light time of being penetrated by blooming piece 16a, sensation light has more level and smooth taste, in an embodiment, also can make to be positioned at this average amplitude of this first prism structure of this center line, be substantially this first prism structure that is positioned at this first side this average amplitude 10%～50%.
Please refer to Fig. 4 B.Fig. 4 B is the vertical view that another embodiment of the blooming piece 16a in Fig. 4 A is shown.
As shown in Figure 4 B, in the present embodiment, if the taste impact of the degree of fluctuation of the first prism structure 162 from the first incidence surface 100a that is close to light guide plate 10 toward the light penetrating for blooming piece 16b away from the first incidence surface 100a gradient is decrescence significantly time, the first prism structure 162 of blooming piece 16b also can concentrate between the first side 160a and center line C of substrate 160.Whereby, there is the blooming piece 16b of less the first prism structure 162 quantity, on manufacturing, there is easy processing, and the fine ratio of product of blooming piece 16b also can obtain lifting.
As shown in Figure 4 A and 4 B shown in FIG., blooming piece 16a and blooming piece 16b, except substrate 160 and the first prism structure 162, also comprise a plurality of the second prism structures 164.The second prism structure 164 is arranged in substrate 160.Each second prism structure 164 has straight crest 164a.Because the straight crest 164a of the second prism structure 164 does not have the function of the hot spot phenomenon that atomization the first light emitting diode 12 causes, therefore the second prism structure 164 can be arranged towards the first side 160a of contiguous the first light emitting diode 12 by the second side 160b away from the first light emitting diode 12 by substrate 160.In the present embodiment, the first side 160a and the second side 160b of the parallel substrate 160 of straight crest 164a of each the second prism structure 164, but not as limit.In another embodiment, the straight crest 164a of each the 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 refer to Fig. 4 C.Fig. 4 C is the vertical view that another embodiment of the blooming piece 16a in Fig. 4 A is shown.
As shown in Figure 4 C, in the present embodiment, each second prism structure 164 is between wantonly two adjacent the first prism structures 162, and the quantity of the second prism structure 164 between wantonly two adjacent the first prism structures 162, is by the second side 160b of substrate 160 towards the first side 160a decrescence.The blooming piece 16c of the present embodiment, by making the quantity between wantonly two adjacent the first prism structures 162 cumulative towards the second side 160b by the first side 160a of substrate 160, the means as the light that makes to be penetrated by blooming piece 16c with more level and smooth taste, its visual effect that can reach is similar to the degree of fluctuation that makes the first prism structure 162 from the first incidence surface 100a that is close to light guide plate 10 toward away from the first incidence surface 100a practice decrescence.
Please refer to Fig. 5.Fig. 5 is the side view illustrating according to the backlight module 3 of another embodiment of the present invention.
As shown in Figure 5, in the present embodiment, backlight module 3, except comprising equally light guide plate 10, a plurality of the first light emitting diode 12, diffusion sheet 14 and blooming piece 16d, also comprises a plurality of the second light emitting diodes 18.In addition, the light guide plate 10 of backlight module 3, except having the first incidence surface 100a and exiting surface 100b, also comprises the second incidence surface 100c.The first incidence surface 100a and the second incidence surface 100c of light guide plate 10 are connected with exiting surface 100b respectively.The first light emitting diode 12 of backlight module 3 is flatly arranged along the first incidence surface 100a of light guide plate 10, and the second light emitting diode 18 is flatly arranged along the second incidence surface 100c of light guide plate 10.Because Fig. 5 is the side view of backlight module 3 of the present invention, therefore first light emitting diode 12 and second light emitting diode 18 are only shown.Whereby, after the light of launching at the first light emitting diode 12 and second light emitting diode 18 of backlight module 3 enters light guide plate 10 by the first incidence surface 100a and the second incidence surface 100c respectively, light can be positioned at immediately Christmas tree pattern 102 reflections of light guide plate 10 bottoms and leave light guide plate 10 by exiting surface 100b, and sequentially by diffusion sheet 14, leaves backlight module 3 with blooming piece 16d.
Please refer to Fig. 6 A.Fig. 6 A is the vertical view that the blooming piece 16d in Fig. 5 is shown.
As shown in Figure 6A, in the present embodiment, due to the first incidence surface 100a of the first light emitting diode 12 over against light guide plate 10, and the second light emitting diode 18 is over against the second incidence surface 100c of light guide plate 10, and the hot spot phenomenon that therefore the first light emitting diode 12 and the second light emitting diode 18 cause can betide respectively the first incidence surface 100a and the second incidence surface 100c part of contiguous light guide plate 10.By make to be close to most light guide plate 10 the first incidence surface 100a (that is, the first side 160a of substrate 160) with the second incidence surface 100c (that is, the second side 160b of substrate 160) the first prism structure 162 has maximum degree of fluctuation (can make the first prism structure 162 have the shortest mean wavelength Wm or maximum average amplitude Am), and the degree of fluctuation that makes the first prism structure 162 respectively by the first incidence surface 100a of contiguous light guide plate 10 and the second incidence surface 100c towards the center line C of substrate 160 decrescence, except the hot spot phenomenon can be effectively the first light emitting diode 12 and the second light emitting diode 18 being caused produces atomizing effect and not obvious, also can make the light being penetrated by blooming piece 16d there is continuous taste.
Please refer to Fig. 6 B.Fig. 6 B is the vertical view that another embodiment of the blooming piece 16d in Fig. 6 A is shown.
As shown in Figure 6B, in the present embodiment, each second prism structure 164 is between wantonly two adjacent the first prism structures 162, and the quantity of the second prism structure 164 between wantonly two adjacent the 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 the present embodiment, by making the quantity between wantonly two adjacent the first prism structures 162 cumulative towards center line C by the first side 160a and the second side 160b of substrate 160 respectively, the means as the light that makes to be penetrated by blooming piece 16e with more level and smooth taste, its visual effect that can reach be similar to make the first prism structure 162 degree of fluctuation respectively by the first incidence surface 100a of contiguous light guide plate 10 and the second incidence surface 100c towards the center line C of substrate 160 practice decrescence.
Please refer to Fig. 7 and Fig. 8 A.Fig. 7 is the side view that another embodiment of blooming piece 16a in Fig. 1 one first prism structure 162 is wherein shown.Fig. 8 A is the vertical view that an embodiment of the blooming piece 16a in Fig. 2 is shown, and it adopts the first prism structure 362 in Fig. 7.
As shown in Fig. 7 and Fig. 8 A, the present embodiment is to improve for the blooming piece 16a in Fig. 1, particularly for the first prism structure 162 of blooming piece 16a.In the present embodiment, blooming piece 36a comprises substrate 160 equally.The first prism structure 362 of blooming piece 36a extends along the orientation of the 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 region of contiguous light emitting diode 12 can be greater than the diffusion away from first prism structure 362 in the region of light emitting diode 12.In the present embodiment, blooming piece 36a comprises a plurality of micro-diffusion structure 362a.Micro-diffusion structure 362a of blooming piece 36a is arranged on the surface of the first prism structure 362, causes each first prism structure 362 to have light diffusion.In the present embodiment, in order to adjust the means of the diffusion of the first prism structure 362, can reach by changing the light diffusion of the first prism structure 362.The light diffusion of the first prism structure 362 by the first side 160a towards the second side 160b decrescence (that is, from the first incidence surface 100a of contiguous light guide plate 10 toward away from the first incidence surface 100a decrescence).
As shown in Figure 7, in the present embodiment, each micro-diffusion structure 362a has projecting height S.The surface that projecting height S may be defined as each micro-diffusion structure 362a distance the first prism structure 362 vertical height farthest.In the formed a plurality of micro-diffusion structure 362a of the first prism structure 362, each micro-diffusion structure 362a has specific projecting height S, and the specific projecting height S of a plurality of micro-diffusion structure 362a on same the first prism structure 362 is obtained after mean value, be the average projecting height Sm of the micro-diffusion structure 362a on this first prism structure 362.In other words, the light diffusion of each the first prism structure 362 reduces with the average projecting height Sm of micro-diffusion structure 362a separately.In other words, if the micro-diffusion structure 362a on the first prism structure 362 has larger average projecting height Sm, larger except representing the size of micro-diffusion structure 362a, also represent that the first prism structure 362 has larger light diffusivity.Due to the first incidence surface 100a of the first light emitting diode 12 over against light guide plate 10, the hot spot phenomenon that therefore the first light emitting diode 12 causes can betide the first incidence surface 100a part of contiguous light guide plate 10.By make to be close to most light guide plate 10 the first incidence surface 100a (that is, the first side 160a of substrate 160) the micro-diffusion structure 362a on the first prism structure 362 has maximum average projecting height Sm, and the average projecting height Sm that makes micro-diffusion structure 362a from the first incidence surface 100a that is close to light guide plate 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 effectively cause the first light emitting diode 12 produces atomizing effect and not obvious, also can make the light being penetrated by blooming piece 36a there is continuous taste.
Be shown in equally Fig. 7, in the present embodiment, the first prism structure 362 has vertical height V2.For fear of the first prism structure 362, because light diffusion is excessive, cause the taste of the light that blooming piece 36a penetrates not good, the average projecting height Sm of each micro-diffusion structure 362a be preferably less than the first prism structure 362 vertical height V2 80%, and then focus is reached the effect of atomization, and the light that blooming piece 36a is penetrated has preferably taste simultaneously.
Be shown in equally Fig. 8 A, in the present embodiment, be positioned at the average projecting height Sm of the micro-diffusion structure 362a on the first prism structure 362 of substrate 160 first side 160a, be substantially the first prism structure 362 that is positioned at substrate 160 center line C micro-diffusion structure 362a average projecting height Sm 10%～50%, that is the average projecting height Sm that is positioned at the micro-diffusion structure 362a of the first side 160a (the first incidence surface 100a) is greater than the micro-diffusion structure 362a that is positioned at center line C.Because the light diffusion of micro-diffusion structure 362a is from the first incidence surface 100a that is close to light guide plate 10 toward comparatively relaxing away from the first incidence surface 100a gradient decrescence, therefore user, observing the light time of being penetrated by blooming piece 36a, can feel that light has more level and smooth taste.In addition, for convenience of description, this instructions only illustrates the relation of average projecting height Sm and distribution situation to have micro-diffusion structure 362a of same particle size in same prism structure, so the invention is not restricted to this, in same the first prism structure 362, can there is micro-diffusion structure 362a of different-grain diameter to form average projecting height Sm.
Please refer to Fig. 8 B.Fig. 8 B is the vertical view that another embodiment of the blooming piece 36a in Fig. 8 A is shown.
As shown in Figure 8 B, in the present embodiment, if the taste impact of the light diffusion of the first prism structure 362 from the first incidence surface 100a that is close to light guide plate 10 toward the light penetrating for blooming piece 36b away from the first incidence surface 100a gradient is decrescence significantly time, the first prism structure 362 of blooming piece 36b also can concentrate between the first side 160a and center line C of substrate 160.In other words, the average projecting height Sm that is positioned at the micro-diffusion structure 362a of the first side 160a (the first incidence surface 100a) is greater than the micro-diffusion structure 362a that is positioned at center line C, and the prism structure that is positioned at center line C can not have micro-diffusion structure 362a.Whereby, there is the blooming piece 36b of less the first prism structure 362 quantity, on manufacturing, there is easy processing, and the fine ratio of product of blooming piece 36b also can obtain lifting.
As shown in Figure 8 A and 8 B, blooming piece 36a and blooming piece 36b, except substrate 160 and the first prism structure 362, comprise a plurality of the second prism structures 164 equally.The second prism structure 164 is arranged in substrate 160.Each second prism structure 164 has smooth surface.In other words, the second prism structure 164 does not have micro-diffusion particle or other can have the microstructure of atomizing functions.Because the smooth surface of the second prism structure 164 does not have the function of the hot spot phenomenon that atomization the first light emitting diode 12 causes, therefore the second prism structure 164 can be arranged towards the first side 160a of contiguous the first light emitting diode 12 by the second side 160b away from the first light emitting diode 12 by substrate 160.
Please refer to Fig. 8 C.Fig. 8 C is the vertical view that another embodiment of the blooming piece 36a in Fig. 8 A is shown.
As shown in Figure 8 C, in the present embodiment, each second prism structure 164 is between wantonly two adjacent the first prism structures 362, and the quantity of the second prism structure 164 between wantonly two adjacent the first prism structures 362, is by the second side 160b of substrate 160 towards the first side 160a decrescence.In the present embodiment, the average projecting height Sm of the prism structure in close the first incidence surface 100a region is greater than other regions or center line C, this average projecting height Sm may be interpreted as many first prism structures 362 (being in region) and forms and obtain, non-single the first prism structure 362, that is average projecting height Sm is along with each region distance the first incidence surface 100a is far away and successively decrease.The blooming piece 36c of the present embodiment, by making the quantity between wantonly two adjacent the first prism structures 362 cumulative towards the second side 160b by the first side 160a of substrate 160, the means as the light that makes to be penetrated by blooming piece 36c with more level and smooth taste, its visual effect that can reach is similar to the light diffusion that makes the first prism structure 362 from the first incidence surface 100a that is close to light guide plate 10 toward away from the first incidence surface 100a practice decrescence.
Please refer to Fig. 8 D.Fig. 8 D is the vertical view that another embodiment of the blooming piece 36a in Fig. 8 A is shown.
As shown in Fig. 8 D, the blooming piece 36d of the present embodiment is suitable for being applied to the backlight module 3 that Fig. 5 comprises the first light emitting diode 12 and the second light emitting diode 18.Due to the first incidence surface 100a of the first light emitting diode 12 over against light guide plate 10, and the second light emitting diode 18 is over against the second incidence surface 100c of light guide plate 10, and the hot spot phenomenon that therefore the first light emitting diode 12 and the second light emitting diode 18 cause can betide respectively the first incidence surface 100a and the second incidence surface 100c part of contiguous light guide plate 10.By make to be close to most light guide plate 10 the first incidence surface 100a (that is, the first side 160a of substrate 160) with the second incidence surface 100c (that is, the second side 160b of substrate 160) the first prism structure 362 has maximum light diffusion (making micro-diffusion structure 362a have maximum average projecting height Sm), and the light diffusion that makes the first prism structure 362 respectively by the first incidence surface 100a of contiguous light guide plate 10 and the second incidence surface 100c towards the center line C of substrate 160 decrescence, except the hot spot phenomenon can be effectively the first light emitting diode 12 and the second light emitting diode 18 being caused produces atomizing effect and not obvious, also can make the light being penetrated by blooming piece 36d there is continuous taste.
Please refer to Fig. 8 E.Fig. 8 E is the vertical view that another embodiment of the blooming piece 36a in Fig. 8 A is shown.
As shown in Fig. 8 E, in the present embodiment, each second prism structure 164 is between wantonly two adjacent the first prism structures 362, and the quantity of the second prism structure 164 between wantonly two adjacent the 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 the present embodiment, by making the quantity between wantonly two adjacent the first prism structures 362 cumulative towards center line C by the first side 160a and the second side 160b of substrate 160 respectively, the means as the light that makes to be penetrated by blooming piece 36e with more level and smooth taste, its visual effect that can reach be similar to make the first prism structure 362 light diffusion respectively by the first incidence surface 100a of contiguous light guide plate 10 and the second incidence surface 100c towards the center line C of substrate 160 practice decrescence.
Please refer to Fig. 9 A.Fig. 9 A is the vertical view that another embodiment of the blooming piece 36a in Fig. 8 A is shown.
As shown in Figure 9 A, in the present embodiment, on each first prism structure 562, adopt micro-diffusion structure 562a of same particle diameter, and the micro-diffusion structure 562a on each first prism structure 562 has average density.Average density may be defined as the quantity of micro-diffusion structure 562a included in unit area.The light diffusion of each the first prism structure 562 reduces with the average density of micro-diffusion structure 562a separately.In other words, if the micro-diffusion structure 562a on the first prism structure 562 has larger average density, represent that the first prism structure 562 has larger light diffusivity.Due to the first incidence surface 100a of the first light emitting diode 12 over against light guide plate 10, the hot spot phenomenon that therefore the first light emitting diode 12 causes can betide the first incidence surface 100a part of contiguous light guide plate 10.By make to be close to most light guide plate 10 the first incidence surface 100a (that is, the first side 160a of substrate 160) the micro-diffusion structure 562a on the first prism structure 562 has maximum average density, and the average density that makes micro-diffusion structure 562a from the first incidence surface 100a that is close to light guide plate 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 effectively cause the first light emitting diode 12 produces atomizing effect and not obvious, also can make the light being penetrated by blooming piece 56a there is continuous taste.
Be shown in equally Fig. 9 A, in the present embodiment, be positioned at the average density of the micro-diffusion structure 562a on the first prism structure 562 of substrate 160 first side 160a, be substantially the first prism structure 562 that is positioned at substrate 160 center line C micro-diffusion structure 562a average density 10%～50%, that is the average density that is positioned at micro-diffusion structure 562a in the first side 160a region is greater than the micro-diffusion structure 562a that is positioned at center line C region.Because the light diffusion of micro-diffusion structure 562a is from the first incidence surface 100a that is close to light guide plate 10 toward comparatively relaxing away from the first incidence surface 100a gradient decrescence, therefore user, observing the light time of being penetrated by blooming piece 56a, can feel that light has more level and smooth taste.
Please refer to Fig. 9 B.Fig. 9 B is the vertical view that another embodiment of the blooming piece 56a in Fig. 9 A is shown.
As shown in Figure 9 B, in the present embodiment, if the taste impact of the light diffusion of the first prism structure 562 from the first incidence surface 100a that is close to light guide plate 10 toward the light penetrating for blooming piece 56b away from the first incidence surface 100a gradient is decrescence significantly time, the first prism structure 562 of blooming piece 56b also can concentrate between the first side 160a and center line C of substrate 160.Whereby, there is the blooming piece 56b of less the first prism structure 562 quantity, on manufacturing, there is easy processing, and the fine ratio of product of blooming piece 56b also can obtain lifting.
As shown in Fig. 9 A and Fig. 9 B, blooming piece 56a and blooming piece 56b, except substrate 160 and the first prism structure 562, comprise a plurality of the second prism structures 164 equally.The second prism structure 164 is arranged in substrate 160.Each second prism structure 164 has smooth surface.Because the smooth surface of the second prism structure 164 does not have the function of the hot spot phenomenon that atomization the first light emitting diode 12 causes, therefore the second prism structure 164 can be arranged towards the first side 160a of contiguous the first light emitting diode 12 by the second side 160b away from the first light emitting diode 12 by substrate 160.
Please refer to Fig. 9 C.Fig. 9 C is the vertical view that another embodiment of the blooming piece 56a in Fig. 9 A is shown.
As shown in Figure 9 C, in the present embodiment, each second prism structure 164 is between wantonly two adjacent the first prism structures 562, and the quantity of the second prism structure 164 between wantonly two adjacent the first prism structures 562, is by the second side 160b of substrate 160 towards the first side 160a decrescence.In the present embodiment, the average density of first prism structure 562 in close the first incidence surface 100a region is greater than other regions or center line C, this average density may be interpreted as many first prism structures 562 (being in region) and forms and obtain, non-single the first prism structure 562, that is average density is along with each region distance the first incidence surface 100a is far away and successively decrease.The blooming piece 56c of the present embodiment, by making the quantity between wantonly two adjacent the first prism structures 562 cumulative towards the second side 160b by the first side 160a of substrate 160, the means as the light that makes to be penetrated by blooming piece 56c with more level and smooth taste, its visual effect that can reach is similar to the light diffusion that makes the first prism structure 562 from the first incidence surface 100a that is close to light guide plate 10 toward away from the first incidence surface 100a practice decrescence.
Please refer to Fig. 9 D.Fig. 9 D is the vertical view that another embodiment of the blooming piece 56a in Fig. 9 A is shown.
As shown in Fig. 9 D, the blooming piece 56d of the present embodiment is suitable for being applied to the backlight module 3 that Fig. 5 comprises the first light emitting diode 12 and the second light emitting diode 18.Due to the first incidence surface 100a of the first light emitting diode 12 over against light guide plate 10, and the second light emitting diode 18 is over against the second incidence surface 100c of light guide plate 10, and the hot spot phenomenon that therefore the first light emitting diode 12 and the second light emitting diode 18 cause can betide respectively the first incidence surface 100a and the second incidence surface 100c part of contiguous light guide plate 10.By make to be close to most light guide plate 10 the first incidence surface 100a (that is, the first side 160a of substrate 160) with the second incidence surface 100c (that is, the second side 160b of substrate 160) the first prism structure 562 has maximum light diffusion (making micro-diffusion structure 562a have maximum average density), and the light diffusion that makes the first prism structure 562 respectively by the first incidence surface 100a of contiguous light guide plate 10 and the second incidence surface 100c towards the center line C of substrate 160 decrescence, except the hot spot phenomenon can be effectively the first light emitting diode 12 and the second light emitting diode 18 being caused produces atomizing effect and not obvious, also can make the light being penetrated by blooming piece 56d there is continuous taste.
Please refer to Fig. 9 E.Fig. 9 E is the vertical view that another embodiment of the blooming piece 56a in Fig. 9 A is shown.
As shown in Fig. 9 E, in the present embodiment, each second prism structure 164 is between wantonly two adjacent the first prism structures 562, and the quantity of the second prism structure 164 between wantonly two adjacent the 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 the present embodiment, by making the quantity between wantonly two adjacent the first prism structures 562 cumulative towards center line C by the first side 160a and the second side 160b of substrate 160 respectively, the means as the light that makes to be penetrated by blooming piece 56e with more level and smooth taste, its visual effect that can reach be similar to make the first prism structure 562 light diffusion respectively by the first incidence surface 100a of contiguous light guide plate 10 and the second incidence surface 100c towards the center line C of substrate 160 practice decrescence.
In an embodiment, micro-diffusion structure 362a, 562a on the first prism structure 362,562 can be ball-shaped or multiangular, but not as limit.
In an embodiment, in order to produce respectively micro-diffusion structure 362a, 562a on the first prism structure 362,562 in Fig. 7 to Fig. 9 E, on the surface that can take turns in fabrication tool-processing of blooming piece 36a～56e, carry out blasting craft, and can adopt circular sand material or polygonal molding sand material in response to the shape of required micro-diffusion structure 362a, 562a, so as to produce first prism structure 362,562 respectively with micro-diffusion structure 362a, 562a in substrate 160 after transfer printing.Or, also can on the surface of processing wheel, carry out laser engraving technique, can after transfer printing, in substrate 160, produce respectively first prism structure 362,562 with micro-diffusion structure 362a, 562a equally.
By the above detailed description for specific embodiments of the invention, can find out significantly, blooming piece of the present invention is mainly by controlling the face mist degree distribution situation of blooming piece, and then adjust the center briliancy of blooming piece and the mist degree at focus edge, make blooming piece can have the function of diffusion and light harvesting effect concurrently simultaneously.Therefore, blooming piece proposed by the invention can make the center brightness of whole backlight module can keep original due briliancy in the situation that not affecting briliancy, and the hot spot phenomenon producing for light emitting diode can reach significant atomizing effect again simultaneously.In addition, backlight module of the present invention is mainly by adopt the present invention can have the blooming piece of diffusion and light harvesting function concurrently simultaneously, and then can save and additionally add the conventional practice of diffusion sheet on one and reach the object reducing costs.In other words, backlight module proposed by the invention does not need to use diffusion sheet, so the backlight module that adopts traditional multi-layer optical membrane framework can reduce the stacking quantity of blooming piece, except avoiding producing the scratching of scraping between blooming piece, also can reduce the built-up time of blooming piece and the integral thickness of backlight module.
Although the present invention with embodiment openly as above; so it is not in order to limit the present invention; any those of ordinary skills; without departing from the spirit and scope of the present invention; when being used for a variety of modifications and variations, so the scope that protection scope of the present invention ought define depending on appended claim is as the criterion.
Claims (8)
1. a blooming piece, comprising:
One substrate, has two relative the first side and the second sides; And
A plurality of the first prism structures, are arranged in this substrate, and are arranged towards this second side by this first side, and each in described a plurality of the first prism structures has a crooked crest, and this bending crest has a degree of fluctuation;
The described degree of fluctuation of wherein said a plurality of the first prism structures by this first side towards this second side decrescence, makes the light diffusion of described a plurality of the first prism structures by this first side towards this second side decrescence;
Each in wherein said crooked crest has two-end-point, the described end points of each in described crooked crest defines an average line, this relatively corresponding average line of each in described crooked crest forms a plurality of ripples, described a plurality of ripples of each in described crooked crest have a mean wavelength, and each in described degree of fluctuation reduces with this mean wavelength increase of correspondence;
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%.
2. a blooming piece, comprising:
One substrate, has two relative the first side and the second sides; And
A plurality of the first prism structures, are arranged in this substrate, and are arranged towards this second side by this first side, and each in described a plurality of the first prism structures has a crooked crest, and this bending crest has a degree of fluctuation;
The described degree of fluctuation of wherein said a plurality of the first prism structures by this first side towards this second side decrescence, makes the light diffusion of described a plurality of the first prism structures by this first side towards this second side decrescence;
Each in wherein said crooked crest has two-end-point, the described end points of each in described crooked crest defines an average line, this relatively corresponding average line of each in described crooked crest forms a plurality of ripples, described a plurality of ripples of each in described crooked crest have an average amplitude, and each in described degree of fluctuation increases with this average amplitude of correspondence;
Each structure in wherein said a plurality of the first prism has an average vertical height, described average amplitude is less than 20% of this average vertical height, or each in described a plurality of the first prism structure has an average level width, and described average amplitude is less than 20% of this average level width.
3. blooming piece as described in claim 2, 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 described a plurality of the first prism structures are between this first side and this center line.
4. a blooming piece, comprising:
One substrate, has two relative the first side and the second sides; And
A plurality of the first prism structures, are arranged in this substrate, and are arranged towards this second side by this first side, and each in described a plurality of the first prism structures has a crooked crest, and this bending crest has a degree of fluctuation;
The described degree of fluctuation of wherein said a plurality of the first prism structures by this first side towards this second side decrescence, makes the light diffusion of described a plurality of the first prism structures by this first side towards this second side decrescence;
Each in wherein said crooked crest has two-end-point, the described end points of each in described crooked crest defines an average line, this relatively corresponding average line of each in described crooked crest forms a plurality of ripples, described a plurality of ripples of each in described crooked crest have an average amplitude, and each in described degree of fluctuation increases with this average amplitude of correspondence;
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 amplitude of this first prism structure of this center line, be substantially this first prism structure that is positioned at this first side this average amplitude 10%～50%.
5. the blooming piece described in claim 1 or 4, further comprise a plurality of the second prism structures, be arranged in this substrate, each in described a plurality of the second prism structure has a straight crest, each in described a plurality of the second prism structure is between wantonly two adjacent described a plurality of the first prism structures, and the quantity of described a plurality of the second prism structure between wantonly two adjacent described a plurality of the first prism structures is by this second side towards this first side decrescence.
6. blooming piece as claimed in claim 5, 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 described a plurality of the second prism structures are between this second side and this center line.
7. a backlight module, comprising:
One light guide plate, has one first incidence surface and an exiting surface, and wherein this first incidence surface is connected with this exiting surface;
A plurality of the first light emitting diodes, arrange along this first incidence surface;
One diffusion sheet, is arranged on this exiting surface; And
One blooming piece, comprising:
One substrate, is arranged on this diffusion sheet; And
A plurality of the first prism structures, be arranged in this substrate, and extend along the orientation of described a plurality of the first light emitting diodes, wherein the light diffusion of described a plurality of first prism structures in the region of contiguous described light emitting diode can be greater than the light diffusion away from first prism structure in the region of described light emitting diode;
Each in described a plurality of the first prism structure has a crooked crest, and this bending crest has a degree of fluctuation;
By the region that is close to described light emitting diode towards the region away from described light emitting diode decrescence, the light diffusion that makes described a plurality of the first prism structures by the region that is close to described light emitting diode towards the region away from described light emitting diode decrescence for the described degree of fluctuation of wherein said a plurality of the first prism structures;
Each in wherein said crooked crest has two-end-point, the described end points of each in described crooked crest defines an average line, this relatively corresponding average line of each in described crooked crest forms a plurality of ripples, described a plurality of ripples of each in described crooked crest have a mean wavelength, and each in described degree of fluctuation reduces with this mean wavelength increase of correspondence;
Wherein the central authorities of this substrate have a center line, this center line is between first side and the second side of this substrate, this first side is a side of contiguous described light emitting diode in this substrate, this second side is away from a side of described light emitting diode in this substrate, be positioned at the mean wavelength of the first prism structure of this first side, be substantially the first prism structure that is positioned at this center line mean wavelength 10%～50%.
8. backlight module as claimed in claim 7, one of them of wherein said a plurality of the first prism structures has curvilinear corner angle staff, 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 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410812362.0A Division CN104460113B (en) | 2011-10-04 | 2011-11-11 | Optical film and backlight module using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102364239A CN102364239A (en) | 2012-02-29 |
| CN102364239B true CN102364239B (en) | 2014-11-26 |
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| 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 |
| CN201110364794.6A Expired - Fee Related CN102364239B (en) | 2011-10-04 | 2011-11-11 | Optical film and backlight module using same |
Family Applications Before (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) | CN104460113B (en) |
| TW (1) | TWI459043B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102830460B (en) * | 2012-08-06 | 2017-02-15 | 北京京东方光电科技有限公司 | 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 |
| 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 |
| 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 |
| 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 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Family Cites Families (8)
| 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 |
| WO2003077018A1 (en) * | 2002-03-14 | 2003-09-18 | 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 |
| CN1853068A (en) * | 2003-09-19 | 2006-10-25 | 索尼株式会社 | Backlight device and liquid crystal display |
| US20070121227A1 (en) * | 2004-07-02 | 2007-05-31 | Efun Technology Co., Ltd. | Brightness enhancement film having curved prism units and light scattering particles |
| 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 CN201410812362.0A patent/CN104460113B/en not_active Expired - Fee Related
- 2011-11-11 CN CN201110364794.6A patent/CN102364239B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201316043A (en) | 2013-04-16 |
| CN102364239A (en) | 2012-02-29 |
| CN104460113A (en) | 2015-03-25 |
| TWI459043B (en) | 2014-11-01 |
| CN104460113B (en) | 2018-02-13 |
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