CN106569360A - Light guide sheet, backlight apparatus and liquid crystal display apparatus - Google Patents
Light guide sheet, backlight apparatus and liquid crystal display apparatus Download PDFInfo
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- CN106569360A CN106569360A CN201510651506.3A CN201510651506A CN106569360A CN 106569360 A CN106569360 A CN 106569360A CN 201510651506 A CN201510651506 A CN 201510651506A CN 106569360 A CN106569360 A CN 106569360A
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- guide sheet
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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
- G02F1/133524—Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides
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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
- G02F1/133553—Reflecting elements
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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
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
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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
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
- G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention discloses a light guide sheet. The light guide sheet is used in a sidelight type backlight apparatus. The light guide sheet is characterized in that a structural layer of the light guide sheet is provided with a plurality of recessed microstructures which are lower than the flat surface of the structural layer, and a plurality of bulged microstructures which are higher than the flat surface of the structural layer. The light guide sheet improves the shielding property of the foreign matter, the stains and other flaws between the light guide sheet and a reflective film, so that the qualified rate of assembling for a backlight module group is improved. Besides, the light guide sheet avoids generation of interference fringe between the flat surface of the structural layer and the smooth surface of the reflective film, and can improve the light source and the grade of display frame.
Description
Technical field
The present invention relates to light guide sheet, in particular to a kind of light guide sheet in side light type backlight source device, the backlight arrangement comprising the light guide sheet, and the liquid crystal indicator comprising the backlight arrangement.
Background technology
In a liquid crystal display, light guide sheet is indispensable optical element in side light type backlight source device.In this kind of backlight, by the effect of the micro-structural that is produced on light guide sheet surface or scattering point, and under the auxiliary of neighbouring light guide sheet backside reflection piece, light guide sheet makes the light from its side, is changed into the area source of the back side illuminaton to liquid crystal display cells.
Fig. 1 shows the arrangement of light guide sheet and reflectance coating in prior art backlight module.In the module, the LED/light source side installed in the light inputting end of light guide sheet 100 (not shown).Light guide sheet 100 includes substrate 101 and structure sheaf 102, and multiple concave microstructures 103 are provided with structure sheaf 102.In backlight module, using the light guide sheet with concave microstructure, the utilization rate of light can be effectively improved.
Structure sheaf 102, by the mask plate containing light blocking pattern, is optionally received energy radiation polymerization and is formed by photopolymerizable material；After unpolymerized photopolymerizable material corresponding with light blocking pattern is removed, space left in the coating forms concave microstructure 103；Flat surfaces 105 of the structure sheaf 102 being thusly-formed comprising larger area.Additionally, reflectance coating 302 is located at the top of light guide sheet 100, its surface 303 directly contacts with the flat surfaces 105 of light guide film structure layer.
This directly contact; cause the screening performance of foreign matter, stain and other flaws to being present between above-mentioned two surface 303,105 poor; the vestige or shade produced by these flaws can be substantially observed in light source exiting surface direction (-Z direction), so as to reduce the packaging qualification rate of backlight module.In addition, if the surface 303 of selected reflectance coating 302 is smooth surface, then the smooth surface is also easy to produce interference fringe with the flat surfaces 105 of light guide film structure layer, thus reduces the taste of light source and display picture.
Therefore, in liquid crystal display and field of LED illumination, a kind of light guide sheet and backlight arrangement are needed badly so that while higher light utilization efficiency, reducing energy consumption is kept, the screening performance to foreign matter can be improved and avoid producing interference fringe between smooth reflectance coating surface.
The content of the invention
For the drawbacks described above of prior art, it is an object of the invention to, a kind of light guide sheet is provided, backlight module is made in the case of light utilization efficiency is preferable, the shielding of the foreign matter to existing between light guide sheet and reflectance coating is improved, and avoids the interference fringe that structure sheaf flat surfaces contact and produce with smooth reflectance coating surface.
According to the first aspect of the invention, there is provided a kind of light guide sheet, for incident light guide sheet in its light inputting end face of light Jing that in side light type backlight source device, light source sends, the light guide sheet includes：Substrate with optical transparent properties；Positioned at the structure sheaf of the substrate surface, formed afterwards by photopolymerizable material is aggregated, the structure sheaf has, multiple concave microstructures less than its flat surfaces, area occupied ratio of the plurality of concave microstructure in structure layer surface, from light inputting end to light end is gone out along light incident direction, from 0.05% to 10% to 5% to 60% increases；Multiple raised micro-structurals higher than the flat surfaces；Also, the surface on the structure sheaf between each micro-structural is the flat surfaces.
In the first aspect, it is preferred that the plurality of raised micro-structural is uniformly distributed on the surface of the structure sheaf.
Preferably, the plurality of raised micro-structural, in the area occupied ratio of structure layer surface, is the numerical value of the half of shared area ratio maximum less than the concave microstructure.
Preferably, the plurality of raised micro-structural structure layer surface area occupied ratio, equal to the area occupied ratio of the minimum concave microstructure.
Preferably, the height of the raised micro-structural is 1 micron to 100 microns.
Preferably, the height of the raised micro-structural is 2 microns to 50 microns.
Preferably, the raised micro-structural, after the transparent membrane of dimpling lens is contained to energy radius optically focused in upper surface or lower surface, irradiates the photopolymerizable material and is formed.
Preferably, the raised micro-structural, after the transparent membrane by upper and lower surface containing dimpling lens is to energy radius optically focused, irradiates the photopolymerizable material and is formed.
According to second aspect, there is provided the light guide sheet in a kind of backlight arrangement, including above-mentioned first aspect；In the light source that the light inputting end face of the neighbouring light guide sheet configures；And reflectance coating, positioned at the raised micro-structural side of the light guide film structure layer, its surface contacts with the raised micro-structural.
According to the third aspect, there is provided a kind of backlight arrangement in liquid crystal indicator, including above-mentioned second aspect, the backlight arrangement is configured at the back side of liquid crystal display cells.
According to the present invention, light guide sheet has concave microstructure and raised micro-structural, contact with reflectance coating in backlight module convexity Ultrastructure, so, between light guide sheet and reflectance coating, the distance determined by raised microstructure height just it has been separated by, has which thereby enhanced the shielding of the foreign matter, stain and other flaws to being present between light guide sheet and reflectance coating, so as to improves the packaging qualification rate of backlight module.Also, present invention, avoiding the generation of interference fringe between structure sheaf flat surfaces and smooth reflectance coating surface, it is possible to increase the taste of light source and display picture.
Description of the drawings
Fig. 1 shows the arrangement of light guide sheet and reflectance coating in prior art backlight module；
Fig. 2 shows the light guide sheet of one embodiment of the invention；
Fig. 3 a are sectional view of the light guide sheet in XZ planes in Fig. 2 examples；
Fig. 3 b show communication process of the incident ray in example light guide sheet；
Fig. 4 shows the arrangement of light guide sheet and reflectance coating in backlight module of the present invention；
Fig. 5 a are SEM image of the example light guide sheet near light inputting end structure layer surface；
Fig. 5 b are example light guide sheet near the SEM image for going out light end structure layer surface；
Fig. 6 shows the example preparation method of light guide sheet of the present invention；
Fig. 7 shows the transparent membrane containing dimpling lens；
Fig. 8 is illustrated for the amplification of Fig. 6 subregions；
Fig. 9 shows another example preparation method of light guide sheet of the present invention；
Figure 10 a are the solidification form example formed in photopolymerizable material coating after chosen performance amount radiation；
Figure 10 b are to remove the light guide sheet ultimately formed after uncured portion；
Figure 11 is the backlight module example comprising light guide sheet of the present invention.
Specific embodiment
To more fully understand the present invention, the invention will be further described hereafter to combine accompanying drawing with embodiment.In accompanying drawing, identical mark represents same part or structure.
With reference to Fig. 2, Fig. 2 shows the light guide sheet of one embodiment of the invention.The light guide sheet is including substrate 201, positioned at the structure sheaf 202 on the surface of substrate 201.Wherein, substrate 201 adopts optically transparent material, for example, can be using materials such as polymethyl methacrylate (PMMA), poly- phthalate ester (PC), glass.Structure sheaf 202 is formed afterwards by photopolymerizable material is aggregated.
Structure sheaf 202 is comprising multiple concave microstructures 203 less than its flat surfaces 205, multiple raised micro-structurals 204 higher than the flat surfaces 205 and be recessed and flat surfaces 205 that projection micro-structural is occupied.
Raised micro-structural 204 is swelled relative to structure sheaf flat surfaces 205 to +Z direction, is contacted with reflectance coating in backlight module convexity Ultrastructure 204, so, between structure sheaf flat surfaces 205 and reflectance coating, has just been separated by the distance determined by raised microstructure height.In example light guide sheet, the surface of substrate 201 and structure sheaf flat surfaces 205 are parallel with X/Y plane.
Fig. 3 a are sectional view of the light guide sheet in XZ planes in Fig. 2 examples.As shown in Figure 3 a, the basic size height in hand H and diameter D of concave microstructure 203 is describing.Here, height H is the distance of the lowest point of concave microstructure 203 to flat surfaces 205.Preferably, height H is 1～150 micron；More preferably 2～50 microns.Diameter D is preferably 2～250 microns, more preferably 5～100 microns.It is worthy of note that, the basic size of concave microstructure selects diameter D in the present invention, it is intended merely to the convenience that describes and clear, it is not meant to that section of the concave microstructure on X/Y plane is only limitted to circle, other are suitable for the section of concave microstructure such as the shape of rectangle, ellipse, hexagon etc.In the case where the cross sectional shape of concave microstructure 203 is not circle, the diameter D is the minimum dimension of the cross sectional shape, such as the minor face of rectangle, oval short axle.
In Fig. 3 a, 206 represent the light inputting end face of light guide sheet, and 207 represent its light output end, and LED/light source is positioned over the side in neighbouring light inputting end face 206.The density of concave microstructure 203 gradually increases in X direction.Specifically, multiple concave microstructures 203 structure layer surface area occupied ratio (the base area summation proportion of unit area sunken inside micro-structural in structure sheaf), along light incident direction, 0 from neighbouring light inputting end face 206.05% to 10%, gradually increase to 5% to 60% at neighbouring light output end 207.
It may be noted that the density of concave microstructure gradually increases in X direction, a kind of general trend is referred to.Reflect and be again introduced into the impact of the light of light guide sheet along -X direction adjacent to backlight module frame due to reflection of the light from light output end 207 to -X direction or from the light Jing of the outgoing of light output end 207, in the position of neighbouring light output end 207, the density of concave microstructure generally needs appropriate amendment.Also, in the less distance range of light output end 207, in fact it could happen that the density of concave microstructure is in X direction in the situation for declining more by a small margin.The amplitude of density revision, and the specific design parameter such as backlight module frame and the distance of light guide sheet light output end is related.
Referring again to Fig. 3 a, similarly, the basic size of raised micro-structural 204 also can be described with its height h and diameter d.Height h is the highest point of raised micro-structural 204 with a distance from flat surfaces 205, it is preferable that height h is 1～100 micron；H is more preferably 2～50 microns.Diameter d is to describe flat shape ∑ of the raised micro-structural 204 on the flat surfaces parallel with X/Y plane.Flat shape ∑ can be circle, or for other shapes, such as rectangle, ellipse, hexagon.In the case where flat shape ∑ is not circle, diameter d is the minimum dimension of the shape, such as the minor face of rectangle, oval short axle.Diameter d is preferably 1～200 micron, more preferably 2～100 microns.
Area occupied ratio (in the structure sheaf base area summation proportion of unit area convex Ultrastructure) of multiple raised micro-structurals 204 in structure layer surface, light inputting end face 206 from light guide sheet is to light output end 207, can adopt and be uniformly distributed, or gradually increase in X direction, or be gradually reduced in X direction.Wherein preferably, multiple raised micro-structurals 204 can be made to be distributed evenly in structure layer surface, for example, multiple raised micro-structurals 204 can be made in the area occupied ratio of structure layer surface, be the numerical value of the half of shared area ratio maximum less than above-mentioned concave microstructure.And for example, multiple raised micro-structurals 204 can also be made in the area occupied ratio of structure layer surface, equal to the area occupied ratio of the minimum concave microstructure.Such selection can simplify the design of light guide sheet.
The light of light guide sheet is entered from light inputting end face 206, by the total reflection of substrate surface and structure sheaf flat surfaces 205, is propagated to light output end 207 in X direction.Concave microstructure 203 and raised micro-structural 204 destroy the condition of light total reflection and make light leave light guide sheet in these positions in corresponding position in structure sheaf.As shown in Figure 3 b, the light for being sent from light source 208 enters light guide sheet, A by light inputting end face 2060And B0Represent two example rays for entering light guide sheet.Light A0The flat surfaces 205 of structure sheaf are propagated to, is propagated in light guide sheet by the total reflection of flat surfaces and Air Interface, such as A1It is shown；Light A1The surface of substrate is propagated to, continues to be propagated in light guide sheet by the total reflection of substrate surface and Air Interface, such as A2It is shown；Light A2A raised micro-structural 204 is propagated to, a part for the light is by reflection or scattering, such as one side of directive substrate 201, A3aIt is shown；Another part of the light is by refraction or scatters off light guide sheet, such as A3bIt is shown.Light B0A concave microstructure 203 is then propagated to, a part for the light passes through the reflection or scattering on concave microstructure surface, such as one side of directive substrate 201, B1aIt is shown；Another part of the light passes through the refraction on concave microstructure surface or scatters off light guide sheet, such as B1bIt is shown.
With reference to Fig. 4, Fig. 4 shows the arrangement of light guide sheet and reflectance coating in backlight module of the present invention.The surface 303 of reflectance coating 302 contacts with the raised micro-structural 204 of light guide sheet, and the gap determined by raised microstructure height has been separated by between them so that structure sheaf flat surfaces 205 are with reflectance coating surface 303 without directly contact.According to the present invention, raised micro-structural is formed in light guide film structure layer, the shielding of the foreign matter, stain and other flaws to being present between reflectance coating and light guide sheet is which thereby enhanced, so as to improve the packaging qualification rate of backlight module.Also, in the case where the surface 303 of selected reflectance coating 302 is smooth surface, present invention, avoiding the smooth surface and contact with light guide film structure layer flat surfaces and produce interference fringe.
Scattering, reflection or refraction action that concave microstructure 203 and raised micro-structural 204 are produced to light, make some light leave light guide sheet by the exiting surface 304 of light guide sheet；Or leave light guide sheet from exiting surface 304 through the reflection of reflectance coating 302.It can be seen that, in the present invention, the raised micro-structural of light guide sheet together decides on from exiting surface 304 intensity of the light for leaving light guide sheet with concave microstructure, that is to say, that the outgoing light homogeneity of exiting surface 304 is determined jointly by the Density Distribution of concave microstructure and raised micro-structural.
Fig. 5 a are SEM image of the example light guide sheet near light inputting end structure layer surface.Wherein, 501a is concave microstructure, and 502a is raised micro-structural.Raised micro-structural is tiny convex closure, is distributed in the surface of structure sheaf.Fig. 5 b are example light guide sheet near the SEM image for going out light end structure layer surface.In the figure, 501b is concave microstructure, and 502b is raised micro-structural.Contrast two figures visible, in example light guide sheet, near the concave microstructure density for going out light end the concave microstructure density near light inputting end is significantly higher than.
With reference to Fig. 6, Fig. 6 shows the example preparation method of light guide sheet of the present invention.601 is the optical mask plate containing light blocking pattern corresponding with depression microstructure aspects in light guide sheet and position.601a is mask plate transparent substrates substrate, such as quartz glass, soda-lime glass, Pyrex, or polyester material.601b is to be deposited on substrate base surface, and the light blocking material of transparent substrates substrate surface, such as crome metal, or silver salt emulsion layer are stayed in after mask plate manufacture craft.Light blocking material has the effect that the radiation of the energy such as block ultraviolet, visible ray or electron beam passes through.Light blocking material 601b constitutes light blocking pattern.602 is the transparent membrane that dimpling lens are contained on a kind of surface, and it includes transparent substrate 602a and dimpling lens 602b.Dimpling lens 602b is bulge-structure of the summit higher than transparent substrate 602a, can have regular or irregular surface and bottom shape.603 is light guide sheet substrate, and 604 is the photopolymerizable material coating for being coated on the surface of substrate 603.605 are collimation or the close energy radiation for collimating.
Fig. 7 shows the transparent membrane 602 containing dimpling lens.Substrate 602a has optical transparent properties, and the suitable material as substrate includes polyester (PET), polyethylene (PE), polycarbonate (PC), polymethyl methacrylate (PMMA).However, substrate material is not particularly restricted, any material with optical transparent properties all can be used as substrate material.Dimpling lens 602b is distributed in the surface of substrate 602a, can adopt and be uniformly distributed or other regular or irregular distribution modes.Here, the position of dimpling lens 602b is corresponding with the position of above-mentioned light guide sheet convexity Ultrastructure.
In the transparent membrane shown in Fig. 6 and Fig. 7, dimpling lens 602b surfaces disposed thereon.In the present invention, dimpling lens 602b may be alternatively located at the lower surface of transparent membrane.Or, dimpling lens 602b is all contained on the upper and lower surface of transparent membrane.
Fig. 8 is illustrated for the amplification of Fig. 6 subregions, to describe effect of the energy radiation of transparent membrane 602, mask plate diverse location to photopolymerizable material coating.As shown in Figure 8, energy radius A passes through mask plate substrate 601a, dimpling lens in the light blocking material and transparent membrane that do not have on mask plate because of relevant position, light A does not change the direction of propagation, into light guide sheet substrate 603 and photopolymerizable material coating 604, coating is left after being partially absorbed by photopolymerizable material, shown in such as A '.The material on the close surface of light guide sheet substrate 603 has less solidification threshold value in photopolymerizable material coating 604, has higher solidification threshold value away from the material of substrate surface, close coating and Air Interface.Photopolymerizable material receives to solidify more than the threshold energy radiation required for solidification, and the part for being less than threshold energy radiation will be in its uncured state.
Energy radius B and light C passes through mask plate substrate 601a, but because the light blocking of light blocking material 601b is acted on, it is impossible to travel to and through transparent membrane and enter light guide sheet substrate and photopolymerizable material coating.Therefore, photopolymerizable material corresponding with light blocking material 601b positions is in uncured state.
Energy radius D, light E reach dimpling lens 602b by mask plate substrate 601a and transparent membrane substrate 602a.Light D, light E change its direction of propagation when dimpling lens surface, shown in such as light D, light E '.Dimpling lens 602b serves optically focused effect.With light AA, compare, light DD, light EE ' relevant positions in photopolymerizable material coating there is higher radiation intensity, thus make material solidification thicker in coating 604.In coating corresponding with dimpling lens 602b positions, material solidification is highly more than in coating because receiving AA ' light and the height of cured portion.
Fig. 9 shows another example preparation method of light guide sheet of the present invention.It is that the dimpling lens 902b in transparent membrane 902 is disposed below with the difference of preparation method shown in Fig. 8, after the first convex surfaces Jing dimpling lens 902b of energy radiation of the position change the direction of propagation, enters back into the substrate sections of diaphragm.Identical with the dimpling lens 602b being located at shown in Fig. 6, Fig. 8 above transparent membrane, dimpling lens 902b also plays optically focused effect.Similarly, by light DD ", EE " height of photopolymerizable material that solidified more than the material solidified by light AA ' height.
Figure 10 a are the solidification form example formed in photopolymerizable material coating Jing after the selective energy radiation shown in Fig. 8, Fig. 9.The path of AA ' in light Jing Fig. 8, Fig. 9 of collimation or close collimation, the flat consolidation zone in surface of the formation as shown in 1001 in photopolymerizable material coating.Light B, light C are failed to enter photopolymerizable material coating by light blocking material blocks in mask plate, and the material of relevant position keeps unpolymerized state in coating, as shown at 1002.Light DD ' shown in Fig. 8 and light DD shown in EE ', Fig. 9 " and EE " enhances intensity Jing after the dimpling lens in transparent membrane, the photopolymerizable material 1003 after the raised solidification that relevant position is formed higher than other positions.1004 receive energy radiation and uncured photopolymerizable material for the intensity of energy radiation less than solidification threshold value or fail.
Next, through the washing of solvent or other solution, uncured part 1004 is removed, in substrate.Light guide sheet is ultimately formed on 603, as shown in fig. lob.The light guide sheet includes the flat polymer layer 1001 in raised micro-structural 1003, concave microstructure 1002 and surface.
Figure 11 is the backlight module example comprising light guide sheet of the present invention.As shown in figure 11, light guide sheet 1101 includes raised and depression micro-structural as shown in Figure 2.Light source 1102 (such as LED) is arranged in the side in light guide sheet light inputting end face.Reflectance coating 1103 is positioned over the raised micro-structural side of the structure sheaf of light guide sheet 1101, and its surface contacts with raised micro-structural, and prevents reflectance coating surface with light guide film structure layer flat surfaces from directly contact.Alternatively, 1104 is a diffusion barrier, is positioned over the side of the -Z direction of light guide sheet 1101.1105 is a prism film, plays a part of to strengthen backlight module forward direction brightness.1106 is a composite membrane, the dual-use function with blast and diffusion.
It is clear that invention described herein can have many changes, this change must not believe that deviation the spirit and scope of the present invention.Therefore, all changes that will be apparent to those skilled in the art, are included within the covering scope of appended claims.
Claims (10)
1. a kind of light guide sheet, for its light inputting end face incidence light guide sheet of in side light type backlight source device, light source sends light Jing, the light guide sheet includes：
Substrate with optical transparent properties；
Positioned at the structure sheaf of the substrate surface, formed afterwards by photopolymerizable material is aggregated, the structure sheaf has,
Multiple concave microstructures less than its flat surfaces, in the area occupied ratio of structure layer surface, from light inputting end to light end is gone out along light incident direction, from 0.05% to 10% to 5% to 60% increases the plurality of concave microstructure；
Multiple raised micro-structurals higher than the flat surfaces；Also,
Surface on the structure sheaf between each micro-structural is the flat surfaces.
2. light guide sheet as claimed in claim 1, it is characterised in that the plurality of raised micro-structural is uniformly distributed on the surface of the structure sheaf.
3. light guide sheet as claimed in claim 2, it is characterised in that the plurality of raised micro-structural, in the area occupied ratio of structure layer surface, is the numerical value of the half of shared area ratio maximum less than the concave microstructure.
4. light guide sheet as claimed in claim 3, it is characterised in that the plurality of raised micro-structural structure layer surface area occupied ratio, equal to the area occupied ratio of the minimum concave microstructure.
5. light guide sheet as claimed in claim 1, it is characterised in that the height of the raised micro-structural is 1 micron to 100 microns.
6. light guide sheet as claimed in claim 5, it is characterised in that the height of the raised micro-structural is 2 microns to 50 microns.
7. light guide sheet as claimed in claim 1, it is characterised in that the raised micro-structural, after the transparent membrane of dimpling lens is contained to energy radius optically focused in upper surface or lower surface, irradiates the photopolymerizable material and is formed.
8. light guide sheet as claimed in claim 1, it is characterised in that the raised micro-structural, after the transparent membrane by upper and lower surface containing dimpling lens is to energy radius optically focused, irradiates the photopolymerizable material and is formed.
9. a kind of backlight arrangement, including：
Light guide sheet as any one of claim 1 to 8；
In the light source that the light inputting end face of the neighbouring light guide sheet configures；And
Reflectance coating, positioned at the raised micro-structural side of the light guide film structure layer, its surface contacts with the raised micro-structural.
10. a kind of liquid crystal indicator, it is characterised in that including backlight arrangement as claimed in claim 9, the backlight arrangement is configured at the back side of liquid crystal display cells.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510651506.3A CN106569360A (en) | 2015-10-10 | 2015-10-10 | Light guide sheet, backlight apparatus and liquid crystal display apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510651506.3A CN106569360A (en) | 2015-10-10 | 2015-10-10 | Light guide sheet, backlight apparatus and liquid crystal display apparatus |
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| CN109752786A (en) * | 2017-11-03 | 2019-05-14 | 路志坚 | Light-guide device and backlight arrangement |
| CN110809653A (en) * | 2017-06-29 | 2020-02-18 | Bsh家用电器有限公司 | Clothes care appliance with display element |
| CN111538182A (en) * | 2020-05-18 | 2020-08-14 | 海信视像科技股份有限公司 | Display device |
| WO2021051752A1 (en) * | 2019-09-16 | 2021-03-25 | 神盾股份有限公司 | Backlight module applied to display panel |
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| CN111538182A (en) * | 2020-05-18 | 2020-08-14 | 海信视像科技股份有限公司 | Display device |
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