CN108828708B - A kind of edge-type light guide plate bottom surface network point distribution design method - Google Patents
A kind of edge-type light guide plate bottom surface network point distribution design method Download PDFInfo
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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
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
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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
- G02B6/0065—Manufacturing aspects; Material aspects
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Abstract
The present invention relates to a kind of edge-type light guide plate bottom surface network point distribution design methods, comprising: sets guide-lighting board parameter, LED parameter；Point light source is calculated to the illumination of light guide plate bottom；Secondly, according to the condition of total reflection, linear optical wand light source is fitted to the illumination of light guide plate bottom with integral calculation linear light source to the illumination of light guide plate bottom by point and line；Then by line to face, integration method is reused, calculates single area source to the illumination of light guide plate bottom；Then it is generalized to N number of area source, the site radius size of arbitrary coordinate position is obtained by law of conservation of energy to the illumination of bottom surface of light guide plate according to N number of area source.The present invention can accurately and efficiently calculate the brightness value of certain specific point of light guide plate bottom according to the LED parameter given, the parameter of light guide plate, and realize the distribution of Uniform Illumination light outgoing.
Description
Technical field
The present invention relates to tabula rasa scattering netted dot fields, are specifically related to a kind of edge-type light guide plate bottom surface network point distribution design side
Method.
Background technique
In recent years, LCD technology is gradually replaced since its small product size is frivolous, occupy little space, radiates low advantage
For traditional cathode-ray tube displaying technology, the mainstream of flat panel display product is occupied.Liquid crystal display (LCD) is simultaneously non-active
Light emitting display, needs backlight module to provide illumination for it, and image can just be shown.The effect of backlight module is by point
The light that light source or linear light source issue forms area source required for liquid crystal display by light guide plate (LGP), it determines liquid crystal
The light efficiency, uniformity and color characteristics for showing device are the critical components of backlight module.It can be backlight according to the position of backlight
Mould splits is side entering type and two kinds of straight-down negative.The effect of light guide plate is to guide the propagation and scattering of light, for improving brightness and control
The uniformity of brightness processed, light are totally reflected after entering light guide plate in upper and lower two bottom surfaces, are encountered two-dimentional or three-dimensional when light and are dissipated
When penetrating site, total reflection is destroyed, and light is projected from the light-emitting surface of light guide plate.Light guide plate generally has 3 kinds of structures at present: 1) wedge-shaped
Structure, the light guide plate incident side of the structure with a thickness of 2~3mm, the other end with a thickness of 0.8~1.5mm；2) micro-structure is guide-lighting
The micro-structure of some sawtooth or semicircle is added in plate in light guide plate upper and lower surface；3) diffusion point light guide plate, the light guide plate are made
Site production is printed usually in the way of screen painting, these diffusion points are not absorb by high reflectance and delustering pigment
It is made, it is relatively dredged in the diffusion point distribution density close to light-source conductor thicker part and site is smaller, far from light-source conductor
It is larger that the diffusion point of thin location is distributed closeer and site.The network point distribution of bottom surface of light guide plate determines its positive light distribution, nothing
By being that light guide plate is applied to display or illumination, require that it, with sufficiently high uniformity of illuminance and light efficiency, and determines illumination
The uniformity and light efficiency are also network point distribution.Experiment shows that the shape of bottom surface of light guide plate scattering netted dot influences less light scattering,
And the arrangement rule of site then largely affects the uniformity and brightness of output light.Therefore, the design of light guide plate mesh point
It is one of the key technology of backlight module with arrangement.Currently, existing disclosed method is all that will extend LED light source similar to light
Source carries out simplifying calculating, but this approximate actually bigger to whole influential effect.In order to finally obtain preferable design
As a result, many light guide plate mesh point layout designs still rely on experience, this causes, and design efficiency is low, human interference difference is big.To sum up,
In order to solve this problem, it is necessary to propose a kind of can accurately and efficiently calculate realizes with expansion light source to be that incident side enters
The method of the technical basis and theoretical direction of formula bottom surface of light guide plate net-pont design.
Summary of the invention
In view of this, being used the purpose of the present invention is to provide a kind of edge-type light guide plate bottom surface network point distribution design method
Realize that with expansion light source be incident edge-type light guide plate bottom surface net-pont design can accurately and efficiently calculate.
To achieve the above object, the present invention adopts the following technical scheme:
A kind of edge-type light guide plate bottom surface network point distribution design method, it is characterised in that: the following steps are included:
Step S1: setting LED parameter and guide-lighting board parameter；
Step S2: according to the parameter of setting, LED is considered as point light source, calculates point light source to one line of bottom surface of light guide plate
Illumination；
Step S3: point light source is extended to linear light source, and according to point light source to the luminance calculation of one line of bottom surface of light guide plate
Illumination of the linear light source to bottom surface of light guide plate；
Step S4: linear light source is unfolded in light guide plate by total reflection several times, linear optical wand light is extended to
Source, and according to linear light source to the luminance calculation threadiness optical wand light source of bottom surface of light guide plate to the illumination of bottom surface of light guide plate；
Step S5: linear optical wand light source is extended to area source, and according to linear optical wand light source to the photograph of bottom surface of light guide plate
Degree calculates single area source to the illumination of bottom surface of light guide plate；
Step S6: the LED parameter and leaded light board parameter of setting are substituted into, and according to single area source to the photograph of bottom surface of light guide plate
Degree calculates N number of area source to the illumination of bottom surface of light guide plate；According to N number of area source to the illumination of bottom surface of light guide plate, kept by energy
Constant rule obtains the site radius size of arbitrary coordinate position.
Further, scattering netted dot can be protrusion relative to light guide plate surface, can also be recessed light guide plate, site radius
Size refers to the bottom profile of site contact light guide plate, which is round.
Further, the LED parameter includes the length b, width a, initial direct projection light intensity I of LED0With two LED light
Center spacing lN。
Further, the guide-lighting board parameter includes the length W of light guide plate, width L, thickness h.
Further, the coordinate based on establishment of coordinate system, with bottom surface of light guide plate and first area source origination side
Intersection point is origin, is to the right positive direction of the x-axis along expansion light source orientation, along the I of expansion light source light0Output intensity direction is
The positive direction of y-axis.
Further, in step S2, illumination of the point light source to one line of bottom surface of light guide plate are as follows:
Wherein, I0It is the light intensity that LED impinges perpendicularly on light guide plate light incident sides.
Further, in step S3, illumination of the linear light source to bottom surface of light guide plate are as follows:
Wherein, a is the width for extending LED light source, and L is guide-lighting board width.
It is further, described to calculate linear optical wand light source to the illumination specific steps S4 of bottom surface of light guide plate are as follows:
Step S41: by E (a, L) according to total reflection condition spread equivalently, being extended to a specific linear optical wand light source,
It is to the illumination on the line of bottom surface one are as follows:
Wherein,For the equivalent expansive of the LED after light is totally reflected in light guide plate
Optical wand length；θEntirelyFor the angle of total reflection；
Step S42: according to E (θEntirely, L), with x, the coordinate replacement variable α and L of y, the available available bottom surface in bottom surface
Arbitrary coordinate point (x, y), linear optical wand light source is to bottom surface illumination are as follows:
Further, in step S5, illumination of the area source to bottom surface of light guide plate are as follows:
Wherein, b is the length of single area source.
Further, the step S6 specifically:
Step S61: the LED parameter and leaded light board parameter of setting are substituted into, and according to single area source to bottom surface of light guide plate
Illumination of the N number of area source of luminance calculation to bottom surface of light guide plate:
Wherein: EkWhat is indicated is the Illumination Distribution of bottom surface of light guide plate in kth part, light guide plate according to output optical zone domain equal part
Or it is non-be divided into N item, kth part indicates any one therein；
Step S62: according to N number of area source to the illumination of bottom surface of light guide plate, the coordinate position net of available corresponding site
Radius size are as follows:
rkScattering netted dot radius distribution corresponding to kth part.
Further, the light guide panel material includes but is not limited to: polyethylene, polypropylene, polyethylene naphthalate,
Polycarbonate, polymethyl acrylate, polymethyl methacrylate, acetylbutyrylcellulose, siloxanes, polyvinyl chloride, polyethylene
Alcohol, polyethylene terephthalate, modified polyethylene terephthalate, dimethyl silicone polymer, cyclenes copolymer, glass,
Quartz and transmission ceramics.
Further, a kind of edge-type light guide plate bottom surface network point distribution design method, it is characterised in that: the expansion
The central wavelength lambda of exhibition light source belongs to visible light wave range, and wave-length coverage is between 380nm to 780nm.Expansion light source can be LED
Lamp is also possible to cold-cathode fluorescent light according to array layout, can also be LED light or cold-cathode fluorescence lamp according to array layout
Pipe at linear array, but not limited to this.Preferably, the spacing of the extension LED light source light-emitting surface and light guide plate side≤
1mm can be considered and be tightly attached on light guide plate.The luminous width of the extension LED light source is less than or equal to light guide plate.The LED
Light source can be distributed in one or more sides of light guide plate.The luminous intensity of the single extension LED light source meets lambert's spoke
Beam, i.e. radiation intensity abide by the radiation source of cosine rule, light with the variation of the angle theta between direction of observation and face source normal
Strong distribution meets formula:
Iθ=I0·cosθ (8)
Wherein, I0It is the light intensity that LED impinges perpendicularly on light guide plate light incident sides, IθIt is that light guide plate lower surface is incident on the angle θ
The light intensity of (bottom surface of light guide plate for thering is scattering netted dot to be distributed).
Compared with the prior art, the invention has the following beneficial effects:
The present invention can accurately and efficiently calculate light guide plate bottom tool according to the LED parameter given and guide-lighting board parameter
The brightness value of body point, and realize the distribution of Uniform Illumination light outgoing.This method avoid traditional designs to rely on warp mostly
The problem of testing provides a kind of method that distribution quickly designs, and has in the light source applications such as backlight and illumination important
Theory directive significance.
Detailed description of the invention
Fig. 1 is design method flow diagram of the present invention
Fig. 2 is in one embodiment of the invention for calculating point light source to the exemplary diagram of bottom surface of light guide plate point illumination
Fig. 3 is in one embodiment of the invention for calculating point light source to the exemplary diagram of illumination on one line of bottom surface of light guide plate
Fig. 4 is in one embodiment of the invention for calculating linear light source to the illumination exemplary diagram on one line of bottom surface of light guide plate
Fig. 5 is the exemplary diagram for resolving into countless point light sources of linear light source in one embodiment of the invention.
Fig. 6 is to show for calculating linear optical wand light source illumination on one line of bottom surface of light guide plate in one embodiment of the invention
Example diagram.
Fig. 7 is in one embodiment of the invention for calculating linear optical wand light source to the schematic diagram of the illumination of bottom surface of light guide plate.
Fig. 8 is in one embodiment of the invention for calculating linear optical wand light source to the top view of the illumination of bottom surface of light guide plate.
Fig. 9 is in one embodiment of the invention for calculating single extension LED light source to the exemplary diagram of bottom surface of light guide plate illumination.
Figure 10 is in one embodiment of the invention for calculating multiple extension LED light sources to the example of bottom surface of light guide plate illumination
Figure.
Figure 11 is in one embodiment of the invention for seeking the exemplary diagram of network point distribution design and illumination relationship.
Figure 12 is in one embodiment of the invention with the site radius size of the Matlab expansion light source obtained.
Figure 13 is in one embodiment of the invention with the coordinate value of the Matlab X-axis obtained.
Figure 14 is in one embodiment of the invention with the coordinate value of the Matlab Y-axis obtained.
Figure 15 be one embodiment of the invention in the light guide plate system based on point light source target face Illumination Distribution.
Figure 16 be one embodiment of the invention in the light guide plate system based on linear light source target face Illumination Distribution.
Figure 17 be one embodiment of the invention in the light guide plate system based on area source target face Illumination Distribution.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and embodiments.
Embodiment 1
Fig. 1 is please referred to, the present invention provides a kind of edge-type light guide plate bottom surface network point distribution design method:
Step 1: setting LED parameter and guide-lighting board parameter.LED parameter includes the initial direct projection light intensity of the length b of LED, width a
I0With the center spacing l of two LED lightN, guide-lighting board parameter includes length, width, thickness and the material of light guide plate.
Step 2: calculating point light source is that LED light source is considered as point light source, to the illumination of one line in bottom surface.It can from Fig. 2
To obtain following known conditions:
Wherein, h is the height of point light source, and L is the vertical range of required point and light guide plate side, and θ is the light of glancing incidence
Line and oblique incidence are to the angle between the light of bottom surface.Therefore it is derived, can be obtained as follows plus Lambert's cosine law by above-mentioned condition
As a result:
I'=I0·cosθ
EVertically=ETiltedly·sinθ
Wherein, I0For horizontal radiation intensity, I' is the radiation intensity of oblique incidence, ETiltedlyFor the brightness value of oblique incidence, EVerticallyFor
The vertical brightness value for arriving bottom surface.First group of formula is substituted into second group of formula, it can be deduced that incident ray one as shown in Figure 3
Without containing R value, and the only formula of vertical bottom face illumination related with variables L:
Step 3: calculating linear light source is that extension LED array light source is considered as linear light source, to the photograph on the line of bottom surface one
Degree, such as Fig. 4.At this point, the point light source that linear light source can regard different height as to the illumination of one line in bottom surface tires out illumination at L
Add.Therefore, the linear light source in Fig. 4 can be regarded as to the point light source of infinite a different height in Fig. 5.Then, to second step
The height h of middle point light source is integrated, and linear light source can be obtained to the illumination on the line of bottom surface one:
Wherein, a is the width for extending LED light source, and L is guide-lighting board width.
Step 4: calculating linear optical wand light source is to extend E (a, L), it is considered as linear optical wand light source, to the photograph of bottom surface
Degree.At this point, multiple reflections can occur inside light guide plate for light under total reflection condition, optical wand shown in fig. 6 will form.And
With θEntirelyMost multiple total reflection has occurred in incident light inside light guide plate, therefore also produces longest optical wand.θEntirelyIt should meet
In following formula:
In formula, nAirAnd nLight guide plateIt is the refractive index of air and the refractive index of light guide plate, and it is long to calculate longest optical wand
Degree:
At this point, the width a of the upper limit of integral LED light in third step, has been changed to hStick, therefore linear optical wand light source is obtained to bottom surface
Illumination on one line:
Target is that, according to Fig. 7, there is following relationship to obtain the illumination to bottom surface:
Wherein, α is the horizontal light of linear optical wand light source bottom end incidence and the angle of straight incident bottom surface point straight line, θαIt is
The angle of the horizontal light of linear optical wand light source top incidence and straight incident bottom surface point straight line, I' are and horizontal light incident light
Light intensity of the line at α, IθαIt is in vertical direction with I' at θαLight intensity.It, can be by linear optical wand light by above relational expression
Source is extended to linear optical wand light source to the illumination of bottom surface to the illumination on the line of bottom surface one:
The foundation of coordinate system is arranged using the intersection point of bottom surface of light guide plate and first area source origination side as origin along expansion light source
Column direction is positive direction of the x-axis to the right, along the I of expansion light source light0Output intensity direction is the positive direction of y-axis, further according to Fig. 8,
There is following relationship:
Variable α and L are replaced with the coordinate of (x, y), and under available bottom surface arbitrary coordinate, linear optical wand light source is to bottom surface
Illumination:
Step 5: calculating single extension LED light source to bottom surface illumination.As shown in figure 9, at this time single extension LED light source
To the illumination of bottom surface of light guide plate, the linear optical wand light source for regarding infinite a different location as adds up to this illumination.Therefore right
The mobile distance of abscissa is integrated, and mobile distance is denoted as b, and b is also the length of single extension LED light source.Therefore obtain list
Illumination of a extension LED light source to bottom surface:
Wherein, b is the length of single expansion light source.
Step 6: LED array as shown in Figure 10 is arranged if being generalized to N number of extension LED light source.It at this moment can be to single
Extension LED light source add up, and substitutes into the center of two extension LED away from lNIt is public using summation with the number of extension LED light source
Formula, the illumination of available N number of extension LED light source:
Step 7: being designed to scattering netted dot distribution, the radius including site according to expansion light source to the illumination of bottom surface
The position of size and site.Bottom surface of light guide plate is divided into n item, such as Figure 11 by us.Light injects light guide plate, the light under total reflection
Light guide plate can successively be passed through.Light often passes through a light guide plate, will scatter a part by site, therefore remoter from incident side,
Light is weaker.In order to make the uniform-illumination of guide-lighting plate top surface, mathematical model can be simplified, and make the following assumptions: bottom surface of light guide plate
Perpendicular in xoy plane Illumination Distribution and scattering netted dot radius size inversely, then the site scattering in different items,
Energy should meet difference equation:
Ekrk=Ek-1rk-1
In formula, EkThat indicate is the Illumination Distribution of bottom surface of light guide plate in kth part, rkCorresponding to scattering netted dot in kth part
Radius distribution.Similarly, Ek-1And rk-1It is to be scattered in -1 part of the Illumination Distribution of bottom surface of light guide plate and kth in -1 part of kth respectively
Site radius distribution.Thus formula recursion acquires:
Ek=Ek-1-Ek-1rk-1=Ek-1-Ekrk=...=E1-(k-1)Ekrk
In formula, E1It indicates that light enters the initial Illumination Distribution of light guide plate, is uniquely determined by array LED light source.To above formula
Merge similar terms final finishing and obtain following formula:
Finally, to found a 120mm × 70mm × 2mm polymethylacrylic acid of U.S. methacrylate sheet Co., Ltd
Methyl esters (Polymethylmethacrylate, PMMA) light guide plate is as design object, luminous the having of side entering type LED light source chip
Effect region is 4mm × 1.4mm, and LED chip is with a thickness of 0.8mm.According to the parameter of product specification book, which can be in typical function
0.2 watt-hour of rate exports the luminous flux of 25 lumens.By point light source, linear light source and extension LED light source to the illumination of bottom surface of light guide plate
It is substituted into Matlab respectively with the formula of site radius distribution, write program code and inputs the above parameter, can use calculating
Machine obtains about 1 ten thousand to two ten thousand dot data.It as shown in figure 12, is the radius size of site under expansion light source, Figure 13 and Figure 14
Show the coordinate position of site (x ' y).Parameter is input in Tracepro again, establishes the mathematical model of light guide plate.In mould
The bottom surface that light guide plate is chosen in type inputs scale and shell file and its property is arranged.Scale and shell file is a data of Tracepro
Library can set the geometry of site, the depth of site, the size of site, position of site etc. in library.Utilize calculating
Machine can be converted to the Matlab data obtained the scale and shell file that Tracepro can be read.Respectively to point in Tracepro
Light source, linear light source and extension LED light source carry out optical simulation, simulation result such as Figure 15, Figure 16 and Figure 17.
The uniformity of light guide plate light-emitting surface is evaluated with uniformity of illuminance, that is, refer to minimal illumination on regulation surface with
The ratio between average illumination.Average illumination then uses 9 methods of international ANSI, and light guide plate is divided into the nine grids of 3*3, takes every
The center illumination of a grid calculates the average value of nine grid center illumination and is denoted as average illumination.According to for uniform-illumination
Property calculation method, the illuminance uniformity of the system of the initialization design when being simulated using practical LED chip is only
40.875%, capacity usage ratio 88.543% is difficult meet the needs of practical light-emitting uniformity.
Light source is defined as array linear light source, is placed on the left of light guide plate, and enters light for long side, if Figure 16 is to find out array
Linear light source distance light source region energy very little, then there are a large amount of beam projectings in light guide plate dipped beam side.Analyzing its main cause is light guide plate
Close to sources area distribution site is much larger than distance light source region site radius, and light is after close to sources regions scatter, due to far field
Domain light directing site radius very little, the probability that light is scattered substantially reduce；Light guide plate two sides illumination is then due to two sides greatly
Reflector plate lead to light out.Therefore illuminance uniformity only has 70.589%, capacity usage ratio 88.484%, so being also difficult to meet
The demand of practical light-emitting uniformity.Figure 17 is to go out intensity of illumination distribution figure based on 5.5 inches of light guide plates of expansion light source, according to system
Simulation result does not consider that the factors such as the energy loss of each optical diaphragm, the light efficiency of transmission of light guide plate have reached 79.671%,
But the illuminance uniformity of light guide plate is promoted to 92.857%, has reached the design object of light-emitting uniformity.In Figure 15, Figure 16
In, based on point light source design scheme cause out the non-uniform phenomenon of light be also extremely improved, avoid instant and near light source region
The excessive too small problem of domain site radius.The result shows that: when being scattered network point distribution design, array LED light source can not
Simple construction is the model of array point light source or array linear light source, and the site based on expansion light source is used on the basis of the two
Distribution can obtain design effectively, it was demonstrated that the correctness and practicability of the design method.
The foregoing is merely presently preferred embodiments of the present invention, all equivalent changes done according to scope of the present invention patent with
Modification, is all covered by the present invention.
Claims (10)
1. a kind of edge-type light guide plate bottom surface network point distribution design method, it is characterised in that: the following steps are included:
Step S1: setting LED parameter and guide-lighting board parameter；
Step S2: according to the parameter of setting, LED is considered as point light source, calculates point light source to the illumination of one line of bottom surface of light guide plate；
Step S3: point light source is extended to linear light source, and linear light is calculated to the illumination of one line of bottom surface of light guide plate according to point light source
Illumination of the source to bottom surface of light guide plate；
Step S4: linear light source being unfolded in light guide plate by total reflection several times, linear optical wand light source is extended to, and
According to linear light source to the luminance calculation threadiness optical wand light source of bottom surface of light guide plate to the illumination of bottom surface of light guide plate；
Step S5: linear optical wand light source is extended to area source, and according to linear optical wand light source to the illumination of bottom surface of light guide plate, meter
Single area source is calculated to the illumination of bottom surface of light guide plate；
Step S6: the LED parameter and leaded light board parameter of setting are substituted into, and according to single area source to the illumination photometer of bottom surface of light guide plate
N number of area source is calculated to the illumination of bottom surface of light guide plate；It is fixed by the conservation of energy according to N number of area source to the illumination of bottom surface of light guide plate
Rule obtains the site radius size of the coordinate position of any site.
2. a kind of edge-type light guide plate bottom surface network point distribution design method according to claim 1, it is characterised in that: described
LED parameter includes the length b, width a, initial direct projection light intensity I of LED0With the center spacing l of two LED lightN。
3. a kind of edge-type light guide plate bottom surface network point distribution design method according to claim 2, it is characterised in that: described
Guide-lighting board parameter includes the length W of light guide plate, width L, thickness h.
4. a kind of edge-type light guide plate bottom surface network point distribution design method according to claim 3, it is characterised in that: described
Coordinate based on establishment of coordinate system, using the intersection point of bottom surface of light guide plate and first area source origination side as origin, along expansion light source
Orientation is positive direction of the x-axis to the right, along the I of expansion light source light0Output intensity direction is the positive direction of y-axis.
5. a kind of edge-type light guide plate bottom surface network point distribution design method according to claim 4, it is characterised in that: step
In S2, illumination of the point light source to one line of bottom surface of light guide plate are as follows:
Wherein, I0It is the light intensity that LED impinges perpendicularly on light guide plate light incident sides.
6. a kind of edge-type light guide plate bottom surface network point distribution design method according to claim 5, it is characterised in that: step
In S3, illumination of the linear light source to bottom surface of light guide plate are as follows:
Wherein, a is the width for extending LED light source, and L is guide-lighting board width.
7. a kind of edge-type light guide plate bottom surface network point distribution design method according to claim 6, it is characterised in that: described
Linear optical wand light source is calculated to the illumination of bottom surface of light guide plate specifically:
Step S41: by E (a, L) according to total reflection condition spread equivalently, being extended to a specific linear optical wand light source, right
Illumination on the line of bottom surface one are as follows:
Wherein,For the equivalent expansive optical wand of the LED after light is totally reflected in light guide plate
Length；θEntirelyFor the angle of total reflection；
Step S42: according to E (θEntirely, L), with x, the coordinate replacement variable α and L of y, available bottom surface arbitrary coordinate point (x, y),
Linear optical wand light source is to bottom surface illumination are as follows:
8. a kind of edge-type light guide plate bottom surface network point distribution design method according to claim 7, it is characterised in that: step
In S5, illumination of the single area source to bottom surface of light guide plate are as follows:
Wherein, b is the length of single area source.
9. a kind of edge-type light guide plate bottom surface network point distribution design method according to claim 8, it is characterised in that: described
Step S6 specifically:
Step S61: the LED parameter and leaded light board parameter of setting are substituted into, and according to area source to the luminance calculation N of bottom surface of light guide plate
Illumination of a area source to bottom surface of light guide plate:
Wherein: EkWhat is indicated is the Illumination Distribution of bottom surface of light guide plate in kth part, light guide plate according to output optical zone domain equal part or non-
It is divided into N item, kth part indicates any one therein；
Step S62: according to N number of area source to the illumination of bottom surface of light guide plate, the coordinate position site of available corresponding site
Radius size are as follows:
rkScattering netted dot radius distribution corresponding to kth part.
10. a kind of edge-type light guide plate bottom surface network point distribution design method according to claim 1, it is characterised in that: institute
Stating light guide panel material includes: polyethylene, polypropylene, polyethylene naphthalate, polycarbonate, polymethyl acrylate, poly- first
Base methyl acrylate, acetylbutyrylcellulose, siloxanes, polyvinyl chloride, polyvinyl alcohol, polyethylene terephthalate, modification
Polyethylene terephthalate, dimethyl silicone polymer, cyclenes copolymer, glass, quartz and transmission ceramics.
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