CN101737720A - Screen dot design method of side light type light guide plate of LED light source - Google Patents

Abstract

The invention provides a screen dot design method of a side light type light guide plate of an LED light source, comprising the following steps of: establishing a two-dimensional coordinate plane, and determining a rectangular lighting area; establishing a density distribution function model in the rectangular lighting area; designing a screen dot space distribution function according to the density distribution function model inside the rectangular lighting area; generating original light guide plate random number screen dots according to the screen dot space distribution function; providing an intermolecular potential energy function, regulating the original light guide plate random number screen dots with serious stacking by applying the intermolecular potential energy function, and then generating light guide plate screen dots with reasonable spaces; converting the density distribution function model, the screen dot space distribution function and an intermolecular potential energy function model into computer languages by a VBA development tool facing to objectification, and establishing a VB user interface (VB form). The invention enhances the development speed of the light guide plate and overcomes the defect of manual regulation needed in the screen dot design process of the light guide plate.

Description

A kind of side light type light guide plate mesh point method for designing of led light source

Technical field

The invention belongs to the side light type light guide plate mesh point technical field of led light source, particularly relate to a kind of side light type light guide plate mesh point method for designing of led light source.

Technical background

LED (light emitting diode) is serving as the light source of module backlight more and more at present, and LED is a spot light, and traditional CCFL (cold-cathode tube) is a line source, and the light guide plate mesh point Design Mode of spot light and line source is different.Be accompanied by the universal stage that is in develop rapidly of liquid crystal display device as module backlight indispensable in the liquid crystal display device.LGP is key components in the module backlight, and it has important meaning to the whole optical effect that improves module backlight.Developing high efficiency LGP has become a hot issue of industry backlight.

Traditional module backlight, especially large-sized module backlight, mostly adopt cold-cathode tube (CCFL) as light source, but the CCFL light source is short service life, and luminous efficiency is low, and module backlight is as a part of liquid crystal display product, if because light source life, cause influence devices such as luminous efficiency use, and waste is not only a module backlight but entire product so, so the selection of light source is very important for module backlight.LED is as a kind of emerging light source, from its invention, just receive much concern, especially Japanese Ri Ya chemical company in 1996 after colored yellow fluorescent material on the blue led has been realized white light output, people are more and more stronger to the conviction of LED replacement conventional light source in illumination and field of backlights.As everyone knows, one of characteristics of LED are to send out directional light.The side light type LGP will successfully be transmitted to whole light-emitting zone to the light energy of LED and will dredge light, dredge light and will change LED distribution of light situation.Breaing up the total reflection of light in LGP by the site that distributes in the exiting surface of LGP and reflecting surface design certain rule just can very successfully dredge light and conduct towards rational zone.

Present existing technical step is: the developer of LGP utilizes some site makers to generate original site system earlier, does manual setting according to optical effect then.But the site number that distributes on the LGP is huge, 100,000 sites nearly that just distributed on the LGP about common one three cun are not if the site of these tremendous amounts settles at one go and generates and want manual setting will increase LGP developer's workload greatly.Existing light guide plate mesh point designing technique generally all is the little net region that light-emitting zone is partitioned into some, according to the zone at grid place different mesh dot densities is set, and uses method such as repulsion mitigation to realize the spacing adjustment of site then.The disadvantage of existing method is: form tangible site intermediate zone on the border of little net region easily, especially in the position, dead ahead of LED and the zone of the right and left thereof, these area grid density drops are big, and the site intermediate zone clearly.The present invention uses the density fonction network point to generate, and it has saved the process that grid is cut apart, and has fundamentally solved the defective of site intermediate zone.

In addition, the molecular potential method that the present invention proposes is having bigger advantage with existing method aspect the spacing of adjusting site relatively, the molecular potential method exists repulsion and gravitation simultaneously, so not only can repel and solve the site and pile up phenomenon, can also be drawn together the phenomenon that solves site vacancy (in the bigger regional extent without any network point distribution) by the gravitation site that spacing is excessive by the repulsion site that spacing is too small.

Summary of the invention

The objective of the invention is to overcome the deficiencies in the prior art,, proposed a kind of side light type light guide plate mesh point method for designing of led light source at the defective that the design of present LED side light type backlight module site is difficult to settle at one go.

The technical scheme of technical solution problem of the present invention is: a kind of side light type light guide plate mesh point method for designing of led light source is provided, and the technical scheme that it adopted may further comprise the steps:

(1) sets up a two-dimensional coordinate plane, determine luminous rectangular area;

(2) in luminous rectangular area, set up a density fonction model;

(3) according to site space distribution function of the density fonction modelling in the light-emitting zone;

(4) generate the random number of original light guide plate site (see figure 2) according to the site space distribution function;

(5) propose a kind of molecular potential function, utilization molecular potential function seriously piles up after the random number of LGP site adjusts original having, and obtains generating the rational light guide plate mesh point of spacing;

(6) the VBA developing instrument of use object-orientedization transforms into computer language with above-mentioned density fonction model, site space distribution function, molecular potential function model, sets up a VB user interface (VB forms).

The side light type light guide plate mesh point method for designing of a kind of led light source of the present invention, described two-dimensional coordinate plane, the length of its light-emitting zone overlaps with Y-axis, and the wide and X-axis of light-emitting zone overlaps.With y _LThe expression light-emitting zone is long, with x _WExpression luminous zone field width, light-emitting zone are (0,0), (x with the summit in two dimensional surface _W, 0), (x _W, y _L), (0, y _L) the rectangular area represent.

The side light type light guide plate mesh point method for designing of a kind of led light source of the present invention, described density fonction model are to be represented by described site space distribution function, with (x ₀, y ₀) for the local area network dot spacing distribution function at center be:

$R_{x0y0}=\frac{1}{\sqrt{2\×\mathrm{\π}}\×\mathrm{\σ}}\×\exp [\frac{{(x-x_0)}^2}{{{\mathrm{\σ}}_x}^2}+\frac{{(y-y_0)}^2}{{{\mathrm{\σ}}_y}^2}+\frac{(x-x_0)(y-y_0)}{{\mathrm{\σ}}_x\×{\mathrm{\σ}}_y}],$

Be provided with coordinate by the light-emitting zone of LGP in X, Y plane, the wide and X-axis of light-emitting zone overlaps, the length of light-emitting zone overlaps with Y-axis.By adjusting coordinate (x ₀, y ₀) just can control the density of any position in the light-emitting zone, σ is used to control adjusting range, σ _x, σ _yBe used to control the shape of adjustment region.

The side light type light guide plate mesh point method for designing of a kind of led light source of the present invention, described site space distribution function comprise following three site spacing expression formulas:

1. the light direction of LED is parallel to the y axle, and then dot density should diminish gradually along with the y axle, and site spacing expression formula is:

Wherein Δ is an arithmetic number.

2. near the zone (close to sources zone) of LED, be that dot density changes the most complicated zone, the coordinate position of LED just can be realized corresponding site design in the middle of must being encompassed in density function.Suppose in the module backlight of needs design site and contain the n LEDs, corresponding coordinate is respectively: (x ₁, y ₁), (x ₂, y ₂), (x ₃, y ₃)------(x _n, y _n), meaningful in order to guarantee density in addition, the site spacing must can obtain the site spacing expression formula of LED coordinate greater than 0 by above design:

$R_{\mathrm{xy}}=\frac{1}{y+{\mathrm{\Δ}}_1}+{\mathrm{\Δ}}_2$

$+\frac{1}{\sqrt{2\×\mathrm{\π}}\×{\mathrm{\σ}}_1}\×\exp [\frac{{(x-x_1)}^2}{{{\mathrm{\σ}}_{x1}}^2}+\frac{{(y-y_1)}^2}{{{\mathrm{\σ}}_{y1}}^2}+\frac{(x-x_1)(y-y_1)}{{\mathrm{\σ}}_{x1}\×{\mathrm{\σ}}_{y1}}]$

$+\frac{1}{\sqrt{2\×\mathrm{\π}}\×{\mathrm{\σ}}_2}\×\exp [\frac{{(x-x_2)}^2}{{{\mathrm{\σ}}_{x2}}^2}+\frac{{(y-y_2)}^2}{{{\mathrm{\σ}}_{y2}}^2}+\frac{(x-x_2)(y-y_2)}{{\mathrm{\σ}}_{x2}\×{\mathrm{\σ}}_{y2}}]$

$+\frac{1}{\sqrt{2\×\mathrm{\π}}\×{\mathrm{\σ}}_3}\×\exp [\frac{{(x-x_3)}^2}{{{\mathrm{\σ}}_{x3}}^2}+\frac{{(y-y_3)}^2}{{{\mathrm{\σ}}_{y3}}^2}+\frac{(x-x_3)(y-y_3)}{{\mathrm{\σ}}_{x3}\×{\mathrm{\σ}}_{y3}}]\·\·\·$

$+\frac{1}{\sqrt{2\×\mathrm{\π}}\×{\mathrm{\σ}}_n}\×\exp [\frac{{(x-x_n)}^2}{{{\mathrm{\σ}}_{\mathrm{xn}}}^2}+\frac{{(y-y_n)}^2}{{{\mathrm{\σ}}_{\mathrm{yn}}}^2}+\frac{(x-x_n)(y-y_n)}{{\mathrm{\σ}}_{\mathrm{xn}}\×{\mathrm{\σ}}_{\mathrm{yn}}}],$

3. light-emitting zone before light source two corner location and the zone between the LED, these zones are zones that the light of LED is difficult to be transmitted to, and the density bigger than other zones must be set.Can draw according to the LED coordinate that the coordinate of position is respectively between the LED:

Setting light-emitting zone length is y _L, width is x _W, then before the light source about the coordinate in two corners be (0,0), (x _W, 0), site spacing expression formula is:

${R^{\′}}_{\mathrm{xy}}=\frac{1}{\sqrt{2\×\mathrm{\π}}\×{{\mathrm{\σ}}_1}^{\′}}\×\exp [\frac{{(x-\frac{x_1+x_2}{2})}^2}{{{{\mathrm{\σ}}^{\′}}_{x1}}^2}+\frac{{(y-y_1)}^2}{{{{\mathrm{\σ}}^{\′}}_{y1}}^2}+\frac{\left(x-\frac{x_1+x_2}{2}\right)\×(y-y_1)}{{{\mathrm{\σ}}^{\′}}_{x1}\×{{\mathrm{\σ}}^{\′}}_{y1}}]$

$+\frac{1}{\sqrt{2\×\mathrm{\π}}\×{{\mathrm{\σ}}_2}^{\′}}\×\exp [\frac{{(x-\frac{x_2+x_3}{2})}^2}{{{{\mathrm{\σ}}^{\′}}_{x2}}^2}+\frac{{(y-y_2)}^2}{{{{\mathrm{\σ}}^{\′}}_{y2}}^2}+\frac{\left(x-\frac{x_2+x_3}{2}\right)\×(y-y_2)}{{{\mathrm{\σ}}^{\′}}_{x2}\×{{\mathrm{\σ}}^{\′}}_{y2}}]$

$+\frac{1}{\sqrt{2\×\mathrm{\π}}\×{{\mathrm{\σ}}_3}^{\′}}\×\exp [\frac{{(x-\frac{x_3+x_4}{2})}^2}{{{{\mathrm{\σ}}^{\′}}_{x3}}^2}+\frac{{(y-y_3)}^2}{{{{\mathrm{\σ}}^{\′}}_{y3}}^2}+\frac{\left(x-\frac{x_3+x_4}{2}\right)\×(y-y_3)}{{{\mathrm{\σ}}^{\′}}_{x3}\×{{\mathrm{\σ}}^{\′}}_{y3}}]$

$+\·\·\·$

$+\frac{1}{\sqrt{2\×\mathrm{\π}}\×{{\mathrm{\σ}}_{n-1}}^{\′}}\×\exp [\frac{{(x-\frac{x_{n-1}+x_n}{2})}^2}{{{{\mathrm{\σ}}^{\′}}_{x(n-1)}}^2}+\frac{{(y-y_{n-1})}^2}{{{{\mathrm{\σ}}^{\′}}_{y(n-1)}}^2}+\frac{\left(x-\frac{x_{n-1}+x_n}{2}\right)\×(y-y_{n-1})}{{{\mathrm{\σ}}^{\′}}_{x(n-1)}\×{{\mathrm{\σ}}^{\′}}_{y(n-1)}}]$

$+\frac{1}{\sqrt{2\×\mathrm{\π}}\×{{\mathrm{\σ}}_L}^{\′}}\×\exp [\frac{{(x-0)}^2}{{{{\mathrm{\σ}}^{\′}}_{\mathrm{xL}}}^2}+\frac{{(y-0)}^2}{{{{\mathrm{\σ}}^{\′}}_{\mathrm{yL}}}^2}+\frac{\left(x-0\right)\×(y-0)}{{{\mathrm{\σ}}^{\′}}_{\mathrm{xL}}\×{{\mathrm{\σ}}^{\′}}_{\mathrm{yL}}}]$

$+\frac{1}{\sqrt{2\×\mathrm{\π}}\×{{\mathrm{\σ}}_W}^{\′}}\×\exp [\frac{{(x-x^W)}^2}{{{{\mathrm{\σ}}^{\′}}_{\mathrm{xW}}}^2}+\frac{{(y-0)}^2}{{{{\mathrm{\σ}}^{\′}}_{\mathrm{yW}}}^2}+\frac{\left(x-x^W\right)\×(y-0)}{{{\mathrm{\σ}}^{\′}}_{\mathrm{xW}}\×{{\mathrm{\σ}}^{\′}}_{\mathrm{yW}}}],$

With the 1. 2. 3. site spacing distribution and expression formula f (y) of gained, R _Xy, R ' _XyMerging obtains distribution function between the site, can be at the light guide plate mesh point layout of the certain LED of a certain light-emitting zone number.At certain a specific module backlight, the parameter of adjusting in the formula just can obtain rational dot density distribution pattern.

The side light type light guide plate mesh point method for designing of a kind of led light source of the present invention in the described molecular potential function, is treated as molecule one by one to the site, and the site also has molecular potential, exists interaction force, active force to comprise attraction and repulsive force between the site.When the site spacing during greater than equilibrium distance active force show as attraction; When the site spacing during less than equilibrium distance active force show as repulsion.Use molecular potential function design site to adjust program, set a balance net dot spacing, when site spacing during greater than equilibrium spacing, gravitation makes the site close, and when site spacing during less than equilibrium spacing, repulsion arranges the site.

The side light type light guide plate mesh point method for designing of a kind of led light source of the present invention, described VB user interface (VB forms), the parameter that the user need import has: the coordinate position of light-emitting zone length, luminous zone field width, relative density value, LED quantity, each LEDs, after having imported all sites, click " determining to generate the site " order button, just can obtain needed network point distribution figure.

Its advantage of side light type light guide plate mesh point method for designing of a kind of led light source of the present invention is, on the level of control density fonction, the site is adjusted, overcome light guide plate mesh point and generate the difficulty that is difficult to settle at one go, save the defective uninteresting, consuming time of manual compensation, improved the development efficiency of LGP; The scope of application is extensive, the function that is used for the network point generation has many coefficients, can tackle in larger scope practical application by changing these coefficients, it is obvious to generate the density area difference, the light guide plate mesh point pattern of density area transition nature, any tangible dot density intermediate zone from top to bottom, is not from left to right all seen in the site of using the present invention to generate; User interface is simple, and as long as the user is according to input of the prompting in the label and own development corresponding parameters, and the user needn't have very comprehensive drawing knowledge and computer literacy.

Description of drawings

Fig. 1 is the side light type light guide plate mesh point method for designing flow chart of led light source of the present invention;

Fig. 2 is the even random number half-tone of the present invention's density unevenness at random;

Fig. 3 is a molecular potential curve map of the present invention;

Fig. 4 solves the detailed process schematic diagram that phenomenon is piled up in the site for the present invention;

Fig. 5 is the adjusted half-tone of the present invention's process molecular potential model;

Fig. 6 is a user interface map of the present invention;

Fig. 7 is the design sketch of the embodiment of the invention 1;

Fig. 8 is the design sketch of the embodiment of the invention 2;

Fig. 9 is the design sketch of the embodiment of the invention 3;

Figure 10 is the design sketch of the embodiment of the invention 4;

Figure 11 is the design sketch of the embodiment of the invention 5.

The specific embodiment

The present invention is described further below in conjunction with accompanying drawing.

Embodiment 1:

For the effect of verifying that the present invention uses on LGP, we will use user interface of the present invention to generate the site, and its light-emitting zone is long to be 69.7mm, the luminous zone field width is 32.48mm, and the relative density value is 0.75, and LED quantity is 5, corresponding LED coordinate is respectively (3.248,0), (9.744,0), (16.24,0), (22.736,0), (29.232,0).These parameter inputs Fig. 6 user interface is clicked " determining to generate the site " button just obtain site as shown in Figure 7.We with the site that obtains input laser engraving machine and engraving on core rod, pass through again plastic rubber shaping with the site transcription above LGP.As can be seen from the test results: the employing light guide plate mesh point that the present invention generated can be controlled the optical effect of module backlight effectively, and by 9 methods of testing of Minolta, the uniformity that obtains module backlight is 89%.

Embodiment 2:

Fig. 8 is the light guide plate mesh point pattern of single LEDs, and the site relative density is 0.9, the long 20mm of its light-emitting zone, luminous zone field width 20mm.LED is positioned at the lower right corner of whole light-emitting zone, and dot density increases with the increase of jet nit point position and LED spacing as can be seen from Figure 8.

Embodiment 3:

Fig. 9 is the light guide plate mesh point pattern of two LEDs, and the site relative density is 0.9, the long 20mm of its light-emitting zone, luminous zone field width 20mm.The coordinate position of LED is respectively: (5,0); (15,0).

Embodiment 4:

Figure 10 is the light guide plate mesh point pattern of three LEDs, and the site relative density is 0.8, the long 30mm of its light-emitting zone, luminous zone field width 30mm.The coordinate position of LED is respectively: (5,0); (15,0), (25,0).

Embodiment 5:

Figure 11 is the light guide plate mesh point pattern of four LEDs, and the site relative density is 0.7, the long 40mm of its light-emitting zone, luminous zone field width 50mm.The coordinate position of LED is respectively: (5,0); (15,0), (25,0), (35,0).

Claims (8)

1. the side light type light guide plate mesh point method for designing of a led light source is characterized in that may further comprise the steps:

(1) sets up a two-dimensional coordinate plane, determine luminous rectangular area;

(2) in luminous rectangular area, set up a density fonction model;

(3) according to site space distribution function of the density fonction modelling in the light-emitting zone;

(4) generate the random number of original light guide plate site according to the site space distribution function;

(5) propose a kind of molecular potential function, utilization molecular potential function has after the random number of the LGP site of seriously piling up adjusts original, generates the rational light guide plate mesh point of spacing;

(6) the VBA developing instrument of use object-orientedization transforms into computer language with above-mentioned density fonction model, site space distribution function, molecular potential function model, sets up a VB user interface.

2. the side light type light guide plate mesh point method for designing of a kind of led light source according to claim 1 is characterized in that the described density fonction model of step (2) is to be represented by the described site of step (3) space distribution function, with (x ₀, y ₀) for the local area network dot spacing distribution function at center be:

$R_{x0y0}=\frac{1}{\sqrt{2\×\mathrm{\π}}\×\mathrm{\σ}}\×\exp [\frac{{(x-x_0)}^2}{{{\mathrm{\σ}}_x}^2}+\frac{{(x-y_0)}^2}{{{\mathrm{\σ}}_y}^2}+\frac{(x-x_0)(y-y_0)}{{\mathrm{\σ}}_x\×{\mathrm{\σ}}_y}],$

Be provided with coordinate by the light-emitting zone of LGP in X, Y plane, the wide and X-axis of light-emitting zone overlaps, the length of light-emitting zone overlaps with Y-axis, by adjusting coordinate (x ₀, y ₀) density of any position in the control light-emitting zone, σ is used to control adjusting range, σ _x, σ _yBe used to control the shape of adjustment region.

3. the side light type light guide plate mesh point method for designing of a kind of led light source according to claim 1, it is characterized in that the described site of step (3) space distribution function comprises when the light direction of following three expression formula: LED is parallel to the y axle site spacing expression formula f (y); Light-emitting zone is during near LED regional, site spacing expression formula R _XyLight-emitting zone before light source two corner location and LED between regional the time, site spacing expression formula R ' _Xy

4. the side light type light guide plate mesh point method for designing of a kind of led light source according to claim 3 is characterized in that described f (y) expression formula is: $f\left(y\right)=\frac{1}{y+\mathrm{\Δ}},$ Wherein Δ is an arithmetic number.

5. the side light type light guide plate mesh point method for designing of a kind of led light source according to claim 3 is characterized in that described R _Xy, expression formula is:

$R_{\mathrm{xy}}=\frac{1}{y+{\mathrm{\Δ}}_1}+{\mathrm{\Δ}}_2$

$+\frac{1}{\sqrt{2\×\mathrm{\π}}\×{\mathrm{\σ}}_1}\×\exp [\frac{{(x-x_1)}^2}{{{\mathrm{\σ}}_{x1}}^2}+\frac{{(y-y_1)}^2}{{{\mathrm{\σ}}_{y1}}^2}+\frac{(x-x_1)(y-y_1)}{{\mathrm{\σ}}_{x1}\×{\mathrm{\σ}}_{y1}}]$

$+\frac{1}{\sqrt{2\×\mathrm{\π}}\×{\mathrm{\σ}}_2}\×\exp [\frac{{(x-x_2)}^2}{{{\mathrm{\σ}}_{x2}}^2}+\frac{{(y-y_2)}^2}{{{\mathrm{\σ}}_{y2}}^2}+\frac{(x-x_2)(y-y_2)}{{\mathrm{\σ}}_{x2}\×{\mathrm{\σ}}_{y2}}]$

$+\frac{1}{\sqrt{2\×\mathrm{\π}}\×{\mathrm{\σ}}_3}\×\exp [\frac{{(x-x_3)}^2}{{{\mathrm{\σ}}_{x3}}^2}+\frac{{(y-y_3)}^2}{{{\mathrm{\σ}}_{y3}}^2}+\frac{(x-x_3)(y-y_3)}{{\mathrm{\σ}}_{x3}\×{\mathrm{\σ}}_{y3}}]\·\·\·$

$+\frac{1}{\sqrt{2\×\mathrm{\π}}\×{\mathrm{\σ}}_n}\×\exp [\frac{{(x-x_n)}^2}{{{\mathrm{\σ}}_{\mathrm{xn}}}^2}+\frac{{(y-y_n)}^2}{{{\mathrm{\σ}}_{\mathrm{yn}}}^2}+\frac{(x-x_n)(y-y_n)}{{\mathrm{\σ}}_{\mathrm{xn}}\×{\mathrm{\σ}}_{\mathrm{yn}}}],$

Contain the n LEDs in the module backlight of design site, corresponding coordinate is respectively: (x ₁, y ₁), (x ₂, y ₂), (x ₃, y ₃)------(x _n, y _n).

6. the side light type light guide plate mesh point method for designing of a kind of led light source according to claim 3 is characterized in that described R ' _XyExpression formula is:

${R^{\′}}_{\mathrm{xy}}=\frac{1}{\sqrt{2\×\mathrm{\π}}\×{{\mathrm{\σ}}_1}^{\′}}\×\exp [\frac{{(x-\frac{x_1+x_2}{2})}^2}{{{{\mathrm{\σ}}^{\′}}_{x1}}^2}+\frac{{(y-y_1)}^2}{{{{\mathrm{\σ}}^{\′}}_{y1}}^2}+\frac{(x-\frac{x_1+x_2}{2})(y-y_1)}{{{\mathrm{\σ}}^{\′}}_{x1}\×{{\mathrm{\σ}}^{\′}}_{y1}}]$

$+\frac{1}{\sqrt{2\×\mathrm{\π}}\×{{\mathrm{\σ}}_2}^{\′}}\×\exp [\frac{{(x-\frac{x_2+x_3}{2})}^2}{{{{\mathrm{\σ}}^{\′}}_{x2}}^2}+\frac{{(y-y_2)}^2}{{{{\mathrm{\σ}}^{\′}}_{y2}}^2}+\frac{(x-\frac{x_2+x_3}{2})(y-y_2)}{{{\mathrm{\σ}}^{\′}}_{x2}\×{{\mathrm{\σ}}^{\′}}_{y2}}]$

$+\frac{1}{\sqrt{2\×\mathrm{\π}}\×{{\mathrm{\σ}}_3}^{\′}}\×\exp [\frac{{(x-\frac{x_3+x_4}{2})}^2}{{{{\mathrm{\σ}}^{\′}}_{x3}}^2}+\frac{{(y-y_3)}^2}{{{{\mathrm{\σ}}^{\′}}_{y3}}^2}+\frac{(x-\frac{x_3+x_4}{2})(y-y_3)}{{{\mathrm{\σ}}^{\′}}_{x3}\×{{\mathrm{\σ}}^{\′}}_{y3}}]$

$+\·\·\·$

$+\frac{1}{\sqrt{2\×\mathrm{\π}}\×{{\mathrm{\σ}}_{n-1}}^{\′}}\×\exp [\frac{{(x-\frac{x_{n-1}+x_n}{2})}^2}{{{{\mathrm{\σ}}^{\′}}_{x(n-1)}}^2}+\frac{{(y-y_{n-1})}^2}{{{{\mathrm{\σ}}^{\′}}_{y(n-1)}}^2}+\frac{(x-\frac{x_{n-1}+x_n}{2})(y-y_{n-1})}{{{\mathrm{\σ}}^{\′}}_{x(n-1)}\×{{\mathrm{\σ}}^{\′}}_{y(n-1)}}]$

$+\frac{1}{\sqrt{2\×\mathrm{\π}}\×{{\mathrm{\σ}}_L}^{\′}}\×\exp [\frac{{(x-0)}^2}{{{{\mathrm{\σ}}^{\′}}_{\mathrm{xL}}}^2}+\frac{{(y-0)}^2}{{{{\mathrm{\σ}}^{\′}}_{\mathrm{yL}}}^2}+\frac{(x-0)\×(y-0)}{{{\mathrm{\σ}}^{\′}}_{\mathrm{xL}}\×{{\mathrm{\σ}}^{\′}}_{\mathrm{yL}}}]$

$+\frac{1}{\sqrt{2\×\mathrm{\π}}\×{{\mathrm{\σ}}_W}^{\′}}\×\exp [\frac{{(x-x^W)}^2}{{{{\mathrm{\σ}}^{\′}}_{\mathrm{xW}}}^2}+\frac{{(y-0)}^2}{{{{\mathrm{\σ}}^{\′}}_{\mathrm{yW}}}^2}+\frac{(x-x^W)\×(y-0)}{{{\mathrm{\σ}}^{\′}}_{\mathrm{xW}}\×{{\mathrm{\σ}}^{\′}}_{\mathrm{yW}}}],$

Wherein

Be the coordinate of position between the LED, setting light-emitting zone length is y _L, width is x _W, then before the light source about the coordinate in two corners be (0,0), (x _W, 0).

7. the side light type light guide plate mesh point method for designing of a kind of led light source according to claim 1, it is characterized in that in the described molecular potential function of step (5), use molecular potential function design site to adjust program, set a balance net dot spacing, when site spacing during greater than equilibrium spacing, gravitation makes the site close, and when site spacing during less than equilibrium spacing, repulsion arranges the site.

8. the side light type light guide plate mesh point method for designing of a kind of led light source according to claim 1, it is characterized in that the described VB user interface of step (6), the parameter that the user need import has: the coordinate position of light-emitting zone length, luminous zone field width, relative density value, LED quantity, each LEDs.

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