CN114371524B - Prism structure and design method thereof - Google Patents
Prism structure and design method thereof Download PDFInfo
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- CN114371524B CN114371524B CN202210068059.9A CN202210068059A CN114371524B CN 114371524 B CN114371524 B CN 114371524B CN 202210068059 A CN202210068059 A CN 202210068059A CN 114371524 B CN114371524 B CN 114371524B
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- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000009792 diffusion process Methods 0.000 claims abstract description 64
- 239000011241 protective layer Substances 0.000 claims abstract description 31
- 230000001419 dependent effect Effects 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 239000000463 material Substances 0.000 description 4
- 230000006978 adaptation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/04—Prisms
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/0012—Optical design, e.g. procedures, algorithms, optimisation routines
Abstract
The application discloses a prism structure and a design method thereof, wherein the design method comprises the following steps: obtaining structural parameters of a prism structure; determining an incident surface positioned on the prism body and an emergent surface positioned on the protective layer so as to determine a light diffusion distance formed in the prism structure after light rays enter from the incident surface and emerge from the emergent surface; selecting the furthest diffusion distance from the light diffusion distances, and establishing a functional relation between the furthest diffusion distance and structural parameters; and taking the value of the structural parameters according to the functional relation to construct a target model of the prism structure according to the value result. The application takes the value of the structural parameters of the prism structure according to the established functional relation, so as to select the optimal scheme capable of modulating the light rays to exit at a larger angle from all the design schemes according to certain conditions, and avoid trying all the design schemes in an exhaustive way, thereby being beneficial to improving the construction efficiency of the target model of the prism structure.
Description
Technical Field
The application relates to the technical field of display, in particular to a prism structure and a design method thereof.
Background
As the resolution of the display panel increases, the large viewing angle brightness of the display panel may be deteriorated. A layer of viewing angle diffusion film is usually added on the display panel, and the front viewing angle of the display panel can be modulated to a large viewing angle by using the viewing angle diffusion film, so that the display brightness of the large viewing angle is increased.
The light of the front view angle on the view angle diffusion film has a prism structure. In the related design of the prism structure, the time cost and the workload brought by all design schemes are excessively large in an exhaustive way, which is not beneficial to improving the construction efficiency of the prism structure.
Disclosure of Invention
The application provides a prism structure and a design method thereof, aiming at improving the construction efficiency of the prism structure.
In order to solve the above problems, the present application provides a method for designing a prism structure, the prism structure including a prism body and a protective layer covering the prism body; the design method comprises the following steps: obtaining structural parameters of the prism structure; determining an incident surface positioned on the prism body and an emergent surface positioned on the protective layer to determine a light diffusion distance formed in the prism structure after light rays are incident from the incident surface and emergent from the emergent surface; selecting the furthest diffusion distance from the light diffusion distances, and establishing a functional relation between the furthest diffusion distance and the structural parameters; and taking the value of the structural parameters according to the functional relation to construct a target model of the prism structure according to the value result.
The structural parameters comprise the length of the bottom edge or the length of the top edge of the prism body, the shortest distance from the prism body to the emergent surface, the height of the prism body and the base angle of the prism body.
Wherein said selecting a furthest diffusion distance from said light diffusion distances and establishing a functional relationship with respect to said furthest diffusion distance and said structural parameter comprises: selecting target light rays which are incident from the junction of the median line of the prism body and the light incident surface at a preset angle from the light rays and are emitted from the emitting surface; determining a light diffusion distance formed by the target light ray in the prism structure so as to obtain the furthest diffusion distance; and establishing the functional relation which is related to the preset angle, the furthest diffusion distance and the structural parameter.
Wherein the performing the value of the structural parameter according to the functional relation includes: respectively taking values of the bottom edge length or the top edge length, the shortest distance and the height so that the furthest diffusion distance changes along with the change of the bottom angle in the functional relation; and determining the value of the corresponding base angle when the furthest diffusion distance takes the maximum value.
Wherein the performing the value of the structural parameter according to the functional relation includes: setting the length of the bottom edge or the length of the top edge and the value range of the height respectively, and taking the value of the shortest distance; and determining the value of the corresponding base angle when the furthest diffusion distance obtains the maximum value according to the value range and the value of the shortest distance.
The preset angle is the maximum light emitting angle of the light emitting device.
Wherein the shortest distance is 2 μm.
The surface of the prism body, which is in contact with the protective layer, comprises a plurality of planes.
The cross section of the prism body is trapezoid or triangle.
The application also provides a prism structure which is designed and molded by the design method.
The beneficial effects of the application are as follows: in the design method, a function relation between the farthest diffusion distance and the structural parameter is established, the farthest diffusion distance can be used as a dependent variable in the function relation, the structural parameter is used as an independent variable, the change of the farthest diffusion distance along with the structural parameter is analyzed, when the farthest diffusion distance can be used for evaluating the modulating capability of the prism structure on the light emergent angle, a target model of the prism structure can be constructed according to the value result of the structural parameter, and the target model can modulate the light to emergent at a larger angle; and the structural parameters of the prism structure are valued according to the established functional relation, so that an optimal scheme capable of modulating light rays to emergent light rays with a larger angle is selected from all the design schemes according to certain conditions, all the design schemes are prevented from being tried in an exhaustive manner, and the construction efficiency of a target model of the prism structure is improved.
Drawings
In order to more clearly illustrate the technical solutions of the present application, the drawings that are needed in the description of the embodiments according to the present application will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flow chart of a method for designing a prism structure according to an embodiment of the present application;
FIG. 2 is a schematic cross-sectional view of a prism structure according to an embodiment of the present application;
fig. 3A to 3B are schematic cross-sectional views of a prism body according to an embodiment of the present application;
fig. 4 is a flow chart of step S13;
fig. 5 is a flow chart of step S14.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application.
In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
The following disclosure provides many different embodiments, or examples, for implementing different features of the application. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the application. Furthermore, the present application may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.
Referring to fig. 1 and fig. 2, fig. 1 is a flow chart of a method for designing a prism structure according to an embodiment of the present application, and fig. 2 is a schematic cross-sectional structure of a prism structure according to an embodiment of the present application. As shown in fig. 2, the prism structure 10 includes a prism body 11 and a protective layer 12 covering the prism body 11. As shown in fig. 3A and 3B, the cross-sectional shape of the prism body 11 may be selected to be trapezoidal or triangular.
After passing through the prism structure 10, the light is emitted from the surface of the protective layer 12, that is, the surface 121 of the protective layer 12 is an emitting surface. Wherein the prism body 11 and the protective layer 12 are made of materials with different refractive indexes, and the refractive index of the prism body 11 is n 1 The protective layer 12 has a refractive index n 2 As can be seen from the snell's law, when light is incident into the protective layer 12 from the prism body 11, the light is refracted, and thus the prism structure 10 can function to change the propagation direction of the light. Further, in the embodiment of the present application, since the construction of the target model of the prism structure 10 does not involve the selection of the structural material of the prism structure 10, the refractive index n of the prism body 11 1 And refractive index n of protective layer 12 2 Can be used as a constant value, e.g. n is set 1 1.45, n 2 1.6. The object model can be used to achieve the effect of modulating light to exit at a larger angle.
As shown in fig. 1, the design method may include the steps of:
and S11, obtaining structural parameters of the prism structure.
As shown in fig. 2, the structural parameters include the height a of the prism body 11, the base angle θ of the prism body 11 1 The length of the top edge b or the length of the bottom edge (not shown) of the prism body 11, and the shortest distance c between the prism body 11 and the exit surface.
In the present embodiment, since the prism body 11 may have a trapezoidal cross-sectional shape, the length b of the top edge, the height a, and the base angle θ may be selected 1 Obtaining the length of the bottom edge, or selecting the length, the height a and the bottom angle theta of the bottom edge 1 Since the top edge length is obtained, when the cross-sectional shape of the prism body 11 is a trapezoid, only one parameter is selected from the top edge length b and the bottom edge length. In addition, when the cross-sectional shape of the prism body 11 is selected to be trapezoidal, when the shortest distance c is from the top surface 113 of the prism body 11 to the surface 121 of the protective layer 12 along the direction of the height aIs a distance of (3). In other embodiments of the present application, the cross-sectional shape of the prism body 11 may also be triangular, in which case it is necessary to obtain the length of the base of the prism body 11, thereby combining the height a and the base angle θ 1 The structure of the prism body 11 is constructed.
And S12, determining an incident surface positioned on the prism body and an emergent surface positioned on the protective layer so as to determine the light diffusion distance formed in the prism structure after light rays enter from the incident surface and emerge from the emergent surface.
Specifically, since the protective layer 12 covers the prism body 11, the light beam passes through the protective layer 12 after passing through the prism body 11, and is emitted from the surface 121 of the protective layer 12, and thus, as shown in fig. 2, the surface 121 of the protective layer 12 is an emitting surface located on the protective layer 12. According to the relative positional relationship between the prism body 11 and the protective layer 12, light will be incident from the bottom surface of the prism body 11 and then exit from the surface 121 of the protective layer 12, so that the bottom surface 111 of the prism body 11 can be determined as a light incident surface, and the surfaces of the prism body 11 at other positions except the bottom surface 111 can be used for light to enter the protective layer 12 after exiting, so that when the cross-sectional shape of the prism body 11 is selected to be trapezoid, the light emergent surface of the prism body 11 comprises a side surface 112 and a top surface 113, the side surface 112 and the top surface 113 of the prism body 11 are both contacted with the protective layer 12, and the side surface 112 and the top surface 113 are both planar. When the cross-sectional shape of the prism body 11 is selected to be triangular, the light-emitting surface on the prism body 11 only includes a side surface 112, and the side surface 112 is a plane. By determining the light incident surface and the light emergent surface, it can be determined that after passing through the light incident surface on the prism body 11, the light emergent surface on the prism body 11, and the light emergent surface on the protective layer 12 in sequence, a corresponding light path is formed in the prism structure 10, and the light diffusion distance refers to the length of the light path distributed in the direction parallel to the surface 121 of the protective layer 12. This light diffusion distance may be used as a reference for measuring the ability of the prismatic structure 10 to modulate the angle of light exiting, i.e. when the light diffusion distance is greater, it means that the prismatic structure 10 can modulate light to a greater angle for exiting.
And S13, selecting the furthest diffusion distance from the light diffusion distances, and establishing a functional relation between the furthest diffusion distance and the structural parameters.
Referring to fig. 4, step S13 may specifically include the following steps:
step S131, selecting a target light ray from the light rays, wherein the target light ray is incident from the junction of the median line of the prism body and the light incident surface and exits from the exit surface at a preset angle.
Specifically, the light is generated by a light emitting device, so that the light can have different incident angles, wherein the preset angle θ 2 For a maximum light emission angle of a light emitting device (not shown), the preset angle θ for a single light emitting device 2 Is a constant value. In this embodiment, the light emitting device may be an electroluminescent device, and the maximum light emitting angle may be 45 °, so the preset angle θ 2 May be 45 °. In step S131, first, a predetermined angle θ is selected from the light rays having different incident angles 2 The incident light beam is then satisfied, so that the condition of entering from the intersection of the median line of the prism body 11 and the light incident surface and exiting from the light emergent surface is satisfied, and when the above conditions are satisfied, the corresponding target light beam is determined.
Step S132, determining the light diffusion distance formed by the target light in the prism structure to obtain the furthest diffusion distance.
In the present embodiment, since the light incident surface is the bottom surface 111 of the prism body 11, as shown in fig. 2, when the target light is at a predetermined angle θ 2 When entering from the junction of the median line of the prism body 11 and the bottom surface 111, light is emitted from the side surface 112 of the prism body 11, and therefore, the light emitting surface is the side surface 112 corresponding to the target light. The target light is refracted at the side surface 112 to form a corresponding incident angle theta on the side surface 112 3 And emergence angle theta 4 Eventually, when the target light reaches the surface 121 (i.e., the exit surface) of the protective layer 12, a corresponding light path is formed in the prism structure 10. The target light is known according to the principle of light diffusionThe length of the light path that is formed and distributed in the direction parallel to the surface 121 of the protective layer 12 is the furthest diffusion distance L.
Step S133, establishing the functional relation related to the preset angle, the farthest diffusion distance and the structural parameter.
Specifically, the furthest diffusion distance L is used as an objective function to establish a relationship with the preset angle θ 2 The furthest diffusion distance L and the structural parameter. From the trigonometric function and the snell's law, it can be calculated:
n 1 *sin(θ 1 -θ 2 )＝n 2 *sinθ 4 ；L＝[(a+0.5*b*tanθ 1 )/(1+tanθ 1 *tanθ 2 )]*tanθ 2 +{a+c-[(a+0.5*b*tanθ 1 )/(1+tanθ 1 *tanθ 2 )]}/tan(pi/2-θ 1 +θ 4 )；
by combining theta 4 ＝arcsin[(n 1 /n 2 ) * sin(θ 1 -θ 2 )]Substituted into L to obtain a functional relation F (a, b, c, θ) 1 ，θ 2 ) =l, thereby establishing a predetermined angle θ at the height a 2 Base angle theta 1 The top edge length b and the shortest distance c are independent variables, and the furthest diffusion distance L is a functional relationship of the dependent variables.
And S14, carrying out value taking on the structural parameters according to the functional relation to construct a target model of the prism structure according to the value taking result.
Specifically, the step S14 may specifically take the values of the structural parameters in two manners, please refer to fig. 5, wherein the first manner may include the following steps:
in step S141, the bottom edge length or the top edge length, the shortest distance and the height are respectively evaluated to make the furthest diffusion distance change along with the change of the bottom angle in the functional relation.
Specifically, in the actual process, since the prism structure 10 is processed in a film manner, the dimensions of the corresponding top edge length b, height a and shortest distance c are defined as oneThe height a is, for example, in a range of 20 μm to 30 μm, the top edge length b is in a range of 8 μm to 15 μm, and the shortest distance c is in a range of 2 μm to 3 μm. Therefore, the height a and the length b of the top edge are taken to be constant, for example, 26 μm for a, 8 μm for b, and 2 μm for c. And the preset angle theta 2 For a single light emitting device, the preset angle θ is the maximum light emitting angle of the light emitting device 2 Is a fixed value, the preset angle theta 2 May be 45 °. And refractive index n of prism body 11 1 And refractive index n of protective layer 12 2 Can be used as a constant value, e.g. n is set 1 1.45, n 2 1.6.
The values of the structural parameters are obtained, and the refractive indices (n 1 And n 2 ) The value of (a) is "a=26 μm, c=2 μm, θ 2 ＝45°，b＝8μm，n 1 ＝1.45，n 2 =1.6″ is substituted into the functional relation, and θ is made to be 1 =x such that there is only one independent variable (x) and one dependent variable (L) in the functional relation, resulting in:
L＝F(x)＝(26+4*tan(x))/(1+tan(x))+(2+24*tan(x))/(1+tan(x))/(tan(pi/2(x)-arcsin(0.9*sin((x)-pi/4)。
wherein when x is the base angle theta 1 Within a range (0, 180 °), L is also present, which varies with x.
Step S142, determining the corresponding base angle value when the furthest diffusion distance is at the maximum value.
Specifically, the functional relation F (x) may be input to Matlab or Python, and the range of x may be set, and the furthest diffusion distance L may be visually analyzed by taking L as the ordinate and x as the abscissa. By searching the peak value of the function image represented by F (x) in Matlab or Python, the maximum value obtained by L can be determined, and meanwhile, the corresponding value of x when the L takes the maximum value, namely the base angle theta, can be found 1 Is a value of (a). The functional relation F (x) may be derived, and when F' (x) =When 0, i.e., L takes the maximum value, the base angle θ can be determined by obtaining the value of x at this time 1 Is a value of (a). After step S142 is completed, the values of all the parameters in the structural parameters can be determined, and in the case that the structural parameters of the prism structure 10 are determined, the target model of the prism structure 10 is also determined.
This step S14 may also be performed in a second manner, which may include the steps of:
the first step is to set the length of the bottom edge or the length b of the top edge and the value range of the height a respectively, and to value the shortest distance c.
Specifically, in the actual process, since the prism structure 10 is processed in a film manner, the dimensions of the corresponding top edge length b, height a and shortest distance c are limited to a certain range, for example, the dimension of the height a is 20 μm to 30 μm, the dimension of the top edge length b is 8 μm to 15 μm, and the dimension of the shortest distance c is 2 μm to 3 μm. Therefore, the height a can be set to a value in the range of 20 μm to 30. Mu.m, and the top edge length b can be set to a value in the range of 8 μm to 15. Mu.m. The shortest distance c can be directly 2 μm from its size range because of its small size range. And the preset angle theta 2 For a single light emitting device, the preset angle θ is the maximum light emitting angle of the light emitting device 2 Is a constant value, the preset angle theta 2 May be 45 °. And refractive index n of prism body 11 1 And refractive index n of protective layer 12 2 Can be used as a constant value, e.g. n is set 1 1.45, n 2 1.6.
And a second step of: and determining the corresponding value of the base angle when the furthest diffusion distance obtains the maximum value according to the value range and the value of the shortest distance c.
Specifically, according to the shortest distance c, the preset angle θ 2 And refractive indices (n 1 And n 2 ) The value "c=2 μm, θ 2 ＝45°，n 1 ＝1.45，n 2 =1.6″ is substituted into the functional relation F, and the value according to the height aThe range and the range of the top edge length b are calculated by the functional relation F= (a, b, θ) 1 ) Performing linear programming to determine the corresponding base angle theta when the furthest diffusion distance L takes the maximum value 1 Is a value of (a). The height a and the top edge length b only need to be valued from the corresponding range of values, so that after the second step is finished, values of all parameters in the structural parameters can be obtained, and under the condition that the structural parameters of the prism structure 10 are determined, the target model of the prism structure 10 is also determined.
In fig. 2 of the embodiment of the present application, the cross-sectional shape of the prism body 11 is exemplified as a trapezoid to explain each step of the design method, but in other embodiments of the present application, the cross-sectional shape of the prism body 11 may be selected as a triangle to be exemplified, and only the difference is that when the cross-sectional shape of the prism body 11 is a triangle, the corresponding configuration parameter does not include the top edge length b. When the cross-sectional shape of the prism body 11 is triangular, the length of the base side of the prism body 11, the height a and the preset angle theta are related 2 And L can also obtain corresponding functional relation, so that the steps S11-S14 can be referred to construct a corresponding target model of the prism structure 10.
In the design method provided by the embodiment of the application, the function relation between the farthest diffusion distance and the structural parameter is established, in the function relation, the change of the farthest diffusion distance along with the structural parameter can be analyzed by taking the farthest diffusion distance as a dependent variable and taking the structural parameter as an independent variable, and the value of the structural parameter can be determined when the farthest diffusion distance obtains the maximum value, and the value result corresponding to the structural parameter is the optimal scheme in all design schemes when the farthest diffusion distance can be used for evaluating the light modulating capability of the prism structure, because the light can be diffused furthest. And the target model of the prism structure can be constructed according to the value result of the structural parameter, and the target model can modulate light rays to be emitted at a larger angle. In the embodiment of the application, the structural parameters of the prism structure are valued according to the established functional relation, so that the optimal scheme capable of modulating the light rays to emergent light at a large angle is selected from all the design schemes according to certain conditions, and all possible design schemes are prevented from being tried in an irregular and exhaustive mode, therefore, the application is beneficial to improving the construction efficiency of the target model of the prism structure.
The embodiment of the present application also provides a prism structure 10, which is designed and formed by the design method as described above.
Specifically, the structural parameters of the prism structure 10 include the height a of the prism body 11, and the base angle θ of the prism body 11 1 The above parameters, the length b of the top edge or the length c of the bottom edge (not shown) of the prism body 11 and the shortest distance c between the prism body 11 and the exit surface, can be determined by the above design method, and in the case that the structural parameters of the prism structure 10 are determined, the target model of the prism structure 10 is also determined, so that the prism structure 10 can be designed and molded by the above design method, and the light can be modulated to exit at a larger angle.
In addition to the embodiments described above, other embodiments of the application are possible. All technical schemes adopting equivalent replacement or equivalent replacement fall within the protection scope of the application.
In summary, although the preferred embodiments of the present application have been described above, the above preferred embodiments are not intended to limit the present application, and those skilled in the art can make various modifications and adaptations without departing from the spirit and scope of the present application, so that the scope of the present application is defined by the claims.
Claims (8)
1. The design method of the prism structure is characterized in that the prism structure comprises a prism body and a protective layer covered on the prism body; the design method comprises the following steps:
obtaining structural parameters of the prism structure;
determining an incident surface positioned on the prism body and an emergent surface positioned on the protective layer to determine a light diffusion distance formed in the prism structure after light rays are incident from the incident surface and emergent from the emergent surface;
selecting the furthest diffusion distance from the light diffusion distances, and establishing a functional relation between the furthest diffusion distance and the structural parameters;
the structural parameters are valued according to the functional relation, so that a target model of the prism structure is constructed according to the valued result;
the structural parameters comprise the length of the bottom edge or the length of the top edge of the prism body, the shortest distance from the prism body to the emergent surface, the height of the prism body and the bottom angle of the prism body; the selecting the furthest diffusion distance from the light diffusion distances and establishing a functional relation between the furthest diffusion distance and the structural parameters comprises the following steps:
selecting target light rays which are incident from the junction of the median line of the prism body and the light incident surface at a preset angle and are emitted from the emergent surface;
determining a light diffusion distance formed by the target light ray in the prism structure so as to obtain the furthest diffusion distance;
establishing the functional relation which is related to the preset angle, the furthest diffusion distance and the structural parameter;
wherein, the furthest diffusion distance L is taken as an objective function, and the relation of the preset angle theta can be established 2 A functional relationship of the furthest diffusion distance L and the structural parameter; from the trigonometric function and the snell's law, it can be calculated:
n 1 *sin(θ 1 -θ 2 )＝n 2 *sinθ 4 ；
L＝[(a+0.5*b*tanθ 1 )/(1+tanθ 1 *tanθ 2 )]*tanθ 2 +{a+c-[(a+0.5*b*tanθ 1 )/(1+tanθ 1 *ta
nθ 2 )]}/tan(pi/2-θ 1 +θ 4 )；
by combining theta 4 ＝arcsin[(n 1 /n 2 ) * sin(θ 1 -θ 2 )]Substituting into the input L yields the functional relation F (a,b，c，θ 1 ，θ 2 ) =l, thereby establishing a predetermined angle θ at the height a 2 Base angle theta 1 The top edge length b and the shortest distance c are independent variables, and the furthest diffusion distance L is a functional relationship of the dependent variables.
2. The method for designing a prism structure according to claim 1, wherein said evaluating the structural parameters according to the functional relation includes:
respectively taking values of the bottom edge length or the top edge length, the shortest distance and the height so that the furthest diffusion distance changes along with the change of the bottom angle in the functional relation;
and determining the value of the corresponding base angle when the furthest diffusion distance takes the maximum value.
3. The method for designing a prism structure according to claim 1, wherein said evaluating the structural parameters according to the functional relation includes:
setting the length of the bottom edge or the length of the top edge and the value range of the height respectively, and taking the value of the shortest distance;
and determining the value of the corresponding base angle when the furthest diffusion distance obtains the maximum value according to the value range and the value of the shortest distance.
4. The method of claim 1, wherein the predetermined angle is a maximum light emitting angle of a light emitting device.
5. A method of designing a prismatic structure according to claim 2 or 3, wherein said shortest distance is 2 μm.
6. The method of claim 1, wherein the surface of the prism body in contact with the protective layer comprises a plurality of flat surfaces.
7. The method of claim 1, wherein the prism body has a trapezoidal or triangular cross-sectional shape.
8. A prism structure, characterized in that the molding is designed by the design method according to any one of claims 1 to 7.
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| CN206990843U (en) * | 2017-07-11 | 2018-02-09 | 江苏双星彩塑新材料股份有限公司 | A kind of diffusion for backlight module adds lustre to complex optical film |
| CN109283684A (en) * | 2018-09-20 | 2019-01-29 | 国营芜湖机械厂 | The design method and prism of edge of transparent enclosed area observation prism based on Light tools emulation |
| CN111045256A (en) * | 2020-01-06 | 2020-04-21 | 京东方科技集团股份有限公司 | Backlight module and display device |
| CN111131804A (en) * | 2020-01-13 | 2020-05-08 | 深圳彩翼光电科技有限公司 | Light path turn-back system and construction method thereof |
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| CN206990843U (en) * | 2017-07-11 | 2018-02-09 | 江苏双星彩塑新材料股份有限公司 | A kind of diffusion for backlight module adds lustre to complex optical film |
| CN109283684A (en) * | 2018-09-20 | 2019-01-29 | 国营芜湖机械厂 | The design method and prism of edge of transparent enclosed area observation prism based on Light tools emulation |
| CN111045256A (en) * | 2020-01-06 | 2020-04-21 | 京东方科技集团股份有限公司 | Backlight module and display device |
| CN111131804A (en) * | 2020-01-13 | 2020-05-08 | 深圳彩翼光电科技有限公司 | Light path turn-back system and construction method thereof |
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