KR101090572B1 - Microstructure diffusion plate - Google Patents

Abstract

The present invention provides a microstructured diffusion plate.

The microstructure diffuser plate of the present invention includes a substrate having a light incident surface and a light exit surface, and a plurality of unstructured portions covering the light exit surface. The plurality of unstructured portions include a first unstructured unit and a second unstructured unit such that the first unstructured unit has a first side surface, a second side surface, a top surface, a first spacing, a second spacing, and a height. Including, the first side and the second side have a first slope and a second slope; 1/2 ≦ 2H / (P1-P2) / 2 ≦ 9/5; Corresponds to. The second unstructured unit has a curved function shape, the second side of the second unstructured unit and the first unstructured unit forms a first low point, and the second unstructured unit and the first unstructured unit The first side forms the second low point. The first side surface and the second side surface of the first microstructure unit receive a light beam of a light source to form a first optical path, and the top surface of the first microstructure unit receives a light beam of a light source to form a second optical path. The second unstructured unit receives a light beam of the light source to form a third optical path.

Description

Microstructured Diffuser Plate {MICROSTRUCTURE DIFFUSION PLATE}

FIELD OF THE INVENTION The present invention relates to microstructured diffuser plates, and more particularly to microstructured diffuser plates having a plurality of optical structures.

At present, new generation display devices such as liquid crystal displays are already being actively researched and developed, and are gradually entering a stage to be used in the market. However, since the liquid crystal itself does not emit light, by the function of the backlight module, it is possible to provide a light source with a sufficient brightness and evenly distributed, thereby displaying the image normally. The basic principle is to convert a frequently used point or linear light source into a surface light source product having a uniform and high brightness using a simple and effective light mechanism. Generally, the direct type structure can raise the brightness and uniformity of a light source by the equalizing effect of the light of a diffuser plate, and the light condensing effect of a prism sheet by passing a reflective mask using the linear light source of a cold cathode tube.

At present, the technology of the diffuser plate is constantly evolving and its main purpose is to achieve the equalization of light rays. Research and development has been carried out from a conventional single prism structure. For example, in US Pat. No. 6606133, a diffuser plate in which both the light emitting surface and the light incident surface have an optical structure is shown (shown in FIG. 1). The diffusion plate 1A has a main body portion 2A, and a side surface of the main body portion 2A is a light incident surface, and another side surface facing each other is a light exit surface, and a prism is formed on the light exit surface. The structure 3A is formed, and a plurality of convex structures 4A are formed on the light incident surface. However, in the general manufacturing process, the manufacturing process of molding both surfaces has high difficulty, low pass rate of the finished product, and also causes problems when assembling the optical film. In addition, U.S. Patent No. 7255456 discloses two types of optical structures that are molded into the light exit surface of the diffusion plate, but the two types of optical structures are prism and lenticular, respectively. The plate has the following drawbacks. 1. The two types of structures have only a single optical action. Since the prism has only a spectral effect and the lenticular only has a diffused light effect, the effect of equalization that the combination of both can achieve is low. 2, Since the prism has a sharp point in structure, when assembled with other optical filters, the other prism occurs in other optical films, and the reliability of the product is inferior. 3, At the time of production, the sharp structure causes a problem in that the production yield of the diffusion plate is low or the molding of the diffusion plate is difficult.

In other words, the conventional diffuser cannot effectively raise the uniformity of light rays, and other problems such as low yield of combination and molding are common, making it difficult to further spread the use of the backlight module. MEANS TO SOLVE THE PROBLEM Since the present inventor felt that there existed room for improvement to the above-mentioned fault, the present invention is proposed in which the design can be improved reasonably and effectively.

[Prior Art Literature]

[Patent Document 1: US Patent No. 6606133 Specification]

[Patent Document 2: US Patent No. 7255456 Specification]

An object of the present invention is to provide a microstructured diffusion plate. The optical structure of two or more different structures is provided on the said unstructured diffuser plate, and a single optical structure can simultaneously provide two types of optical effects, spectral and diffused light, and can provide the light beam which has more uniformity. .

In order to achieve the above object, the present invention provides a microstructure diffuser plate including a light incident surface and a light exit surface, the light receiving surface receives the light rays of the light source. The unstructured diffuser plate includes a plurality of structural parts covering the light exit surface, the plurality of unstructured parts includes a first unstructured unit and a second unstructured unit, and the first unstructured unit includes: The first side and the second side have a first slope and a second side, respectively, including a first side, a second side, a top face, a first gap P1, a second gap P2, and a height H. Corresponding to the inclination, the first side and the second side are respectively located on both sides of the top surface, the second interval, the first side and the second side are respectively located on both sides of the light exit surface The first inclination and the second inclination are the following formulas, wherein the first inclination and the second inclination are the following formulas: 1 / 2≤2H / (P1-P2) / 2≤9 / 5; And the second unstructured unit has a curved function shape and is located on the light exit surface, the second unstructured unit and the first unstructured unit are adjacent to each other, and the second unstructured unit and the The second side surface of the first unstructured unit defines a first bottom, the first side surface of the second unstructured unit and another first unstructured unit forms a second bottom A low point and the second low point are located on the light exit surface, and when the plurality of microstructures receive the light beam of the light source, the first side surface and the second side surface of the first unstructured unit receive the light beam of the light source. And a first optical path, wherein the top surface of the first microstructure unit receives a light beam of the light source to form a second optical path, and the second microstructure unit receives a light beam of the light source, and receives a third optical path. Form an optical path.

The present invention also discloses a microstructure diffuser plate, including a light incident surface and a light exit surface, in which the light incident surface receives light rays from a light source. The unstructured diffusion plate includes a plurality of structural parts covering the light exit surface, and the plurality of unstructured parts include a first unstructured unit and a second unstructured unit, and the first unstructured unit includes: A first side surface, a second side surface, a top surface, a first interval P1, a second interval P2, and a height H, wherein the first side and the second side have a first slope and a second side, respectively. Corresponding to the inclination, the first side and the second side are respectively located on both sides of the top surface and the second interval, the first side and the second side are respectively located on both sides of the light exit surface, At the first interval, the height is set from the top surface to the light incident surface, and the first inclination and the second inclination are the following formulas: 1 / 2≤2H / (P1-P2) / 2≤9 / 5; The second unstructured unit includes a third side surface, a fourth side surface, and a second top surface, wherein the third side surface and the fourth side surface correspond to a third slope and a fourth slope, respectively. Further, the third side surface and the fourth side surface are located at both sides of the second top surface, respectively, so that the second unstructured unit and the first unstructured unit are adjacent to each other, and the first side of the second unstructured unit The third side and the second side of the first unstructured unit form a first bottom, the fourth side of the second unstructured unit and the first side of the first unstructured unit have a second bottom And the first low point and the second low point are located on the light exit surface, wherein the plurality of unstructured portions receive the light rays of the light source, The second side forms a first optical path, the second of the second unstructured unit A third side surface and the fourth side surface receive a light beam of the light source to form a second optical path, and the first top surface of the first microstructure unit receives a light beam of the light source to form a third optical path, The second top surface of the second microstructure unit receives a light beam of the light source to form a fourth optical path.

The present invention further provides a backlight module using the above-described microstructure diffuser plate.

This invention has the following advantageous effects. The optical structure proposed by the present invention can have the effects of diffused light and spectral at the same time. For example, spectroscopy is performed on the side of a trapezoid-like optical structure, and diffused light is performed on the top surface thereof. By combining two or more different types of optical structures at the same time, it is possible to achieve an effect of equalizing an excellent light.

BRIEF DESCRIPTION OF DRAWINGS To understand the features and technical contents of the present invention further, reference is made to the following detailed description of the invention and the accompanying drawings. However, the accompanying drawings are provided for reference and explanation only, and do not limit the present invention.

<Examples>

The present invention provides a microstructured diffusion plate 1. On the said non-structured diffuser plate 1, the optical structure of two or more different structures can be provided, and the spreading effect which has a favorable light uniformity can also be achieved. 2, 2A, 2B, and 2C are Embodiment 1 of the present invention. The unstructured diffuser plate 1 includes a light receiving surface 100 and a light emitting surface 101, and the light receiving surface 100 receives light rays (arrows in FIG. 2) of a light source. A feature of the present invention is that the first unstructured unit 121 and the second unstructured unit 122 in which a plurality of unstructured portions 120 formed on the light exit surface 101 are alternately arranged in a plurality of overlapping manners. Wherein, the two optical structures are structures having different contour shapes, and the two optical structures cause different optical effects on incident light rays, and the light incident surface 100 is a simple plane. This is in that the molding pass rate can be increased. Among them, the first unstructured unit 121 has a structure resembling a trapezoid, and the first unstructured unit 121 has a first side surface 1211A, a second side surface 1211B, and a top surface 1212A. The above-described structure may define the first interval P1, the second interval P2, and the height H. The first side surface 1211A and the second side surface 1211B are located at both sides of the top surface 1212A, respectively, and the first side surface 1211A and the second side surface 1211B each have a first slope. And a second slope, wherein the second spacing P2 is the distance between the first side surface 1211A and the second side surface 1211B, and the first spacing P1 is the first side surface and the Another distance between the second sides, the first spacing P1 is the maximum pitch between them, and the second spacing P2 is the minimum pitch between them. In addition, the height H is a distance from the top surface 1212A to the light incident surface 100. Moreover, based on the structure mentioned above, the said 1st inclination and the said 2nd inclination are the following formula: 1/2 <= 2H / (P1-P2) / 2 <= 9/5; By satisfying this, more excellent light emission aspect can be obtained.

In addition, the second unstructured unit 122 has a curved function shape and is located on the light exit surface 101. The second unstructured unit 122 and the first unstructured unit 121 are adjacent to each other, and both are alternately arranged to overlap each other. The second unstructured unit 122 and the second side surface 1211B of the first unstructured unit 121 form a first bottom point 131, and the second unstructured unit 122 The first side surface 1211A of one first unstructured unit 121 forms a second bottom 132, and the first bottom 131 and the second bottom 132 are formed on the light exit surface ( 101).

When the plurality of unstructured parts 12 receive light rays of the light source, the first side surface 1211A and the second side surface 1211B of the first unstructured unit 121 are light rays 30 of the light source. ) To form a first optical path, and the top surface 1212A of the first microstructure unit 121 receives a light beam of the light source 30 to form a second optical path, and the second microstructure unit 122 receives a light beam of the light source 30 to form a third optical path.

In a specific embodiment, the second unstructured unit 122 is a cone shaped structure. For example, a segment satisfying an equation of a circle, an ellipse, or a parabola, and the cone coefficient of the cone curve is less than or equal to -1 (≤), and the structure having the outline of the cone curve has the effect of diffused light of light rays. Can be provided.

In addition, since the outer edge of the top surface 1212A of the first unstructured unit 121 is a curve (shown in FIG. 2A) or a straight line (shown in FIG. 2B), it has two different types of structures described above. When two optical structures are described with respect to the light rays emitted from the light exiting surface 101, the effects of spectral and diffused light can be simultaneously generated. It should be noted that in FIG. 2A, the two optical structures have the same maximum pitch P (ie, both have the same pitch), and the maximum pitch P is between about 40 μm and 850 μm. In other words, a first pitch P is formed between the first low point 131 and the second low point 132, and a second pitch is formed between the second low point 132 and another first low point 131. (Ie, corresponds to the first interval P1 described above), and the first pitch and the second pitch are the same (P = P1). On the other hand, it is most preferable that the two optical structures are of the same height, but there may be a difference in height between the two optical structures, and the difference in height is preferably not more than 50%. For example, if the first unstructured unit 121 is 1, the height of the second unstructured unit 122 is approximately 0.5 to 1.5, so that the pass rate of the manufacturing process for molding the optical structure can be maintained. have.

As shown in FIG. 2B, with reference to the light rays, the top surface 1212A has the effect of diffused light (ie, the second optical path), and the two first and second side surfaces 1211A and 1211B on the left and right sides thereof. Since the first microstructure unit 121 has two kinds of optical properties because of having a spectral effect (that is, a first optical path), the first microstructure unit 121 is not simply capable of spectral or diffused light. When describing the light intensity, the spectral intensities of the first and second side surfaces 1211A and 1211B are greater than the diffused light intensity of the top surface 1212A. For example, if the incident light is 100, the spectral intensity is 51 and the diffused light intensity is 49. However, it is not limited to this. In addition, the second unstructured unit 122 generates the effect of the diffused light (that is, the third optical path).

As shown in FIG. 2A, when describing light rays, the curved top surface 1212A similarly has the effect of diffused light (that is, the second optical path), and two first and second side surfaces on the left and right sides thereof. 1211A and 1211B have spectroscopic effects (ie, the first optical path). Similarly, when it describes light intensity, the spectral intensity of the said 1st, 2nd side surface 1211A, 1211B is larger than the diffused light intensity of the said top surface 1212A. For this reason, in the above-described two kinds of embodiments, two different types of optical structures are molded on the light exit surface 101, among which the first unstructured unit 121 having a structure similar to a trapezoid is formed. When the second microstructure unit 122 having the diffused light effect (i.e., the third optical path) can be provided at the same time, the two unstructured units 122 having the diffused light effect (i.e., the third optical path) can be efficiently equalized and high It is possible to output a light beam having uniformity. FIG. 2C is a third embodiment of the first embodiment of the present invention, and the present embodiment changes FIG. 2A. Among them, on the light exiting surface 101, the third unstructured units 123 arranged in duplicate are formed, and the third unstructured units 123 are formed of the first unstructured units (see FIG. 2B). Similar to 121), the uniformity of the light beams can be increased by using a combination of the three different optical structures described above.

3 to 3B are Embodiment 2 of the present invention. What is different from Embodiment 1 is that this embodiment defines two or more types of optical structures on the light exit surface 101 of the microstructure diffuser plate 1 using different pitches. Hereinafter, various embodiments of the present embodiment will be described in detail. First, as shown in FIG. 2A, in the specific embodiment of the present invention, the first unstructured unit 121 ′ and the second unstructured unit 122 ′ have a structure that resembles a trapezoid in both. The first unstructured unit 121 'has a first side surface 1211A', a second side surface 1211B ', and a first top surface 1212A', and the above-described structure has a first spacing P1 and a second side. A gap P2 and a height H can be defined, and the first side 1211A 'and the second side 1211B' are located on both sides of the top surface 1212A ', respectively, and the first side 1211A 'and the second side surface 1211B' respectively correspond to a first slope and a second slope, and the second spacing P2 is the first side surface 1211A 'and the second side surface 1211B. ′) And the first spacing P1 is another distance between the first side and the second side. In the present embodiment, the first interval P1 is the maximum pitch between them, and the second interval P2 is the minimum pitch between them. In addition, the height H is the distance of the light incident surface 100 from the top surface 1212A ′, and based on the above-described structure, the first inclination and the second inclination are as follows. Formula: 1 / 2≤2H / (P1-P2) / 2≤9 / 5; By satisfying this, more excellent light emission form can be obtained. Similarly, the second unstructured unit 122 'has a third side surface 1221A', a fourth side surface 1221B ', and a second top surface 1222A', and the third side surface 1221A '. The fourth side surface 1221B 'corresponds to the third and fourth slopes, respectively, and the third side surface 1221A' and the fourth side surface 1221B 'are respectively the second top surface ( 1222A´) on both sides. The second unstructured unit 122 'and the first unstructured unit 121' are adjacent to each other and alternately arranged in duplicate, and the third side surface 1221A of the second unstructured unit 122 'is arranged. ′) And the second side surface 1211B ′ of the first unstructured unit 121 ′ form a first bottom 131 ′, and the fourth side surface of the second unstructured unit 122 ′. 1221B ') and the first side surface 1211A' of the first unstructured unit 121 'form a second low point 132', and the first low point 131 'and the second low point. 132 ′ is located on the light exit surface 101. When the plurality of microstructures 120 'receives the light rays of the light source 30, the first side 1211A' and the second side 1211B 'of the first nonstructure unit 121' A first optical path is formed, and the third side surface 1221A 'and the fourth side surface 1221B' of the second unstructured unit 122 'receive a light beam of the light source 30 to receive a second optical path. Form a path, and the first top surface 1212A 'of the first unstructured unit 121' receives a light beam of the light source 30 to form a third optical path, and the second unstructured unit The second top surface 1222A 'of 122' receives the light beam of the light source 30 to form a fourth optical path.

The difference between the first unstructured unit 121 'and the second unstructured unit 122' is that both have different maximum pitches. In a specific embodiment of the present invention, the second unstructured unit 122 'forms the second side 1211B' and the first bottom 131 'of the first unstructured unit 121'. In addition, the first side 1211A 'and the second bottom 132' of the first unstructured unit 121 'are formed. A first pitch P is formed between the first low point 131 ′ and the second low point 132 ′, and a second pitch is formed between the second low point 132 ′ and another first low point 131 ′. A pitch P1 is formed, and the first pitch and the second pitch are not the same. In other words, a first pitch P is formed between the first low point 131 ′ and the second low point 132 ′, and between the second low point 132 and another first low point 131. Forms a second pitch (corresponding to the first interval P1 described above), and for example, the first pitch P is equal to the second pitch P1, as P is 350 μm and P1 is 300 μm. (I.e., P ≠ P1). However, the range of the above-mentioned first pitch and second pitch is the same as that of Example 1, and is between about 40 micrometers and 850 micrometers. This embodiment uses a structure resembling a trapezoid having two different maximum pitches as described above, and likewise obtains a spectral side and a diffused light effect on the top surface, thereby outputting a light beam having more excellent uniformity. Can be. On the other hand, the first unstructured unit 121 'has a cone shape, and the cone coefficient of the cone curve is less than or equal to -1 (≤).

3B is a second embodiment in the present embodiment. 3A, the top surface 1212A 'of the first unstructured unit 121' is curved, and the radius of curvature of the curve is defined by the first unstructured unit 121 '. Is less than or equal to one interval P1 (≤), and the outer edge of the top surface 1222A 'of the second unstructured unit 122' is likewise curved and the radius of curvature of the curve is less than -1 It is the same (≤), and similarly, the side surface has a spectroscopy and the top surface has a diffused light effect, and the light beam which has a high uniformity can be output. In other words, the top surface 1222A 'of the second unstructured unit 122' may be curved or straight, and the top surface 1212A 'of the first unstructured unit 121' is also curved. Or it can be made straight.

In addition, according to the present invention, a third optical structure can be formed on the light exit surface 101. For example, the third optical structure may be an optical structure having a third maximum pitch, or a curved or straight line may be used on the top surface of the optical structure, and the outgoing light and the diffused light may be simultaneously used. The above-described optical structure is used to provide light rays with high uniformity. The other properties of this embodiment are the same as in Example 1, and are not described here again.

In addition, the above-described structure can be changed in consideration of the optical design. As shown in Fig. 4, when the microstructure diffuser 1 of the present invention is used in a fluorescent lamp such as CCFL or the like, the first microstructure unit 121 and the second microstructure unit 122 in the above-described Embodiment 1 are used. Alternatively, the third unstructured unit 123 forms a one-dimensional structure on the light exit surface 101 (FIG. 4 shows only the first unstructured unit 121 and the second unstructured unit 122). do). When the non-structured diffuser plate 1 is used as a light emitting diode or the like, the above-described optical structure is arranged overlappingly with the light exiting surface 101 to form a two-dimensional structure, and under the two-dimensional structure, The optical structure may be a convex body (FIG. 5 is a two-dimensional structure of the convex body of the optical structure of Example 1) or a concave structure (FIG. 5A is a two-dimensional structure of the concave portion of the optical structure of Example 2). can do. In other words, in different use situations, the above-described optical structure can change accordingly and at the same time achieve the output of light having a good equalizing effect. Similarly, the microstructured diffuser plate 1 in other embodiments can also achieve the object of generating equalized light rays by changing to a one-dimensional or two-dimensional structure.

6 shows the internal composition and structure of the microstructured diffusion plate 1 of the present invention. It includes a main layer 10, a bottom layer 11 provided below the main layer 10, and an unstructured layer 12 provided above the main layer 10, the microstructure diffusion plate of the present invention (1) is a layered sandwich structure. Among them, the main layer 10 is made of polystyrene (PS) or polycarbonate (PC), and in the main layer 10, the diffusion particles 20 can further equalize light rays. Most preferably included. The bottom layer 11 and the microstructured layer 12 are provided below and above the main layer 10, respectively, and are made of polystyrene (PS) or methyl methacrylate (Methylmethacrylate styrene). In addition, the bottom layer 11 and the microstructure layer 12 further include ultraviolet light absorbing particles 21, so that the ultraviolet light in the light source itself or the external light rays can be absorbed. The problem that sulfidation occurs in the microstructured diffusion plate 1 can be prevented. In addition, although the above-described optical structure is molded to the surface of the microstructured layer 12 (ie, the light exit surface 101), the number of layers constituting the above-described material or the microstructured diffuser plate 1 will be described. It merely uses for the purpose, and does not limit the present invention by this.

In addition, FIG. 7 is a result of the optical simulation of the light uniformity performed by the present invention on the microstructure diffuser of the prior art and the microstructure diffuser 1 of the present invention. Among them, each curve represents the cross-sectional strength. Curve 1 is the light intensity using two CCFL light sources and not using a diffuser plate. As can be seen from the above, since the two CCFLs are installed at positions of approximately 40 mm and 80 mm, the light intensity concentrates at the two positions, and the light intensity away from the two positions is drastically lowered, and the light beam is equalized. It is not. Curve 2 shows a diffuser plate provided with sharp prism on the two light sources. However, curve 2 clearly shows waves and wavers on the light intensity, and the uniformity is not ideal. Curve 3 shows a composite structural diffuser (i.e., US Pat. No. 7,255,456, referred to in the prior art), with a sharp prism and lenticular on the two light sources. Is changed in accordance with the distance of the light source of the CCFL, and is a position of relatively high intensity. Curves 4 and 5 are changes in the strength of the microstructure diffuser 1 using Examples 1 and 2 of the present invention, and as can be seen from the relative positions of the curves, 1) can greatly increase the uniformity of light rays, and the intensity of light rays is not influenced by the position of the CCFL light source, and maintains substantial uniformity. Therefore, the microstructure diffuser plate 1 of the present invention is conventionally diffused. Compared to a plate, it can be said that it can output light rays with higher uniformity.

In addition, based on the above-described experiment of the light intensity, the present invention can provide a light beam having a very high uniformity, so in actual use, the microstructured diffusion plate 1 proposed by the present invention has two separate diffusions. By combining the plates, it can be used as the final product. In comparison, since the existing diffusion plate cannot be used as a product without combining three diffusion plates, the present invention is superior in performance to the existing diffusion plates even in view of the effect of equalization or production cost. Have

8 and 8A show the backlight module 3 of the microstructure diffuser plate 1 according to the present invention. FIG. 8 is a backlight module 3 using the first embodiment, and FIG. 8A is a backlight module 3 using the second embodiment. The backlight module 3 includes at least one light source 30 and the above-described microstructure diffuser plate 1, and the microstructure diffuser plate 1 is provided above the light source 30, and the light source By providing 30 further in the space formed by the reflective structure 31, it is possible to generate light rays having higher luminance. The light source 30 may be a cold cathode fluorescent lamp (CCFL), a light emitting diode (LED), a flat fluorescent lamp (FFL), an external electrode fluorescent lamp (EEFL), a hot cathode fluorescent lamp (HCFL), or any other kind of light source. have. The features of the non-structured diffusion plate 1 are the same as in the above-described embodiment, and are not described herein again.

As described above, the present invention has the following advantages. Since the optical structure described above can have the effects of diffused light and spectroscopy at the same time, it can perform spectroscopy on the side of the trapezoid-like optical structure, and diffuse light on its top surface. It is possible to reduce the problem of interference fringes by simultaneously combining two or more different types of optical structures. For this reason, the microstructured diffuser plate of the present invention can obtain an effect of substantially equalizing light. On the other hand, the microstructured diffusion plate structure proposed by the present invention can output light having a very high uniformity, and therefore, when used in combination with other optical films, the number of other films can be reduced. For example, the conventional diffuser plate required the use of three diffuser plates, but the microstructured diffuser plate of the present invention requires only two diffuser plates. In other words, the microstructured diffusion plate of the present invention can effectively lower the manufacturing cost of the final product (for example, a display), and further increase the use value of the microstructured diffusion plate of the present invention. In addition, a prism is provided on an existing diffuser plate, and the prism has a sharp structure in front of the diffuser plate, and this structure has a structure in which the optical film on the diffuser plate is scratched or damaged by friction. It causes a problem. On the contrary, since the top surface of the structure of the present invention is flat or curved, the problem caused by the prism structure can be solved.

The above is description of the Example of this invention, and does not limit the claim of this invention. All changes which have the same effect of applying the specification of the present invention and the accompanying drawings shall be included in the claims of the present invention.

1 is a schematic diagram of a diffuser plate structure of the prior art.

2 is a schematic view of Embodiment 1 of a microstructured diffuser plate of the present invention.

2A is an enlarged view of a portion A in FIG. 1.

2B is a schematic diagram of the second embodiment in Example 1. FIG.

2C is a schematic diagram of the third embodiment in Example 1. FIG.

3 is a schematic view of Embodiment 2 of a microstructure diffuser plate structure of the present invention.

3A is an enlarged view of a portion B in FIG. 2.

3B is a schematic diagram of the second embodiment in Example 2. FIG.

4 is a schematic diagram of a one-dimensional structure as in Embodiment 1. FIG.

5 is a schematic diagram of a two-dimensional structure as in Embodiment 1. FIG.

5A is a schematic diagram of a two-dimensional structure in Embodiment 2. FIG.

6 is a structural schematic diagram of the microstructured diffusion plate of the present invention.

7 is an optical simulation diagram of the light emission uniformity of the microstructured diffusion plate of the present invention and the conventional diffusion plate.

8 is a schematic diagram of a backlight module using the microstructured diffusion plate of Example 1. FIG.

8A is a schematic diagram of a backlight module using the microstructure diffuser plate of Example 2. FIG.

[Description of Symbols for Main Parts of Drawing]

1A diffuser plate 2A main body

3A Prism Structure 4A Convex Structure

1 Unstructured Diffusion Plate 10 Main Layer

100 light-emitting surface 101 light-emitting surface

11 Bottom layer 12 Unstructured layer

120, 120´ Unstructured 121, 121´ First Unstructured Unit

1211A, 1211A´ First Side 1211B, 1211B´ Second Side

1212A, 1212A´ Top surface 122, 122´ Second unstructured unit

1221A´ Third Side 1221B´ Fourth Side

1222A´ Top 2 surface 123 Third unstructured unit

131, 131´ 1st low 132, 132´ 2nd low

20 Diffusion Particles 21 Ultraviolet Light Absorbing Particles

3 Backlight Module 30 Light Source

31 Reflective structure P1 first spacing

P2 Second Spacing P Second Pitch

Claims (10)

Including a light incident surface and a light emitting surface, the light receiving surface is a microstructure diffuser plate that receives the light rays of the light source, The unstructured diffusion plate includes a plurality of structural portions covering the light exit surface, The plurality of structural parts include a first unstructured unit and a second unstructured unit, and the first unstructured unit includes a first side surface, a second side surface, a top surface, a first gap P1, and a second gap (P2) and height (H), wherein the first side and the second side correspond to the first inclination and the second inclination, respectively, and the first side and the second side are respectively Both sides and at the second interval, the second interval being the minimum pitch between the first side and the second side, wherein the first side and the second side are located on both sides of the light exit surface, respectively. And at the first interval, the first interval is the maximum pitch between the first side and the second side, and at the height from the top surface to the light incident surface, Among them, the first inclination and the second inclination are the following formulas: 1 / 2≤2H / ((P1-P2) / 2) ≤9 / 5; Satisfying, The second unstructured unit has a curved function shape and is located on the light exit surface, the second unstructured unit and the first unstructured unit are adjacent, and the second unstructured unit and the first The second side surface of the first unstructured unit forms a first low point, the first side surface of the second unstructured unit and another first non-structured unit forms a second low point, and A first low point and the second low point are located on the light exit surface, When the plurality of structural parts receive the light rays of the light source, the first side surface and the second side surface of the first microstructure unit receive the light rays of the light source to form a first optical path, and the first microstructure The top surface of the unit receives a light beam of the light source to form a second optical path, and the second microstructure unit receives a light beam of the light source to form a third optical path. plate. The method according to claim 1, And the second unstructured unit has a conical curve shape, and the cone coefficient of the cone curve is less than or equal to -1 (≤). The method according to claim 1, The top surface of the first unstructured unit is all of the convex portion or concave portion, characterized in that the unstructured diffuser plate. The method according to claim 1, The second unstructured unit forms the second side surface of the first unstructured unit and the first bottom point, and forms another first side surface of the first unstructured unit and the second low point, Forming a first pitch between the first low point and the second low point, forming a second pitch between the second low point and another first low point, and wherein the first pitch and the second pitch are not equal. A microstructure diffuser plate characterized by the above-mentioned. The method according to claim 1, And the top surface of the first unstructured unit is curved or flat. A light emitting surface and a light emitting surface, wherein the light receiving surface is a microstructure diffuser plate that receives the light of the light source, The unstructured diffusion plate includes a plurality of structural portions covering the light exit surface, The plurality of structural parts include a first unstructured unit and a second unstructured unit, and the first unstructured unit includes a first side surface, a second side surface, a top surface, a first gap P1, and a second gap (P2) and height (H), wherein the first side and the second side correspond to the first inclination and the second inclination, respectively, and the first side and the second side are respectively Both sides and at the second interval, the second interval being the minimum pitch between the first side and the second side, wherein the first side and the second side are located on both sides of the light exit surface, respectively. And at the first interval, the first interval is the maximum pitch between the first side and the second side, and at the height from the top surface to the light incident surface, Among them, the first inclination and the second inclination are the following formulas: 1 / 2≤2H / ((P1-P2) / 2) ≤9 / 5; Satisfying, The second unstructured unit includes a third side surface, a fourth side surface and a second top surface, wherein the third side surface and the fourth side surface correspond to a third slope and a fourth slope, respectively, and the third The side surface and the fourth side surface are respectively located on both sides of the second top surface, the second unstructured unit and the first unstructured unit are adjacent, and the third side surface and the first side of the second unstructured unit The second side of the first unstructured unit defines a first bottom, the fourth side of the second unstructured unit and the first side of the first unstructured unit form a second bottom A first low point and the second low point are located on the light exit surface, Among them, when the plurality of structural parts receive light rays of the light source, the first side surface and the second side surface of the first unstructured unit receive light rays of the light source to form a first optical path, and the second The third side surface and the fourth side surface of the unstructured unit receive a light beam of the light source to form a second optical path, and the first top surface of the first unstructured unit receives a light beam of the light source; And forming a path, wherein the second top surface of the second unstructured unit receives a light beam of the light source to form a fourth optical path. The method according to claim 6, The second unstructured unit forms the second side surface of the first unstructured unit and the first bottom point, and forms another first side surface of the first unstructured unit and the second low point, Forming a first pitch between the first low point and the second low point, forming a second pitch between the second low point and another first low point, and wherein the first pitch and the second pitch are not equal. A microstructure diffuser plate characterized by the above-mentioned. The method according to claim 6, And the first unstructured unit and the second unstructured unit are both convex portions or concave portions. The method according to claim 6, And the top surface of the first unstructured unit is curved or flat. The method according to claim 6, And the top surface of the second unstructured unit is curved or flat.

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