CN217443576U - Light guide plate mold core and light guide plate - Google Patents

Abstract

The utility model provides a light guide plate mould benevolence and light guide plate. The light guide plate mold core comprises a body, a first microstructure and a second microstructure. The body has a mold body molding surface. The first microstructure and the second microstructure are positioned on the die body molding surface and extend along a first direction, wherein the shortest distances from the end parts of the first microstructure and the second microstructure to the edge of the die body molding surface are respectively a first distance and a second distance, a first inclined section and a second inclined section are respectively formed at the joint of the end parts of the first microstructure and the second microstructure and the die body molding surface, and a first chamfer angle and a second chamfer angle are respectively formed between the first inclined section and the die body molding surface and between the second inclined section and the die body molding surface. The utility model discloses a light guide plate mould benevolence and light guide plate have heterotypic profile, and the micro-structure that forms on it can accord with processing demand and optical design demand respectively.

Description

Light guide plate mold core and light guide plate

Technical Field

The present invention relates to a mold insert and an optical device, and more particularly to a mold insert for a light guide plate and a light guide plate.

Background

At present, most of electronic devices utilize a flat display module to display images, and the technology of the liquid crystal display module is well-known and popular. However, since the display panel of the lcd module cannot emit light, the backlight module is disposed below the display panel to provide light for displaying images, and the light guide plate is an important component of the backlight module and is widely used in various electronic devices.

Generally, when a workpiece, i.e., a light guide plate mold core, used for producing a light guide plate is processed, there is a restrictive requirement on the setting range of the blank regions around the light guide plate mold core, so that when the light guide plate mold core is used for forming the optical microstructures of the light guide plate, the optical microstructures of the light guide plate can be formed to meet the required size according to the shape of the mold core.

Further, in the prior art, the shape of the mold insert for producing the light guide plate, i.e. the light guide plate, is not limited to a rectangle, but a special-shaped mold insert with a rounded rectangle, a same-side shear rectangle, and other shapes appears, and the microstructure on the surface of the special-shaped mold insert must be correspondingly adjusted, so that the optical microstructure of the formed light guide plate can meet the requirement.

The background section is only provided to aid in understanding the present invention, and therefore the disclosure in the background section may include some prior art that does not constitute a part of the knowledge of those skilled in the art. The disclosure in the "background" section does not represent a representation of the disclosure or of the problems that may be addressed by one or more embodiments of the inventions, which are known or appreciated by those skilled in the art prior to filing this application.

SUMMERY OF THE UTILITY MODEL

The utility model provides a light guide plate mould benevolence and light guide plate has heterotypic profile, and the micro-structure that just is formed on it can accord with processing demand and optical design demand respectively.

Other objects and advantages of the present invention can be obtained from the technical features disclosed in the present invention.

In order to achieve one or a part or all of the above or other objects, an embodiment of the present invention provides a light guide plate mold insert. The light guide plate mold core comprises a body, a first microstructure and a second microstructure. The body has a mold body molding surface. The first microstructure is located on the die body molding surface and extends along a first direction, wherein the shortest distance from the end of the first microstructure to the edge of the die body molding surface is a first distance, a first inclined section is formed at the joint of the end of the first microstructure and the die body molding surface, and a first cut angle is formed between the first inclined section and the die body molding surface. The second microstructure is positioned on the die body forming surface and extends along the first direction, wherein the shortest distance from the end part of the second microstructure to the edge of the die body forming surface is a second distance, a second inclined tangent plane is formed at the joint of the end part of the second microstructure and the die body forming surface, a second tangent angle is formed between the second inclined tangent plane and the die body forming surface, the first distance is greater than the second distance, and the first tangent angle is greater than the second tangent angle.

In order to achieve one or a part of or all of the above or other objects, an embodiment of the present invention provides a light guide plate. The light guide plate comprises a plate body, a first light guide microstructure and a second light guide microstructure. The plate body is provided with a first surface. The first light guide microstructures are located on the first surface and extend along the first direction, wherein the shortest distance from the end portions of the first light guide microstructures to the edge of the first surface is a first distance, first inclined planes are formed at the joint of the end portions of the first light guide microstructures and the first surface, and a first included angle is formed between the first inclined planes and the first surface. The second light guide microstructures are located on the first surface and extend along the first direction, wherein the shortest distance from the end portions of the second light guide microstructures to the edge of the first surface is a second distance, second inclined planes are formed at the joint of the end portions of the second light guide microstructures and the first surface, a second included angle is formed between each second inclined plane and the first surface, the first distance is greater than the second distance, and the second included angle is greater than the first included angle.

Based on the above, the embodiments of the present invention have at least one of the following advantages or effects. The embodiment of the present invention provides a light guide plate mold insert with irregular contour, which can meet the processing requirement when forming the microstructure thereon by limiting the relative relationship between the first microstructure and the second microstructure of the light guide plate mold insert. In addition, in the light guide plate formed by the light guide plate mold core, the light guide microstructures formed on the light guide plate mold core can also meet the optical design requirements.

In order to make the aforementioned and other features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1A is a front view of a light guide plate mold insert according to an embodiment of the present invention.

Fig. 1B is an enlarged view of a portion of the light guide plate mold core shown in fig. 1A.

Fig. 1C is a cross-sectional view of the microstructure of the light guide plate mold core shown in fig. 1A.

Fig. 1D is a schematic structural view of a light guide plate mold insert according to an embodiment of the present invention.

FIG. 1E is a schematic view of a light guide plate formed by using the light guide plate stamper of FIG. 1D.

Fig. 1F is a side view of the microstructures of the light guide plate of fig. 1E.

Fig. 2A is a front view of another light guide plate mold insert according to an embodiment of the present invention.

Fig. 2B is an enlarged view of a portion of the light guide plate mold core shown in fig. 2A.

List of reference numerals

100. 100A: light guide plate mould core

110. 110A: body

120: first microstructure

130: second microstructure

200: light guide plate

210: plate body

220: first light guide microstructure

230: second light guide microstructure

D1: a first direction

E1, E2: terminal end

L1: first distance

L2: second distance

MS 1: surface of the mold body

R: range of

S: side edge

S1: first surface

TC 1: first oblique tangent plane

TC 2: second oblique section

TS 1: first inclined plane

TS 2: second inclined plane

α 1: first corner of a corner

α 2: second corner cut

β 1: first included angle

Beta 2: and a second included angle.

Detailed Description

The foregoing and other technical and other features and advantages of the invention will be apparent from the following detailed description of a preferred embodiment, which proceeds with reference to the accompanying drawings. Directional terms as referred to in the following examples, for example: up, down, left, right, front or rear, etc., are simply directions with reference to the drawings. Accordingly, the directional terminology is used for purposes of illustration and is in no way limiting.

Fig. 1A is a front view of a light guide plate mold insert according to an embodiment of the present invention. Fig. 1B is an enlarged view of a portion of the light guide plate mold core shown in fig. 1A. Fig. 1C is a cross-sectional view of a microstructure of a mold insert of a light guide plate according to an embodiment of the present invention. Referring to fig. 1A to 1C, in the present embodiment, a light guide plate mold core 100 includes a body 110, a first microstructure 120, and a second microstructure 130. The body 110 has a mold body molding surface MS 1. Specifically, in the present embodiment, the contour of the body molding surface MS1 is a profiled contour, and is a rectangle having a triangular notch on one side, and as shown in fig. 1A and 1B, the contour of the body molding surface MS1 is a shape in which a corner cut is formed at least one of four corners of the rectangle.

As shown in fig. 1A and 1B, in the present embodiment, the first microstructure 120 and the second microstructure 130 are located on the mold body molding surface MS1 and both extend along the first direction D1. The second microstructure 130 is located in a range R between an extension line of one end E2 of a side S of the cavity molding surface MS1 away from the cavity molding surface MS1 in the first direction D1 and the side S of the cavity molding surface MS1 where the other end E1 of the cavity in the cavity molding surface MS1 is located. The first microstructure 120 is located outside the range R of the mold body molding surface MS1 where the second microstructure 130 is located. In addition, a plurality of first microstructures 120 and a plurality of second microstructures 130 are disposed on the light guide plate mold 100 and recessed into the mold molding surface MS 1. Specifically, in the present embodiment, the method for forming the first microstructure 120 and the second microstructure 130 on the mold body molding surface MS1 may be as follows.

Specifically, when the first microstructure 120 and the second microstructure 130 are formed on the mold cavity forming surface MS1, the range of the first microstructure 120 and the second microstructure 130 to be processed can be calculated according to the length and width of the mold cavity forming surface MS1 of the light guide plate mold 100. When the first microstructure 120 and the second microstructure 130 are processed, the feeding position, the lifting position, and the processing length of the first microstructure 120 and the second microstructure 130 formed on the mold body forming surface MS1 of the light guide plate mold 100 are set as required. Here, the above requirement refers to a restrictive requirement for a setting range of a blank region around the periphery of the light guide plate cavity 100 when the light guide plate cavity 100 is processed. The blank areas refer to areas of the mold body molding surface MS1 of the light guide plate mold 100 that are adjacent to the edges of the mold body molding surface MS1 but do not have the first microstructures 120 and the second microstructures 130, and the blank areas can be formed as follows: by controlling the first microstructure 120 and the second microstructure 130 based on different feed positions, tool lifting positions and machining lengths, the distance between the end portions of the first microstructure 120 and the second microstructure 130 and the edge of the mold body molding surface MS1 can be controlled, and further, the range formed by taking the connecting line of the end portions of the first microstructure 120 and the second microstructure 130 and the edge of the mold body molding surface MS1 as boundaries is controlled, which is the range of the blank regions. Moreover, when the light guide plate cavity 100 is processed, there is a restrictive requirement on the setting range of the blank area of the light guide plate cavity 100, so that the number of the second microstructures 130 whose size needs to be corrected can be further determined after the feeding position, the lifting position and the processing length of the first microstructures 120 and the second microstructures 130 are determined according to actual requirements. Finally, after setting or correcting the feeding, lifting and processing lengths of the corresponding positions of the first microstructure 120 and the second microstructure 130 in the processing program, the required processing parameters can be obtained and processed, and the first microstructure 120 and the second microstructure 130 with the following relative relationship can be obtained.

Specifically, as shown in fig. 1A and 1B, the length of the first microstructure 120 in the first direction D1 is greater than the length of the second microstructure 130 in the first direction D1, the shortest distance from the end of the first microstructure 120 to the edge of the mold body molding surface MS1 is a first distance L1, the shortest distance from the end of the second microstructure 130 to the edge of the mold body molding surface MS1 is a second distance L2, and the first distance L1 is greater than the second distance L2. As shown in fig. 1C, a first oblique cut surface TC1 is formed at a junction between an end of the first microstructure 120 and the mold body molding surface MS1, a first cut angle α 1 is formed between the first oblique cut surface TC1 and the mold body molding surface MS1, a second oblique cut surface TC2 is formed at a junction between an end of the second microstructure 130 and the mold body molding surface MS1, and a second cut angle α 2 is formed between the second oblique cut surface TC2 and the mold body molding surface MS 1. In the embodiment, the first tangential angle α 1 and the second tangential angle α 2 are obtuse angles, and the first tangential angle α 1 is greater than the second tangential angle α 2. Also, as shown in fig. 1C, the depth of the portion of the midpoint of the first microstructure 120 in the first direction D1 and the depth of the portion of the midpoint of the second microstructure 130 in the first direction D1 are the same as each other.

Further, as shown in fig. 1A and 1B, in the present embodiment, the shortest distances from the end portions of the second microstructures 130 to the edge of the mold body molding surface MS1 are the same. Also, as shown in fig. 1C, the depths of the portions of the midpoints of the plurality of second microstructures 130 in the first direction D1 are the same as each other, and the second chamfer angle α 2 of the plurality of second microstructures 130 is larger as the portions of the midpoints of the plurality of second microstructures 130 in the first direction D1 are farther from the edge of the body molding surface MS 1. In other words, as the portion of the midpoint of one of the plurality of second microstructures 130 in the first direction D1 is farther from the edge of the mold body molding surface MS1 than the portions of the midpoints of the other second microstructures 130 in the first direction D1, the second chamfer angle α 2 of the one second microstructure 130 which is farther from the edge of the mold body molding surface MS1 is larger.

Thus, the light guide plate formed by the light guide plate mold insert 100 may have corresponding features in structure due to the structural complementarity with the mold body molding surface MS1 of the light guide plate mold insert 100. Further explanation will be made below with reference to fig. 1D to 1F.

Fig. 1D is a schematic structural view of the light guide plate mold insert of fig. 1A. FIG. 1E is a schematic view of a light guide plate formed by using the light guide plate stamper of FIG. 1D. Fig. 1F is a side view of the microstructures of the light guide plate of fig. 1E. As shown in fig. 1D and 1E, the light guide plate 200 includes a plate body 210, a first light guide microstructure 220 and a second light guide microstructure 230, and the first light guide microstructure 220 and the second light guide microstructure 230 of the light guide plate have complementary shapes corresponding to the first microstructure 120 and the second microstructure 130 of the light guide plate mold 100. Specifically, in the present embodiment, the plate body 210 has a first surface S1. The first surface S1 is contoured in a rectangular shape having triangular missing corners on one side, that is, in a shape in which a corner cut is formed at least one of four corners of the rectangular shape. Moreover, the first light guiding microstructure 220 and the second light guiding microstructure 230 are located on the first surface S1 and both extend along the first direction D1. The light guide plate 200 includes a plurality of first light guide microstructures 220 and second light guide microstructures 230, and protrudes from the first surface S1.

Specifically, as shown in fig. 1E, in the present embodiment, the length of the first light guiding microstructure 220 in the first direction D1 is greater than the length of the second light guiding microstructure 230 in the first direction D1, the shortest distance from the end of the first light guiding microstructure 220 to the edge of the first surface S1 is a first distance L1, the shortest distance from the end of the second light guiding microstructure 230 to the edge of the first surface S1 is a second distance L2, and the first distance L1 is greater than the second distance L2.

As shown in fig. 1F, a first inclined surface TS1 is formed at a junction between an end of the first light guiding microstructure 220 and the first surface S1, a first included angle β 1 is formed between the first inclined surface TS1 and the first surface S1, a second inclined surface TS2 is formed at a junction between an end of the second light guiding microstructure 230 and the first surface S1, and a second included angle β 2 is formed between the second inclined surface TS2 and the first surface S1. In the embodiment, the first included angle β 1 and the second included angle β 2 are complementary angles of the first tangential angle α 1 and the second tangential angle α 2, respectively, and are acute angles, and the second included angle β 2 is greater than the first included angle β 1.

Further, as shown in fig. 1E, in the present embodiment, the shortest distances from the end of each second light guiding microstructure 230 to the edge of the first surface S1 are the same as each other, and as shown in fig. 1F, the heights of the portions of the midpoints of the plurality of second light guiding microstructures 230 in the first direction D1 are the same as each other, and the heights of the portions of the midpoints of the first light guiding microstructures 220 in the first direction D1 and the portions of the midpoints of the second light guiding microstructures 230 in the first direction D1 are also the same as each other. Moreover, since the second included angle β 2 is complementary to the second cut angle α 2, the second cut angle α 2 of the second microstructure 130 and the second included angle β 2 of the second light guiding microstructure 230 have opposite trend, and the second included angle β 2 of the second light guiding microstructures 230 is smaller when the middle point of the second light guiding microstructures 230 in the first direction D1 is farther away from the edge of the first surface S1. In other words, when the portion of the midpoint of one of the second light guiding microstructures 230 in the first direction D1 is farther from the edge of the first surface S1 than the portion of the midpoint of the other second light guiding microstructures 230 in the first direction D1, the second included angle β 2 of the second light guiding microstructure 230 that is farther from the edge of the first surface S1 is smaller.

Thus, by defining the relative relationship between the first microstructure 120 and the second microstructure 130 of the light guide plate mold 100, the light guide plate mold 100 having a profile can meet the processing requirements when forming the microstructures thereon. In addition, in the light guide plate 200 formed by the light guide plate mold 100, the light guide microstructures formed thereon can also meet the optical design requirements.

In addition, in the above embodiments, although the outline of the mold body forming surface MS1 of the light guide plate mold core 100 or the first surface S1 of the light guide plate 200 is illustrated as a rectangle with a triangle notch on one side, the present invention is not limited thereto, and in other embodiments, the outline of the mold body forming surface MS1 of the light guide plate mold core 100 or the outline of the first surface S1 of the light guide plate 200 may be other irregular outlines.

Fig. 2A is a front view of another light guide plate mold insert according to an embodiment of the present invention. Fig. 2B is an enlarged view of a portion of the light guide plate mold core shown in fig. 2A. Referring to fig. 2A and 2B, the light guide plate mold insert 100A of fig. 2A and 2B is similar to the light guide plate mold insert 100 of fig. 1A, and the differences are as follows. In the present embodiment, the profile of the mold body molding surface MS1 of the main body 110A of the light guide plate mold 100A is a rectangle with rounded corners at four edges. Thus, the profile of the first surface of the light guide plate (not shown) formed by the light guide plate mold 100A is also a rectangle with arc chamfers at the four corners.

In addition, in the embodiment, since the definition of the relative relationship between the first microstructure 120 and the second microstructure 130 of the light guide plate mold 100A is similar to the relative relationship between the first microstructure 120 and the second microstructure 130 of the light guide plate mold 100 in fig. 1A, the light guide plate mold 100A with the irregular profile can still meet the processing requirements when forming the microstructures thereon. In addition, in the light guide plate formed by the light guide plate mold 100A, the light guide microstructures formed thereon can also meet the optical design requirements.

In summary, the embodiments of the present invention have at least one of the following advantages or effects. The embodiment of the present invention provides a light guide plate mold insert with irregular contour, which can meet the processing requirement when forming the microstructure thereon by limiting the relative relationship between the first microstructure and the second microstructure of the light guide plate mold insert. In addition, in the light guide plate formed by the light guide plate mold core, the light guide microstructures formed on the light guide plate mold core can also meet the optical design requirements.

The above description is only a preferred embodiment of the present invention, and the scope of the present invention should not be limited thereto, that is, all the simple equivalent changes and modifications made according to the claims and the content of the specification should be included in the scope covered by the present invention. Furthermore, it is not necessary for any embodiment or claim of the invention to achieve all of the objects, advantages, or features disclosed herein. Furthermore, the abstract and the title of the specification are provided only for assisting the retrieval of patent documents and are not intended to limit the scope of the present invention. Furthermore, the terms "first", "second", and the like in the description or the claims are used only for naming elements (elements) or distinguishing different embodiments or ranges, and are not used for limiting the upper limit or the lower limit on the number of elements.

Claims (14)

1. A light guide plate mold insert is characterized by comprising a body, a first microstructure and a second microstructure, wherein the first microstructure and the second microstructure are arranged on the body

The body is provided with a die body molding surface;

the first microstructure is positioned on the die body molding surface and extends along a first direction, wherein the shortest distance from the end part of the first microstructure to the edge of the die body molding surface is a first distance, a first inclined tangent plane is formed at the joint of the end part of the first microstructure and the die body molding surface, and a first tangent angle is formed between the first inclined tangent plane and the die body molding surface; and

the second microstructure is located on the die body molding surface and extends along the first direction, wherein the shortest distance from the end of the second microstructure to the edge of the die body molding surface is a second distance, a second inclined tangent plane is formed at the joint of the end of the second microstructure and the die body molding surface, a second tangent angle is formed between the second inclined tangent plane and the die body molding surface, the first distance is greater than the second distance, and the first tangent angle is greater than the second tangent angle.

2. The light guide plate mold insert according to claim 1, wherein the light guide plate mold insert comprises a plurality of the second microstructures, the shortest distances from the end portions of the second microstructures to the edge of the mold body molding surface are the same, and the depths of the portions of the midpoint of the plurality of the second microstructures in the first direction are the same.

3. The light guide plate mold insert of claim 2, wherein the second chamfer angle of the plurality of second microstructures is larger as the portion of the midpoint of the plurality of second microstructures in the first direction is farther away from the edge of the mold body molding surface.

4. The light guide plate mold insert of claim 1, wherein the depth of the portion of the midpoint of the first microstructure in the first direction and the depth of the portion of the midpoint of the second microstructure in the first direction are the same as each other.

5. The mold insert of claim 1, wherein the first microstructures have a length in the first direction greater than a length of the second microstructures in the first direction.

6. The mold insert as claimed in claim 1, wherein the mold body has a rectangular molding surface with triangular notches on one side, or a rectangular molding surface with rounded corners on four edges.

7. The mold insert of claim 1, wherein the first and second microstructures are recessed into the molding surface of the mold body.

8. The light guide plate is characterized by comprising a plate body, a first light guide microstructure and a second light guide microstructure, wherein the first light guide microstructure and the second light guide microstructure are arranged on the plate body

The plate body is provided with a first surface;

the first light guide microstructures are located on the first surface and extend along a first direction, wherein the shortest distance from the end portions of the first light guide microstructures to the edge of the first surface is a first distance, first inclined surfaces are formed at the joints of the end portions of the first light guide microstructures and the first surface, and a first included angle is formed between the first inclined surfaces and the first surface; and

the second light guide microstructures are located on the first surface and extend along the first direction, wherein the shortest distance from the end portions of the second light guide microstructures to the edge of the first surface is a second distance, a second inclined plane is formed at the joint of the end portions of the second light guide microstructures and the first surface, a second included angle is formed between the second inclined plane and the first surface, the first distance is greater than the second distance, and the second included angle is greater than the first included angle.

9. The light guide plate according to claim 8, wherein the light guide plate comprises a plurality of the second light guiding microstructures, the shortest distances from the end portions of the second light guiding microstructures to the edge of the first surface are the same as each other, and the heights of the portions of the midpoints of the plurality of the second light guiding microstructures in the first direction are the same as each other.

10. The light guide plate according to claim 9, wherein the second included angle of the second light guiding microstructures is smaller as the portion of the midpoint of the second light guiding microstructures in the first direction is farther from the edge of the first surface.

11. The light guide plate according to claim 8, wherein the heights of the portions of the midpoints of the first light guiding microstructures in the first direction and the second light guiding microstructures in the first direction are the same as each other.

12. The light guide plate of claim 8, wherein the first light directing microstructures have a length in the first direction that is greater than a length of the second light directing microstructures in the first direction.

13. The light guide plate according to claim 8, wherein the first surface has a rectangular profile having a triangular missing corner on one side, or has a rectangular profile having a rounded chamfer on four corner edges.

14. The light guide plate of claim 8, wherein the first and second light directing microstructures protrude from the first surface.

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