CN111703015A - Light guide plate manufacturing method, light guide plate and side-in type backlight module - Google Patents
Light guide plate manufacturing method, light guide plate and side-in type backlight module Download PDFInfo
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- CN111703015A CN111703015A CN202010579817.4A CN202010579817A CN111703015A CN 111703015 A CN111703015 A CN 111703015A CN 202010579817 A CN202010579817 A CN 202010579817A CN 111703015 A CN111703015 A CN 111703015A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 48
- 230000003287 optical effect Effects 0.000 claims abstract description 81
- 238000001746 injection moulding Methods 0.000 claims abstract description 60
- 239000000463 material Substances 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 19
- 102220486681 Putative uncharacterized protein PRO1854_S10A_mutation Human genes 0.000 claims abstract description 9
- 102220470087 Ribonucleoside-diphosphate reductase subunit M2_S20A_mutation Human genes 0.000 claims abstract description 6
- 239000002994 raw material Substances 0.000 claims description 18
- 238000003672 processing method Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 description 10
- 238000001816 cooling Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1615—The materials being injected at different moulding stations
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
- G02B6/0043—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided on the surface of the light guide
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0055—Reflecting element, sheet or layer
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0065—Manufacturing aspects; Material aspects
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2009/00—Layered products
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2011/00—Optical elements, e.g. lenses, prisms
- B29L2011/0075—Light guides, optical cables
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V2200/00—Use of light guides, e.g. fibre optic devices, in lighting devices or systems
- F21V2200/20—Use of light guides, e.g. fibre optic devices, in lighting devices or systems of light guides of a generally planar shape
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Manufacturing & Machinery (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Planar Illumination Modules (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention provides a method for manufacturing a light guide plate, which comprises the following steps: S10A: forming a reflective layer by injection molding; S20A: forming a light guide layer with a reflecting layer and a light guide layer by secondary injection molding by taking the reflecting layer as a base material; or, S10B: forming a light guide layer by injection molding; S20B: forming a light guide plate with a reflecting layer and a light guide layer by secondary injection molding by taking the light guide layer as a base material; the reflective layer side is provided with a first optical part, the light guide layer side is provided with a second optical part, and the first optical part and the second optical part are in concave-convex fit to form dots. A light guide plate comprises a reflection layer and a light guide layer which are laminated, wherein a first optical portion is arranged on one side of the reflection layer, a second optical portion is arranged on one side of the light guide layer, and the first optical portion is in concave-convex fit with the second optical portion. A side-in backlight module comprises a light guide plate. The light guide plate manufacturing method provided by the invention can be used for manufacturing the light guide plate with reflection, light guiding and light uniformizing functions, and the manufacturing efficiency of the light guide plate is improved.
Description
Technical Field
The invention belongs to the technical field of light guide, and particularly relates to a light guide plate manufacturing method, a light guide plate and a side-in type backlight module.
Background
The light guide plate is an optical structure for converting a point light source or a line light source into a surface light source. The manufacturing method of the light guide plate generally comprises the following steps: preparing an optical-grade acrylic plate, and cutting the plate into required light guide plates according to the size requirement. In addition, the bottom surface of the light guide plate is required to be formed with mesh points by silk-screen printing, laser or hot pressing. Therefore, the manufacturing process of the light guide plate is complex, and the production cycle is long.
Disclosure of Invention
The invention aims to provide a light guide plate manufacturing process to solve the technical problem of long production period caused by complex light guide plate manufacturing process in the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that:
in a first aspect, an embodiment of the present invention provides a method for manufacturing a light guide plate, including the following steps:
S10A: forming a reflective layer by injection molding;
S20A: forming a light guide layer with a reflecting layer and a light guide layer by secondary injection molding by taking the reflecting layer as a base material;
or, S10B: forming a light guide layer by injection molding;
S20B: forming a light guide plate with a reflecting layer and a light guide layer by secondary injection molding by taking the light guide layer as a base material;
the light guide layer is arranged on the light guide layer, the reflecting layer is arranged on one side of the reflecting layer, the light guide layer is arranged on one side of the light guide layer, and the first optical portion and the second optical portion are in concave-convex fit to form net points.
In a possible embodiment, in step S10A, the reflective layer is formed by injection molding of a molten first raw material; in step S20A, the light guide layer is formed by injection molding of the melted second raw material, and the light guide layer and the reflective layer are laminated together to form the light guide plate.
In a possible embodiment, in step S10B, the light guiding layer is formed by injection molding of a molten second raw material; in step S20B, the reflective layer is formed by injection molding of a molten first raw material, and the light guide layer and the reflective layer are laminated together to form the light guide plate.
In a possible embodiment, in steps S10A and S10B, a mold having a third optical portion is first manufactured by a laser processing method according to a preset requirement, and then the reflective layer and the light guide layer are injection-molded through the mold.
In a possible embodiment, the first optical portion includes a plurality of first concave points, the second optical portion includes a plurality of first convex points, and each first concave point is matched with each first convex point in a one-to-one correspondence manner.
In a possible embodiment, the first optical portion includes a plurality of second bumps, and the second optical portion includes a plurality of second concave points, and each second concave point is matched with each second bump in a one-to-one correspondence manner.
In a possible embodiment, the first optical portion includes a plurality of third pits and a plurality of third bumps, the second optical portion includes a plurality of fourth bumps and a plurality of fourth pits, each third pit is matched with each fourth bump in a one-to-one correspondence manner, and each third bump is matched with each fourth pit in a one-to-one correspondence manner.
In a possible embodiment, the reflecting layer is formed by injection molding of a white or milky non-transparent material, and the thickness of the reflecting layer is 0.3 mm-0.5 mm.
The light guide plate manufacturing method provided by the invention has the beneficial effects that: compared with the prior art, the light guide plate manufacturing method forms the reflecting layer in an injection molding mode, forms the light guide plate in a secondary injection molding mode, and ensures that the light guide plate comprises the reflecting layer and the light guide layer, and the mesh points are formed between the reflecting layer and the light guide layer, so that the light guide plate has the functions of reflecting, guiding and homogenizing simultaneously, namely, the reflecting sheet and the mesh points are manufactured together while manufacturing the light guide plate, the reflecting sheet is not required to be manufactured, the manufacturing and assembling processes of the reflecting sheet are cancelled, the cutting process of the light guide plate is cancelled, and the design and manufacturing process of the mesh points is cancelled, so that the manufacturing process steps of the light guide plate are greatly reduced, the design and production cycle of the light guide plate is greatly saved, and the efficiency is improved.
In a second aspect, an embodiment of the present invention provides a light guide plate manufactured by the above method, where the light guide plate includes a reflection layer and a light guide layer stacked together, the reflection layer has a first optical portion on one side, the light guide layer has a second optical portion on one side, and the first optical portion and the second optical portion are in concave-convex fit.
The light guide plate provided by the invention has the beneficial effects that: compared with the prior art, the light guide plate is integrally formed by secondary injection molding through the reflecting layer and the light guide layer, so that the matching degree of the reflecting layer and the light guide layer is high, the reflecting and light guide effects are better, and the assembly efficiency is high.
In a third aspect, an embodiment of the present invention provides a side-entry backlight module, including the light guide plate.
The side-in backlight module provided by the invention has the beneficial effects that: compared with the prior art, the side-in type backlight module has the advantages that the structure is simple, the assembly effect is high, and the occupied size is small due to the arrangement of the light guide plate.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic flow chart illustrating a method for manufacturing a light guide plate according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a light guide plate according to a first embodiment of the present invention;
FIG. 3 is a schematic top view of the light guide plate shown in FIG. 2;
fig. 4 is a schematic structural diagram of a side-in type backlight module according to an embodiment of the present invention;
fig. 5 is a schematic flow chart illustrating a manufacturing method of a light guide plate according to a second embodiment of the present invention;
fig. 6 is a schematic structural diagram of a light guide plate according to a second embodiment of the present invention;
fig. 7 is a schematic structural diagram of a light guide plate according to a third embodiment of the present invention.
Wherein, in the figures, the respective reference numerals:
10-a light guide plate; 20-a back plate; 30-a light source; 40-an optical film; 11-a reflective layer; 12-a light guiding layer; 111-a first optic; 121-a second optic; 1111-first pits; 1112-a second bump; 1113-third pit; 1114 — a third bump; 1211 — a first bump; 1212-second pits; 1213-fourth bump; 1214-fourth pit.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
The first embodiment is as follows:
referring to fig. 1 and fig. 2, a method for manufacturing a light guide plate according to the present invention will now be described. The method for manufacturing the light guide plate is used for manufacturing the light guide plate 10 with the functions of light guiding, light homogenizing and reflecting.
The manufacturing method of the light guide plate comprises the following steps:
S10A: forming a reflecting layer 11 by injection molding, the reflecting layer 11 having a reflecting action;
specifically, the reflective layer 11 is formed in a thin plate shape by injection molding of a molten first material through operations such as pressurization, injection, cooling, and release, wherein the first material is any plastic material having a reflective function.
S20A: forming a light guide plate 10 with a reflecting layer 11 and a light guide layer 12 by secondary injection molding by taking the reflecting layer 11 as a base material, wherein the light guide layer 12 has a light guide effect;
specifically, the reflective layer 11 is placed in an injection molding cavity, then the molten second raw material is injected into the injection molding cavity and positioned on one side of the reflective layer 11, and the light guide plate 10 with the reflective layer 11 and the light guide layer 12 is manufactured through operations such as pressurization, cooling, detachment and the like, and finally the light guide layer 12 and the reflective layer 11 are mutually pressed together along one direction. Wherein, the second raw material is any plastic material with light guide function.
The first optical portion 111 is arranged on one side of the reflecting layer 11, the second optical portion 121 is arranged on one side of the light guide layer 12, and the first optical portion 111 and the second optical portion 121 are in concave-convex fit to form dots.
Specifically, the first optical portion 111 is formed on the side of the reflective layer 11 during the first injection molding, the second optical portion 121 is formed on the side of the light guide layer 12 during the second injection molding, and the second optical portion 121 is formed by using the first optical portion 111 as a base material.
Here, the dots are concave-convex dot-shaped structures formed between light guide layer 12 and reflective layer 11 and used for homogenizing light.
According to the manufacturing method of the light guide plate, the reflecting layer 11 is formed in an injection molding mode, the light guide plate 10 is formed in a secondary injection molding mode, the light guide plate 10 comprises the reflecting layer 11 and the light guide layer 12, and the mesh points are formed between the reflecting layer 11 and the light guide layer 12, so that the light guide plate 10 has the functions of reflecting, guiding and homogenizing simultaneously, namely, the reflecting sheet and the mesh points are manufactured together while the light guide plate 10 is manufactured, the reflecting sheet does not need to be manufactured, the manufacturing and assembling process of the reflecting sheet is omitted, the cutting process of the light guide plate 10 is omitted, the design and manufacturing process of the mesh points is omitted, the manufacturing process steps of the light guide plate 10 are greatly reduced, the design and production cycle of the light guide plate 10 is greatly saved, and the efficiency is improved.
In a specific embodiment, in step S10A, a mold having a third optical portion is first manufactured by a laser processing method according to a preset requirement, the third optical portion and the first optical portion 111 can be matched in a concave-convex manner, and then the reflective layer 11 is formed by injection molding through the mold. Here, it should be noted that when the first optical portion 111 needs to be formed in the first injection molding, a corresponding third optical portion needs to be formed on a mold, and thus, when the injection molding is performed, the third optical portion is covered or filled with the molten first material, and the first optical portion 111 is formed.
In a specific embodiment, the first optical portion 111 includes a plurality of first concave points 1111, the second optical portion 121 includes a plurality of first convex points 1211, and each first concave point 1111 is matched with each first convex point 1211 in a one-to-one correspondence manner. Specifically, referring to fig. 3, the first pits 1111 are distributed on one side of the reflective layer 11 according to actual requirements and the first bumps 1211 are distributed on one side of the light guide layer 12 according to the same rules, wherein the sizes of the first pits 1111 and the first bumps 1211 can be further set according to actual optical requirements.
In practical application, in order to form the first concave points 1111 during the first injection molding, the third optical portion correspondingly includes a plurality of fifth convex points, the size and the position of each fifth convex point are set according to the design requirements of the first concave points 1111, and the first raw material covers each fifth convex point during the injection molding process, so as to form the first concave points 1111. In the second injection molding, the reflective layer 11 is used as a substrate, the melted second material is filled in the first concave points 1111 to form the first convex points 1211, and after the second injection molding, the first concave points 1111 and the first convex points 1211 are concave-convex matched, so that a dot with a light-homogenizing effect is formed at the boundary between the first concave points 1111 and the first convex points 1211.
In a specific embodiment, the reflective layer 11 is formed by injection molding of a milky non-transparent material, that is, the first raw material is a milky non-transparent material, so that the injection molded reflective layer 11 is a milky and opaque structure, and has a good reflective effect. It should be understood that, in other embodiments of the present invention, the reflective layer 11 may also be made of white non-transparent material, as long as it can achieve reflective effect and can be injection molded, and this is not limited herein.
In a specific embodiment, the thickness of the reflective layer 11 is 0.3mm, the reflective layer 11 mainly reflects light, so the thickness of the reflective layer 11 can be set to be thinner, but in order to meet the requirement of injection molding, and in order to meet the requirement of the reflective layer 11 as a substrate, the thickness of the reflective layer 11 is required, so the thickness of the reflective layer 11 is set to be 0.3mm, so the reflective requirement can be met, and the injection molding requirement can also be met. It is understood that in other embodiments of the present invention, the thickness of the reflective layer 11 may be 0.35mm, 0.4mm, 0.45mm, 0.5mm, etc., as long as it is in the range of 0.3mm to 0.5 mm.
In a specific embodiment, the light guide layer 12 is formed by injection molding optical grade acrylic, i.e. the second raw material is optical grade acrylic, which has a chemical name of methyl methacrylate and a specific gravity of 1190kg per cubic meter. Transparent acryl plate has very high luminousness, expands impact energy reinforce, makes leaded light layer 12 through this material, not only has good leaded light effect, and after the installation was used, shock-resistant.
Based on the same application concept, the embodiment also provides a light guide plate 10, and the light guide plate 10 is manufactured by the light guide plate manufacturing method. Specifically, referring to fig. 2, the light guide plate 10 includes a reflection layer 11 and a light guide layer 12 stacked together, wherein a first optical portion 111 is disposed on one side of the reflection layer 11, a second optical portion 121 is disposed on one side of the light guide layer 12, and the first optical portion 111 and the second optical portion 121 are in concave-convex fit. Light guide plate 10 in this embodiment is through the integrative injection moulding of reflector layer 11 and leaded light layer 12 for reflector layer 11 is high with leaded light layer 12 degree of cooperation, and reflection and leaded light effect are better, and assembly efficiency is high.
In a specific embodiment, the first optical portion 111 includes a plurality of first concave points 1111, the second optical portion 121 includes a plurality of first convex points 1211, and each first concave point 1111 is matched with each first convex point 1211 in a one-to-one correspondence manner. Specifically, the first pits 1111 are distributed on one side of the reflective layer 11 according to actual requirements according to a certain rule, and the first bumps 1211 are distributed on one side of the light guide layer 12 according to the same rule, wherein the size of the first pits 1111 and the size of the first bumps 1211 can be further set according to actual optical requirements.
Based on the same application concept, please refer to fig. 4, the embodiment further provides a side-in type backlight module, which includes a light guide plate 10, a back plate 20, a light source 30 and an optical film 40, wherein the light guide plate 10 is installed in the inner cavity of the back plate 20, the light source 30 is installed in the inner cavity of the back plate 20 and is disposed on the light incident side of the light guide plate 10, and the optical film 40 is installed on the light emergent side of the light guide plate 10. Specifically, the other side of the reflective layer 11 is disposed opposite to the bottom of the back plate 20, and the optical film 40 is mounted on the other side of the light guide layer 12. The side-in backlight module in this embodiment is provided with the light guide plate 10, so that the side-in backlight module has the advantages of simple assembly process, high assembly efficiency, more compact structure and small occupied volume.
Example two:
the difference between the method for manufacturing a light guide plate in the present embodiment and the method for manufacturing a light guide plate in the first embodiment is as follows: referring to fig. 5, in the present embodiment, the light guiding layer 12 is formed first, and then the reflective layer 11 is formed, which includes the following steps:
S10B: forming a light guide layer 12 by injection molding, wherein the light guide layer 12 has a light guide effect;
specifically, the light guide layer 12 is formed in a thin plate shape by injection molding of a molten second material through operations such as pressurization, injection, cooling, detachment, and the like, wherein the second material is any plastic material having a light guide function.
S20B: forming a light guide plate 10 with a reflecting layer 11 and a light guide layer 12 by secondary injection molding by taking the light guide layer 12 as a base material, wherein the reflecting layer 11 has a reflecting effect;
specifically, the light guide layer 12 is placed in an injection molding cavity, then a molten first raw material is injected into the injection molding cavity and positioned on one side of the reflecting layer 11, wherein the first raw material is any plastic material with a reflecting function, the light guide plate 10 with the reflecting layer 11 and the light guide layer 12 is manufactured through operations such as pressurization, cooling, separation and the like, and finally the light guide layer 12 and the reflecting layer 11 are mutually pressed together along one direction.
The first optical portion 111 is arranged on one side of the reflecting layer 11, the second optical portion 121 is arranged on one side of the light guide layer 12, and the first optical portion 111 and the second optical portion 121 are in concave-convex fit to form dots.
Specifically, the first optical portion 111 is formed on the reflective layer 11 side at the time of the first injection molding, the second optical portion 121 is formed on the optical layer side at the time of the second injection molding, and the first optical portion 111 is formed using the second optical portion 121 as a base material.
In a specific embodiment, in step S10B, a mold having a third optical portion is first manufactured according to a preset requirement by a laser processing method, the third optical portion and the second optical portion 121 can be matched in a concave-convex manner, and then the light guide layer 12 is formed by injection molding through the mold.
Example three:
the manufacturing method of the light guide plate in the present embodiment is the same as the manufacturing method of the light guide plate in the first embodiment, and the differences are as follows: referring to fig. 6, in the present embodiment, the first optical portion 111 includes a plurality of second bumps 1112, the second optical portion 121 includes a plurality of second concave points 1212, and each second concave point 1212 is in one-to-one correspondence with each second bump 1112. Second pits 1212 and second bumps 1112 are different from first pits 1111 and first bumps 1211 in name, and have the same structure, and second pits 1212 are distributed in the same manner as first pits 1111.
Correspondingly, in order to form each second bump 1112 in the first injection molding, the third optical portion correspondingly includes a plurality of fifth pits, the size and position of each fifth pit are set according to the design requirement of the second bump 1112, and the first raw material is filled in each fifth pit during the injection molding process, so as to form each second bump 1112. During the second injection molding, the reflective layer 11 is used as a base material, the melted second raw material is filled in each second bump 1112, so as to form each second concave point 1212, and after the molding, each second concave point 1212 and each second bump 1112 are in concave-convex fit, so that a dot with a light uniformizing effect is formed at a boundary between each second concave point 1212 and each second bump 1112.
Example four:
the manufacturing method of the light guide plate in the present embodiment is the same as the manufacturing method of the light guide plate in the first embodiment, and the differences are as follows: referring to fig. 7, in the present embodiment, the first optical portion 111 includes a plurality of third concave points 1113 and a plurality of third convex points 1114, the second optical portion 121 includes a plurality of fourth convex points 1213 and a plurality of fourth concave points 1214, each third concave point 1113 is in one-to-one correspondence with each fourth convex point 1213, and each third convex point 1114 is in one-to-one correspondence with each fourth concave point 1214. That is, in this embodiment, both the reflective layer 11 and the light guide layer 12 have pits and bumps thereon.
Correspondingly, in order to form the third pits 1113 and the third bumps 1114 during the first injection molding, the third optical portion correspondingly comprises a plurality of sixth bumps and a plurality of sixth pits, the size and the position of each sixth bump and each sixth bump are set according to the design requirements of the third pits 1113 and the third bumps 1114, and the first raw material is filled in each sixth pit and covers each sixth bump during the injection molding process, so that each third bump 1114 and each third pit 1113 are formed. In the second injection molding, the reflective layer 11 is used as a base material, the melted second material is filled in the third concave points 1113 and covers the third convex points 1114, so as to form fourth convex points 1213 and fourth concave points 1214, and after the molding, the third concave points 1113 are in concave-convex fit with the fourth convex points 1213, and the third convex points 1114 are in concave-convex fit with the fourth concave points 1214.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The manufacturing method of the light guide plate is characterized by comprising the following steps:
S10A: forming a reflective layer by injection molding;
S20A: forming a light guide layer with a reflecting layer and a light guide layer by secondary injection molding by taking the reflecting layer as a base material;
or, S10B: forming a light guide layer by injection molding;
S20B: forming a light guide plate with a reflecting layer and a light guide layer by secondary injection molding by taking the light guide layer as a base material;
the light guide layer is arranged on the light guide layer, the reflecting layer is arranged on one side of the reflecting layer, the light guide layer is arranged on one side of the light guide layer, and the first optical portion and the second optical portion are in concave-convex fit to form net points.
2. The method for manufacturing a light guide plate according to claim 1, wherein in step S10A, the reflective layer is formed by injection molding of a molten first raw material; in step S20A, the light guide layer is formed by injection molding of the melted second raw material, and the light guide layer and the reflective layer are laminated together to form the light guide plate.
3. The method for manufacturing a light guide plate according to claim 1, wherein in step S10B, the light guide layer is formed by injection molding of the melted second raw material; in step S20B, the reflective layer is formed by injection molding of a molten first raw material, and the light guide layer and the reflective layer are laminated together to form the light guide plate.
4. The method for manufacturing a light guide plate according to claim 1, wherein in steps S10A and S10B, a mold having a third optical portion is first manufactured by a laser processing method according to a predetermined requirement, and then the reflective layer and the light guide layer are injection-molded by the mold.
5. The method for manufacturing a light guide plate according to claim 1, wherein the first optical portion comprises a plurality of first concave points, the second optical portion comprises a plurality of first convex points, and each first concave point is matched with each first convex point in a one-to-one correspondence manner.
6. The method for manufacturing a light guide plate according to claim 1, wherein the first optical portion comprises a plurality of second bumps, the second optical portion comprises a plurality of second concave points, and each second concave point is matched with each second bump in a one-to-one correspondence manner.
7. The method for manufacturing a light guide plate according to claim 1, wherein the first optical portion comprises a plurality of third pits and a plurality of third bumps, the second optical portion comprises a plurality of fourth bumps and a plurality of fourth pits, each third pit is correspondingly matched with each fourth bump, and each third bump is correspondingly matched with each fourth pit.
8. The method for manufacturing a light guide plate according to any one of claims 1 to 7, wherein the reflective layer is formed by injection molding of a white or milky opaque material, and the thickness of the reflective layer is 0.3mm to 0.5 mm.
9. The light guide plate is characterized by being manufactured by the method for manufacturing the light guide plate according to any one of claims 1 to 8, the light guide plate comprises a reflecting layer and a light guide layer which are laminated, a first optical part is arranged on one side of the reflecting layer, a second optical part is arranged on one side of the light guide layer, and the first optical part and the second optical part are in concave-convex fit.
10. The edge-type backlight module, comprising the light guide plate according to claim 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010579817.4A CN111703015A (en) | 2020-06-23 | 2020-06-23 | Light guide plate manufacturing method, light guide plate and side-in type backlight module |
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| CN202010579817.4A CN111703015A (en) | 2020-06-23 | 2020-06-23 | Light guide plate manufacturing method, light guide plate and side-in type backlight module |
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Application publication date: 20200925 |