CN112799166A - Light guide plate and manufacturing method thereof - Google Patents
Light guide plate and manufacturing method thereof Download PDFInfo
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- CN112799166A CN112799166A CN201911110416.8A CN201911110416A CN112799166A CN 112799166 A CN112799166 A CN 112799166A CN 201911110416 A CN201911110416 A CN 201911110416A CN 112799166 A CN112799166 A CN 112799166A
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- Prior art keywords
- guide plate
- light guide
- irregular
- substrate
- light
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 230000001788 irregular Effects 0.000 claims abstract description 53
- 239000000758 substrate Substances 0.000 claims abstract description 41
- 239000000463 material Substances 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000005323 electroforming Methods 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002344 surface layer Substances 0.000 claims description 3
- 238000010138 die striking Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 238000007731 hot pressing Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000010183 spectrum analysis Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention discloses a method for manufacturing a light guide plate, which comprises the following steps: preparing a light guide plate mold core with a plurality of irregular bulges; providing a base material; impressing the light guide plate mold core on the base material to form a mesh point area with a plurality of irregular second concave pits on the base material; and demolding to obtain the light guide plate. The invention also discloses a light guide plate which is formed by the manufacturing method of the light guide plate and comprises a body and a plurality of irregular second pits arranged on the same surface of the body, wherein the side surface of the body is a light incident surface, and the surface opposite to the surface with the plurality of irregular second pits is a light emergent surface. The light guide plate mold core is pressed on the substrate through the plurality of irregular raised light guide plate mold cores to obtain the light guide plate with the mesh point areas of the plurality of irregular enemy pits, and the number of the incident light rays which are vertically ejected after being deflected to the light emitting surface through the irregular second pits is increased, so that the brightness of the light guide plate is improved.
Description
Technical Field
The invention relates to the technical field of light guide plates, in particular to a light guide plate and a manufacturing method thereof.
Background
The light guide plate has the main function of changing a linear light source or a point light source into a uniform surface light source. The light guide plate is a key optical element for achieving the purpose, aims to guide light rays to a required direction to enable the light rays to achieve required brightness and uniformity, is a high-tech product which is newly developed in the 21 st century and converts a linear light source or a point light source into a surface light source, and is a digital light dot matrix (namely dot point) light guide plate manufactured by adopting a spectral analysis principle under the conditions of constant temperature, constant humidity and no dust so as to diffuse the light rays.
The traditional light guide plate is formed by pressing propylene into an acrylic plate with a smooth surface by an injection molding method and then hot-pressing the acrylic plate on a specific device by using a mold obtained by laser dotting. However, the method is complicated to operate, and the required equipment is high in price, such as the functions of the laser, the pulse energy and the dotting time during operation; meanwhile, the mold obtained by laser dotting forms dots with a circular or square shape or other regular patterns on the light guide plate to diffuse light (fig. 1), but the light guide plate with such patterns has emergent light deflected to the light guide plate body, and when in use, the screen brightness is not high, and the luminous efficiency is low.
The foregoing description is provided for general background information and is not admitted to be prior art.
Disclosure of Invention
The invention aims to provide a light guide plate for improving brightness and a manufacturing method thereof.
The invention provides a method for manufacturing a light guide plate, which is characterized by comprising the following steps:
preparing a light guide plate mold core with a plurality of irregular bulges;
providing a base material;
impressing the light guide plate mold core on the base material to form a mesh point area with a plurality of irregular second concave pits on the base material;
and demolding to obtain the light guide plate.
In one embodiment, in the step of preparing a light guide plate cavity having a plurality of protrusions, the method for preparing the light guide plate cavity includes:
providing an apparatus having a die;
providing a substrate;
moving the die head and the substrate relatively to form a plurality of first pits on the substrate to obtain a master plate;
and copying the master plate to obtain the light guide plate mold core with a plurality of irregular bulges.
In one embodiment, in the step of obtaining the light guide plate mold core with the plurality of irregular protrusions, the plurality of irregular protrusions are arranged in an array.
In one embodiment, in the step of relatively moving the die and the substrate, the substrate is metal, the die impacts the substrate, the relative movement includes movement of the die in a horizontal direction and a vertical direction, and the irregular first concave pits are used for increasing the quantity of light reflected to be emitted perpendicularly to a horizontal plane after being emitted to the surface of the die.
In one embodiment, in the step of copying the master, the copying is performed by electroforming.
In one embodiment, in the step of imprinting the light guide plate mold on the substrate: the mold core of the light guide plate is contacted with the substrate, then the mold core of the light guide plate is heated instantly by the electromagnetic module, the electromagnetic heating is carried out to 160-degree and 250-degree, the surface layer of the substrate is in a similar melting state, then the mold core of the light guide plate is pressed on the substrate, and then the mold core of the light guide plate is cooled instantly at room temperature of 20-degree.
The invention also provides a light guide plate, which is formed by the manufacturing method of the light guide plate according to claims 1 to 6, and comprises a body and a plurality of irregular second pits arranged on the same surface of the body, wherein the side surface of the body is a light incident surface, and the surface opposite to the surface with the plurality of irregular second pits is a light emergent surface.
In one embodiment, the irregular second concave pits increase the number of incident light beams which are vertically emitted after being deflected to the light emitting surface by the irregular concave pits.
In one embodiment, the plurality of irregular second recesses are arranged in an array.
According to the manufacturing method of the light guide plate, the light guide plate mold core is pressed on the substrate through the plurality of irregular raised light guide plate mold cores, the light guide plate with the mesh point areas of the plurality of irregular second pits is obtained, the number of incident light rays which are vertically ejected after being deflected to the light emitting surface through the irregular second pits is increased, and therefore the brightness of the light guide plate is improved.
Drawings
FIG. 1 is a schematic diagram of light transmission in a conventional light guide plate;
FIG. 2 is a flowchart illustrating steps of a method for fabricating a light guide plate according to an embodiment of the present invention;
FIG. 3 is a flowchart illustrating a method for fabricating a mold insert for a light guide plate according to an embodiment of the present invention;
FIG. 4 is a diagram illustrating irregular pits in a light guide plate according to an embodiment of the present invention;
FIGS. 5 a-5 c are flow charts of processes for forming dimples by impinging a substrate on a die in accordance with embodiments of the present invention;
FIG. 6 is a diagram of a mold insert for a light guide plate according to an embodiment of the present invention;
FIG. 7 is a schematic view of a light guide plate according to an embodiment of the present invention;
FIG. 8 is a schematic view illustrating the diffusion of light in a light guide plate according to an embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Referring to fig. 2 to 8, a method for manufacturing a light guide plate according to an embodiment of the present invention includes:
s10: preparing a light guide plate mold core with a plurality of irregular protrusions 11;
s20: providing a substrate 51;
s30: impressing the light guide plate mold on a substrate 51 to form a dot area with a plurality of irregular second pits 53 on the substrate;
s40: and demolding to obtain the light guide plate 5.
In step S10, a method of mechanical impact is used to prepare a mold insert for a light guide plate having a plurality of irregular protrusions 11, the method comprising:
s101: providing an apparatus having a die 7;
s102: providing a substrate 31;
s103: relatively moving the die head 7 and the substrate 31 to form a plurality of first pits 53 on the substrate 31 to obtain a master plate;
s104: and copying the master plate to obtain the light guide plate mold core with a plurality of irregular bulges 11.
In the present embodiment, the first recesses 33 are irregular first recesses 33, and the irregular first recesses 33 are arranged in an array. Specifically, as shown in fig. 4, the irregular first dimples 33 are drop-shaped.
In other embodiments, the irregular first recesses 33 are bowl-shaped or C-shaped or triangular.
In step S102, the substrate 31 is made of metal, such as steel plate, chrome plate or nickel plate.
In step S103: firstly, selecting an area, determining an initial coordinate, and impacting a substrate 31 by using a die head 7 to form irregular first pits 33 on the substrate 31; the substrate 31 is then moved horizontally to the next coordinate in an arrangement.
In practice, as shown in fig. 5a to 5c, the lower right corner in each figure indicates the direction of movement of the die 7 thereat, and the relative movement of the die 7 and the substrate 31 includes the relative movement of the die 7 in the horizontal direction and the up-and-down movement of the die 7 in the vertical direction. While moving up and down, the die 7 strikes the substrate 31 while moving horizontally to cut a first pit 33 in the substrate 31.
In step S104, the master plate is copied by electroforming.
The master 3 has a plurality of irregular first pits 33 and is arranged in an array. Therefore, the protrusions 11 of the light guide plate mold are irregular, and the dot structure of the light guide plate manufactured by using the light guide plate mold is different from the existing dot structure of a circular or other regular patterns, so that the quantity of light rays which are emitted to the surface and then reflected to be emitted vertically to the horizontal plane can be increased.
In step S20: cutting and polishing the raw materials according to the required size requirement of the light guide plate to obtain a base material 51, and cleaning the base material 51.
In step S30, the light guide plate mold is pressed on the substrate 51 by hot pressing. Specifically, the electromagnetic module for heating the light guide plate mold core is included, the light guide plate mold core is firstly contacted with the substrate 51, and a gap is formed between the light guide plate mold core and the substrate 51 because the light guide plate mold core is provided with a plurality of irregular protrusions 11; the light guide plate mold core and the base material 51 are sealed at the outer sides of the periphery of the contact surface of the light guide plate mold core and the base material 51, and air in the gap is pumped out before stamping, so that the space between the light guide plate mold core and the base material 51 is in a vacuum state, bubbles are not generated when the base material 51 is hot-stamped subsequently, and a second concave pit 53 formed by the base material is smooth.
Then the mold core of the light guide plate of the electromagnetic module is heated instantly, the electromagnetic heating is carried out to 160-degree and 250-degree, so that the surface layer of the base material 51 is in a similar melting state, and then the mold core of the light guide plate is pressed and printed on the base material 51; then, the light guide plate mold is instantly cooled to room temperature of 20 ℃, so that the surface of the substrate 51 is solidified from a molten state.
Referring to fig. 7 and 8, the embodiment of the invention further provides a light guide plate, the light guide plate 5 is formed by the above manufacturing method of the light guide plate, and includes a body 51 and a plurality of irregular second recesses 53 disposed on the same surface of the body 5. The side surface of the main body 51 is a light incident surface, and the surface opposite to the surface having the plurality of irregular second recesses 53 is a light emitting surface.
In the present embodiment, the irregular second recesses 53 are droplet-shaped, and the plurality of irregular second recesses 53 are arranged in an array.
In other embodiments, the irregular second recesses 53 are bowl-shaped or C-shaped or other shapes.
The irregular second concave pits 53 can increase the number of the incident light beams which are vertically emitted after being deflected to the light-emitting surface by the irregular second concave pits 53. Experiments prove that the brightness of the light guide plate with the irregular second pits 53 is improved by 5% compared with the light guide plate with the regular pits.
In the drawings, the size and relative sizes of layers and regions may be exaggerated for clarity. It will be understood that when an element such as a layer, region or substrate is referred to as being "formed on," "disposed on" or "located on" another element, it can be directly on the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly formed on" or "directly disposed on" another element, there are no intervening elements present.
In this document, the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for the purpose of clarity and convenience of description of the technical solutions, and thus, should not be construed as limiting the present invention.
As used herein, the ordinal adjectives "first", "second", etc., used to describe an element are merely to distinguish between similar elements and do not imply that the elements so described must be in a given sequence, either temporally, spatially, in ranking, or in any other manner.
As used herein, the meaning of "a plurality" or "a plurality" is two or more unless otherwise specified.
As used herein, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, including not only those elements listed, but also other elements not expressly listed.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (9)
1. A method for manufacturing a light guide plate is characterized by comprising the following steps:
preparing a light guide plate mold core with a plurality of irregular bulges;
providing a base material;
impressing the light guide plate mold core on the base material to form a mesh point area with a plurality of irregular second concave pits on the base material;
and demolding to obtain the light guide plate.
2. The method according to claim 1, wherein in the step of preparing a light guide plate mold insert having a plurality of protrusions, the method comprises:
providing an apparatus having a die;
providing a substrate;
moving the die head and the substrate relatively to form a plurality of first pits on the substrate to obtain a master plate;
and copying the master plate to obtain the light guide plate mold core with a plurality of irregular bulges.
3. The method as claimed in claim 2, wherein the step of obtaining the cavity of the light guide plate having the plurality of irregular protrusions is performed by arranging the plurality of irregular protrusions in an array.
4. The method of claim 2, wherein the step of moving the die relative to the substrate, the substrate being metal, the die striking the substrate, the relative movement including movement of the die in a horizontal direction and a vertical direction, the irregular first recesses increasing the amount of light reflected to a direction perpendicular to a horizontal plane after striking the surface of the die.
5. The method for manufacturing a light guide plate according to claim 2, wherein in the step of duplicating the master plate, the duplication is performed by electroforming.
6. The method according to claim 1, wherein the step of stamping the light guide plate stamper onto the substrate comprises: the mold core of the light guide plate is contacted with the substrate, then the mold core of the light guide plate is heated instantly by the electromagnetic module, the electromagnetic heating is carried out to 160-degree and 250-degree, the surface layer of the substrate is in a similar melting state, then the mold core of the light guide plate is pressed on the substrate, and then the mold core of the light guide plate is cooled instantly at room temperature of 20-degree.
7. A light guide plate, wherein the light guide plate is formed by the method according to claims 1 to 6, and comprises a body and a plurality of irregular second pits disposed on the same surface of the body, wherein the side surface of the body is a light incident surface, and the surface opposite to the surface having the plurality of irregular second pits is a light emitting surface.
8. The light guide plate according to claim 7, wherein the irregular pits increase the amount of incident light that is vertically emitted after being deflected toward the light-emitting surface by the irregular second pits.
9. The light guide plate according to claim 7, wherein the plurality of irregular second recesses are arranged in an array.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911110416.8A CN112799166A (en) | 2019-11-14 | 2019-11-14 | Light guide plate and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911110416.8A CN112799166A (en) | 2019-11-14 | 2019-11-14 | Light guide plate and manufacturing method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN112799166A true CN112799166A (en) | 2021-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911110416.8A Pending CN112799166A (en) | 2019-11-14 | 2019-11-14 | Light guide plate and manufacturing method thereof |
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|---|---|---|---|---|
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| JP2004314539A (en) * | 2003-04-18 | 2004-11-11 | Towa Corp | Processing method of mold for molding light guide plate, and mold and light guide plate |
| TWM264504U (en) * | 2004-06-29 | 2005-05-11 | Taiwan Creen Point Entpr Co Lt | Microstructures on a light guide plate |
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Application publication date: 20210514 |