CN109483886B - Polarized light source for liquid crystal display 3D printing - Google Patents
Polarized light source for liquid crystal display 3D printing Download PDFInfo
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- CN109483886B CN109483886B CN201811570977.1A CN201811570977A CN109483886B CN 109483886 B CN109483886 B CN 109483886B CN 201811570977 A CN201811570977 A CN 201811570977A CN 109483886 B CN109483886 B CN 109483886B
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 57
- 238000010146 3D printing Methods 0.000 title claims abstract description 22
- 230000010287 polarization Effects 0.000 claims abstract description 145
- 230000001105 regulatory effect Effects 0.000 claims abstract description 27
- 238000009987 spinning Methods 0.000 claims abstract 2
- 230000003287 optical effect Effects 0.000 claims description 18
- 238000002310 reflectometry Methods 0.000 claims description 4
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 239000002699 waste material Substances 0.000 abstract description 3
- 239000010408 film Substances 0.000 description 43
- 239000007788 liquid Substances 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000000016 photochemical curing Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
- B29C64/264—Arrangements for irradiation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
Abstract
The invention relates to a polarized light source for liquid crystal display 3D printing, which solves the problems that 50% of light energy irradiated into a liquid crystal display by a light source of an existing liquid crystal display 3D printer is absorbed by a polarized film and the light energy utilization rate is low. The device comprises a polarization regulating plate, wherein a light source is arranged on the incident side of the polarization regulating plate, a liquid crystal screen is arranged on the emergent side of the polarization regulating plate, the polarization regulating plate comprises first polarization modules and second polarization modules which are distributed alternately, a polarization film is obliquely arranged in the first polarization modules, a reflecting film is obliquely arranged in the second polarization modules, the reflecting film and the polarization film are parallel to each other, and a spinning piece is arranged on the emergent side of the first polarization modules or the second polarization modules. Before the light source enters the liquid crystal screen, the light source is arranged into unidirectional light which can pass through the polarizing film of the liquid crystal screen through the adjustment of the polarizing adjusting plate, so that the waste of light energy is reduced, and the energy consumption is saved.
Description
Technical Field
The invention belongs to the field of 3D printing, relates to a 3D printing light source, and particularly relates to a polarized light source for 3D printing of a liquid crystal screen.
Background
The polarization splitting film is made by utilizing the polarization effect of the film when light obliquely enters. The polarization splitting film can be divided into two types of prism type and plate type. Prismatic polarizing films utilize the polarizing effect of the interface at Brewster's angle of incidence. When the light beam always enters the interface of two materials at the Brewster angle, no matter how many layers of the thin film exist, the reflected light vibrating in the horizontal direction is always zero, the light vibrating in the vertical component is increased along with the increase of the layers of the thin film, so long as the layers are enough, the light vibrating in the parallel direction of the transmitted light beam can be realized, and the reflected light beam is the light vibrating in the vertical direction basically, thereby achieving the purpose of polarization beam splitting. The flat polarizing film is mainly manufactured by using the difference in reflection band width of two polarization components of the dielectric reflecting film at the time of oblique incidence. In general, a highly reflective film, as the incident angle increases, the reflection bandwidth of the perpendicular component gradually increases, while the bandwidth of the parallel component gradually decreases. Selecting the high reflection region for the vertical component and the high transmission region for the parallel component as the active regions can constitute a polarizing film that reflects the vertical component through the parallel component, with the angle of incidence of such a polarizing film generally being selected to be near the brewster angle of the substrate. The working wavelength range of the prism type polarizing film is wider, the polarization degree can be higher, but the preparation is more troublesome, the preparation is not easy to be large, and the laser resistance is lower. The flat type polarizer operates in a narrow wavelength region, but can be made large and has high laser resistance, so that it is often used in a strong laser system.
A photo-curing LCD-3D printer using an LCD liquid crystal screen is provided with a liquid storage tank, resin liquid is placed in the liquid storage tank, a lifting tray is arranged above the liquid storage tank, a bottom film is arranged on the bottom surface of the liquid storage tank, the bottom surface of the liquid storage tank is transparent, the liquid crystal screen is arranged below the liquid storage tank, and a light source is arranged below the liquid crystal screen. The principle of 3D printing is that the liquid crystal screen is utilized for light transmission irradiation, so that the bottom film of the liquid crystal screen is solidified according to an image formed by the light transmission of the liquid crystal screen and is solidified on the supporting plate. Due to the existence of the polarizing film in the liquid crystal screen, 50% of light energy irradiated into the liquid crystal screen by the light source is absorbed by the polarizing film, and the light energy utilization rate is low.
Disclosure of Invention
The invention aims to solve the problems that 50% of light energy irradiated by a light source of an existing liquid crystal display 3D printer into a liquid crystal display is absorbed by a polarizing film and the light energy utilization rate is low, and provides a polarizing light source for liquid crystal display 3D printing.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a polarization light source for liquid crystal display 3D prints, its characterized in that, includes the polarization adjustment piece, the incident side of polarization adjustment piece sets up the light source, the exit side sets up the liquid crystal display, the polarization adjustment piece is including alternately distributed's first polarization module and second polarization module, and the slope sets up the polarization membrane in the first polarization module, and the slope is provided with the reflectance coating in the second polarization module, and reflectance coating and polarization membrane are parallel to each other, and the exit side of first polarization module or second polarization module is equipped with the gyroplane. The light is electromagnetic wave, and can be divided into P polarized light and S polarized light according to the relation between the vibration direction and the propagation direction, and the common light source is generally uniform in all directions. Therefore, when the conventional light source passes through the liquid crystal screen, half of the light energy is filtered, so that the energy is wasted. The scheme uses at least one first polarization module and one second polarization module. According to the scheme, before the light source enters the liquid crystal screen, the light source is arranged into unidirectional light which can pass through the polarizing film of the liquid crystal screen through the adjustment of the polarizing adjusting plate, so that the waste of light energy is reduced. In the scheme, a light source is incident from an incident side of a first polarization module in a manner of arranging a light rotating sheet on an emergent side of the second polarization module, polarized by a polarization film and then divided into transmitted P polarized light and reflected S polarized light, the P polarized light is emergent from the emergent side of the first polarization module, the S polarized light is secondarily reflected by the reflection film in the second polarization module and then is rotated by the light rotating sheet on the emergent side of the second polarization module, and the emergent sides of the second polarization module form P polarized light with consistent propagation directions and consistent vibration directions; and the emergent sides of the first polarization module and the second polarization module emit S polarized light in a mode that a light rotating sheet is arranged on the emergent side of the first polarization module. The P polarized light and the S polarized light of the light source can be completely utilized by the liquid crystal screen, so that the energy consumption of the light source is reduced.
Preferably, the inclination angle of the polarizing film of the first polarizing module with respect to the surface of the polarization adjustment plate is 45 degrees.
Preferably, the optical rotation sheet is attached to the surface of the outgoing side of the polarization adjustment sheet, and the optical rotation angle of the optical rotation sheet is 90 degrees.
Preferably, adjacent side walls of the first polarizing module and the second polarizing module are closely abutted.
Preferably, the first polarizing module and the second polarizing module have the same width.
Preferably, the polarization adjusting plate is disposed in parallel with the liquid crystal panel.
Preferably, the light sources are lattice distributed light sources, and a collimation light source is arranged on the incident side of each first polarization module. The incident side of the second polarization module is not provided with a light source.
Preferably, the collimated light source includes a point light source and a collimating lens.
As another preferable scheme, the light source is a surface distributed light source, a beam shrinking lens array for shrinking the width of the light beam is arranged between the light source and the polarization regulating plate, the beam shrinking lens array comprises light beam shrinking modules which are in one-to-one correspondence with the first polarization modules, and each light beam shrinking module comprises a first lens for converging light beams and a second lens for refracting the light beams converged by the first lens into parallel light. After the light of the light source passes through the light beam shrinking module of the beam shrinking mirror array, the ratio of the light beam shrinking front to back is 2:1 or slightly less than 2:1, so that the light beam can completely cover the range of the first polarization module. The first lens is focused on the focus of the second lens, and if the light source is parallel light, the focuses of the first lens and the second lens coincide; if the light source is divergent, the shapes of the first lens and the second lens of each light beam shrinking module need to be respectively arranged, so as to meet the requirements of light beam shrinking.
Preferably, the first lens is a convex lens, and the second lens is a concave lens disposed on a front side of a focal point of the first lens or a convex lens disposed on a rear side of the focal point of the first lens.
Preferably, the light source includes a beam splitter group, the incident light is incident from one end of the beam splitter group, the beam splitters which are the same as the first polarization modules in number and aligned one by one are arranged along the direction of the incident light, the beam splitters are obliquely arranged and parallel to each other, the number of the beam splitters along the direction of the incident light is n, and the reflectances of the beam splitters along the direction of the incident light are 1/n, 1/(n-1) and 1/(n-2) … 1 in sequence. When the incident light passes through the beam splitter, the incident light is divided into reflected light and penetrating light which continues to linearly transmit according to the reflectivity, and the reflected light forms a light source of the first polarization module. The average distribution of the reflected light is ensured by the increasing reflectivity in the direction of the incident light.
Preferably, the polarization adjusting plate and the beam splitter group are arranged in parallel, and the incident light of the beam splitter group is incident from the beam splitter group and is parallel to the polarization adjusting plate.
Preferably, the incident light included angle between the beam splitter and the beam splitter group is 45 degrees.
Preferably, the width of the polarization regulating plate is smaller than the width of the liquid crystal screen, and a beam expander for expanding the width of the light beam is arranged between the polarization regulating plate and the liquid crystal screen. The unit structure of the polarization regulating plate is complex, the cost is high, and the practical beam expander can reduce the size of the polarization regulating plate and reduce the cost.
Before the light source enters the liquid crystal screen, the light source is arranged into unidirectional light which can pass through the polarizing film of the liquid crystal screen through the adjustment of the polarizing adjusting plate, so that the waste of light energy is reduced, and the energy consumption is saved.
Drawings
The invention is further described below with reference to the accompanying drawings.
Fig. 1 is a schematic view of a structure of the present invention.
Fig. 2 is a schematic view of the structure of a polarization adjustment sheet unit of embodiment 1 of the present invention.
Fig. 3 is a schematic view of the structure of a polarization adjustment sheet unit of embodiment 2 of the present invention.
Fig. 4 is a schematic structural view of embodiment 3 of the present invention.
Fig. 5 is a schematic structural view of embodiment 4 of the present invention.
Fig. 6 is a schematic structural view of embodiment 5 of the present invention.
In the figure: 1. the light source comprises a point light source, 2, a collimating lens, 3, a polarization adjusting plate, 4, a first polarization module, 5, a second polarization module, 6, a liquid crystal display, 7, a polarization film, 8, an optical rotation plate, 9, a reflection film, 10, a first lens, 11, a second lens, 12, a light beam shrinking module, 13, a beam expander, 14, a beam splitter group, 15 and a beam splitter.
Detailed Description
The invention will be further illustrated by the following examples in conjunction with the accompanying drawings.
Example 1: a polarized light source for 3D printing of a liquid crystal display, as shown in fig. 1 and 2. The device comprises a polarization regulating plate 3, wherein a light source is arranged on the incident side of the polarization regulating plate, and a liquid crystal screen 6 parallel to the polarization regulating plate is arranged on the emergent side of the polarization regulating plate. As shown in fig. 2, the polarization adjusting plate comprises a first polarization module 4 and a second polarization module 5 which are alternately distributed and closely attached to each other, and the widths of the first polarization module 4 and the second polarization module 5 are consistent. A polarizing film 6 is obliquely arranged in the first polarizing module 4, a reflecting film 9 is obliquely arranged in the second polarizing module 5, the reflecting film and the polarizing film are parallel to each other, and a light rotating sheet 8 is arranged on the emergent side of the first polarizing module. The polarizing film 7 of the first polarizing module 4 was inclined at an angle of 45 degrees with respect to the surface of the polarization adjustment plate 3. The optical rotation sheet 8 is attached to the surface of the emergent side of the polarization adjusting sheet, and the optical rotation angle of the optical rotation sheet is 90 degrees.
The light source is a lattice distributed light source, and a collimation light source is arranged on the incidence side of each first polarization module and comprises a point light source 1 and a collimation lens 2. The incident side of the second polarization module is not provided with a light source.
As shown in fig. 2, the point light source and the collimating lens light source form parallel light vertically incident from the incident side of the first polarization module, and after polarized by the polarizing film, the parallel light is separated into transmitted P-polarized light and reflected S-polarized light, and the P-polarized light is converted into S-polarized light to be emitted after being optically rotated by 90 ° through the optical rotating sheet at the emergent side of the first polarization module; after the S polarized light polarized by the polarizing film is secondarily reflected by the reflecting film in the second polarizing module, the S polarized light is emitted at the emitting side of the second polarizing module, the emitting sides of the first polarizing module and the second polarizing module form S polarized light with consistent propagation directions and consistent vibration directions, and the S polarized light can be completely utilized by the liquid crystal display, so that the energy consumption of a light source is reduced.
Example 2: a polarized light source for 3D printing of a liquid crystal display, as shown in fig. 1 and 3. The device comprises a polarization regulating plate 3, wherein a light source is arranged on the incident side of the polarization regulating plate, and a liquid crystal screen 6 parallel to the polarization regulating plate is arranged on the emergent side of the polarization regulating plate. As shown in fig. 3, the polarization adjusting plate comprises a first polarization module 4 and a second polarization module 5 which are alternately distributed and closely attached to each other, and the widths of the first polarization module 4 and the second polarization module 5 are consistent. A polarizing film 6 is obliquely arranged in the first polarizing module 4, a reflecting film 9 is obliquely arranged in the second polarizing module 5, the reflecting film and the polarizing film are parallel to each other, and a light rotating sheet 8 is arranged on the emergent side of the second polarizing module. The polarizing film 7 of the first polarizing module 4 was inclined at an angle of 45 degrees with respect to the surface of the polarization adjustment plate 3. The optical rotation sheet 8 is attached to the surface of the emergent side of the polarization adjusting sheet, and the optical rotation angle of the optical rotation sheet is 90 degrees.
The light source is a lattice distributed light source, and a collimation light source is arranged on the incidence side of each first polarization module and comprises a point light source 1 and a collimation lens 2. The incident side of the second polarization module is not provided with a light source.
As shown in fig. 2, the point light source and the collimating lens light source form parallel light vertically incident from the incident side of the first polarization module, after polarized by the polarizing film, the parallel light is separated into transmitted P-polarized light and reflected S-polarized light, the P-polarized light exits from the exit side of the first polarization module, the S-polarized light is secondarily reflected by the reflecting film in the second polarization module, and then rotates on the exit side of the second polarization module through the optical rotation sheet, and exits from the exit side of the second polarization module, the P-polarized light with consistent propagation directions and consistent vibration directions is formed on the exit sides of the first polarization module and the second polarization module, and can be completely utilized by the liquid crystal screen, thereby reducing the energy consumption of the light source.
Example 3: a polarized light source for 3D printing of a liquid crystal display, as shown in fig. 4. The light source of the device is a plane distribution light source, a beam shrinking lens array which reduces the width of a light beam is arranged between the light source and a polarization adjusting plate, the beam shrinking lens array comprises light beam shrinking modules 12 which are in one-to-one correspondence with the first polarization modules, and each light beam shrinking module comprises a first lens 10 used for converging light beams and a second lens 11 used for refracting the light beams converged by the first lens into parallel light. The first lens is a convex lens, and the second lens is a concave lens arranged on the front side of the focal point of the first lens. Other structures of the present apparatus are the same as those of embodiment 1 or 2.
Example 4: a polarized light source for 3D printing of a liquid crystal display is shown in fig. 5. The light source of the device is a plane distribution light source, a beam shrinking lens array which reduces the width of a light beam is arranged between the light source and a polarization adjusting plate, the beam shrinking lens array comprises light beam shrinking modules 12 which are in one-to-one correspondence with the first polarization modules, and each light beam shrinking module comprises a first lens 10 used for converging light beams and a second lens 11 used for refracting the light beams converged by the first lens into parallel light. The first lens is a convex lens, and the second lens is a convex lens arranged at the rear side of the focal point of the first lens. Other structures of the present apparatus are the same as those of embodiment 1 or 2.
Example 5: a polarized light source for 3D printing of a liquid crystal display, as shown in fig. 6. The device comprises a polarization regulating plate 3, wherein a light source is arranged on the incident side of the polarization regulating plate, and a liquid crystal screen 6 parallel to the polarization regulating plate is arranged on the emergent side of the polarization regulating plate. The polarization adjusting plate comprises a first polarization module 4 and a second polarization module 5 which are alternately distributed and closely abutted to each other, and the widths of the first polarization module 4 and the second polarization module 5 are consistent. A polarizing film 6 is obliquely arranged in the first polarizing module 4, a reflecting film 9 is obliquely arranged in the second polarizing module 5, the reflecting film and the polarizing film are parallel to each other, and a light rotating sheet 8 is arranged on the emergent side of the first polarizing module. The polarizing film 7 of the first polarizing module 4 was inclined at an angle of 45 degrees with respect to the surface of the polarization adjustment plate 3. The optical rotation sheet 8 is attached to the surface of the emergent side of the polarization adjusting sheet, and the optical rotation angle of the optical rotation sheet is 90 degrees.
The width of the polarization regulating plate 3 is smaller than that of the liquid crystal screen 6, and a beam expander 13 for expanding the beam width is arranged between the polarization regulating plate and the liquid crystal screen.
The light source comprises a beam splitter group 14 parallel to the polarization adjusting plate, one end of the beam splitter group is provided with incident light parallel to the polarization adjusting plate, beam splitters 15 which are the same as the first polarization modules in number and aligned one by one are arranged along the direction of the incident light, the beam splitters are obliquely arranged and parallel to the polarization films of the first polarization modules, the number of the beam splitters along the direction of the incident light is n, and the reflectivities of the beam splitters along the direction of the incident light are sequentially 1/n, 1/(n-1) and 1/(n-2) … 1.
Claims (9)
1. The polarized light source for the 3D printing of the liquid crystal screen is characterized by comprising a polarization adjusting plate, wherein a light source is arranged on the incident side of the polarization adjusting plate, the liquid crystal screen is arranged on the emergent side of the polarization adjusting plate, the polarization adjusting plate comprises a first polarization module and a second polarization module which are alternately distributed, the first polarization module is internally provided with a polarization film in an inclined manner, the second polarization module is internally provided with a reflection film in an inclined manner, the reflection film and the polarization film are parallel to each other, and the emergent side of the first polarization module or the second polarization module is provided with a spinning piece;
the light source comprises a beam splitting lens group, incident light enters from one end of the beam splitting lens group, beam splitting lenses which are the same as the first polarization modules in number and aligned one by one are arranged along the direction of the incident light, the beam splitting lenses are obliquely arranged and parallel to each other, the number of the beam splitting lenses along the direction of the incident light is n, and the reflectivities of the beam splitting lenses along the direction of the incident light are 1/n, 1/(n-1) and 1/(n-2) … 1 in sequence; the beam splitter is parallel to the polarizing film of the first polarizing module.
2. The polarized light source for 3D printing of a liquid crystal display according to claim 1, wherein: the inclination angle of the polarizing film of the first polarizing module relative to the surface of the polarization regulating plate is 45 degrees.
3. The polarized light source for 3D printing of a liquid crystal display according to claim 1, wherein: the optical rotation sheet is attached to the surface of the emergent side of the polarization adjusting sheet, and the optical rotation angle of the optical rotation sheet is 90 degrees.
4. A polarized light source for 3D printing of a liquid crystal display according to claim 1, 2 or 3, wherein: the adjacent side walls of the first polarization module and the second polarization module are closely abutted.
5. A polarized light source for 3D printing of a liquid crystal display according to claim 1, 2 or 3, wherein: the widths of the first polarization module and the second polarization module are consistent.
6. A polarized light source for 3D printing of a liquid crystal display according to claim 1, 2 or 3, wherein: the polarization regulating plate is arranged in parallel with the liquid crystal screen.
7. The polarized light source for 3D printing of a liquid crystal display according to claim 1, wherein: the polarization adjusting plate and the beam splitting lens group are arranged in parallel, and incident light of the beam splitting lens group is incident from the beam splitting lens group and is parallel to the polarization adjusting plate.
8. The polarized light source for 3D printing of a liquid crystal display according to claim 1 or 7, wherein: the incident light included angle between the beam splitter and the beam splitter group is 45 degrees.
9. A polarized light source for 3D printing of a liquid crystal display according to claim 1, 2 or 3, wherein: the width of the polarization regulating plate is smaller than that of the liquid crystal screen, and a beam expander for expanding the width of the light beam is arranged between the polarization regulating plate and the liquid crystal screen.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811570977.1A CN109483886B (en) | 2018-12-21 | 2018-12-21 | Polarized light source for liquid crystal display 3D printing |
| PCT/CN2019/125532 WO2020125569A1 (en) | 2018-12-21 | 2019-12-16 | Polarized light source for 3d printing of liquid crystal screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811570977.1A CN109483886B (en) | 2018-12-21 | 2018-12-21 | Polarized light source for liquid crystal display 3D printing |
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| Publication Number | Publication Date |
|---|---|
| CN109483886A CN109483886A (en) | 2019-03-19 |
| CN109483886B true CN109483886B (en) | 2024-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811570977.1A Active CN109483886B (en) | 2018-12-21 | 2018-12-21 | Polarized light source for liquid crystal display 3D printing |
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| Country | Link |
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| CN (1) | CN109483886B (en) |
| WO (1) | WO2020125569A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109483886B (en) * | 2018-12-21 | 2024-01-30 | 深圳市龙祥卓越电子科技有限公司 | Polarized light source for liquid crystal display 3D printing |
| CN111914974B (en) * | 2020-07-07 | 2022-02-18 | 山东大学 | Three-dimensional two-dimensional code generation method and system for 3D printing |
| CN113791506A (en) * | 2021-09-18 | 2021-12-14 | 京东方科技集团股份有限公司 | Light source system and 3D printer |
| CN114506079B (en) * | 2022-02-25 | 2024-05-24 | 深圳市纵维立方科技有限公司 | Light source assembly and 3D printer |
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| CN109483886A (en) | 2019-03-19 |
| WO2020125569A1 (en) | 2020-06-25 |
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