阅读说明：本技术 一种3d打印用液晶掩膜版及其打印系统 (Liquid crystal mask plate for 3D printing and printing system thereof ) 是由 丁兴立 于 2020-08-06 设计创作，主要内容包括：本发明公开了一种3D打印用液晶掩膜版,包括液晶面板,所述液晶面板由第一液晶盒和第二液晶盒组成,所述第一液晶盒和第二液晶盒相互平行叠放在一起。一种3D打印系统,包括光源、液体树脂槽和位于光源与液体树脂槽之间的液晶掩膜版,所述光源为平行光源,竖直照射在液晶面板上,所述液体树脂槽内盛放有待打印的液体树脂,位于液晶掩膜版与光源相背一侧。本发明液晶面板采用相互平行且重叠设置的第一液晶盒和第二液晶盒,利用两种液晶盒共同作用,可以减小光透过率,实现黑态的产生并降低黑态的透过率,可以提高液晶器件的对比度与3D打印系统的打印精度。(The invention discloses a liquid crystal mask for 3D printing, which comprises a liquid crystal panel, wherein the liquid crystal panel consists of a first liquid crystal box and a second liquid crystal box, and the first liquid crystal box and the second liquid crystal box are mutually stacked in parallel. The utility model provides a 3D printing system, includes light source, liquid resin groove and is located the liquid crystal mask between light source and the liquid resin groove, the light source is parallel light source, vertical irradiation on liquid crystal display panel, the liquid resin that waits to print is held in the liquid resin groove, is located liquid crystal mask and the light source one side of carrying on the back mutually. The liquid crystal panel adopts the first liquid crystal box and the second liquid crystal box which are parallel to each other and are arranged in an overlapped mode, and the light transmittance can be reduced under the combined action of the two liquid crystal boxes, so that the generation of a black state is realized, the transmittance of the black state is reduced, and the contrast of a liquid crystal device and the printing precision of a 3D printing system can be improved.)

1. The utility model provides a 3D prints and uses liquid crystal mask version which characterized in that: the liquid crystal display panel comprises a liquid crystal panel, wherein the liquid crystal panel is composed of a first liquid crystal box (3) and a second liquid crystal box (4), and the first liquid crystal box (3) and the second liquid crystal box (4) are stacked in parallel.

2. The liquid crystal mask for 3D printing according to claim 1, wherein: the first liquid crystal box (3) and the second liquid crystal box (4) are in a TN display mode.

3. The liquid crystal mask for 3D printing according to claim 1 or 2, wherein: the first liquid crystal box (3) comprises a first liquid crystal layer (31), a first upper substrate (32) and a first lower substrate (33), wherein the first upper substrate (32) and the first lower substrate (33) are positioned on two sides of the first liquid crystal layer (31), and a first polarizer (34) is arranged on one side, opposite to the first liquid crystal layer (31), of the first upper substrate (32);

the second liquid crystal cell (4) comprises a second liquid crystal layer (41), and a second upper substrate (42) and a second lower substrate (43) which are positioned on two sides of the second liquid crystal layer (41), wherein a second polaroid (44) is arranged on one side, opposite to the second liquid crystal layer (41), of the second lower substrate (43);

and a third polaroid (5) is arranged between the first liquid crystal box (3) and the second liquid crystal box (4).

4. The liquid crystal mask for 3D printing according to claim 3, wherein: the vibration directions of the polarized light allowed to pass through by the first polarizer (34) and the third polarizer (5) are perpendicular to each other, and the vibration directions of the polarized light allowed to pass through by the second polarizer (44) and the third polarizer (5) are perpendicular to each other.

5. The liquid crystal mask for 3D printing according to claim 3, wherein: the side that first upper substrate (32) and first lower substrate (33) contacted with first liquid crystal layer (31) all is equipped with the PI friction, the PI friction direction of first upper substrate (32) side is unanimous with first polaroid (34) polarisation direction, the PI friction direction of first lower substrate (33) side is unanimous with third polaroid (5) polarisation direction, first upper substrate (32) and first lower substrate (33) PI friction angle are 90.

6. The liquid crystal mask for 3D printing according to claim 3, wherein: the side that second upper substrate (42) and second infrabasal plate (43) contacted with second liquid crystal layer (41) all is equipped with PI friction, the PI friction direction and the third polaroid (5) polarisation direction of second upper substrate (42) side are unanimous, the PI friction direction and the second polaroid (44) polarisation direction of second infrabasal plate (43) side are unanimous, second upper substrate (42) and second infrabasal plate (43) PI friction angle are 90.

7. The liquid crystal mask for 3D printing according to claim 3, wherein: the first liquid crystal box (3) and the second liquid crystal box (4) are respectively provided with a driver, the driver comprises a common electrode and a TFT switch, the common electrode and the TFT switch of the first liquid crystal box (3) are respectively arranged on the first upper substrate (32) and the first lower substrate (33), and the common electrode and the TFT switch of the second liquid crystal box (4) are respectively arranged on the second upper substrate (42) and the second lower substrate (43).

8. The liquid crystal mask for 3D printing and the printing system thereof according to claim 3, wherein: the first upper substrate (32), the first lower substrate (33), the second upper substrate (42) and the second lower substrate (43) are transparent substrates, and pixels of the first upper substrate (32), the first lower substrate (33), the second upper substrate (42) and the second lower substrate (43) are isolated by adopting BM.

9. The liquid crystal mask for 3D printing and the printing system thereof according to claim 1, wherein: the distance between the first liquid crystal box (3) and the second liquid crystal box (4) is controlled by a spacer or a PhotoSpacer.

10. A 3D printing system, characterized by: the liquid crystal display device comprises a light source (1), a liquid resin groove (2) and a liquid crystal mask plate located between the light source (1) and the liquid resin groove (2), wherein the light source (1) is a parallel light source and vertically irradiates on the liquid crystal mask plate, liquid resin to be printed is contained in the liquid resin groove (2), and the liquid resin is located on one side of a liquid crystal panel, which is opposite to the light source (1).

Technical Field

The invention belongs to the technical field of 3D printing, and particularly relates to a liquid crystal mask for 3D printing and a printing system thereof.

Background

The 3D printing technology is characterized in that a computer three-dimensional design model is used as a blueprint, special materials such as metal powder, ceramic powder, plastics, cell tissues and the like are stacked layer by layer and bonded through a software layering dispersion and numerical control forming system in a laser beam, hot melting nozzles and the like, and finally, solid products are manufactured through superposition forming. Different from the traditional manufacturing industry in which the raw materials are shaped, cut and finally produced into finished products through machining modes such as dies, turning and milling, the 3D printing method changes the three-dimensional entity into a plurality of two-dimensional planes, and the three-dimensional entity is produced through material treatment and layer-by-layer superposition, so that the manufacturing complexity is greatly reduced. The digital manufacturing mode can generate parts in any shape directly from computer graphic data without complex process, huge machine tool and much manpower, so that the production and manufacturing can be extended to a wider production crowd range, and the 3D printing is widely applied to various fields such as medical treatment, education, consumer goods, industry and the like.

The basic principle of 3D printing is layered processing and superposition molding, i.e. a 3D entity is generated by adding materials layer by layer, when 3D printing is performed, a three-dimensional model of an object to be printed is obtained by a computer through modes of design, scanning, etc., a series of digital slices are completed along a certain direction by a computer aided design technology (e.g. CAD), information of the slices is transmitted to a 3D printer, a machine instruction is generated by the computer according to the slices, a thin layer is printed by the 3D printer according to the machine instruction, and the continuous thin layers are stacked until a solid object is molded to form a three-dimensional solid object, thereby completing 3D printing.

The existing 3D printing method starts to use the traditional liquid crystal display panel as a light shield for light curing, but the traditional single liquid crystal box has low black transmittance and simultaneously has the problem of visual angle, so that the 3D model is not cured accurately, and therefore, the printing precision is improved by adopting two overlapped liquid crystal boxes.

Disclosure of Invention

The invention aims to provide a liquid crystal mask for 3D printing and a printing system thereof, and the liquid crystal mask for 3D printing and the printing system thereof can improve the contrast of a liquid crystal device and the printing precision of the 3D printing system.

In order to achieve the purpose, the invention adopts the technical scheme that: the liquid crystal mask for 3D printing comprises a liquid crystal panel, wherein the liquid crystal panel is composed of a first liquid crystal box and a second liquid crystal box, and the first liquid crystal box and the second liquid crystal box are mutually stacked in parallel.

The technical scheme of further improvement in the technical scheme is as follows:

1. in the above scheme, the first liquid crystal cell and the second liquid crystal cell are both in a TN display mode.

2. In the above scheme, the first liquid crystal cell includes a first liquid crystal layer, and a first upper substrate and a first lower substrate located at two sides of the first liquid crystal layer, and a first polarizer is disposed on a side of the first upper substrate opposite to the first liquid crystal layer;

the second liquid crystal box comprises a second liquid crystal layer, and a second upper substrate and a second lower substrate which are positioned on two sides of the second liquid crystal layer, wherein a second polaroid is arranged on one side of the second lower substrate, which is opposite to the second liquid crystal layer;

and a third polaroid is arranged between the first liquid crystal box and the second liquid crystal box.

3. In the above-described aspect, the vibration directions of the polarized light allowed to pass by the first polarizer and the third polarizer are perpendicular to each other, and the vibration directions of the polarized light allowed to pass by the second polarizer and the third polarizer are perpendicular to each other.

4. In the above solution, PI friction is disposed on the side surfaces of the first upper substrate and the first lower substrate, which are in contact with the first liquid crystal layer, the PI friction direction of the side surface of the first upper substrate is consistent with the polarization direction of the first polarizer, the PI friction direction of the side surface of the first lower substrate is consistent with the polarization direction of the third polarizer, and the PI friction angle between the first upper substrate and the first lower substrate is 90 °.

5. In the above scheme, the side of the second upper substrate and the side of the second lower substrate contacting the second liquid crystal layer are both provided with PI friction, the PI friction direction of the side of the second upper substrate is consistent with the polarization direction of the third polarizer, the PI friction direction of the side of the second lower substrate is consistent with the polarization direction of the second polarizer, and the PI friction angle of the second upper substrate and the second lower substrate is 90 °.

6. In the above scheme, the first liquid crystal cell and the second liquid crystal cell are respectively provided with a driver for controlling the deflection of liquid crystal molecules, the driver includes a common electrode and a TFT switch, the common electrode and the TFT switch of the first liquid crystal cell are respectively disposed on the first upper substrate and the first lower substrate, and the common electrode and the TFT switch of the second liquid crystal cell are respectively disposed on the second upper substrate and the second lower substrate.

7. In the above scheme, the first upper substrate, the first lower substrate, the second upper substrate and the second lower substrate are all transparent substrates, and the pixels of the first upper substrate, the first lower substrate, the second upper substrate and the second lower substrate are isolated by BM.

8. In the above scheme, the space control of the first liquid crystal cell and the second liquid crystal cell is controlled by a spacer or a PhotoSpacer.

The invention adopts another technical scheme that: the utility model provides a 3D printing system, includes light source, liquid resin groove and is located the liquid crystal mask between light source and the liquid resin groove, the light source is parallel light source, vertical irradiation on the liquid crystal mask, the liquid resin that waits to print is held in the liquid resin groove, is located liquid crystal display panel and the light source one side of carrying on the back mutually.

Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:

according to the liquid crystal mask for 3D printing and the printing system thereof, the liquid crystal panel adopts the first liquid crystal box and the second liquid crystal box which are parallel to each other and are overlapped, and the light transmittance can be reduced by utilizing the combined action of the two liquid crystal boxes, so that the generation of a black state is realized, the transmittance of the black state is reduced, and the contrast of a liquid crystal device and the printing precision of the 3D printing system can be improved.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

In the figure: 1. a light source; 2. a liquid resin tank; 3. a first liquid crystal cell; 31. a first liquid crystal layer; 32. a first upper substrate; 33. a first lower substrate; 34. a first polarizer; 4. a second liquid crystal cell; 41. a second liquid crystal layer; 42. a second upper substrate; 43. a second lower substrate; 44. a second polarizer; 5. and a third polarizer.

Detailed Description

In the description of this patent, it is noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but 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 thus should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The meaning of the above terms in this patent may be specifically understood by those of ordinary skill in the art.

The invention is further described below with reference to the following examples: