CN109334008B - 3D printing device - Google Patents

3D printing device Download PDF

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Publication number
CN109334008B
CN109334008B CN201811134357.3A CN201811134357A CN109334008B CN 109334008 B CN109334008 B CN 109334008B CN 201811134357 A CN201811134357 A CN 201811134357A CN 109334008 B CN109334008 B CN 109334008B
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printing
display panel
energy
pixel unit
corresponding relationship
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CN109334008A (en
Inventor
韩甲伟
王臣
张祖莹
陈杰
曾强
吴婷婷
马玉洁
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Tianma Microelectronics Co Ltd
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Tianma Microelectronics Co Ltd
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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
    • 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
    • B29C64/10—Processes of additive manufacturing
    • B29C64/106—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
    • 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

Abstract

The embodiment of the invention provides a 3D printing device. The 3D printing device comprises a 3D printing display panel, wherein the 3D printing display panel comprises a plurality of pixel units, and the energy of light rays emitted by each pixel unit has a first corresponding relation with an input gray scale; the light emitted by the pixel unit is used for irradiating a 3D printing material to cure the 3D printing material; the curing rate of the 3D printing material and the energy of light irradiating the 3D printing material have a second corresponding relationship, and the first corresponding relationship and the second corresponding relationship are the same corresponding relationship or the first corresponding relationship and the second corresponding relationship are inversely related. According to the scheme of the embodiment of the invention, the curing rate adjusting precision of the 3D printing material is improved, so that the 3D printing precision is improved.

Description

3D printing device
Technical Field
The invention relates to the technical field of display, in particular to a 3D printing device.
Background
3D printing is the construction of objects by layer-by-layer printing using bondable materials such as powdered metals or plastics based on digital model files. The existing 3D printing technology mainly comprises a hot-melting plastic basic technology, a laser sintering molding technology, a photocuring molding 3D printing technology and the like. The photocuring molding 3D printing technology utilizes the display panel imaging principle, and under the drive of a microcomputer and a display panel drive circuit, an image signal is provided by a computer program. At 3D printing process, print display panel through 3D and show that treat printing the image, the light that the region that shows that the demonstration is treated printing the image shines the liquid resin that holds in the storage tank to the liquid resin that makes the quilt shine becomes solid-state, forms a thin layer that needs the printing model, and this printing process of repetitious repetition can realize the simplistic production of arbitrary complex construction part.
The common 3D printing display panel carries out Gamma correction according to the sensitivity degree of human eyes to gray scale change, namely, the human eyes sense the sensitivity to low gray scale change and sense the insensitivity to high gray scale change, and the energy of the human eyes sensing panel can linearly change along with the gray scale through the Gamma correction, so that the gray scale distinguishing capability is improved. The Gamma corrected V-T curve of the existing display panel is a nonlinear response, and the correction formula is as follows:
Li=L255×(i/255)γ
wherein L isiThe energy of the ith gray scale, i is the gray scale number, and gamma is generally 2.2 + -0.3.
However, since the Gamma correction is performed on the conventional 3D printing display panel according to the sensitivity of human eyes to the gray scale change, the 3D printing display panel has a small change in light emission energy when the input gray scale changes in the low gray scale region, and has a large change in light emission energy when the input gray scale changes in the high gray scale region. When the light-emitting energy of the 3D printing display panel is required to be adjusted by adjusting the gray scale, the adjustment accuracy of the resin curing rate is different when the high gray scale and the low gray scale occur, and then the adjustment accuracy of the curing rate is influenced, so that the edge area of a printed product is not smooth and flaws such as printing sawteeth are easy to occur, and the 3D printing accuracy is influenced.
Disclosure of Invention
The embodiment of the invention provides a 3D printing device, which aims to improve the curing rate adjusting precision and further improve the 3D printing precision.
An embodiment of the present invention provides a 3D printing apparatus, including:
the 3D printing display panel comprises a plurality of pixel units, and the energy of light rays emitted by each pixel unit has a first corresponding relation with an input gray scale;
the light emitted by the pixel unit is used for irradiating a 3D printing material to cure the 3D printing material; the curing rate of the 3D printing material and the energy of light irradiating the 3D printing material have a second corresponding relationship, and the first corresponding relationship and the second corresponding relationship are the same corresponding relationship or the first corresponding relationship and the second corresponding relationship are inversely related.
According to the 3D printing device provided by the embodiment of the invention, the 3D printing display panel is adopted to irradiate the 3D printing material to be solidified. The light energy emitted by each pixel unit of the 3D printing display panel has a first corresponding relation with the input gray scale, the curing rate of the 3D printing material and the energy of the light irradiating the 3D printing material have a second corresponding relation, and the curing rate of the 3D printing material is linearly corresponding to the input gray scale of each pixel unit of the 3D printing display panel by setting the first corresponding relation and the second corresponding relation to be the same corresponding relation or inversely related to the first corresponding relation and the second corresponding relation, so that when the curing rate of the 3D printing material is adjusted by adjusting the input gray scale, the adjusting precision is higher, and the 3D printing precision is improved.
Drawings
Fig. 1 is a schematic structural diagram of a 3D printing apparatus according to an embodiment of the present invention;
FIG. 2 is a graph of the curing rate of a 3D printing material versus the energy of the irradiated light according to an embodiment of the present invention;
FIG. 3 is a graph showing the relationship between the input gray scale and the emitted light energy of a 3D printed display panel according to an embodiment of the present invention;
FIG. 4 is a graph showing another relationship between the input gray scale and the emitted light energy of a 3D printed display panel according to an embodiment of the present invention;
FIG. 5 is a diagram illustrating another relationship between input gray levels and emitted light energy of a 3D printed display panel according to an embodiment of the present invention;
FIG. 6 is a graph showing another relationship between the input gray scale and the emitted light energy of a 3D printed display panel according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of another 3D printing apparatus according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a 3D printing apparatus provided with a gamma adjusting unit according to an embodiment of the present invention;
FIG. 9 is a schematic structural diagram of another 3D printing apparatus provided with a gamma adjusting unit according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a 3D printing display panel according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a schematic structural diagram of a 3D printing apparatus according to an embodiment of the present invention. As shown in fig. 1, the 3D printing apparatus 100 includes a 3D printing display panel 10, the 3D printing display panel 10 including a plurality of pixel units 110; the light emitted from the pixel unit 110 is used to irradiate the 3D printing material 20, so that the 3D printing material 20 is cured. The energy T of the light emitted by each pixel unit 110 has a first corresponding relationship with the input gray level L; the curing rate S of the 3D printing material 20 and the energy T' of the light irradiating the 3D printing material 20 have a second corresponding relationship, and the first corresponding relationship and the second corresponding relationship are the same corresponding relationship or the first corresponding relationship and the second corresponding relationship are inversely related.
Specifically, the 3D printing material 20 is irradiated by the light emitted by the 3D printing display panel 10, so that the 3D printing material 20 is solidified into a corresponding object, and the energy T of the light emitted by the 3D printing display panel 10 is the energy T' of the light irradiating the 3D printing material 20. The light energy T can be adjusted by adjusting the input gray scale L of the 3D printing display panel 10, so as to adjust the energy T' of the light irradiated onto the 3D printing material 20, and further adjust the curing rate S of the 3D printing material 20.
When the second correspondence is a linear correspondence or a piecewise linear correspondence, the first correspondence may be the same as the second correspondence, so that the curing rate S of the 3D printing material 20 linearly corresponds to the input gray level L; when the second corresponding relationship is a curvilinear corresponding relationship, the first corresponding relationship is inversely related to the second corresponding relationship, that is, after the first corresponding relationship is substituted into the second corresponding relationship,so that the curing rate S of the 3D printing material 20 linearly corresponds to the input gray level L. For example, when the curing rate S and the light energy T 'satisfy the formula S ═ nT'2In + m, the energy T of the light emitted from the pixel unit 110 and the input gray level L satisfy the formula T √ L, where T' ═ T, m, and n are constants, S ═ nL + m can be obtained, and the curing rate of the 3D material corresponds to the input gray level L linearly.
In the embodiment, the first corresponding relationship and the second corresponding relationship are the same corresponding relationship or the first corresponding relationship and the second corresponding relationship are inversely related, so that the curing rate S of the 3D printing material 20 linearly corresponds to the input gray scale L of each pixel unit 110 of the 3D printing display panel 10, and when the curing rate S of the 3D printing material 20 is adjusted by adjusting the input gray scale L, the adjustment accuracy is higher, and the 3D printing accuracy is improved.
It should be noted that the specific type of the second corresponding relationship may be determined according to the specific type of the 3D printing material 20, and this embodiment is not specifically limited, and the specific type of the first corresponding relationship may be determined according to the type of the second corresponding relationship, and this embodiment is also not specifically limited, and it is only required to ensure that the curing rate S of the 3D printing material 20 linearly corresponds to the input gray level L after the first corresponding relationship is substituted into the second corresponding relationship.
With reference to fig. 1, optionally, when the curing rate S of the 3D printing material 20 and the energy T' of the light irradiating the 3D printing material 20 are in a linear relationship, the input gray level L of each pixel unit 110 of the 3D printing display panel 10 and the energy T of the light emitted by the pixel unit 110 are also in a linear relationship.
Specifically, when the curing rate S of the 3D printing material 20 and the energy T' of the light irradiating the 3D printing material 20 are in a linear relationship, since the existing 3D printing display panel performs Gamma correction according to the sensitivity of human eyes to gray scale changes, the 3D printing display panel has a small change in light emitting energy when the input gray scale changes in a low gray scale region, and has a large change in light emitting energy when the input gray scale changes in a high gray scale region. When a low gray scale area of the 3D display panel is adjusted, when a single gray scale changes, the difference on the resin sensitization is small or no difference, and the change of the resin curing rate can be realized only by changing a plurality of gray scales; in the high gray scale area, when a single gray scale changes, the curing rate of the resin has a large difference, so that the adjustment precision of the curing rate is influenced, and the utilization rate of the gray scale in the low gray scale area is low. By setting the input gray scale L of each pixel unit 110 of the 3D printing display panel 10 and the energy T of the light emitted by the pixel unit 110 to be in a linear relationship, the curing rate S corresponds to the input gray scale L linearly, so that the curing rate S can be adjusted more accurately in the 3D printing process, the gray scale utilization rate of the low gray scale region and the high gray scale region is improved, and the printing quality controllability is increased.
Fig. 2 is a graph showing a relationship between a curing rate of a 3D printing material and energy of an irradiated light according to an embodiment of the present invention. Optionally, with reference to fig. 1 and fig. 2, the curing rate S of the 3D printing material 20 and the energy T 'of the light irradiating the 3D printing material 20 have a linear correspondence C2, that is, the linear correspondence C2 between the curing rate S and the energy T' of the light satisfies the following formula:
S＝K1′×T′；
where K1 'is the slope of a straight line corresponding to the linear relationship C2 between the curing rate S of the 3D printing material 20 and the energy T' of the light irradiated to the 3D printing material 20.
Fig. 3 is a relationship diagram of input gray scales and emitted light energy of a 3D printing display panel according to an embodiment of the present invention, and with reference to fig. 1 and fig. 3, the energy T of light emitted by each pixel unit 110 in the 3D printing display panel 10 in the 3D printing apparatus 100 has a linear correspondence C1 with the input gray scale L of the pixel unit 110. Accordingly, the linear relationship C1 between the energy T of the light emitted from each pixel unit 110 and the input gray level L satisfies the following formula:
T＝L×K1；
l is more than or equal to 0 and less than or equal to L0, K1 is more than 0, L0 is the maximum input gray scale of the pixel unit, L and L0 are positive integers, and K1 is the slope of the straight line corresponding to the linear relation C1 between the energy T of the light emitted by each pixel unit 110 and the input gray scale L. Taking the 3D printing display panel 10 with 8 bits as an example, the 3D printing display panel 10 can represent 2 power of 8 (256) energy levels, that is, the 3D printing display panel 10 has 256 gray levels, and each pixel unit 110 of the 3D printing display panel 10 can display 256 energy levels, at this time, the maximum input gray level L0 of the pixel unit 110 is 255.
When the energy T of the light emitted by each pixel unit 110 of the 3D printing display panel 10 is equal to the energy T' of the light irradiating the 3D printing material 20, it can be obtained that:
S＝K1′×K1×L；
that is, the input gray scale L of the 3D printing display panel 10 linearly corresponds to the curing rate S of the 3D printing material 20. Therefore, in the 3D printing process, more accurate solidification rate adjustment can be realized, the gray scale utilization rate of a low gray scale region and a high gray scale region is improved, and the printing quality controllability is improved.
In addition, when the unit input gray scale changes, the variable quantity of the curing rate S can be adjusted by adjusting the specific numerical value of K1, so that the adjusting precision of the curing rate S is adjusted, the curing rate S can be adjusted more accurately in the 3D printing process, and the printing quality controllability is increased.
In the present embodiment, the energies T' and T in each drawing are normalized energies, the maximum value thereof is represented by 1, and the slope and constant in each formula are normalized slopes and constants.
Optionally, a linear relationship corresponding to segments may also be provided between the curing rate S of the 3D printing material 20 and the light energy T' irradiating the 3D printing material 20, and correspondingly, the energy T of the light emitted by each pixel unit 110 of the 3D printing display panel 10 corresponds to the input gray scale L in a piecewise linear manner, so that the curing rate S can be adjusted more accurately during the 3D printing process, and the printing quality controllability is further increased.
Optionally, when the 3D printed material is at the energy T' of the lower irradiated light, the 3D printed material cannot be cured; when the energy T1 'of the irradiated light is greater than T1', the curing rate S of the 3D printing material changes linearly as follows:
S＝0(0＜T′＜T1′)；
S＝K2′×T′(T1′≤T′≤1)；
wherein, (0, T1') is a region where the energy of the light is low; k2 'is the rate of change of the curing rate S of the 3D printed material when the energy T' of the light is high. That is, when the energy T of the light emitted by the 3D printing display panel is low, the curing rate of the 3D printing material is 0, and when the energy T of the light emitted by the 3D printing display panel is high, the curing rate of the 3D printing material linearly changes with the energy.
Fig. 4 is another relationship diagram of input gray scale and emitted light energy of a 3D printed display panel according to an embodiment of the invention. Accordingly, in conjunction with fig. 1 and 4, the relationship between the energy T of the emitted light of each pixel unit 110 of the 3D printed display panel 10 and the input gray level L of the 3D printed display panel 10 satisfies:
T＝0(L＝0)；
T＝K2×L+T1(1≤L≤L0)；
where K2>0, K2+ T1 ═ T2, T2>0, T2 is the minimum energy corresponding to curing of the 3D printing material 20, L0 is the maximum input gray level of the pixel unit 110, and L0 are both positive integers.
Since the energy T of the light emitted by each pixel unit 110 of the 3D printing display panel 10 is equal to the energy T' of the light irradiating the 3D printing material 20, the input gray level L of each pixel unit 110 of the 3D printing display panel 10 and the curing rate S of the 3D printing material 20 satisfy:
S＝0(L＝0)；
S＝K2′*K2×L+S′(1≤L≤L0)；
it can be known that the input gray scale L of each pixel unit 110 of the 3D printing display panel 10 and the curing rate S of the 3D printing material 20 are in a piecewise linear relationship, so that when the curing rate S of the 3D printing material 20 is adjusted by adjusting the input gray scale L in the 3D printing process, the curing rate S can be accurately adjusted, and the printing quality controllability of the 3D printing device is improved.
Or when the light energy T 'irradiating the 3D printing material 20 is low, the rate of change of the curing rate S of the 3D printing material 20 is K3'; when the light energy T 'irradiating the 3D printing material 20 is higher, the rate of change of the curing rate S of the 3D printing material 20 is K4', as follows:
S＝K3′×T′(0＜T′＜T1′)；
S＝K4′×T′+T3′(T1′＜T′＜1)；
wherein, K3'≠ K4'; (0, T1') is a region where the energy of the light irradiating the 3D printed material 20 is low. At this time, the relationship between the energy T of the light emitted by each pixel unit 110 of the 3D printing display panel 10 and the input gray level L of the pixel unit 110 is:
T＝K3×L(0＜L＜L1)；
T＝K4×L+T3(L1＜L＜L0)；
wherein, K3>0, K4>0, K3 ≠ K4, L1 × K3 ═ L1 × K4+ T3, L0 is the maximum input gray scale of the pixel unit, and L, L0 and L1 are both positive integers. L1 × K3 ═ L1 × K4+ T3 ═ T4, and T4 is an energy transition point at which the energy T of light emitted from the 3D printing display panel transitions from lower energy to higher energy.
Accordingly, when the energy T of the light emitted from each pixel unit 110 of the 3D printing display panel 10 is equal to the energy T' of the light irradiating the 3D printing material 20, the input gray level L of each pixel unit 110 and the curing rate S of the 3D printing material 20 satisfy the following formula:
S＝K3′*K3×L(0＜L＜L1)；
S＝K4′*K4×L+T3″(L1＜L＜L0)；
wherein, T3 ″, K4'× T3+ T3', that is, the input gray level L of each pixel unit 110 of the 3D printing display panel 10 and the curing rate S of the 3D printing material 20 are in the piecewise linear relationship, so that when the curing rate S of the 3D printing material 20 is adjusted by adjusting the input gray level L in the 3D printing process, the curing rate S can be accurately adjusted, and the printing quality controllability of the 3D printing apparatus 100 is improved.
If the rate of change of the curing rate S of the 3D printing material corresponding to the lower irradiation light energy T 'is less than the rate of change of the curing rate S of the 3D printing material corresponding to the higher irradiation light energy T', i.e. K3'< K4'. Fig. 5 is another relationship diagram of input gray scales and emitted light energy of a 3D printed display panel according to an embodiment of the present invention, and with reference to fig. 1 and fig. 5, K3> K4 in a relationship between energy T of light emitted by each pixel unit 110 in a 3D printed display panel 10 and input gray scale L of the pixel unit can be set. That is, when the input gray scale L of each pixel unit 110 of the 3D printing display panel 10 is low, the rate of change of the energy T of the light emitted by the 3D printing display panel 10 is high; when the input gray scale L of each pixel unit 110 of the 3D printing display panel 10 is higher, the rate of change of the energy T of the light emitted by the 3D printing display panel 10 is lower. By the arrangement, the adjustment accuracy of the curing rate S in the high gray scale region and the low gray scale region is consistent, the adjustment difficulty of the curing rate S is reduced, the adjustment accuracy is improved, and the utilization rate of gray scales is improved.
If the rate of change of the curing rate S of the 3D printing material corresponding to the lower irradiation light energy T 'is greater than the rate of change of the curing rate S of the 3D printing material corresponding to the higher irradiation light energy T', that is, K3'> K4'. Fig. 6 is another relationship diagram of input gray scale and emitted light energy of a 3D printed display panel according to an embodiment of the invention. As shown in fig. 1 and fig. 6, K3< K4 in the relationship between the energy T of the light emitted from each pixel unit 110 in the 3D printing display panel 10 and the input gray level L of the pixel unit can be set. That is, when the input gray scale L of each pixel unit 110 of the 3D printing display panel 10 is low, the rate of change of the energy T of the light emitted by the 3D printing display panel 10 is low; when the input gray scale L of each pixel unit 110 of the 3D printing display panel 10 is higher, the rate of change of the energy T of the light emitted by the 3D printing display panel 10 is higher. By the arrangement, the adjustment accuracy of the curing rate S in the high gray scale region and the low gray scale region is consistent, the adjustment difficulty of the curing rate S is reduced, the adjustment accuracy is improved, and the utilization rate of gray scales is improved.
Optionally, fig. 7 is a schematic structural diagram of another 3D printing apparatus according to an embodiment of the present invention. As shown in fig. 7, the 3D printing apparatus according to the embodiment of the present invention further includes a gamma adjusting unit 30. The gamma adjusting unit 30 is used for adjusting a corresponding relationship between an input gray scale L of a pixel unit in the 3D printing display panel 10 and a display driving signal, so as to adjust a corresponding relationship between the input gray scale L of the pixel unit 110 and an energy T of light emitted by the pixel unit 110. Wherein. The setting form of the gamma adjusting unit 30 in the 3D printing apparatus 100 and the position of the gamma adjusting unit 30 may be determined according to actual situations.
Specifically, fig. 8 is a schematic structural diagram of a 3D printing apparatus provided with a gamma adjusting unit according to an embodiment of the present invention, and as shown in fig. 8, the gamma adjusting unit 30 may be disposed on the 3D printing display panel 10. For example, the gamma adjusting unit 30 may be disposed on the printed circuit board 50 for 3D printing. The gamma adjusting unit 30 adjusts the input gray level L of each pixel unit 110 in the 3D printing display panel 10 by arranging a plurality of resistors in series or in parallel on the printed circuit board 50 and a corresponding voltage dividing circuit.
Alternatively, fig. 9 is a schematic structural diagram of another 3D printing apparatus provided with a gamma adjusting unit according to an embodiment of the present invention, and as shown in fig. 9, the 3D printing apparatus 100 further includes a driving module 40. The driving module 40 is connected to the 3D printing display panel 10, and is configured to acquire a graphic image to be printed, convert the graphic image into a display driving signal, and send the display driving signal to the 3D printing display panel 10, so that the 3D printing display panel 10 displays the graphic image. And the gamma adjusting unit 30 may be disposed on the driving module 40. The driving module 40 may be, for example, a driving IC of the 3D printing display panel 10, and the gamma adjusting unit 30 can adjust the input gray level L of the 3D printing display panel 10 by directly performing voltage division design on the driving module 40.
Optionally, fig. 10 is a schematic structural diagram of a 3D printing display panel according to an embodiment of the present invention. Referring to fig. 1 and 10, a 3D printing display panel 10 of a 3D printing apparatus 100 according to an embodiment of the present invention is a liquid crystal display panel, and at this time, the 3D printing apparatus 100 further includes a backlight 11. The backlight 11 can provide a light source for the 3D printing display panel 10, so that the 3D printing display panel 10 can display information such as images and characters by emitting light. The backlight 11 may be, for example, Electro Luminescence (EL), Cold Cathode Fluorescent Lamp (CCFL), or Light Emitting Diode (LED). In the embodiment of the present invention, the backlight 11 is preferably a near ultraviolet light backlight to meet the exposure requirement of the 3D printing material 20. Specifically, the wavelength of the backlight emitted from the backlight 11 may be 200nm to 450nm, and the wavelength of the backlight emitted from the backlight 11 is 355nm, 365nm, 385nm, 405nm, or 420 nm.
Specifically, the liquid crystal display panel is used as the 3D printing display panel 10 of the 3D printing device 100, so that the 3D printing display panel 10 serves as a light shield in the printing process, and ultraviolet light emitted by the backlight 11 is controlled to accurately expose the 3D printing material 20 at a specific pattern position. Taking the 3D printing material 20 as a negative resin, the exposed 3D printing material 20 is cured and molded.
With reference to fig. 10, the backlight 11 of the 3D printing display panel 10 provided in the embodiment of the present invention is provided with a light emitting diode LED array 111, a lens 112, and a diffusion sheet 113. The diffusion sheet 113 is disposed on a side of the lens 112 near the 3D printed display panel 10, and the LED array 111 is disposed on a side of the lens 112 far from the 3D printed display panel 10. The lens 112 of the backlight source in the 3D printing device may be selected as a fresnel lens, so that the light source provided by the LED array 111 is collimated by the fresnel lens 112 and then passes through the diffusion sheet 113, so that the light incident on the 3D printing display panel is uniformly distributed.
In addition, the 3D printing display panel in the 3D printing apparatus provided by the embodiment of the present invention may also be an OLED display panel, a QLED display panel, a micro led display panel, or a miniLED display panel.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (12)

1. A3D printing device, comprising:
the 3D printing display panel comprises a plurality of pixel units, and the energy of light rays emitted by each pixel unit has a first corresponding relation with an input gray scale;
the light emitted by the pixel unit is used for irradiating a 3D printing material to cure the 3D printing material; the curing rate of the 3D printing material and the energy of light irradiating the 3D printing material have a second corresponding relationship, and when the second corresponding relationship is a linear corresponding relationship or a piecewise linear corresponding relationship, the first corresponding relationship and the second corresponding relationship adopt the same corresponding relationship; when the second corresponding relationship is a curvilinear corresponding relationship, the first corresponding relationship is inversely related to the second corresponding relationship.
2. The 3D printing device according to claim 1, characterized in that:
the curing rate of the 3D printing material is linearly corresponding to the energy of light irradiating the 3D printing material, and the energy of the light emitted by each pixel unit is linearly corresponding to the input gray scale.
3. The 3D printing device according to claim 2, characterized in that:
the energy T of the light emitted by each pixel unit and the input gray level L meet the following conditions:
and T is L K1, wherein L is more than or equal to 0 and less than or equal to L0, K1 is more than 0, L0 is the maximum input gray scale of the pixel unit, and L0 are positive integers.
4. The 3D printing device according to claim 1, characterized in that:
the curing rate of the 3D printing material is in piecewise linear correspondence with the energy of light irradiating the 3D printing material, and the energy of the light emitted by each pixel unit is in piecewise linear correspondence with the input gray scale.
5. The 3D printing device according to claim 4, characterized in that:
the energy T of the light emitted by each pixel unit and the input gray level L meet
When L is 0, T is 0;
when L is more than or equal to 1 and less than or equal to L0, T is L × K2+ T1;
wherein K2>0, K2+ T1 ═ T2, T2>0, T2 is the minimum energy corresponding to curing of the 3D printing material, L0 is the maximum input gray level of the pixel unit, and L0 are both positive integers.
6. The 3D printing device according to claim 4, characterized in that:
the energy T of the light emitted by each pixel unit and the input gray level L meet the following conditions:
l is more than or equal to 0 and less than or equal to L1, T is L K3, L is more than or equal to 0 and less than or equal to L1;
when L is not less than L0, L is not less than L1, T is not less than L K4+ T3;
k3>0, K4>0, K3 ≠ K4, L1 ═ K3 ═ L1 ≠ K4+ T3, L0 is the maximum input gray scale of the pixel unit, and L, L0 and L1 are both positive integers.
7. The 3D printing device according to any of claims 1-6, wherein:
the 3D printing display panel is a liquid crystal display panel, and the 3D printing device further comprises a backlight source.
8. The 3D printing device according to claim 7, wherein:
the wavelength of the backlight emitted by the backlight source is 355nm, 365nm, 385nm, 405nm or 420 nm.
9. The 3D printing device according to claim 7, wherein:
the backlight source comprises a Light Emitting Diode (LED) array, a lens and a diffusion sheet, wherein the diffusion sheet is arranged on one side of the lens close to the 3D printing display panel, and the LED array is arranged on one side of the lens far away from the 3D printing display panel.
10. The 3D printing device according to any of claims 1-6, further comprising:
and the gamma adjusting unit is used for adjusting the corresponding relation between the input gray scale of the pixel unit and the display driving signal so as to adjust the corresponding relation between the input gray scale and the energy of the light emitted by the pixel unit.
11. The 3D printing device according to claim 10, further comprising:
the driving module is connected with the 3D printing display panel and used for acquiring a graphic picture to be printed, converting the graphic picture into a display driving signal and sending the display driving signal to the 3D printing display panel so that the 3D printing display panel displays the graphic picture;
the gamma adjusting unit is arranged in the driving module or in the 3D printing display panel.
12. The 3D printing device according to any of claims 1-6, wherein:
the 3D printing display panel is an organic light emitting diode OLED display panel, a quantum dot light emitting diode QLED display panel, a micro light emitting diode micro LED display panel or a mini light emitting diode miniLED display panel.
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