WO2022028305A1 - 一种用于lcd光固化3d打印机的均光方法及装置 - Google Patents

一种用于lcd光固化3d打印机的均光方法及装置 Download PDF

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WO2022028305A1
WO2022028305A1 PCT/CN2021/109274 CN2021109274W WO2022028305A1 WO 2022028305 A1 WO2022028305 A1 WO 2022028305A1 CN 2021109274 W CN2021109274 W CN 2021109274W WO 2022028305 A1 WO2022028305 A1 WO 2022028305A1
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value
light
lcd
grayscale
image data
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PCT/CN2021/109274
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English (en)
French (fr)
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邓新桥
欧阳欣
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深圳市纵维立方科技有限公司
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Priority to EP21854506.9A priority Critical patent/EP4194179A1/en
Publication of WO2022028305A1 publication Critical patent/WO2022028305A1/zh

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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
    • B29C64/124—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified
    • B29C64/129—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified characterised by the energy source therefor, e.g. by global irradiation combined with a mask
    • 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
    • B29C64/277—Arrangements for irradiation using multiple radiation means, e.g. micromirrors or multiple light-emitting diodes [LED]
    • 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
    • B29C64/286—Optical filters, e.g. masks
    • 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
    • B29C64/30—Auxiliary operations or equipment
    • B29C64/386—Data acquisition or data processing for additive manufacturing
    • B29C64/393—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
    • 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
    • B33Y10/00—Processes of additive manufacturing
    • 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
    • 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
    • B33Y50/00—Data acquisition or data processing for additive manufacturing
    • B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes

Definitions

  • the present application relates to the technical field of 3D printing, and in particular to a method and device for homogenizing light for an LCD light-curing 3D printer.
  • light-curing 3D (3 Dimensions) printers usually use a single light source or a matrix light source. Due to the error of the lamp bead itself, the limitation of the manufacturing precision of the optical device, and the error of the light transmittance of the LCD (Liquid Crystal Display, liquid crystal display) of the present application, the light energy of the curing plane is deviated. For example, the energy in the middle of the screen may be high (for example, 2000 ⁇ W/cm 2 ), while the energy around the screen may be low (for example, 1700 ⁇ W/cm 2 ), or the energy distribution of the entire screen presents an irregular distribution, and the distribution is not uniform. The uneven distribution of light energy will lead to uneven exposure of the printed model and poor printing results.
  • the present application provides a light-homing method for an LCD light-curing 3D printer, comprising the following steps: obtaining an initial grayscale value of each pixel in the image data to be printed; obtaining a pre-stored light-homing compensation value, and Performing difference calculation between the pre-stored uniform light compensation value and the initial gray value to obtain a target gray value; and controlling the LCD to perform photocuring printing on the image data to be printed according to the target gray value.
  • the present application also provides a light homogenization device for an LCD light-curing 3D printer, comprising: a data acquisition module for acquiring the initial grayscale value of each pixel in the image data to be printed; a calculation module, is used to obtain the pre-stored uniform light compensation value, and calculate the difference between the pre-stored uniform light compensation value and the initial gray value to obtain the target gray value; the control module is used to control the LCD according to the target gray value. Photo-curing the to-be-printed image data.
  • the present application provides a light-homing method for an LCD light-curing 3D printer.
  • the target gray value of the image data of the layer is generated by acquiring pre-stored light-homing compensation data, and according to the target gray value
  • Light-curing printing is performed on the image data to be printed, so that a very good uniform light effect can be obtained without making any changes to the original structure of the LCD, and the accuracy of 3D printing can be improved.
  • the requirement on the accuracy of the light source can also be reduced, but the accuracy of 3D printing can be improved.
  • Fig. 1 is a flow chart of a light-homing method for an LCD light-curing 3D printer in an embodiment of the application;
  • FIG. 2 is a flowchart of a method for obtaining a pre-stored average light value in an embodiment of the present application
  • Fig. 3a shows an energy value table of a hypothetical pixel point
  • Fig. 3b shows an energy value difference table corresponding to the energy value table of Fig. 3a
  • Fig. 3c shows a hypothetical energy value difference table from Fig. 3b Corresponding grayscale compensation table
  • Fig. 4a shows an assumed initial grayscale value of each pixel point
  • Fig. 4b shows an assumed target grayscale value of each pixel point corresponding to Fig. 4a;
  • FIG. 5 is a schematic diagram of a light homogenization device for an LCD photocuring 3D printer according to an embodiment of the application
  • FIG. 6 is a schematic diagram of a structure of a 3D printer in an embodiment of the present application.
  • FIG. 1 it is a flowchart of a method for uniform light for an LCD light-curing 3D printer in an embodiment of the application, including steps:
  • the to-be-printed image data is multi-layer image data processed by slicing software for printing 3D models.
  • the initial gray value of each pixel in the image data to be printed can be obtained by reading the slicing result of the slicing software of the 3D printer.
  • 3D printers are often equipped with slicing software, and third-party slicing software, such as Cura, Repetier, Simplify3D and other software, can be used to slice the model to obtain sliced image data.
  • the initial gray value of each pixel can be determined.
  • the initial gray value of a pixel may be 255 or 0, or other values between 0-255.
  • S12 Acquire a pre-stored uniform light compensation value, and perform a difference calculation between the pre-stored uniform light compensation value and the initial gray value to obtain a target gray value.
  • the uniform exposure of the LCD screen can be achieved through the pre-stored uniform light compensation value in the present application.
  • the uniform light compensation value is pre-stored in the storage device before the LCD light-curing printing device leaves the factory.
  • the storage device may be flash memory, ROM, RAM or any other suitable storage device, which is not limited herein.
  • the storage device can be integrated on the main control board of the LCD light-curing printing device.
  • the pre-stored uniform light compensation value corresponds to the initial gray value one-to-one. After each initial gray value and the corresponding uniform light compensation value are subjected to difference calculation, the target gray value corresponding to each initial gray value can be obtained.
  • the light-transmitting area displayed on the LCD and the target gray value of each pixel in the light-transmitting area are controlled by the controller. According to the obtained target gray value, the controller can control the LCD to perform photocuring printing.
  • the present application provides a light-homing method for an LCD light-curing 3D printer.
  • the target gray value of the image data of the layer is generated by acquiring pre-stored light-homing compensation data, and according to the target gray value
  • Light-curing printing is performed on the image data to be printed, so that a very good uniform light effect can be obtained without making any changes to the original structure of the LCD, and the accuracy of 3D printing can be improved.
  • the requirement on the accuracy of the light source can also be reduced, but the accuracy of 3D printing can be improved.
  • the step of obtaining the pre-stored difference value includes:
  • the energy value corresponding to each pixel can be measured by a test instrument when the LCD is exposed to the full screen.
  • a commercially available UV tester can be used to measure the energy value of each pixel of an LCD screen.
  • the printer can integrate a detection module, and the hardware structure corresponding to the detection module is the light energy detection device on the printer. When the LCD is exposed to the full screen, the light energy detection device is turned on to scan the energy value corresponding to each pixel of the screen, and the scanning is completed. When the detection module sends the collected energy value data to the processor of the printer.
  • S22 Determine the minimum value of the energy values, and calculate the difference between each of the energy values and the minimum value, respectively, to obtain an energy value difference table.
  • S23 Determine a grayscale compensation table corresponding to the energy value difference table according to the corresponding relationship between the energy value and the grayscale value, wherein each grayscale value in the grayscale compensation table is the pre-stored uniform light compensation value.
  • FIG. 3c is a grayscale compensation table corresponding to FIG. 3b obtained according to the corresponding relationship between the energy value and the grayscale value.
  • the grayscale values from top to bottom and left to right are: 0, 21, 40, 21, 21, 40, 40, 21, 21, 40, 40, 21, 0, 21, 21,0. It should be understood that the grayscale compensation values shown in FIG. 3c are only hypothetical, not necessarily real data, and the authenticity of these data will not affect the scope of this patent, but is only to better illustrate the technology of this patent scheme for easy understanding.
  • the grayscale compensation values of all pixels of the LCD are pre-stored.
  • the initial grayscale value of a pixel is zero, the corresponding target grayscale value is set to zero .
  • the corresponding relationship between the energy value and the gray value is:
  • y ij is the pre-stored uniform light compensation value in the ith row and jth column in the grayscale compensation table
  • the x ij is the energy difference value in the ith row and jth column in the energy value difference table
  • k and c are constants.
  • the value range of k is 1-4
  • the value range of c is 0-10.
  • the value range of the uniform light compensation value is 0-30.
  • a light leveling device for LCD light-curing 3D printers suitable for the above light leveling method is disclosed, as shown in FIG. 5 , including:
  • a data acquisition module for acquiring the initial grayscale value of each pixel in the image data to be printed
  • a calculation module configured to obtain a pre-stored uniform light compensation value, and perform a difference calculation between the pre-stored uniform light compensation value and the initial gray value to obtain a target gray value
  • a control module configured to control the LCD to perform photocuring on the to-be-printed image data according to the target grayscale value.
  • a light homogenization device for an LCD light curing 3D printer that is suitable for the above light homogenization method provided by the embodiments of the present application can implement the embodiments of the above method, and its implementation principles and technical effects are similar, and will not be repeated here. .
  • an LCD light-curing 3D printer 200 is disclosed, as shown in FIG. 6 , including an LCD 201 and a controller 202.
  • the controller 201 is used to control the grayscale value of each pixel on the LCD 201 during the 3D printing process by the above-mentioned uniform light method.
  • the LCD light-curing 3D printer provided by the embodiments of the present application can execute the embodiments of the above-mentioned methods, and the realization principle and technical effect thereof are similar, which will not be repeated here.
  • the present application also provides a computer-readable medium, and the computer-readable medium may be included in the electronic device (such as a light homogenizer or a 3D printer) described in the foregoing embodiments; it may also be a separate medium. exists without being incorporated into the electronic device.
  • the above computer readable medium carries one or more programs, when the one or more programs are executed by an electronic device, the electronic device can implement the light homogenization method described in the above embodiments.

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Abstract

一种用于LCD光固化3D打印机的均光方法，包括：获取待打印图像数据中每个像素点的初始灰度值；获取预存均光补偿值，并将所述预存均光补偿值与所述初始灰度值进行差值计算，得到目标灰度值；以及控制所述LCD根据所述目标灰度值对所述待打印图像数据进行光固化打印。本申请公开的方法能够解决现有技术光固化3D打印曝光不均匀的问题，提高打印质量。本申请还对应公开了用于LCD光固化3D打印机的均光装置及打印机。

Description

一种用于LCD光固化3D打印机的均光方法及装置 技术领域
本申请涉及3D打印技术领域，具体涉及一种用于LCD光固化3D打印机的均光方法及装置。
背景技术
目前光固化3D(3 Dimensions，3维)打印机通常都是采用单光源或者矩阵光源。由于灯珠本身的误差、光学器件的制造精度限制和LCD(Liquid Crystal Display，液晶显示器)本申请透光的误差，导致固化平面的光能量的大小是存在偏差的。例如，屏幕中间能量可能高(例如2000μW/cm 2)，而四周的能量可能较低(例如1700μW/cm 2)，或者是整个屏幕的能量分布呈现一个不规则的分布，而且分布不均匀。光能量的不均匀分布会导致打印模型曝光不均匀，打印效果不好。
发明内容
鉴于现有技术中的上述缺陷或不足，期望提供一种用于LCD光固化3D打印机的均光方法及装置，能够解决现有技术中光固化3D打印曝光不均匀的问题。
第一方面，本申请提供了一种用于LCD光固化3D打印机的均光方法，包括如下步骤：获取待打印图像数据中每个像素点的初始灰度值；获取预存均光补偿值，并将所述预存均光补偿值与所述初始灰度值进行差值计算，得到目标灰度值；以及控制所述LCD根据所述目标灰度值对所述待打印图像数据进行光固化打印。
第二方面，本申请还提供了一种用于LCD光固化3D打印机的均光装置，包括：获取数据模块，用于获取待打印图像数据中每个像素点的初始灰度值；计算模块，用于获取预存均光补偿值，并将所述预存均光补偿值与初始灰度值进行差值计算，得到目标灰度值；控制模 块，用于控制所述LCD根据所述目标灰度值对所述待打印图像数据进行光固化。
本申请提供了用于LCD光固化3D打印机的均光方法，在打印每一层时，通过获取预存的均光补偿数据，来生成该层图像数据的目标灰度值，并根据目标灰度值对待打印图像数据进行光固化打印，这样就可以在不对LCD的原有结构进行任何改变的情况下，获得非常好的均光效果，提高了3D打印的精度。同时，采用本申请技术方案，也可以降低对光源精度的要求，但却可以提高3D打印的精度。
附图说明
图1为本申请的实施例中一种用于LCD光固化3D打印机的均光方法的流程图；
图2为本申请的实施例中一种预存均光值的获取方法的流程图；
图3a示出了一个假定的像素点的能量值表，图3b示出了与图3a的能量值表对应的能量值差异表，图3c示出了一个假定的与图3b的能量值差异表对应的灰度补偿表；
图4a示出了一个假定的各像素点的初始灰度值，图4b示出了一个假定的与图4a对应的各像素点的目标灰度值；
图5为本申请的实施例中一种用于LCD光固化3D打印机的均光装置的示意图；
图6为本申请的实施例中一种3D打印机结构的示意图。
具体实施方式
下面结合附图和实施例对本申请作进一步的详细说明。可以理解的是，此处所描述的具体实施例仅仅用于解释相关发明，而非对该发明的限定。另外还需要说明的是，为了便于描述，附图中仅示出了与发明相关的部分。
需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。下面将参考附图并结合实施例来详细说明本申请。
在LCD光固化3D打印机中，都是采用单光源或者矩阵光源。由于灯珠本身的误差，光学器件制造精度以及LCD本身透过的误差，导致固化平面的光能量大小是存在偏差的。为了解决这一问题，在本申请的一个实施例中，公开了一种用于LCD光固化3D打印机的均光方法。如图1所示，为本申请的实施例中的一种用于LCD光固化3D打印机的均光方法的流程图，包括步骤：
S11，获取待打印图像数据中每个像素点的初始灰度值。
进一步地，所述待打印图像数据为经切片软件处理后的用于打印3D模型的多层图像数据。一般可以通过读取3D打印机的切片软件的切片结果获取待打印图像数据中每个像素点的初始灰度值。3D打印机往往会配有切片软件，也可以通过第三方切片软件，如Cura，Repetier、Simplify3D等软件对模型进行切片以得到切片后的图像数据。当切片完成后，对于每层切片图像，均可以确定每个像素点的初始灰度值。例如，像素点的初始灰度值可能为255或0，也可能为0-255之间的其他数值。
S12，获取预存均光补偿值，并将所述预存均光补偿值与所述初始灰度值进行差值计算，得到目标灰度值。
在光固化3D打印中，由于光源的排布结构、灯珠本身的误差、光学器件的制造精度限制和LCD本申请透光的误差等因素，即便是待打印图像数据中的每个像素点的初始灰度值都是一样的，也会出现LDC屏幕中间能量高，边缘能量低的情况。为了使LCD屏幕的能量分布均匀，在不对LCD的电气及机械结构做任何改变的情况下，通过本申请预存的均光补偿值，可以实现LCD屏幕均匀曝光。均光补偿值在LCD光固化打印设备出厂前就已经预存在存储设备中。该存储设备可能是闪存、ROM、RAM或其他任何合适的存储设备，在此并不限制。该存储设备可集成在LCD光固化打印设备的主控板上。预存的均光补偿值与初始灰度值一一对应，每个初始灰度值与对应的均光补偿值进行差值计算后，就可得到各初始灰度值对应的目标灰度值。
S13，控制所述LCD根据所述目标灰度值对所述待打印图像数据进行光固化打印。
LCD上显示的透光区域以及透光区域每个像素点的目标灰度值是由控制器控制的。根据获取到的目标灰度值，控制器可控制LCD以进行光固化打印。
本申请提供了用于LCD光固化3D打印机的均光方法，在打印每一层时，通过获取预存的均光补偿数据，来生成该层图像数据的目标灰度值，并根据目标灰度值对待打印图像数据进行光固化打印，这样就可以在不对LCD的原有结构进行任何改变的情况下，获得非常好的均光效果，提高了3D打印的精度。同时，采用本申请技术方案，也可以降低对光源精度的要求，但却可以提高3D打印的精度。
为了确定LDC每个像素点的均光补偿值，实现LCD均匀曝光，在本申请的一个实施例中，所述预存差异值获取步骤包括：
S21，获取在所述LCD全屏曝光时屏幕每个像素点对应的能量值。
每个像素点对应的能量值可以在LCD全屏曝光时通过测试仪器测量出来。例如市面上可买到的紫外线测试仪，可以用来测量LCD屏幕每个像素点的能量值。或者，打印机可集成一个检测模块，该检测模块对应的硬件结构为打印机上的光能量检测装置，在LCD全屏曝光时，开启光能量检测装置以扫描屏幕每个像素点对应的能量值，扫描完成时，检测模块将采集到的能量值数据发送给打印机的处理器。
S22，确定所述能量值中的最小值，并分别计算各个所述能量值与最小值的差值，得到能量值差异表。
如图3a-3b所示，以一个4*4像素的显示屏为例，假设测得的各像素点从上到下从左到右的能量值依次为：100,110,120,110,110,120,120,110,110,120,120,100,100,110,110,100μW/cm 2。很显然，能量值中的最小值为100μW/cm 2。然后将各个能量值与100μW/cm 2作差，得到的对应差值分别为：0,10,20,10,10,20,20,10,10,20,20,10,0,10,10,0。应理解，图3a所示的能量值只是假设的，并不一定是真实的数据，这些数据的真实性与否并不会影响本专利的范围，只是为了更好的阐述本专利的技术方案，便于理解。
S23，根据能量值与灰度值的对应关系，确定所述能量值差异表对应的灰度补偿表，其中，所述灰度补偿表中的各个灰度值为所述预存 均光补偿值。
根据本申请的一个实施例，图3c为根据能量值与灰度值的对应关系得到的与图3b所对应的灰度补偿表。在灰度补偿表中，各灰度值从上到下从左到右分别为：0,21,40,21,21,40,40,21,21,40,40,21,0,21,21,0。应理解，图3c所示的灰度补偿值只是假设的，并不一定是真实的数据，这些数据的真实性与否并不会影响本专利的范围，只是为了更好的阐述本专利的技术方案，便于理解。
在灰度补偿表中，预存了LCD所有像素点的灰度补偿值。但是，针对每层图像数据，并不是每个像素点都需要透光。因此，在本申请的一个实施例中，为了让控制器减少不必要的计算，对于每层图像数据，若像素点的初始灰阶值为零，则将对应的所述目标灰度值置零。
如图4a所示，同样以一个4*4像素的显示屏为例，假设某层图像数据的初始灰度值从上到下从左到右分别为：255,255,255,255,255,255,255,255,255,255,255,255,0,0,0,0，并且假设各像素点的灰度补偿值为图3c所示，那么各像素点的目标补偿值则如图4b所示，从上到下从左到右分别为：255,234,215,234,234,215,215,234,234,215,215,234,0,0,0,0。从图中可以看出，对于初始灰度值为零的像素点，其目标灰度值也直接置零了。应理解，图4a和图4b所示的初始灰度值及目标灰度值只是假设的，并不一定是真实的数据，这些数据的真实性与否并不会影响本专利的范围，只是为了更好的阐述本专利的技术方案，便于理解。
进一步地，在本申请的一个实施例中，所述能量值与灰度值的对应关系为：
y ij＝kx ij+c
其中，y ij为所述灰度补偿表中的第i行第j列的预存均光补偿值，所述x ij为所述能量值差异表中的第i行第j列的能量差值，k和c为常数。
具体地，k的取值范围为1-4，c的取值范围为0-10。常数k和c在此范围取值时，可确保均光补偿值为最优补偿值，提升均光效果。
进一步地，在本申请的一个实施例中，所述均光补偿值的数值范 围为0-30。
在本申请的一个实施例中，公开了一种适用于上述均光方法的用于LCD光固化3D打印机的均光装置，如图5所示，包括：
数据获取模块，用于获取待打印图像数据中每个像素点的初始灰度值；
计算模块，用于获取预存均光补偿值，并将所述预存均光补偿值与初始灰度值进行差值计算，得到目标灰度值；
控制模块，用于控制所述LCD根据所述目标灰度值对所述待打印图像数据进行光固化。
本申请的实施例所提供的一种适用于上述均光方法的用于LCD光固化3D打印机的均光装置，可以执行上述方法的实施例，其实现原理和技术效果类似，在此不再赘述。
在本申请的一个实施例中，公开了一种LCD光固化3D打印机200，如图6所示，包括LCD 201和控制器202。其中，所述控制器201用于上述的均光方法控制3D打印过程中所述LCD 201上每个像素点的灰度值。
本申请的实施例所提供的一种LCD光固化3D打印机，可以执行上述方法的实施例，其实现原理和技术效果类似，在此不再赘述。
作为另一方面，本申请还提供了一种计算机可读介质，该计算机可读介质可以是上述实施例中描述的电子设备(如均光装置或3D打印机)中所包含的；也可以是单独存在，而未装配入该电子设备中。上述计算机可读介质承载有一个或者多个程序，当上述一个或者多个程序被一个该电子设备执行时，使得该电子设备实现如上述实施例中所述的均光方法。
以上所揭露的仅为本发明一种较佳实施例而已，当然不能以此来限定本发明之权利范围，本领域普通技术人员可以理解实现上述实施例的全部或部分流程，并依本发明权利要求所作的等同变化，仍属于发明所涵盖的范围。

Claims (10)

  1. 一种用于LCD光固化3D打印机的均光方法，其特征在于，包括如下步骤：
    获取待打印图像数据中每个像素点的初始灰度值；
    获取预存均光补偿值，并将所述预存均光补偿值与所述初始灰度值进行差值计算，得到目标灰度值；以及
    控制所述LCD根据所述目标灰度值对所述待打印图像数据进行光固化打印。
  2. 根据权利要求1所述的均光方法，其特征在于，所述预存均光补偿值获取步骤包括：
    获取在所述LCD全屏曝光时屏幕每个像素点对应的能量值；
    确定所述能量值中的最小值，并分别计算各个所述能量值与最小值的差值，得到能量值差异表；以及
    根据能量值与灰度值的对应关系，确定所述能量值差异表对应的灰度补偿表，其中，所述灰度补偿表中的各个灰度值为所述预存均光补偿值。
  3. 根据权利要求1所述的均光方法，其特征在于，所述待打印图像数据为经切片软件处理后的用于打印3D模型的多层图像数据。
  4. 根据权利要求3所述的均光方法，其特征在于，对于每层图像数据，若像素点的初始灰阶值为零，则将对应的所述目标灰度值置零。
  5. 根据权利要求2所述的均光方法，其特征在于，所述能量值与灰度值的对应关系为：
    y ij＝kx ij+c
    其中，y ij为所述灰度补偿表中的第i行第j列的预存均光补偿值，所述x ij为所述能量值差异表中的第i行第j列的能量差值，k和c为常 数。
  6. 根据权利要求5所述的均光方法，其特征在于，k的取值范围为1-4，c的取值范围为0-10。
  7. 根据权利要求2所述的均光方法，其特征在于，所述均光补偿值的数值范围为0-30。
  8. 一种适用于权利要求1-7的均光方法的用于LCD光固化3D打印机的均光装置，其特征在于，包括：
    数据获取模块，用于获取待打印图像数据中每个像素点的初始灰度值；
    计算模块，用于获取预存均光补偿值，并将所述预存均光补偿值与初始灰度值进行差值计算，得到目标灰度值；
    控制模块，用于控制所述LCD根据所述目标灰度值对所述待打印图像数据进行光固化。
  9. 一种LCD光固化3D打印机，其特征在于，包括控制器和LCD，其中，
    所述控制器用于根据权利要求1-7任意一项所述的均光方法控制3D打印过程中所述LCD上每个像素点的灰度值。
  10. 一种非暂态计算机可读存储介质，其特征在于，所述非暂态计算机可读存储介质存储计算机指令，所述计算机指令使得所述计算机执行如权利要求1-7任一项所述的方法。
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Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112606389B (zh) * 2020-11-30 2022-08-16 深圳市创想三维科技股份有限公司 一种光固化3d打印机屏幕光强调节方法及调节装置
CN112959661B (zh) * 2021-01-26 2024-02-02 深圳市创必得科技有限公司 Lcd光固化3d打印均光优化补偿方法及装置
CN112848301B (zh) * 2021-01-26 2024-02-23 深圳市创必得科技有限公司 Lcd光固化3d打印均光优化补偿方法与装置
CN112959662A (zh) * 2021-01-26 2021-06-15 深圳市创必得科技有限公司 Lcd光固化3d打印均光优化补偿装置及方法
CN113409222A (zh) * 2021-06-30 2021-09-17 深圳市纵维立方科技有限公司 图像处理方法、打印方法、打印相关装置及可读存储介质
CN114281274A (zh) * 2021-11-30 2022-04-05 深圳市纵维立方科技有限公司 光亮度均匀性的调节方法、打印方法、打印系统及设备
CN114536748A (zh) * 2022-01-28 2022-05-27 华南理工大学 3d打印机动态均光与曝光时间补偿方法、系统和设备
CN114683539A (zh) * 2022-03-07 2022-07-01 深圳市创必得科技有限公司 Lcd三维打印均光方法和装置
CN116277982B (zh) * 2023-03-10 2024-06-04 深圳市纵维立方科技有限公司 一种打印控制方法、光固化三维打印机及可读存储介质
KR20230174793A (ko) * 2022-06-21 2023-12-29 주식회사 엠오피(M.O.P Co., Ltd.) 고정밀도 세라믹 3d 프린팅을 위한 이미지처리 방법 및 이를 활용한 고정밀도 세라믹 3d 프린팅 방법
CN116442523B (zh) * 2023-06-09 2023-09-26 先临三维科技股份有限公司 一种光均匀性调节方法、装置、设备和存储介质

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101063811A (zh) * 2006-04-28 2007-10-31 想象科技有限公司 通过掩膜曝光生成三维对象的设备和方法
CN106273487A (zh) * 2016-08-17 2017-01-04 苏州秉创科技有限公司 一种dlp打印设备投影仪光强自动校准设备及校准方法
CN106600678A (zh) * 2016-12-15 2017-04-26 山东大学苏州研究院 一种面成型增材制造系统光辐照度均匀化处理方法
US20180126647A1 (en) * 2015-03-09 2018-05-10 Schultheiss Gmbh Method and device for correcting an inhomogeneous intensity distribution of a radiation field generated by a radiation source
US10033976B2 (en) * 2006-10-06 2018-07-24 Seiko Epson Corporation Projection display apparatus and projection display method
CN109817179A (zh) * 2019-03-27 2019-05-28 上海天马微电子有限公司 液晶显示面板亮度调节方法、调节系统及3d打印装置
CN209176181U (zh) * 2018-12-13 2019-07-30 苏州博理新材料科技有限公司 光固化3d打印机投影仪光照校正装置
WO2020006260A1 (en) * 2018-06-28 2020-01-02 3D Systems, Inc. Three-dimensional printing system with integrated scan module calibration

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107756784B (zh) * 2017-09-29 2019-11-12 深圳晗竣雅科技有限公司 基于dlp快速成型技术的切片图匀光方法及系统
CN107756814A (zh) * 2017-11-28 2018-03-06 上海联泰科技股份有限公司 检测系统、方法及所适用的3d打印设备

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101063811A (zh) * 2006-04-28 2007-10-31 想象科技有限公司 通过掩膜曝光生成三维对象的设备和方法
US10033976B2 (en) * 2006-10-06 2018-07-24 Seiko Epson Corporation Projection display apparatus and projection display method
US20180126647A1 (en) * 2015-03-09 2018-05-10 Schultheiss Gmbh Method and device for correcting an inhomogeneous intensity distribution of a radiation field generated by a radiation source
CN106273487A (zh) * 2016-08-17 2017-01-04 苏州秉创科技有限公司 一种dlp打印设备投影仪光强自动校准设备及校准方法
CN106600678A (zh) * 2016-12-15 2017-04-26 山东大学苏州研究院 一种面成型增材制造系统光辐照度均匀化处理方法
WO2020006260A1 (en) * 2018-06-28 2020-01-02 3D Systems, Inc. Three-dimensional printing system with integrated scan module calibration
CN209176181U (zh) * 2018-12-13 2019-07-30 苏州博理新材料科技有限公司 光固化3d打印机投影仪光照校正装置
CN109817179A (zh) * 2019-03-27 2019-05-28 上海天马微电子有限公司 液晶显示面板亮度调节方法、调节系统及3d打印装置

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