Micro system for LCD (Liquid Crystal Display) photocuring 3D (Three-Dimensional) printer
By using a microlens assembly and a moving adjustment mechanism, uniform light exposure and image stitching are achieved in an LCD photopolymerization 3D printer, solving the problems of large pixels and low light efficiency in black and white LCD screens, and realizing micro-nano-level 3D printing and high-precision molding.
Patent Information
- Application Number
- CN202423303135.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2034-12-31
AI Technical Summary
Existing monochrome LCD screens have large pixels and low light efficiency, making it difficult to achieve precise micro-nano 3D printing. Furthermore, the opaque areas prevent the photocurable adhesive from being fully exposed and cured, resulting in a low yield.
A microlens array is used to converge and image light, and the image position is changed by a moving adjustment mechanism. Combined with the refraction effect of the flat glass, uniform exposure of light and image stitching are achieved in the 3D printing area.
It enables micro-nano-level 3D printing, reduces costs, extends LCD screen lifespan, improves printing accuracy and yield, expands resolution, and ensures uniform curing of materials.
Smart Images
Figure CN223657627U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to additive manufacturing technical field especially a kind of microsystem for LCD photocuring 3D printer.
BACKGROUND TECHNIQUE
[0002] Additive manufacturing LCD photocuring 3D printer, with high resolution, low cost and other advantages.LCD as light modulation medium, the structure and resolution of hardware itself also determine the precision of final 3D printing formation.
[0003] However, the current use of black and white LCD screen pixel is relatively large, generally greater than 10um, which makes it difficult to be used for precision micro-nano 3D printing;There is also a black and white LCD screen light efficiency is very low, the reason is directly from color screen process, resulting in most of the area not to be transparent, these not to be transparent part causes photocuring glue not to be fully exposed and cured, at the same time, it causes not to be applicable to many materials, insufficient adhesion, low yield.
[0004] For example, Figure 7 The display principle diagram for monochrome LCD pixel is only to reduce the original red, green and blue pixel to a light-transmitting pixel for reducing cost. Figure 8 As can be seen, pixel opening area 11 is not closely arranged together, and there is a gap between pixels. In black and white LCD screen, most of them are not transparent, which causes photocuring glue not to be fully exposed and cured, thereby resulting in low yield and completely unable to print for some materials.
[0005] Therefore, the utility model is proposed to solve the above problems.
UTILITY MODEL CONTENT
[0006] The utility model aims at overcoming the defects of prior art, providing a kind of microsystem for LCD photocuring 3D printer, converging lens group converging light rays are microimaged in the printing formation area of 3D printing device by micro-lens group, realize micro-nano 3D printing, effectively reduce cost, at the same time, since LCD screen does not bear the external force of general 3D printing, effectively prolong the life of LCD screen.
[0007] The utility model is realized by the following technical schemes:
[0008] A kind of microsystem for LCD photocuring 3D printer, including light source, LCD screen 1, converging lens group 2, micro-lens group 3 in order along light emitting light path;
[0009] The light source is used to emit light for providing exposure energy for photocuring material;
[0010] The LCD screen 1 is used to receive light emitted by light source and form image by pixel control the light.
[0011] The converging lens group 2 is used to change the direction of the light rays emitted by the LCD screen 1 and converges the changed light rays to the micro-lens group 3.
[0012] The micro-lens group 3 is used to micro the light rays converged by the converging lens group 2 and image the microed light rays to the printing forming area of the 3D printing device.
[0013] The micro system for the LCD photocuring 3D printer as described above, the micro-lens group 3 comprises a micro-lens 31 and a collimating lens 32; the micro-lens 31 is used to micro the light rays converged by the converging lens group 2 and emit the microed light rays to the collimating lens 32; the collimating lens 32 is used to collimate the chief rays microed by the micro-lens 31 into parallel light and image the display image of the LCD screen 1 to the printing forming area of the 3D printing device.
[0014] The micro system for the LCD photocuring 3D printer as described above, the converging lens group 2 is a glass lens or a Frensel lens.
[0015] The micro system for the LCD photocuring 3D printer as described above, further comprises a first moving adjusting mechanism used to drive the relative movement of the LCD screen 1 or the micro-lens group 3 so that the image of the printing forming area of the 3D printing device moves to the corresponding position.
[0016] The micro system for the LCD photocuring 3D printer as described above, further comprises a flat glass 4 which can be adjusted to rotate around the X axis and / or the Y axis, the flat glass 4 is located between the micro-lens group 3 and the printing forming area of the 3D printing device, the flat glass 4 is used to receive the light rays microed by the micro-lens group 3 and make the chief rays produce displacement due to refraction and then emit to the printing forming area of the 3D printing device, the image displacement distance of the flat glass 4 is:
[0017]
[0018] Wherein, h is the thickness of the glass, θ is the rotation angle, and n is the refractive index of the glass.
[0019] The micro system for the LCD photocuring 3D printer as described above, further comprises a flat glass 4 which can be adjusted to rotate around the X axis and / or the Y axis, the flat glass 4 is located between the LCD screen 1 and the converging lens group 2, the flat glass 4 is used to receive the light rays emitted by the LCD screen 1 and make the light rays produce refraction translation and then emit to the converging lens group 2.
[0020] The micro system for the LCD photocuring 3D printer, the LCD screen 1, the converging lens group 2 and the micro lens group 3 are relatively fixedly arranged, and the micro system further comprises a second movement adjusting mechanism for driving the LCD screen 1, the converging lens group 2 and the micro lens group 3 to move correspondingly to realize image splicing exposure.
[0021] The utility model discloses a micro-nano 3D printing method for an LCD screen, which uses the micro system for the LCD photocuring 3D printer as described above, and the method comprises the following steps:
[0022] The light source emits light, the light is irradiated on the converging lens group 2 after passing through the LCD screen 1, then the converging lens group 2 converges the light passing through the LCD screen 1 on the micro lens group 3, and then the micro lens group 3 converges the light converged by the converging lens group 2 and forms an image on the printing forming area of the 3D printing device.
[0023] Compared with the prior art, the utility model has the following advantages:
[0024] 1. The micro lens group converges the light converged by the converging lens group and forms an image on the printing forming area of the 3D printing device, so that micro-nano 3D printing is realized, the cost is effectively reduced, and the service life of the LCD screen is effectively prolonged because the LCD screen does not bear external force during general 3D printing.
[0025] 2. The first movement adjusting mechanism drives the LCD screen or the micro lens group to move relatively so that the image on the printing forming area of the 3D printing device moves to a corresponding position for re-exposure, thereby completely filling the non-transparent area and making the entire area be exposed, and then the image on the LCD screen is changed, and the precision and fineness of the 3D printing product are enhanced.
[0026] 3. The flat glass receives the light converged by the micro lens group and makes the main light ray displace due to refraction and then exit the printing forming area of the 3D printing device, so that the position of the exposure point is changed, the resolution is expanded, the solidified material is uniformly and completely solidified, and the printing quality is improved.
[0027] 4. The second movement adjusting mechanism drives the LCD screen, the converging lens group and the micro lens group to move correspondingly to realize image splicing exposure, so that large-size micro-nano 3D printing is realized.
DESCRIPTION OF DRAWINGS
[0028] The specific embodiments of the utility model will be further described in detail below with reference to the drawings, in which:
[0029] Figure 1 It is a structural schematic view of the utility model embodiment 1.
[0030] Figure 2 It is a schematic view of the pixel array of the embodiment 1 of the utility model.
[0031] Figure 3 It is a structural schematic view of the embodiment 2 of the utility model.
[0032] Figure 4 It is a structural schematic view of the embodiment 3 of the utility model.
[0033] Figure 5 It is a structural schematic view of the embodiment 4 of the utility model.
[0034] Figure 6 It is a display principle schematic view of single pixel of color liquid crystal screen.
[0035] Figure 7 It is a display principle schematic view of monochrome LCD pixel one.
[0036] Figure 8 It is a display principle schematic view of monochrome LCD pixel two.
CONCRETE IMPLEMENTATION
[0037] The following will be combined with the drawings of the utility model Figures 1-8 The embodiment of the utility model is explained in detail.
[0038] As Figures 1-5 Indicated, the utility model discloses a LCD light curing 3D printer with microfilm system, including light source, LCD screen 1, converging lens group 2, micro-lens group 3 in order along the light emission light path,
[0039] The light source is used to emit the light for providing exposure energy for light curing material;
[0040] The LCD screen 1 is used to receive the light emitted by the light source and control the light through the image formation according to the pixel;
[0041] The converging lens group 2 is used to change the direction of the light emitted by the LCD screen 1 and converges the changed light in the micro-lens group 3;
[0042] The micro-lens group 3 is used to micro the light converging by the converging lens group 2 and image in the printing forming area of 3D printing device. The utility model realizes micro-nano level 3D printing by micro-lens group to the light converging by the converging lens group and image in the printing forming area of 3D printing device, effectively reduces the cost, and at the same time, since the LCD screen does not bear the external force of general 3D printing, effectively prolongs the service life of the LCD screen.
[0043] As Figure 1 、 3 -5 shows that the main light of incident LCD screen 1 is parallel light.
[0044] The light emitting light path is coaxial with the Z axis or is parallelly arranged in the utility model, the LCD screen 1, the converging lens group 2 and the micro-lens group 3 are all parallel to each other and perpendicular to the Z axis, as shown in Figure 1 、 3 -5.
[0045] As shown in Figure 1 、 3 -5, the micro-lens group 3 includes micro-lens 31 and collimating lens 32; the micro-lens 31 is used to emit the light rays converged by the converging lens group 2 to the collimating lens 32 after micro-lensing; the collimating lens 32 is used to collimate the chief rays micro-lensed by the micro-lens 31 into parallel light and then image the display image of the LCD screen 1 on the printing forming area of the 3D printing device.
[0046] Preferably, in order to improve the converging effect, the converging lens group 2 is a glass lens or a Feni lens.
[0047] It also includes a first movement adjusting mechanism for driving the relative movement of the LCD screen 1 or the micro-lens group 3 so that the image on the printing forming area of the 3D printing device moves to the corresponding position. In the embodiment, the first movement adjusting mechanism is configured to drive the corresponding movement of the LCD screen 1 or the micro-lens group 3 along the X axis or Y axis direction, so that the image on the printing forming area of the 3D printing device moves to the corresponding position for re-exposure, so that the entire area is completely exposed, as shown in Figure 2 , and then the image on the LCD screen is changed, enhancing the accuracy and fineness of the 3D printing product.
[0048] As shown in Figure 2 , the original pixels are 100 and 200, and the two pixels are moved 5 times in the X axis direction and 1 time in the Y axis direction, so that the entire area is completely exposed.
[0049] As shown in Figure 3 , it also includes a flat glass 4 that can be adjusted to rotate around the X axis and / or the Y axis, the flat glass 4 is located between the micro-lens group 3 and the printing forming area of the 3D printing device, the flat glass 4 is used to receive the light rays micro-lensed by the micro-lens group 3 and make the chief rays displace due to refraction and then exit the printing forming area of the 3D printing device, so as to change the position of the exposure point, realize the expansion of the resolution and the uniform complete curing of the curing material, and improve the printing quality. In the embodiment, the directions of the incident light and the exit light in the flat glass 4 are the same, as shown in Figure 3 , they are both parallel light. The distance of the above image displacement is:
[0050]
[0051] Wherein, h is the thickness of the glass, θ is the rotation angle, and n is the refractive index of the glass.
[0052] As shown in Figure 4 Also includes the flat glass 4 that can be adjusted around X axis and / or Y axis rotation, the flat glass 4 is located between the LCD screen 1 and the converging lens group 2, the flat glass 4 is used to receive the light rays emitted by the LCD screen 1 and makes the light rays produce refraction translation and then emit to the converging lens group 2, when the flat glass 4 rotates, the light rays produce translation to realize the offset of the image position of the pixel point. Figure 4 As shown in
[0053] As shown in Figure 5 The LCD screen 1, the converging lens group 2 and the micro-lens group 3 are relatively fixedly arranged, and a second movement adjusting mechanism for driving the LCD screen 1, the converging lens group 2 and the micro-lens group 3 to move correspondingly to realize pattern splicing exposure is further included.
[0054] The utility model discloses utilize the gap between pixels, through change the position of pixel on the light curing material makes material fully solidified, simultaneously when changing the position of light spot also changes the pattern of LCD screen, thereby expansion LCD resolution is doubled.
[0055] The utility model discloses under the premise of not changing the LCD screen original resolution, through the movement of optical path mechanism, change image position reaches the effect of doubling the resolution of LCD light curing 3D printer and can carry out large -size 3D micro -nanometer printing, increase the fullness of exposure area, compactness simultaneously, improve printing yield.
[0056] Figure 7 It is the display principle schematic diagram of single pixel of color liquid crystal screen, including three pixel opening areas 11, usually respectively red color, green color and blue color, thereby generating the image of single color pixel.
[0057] The utility model discloses a kind of LCD screen carries out micro-nano 3D printing method, uses a kind of micro-system for LCD light curing 3D printer as described above, the method includes the following steps: control light source to emit light, light is irradiated on converging lens group 2 after passing through LCD screen 1, then converging lens group 2 converges the light of passing through LCD screen 1 on micro-lens group 3, after which micro-lens group 3 converges the light of converging lens group 2 and forms image on the printing forming area of 3D printing device, can realize micro-nano grade 3D printing, effectively reduce cost, improve printing yield.
Claims
1. A microfiber system for an LCD photopolymer 3D printer, characterized in that... The light source, LCD screen (1), converging lens group (2), and microlens group (3) are arranged sequentially along the light emission path; The light source is used to emit light that provides exposure energy for the photocurable material; The LCD screen (1) is used to receive light emitted from a light source and control the light to pass through in pixels to form an image; The converging lens group (2) is used to change the direction of the light emitted from the LCD screen (1) and converge the changed light onto the microlens group (3); The microlens group (3) is used to miniaturize the light rays converged by the converging lens group (2) and image them onto the printing area of the 3D printing device.
2. The microfiber system for an LCD photopolymer 3D printer according to claim 1, characterized in that... The microlens group (3) includes a microlens (31) and a collimating lens (32); The microlens (31) is used to shrink the light rays converged by the converging lens group (2) and then emit them into the collimating lens (32); The collimating lens (32) is used to collimate the principal ray of the miniaturized lens (31) into parallel light, and then image the display pattern of the LCD screen (1) onto the printing area of the 3D printing device.
3. The microfiber system for an LCD photopolymer 3D printer according to claim 1, characterized in that... It also includes a first motion adjustment mechanism for driving the LCD screen (1) or the microlens group (3) to move relative to each other so that the image in the printing area of the 3D printing device is moved to the corresponding position.
4. The microfiber system for an LCD photopolymerization 3D printer according to claim 2, characterized in that... It also includes a flat glass (4) that can be rotated and adjusted around the X-axis and / or Y-axis. The flat glass (4) is located between the microlens group (3) and the printing area of the 3D printing device. The flat glass (4) is used to receive light after it has been miniaturized by the microlens group (3) and to make the main light ray displaced due to refraction and then emitted into the printing area of the 3D printing device.
5. A microfiber system for an LCD photopolymerization 3D printer according to claim 1 or 2, characterized in that... It also includes a flat glass (4) that can be rotated and adjusted around the X-axis and / or Y-axis. The flat glass (4) is located between the LCD screen (1) and the converging lens group (2). The flat glass (4) is used to receive the light emitted from the LCD screen (1) and refract and translate the light before it is emitted into the converging lens group (2).
6. A microfiber system for an LCD photopolymerization 3D printer according to claim 1 or 2, characterized in that... The LCD screen (1), the converging lens group (2), and the microlens group (3) are relatively fixedly arranged, and a second moving adjustment mechanism is also included to drive the LCD screen (1), the converging lens group (2), and the microlens group (3) to move accordingly to achieve graphic splicing exposure.