LCD projection ray machine

Abstract

The utility model discloses an LCD projection ray machine which comprises a shell, a light source assembly, a focusing imaging assembly, a lens and a printing forming platform. The light source assembly is connected with the shell and comprises a COB light source, and light emitted by the COB light source irradiates into the shell; the focusing imaging assembly is arranged in the shell; light emitted by the light source assembly is received; the focusing imaging assembly comprises a first Fresnel lens, an LCD screen and a second Fresnel lens. The first Fresnel lens, the LCD screen and the second Fresnel lens are sequentially arranged in a stacked mode. Light emitted by the light source assembly sequentially penetrates through the first Fresnel lens, the LCD screen and the second Fresnel lens. The lens is connected with the shell and receives light transmitted by the Fresnel lens II; the printing forming platform is located below the lens and right faces the light emitting end of the lens. The projection light machine is good in heat dissipation effect, and light with different wavelengths can be subjected to light curing printing at the same time.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing, and more specifically to an LCD projection optical machine. Background Art

[0002] A mainstream branch of 3D printing technology is photocuring 3D printing technology, which uses the principle of ultraviolet light beam irradiating liquid photosensitive resin to cause photopolymerization reaction and then solidification, so that the material is formed point by point or layer by layer. LCD type 3D printer uses LCD liquid crystal screen imaging and LCD light source. The computer program provides image signals, and selective transparent areas appear on the LCD. The LCD light source irradiates the photosensitive resin in the resin tank through the transparent area, so that it solidifies layer by layer.

[0003] At present, the transmittance of the LCD screen used is low, which will lead to heat accumulation of the LCD screen, shortened service life, and low light intensity illumination. At the same time, the light source received by the LCD screen is basically a light source of the same wavelength, and the light source of the same wavelength can only cure the same photosensitive material, resulting in greater limitations of light-curing printing.

[0004] Therefore, it is an urgent problem for those skilled in the art to develop an LCD projection optical machine with good heat dissipation effect and capable of realizing light-curing printing with different wavelengths at the same time. Summary of the invention

[0005] In view of this, the present invention provides an LCD projection optical machine with good heat dissipation effect and capable of realizing light-curing printing with lights of different wavelengths at the same time.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] An LCD projection optical machine, comprising:

[0008] case,

[0009] A light source assembly, the light source assembly is connected to the housing, the light source assembly includes a COB light source, and the light emitted by the COB light source is irradiated into the housing;

[0010] A focusing imaging component, which is arranged inside the housing and receives the light emitted by the light source component. The focusing imaging component comprises: a Fresnel lens 1, an LCD screen and a Fresnel lens 2. The Fresnel lens 1, the LCD screen and the Fresnel lens 2 are sequentially stacked and arranged. The light emitted by the light source component sequentially passes through the Fresnel lens 1, the LCD screen and the Fresnel lens 2.

[0011] A lens, the lens is connected to the housing and receives light transmitted by the second Fresnel lens;

[0012] A printing and forming platform is located below the lens and directly faces the light emitting end of the lens.

[0013] The beneficial effect of adopting the above technical solution is that the COB light source in the present invention can emit light of different wavelengths, and the corresponding photosensitive materials can be cured by light of different wavelengths, so that the printing range is wider and ultra-high precision curing printing can be achieved.

[0014] Preferably, a reflector is obliquely arranged inside the housing, and the light emitted by the light source assembly is refracted to the Fresnel lens 1 through the reflector. The arrangement of the reflector can reduce the volume of the housing.

[0015] Preferably, the light source assembly includes: a light source substrate, a focusing lens, and a cooling block; the cooling block, the light source substrate, and the focusing lens are arranged in sequence from the outside to the inside of the housing; the light source substrate and the focusing lens are both connected to the cooling block. The cooling block can cool the light source substrate, and when a high-power COB light source is used, the normal operation of the integrated LED light source can be guaranteed.

[0016] Preferably, the COB light source is integrated on a side of the light source substrate close to the focusing lens. An integrated COB light source is to design LED light-emitting chips of different wavelengths on the light source substrate to emit light of different wavelengths at the same time.

[0017] Preferably, a lens holder is provided outside the condenser lens, and the lens holder is connected to the cooling block; a lens pressing plate is provided on the side of the condenser lens away from the lens holder, and the lens pressing plate is connected to the lens holder, and the condenser lens is pressed tightly between the lens pressing plate and the lens holder. The lens holder and the lens pressing plate facilitate the installation of the condenser lens.

[0018] Preferably, the focusing imaging assembly further comprises a mounting frame and an LCD screen protection frame; the LCD screen protection frame is arranged outside the LCD screen; the Fresnel lens 1, the LCD screen, and the Fresnel lens 2 are all arranged in the mounting frame, and the Fresnel lens 1, the LCD screen protection frame, and the Fresnel lens 2 are all connected to the mounting frame. The mounting frame can stack and fix the Fresnel lens 1, the LCD screen, and the Fresnel lens 2 together, and is convenient for installation and replacement.

[0019] Preferably, a disassembly opening is provided at a position of the housing side wall corresponding to the focusing imaging component, and the focusing imaging component is placed inside the housing through the disassembly opening. The provision of the disassembly opening facilitates disassembly and assembly of the focusing imaging component.

[0020] Preferably, a cooling fan is provided at a position of the side wall of the housing corresponding to the focusing imaging assembly. The cooling fan can cool the LCD screen, solving the problem of heat accumulation caused by the low light transmittance of the LCD screen.

[0021] Preferably, the lens comprises: an adjustable focus lens barrel and a lens group; the lens group is arranged inside the adjustable focus lens barrel, and the lens group is composed of a plurality of lenses. The adjustable focus lens barrel can fine-tune the focal length, so that the imaging spot is clearer and more accurate.

[0022] Preferably, one end of the adjustable focus lens barrel connected to the housing is provided with a lens barrel fixing plate, and the lens barrel fixing plate is connected to the housing. The lens barrel fixing plate facilitates the connection between the adjustable focus lens barrel and the housing.

[0023] It can be seen from the above technical solutions that, compared with the prior art, the present invention discloses an LCD projection optical machine, which has the following beneficial effects:

[0024] (1) In the present invention, by integrating a COB light source on a light source substrate, light of different wavelengths can be emitted simultaneously to cure the corresponding photosensitive materials, thereby solving the problem that light-curing 3D printing cannot perform color printing;

[0025] (2) By cooling the light source substrate with a cooling block, a COB light source with a relatively high power can be integrated on the light source substrate; the cooling fan can dissipate heat and cool the LCD screen, solving the problem of heat accumulation on the LCD screen;

[0026] (3) The present invention combines the illumination optical system with the imaging optical system to obtain a light spot with high resolution, high uniformity, high precision and high verticality. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0028] Figure 1 An exploded diagram of the structure of the projection optical machine provided by the present invention;

[0029] Figure 2 A schematic diagram of the structure of the projection optical machine provided by the present invention;

[0030] Figure 3 A schematic diagram of the structure of the housing provided by the present invention;

[0031] Figure 4This is a structural schematic diagram of the connection between the light source substrate and the temperature-reducing cooling block provided by the present invention.

[0032] Among them, in the figure,

[0033] 1- housing;

[0034] 11-disassembly and assembly port;

[0035] 2- Light source assembly;

[0036] 21-COB light source; 22-light source substrate; 23-condensing lens; 24-cooling block; 25-lens bracket; 26-lens pressure plate;

[0037] 3- Focus imaging component;

[0038] 31-Fresnel lens 1; 32-LCD screen; 33-Fresnel lens 2; 34-installation frame; 35-LCD screen protection frame;

[0039] 4- Lens;

[0040] 41-adjustable focal length lens barrel; 42-lens group;

[0041] 5-printing platform; 6-reflector; 7-cooling fan; 8-lens barrel fixing plate. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] like Figure 1-4 As shown, the embodiment of the present invention discloses an LCD projection optical machine, including:

[0044] Shell 1,

[0045] A light source assembly 2, which is connected to the housing 1, and includes a COB light source 21, and light emitted by the COB light source 21 is irradiated into the housing 1;

[0046] The focusing imaging component 3 is arranged inside the housing 1 and receives the light emitted by the light source component 2. The focusing imaging component 3 includes: a Fresnel lens 1 31, an LCD screen 32 and a Fresnel lens 2 33. The Fresnel lens 1 31, the LCD screen 32 and the Fresnel lens 2 33 are sequentially stacked and arranged. The light emitted by the light source component 2 sequentially passes through the Fresnel lens 1 31, the LCD screen 32 and the Fresnel lens 2 33.

[0047] Lens 4, which is connected to the housing 1 and receives light transmitted by the Fresnel lens 2 33;

[0048] The printing and molding platform 5 is located below the lens 4 and is directly opposite to the light emitting end of the lens 4. The Fresnel lens 1 31 focuses the light reflected by the reflector 6 onto the LCD screen, and the Fresnel lens 2 33 can focus the light transmitted from the LCD screen and evenly focus the light onto the lens group 42.

[0049] In order to further optimize the above technical solution, a reflector 6 is obliquely arranged inside the housing 1, and the light emitted by the light source assembly 2 is refracted to the Fresnel lens 31 through the reflector 6. The reflector 6 can achieve high uniform reflection of light.

[0050] In order to further optimize the above technical solution, the light source assembly 2 includes: a light source substrate 22, a focusing lens 23 and a cooling block 24; the cooling block 24, the light source substrate 22 and the focusing lens 23 are arranged in sequence from the outside to the inside of the housing 1; the light source substrate 22 and the focusing lens 23 are both connected to the cooling block 24. The focusing lens 23 can focus light and make the light evenly distributed; the cooling block 24 uses a liquid cooling water block.

[0051] In order to further optimize the above technical solution, a COB light source 21 is integrated on one side of the light source substrate 22 close to the focusing lens 23. The light source substrate 22 is an LED copper substrate, and light sources of different wavelengths can be integrated on the same LED copper substrate.

[0052] In order to further optimize the above technical solution, a lens holder 25 is provided on the outside of the focusing lens 23, and the lens holder 25 is connected to the cooling block 24; a lens pressing plate 26 is provided on the side of the focusing lens 23 away from the lens holder 25, and the lens pressing plate 26 is connected to the lens holder 25, and the focusing lens 23 is pressed tightly between the lens pressing plate 26 and the lens holder 25.

[0053] In order to further optimize the above technical solution, the focusing imaging component 3 also includes a mounting frame 34 and an LCD screen protection frame 35; the LCD screen protection frame 35 is arranged on the outside of the LCD screen 32; the Fresnel lens 1 31, the LCD screen 32, and the Fresnel lens 2 33 are all arranged in the mounting frame 34, and the Fresnel lens 1 31, the LCD screen protection frame 35, and the Fresnel lens 2 33 are all connected to the mounting frame 34.

[0054] In order to further optimize the above technical solution, a disassembly opening 11 is opened at a position of the side wall of the shell 1 corresponding to the focusing imaging component 3 , and the focusing imaging component 3 is placed inside the shell 1 through the disassembly opening 11 .

[0055] In order to further optimize the above technical solution, a cooling fan 7 is provided at a position of the side wall of the housing 1 corresponding to the focusing imaging component 3 .

[0056] In order to further optimize the above technical solution, the lens 4 includes: an adjustable focal length lens barrel 41 and a lens group 42; the lens group 42 is arranged inside the adjustable focal length lens barrel 41, and the lens group 42 is composed of a plurality of lenses.

[0057] In order to further optimize the above technical solution, a lens barrel fixing plate 8 is provided at one end of the adjustable focal length lens barrel 41 connected to the housing 1 , and the lens barrel fixing plate 8 is connected to the housing 1 .

[0058] In order to further optimize the above technical solution, the light source assembly 2, the reflector 6 and the Fresnel lens 31 constitute the illumination optical system, and the Fresnel lens 2 and the lens constitute the imaging optical system. The high-precision combination of the two can achieve high-precision imaging light spots and high-precision curing printing. In addition, the large floating surface curing light spot can be magnified 1 to 5 times through optical technology to meet the needs of large-size light-curing 3D printers; at the same time, the optical technology can be used to reduce the size by 1 to 50 times to achieve ultra-high power light intensity and ultra-high resolution light spots.

[0059] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0060] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An LCD projection optical machine, characterized in that: include: Housing (1), A light source assembly (2), the light source assembly (2) being connected to the housing (1), the light source assembly (2) comprising a COB light source (21), the light emitted by the COB light source (21) irradiating the housing (1); A focusing imaging component (3), the focusing imaging component (3) being arranged inside the housing (1) and receiving the light emitted by the light source component (2); the focusing imaging component (3) comprising: a first Fresnel lens (31), an LCD screen (32) and a second Fresnel lens (33); the first Fresnel lens (31), the LCD screen (32) and the second Fresnel lens (33) being arranged in a stacked manner in sequence; the light emitted by the light source component (2) passes through the first Fresnel lens (31), the LCD screen (32) and the second Fresnel lens (33) in sequence; A lens (4), the lens (4) being connected to the housing (1) and receiving light transmitted by the second Fresnel lens (33); A printing and forming platform (5), wherein the printing and forming platform (5) is located below the lens (4) and directly faces the light emitting end of the lens (4).

2. The LCD projection optical machine according to claim 1, characterized in that: A reflector (6) is obliquely arranged inside the housing (1), and the light emitted by the light source assembly (2) is refracted by the reflector (6) to the Fresnel lens 1 (31).

3. The LCD projection optical machine according to claim 1, characterized in that: The light source assembly (2) comprises: a light source substrate (22), a focusing lens (23) and a cooling block (24); the cooling block (24), the light source substrate (22) and the focusing lens (23) are arranged in sequence from the outside to the inside of the housing (1); and the light source substrate (22) and the focusing lens (23) are both connected to the cooling block (24).

4. The LCD projection optical machine according to claim 3, characterized in that: The COB light source (21) is integrated on a side of the light source substrate (22) close to the condenser lens (23).

5. The LCD projection optical machine according to claim 3 or 4, characterized in that: A lens holder (25) is arranged outside the focusing lens (23), and the lens holder (25) is connected to the cooling block (24); a lens pressing plate (26) is arranged on the side of the focusing lens (23) away from the lens holder (25), and the lens pressing plate (26) is connected to the lens holder (25) and presses the focusing lens (23) between the lens pressing plate (26) and the lens holder (25).

6. The LCD projection optical machine according to claim 1, characterized in that: The focusing imaging assembly (3) further comprises a mounting frame (34) and an LCD screen protection frame (35); the LCD screen protection frame (35) is arranged outside the LCD screen (32); the Fresnel lens 1 (31), the LCD screen (32), and the Fresnel lens 2 (33) are all arranged in the mounting frame (34), and the Fresnel lens 1 (31), the LCD screen protection frame (35), and the Fresnel lens 2 (33) are all connected to the mounting frame (34).

7. The LCD projection optical machine according to claim 6, characterized in that: A disassembly opening (11) is provided at a position of the side wall of the shell (1) corresponding to the focusing imaging component (3); the focusing imaging component (3) passes through the disassembly opening (11) and is placed inside the shell (1).

8. The LCD projection optical machine according to claim 7, characterized in that: A heat dissipation fan (7) is provided at a position on the side wall of the housing (1) corresponding to the focusing imaging assembly (3).

9. The LCD projection optical machine according to claim 1, characterized in that: The lens (4) comprises: an adjustable focus lens barrel (41) and a lens group (42); the lens group (42) is arranged inside the adjustable focus lens barrel (41), and the lens group (42) is composed of a plurality of lenses.

10. The LCD projection optical machine according to claim 9, characterized in that: One end of the adjustable focal length lens barrel (41) connected to the housing (1) is provided with a lens barrel fixing plate (8), and the lens barrel fixing plate (8) is connected to the housing (1).

Images