LCD projection ray machine based on intelligent mini honeycomb type light source

Abstract

The utility model discloses an LCD projection ray machine based on an intelligent mini honeycomb type light source, which relates to the technical field of 3D printing and comprises a shell, a light source assembly, an image assembly and an imaging lens assembly. The light source assembly and the image assembly are both fixed in the shell, and the imaging lens assembly is fixed on the shell; the light source assembly comprises a honeycomb type lamp panel, a first condensing lens and a second condensing lens. The image assembly comprises an LCD screen and a Fresnel lens. The honeycomb type lamp panel, the first condensing lens, the second condensing lens, the LCD screen and the Fresnel lens are sequentially arranged on a light path of light emitted by the honeycomb type lamp panel. According to the utility model, through the combination of the intelligently controlled light source assembly and the high-precision imaging lens assembly, the projection image distortion phenomenon within one thousandth can be realized, the light intensity distribution is optimized, and the uniformity and the verticality of light spots are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing, and more specifically to an LCD projection optical machine based on an intelligent mini honeycomb light source. Background Art

[0002] In recent years, with the development of 3D printing technology, stereolithography 3D printing has been widely used in industrial manufacturing, medical, military, aerospace, education and other fields due to its high precision and high efficiency. Among them, LCD (Liquid Crystal Display) technology has gradually become an important light source solution in the field of stereolithography 3D printing due to its continuous improvement in cost-effectiveness and resolution.

[0003] However, traditional LCD projection optical machines have some inherent disadvantages, which are mainly manifested in the following aspects: low light source efficiency: due to the low transmittance of the LCD screen, most of the light energy is absorbed or reflected, resulting in energy waste and possibly shortening the service life of the LCD screen due to overheating; resolution limitation: although LCD technology is constantly improving, in some high-precision applications, its light intensity and uniformity are still inferior to DLP technology.

[0004] Therefore, how to improve the light source efficiency, achieve high light intensity, high uniformity and high-resolution printing quality is an urgent problem to be solved by those skilled in the art. Summary of the Utility Model

[0005] In view of this, the utility model provides an LCD projection optical machine based on an intelligent mini honeycomb light source, which overcomes the above defects.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] An LCD projection optical machine based on an intelligent mini honeycomb light source, comprising a housing, a light source assembly, an image assembly and an imaging lens assembly; the light source assembly and the image assembly are both fixed in the housing, and the imaging lens assembly is fixed on the housing; wherein, the light source assembly includes a honeycomb lamp board, a first condenser lens and a second condenser lens; the image assembly includes an LCD screen and a Fresnel lens; the honeycomb lamp board, the first condenser lens, the second condenser lens, the LCD screen and the Fresnel lens are arranged in sequence on the optical path of the light emitted by the honeycomb lamp board.

[0008] Optionally, the housing includes a main housing, a base and a lens barrel fixing seat, and the base and the lens barrel fixing seat are fixed on both sides of the main housing.

[0009] Optionally, the honeycomb lamp board includes lamp beads and a substrate, and a plurality of the lamp beads are fixed on the substrate in a matrix honeycomb manner.

[0010] Optionally, it further includes a heat dissipation component, which includes a first radiator and a second radiator. The first radiator is disposed between the base and the honeycomb lamp panel; the second radiator is fixed to the side of the housing.

[0011] Optionally, a dust-proof cover is further provided on one side of the second radiator.

[0012] Optionally, the imaging lens assembly includes a first lens group, a second lens group and a lens barrel. The first lens group and the second lens group are both fixed in the lens barrel, and the lens barrel is fixed to the housing.

[0013] Optionally, both the first lens group and the second lens group are lens groups composed of a preset number of lenses; wherein, the preset number is determined according to project requirements.

[0014] Optionally, it further includes a printing and forming platform, which is disposed opposite to the imaging lens assembly to form a working focal length.

[0015] Through the above technical solutions, the present utility model discloses an LCD projection optical machine based on an intelligent mini honeycomb light source. Compared with the prior art, it has the following beneficial effects:

[0016] 1. Energy conservation and environmental protection: By adopting a honeycomb structure arrangement of mini 2mil - 35mil specification UV ultraviolet LEDs (365 - 405nm) lamp panels, intelligent area control and point control are realized through the design of the circuit and the control board, so that the projection optical machine can achieve intelligent and precise exposure control, avoiding the energy waste caused by the full-board large-area light source exposure in the original industry, reducing the overall energy consumption, reducing the heat accumulation phenomenon, and thus achieving the goal of energy conservation and environmental protection; improving the light source utilization efficiency: The intelligent exposure control technology not only reduces the energy waste caused by the low light source transmittance, but also enables the light source to be utilized more efficiently, improving the overall utilization efficiency of the light source;

[0017] 2. Extending the equipment life: By reducing the unnecessary light source turning-on time and intensity, the risk of damage to the light source and the LCD screen due to overheating is effectively reduced, thereby extending the service life of the entire system;

[0018] 3. Improving the imaging quality: The combination of the mini honeycomb lamp panel and the intelligent control system optimizes the light intensity distribution, improves the uniformity and perpendicularity of the light spot, thereby achieving a higher contrast ratio, and can realize the projection image distortion phenomenon within one-thousandth, significantly improving the imaging quality;

[0019] 4. Applicable to Stereolithography 3D Printing: The projection optical machine of the present utility model is applicable to the field of stereolithography 3D printing. Its high precision and good detail performance can meet the requirements of the industry for high-quality printed parts and are applicable to a variety of application scenarios;

[0020] 5. Promote Industry Development: The application of this technology not only improves the technical level of existing equipment but also brings new possibilities and development space to the stereolithography 3D printing industry, promoting the progress and technological upgrading of related industries. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the provided drawings.

[0022] Figure 1 It is a schematic diagram of the overall structure provided by the present utility model;

[0023] Figure 2 It is a schematic diagram of the split structure provided by the present utility model;

[0024] Figure 3 It is a schematic diagram of the housing structure provided by the present utility model;

[0025] Figure 4 It is a schematic diagram of the distortion data provided by the present utility model;

[0026] Figure 5 It is a schematic diagram of the comparison between distortion and clarity provided by the present utility model;

[0027] In the figure, 1 is the housing, 11 is the main housing, 12 is the base, and 13 is the lens barrel fixing seat; 2 is the light source assembly, 21 is the honeycomb lamp panel, 22 is the first condenser lens, 23 is the lens holder, and 24 is the second condenser lens; 3 is the image assembly, 31 is the LCD screen, 32 is the Fresnel lens, and 33 is the Fresnel lens fixing plate; 4 is the imaging lens assembly, 41 is the first lens group, 42 is the second lens group, and 43 is the lens barrel; 5 is the printing and forming platform; 61 is the first radiator, 62 is the second radiator, and 63 is the fan dust cover. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0029] An embodiment of the present invention discloses an LCD projection optical machine based on an intelligent miniaturized cellular light source. As Figure 1 and Figure 2 shown, it includes a housing 1, a light source assembly 2, an image assembly 3, and an imaging lens assembly 4. The light source assembly 2 and the image assembly 3 are both fixed inside the housing 1, and the imaging lens assembly 4 is fixed on the housing 1. Among them, the light source assembly 2 includes a cellular lamp board 21, a first condenser lens 22, and a second condenser lens 24; the image assembly 3 includes an LCD screen 31 and a Fresnel lens 32; the cellular lamp board 21, the first condenser lens 22, the second condenser lens 24, the LCD screen 31, and the Fresnel lens 32 are arranged in sequence on the optical path of the light emitted by the cellular lamp board 21.

[0030] Further, in this embodiment, the first condenser lens 22 is a small condenser lens, and the second condenser lens 24 is a large condenser lens. The first condenser lens 22 and the second condenser lens 24 are both fixed on the lens bracket 23; the first condenser lens 22 is located on one side of the cellular lamp board 21 and is used to converge the scattered light, reduce light loss and improve the light concentration; after the light converged by the first condenser lens 22 is refocused by the second condenser lens 24, it is transmitted to the LCD screen 31 of the image assembly 3, and the light transmitted by the LCD screen 31 enters the imaging lens assembly 4 through the Fresnel lens 32.

[0031] In one embodiment, as Figure 3 shown, the housing 1 includes a main housing 11, a base 12, and a lens barrel fixing seat 13. The base 12 and the lens barrel fixing seat 13 are installed on both sides of the main housing 11.

[0032] Further, the main housing 11, the base 12, and the lens barrel fixing seat 13 form a complete light-shielding cover, which surrounds the light source assembly 2 and the image assembly 3, preventing interference from external ambient light and protecting them from damage at the same time.

[0033] In one embodiment, the cellular lamp board 21 includes a substrate and lamp beads, and a plurality of lamp beads are fixedly arranged on the substrate in a matrix cellular manner.

[0034] Further, the honeycomb lamp panel 21 is a UV ultraviolet LED (365 - 405 nm) lamp panel with a mini 2 mil - 35 mil specification. On it, the lamp beads adopt UV ultraviolet LED lamp beads, and each lamp bead is an independent light source, controlled by an independent light source controller to control the on / off and luminous intensity of each lamp bead. Any range of lamp beads can also be uniformly controlled as needed to form area control. In this embodiment, the use of UV ultraviolet LED lamp beads enables the projector to respond within a short time and adapt to rapidly changing projection content; using individually controllable and locally controllable UV ultraviolet lamp beads as the light source not only realizes intelligent and precise exposure control, greatly reduces the energy waste caused by low light source transmittance, improves the use efficiency of the light source, realizes energy conservation and environmental protection, but also extends the service life of the lamp beads and the LCD screen 31.

[0035] In one embodiment, a heat dissipation component is further included. The heat dissipation component includes a first radiator 61 and a second radiator 62. The first radiator 61 is disposed between the base 12 and the honeycomb lamp panel 21; the second radiator 62 is fixed to the side of the housing 1.

[0036] Further, in this embodiment, the first radiator 61 is a heat dissipation plate, which is attached to the honeycomb lamp panel 21 to dissipate heat from the honeycomb lamp panel 21 and maintain the operating temperature of the honeycomb lamp panel 21 within a safe range; the second radiator 62 is a cooling fan, respectively disposed on both sides of the main housing 11 to cool the inside of the main housing 11; through double cooling, the operating temperature of the device is effectively controlled, the risk of hardware damage caused by overheating is reduced, and the service life of the device is extended.

[0037] In one embodiment, a dust-proof cover is further fixed to one side of the second radiator 62.

[0038] Further, a fan dust-proof cover 63 is disposed outside the second radiator 62 to prevent dust from entering the fan and affecting its working performance.

[0039] In one embodiment, the imaging lens assembly 4 includes a first lens group 41, a second lens group 42, and a lens barrel 43. The first lens group 41 and the second lens group 42 are both fixed inside the lens barrel 43, and the lens barrel 43 is fixed to the housing 1.

[0040] Further, the lens barrel 43 is fixed to the housing 1 through a lens barrel fixing seat 13.

[0041] In one embodiment, both the first lens group 41 and the second lens group 42 are lens groups composed of a preset number of lenses, where the preset number is set according to project requirements.

[0042] Further, the lens barrel 43 is a focus-adjustable lens barrel 43. By adjusting the position of the lens barrel 43, that is, changing the distance between the first lens group 41 and the second lens group 42, the focal length of the lens can be changed, so as to achieve focusing on objects at different distances.

[0043] Furthermore, after receiving the light beam transmitted by the Fresnel lens 32, the first lens group 41 performs preliminary focusing on the light beam. After the second lens group 42 performs advanced correction on the preliminarily focused light beam, it is projected onto the printing and forming platform 5.

[0044] In one embodiment, it further includes a printing and forming platform 5, and the printing and forming platform 5 is disposed opposite to the imaging lens assembly 4.

[0045] Further, an image is generated by the intelligent control mini honeycomb light source passing through the LCD screen, focused on the imaging optical system and the high-precision lens assembly, and then projected onto the corresponding printing and forming platform to print and cure the layer. In this embodiment, through the perfect combination of high-precision illumination optics and imaging optics, the projection image distortion phenomenon within one-thousandth and high contrast can be achieved, as Figure 4 and Figure 5 shown, so as to realize the LCD projection optical machine.

[0046] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method part.

[0047] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can 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 these embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An LCD projection optical machine based on an intelligent mini honeycomb light source, comprising a housing (1), a light source assembly (2), an image assembly (3) and an imaging lens assembly (4); the light source assembly (2) and the image assembly (3) are both fixed in the housing (1), and the imaging lens assembly (4) is fixed on the housing (1), characterized in that: The light source assembly (2) comprises a honeycomb light panel (21), a first condensing lens (22) and a second condensing lens (24); the image assembly (3) comprises an LCD screen (31) and a Fresnel lens (32); the honeycomb light panel (21), the first condensing lens (22), the second condensing lens (24), the LCD screen (31) and the Fresnel lens (32) are sequentially arranged on the optical path of the light emitted by the honeycomb light panel (21).

2. The LCD projection optical machine based on the intelligent mini honeycomb light source according to claim 1, characterized in that: The housing (1) comprises a main housing (11), a base (12) and a lens barrel fixing seat (13); the base (12) and the lens barrel fixing seat (13) are fixed on both sides of the main housing (11).

3. The LCD projection optical machine based on the intelligent mini honeycomb light source according to claim 1, characterized in that: The honeycomb-type lamp panel (21) comprises lamp beads and a base plate, and a plurality of the lamp beads are fixed on the base plate in a matrix honeycomb pattern.

4. The LCD projection optical machine based on the intelligent mini honeycomb light source according to claim 2, characterized in that: It also includes a heat dissipation component, which includes a first heat sink (61) and a second heat sink (62); the first heat sink (61) is arranged between the base (12) and the honeycomb light panel (21); and the second heat sink (62) is fixed to the side of the shell (1).

5. The LCD projection optical machine based on the intelligent mini honeycomb light source according to claim 4, characterized in that: A dust cover is also provided on one side of the second radiator (62).

6. The LCD projection optical machine based on the intelligent mini honeycomb light source according to claim 1, characterized in that: The imaging lens assembly (4) comprises a first lens group (41), a second lens group (42) and a lens barrel (43); the first lens group (41) and the second lens group (42) are both fixed in the lens barrel (43); and the lens barrel (43) is fixed on the housing (1).

7. The LCD projection optical machine based on the intelligent mini honeycomb light source according to claim 6, characterized in that: The first lens group (41) and the second lens group (42) are both lens groups composed of a preset number of lenses.

8. The LCD projection optical machine based on the intelligent mini honeycomb light source according to claim 1, characterized in that: It also comprises a printing and forming platform (5), wherein the printing and forming platform (5) is arranged opposite to the imaging lens assembly (4).

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