Miniaturized ultra-short-focus projection ray machine

Abstract

The utility model discloses a miniaturized ultra-short-focus projection ray machine, which comprises a light source module, a dodging module, a first lens module, a prism module, a light modulator, a second lens module, a reflection bowl and a lens which are sequentially arranged, and a ray machine reflector is arranged between the first lens module and the prism module. And a lens reflector is arranged between the second lens module and the reflection bowl, so that the light source module, the dodging module, the first lens module, the prism module, the light modulator, the second lens module, the reflection bowl and the lens are arranged in three rows. The utility model has the advantages of smaller volume and more convenience.

Description

Technical Field

[0001] This utility model relates to the field of projection optical engine technology, and in particular to a miniaturized ultra-short-throw projection optical engine. Background Technology

[0002] With the continuous development of home entertainment equipment, projectors have become an important part of modern home audio-visual systems. However, traditional projectors are generally bulky and inconvenient to install, which seriously restricts their widespread adoption in home applications. In particular, ultra-short-throw projectors, although they have the advantage of shortening the projection distance, are often cumbersome and have demanding installation requirements.

[0003] Therefore, it is necessary to further improve and perfect the existing technology to overcome these shortcomings, and this utility model is made based on this situation. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a smaller and more convenient miniaturized ultra-short-throw projection optical engine.

[0005] This utility model is achieved through the following technical solution:

[0006] To solve the above-mentioned technical problems, this utility model provides a miniaturized ultra-short-throw projection optical engine, including a light source module, a light homogenizing module, a first lens module, a prism module, a light modulator, a second lens module, a reflector bowl, and a lens arranged in sequence. An optical engine reflector is provided between the first lens module and the prism module, and a lens reflector is provided between the second lens module and the reflector bowl, so that the light source module, the light homogenizing module, the first lens module, the prism module, the light modulator, the second lens module, the reflector bowl, and the lens are arranged in three rows.

[0007] In order to further solve the technical problems to be solved by this utility model, in the miniaturized ultra-short-throw projection optical engine provided by this utility model, the lens reflector and the reflector bowl are both located inside the lens.

[0008] To further address the technical problems to be solved by this utility model, this utility model provides a miniaturized ultra-short-throw projection optical engine in which the light source module includes a laser light source and a light combining module.

[0009] In order to further solve the technical problems to be solved by this utility model, the present utility model provides a miniaturized ultra-short-throw projection optical engine in which the light uniform module includes a diffusion wheel.

[0010] To further address the technical problems to be solved by this utility model, this utility model provides a miniaturized ultra-short-throw projection optical engine in which the prism module includes a TIR prism.

[0011] To further address the technical problems to be solved by this utility model, this utility model provides a miniaturized ultra-short-throw projection optical engine in which the light modulator includes a DLP chip.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] In this invention, the combined use of the optical engine reflector, lens reflector, and reflector bowl allows the light source module, homogenizing module, first lens module, prism module, light modulator, second lens module, reflector bowl, and lens to be arranged in three rows. This ensures both the compactness of the optical system and the efficient transmission of light. This design significantly reduces the size of the projection optical engine, saving space and simplifying the optical path, thereby reducing light scattering and loss during transmission and optimizing light transmission efficiency. Attached Figure Description

[0014] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0015] Figure 1 This is a schematic diagram of the optical path of this utility model. Detailed Implementation

[0016] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] like Figure 1 As shown, an embodiment of the miniaturized ultra-short-throw projection optical engine of this utility model will now be described in detail. The projection optical engine includes a light source module 1, a light homogenizing module 2, a first lens module 3, a prism module 4, a light modulator 5, a second lens module 6, a reflector bowl 7, and a lens arranged in sequence. An optical engine reflector 8 is provided between the first lens module 3 and the prism module 4, and a lens reflector 9 is provided between the second lens module 6 and the reflector bowl 7, thereby arranging the above modules and their components in three rows, significantly reducing the size of the projection optical engine.

[0018] Both the lens reflector 9 and the reflector bowl 7 are located within the lens. A protective window glass is also located in front of the reflector bowl 7.

[0019] The light source module 1 includes a laser light source and a beam combining module. The laser light source preferably uses red, green, and blue lasers; by combining these three lasers, high color saturation light output can be achieved. The beam combining module typically includes several filters used to accurately combine and focus the red, green, and blue laser beams. Through a finely designed optical path and filter arrangement, this beam combining module ensures the overlap accuracy of the three color beams, improving the brightness and color performance of the light source.

[0020] The uniform light module 2 includes a diffuser wheel with micro- and nano-scale surface textures. The diffuser wheel is designed to effectively uniformize the incident light beam, reduce light spot non-uniformity, and adjust the divergence angle of the light source to the ideal illumination angle, ensuring efficient light delivery to the subsequent optical system.

[0021] Prism module 4 includes a TIR (Total Internal Reflection) prism. The TIR prism achieves efficient total internal reflection of light through its specific geometry and reflection principle, guiding the incident beam along a predetermined path to the next optical component, ensuring the compactness and transmission efficiency of the optical path.

[0022] The light modulator 5 includes a DLP (Digital Light Processing) chip. The DLP chip consists of an array of multiple miniature, flip-up mirrors. Each micromirror can be driven by an electrical signal to precisely control the reflection angle of the incident light, thereby achieving high-precision image modulation and display. Through the rapid switching of the DLP chip, the projection optical engine can achieve dynamic display of high-resolution images.

[0023] Both the first lens module 3 and the second lens module 6 include several lenses, preferably using a composite aspherical lens design, which can effectively focus, collimate, and homogenize light. By optimizing the lens curvature and material selection, aberrations are corrected, and the contrast and clarity of the image are improved.

[0024] Of course, there are also some lenses in the optical path, such as several lenses between the optomechanical reflector 8 and the prism module 4.

[0025] The path of light is as follows Figure 1 As shown, the light from the three-color laser source is combined by a beam combiner, processed by a diffuser, and then passes through the first lens module 3 to reach the optomechanical reflector 8. The optomechanical reflector 8 reflects the light, and the reflected light passes through several lenses before entering the TIR prism. The light then enters the DLP chip, is processed by the DLP chip, and then enters the TIR prism again. After passing through the second lens module 6, it reaches the lens reflector 9, which reflects the light into the reflector bowl 7. After reflection by the reflector bowl 7, the light finally passes through the window protective glass and is projected onto the screen.

[0026] The main innovation of this invention lies in the combined use of the optomechanical reflector 8, the lens reflector 9, and the reflector bowl 7 to form a highly efficient optical path reflection device. The optomechanical reflector 8 is located between the first lens module 3 and the prism module 4, used to reflect the optical path back to the prism module 4, optimizing the optical path layout. The lens reflector 9 is located between the second lens module 6 and the reflector bowl 7, used to further reflect the optical path back to the reflector bowl 7, precisely controlling the final projection direction of the light. The reflector bowl 7 adopts an inclined design, and through its shape and reflective characteristics, it evenly projects the adjusted light through the window protective film onto the screen.

[0027] Overall, the combination of the optical engine reflector 8, lens reflector 9, and reflector bowl 7 arranges the light source module 1, homogenizing module 2, first lens module 3, prism module 4, light modulator 5, second lens module 6, reflector bowl 7, and lens in a three-row configuration. This arrangement ensures both the compactness of the optical system and the efficient transmission of light. This three-row layout significantly reduces the size of the projection optical engine. This compact structure not only saves space but also simplifies the optical path, reducing light scattering and loss during transmission and optimizing light transmission efficiency. This design makes the projection optical engine suitable for portable use, home placement, and special applications, greatly enhancing user convenience and comfort.

[0028] It is worth noting that traditional short-throw projector designs often lack an innovative layout for the lens reflector (9), a design flaw that directly leads to a significant increase in lens size. In traditional solutions, lenses typically consist of multiple fixed lenses, requiring substantial installation space and precise axial alignment to achieve light focusing and imaging. Due to the lack of effective reflective optics, these lens assemblies must rely on even more lenses for optical path adjustment and aberration correction, inevitably increasing the overall size.

[0029] In contrast, the innovative design of the lens reflector 9 not only significantly reduces the physical size of the lens but also improves optical performance through a more compact optical path design. This design breakthrough enables projectors to achieve a smaller overall size while maintaining or even improving image quality, opening up new technological pathways for the development of portable and micro-projection devices.

[0030] In summary, the three-row layout of this projection optical engine, the configuration of the reflectors, and the coordinated operation of each optical component optimize the optical design and optical path layout, achieving a balance between miniaturization and high performance, and has broad market application prospects.

Claims

1. A miniaturized ultra-short-throw projection optical engine, characterized in that: The light source module (1), the light homogenizing module (2), the first lens module (3), the prism module (4), the light modulator (5), the second lens module (6), the reflector bowl (7), and the lens are arranged in sequence. An optomechanical reflector (8) is provided between the first lens module (3) and the prism module (4), and a lens reflector (9) is provided between the second lens module (6) and the reflector bowl (7), so that the light source module (1), the light homogenizing module (2), the first lens module (3), the prism module (4), the light modulator (5), the second lens module (6), the reflector bowl (7), and the lens are arranged in three rows.

2. The miniaturized ultra-short-throw projection optical engine according to claim 1, characterized in that: The lens reflector (9) and the reflector bowl (7) are both located inside the lens.

3. The miniaturized ultra-short-throw projection optical engine according to claim 1, characterized in that: The light source module (1) includes a laser light source and a light combining module.

4. A miniaturized ultra-short-throw projection optical engine according to claim 1, characterized in that: The uniform light module (2) includes a diffuser wheel.

5. A miniaturized ultra-short-throw projection optical engine according to claim 1, characterized in that: The prism module (4) includes a TIR prism.

6. A miniaturized ultra-short-throw projection optical engine according to claim 1, characterized in that: The optical modulator (5) includes a DLP chip.

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