Projection device for watch

Abstract

The invention provides a projection device for a watch, and the device comprises a light transmitting module which is used for providing light needed by projection; the light preprocessing module is used for preprocessing the light, preliminarily differentiating and guiding the light according to colors and adjusting the propagation directions of the light with different colors; the color separation module is used for separating the light according to colors; the light uniformizing module is used for uniformizing the light; the guiding and correcting module is used for guiding light and correcting the image; the image generation module is used for controlling a reflector to generate an image according to the image signal; and the projection and adjustment module is used for focusing light and adjusting and projecting an image. According to the invention, the technical problem that the quality of a projection image projected by a projection device in a traditional wearable device is low is solved.

Description

Technical Field

[0001] The invention relates to the field of holographic projection, and more specifically to a projection device for watches. Background Art

[0002] With the continuous development of science and technology, the functions of wearable devices are becoming increasingly rich and diverse. In modern life, people's demand for portability and versatility is growing, especially in information display and sharing. As a technology that can project images or videos onto the outside, projection technology has broad application prospects. However, traditional projection equipment is usually large in size and high in power consumption, which makes it difficult to meet the requirements of wearable devices for small, light and low power consumption. In addition, the quality of the projected image is also a key issue, including brightness uniformity, color accuracy, clarity and other aspects. Therefore, how to achieve high-quality projection effects in the limited space of wearable devices while ensuring the stability and reliability of the equipment is an urgent problem to be solved in the current technical field. Summary of the invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and provide a projection device for a watch, which aims to solve the technical problem of low image quality projected by the projection device in a traditional wearable device.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A projection device for a watch, comprising:

[0006] A light emitting module, used to provide light required for projection;

[0007] A light preprocessing module is used to preprocess the light, initially guide the light by color and adjust the propagation direction of light of different colors;

[0008] A color separation module, used to separate light by color;

[0009] Light uniformity module, used to uniformly process the light;

[0010] A guide correction module for guiding light and correcting images;

[0011] An image generation module, used for controlling the reflector to generate an image according to the image signal;

[0012] The projection and adjustment module is used to focus light, adjust and project images.

[0013] In one embodiment, the light preprocessing module includes a color filter component and a straight lens, the color filter component includes a red array, a green array and a red array, which are used to preliminarily separate red light, green light and blue light, and the straight lens is used to focus and adjust the direction of the light that has been preliminarily color-guided so that the preprocessed light enters the color separation module.

[0014] In one embodiment, the color separation module is connected to the output end of the light preprocessing module, and the color separation module includes a dichroic filter for separating the preprocessed light into different colors and then guiding them into the light uniformization module.

[0015] In one embodiment, the two-color filter includes a first filter and a second filter, the second filter is arranged parallel to the first filter, and the top surface level of the second filter is lower than the top surface level of the first filter.

[0016] In one embodiment, the light uniformity module is connected to the output end of the color separation module, and the light uniformity module includes an optical integrator, which is used to receive the light emitted by the color separation module and perform uniform processing on the light.

[0017] In one embodiment, the optical integrator includes a focusing element, an optical cavity and a guiding element, and the focusing element, the optical cavity and the guiding element are arranged in sequence, the focusing element is used to gather the light emitted by the color separation module and guide it into the optical cavity, the optical cavity is used to propagate and mix the light, and the guiding element is used to receive the light emitted by the optical cavity and guide the light into the guidance correction module.

[0018] In one embodiment, a scattering element and a reflecting element are provided in the optical cavity, the scattering element is used to scatter the light entering the optical cavity, and the reflecting element is used to reflect the light entering the optical cavity.

[0019] In one embodiment, the input end of the guidance correction module is connected to the output end of the light uniformity module, the guidance correction module is a shooting prism assembly, the image generation module is connected to the first output end of the shooting prism assembly, and the projection and adjustment module is connected to the second output end of the shooting prism assembly.

[0020] In one embodiment, the image generation module includes a digital micromirror device, in which a plurality of micro-mirror arrays and a micromirror control circuit are provided to adjust the reflection direction of light and generate an image.

[0021] In one embodiment, the projection and adjustment module includes a projection lens group for receiving the image generated by the digital micromirror device, and the projection lens group includes a plurality of optical lenses for adjusting light and projecting images.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) By utilizing miniaturized optical elements such as optical integrators, light uniformity processing is achieved in a limited space, reducing the reliance on large optical components. Components such as digital micromirror devices, shooting prisms, and projection lenses are arranged compactly to fully utilize the internal space of the wearable device. (2) Through the application of optical integrators, the problem of brightness uniformity is solved, making the brightness of the projected image more uniform and the colors more saturated. By utilizing a two-color filter and a digital micromirror device, color accuracy is improved, ensuring that the colors of the projected image are more vivid and realistic. The design of the shooting prism effectively solves the problem of optical path stability, can accurately direct light to the projection lens, and to a certain extent correct optical path deviations caused by the shaking of the watch, etc., to ensure the stability and clarity of the projected image.

[0023] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic structural diagram of a projection device for a watch provided by the present invention;

[0025] Figure 2 A schematic diagram of a module of a projection device for a watch provided by the present invention.

[0026] Reference numerals

[0027] 1. Light emission module; 2. Light preprocessing module; 21. Color filter component; 211. Blue array; 212. Green array; 213. Red array; 22. Straight lens; 3. Color separation module; 31. Two-color filter; 311. First filter; 312. Second filter; 4. Light uniformity module; 41. Optical integrator; 411. Focusing element; 412. Optical cavity; 413. Guiding element; 5. Guiding correction module; 6. Image generation module; 61. Digital micromirror device; 7. Projection and adjustment module; 71. Projection lens group. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0029] 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 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.

[0030] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0031] It should also be understood that the terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0032] It should be further understood that the term "and / or" used in the present description and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0033] See also Figure 1 to Figure 2 As shown, the present invention discloses a projection device for a watch, comprising: a light emitting module 1, used for providing light required for projection; a light preprocessing module 2, used for preprocessing the light, preliminarily guiding the light according to color differentiation and adjusting the propagation direction of light of different colors; a color separation module 3, used for separating the light according to color; a light uniformization module 4, used for uniformizing the light; a guide correction module 5, used for guiding the light and correcting the image; an image generation module 6, used for controlling the reflector to generate an image according to an image signal; and a projection and adjustment module 7, used for focusing the light, adjusting and projecting the image.

[0034] Specifically, in this embodiment, light is emitted from the light emitting device, passes through the light preprocessing module 2, the color separation module 3, the light uniformity module 4, and the guide correction module 5 in sequence, and then enters the image generation module 6 to generate an image, and finally adjusts the image and completes the projection through the projection and adjustment module 7. By integrating the projection device in this embodiment into the watch, the various modules work together and optimize the design, and the user can project the screen and image in the watch with high quality anytime and anywhere without carrying the traditional bulky projection equipment, which greatly improves the portability of the projection.

[0035] It can be understood that the light preprocessing module 2 preliminarily guides and adjusts the propagation direction of the light according to color differentiation, providing more accurate light input for subsequent color separation and image generation, so as to improve the color accuracy and saturation of the subsequently generated image, and make the projected image more vivid and realistic. The color separation module 3 can accurately separate the light by color to ensure that the light of different colors can accurately reach the image generation module 6, thereby improving the color reproduction of the image. The light uniformity module 4 performs uniform processing on the light, eliminates the unevenness of the light, makes the projected image more uniform in brightness and color, avoids the problems of uneven brightness or color spots, and improves the overall quality of the image. The guidance correction module 5 can not only guide the light to accurately reach the image generation module 6 and the projection and adjustment module 7, but also correct the image, correct the image deformation, distortion and other problems caused by optical path deviation, etc., to ensure that the projected image is clear and accurate. The light emission module 1 provides a stable light output, the light preprocessing module 2 and the color separation module 3 ensure the accurate processing and transmission of the light, and the image generation module 6 and the projection and adjustment module 7 efficiently generate and project images.

[0036] In one embodiment, the light preprocessing module 2 includes a color filter component 21 and a straight lens 22, the color filter component 21 includes a red array 213, a green array 212 and a red array 213, which are used to preliminarily separate red light, green light and blue light, and the straight lens 22 is used to focus and adjust the direction of the light that has been preliminarily color-guided so that the preprocessed light enters the color separation module 3.

[0037] Specifically, the red array 213, green array 212 and blue array 211 in the color filter component 21 make the red light, green light and blue light be preliminarily separated before entering the color separation module 3, thereby improving the accuracy and efficiency of subsequent color separation, and improving the color restoration when the image is projected. At the same time, the straight lens 22 focuses and adjusts the direction of the light guided by the preliminary color, ensuring that the light stably enters the color separation module 3, thereby improving the utilization efficiency of the light, reducing the loss of light during the propagation process, and making the optical path of the entire projection system more stable and reliable. When projecting, through the light preprocessing module 2, whether in a strong light environment or a dark light environment, the light can be effectively preprocessed through the synergistic effect of the color filter component 21 and the straight lens 22, providing a stable light input for subsequent color separation and image generation, and ensuring the clarity and brightness of the projected image.

[0038] In one embodiment, the color separation module 3 is connected to the output end of the light preprocessing module 2 , and the color separation module 3 includes a dichroic filter 31 for separating the preprocessed light into different colors and then guiding them into the light uniformization module 4 .

[0039] Specifically, the dichroic filter 31 in the color separation module 3 can accurately separate the pre-processed light into different colors to ensure that each color of light can be processed and guided independently, providing an accurate color basis for subsequent light homogenization and image generation. When projecting, the color of the image is purer and brighter, avoiding visual blur or distortion caused by color mixing or inaccuracy.

[0040] It can be understood that the material of the dichroic filter 31 has special optical properties. For two specific colors of light, the light processed by the dichroic filter 31 will be separated into two parts, one part is the specific color light that is transmitted, and the other part is the other color light that is reflected. These two parts of light are respectively guided to the imaging components to finally synthesize a color image.

[0041] In one embodiment, the dichroic filter includes a first filter 311 and a second filter 312 , the second filter 312 is arranged parallel to the first filter 311 , and the top surface level of the second filter 312 is lower than the top surface level of the first filter 311 .

[0042] Specifically, in this embodiment, two dichroic filters are preferably used to filter or reflect red, blue and green light. Further, the first filter 311 is used to transmit blue light and reflect green light, and the second filter 312 is used to transmit green light and reflect red light, that is, the blue array 211 is arranged on the side of the first filter 311 away from the light homogenization module, and the green array 212 is arranged on the side of the first filter 311 close to the light homogenization module; the green array 212 is arranged on the side of the second filter 312 away from the light homogenization module, and the red array 213 is arranged on the side of the second filter 312 close to the light homogenization module; at the same time, the top surface level of the second filter 312 is lower than the top surface level of the first filter 311, so as to ensure that the blue light penetrating the first filter 311 will not pass through the second filter 312. It is understandable that the installation tilt angles of the first filter 311 and the second filter 312 need to be accurately measured and designed to control the incident angle of light, thereby ensuring that the dichroic filter 31 can accurately separate the required color light.

[0043] In one embodiment, the light uniformity module 4 is connected to the output end of the color separation module 3 , and the light uniformity module 4 includes an optical integrator 41 , and the optical integrator 41 is used to receive the light emitted by the color separation module 3 and perform uniform processing on the light.

[0044] Specifically, the presence of the light uniformity module 4 in the light uniformity module 4 optimizes the performance of the entire projection system. The uniformity treatment of light of different colors by the optical integrator 41 helps to ensure the uniformity of the entire projected image. Whether it is the central area or the edge part of the image, light of different colors can be projected with a relatively uniform intensity distribution, so that the projected image has consistent brightness and color saturation in each area, improving the quality and visual effect of the image. When the image is projected, there will be no local overbrightness or overdarkness, and the colors are saturated and consistent.

[0045] In one embodiment, the optical integrator 41 includes a focusing element 411, an optical cavity 412 and a guiding element 413, wherein the focusing element 411, the optical cavity 412 and the guiding element 413 are arranged in sequence, the focusing element 411 is used to gather the light emitted by the color separation module 3 and guide it into the optical cavity 412, the optical cavity 412 is used to propagate and mix the light, and the guiding element 413 is used to receive the light emitted by the optical cavity 412 and guide the light into the guide correction module 5.

[0046] Specifically, the focusing element 411 can gather the light of different colors emitted by the color separation module 3, reduce the scattering and loss of light, make the light entering the optical cavity 412 more concentrated, and improve the utilization efficiency of light. At the same time, the focusing element 411 accurately guides the light into the optical cavity 412, ensures that the light propagates along a predetermined path, avoids the deviation and confusion of the light, and ensures that the light of different colors can enter the optical cavity 412 in an orderly manner for further processing. It can be understood that in this embodiment, the focusing element 411 adopts a focusing lens with focusing characteristics.

[0047] Furthermore, light of different colors is reflected and refracted multiple times in the optical cavity 412, which prolongs the propagation path of the light, so that the light can be more fully propagated in the optical cavity 412. In the process of light propagation, the optical cavity 412 can promote the natural mixing of light of different colors. Due to the multiple reflections and refractions of light in the cavity, light of different colors is intertwined and merged with each other, achieving uniform mixing of colors to produce richer and more realistic color effects, thereby improving the quality of the projected image.

[0048] Furthermore, the guiding element 413 can accurately receive the propagated and mixed light emitted from the optical cavity 412, and guide it into the guiding correction module 5. The guiding element 413 is used to connect the optical integrator 41 and the guiding correction module 5, so that the light transmission between different modules is smoother and more efficient, avoiding the leakage and loss of light, and smoothly entering the next processing link. It can be understood that the optical characteristics of the guiding element 413 can be adjusted according to specific needs to adapt to different projection environments and requirements.

[0049] In one embodiment, a scattering element and a reflecting element are disposed in the optical cavity 412 . The scattering element is used to scatter the light entering the optical cavity 412 , and the reflecting element is used to reflect the light entering the optical cavity 412 .

[0050] Specifically, the scattering element in the optical cavity 412 can scatter the light entering the optical cavity 412, so that the light entering the optical cavity 412 is scattered into light in multiple directions, so that the light can cover every corner of the optical cavity 412, avoiding the situation of local over-brightness or over-darkness, thereby achieving a more uniform distribution in the optical cavity 412. The reflective element reflects the light entering the optical cavity 412, so that the light is continuously reflected and propagated back and forth in the optical cavity 412. In this process, the reflective element cooperates with the scattering element, and the scattering element also continuously scatters the light, so that the light can be more evenly distributed after each reflection. Through this repeated reflection and scattering, the light gradually reaches a highly uniform state in the optical cavity 412.

[0051] In one embodiment, the input end of the guide correction module 5 is connected to the output end of the light uniformity module 4, the guide correction module 5 is a shooting prism assembly, the image generation module 6 is connected to the first output end of the shooting prism assembly, and the projection and adjustment module 7 is connected to the second output end of the shooting prism assembly.

[0052] Specifically, the guiding correction module 5 is used to connect the light uniformization module 4, the image generation module 6 and the projection and adjustment module 7, ensuring smooth and efficient light transmission between the modules. Furthermore, the guiding correction module 5 uses a shooting prism assembly, which can accurately guide the propagation direction of the light, so that the light can be guided to the image generation module 6 and the projection and adjustment module 7 according to a predetermined path. At the same time, the shooting prism assembly also has the function of image correction, which adjusts the light deviation caused by the vibration of the equipment, temperature changes or manufacturing errors, thereby ensuring the accuracy and clarity of the projected image and avoiding problems such as image deformation, blur or distortion.

[0053] In one embodiment, the image generation module 6 includes a digital micromirror device 61 , in which a plurality of micro-mirror arrays and a micromirror control circuit are provided to adjust the reflection direction of light and generate an image.

[0054] Specifically, the micro-mirror array in the digital micro-mirror device 61 is composed of a large number of extremely small mirrors, which can adjust their angles independently. The micro-mirror control circuit is responsible for controlling the angle change of the micro-mirror array, so as to quickly and accurately adjust the angle of each mirror according to the input image signal, realize the real-time generation of the image and ensure the high resolution and high definition of the projected image. At the same time, the micro-mirror array also needs to ensure that the image is projected into the shooting prism assembly so that the image is smoothly transmitted to the projection and adjustment module 7.

[0055] In one embodiment, the projection and adjustment module 7 includes a projection lens group 71 for receiving the image generated by the digital micromirror device 61 . The projection lens group 71 includes a plurality of optical lenses for adjusting light and projecting an image.

[0056] Specifically, the optical lenses in the projection lens group 71 are carefully designed and combined to accurately receive the image light generated by the digital micromirror device 61 and transmitted through the shooting prism assembly, and project the image clearly on the target surface (such as an arm). At the same time, by designing the type, arrangement, position, installation angle and other parameters of the optical lenses in the projection lens group 71, the intensity, direction and color of the light are adjusted, thereby controlling the propagation path and focusing degree of the light, and then adjusting the brightness, contrast and color saturation of the image. This allows the projected image to adapt to different ambient light conditions and user needs, providing better visual effects.

[0057] It can be understood that, in this embodiment, the input end of the shooting prism assembly is arranged between the first output end and the second output end, and the first output end is arranged opposite to the second output end, that is, the incident direction of the input end entering the shooting prism assembly is perpendicular to the propagation direction of the image between the digital micromirror device 61 and the projection lens group 71. The shooting prism assembly is used to make the light and the image propagate between the light uniform module 4, the image generation module 6 and the projection and adjustment module 7, and the light is reflected and refracted in the shortest path inside the prism assembly, shortening the horizontal distance between the light uniform module 4, the image generation module 6 and the projection and adjustment module 7, and greatly improving the compactness of the structure.

[0058] In summary, in the present embodiment, a projection device for a watch provides light through a light emitting module 1, and after preliminary processing by the color filter component 21 and the straight lens 22 of the light preprocessing module 2, the light enters the two-color filter 31 of the color separation module 3 and is separated into different color lights, and then is homogenized by the optical integrator 41. Then, through the shooting prism component guidance correction, the digital micromirror device 61 controls the reflector to generate an image according to the image signal, and finally the projection lens group 71 adjusts the light and projects the image. While optimizing the image quality and enhancing the stability and reliability, the projection portability is improved, and a clear, bright, and accurate projection image can be presented on the projection target surface to meet the projection needs in different scenes.

[0059] The above examples are only used to further illustrate the technical content of the present invention, so that readers can understand it more easily, but they do not mean that the implementation of the present invention is limited to this. Any technical extension or re-creation made according to the present invention is protected by the present invention. The protection scope of the present invention shall be subject to the claims.

Claims

1. A projection device for a watch, characterized in that: include: A light emitting module, used to provide light required for projection; A light preprocessing module is used to preprocess the light, initially guide the light by color and adjust the propagation direction of light of different colors; A color separation module, used to separate light by color; Light uniformity module, used to uniformly process the light; A guide correction module for guiding light and correcting images; An image generation module, used for controlling the reflector to generate an image according to the image signal; The projection and adjustment module is used to focus light, adjust and project images.

2. A projection device for a watch according to claim 1, characterized in that: The light preprocessing module includes a color filter component and a straight lens. The color filter component includes a red array, a green array and a red array, which are used to preliminarily separate red light, green light and blue light. The straight lens is used to focus and adjust the direction of the light that has been preliminarily color-guided so that the preprocessed light enters the color separation module.

3. A projection device for a watch according to claim 1, characterized in that: The color separation module is connected to the output end of the light preprocessing module, and the color separation module includes a dichroic filter for separating the preprocessed light into different colors and then guiding them into the light uniformization module.

4. A projection device for a watch according to claim 3, characterized in that: The two-color filter includes a first filter and a second filter. The second filter is arranged parallel to the first filter. The top surface of the second filter is lower than the top surface of the first filter.

5. A projection device for a watch according to claim 1, characterized in that: The light uniformity module is connected to the output end of the color separation module. The light uniformity module includes an optical integrator. The optical integrator is used to receive the light emitted by the color separation module and perform uniform processing on the light.

6. A projection device for a watch according to claim 4, characterized in that: The optical integrator includes a focusing element, an optical cavity and a guiding element, which are arranged in sequence. The focusing element is used to gather the light emitted by the color separation module and guide it into the optical cavity. The optical cavity is used to propagate and mix the light. The guiding element is used to receive the light emitted by the optical cavity and guide the light into the guide correction module.

7. A projection device for a watch according to claim 5, characterized in that: A scattering element and a reflecting element are arranged in the optical cavity. The scattering element is used to scatter the light entering the optical cavity, and the reflecting element is used to reflect the light entering the optical cavity.

8. The projection device for a watch according to claim 1, characterized in that: The input end of the guide correction module is connected to the output end of the light uniformity module, the guide correction module is a shooting prism assembly, the image generation module is connected to the first output end of the shooting prism assembly, and the projection and adjustment module is connected to the second output end of the shooting prism assembly.

9. A projection device for a watch according to claim 7, characterized in that: The image generation module includes a digital micromirror device, in which a plurality of micro-mirror arrays and a micromirror control circuit are arranged, which are used to adjust the reflection direction of light and generate an image.

10. The projection device for a watch according to claim 8, characterized in that: The projection and adjustment module includes a projection lens group for receiving the image generated by the digital micromirror device. The projection lens group includes a plurality of optical lenses for adjusting light and projecting images.

Images