Anti-exposure light well
By introducing reflectors and heat dissipation devices into the optical well design of DMD chips, the problem of external light interference during DMD chip imaging is solved, and high-quality image display and chip protection are achieved.
Patent Information
- Application Number
- CN202422560218.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-23
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-10-23
AI Technical Summary
In the prior art, DMD chips are susceptible to external light interference during imaging, resulting in a decrease in imaging quality and may cause chip damage. Traditional light well designs are weak in anti-exposure function.
An anti-exposure light well is designed, including a light well, a reflective part and a heat dissipation device. The laser light reflected by DMD is received through the light well, the reflective part blocks the light light, and the heat dissipation device reduces the chip temperature and ensures the imaging quality.
Effectively prevent stubborn light from entering, improve image clarity and contrast, reduce light interference, protect DMD chips, and maintain imaging stability and high definition.
Smart Images
Figure CN223155309U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of optical imaging, and particularly relates to a light well for preventing exposure. Background Art
[0002] In the digital micromirror device (DMD) imaging technology, the DMD chip, as the core component, controls the reflection and projection of light by the precise flipping of the micromirror unit, so as to achieve high-quality image display. When the micromirror unit is at 0 degrees, the laser is in the off state. When the micromirror unit is at -12 degrees, the reflected laser enters the light well. When the micromirror unit is at 12 degrees, the reflected laser vertically enters the illumination lens for imaging. However, in practical applications, the DMD chip is prone to be interfered by external light during the imaging process, resulting in a decline in imaging quality and even damage to the chip. The traditional light well design mainly focuses on the considerations of light transmission and heat dissipation, but the anti-exposure function is relatively weak.
[0003] Therefore, this application has developed a light well for preventing exposure to solve the problems existing in the prior art. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a light well for preventing exposure to solve the problem that in the prior art, the inside of the connecting piece turns white due to long-term irradiation, resulting in stray light under the irradiation of light, which affects exposure and imaging quality.
[0005] The technical solution of the utility model is: a light well for preventing exposure, comprising:
[0006] A DMD chip for projecting an image;
[0007] An illumination lens for providing a light path;
[0008] An imaging lens for receiving the laser reflected by the DMD chip;
[0009] A connecting piece communicating with the illumination lens, and the illumination lens is arranged on one side surface of the connecting piece. The imaging lens and the illumination lens are located on two adjacent side surfaces of the connecting piece, and the imaging lens and the DMD chip are opposite in position. A light well is arranged inside the connecting piece. When the angle of the DMD chip changes, the light well receives the laser reflected by the DMD.
[0010] Preferably, the light well comprises a bottom and a reflecting part. The reflecting part is connected to the bottom, and both the bottom and the reflecting part are connected to the inner wall of the connecting piece and form a reflecting cavity with the inner wall of the connecting piece. The position of the reflecting cavity close to the DMD chip is an incident light port for receiving the reflected laser.
[0011] Preferably, the optical well is located at a position opposite to the rotated angle of the DMD chip, so that the reflected laser can enter the optical well.
[0012] Preferably, the reflecting portion is parallel to the inner wall of the connecting member. After the DMD chip rotates by an angle, the lowest reflected laser enters the reflection cavity and does not contact the end of the reflecting portion away from the bottom. The highest reflected laser irradiates on the inner wall of the connecting member and is reflected onto the reflecting portion.
[0013] Preferably, the reflecting portion is away from the position of the lens of the illumination lens. When the laser reflected by the DMD chip enters the illumination lens vertically, the space where the reflected laser is located does not contact the reflecting portion.
[0014] Preferably, a heat dissipation device is provided on the outer wall of the connecting member corresponding to the optical well.
[0015] Compared with the prior art, the advantages of the present utility model are as follows:
[0016] (1) After the reflected laser enters the optical well, due to the blockage of the reflecting portion, the reflected laser can only be reflected in the reflection cavity and cannot enter the outside to affect the lens.
[0017] (2) When the inner wall of the connecting member is irradiated for a long time, the color of the inner wall will turn white and be prone to reflection. The reflecting portion completely blocks the whitened area, and the reflected laser cannot leave the optical well, so that no stray light will be generated to affect the exposure effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The present utility model will be further described below in conjunction with the drawings and embodiments:
[0019] Figure 1 is a cross-sectional view of the internal structure of the connecting member of the present utility model;
[0020] Figure 2 is a schematic structural diagram of an optical well for preventing exposure of the present utility model;
[0021] Figure 3 is a side cross-sectional view of an optical well for preventing exposure of the present utility model;
[0022] Figure 4 is Figure 3 an enlarged schematic view of A in
[0023] Figure 5 is Figure 3 an enlarged schematic view of B in
[0024] Figure 6 is a top view of an optical well for preventing exposure of the present utility model.
[0025] Wherein: 1. DMD chip; 2. Illumination lens; 3. Imaging lens; 4. Connector; 5. Light well; 51. Bottom; 52. Reflection part; 53. Reflection cavity; 6. Heat dissipation device. Specific embodiments
[0026] The following will further elaborate on the content of the present utility model in conjunction with specific embodiments:
[0027] As Figure 1 - Figure 2 shown, a light well for preventing exposure includes a DMD chip 1, an illumination lens 2, an imaging lens 3, and a connector 4. The illumination lens 2 is disposed on one side surface of the connector 4 and is in communication with the connector 4. An imaging lens 3 is provided on an adjacent side surface, and the imaging lens 3 is disposed opposite to the DMD chip 1. When imaging with the DMD chip 1, the laser enters the connector 4 from the illumination lens 2 and reflects the laser onto the DMD chip 1. The micromirror unit on the DMD chip 1 quickly flips to form an image, and the image is displayed through the imaging lens 3. When the micromirror unit flips, the reflected laser will irradiate inside the connector 4. Among them, the micromirror unit has three angles, namely 0 degrees, -12 degrees, and 12 degrees. At 0 degrees, the laser is in the off state and does not perform imaging. At 12 degrees, the laser is reflected by the DMD chip 1 to form a vertical light beam. Since the imaging lens 3 is disposed opposite to the DMD chip 1, the imaging lens 3 displays the image on the DMD chip 1. At -12 degrees, the laser is reflected by the DMD chip 1 and enters the light well 5, and the reflected laser can only be reflected inside the light well 5 and cannot affect the lens.
[0028] In this embodiment, as Figure 3 - Figure 6 shown, the light well 5 includes a bottom 51 and a reflection part 52. The reflection part 52 is connected to the bottom 51 and is both connected to the inner wall of the connector 4 to form a reflection cavity 53. When the micromirror unit is at -12 degrees, the light well 5 is located on the reflection path of the reflected laser. One end of the reflection cavity 53 close to the DMD chip 1 is the light inlet, and the reflected laser enters the light well 5 through the light inlet, realizing the isolation of the reflected laser. When the reflected laser enters the interior of the light well 5, due to the geometric shape of the reflection cavity 53, the light will be reflected multiple times inside the cavity. By isolating the reflected laser, the light well 5 can reduce the scattering of light and stray light phenomena in the system, contribute to improving the clarity and contrast of the image, making the image sharper and more delicate, and can also reduce the interference and scattering between lights and improve the imaging quality.
[0029] Furthermore, as Figure 4As shown, the reflecting portion 52 is parallel to the inner wall of the connecting member 4, so that the reflected laser entering the light well 5 will not be reflected from the light well 5 to the outside due to the irregular surface of the reflecting portion 52, causing damage to the DMD chip 1, and the reflected laser reflected by the DMD chip 1 can all enter the reflecting cavity 53, first irradiate the inner wall of the connecting member 4, and then reflect to the reflecting portion 52, so that all the reflected laser can be received by the reflecting cavity 53, instead of being reflected by the inner wall of the connecting member 4 and still being reflected to the outside of the light well 5, affecting the imaging quality, and at the same time, it can also disperse the heat generated by the DMD chip 1 during operation, take away part of the heat through the path of the reflected laser, reduce the working temperature of the chip 1, and improve the stability of the system.
[0030] Specifically, the reflecting portion 52 is not limited to being parallel to the inner wall of the connecting member 4. As long as the reflected laser is always in the reflecting cavity 53 during laser reflection, so that the reflected laser cannot be reflected from the light well 5, no stray light will be generated, thereby not interfering with the imaging quality and reducing the clarity of the image. When the reflected laser is irradiated in the reflecting cavity 53 for a long time, a whitish area is formed on the inner wall of the connecting member 4, and the reflecting portion 52 blocks the whitish area, so that the stray light formed in the area cannot leave the reflecting cavity 53, thereby not affecting the exposure.
[0031] Furthermore, when the micromirror unit is at 12 degrees, the reflected laser falls vertically onto the illumination lens 2, and the projection of the reflective portion 52 on the illumination lens 2 does not fall on the lens of the illumination lens 2, thereby avoiding the light well 5 from blocking the illumination lens 2 and causing unnecessary interference to the imaging.
[0032] In order to reduce the heat of the light well 5, a heat sink 6 is provided on the outer wall of the connector 4. The heat sink 6 corresponds to the position of the light well 5. The heat sink 6 can effectively reduce the operating temperature of the DMD chip 1 and keep the DMD chip 1 at a stable operating temperature, thereby ensuring high definition and high contrast of the projected image.
[0033] The implementation principle of this embodiment:
[0034] When performing DMD imaging, the laser enters the connector 4 through the illumination lens 2 and is reflected onto the DMD chip 1. The micromirror unit on the DMD chip 1 flips quickly. When it is at 0 degrees, the laser is turned off and no imaging is performed. When the micromirror unit flips to -12 degrees, the laser enters the light well 5 by reflection and is reflected in the light well 5, thereby preventing the laser from damaging the imaging lens 3 or the DMD chip 1. When the reflection cavity 53 is irradiated for a long time, the irradiated area will turn white. At this time, the reflective portion 52 blocks the stray light generated in the area to prevent it from affecting the exposure effect and thus affecting the imaging quality. When the micromirror unit flips to 12 degrees, the laser will irradiate the imaging lens 3 vertically, and the light well 5 will not block the path of the laser, resulting in incomplete imaging.
[0035] The above embodiments are only used to illustrate the technical concept and features of the present utility model. The purpose is to enable those who are familiar with this technology to understand the content of the present utility model and implement it accordingly, and it should not be used to limit the protection scope of the present utility model. For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, it is intended to encompass all changes falling within the meaning and scope of the equivalent elements of the claims in the present utility model.
Claims
1. A light well for preventing exposure, characterized in that, Including: A DMD chip (1) for projecting an image; An illumination lens (2) for providing a light path; An imaging lens (3) for receiving the laser reflected by the DMD chip (1); A connecting member (4) communicating with the illumination lens (2), and the illumination lens (2) is disposed on one side surface of the connecting member (4). The imaging lens (3) and the illumination lens (2) are located on two adjacent side surfaces of the connecting member (4), and the imaging lens (3) is opposite to the DMD chip (1) in position. A light well (5) is provided in the connecting member (4). When the angle of the DMD chip (1) changes, the light well (5) receives the laser reflected by the DMD.
2. The anti-exposure light well according to claim 1, wherein: The light well (5) includes a bottom (51) and a reflecting portion (52). The reflecting portion (52) is connected to the bottom (51). Both the bottom (51) and the reflecting portion (52) are connected to the inner wall of the connecting member (4) and form a reflection cavity (53) with the inner wall of the connecting member (4). The position of the reflection cavity (53) close to the DMD chip (1) is a light inlet for receiving the reflected laser.
3. The light well for preventing exposure according to claim 2, characterized in that: The light well (5) is located at a position opposite to the DMD chip (1) after rotation of the angle, so that the reflected laser can enter the light well (5).
4. A light well for preventing exposure according to claim 2, wherein: The reflecting portion (52) is parallel to the inner wall of the connecting member (4). When the DMD chip (1) rotates by an angle, the lowest reflected laser enters the reflection cavity (53) and does not contact the end of the reflecting portion (52) away from the bottom (51). The highest reflected laser irradiates on the inner wall of the connecting member (4) and is reflected to the reflecting portion (52).
5. A light well for preventing exposure, characterized in that: The reflecting portion (52) is away from the position of the lens of the illumination lens (2). When the laser reflected by the DMD chip (1) enters the illumination lens (2) vertically, the space where the reflected laser is located does not contact the reflecting portion (52).
6. The light well for preventing exposure according to claim 1, characterized in that: A heat dissipation device (6) is provided on the outer wall of the connecting member (4) corresponding to the light well (5).