Rapid water mist removing structure of LCD projector

Abstract

The application relates to the field of projection technology, in particular to a quick water mist removing structure of an LCD projector, which comprises a lens assembly, an air flow driving mechanism arranged in a closed LCD projector, the air flow driving mechanism is arranged on one side of the lens assembly and is used for providing circulating air flow through the lens assembly, and a baffle which is movably arranged in the closed LCD projector, the baffle is arranged on the other side of the lens assembly, the baffle has a circulating state and a mist removing state, when the baffle is in the circulating state, the baffle in the circulating state closes the passage between the lens assembly and the inner cavity of the closed LCD projector, and when the baffle is in the mist removing state, the baffle in the mist removing state opens the passage between the lens assembly and the inner cavity of the closed LCD projector. The movable baffle is switched between the mist removing state and the circulating state to realize the quick removal of water mist.

Description

Technical Field

[0001] This application relates to the field of projection technology, and in particular to a rapid defogging structure for an LCD projector. Background Technology

[0002] Because of the large size of the LCD screen and the large aperture of the projection lens used in closed-type LCD projectors, especially the last lens element, the luminous flux per unit area is relatively low when light shines on the lens surface, resulting in a slow temperature rise on the lens surface. This makes it very easy for water vapor to form on the LCD screen and the surface of the lens element when the optical engine is powered on from a relatively low temperature and high humidity environment (relative to the internal temperature and humidity of the optical engine after it is powered on).

[0003] Currently, most optical engines use internal airflow circulation for heat dissipation. A fan drives airflow to circulate inside the optical engine, carrying away the heat generated by heat-generating components such as the heat-insulating glass and LCD screen in the projector. The circulated hot airflow then passes through external heat dissipation devices (such as heat sinks and air ducts) to expel the heat from the projector. Due to the enclosed nature of the optical engine, once water vapor forms on the surface of the LCD screen and the rear lens, it cannot be quickly eliminated. The presence of water vapor makes the projected image blurry, seriously affecting the user experience. Utility Model Content

[0004] Therefore, it is necessary to provide a rapid defogging structure for LCD projectors to solve the technical problem that water mist inside the optical engine of closed LCD projectors cannot be quickly eliminated in the prior art.

[0005] A rapid defogging structure for an LCD projector, comprising:

[0006] Lens assembly;

[0007] An airflow drive mechanism, disposed within a closed LCD projector, is located on one side of the lens assembly and provides circulating airflow through the lens assembly; and

[0008] A baffle is movably disposed inside the enclosed LCD projector. The baffle is located on the other side of the lens assembly. The baffle has a circulating state and a defogging state. When the baffle is in the circulating state, the baffle in the circulating state closes the channel between the lens assembly and the inner cavity of the enclosed LCD projector. When the baffle is in the defogging state, the baffle in the defogging state opens the channel between the lens assembly and the inner cavity of the enclosed LCD projector.

[0009] As a preferred embodiment of the rapid defogging structure for LCD projectors in this invention, an arc-shaped air duct is provided between the lens assembly and the cavity inside the enclosed LCD projector.

[0010] As a preferred embodiment of the rapid defogging structure for LCD projectors in this invention, the lens assembly includes a first lens, heat-insulating glass, an LCD screen, and a second lens arranged sequentially at intervals.

[0011] As a preferred embodiment of the rapid defogging structure for LCD projectors in this utility model, an air outlet duct is provided between the first lens and the heat-insulating glass, and between the heat-insulating glass and the LCD screen, and a return air duct is provided between the LCD screen and the second lens.

[0012] As a preferred embodiment of the rapid defogging structure for LCD projectors in this invention, the output end of the airflow driving mechanism is connected to the air outlet duct, and its input end is connected to the return air duct and the outside.

[0013] As a preferred embodiment of the rapid defogging structure for LCD projectors in this invention, when the baffle is in circulation, the baffle is located at the end of the return air duct.

[0014] As a preferred embodiment of the rapid defogging structure for LCD projectors in this utility model, when the baffle is in the defogging state, the baffle is located at the end of the air duct opening that connects to the cavity inside the enclosed LCD projector.

[0015] The beneficial effects of this utility model;

[0016] This invention achieves rapid removal of water mist by switching a movable baffle between a defogging state and a circulation state. When the baffle is in the defogging state, it closes the return air duct in the lens assembly. The airflow driven by the airflow mechanism causes the heat of the lens assembly to quickly enter the internal circulation system through the cavity. The humidity inside the cavity will decrease rapidly with the air duct, and the water mist caused by the temperature difference will dissipate quickly. When the baffle is in the circulation state, the connection between the baffle air duct opening and the cavity end restores the normal air duct circulation of the closed LCD projector. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the reflective enclosed system in an embodiment of this application;

[0019] Figure 2 This is a schematic diagram of the structure of the through-type closed system in the embodiments of this application;

[0020] Figure 3 This is a schematic diagram of the structure of the baffle in the defogging state in the embodiments of this application;

[0021] Figure 4 This is a schematic diagram of the structure of the baffle in the cyclic state in the embodiment of this application;

[0022] Figure 5 This is a schematic diagram of the structure of the baffle when it is moved by magnetic attraction in the embodiments of this application;

[0023] Figure 6 This is a schematic diagram of the structure of the baffle when it moves using a rotating shaft in an embodiment of this application.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. First lens;

[0026] 2. Insulated glass;

[0027] 3. LCD screen;

[0028] 4. Second lens;

[0029] 5. Airflow drive mechanism;

[0030] 6. Baffle plate;

[0031] 7. Cavity. Detailed Implementation

[0032] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0033] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0036] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0037] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0038] According to one aspect of this application, embodiments of this application provide a rapid defogging structure for an LCD projector, please refer to the following: Figures 1 to 6The rapid defogging device includes a lens assembly, an airflow drive mechanism 5, and a baffle 6. The airflow drive mechanism 5 is located inside the enclosed LCD projector, on one side of the lens assembly, and is used to provide circulating airflow through the lens assembly. The baffle 6 is movably located inside the enclosed LCD projector, on the other side of the lens assembly. The baffle 6 has a circulating state and a defogging state. When the baffle 6 is in the circulating state, the baffle 6 in the circulating state closes the channel between the lens assembly and the inner cavity 7 of the enclosed LCD projector. When the baffle 6 is in the defogging state, the baffle 6 in the defogging state opens the channel between the lens assembly and the inner cavity 7 of the enclosed LCD projector.

[0039] In this embodiment, the rapid defogging device includes a lens assembly, an airflow drive mechanism 5, and a baffle 6. The airflow drive mechanism 5 provides circulating airflow. The baffle 6 has a circulating state and a defogging state. When the baffle 6 is in the circulating state, the baffle 6 closes the channel through which the circulating airflow enters the cavity 7. The circulating airflow circulates in the lens assembly section, carrying away the heat generated by the heating element. When the baffle 6 is in the defogging state, the baffle 6 opens the channel through which the circulating airflow enters the cavity 7. The circulating airflow carries the heat generated by the heating element into the cavity 7. The humidity inside the cavity 7 will decrease rapidly with the circulating airflow, and the water mist caused by the temperature difference will dissipate quickly.

[0040] In one embodiment, such as Figure 1 and Figure 2 As shown, this rapid defogging device is mainly suitable for reflective closed system structures and direct-flow closed system structures. It uses the projector's own internal circulation heat and air duct to defog the screen and lens surface, without changing the internal circulation system and external structural features of the closed projection optical engine.

[0041] In one embodiment, an arc-shaped air duct is provided between the lens assembly and the cavity 7 inside the enclosed LCD projector. The circulating airflow generated by the airflow drive mechanism 5 can enter the cavity 7 through the air duct to realize the flow of gas and water vapor inside the cavity 7.

[0042] In one embodiment, the lens assembly includes a first lens 1, a heat-insulating glass 2, an LCD screen 3, and a second lens 4 arranged sequentially at intervals. The lens assembly is used to collimate and focus a light beam.

[0043] In one embodiment, an air outlet duct is provided between the first lens 1 and the heat-insulating glass 2, and between the heat-insulating glass 2 and the LCD screen 3. An air return duct is provided between the LCD screen 3 and the second lens 4. The circulating airflow generated by the airflow drive mechanism 5 circulates through the air outlet duct and the air return duct to carry away the heat generated by the heating element.

[0044] In one embodiment, the output end of the airflow drive mechanism 5 is connected to the air outlet duct, and its input end is connected to the return air duct and the outside. The circulating airflow generated by the output end of the airflow drive mechanism 5 enters the cavity 7 or the return air duct through the air outlet duct and the air duct opening. The input end guides the airflow entering the air duct opening through the return air duct, thereby realizing the function of airflow circulation and adding outside cold air to the airflow circulation.

[0045] In one embodiment, such as Figure 3 As shown, when the baffle 6 is in the defogging state, the baffle 6 is located at the end of the air outlet duct to prevent airflow from entering the return air duct. The airflow generated by the airflow drive mechanism 5 enters the cavity 7 through the air outlet duct and the air duct opening as shown by the arrow and then enters the outside, reducing the humidity inside the cavity 7.

[0046] In one embodiment, such as Figure 4 As shown, when the baffle 6 is in the circulation state, the baffle 6 is located at the end of the return air duct, disconnecting the connection between the air duct opening and the cavity 7. The airflow generated by the airflow drive mechanism 5 circulates normally through the air outlet and return air duct as shown by the arrow, carrying the heat generated by the heating element.

[0047] In one embodiment, such as Figure 5 As shown, the baffle 6 can be magnetically connected to the LCD projector. The baffle 6 has guide shafts at both ends that are connected to the LCD projector and are slidably connected to the guide posts. A magnet fixed to the baffle 6 is provided between a pair of guide posts. Another magnet with controllable polarity is provided at the position corresponding to the LCD projector and the magnet. By controlling the magnetism of the other magnet, the baffle 6 is slidably closed to achieve the sealing of the air duct opening and the return air duct.

[0048] In one embodiment, such as Figure 6 As shown, the baffle 6 adopts a rotating structure to connect with the LCD projector. One end of the baffle 6 is rotatably connected to the LCD projector through a rotating shaft, and the other end is connected to the LCD projector through a driving device. The output end of the driving mechanism is connected to the other end of the rotating shaft passing through the baffle 6. The air duct opening and return air duct are sealed by rotating the baffle 6.

[0049] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0050] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A rapid defogging structure for an LCD projector, characterized in that, include: Lens assembly; An airflow drive mechanism, disposed within a closed LCD projector, is located on one side of the lens assembly and provides circulating airflow through the lens assembly; and A baffle is movably disposed inside the enclosed LCD projector. The baffle is located on the other side of the lens assembly. The baffle has a circulating state and a defogging state. When the baffle is in the circulating state, the baffle in the circulating state closes the channel between the lens assembly and the inner cavity of the enclosed LCD projector. When the baffle is in the defogging state, the baffle in the defogging state opens the channel between the lens assembly and the inner cavity of the enclosed LCD projector.

2. The rapid defogging structure for an LCD projector according to claim 1, characterized in that, An arc-shaped air duct is provided between the lens assembly and the cavity inside the enclosed LCD projector.

3. The rapid defogging structure for LCD projectors according to claim 2, characterized in that, The lens assembly includes a first lens, heat-insulating glass, an LCD screen, and a second lens arranged at intervals.

4. The rapid defogging structure for an LCD projector according to claim 3, characterized in that, An air outlet duct is provided between the first lens and the heat-insulating glass, and between the heat-insulating glass and the LCD screen. An air return duct is provided between the LCD screen and the second lens.

5. The rapid defogging structure for an LCD projector according to claim 1, characterized in that, The output end of the airflow drive mechanism is connected to the air outlet duct, and its input end is connected to the return air duct and the outside.

6. The rapid defogging structure for an LCD projector according to claim 1, characterized in that, When the baffle is in circulation, the baffle is located at the end of the return air duct.

7. The rapid defogging structure for an LCD projector according to claim 1, characterized in that, When the baffle is in the defogging state, the baffle is located at the end of the air duct opening that connects to the cavity inside the enclosed LCD projector.

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