Angle adjustment mechanism of LCD screen and lateral projection device

Abstract

The application relates to an angle adjusting mechanism of an LCD screen and a lateral projection device, and the angle adjusting mechanism comprises a shell, one side of which is provided with an adjusting window; a static screen assembly, which is fixedly installed in the shell; an LCD screen assembly, which is rotationally connected with the LCD screen assembly; the LCD screen assembly is connected with a driving shaft; an adjusting assembly, which comprises a linear driving assembly and a yoke; the linear driving assembly is installed outside the shell; the yoke is connected with the linear driving assembly, the yoke is driven to move by the linear driving assembly; one end of the yoke is provided with a bayonet, the yoke penetrates through the adjusting window and extends into the shell, and the driving shaft is movably arranged in the bayonet; when the linear driving assembly drives the yoke to move, the LCD screen assembly is driven to rotate. According to the Sharm law, the angle of the LCD screen assembly is adjusted, the plane where the LCD screen assembly is located intersects with the mirror plane and the object plane at a straight line, the depth of field is increased, different inclination angles are dynamically adapted, the whole projection surface is ensured to be clearly focused, and local blur is avoided.

Description

Technical Field

[0001] This application relates to the field of projection equipment technology, and in particular to an angle adjustment mechanism for an LCD screen and a side projection device. Background Technology

[0002] In space-constrained scenarios, such as bedrooms and meeting rooms, side projection devices are necessary. A common problem with side projection devices is trapezoidal distortion or blurry images in certain areas, affecting the viewing experience. This is because, during side projection, the projection screen is not perpendicular to the optical axis, causing the image quality to deteriorate as the projection angle increases.

[0003] Therefore, there is a need for an LCD screen angle adjustment mechanism and a side projection device that can improve image clarity and avoid local blurring in side projection. Utility Model Content

[0004] Therefore, it is necessary to provide an angle adjustment mechanism for an LCD screen and a side projection device, the specific technical solution of which is as follows.

[0005] An angle adjustment mechanism for an LCD screen includes:

[0006] The casing has an adjustment window on one side;

[0007] The static screen assembly is fixedly installed inside the housing;

[0008] LCD screen assembly, rotatably connected to LCD screen assembly; the LCD screen assembly is connected to a drive shaft;

[0009] The adjustment assembly includes a linear drive assembly and a shift fork; the linear drive assembly is mounted outside the housing; the shift fork is connected to the linear drive assembly and is driven to move by the linear drive assembly; one end of the shift fork is provided with a bayonet, and the shift fork extends into the housing through the adjustment window, so that the drive shaft is movably disposed in the bayonet; when the linear drive assembly drives the shift fork to move, it drives the LCD screen assembly to rotate.

[0010] Furthermore, the latch of the shift fork is U-shaped; an elastic rubber ring is sleeved on the drive shaft; the elastic rubber ring is engaged within the latch.

[0011] Furthermore, a guide frame is connected to the outside of the adjustment window, and a guide groove is provided inside the guide frame; a stabilizing plate is provided on the fork, and the stabilizing plate is movably installed in the guide groove and covers the adjustment window.

[0012] Furthermore, elastic foam is provided between the stabilizing plate and the adjustment window.

[0013] Furthermore, the linear drive assembly includes a mounting bracket and a lead screw stepper motor; the mounting bracket is mounted on the housing, and the lead screw stepper motor is mounted on the mounting bracket; the shift fork is connected to the lead screw stepper motor, and the lead screw stepper motor drives the shift fork to move.

[0014] Furthermore, the static screen assembly includes a static bracket, and the static bracket has pivot holes on its upper and lower sides respectively; the LCD screen assembly includes a dynamic bracket and an LCD screen, and the LCD screen is mounted on the dynamic bracket; the dynamic bracket has rotating shafts on its upper and lower sides respectively, and the rotating shafts are rotatably engaged with the pivot holes.

[0015] Furthermore, the static support has a first arc-shaped groove, and a pressure block is connected to the static support. The pressure block has a second arc-shaped groove, and the first arc-shaped groove and the second arc-shaped groove cooperate to form a pivot hole.

[0016] Furthermore, the rotation axis is located on the centerline of the dynamic support; the drive shaft is close to the edge of the dynamic support.

[0017] A side projection device, comprising:

[0018] The angle adjustment mechanism described in any of the above items;

[0019] A lens assembly is mounted on a housing; the lens assembly includes a lens, and the plane on which the lens is located intersects the plane on which the LCD screen assembly is located;

[0020] The total reflection mirror is installed inside the housing and located between the lens group and the LCD screen assembly, so that the light path passes through the LCD screen assembly and is reflected by the total reflection mirror to the lens.

[0021] Specifically, the LCD screen assembly is also provided with heat-insulating glass on the side away from the static screen assembly.

[0022] Beneficial effects: The LCD screen angle adjustment mechanism provided by this utility model drives the fork to move through the linear drive component, thereby adjusting the angle of the LCD screen component so that the plane on which the LCD screen component is located intersects the mirror plane and the object plane in a straight line. By using the Schahm's law, the three planes intersect in a single Schahm line, increasing the depth of field without changing the aperture size, dynamically adapting to different tilt angles, ensuring clear focus on the entire projection surface, and avoiding local blurring.

[0023] The present invention provides an LCD screen angle adjustment mechanism that adjusts the angle of the LCD screen assembly so that the LCD screen, lens and projection surface intersect on a Sham line, thereby ensuring that the entire projection surface is clearly focused and avoiding local blurring. Attached Figure Description

[0024] 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.

[0025] Figure 1 This is a schematic diagram of the overall structure of the side projection device;

[0026] Figure 2 A schematic diagram showing the side projection device with the mounting bracket concealed.

[0027] Figure 3 This is one of the schematic diagrams of an angle adjustment mechanism;

[0028] Figure 4 This is the second schematic diagram of the angle adjustment mechanism;

[0029] Figure 5 This is one of the cross-sectional views of the angle adjustment mechanism;

[0030] Figure 6 for Figure 5 Enlarged view of region A in the middle;

[0031] Figure 7 This is a top view of the angle adjustment mechanism;

[0032] Figure 8 This is the second sectional view of the angle adjustment mechanism;

[0033] Figure 9 This is a partial exploded diagram of the angle adjustment mechanism.

[0034] Explanation of reference numerals in the attached drawings: 1. Housing; 2. Static screen assembly; 3. LCD screen assembly; 4. Adjustment assembly; 5. Lens assembly; 6. Total reflection mirror; 7. Heat-insulating glass; 8. Optical path;

[0035] 11. Adjustable window; 12. Guide frame; 13. Guide groove; 14. Elastic foam;

[0036] 21. Fresnel lens; 22. Static support; 23. Rotary shaft hole; 24. Snap-fit; 25. Pressure block; 26. Screw; 27. Bushing;

[0037] 31. Drive shaft; 32. Elastic rubber ring; 33. LCD screen; 34. Dynamic bracket; 35. Rotating shaft;

[0038] 41. Shift fork; 42. Mounting bracket; 43. Lead screw stepper motor; 44. Position sensor; 45. Magnet; 46. Bayonet; 47. Stabilizing plate. Detailed Implementation

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] Example 1

[0046] Reference Figure 1 and Figure 3 As shown, this embodiment provides an angle adjustment mechanism for an LCD screen 33, including a housing 1, a static screen assembly 2, an LCD screen assembly 3, and an adjustment assembly 4. (Refer to...) Figure 5 As shown, an adjustment window 11 is provided on one side of the housing 1. (Continuing to refer to...) Figure 1 As shown, the static screen assembly 2 is fixedly installed inside the housing 1. The LCD screen assembly 3 is rotatably connected to the LCD screen assembly 3, so that the LCD screen assembly 3 is also located inside the housing 1. A drive shaft 31 is connected to the LCD screen assembly 3.

[0047] Reference Figure 3 As shown, the adjustment assembly 4 includes a linear drive assembly and a shift fork 41. The linear drive assembly is mounted outside the housing 1. The shift fork 41 is connected to the linear drive assembly and is driven to move by the linear drive assembly. One end of the shift fork 41 is provided with a bayonet 46, and the shift fork 41 extends into the housing 1 through the adjustment window 11, so that the drive shaft 31 is movably disposed within the bayonet 46; when the linear drive assembly drives the shift fork 41 to move, it drives the LCD screen assembly 3 to rotate.

[0048] The angle adjustment mechanism of the LCD screen 33 provided in this embodiment drives the fork 41 to move through the linear drive component, thereby moving the LCD screen component 3 and adjusting the angle of the LCD screen component 3 so that the plane on which the LCD screen component 3 is located intersects the mirror plane and the object plane in a straight line. By using the Schamm's law, the three planes intersect in a single Schamm line, increasing the depth of field without changing the aperture size, dynamically adapting to different tilt angles, ensuring clear focus on the entire projection surface, and avoiding local blurring.

[0049] Specifically, the latch 46 of the shift fork 41 is U-shaped; an elastic rubber ring 32 is sleeved on the drive shaft 31; the elastic rubber ring 32 is engaged within the latch 46. The elastic rubber ring 32 has the ability to undergo elastic deformation, allowing it to be tightly engaged within the latch 46 and to move relative to it. When the shift fork 41 moves linearly, it can move the drive shaft 31, causing the LCD screen assembly 3 to rotate under the rotational constraints of the LCD screen assembly 3 and the static screen assembly 2, thereby adjusting the angle of the LCD screen assembly 3.

[0050] Specifically, refer to Figure 6 As shown, a guide frame 12 is connected to the outside of the adjustment window 11, and a guide groove 13 is provided inside the guide frame 12. A stabilizing plate 47 is provided on the fork 41, and the stabilizing plate 47 is movably connected in the guide groove 13 and covers the adjustment window 11. The stabilizing plate 47 moves stably in a set direction under the guidance of the guide groove 13, and the size of the stabilizing plate 47 is larger than the size of the adjustment window 11, thereby covering the adjustment window 11 and providing protection for the internal structure of the housing 1.

[0051] Specifically, an elastic foam 14 is provided between the stabilizing plate 47 and the adjusting window 11. The thickness of the elastic foam 14 is greater than the gap between the stabilizing plate 47 and the outer shell, and one side of the elastic foam 14 is adhered to the outer shell 1 with adhesive, while the other side is smooth. This allows the stabilizing plate 47 to squeeze the elastic foam 14 during movement to eliminate gaps and ensures that the stabilizing plate 47 can move smoothly relative to the elastic foam 14.

[0052] Specifically, refer to Figure 1 and Figure 6 As shown, the linear drive assembly includes a mounting bracket 42 and a lead screw stepper motor 43. The mounting bracket 42 is mounted on the housing 1, and the lead screw stepper motor 43 is mounted on the mounting bracket 42; the shift fork 41 is connected to the lead screw stepper motor 43, and the lead screw stepper motor 43 drives the shift fork 41 to move. In this embodiment, a cylinder, hydraulic cylinder, or other linear moving equipment can also be used to replace the lead screw stepper motor 43.

[0053] Specifically, a position sensor 44 is mounted on the mounting bracket 42. This position sensor 44 is used to detect the position of the shift fork 41, thereby providing real-time feedback and adjusting the rotation angle of the LCD screen assembly 3. The position sensor 44 can take various forms, including contact sensors and non-contact sensors. In this embodiment, a non-contact sensor is used. Specifically, a magnet 45 is mounted on the shift fork 41, and a sensor for detecting the position of the magnet 45 is mounted on the mounting bracket 42.

[0054] Specifically, refer to Figure 9 As shown, the static screen assembly 2 includes a static bracket 22 and a Fresnel lens 21. The static bracket 22 has pivot holes 23 on its upper and lower sides, and the Fresnel lens 21 is mounted on the static bracket 22 via a snap-fit ​​24. The LCD screen assembly 3 includes a dynamic bracket 34 and an LCD screen 33, with the LCD screen 33 mounted on the dynamic bracket 34. The dynamic bracket 34 has rotating shafts 35 on its upper and lower sides, and these rotating shafts 35 are rotatably engaged with the pivot holes 23. The rotational engagement between the dynamic bracket 34 and the static bracket 22 via the rotating shafts 35 and pivot holes 23 allows the dynamic bracket 34 to rotate around the Z-axis. This also limits the position of the dynamic bracket 34.

[0055] Specifically, to facilitate the installation between the dynamic bracket 34 and the static bracket 22, at least one of the pivot holes 23 is designed to be detachable. The specific structure is as follows: the static bracket 22 has a first arc-shaped groove, and a pressure block 25 is connected to the static bracket 22. The pressure block 25 has a second arc-shaped groove, and the first and second arc-shaped grooves cooperate to form a pivot hole 23. The pressure block 25 is connected to the static bracket 22 by screws 26, thereby assembling the dynamic bracket 34 onto the static bracket 22. To ensure smooth rotation between the dynamic bracket 34 and the static bracket 22, a bushing 27 is also provided between the rotating shaft 35 and the pivot hole 23.

[0056] Specifically, the rotation shaft 35 is located on the center line of the dynamic support 34; the drive shaft 31 is close to the edge of the dynamic support 34.

[0057] Example 2

[0058] Reference Figure 1 As shown, this embodiment provides a side projection device, including an angle adjustment mechanism, a lens group 5, and a total reflection mirror 6 as described in Embodiment 1. The lens group 5 is mounted on the housing 1. The lens group 5 includes a lens, and the plane where the lens is located intersects the plane where the LCD screen assembly 3 is located; the total reflection mirror 6 is mounted inside the housing 1 and located between the lens group 5 and the LCD screen assembly 3, so that the light path 8 passes through the LCD screen assembly 3 and is reflected by the total reflection mirror 6 to the lens.

[0059] The LCD screen 33 angle adjustment mechanism provided in this embodiment adjusts the angle of the LCD screen assembly 3 so that the LCD screen 33, the lens, and the projection surface intersect on a Sham line, thereby ensuring that the entire projection surface is clearly focused and avoiding local blurring.

[0060] Specifically, the LCD screen assembly 3 is further provided with heat-insulating glass 7 on the side away from the static screen assembly 2, thus protecting the LCD screen assembly 3.

[0061] 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.

[0062] 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. An angle adjustment mechanism for an LCD screen, characterized in that, include: The casing has an adjustment window on one side; The static screen assembly is fixedly installed inside the housing; LCD screen assembly, rotatably connected to the LCD screen assembly; The LCD screen assembly is connected to a drive shaft; The adjustment assembly includes a linear drive assembly and a shift fork; the linear drive assembly is mounted outside the housing; the shift fork is connected to the linear drive assembly and is driven to move by the linear drive assembly; one end of the shift fork is provided with a bayonet, and the shift fork extends into the housing through the adjustment window, so that the drive shaft is movably disposed in the bayonet; when the linear drive assembly drives the shift fork to move, it drives the LCD screen assembly to rotate.

2. The angle adjustment mechanism for an LCD screen according to claim 1, characterized in that, The latch of the shift fork is U-shaped; an elastic rubber ring is sleeved on the drive shaft; the elastic rubber ring is locked inside the latch.

3. The angle adjustment mechanism for an LCD screen according to claim 1, characterized in that, The adjustment window is connected to a guide frame on the outside, and the guide frame is provided with a guide groove; the fork is provided with a stabilizing plate, which is movably installed in the guide groove and covers the adjustment window.

4. The angle adjustment mechanism for an LCD screen according to claim 3, characterized in that, Elastic foam is provided between the stabilizing plate and the adjustment window.

5. The angle adjustment mechanism for an LCD screen according to claim 1, characterized in that, The linear drive assembly includes a mounting bracket and a lead screw stepper motor; the mounting bracket is mounted on the housing, and the lead screw stepper motor is mounted on the mounting bracket; the shift fork is connected to the lead screw stepper motor, and the lead screw stepper motor drives the shift fork to move.

6. The angle adjustment mechanism for an LCD screen according to claim 1, characterized in that, The static screen assembly includes a static bracket, and the static bracket has pivot holes on its upper and lower sides respectively; the LCD screen assembly includes a dynamic bracket and an LCD screen, and the LCD screen is mounted on the dynamic bracket; the dynamic bracket has rotating shafts on its upper and lower sides respectively, and the rotating shafts are rotatably engaged with the pivot holes.

7. The angle adjustment mechanism for an LCD screen according to claim 6, characterized in that, The static support has a first arc-shaped groove, and a pressure block is connected to the static support. The pressure block has a second arc-shaped groove, and the first arc-shaped groove and the second arc-shaped groove cooperate to form a pivot hole.

8. The angle adjustment mechanism for an LCD screen according to claim 6, characterized in that, The rotation axis is located on the center line of the dynamic support; the drive shaft is close to the edge of the dynamic support.

9. A side projection device, characterized in that, include: The angle adjustment mechanism as described in any one of claims 1 to 8; A lens assembly is mounted on a housing; the lens assembly includes a lens, and the plane on which the lens is located intersects the plane on which the LCD screen assembly is located; The total reflection mirror is installed inside the housing and located between the lens group and the LCD screen assembly, so that the light path passes through the LCD screen assembly and is reflected by the total reflection mirror to the lens.

10. A side projection device according to claim 9, characterized in that, The LCD screen assembly is also provided with heat-insulating glass on the side away from the static screen assembly.

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