Laser projection display device

Abstract

The embodiment of the invention provides laser projection display equipment, and belongs to the technical field of display, and the laser projection display equipment comprises an optical element and an adjusting mechanism. The adjusting mechanism comprises a fixing piece, a displacement adjusting assembly and a first adjusting piece, and the fixing piece is connected with the optical element; the first adjusting piece is rotationally connected with the engine shell around a first axis, a first limiting surface and a second limiting surface which are in contact with each other are arranged between the first adjusting piece and the fixing piece, and the first limiting surface and the second limiting surface are both partial spherical surfaces of which the axes are located on the first axis; the first adjusting piece is provided with a first pushing face which intersects with the first axis and is not perpendicular to the first axis. The side, facing the first adjusting piece, of the fixing piece is provided with two first abutting parts with the same length, and the two first abutting parts abut against the first pushing face. According to the laser projection equipment, the adjusting precision of the adjusting mechanism is improved, the adjusting difficulty of the optical element is reduced, the assembling difficulty of the optical engine is reduced, and the production efficiency of the laser projection display equipment is improved.

Description

Technical Field

[0001] The embodiments of the present application relate to display technology, and in particular to a laser projection display device. Background Art

[0002] A laser projection display device is a display device that uses laser as a light source and projects images outward. The optical engine is a key component in a laser projection display device. The optical engine usually includes an engine housing, and a light source, an illumination system, a digital micromirror device (DMD) and a projection system located in the engine housing. The laser emitted by the light source is irradiated onto the DMD through the illumination system and modulated into an image by the DMD. The modulated image is projected outward through the projection system. During the assembly process of the optical engine, in order to ensure the accuracy of the optical path, it is usually necessary to adjust the position of at least one optical element in the light source, illumination system and projection system, such as a reflector.

[0003] In the related art, the optical engine is generally provided with an adjustment mechanism for adjusting the position of the optical element. The adjustment mechanism includes a fixing member, three adjustment bolts and three compression springs. The fixing member is connected to the optical element, and the fixing member is provided with three threaded holes, and the three threaded holes are arranged in a right triangle. The engine housing is provided with three through holes opposite to the three threaded holes. The three adjustment bolts are respectively inserted into the three through holes and connected to the threaded holes of the fixing member. The three compression springs are respectively sleeved on the three adjustment bolts, and the two ends of each compression spring are respectively connected to the fixing member and the engine housing. When adjusting the position of the optical element, the optical element can be adjusted with different degrees of freedom by rotating at least one of the three adjustment bolts.

[0004] However, the adjustment accuracy of the above-mentioned adjustment mechanism is low, which increases the difficulty of adjusting the position of the optical element, thereby increasing the difficulty of assembling the optical engine and reducing the production efficiency of the laser projection display device. Summary of the invention

[0005] The embodiment of the present application provides a laser projection display device, which can solve the technical problems in the related art that the adjustment accuracy of the adjustment mechanism is low, which increases the difficulty of adjusting the position of the optical element, thereby increasing the difficulty of assembling the optical engine and reducing the production efficiency of the laser projection display device.

[0006] The embodiment of the present application provides a laser projection display device, including an optical engine, which is configured to project an image outward, the optical engine including an engine housing, an optical element and an adjustment mechanism, the engine housing is configured with a accommodating cavity; the optical element is located in the accommodating cavity; the adjustment mechanism is connected to the optical element and is configured to adjust the position of the optical element; wherein the adjustment mechanism includes a fixing member, a displacement adjustment component and a first adjustment member, the fixing member is connected to the optical element; the displacement adjustment component is configured to adjust the displacement of the fixing member and the optical element along a first axis; the first adjustment member is rotatably connected to the engine housing around the first axis, and has a contact with the fixing member. The first limiting surface and the second limiting surface are both partial spherical surfaces whose axes are located on the first axis; the first adjusting member is provided with a first pushing surface that intersects with and is not perpendicular to the first axis; the fixing member has two first abutting portions of equal length on the side facing the first adjusting member, and the two first abutting portions are both in abutment with the first pushing surface; when the first adjusting member rotates relative to the shell and limits the fixing member and the optical element from rotating around the first axis, the first pushing surface pushes the two first abutting portions, and under the limiting action of the first limiting surface and the second limiting surface, the fixing member and the optical element rotate around a second axis that is perpendicular to and intersects the first axis.

[0007] The laser projection display device of the embodiment of the present application is provided with a first adjustment member between the engine housing and the fixing member connected with the optical element, the first adjustment member is connected to the engine housing for rotation around the first axis, and a first limiting surface and a second limiting surface are provided between the first adjustment member and the fixing member, and the first limiting surface and the second limiting surface are both partial spherical surfaces with the center of the sphere located on the first axis. A first pushing surface intersecting and not perpendicular to the first axis and two first abutting columns abutting against the first pushing surface are also provided between the first adjustment member and the second adjustment member. When the first adjustment member is rotated and the fixing member is restricted from rotating around the first axis, the first pushing surface pushes the two first abutting portions, and the second limiting surface rotates relative to the first limiting surface, so that the fixing member and the optical element rotate around the second axis perpendicular to and intersecting the first axis. Since the second axis intersects the first axis, when the displacement of the fixing member and the optical element along the first axis is adjusted, the rotation angle of the fixing member and the optical element around the second axis will not be affected, thereby improving the adjustment accuracy of the adjustment mechanism, reducing the adjustment difficulty of the optical element, reducing the assembly difficulty of the optical engine, and improving the production efficiency of the laser projection display device.

[0008] In some embodiments of the present application, the first adjusting member is located between a side wall of the engine housing and the fixing member, a first groove or a first protrusion is provided on a side of the first adjusting member facing the fixing member, and a first limiting surface is provided on the circumferential side of the first groove or the first protrusion around the first axis; the first pushing surface is provided on the bottom of the first groove or the end of the first protrusion; the fixing member has a first protrusion accommodated in the first groove or a first groove sleeved on the first protrusion on a side facing the first adjusting member, and a second limiting surface in contact with the first limiting surface is provided on the circumferential side of the first protrusion or the first groove; two first abutting portions are provided on the end of the first protrusion or the bottom of the first groove, and the two first abutting portions are respectively located on both sides of the first axis;

[0009] In this way, the first adjustment member is connected to the side wall of the engine housing for rotation around the first axis, a first groove is provided between the first adjustment member and the fixing member, and a first protrusion is accommodated in the first groove, and a first limiting surface and a second limiting surface are provided between the first groove and the first protrusion, and the first limiting surface and the second limiting surface are both partial spherical surfaces with the center of the sphere on the first axis. The bottom of the first groove of the first adjustment member or the end of the first protrusion is provided with a first pushing surface that intersects with the first axis and is not perpendicular to the first axis, and the end of the first protrusion or the bottom of the first groove located on the side of the fixing member facing the first adjustment member is provided with two first abutting portions of equal length, and the two first abutting portions are respectively located on both sides of the first axis and abut against the first pushing surface. When a rotational force is applied to the first adjustment member and the fixing member is restricted from rotating around the first axis, the first pushing surface of the first adjustment member rotates relative to the first axis and pushes the two first abutting portions, so that the distance between one of the first abutting portions and the side wall is reduced, and the distance between the other first abutting portion and the side wall is increased, so that the fixing member and the optical element rotate around the second axis perpendicular to the first axis. Due to the limiting effect between the first limiting surface and the second limiting surface, the second axis passes through the center of the sphere located on the first axis, so that the second axis intersects with the first axis. In this way, when the displacement of the fixing member and the optical element along the first axis is adjusted, the rotation angle of the fixing member and the optical element around the second axis will not be affected, thereby improving the adjustment accuracy of the adjustment mechanism, reducing the adjustment difficulty of the optical element, reducing the assembly difficulty of the optical engine, and improving the production efficiency of the laser projection display device.

[0010] In some embodiments of the present application, the adjustment mechanism further includes a second adjustment member, the second adjustment member is located between the first adjustment member and the fixing member, the first protrusion or the first groove is provided on the side of the second adjustment member facing the first adjustment member; the second adjustment member is provided with a second groove or a second protrusion on the side facing the fixing member, and the second groove or the second protrusion is provided with a third limiting surface on the circumferential side around the first axis; the bottom of the second groove or the end of the second protrusion is provided with a second pushing surface, and the second pushing surface is rotated 90° around the first axis relative to the first pushing surface;

[0011] The fixing member has a second protrusion accommodated in the second groove or a second groove sleeved on the second protrusion on one side facing the second adjusting member, and a fourth limiting surface in contact with the third limiting surface is provided on the circumferential side of the second protrusion or the second groove, and both the third limiting surface and the fourth limiting surface are second partial spherical surfaces with the center of the sphere located on the first axis; two second abutting portions of equal length are provided at the end of the second protrusion or the bottom of the second groove, and the two second abutting portions are respectively located on both sides of the first axis and abut against the second pushing surface;

[0012] Among them, when the first adjusting member and the second adjusting member are rotated synchronously and the fixing member is restricted from rotating around the first axis, the second pushing surface pushes the two second abutting parts, and the third limiting surface and the fourth limiting surface rotate relative to each other, so that the fixing member and the optical element rotate around a third axis that is perpendicular to and intersects with the first axis and is perpendicular to the second axis.

[0013] In this way, a matching first groove and a first protrusion are set between the second adjustment member connected to the fixing member and the first adjustment member. When the first adjustment member is rotated, the rotation of the second adjustment member and the fixing member around the first axis is restricted to adjust the rotation angle of the optical element around the second axis.

[0014] In addition, a second groove and a second protrusion accommodated in the second groove are provided between the second adjusting member and the fixing member, and a third limiting surface and a fourth limiting surface are provided between the second groove and the second protrusion, and the third limiting surface and the fourth limiting surface are both second partial spherical surfaces whose center is on the first axis. A second pushing surface intersecting and not perpendicular to the first axis is provided at the bottom of the second groove of the second adjusting member or the end of the second protrusion, and two second abutting portions of equal length are provided at the end of the second protrusion of the fixing member or the bottom of the second groove, and the two second abutting portions are respectively located on both sides of the first axis and abut against the second pushing surface. When a rotational force is applied to the first adjusting member and the second adjusting member simultaneously and the rotation of the fixing member around the first axis is restricted, the second pushing surface of the second adjusting member rotates relative to the first axis and pushes the two second abutting portions, so that the distance between one of the second abutting portions and the side wall is reduced, and the distance between the other second abutting portion and the side wall is increased, so that the fixing member and the optical element rotate around the third axis perpendicular to the first axis. And due to the limiting effect between the third limiting surface and the fourth limiting surface, the third axis passes through the center of the sphere located on the first axis, so that the third axis intersects with the first axis. And because the second pushing surface rotates 90° around the first axis relative to the first pushing surface, the third axis is perpendicular to the second axis. In this way, when the displacement of the fixing part and the optical element along the first axis is adjusted, the rotation angle of the fixing part and the optical element around the third axis will not be affected, thereby further improving the adjustment accuracy of the adjustment mechanism, reducing the difficulty of adjusting the optical element, reducing the difficulty of assembling the optical engine, and improving the production efficiency of the laser projection display device.

[0015] In some embodiments of the present application, the first adjusting member is provided with the first groove on the side facing the fixing member, and the first limiting notch is provided on the circumferential side of the first groove towards the second adjusting member; the second adjusting member is provided with the first protrusion on the side facing the first adjusting member, and the first limiting protrusion is provided on the circumferential side of the first protrusion, and the first limiting protrusion is inserted into the first limiting notch.

[0016] In this way, when the first pushing surface pushes the first abutment portion, so that during the relative rotation of the first adjustment member and the second adjustment member, the first limiting notch can limit the first limiting protrusion to limit the rotation range of the second adjustment member, thereby limiting the rotation angle of the optical element around the second axis, thereby preventing the position of the optical element from deviating too much.

[0017] In addition, the first limiting protrusion is inserted into the first limiting notch, and the second adjusting member can be rotated or limited by the first limiting protrusion, thereby improving the convenience of operating the second adjusting member.

[0018] In some embodiments of the present application, the second adjusting member is provided with the second groove on the side facing the fixing member, and the circumferential side of the second groove is provided with a second limiting notch facing the fixing member; the fixing member is provided with the second protrusion on the side facing the second adjusting member, and the circumferential side of the second protrusion is provided with a second limiting protrusion, and the second limiting protrusion is inserted into the second limiting notch.

[0019] In this way, when the second pushing surface pushes the second abutment portion, so that during the relative rotation of the second adjusting member and the fixing member, the second limiting notch can limit the second limiting protrusion to limit the rotation range of the fixing member, thereby limiting the rotation angle of the optical element around the third axis, thereby preventing the position of the optical element from deviating too much.

[0020] In addition, the second limiting protrusion is inserted into the second limiting notch, and the fixing member can be limited by the second limiting protrusion. The position of the fixing member can also be adjusted by the second limiting protrusion during the assembly of the adjustment mechanism, so that the fixing member is in the initial position, which improves the convenience of operating the fixing member.

[0021] In some embodiments of the present application, one of the first adjustment member and the side wall is provided with a cylindrical connecting protrusion, the axis of the cylindrical connecting protrusion is the first axis; the other is provided with an annular connecting groove, and the annular connecting groove is sleeved on the cylindrical connecting protrusion.

[0022] With such arrangement, the first adjustment member and the side wall of the engine housing are connected in rotation about the first axis through the cylindrical connecting protrusions and the annular connecting grooves that are socketed with each other, so that the connection structure between the first adjustment member and the engine housing is relatively simple, thereby reducing the difficulty of installation and adjustment between the first adjustment member and the engine housing.

[0023] In some embodiments of the present application, a first operating portion is provided on the outer side of the first adjusting member, and the first adjusting member is rotated by the first operating portion.

[0024] Such an arrangement improves the convenience when rotating the first adjusting member, thereby increasing the difficulty of adjusting the optical element.

[0025] In some embodiments of the present application, the side wall is provided with a first through hole, the axis of the first through hole coincides with the first axis; the first adjusting member is provided with a second through hole, the second through hole is opposite to the first through hole; the second adjusting member is provided with a third through hole, the third through hole is opposite to the second through hole; the fixing member is provided with a threaded hole on the side facing the second adjusting member; the adjustment mechanism also includes an adjustment bolt and a compression elastic member, the adjustment bolt is sequentially inserted into the first through hole, the second through hole and the third through hole, and connected to the threaded hole; the compression elastic member is located between the first adjusting member and the side wall, the two ends of the compression elastic member are respectively abutted against the side wall and the first adjusting member, and a thrust is applied to the side wall and the first adjusting member, so that the end cap of the adjustment bolt abuts against the side wall, and the first adjusting member, the second adjusting member and the fixing member abut against each other; wherein, when the adjustment bolt is rotated, the fixing member moves along the first axis under the thrust of the compression elastic member.

[0026] With such a configuration, the axes of the adjustment bolts sequentially inserted into the first through hole, the second through hole, and the third through hole can coincide with the first axis and be threadedly connected to the fixing member. The compression elastic member applies a thrust to the first adjustment member and the side wall of the engine housing, so that the first adjustment member, the second adjustment member, and the fixing member abut against each other, and the end cap of the adjustment bolt abuts against the side wall. When the adjustment bolt is rotated, the fixing member and the optical element connected to the fixing member can be moved along the first axis, thereby adjusting the displacement of the optical element along the first axis.

[0027] In some embodiments of the present application, a rotation limiting portion is provided on the bottom surface of the engine housing adjacent to the side wall, and the rotation limiting portion abuts against the fixing member on the side facing away from the bottom surface, and the rotation limiting portion limits the rotation of the fixing member around the first axis.

[0028] With such an arrangement, the rotation limit portion can limit the rotation of the fixing member around the first axis, so that during the adjustment of the optical element, there is no need to manually limit the rotation of the fixing member and the optical element around the first axis, thereby improving the convenience and adjustment accuracy when adjusting the position of the fixing member and the optical element.

[0029] In some embodiments of the present application, the engine housing is provided with an adjustment through hole, the adjustment through hole is opposite to the adjustment mechanism, and a packaging sheet is provided on the upper cover of the adjustment through hole.

[0030] With such a configuration, after the optical engine is assembled, the packaging sheet can be removed to adjust the adjustment mechanism again by adjusting the through hole. For example, after the optical engine is lit, the position of the optical element can be adjusted again by the adjustment mechanism according to the image projected by the optical engine to improve the image quality of the optical engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the implementation methods in the embodiments of the present application or the related technologies, the following is a brief introduction to the drawings required for use in the embodiments or the related technology descriptions. Obviously, the drawings described below are some embodiments of the present application, and a person skilled in the art can also obtain other drawings based on these drawings.

[0032] Figure 1 Schematic diagram of the structure of the adjustment mechanism in the related technology Figure 1 ;

[0033] Figure 2 for Figure 1 Schematic diagram of the structure of the adjustment mechanism Figure 2 ;

[0034] Figure 3 This is a schematic diagram of the structure of the optical engine in the first embodiment of the present application;

[0035] Figure 4 for Figure 3 Schematic diagram of the exploded structure of the optical engine;

[0036] Figure 5 Some possible implementations of the first embodiment of this application Figure 4 A local enlarged schematic diagram of the middle A;

[0037] Figure 6 for Figure 5 Schematic diagram of the three-dimensional structure of the middle adjustment mechanism;

[0038] Figure 7 for Figure 6 A schematic diagram of the exploded structure of the adjustment mechanism from the first perspective;

[0039] Figure 8 for Figure 7 A schematic diagram of the exploded structure of the middle adjustment mechanism from a second perspective;

[0040] Fig. 9 for Figure 5 A schematic diagram of the front view structure of the middle adjustment mechanism;

[0041] Fig.10 for Fig. 9 Schematic diagram of the cross-sectional structure along the BB direction;

[0042] Fig.11 It is a partial enlarged schematic diagram of point A in some other possible implementations of the first embodiment of the present application;

[0043] Fig.12 for Fig.11 Schematic diagram of the three-dimensional structure of the middle adjustment mechanism;

[0044] Fig.13 for Fig.12 A schematic diagram of the exploded structure of the adjustment mechanism from the first perspective;

[0045] Fig.14 for Fig.12 A schematic diagram of the exploded structure of the middle adjustment mechanism from a second perspective;

[0046] Fig.15 for Fig.11 A schematic diagram of the front view structure of the middle adjustment mechanism;

[0047] Fig.16 for Fig.15 Schematic diagram of the cross-sectional structure in the CC direction;

[0048] Fig.17 for Fig.11 Schematic diagram of the three-dimensional structure of the fixing part Figure 1 ;

[0049] Fig.18 for Fig.17 Schematic diagram of the three-dimensional structure of the fixing part Figure 2 ;

[0050] Fig.19 for Fig.11 Schematic diagram of the three-dimensional structure of the first adjusting member Figure 1 ;

[0051] Fig. 20 for Fig.19 Schematic diagram of the three-dimensional structure of the first adjusting member Figure 2 ;

[0052] Fig.21 for Fig.11 Schematic diagram of the three-dimensional structure of the second adjusting member Figure 1 ;

[0053] Fig. 22 for Fig.21 Schematic diagram of the three-dimensional structure of the second adjusting member Figure 2 ;

[0054] Fig.23 This is a structural schematic diagram of the adjustment mechanism in the second embodiment of the present application;

[0055] Fig.24 for Fig.23 A schematic diagram of the front view structure of the middle adjustment mechanism;

[0056] Fig.25 for Fig.24 Schematic diagram of the cross-sectional structure along the DD direction.

[0057] Description of reference numerals:

[0058] 100-engine housing;

[0059] 110- bottom shell; 111- side wall;

[0060] 112- cylindrical connecting protrusion; 113- receiving groove;

[0061] 114-first through hole; 120-cover plate;

[0062] 121-adjusting through hole; 122-packaging sheet;

[0063] 130-rotation limiting portion;

[0064] 200-reflector;

[0065] 300-adjustment mechanism;

[0066] 310-fixing member; 311-fixing portion;

[0067] 312-mounting slot; 313-adjustment portion;

[0068] 314- second protrusion; 315- fourth limiting surface;

[0069] 316-second abutting portion; 317-second limiting protruding portion;

[0070] 318-threaded hole; 320-displacement adjustment component;

[0071] 321-adjusting bolt; 322-compression elastic member;

[0072] 330-first adjustment member; 331-cylindrical connecting groove;

[0073] 332-first groove; 333-first limiting surface;

[0074] 334-first pushing surface; 335-first operating portion;

[0075] 336-first limiting notch; 337-second through hole;

[0076] 340 - second adjustment member; 341 - first protrusion;

[0077] 342-second limiting surface; 343-first abutting portion;

[0078] 344-second groove; 345-third limiting surface;

[0079] 346-second pushing surface; 347-first limiting protrusion;

[0080] 348 - second limiting notch; 349 - third through hole. DETAILED DESCRIPTION

[0081] refer to Figure 1 and Figure 2 In the related art, the adjustment mechanism usually includes a fixing member 110', three adjustment bolts 120' and three compression springs 130'. The fixing member 110' is located in the engine housing 100', and the optical element 140' to be adjusted is fixedly connected to the fixing member 110'. Three connecting columns 111' are arranged on the side of the fixing member 110' facing the engine housing 100'. The three connecting columns 111' are arranged in a right triangle, that is, the line connecting the center lines of the three connecting columns 111' is arranged to form a right triangle. One right-angled side of the right triangle is arranged along the m direction, and the other right-angled side of the right triangle is arranged along the n direction. Each connecting column 111' is provided with a threaded hole 112'. The engine housing 100' is provided with three through holes corresponding to the three connecting columns 111'. The three adjustment bolts 120' are respectively inserted into the three through holes, and the threaded end of each adjustment bolt 120' is connected to the threaded hole 112'. The three compression springs 130' are respectively mounted on the three connected adjustment bolts 120' and the connection column 111'. Both ends of each compression spring 130' abut against the fixing member 110' and the engine housing 100' to apply thrust to the fixing member 110' and the engine housing 100'.

[0082] When a certain adjusting bolt 120' is rotated, the compression spring 130' applies thrust to the fixing member 110' and the engine housing 100', so that the connecting column 111' threadedly connected to the adjusting bolt 120' moves relative to the engine housing 100' along the axial direction of the adjusting bolt 120'. By rotating different adjusting bolts 120', the relative distances between the three connecting columns 111' and the engine housing 100' can be adjusted, thereby adjusting the optical element 140' with different degrees of freedom. For example, referring to Figure 2 When the adjustment bolt 120' on the left is rotated, the angle of the optical element 140' around the n direction can be adjusted. When the adjustment bolt 120' on the upper right side is rotated, the angle of the optical element 140' around the m direction can be adjusted. When the three adjustment bolts 120' are rotated in the same direction and amount, the displacement of the optical element 140' along the l direction can be adjusted.

[0083] However, the adjustment precision of the adjustment mechanism in the related art is low, which increases the difficulty of adjusting the position of the optical element, thereby increasing the difficulty of assembling the optical engine and reducing the production efficiency of the laser projection display device. The inventors have found that the reason is that when the adjustment bolt 120' is rotated to adjust a certain degree of freedom of the optical element 140' to be adjusted, it usually affects the other degrees of freedom of the fixing member 110' and the optical element 140' to be adjusted. In particular, when the displacement of the optical element 140' along the l direction is adjusted, it is difficult to avoid affecting the angle of the optical element 140' around the m direction and the angle around the n direction, which increases the position uncertainty of the optical element 140', thereby increasing the difficulty of adjusting the position of the optical element 140', and further increasing the difficulty of assembling the optical engine, and reducing the production efficiency of the laser projection display device.

[0084] In view of this, the adjustment mechanism in the laser projection display device of the embodiment of the present application is provided by setting a first adjustment member between the engine housing and the fixing member connected to the optical element, the first adjustment member is connected to the engine housing around the first axis, and a first limiting surface and a second limiting surface are provided between the first adjustment member and the fixing member so as to contact each other, and the first limiting surface and the second limiting surface are both first partial spherical surfaces whose centers are located on the first axis. A first pushing surface that intersects and is not perpendicular to the first axis, and two first abutting columns that abut against the first pushing surface are also provided between the first adjustment member and the second adjustment member. When the first adjustment member is rotated and the fixing member is restricted from rotating around the first axis, the first pushing surface pushes the two first abutting portions, and the second limiting surface rotates relative to the first limiting surface, so that the fixing member and the optical element rotate around the second axis that is perpendicular to and intersects the first axis. Since the second axis intersects with the first axis, when the displacement of the fixing part and the optical element along the first axis is adjusted, the rotation angle of the fixing part and the optical element around the second axis will not be affected, thereby improving the adjustment accuracy of the adjustment mechanism, reducing the adjustment difficulty of the optical element, reducing the assembly difficulty of the optical engine, and improving the production efficiency of the laser projection display device.

[0085] In order to make the purpose, implementation mode and advantages of the present application clearer, the exemplary implementation mode of the present application will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0086] It should be noted that the brief description of terms in this application is only for the convenience of understanding the embodiments described below, and is not intended to limit the embodiments of this application. Unless otherwise specified, these terms should be understood according to their common and usual meanings.

[0087] In addition, the terms "include" and "have" and any variations thereof are intended to cover but not exclude inclusion, for example, a product or device comprising a list of components is not necessarily limited to those components expressly listed but may include other components not expressly listed or inherent to such products or devices.

[0088] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0089] The terms "first", "second", "third", "fourth", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", "third", "fourth", etc. may explicitly or implicitly include one or more of the feature. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0090] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0091] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0092] First embodiment

[0093] The first embodiment of the present application provides a laser projection display device. The laser projection display device includes an optical engine, which is configured to project an image outward. Exemplarily, the optical engine may include an engine housing, a light source, an illumination system, a digital micromirror device (DMD) and a projection system. The engine housing is configured with a receiving cavity, and the light source, the illumination system, the DMD and the projection system are located in the receiving cavity. Exemplarily, refer to Figure 3 and Figure 4 The engine housing 100 may be a split structure, for example, it may include a detachably connected bottom shell 110 and a cover plate 120, and the cover plate 120 and the bottom shell 110 are arranged to form a receiving cavity. The light source, the lighting system and the projection system may include a plurality of optical elements. The laser emitted by the light source is irradiated onto the DMD through the lighting system and modulated into an image by the DMD, and the modulated image is projected outward through the projection system for the user to watch.

[0094] refer to Figure 4 and Figure 5 The laser projection display device of the embodiment of the present application also includes an adjustment mechanism 300, which is connected to the optical element and is used to adjust the position of the optical element. The multiple optical elements usually include a reflector 200, and the reflector 200 uses the law of reflection of light to change the propagation direction of the laser. The relative angle between the reflector 200 and the light source determines the reflection angle of the laser. Therefore, the position accuracy of the reflector 200 has a great influence on the accuracy of the optical path in the optical engine. The technical solution of the adjustment mechanism 300 is explained below by taking the optical element as the reflector 200 as an example. It can be understood that the optical element can also be other optical elements, such as a prism, etc., which will not be described in detail in the embodiment of the present application.

[0095] refer to Figures 6 to 16The adjustment mechanism 300 may include a fixing member 310, a displacement adjustment assembly 320 and a first adjustment member 330, wherein the fixing member 310 is connected to the reflector 200. The displacement adjustment assembly 320 is configured to adjust the displacement of the fixing member 310 and the reflector 200 along the first axis x. The first adjustment member 330 is rotationally connected to the engine housing 100 around the first axis x, and has a first limiting surface 333 and a second limiting surface 342 in contact with the fixing member 310, and the first limiting surface 333 and the second limiting surface 342 are both partial spherical surfaces whose axes are located on the first axis x. The first adjustment member 330 is provided with a first pushing surface 334 that intersects with the first axis x and is not perpendicular to it. The fixing member 310 has two first abutting portions 343 of equal length on one side facing the first adjustment member 330, and the two first abutting portions 343 are both in abutment with the first pushing surface 334. When the first adjusting member 330 rotates relative to the shell and limits the fixing member 310 and the reflector 200 from rotating around the first axis x, the first pushing surface 334 pushes the two first abutting portions 343, and under the limiting action of the first limiting surface 333 and the second limiting surface 342, the fixing member 310 and the reflector 200 rotate around the second axis y that is perpendicular to and intersects the first axis x.

[0096] The laser projection display device of the embodiment of the present application is provided with a first adjustment member 330 between the engine housing 100 and the fixing member 310 connected to the reflector 200, the first adjustment member 330 is connected to the engine housing 100 for rotation around the first axis x, and a first limiting surface 333 and a second limiting surface 342 are provided between the first adjustment member 330 and the fixing member 310 for contacting each other, and the first limiting surface 333 and the second limiting surface 342 are both partial spherical surfaces with the center of the sphere located on the first axis x. A first pushing surface 334 intersecting and not perpendicular to the first axis x, and two first abutting columns abutting against the first pushing surface 334 are also provided between the first adjustment member 330 and the second adjustment member 340. When the first adjustment member 330 is rotated and the fixing member 310 is restricted from rotating around the first axis x, the first pushing surface 334 pushes the two first abutting portions 343, and the second limiting surface 342 rotates relative to the first limiting surface 333, so that the fixing member 310 and the reflector 200 rotate around the second axis y perpendicular to and intersecting the first axis x. Since the second axis y intersects the first axis x, when the displacement of the fixing member 310 and the reflector 200 along the first axis x is adjusted, the rotation angle of the fixing member 310 and the reflector 200 around the second axis y will not be affected, thereby improving the adjustment accuracy of the adjustment mechanism 300, reducing the adjustment difficulty of the reflector 200, reducing the assembly difficulty of the optical engine, and improving the production efficiency of the laser projection display device.

[0097] The fixing member 310 is used to connect the reflector 200. For example, continue to refer to Fig.17 and Fig.18The fixing member 310 may include a fixing portion 311 and an adjusting portion 313 connected to each other. The fixing portion 311 may be provided with a mounting groove 312, and the reflector 200 is mounted in the mounting groove 312. For example, the reflector 200 may be fixed in the mounting groove 312 by dispensing glue or spring clips. The adjusting portion 313 is used to cooperate with the first adjusting member 330 and the displacement adjusting assembly 320 to adjust the position of the fixing member 310 and the reflector 200.

[0098] The first adjustment member 330 is located between the side wall 111 of the engine housing 100 and the fixing member 310, and is connected to the side wall 111 for rotation around the first axis x. For example, one of the first adjustment member 330 and the side wall 111 is provided with a cylindrical connection protrusion 112, and the axis of the cylindrical connection protrusion 112 is the first axis x. The other is provided with a circular connection groove, and the circular connection groove is sleeved on the cylindrical connection protrusion 112. For example, referring to Figure 7 , Figure 8 , Fig.10 ,as well as Fig.13 , Fig.14 , and refer to Fig.19 and Fig. 20 , the side wall 111 may be provided with a cylindrical connection protrusion 112, and the axis of the cylindrical connection protrusion 112 is the first axis x. The first adjustment member 330 is provided with a cylindrical connection groove 331 sleeved on the cylindrical connection protrusion 112. The first adjustment member 330 and the side wall 111 of the engine housing 100 are connected to each other by the cylindrical connection protrusion 112 and the annular connection groove to realize the rotation connection around the first axis x, so that the connection structure between the first adjustment member 330 and the engine housing 100 is relatively simple, which reduces the difficulty of assembly and adjustment between the first adjustment member 330 and the engine housing 100.

[0099] The first adjusting member 330 may be provided with a first groove 332 on one side facing the fixing member 310, and the first groove 332 may be provided with a first limiting surface 333 on the circumferential side around the first axis x. A first pushing surface 334 is provided at the bottom of the first groove 332, and the first pushing surface 334 intersects with the first axis x and is not perpendicular. Fig.19 As shown, the first pushing surface 334 may be inclined at left and right sides relative to a plane perpendicular to the first axis x.

[0100] The fixing member 310 has a first protrusion 341 on one side facing the first adjusting member 330 and received in the first groove 332. For example, in some possible implementations of the present application, referring to Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.10, the first protrusion 341 can be arranged on the fixing member 310, and is located on the adjustment portion 313 of the fixing member 310 facing the first adjustment member 330. The circumferential side of the first protrusion 341 is provided with a second limiting surface 342 in contact with the first limiting surface 333, and the second limiting surface 342 and the first limiting surface 333 can both be first partial spherical surfaces, and the center S1 of the first partial spherical surface is located on the first axis x. The end of the first protrusion 341 can be provided with two first abutting portions 343 of equal length, and the two first abutting portions 343 are respectively located on both sides of the first axis x, and both abut against the first pushing surface 334. When the first adjustment member 330 is rotated and the fixing member 310 is restricted from rotating around the first axis x, the first pushing surface 334 pushes the two first abutting portions 343, and the second limiting surface 342 rotates relative to the first limiting surface 333, so that the fixing member 310 and the reflector 200 rotate around the second axis y that is perpendicular to and intersects the first axis x.

[0101] When a rotational force is applied to the first adjustment member 330 and the rotation of the fixing member 310 around the first axis x is restricted, the first pushing surface 334 of the first adjustment member 330 rotates relative to the first axis x and pushes the two first abutting portions 343, so that the distance between one of the first abutting portions 343 and the side wall 111 decreases, and the distance between the other first abutting portion 343 and the side wall 111 increases, so that the fixing member 310 and the reflector 200 rotate around the second axis y perpendicular to the first axis x. In this way, the adjustment mechanism 300 can adjust the reflector 200 in two degrees of freedom, namely, the displacement along the first axis x and the angle around the second axis y.

[0102] Due to the limiting effect between the first limiting surface 333 and the second limiting surface 342, the second axis y passes through the center of the sphere located on the first axis x, so that the second axis y intersects with the first axis x. This makes it possible to adjust the displacement of the fixing member 310 and the reflector 200 along the first axis x without affecting the rotation angle of the fixing member 310 and the reflector 200 around the second axis y, thereby improving the adjustment accuracy of the adjustment mechanism 300, reducing the adjustment difficulty of the reflector 200, reducing the assembly difficulty of the optical engine, and improving the production efficiency of the laser projection display device.

[0103] In some other possible implementations of the embodiments of the present application, refer to Fig.11 , Fig.12 , Fig.13 , Fig.14 , Fig.15 and Fig.16The adjustment mechanism 300 may further include a second adjustment member 340, and the second adjustment member 340 is located between the first adjustment member 330 and the fixing member 310. That is, the second adjustment member 340 is located on the side of the fixing member 310 facing the first adjustment member 330. The first protrusion 341 may be provided on the second adjustment member 340, and is located at one end of the second adjustment member 340 facing the first adjustment member 330. A first groove 332 and a first protrusion 341 that match each other are provided between the first adjustment member 330 and the second adjustment member 340 connected to the fixing member 310. When the first adjustment member 330 is rotated and the rotation of the second adjustment member 340 and the fixing member 310 around the first axis x is restricted, the rotation angle of the reflector 200 around the second axis y can be adjusted, and this will not be described in detail in the embodiment of the present application.

[0104] The side of the second adjusting member 340 facing away from the first adjusting member 330 can be connected to the fixing member 310. Exemplarily, the second adjusting member 340 is provided with a second groove 344 on the side facing the fixing member 310, and the second groove 344 is provided with a third limiting surface 345 on the circumferential side around the first axis x. The bottom of the second groove 344 is provided with a second pushing surface 346, and the second pushing surface 346 rotates 90° around the first axis x relative to the first pushing surface 334. The fixing member 310 has a second protrusion 314 accommodated in the second groove 344 on the side facing the second adjusting member 340, and the circumferential side of the second protrusion 314 is provided with a fourth limiting surface 315 in contact with the third limiting surface 345, and the third limiting surface 345 and the fourth limiting surface 315 are both second partial spherical surfaces, and the center S2 of the second partial spherical surface is located on the first axis x. Two second abutting portions 316 of equal length are disposed at the end of the second protrusion 314. The two second abutting portions 316 are respectively located on both sides of the first axis x and are abutted against the second pushing surface 346. When the first adjusting member 330 and the second adjusting member 340 are rotated synchronously and the fixing member 310 is restricted from rotating around the first axis x, the second pushing surface 346 pushes the two second abutting portions 316, and the third limiting surface 345 and the fourth limiting surface 315 rotate relatively, so that the fixing member 310 and the reflector 200 rotate around the third axis z which is perpendicular to and intersects the first axis x and is perpendicular to the second axis y.

[0105] A second groove 344 and a second protrusion 314 accommodated in the second groove 344 are provided between the second adjusting member 340 and the fixing member 310. A third limiting surface 345 and a fourth limiting surface 315 are provided between the second groove 344 and the second protrusion 314. The third limiting surface 345 and the fourth limiting surface 315 are both second partial spherical surfaces with the center of the sphere on the first axis x. A second pushing surface 346 intersecting with and not perpendicular to the first axis x is provided at the bottom of the second groove 344 of the second adjusting member 340. Two second abutting portions 316 of equal length are provided at the end of the second protrusion 314 of the fixing member 310. The two second abutting portions 316 are respectively located on both sides of the first axis x and abut against the second pushing surface 346. When the rotational force is applied to the first adjustment member 330 and the second adjustment member 340 simultaneously and the rotation of the fixing member 310 around the first axis x is restricted, the second pushing surface 346 of the second adjustment member 340 rotates relative to the first axis x and pushes the two second abutting portions 316, so that the distance between one of the second abutting portions 316 and the side wall 111 is reduced, and the distance between the other second abutting portion 316 and the side wall 111 is increased, so that the fixing member 310 and the reflector 200 rotate around the third axis z perpendicular to the first axis x. And because the second pushing surface 346 rotates 90° around the first axis x relative to the first pushing surface 334, the third axis z is perpendicular to the second axis y. In this way, the adjustment mechanism 300 can adjust the reflector 200 in three degrees of freedom, namely, the displacement along the first axis x, the angle around the second axis y, and the angle around the third axis z.

[0106] In addition, due to the limiting effect between the third limiting surface 345 and the fourth limiting surface 315, the third axis z passes through the center of the sphere located on the first axis x, so that the third axis z intersects with the first axis x. In this way, when the displacement of the fixing member 310 and the reflector 200 along the first axis x is adjusted, the rotation angle of the fixing member 310 and the reflector 200 around the third axis z will not be affected, thereby further improving the adjustment accuracy of the adjustment mechanism 300, reducing the adjustment difficulty of the reflector 200, reducing the assembly difficulty of the optical engine, and improving the production efficiency of the laser projection display device.

[0107] By way of example, and with reference to Fig.19 and Fig. 20 The first adjustment member 330 may be provided with a first operating portion 335 on the outer side thereof, and the first adjustment member 330 may be rotated by the first operating portion 335. This configuration improves the convenience of rotating the first adjustment member 330, thereby improving the difficulty of adjusting the reflector 200. Fig.21 and Fig. 22The first adjusting member 330 is provided with a first groove 332 on one side facing the fixing member 310, and a first limiting notch 336 facing the second adjusting member 340 may be provided on the circumferential side of the first groove 332. The second adjusting member 340 is provided with a first protrusion 341 on one side facing the first adjusting member 330, and a first limiting protrusion 347 is provided on the circumferential side of the first protrusion 341, and the first limiting protrusion 347 is penetrated in the first limiting notch 336.

[0108] When the first pushing surface 334 pushes the first abutting portion 343 to make the first adjusting member 330 and the second adjusting member 340 rotate relative to each other, the first limiting notch 336 can limit the first limiting protrusion 347 to limit the rotation range of the second adjusting member 340, thereby limiting the angle of rotation of the reflector 200 around the second axis y, thereby preventing the position of the reflector 200 from being too far off. In addition, the first limiting protrusion 347 is inserted into the first limiting notch 336, and the second adjusting member 340 can also be rotated or limited by the first limiting protrusion 347, thereby improving the convenience of operating the second adjusting member 340.

[0109] For example, continue to refer to Fig.17 and Fig.18 The second adjusting member 340 is provided with a second groove 344 on one side facing the fixing member 310, and a second limiting notch 348 facing the fixing member 310 is provided on the circumferential side of the second groove 344. The fixing member 310 is provided with a second protrusion 314 on one side facing the second adjusting member 340, and a second limiting protrusion 317 is provided on the circumferential side of the second protrusion 314, and the second limiting protrusion 317 is penetrated in the second limiting notch 348.

[0110] When the second push surface 346 pushes the second abutment portion 316 to make the second adjustment member 340 and the fixing member 310 rotate relative to each other, the second limiting notch 348 can limit the second limiting protrusion 317 to limit the rotation range of the fixing member 310, thereby limiting the angle of rotation of the reflector 200 around the third axis z, thereby preventing the position of the reflector 200 from being too deviated. In addition, the second limiting protrusion 317 is inserted into the second limiting notch 348, and the fixing member 310 can also be limited by the second limiting protrusion 317. The position of the fixing member 310 can also be adjusted by the second limiting protrusion 317 during the assembly of the adjustment mechanism 300, so that the fixing member 310 is in the initial position, which improves the convenience of operating the fixing member 310.

[0111] For example, reference Fig.10 and Fig.16The side wall 111 of the engine housing 100 may also be provided with a first through hole 114, and the axis of the first through hole 114 coincides with the first axis x. The first adjustment member 330 is provided with a second through hole 337, and the second through hole 337 is opposite to the first through hole 114. The second adjustment member 340 is provided with a third through hole 349, and the third through hole 349 is opposite to the second through hole 337. The fixing member 310 is provided with a threaded hole 318 on one side facing the second adjustment member 340. The adjustment mechanism 300 may include an adjustment bolt 321 and a compression elastic member 322, and the adjustment bolt 321 is sequentially penetrated into the first through hole 114, the second through hole 337 and the third through hole 349, and connected to the threaded hole 318. The compression elastic member 322 is located between the first adjustment member 330 and the side wall 111. The two ends of the compression elastic member 322 abut against the side wall 111 and the first adjustment member 330 respectively, and apply thrust to the side wall 111 and the first adjustment member 330, so that the end cap of the adjustment bolt 321 abuts against the side wall 111, and the first adjustment member 330, the second adjustment member 340 and the fixing member 310 abut against each other. For example, a receiving groove 113 may be provided on the side of the cylindrical connection protrusion 112 of the side wall 111 facing the first adjustment member 330, and the compression elastic member 322 may be a compression spring, which may be accommodated in the receiving groove 113 and sleeved on the adjustment bolt. One end of the compression spring abuts against the bottom of the receiving groove 113, and the other end abuts against the bottom of the cylindrical connection groove 331. When the adjustment bolt 321 is rotated, the fixing member 310 moves along the first axis x under the thrust of the compression elastic member 322.

[0112] The axis of the adjustment bolt 321 which is sequentially inserted into the first through hole 114, the second through hole 337 and the third through hole 349 can coincide with the first axis x and is threadedly connected to the fixing member 310. The compression elastic member 322 applies a thrust to the first adjustment member 330 and the side wall 111 of the engine housing 100, so that the first adjustment member 330, the second adjustment member 340 and the fixing member 310 abut against each other, and the end cap of the adjustment bolt 321 abuts against the side wall 111. When the adjustment bolt 321 is rotated, the fixing member 310 and the reflector 200 connected to the fixing member 310 can be moved along the first axis x, so that the displacement of the reflector 200 along the first axis x is adjusted.

[0113] For example, reference Figure 5 and Fig.11The bottom surface of the engine housing 100 adjacent to the side wall 111 may be provided with a rotation limiter 130, and the side of the rotation limiter 130 facing away from the bottom surface abuts against the fixing member 310, and the rotation limiter 130 limits the rotation of the fixing member 310 around the first axis x. The rotation limiter 130 can limit the rotation of the fixing member 310 around the first axis x, so that in the process of adjusting the reflector 200, there is no need to manually limit the rotation of the fixing member 310 and the reflector 200 around the first axis x, thereby improving the convenience and adjustment accuracy when adjusting the positions of the fixing member 310 and the reflector 200.

[0114] Exemplarily, the engine housing 100 may also be provided with an adjustment through hole 121, for example, the adjustment through hole 121 may be provided on the cover plate 120. The adjustment through hole 121 is opposite to the adjustment mechanism 300, and a packaging sheet 122 is provided on the adjustment through hole 121. After the optical engine is assembled, the packaging sheet 122 may be removed to adjust the adjustment mechanism 300 again through the adjustment through hole 121. For example, after the optical engine is lit, the position of the reflector 200 may be adjusted again through the adjustment mechanism 300 according to the image projected by the optical engine to improve the image quality of the optical engine.

[0115] To facilitate understanding of the technical solution of the embodiment of the present application, the adjustment process of the reflector 200 in three degrees of freedom is described in detail below.

[0116] refer to Fig.11 and Fig.16 After the assembly of the adjustment mechanism 300 is completed, the adjustment mechanism 300 is in an initial state. First, the rotation of the fixing member 310 and the second adjustment member 340 around the first axis x is limited. Exemplarily, the rotation of the fixing member 310 around the first axis xx can be limited by rotating the limiter. The first limit protrusion 347 and the second limit protrusion 317 can be manually fixed so that the second adjustment member 340 and the fixing member 310 do not rotate relative to each other, so that the second adjustment member 340 can rotate synchronously with the fixing member 310, thereby limiting the rotation of the second adjustment member 340 around the first axis x.

[0117] The first adjustment member 330 can be rotated by the first operating portion 335, so that the first adjustment member 330 rotates around the first axis x relative to the side wall 111 of the engine housing 100. The first pushing surface 334 of the first adjustment member 330 pushes the two first abutting portions 343, so that the distance between one of the first abutting portions 343 and the side wall 111 is reduced, and the distance between the other first abutting portion 343 and the side wall 111 is increased, so that the second adjustment member 340, the fixing member 310 and the reflector 200 rotate around the second axis y perpendicular to the first axis x. Due to the limiting effect between the first limiting surface 333 and the second limiting surface 342, the second axis y passes through the center of the sphere located on the first axis x, so that the second axis y intersects with the first axis x. In this way, the angle of the reflector 200 around the second axis y can be adjusted.

[0118] Then, the first operating part 335 and the first limiting protrusion can be fixed so that the first adjusting member 330 and the second adjusting member 340 can rotate synchronously. Then, the first adjusting member 330 and the second adjusting member 340 are rotated synchronously, and the first adjusting member 330 and the second adjusting member 340 rotate around the first axis x relative to the side wall 111 of the engine housing 100, and the second pushing surface 346 of the second adjusting member 340 pushes the two second abutting portions 316, so that the distance between one of the second abutting portions 316 and the side wall 111 is reduced, and the distance between the other second abutting portion 316 and the side wall 111 is increased, so that the fixing member 310 and the reflector 200 rotate around the third axis z perpendicular to the first axis x. And because the second pushing surface 346 rotates 90° around the first axis x relative to the first pushing surface 334, the third axis z is perpendicular to the second axis y. Due to the limiting effect between the third limiting surface 345 and the fourth limiting surface 315, the third axis z passes through the center of the sphere located on the first axis x, so that the third axis z intersects with the first axis x. In this way, the angle of the reflector 200 around the third axis z can be adjusted.

[0119] Subsequently, the adjusting bolt 321 can be rotated, and the fixing member 310 and the reflector 200 can move relative to the adjusting bolt 321 along the first axis x under the action of the compression elastic member 322, so that the displacement of the reflector 200 along the first axis x can be adjusted. When the displacement of the reflector 200 along the first axis x is adjusted, the rotation angle of the reflector 200 around the second axis y and the rotation angle around the third axis z will not be affected, thereby improving the adjustment accuracy of the adjustment mechanism 300, reducing the difficulty of adjusting the reflector 200, reducing the difficulty of assembling the optical engine, and improving the production efficiency of the laser projection display device.

[0120] After completing the adjustment of the three degrees of freedom of the reflector 200, the first groove 332 and the first protrusion 341, the second groove 344 and the second protrusion 314, and the adjustment bolt 321 can be fixed by dispensing glue or the like to fix the position of the reflector 200 to prevent the reflector 200 from being shifted during subsequent assembly processes.

[0121] Second embodiment

[0122] In the second embodiment of the present application, refer to Fig.23 , Fig.24 and Fig.25 , which is different from the first embodiment of the present application in that: the first adjustment member 330 may be provided with a first protrusion 341 on the side facing the fixing member 310, a first limiting surface 333 is provided on the circumferential side of the first protrusion 341, and a first pushing surface 334 is provided at the end of the first protrusion 341, and the first pushing surface 334 intersects with the first axis x and is not perpendicular. The fixing member 310 has a first groove 332 sleeved on the first protrusion 341 on the side facing the first adjustment member 330. For example, in some possible implementations of the embodiment of the present application, the first groove 332 may be provided on the fixing member 310 and located on the adjustment portion 313 of the fixing member 310 facing the first adjustment member 330. The circumferential side of the first groove 332 is provided with a second limiting surface 342 in contact with the first limiting surface 333, and the second limiting surface 342 and the first limiting surface 333 may both be first partial spherical surfaces, and the center S1 of the first partial spherical surface is located on the first axis x. The bottom of the first groove 332 may be provided with two first abutting portions 343 of equal length, the two first abutting portions 343 are respectively located on both sides of the first axis x, and both abut against the first pushing surface 334. When the first adjusting member 330 is rotated and the fixing member 310 is restricted from rotating around the first axis x, the first pushing surface 334 pushes the two first abutting portions 343, and the second limiting surface 342 rotates relative to the first limiting surface 333, so that the fixing member 310 and the reflector 200 rotate around the second axis y that is perpendicular to and intersects the first axis x.

[0123] When a rotational force is applied to the first adjustment member 330 and the rotation of the fixing member 310 around the first axis x is restricted, the first pushing surface 334 of the first adjustment member 330 rotates relative to the first axis x and pushes the two first abutting portions 343, so that the distance between one of the first abutting portions 343 and the side wall 111 decreases, and the distance between the other first abutting portion 343 and the side wall 111 increases, so that the fixing member 310 and the reflector 200 rotate around the second axis y perpendicular to the first axis x. In this way, the adjustment mechanism 300 can adjust the reflector 200 in two degrees of freedom, namely, the displacement along the first axis x and the angle around the second axis y.

[0124] Due to the limiting effect between the first limiting surface 333 and the second limiting surface 342, the second axis y passes through the center of the sphere located on the first axis x, so that the second axis y intersects with the first axis x. This makes it possible to adjust the displacement of the fixing member 310 and the reflector 200 along the first axis x without affecting the rotation angle of the fixing member 310 and the reflector 200 around the second axis y, thereby improving the adjustment accuracy of the adjustment mechanism 300, reducing the adjustment difficulty of the reflector 200, reducing the assembly difficulty of the optical engine, and improving the production efficiency of the laser projection display device.

[0125] In some other possible implementations of the embodiments of the present application, the adjustment mechanism 300 may further include a second adjustment member 340, and the second adjustment member 340 is located between the first adjustment member 330 and the fixing member 310. That is, the second adjustment member 340 is located on the side of the fixing member 310 facing the first adjustment member 330. The first groove 332 may be provided on the second adjustment member 340, and is located at one end of the second adjustment member 340 facing the first adjustment member 330. A first protrusion 341 and a first groove 332 are provided between the first adjustment member 330 and the second adjustment member 340 connected to the fixing member 310, and when the first adjustment member 330 is rotated and the rotation of the second adjustment member 340 and the fixing member 310 around the first axis x is restricted, the rotation angle of the reflector 200 around the second axis y can be adjusted, and this will not be described in detail in the embodiments of the present application.

[0126] Exemplarily, the second adjusting member 340 may be provided with a second protrusion 314 on the side facing the fixing member 310, and a third limiting surface 345 is provided on the circumferential side of the second protrusion 314 around the first axis x. A second pushing surface 346 is provided at the end of the second protrusion 314, and the second pushing surface 346 rotates 90° around the first axis x relative to the first pushing surface 334. The fixing member 310 has a second groove 344 sleeved on the second protrusion 314 on the side facing the second adjusting member 340, and a fourth limiting surface 315 in contact with the third limiting surface 345 is provided on the circumferential side of the second groove 344, and the third limiting surface 345 and the fourth limiting surface 315 are both second partial spherical surfaces, and the center S2 of the second partial spherical surface is located on the first axis x. Two second abutting portions 316 of equal length are provided at the bottom of the second groove 344, and the two second abutting portions 316 are respectively located on both sides of the first axis x, and both abut against the second pushing surface 346. When the first adjusting member 330 and the second adjusting member 340 are rotated synchronously and the fixing member 310 is restricted from rotating around the first axis x, the second pushing surface 346 pushes the two second abutting portions 316, and the third limiting surface 345 and the fourth limiting surface 315 rotate relative to each other, so that the fixing member 310 and the reflector 200 rotate around the third axis z which is perpendicular to and intersects the first axis x and is perpendicular to the second axis y.

[0127] A second protrusion 314 and a second groove 344 accommodated in the second protrusion 314 are provided between the second adjustment member 340 and the fixing member 310. A third limiting surface 345 and a fourth limiting surface 315 in contact are provided between the second protrusion 314 and the second groove 344. Both the third limiting surface 345 and the fourth limiting surface 315 are second partial spherical surfaces with the center of the sphere on the first axis x. A second pushing surface 346 intersecting and not perpendicular to the first axis x is provided at the end of the second protrusion 314 of the second adjustment member 340. Two second abutting portions 316 of equal length are provided at the bottom of the second groove 344 of the fixing member 310. The two second abutting portions 316 are respectively located on both sides of the first axis x and abut against the second pushing surface 346. When the rotational force is applied to the first adjustment member 330 and the second adjustment member 340 simultaneously and the rotation of the fixing member 310 around the first axis x is restricted, the second pushing surface 346 of the second adjustment member 340 rotates relative to the first axis x and pushes the two second abutting portions 316, so that the distance between one of the second abutting portions 316 and the side wall 111 is reduced, and the distance between the other second abutting portion 316 and the side wall 111 is increased, so that the fixing member 310 and the reflector 200 rotate around the third axis z perpendicular to the first axis x. And because the second pushing surface 346 rotates 90° around the first axis x relative to the first pushing surface 334, the third axis z is perpendicular to the second axis y. In this way, the adjustment mechanism 300 can adjust the reflector 200 in three degrees of freedom, namely, the displacement along the first axis x, the angle around the second axis y, and the angle around the third axis z.

[0128] In addition, due to the limiting effect between the third limiting surface 345 and the fourth limiting surface 315, the third axis z passes through the center of the sphere located on the first axis x, so that the third axis z intersects with the first axis x. In this way, when the displacement of the fixing member 310 and the reflector 200 along the first axis x is adjusted, the rotation angle of the fixing member 310 and the reflector 200 around the third axis z will not be affected, thereby further improving the adjustment accuracy of the adjustment mechanism 300, reducing the adjustment difficulty of the reflector 200, reducing the assembly difficulty of the optical engine, and improving the production efficiency of the laser projection display device.

[0129] For other parts of the laser projection display device of the second embodiment of the present application, reference may be made to the description of the relevant parts of the first embodiment of the present application, and will not be repeated here.

[0130] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solution to deviate from the scope of the technical solution of the embodiments of the present application.

[0131] For the convenience of explanation, the above description has been made in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different variations of the embodiments suitable for specific use considerations.

Claims

1. A laser projection display device, characterized in that: include: An optical engine configured to project an image outwardly, the optical engine comprising: an engine housing configured with a receiving cavity; an optical element, which is located in the accommodating cavity; An adjustment mechanism connected to the optical element and configured to adjust the position of the optical element; wherein the adjustment mechanism comprises: A fixing member connected to the optical element; a displacement adjustment assembly configured to adjust the displacement of the fixing member and the optical element along the first axis; The first adjusting member is connected to a side wall of the engine housing for rotation around the first axis, and has a first limiting surface and a second limiting surface in contact with the fixing member, and the first limiting surface and the second limiting surface are both partial spherical surfaces whose axes are located on the first axis; the first adjusting member is provided with a first pushing surface that intersects with and is not perpendicular to the first axis; the fixing member has two first abutting portions of equal length on a side facing the first adjusting member, and the two first abutting portions are both in abutment with the first pushing surface; when the first adjusting member rotates relative to the housing and limits the fixing member and the optical element from rotating around the first axis, the first pushing surface pushes the two first abutting portions, and under the limiting action of the first limiting surface and the second limiting surface, the fixing member and the optical element rotate around a second axis that is perpendicular to and intersects the first axis.

2. The laser projection display device according to claim 1, characterized in that: The first adjusting member is located between a side wall of the engine housing and the fixing member, a first groove or a first protrusion is provided on a side of the first adjusting member facing the fixing member, and a first limiting surface is provided on a circumferential side of the first groove or the first protrusion around the first axis; the first pushing surface is provided at the bottom of the first groove or at an end of the first protrusion; The side of the fixing member facing the first adjusting member has a first protrusion accommodated in the first groove or a first groove sleeved on the first protrusion, and the circumferential side of the first protrusion or the first groove is provided with the second limiting surface; the end of the first protrusion or the bottom of the first groove is provided with two first abutting portions, and the two first abutting portions are respectively located on both sides of the first axis.

3. The laser projection display device according to claim 2, characterized in that: The adjustment mechanism further includes a second adjustment member, the second adjustment member is located between the first adjustment member and the fixing member, the first protrusion or the first groove is provided on the side of the second adjustment member facing the first adjustment member; a second groove or a second protrusion is provided on the side of the second adjustment member facing the fixing member, a third limiting surface is provided on the circumferential side of the second groove or the second protrusion around the first axis; a second pushing surface is provided at the bottom of the second groove or the end of the second protrusion, and the second pushing surface rotates 90° around the first axis relative to the first pushing surface; The fixing member has a second protrusion accommodated in the second groove or a second groove sleeved on the second protrusion on one side facing the second adjusting member, and a fourth limiting surface in contact with the third limiting surface is provided on the circumferential side of the second protrusion or the second groove, and both the third limiting surface and the fourth limiting surface are second partial spherical surfaces with the center of the sphere located on the first axis; two second abutting portions of equal length are provided at the end of the second protrusion or the bottom of the second groove, and the two second abutting portions are respectively located on both sides of the first axis and abut against the second pushing surface; Among them, when the first adjusting member and the second adjusting member are rotated synchronously and the fixing member is restricted from rotating around the first axis, the second pushing surface pushes the two second abutting parts, and the third limiting surface and the fourth limiting surface rotate relative to each other, so that the fixing member and the optical element rotate around a third axis that is perpendicular to and intersects with the first axis and is perpendicular to the second axis.

4. The laser projection display device according to claim 3, characterized in that: The first adjusting member is provided with the first groove on one side thereof facing the fixing member, and the first limiting notch facing the second adjusting member is provided on the circumferential side of the first groove; The first protrusion is arranged on a side of the second adjusting member facing the first adjusting member, and a first limiting protrusion is arranged on a circumferential side of the first protrusion. The first limiting protrusion is inserted into the first limiting notch.

5. The laser projection display device according to claim 3, characterized in that: The second adjusting member is provided with the second groove on one side facing the fixing member, and the circumferential side of the second groove is provided with a second limiting notch facing the fixing member; The second protrusion is arranged on one side of the fixing member facing the second adjusting member, and a second limiting protrusion is arranged on the circumferential side of the second protrusion. The second limiting protrusion is inserted into the second limiting notch.

6. The laser projection display device according to claim 1, characterized in that: One of the first adjustment member and the side wall is provided with a cylindrical connecting protrusion, the axis of the cylindrical connecting protrusion is the first axis; the other is provided with an annular connecting groove, and the annular connecting groove is sleeved on the cylindrical connecting protrusion.

7. The laser projection display device according to claim 1, characterized in that: A first operating portion is disposed on the outer side of the first adjusting member, and the first adjusting member is rotated by the first operating portion.

8. The laser projection display device according to any one of claims 3 to 7, characterized in that: The side wall is provided with a first through hole, and the axis of the first through hole coincides with the first axis; The first adjusting member is provided with a second through hole, and the second through hole is opposite to the first through hole; The second adjusting member is provided with a third through hole, and the third through hole is opposite to the second through hole; A threaded hole is provided on one side of the fixing member facing the second adjusting member; The displacement adjustment assembly includes an adjustment bolt and a compression elastic member, wherein the adjustment bolt is sequentially inserted into the first through hole, the second through hole and the third through hole and connected to the threaded hole; the compression elastic member is located between the first adjustment member and the side wall, and the two ends of the compression elastic member abut against the side wall and the first adjustment member respectively, and a thrust is applied to the side wall and the first adjustment member so that the end cap of the adjustment bolt abuts against the side wall, and the first adjustment member, the second adjustment member and the fixing member abut against each other; When the adjusting bolt is rotated, the fixing member moves along the first axis under the thrust of the compression elastic member.

9. The laser projection display device according to any one of claims 1 to 7, characterized in that: A rotation limiting portion is provided on the bottom surface of the engine housing adjacent to the side wall, and a side of the rotation limiting portion facing away from the bottom surface abuts against the fixing member, and the rotation limiting portion limits the rotation of the fixing member around the first axis.

10. The laser projection display device according to any one of claims 1 to 7, characterized in that: The engine housing is provided with an adjustment through hole, the adjustment through hole is opposite to the adjustment mechanism, and a packaging sheet is provided on the upper cover of the adjustment through hole.

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